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 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    Contact: cacao@cacaojvm.org
  26
  27    Authors: Christian Thalinger
  28             Anton Ertl
  29
  30    Changes: Edwin Steiner
  31
  32    $Id: asmpart.c 5812 2006-10-20 14:22:23Z twisti $
  33
  34 */
  35
  36
  37 #include "config.h"
  38
  39 #include <assert.h>
  40
  41 #include "vm/types.h"
  42
  43 #include "arch.h"
  44
  45 #include "vm/builtin.h"
  46 #include "vm/class.h"
  47 #include "vm/exceptions.h"
  48 #include "vm/loader.h"
  49 #include "vm/options.h"
  50 #include "vm/jit/asmpart.h"
  51 #include "vm/jit/methodheader.h"
  52 #include "vm/jit/intrp/intrp.h"
  53 #include "vm/jit/dseg.h"
  54
  55
  56 static bool intrp_asm_vm_call_method_intern(methodinfo *m, s4 vmargscount,
  57                                                                                         vm_arg *vmargs)
  58 {
  59         java_objectheader *retval;
  60         Cell              *sp;
  61         s4                 i;
  62         u1                *entrypoint;
  63
  64         sp = global_sp;
  65         CLEAR_global_sp;
  66
  67         assert(sp != NULL);
  68
  69         for (i = 0; i < vmargscount; i++) {
  70                 switch (vmargs[i].type) {
  71                 case TYPE_INT:
  72                 case TYPE_FLT:
  73                 case TYPE_ADR:
  74                         *(--sp) = (Cell) vmargs[i].data.l;
  75                         break;
  76                 case TYPE_LNG:
  77                 case TYPE_DBL:
  78                         sp -= 2;
  79                         *((u8 *) sp) = vmargs[i].data.l;
  80                         break;
  81                 }
  82         }
  83
  84         entrypoint = createcalljavafunction(m);
  85
  86         retval = engine((Inst *) entrypoint, sp, NULL);
  87
  88         /* XXX remove the method from the method table */
  89
  90         if (retval != NULL) {
  91                 (void)builtin_throw_exception(retval);
  92                 return false;
  93         }
  94         else
  95                 return true;
  96 }
  97
  98
  99 java_objectheader *intrp_asm_vm_call_method(methodinfo *m, s4 vmargscount,
 100                                                                                         vm_arg *vmargs)
 101 {
 102         java_objectheader *retval = NULL;
 103
 104         if (intrp_asm_vm_call_method_intern(m, vmargscount, vmargs)) {
 105                 if (m->parseddesc->returntype.type == TYPE_ADR)
 106                         retval = (java_objectheader *)*global_sp++;
 107                 else
 108                         assert(m->parseddesc->returntype.type == TYPE_VOID);
 109                 return retval;
 110         } else
 111                 return NULL;
 112 }
 113
 114
 115 s4 intrp_asm_vm_call_method_int(methodinfo *m, s4 vmargscount, vm_arg *vmargs)
 116 {
 117         s4 retval = 0;
 118
 119         if (intrp_asm_vm_call_method_intern(m, vmargscount, vmargs)) {
 120                 if (m->parseddesc->returntype.type == TYPE_INT)
 121                         retval = *global_sp++;
 122                 else
 123                         assert(m->parseddesc->returntype.type == TYPE_VOID);
 124                 return retval;
 125         } else
 126                 return 0;
 127 }
 128
 129
 130 s8 intrp_asm_vm_call_method_long(methodinfo *m, s4 vmargscount, vm_arg *vmargs)
 131 {
 132         s8 retval;
 133
 134         assert(m->parseddesc->returntype.type == TYPE_LNG);
 135
 136         if (intrp_asm_vm_call_method_intern(m, vmargscount, vmargs)) {
 137                 retval = *(s8 *)global_sp;
 138                 global_sp += 2;
 139                 return retval;
 140         } else
 141                 return 0;
 142 }
 143
 144
 145 float intrp_asm_vm_call_method_float(methodinfo *m, s4 vmargscount,
 146                                                                          vm_arg *vmargs)
 147 {
 148         float retval;
 149
 150         assert(m->parseddesc->returntype.type == TYPE_FLT);
 151
 152         if (intrp_asm_vm_call_method_intern(m, vmargscount, vmargs)) {
 153                 retval = *(float *)global_sp;
 154                 global_sp += 1;
 155                 return retval;
 156         } else
 157                 return 0.0;
 158 }
 159
 160
 161 double intrp_asm_vm_call_method_double(methodinfo *m, s4 vmargscount,
 162                                                                            vm_arg *vmargs)
 163 {
 164         double retval;
 165
 166         assert(m->parseddesc->returntype.type == TYPE_DBL);
 167
 168         if (intrp_asm_vm_call_method_intern(m, vmargscount, vmargs)) {
 169                 retval = *(double *)global_sp;
 170                 global_sp += 2;
 171                 return retval;
 172         } else
 173                 return 0.0;
 174 }
 175
 176
 177 Inst *intrp_asm_handle_exception(Inst *ip, java_objectheader *o, Cell *fp, Cell **new_spp, Cell **new_fpp)
 178 {
 179         classinfo            *c;
 180         classref_or_classinfo cr;
 181         s4                    framesize;
 182         s4                    issync;
 183         dseg_exception_entry *ex;
 184         s4                    exceptiontablelength;
 185         s4                    i;
 186
 187   /* for a description of the stack see IRETURN in java.vmg */
 188
 189   for (; fp != NULL; ) {
 190           u1 *f = codegen_get_pv_from_pc((u1 *) (ip - 1));
 191
 192           /* get methodinfo pointer from method header */
 193
 194           codeinfo *code = *((codeinfo **) ((u1 *)f + CodeinfoPointer));
 195           methodinfo *m = code->m;
 196
 197           framesize            = *((s4 *)             (((u1 *) f) + FrameSize));
 198           issync               = *((s4 *)             (((u1 *) f) + IsSync));
 199           ex                   =   (dseg_exception_entry *)
 200                                                                                                   (((u1 *) f) + ExTableStart);
 201           exceptiontablelength = *((s4 *)             (((u1 *) f) + ExTableSize));
 202
 203 #if !defined(NDEBUG)
 204           if (opt_verbose || opt_verbosecall || opt_verboseexception)
 205                   builtin_trace_exception(o, m, ip, 1);
 206 #endif
 207
 208           for (i = 0; i < exceptiontablelength; i++) {
 209                   ex--;
 210
 211                   cr = ex->catchtype;
 212
 213                   if (cr.any == NULL) {
 214                           /* catch all */
 215                           c = NULL;
 216                   }
 217                   else {
 218                           if (IS_CLASSREF(cr)) {
 219                                   /* The exception class reference is unresolved. */
 220                                   /* We have to do _eager_ resolving here. While the class of */
 221                                   /* the exception object is guaranteed to be loaded, it may  */
 222                                   /* well have been loaded by a different loader than the     */
 223                                   /* defining loader of m's class, which is the one we must   */
 224                                   /* use to resolve the catch class. Thus lazy resolving      */
 225                                   /* might fail, even if the result of the resolution would   */
 226                                   /* be an already loaded class.                              */
 227
 228                                   /* The resolving may involve Java code, so we need a usable */
 229                                   /* global_sp. XXX is this a correct value for global_sp?    */
 230
 231                                   global_sp = (Cell *)(((u1 *)fp) - framesize - SIZEOF_VOID_P);
 232
 233                                   c = resolve_classref_eager(cr.ref);
 234
 235                                   CLEAR_global_sp;
 236
 237                                   if (c == NULL) {
 238                                           /* Exception resolving the exception class, argh! */
 239                                           /* XXX how to report that error? */
 240                                           assert(0);
 241                                   }
 242
 243                                   /* Ok, we resolved it. Enter it in the table, so we don't */
 244                                   /* have to do this again.                                 */
 245                                   /* XXX this write should be atomic. Is it?                */
 246
 247                                   ex->catchtype.cls = c;
 248                           }
 249                           else {
 250                                   c = cr.cls;
 251
 252                                   /* If the class is not linked, the exception object cannot */
 253                                   /* be an instance of it.                                   */
 254                                   if (!(c->state & CLASS_LINKED))
 255                                           continue;
 256                           }
 257                   }
 258
 259                   if (ip-1 >= (Inst *) ex->startpc && ip-1 < (Inst *) ex->endpc &&
 260                           (c == NULL || builtin_instanceof(o, c)))
 261                   {
 262                           *new_spp = (Cell *)(((u1 *)fp) - framesize - SIZEOF_VOID_P);
 263                           *new_fpp = fp;
 264                           return (Inst *) (ex->handlerpc);
 265                   }
 266           }
 267
 268 #if defined(ENABLE_THREADS)
 269           /* is this method synchronized? */
 270
 271           if (issync) {
 272                   java_objectheader *syncobj;
 273
 274                   /* get synchronization object */
 275
 276                   if (m->flags & ACC_STATIC) {
 277                           syncobj = (java_objectheader *) m->class;
 278                   }
 279                   else {
 280                           syncobj = (java_objectheader *) access_local_cell(-framesize + SIZEOF_VOID_P);
 281                   }
 282
 283                   assert(syncobj != NULL);
 284
 285                   lock_monitor_exit(syncobj);
 286           }
 287 #endif /* defined(ENABLE_THREADS) */
 288
 289           /* unwind stack frame */
 290
 291           ip = (Inst *)access_local_cell(-framesize - SIZEOF_VOID_P);
 292           fp = (Cell *)access_local_cell(-framesize);
 293   }
 294
 295   return NULL;
 296 }
 297
 298
 299 void intrp_asm_abstractmethoderror(void)
 300 {
 301         vm_abort("intrp_asm_abstractmethoderror: IMPLEMENT ME!");
 302 }
 303
 304
 305 void intrp_asm_getclassvalues_atomic(vftbl_t *super, vftbl_t *sub, castinfo *out)
 306 {
 307         s4 sbv, sdv, sv;
 308
 309 #if defined(ENABLE_THREADS)
 310         compiler_lock();
 311 #endif
 312
 313         sbv = super->baseval;
 314         sdv = super->diffval;
 315         sv  = sub->baseval;
 316
 317 #if defined(ENABLE_THREADS)
 318         compiler_unlock();
 319 #endif
 320
 321         out->super_baseval = sbv;
 322         out->super_diffval = sdv;
 323         out->sub_baseval   = sv;
 324 }
 325
 326
 327 /*
 328  * These are local overrides for various environment variables in Emacs.
 329  * Please do not remove this and leave it at the end of the file, where
 330  * Emacs will automagically detect them.
 331  * ---------------------------------------------------------------------
 332  * Local variables:
 333  * mode: c
 334  * indent-tabs-mode: t
 335  * c-basic-offset: 4
 336  * tab-width: 4
 337  * End:
 338  * vim:noexpandtab:sw=4:ts=4:
 339  */