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:
  31
  32    $Id: asmpart.c 5695 2006-10-05 16:18:10Z edwin $
  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
  54
  55 static bool intrp_asm_vm_call_method_intern(methodinfo *m, s4 vmargscount,
  56                                                                                         vm_arg *vmargs)
  57 {
  58         java_objectheader *retval;
  59         Cell              *sp;
  60         s4                 i;
  61         u1                *entrypoint;
  62
  63         sp = global_sp;
  64         CLEAR_global_sp;
  65
  66         assert(sp != NULL);
  67
  68         for (i = 0; i < vmargscount; i++) {
  69                 switch (vmargs[i].type) {
  70                 case TYPE_INT:
  71                 case TYPE_FLT:
  72                 case TYPE_ADR:
  73                         *(--sp) = (Cell) vmargs[i].data.l;
  74                         break;
  75                 case TYPE_LNG:
  76                 case TYPE_DBL:
  77                         sp -= 2;
  78                         *((u8 *) sp) = vmargs[i].data.l;
  79                         break;
  80                 }
  81         }
  82
  83         entrypoint = createcalljavafunction(m);
  84
  85         retval = engine((Inst *) entrypoint, sp, NULL);
  86
  87         /* XXX remove the method from the method table */
  88
  89         if (retval != NULL) {
  90                 (void)builtin_throw_exception(retval);
  91                 return false;
  92         }
  93         else
  94                 return true;
  95 }
  96
  97
  98 java_objectheader *intrp_asm_vm_call_method(methodinfo *m, s4 vmargscount,
  99                                                                                         vm_arg *vmargs)
 100 {
 101         java_objectheader *retval = NULL;
 102
 103         if (intrp_asm_vm_call_method_intern(m, vmargscount, vmargs)) {
 104                 if (m->parseddesc->returntype.type == TYPE_ADR)
 105                         retval = (java_objectheader *)*global_sp++;
 106                 else
 107                         assert(m->parseddesc->returntype.type == TYPE_VOID);
 108                 return retval;
 109         } else
 110                 return NULL;
 111 }
 112
 113
 114 s4 intrp_asm_vm_call_method_int(methodinfo *m, s4 vmargscount, vm_arg *vmargs)
 115 {
 116         s4 retval = 0;
 117
 118         if (intrp_asm_vm_call_method_intern(m, vmargscount, vmargs)) {
 119                 if (m->parseddesc->returntype.type == TYPE_INT)
 120                         retval = *global_sp++;
 121                 else
 122                         assert(m->parseddesc->returntype.type == TYPE_VOID);
 123                 return retval;
 124         } else
 125                 return 0;
 126 }
 127
 128
 129 s8 intrp_asm_vm_call_method_long(methodinfo *m, s4 vmargscount, vm_arg *vmargs)
 130 {
 131         s8 retval;
 132
 133         assert(m->parseddesc->returntype.type == TYPE_LNG);
 134
 135         if (intrp_asm_vm_call_method_intern(m, vmargscount, vmargs)) {
 136                 retval = *(s8 *)global_sp;
 137                 global_sp += 2;
 138                 return retval;
 139         } else
 140                 return 0;
 141 }
 142
 143
 144 float intrp_asm_vm_call_method_float(methodinfo *m, s4 vmargscount,
 145                                                                          vm_arg *vmargs)
 146 {
 147         float retval;
 148
 149         assert(m->parseddesc->returntype.type == TYPE_FLT);
 150
 151         if (intrp_asm_vm_call_method_intern(m, vmargscount, vmargs)) {
 152                 retval = *(float *)global_sp;
 153                 global_sp += 1;
 154                 return retval;
 155         } else
 156                 return 0.0;
 157 }
 158
 159
 160 double intrp_asm_vm_call_method_double(methodinfo *m, s4 vmargscount,
 161                                                                            vm_arg *vmargs)
 162 {
 163         double retval;
 164
 165         assert(m->parseddesc->returntype.type == TYPE_DBL);
 166
 167         if (intrp_asm_vm_call_method_intern(m, vmargscount, vmargs)) {
 168                 retval = *(double *)global_sp;
 169                 global_sp += 2;
 170                 return retval;
 171         } else
 172                 return 0.0;
 173 }
 174
 175
 176 Inst *intrp_asm_handle_exception(Inst *ip, java_objectheader *o, Cell *fp, Cell **new_spp, Cell **new_fpp)
 177 {
 178         classinfo            *c;
 179         classref_or_classinfo cr;
 180         s4                    framesize;
 181         s4                    issync;
 182         exceptionentry       *ex;
 183         s4                    exceptiontablelength;
 184         s4                    i;
 185
 186   /* for a description of the stack see IRETURN in java.vmg */
 187
 188   for (; fp != NULL; ) {
 189           u1 *f = codegen_get_pv_from_pc((u1 *) (ip - 1));
 190
 191           /* get methodinfo pointer from method header */
 192
 193           codeinfo *code = *((codeinfo **) ((u1 *)f + CodeinfoPointer));
 194           methodinfo *m = code->m;
 195
 196           framesize            = *((s4 *)             (((u1 *) f) + FrameSize));
 197           issync               = *((s4 *)             (((u1 *) f) + IsSync));
 198           ex                   =   (exceptionentry *) (((u1 *) f) + ExTableStart);
 199           exceptiontablelength = *((s4 *)             (((u1 *) f) + ExTableSize));
 200
 201 #if !defined(NDEBUG)
 202           if (opt_verbose || opt_verbosecall || opt_verboseexception)
 203                   builtin_trace_exception(o, m, ip, 1);
 204 #endif
 205
 206           for (i = 0; i < exceptiontablelength; i++) {
 207                   ex--;
 208
 209                   cr = ex->catchtype;
 210
 211                   if (cr.any == NULL) {
 212                           /* catch all */
 213                           c = NULL;
 214                   }
 215                   else {
 216                           if (IS_CLASSREF(cr)) {
 217                                   /* The exception class reference is unresolved. */
 218                                   /* We have to do _eager_ resolving here. While the class of */
 219                                   /* the exception object is guaranteed to be loaded, it may  */
 220                                   /* well have been loaded by a different loader than the     */
 221                                   /* defining loader of m's class, which is the one we must   */
 222                                   /* use to resolve the catch class. Thus lazy resolving      */
 223                                   /* might fail, even if the result of the resolution would   */
 224                                   /* be an already loaded class.                              */
 225
 226                                   /* The resolving may involve Java code, so we need a usable */
 227                                   /* global_sp. XXX is this a correct value for global_sp?    */
 228
 229                                   global_sp = (Cell *)(((u1 *)fp) - framesize - SIZEOF_VOID_P);
 230
 231                                   c = resolve_classref_eager(cr.ref);
 232
 233                                   CLEAR_global_sp;
 234
 235                                   if (c == NULL) {
 236                                           /* Exception resolving the exception class, argh! */
 237                                           /* XXX how to report that error? */
 238                                           assert(0);
 239                                   }
 240
 241                                   /* Ok, we resolved it. Enter it in the table, so we don't */
 242                                   /* have to do this again.                                 */
 243                                   /* XXX this write should be atomic. Is it?                */
 244
 245                                   ex->catchtype.cls = c;
 246                           }
 247                           else {
 248                                   c = cr.cls;
 249
 250                                   /* If the class is not linked, the exception object cannot */
 251                                   /* be an instance of it.                                   */
 252                                   if (!(c->state & CLASS_LINKED))
 253                                           continue;
 254                           }
 255                   }
 256
 257                   if (ip-1 >= (Inst *) ex->startpc && ip-1 < (Inst *) ex->endpc &&
 258                           (c == NULL || builtin_instanceof(o, c)))
 259                   {
 260                           *new_spp = (Cell *)(((u1 *)fp) - framesize - SIZEOF_VOID_P);
 261                           *new_fpp = fp;
 262                           return (Inst *) (ex->handlerpc);
 263                   }
 264           }
 265
 266 #if defined(ENABLE_THREADS)
 267           /* is this method synchronized? */
 268
 269           if (issync) {
 270                   java_objectheader *syncobj;
 271
 272                   /* get synchronization object */
 273
 274                   if (m->flags & ACC_STATIC) {
 275                           syncobj = (java_objectheader *) m->class;
 276                   }
 277                   else {
 278                           syncobj = (java_objectheader *) access_local_cell(-framesize + SIZEOF_VOID_P);
 279                   }
 280
 281                   assert(syncobj != NULL);
 282
 283                   lock_monitor_exit(syncobj);
 284           }
 285 #endif /* defined(ENABLE_THREADS) */
 286
 287           /* unwind stack frame */
 288
 289           ip = (Inst *)access_local_cell(-framesize - SIZEOF_VOID_P);
 290           fp = (Cell *)access_local_cell(-framesize);
 291   }
 292
 293   return NULL;
 294 }
 295
 296
 297 void intrp_asm_getclassvalues_atomic(vftbl_t *super, vftbl_t *sub, castinfo *out)
 298 {
 299         s4 sbv, sdv, sv;
 300
 301 #if defined(ENABLE_THREADS)
 302         compiler_lock();
 303 #endif
 304
 305         sbv = super->baseval;
 306         sdv = super->diffval;
 307         sv  = sub->baseval;
 308
 309 #if defined(ENABLE_THREADS)
 310         compiler_unlock();
 311 #endif
 312
 313         out->super_baseval = sbv;
 314         out->super_diffval = sdv;
 315         out->sub_baseval   = sv;
 316 }
 317
 318
 319 /*
 320  * These are local overrides for various environment variables in Emacs.
 321  * Please do not remove this and leave it at the end of the file, where
 322  * Emacs will automagically detect them.
 323  * ---------------------------------------------------------------------
 324  * Local variables:
 325  * mode: c
 326  * indent-tabs-mode: t
 327  * c-basic-offset: 4
 328  * tab-width: 4
 329  * End:
 330  */