mono/mini/mini.c

   1 /*
   2  * mini.c: The new Mono code generator.
   3  *
   4  * Authors:
   5  *   Paolo Molaro (lupus@ximian.com)
   6  *   Dietmar Maurer (dietmar@ximian.com)
   7  *
   8  * Copyright 2002-2003 Ximian, Inc.
   9  * Copyright 2003-2010 Novell, Inc.
  10  * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
  11  */
  12
  13 #include <config.h>
  14 #ifdef HAVE_ALLOCA_H
  15 #include <alloca.h>
  16 #endif
  17 #ifdef HAVE_UNISTD_H
  18 #include <unistd.h>
  19 #endif
  20 #include <math.h>
  21 #ifdef HAVE_SYS_TIME_H
  22 #include <sys/time.h>
  23 #endif
  24
  25 #include <mono/utils/memcheck.h>
  26
  27 #include <mono/metadata/assembly.h>
  28 #include <mono/metadata/loader.h>
  29 #include <mono/metadata/tabledefs.h>
  30 #include <mono/metadata/class.h>
  31 #include <mono/metadata/object.h>
  32 #include <mono/metadata/tokentype.h>
  33 #include <mono/metadata/tabledefs.h>
  34 #include <mono/metadata/threads.h>
  35 #include <mono/metadata/appdomain.h>
  36 #include <mono/metadata/debug-helpers.h>
  37 #include "mono/metadata/profiler.h"
  38 #include <mono/metadata/profiler-private.h>
  39 #include <mono/metadata/mono-config.h>
  40 #include <mono/metadata/environment.h>
  41 #include <mono/metadata/mono-debug.h>
  42 #include <mono/metadata/gc-internals.h>
  43 #include <mono/metadata/threads-types.h>
  44 #include <mono/metadata/verify.h>
  45 #include <mono/metadata/verify-internals.h>
  46 #include <mono/metadata/mempool-internals.h>
  47 #include <mono/metadata/attach.h>
  48 #include <mono/metadata/runtime.h>
  49 #include <mono/utils/mono-math.h>
  50 #include <mono/utils/mono-compiler.h>
  51 #include <mono/utils/mono-counters.h>
  52 #include <mono/utils/mono-error-internals.h>
  53 #include <mono/utils/mono-logger-internals.h>
  54 #include <mono/utils/mono-mmap.h>
  55 #include <mono/utils/mono-path.h>
  56 #include <mono/utils/mono-tls.h>
  57 #include <mono/utils/mono-hwcap.h>
  58 #include <mono/utils/dtrace.h>
  59 #include <mono/utils/mono-threads.h>
  60 #include <mono/io-layer/io-layer.h>
  61
  62 #include "mini.h"
  63 #include "seq-points.h"
  64 #include "tasklets.h"
  65 #include <string.h>
  66 #include <ctype.h>
  67 #include "trace.h"
  68 #include "version.h"
  69 #include "ir-emit.h"
  70
  71 #include "jit-icalls.h"
  72
  73 #include "mini-gc.h"
  74 #include "debugger-agent.h"
  75 #include "llvm-runtime.h"
  76 #include "mini-llvm.h"
  77
  78 MonoTraceSpec *mono_jit_trace_calls;
  79 MonoMethodDesc *mono_inject_async_exc_method;
  80 int mono_inject_async_exc_pos;
  81 MonoMethodDesc *mono_break_at_bb_method;
  82 int mono_break_at_bb_bb_num;
  83 gboolean mono_do_x86_stack_align = TRUE;
  84 gboolean mono_using_xdebug;
  85
  86 #define mono_jit_lock() mono_os_mutex_lock (&jit_mutex)
  87 #define mono_jit_unlock() mono_os_mutex_unlock (&jit_mutex)
  88 static mono_mutex_t jit_mutex;
  89
  90 MonoBackend *current_backend;
  91
  92 #ifndef DISABLE_JIT
  93
  94 gpointer
  95 mono_realloc_native_code (MonoCompile *cfg)
  96 {
  97 #if defined(__default_codegen__)
  98         return g_realloc (cfg->native_code, cfg->code_size);
  99 #elif defined(__native_client_codegen__)
 100         guint old_padding;
 101         gpointer native_code;
 102         guint alignment_check;
 103
 104         /* Save the old alignment offset so we can re-align after the realloc. */
 105         old_padding = (guint)(cfg->native_code - cfg->native_code_alloc);
 106         cfg->code_size = NACL_BUNDLE_ALIGN_UP (cfg->code_size);
 107
 108         cfg->native_code_alloc = g_realloc ( cfg->native_code_alloc,
 109                                                                                  cfg->code_size + kNaClAlignment );
 110
 111         /* Align native_code to next nearest kNaClAlignment byte. */
 112         native_code = (guint)cfg->native_code_alloc + kNaClAlignment;
 113         native_code = (guint)native_code & ~kNaClAlignmentMask;
 114
 115         /* Shift the data to be 32-byte aligned again. */
 116         memmove (native_code, cfg->native_code_alloc + old_padding, cfg->code_size);
 117
 118         alignment_check = (guint)native_code & kNaClAlignmentMask;
 119         g_assert (alignment_check == 0);
 120         return native_code;
 121 #else
 122         g_assert_not_reached ();
 123         return cfg->native_code;
 124 #endif
 125 }
 126
 127 #ifdef __native_client_codegen__
 128
 129 /* Prevent instructions from straddling a 32-byte alignment boundary.   */
 130 /* Instructions longer than 32 bytes must be aligned internally.        */
 131 /* IN: pcode, instlen                                                   */
 132 /* OUT: pcode                                                           */
 133 void mono_nacl_align_inst(guint8 **pcode, int instlen) {
 134   int space_in_block;
 135
 136   space_in_block = kNaClAlignment - ((uintptr_t)(*pcode) & kNaClAlignmentMask);
 137
 138   if (G_UNLIKELY (instlen >= kNaClAlignment)) {
 139     g_assert_not_reached();
 140   } else if (instlen > space_in_block) {
 141     *pcode = mono_arch_nacl_pad(*pcode, space_in_block);
 142   }
 143 }
 144
 145 /* Move emitted call sequence to the end of a kNaClAlignment-byte block.  */
 146 /* IN: start    pointer to start of call sequence                         */
 147 /* IN: pcode    pointer to end of call sequence (current "IP")            */
 148 /* OUT: start   pointer to the start of the call sequence after padding   */
 149 /* OUT: pcode   pointer to the end of the call sequence after padding     */
 150 void mono_nacl_align_call(guint8 **start, guint8 **pcode) {
 151   const size_t MAX_NACL_CALL_LENGTH = kNaClAlignment;
 152   guint8 copy_of_call[MAX_NACL_CALL_LENGTH];
 153   guint8 *temp;
 154
 155   const size_t length = (size_t)((*pcode)-(*start));
 156   g_assert(length < MAX_NACL_CALL_LENGTH);
 157
 158   memcpy(copy_of_call, *start, length);
 159   temp = mono_nacl_pad_call(*start, (guint8)length);
 160   memcpy(temp, copy_of_call, length);
 161   (*start) = temp;
 162   (*pcode) = temp + length;
 163 }
 164
 165 /* mono_nacl_pad_call(): Insert padding for Native Client call instructions */
 166 /*    code     pointer to buffer for emitting code                          */
 167 /*    ilength  length of call instruction                                   */
 168 guint8 *mono_nacl_pad_call(guint8 *code, guint8 ilength) {
 169   int freeSpaceInBlock = kNaClAlignment - ((uintptr_t)code & kNaClAlignmentMask);
 170   int padding = freeSpaceInBlock - ilength;
 171
 172   if (padding < 0) {
 173     /* There isn't enough space in this block for the instruction. */
 174     /* Fill this block and start a new one.                        */
 175     code = mono_arch_nacl_pad(code, freeSpaceInBlock);
 176     freeSpaceInBlock = kNaClAlignment;
 177     padding = freeSpaceInBlock - ilength;
 178   }
 179   g_assert(ilength > 0);
 180   g_assert(padding >= 0);
 181   g_assert(padding < kNaClAlignment);
 182   if (0 == padding) return code;
 183   return mono_arch_nacl_pad(code, padding);
 184 }
 185
 186 guint8 *mono_nacl_align(guint8 *code) {
 187   int padding = kNaClAlignment - ((uintptr_t)code & kNaClAlignmentMask);
 188   if (padding != kNaClAlignment) code = mono_arch_nacl_pad(code, padding);
 189   return code;
 190 }
 191
 192 void mono_nacl_fix_patches(const guint8 *code, MonoJumpInfo *ji)
 193 {
 194 #ifndef USE_JUMP_TABLES
 195   MonoJumpInfo *patch_info;
 196   for (patch_info = ji; patch_info; patch_info = patch_info->next) {
 197     unsigned char *ip = patch_info->ip.i + code;
 198     ip = mono_arch_nacl_skip_nops(ip);
 199     patch_info->ip.i = ip - code;
 200   }
 201 #endif
 202 }
 203 #endif  /* __native_client_codegen__ */
 204
 205 #ifdef USE_JUMP_TABLES
 206
 207 #define DEFAULT_JUMPTABLE_CHUNK_ELEMENTS 128
 208
 209 typedef struct MonoJumpTableChunk {
 210         guint32 total;
 211         guint32 active;
 212         struct MonoJumpTableChunk *previous;
 213         /* gpointer entries[total]; */
 214 } MonoJumpTableChunk;
 215
 216 static MonoJumpTableChunk* g_jumptable;
 217 #define mono_jumptable_lock() mono_os_mutex_lock (&jumptable_mutex)
 218 #define mono_jumptable_unlock() mono_os_mutex_unlock (&jumptable_mutex)
 219 static mono_mutex_t jumptable_mutex;
 220
 221 static  MonoJumpTableChunk*
 222 mono_create_jumptable_chunk (guint32 max_entries)
 223 {
 224         guint32 size = sizeof (MonoJumpTableChunk) + max_entries * sizeof(gpointer);
 225         MonoJumpTableChunk *chunk = (MonoJumpTableChunk*) g_new0 (guchar, size);
 226         chunk->total = max_entries;
 227         return chunk;
 228 }
 229
 230 void
 231 mono_jumptable_init (void)
 232 {
 233         if (g_jumptable == NULL) {
 234                 mono_os_mutex_init_recursive (&jumptable_mutex);
 235                 g_jumptable = mono_create_jumptable_chunk (DEFAULT_JUMPTABLE_CHUNK_ELEMENTS);
 236         }
 237 }
 238
 239 gpointer*
 240 mono_jumptable_add_entry (void)
 241 {
 242         return mono_jumptable_add_entries (1);
 243 }
 244
 245 gpointer*
 246 mono_jumptable_add_entries (guint32 entries)
 247 {
 248         guint32 index;
 249         gpointer *result;
 250
 251         mono_jumptable_init ();
 252         mono_jumptable_lock ();
 253         index = g_jumptable->active;
 254         if (index + entries >= g_jumptable->total) {
 255                 /*
 256                  * Grow jumptable, by adding one more chunk.
 257                  * We cannot realloc jumptable, as there could be pointers
 258                  * to existing jump table entries in the code, so instead
 259                  * we just add one more chunk.
 260                  */
 261                 guint32 max_entries = entries;
 262                 MonoJumpTableChunk *new_chunk;
 263
 264                 if (max_entries < DEFAULT_JUMPTABLE_CHUNK_ELEMENTS)
 265                         max_entries = DEFAULT_JUMPTABLE_CHUNK_ELEMENTS;
 266                 new_chunk = mono_create_jumptable_chunk (max_entries);
 267                 /* Link old jumptable, so that we could free it up later. */
 268                 new_chunk->previous = g_jumptable;
 269                 g_jumptable = new_chunk;
 270                 index = 0;
 271         }
 272         g_jumptable->active = index + entries;
 273         result = (gpointer*)((guchar*)g_jumptable + sizeof(MonoJumpTableChunk)) + index;
 274         mono_jumptable_unlock();
 275
 276         return result;
 277 }
 278
 279 void
 280 mono_jumptable_cleanup (void)
 281 {
 282         if (g_jumptable) {
 283                 MonoJumpTableChunk *current = g_jumptable, *prev;
 284                 while (current != NULL) {
 285                         prev = current->previous;
 286                         g_free (current);
 287                         current = prev;
 288                 }
 289                 g_jumptable = NULL;
 290                 mono_os_mutex_destroy (&jumptable_mutex);
 291         }
 292 }
 293
 294 gpointer*
 295 mono_jumptable_get_entry (guint8 *code_ptr)
 296 {
 297         return mono_arch_jumptable_entry_from_code (code_ptr);
 298 }
 299
 300 #endif /* USE_JUMP_TABLES */
 301
 302 typedef struct {
 303         MonoExceptionClause *clause;
 304         MonoBasicBlock *basic_block;
 305         int start_offset;
 306 } TryBlockHole;
 307
 308 /**
 309  * mono_emit_unwind_op:
 310  *
 311  *   Add an unwind op with the given parameters for the list of unwind ops stored in
 312  * cfg->unwind_ops.
 313  */
 314 void
 315 mono_emit_unwind_op (MonoCompile *cfg, int when, int tag, int reg, int val)
 316 {
 317         MonoUnwindOp *op = (MonoUnwindOp *)mono_mempool_alloc0 (cfg->mempool, sizeof (MonoUnwindOp));
 318
 319         op->op = tag;
 320         op->reg = reg;
 321         op->val = val;
 322         op->when = when;
 323
 324         cfg->unwind_ops = g_slist_append_mempool (cfg->mempool, cfg->unwind_ops, op);
 325         if (cfg->verbose_level > 1) {
 326                 switch (tag) {
 327                 case DW_CFA_def_cfa:
 328                         printf ("CFA: [%x] def_cfa: %s+0x%x\n", when, mono_arch_regname (reg), val);
 329                         break;
 330                 case DW_CFA_def_cfa_register:
 331                         printf ("CFA: [%x] def_cfa_reg: %s\n", when, mono_arch_regname (reg));
 332                         break;
 333                 case DW_CFA_def_cfa_offset:
 334                         printf ("CFA: [%x] def_cfa_offset: 0x%x\n", when, val);
 335                         break;
 336                 case DW_CFA_offset:
 337                         printf ("CFA: [%x] offset: %s at cfa-0x%x\n", when, mono_arch_regname (reg), -val);
 338                         break;
 339                 }
 340         }
 341 }
 342
 343 #define MONO_INIT_VARINFO(vi,id) do { \
 344         (vi)->range.first_use.pos.bid = 0xffff; \
 345         (vi)->reg = -1; \
 346         (vi)->idx = (id); \
 347 } while (0)
 348
 349 /**
 350  * mono_unlink_bblock:
 351  *
 352  *   Unlink two basic blocks.
 353  */
 354 void
 355 mono_unlink_bblock (MonoCompile *cfg, MonoBasicBlock *from, MonoBasicBlock* to)
 356 {
 357         int i, pos;
 358         gboolean found;
 359
 360         found = FALSE;
 361         for (i = 0; i < from->out_count; ++i) {
 362                 if (to == from->out_bb [i]) {
 363                         found = TRUE;
 364                         break;
 365                 }
 366         }
 367         if (found) {
 368                 pos = 0;
 369                 for (i = 0; i < from->out_count; ++i) {
 370                         if (from->out_bb [i] != to)
 371                                 from->out_bb [pos ++] = from->out_bb [i];
 372                 }
 373                 g_assert (pos == from->out_count - 1);
 374                 from->out_count--;
 375         }
 376
 377         found = FALSE;
 378         for (i = 0; i < to->in_count; ++i) {
 379                 if (from == to->in_bb [i]) {
 380                         found = TRUE;
 381                         break;
 382                 }
 383         }
 384         if (found) {
 385                 pos = 0;
 386                 for (i = 0; i < to->in_count; ++i) {
 387                         if (to->in_bb [i] != from)
 388                                 to->in_bb [pos ++] = to->in_bb [i];
 389                 }
 390                 g_assert (pos == to->in_count - 1);
 391                 to->in_count--;
 392         }
 393 }
 394
 395 /*
 396  * mono_bblocks_linked:
 397  *
 398  *   Return whenever BB1 and BB2 are linked in the CFG.
 399  */
 400 gboolean
 401 mono_bblocks_linked (MonoBasicBlock *bb1, MonoBasicBlock *bb2)
 402 {
 403         int i;
 404
 405         for (i = 0; i < bb1->out_count; ++i) {
 406                 if (bb1->out_bb [i] == bb2)
 407                         return TRUE;
 408         }
 409
 410         return FALSE;
 411 }
 412
 413 static int
 414 mono_find_block_region_notry (MonoCompile *cfg, int offset)
 415 {
 416         MonoMethodHeader *header = cfg->header;
 417         MonoExceptionClause *clause;
 418         int i;
 419
 420         for (i = 0; i < header->num_clauses; ++i) {
 421                 clause = &header->clauses [i];
 422                 if ((clause->flags == MONO_EXCEPTION_CLAUSE_FILTER) && (offset >= clause->data.filter_offset) &&
 423                     (offset < (clause->handler_offset)))
 424                         return ((i + 1) << 8) | MONO_REGION_FILTER | clause->flags;
 425
 426                 if (MONO_OFFSET_IN_HANDLER (clause, offset)) {
 427                         if (clause->flags == MONO_EXCEPTION_CLAUSE_FINALLY)
 428                                 return ((i + 1) << 8) | MONO_REGION_FINALLY | clause->flags;
 429                         else if (clause->flags == MONO_EXCEPTION_CLAUSE_FAULT)
 430                                 return ((i + 1) << 8) | MONO_REGION_FAULT | clause->flags;
 431                         else
 432                                 return ((i + 1) << 8) | MONO_REGION_CATCH | clause->flags;
 433                 }
 434         }
 435
 436         return -1;
 437 }
 438
 439 /*
 440  * mono_get_block_region_notry:
 441  *
 442  *   Return the region corresponding to REGION, ignoring try clauses nested inside
 443  * finally clauses.
 444  */
 445 int
 446 mono_get_block_region_notry (MonoCompile *cfg, int region)
 447 {
 448         if ((region & (0xf << 4)) == MONO_REGION_TRY) {
 449                 MonoMethodHeader *header = cfg->header;
 450
 451                 /*
 452                  * This can happen if a try clause is nested inside a finally clause.
 453                  */
 454                 int clause_index = (region >> 8) - 1;
 455                 g_assert (clause_index >= 0 && clause_index < header->num_clauses);
 456
 457                 region = mono_find_block_region_notry (cfg, header->clauses [clause_index].try_offset);
 458         }
 459
 460         return region;
 461 }
 462
 463 MonoInst *
 464 mono_find_spvar_for_region (MonoCompile *cfg, int region)
 465 {
 466         region = mono_get_block_region_notry (cfg, region);
 467
 468         return (MonoInst *)g_hash_table_lookup (cfg->spvars, GINT_TO_POINTER (region));
 469 }
 470
 471 static void
 472 df_visit (MonoBasicBlock *start, int *dfn, MonoBasicBlock **array)
 473 {
 474         int i;
 475
 476         array [*dfn] = start;
 477         /* g_print ("visit %d at %p (BB%ld)\n", *dfn, start->cil_code, start->block_num); */
 478         for (i = 0; i < start->out_count; ++i) {
 479                 if (start->out_bb [i]->dfn)
 480                         continue;
 481                 (*dfn)++;
 482                 start->out_bb [i]->dfn = *dfn;
 483                 start->out_bb [i]->df_parent = start;
 484                 array [*dfn] = start->out_bb [i];
 485                 df_visit (start->out_bb [i], dfn, array);
 486         }
 487 }
 488
 489 guint32
 490 mono_reverse_branch_op (guint32 opcode)
 491 {
 492         static const int reverse_map [] = {
 493                 CEE_BNE_UN, CEE_BLT, CEE_BLE, CEE_BGT, CEE_BGE,
 494                 CEE_BEQ, CEE_BLT_UN, CEE_BLE_UN, CEE_BGT_UN, CEE_BGE_UN
 495         };
 496         static const int reverse_fmap [] = {
 497                 OP_FBNE_UN, OP_FBLT, OP_FBLE, OP_FBGT, OP_FBGE,
 498                 OP_FBEQ, OP_FBLT_UN, OP_FBLE_UN, OP_FBGT_UN, OP_FBGE_UN
 499         };
 500         static const int reverse_lmap [] = {
 501                 OP_LBNE_UN, OP_LBLT, OP_LBLE, OP_LBGT, OP_LBGE,
 502                 OP_LBEQ, OP_LBLT_UN, OP_LBLE_UN, OP_LBGT_UN, OP_LBGE_UN
 503         };
 504         static const int reverse_imap [] = {
 505                 OP_IBNE_UN, OP_IBLT, OP_IBLE, OP_IBGT, OP_IBGE,
 506                 OP_IBEQ, OP_IBLT_UN, OP_IBLE_UN, OP_IBGT_UN, OP_IBGE_UN
 507         };
 508
 509         if (opcode >= CEE_BEQ && opcode <= CEE_BLT_UN) {
 510                 opcode = reverse_map [opcode - CEE_BEQ];
 511         } else if (opcode >= OP_FBEQ && opcode <= OP_FBLT_UN) {
 512                 opcode = reverse_fmap [opcode - OP_FBEQ];
 513         } else if (opcode >= OP_LBEQ && opcode <= OP_LBLT_UN) {
 514                 opcode = reverse_lmap [opcode - OP_LBEQ];
 515         } else if (opcode >= OP_IBEQ && opcode <= OP_IBLT_UN) {
 516                 opcode = reverse_imap [opcode - OP_IBEQ];
 517         } else
 518                 g_assert_not_reached ();
 519
 520         return opcode;
 521 }
 522
 523 guint
 524 mono_type_to_store_membase (MonoCompile *cfg, MonoType *type)
 525 {
 526         type = mini_get_underlying_type (type);
 527
 528 handle_enum:
 529         switch (type->type) {
 530         case MONO_TYPE_I1:
 531         case MONO_TYPE_U1:
 532                 return OP_STOREI1_MEMBASE_REG;
 533         case MONO_TYPE_I2:
 534         case MONO_TYPE_U2:
 535                 return OP_STOREI2_MEMBASE_REG;
 536         case MONO_TYPE_I4:
 537         case MONO_TYPE_U4:
 538                 return OP_STOREI4_MEMBASE_REG;
 539         case MONO_TYPE_I:
 540         case MONO_TYPE_U:
 541         case MONO_TYPE_PTR:
 542         case MONO_TYPE_FNPTR:
 543                 return OP_STORE_MEMBASE_REG;
 544         case MONO_TYPE_CLASS:
 545         case MONO_TYPE_STRING:
 546         case MONO_TYPE_OBJECT:
 547         case MONO_TYPE_SZARRAY:
 548         case MONO_TYPE_ARRAY:
 549                 return OP_STORE_MEMBASE_REG;
 550         case MONO_TYPE_I8:
 551         case MONO_TYPE_U8:
 552                 return OP_STOREI8_MEMBASE_REG;
 553         case MONO_TYPE_R4:
 554                 return OP_STORER4_MEMBASE_REG;
 555         case MONO_TYPE_R8:
 556                 return OP_STORER8_MEMBASE_REG;
 557         case MONO_TYPE_VALUETYPE:
 558                 if (type->data.klass->enumtype) {
 559                         type = mono_class_enum_basetype (type->data.klass);
 560                         goto handle_enum;
 561                 }
 562                 if (MONO_CLASS_IS_SIMD (cfg, mono_class_from_mono_type (type)))
 563                         return OP_STOREX_MEMBASE;
 564                 return OP_STOREV_MEMBASE;
 565         case MONO_TYPE_TYPEDBYREF:
 566                 return OP_STOREV_MEMBASE;
 567         case MONO_TYPE_GENERICINST:
 568                 type = &type->data.generic_class->container_class->byval_arg;
 569                 goto handle_enum;
 570         case MONO_TYPE_VAR:
 571         case MONO_TYPE_MVAR:
 572                 g_assert (mini_type_var_is_vt (type));
 573                 return OP_STOREV_MEMBASE;
 574         default:
 575                 g_error ("unknown type 0x%02x in type_to_store_membase", type->type);
 576         }
 577         return -1;
 578 }
 579
 580 guint
 581 mono_type_to_load_membase (MonoCompile *cfg, MonoType *type)
 582 {
 583         type = mini_get_underlying_type (type);
 584
 585         switch (type->type) {
 586         case MONO_TYPE_I1:
 587                 return OP_LOADI1_MEMBASE;
 588         case MONO_TYPE_U1:
 589                 return OP_LOADU1_MEMBASE;
 590         case MONO_TYPE_I2:
 591                 return OP_LOADI2_MEMBASE;
 592         case MONO_TYPE_U2:
 593                 return OP_LOADU2_MEMBASE;
 594         case MONO_TYPE_I4:
 595                 return OP_LOADI4_MEMBASE;
 596         case MONO_TYPE_U4:
 597                 return OP_LOADU4_MEMBASE;
 598         case MONO_TYPE_I:
 599         case MONO_TYPE_U:
 600         case MONO_TYPE_PTR:
 601         case MONO_TYPE_FNPTR:
 602                 return OP_LOAD_MEMBASE;
 603         case MONO_TYPE_CLASS:
 604         case MONO_TYPE_STRING:
 605         case MONO_TYPE_OBJECT:
 606         case MONO_TYPE_SZARRAY:
 607         case MONO_TYPE_ARRAY:
 608                 return OP_LOAD_MEMBASE;
 609         case MONO_TYPE_I8:
 610         case MONO_TYPE_U8:
 611                 return OP_LOADI8_MEMBASE;
 612         case MONO_TYPE_R4:
 613                 return OP_LOADR4_MEMBASE;
 614         case MONO_TYPE_R8:
 615                 return OP_LOADR8_MEMBASE;
 616         case MONO_TYPE_VALUETYPE:
 617                 if (MONO_CLASS_IS_SIMD (cfg, mono_class_from_mono_type (type)))
 618                         return OP_LOADX_MEMBASE;
 619         case MONO_TYPE_TYPEDBYREF:
 620                 return OP_LOADV_MEMBASE;
 621         case MONO_TYPE_GENERICINST:
 622                 if (mono_type_generic_inst_is_valuetype (type))
 623                         return OP_LOADV_MEMBASE;
 624                 else
 625                         return OP_LOAD_MEMBASE;
 626                 break;
 627         case MONO_TYPE_VAR:
 628         case MONO_TYPE_MVAR:
 629                 g_assert (cfg->gshared);
 630                 g_assert (mini_type_var_is_vt (type));
 631                 return OP_LOADV_MEMBASE;
 632         default:
 633                 g_error ("unknown type 0x%02x in type_to_load_membase", type->type);
 634         }
 635         return -1;
 636 }
 637
 638 guint
 639 mini_type_to_stind (MonoCompile* cfg, MonoType *type)
 640 {
 641         type = mini_get_underlying_type (type);
 642         if (cfg->gshared && !type->byref && (type->type == MONO_TYPE_VAR || type->type == MONO_TYPE_MVAR)) {
 643                 g_assert (mini_type_var_is_vt (type));
 644                 return CEE_STOBJ;
 645         }
 646         return mono_type_to_stind (type);
 647 }
 648
 649 int
 650 mono_op_imm_to_op (int opcode)
 651 {
 652         switch (opcode) {
 653         case OP_ADD_IMM:
 654 #if SIZEOF_REGISTER == 4
 655                 return OP_IADD;
 656 #else
 657                 return OP_LADD;
 658 #endif
 659         case OP_IADD_IMM:
 660                 return OP_IADD;
 661         case OP_LADD_IMM:
 662                 return OP_LADD;
 663         case OP_ISUB_IMM:
 664                 return OP_ISUB;
 665         case OP_LSUB_IMM:
 666                 return OP_LSUB;
 667         case OP_IMUL_IMM:
 668                 return OP_IMUL;
 669         case OP_AND_IMM:
 670 #if SIZEOF_REGISTER == 4
 671                 return OP_IAND;
 672 #else
 673                 return OP_LAND;
 674 #endif
 675         case OP_OR_IMM:
 676 #if SIZEOF_REGISTER == 4
 677                 return OP_IOR;
 678 #else
 679                 return OP_LOR;
 680 #endif
 681         case OP_XOR_IMM:
 682 #if SIZEOF_REGISTER == 4
 683                 return OP_IXOR;
 684 #else
 685                 return OP_LXOR;
 686 #endif
 687         case OP_IAND_IMM:
 688                 return OP_IAND;
 689         case OP_LAND_IMM:
 690                 return OP_LAND;
 691         case OP_IOR_IMM:
 692                 return OP_IOR;
 693         case OP_LOR_IMM:
 694                 return OP_LOR;
 695         case OP_IXOR_IMM:
 696                 return OP_IXOR;
 697         case OP_LXOR_IMM:
 698                 return OP_LXOR;
 699         case OP_ISHL_IMM:
 700                 return OP_ISHL;
 701         case OP_LSHL_IMM:
 702                 return OP_LSHL;
 703         case OP_ISHR_IMM:
 704                 return OP_ISHR;
 705         case OP_LSHR_IMM:
 706                 return OP_LSHR;
 707         case OP_ISHR_UN_IMM:
 708                 return OP_ISHR_UN;
 709         case OP_LSHR_UN_IMM:
 710                 return OP_LSHR_UN;
 711         case OP_IDIV_IMM:
 712                 return OP_IDIV;
 713         case OP_IDIV_UN_IMM:
 714                 return OP_IDIV_UN;
 715         case OP_IREM_UN_IMM:
 716                 return OP_IREM_UN;
 717         case OP_IREM_IMM:
 718                 return OP_IREM;
 719         case OP_LREM_IMM:
 720                 return OP_LREM;
 721         case OP_DIV_IMM:
 722 #if SIZEOF_REGISTER == 4
 723                 return OP_IDIV;
 724 #else
 725                 return OP_LDIV;
 726 #endif
 727         case OP_REM_IMM:
 728 #if SIZEOF_REGISTER == 4
 729                 return OP_IREM;
 730 #else
 731                 return OP_LREM;
 732 #endif
 733         case OP_ADDCC_IMM:
 734                 return OP_ADDCC;
 735         case OP_ADC_IMM:
 736                 return OP_ADC;
 737         case OP_SUBCC_IMM:
 738                 return OP_SUBCC;
 739         case OP_SBB_IMM:
 740                 return OP_SBB;
 741         case OP_IADC_IMM:
 742                 return OP_IADC;
 743         case OP_ISBB_IMM:
 744                 return OP_ISBB;
 745         case OP_COMPARE_IMM:
 746                 return OP_COMPARE;
 747         case OP_ICOMPARE_IMM:
 748                 return OP_ICOMPARE;
 749         case OP_LOCALLOC_IMM:
 750                 return OP_LOCALLOC;
 751         default:
 752                 printf ("%s\n", mono_inst_name (opcode));
 753                 g_assert_not_reached ();
 754                 return -1;
 755         }
 756 }
 757
 758 /*
 759  * mono_decompose_op_imm:
 760  *
 761  *   Replace the OP_.._IMM INS with its non IMM variant.
 762  */
 763 void
 764 mono_decompose_op_imm (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst *ins)
 765 {
 766         MonoInst *temp;
 767
 768         MONO_INST_NEW (cfg, temp, OP_ICONST);
 769         temp->inst_c0 = ins->inst_imm;
 770         temp->dreg = mono_alloc_ireg (cfg);
 771         mono_bblock_insert_before_ins (bb, ins, temp);
 772         ins->opcode = mono_op_imm_to_op (ins->opcode);
 773         if (ins->opcode == OP_LOCALLOC)
 774                 ins->sreg1 = temp->dreg;
 775         else
 776                 ins->sreg2 = temp->dreg;
 777
 778         bb->max_vreg = MAX (bb->max_vreg, cfg->next_vreg);
 779 }
 780
 781 static void
 782 set_vreg_to_inst (MonoCompile *cfg, int vreg, MonoInst *inst)
 783 {
 784         if (vreg >= cfg->vreg_to_inst_len) {
 785                 MonoInst **tmp = cfg->vreg_to_inst;
 786                 int size = cfg->vreg_to_inst_len;
 787
 788                 while (vreg >= cfg->vreg_to_inst_len)
 789                         cfg->vreg_to_inst_len = cfg->vreg_to_inst_len ? cfg->vreg_to_inst_len * 2 : 32;
 790                 cfg->vreg_to_inst = (MonoInst **)mono_mempool_alloc0 (cfg->mempool, sizeof (MonoInst*) * cfg->vreg_to_inst_len);
 791                 if (size)
 792                         memcpy (cfg->vreg_to_inst, tmp, size * sizeof (MonoInst*));
 793         }
 794         cfg->vreg_to_inst [vreg] = inst;
 795 }
 796
 797 #define mono_type_is_long(type) (!(type)->byref && ((mono_type_get_underlying_type (type)->type == MONO_TYPE_I8) || (mono_type_get_underlying_type (type)->type == MONO_TYPE_U8)))
 798 #define mono_type_is_float(type) (!(type)->byref && (((type)->type == MONO_TYPE_R8) || ((type)->type == MONO_TYPE_R4)))
 799
 800 MonoInst*
 801 mono_compile_create_var_for_vreg (MonoCompile *cfg, MonoType *type, int opcode, int vreg)
 802 {
 803         MonoInst *inst;
 804         int num = cfg->num_varinfo;
 805         gboolean regpair;
 806
 807         type = mini_get_underlying_type (type);
 808
 809         if ((num + 1) >= cfg->varinfo_count) {
 810                 int orig_count = cfg->varinfo_count;
 811                 cfg->varinfo_count = cfg->varinfo_count ? (cfg->varinfo_count * 2) : 32;
 812                 cfg->varinfo = (MonoInst **)g_realloc (cfg->varinfo, sizeof (MonoInst*) * cfg->varinfo_count);
 813                 cfg->vars = (MonoMethodVar *)g_realloc (cfg->vars, sizeof (MonoMethodVar) * cfg->varinfo_count);
 814                 memset (&cfg->vars [orig_count], 0, (cfg->varinfo_count - orig_count) * sizeof (MonoMethodVar));
 815         }
 816
 817         cfg->stat_allocate_var++;
 818
 819         MONO_INST_NEW (cfg, inst, opcode);
 820         inst->inst_c0 = num;
 821         inst->inst_vtype = type;
 822         inst->klass = mono_class_from_mono_type (type);
 823         type_to_eval_stack_type (cfg, type, inst);
 824         /* if set to 1 the variable is native */
 825         inst->backend.is_pinvoke = 0;
 826         inst->dreg = vreg;
 827
 828         if (inst->klass->exception_type)
 829                 mono_cfg_set_exception (cfg, MONO_EXCEPTION_TYPE_LOAD);
 830
 831         if (cfg->compute_gc_maps) {
 832                 if (type->byref) {
 833                         mono_mark_vreg_as_mp (cfg, vreg);
 834                 } else {
 835                         if ((MONO_TYPE_ISSTRUCT (type) && inst->klass->has_references) || mini_type_is_reference (type)) {
 836                                 inst->flags |= MONO_INST_GC_TRACK;
 837                                 mono_mark_vreg_as_ref (cfg, vreg);
 838                         }
 839                 }
 840         }
 841
 842         cfg->varinfo [num] = inst;
 843
 844         MONO_INIT_VARINFO (&cfg->vars [num], num);
 845         MONO_VARINFO (cfg, num)->vreg = vreg;
 846
 847         if (vreg != -1)
 848                 set_vreg_to_inst (cfg, vreg, inst);
 849
 850 #if SIZEOF_REGISTER == 4
 851         if (mono_arch_is_soft_float ()) {
 852                 regpair = mono_type_is_long (type) || mono_type_is_float (type);
 853         } else {
 854                 regpair = mono_type_is_long (type);
 855         }
 856 #else
 857         regpair = FALSE;
 858 #endif
 859
 860         if (regpair) {
 861                 MonoInst *tree;
 862
 863                 /*
 864                  * These two cannot be allocated using create_var_for_vreg since that would
 865                  * put it into the cfg->varinfo array, confusing many parts of the JIT.
 866                  */
 867
 868                 /*
 869                  * Set flags to VOLATILE so SSA skips it.
 870                  */
 871
 872                 if (cfg->verbose_level >= 4) {
 873                         printf ("  Create LVAR R%d (R%d, R%d)\n", inst->dreg, inst->dreg + 1, inst->dreg + 2);
 874                 }
 875
 876                 if (mono_arch_is_soft_float () && cfg->opt & MONO_OPT_SSA) {
 877                         if (mono_type_is_float (type))
 878                                 inst->flags = MONO_INST_VOLATILE;
 879                 }
 880
 881                 /* Allocate a dummy MonoInst for the first vreg */
 882                 MONO_INST_NEW (cfg, tree, OP_LOCAL);
 883                 tree->dreg = inst->dreg + 1;
 884                 if (cfg->opt & MONO_OPT_SSA)
 885                         tree->flags = MONO_INST_VOLATILE;
 886                 tree->inst_c0 = num;
 887                 tree->type = STACK_I4;
 888                 tree->inst_vtype = &mono_defaults.int32_class->byval_arg;
 889                 tree->klass = mono_class_from_mono_type (tree->inst_vtype);
 890
 891                 set_vreg_to_inst (cfg, inst->dreg + 1, tree);
 892
 893                 /* Allocate a dummy MonoInst for the second vreg */
 894                 MONO_INST_NEW (cfg, tree, OP_LOCAL);
 895                 tree->dreg = inst->dreg + 2;
 896                 if (cfg->opt & MONO_OPT_SSA)
 897                         tree->flags = MONO_INST_VOLATILE;
 898                 tree->inst_c0 = num;
 899                 tree->type = STACK_I4;
 900                 tree->inst_vtype = &mono_defaults.int32_class->byval_arg;
 901                 tree->klass = mono_class_from_mono_type (tree->inst_vtype);
 902
 903                 set_vreg_to_inst (cfg, inst->dreg + 2, tree);
 904         }
 905
 906         cfg->num_varinfo++;
 907         if (cfg->verbose_level > 2)
 908                 g_print ("created temp %d (R%d) of type %s\n", num, vreg, mono_type_get_name (type));
 909         return inst;
 910 }
 911
 912 MonoInst*
 913 mono_compile_create_var (MonoCompile *cfg, MonoType *type, int opcode)
 914 {
 915         int dreg;
 916         type = mini_get_underlying_type (type);
 917
 918         if (mono_type_is_long (type))
 919                 dreg = mono_alloc_dreg (cfg, STACK_I8);
 920         else if (mono_arch_is_soft_float () && mono_type_is_float (type))
 921                 dreg = mono_alloc_dreg (cfg, STACK_R8);
 922         else
 923                 /* All the others are unified */
 924                 dreg = mono_alloc_preg (cfg);
 925
 926         return mono_compile_create_var_for_vreg (cfg, type, opcode, dreg);
 927 }
 928
 929 MonoInst*
 930 mini_get_int_to_float_spill_area (MonoCompile *cfg)
 931 {
 932 #ifdef TARGET_X86
 933         if (!cfg->iconv_raw_var) {
 934                 cfg->iconv_raw_var = mono_compile_create_var (cfg, &mono_defaults.int32_class->byval_arg, OP_LOCAL);
 935                 cfg->iconv_raw_var->flags |= MONO_INST_VOLATILE; /*FIXME, use the don't regalloc flag*/
 936         }
 937         return cfg->iconv_raw_var;
 938 #else
 939         return NULL;
 940 #endif
 941 }
 942
 943 void
 944 mono_mark_vreg_as_ref (MonoCompile *cfg, int vreg)
 945 {
 946         if (vreg >= cfg->vreg_is_ref_len) {
 947                 gboolean *tmp = cfg->vreg_is_ref;
 948                 int size = cfg->vreg_is_ref_len;
 949
 950                 while (vreg >= cfg->vreg_is_ref_len)
 951                         cfg->vreg_is_ref_len = cfg->vreg_is_ref_len ? cfg->vreg_is_ref_len * 2 : 32;
 952                 cfg->vreg_is_ref = (gboolean *)mono_mempool_alloc0 (cfg->mempool, sizeof (gboolean) * cfg->vreg_is_ref_len);
 953                 if (size)
 954                         memcpy (cfg->vreg_is_ref, tmp, size * sizeof (gboolean));
 955         }
 956         cfg->vreg_is_ref [vreg] = TRUE;
 957 }
 958
 959 void
 960 mono_mark_vreg_as_mp (MonoCompile *cfg, int vreg)
 961 {
 962         if (vreg >= cfg->vreg_is_mp_len) {
 963                 gboolean *tmp = cfg->vreg_is_mp;
 964                 int size = cfg->vreg_is_mp_len;
 965
 966                 while (vreg >= cfg->vreg_is_mp_len)
 967                         cfg->vreg_is_mp_len = cfg->vreg_is_mp_len ? cfg->vreg_is_mp_len * 2 : 32;
 968                 cfg->vreg_is_mp = (gboolean *)mono_mempool_alloc0 (cfg->mempool, sizeof (gboolean) * cfg->vreg_is_mp_len);
 969                 if (size)
 970                         memcpy (cfg->vreg_is_mp, tmp, size * sizeof (gboolean));
 971         }
 972         cfg->vreg_is_mp [vreg] = TRUE;
 973 }
 974
 975 static MonoType*
 976 type_from_stack_type (MonoInst *ins)
 977 {
 978         switch (ins->type) {
 979         case STACK_I4: return &mono_defaults.int32_class->byval_arg;
 980         case STACK_I8: return &mono_defaults.int64_class->byval_arg;
 981         case STACK_PTR: return &mono_defaults.int_class->byval_arg;
 982         case STACK_R8: return &mono_defaults.double_class->byval_arg;
 983         case STACK_MP:
 984                 /*
 985                  * this if used to be commented without any specific reason, but
 986                  * it breaks #80235 when commented
 987                  */
 988                 if (ins->klass)
 989                         return &ins->klass->this_arg;
 990                 else
 991                         return &mono_defaults.object_class->this_arg;
 992         case STACK_OBJ:
 993                 /* ins->klass may not be set for ldnull.
 994                  * Also, if we have a boxed valuetype, we want an object lass,
 995                  * not the valuetype class
 996                  */
 997                 if (ins->klass && !ins->klass->valuetype)
 998                         return &ins->klass->byval_arg;
 999                 return &mono_defaults.object_class->byval_arg;
1000         case STACK_VTYPE: return &ins->klass->byval_arg;
1001         default:
1002                 g_error ("stack type %d to montype not handled\n", ins->type);
1003         }
1004         return NULL;
1005 }
1006
1007 MonoType*
1008 mono_type_from_stack_type (MonoInst *ins)
1009 {
1010         return type_from_stack_type (ins);
1011 }
1012
1013 /*
1014  * mono_add_ins_to_end:
1015  *
1016  *   Same as MONO_ADD_INS, but add INST before any branches at the end of BB.
1017  */
1018 void
1019 mono_add_ins_to_end (MonoBasicBlock *bb, MonoInst *inst)
1020 {
1021         int opcode;
1022
1023         if (!bb->code) {
1024                 MONO_ADD_INS (bb, inst);
1025                 return;
1026         }
1027
1028         switch (bb->last_ins->opcode) {
1029         case OP_BR:
1030         case OP_BR_REG:
1031         case CEE_BEQ:
1032         case CEE_BGE:
1033         case CEE_BGT:
1034         case CEE_BLE:
1035         case CEE_BLT:
1036         case CEE_BNE_UN:
1037         case CEE_BGE_UN:
1038         case CEE_BGT_UN:
1039         case CEE_BLE_UN:
1040         case CEE_BLT_UN:
1041         case OP_SWITCH:
1042                 mono_bblock_insert_before_ins (bb, bb->last_ins, inst);
1043                 break;
1044         default:
1045                 if (MONO_IS_COND_BRANCH_OP (bb->last_ins)) {
1046                         /* Need to insert the ins before the compare */
1047                         if (bb->code == bb->last_ins) {
1048                                 mono_bblock_insert_before_ins (bb, bb->last_ins, inst);
1049                                 return;
1050                         }
1051
1052                         if (bb->code->next == bb->last_ins) {
1053                                 /* Only two instructions */
1054                                 opcode = bb->code->opcode;
1055
1056                                 if ((opcode == OP_COMPARE) || (opcode == OP_COMPARE_IMM) || (opcode == OP_ICOMPARE) || (opcode == OP_ICOMPARE_IMM) || (opcode == OP_FCOMPARE) || (opcode == OP_LCOMPARE) || (opcode == OP_LCOMPARE_IMM) || (opcode == OP_RCOMPARE)) {
1057                                         /* NEW IR */
1058                                         mono_bblock_insert_before_ins (bb, bb->code, inst);
1059                                 } else {
1060                                         mono_bblock_insert_before_ins (bb, bb->last_ins, inst);
1061                                 }
1062                         } else {
1063                                 opcode = bb->last_ins->prev->opcode;
1064
1065                                 if ((opcode == OP_COMPARE) || (opcode == OP_COMPARE_IMM) || (opcode == OP_ICOMPARE) || (opcode == OP_ICOMPARE_IMM) || (opcode == OP_FCOMPARE) || (opcode == OP_LCOMPARE) || (opcode == OP_LCOMPARE_IMM) || (opcode == OP_RCOMPARE)) {
1066                                         /* NEW IR */
1067                                         mono_bblock_insert_before_ins (bb, bb->last_ins->prev, inst);
1068                                 } else {
1069                                         mono_bblock_insert_before_ins (bb, bb->last_ins, inst);
1070                                 }
1071                         }
1072                 }
1073                 else
1074                         MONO_ADD_INS (bb, inst);
1075                 break;
1076         }
1077 }
1078
1079 void
1080 mono_create_jump_table (MonoCompile *cfg, MonoInst *label, MonoBasicBlock **bbs, int num_blocks)
1081 {
1082         MonoJumpInfo *ji = (MonoJumpInfo *)mono_mempool_alloc (cfg->mempool, sizeof (MonoJumpInfo));
1083         MonoJumpInfoBBTable *table;
1084
1085         table = (MonoJumpInfoBBTable *)mono_mempool_alloc (cfg->mempool, sizeof (MonoJumpInfoBBTable));
1086         table->table = bbs;
1087         table->table_size = num_blocks;
1088
1089         ji->ip.label = label;
1090         ji->type = MONO_PATCH_INFO_SWITCH;
1091         ji->data.table = table;
1092         ji->next = cfg->patch_info;
1093         cfg->patch_info = ji;
1094 }
1095
1096 static MonoMethodSignature *
1097 mono_get_array_new_va_signature (int arity)
1098 {
1099         static GHashTable *sighash;
1100         MonoMethodSignature *res;
1101         int i;
1102
1103         mono_jit_lock ();
1104         if (!sighash) {
1105                 sighash = g_hash_table_new (NULL, NULL);
1106         }
1107         else if ((res = (MonoMethodSignature *)g_hash_table_lookup (sighash, GINT_TO_POINTER (arity)))) {
1108                 mono_jit_unlock ();
1109                 return res;
1110         }
1111
1112         res = mono_metadata_signature_alloc (mono_defaults.corlib, arity + 1);
1113
1114         res->pinvoke = 1;
1115         if (ARCH_VARARG_ICALLS)
1116                 /* Only set this only some archs since not all backends can handle varargs+pinvoke */
1117                 res->call_convention = MONO_CALL_VARARG;
1118
1119 #ifdef TARGET_WIN32
1120         res->call_convention = MONO_CALL_C;
1121 #endif
1122
1123         res->params [0] = &mono_defaults.int_class->byval_arg;
1124         for (i = 0; i < arity; i++)
1125                 res->params [i + 1] = &mono_defaults.int_class->byval_arg;
1126
1127         res->ret = &mono_defaults.object_class->byval_arg;
1128
1129         g_hash_table_insert (sighash, GINT_TO_POINTER (arity), res);
1130         mono_jit_unlock ();
1131
1132         return res;
1133 }
1134
1135 MonoJitICallInfo *
1136 mono_get_array_new_va_icall (int rank)
1137 {
1138         MonoMethodSignature *esig;
1139         char icall_name [256];
1140         char *name;
1141         MonoJitICallInfo *info;
1142
1143         /* Need to register the icall so it gets an icall wrapper */
1144         sprintf (icall_name, "ves_array_new_va_%d", rank);
1145
1146         mono_jit_lock ();
1147         info = mono_find_jit_icall_by_name (icall_name);
1148         if (info == NULL) {
1149                 esig = mono_get_array_new_va_signature (rank);
1150                 name = g_strdup (icall_name);
1151                 info = mono_register_jit_icall (mono_array_new_va, name, esig, FALSE);
1152         }
1153         mono_jit_unlock ();
1154
1155         return info;
1156 }
1157
1158 gboolean
1159 mini_class_is_system_array (MonoClass *klass)
1160 {
1161         if (klass->parent == mono_defaults.array_class)
1162                 return TRUE;
1163         else
1164                 return FALSE;
1165 }
1166
1167 gboolean
1168 mini_assembly_can_skip_verification (MonoDomain *domain, MonoMethod *method)
1169 {
1170         MonoAssembly *assembly = method->klass->image->assembly;
1171         if (method->wrapper_type != MONO_WRAPPER_NONE && method->wrapper_type != MONO_WRAPPER_DYNAMIC_METHOD)
1172                 return FALSE;
1173         if (assembly->in_gac || assembly->image == mono_defaults.corlib)
1174                 return FALSE;
1175         return mono_assembly_has_skip_verification (assembly);
1176 }
1177
1178 /*
1179  * mini_method_verify:
1180  *
1181  * Verify the method using the new verfier.
1182  *
1183  * Returns true if the method is invalid.
1184  */
1185 static gboolean
1186 mini_method_verify (MonoCompile *cfg, MonoMethod *method, gboolean fail_compile)
1187 {
1188         GSList *tmp, *res;
1189         gboolean is_fulltrust;
1190         MonoLoaderError *error;
1191
1192         if (method->verification_success)
1193                 return FALSE;
1194
1195         if (!mono_verifier_is_enabled_for_method (method))
1196                 return FALSE;
1197
1198         /*skip verification implies the assembly must be */
1199         is_fulltrust = mono_verifier_is_method_full_trust (method) ||  mini_assembly_can_skip_verification (cfg->domain, method);
1200
1201         res = mono_method_verify_with_current_settings (method, cfg->skip_visibility, is_fulltrust);
1202
1203         if ((error = mono_loader_get_last_error ())) {
1204                 if (fail_compile)
1205                         cfg->exception_type = error->exception_type;
1206                 else
1207                         mono_loader_clear_error ();
1208                 if (res)
1209                         mono_free_verify_list (res);
1210                 return TRUE;
1211         }
1212
1213         if (res) {
1214                 for (tmp = res; tmp; tmp = tmp->next) {
1215                         MonoVerifyInfoExtended *info = (MonoVerifyInfoExtended *)tmp->data;
1216                         if (info->info.status == MONO_VERIFY_ERROR) {
1217                                 if (fail_compile) {
1218                                 char *method_name = mono_method_full_name (method, TRUE);
1219                                         cfg->exception_type = info->exception_type;
1220                                         cfg->exception_message = g_strdup_printf ("Error verifying %s: %s", method_name, info->info.message);
1221                                         g_free (method_name);
1222                                 }
1223                                 mono_free_verify_list (res);
1224                                 return TRUE;
1225                         }
1226                         if (info->info.status == MONO_VERIFY_NOT_VERIFIABLE && (!is_fulltrust || info->exception_type == MONO_EXCEPTION_METHOD_ACCESS || info->exception_type == MONO_EXCEPTION_FIELD_ACCESS)) {
1227                                 if (fail_compile) {
1228                                         char *method_name = mono_method_full_name (method, TRUE);
1229                                         cfg->exception_type = info->exception_type;
1230                                         cfg->exception_message = g_strdup_printf ("Error verifying %s: %s", method_name, info->info.message);
1231                                         g_free (method_name);
1232                                 }
1233                                 mono_free_verify_list (res);
1234                                 return TRUE;
1235                         }
1236                 }
1237                 mono_free_verify_list (res);
1238         }
1239         method->verification_success = 1;
1240         return FALSE;
1241 }
1242
1243 /*Returns true if something went wrong*/
1244 gboolean
1245 mono_compile_is_broken (MonoCompile *cfg, MonoMethod *method, gboolean fail_compile)
1246 {
1247         MonoMethod *method_definition = method;
1248         gboolean dont_verify = method->klass->image->assembly->corlib_internal;
1249
1250         while (method_definition->is_inflated) {
1251                 MonoMethodInflated *imethod = (MonoMethodInflated *) method_definition;
1252                 method_definition = imethod->declaring;
1253         }
1254
1255         return !dont_verify && mini_method_verify (cfg, method_definition, fail_compile);
1256 }
1257
1258 static void
1259 mono_dynamic_code_hash_insert (MonoDomain *domain, MonoMethod *method, MonoJitDynamicMethodInfo *ji)
1260 {
1261         if (!domain_jit_info (domain)->dynamic_code_hash)
1262                 domain_jit_info (domain)->dynamic_code_hash = g_hash_table_new (NULL, NULL);
1263         g_hash_table_insert (domain_jit_info (domain)->dynamic_code_hash, method, ji);
1264 }
1265
1266 static MonoJitDynamicMethodInfo*
1267 mono_dynamic_code_hash_lookup (MonoDomain *domain, MonoMethod *method)
1268 {
1269         MonoJitDynamicMethodInfo *res;
1270
1271         if (domain_jit_info (domain)->dynamic_code_hash)
1272                 res = (MonoJitDynamicMethodInfo *)g_hash_table_lookup (domain_jit_info (domain)->dynamic_code_hash, method);
1273         else
1274                 res = NULL;
1275         return res;
1276 }
1277
1278 typedef struct {
1279         MonoClass *vtype;
1280         GList *active, *inactive;
1281         GSList *slots;
1282 } StackSlotInfo;
1283
1284 static gint
1285 compare_by_interval_start_pos_func (gconstpointer a, gconstpointer b)
1286 {
1287         MonoMethodVar *v1 = (MonoMethodVar*)a;
1288         MonoMethodVar *v2 = (MonoMethodVar*)b;
1289
1290         if (v1 == v2)
1291                 return 0;
1292         else if (v1->interval->range && v2->interval->range)
1293                 return v1->interval->range->from - v2->interval->range->from;
1294         else if (v1->interval->range)
1295                 return -1;
1296         else
1297                 return 1;
1298 }
1299
1300 #if 0
1301 #define LSCAN_DEBUG(a) do { a; } while (0)
1302 #else
1303 #define LSCAN_DEBUG(a)
1304 #endif
1305
1306 static gint32*
1307 mono_allocate_stack_slots2 (MonoCompile *cfg, gboolean backward, guint32 *stack_size, guint32 *stack_align)
1308 {
1309         int i, slot, offset, size;
1310         guint32 align;
1311         MonoMethodVar *vmv;
1312         MonoInst *inst;
1313         gint32 *offsets;
1314         GList *vars = NULL, *l, *unhandled;
1315         StackSlotInfo *scalar_stack_slots, *vtype_stack_slots, *slot_info;
1316         MonoType *t;
1317         int nvtypes;
1318         gboolean reuse_slot;
1319
1320         LSCAN_DEBUG (printf ("Allocate Stack Slots 2 for %s:\n", mono_method_full_name (cfg->method, TRUE)));
1321
1322         scalar_stack_slots = (StackSlotInfo *)mono_mempool_alloc0 (cfg->mempool, sizeof (StackSlotInfo) * MONO_TYPE_PINNED);
1323         vtype_stack_slots = NULL;
1324         nvtypes = 0;
1325
1326         offsets = (gint32 *)mono_mempool_alloc (cfg->mempool, sizeof (gint32) * cfg->num_varinfo);
1327         for (i = 0; i < cfg->num_varinfo; ++i)
1328                 offsets [i] = -1;
1329
1330         for (i = cfg->locals_start; i < cfg->num_varinfo; i++) {
1331                 inst = cfg->varinfo [i];
1332                 vmv = MONO_VARINFO (cfg, i);
1333
1334                 if ((inst->flags & MONO_INST_IS_DEAD) || inst->opcode == OP_REGVAR || inst->opcode == OP_REGOFFSET)
1335                         continue;
1336
1337                 vars = g_list_prepend (vars, vmv);
1338         }
1339
1340         vars = g_list_sort (g_list_copy (vars), compare_by_interval_start_pos_func);
1341
1342         /* Sanity check */
1343         /*
1344         i = 0;
1345         for (unhandled = vars; unhandled; unhandled = unhandled->next) {
1346                 MonoMethodVar *current = unhandled->data;
1347
1348                 if (current->interval->range) {
1349                         g_assert (current->interval->range->from >= i);
1350                         i = current->interval->range->from;
1351                 }
1352         }
1353         */
1354
1355         offset = 0;
1356         *stack_align = 0;
1357         for (unhandled = vars; unhandled; unhandled = unhandled->next) {
1358                 MonoMethodVar *current = (MonoMethodVar *)unhandled->data;
1359
1360                 vmv = current;
1361                 inst = cfg->varinfo [vmv->idx];
1362
1363                 t = mono_type_get_underlying_type (inst->inst_vtype);
1364                 if (cfg->gsharedvt && mini_is_gsharedvt_variable_type (t))
1365                         continue;
1366
1367                 /* inst->backend.is_pinvoke indicates native sized value types, this is used by the
1368                 * pinvoke wrappers when they call functions returning structures */
1369                 if (inst->backend.is_pinvoke && MONO_TYPE_ISSTRUCT (t) && t->type != MONO_TYPE_TYPEDBYREF) {
1370                         size = mono_class_native_size (mono_class_from_mono_type (t), &align);
1371                 }
1372                 else {
1373                         int ialign;
1374
1375                         size = mini_type_stack_size (t, &ialign);
1376                         align = ialign;
1377
1378                         if (MONO_CLASS_IS_SIMD (cfg, mono_class_from_mono_type (t)))
1379                                 align = 16;
1380                 }
1381
1382                 reuse_slot = TRUE;
1383                 if (cfg->disable_reuse_stack_slots)
1384                         reuse_slot = FALSE;
1385
1386                 t = mini_get_underlying_type (t);
1387                 switch (t->type) {
1388                 case MONO_TYPE_GENERICINST:
1389                         if (!mono_type_generic_inst_is_valuetype (t)) {
1390                                 slot_info = &scalar_stack_slots [t->type];
1391                                 break;
1392                         }
1393                         /* Fall through */
1394                 case MONO_TYPE_VALUETYPE:
1395                         if (!vtype_stack_slots)
1396                                 vtype_stack_slots = (StackSlotInfo *)mono_mempool_alloc0 (cfg->mempool, sizeof (StackSlotInfo) * 256);
1397                         for (i = 0; i < nvtypes; ++i)
1398                                 if (t->data.klass == vtype_stack_slots [i].vtype)
1399                                         break;
1400                         if (i < nvtypes)
1401                                 slot_info = &vtype_stack_slots [i];
1402                         else {
1403                                 g_assert (nvtypes < 256);
1404                                 vtype_stack_slots [nvtypes].vtype = t->data.klass;
1405                                 slot_info = &vtype_stack_slots [nvtypes];
1406                                 nvtypes ++;
1407                         }
1408                         if (cfg->disable_reuse_ref_stack_slots)
1409                                 reuse_slot = FALSE;
1410                         break;
1411
1412                 case MONO_TYPE_PTR:
1413                 case MONO_TYPE_I:
1414                 case MONO_TYPE_U:
1415 #if SIZEOF_VOID_P == 4
1416                 case MONO_TYPE_I4:
1417 #else
1418                 case MONO_TYPE_I8:
1419 #endif
1420                         if (cfg->disable_ref_noref_stack_slot_share) {
1421                                 slot_info = &scalar_stack_slots [MONO_TYPE_I];
1422                                 break;
1423                         }
1424                         /* Fall through */
1425
1426                 case MONO_TYPE_CLASS:
1427                 case MONO_TYPE_OBJECT:
1428                 case MONO_TYPE_ARRAY:
1429                 case MONO_TYPE_SZARRAY:
1430                 case MONO_TYPE_STRING:
1431                         /* Share non-float stack slots of the same size */
1432                         slot_info = &scalar_stack_slots [MONO_TYPE_CLASS];
1433                         if (cfg->disable_reuse_ref_stack_slots)
1434                                 reuse_slot = FALSE;
1435                         break;
1436
1437                 default:
1438                         slot_info = &scalar_stack_slots [t->type];
1439                 }
1440
1441                 slot = 0xffffff;
1442                 if (cfg->comp_done & MONO_COMP_LIVENESS) {
1443                         int pos;
1444                         gboolean changed;
1445
1446                         //printf ("START  %2d %08x %08x\n",  vmv->idx, vmv->range.first_use.abs_pos, vmv->range.last_use.abs_pos);
1447
1448                         if (!current->interval->range) {
1449                                 if (inst->flags & (MONO_INST_VOLATILE|MONO_INST_INDIRECT))
1450                                         pos = ~0;
1451                                 else {
1452                                         /* Dead */
1453                                         inst->flags |= MONO_INST_IS_DEAD;
1454                                         continue;
1455                                 }
1456                         }
1457                         else
1458                                 pos = current->interval->range->from;
1459
1460                         LSCAN_DEBUG (printf ("process R%d ", inst->dreg));
1461                         if (current->interval->range)
1462                                 LSCAN_DEBUG (mono_linterval_print (current->interval));
1463                         LSCAN_DEBUG (printf ("\n"));
1464
1465                         /* Check for intervals in active which expired or inactive */
1466                         changed = TRUE;
1467                         /* FIXME: Optimize this */
1468                         while (changed) {
1469                                 changed = FALSE;
1470                                 for (l = slot_info->active; l != NULL; l = l->next) {
1471                                         MonoMethodVar *v = (MonoMethodVar*)l->data;
1472
1473                                         if (v->interval->last_range->to < pos) {
1474                                                 slot_info->active = g_list_delete_link (slot_info->active, l);
1475                                                 slot_info->slots = g_slist_prepend_mempool (cfg->mempool, slot_info->slots, GINT_TO_POINTER (offsets [v->idx]));
1476                                                 LSCAN_DEBUG (printf ("Interval R%d has expired, adding 0x%x to slots\n", cfg->varinfo [v->idx]->dreg, offsets [v->idx]));
1477                                                 changed = TRUE;
1478                                                 break;
1479                                         }
1480                                         else if (!mono_linterval_covers (v->interval, pos)) {
1481                                                 slot_info->inactive = g_list_append (slot_info->inactive, v);
1482                                                 slot_info->active = g_list_delete_link (slot_info->active, l);
1483                                                 LSCAN_DEBUG (printf ("Interval R%d became inactive\n", cfg->varinfo [v->idx]->dreg));
1484                                                 changed = TRUE;
1485                                                 break;
1486                                         }
1487                                 }
1488                         }
1489
1490                         /* Check for intervals in inactive which expired or active */
1491                         changed = TRUE;
1492                         /* FIXME: Optimize this */
1493                         while (changed) {
1494                                 changed = FALSE;
1495                                 for (l = slot_info->inactive; l != NULL; l = l->next) {
1496                                         MonoMethodVar *v = (MonoMethodVar*)l->data;
1497
1498                                         if (v->interval->last_range->to < pos) {
1499                                                 slot_info->inactive = g_list_delete_link (slot_info->inactive, l);
1500                                                 // FIXME: Enabling this seems to cause impossible to debug crashes
1501                                                 //slot_info->slots = g_slist_prepend_mempool (cfg->mempool, slot_info->slots, GINT_TO_POINTER (offsets [v->idx]));
1502                                                 LSCAN_DEBUG (printf ("Interval R%d has expired, adding 0x%x to slots\n", cfg->varinfo [v->idx]->dreg, offsets [v->idx]));
1503                                                 changed = TRUE;
1504                                                 break;
1505                                         }
1506                                         else if (mono_linterval_covers (v->interval, pos)) {
1507                                                 slot_info->active = g_list_append (slot_info->active, v);
1508                                                 slot_info->inactive = g_list_delete_link (slot_info->inactive, l);
1509                                                 LSCAN_DEBUG (printf ("\tInterval R%d became active\n", cfg->varinfo [v->idx]->dreg));
1510                                                 changed = TRUE;
1511                                                 break;
1512                                         }
1513                                 }
1514                         }
1515
1516                         /*
1517                          * This also handles the case when the variable is used in an
1518                          * exception region, as liveness info is not computed there.
1519                          */
1520                         /*
1521                          * FIXME: All valuetypes are marked as INDIRECT because of LDADDR
1522                          * opcodes.
1523                          */
1524                         if (! (inst->flags & (MONO_INST_VOLATILE|MONO_INST_INDIRECT))) {
1525                                 if (slot_info->slots) {
1526                                         slot = GPOINTER_TO_INT (slot_info->slots->data);
1527
1528                                         slot_info->slots = slot_info->slots->next;
1529                                 }
1530
1531                                 /* FIXME: We might want to consider the inactive intervals as well if slot_info->slots is empty */
1532
1533                                 slot_info->active = mono_varlist_insert_sorted (cfg, slot_info->active, vmv, TRUE);
1534                         }
1535                 }
1536
1537 #if 0
1538                 {
1539                         static int count = 0;
1540                         count ++;
1541
1542                         if (count == atoi (g_getenv ("COUNT3")))
1543                                 printf ("LAST: %s\n", mono_method_full_name (cfg->method, TRUE));
1544                         if (count > atoi (g_getenv ("COUNT3")))
1545                                 slot = 0xffffff;
1546                         else {
1547                                 mono_print_ins (inst);
1548                                 }
1549                 }
1550 #endif
1551
1552                 LSCAN_DEBUG (printf ("R%d %s -> 0x%x\n", inst->dreg, mono_type_full_name (t), slot));
1553
1554                 if (inst->flags & MONO_INST_LMF) {
1555                         size = sizeof (MonoLMF);
1556                         align = sizeof (mgreg_t);
1557                         reuse_slot = FALSE;
1558                 }
1559
1560                 if (!reuse_slot)
1561                         slot = 0xffffff;
1562
1563                 if (slot == 0xffffff) {
1564                         /*
1565                          * Allways allocate valuetypes to sizeof (gpointer) to allow more
1566                          * efficient copying (and to work around the fact that OP_MEMCPY
1567                          * and OP_MEMSET ignores alignment).
1568                          */
1569                         if (MONO_TYPE_ISSTRUCT (t)) {
1570                                 align = MAX (align, sizeof (gpointer));
1571                                 align = MAX (align, mono_class_min_align (mono_class_from_mono_type (t)));
1572                         }
1573
1574                         if (backward) {
1575                                 offset += size;
1576                                 offset += align - 1;
1577                                 offset &= ~(align - 1);
1578                                 slot = offset;
1579                         }
1580                         else {
1581                                 offset += align - 1;
1582                                 offset &= ~(align - 1);
1583                                 slot = offset;
1584                                 offset += size;
1585                         }
1586
1587                         if (*stack_align == 0)
1588                                 *stack_align = align;
1589                 }
1590
1591                 offsets [vmv->idx] = slot;
1592         }
1593         g_list_free (vars);
1594         for (i = 0; i < MONO_TYPE_PINNED; ++i) {
1595                 if (scalar_stack_slots [i].active)
1596                         g_list_free (scalar_stack_slots [i].active);
1597         }
1598         for (i = 0; i < nvtypes; ++i) {
1599                 if (vtype_stack_slots [i].active)
1600                         g_list_free (vtype_stack_slots [i].active);
1601         }
1602
1603         cfg->stat_locals_stack_size += offset;
1604
1605         *stack_size = offset;
1606         return offsets;
1607 }
1608
1609 /*
1610  *  mono_allocate_stack_slots:
1611  *
1612  *  Allocate stack slots for all non register allocated variables using a
1613  * linear scan algorithm.
1614  * Returns: an array of stack offsets.
1615  * STACK_SIZE is set to the amount of stack space needed.
1616  * STACK_ALIGN is set to the alignment needed by the locals area.
1617  */
1618 gint32*
1619 mono_allocate_stack_slots (MonoCompile *cfg, gboolean backward, guint32 *stack_size, guint32 *stack_align)
1620 {
1621         int i, slot, offset, size;
1622         guint32 align;
1623         MonoMethodVar *vmv;
1624         MonoInst *inst;
1625         gint32 *offsets;
1626         GList *vars = NULL, *l;
1627         StackSlotInfo *scalar_stack_slots, *vtype_stack_slots, *slot_info;
1628         MonoType *t;
1629         int nvtypes;
1630         gboolean reuse_slot;
1631
1632         if ((cfg->num_varinfo > 0) && MONO_VARINFO (cfg, 0)->interval)
1633                 return mono_allocate_stack_slots2 (cfg, backward, stack_size, stack_align);
1634
1635         scalar_stack_slots = (StackSlotInfo *)mono_mempool_alloc0 (cfg->mempool, sizeof (StackSlotInfo) * MONO_TYPE_PINNED);
1636         vtype_stack_slots = NULL;
1637         nvtypes = 0;
1638
1639         offsets = (gint32 *)mono_mempool_alloc (cfg->mempool, sizeof (gint32) * cfg->num_varinfo);
1640         for (i = 0; i < cfg->num_varinfo; ++i)
1641                 offsets [i] = -1;
1642
1643         for (i = cfg->locals_start; i < cfg->num_varinfo; i++) {
1644                 inst = cfg->varinfo [i];
1645                 vmv = MONO_VARINFO (cfg, i);
1646
1647                 if ((inst->flags & MONO_INST_IS_DEAD) || inst->opcode == OP_REGVAR || inst->opcode == OP_REGOFFSET)
1648                         continue;
1649
1650                 vars = g_list_prepend (vars, vmv);
1651         }
1652
1653         vars = mono_varlist_sort (cfg, vars, 0);
1654         offset = 0;
1655         *stack_align = sizeof(mgreg_t);
1656         for (l = vars; l; l = l->next) {
1657                 vmv = (MonoMethodVar *)l->data;
1658                 inst = cfg->varinfo [vmv->idx];
1659
1660                 t = mono_type_get_underlying_type (inst->inst_vtype);
1661                 if (cfg->gsharedvt && mini_is_gsharedvt_variable_type (t))
1662                         continue;
1663
1664                 /* inst->backend.is_pinvoke indicates native sized value types, this is used by the
1665                 * pinvoke wrappers when they call functions returning structures */
1666                 if (inst->backend.is_pinvoke && MONO_TYPE_ISSTRUCT (t) && t->type != MONO_TYPE_TYPEDBYREF) {
1667                         size = mono_class_native_size (mono_class_from_mono_type (t), &align);
1668                 } else {
1669                         int ialign;
1670
1671                         size = mini_type_stack_size (t, &ialign);
1672                         align = ialign;
1673
1674                         if (mono_class_from_mono_type (t)->exception_type)
1675                                 mono_cfg_set_exception (cfg, MONO_EXCEPTION_TYPE_LOAD);
1676
1677                         if (MONO_CLASS_IS_SIMD (cfg, mono_class_from_mono_type (t)))
1678                                 align = 16;
1679                 }
1680
1681                 reuse_slot = TRUE;
1682                 if (cfg->disable_reuse_stack_slots)
1683                         reuse_slot = FALSE;
1684
1685                 t = mini_get_underlying_type (t);
1686                 switch (t->type) {
1687                 case MONO_TYPE_GENERICINST:
1688                         if (!mono_type_generic_inst_is_valuetype (t)) {
1689                                 slot_info = &scalar_stack_slots [t->type];
1690                                 break;
1691                         }
1692                         /* Fall through */
1693                 case MONO_TYPE_VALUETYPE:
1694                         if (!vtype_stack_slots)
1695                                 vtype_stack_slots = (StackSlotInfo *)mono_mempool_alloc0 (cfg->mempool, sizeof (StackSlotInfo) * 256);
1696                         for (i = 0; i < nvtypes; ++i)
1697                                 if (t->data.klass == vtype_stack_slots [i].vtype)
1698                                         break;
1699                         if (i < nvtypes)
1700                                 slot_info = &vtype_stack_slots [i];
1701                         else {
1702                                 g_assert (nvtypes < 256);
1703                                 vtype_stack_slots [nvtypes].vtype = t->data.klass;
1704                                 slot_info = &vtype_stack_slots [nvtypes];
1705                                 nvtypes ++;
1706                         }
1707                         if (cfg->disable_reuse_ref_stack_slots)
1708                                 reuse_slot = FALSE;
1709                         break;
1710
1711                 case MONO_TYPE_PTR:
1712                 case MONO_TYPE_I:
1713                 case MONO_TYPE_U:
1714 #if SIZEOF_VOID_P == 4
1715                 case MONO_TYPE_I4:
1716 #else
1717                 case MONO_TYPE_I8:
1718 #endif
1719                         if (cfg->disable_ref_noref_stack_slot_share) {
1720                                 slot_info = &scalar_stack_slots [MONO_TYPE_I];
1721                                 break;
1722                         }
1723                         /* Fall through */
1724
1725                 case MONO_TYPE_CLASS:
1726                 case MONO_TYPE_OBJECT:
1727                 case MONO_TYPE_ARRAY:
1728                 case MONO_TYPE_SZARRAY:
1729                 case MONO_TYPE_STRING:
1730                         /* Share non-float stack slots of the same size */
1731                         slot_info = &scalar_stack_slots [MONO_TYPE_CLASS];
1732                         if (cfg->disable_reuse_ref_stack_slots)
1733                                 reuse_slot = FALSE;
1734                         break;
1735                 case MONO_TYPE_VAR:
1736                 case MONO_TYPE_MVAR:
1737                         slot_info = &scalar_stack_slots [t->type];
1738                         break;
1739                 default:
1740                         slot_info = &scalar_stack_slots [t->type];
1741                         break;
1742                 }
1743
1744                 slot = 0xffffff;
1745                 if (cfg->comp_done & MONO_COMP_LIVENESS) {
1746                         //printf ("START  %2d %08x %08x\n",  vmv->idx, vmv->range.first_use.abs_pos, vmv->range.last_use.abs_pos);
1747
1748                         /* expire old intervals in active */
1749                         while (slot_info->active) {
1750                                 MonoMethodVar *amv = (MonoMethodVar *)slot_info->active->data;
1751
1752                                 if (amv->range.last_use.abs_pos > vmv->range.first_use.abs_pos)
1753                                         break;
1754
1755                                 //printf ("EXPIR  %2d %08x %08x C%d R%d\n", amv->idx, amv->range.first_use.abs_pos, amv->range.last_use.abs_pos, amv->spill_costs, amv->reg);
1756
1757                                 slot_info->active = g_list_delete_link (slot_info->active, slot_info->active);
1758                                 slot_info->slots = g_slist_prepend_mempool (cfg->mempool, slot_info->slots, GINT_TO_POINTER (offsets [amv->idx]));
1759                         }
1760
1761                         /*
1762                          * This also handles the case when the variable is used in an
1763                          * exception region, as liveness info is not computed there.
1764                          */
1765                         /*
1766                          * FIXME: All valuetypes are marked as INDIRECT because of LDADDR
1767                          * opcodes.
1768                          */
1769                         if (! (inst->flags & (MONO_INST_VOLATILE|MONO_INST_INDIRECT))) {
1770                                 if (slot_info->slots) {
1771                                         slot = GPOINTER_TO_INT (slot_info->slots->data);
1772
1773                                         slot_info->slots = slot_info->slots->next;
1774                                 }
1775
1776                                 slot_info->active = mono_varlist_insert_sorted (cfg, slot_info->active, vmv, TRUE);
1777                         }
1778                 }
1779
1780                 {
1781                         static int count = 0;
1782                         count ++;
1783
1784                         /*
1785                         if (count == atoi (g_getenv ("COUNT")))
1786                                 printf ("LAST: %s\n", mono_method_full_name (cfg->method, TRUE));
1787                         if (count > atoi (g_getenv ("COUNT")))
1788                                 slot = 0xffffff;
1789                         else {
1790                                 mono_print_ins (inst);
1791                                 }
1792                         */
1793                 }
1794
1795                 if (inst->flags & MONO_INST_LMF) {
1796                         /*
1797                          * This variable represents a MonoLMF structure, which has no corresponding
1798                          * CLR type, so hard-code its size/alignment.
1799                          */
1800                         size = sizeof (MonoLMF);
1801                         align = sizeof (mgreg_t);
1802                         reuse_slot = FALSE;
1803                 }
1804
1805                 if (!reuse_slot)
1806                         slot = 0xffffff;
1807
1808                 if (slot == 0xffffff) {
1809                         /*
1810                          * Allways allocate valuetypes to sizeof (gpointer) to allow more
1811                          * efficient copying (and to work around the fact that OP_MEMCPY
1812                          * and OP_MEMSET ignores alignment).
1813                          */
1814                         if (MONO_TYPE_ISSTRUCT (t)) {
1815                                 align = MAX (align, sizeof (gpointer));
1816                                 align = MAX (align, mono_class_min_align (mono_class_from_mono_type (t)));
1817                                 /*
1818                                  * Align the size too so the code generated for passing vtypes in
1819                                  * registers doesn't overwrite random locals.
1820                                  */
1821                                 size = (size + (align - 1)) & ~(align -1);
1822                         }
1823
1824                         if (backward) {
1825                                 offset += size;
1826                                 offset += align - 1;
1827                                 offset &= ~(align - 1);
1828                                 slot = offset;
1829                         }
1830                         else {
1831                                 offset += align - 1;
1832                                 offset &= ~(align - 1);
1833                                 slot = offset;
1834                                 offset += size;
1835                         }
1836
1837                         *stack_align = MAX (*stack_align, align);
1838                 }
1839
1840                 offsets [vmv->idx] = slot;
1841         }
1842         g_list_free (vars);
1843         for (i = 0; i < MONO_TYPE_PINNED; ++i) {
1844                 if (scalar_stack_slots [i].active)
1845                         g_list_free (scalar_stack_slots [i].active);
1846         }
1847         for (i = 0; i < nvtypes; ++i) {
1848                 if (vtype_stack_slots [i].active)
1849                         g_list_free (vtype_stack_slots [i].active);
1850         }
1851
1852         cfg->stat_locals_stack_size += offset;
1853
1854         *stack_size = offset;
1855         return offsets;
1856 }
1857
1858 #define EMUL_HIT_SHIFT 3
1859 #define EMUL_HIT_MASK ((1 << EMUL_HIT_SHIFT) - 1)
1860 /* small hit bitmap cache */
1861 static mono_byte emul_opcode_hit_cache [(OP_LAST>>EMUL_HIT_SHIFT) + 1] = {0};
1862 static short emul_opcode_num = 0;
1863 static short emul_opcode_alloced = 0;
1864 static short *emul_opcode_opcodes;
1865 static MonoJitICallInfo **emul_opcode_map;
1866
1867 MonoJitICallInfo *
1868 mono_find_jit_opcode_emulation (int opcode)
1869 {
1870         g_assert (opcode >= 0 && opcode <= OP_LAST);
1871         if (emul_opcode_hit_cache [opcode >> (EMUL_HIT_SHIFT + 3)] & (1 << (opcode & EMUL_HIT_MASK))) {
1872                 int i;
1873                 for (i = 0; i < emul_opcode_num; ++i) {
1874                         if (emul_opcode_opcodes [i] == opcode)
1875                                 return emul_opcode_map [i];
1876                 }
1877         }
1878         return NULL;
1879 }
1880
1881 void
1882 mini_register_opcode_emulation (int opcode, const char *name, const char *sigstr, gpointer func, const char *symbol, gboolean no_throw)
1883 {
1884         MonoJitICallInfo *info;
1885         MonoMethodSignature *sig = mono_create_icall_signature (sigstr);
1886
1887         g_assert (!sig->hasthis);
1888         g_assert (sig->param_count < 3);
1889
1890         /* Opcode emulation functions are assumed to don't call mono_raise_exception () */
1891         info = mono_register_jit_icall_full (func, name, sig, no_throw, TRUE, symbol);
1892
1893         if (emul_opcode_num >= emul_opcode_alloced) {
1894                 int incr = emul_opcode_alloced? emul_opcode_alloced/2: 16;
1895                 emul_opcode_alloced += incr;
1896                 emul_opcode_map = (MonoJitICallInfo **)g_realloc (emul_opcode_map, sizeof (emul_opcode_map [0]) * emul_opcode_alloced);
1897                 emul_opcode_opcodes = (short *)g_realloc (emul_opcode_opcodes, sizeof (emul_opcode_opcodes [0]) * emul_opcode_alloced);
1898         }
1899         emul_opcode_map [emul_opcode_num] = info;
1900         emul_opcode_opcodes [emul_opcode_num] = opcode;
1901         emul_opcode_num++;
1902         emul_opcode_hit_cache [opcode >> (EMUL_HIT_SHIFT + 3)] |= (1 << (opcode & EMUL_HIT_MASK));
1903 }
1904
1905 static void
1906 print_dfn (MonoCompile *cfg)
1907 {
1908         int i, j;
1909         char *code;
1910         MonoBasicBlock *bb;
1911         MonoInst *c;
1912
1913         {
1914                 char *method_name = mono_method_full_name (cfg->method, TRUE);
1915                 g_print ("IR code for method %s\n", method_name);
1916                 g_free (method_name);
1917         }
1918
1919         for (i = 0; i < cfg->num_bblocks; ++i) {
1920                 bb = cfg->bblocks [i];
1921                 /*if (bb->cil_code) {
1922                         char* code1, *code2;
1923                         code1 = mono_disasm_code_one (NULL, cfg->method, bb->cil_code, NULL);
1924                         if (bb->last_ins->cil_code)
1925                                 code2 = mono_disasm_code_one (NULL, cfg->method, bb->last_ins->cil_code, NULL);
1926                         else
1927                                 code2 = g_strdup ("");
1928
1929                         code1 [strlen (code1) - 1] = 0;
1930                         code = g_strdup_printf ("%s -> %s", code1, code2);
1931                         g_free (code1);
1932                         g_free (code2);
1933                 } else*/
1934                         code = g_strdup ("\n");
1935                 g_print ("\nBB%d (%d) (len: %d): %s", bb->block_num, i, bb->cil_length, code);
1936                 MONO_BB_FOR_EACH_INS (bb, c) {
1937                         mono_print_ins_index (-1, c);
1938                 }
1939
1940                 g_print ("\tprev:");
1941                 for (j = 0; j < bb->in_count; ++j) {
1942                         g_print (" BB%d", bb->in_bb [j]->block_num);
1943                 }
1944                 g_print ("\t\tsucc:");
1945                 for (j = 0; j < bb->out_count; ++j) {
1946                         g_print (" BB%d", bb->out_bb [j]->block_num);
1947                 }
1948                 g_print ("\n\tidom: BB%d\n", bb->idom? bb->idom->block_num: -1);
1949
1950                 if (bb->idom)
1951                         g_assert (mono_bitset_test_fast (bb->dominators, bb->idom->dfn));
1952
1953                 if (bb->dominators)
1954                         mono_blockset_print (cfg, bb->dominators, "\tdominators", bb->idom? bb->idom->dfn: -1);
1955                 if (bb->dfrontier)
1956                         mono_blockset_print (cfg, bb->dfrontier, "\tdfrontier", -1);
1957                 g_free (code);
1958         }
1959
1960         g_print ("\n");
1961 }
1962
1963 void
1964 mono_bblock_add_inst (MonoBasicBlock *bb, MonoInst *inst)
1965 {
1966         MONO_ADD_INS (bb, inst);
1967 }
1968
1969 void
1970 mono_bblock_insert_after_ins (MonoBasicBlock *bb, MonoInst *ins, MonoInst *ins_to_insert)
1971 {
1972         if (ins == NULL) {
1973                 ins = bb->code;
1974                 bb->code = ins_to_insert;
1975
1976                 /* Link with next */
1977                 ins_to_insert->next = ins;
1978                 if (ins)
1979                         ins->prev = ins_to_insert;
1980
1981                 if (bb->last_ins == NULL)
1982                         bb->last_ins = ins_to_insert;
1983         } else {
1984                 /* Link with next */
1985                 ins_to_insert->next = ins->next;
1986                 if (ins->next)
1987                         ins->next->prev = ins_to_insert;
1988
1989                 /* Link with previous */
1990                 ins->next = ins_to_insert;
1991                 ins_to_insert->prev = ins;
1992
1993                 if (bb->last_ins == ins)
1994                         bb->last_ins = ins_to_insert;
1995         }
1996 }
1997
1998 void
1999 mono_bblock_insert_before_ins (MonoBasicBlock *bb, MonoInst *ins, MonoInst *ins_to_insert)
2000 {
2001         if (ins == NULL) {
2002                 ins = bb->code;
2003                 if (ins)
2004                         ins->prev = ins_to_insert;
2005                 bb->code = ins_to_insert;
2006                 ins_to_insert->next = ins;
2007                 if (bb->last_ins == NULL)
2008                         bb->last_ins = ins_to_insert;
2009         } else {
2010                 /* Link with previous */
2011                 if (ins->prev)
2012                         ins->prev->next = ins_to_insert;
2013                 ins_to_insert->prev = ins->prev;
2014
2015                 /* Link with next */
2016                 ins->prev = ins_to_insert;
2017                 ins_to_insert->next = ins;
2018
2019                 if (bb->code == ins)
2020                         bb->code = ins_to_insert;
2021         }
2022 }
2023
2024 /*
2025  * mono_verify_bblock:
2026  *
2027  *   Verify that the next and prev pointers are consistent inside the instructions in BB.
2028  */
2029 void
2030 mono_verify_bblock (MonoBasicBlock *bb)
2031 {
2032         MonoInst *ins, *prev;
2033
2034         prev = NULL;
2035         for (ins = bb->code; ins; ins = ins->next) {
2036                 g_assert (ins->prev == prev);
2037                 prev = ins;
2038         }
2039         if (bb->last_ins)
2040                 g_assert (!bb->last_ins->next);
2041 }
2042
2043 /*
2044  * mono_verify_cfg:
2045  *
2046  *   Perform consistency checks on the JIT data structures and the IR
2047  */
2048 void
2049 mono_verify_cfg (MonoCompile *cfg)
2050 {
2051         MonoBasicBlock *bb;
2052
2053         for (bb = cfg->bb_entry; bb; bb = bb->next_bb)
2054                 mono_verify_bblock (bb);
2055 }
2056
2057 void
2058 mono_destroy_compile (MonoCompile *cfg)
2059 {
2060         GSList *l;
2061
2062         if (cfg->header)
2063                 mono_metadata_free_mh (cfg->header);
2064         //mono_mempool_stats (cfg->mempool);
2065         mono_free_loop_info (cfg);
2066         if (cfg->rs)
2067                 mono_regstate_free (cfg->rs);
2068         if (cfg->spvars)
2069                 g_hash_table_destroy (cfg->spvars);
2070         if (cfg->exvars)
2071                 g_hash_table_destroy (cfg->exvars);
2072         for (l = cfg->headers_to_free; l; l = l->next)
2073                 mono_metadata_free_mh ((MonoMethodHeader *)l->data);
2074         g_list_free (cfg->ldstr_list);
2075         g_hash_table_destroy (cfg->token_info_hash);
2076         if (cfg->abs_patches)
2077                 g_hash_table_destroy (cfg->abs_patches);
2078         mono_mempool_destroy (cfg->mempool);
2079
2080         mono_debug_free_method (cfg);
2081
2082         g_free (cfg->varinfo);
2083         g_free (cfg->vars);
2084         g_free (cfg->exception_message);
2085         g_free (cfg);
2086 }
2087
2088 static MonoInst*
2089 mono_create_tls_get_offset (MonoCompile *cfg, int offset)
2090 {
2091         MonoInst* ins;
2092
2093         if (!cfg->backend->have_tls_get)
2094                 return NULL;
2095
2096         if (offset == -1)
2097                 return NULL;
2098
2099         MONO_INST_NEW (cfg, ins, OP_TLS_GET);
2100         ins->dreg = mono_alloc_preg (cfg);
2101         ins->inst_offset = offset;
2102         return ins;
2103 }
2104
2105 gboolean
2106 mini_tls_get_supported (MonoCompile *cfg, MonoTlsKey key)
2107 {
2108         if (!cfg->backend->have_tls_get)
2109                 return FALSE;
2110
2111         if (cfg->compile_aot)
2112                 return cfg->backend->have_tls_get_reg;
2113         else
2114                 return mini_get_tls_offset (key) != -1;
2115 }
2116
2117 MonoInst*
2118 mono_create_tls_get (MonoCompile *cfg, MonoTlsKey key)
2119 {
2120         if (!cfg->backend->have_tls_get)
2121                 return NULL;
2122
2123         /*
2124          * TLS offsets might be different at AOT time, so load them from a GOT slot and
2125          * use a different opcode.
2126          */
2127         if (cfg->compile_aot) {
2128                 if (cfg->backend->have_tls_get_reg) {
2129                         MonoInst *ins, *c;
2130
2131                         EMIT_NEW_TLS_OFFSETCONST (cfg, c, key);
2132                         MONO_INST_NEW (cfg, ins, OP_TLS_GET_REG);
2133                         ins->dreg = mono_alloc_preg (cfg);
2134                         ins->sreg1 = c->dreg;
2135                         return ins;
2136                 } else {
2137                         return NULL;
2138                 }
2139         }
2140
2141         return mono_create_tls_get_offset (cfg, mini_get_tls_offset (key));
2142 }
2143
2144 MonoInst*
2145 mono_get_jit_tls_intrinsic (MonoCompile *cfg)
2146 {
2147         return mono_create_tls_get (cfg, TLS_KEY_JIT_TLS);
2148 }
2149
2150 MonoInst*
2151 mono_get_domain_intrinsic (MonoCompile* cfg)
2152 {
2153         return mono_create_tls_get (cfg, TLS_KEY_DOMAIN);
2154 }
2155
2156 MonoInst*
2157 mono_get_thread_intrinsic (MonoCompile* cfg)
2158 {
2159         return mono_create_tls_get (cfg, TLS_KEY_THREAD);
2160 }
2161
2162 MonoInst*
2163 mono_get_lmf_intrinsic (MonoCompile* cfg)
2164 {
2165         return mono_create_tls_get (cfg, TLS_KEY_LMF);
2166 }
2167
2168 MonoInst*
2169 mono_get_lmf_addr_intrinsic (MonoCompile* cfg)
2170 {
2171         return mono_create_tls_get (cfg, TLS_KEY_LMF_ADDR);
2172 }
2173
2174 void
2175 mono_add_patch_info (MonoCompile *cfg, int ip, MonoJumpInfoType type, gconstpointer target)
2176 {
2177         MonoJumpInfo *ji = (MonoJumpInfo *)mono_mempool_alloc0 (cfg->mempool, sizeof (MonoJumpInfo));
2178
2179         ji->ip.i = ip;
2180         ji->type = type;
2181         ji->data.target = target;
2182         ji->next = cfg->patch_info;
2183
2184         cfg->patch_info = ji;
2185 }
2186
2187 void
2188 mono_add_patch_info_rel (MonoCompile *cfg, int ip, MonoJumpInfoType type, gconstpointer target, int relocation)
2189 {
2190         MonoJumpInfo *ji = (MonoJumpInfo *)mono_mempool_alloc0 (cfg->mempool, sizeof (MonoJumpInfo));
2191
2192         ji->ip.i = ip;
2193         ji->type = type;
2194         ji->relocation = relocation;
2195         ji->data.target = target;
2196         ji->next = cfg->patch_info;
2197
2198         cfg->patch_info = ji;
2199 }
2200
2201 void
2202 mono_remove_patch_info (MonoCompile *cfg, int ip)
2203 {
2204         MonoJumpInfo **ji = &cfg->patch_info;
2205
2206         while (*ji) {
2207                 if ((*ji)->ip.i == ip)
2208                         *ji = (*ji)->next;
2209                 else
2210                         ji = &((*ji)->next);
2211         }
2212 }
2213
2214 void
2215 mono_add_seq_point (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst *ins, int native_offset)
2216 {
2217         ins->inst_offset = native_offset;
2218         g_ptr_array_add (cfg->seq_points, ins);
2219         if (bb) {
2220                 bb->seq_points = g_slist_prepend_mempool (cfg->mempool, bb->seq_points, ins);
2221                 bb->last_seq_point = ins;
2222         }
2223 }
2224
2225 void
2226 mono_add_var_location (MonoCompile *cfg, MonoInst *var, gboolean is_reg, int reg, int offset, int from, int to)
2227 {
2228         MonoDwarfLocListEntry *entry = (MonoDwarfLocListEntry *)mono_mempool_alloc0 (cfg->mempool, sizeof (MonoDwarfLocListEntry));
2229
2230         if (is_reg)
2231                 g_assert (offset == 0);
2232
2233         entry->is_reg = is_reg;
2234         entry->reg = reg;
2235         entry->offset = offset;
2236         entry->from = from;
2237         entry->to = to;
2238
2239         if (var == cfg->args [0])
2240                 cfg->this_loclist = g_slist_append_mempool (cfg->mempool, cfg->this_loclist, entry);
2241         else if (var == cfg->rgctx_var)
2242                 cfg->rgctx_loclist = g_slist_append_mempool (cfg->mempool, cfg->rgctx_loclist, entry);
2243 }
2244
2245 static void
2246 mono_compile_create_vars (MonoCompile *cfg)
2247 {
2248         MonoMethodSignature *sig;
2249         MonoMethodHeader *header;
2250         int i;
2251
2252         header = cfg->header;
2253
2254         sig = mono_method_signature (cfg->method);
2255
2256         if (!MONO_TYPE_IS_VOID (sig->ret)) {
2257                 cfg->ret = mono_compile_create_var (cfg, sig->ret, OP_ARG);
2258                 /* Inhibit optimizations */
2259                 cfg->ret->flags |= MONO_INST_VOLATILE;
2260         }
2261         if (cfg->verbose_level > 2)
2262                 g_print ("creating vars\n");
2263
2264         cfg->args = (MonoInst **)mono_mempool_alloc0 (cfg->mempool, (sig->param_count + sig->hasthis) * sizeof (MonoInst*));
2265
2266         if (sig->hasthis)
2267                 cfg->args [0] = mono_compile_create_var (cfg, &cfg->method->klass->this_arg, OP_ARG);
2268
2269         for (i = 0; i < sig->param_count; ++i) {
2270                 cfg->args [i + sig->hasthis] = mono_compile_create_var (cfg, sig->params [i], OP_ARG);
2271         }
2272
2273         if (cfg->verbose_level > 2) {
2274                 if (cfg->ret) {
2275                         printf ("\treturn : ");
2276                         mono_print_ins (cfg->ret);
2277                 }
2278
2279                 if (sig->hasthis) {
2280                         printf ("\tthis: ");
2281                         mono_print_ins (cfg->args [0]);
2282                 }
2283
2284                 for (i = 0; i < sig->param_count; ++i) {
2285                         printf ("\targ [%d]: ", i);
2286                         mono_print_ins (cfg->args [i + sig->hasthis]);
2287                 }
2288         }
2289
2290         cfg->locals_start = cfg->num_varinfo;
2291         cfg->locals = (MonoInst **)mono_mempool_alloc0 (cfg->mempool, header->num_locals * sizeof (MonoInst*));
2292
2293         if (cfg->verbose_level > 2)
2294                 g_print ("creating locals\n");
2295
2296         for (i = 0; i < header->num_locals; ++i)
2297                 cfg->locals [i] = mono_compile_create_var (cfg, header->locals [i], OP_LOCAL);
2298
2299         if (cfg->verbose_level > 2)
2300                 g_print ("locals done\n");
2301
2302 #ifdef ENABLE_LLVM
2303         if (COMPILE_LLVM (cfg))
2304                 mono_llvm_create_vars (cfg);
2305         else
2306                 mono_arch_create_vars (cfg);
2307 #else
2308         mono_arch_create_vars (cfg);
2309 #endif
2310
2311         if (cfg->method->save_lmf && cfg->create_lmf_var) {
2312                 MonoInst *lmf_var = mono_compile_create_var (cfg, &mono_defaults.int_class->byval_arg, OP_LOCAL);
2313                 lmf_var->flags |= MONO_INST_VOLATILE;
2314                 lmf_var->flags |= MONO_INST_LMF;
2315                 cfg->lmf_var = lmf_var;
2316         }
2317 }
2318
2319 void
2320 mono_print_code (MonoCompile *cfg, const char* msg)
2321 {
2322         MonoBasicBlock *bb;
2323
2324         for (bb = cfg->bb_entry; bb; bb = bb->next_bb)
2325                 mono_print_bb (bb, msg);
2326 }
2327
2328 static void
2329 mono_postprocess_patches (MonoCompile *cfg)
2330 {
2331         MonoJumpInfo *patch_info;
2332         int i;
2333
2334         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
2335                 switch (patch_info->type) {
2336                 case MONO_PATCH_INFO_ABS: {
2337                         MonoJitICallInfo *info = mono_find_jit_icall_by_addr (patch_info->data.target);
2338
2339                         /*
2340                          * Change patches of type MONO_PATCH_INFO_ABS into patches describing the
2341                          * absolute address.
2342                          */
2343                         if (info) {
2344                                 //printf ("TEST %s %p\n", info->name, patch_info->data.target);
2345                                 /* for these array methods we currently register the same function pointer
2346                                  * since it's a vararg function. But this means that mono_find_jit_icall_by_addr ()
2347                                  * will return the incorrect one depending on the order they are registered.
2348                                  * See tests/test-arr.cs
2349                                  */
2350                                 if (strstr (info->name, "ves_array_new_va_") == NULL && strstr (info->name, "ves_array_element_address_") == NULL) {
2351                                         patch_info->type = MONO_PATCH_INFO_INTERNAL_METHOD;
2352                                         patch_info->data.name = info->name;
2353                                 }
2354                         }
2355
2356                         if (patch_info->type == MONO_PATCH_INFO_ABS) {
2357                                 if (cfg->abs_patches) {
2358                                         MonoJumpInfo *abs_ji = (MonoJumpInfo *)g_hash_table_lookup (cfg->abs_patches, patch_info->data.target);
2359                                         if (abs_ji) {
2360                                                 patch_info->type = abs_ji->type;
2361                                                 patch_info->data.target = abs_ji->data.target;
2362                                         }
2363                                 }
2364                         }
2365
2366                         break;
2367                 }
2368                 case MONO_PATCH_INFO_SWITCH: {
2369                         gpointer *table;
2370 #if defined(__native_client__) && defined(__native_client_codegen__)
2371                         /* This memory will leak.  */
2372                         /* TODO: can we free this when  */
2373                         /* making the final jump table? */
2374                         table = g_malloc0 (sizeof(gpointer) * patch_info->data.table->table_size);
2375 #else
2376                         if (cfg->method->dynamic) {
2377                                 table = (void **)mono_code_manager_reserve (cfg->dynamic_info->code_mp, sizeof (gpointer) * patch_info->data.table->table_size);
2378                         } else {
2379                                 table = (void **)mono_domain_code_reserve (cfg->domain, sizeof (gpointer) * patch_info->data.table->table_size);
2380                         }
2381 #endif
2382
2383                         for (i = 0; i < patch_info->data.table->table_size; i++) {
2384                                 /* Might be NULL if the switch is eliminated */
2385                                 if (patch_info->data.table->table [i]) {
2386                                         g_assert (patch_info->data.table->table [i]->native_offset);
2387                                         table [i] = GINT_TO_POINTER (patch_info->data.table->table [i]->native_offset);
2388                                 } else {
2389                                         table [i] = NULL;
2390                                 }
2391                         }
2392                         patch_info->data.table->table = (MonoBasicBlock**)table;
2393                         break;
2394                 }
2395                 case MONO_PATCH_INFO_METHOD_JUMP: {
2396                         MonoJumpList *jlist;
2397                         MonoDomain *domain = cfg->domain;
2398                         unsigned char *ip = cfg->native_code + patch_info->ip.i;
2399 #if defined(__native_client__) && defined(__native_client_codegen__)
2400                         /* When this jump target gets evaluated, the method */
2401                         /* will be installed in the dynamic code section,   */
2402                         /* not at the location of cfg->native_code.         */
2403                         ip = nacl_inverse_modify_patch_target (cfg->native_code) + patch_info->ip.i;
2404 #endif
2405
2406                         mono_domain_lock (domain);
2407                         jlist = (MonoJumpList *)g_hash_table_lookup (domain_jit_info (domain)->jump_target_hash, patch_info->data.method);
2408                         if (!jlist) {
2409                                 jlist = (MonoJumpList *)mono_domain_alloc0 (domain, sizeof (MonoJumpList));
2410                                 g_hash_table_insert (domain_jit_info (domain)->jump_target_hash, patch_info->data.method, jlist);
2411                         }
2412                         jlist->list = g_slist_prepend (jlist->list, ip);
2413                         mono_domain_unlock (domain);
2414                         break;
2415                 }
2416                 default:
2417                         /* do nothing */
2418                         break;
2419                 }
2420         }
2421 }
2422
2423 void
2424 mono_codegen (MonoCompile *cfg)
2425 {
2426         MonoBasicBlock *bb;
2427         int max_epilog_size;
2428         guint8 *code;
2429         MonoDomain *code_domain;
2430         guint unwindlen = 0;
2431
2432         if (mono_using_xdebug)
2433                 /*
2434                  * Recent gdb versions have trouble processing symbol files containing
2435                  * overlapping address ranges, so allocate all code from the code manager
2436                  * of the root domain. (#666152).
2437                  */
2438                 code_domain = mono_get_root_domain ();
2439         else
2440                 code_domain = cfg->domain;
2441
2442 #if defined(__native_client_codegen__) && defined(__native_client__)
2443         void *code_dest;
2444
2445         /* This keeps patch targets from being transformed during
2446          * ordinary method compilation, for local branches and jumps.
2447          */
2448         nacl_allow_target_modification (FALSE);
2449 #endif
2450
2451         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
2452                 cfg->spill_count = 0;
2453                 /* we reuse dfn here */
2454                 /* bb->dfn = bb_count++; */
2455
2456                 mono_arch_lowering_pass (cfg, bb);
2457
2458                 if (cfg->opt & MONO_OPT_PEEPHOLE)
2459                         mono_arch_peephole_pass_1 (cfg, bb);
2460
2461                 mono_local_regalloc (cfg, bb);
2462
2463                 if (cfg->opt & MONO_OPT_PEEPHOLE)
2464                         mono_arch_peephole_pass_2 (cfg, bb);
2465
2466                 if (cfg->gen_seq_points && !cfg->gen_sdb_seq_points)
2467                         mono_bb_deduplicate_op_il_seq_points (cfg, bb);
2468         }
2469
2470         if (cfg->prof_options & MONO_PROFILE_COVERAGE)
2471                 cfg->coverage_info = mono_profiler_coverage_alloc (cfg->method, cfg->num_bblocks);
2472
2473         code = mono_arch_emit_prolog (cfg);
2474
2475         cfg->code_len = code - cfg->native_code;
2476         cfg->prolog_end = cfg->code_len;
2477         cfg->cfa_reg = cfg->cur_cfa_reg;
2478         cfg->cfa_offset = cfg->cur_cfa_offset;
2479
2480         mono_debug_open_method (cfg);
2481
2482         /* emit code all basic blocks */
2483         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
2484                 bb->native_offset = cfg->code_len;
2485                 bb->real_native_offset = cfg->code_len;
2486                 //if ((bb == cfg->bb_entry) || !(bb->region == -1 && !bb->dfn))
2487                         mono_arch_output_basic_block (cfg, bb);
2488                 bb->native_length = cfg->code_len - bb->native_offset;
2489
2490                 if (bb == cfg->bb_exit) {
2491                         cfg->epilog_begin = cfg->code_len;
2492                         mono_arch_emit_epilog (cfg);
2493                         cfg->epilog_end = cfg->code_len;
2494                 }
2495         }
2496
2497 #ifdef __native_client_codegen__
2498         mono_nacl_fix_patches (cfg->native_code, cfg->patch_info);
2499 #endif
2500         mono_arch_emit_exceptions (cfg);
2501
2502         max_epilog_size = 0;
2503
2504         /* we always allocate code in cfg->domain->code_mp to increase locality */
2505         cfg->code_size = cfg->code_len + max_epilog_size;
2506 #ifdef __native_client_codegen__
2507         cfg->code_size = NACL_BUNDLE_ALIGN_UP (cfg->code_size);
2508 #endif
2509         /* fixme: align to MONO_ARCH_CODE_ALIGNMENT */
2510
2511 #ifdef MONO_ARCH_HAVE_UNWIND_TABLE
2512         unwindlen = mono_arch_unwindinfo_get_size (cfg->arch.unwindinfo);
2513 #endif
2514
2515         if (cfg->method->dynamic) {
2516                 /* Allocate the code into a separate memory pool so it can be freed */
2517                 cfg->dynamic_info = g_new0 (MonoJitDynamicMethodInfo, 1);
2518                 cfg->dynamic_info->code_mp = mono_code_manager_new_dynamic ();
2519                 mono_domain_lock (cfg->domain);
2520                 mono_dynamic_code_hash_insert (cfg->domain, cfg->method, cfg->dynamic_info);
2521                 mono_domain_unlock (cfg->domain);
2522
2523                 if (mono_using_xdebug)
2524                         /* See the comment for cfg->code_domain */
2525                         code = (guint8 *)mono_domain_code_reserve (code_domain, cfg->code_size + cfg->thunk_area + unwindlen);
2526                 else
2527                         code = (guint8 *)mono_code_manager_reserve (cfg->dynamic_info->code_mp, cfg->code_size + cfg->thunk_area + unwindlen);
2528         } else {
2529                 code = (guint8 *)mono_domain_code_reserve (code_domain, cfg->code_size + cfg->thunk_area + unwindlen);
2530         }
2531 #if defined(__native_client_codegen__) && defined(__native_client__)
2532         nacl_allow_target_modification (TRUE);
2533 #endif
2534         if (cfg->thunk_area) {
2535                 cfg->thunks_offset = cfg->code_size + unwindlen;
2536                 cfg->thunks = code + cfg->thunks_offset;
2537                 memset (cfg->thunks, 0, cfg->thunk_area);
2538         }
2539
2540         g_assert (code);
2541         memcpy (code, cfg->native_code, cfg->code_len);
2542 #if defined(__default_codegen__)
2543         g_free (cfg->native_code);
2544 #elif defined(__native_client_codegen__)
2545         if (cfg->native_code_alloc) {
2546                 g_free (cfg->native_code_alloc);
2547                 cfg->native_code_alloc = 0;
2548         }
2549         else if (cfg->native_code) {
2550                 g_free (cfg->native_code);
2551         }
2552 #endif /* __native_client_codegen__ */
2553         cfg->native_code = code;
2554         code = cfg->native_code + cfg->code_len;
2555
2556         /* g_assert (((int)cfg->native_code & (MONO_ARCH_CODE_ALIGNMENT - 1)) == 0); */
2557         mono_postprocess_patches (cfg);
2558
2559 #ifdef VALGRIND_JIT_REGISTER_MAP
2560         if (valgrind_register){
2561                 char* nm = mono_method_full_name (cfg->method, TRUE);
2562                 VALGRIND_JIT_REGISTER_MAP (nm, cfg->native_code, cfg->native_code + cfg->code_len);
2563                 g_free (nm);
2564         }
2565 #endif
2566
2567         if (cfg->verbose_level > 0) {
2568                 char* nm = mono_method_full_name (cfg->method, TRUE);
2569                 char *opt_descr = mono_opt_descr (cfg->opt);
2570                 g_print ("Method %s emitted at %p to %p (code length %d) [%s] with opts %s\n",
2571                                  nm,
2572                                  cfg->native_code, cfg->native_code + cfg->code_len, cfg->code_len, cfg->domain->friendly_name,
2573                                  opt_descr);
2574                 g_free (nm);
2575                 g_free (opt_descr);
2576         }
2577
2578         {
2579                 gboolean is_generic = FALSE;
2580
2581                 if (cfg->method->is_inflated || mono_method_get_generic_container (cfg->method) ||
2582                                 cfg->method->klass->generic_container || cfg->method->klass->generic_class) {
2583                         is_generic = TRUE;
2584                 }
2585
2586                 if (cfg->gshared)
2587                         g_assert (is_generic);
2588         }
2589
2590 #ifdef MONO_ARCH_HAVE_SAVE_UNWIND_INFO
2591         mono_arch_save_unwind_info (cfg);
2592 #endif
2593
2594 #if defined(__native_client_codegen__) && defined(__native_client__)
2595         if (!cfg->compile_aot) {
2596                 if (cfg->method->dynamic) {
2597                         code_dest = nacl_code_manager_get_code_dest(cfg->dynamic_info->code_mp, cfg->native_code);
2598                 } else {
2599                         code_dest = nacl_domain_get_code_dest(cfg->domain, cfg->native_code);
2600                 }
2601         }
2602 #endif
2603
2604 #if defined(__native_client_codegen__)
2605         mono_nacl_fix_patches (cfg->native_code, cfg->patch_info);
2606 #endif
2607
2608 #ifdef MONO_ARCH_HAVE_PATCH_CODE_NEW
2609         {
2610                 MonoJumpInfo *ji;
2611                 gpointer target;
2612
2613                 for (ji = cfg->patch_info; ji; ji = ji->next) {
2614                         if (cfg->compile_aot) {
2615                                 switch (ji->type) {
2616                                 case MONO_PATCH_INFO_BB:
2617                                 case MONO_PATCH_INFO_LABEL:
2618                                         break;
2619                                 default:
2620                                         /* No need to patch these */
2621                                         continue;
2622                                 }
2623                         }
2624
2625                         if (ji->type == MONO_PATCH_INFO_NONE)
2626                                 continue;
2627
2628                         target = mono_resolve_patch_target (cfg->method, cfg->domain, cfg->native_code, ji, cfg->run_cctors);
2629                         mono_arch_patch_code_new (cfg, cfg->domain, cfg->native_code, ji, target);
2630                 }
2631         }
2632 #else
2633         mono_arch_patch_code (cfg, cfg->method, cfg->domain, cfg->native_code, cfg->patch_info, cfg->run_cctors);
2634 #endif
2635
2636         if (cfg->method->dynamic) {
2637                 if (mono_using_xdebug)
2638                         mono_domain_code_commit (code_domain, cfg->native_code, cfg->code_size, cfg->code_len);
2639                 else
2640                         mono_code_manager_commit (cfg->dynamic_info->code_mp, cfg->native_code, cfg->code_size, cfg->code_len);
2641         } else {
2642                 mono_domain_code_commit (code_domain, cfg->native_code, cfg->code_size, cfg->code_len);
2643         }
2644 #if defined(__native_client_codegen__) && defined(__native_client__)
2645         cfg->native_code = code_dest;
2646 #endif
2647         mono_profiler_code_buffer_new (cfg->native_code, cfg->code_len, MONO_PROFILER_CODE_BUFFER_METHOD, cfg->method);
2648
2649         mono_arch_flush_icache (cfg->native_code, cfg->code_len);
2650
2651         mono_debug_close_method (cfg);
2652
2653 #ifdef MONO_ARCH_HAVE_UNWIND_TABLE
2654         mono_arch_unwindinfo_install_unwind_info (&cfg->arch.unwindinfo, cfg->native_code, cfg->code_len);
2655 #endif
2656 }
2657
2658 static void
2659 compute_reachable (MonoBasicBlock *bb)
2660 {
2661         int i;
2662
2663         if (!(bb->flags & BB_VISITED)) {
2664                 bb->flags |= BB_VISITED;
2665                 for (i = 0; i < bb->out_count; ++i)
2666                         compute_reachable (bb->out_bb [i]);
2667         }
2668 }
2669
2670 static void
2671 mono_handle_out_of_line_bblock (MonoCompile *cfg)
2672 {
2673         MonoBasicBlock *bb;
2674         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
2675                 if (bb->next_bb && bb->next_bb->out_of_line && bb->last_ins && !MONO_IS_BRANCH_OP (bb->last_ins)) {
2676                         MonoInst *ins;
2677                         MONO_INST_NEW (cfg, ins, OP_BR);
2678                         MONO_ADD_INS (bb, ins);
2679                         ins->inst_target_bb = bb->next_bb;
2680                 }
2681         }
2682 }
2683
2684 static MonoJitInfo*
2685 create_jit_info (MonoCompile *cfg, MonoMethod *method_to_compile)
2686 {
2687         GSList *tmp;
2688         MonoMethodHeader *header;
2689         MonoJitInfo *jinfo;
2690         MonoJitInfoFlags flags = JIT_INFO_NONE;
2691         int num_clauses, num_holes = 0;
2692         guint32 stack_size = 0;
2693
2694         g_assert (method_to_compile == cfg->method);
2695         header = cfg->header;
2696
2697         if (cfg->gshared)
2698                 flags = (MonoJitInfoFlags)(flags | JIT_INFO_HAS_GENERIC_JIT_INFO);
2699
2700         if (cfg->arch_eh_jit_info) {
2701                 MonoJitArgumentInfo *arg_info;
2702                 MonoMethodSignature *sig = mono_method_signature (cfg->method_to_register);
2703
2704                 /*
2705                  * This cannot be computed during stack walking, as
2706                  * mono_arch_get_argument_info () is not signal safe.
2707                  */
2708                 arg_info = g_newa (MonoJitArgumentInfo, sig->param_count + 1);
2709                 stack_size = mono_arch_get_argument_info (sig, sig->param_count, arg_info);
2710
2711                 if (stack_size)
2712                         flags = (MonoJitInfoFlags)(flags | JIT_INFO_HAS_ARCH_EH_INFO);
2713         }
2714
2715         if (cfg->has_unwind_info_for_epilog && !(flags & JIT_INFO_HAS_ARCH_EH_INFO))
2716                 flags = (MonoJitInfoFlags)(flags | JIT_INFO_HAS_ARCH_EH_INFO);
2717
2718         if (cfg->thunk_area)
2719                 flags = (MonoJitInfoFlags)(flags | JIT_INFO_HAS_THUNK_INFO);
2720
2721         if (cfg->try_block_holes) {
2722                 for (tmp = cfg->try_block_holes; tmp; tmp = tmp->next) {
2723                         TryBlockHole *hole = (TryBlockHole *)tmp->data;
2724                         MonoExceptionClause *ec = hole->clause;
2725                         int hole_end = hole->basic_block->native_offset + hole->basic_block->native_length;
2726                         MonoBasicBlock *clause_last_bb = cfg->cil_offset_to_bb [ec->try_offset + ec->try_len];
2727                         g_assert (clause_last_bb);
2728
2729                         /* Holes at the end of a try region can be represented by simply reducing the size of the block itself.*/
2730                         if (clause_last_bb->native_offset != hole_end)
2731                                 ++num_holes;
2732                 }
2733                 if (num_holes)
2734                         flags = (MonoJitInfoFlags)(flags | JIT_INFO_HAS_TRY_BLOCK_HOLES);
2735                 if (G_UNLIKELY (cfg->verbose_level >= 4))
2736                         printf ("Number of try block holes %d\n", num_holes);
2737         }
2738
2739         if (COMPILE_LLVM (cfg))
2740                 num_clauses = cfg->llvm_ex_info_len;
2741         else
2742                 num_clauses = header->num_clauses;
2743
2744         if (cfg->method->dynamic)
2745                 jinfo = (MonoJitInfo *)g_malloc0 (mono_jit_info_size (flags, num_clauses, num_holes));
2746         else
2747                 jinfo = (MonoJitInfo *)mono_domain_alloc0 (cfg->domain, mono_jit_info_size (flags, num_clauses, num_holes));
2748         mono_jit_info_init (jinfo, cfg->method_to_register, cfg->native_code, cfg->code_len, flags, num_clauses, num_holes);
2749         jinfo->domain_neutral = (cfg->opt & MONO_OPT_SHARED) != 0;
2750
2751         if (COMPILE_LLVM (cfg))
2752                 jinfo->from_llvm = TRUE;
2753
2754         if (cfg->gshared) {
2755                 MonoInst *inst;
2756                 MonoGenericJitInfo *gi;
2757                 GSList *loclist = NULL;
2758
2759                 gi = mono_jit_info_get_generic_jit_info (jinfo);
2760                 g_assert (gi);
2761
2762                 if (cfg->method->dynamic)
2763                         gi->generic_sharing_context = g_new0 (MonoGenericSharingContext, 1);
2764                 else
2765                         gi->generic_sharing_context = (MonoGenericSharingContext *)mono_domain_alloc0 (cfg->domain, sizeof (MonoGenericSharingContext));
2766                 mini_init_gsctx (cfg->method->dynamic ? NULL : cfg->domain, NULL, cfg->gsctx_context, gi->generic_sharing_context);
2767
2768                 if ((method_to_compile->flags & METHOD_ATTRIBUTE_STATIC) ||
2769                                 mini_method_get_context (method_to_compile)->method_inst ||
2770                                 method_to_compile->klass->valuetype) {
2771                         g_assert (cfg->rgctx_var);
2772                 }
2773
2774                 gi->has_this = 1;
2775
2776                 if ((method_to_compile->flags & METHOD_ATTRIBUTE_STATIC) ||
2777                                 mini_method_get_context (method_to_compile)->method_inst ||
2778                                 method_to_compile->klass->valuetype) {
2779                         inst = cfg->rgctx_var;
2780                         if (!COMPILE_LLVM (cfg))
2781                                 g_assert (inst->opcode == OP_REGOFFSET);
2782                         loclist = cfg->rgctx_loclist;
2783                 } else {
2784                         inst = cfg->args [0];
2785                         loclist = cfg->this_loclist;
2786                 }
2787
2788                 if (loclist) {
2789                         /* Needed to handle async exceptions */
2790                         GSList *l;
2791                         int i;
2792
2793                         gi->nlocs = g_slist_length (loclist);
2794                         if (cfg->method->dynamic)
2795                                 gi->locations = (MonoDwarfLocListEntry *)g_malloc0 (gi->nlocs * sizeof (MonoDwarfLocListEntry));
2796                         else
2797                                 gi->locations = (MonoDwarfLocListEntry *)mono_domain_alloc0 (cfg->domain, gi->nlocs * sizeof (MonoDwarfLocListEntry));
2798                         i = 0;
2799                         for (l = loclist; l; l = l->next) {
2800                                 memcpy (&(gi->locations [i]), l->data, sizeof (MonoDwarfLocListEntry));
2801                                 i ++;
2802                         }
2803                 }
2804
2805                 if (COMPILE_LLVM (cfg)) {
2806                         g_assert (cfg->llvm_this_reg != -1);
2807                         gi->this_in_reg = 0;
2808                         gi->this_reg = cfg->llvm_this_reg;
2809                         gi->this_offset = cfg->llvm_this_offset;
2810                 } else if (inst->opcode == OP_REGVAR) {
2811                         gi->this_in_reg = 1;
2812                         gi->this_reg = inst->dreg;
2813                 } else {
2814                         g_assert (inst->opcode == OP_REGOFFSET);
2815 #ifdef TARGET_X86
2816                         g_assert (inst->inst_basereg == X86_EBP);
2817 #elif defined(TARGET_AMD64)
2818                         g_assert (inst->inst_basereg == X86_EBP || inst->inst_basereg == X86_ESP);
2819 #endif
2820                         g_assert (inst->inst_offset >= G_MININT32 && inst->inst_offset <= G_MAXINT32);
2821
2822                         gi->this_in_reg = 0;
2823                         gi->this_reg = inst->inst_basereg;
2824                         gi->this_offset = inst->inst_offset;
2825                 }
2826         }
2827
2828         if (num_holes) {
2829                 MonoTryBlockHoleTableJitInfo *table;
2830                 int i;
2831
2832                 table = mono_jit_info_get_try_block_hole_table_info (jinfo);
2833                 table->num_holes = (guint16)num_holes;
2834                 i = 0;
2835                 for (tmp = cfg->try_block_holes; tmp; tmp = tmp->next) {
2836                         guint32 start_bb_offset;
2837                         MonoTryBlockHoleJitInfo *hole;
2838                         TryBlockHole *hole_data = (TryBlockHole *)tmp->data;
2839                         MonoExceptionClause *ec = hole_data->clause;
2840                         int hole_end = hole_data->basic_block->native_offset + hole_data->basic_block->native_length;
2841                         MonoBasicBlock *clause_last_bb = cfg->cil_offset_to_bb [ec->try_offset + ec->try_len];
2842                         g_assert (clause_last_bb);
2843
2844                         /* Holes at the end of a try region can be represented by simply reducing the size of the block itself.*/
2845                         if (clause_last_bb->native_offset == hole_end)
2846                                 continue;
2847
2848                         start_bb_offset = hole_data->start_offset - hole_data->basic_block->native_offset;
2849                         hole = &table->holes [i++];
2850                         hole->clause = hole_data->clause - &header->clauses [0];
2851                         hole->offset = (guint32)hole_data->start_offset;
2852                         hole->length = (guint16)(hole_data->basic_block->native_length - start_bb_offset);
2853
2854                         if (G_UNLIKELY (cfg->verbose_level >= 4))
2855                                 printf ("\tTry block hole at eh clause %d offset %x length %x\n", hole->clause, hole->offset, hole->length);
2856                 }
2857                 g_assert (i == num_holes);
2858         }
2859
2860         if (jinfo->has_arch_eh_info) {
2861                 MonoArchEHJitInfo *info;
2862
2863                 info = mono_jit_info_get_arch_eh_info (jinfo);
2864
2865                 info->stack_size = stack_size;
2866         }
2867
2868         if (cfg->thunk_area) {
2869                 MonoThunkJitInfo *info;
2870
2871                 info = mono_jit_info_get_thunk_info (jinfo);
2872                 info->thunks_offset = cfg->thunks_offset;
2873                 info->thunks_size = cfg->thunk_area;
2874         }
2875
2876         if (COMPILE_LLVM (cfg)) {
2877                 if (num_clauses)
2878                         memcpy (&jinfo->clauses [0], &cfg->llvm_ex_info [0], num_clauses * sizeof (MonoJitExceptionInfo));
2879         } else if (header->num_clauses) {
2880                 int i;
2881
2882                 for (i = 0; i < header->num_clauses; i++) {
2883                         MonoExceptionClause *ec = &header->clauses [i];
2884                         MonoJitExceptionInfo *ei = &jinfo->clauses [i];
2885                         MonoBasicBlock *tblock;
2886                         MonoInst *exvar, *spvar;
2887
2888                         ei->flags = ec->flags;
2889
2890                         if (G_UNLIKELY (cfg->verbose_level >= 4))
2891                                 printf ("IL clause: try 0x%x-0x%x handler 0x%x-0x%x filter 0x%x\n", ec->try_offset, ec->try_offset + ec->try_len, ec->handler_offset, ec->handler_offset + ec->handler_len, ec->flags == MONO_EXCEPTION_CLAUSE_FILTER ? ec->data.filter_offset : 0);
2892
2893                         /*
2894                          * The spvars are needed by mono_arch_install_handler_block_guard ().
2895                          */
2896                         if (ei->flags == MONO_EXCEPTION_CLAUSE_FINALLY) {
2897                                 int region;
2898
2899                                 region = ((i + 1) << 8) | MONO_REGION_FINALLY | ec->flags;
2900                                 spvar = mono_find_spvar_for_region (cfg, region);
2901                                 g_assert (spvar);
2902                                 ei->exvar_offset = spvar->inst_offset;
2903                         } else {
2904                                 exvar = mono_find_exvar_for_offset (cfg, ec->handler_offset);
2905                                 ei->exvar_offset = exvar ? exvar->inst_offset : 0;
2906                         }
2907
2908                         if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
2909                                 tblock = cfg->cil_offset_to_bb [ec->data.filter_offset];
2910                                 g_assert (tblock);
2911                                 ei->data.filter = cfg->native_code + tblock->native_offset;
2912                         } else {
2913                                 ei->data.catch_class = ec->data.catch_class;
2914                         }
2915
2916                         tblock = cfg->cil_offset_to_bb [ec->try_offset];
2917                         g_assert (tblock);
2918                         g_assert (tblock->native_offset);
2919                         ei->try_start = cfg->native_code + tblock->native_offset;
2920                         if (tblock->extend_try_block) {
2921                                 /*
2922                                  * Extend the try block backwards to include parts of the previous call
2923                                  * instruction.
2924                                  */
2925                                 ei->try_start = (guint8*)ei->try_start - cfg->backend->monitor_enter_adjustment;
2926                         }
2927                         tblock = cfg->cil_offset_to_bb [ec->try_offset + ec->try_len];
2928                         g_assert (tblock);
2929                         if (!tblock->native_offset) {
2930                                 int j, end;
2931                                 for (j = ec->try_offset + ec->try_len, end = ec->try_offset; j >= end; --j) {
2932                                         MonoBasicBlock *bb = cfg->cil_offset_to_bb [j];
2933                                         if (bb && bb->native_offset) {
2934                                                 tblock = bb;
2935                                                 break;
2936                                         }
2937                                 }
2938                         }
2939                         ei->try_end = cfg->native_code + tblock->native_offset;
2940                         g_assert (tblock->native_offset);
2941                         tblock = cfg->cil_offset_to_bb [ec->handler_offset];
2942                         g_assert (tblock);
2943                         ei->handler_start = cfg->native_code + tblock->native_offset;
2944
2945                         for (tmp = cfg->try_block_holes; tmp; tmp = tmp->next) {
2946                                 TryBlockHole *hole = (TryBlockHole *)tmp->data;
2947                                 gpointer hole_end = cfg->native_code + (hole->basic_block->native_offset + hole->basic_block->native_length);
2948                                 if (hole->clause == ec && hole_end == ei->try_end) {
2949                                         if (G_UNLIKELY (cfg->verbose_level >= 4))
2950                                                 printf ("\tShortening try block %d from %x to %x\n", i, (int)((guint8*)ei->try_end - cfg->native_code), hole->start_offset);
2951
2952                                         ei->try_end = cfg->native_code + hole->start_offset;
2953                                         break;
2954                                 }
2955                         }
2956
2957                         if (ec->flags == MONO_EXCEPTION_CLAUSE_FINALLY) {
2958                                 int end_offset;
2959                                 if (ec->handler_offset + ec->handler_len < header->code_size) {
2960                                         tblock = cfg->cil_offset_to_bb [ec->handler_offset + ec->handler_len];
2961                                         if (tblock->native_offset) {
2962                                                 end_offset = tblock->native_offset;
2963                                         } else {
2964                                                 int j, end;
2965
2966                                                 for (j = ec->handler_offset + ec->handler_len, end = ec->handler_offset; j >= end; --j) {
2967                                                         MonoBasicBlock *bb = cfg->cil_offset_to_bb [j];
2968                                                         if (bb && bb->native_offset) {
2969                                                                 tblock = bb;
2970                                                                 break;
2971                                                         }
2972                                                 }
2973                                                 end_offset = tblock->native_offset +  tblock->native_length;
2974                                         }
2975                                 } else {
2976                                         end_offset = cfg->epilog_begin;
2977                                 }
2978                                 ei->data.handler_end = cfg->native_code + end_offset;
2979                         }
2980                 }
2981         }
2982
2983         if (G_UNLIKELY (cfg->verbose_level >= 4)) {
2984                 int i;
2985                 for (i = 0; i < jinfo->num_clauses; i++) {
2986                         MonoJitExceptionInfo *ei = &jinfo->clauses [i];
2987                         int start = (guint8*)ei->try_start - cfg->native_code;
2988                         int end = (guint8*)ei->try_end - cfg->native_code;
2989                         int handler = (guint8*)ei->handler_start - cfg->native_code;
2990                         int handler_end = (guint8*)ei->data.handler_end - cfg->native_code;
2991
2992                         printf ("JitInfo EH clause %d flags %x try %x-%x handler %x-%x\n", i, ei->flags, start, end, handler, handler_end);
2993                 }
2994         }
2995
2996         if (cfg->encoded_unwind_ops) {
2997                 /* Generated by LLVM */
2998                 jinfo->unwind_info = mono_cache_unwind_info (cfg->encoded_unwind_ops, cfg->encoded_unwind_ops_len);
2999                 g_free (cfg->encoded_unwind_ops);
3000         } else if (cfg->unwind_ops) {
3001                 guint32 info_len;
3002                 guint8 *unwind_info = mono_unwind_ops_encode (cfg->unwind_ops, &info_len);
3003                 guint32 unwind_desc;
3004
3005                 unwind_desc = mono_cache_unwind_info (unwind_info, info_len);
3006
3007                 if (cfg->has_unwind_info_for_epilog) {
3008                         MonoArchEHJitInfo *info;
3009
3010                         info = mono_jit_info_get_arch_eh_info (jinfo);
3011                         g_assert (info);
3012                         info->epilog_size = cfg->code_len - cfg->epilog_begin;
3013                 }
3014                 jinfo->unwind_info = unwind_desc;
3015                 g_free (unwind_info);
3016         } else {
3017                 jinfo->unwind_info = cfg->used_int_regs;
3018         }
3019
3020         return jinfo;
3021 }
3022
3023 /* Return whenever METHOD is a gsharedvt method */
3024 static gboolean
3025 is_gsharedvt_method (MonoMethod *method)
3026 {
3027         MonoGenericContext *context;
3028         MonoGenericInst *inst;
3029         int i;
3030
3031         if (!method->is_inflated)
3032                 return FALSE;
3033         context = mono_method_get_context (method);
3034         inst = context->class_inst;
3035         if (inst) {
3036                 for (i = 0; i < inst->type_argc; ++i)
3037                         if (mini_is_gsharedvt_gparam (inst->type_argv [i]))
3038                                 return TRUE;
3039         }
3040         inst = context->method_inst;
3041         if (inst) {
3042                 for (i = 0; i < inst->type_argc; ++i)
3043                         if (mini_is_gsharedvt_gparam (inst->type_argv [i]))
3044                                 return TRUE;
3045         }
3046         return FALSE;
3047 }
3048
3049 static gboolean
3050 is_open_method (MonoMethod *method)
3051 {
3052         MonoGenericContext *context;
3053
3054         if (!method->is_inflated)
3055                 return FALSE;
3056         context = mono_method_get_context (method);
3057         if (context->class_inst && context->class_inst->is_open)
3058                 return TRUE;
3059         if (context->method_inst && context->method_inst->is_open)
3060                 return TRUE;
3061         return FALSE;
3062 }
3063
3064 static void
3065 mono_create_gc_safepoint (MonoCompile *cfg, MonoBasicBlock *bblock)
3066 {
3067         MonoInst *poll_addr, *ins;
3068         if (cfg->verbose_level > 1)
3069                 printf ("ADDING SAFE POINT TO BB %d\n", bblock->block_num);
3070
3071 #if defined(__native_client_codegen__)
3072         NEW_AOTCONST (cfg, poll_addr, MONO_PATCH_INFO_GC_SAFE_POINT_FLAG, (gpointer)&__nacl_thread_suspension_needed);
3073 #else
3074         g_assert (mono_threads_is_coop_enabled ());
3075         NEW_AOTCONST (cfg, poll_addr, MONO_PATCH_INFO_GC_SAFE_POINT_FLAG, (gpointer)&mono_polling_required);
3076 #endif
3077
3078         MONO_INST_NEW (cfg, ins, OP_GC_SAFE_POINT);
3079         ins->sreg1 = poll_addr->dreg;
3080
3081          if (bblock->flags & BB_EXCEPTION_HANDLER) {
3082                 MonoInst *eh_op = bblock->code;
3083
3084                 if (eh_op && eh_op->opcode != OP_START_HANDLER && eh_op->opcode != OP_GET_EX_OBJ) {
3085                         eh_op = NULL;
3086                 } else {
3087                         MonoInst *next_eh_op = eh_op ? eh_op->next : NULL;
3088                         // skip all EH relateds ops
3089                         while (next_eh_op && (next_eh_op->opcode == OP_START_HANDLER || next_eh_op->opcode == OP_GET_EX_OBJ)) {
3090                                 eh_op = next_eh_op;
3091                                 next_eh_op = eh_op->next;
3092                         }
3093                 }
3094
3095                 mono_bblock_insert_after_ins (bblock, eh_op, poll_addr);
3096                 mono_bblock_insert_after_ins (bblock, poll_addr, ins);
3097         } else if (bblock == cfg->bb_entry) {
3098                 mono_bblock_insert_after_ins (bblock, bblock->last_ins, poll_addr);
3099                 mono_bblock_insert_after_ins (bblock, poll_addr, ins);
3100
3101         } else {
3102                 mono_bblock_insert_before_ins (bblock, NULL, poll_addr);
3103                 mono_bblock_insert_after_ins (bblock, poll_addr, ins);
3104         }
3105 }
3106
3107 /*
3108 This code inserts safepoints into managed code at important code paths.
3109 Those are:
3110
3111 -the first basic block
3112 -landing BB for exception handlers
3113 -loop body starts.
3114
3115 */
3116 static void
3117 mono_insert_safepoints (MonoCompile *cfg)
3118 {
3119         MonoBasicBlock *bb;
3120
3121 #if !defined(__native_client_codegen__)
3122         if (!mono_threads_is_coop_enabled ())
3123                 return;
3124 #endif
3125
3126         if (cfg->method->wrapper_type == MONO_WRAPPER_MANAGED_TO_NATIVE) {
3127                 WrapperInfo *info = mono_marshal_get_wrapper_info (cfg->method);
3128 #if defined(__native_client__) || defined(__native_client_codegen__)
3129                 gpointer poll_func = &mono_nacl_gc;
3130 #else
3131                 g_assert (mono_threads_is_coop_enabled ());
3132                 gpointer poll_func = &mono_threads_state_poll;
3133 #endif
3134
3135                 if (info && info->subtype == WRAPPER_SUBTYPE_ICALL_WRAPPER && info->d.icall.func == poll_func) {
3136                         if (cfg->verbose_level > 1)
3137                                 printf ("SKIPPING SAFEPOINTS for the polling function icall\n");
3138                         return;
3139                 }
3140         }
3141
3142         if (cfg->method->wrapper_type == MONO_WRAPPER_NATIVE_TO_MANAGED) {
3143                 if (cfg->verbose_level > 1)
3144                         printf ("SKIPPING SAFEPOINTS for native-to-managed wrappers.\n");
3145                 return;
3146         }
3147
3148         if (cfg->method->wrapper_type == MONO_WRAPPER_MANAGED_TO_NATIVE) {
3149                 WrapperInfo *info = mono_marshal_get_wrapper_info (cfg->method);
3150
3151                 if (info && info->subtype == WRAPPER_SUBTYPE_ICALL_WRAPPER &&
3152                         (info->d.icall.func == mono_thread_interruption_checkpoint ||
3153                         info->d.icall.func == mono_threads_finish_blocking ||
3154                         info->d.icall.func == mono_threads_reset_blocking_start)) {
3155                         /* These wrappers are called from the wrapper for the polling function, leading to potential stack overflow */
3156                         if (cfg->verbose_level > 1)
3157                                 printf ("SKIPPING SAFEPOINTS for wrapper %s\n", cfg->method->name);
3158                         return;
3159                 }
3160         }
3161
3162         if (cfg->verbose_level > 1)
3163                 printf ("INSERTING SAFEPOINTS\n");
3164         if (cfg->verbose_level > 2)
3165                 mono_print_code (cfg, "BEFORE SAFEPOINTS");
3166
3167         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
3168                 if (bb->loop_body_start || bb == cfg->bb_entry || bb->flags & BB_EXCEPTION_HANDLER)
3169                         mono_create_gc_safepoint (cfg, bb);
3170         }
3171
3172         if (cfg->verbose_level > 2)
3173                 mono_print_code (cfg, "AFTER SAFEPOINTS");
3174
3175 }
3176
3177 static void
3178 init_backend (MonoBackend *backend)
3179 {
3180 #ifdef MONO_ARCH_NEED_GOT_VAR
3181         backend->need_got_var = 1;
3182 #endif
3183 #ifdef MONO_ARCH_HAVE_CARD_TABLE_WBARRIER
3184         backend->have_card_table_wb = 1;
3185 #endif
3186 #ifdef MONO_ARCH_HAVE_OP_GENERIC_CLASS_INIT
3187         backend->have_op_generic_class_init = 1;
3188 #endif
3189 #ifdef MONO_ARCH_EMULATE_MUL_DIV
3190         backend->emulate_mul_div = 1;
3191 #endif
3192 #ifdef MONO_ARCH_EMULATE_DIV
3193         backend->emulate_div = 1;
3194 #endif
3195 #if !defined(MONO_ARCH_NO_EMULATE_LONG_SHIFT_OPS)
3196         backend->emulate_long_shift_opts = 1;
3197 #endif
3198 #ifdef MONO_ARCH_HAVE_OBJC_GET_SELECTOR
3199         backend->have_objc_get_selector = 1;
3200 #endif
3201 #ifdef MONO_ARCH_HAVE_GENERALIZED_IMT_THUNK
3202         backend->have_generalized_imt_thunk = 1;
3203 #endif
3204 #ifdef MONO_ARCH_GSHARED_SUPPORTED
3205         backend->gshared_supported = 1;
3206 #endif
3207         if (MONO_ARCH_HAVE_TLS_GET)
3208                 backend->have_tls_get = 1;
3209 #ifdef MONO_ARCH_HAVE_TLS_GET_REG
3210                 backend->have_tls_get_reg = 1;
3211 #endif
3212         if (MONO_ARCH_USE_FPSTACK)
3213                 backend->use_fpstack = 1;
3214 #ifdef MONO_ARCH_HAVE_LIVERANGE_OPS
3215         backend->have_liverange_ops = 1;
3216 #endif
3217 #ifdef MONO_ARCH_HAVE_OP_TAIL_CALL
3218         backend->have_op_tail_call = 1;
3219 #endif
3220 #ifndef MONO_ARCH_MONITOR_ENTER_ADJUSTMENT
3221         backend->monitor_enter_adjustment = 1;
3222 #else
3223         backend->monitor_enter_adjustment = MONO_ARCH_MONITOR_ENTER_ADJUSTMENT;
3224 #endif
3225 #if defined(__mono_ilp32__)
3226         backend->ilp32 = 1;
3227 #endif
3228 #ifdef MONO_ARCH_HAVE_DUMMY_INIT
3229         backend->have_dummy_init = 1;
3230 #endif
3231 #ifdef MONO_ARCH_NEED_DIV_CHECK
3232         backend->need_div_check = 1;
3233 #endif
3234 #ifdef NO_UNALIGNED_ACCESS
3235         backend->no_unaligned_access = 1;
3236 #endif
3237 #ifdef MONO_ARCH_DYN_CALL_PARAM_AREA
3238         backend->dyn_call_param_area = MONO_ARCH_DYN_CALL_PARAM_AREA;
3239 #endif
3240 }
3241
3242 /*
3243  * mini_method_compile:
3244  * @method: the method to compile
3245  * @opts: the optimization flags to use
3246  * @domain: the domain where the method will be compiled in
3247  * @flags: compilation flags
3248  * @parts: debug flag
3249  *
3250  * Returns: a MonoCompile* pointer. Caller must check the exception_type
3251  * field in the returned struct to see if compilation succeded.
3252  */
3253 MonoCompile*
3254 mini_method_compile (MonoMethod *method, guint32 opts, MonoDomain *domain, JitFlags flags, int parts, int aot_method_index)
3255 {
3256         MonoMethodHeader *header;
3257         MonoMethodSignature *sig;
3258         MonoError err;
3259         MonoCompile *cfg;
3260         int dfn, i, code_size_ratio;
3261         gboolean try_generic_shared, try_llvm = FALSE;
3262         MonoMethod *method_to_compile, *method_to_register;
3263         gboolean method_is_gshared = FALSE;
3264         gboolean run_cctors = (flags & JIT_FLAG_RUN_CCTORS) ? 1 : 0;
3265         gboolean compile_aot = (flags & JIT_FLAG_AOT) ? 1 : 0;
3266         gboolean full_aot = (flags & JIT_FLAG_FULL_AOT) ? 1 : 0;
3267         gboolean disable_direct_icalls = (flags & JIT_FLAG_NO_DIRECT_ICALLS) ? 1 : 0;
3268         gboolean gsharedvt_method = FALSE;
3269 #ifdef ENABLE_LLVM
3270         gboolean llvm = (flags & JIT_FLAG_LLVM) ? 1 : 0;
3271 #endif
3272         static gboolean verbose_method_inited;
3273         static const char *verbose_method_name;
3274
3275         InterlockedIncrement (&mono_jit_stats.methods_compiled);
3276         if (mono_profiler_get_events () & MONO_PROFILE_JIT_COMPILATION)
3277                 mono_profiler_method_jit (method);
3278         if (MONO_METHOD_COMPILE_BEGIN_ENABLED ())
3279                 MONO_PROBE_METHOD_COMPILE_BEGIN (method);
3280
3281         gsharedvt_method = is_gsharedvt_method (method);
3282
3283         /*
3284          * In AOT mode, method can be the following:
3285          * - a gsharedvt method.
3286          * - a method inflated with type parameters. This is for ref/partial sharing.
3287          * - a method inflated with concrete types.
3288          */
3289         if (compile_aot) {
3290                 if (is_open_method (method)) {
3291                         try_generic_shared = TRUE;
3292                         method_is_gshared = TRUE;
3293                 } else {
3294                         try_generic_shared = FALSE;
3295                 }
3296                 g_assert (opts & MONO_OPT_GSHARED);
3297         } else {
3298                 try_generic_shared = mono_class_generic_sharing_enabled (method->klass) &&
3299                         (opts & MONO_OPT_GSHARED) && mono_method_is_generic_sharable (method, FALSE);
3300                 if (mini_is_gsharedvt_sharable_method (method)) {
3301                         /*
3302                         if (!mono_debug_count ())
3303                                 try_generic_shared = FALSE;
3304                         */
3305                 }
3306         }
3307
3308         /*
3309         if (try_generic_shared && !mono_debug_count ())
3310                 try_generic_shared = FALSE;
3311         */
3312
3313         if (opts & MONO_OPT_GSHARED) {
3314                 if (try_generic_shared)
3315                         mono_stats.generics_sharable_methods++;
3316                 else if (mono_method_is_generic_impl (method))
3317                         mono_stats.generics_unsharable_methods++;
3318         }
3319
3320 #ifdef ENABLE_LLVM
3321         try_llvm = mono_use_llvm || llvm;
3322 #endif
3323
3324  restart_compile:
3325         if (method_is_gshared) {
3326                 method_to_compile = method;
3327         } else {
3328                 if (try_generic_shared) {
3329                         method_to_compile = mini_get_shared_method (method);
3330                         g_assert (method_to_compile);
3331                 } else {
3332                         method_to_compile = method;
3333                 }
3334         }
3335
3336         cfg = g_new0 (MonoCompile, 1);
3337         cfg->method = method_to_compile;
3338         cfg->header = mono_method_get_header (cfg->method);
3339         cfg->mempool = mono_mempool_new ();
3340         cfg->opt = opts;
3341         cfg->prof_options = mono_profiler_get_events ();
3342         cfg->run_cctors = run_cctors;
3343         cfg->domain = domain;
3344         cfg->verbose_level = mini_verbose;
3345         cfg->compile_aot = compile_aot;
3346         cfg->full_aot = full_aot;
3347         cfg->skip_visibility = method->skip_visibility;
3348         cfg->orig_method = method;
3349         cfg->gen_seq_points = debug_options.gen_seq_points_compact_data || debug_options.gen_sdb_seq_points;
3350         cfg->gen_sdb_seq_points = debug_options.gen_sdb_seq_points;
3351         cfg->llvm_only = (flags & JIT_FLAG_LLVM_ONLY) != 0;
3352         cfg->backend = current_backend;
3353
3354 #ifdef PLATFORM_ANDROID
3355         if (cfg->method->wrapper_type != MONO_WRAPPER_NONE) {
3356                 /* FIXME: Why is this needed */
3357                 cfg->gen_seq_points = FALSE;
3358                 cfg->gen_sdb_seq_points = FALSE;
3359         }
3360 #endif
3361         /* coop / nacl requires loop detection to happen */
3362 #if defined(__native_client_codegen__)
3363         cfg->opt |= MONO_OPT_LOOP;
3364 #else
3365         if (mono_threads_is_coop_enabled ())
3366                 cfg->opt |= MONO_OPT_LOOP;
3367 #endif
3368         cfg->explicit_null_checks = debug_options.explicit_null_checks || (flags & JIT_FLAG_EXPLICIT_NULL_CHECKS);
3369         cfg->soft_breakpoints = debug_options.soft_breakpoints;
3370         cfg->check_pinvoke_callconv = debug_options.check_pinvoke_callconv;
3371         cfg->disable_direct_icalls = disable_direct_icalls;
3372         if (try_generic_shared)
3373                 cfg->gshared = TRUE;
3374         cfg->compile_llvm = try_llvm;
3375         cfg->token_info_hash = g_hash_table_new (NULL, NULL);
3376         if (cfg->compile_aot)
3377                 cfg->method_index = aot_method_index;
3378
3379         /*
3380         if (!mono_debug_count ())
3381                 cfg->opt &= ~MONO_OPT_FLOAT32;
3382         */
3383         if (cfg->llvm_only)
3384                 cfg->opt &= ~MONO_OPT_SIMD;
3385         cfg->r4fp = (cfg->opt & MONO_OPT_FLOAT32) ? 1 : 0;
3386         cfg->r4_stack_type = cfg->r4fp ? STACK_R4 : STACK_R8;
3387
3388         if (cfg->gen_seq_points)
3389                 cfg->seq_points = g_ptr_array_new ();
3390         mono_error_init (&cfg->error);
3391
3392         if (cfg->compile_aot && !try_generic_shared && (method->is_generic || method->klass->generic_container || method_is_gshared)) {
3393                 cfg->exception_type = MONO_EXCEPTION_GENERIC_SHARING_FAILED;
3394                 return cfg;
3395         }
3396
3397         if (cfg->gshared && (gsharedvt_method || mini_is_gsharedvt_sharable_method (method))) {
3398                 MonoMethodInflated *inflated;
3399                 MonoGenericContext *context;
3400
3401                 if (gsharedvt_method) {
3402                         g_assert (method->is_inflated);
3403                         inflated = (MonoMethodInflated*)method;
3404                         context = &inflated->context;
3405
3406                         /* We are compiling a gsharedvt method directly */
3407                         g_assert (compile_aot);
3408                 } else {
3409                         g_assert (method_to_compile->is_inflated);
3410                         inflated = (MonoMethodInflated*)method_to_compile;
3411                         context = &inflated->context;
3412                 }
3413
3414                 mini_init_gsctx (NULL, cfg->mempool, context, &cfg->gsctx);
3415                 cfg->gsctx_context = context;
3416
3417                 cfg->gsharedvt = TRUE;
3418                 if (!cfg->llvm_only) {
3419                         cfg->disable_llvm = TRUE;
3420                         cfg->exception_message = g_strdup ("gsharedvt");
3421                 }
3422         }
3423
3424         if (cfg->gshared) {
3425                 method_to_register = method_to_compile;
3426         } else {
3427                 g_assert (method == method_to_compile);
3428                 method_to_register = method;
3429         }
3430         cfg->method_to_register = method_to_register;
3431
3432         mono_error_init (&err);
3433         sig = mono_method_signature_checked (cfg->method, &err);
3434         if (!sig) {
3435                 cfg->exception_type = MONO_EXCEPTION_TYPE_LOAD;
3436                 cfg->exception_message = g_strdup (mono_error_get_message (&err));
3437                 mono_error_cleanup (&err);
3438                 if (MONO_METHOD_COMPILE_END_ENABLED ())
3439                         MONO_PROBE_METHOD_COMPILE_END (method, FALSE);
3440                 return cfg;
3441         }
3442
3443         header = cfg->header;
3444         if (!header) {
3445                 MonoLoaderError *error;
3446
3447                 if ((error = mono_loader_get_last_error ())) {
3448                         cfg->exception_type = error->exception_type;
3449                 } else {
3450                         cfg->exception_type = MONO_EXCEPTION_INVALID_PROGRAM;
3451                         cfg->exception_message = g_strdup_printf ("Missing or incorrect header for method %s", cfg->method->name);
3452                 }
3453                 if (MONO_METHOD_COMPILE_END_ENABLED ())
3454                         MONO_PROBE_METHOD_COMPILE_END (method, FALSE);
3455                 return cfg;
3456         }
3457
3458 #ifdef ENABLE_LLVM
3459         {
3460                 static gboolean inited;
3461
3462                 if (!inited)
3463                         inited = TRUE;
3464
3465                 /*
3466                  * Check for methods which cannot be compiled by LLVM early, to avoid
3467                  * the extra compilation pass.
3468                  */
3469                 if (COMPILE_LLVM (cfg)) {
3470                         mono_llvm_check_method_supported (cfg);
3471                         if (cfg->disable_llvm) {
3472                                 if (cfg->verbose_level >= (cfg->llvm_only ? 0 : 1)) {
3473                                         //nm = mono_method_full_name (cfg->method, TRUE);
3474                                         printf ("LLVM failed for '%s': %s\n", method->name, cfg->exception_message);
3475                                         //g_free (nm);
3476                                 }
3477                                 if (cfg->llvm_only) {
3478                                         cfg->disable_aot = TRUE;
3479                                         return cfg;
3480                                 }
3481                                 mono_destroy_compile (cfg);
3482                                 try_llvm = FALSE;
3483                                 goto restart_compile;
3484                         }
3485                 }
3486         }
3487 #endif
3488
3489         /* The debugger has no liveness information, so avoid sharing registers/stack slots */
3490         if (debug_options.mdb_optimizations) {
3491                 cfg->disable_reuse_registers = TRUE;
3492                 cfg->disable_reuse_stack_slots = TRUE;
3493                 /*
3494                  * This decreases the change the debugger will read registers/stack slots which are
3495                  * not yet initialized.
3496                  */
3497                 cfg->disable_initlocals_opt = TRUE;
3498
3499                 cfg->extend_live_ranges = TRUE;
3500
3501                 /* The debugger needs all locals to be on the stack or in a global register */
3502                 cfg->disable_vreg_to_lvreg = TRUE;
3503
3504                 /* Don't remove unused variables when running inside the debugger since the user
3505                  * may still want to view them. */
3506                 cfg->disable_deadce_vars = TRUE;
3507
3508                 cfg->opt &= ~MONO_OPT_DEADCE;
3509                 cfg->opt &= ~MONO_OPT_INLINE;
3510                 cfg->opt &= ~MONO_OPT_COPYPROP;
3511                 cfg->opt &= ~MONO_OPT_CONSPROP;
3512
3513                 /* This is needed for the soft debugger, which doesn't like code after the epilog */
3514                 cfg->disable_out_of_line_bblocks = TRUE;
3515         }
3516
3517         if (mono_using_xdebug) {
3518                 /*
3519                  * Make each variable use its own register/stack slot and extend
3520                  * their liveness to cover the whole method, making them displayable
3521                  * in gdb even after they are dead.
3522                  */
3523                 cfg->disable_reuse_registers = TRUE;
3524                 cfg->disable_reuse_stack_slots = TRUE;
3525                 cfg->extend_live_ranges = TRUE;
3526                 cfg->compute_precise_live_ranges = TRUE;
3527         }
3528
3529         mini_gc_init_cfg (cfg);
3530
3531         if (COMPILE_LLVM (cfg)) {
3532                 cfg->opt |= MONO_OPT_ABCREM;
3533         }
3534
3535         if (!verbose_method_inited) {
3536                 verbose_method_name = g_getenv ("MONO_VERBOSE_METHOD");
3537                 verbose_method_inited = TRUE;
3538         }
3539         if (verbose_method_name) {
3540                 const char *name = verbose_method_name;
3541
3542                 if ((strchr (name, '.') > name) || strchr (name, ':')) {
3543                         MonoMethodDesc *desc;
3544
3545                         desc = mono_method_desc_new (name, TRUE);
3546                         if (mono_method_desc_full_match (desc, cfg->method)) {
3547                                 cfg->verbose_level = 4;
3548                         }
3549                         mono_method_desc_free (desc);
3550                 } else {
3551                         if (strcmp (cfg->method->name, name) == 0)
3552                                 cfg->verbose_level = 4;
3553                 }
3554         }
3555
3556         cfg->intvars = (guint16 *)mono_mempool_alloc0 (cfg->mempool, sizeof (guint16) * STACK_MAX * header->max_stack);
3557
3558         if (cfg->verbose_level > 0) {
3559                 char *method_name;
3560
3561                 method_name = mono_method_full_name (method, TRUE);
3562                 g_print ("converting %s%s%smethod %s\n", COMPILE_LLVM (cfg) ? "llvm " : "", cfg->gsharedvt ? "gsharedvt " : "", (cfg->gshared && !cfg->gsharedvt) ? "gshared " : "", method_name);
3563                 /*
3564                 if (COMPILE_LLVM (cfg))
3565                         g_print ("converting llvm method %s\n", method_name = mono_method_full_name (method, TRUE));
3566                 else if (cfg->gsharedvt)
3567                         g_print ("converting gsharedvt method %s\n", method_name = mono_method_full_name (method_to_compile, TRUE));
3568                 else if (cfg->gshared)
3569                         g_print ("converting shared method %s\n", method_name = mono_method_full_name (method_to_compile, TRUE));
3570                 else
3571                         g_print ("converting method %s\n", method_name = mono_method_full_name (method, TRUE));
3572                 */
3573                 g_free (method_name);
3574         }
3575
3576         if (cfg->opt & MONO_OPT_ABCREM)
3577                 cfg->opt |= MONO_OPT_SSA;
3578
3579         cfg->rs = mono_regstate_new ();
3580         cfg->next_vreg = cfg->rs->next_vreg;
3581
3582         /* FIXME: Fix SSA to handle branches inside bblocks */
3583         if (cfg->opt & MONO_OPT_SSA)
3584                 cfg->enable_extended_bblocks = FALSE;
3585
3586         /*
3587          * FIXME: This confuses liveness analysis because variables which are assigned after
3588          * a branch inside a bblock become part of the kill set, even though the assignment
3589          * might not get executed. This causes the optimize_initlocals pass to delete some
3590          * assignments which are needed.
3591          * Also, the mono_if_conversion pass needs to be modified to recognize the code
3592          * created by this.
3593          */
3594         //cfg->enable_extended_bblocks = TRUE;
3595
3596         /*We must verify the method before doing any IR generation as mono_compile_create_vars can assert.*/
3597         if (mono_compile_is_broken (cfg, cfg->method, TRUE)) {
3598                 if (mini_get_debug_options ()->break_on_unverified)
3599                         G_BREAKPOINT ();
3600                 return cfg;
3601         }
3602
3603         /*
3604          * create MonoInst* which represents arguments and local variables
3605          */
3606         mono_compile_create_vars (cfg);
3607
3608         i = mono_method_to_ir (cfg, method_to_compile, NULL, NULL, NULL, NULL, 0, FALSE);
3609
3610         if (i < 0) {
3611                 if (try_generic_shared && cfg->exception_type == MONO_EXCEPTION_GENERIC_SHARING_FAILED) {
3612                         if (compile_aot) {
3613                                 if (MONO_METHOD_COMPILE_END_ENABLED ())
3614                                         MONO_PROBE_METHOD_COMPILE_END (method, FALSE);
3615                                 return cfg;
3616                         }
3617                         mono_destroy_compile (cfg);
3618                         try_generic_shared = FALSE;
3619                         goto restart_compile;
3620                 }
3621                 g_assert (cfg->exception_type != MONO_EXCEPTION_GENERIC_SHARING_FAILED);
3622
3623                 if (MONO_METHOD_COMPILE_END_ENABLED ())
3624                         MONO_PROBE_METHOD_COMPILE_END (method, FALSE);
3625                 /* cfg contains the details of the failure, so let the caller cleanup */
3626                 return cfg;
3627         }
3628
3629         cfg->stat_basic_blocks += cfg->num_bblocks;
3630
3631         if (COMPILE_LLVM (cfg)) {
3632                 MonoInst *ins;
3633
3634                 /* The IR has to be in SSA form for LLVM */
3635                 cfg->opt |= MONO_OPT_SSA;
3636
3637                 // FIXME:
3638                 if (cfg->ret) {
3639                         // Allow SSA on the result value
3640                         cfg->ret->flags &= ~MONO_INST_VOLATILE;
3641
3642                         // Add an explicit return instruction referencing the return value
3643                         MONO_INST_NEW (cfg, ins, OP_SETRET);
3644                         ins->sreg1 = cfg->ret->dreg;
3645
3646                         MONO_ADD_INS (cfg->bb_exit, ins);
3647                 }
3648
3649                 cfg->opt &= ~MONO_OPT_LINEARS;
3650
3651                 /* FIXME: */
3652                 cfg->opt &= ~MONO_OPT_BRANCH;
3653         }
3654
3655         /* todo: remove code when we have verified that the liveness for try/catch blocks
3656          * works perfectly
3657          */
3658         /*
3659          * Currently, this can't be commented out since exception blocks are not
3660          * processed during liveness analysis.
3661          * It is also needed, because otherwise the local optimization passes would
3662          * delete assignments in cases like this:
3663          * r1 <- 1
3664          * <something which throws>
3665          * r1 <- 2
3666          * This also allows SSA to be run on methods containing exception clauses, since
3667          * SSA will ignore variables marked VOLATILE.
3668          */
3669         mono_liveness_handle_exception_clauses (cfg);
3670
3671         mono_handle_out_of_line_bblock (cfg);
3672
3673         /*g_print ("numblocks = %d\n", cfg->num_bblocks);*/
3674
3675         if (!COMPILE_LLVM (cfg))
3676                 mono_decompose_long_opts (cfg);
3677
3678         /* Should be done before branch opts */
3679         if (cfg->opt & (MONO_OPT_CONSPROP | MONO_OPT_COPYPROP))
3680                 mono_local_cprop (cfg);
3681
3682         if (cfg->opt & MONO_OPT_BRANCH)
3683                 mono_optimize_branches (cfg);
3684
3685         /* This must be done _before_ global reg alloc and _after_ decompose */
3686         mono_handle_global_vregs (cfg);
3687         if (cfg->opt & MONO_OPT_DEADCE)
3688                 mono_local_deadce (cfg);
3689         if (cfg->opt & MONO_OPT_ALIAS_ANALYSIS)
3690                 mono_local_alias_analysis (cfg);
3691         /* Disable this for LLVM to make the IR easier to handle */
3692         if (!COMPILE_LLVM (cfg))
3693                 mono_if_conversion (cfg);
3694
3695         mono_threads_safepoint ();
3696
3697         /* Depth-first ordering on basic blocks */
3698         cfg->bblocks = (MonoBasicBlock **)mono_mempool_alloc (cfg->mempool, sizeof (MonoBasicBlock*) * (cfg->num_bblocks + 1));
3699
3700         cfg->max_block_num = cfg->num_bblocks;
3701
3702         dfn = 0;
3703         df_visit (cfg->bb_entry, &dfn, cfg->bblocks);
3704         if (cfg->num_bblocks != dfn + 1) {
3705                 MonoBasicBlock *bb;
3706
3707                 cfg->num_bblocks = dfn + 1;
3708
3709                 /* remove unreachable code, because the code in them may be
3710                  * inconsistent  (access to dead variables for example) */
3711                 for (bb = cfg->bb_entry; bb; bb = bb->next_bb)
3712                         bb->flags &= ~BB_VISITED;
3713                 compute_reachable (cfg->bb_entry);
3714                 for (bb = cfg->bb_entry; bb; bb = bb->next_bb)
3715                         if (bb->flags & BB_EXCEPTION_HANDLER)
3716                                 compute_reachable (bb);
3717                 for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
3718                         if (!(bb->flags & BB_VISITED)) {
3719                                 if (cfg->verbose_level > 1)
3720                                         g_print ("found unreachable code in BB%d\n", bb->block_num);
3721                                 bb->code = bb->last_ins = NULL;
3722                                 while (bb->out_count)
3723                                         mono_unlink_bblock (cfg, bb, bb->out_bb [0]);
3724                         }
3725                 }
3726                 for (bb = cfg->bb_entry; bb; bb = bb->next_bb)
3727                         bb->flags &= ~BB_VISITED;
3728         }
3729
3730         if (((cfg->num_varinfo > 2000) || (cfg->num_bblocks > 1000)) && !cfg->compile_aot) {
3731                 /*
3732                  * we disable some optimizations if there are too many variables
3733                  * because JIT time may become too expensive. The actual number needs
3734                  * to be tweaked and eventually the non-linear algorithms should be fixed.
3735                  */
3736                 cfg->opt &= ~ (MONO_OPT_LINEARS | MONO_OPT_COPYPROP | MONO_OPT_CONSPROP);
3737                 cfg->disable_ssa = TRUE;
3738         }
3739
3740         if (cfg->opt & MONO_OPT_LOOP) {
3741                 mono_compile_dominator_info (cfg, MONO_COMP_DOM | MONO_COMP_IDOM);
3742                 mono_compute_natural_loops (cfg);
3743         }
3744
3745         mono_insert_safepoints (cfg);
3746
3747         /* after method_to_ir */
3748         if (parts == 1) {
3749                 if (MONO_METHOD_COMPILE_END_ENABLED ())
3750                         MONO_PROBE_METHOD_COMPILE_END (method, TRUE);
3751                 return cfg;
3752         }
3753
3754         /*
3755           if (header->num_clauses)
3756           cfg->disable_ssa = TRUE;
3757         */
3758
3759 //#define DEBUGSSA "logic_run"
3760 //#define DEBUGSSA_CLASS "Tests"
3761 #ifdef DEBUGSSA
3762
3763         if (!cfg->disable_ssa) {
3764                 mono_local_cprop (cfg);
3765
3766 #ifndef DISABLE_SSA
3767                 mono_ssa_compute (cfg);
3768 #endif
3769         }
3770 #else
3771         if (cfg->opt & MONO_OPT_SSA) {
3772                 if (!(cfg->comp_done & MONO_COMP_SSA) && !cfg->disable_ssa) {
3773 #ifndef DISABLE_SSA
3774                         mono_ssa_compute (cfg);
3775 #endif
3776
3777                         if (cfg->verbose_level >= 2) {
3778                                 print_dfn (cfg);
3779                         }
3780                 }
3781         }
3782 #endif
3783
3784         /* after SSA translation */
3785         if (parts == 2) {
3786                 if (MONO_METHOD_COMPILE_END_ENABLED ())
3787                         MONO_PROBE_METHOD_COMPILE_END (method, TRUE);
3788                 return cfg;
3789         }
3790
3791         if ((cfg->opt & MONO_OPT_CONSPROP) || (cfg->opt & MONO_OPT_COPYPROP)) {
3792                 if (cfg->comp_done & MONO_COMP_SSA && !COMPILE_LLVM (cfg)) {
3793 #ifndef DISABLE_SSA
3794                         mono_ssa_cprop (cfg);
3795 #endif
3796                 }
3797         }
3798
3799 #ifndef DISABLE_SSA
3800         if (cfg->comp_done & MONO_COMP_SSA && !COMPILE_LLVM (cfg)) {
3801                 //mono_ssa_strength_reduction (cfg);
3802
3803                 if (cfg->opt & MONO_OPT_DEADCE)
3804                         mono_ssa_deadce (cfg);
3805
3806                 if ((cfg->flags & (MONO_CFG_HAS_LDELEMA|MONO_CFG_HAS_CHECK_THIS)) && (cfg->opt & MONO_OPT_ABCREM))
3807                         mono_perform_abc_removal (cfg);
3808
3809                 mono_ssa_remove (cfg);
3810                 mono_local_cprop (cfg);
3811                 mono_handle_global_vregs (cfg);
3812                 if (cfg->opt & MONO_OPT_DEADCE)
3813                         mono_local_deadce (cfg);
3814
3815                 if (cfg->opt & MONO_OPT_BRANCH)
3816                         mono_optimize_branches (cfg);
3817         }
3818 #endif
3819
3820         if (cfg->comp_done & MONO_COMP_SSA && COMPILE_LLVM (cfg)) {
3821                 mono_ssa_loop_invariant_code_motion (cfg);
3822                 /* This removes MONO_INST_FAULT flags too so perform it unconditionally */
3823                 if (cfg->opt & MONO_OPT_ABCREM)
3824                         mono_perform_abc_removal (cfg);
3825         }
3826
3827         /* after SSA removal */
3828         if (parts == 3) {
3829                 if (MONO_METHOD_COMPILE_END_ENABLED ())
3830                         MONO_PROBE_METHOD_COMPILE_END (method, TRUE);
3831                 return cfg;
3832         }
3833
3834         if (cfg->llvm_only && cfg->gsharedvt)
3835                 mono_ssa_remove_gsharedvt (cfg);
3836
3837 #ifdef MONO_ARCH_SOFT_FLOAT_FALLBACK
3838         if (COMPILE_SOFT_FLOAT (cfg))
3839                 mono_decompose_soft_float (cfg);
3840 #endif
3841         mono_decompose_vtype_opts (cfg);
3842         if (cfg->flags & MONO_CFG_HAS_ARRAY_ACCESS)
3843                 mono_decompose_array_access_opts (cfg);
3844
3845         if (cfg->got_var) {
3846 #ifndef MONO_ARCH_GOT_REG
3847                 GList *regs;
3848 #endif
3849                 int got_reg;
3850
3851                 g_assert (cfg->got_var_allocated);
3852
3853                 /*
3854                  * Allways allocate the GOT var to a register, because keeping it
3855                  * in memory will increase the number of live temporaries in some
3856                  * code created by inssel.brg, leading to the well known spills+
3857                  * branches problem. Testcase: mcs crash in
3858                  * System.MonoCustomAttrs:GetCustomAttributes.
3859                  */
3860 #ifdef MONO_ARCH_GOT_REG
3861                 got_reg = MONO_ARCH_GOT_REG;
3862 #else
3863                 regs = mono_arch_get_global_int_regs (cfg);
3864                 g_assert (regs);
3865                 got_reg = GPOINTER_TO_INT (regs->data);
3866                 g_list_free (regs);
3867 #endif
3868                 cfg->got_var->opcode = OP_REGVAR;
3869                 cfg->got_var->dreg = got_reg;
3870                 cfg->used_int_regs |= 1LL << cfg->got_var->dreg;
3871         }
3872
3873         /*
3874          * Have to call this again to process variables added since the first call.
3875          */
3876         mono_liveness_handle_exception_clauses (cfg);
3877
3878         if (cfg->opt & MONO_OPT_LINEARS) {
3879                 GList *vars, *regs, *l;
3880
3881                 /* fixme: maybe we can avoid to compute livenesss here if already computed ? */
3882                 cfg->comp_done &= ~MONO_COMP_LIVENESS;
3883                 if (!(cfg->comp_done & MONO_COMP_LIVENESS))
3884                         mono_analyze_liveness (cfg);
3885
3886                 if ((vars = mono_arch_get_allocatable_int_vars (cfg))) {
3887                         regs = mono_arch_get_global_int_regs (cfg);
3888                         /* Remove the reg reserved for holding the GOT address */
3889                         if (cfg->got_var) {
3890                                 for (l = regs; l; l = l->next) {
3891                                         if (GPOINTER_TO_UINT (l->data) == cfg->got_var->dreg) {
3892                                                 regs = g_list_delete_link (regs, l);
3893                                                 break;
3894                                         }
3895                                 }
3896                         }
3897                         mono_linear_scan (cfg, vars, regs, &cfg->used_int_regs);
3898                 }
3899         }
3900
3901         //mono_print_code (cfg, "");
3902
3903     //print_dfn (cfg);
3904
3905         /* variables are allocated after decompose, since decompose could create temps */
3906         if (!COMPILE_LLVM (cfg)) {
3907                 mono_arch_allocate_vars (cfg);
3908                 if (cfg->exception_type)
3909                         return cfg;
3910         }
3911
3912         {
3913                 MonoBasicBlock *bb;
3914                 gboolean need_local_opts;
3915
3916                 if (cfg->gsharedvt)
3917                         mono_allocate_gsharedvt_vars (cfg);
3918
3919                 if (!COMPILE_LLVM (cfg)) {
3920                         mono_spill_global_vars (cfg, &need_local_opts);
3921
3922                         if (need_local_opts || cfg->compile_aot) {
3923                                 /* To optimize code created by spill_global_vars */
3924                                 mono_local_cprop (cfg);
3925                                 if (cfg->opt & MONO_OPT_DEADCE)
3926                                         mono_local_deadce (cfg);
3927                         }
3928                 }
3929
3930                 /* Add branches between non-consecutive bblocks */
3931                 for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
3932                         if (bb->last_ins && MONO_IS_COND_BRANCH_OP (bb->last_ins) &&
3933                                 bb->last_ins->inst_false_bb && bb->next_bb != bb->last_ins->inst_false_bb) {
3934                                 /* we are careful when inverting, since bugs like #59580
3935                                  * could show up when dealing with NaNs.
3936                                  */
3937                                 if (MONO_IS_COND_BRANCH_NOFP(bb->last_ins) && bb->next_bb == bb->last_ins->inst_true_bb) {
3938                                         MonoBasicBlock *tmp =  bb->last_ins->inst_true_bb;
3939                                         bb->last_ins->inst_true_bb = bb->last_ins->inst_false_bb;
3940                                         bb->last_ins->inst_false_bb = tmp;
3941
3942                                         bb->last_ins->opcode = mono_reverse_branch_op (bb->last_ins->opcode);
3943                                 } else {
3944                                         MonoInst *inst = (MonoInst *)mono_mempool_alloc0 (cfg->mempool, sizeof (MonoInst));
3945                                         inst->opcode = OP_BR;
3946                                         inst->inst_target_bb = bb->last_ins->inst_false_bb;
3947                                         mono_bblock_add_inst (bb, inst);
3948                                 }
3949                         }
3950                 }
3951
3952                 if (cfg->verbose_level >= 4) {
3953                         for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
3954                                 MonoInst *tree = bb->code;
3955                                 g_print ("DUMP BLOCK %d:\n", bb->block_num);
3956                                 if (!tree)
3957                                         continue;
3958                                 for (; tree; tree = tree->next) {
3959                                         mono_print_ins_index (-1, tree);
3960                                 }
3961                         }
3962                 }
3963
3964                 /* FIXME: */
3965                 for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
3966                         bb->max_vreg = cfg->next_vreg;
3967                 }
3968         }
3969
3970         if (COMPILE_LLVM (cfg)) {
3971 #ifdef ENABLE_LLVM
3972                 char *nm;
3973
3974                 /* The IR has to be in SSA form for LLVM */
3975                 if (!(cfg->comp_done & MONO_COMP_SSA)) {
3976                         cfg->exception_message = g_strdup ("SSA disabled.");
3977                         cfg->disable_llvm = TRUE;
3978                 }
3979
3980                 if (cfg->flags & MONO_CFG_HAS_ARRAY_ACCESS)
3981                         mono_decompose_array_access_opts (cfg);
3982
3983                 if (!cfg->disable_llvm)
3984                         mono_llvm_emit_method (cfg);
3985                 if (cfg->disable_llvm) {
3986                         if (cfg->verbose_level >= (cfg->llvm_only ? 0 : 1)) {
3987                                 //nm = mono_method_full_name (cfg->method, TRUE);
3988                                 printf ("LLVM failed for '%s': %s\n", method->name, cfg->exception_message);
3989                                 //g_free (nm);
3990                         }
3991                         if (cfg->llvm_only) {
3992                                 cfg->disable_aot = TRUE;
3993                                 return cfg;
3994                         }
3995                         mono_destroy_compile (cfg);
3996                         try_llvm = FALSE;
3997                         goto restart_compile;
3998                 }
3999
4000                 if (cfg->verbose_level > 0 && !cfg->compile_aot) {
4001                         nm = mono_method_full_name (cfg->method, TRUE);
4002                         g_print ("LLVM Method %s emitted at %p to %p (code length %d) [%s]\n",
4003                                          nm,
4004                                          cfg->native_code, cfg->native_code + cfg->code_len, cfg->code_len, cfg->domain->friendly_name);
4005                         g_free (nm);
4006                 }
4007 #endif
4008         } else {
4009                 mono_codegen (cfg);
4010         }
4011
4012         if (COMPILE_LLVM (cfg))
4013                 InterlockedIncrement (&mono_jit_stats.methods_with_llvm);
4014         else
4015                 InterlockedIncrement (&mono_jit_stats.methods_without_llvm);
4016
4017         cfg->jit_info = create_jit_info (cfg, method_to_compile);
4018
4019 #ifdef MONO_ARCH_HAVE_LIVERANGE_OPS
4020         if (cfg->extend_live_ranges) {
4021                 /* Extend live ranges to cover the whole method */
4022                 for (i = 0; i < cfg->num_varinfo; ++i)
4023                         MONO_VARINFO (cfg, i)->live_range_end = cfg->code_len;
4024         }
4025 #endif
4026
4027         if (!cfg->compile_aot)
4028                 mono_save_xdebug_info (cfg);
4029
4030         mini_gc_create_gc_map (cfg);
4031
4032         mono_save_seq_point_info (cfg);
4033
4034         if (cfg->verbose_level >= 2) {
4035                 char *id =  mono_method_full_name (cfg->method, FALSE);
4036                 mono_disassemble_code (cfg, cfg->native_code, cfg->code_len, id + 3);
4037                 g_free (id);
4038         }
4039
4040         if (!cfg->compile_aot) {
4041                 mono_domain_lock (cfg->domain);
4042                 mono_jit_info_table_add (cfg->domain, cfg->jit_info);
4043
4044                 if (cfg->method->dynamic)
4045                         mono_dynamic_code_hash_lookup (cfg->domain, cfg->method)->ji = cfg->jit_info;
4046                 mono_domain_unlock (cfg->domain);
4047         }
4048
4049 #if 0
4050         if (cfg->gsharedvt)
4051                 printf ("GSHAREDVT: %s\n", mono_method_full_name (cfg->method, TRUE));
4052 #endif
4053
4054         /* collect statistics */
4055 #ifndef DISABLE_PERFCOUNTERS
4056         mono_perfcounters->jit_methods++;
4057         mono_perfcounters->jit_bytes += header->code_size;
4058 #endif
4059         mono_jit_stats.allocated_code_size += cfg->code_len;
4060         code_size_ratio = cfg->code_len;
4061         if (code_size_ratio > mono_jit_stats.biggest_method_size && mono_jit_stats.enabled) {
4062                 mono_jit_stats.biggest_method_size = code_size_ratio;
4063                 g_free (mono_jit_stats.biggest_method);
4064                 mono_jit_stats.biggest_method = g_strdup_printf ("%s::%s)", method->klass->name, method->name);
4065         }
4066         code_size_ratio = (code_size_ratio * 100) / header->code_size;
4067         if (code_size_ratio > mono_jit_stats.max_code_size_ratio && mono_jit_stats.enabled) {
4068                 mono_jit_stats.max_code_size_ratio = code_size_ratio;
4069                 g_free (mono_jit_stats.max_ratio_method);
4070                 mono_jit_stats.max_ratio_method = g_strdup_printf ("%s::%s)", method->klass->name, method->name);
4071         }
4072         mono_jit_stats.native_code_size += cfg->code_len;
4073
4074         if (MONO_METHOD_COMPILE_END_ENABLED ())
4075                 MONO_PROBE_METHOD_COMPILE_END (method, TRUE);
4076
4077         return cfg;
4078 }
4079
4080 void*
4081 mono_arch_instrument_epilog (MonoCompile *cfg, void *func, void *p, gboolean enable_arguments)
4082 {
4083         return mono_arch_instrument_epilog_full (cfg, func, p, enable_arguments, FALSE);
4084 }
4085
4086 void
4087 mono_cfg_add_try_hole (MonoCompile *cfg, MonoExceptionClause *clause, guint8 *start, MonoBasicBlock *bb)
4088 {
4089         TryBlockHole *hole = (TryBlockHole *)mono_mempool_alloc (cfg->mempool, sizeof (TryBlockHole));
4090         hole->clause = clause;
4091         hole->start_offset = start - cfg->native_code;
4092         hole->basic_block = bb;
4093
4094         cfg->try_block_holes = g_slist_append_mempool (cfg->mempool, cfg->try_block_holes, hole);
4095 }
4096
4097 void
4098 mono_cfg_set_exception (MonoCompile *cfg, int type)
4099 {
4100         cfg->exception_type = type;
4101 }
4102
4103 #endif /* DISABLE_JIT */
4104
4105 static MonoJitInfo*
4106 create_jit_info_for_trampoline (MonoMethod *wrapper, MonoTrampInfo *info)
4107 {
4108         MonoDomain *domain = mono_get_root_domain ();
4109         MonoJitInfo *jinfo;
4110         guint8 *uw_info;
4111         guint32 info_len;
4112
4113         if (info->uw_info) {
4114                 uw_info = info->uw_info;
4115                 info_len = info->uw_info_len;
4116         } else {
4117                 uw_info = mono_unwind_ops_encode (info->unwind_ops, &info_len);
4118         }
4119
4120         jinfo = (MonoJitInfo *)mono_domain_alloc0 (domain, MONO_SIZEOF_JIT_INFO);
4121         jinfo->d.method = wrapper;
4122         jinfo->code_start = info->code;
4123         jinfo->code_size = info->code_size;
4124         jinfo->unwind_info = mono_cache_unwind_info (uw_info, info_len);
4125
4126         if (!info->uw_info)
4127                 g_free (uw_info);
4128
4129         return jinfo;
4130 }
4131
4132 /*
4133  * mono_jit_compile_method_inner:
4134  *
4135  *   Main entry point for the JIT.
4136  */
4137 gpointer
4138 mono_jit_compile_method_inner (MonoMethod *method, MonoDomain *target_domain, int opt, MonoException **jit_ex)
4139 {
4140         MonoCompile *cfg;
4141         gpointer code = NULL;
4142         MonoJitInfo *jinfo, *info;
4143         MonoVTable *vtable;
4144         MonoException *ex = NULL;
4145         guint32 prof_options;
4146         GTimer *jit_timer;
4147         MonoMethod *prof_method, *shared;
4148
4149         if ((method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) ||
4150             (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL)) {
4151                 MonoMethod *nm;
4152                 MonoMethodPInvoke* piinfo = (MonoMethodPInvoke *) method;
4153
4154                 if (!piinfo->addr) {
4155                         if (method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL)
4156                                 piinfo->addr = mono_lookup_internal_call (method);
4157                         else if (method->iflags & METHOD_IMPL_ATTRIBUTE_NATIVE)
4158 #ifdef HOST_WIN32
4159                                 g_warning ("Method '%s' in assembly '%s' contains native code that cannot be executed by Mono in modules loaded from byte arrays. The assembly was probably created using C++/CLI.\n", mono_method_full_name (method, TRUE), method->klass->image->name);
4160 #else
4161                                 g_warning ("Method '%s' in assembly '%s' contains native code that cannot be executed by Mono on this platform. The assembly was probably created using C++/CLI.\n", mono_method_full_name (method, TRUE), method->klass->image->name);
4162 #endif
4163                         else
4164                                 mono_lookup_pinvoke_call (method, NULL, NULL);
4165                 }
4166                 nm = mono_marshal_get_native_wrapper (method, TRUE, mono_aot_only);
4167                 code = mono_get_addr_from_ftnptr (mono_compile_method (nm));
4168                 jinfo = mono_jit_info_table_find (target_domain, (char *)code);
4169                 if (!jinfo)
4170                         jinfo = mono_jit_info_table_find (mono_domain_get (), (char *)code);
4171                 if (jinfo)
4172                         mono_profiler_method_end_jit (method, jinfo, MONO_PROFILE_OK);
4173                 return code;
4174         } else if ((method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME)) {
4175                 const char *name = method->name;
4176                 char *full_name, *msg;
4177                 MonoMethod *nm;
4178
4179                 if (method->klass->parent == mono_defaults.multicastdelegate_class) {
4180                         if (*name == '.' && (strcmp (name, ".ctor") == 0)) {
4181                                 MonoJitICallInfo *mi = mono_find_jit_icall_by_name ("mono_delegate_ctor");
4182                                 g_assert (mi);
4183                                 /*
4184                                  * We need to make sure this wrapper
4185                                  * is compiled because it might end up
4186                                  * in an (M)RGCTX if generic sharing
4187                                  * is enabled, and would be called
4188                                  * indirectly.  If it were a
4189                                  * trampoline we'd try to patch that
4190                                  * indirect call, which is not
4191                                  * possible.
4192                                  */
4193                                 return mono_get_addr_from_ftnptr ((gpointer)mono_icall_get_wrapper_full (mi, TRUE));
4194                         } else if (*name == 'I' && (strcmp (name, "Invoke") == 0)) {
4195                                 if (mono_llvm_only) {
4196                                         nm = mono_marshal_get_delegate_invoke (method, NULL);
4197                                         return mono_get_addr_from_ftnptr (mono_compile_method (nm));
4198                                 }
4199                                 return mono_create_delegate_trampoline (target_domain, method->klass);
4200                         } else if (*name == 'B' && (strcmp (name, "BeginInvoke") == 0)) {
4201                                 nm = mono_marshal_get_delegate_begin_invoke (method);
4202                                 return mono_get_addr_from_ftnptr (mono_compile_method (nm));
4203                         } else if (*name == 'E' && (strcmp (name, "EndInvoke") == 0)) {
4204                                 nm = mono_marshal_get_delegate_end_invoke (method);
4205                                 return mono_get_addr_from_ftnptr (mono_compile_method (nm));
4206                         }
4207                 }
4208
4209                 full_name = mono_method_full_name (method, TRUE);
4210                 msg = g_strdup_printf ("Unrecognizable runtime implemented method '%s'", full_name);
4211                 *jit_ex = mono_exception_from_name_msg (mono_defaults.corlib, "System", "InvalidProgramException", msg);
4212                 g_free (full_name);
4213                 g_free (msg);
4214                 return NULL;
4215         }
4216
4217         if (method->wrapper_type == MONO_WRAPPER_UNKNOWN) {
4218                 WrapperInfo *info = mono_marshal_get_wrapper_info (method);
4219
4220                 if (info->subtype == WRAPPER_SUBTYPE_GSHAREDVT_IN || info->subtype == WRAPPER_SUBTYPE_GSHAREDVT_OUT) {
4221                         static MonoTrampInfo *in_tinfo, *out_tinfo;
4222                         MonoTrampInfo *tinfo;
4223                         MonoJitInfo *jinfo;
4224                         gboolean is_in = info->subtype == WRAPPER_SUBTYPE_GSHAREDVT_IN;
4225
4226                         if (is_in && in_tinfo)
4227                                 return in_tinfo->code;
4228                         else if (!is_in && out_tinfo)
4229                                 return out_tinfo->code;
4230
4231                         /*
4232                          * This is a special wrapper whose body is implemented in assembly, like a trampoline. We use a wrapper so EH
4233                          * works.
4234                          * FIXME: The caller signature doesn't match the callee, which might cause problems on some platforms
4235                          */
4236                         if (mono_aot_only)
4237                                 mono_aot_get_trampoline_full (is_in ? "gsharedvt_trampoline" : "gsharedvt_out_trampoline", &tinfo);
4238                         else
4239                                 mono_arch_get_gsharedvt_trampoline (&tinfo, FALSE);
4240                         jinfo = create_jit_info_for_trampoline (method, tinfo);
4241                         mono_jit_info_table_add (mono_get_root_domain (), jinfo);
4242                         if (is_in)
4243                                 in_tinfo = tinfo;
4244                         else
4245                                 out_tinfo = tinfo;
4246                         return tinfo->code;
4247                 }
4248         }
4249
4250         if (mono_aot_only) {
4251                 char *fullname = mono_method_full_name (method, TRUE);
4252                 char *msg = g_strdup_printf ("Attempting to JIT compile method '%s' while running with --aot-only. See http://docs.xamarin.com/ios/about/limitations for more information.\n", fullname);
4253
4254                 *jit_ex = mono_get_exception_execution_engine (msg);
4255                 g_free (fullname);
4256                 g_free (msg);
4257
4258                 return NULL;
4259         }
4260
4261         jit_timer = g_timer_new ();
4262
4263         cfg = mini_method_compile (method, opt, target_domain, JIT_FLAG_RUN_CCTORS, 0, -1);
4264         prof_method = cfg->method;
4265
4266         g_timer_stop (jit_timer);
4267         mono_jit_stats.jit_time += g_timer_elapsed (jit_timer, NULL);
4268         g_timer_destroy (jit_timer);
4269
4270         switch (cfg->exception_type) {
4271         case MONO_EXCEPTION_NONE:
4272                 break;
4273         case MONO_EXCEPTION_TYPE_LOAD:
4274         case MONO_EXCEPTION_MISSING_FIELD:
4275         case MONO_EXCEPTION_MISSING_METHOD:
4276         case MONO_EXCEPTION_FILE_NOT_FOUND:
4277         case MONO_EXCEPTION_BAD_IMAGE: {
4278                 /* Throw a type load exception if needed */
4279                 MonoLoaderError *error = mono_loader_get_last_error ();
4280
4281                 if (error) {
4282                         ex = mono_loader_error_prepare_exception (error);
4283                 } else {
4284                         if (cfg->exception_ptr) {
4285                                 ex = mono_class_get_exception_for_failure ((MonoClass *)cfg->exception_ptr);
4286                         } else {
4287                                 if (cfg->exception_type == MONO_EXCEPTION_MISSING_FIELD)
4288                                         ex = mono_exception_from_name_msg (mono_defaults.corlib, "System", "MissingFieldException", cfg->exception_message);
4289                                 else if (cfg->exception_type == MONO_EXCEPTION_MISSING_METHOD)
4290                                         ex = mono_exception_from_name_msg (mono_defaults.corlib, "System", "MissingMethodException", cfg->exception_message);
4291                                 else if (cfg->exception_type == MONO_EXCEPTION_TYPE_LOAD)
4292                                         ex = mono_exception_from_name_msg (mono_defaults.corlib, "System", "TypeLoadException", cfg->exception_message);
4293                                 else if (cfg->exception_type == MONO_EXCEPTION_FILE_NOT_FOUND)
4294                                         ex = mono_exception_from_name_msg (mono_defaults.corlib, "System.IO", "FileNotFoundException", cfg->exception_message);
4295                                 else if (cfg->exception_type == MONO_EXCEPTION_BAD_IMAGE)
4296                                         ex = mono_get_exception_bad_image_format (cfg->exception_message);
4297                                 else
4298                                         g_assert_not_reached ();
4299                         }
4300                 }
4301                 break;
4302         }
4303         case MONO_EXCEPTION_INVALID_PROGRAM:
4304                 ex = mono_exception_from_name_msg (mono_defaults.corlib, "System", "InvalidProgramException", cfg->exception_message);
4305                 break;
4306         case MONO_EXCEPTION_UNVERIFIABLE_IL:
4307                 ex = mono_exception_from_name_msg (mono_defaults.corlib, "System.Security", "VerificationException", cfg->exception_message);
4308                 break;
4309         case MONO_EXCEPTION_METHOD_ACCESS:
4310                 ex = mono_exception_from_name_msg (mono_defaults.corlib, "System", "MethodAccessException", cfg->exception_message);
4311                 break;
4312         case MONO_EXCEPTION_FIELD_ACCESS:
4313                 ex = mono_exception_from_name_msg (mono_defaults.corlib, "System", "FieldAccessException", cfg->exception_message);
4314                 break;
4315         case MONO_EXCEPTION_OBJECT_SUPPLIED: {
4316                 MonoException *exp = (MonoException *)cfg->exception_ptr;
4317                 MONO_GC_UNREGISTER_ROOT (cfg->exception_ptr);
4318
4319                 ex = exp;
4320                 break;
4321         }
4322         case MONO_EXCEPTION_OUT_OF_MEMORY:
4323                 ex = mono_domain_get ()->out_of_memory_ex;
4324                 break;
4325         case MONO_EXCEPTION_MONO_ERROR:
4326                 g_assert (!mono_error_ok (&cfg->error));
4327                 ex = mono_error_convert_to_exception (&cfg->error);
4328                 break;
4329         default:
4330                 g_assert_not_reached ();
4331         }
4332
4333         if (ex) {
4334                 if (cfg->prof_options & MONO_PROFILE_JIT_COMPILATION)
4335                         mono_profiler_method_end_jit (method, NULL, MONO_PROFILE_FAILED);
4336
4337                 mono_destroy_compile (cfg);
4338                 *jit_ex = ex;
4339
4340                 return NULL;
4341         }
4342
4343         if (mono_method_is_generic_sharable (method, FALSE))
4344                 shared = mini_get_shared_method (method);
4345         else
4346                 shared = NULL;
4347
4348         mono_domain_lock (target_domain);
4349
4350         /* Check if some other thread already did the job. In this case, we can
4351        discard the code this thread generated. */
4352
4353         info = mini_lookup_method (target_domain, method, shared);
4354         if (info) {
4355                 /* We can't use a domain specific method in another domain */
4356                 if ((target_domain == mono_domain_get ()) || info->domain_neutral) {
4357                         code = info->code_start;
4358 //                      printf("Discarding code for method %s\n", method->name);
4359                 }
4360         }
4361         if (code == NULL) {
4362                 /* The lookup + insert is atomic since this is done inside the domain lock */
4363                 mono_domain_jit_code_hash_lock (target_domain);
4364                 mono_internal_hash_table_insert (&target_domain->jit_code_hash, cfg->jit_info->d.method, cfg->jit_info);
4365                 mono_domain_jit_code_hash_unlock (target_domain);
4366
4367                 code = cfg->native_code;
4368
4369                 if (cfg->gshared && mono_method_is_generic_sharable (method, FALSE))
4370                         mono_stats.generics_shared_methods++;
4371                 if (cfg->gsharedvt)
4372                         mono_stats.gsharedvt_methods++;
4373         }
4374
4375         jinfo = cfg->jit_info;
4376
4377         prof_options = cfg->prof_options;
4378
4379         /*
4380          * Update global stats while holding a lock, instead of doing many
4381          * InterlockedIncrement operations during JITting.
4382          */
4383         mono_jit_stats.allocate_var += cfg->stat_allocate_var;
4384         mono_jit_stats.locals_stack_size += cfg->stat_locals_stack_size;
4385         mono_jit_stats.basic_blocks += cfg->stat_basic_blocks;
4386         mono_jit_stats.max_basic_blocks = MAX (cfg->stat_basic_blocks, mono_jit_stats.max_basic_blocks);
4387         mono_jit_stats.cil_code_size += cfg->stat_cil_code_size;
4388         mono_jit_stats.regvars += cfg->stat_n_regvars;
4389         mono_jit_stats.inlineable_methods += cfg->stat_inlineable_methods;
4390         mono_jit_stats.inlined_methods += cfg->stat_inlined_methods;
4391         mono_jit_stats.code_reallocs += cfg->stat_code_reallocs;
4392
4393         mono_destroy_compile (cfg);
4394
4395 #ifndef DISABLE_JIT
4396         if (domain_jit_info (target_domain)->jump_target_hash) {
4397                 MonoJumpInfo patch_info;
4398                 MonoJumpList *jlist;
4399                 GSList *tmp;
4400                 jlist = (MonoJumpList *)g_hash_table_lookup (domain_jit_info (target_domain)->jump_target_hash, method);
4401                 if (jlist) {
4402                         patch_info.next = NULL;
4403                         patch_info.ip.i = 0;
4404                         patch_info.type = MONO_PATCH_INFO_METHOD_JUMP;
4405                         patch_info.data.method = method;
4406                         g_hash_table_remove (domain_jit_info (target_domain)->jump_target_hash, method);
4407
4408 #if defined(__native_client_codegen__) && defined(__native_client__)
4409                         /* These patches are applied after a method has been installed, no target munging is needed. */
4410                         nacl_allow_target_modification (FALSE);
4411 #endif
4412 #ifdef MONO_ARCH_HAVE_PATCH_CODE_NEW
4413                         for (tmp = jlist->list; tmp; tmp = tmp->next) {
4414                                 gpointer target = mono_resolve_patch_target (NULL, target_domain, (guint8 *)tmp->data, &patch_info, TRUE);
4415                                 mono_arch_patch_code_new (NULL, target_domain, (guint8 *)tmp->data, &patch_info, target);
4416                         }
4417 #else
4418                         for (tmp = jlist->list; tmp; tmp = tmp->next)
4419                                 mono_arch_patch_code (NULL, NULL, target_domain, tmp->data, &patch_info, TRUE);
4420 #endif
4421 #if defined(__native_client_codegen__) && defined(__native_client__)
4422                         nacl_allow_target_modification (TRUE);
4423 #endif
4424                 }
4425         }
4426
4427         mono_emit_jit_map (jinfo);
4428 #endif
4429         mono_domain_unlock (target_domain);
4430
4431         vtable = mono_class_vtable (target_domain, method->klass);
4432         if (!vtable) {
4433                 ex = mono_class_get_exception_for_failure (method->klass);
4434                 g_assert (ex);
4435                 *jit_ex = ex;
4436                 return NULL;
4437         }
4438
4439         if (prof_options & MONO_PROFILE_JIT_COMPILATION) {
4440                 if (method->wrapper_type == MONO_WRAPPER_MANAGED_TO_NATIVE) {
4441                         if (mono_marshal_method_from_wrapper (method)) {
4442                                 /* Native func wrappers have no method */
4443                                 /* The profiler doesn't know about wrappers, so pass the original icall method */
4444                                 mono_profiler_method_end_jit (mono_marshal_method_from_wrapper (method), jinfo, MONO_PROFILE_OK);
4445                         }
4446                 }
4447                 mono_profiler_method_end_jit (method, jinfo, MONO_PROFILE_OK);
4448                 if (prof_method != method) {
4449                         mono_profiler_method_end_jit (prof_method, jinfo, MONO_PROFILE_OK);
4450                 }
4451         }
4452
4453         ex = mono_runtime_class_init_full (vtable, FALSE);
4454         if (ex) {
4455                 *jit_ex = ex;
4456                 return NULL;
4457         }
4458         return code;
4459 }
4460
4461 /*
4462  * mini_get_underlying_type:
4463  *
4464  *   Return the type the JIT will use during compilation.
4465  * Handles: byref, enums, native types, generic sharing.
4466  * For gsharedvt types, it will return the original VAR/MVAR.
4467  */
4468 MonoType*
4469 mini_get_underlying_type (MonoType *type)
4470 {
4471         return mini_type_get_underlying_type (type);
4472 }
4473
4474 void
4475 mini_jit_init (void)
4476 {
4477         mono_os_mutex_init_recursive (&jit_mutex);
4478 #ifndef DISABLE_JIT
4479         current_backend = g_new0 (MonoBackend, 1);
4480         init_backend (current_backend);
4481 #endif
4482 }
4483
4484 void
4485 mini_jit_cleanup (void)
4486 {
4487 #ifndef DISABLE_JIT
4488         g_free (emul_opcode_map);
4489         g_free (emul_opcode_opcodes);
4490 #endif
4491 }
4492
4493 #ifndef ENABLE_LLVM
4494 void
4495 mono_llvm_emit_aot_file_info (MonoAotFileInfo *info, gboolean has_jitted_code)
4496 {
4497         g_assert_not_reached ();
4498 }
4499
4500 void mono_llvm_emit_aot_data (const char *symbol, guint8 *data, int data_len)
4501 {
4502         g_assert_not_reached ();
4503 }
4504
4505 #endif
4506
4507 #if !defined(ENABLE_LLVM_RUNTIME) && !defined(ENABLE_LLVM)
4508
4509 void
4510 mono_llvm_cpp_throw_exception (void)
4511 {
4512         g_assert_not_reached ();
4513 }
4514
4515 #endif
4516
4517 #ifdef DISABLE_JIT
4518
4519 MonoCompile*
4520 mini_method_compile (MonoMethod *method, guint32 opts, MonoDomain *domain, JitFlags flags, int parts, int aot_method_index)
4521 {
4522         g_assert_not_reached ();
4523         return NULL;
4524 }
4525
4526 void
4527 mono_destroy_compile (MonoCompile *cfg)
4528 {
4529         g_assert_not_reached ();
4530 }
4531
4532 void
4533 mono_add_patch_info (MonoCompile *cfg, int ip, MonoJumpInfoType type, gconstpointer target)
4534 {
4535         g_assert_not_reached ();
4536 }
4537
4538 #endif /* DISABLE_JIT */