src/vm/jit/intrp/asmpart.c

   1 /* src/vm/jit/intrp/asmpart.c - Java-C interface functions for Interpreter
   2
   3    Copyright (C) 1996-2005, 2006, 2007 R. Grafl, A. Krall, C. Kruegel,
   4    C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
   5    E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
   6    J. Wenninger, Institut f. Computersprachen - TU Wien
   7
   8    This file is part of CACAO.
   9
  10    This program is free software; you can redistribute it and/or
  11    modify it under the terms of the GNU General Public License as
  12    published by the Free Software Foundation; either version 2, or (at
  13    your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful, but
  16    WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18    General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  23    02110-1301, USA.
  24
  25 */
  26
  27
  28 #include "config.h"
  29
  30 #include <assert.h>
  31
  32 #include "vm/types.h"
  33
  34 #include "arch.h"
  35
  36 #if defined(ENABLE_THREADS)
  37 # include "threads/native/threads.h"
  38 #else
  39 # include "threads/none/threads.h"
  40 #endif
  41
  42 #include "vm/builtin.h"
  43 #include "vm/exceptions.h"
  44
  45 #include "vm/jit/asmpart.h"
  46 #include "vm/jit/methodheader.h"
  47 #include "vm/jit/intrp/intrp.h"
  48 #include "vm/jit/dseg.h"
  49
  50 #include "vmcore/class.h"
  51 #include "vmcore/linker.h"
  52 #include "vmcore/loader.h"
  53 #include "vmcore/options.h"
  54
  55 #if defined(ENABLE_VMLOG)
  56 #include <vmlog_cacao.h>
  57 #endif
  58
  59
  60 static bool intrp_asm_vm_call_method_intern(methodinfo *m, s4 vmargscount,
  61                                                                                         vm_arg *vmargs)
  62 {
  63         java_objectheader *retval;
  64         Cell              *sp;
  65         s4                 i;
  66         u1                *entrypoint;
  67
  68         sp = global_sp;
  69         CLEAR_global_sp;
  70
  71         assert(sp != NULL);
  72
  73         for (i = 0; i < vmargscount; i++) {
  74                 switch (vmargs[i].type) {
  75                 case TYPE_INT:
  76                 case TYPE_FLT:
  77                 case TYPE_ADR:
  78                         *(--sp) = (Cell) vmargs[i].data.l;
  79                         break;
  80                 case TYPE_LNG:
  81                 case TYPE_DBL:
  82                         sp -= 2;
  83                         *((u8 *) sp) = vmargs[i].data.l;
  84                         break;
  85                 }
  86         }
  87
  88         entrypoint = createcalljavafunction(m);
  89
  90         retval = engine((Inst *) entrypoint, sp, NULL);
  91
  92         /* XXX remove the method from the method table */
  93
  94         if (retval != NULL) {
  95                 (void)builtin_throw_exception(retval);
  96                 return false;
  97         }
  98         else
  99                 return true;
 100 }
 101
 102
 103 java_objectheader *intrp_asm_vm_call_method(methodinfo *m, s4 vmargscount,
 104                                                                                         vm_arg *vmargs)
 105 {
 106         java_objectheader *retval = NULL;
 107
 108         if (intrp_asm_vm_call_method_intern(m, vmargscount, vmargs)) {
 109                 if (m->parseddesc->returntype.type == TYPE_ADR)
 110                         retval = (java_objectheader *)*global_sp++;
 111                 else
 112                         assert(m->parseddesc->returntype.type == TYPE_VOID);
 113                 return retval;
 114         } else
 115                 return NULL;
 116 }
 117
 118
 119 s4 intrp_asm_vm_call_method_int(methodinfo *m, s4 vmargscount, vm_arg *vmargs)
 120 {
 121         s4 retval = 0;
 122
 123         if (intrp_asm_vm_call_method_intern(m, vmargscount, vmargs)) {
 124                 if (m->parseddesc->returntype.type == TYPE_INT)
 125                         retval = *global_sp++;
 126                 else
 127                         assert(m->parseddesc->returntype.type == TYPE_VOID);
 128                 return retval;
 129         } else
 130                 return 0;
 131 }
 132
 133
 134 s8 intrp_asm_vm_call_method_long(methodinfo *m, s4 vmargscount, vm_arg *vmargs)
 135 {
 136         s8 retval;
 137
 138         assert(m->parseddesc->returntype.type == TYPE_LNG);
 139
 140         if (intrp_asm_vm_call_method_intern(m, vmargscount, vmargs)) {
 141                 retval = *(s8 *)global_sp;
 142                 global_sp += 2;
 143                 return retval;
 144         } else
 145                 return 0;
 146 }
 147
 148
 149 float intrp_asm_vm_call_method_float(methodinfo *m, s4 vmargscount,
 150                                                                          vm_arg *vmargs)
 151 {
 152         float retval;
 153
 154         assert(m->parseddesc->returntype.type == TYPE_FLT);
 155
 156         if (intrp_asm_vm_call_method_intern(m, vmargscount, vmargs)) {
 157                 retval = *(float *)global_sp;
 158                 global_sp += 1;
 159                 return retval;
 160         } else
 161                 return 0.0;
 162 }
 163
 164
 165 double intrp_asm_vm_call_method_double(methodinfo *m, s4 vmargscount,
 166                                                                            vm_arg *vmargs)
 167 {
 168         double retval;
 169
 170         assert(m->parseddesc->returntype.type == TYPE_DBL);
 171
 172         if (intrp_asm_vm_call_method_intern(m, vmargscount, vmargs)) {
 173                 retval = *(double *)global_sp;
 174                 global_sp += 2;
 175                 return retval;
 176         } else
 177                 return 0.0;
 178 }
 179
 180
 181 Inst *intrp_asm_handle_exception(Inst *ip, java_objectheader *o, Cell *fp, Cell **new_spp, Cell **new_fpp)
 182 {
 183         classinfo            *c;
 184         classref_or_classinfo cr;
 185         s4                    framesize;
 186         s4                    issync;
 187         dseg_exception_entry *ex;
 188         s4                    exceptiontablelength;
 189         s4                    i;
 190
 191   /* for a description of the stack see IRETURN in java.vmg */
 192
 193   for (; fp != NULL; ) {
 194           u1 *f = codegen_get_pv_from_pc((u1 *) (ip - 1));
 195
 196           /* get methodinfo pointer from method header */
 197
 198           codeinfo *code = *((codeinfo **) ((u1 *)f + CodeinfoPointer));
 199           methodinfo *m = code->m;
 200
 201           framesize            = *((s4 *)             (((u1 *) f) + FrameSize));
 202           issync               = *((s4 *)             (((u1 *) f) + IsSync));
 203           ex                   =   (dseg_exception_entry *)
 204                                                                                                   (((u1 *) f) + ExTableStart);
 205           exceptiontablelength = *((s4 *)             (((u1 *) f) + ExTableSize));
 206
 207 #if !defined(NDEBUG)
 208           if (opt_verbose || opt_verbosecall || opt_verboseexception)
 209                   builtin_trace_exception(o, m, ip, 1);
 210 #endif
 211
 212 #if defined(ENABLE_VMLOG)
 213           vmlog_cacao_throw(o);
 214 #endif
 215
 216           for (i = 0; i < exceptiontablelength; i++) {
 217                   ex--;
 218
 219                   cr = ex->catchtype;
 220
 221                   if (cr.any == NULL) {
 222                           /* catch all */
 223                           c = NULL;
 224                   }
 225                   else {
 226                           if (IS_CLASSREF(cr)) {
 227                                   /* The exception class reference is unresolved. */
 228                                   /* We have to do _eager_ resolving here. While the class of */
 229                                   /* the exception object is guaranteed to be loaded, it may  */
 230                                   /* well have been loaded by a different loader than the     */
 231                                   /* defining loader of m's class, which is the one we must   */
 232                                   /* use to resolve the catch class. Thus lazy resolving      */
 233                                   /* might fail, even if the result of the resolution would   */
 234                                   /* be an already loaded class.                              */
 235
 236                                   /* The resolving may involve Java code, so we need a usable */
 237                                   /* global_sp. XXX is this a correct value for global_sp?    */
 238
 239                                   global_sp = (Cell *)(((u1 *)fp) - framesize - SIZEOF_VOID_P);
 240
 241                                   c = resolve_classref_eager(cr.ref);
 242
 243                                   CLEAR_global_sp;
 244
 245                                   if (c == NULL) {
 246                                           /* Exception resolving the exception class, argh! */
 247                                           /* XXX how to report that error? */
 248                                           assert(0);
 249                                   }
 250
 251                                   /* Ok, we resolved it. Enter it in the table, so we don't */
 252                                   /* have to do this again.                                 */
 253                                   /* XXX this write should be atomic. Is it?                */
 254
 255                                   ex->catchtype.cls = c;
 256                           }
 257                           else {
 258                                   c = cr.cls;
 259
 260                                   /* If the class is not linked, the exception object cannot */
 261                                   /* be an instance of it.                                   */
 262                                   if (!(c->state & CLASS_LINKED))
 263                                           continue;
 264                           }
 265                   }
 266
 267                   if (ip-1 >= (Inst *) ex->startpc && ip-1 < (Inst *) ex->endpc &&
 268                           (c == NULL || builtin_instanceof(o, c)))
 269                   {
 270 #if defined(ENABLE_VMLOG)
 271                           vmlog_cacao_catch(o);
 272 #endif
 273
 274                           *new_spp = (Cell *)(((u1 *)fp) - framesize - SIZEOF_VOID_P);
 275                           *new_fpp = fp;
 276                           return (Inst *) (ex->handlerpc);
 277                   }
 278           }
 279
 280 #if defined(ENABLE_THREADS)
 281           /* is this method synchronized? */
 282
 283           if (issync) {
 284                   java_objectheader *syncobj;
 285
 286                   /* get synchronization object */
 287
 288                   if (m->flags & ACC_STATIC) {
 289                           syncobj = (java_objectheader *) m->class;
 290                   }
 291                   else {
 292                           syncobj = (java_objectheader *) access_local_cell(-framesize + SIZEOF_VOID_P);
 293                   }
 294
 295                   assert(syncobj != NULL);
 296
 297                   lock_monitor_exit(syncobj);
 298           }
 299 #endif /* defined(ENABLE_THREADS) */
 300
 301           /* unwind stack frame */
 302
 303 #if defined(ENABLE_VMLOG)
 304           vmlog_cacao_unwnd_method(m);
 305 #endif
 306
 307           ip = (Inst *)access_local_cell(-framesize - SIZEOF_VOID_P);
 308           fp = (Cell *)access_local_cell(-framesize);
 309   }
 310
 311   return NULL;
 312 }
 313
 314
 315 void intrp_asm_abstractmethoderror(void)
 316 {
 317         vm_abort("intrp_asm_abstractmethoderror: IMPLEMENT ME!");
 318 }
 319
 320
 321 void intrp_asm_getclassvalues_atomic(vftbl_t *super, vftbl_t *sub, castinfo *out)
 322 {
 323         s4 sbv, sdv, sv;
 324
 325         LOCK_MONITOR_ENTER(linker_classrenumber_lock);
 326
 327         sbv = super->baseval;
 328         sdv = super->diffval;
 329         sv  = sub->baseval;
 330
 331         LOCK_MONITOR_EXIT(linker_classrenumber_lock);
 332
 333         out->super_baseval = sbv;
 334         out->super_diffval = sdv;
 335         out->sub_baseval   = sv;
 336 }
 337
 338
 339 /*
 340  * These are local overrides for various environment variables in Emacs.
 341  * Please do not remove this and leave it at the end of the file, where
 342  * Emacs will automagically detect them.
 343  * ---------------------------------------------------------------------
 344  * Local variables:
 345  * mode: c
 346  * indent-tabs-mode: t
 347  * c-basic-offset: 4
 348  * tab-width: 4
 349  * End:
 350  * vim:noexpandtab:sw=4:ts=4:
 351  */