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    $Id: asmpart.c 7357 2007-02-14 11:35:59Z twisti $
  26
  27 */
  28
  29
  30 #include "config.h"
  31
  32 #include <assert.h>
  33
  34 #include "vm/types.h"
  35
  36 #include "arch.h"
  37
  38 #if defined(ENABLE_THREADS)
  39 # include "threads/native/threads.h"
  40 #else
  41 # include "threads/none/threads.h"
  42 #endif
  43
  44 #include "vm/builtin.h"
  45 #include "vm/exceptions.h"
  46
  47 #include "vm/jit/asmpart.h"
  48 #include "vm/jit/methodheader.h"
  49 #include "vm/jit/intrp/intrp.h"
  50 #include "vm/jit/dseg.h"
  51
  52 #include "vmcore/class.h"
  53 #include "vmcore/loader.h"
  54 #include "vmcore/options.h"
  55
  56
  57 static bool intrp_asm_vm_call_method_intern(methodinfo *m, s4 vmargscount,
  58                                                                                         vm_arg *vmargs)
  59 {
  60         java_objectheader *retval;
  61         Cell              *sp;
  62         s4                 i;
  63         u1                *entrypoint;
  64
  65         sp = global_sp;
  66         CLEAR_global_sp;
  67
  68         assert(sp != NULL);
  69
  70         for (i = 0; i < vmargscount; i++) {
  71                 switch (vmargs[i].type) {
  72                 case TYPE_INT:
  73                 case TYPE_FLT:
  74                 case TYPE_ADR:
  75                         *(--sp) = (Cell) vmargs[i].data.l;
  76                         break;
  77                 case TYPE_LNG:
  78                 case TYPE_DBL:
  79                         sp -= 2;
  80                         *((u8 *) sp) = vmargs[i].data.l;
  81                         break;
  82                 }
  83         }
  84
  85         entrypoint = createcalljavafunction(m);
  86
  87         retval = engine((Inst *) entrypoint, sp, NULL);
  88
  89         /* XXX remove the method from the method table */
  90
  91         if (retval != NULL) {
  92                 (void)builtin_throw_exception(retval);
  93                 return false;
  94         }
  95         else
  96                 return true;
  97 }
  98
  99
 100 java_objectheader *intrp_asm_vm_call_method(methodinfo *m, s4 vmargscount,
 101                                                                                         vm_arg *vmargs)
 102 {
 103         java_objectheader *retval = NULL;
 104
 105         if (intrp_asm_vm_call_method_intern(m, vmargscount, vmargs)) {
 106                 if (m->parseddesc->returntype.type == TYPE_ADR)
 107                         retval = (java_objectheader *)*global_sp++;
 108                 else
 109                         assert(m->parseddesc->returntype.type == TYPE_VOID);
 110                 return retval;
 111         } else
 112                 return NULL;
 113 }
 114
 115
 116 s4 intrp_asm_vm_call_method_int(methodinfo *m, s4 vmargscount, vm_arg *vmargs)
 117 {
 118         s4 retval = 0;
 119
 120         if (intrp_asm_vm_call_method_intern(m, vmargscount, vmargs)) {
 121                 if (m->parseddesc->returntype.type == TYPE_INT)
 122                         retval = *global_sp++;
 123                 else
 124                         assert(m->parseddesc->returntype.type == TYPE_VOID);
 125                 return retval;
 126         } else
 127                 return 0;
 128 }
 129
 130
 131 s8 intrp_asm_vm_call_method_long(methodinfo *m, s4 vmargscount, vm_arg *vmargs)
 132 {
 133         s8 retval;
 134
 135         assert(m->parseddesc->returntype.type == TYPE_LNG);
 136
 137         if (intrp_asm_vm_call_method_intern(m, vmargscount, vmargs)) {
 138                 retval = *(s8 *)global_sp;
 139                 global_sp += 2;
 140                 return retval;
 141         } else
 142                 return 0;
 143 }
 144
 145
 146 float intrp_asm_vm_call_method_float(methodinfo *m, s4 vmargscount,
 147                                                                          vm_arg *vmargs)
 148 {
 149         float retval;
 150
 151         assert(m->parseddesc->returntype.type == TYPE_FLT);
 152
 153         if (intrp_asm_vm_call_method_intern(m, vmargscount, vmargs)) {
 154                 retval = *(float *)global_sp;
 155                 global_sp += 1;
 156                 return retval;
 157         } else
 158                 return 0.0;
 159 }
 160
 161
 162 double intrp_asm_vm_call_method_double(methodinfo *m, s4 vmargscount,
 163                                                                            vm_arg *vmargs)
 164 {
 165         double retval;
 166
 167         assert(m->parseddesc->returntype.type == TYPE_DBL);
 168
 169         if (intrp_asm_vm_call_method_intern(m, vmargscount, vmargs)) {
 170                 retval = *(double *)global_sp;
 171                 global_sp += 2;
 172                 return retval;
 173         } else
 174                 return 0.0;
 175 }
 176
 177
 178 Inst *intrp_asm_handle_exception(Inst *ip, java_objectheader *o, Cell *fp, Cell **new_spp, Cell **new_fpp)
 179 {
 180         classinfo            *c;
 181         classref_or_classinfo cr;
 182         s4                    framesize;
 183         s4                    issync;
 184         dseg_exception_entry *ex;
 185         s4                    exceptiontablelength;
 186         s4                    i;
 187
 188   /* for a description of the stack see IRETURN in java.vmg */
 189
 190   for (; fp != NULL; ) {
 191           u1 *f = codegen_get_pv_from_pc((u1 *) (ip - 1));
 192
 193           /* get methodinfo pointer from method header */
 194
 195           codeinfo *code = *((codeinfo **) ((u1 *)f + CodeinfoPointer));
 196           methodinfo *m = code->m;
 197
 198           framesize            = *((s4 *)             (((u1 *) f) + FrameSize));
 199           issync               = *((s4 *)             (((u1 *) f) + IsSync));
 200           ex                   =   (dseg_exception_entry *)
 201                                                                                                   (((u1 *) f) + ExTableStart);
 202           exceptiontablelength = *((s4 *)             (((u1 *) f) + ExTableSize));
 203
 204 #if !defined(NDEBUG)
 205           if (opt_verbose || opt_verbosecall || opt_verboseexception)
 206                   builtin_trace_exception(o, m, ip, 1);
 207 #endif
 208
 209           for (i = 0; i < exceptiontablelength; i++) {
 210                   ex--;
 211
 212                   cr = ex->catchtype;
 213
 214                   if (cr.any == NULL) {
 215                           /* catch all */
 216                           c = NULL;
 217                   }
 218                   else {
 219                           if (IS_CLASSREF(cr)) {
 220                                   /* The exception class reference is unresolved. */
 221                                   /* We have to do _eager_ resolving here. While the class of */
 222                                   /* the exception object is guaranteed to be loaded, it may  */
 223                                   /* well have been loaded by a different loader than the     */
 224                                   /* defining loader of m's class, which is the one we must   */
 225                                   /* use to resolve the catch class. Thus lazy resolving      */
 226                                   /* might fail, even if the result of the resolution would   */
 227                                   /* be an already loaded class.                              */
 228
 229                                   /* The resolving may involve Java code, so we need a usable */
 230                                   /* global_sp. XXX is this a correct value for global_sp?    */
 231
 232                                   global_sp = (Cell *)(((u1 *)fp) - framesize - SIZEOF_VOID_P);
 233
 234                                   c = resolve_classref_eager(cr.ref);
 235
 236                                   CLEAR_global_sp;
 237
 238                                   if (c == NULL) {
 239                                           /* Exception resolving the exception class, argh! */
 240                                           /* XXX how to report that error? */
 241                                           assert(0);
 242                                   }
 243
 244                                   /* Ok, we resolved it. Enter it in the table, so we don't */
 245                                   /* have to do this again.                                 */
 246                                   /* XXX this write should be atomic. Is it?                */
 247
 248                                   ex->catchtype.cls = c;
 249                           }
 250                           else {
 251                                   c = cr.cls;
 252
 253                                   /* If the class is not linked, the exception object cannot */
 254                                   /* be an instance of it.                                   */
 255                                   if (!(c->state & CLASS_LINKED))
 256                                           continue;
 257                           }
 258                   }
 259
 260                   if (ip-1 >= (Inst *) ex->startpc && ip-1 < (Inst *) ex->endpc &&
 261                           (c == NULL || builtin_instanceof(o, c)))
 262                   {
 263                           *new_spp = (Cell *)(((u1 *)fp) - framesize - SIZEOF_VOID_P);
 264                           *new_fpp = fp;
 265                           return (Inst *) (ex->handlerpc);
 266                   }
 267           }
 268
 269 #if defined(ENABLE_THREADS)
 270           /* is this method synchronized? */
 271
 272           if (issync) {
 273                   java_objectheader *syncobj;
 274
 275                   /* get synchronization object */
 276
 277                   if (m->flags & ACC_STATIC) {
 278                           syncobj = (java_objectheader *) m->class;
 279                   }
 280                   else {
 281                           syncobj = (java_objectheader *) access_local_cell(-framesize + SIZEOF_VOID_P);
 282                   }
 283
 284                   assert(syncobj != NULL);
 285
 286                   lock_monitor_exit(syncobj);
 287           }
 288 #endif /* defined(ENABLE_THREADS) */
 289
 290           /* unwind stack frame */
 291
 292           ip = (Inst *)access_local_cell(-framesize - SIZEOF_VOID_P);
 293           fp = (Cell *)access_local_cell(-framesize);
 294   }
 295
 296   return NULL;
 297 }
 298
 299
 300 void intrp_asm_abstractmethoderror(void)
 301 {
 302         vm_abort("intrp_asm_abstractmethoderror: IMPLEMENT ME!");
 303 }
 304
 305
 306 void intrp_asm_getclassvalues_atomic(vftbl_t *super, vftbl_t *sub, castinfo *out)
 307 {
 308         s4 sbv, sdv, sv;
 309
 310 #if defined(ENABLE_THREADS)
 311         compiler_lock();
 312 #endif
 313
 314         sbv = super->baseval;
 315         sdv = super->diffval;
 316         sv  = sub->baseval;
 317
 318 #if defined(ENABLE_THREADS)
 319         compiler_unlock();
 320 #endif
 321
 322         out->super_baseval = sbv;
 323         out->super_diffval = sdv;
 324         out->sub_baseval   = sv;
 325 }
 326
 327
 328 /*
 329  * These are local overrides for various environment variables in Emacs.
 330  * Please do not remove this and leave it at the end of the file, where
 331  * Emacs will automagically detect them.
 332  * ---------------------------------------------------------------------
 333  * Local variables:
 334  * mode: c
 335  * indent-tabs-mode: t
 336  * c-basic-offset: 4
 337  * tab-width: 4
 338  * End:
 339  * vim:noexpandtab:sw=4:ts=4:
 340  */