2 * emit-x86.c: Support functions for emitting x86 code
5 * Dietmar Maurer (dietmar@ximian.com)
6 * Miguel de Icaza (miguel@ximian.com)
8 * (C) 2001 Ximian, Inc.
14 #include <mono/metadata/assembly.h>
15 #include <mono/metadata/loader.h>
16 #include <mono/metadata/cil-coff.h>
17 #include <mono/metadata/tabledefs.h>
18 #include <mono/metadata/class.h>
19 #include <mono/metadata/debug-helpers.h>
20 #include <mono/metadata/mono-endian.h>
21 #include <mono/arch/x86/x86-codegen.h>
22 #include <mono/metadata/profiler-private.h>
29 //#define DEBUG_REGALLOC
30 //#define DEBUG_SPILLS
33 * we may want a x86-specific header or we
34 * can just declare it extern in x86.brg.
36 int mono_x86_have_cmov = 0;
39 cpuid (int id, int* p_eax, int* p_ebx, int* p_ecx, int* p_edx)
42 __asm__ __volatile__ (
46 "xorl $0x200000, %%eax\n"
52 "andl $0x200000, %%eax\n"
60 __asm__ __volatile__ ("cpuid"
61 : "=a" (*p_eax), "=b" (*p_ebx), "=c" (*p_ecx), "=d" (*p_edx)
69 mono_cpu_detect (void) {
70 int eax, ebx, ecx, edx;
72 /* Feature Flags function, flags returned in EDX. */
73 if (cpuid(1, &eax, &ebx, &ecx, &edx)) {
74 if (edx & (1U << 15)) {
75 mono_x86_have_cmov = 1;
81 enter_method (MonoMethod *method, char *ebp)
88 tmpsig = mono_signature_get_desc(method->signature, TRUE);
89 printf ("ENTER: %s.%s::%s (%s)\n(", method->klass->name_space,
90 method->klass->name, method->name, tmpsig);
93 if (((int)ebp & 3) != 0) {
94 g_error ("unaligned stack detected (%p)", ebp);
99 if (ISSTRUCT (method->signature->ret)) {
102 g_assert (!method->signature->ret->byref);
104 size = mono_type_stack_size (method->signature->ret, &align);
106 printf ("VALUERET:%p, ", *((gpointer *)ebp));
107 ebp += sizeof (gpointer);
110 if (method->signature->hasthis) {
111 if (method->klass->valuetype) {
112 printf ("value:%p, ", *((gpointer *)ebp));
114 o = *((MonoObject **)ebp);
118 class = o->vtable->klass;
120 if (class == mono_defaults.string_class) {
121 printf ("this:[STRING:%p:%s], ", o, mono_string_to_utf8 ((MonoString *)o));
123 printf ("this:%p[%s.%s], ", o, class->name_space, class->name);
126 ebp += sizeof (gpointer);
129 for (i = 0; i < method->signature->param_count; ++i) {
130 MonoType *type = method->signature->params [i];
132 size = mono_type_stack_size (type, &align);
135 printf ("[BYREF:%p], ", *((gpointer *)ebp));
136 } else switch (type->type) {
138 case MONO_TYPE_BOOLEAN:
148 printf ("%d, ", *((int *)(ebp)));
150 case MONO_TYPE_STRING: {
151 MonoString *s = *((MonoString **)ebp);
153 g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
154 printf ("[STRING:%p:%s], ", s, mono_string_to_utf8 (s));
156 printf ("[STRING:null], ");
159 case MONO_TYPE_CLASS:
160 case MONO_TYPE_OBJECT: {
161 o = *((MonoObject **)ebp);
163 class = o->vtable->klass;
165 if (class == mono_defaults.string_class) {
166 printf ("[STRING:%p:%s], ", o, mono_string_to_utf8 ((MonoString *)o));
167 } else if (class == mono_defaults.int32_class) {
168 printf ("[INT32:%p:%d], ", o, *(gint32 *)((char *)o + sizeof (MonoObject)));
170 printf ("[%s.%s:%p], ", class->name_space, class->name, o);
172 printf ("%p, ", *((gpointer *)(ebp)));
177 case MONO_TYPE_FNPTR:
178 case MONO_TYPE_ARRAY:
179 case MONO_TYPE_SZARRAY:
180 printf ("%p, ", *((gpointer *)(ebp)));
183 printf ("%lld, ", *((gint64 *)(ebp)));
186 printf ("%f, ", *((float *)(ebp)));
189 printf ("%f, ", *((double *)(ebp)));
191 case MONO_TYPE_VALUETYPE:
193 for (j = 0; j < size; j++)
194 printf ("%02x,", *((guint8*)ebp +j));
201 g_assert (align == 4 || align == 8);
202 ebp += size + align - 1;
203 ebp = (gpointer)((unsigned)ebp & ~(align - 1));
210 leave_method (MonoMethod *method, int edx, int eax, double test)
214 printf ("LEAVE: %s.%s::%s ", method->klass->name_space,
215 method->klass->name, method->name);
217 switch (method->signature->ret->type) {
220 case MONO_TYPE_BOOLEAN:
222 printf ("TRUE:%d", eax);
236 printf ("EAX=%d", eax);
238 case MONO_TYPE_STRING: {
239 MonoString *s = (MonoString *)eax;
242 g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
243 printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
245 printf ("[STRING:null], ");
248 case MONO_TYPE_OBJECT: {
249 MonoObject *o = (MonoObject *)eax;
252 if (o->vtable->klass == mono_defaults.boolean_class) {
253 printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
254 } else if (o->vtable->klass == mono_defaults.int32_class) {
255 printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
257 printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
259 printf ("[OBJECT:%p]", o);
263 case MONO_TYPE_CLASS:
265 case MONO_TYPE_FNPTR:
266 case MONO_TYPE_ARRAY:
267 case MONO_TYPE_SZARRAY:
268 printf ("EAX=%p", (gpointer)eax);
271 *((gint32 *)&l) = eax;
272 *((gint32 *)&l + 1) = edx;
273 printf ("EAX/EDX=%lld", l);
276 printf ("FP=%f\n", test);
279 printf ("(unknown return type)");
286 * arch_emit_prologue:
287 * @cfg: pointer to status information
289 * Emits the function prolog.
292 arch_emit_prologue (MonoFlowGraph *cfg)
294 MonoMethod *method = cfg->method;
295 MonoMethodHeader *header = ((MonoMethodNormal *)method)->header;
296 int i, j, k, alloc_size;
298 x86_push_reg (cfg->code, X86_EBP);
299 x86_mov_reg_reg (cfg->code, X86_EBP, X86_ESP, 4);
301 alloc_size = cfg->locals_size;
303 if (mono_regset_reg_used (cfg->rs, X86_EBX)) {
304 x86_push_reg (cfg->code, X86_EBX);
308 if (mono_regset_reg_used (cfg->rs, X86_EDI)) {
309 x86_push_reg (cfg->code, X86_EDI);
313 if (mono_regset_reg_used (cfg->rs, X86_ESI)) {
314 x86_push_reg (cfg->code, X86_ESI);
319 x86_alu_reg_imm (cfg->code, X86_SUB, X86_ESP, alloc_size);
321 if (mono_jit_trace_calls) {
322 x86_push_reg (cfg->code, X86_EBP);
323 x86_push_imm (cfg->code, cfg->method);
324 x86_mov_reg_imm (cfg->code, X86_EAX, enter_method);
325 x86_call_reg (cfg->code, X86_EAX);
326 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 8);
328 if (mono_jit_profile) {
329 x86_push_imm (cfg->code, cfg->method);
330 x86_mov_reg_imm (cfg->code, X86_EAX, mono_profiler_method_enter);
331 x86_call_reg (cfg->code, X86_EAX);
332 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 4);
335 /* initialize local vars */
336 if (header->num_locals) {
337 gboolean unassigned_locals = TRUE;
339 if (cfg->bblocks [0].live_in_set) {
340 i = mono_bitset_find_first (cfg->bblocks [0].live_in_set,
341 cfg->locals_start_index - 1);
342 unassigned_locals = (i >= 0 && i < cfg->locals_start_index +
346 if (unassigned_locals && header->init_locals) {
347 MonoVarInfo *vi = &VARINFO (cfg, cfg->locals_start_index + header->num_locals - 1);
348 int offset = vi->offset;
352 /* do not clear caller saved registers */
355 for (i = 0; i < header->num_locals; ++i) {
356 MonoVarInfo *rv = &VARINFO (cfg, cfg->locals_start_index + i);
359 int ind = 1 << rv->reg;
361 x86_alu_reg_reg (cfg->code, X86_XOR, rv->reg, rv->reg);
366 if (size == 1 || size == 2 || size == 4) {
367 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, size);
375 for (k = 0; k < i; k++) {
376 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 4);
381 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 2);
385 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 1);
390 if (!mono_regset_reg_used (cfg->rs, X86_EDI))
391 x86_push_reg (cfg->code, X86_EDI);
392 x86_lea_membase (cfg->code, X86_EDI, X86_EBP, offset);
393 x86_alu_reg_reg (cfg->code, X86_XOR, X86_EAX, X86_EAX);
394 x86_mov_reg_imm (cfg->code, X86_ECX, i);
396 x86_prefix (cfg->code, X86_REP_PREFIX);
397 x86_stosl (cfg->code);
398 for (i = 0; i < j; i++)
399 x86_stosb (cfg->code);
400 if (!mono_regset_reg_used (cfg->rs, X86_EDI))
401 x86_pop_reg (cfg->code, X86_EDI);
405 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 2);
406 x86_mov_membase_imm (cfg->code, X86_EBP, offset + 2, 0, 1);
411 /* we always need to initialize object pointers */
413 for (i = 0; i < header->num_locals; ++i) {
414 MonoType *t = header->locals [i];
415 int offset = VARINFO (cfg, cfg->locals_start_index + i).offset;
418 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 4);
423 case MONO_TYPE_STRING:
424 case MONO_TYPE_CLASS:
425 case MONO_TYPE_ARRAY:
426 case MONO_TYPE_SZARRAY:
427 case MONO_TYPE_OBJECT:
428 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 4);
438 * arch_emit_epilogue:
439 * @cfg: pointer to status information
441 * Emits the function epilog.
444 arch_emit_epilogue (MonoFlowGraph *cfg)
448 * note: with trace and profiling the value on the FP stack may get clobbered.
450 if (mono_jit_trace_calls) {
451 x86_fld_reg (cfg->code, 0);
452 x86_alu_reg_imm (cfg->code, X86_SUB, X86_ESP, 8);
453 x86_fst_membase (cfg->code, X86_ESP, 0, TRUE, TRUE);
454 x86_push_reg (cfg->code, X86_EAX);
455 x86_push_reg (cfg->code, X86_EDX);
456 x86_push_imm (cfg->code, cfg->method);
457 x86_mov_reg_imm (cfg->code, X86_EAX, leave_method);
458 x86_call_reg (cfg->code, X86_EAX);
459 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 4);
460 x86_pop_reg (cfg->code, X86_EDX);
461 x86_pop_reg (cfg->code, X86_EAX);
462 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 8);
464 if (mono_jit_profile) {
465 x86_push_reg (cfg->code, X86_EAX);
466 x86_push_reg (cfg->code, X86_EDX);
467 x86_push_imm (cfg->code, cfg->method);
468 x86_mov_reg_imm (cfg->code, X86_EAX, mono_profiler_method_leave);
469 x86_call_reg (cfg->code, X86_EAX);
470 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 4);
471 x86_pop_reg (cfg->code, X86_EDX);
472 x86_pop_reg (cfg->code, X86_EAX);
476 if (mono_regset_reg_used (cfg->rs, X86_EBX)) {
477 x86_mov_reg_membase (cfg->code, X86_EBX, X86_EBP, pos, 4);
480 if (mono_regset_reg_used (cfg->rs, X86_EDI)) {
481 x86_mov_reg_membase (cfg->code, X86_EDI, X86_EBP, pos, 4);
484 if (mono_regset_reg_used (cfg->rs, X86_ESI)) {
485 x86_mov_reg_membase (cfg->code, X86_ESI, X86_EBP, pos, 4);
489 x86_leave (cfg->code);
494 mono_label_cfg (MonoFlowGraph *cfg)
498 for (i = 0; i < cfg->block_count; i++) {
499 GPtrArray *forest = cfg->bblocks [i].forest;
502 if (!cfg->bblocks [i].reached) /* unreachable code */
507 for (j = 0; j < top; j++) {
508 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
511 mbstate = mono_burg_label (t1, cfg);
515 if (mono_debug_handle)
517 g_warning ("tree does not match");
518 mono_print_ctree (cfg, t1); printf ("\n\n");
520 mono_print_forest (cfg, forest);
521 g_assert_not_reached ();
528 tree_allocate_regs (MonoFlowGraph *cfg, MBTree *tree, int goal, MonoRegSet *rs,
529 guint8 exclude_mask, int *spillcount)
532 int ern = mono_burg_rule (tree->state, goal);
533 const guint16 *nts = mono_burg_nts [ern];
534 guint8 left_exclude_mask = 0, right_exclude_mask = 0;
537 #ifdef DEBUG_REGALLOC
538 printf ("tree_allocate_regs start %d %08x %d %d\n", tree->op, rs->free_mask, goal,
539 (nts [0] && kids [0] == tree));
542 mono_burg_kids (tree, ern, kids);
548 exclude_mask |= (1 << X86_ECX);
549 left_exclude_mask |= (1 << X86_ECX);
552 case MB_TERM_MUL_OVF:
553 case MB_TERM_MUL_OVF_UN:
558 if (goal == MB_NTERM_reg) {
559 left_exclude_mask |= (1 << X86_EDX);
560 right_exclude_mask |= (1 << X86_EDX) | (1 << X86_EAX);
567 if (nts [0] && kids [0] == tree) {
569 if (!tree_allocate_regs (cfg, kids [0], nts [0], rs, exclude_mask, spillcount))
571 /* special case reg: coni4 */
572 if (goal == MB_NTERM_reg) {
573 if (tree->reg1 == -1)
574 tree->reg1 = mono_regset_alloc_reg (rs, -1, exclude_mask);
575 if (tree->reg1 == -1)
597 if (nts [1]) { /* two kids */
599 if (nts [2]) /* we cant handle three kids */
600 g_assert_not_reached ();
602 if (!tree_allocate_regs (cfg, kids [0], nts [0], rs, left_exclude_mask, spillcount))
607 if (!tree_allocate_regs (cfg, kids [1], nts [1], rs, right_exclude_mask, spillcount)) {
609 #ifdef DEBUG_REGALLOC
610 printf ("tree_allocate_regs try 1 failed %d %d %d %d\n",
611 nts [1], kids [1]->reg1,
612 kids [1]->reg2,kids [1]->reg3);
616 if (kids [0]->reg1 != -1) {
617 right_exclude_mask |= 1 << kids [0]->reg1;
620 if (kids [0]->reg2 != -1) {
621 right_exclude_mask |= 1 << kids [0]->reg2;
624 if (kids [0]->reg3 != -1) {
625 right_exclude_mask |= 1 << kids [0]->reg3;
629 mono_regset_free_reg (rs, kids [0]->reg1);
630 mono_regset_free_reg (rs, kids [0]->reg2);
631 mono_regset_free_reg (rs, kids [0]->reg3);
633 kids [0]->spilled = 1;
635 if (!tree_allocate_regs (cfg, kids [1], nts [1], rs, right_exclude_mask, spillcount)) {
636 #ifdef DEBUG_REGALLOC
637 printf ("tree_allocate_regs try 2 failed\n");
641 #ifdef DEBUG_REGALLOC
642 printf ("tree_allocate_regs try 2 succesfull\n");
646 } else { /* one kid */
647 if (!tree_allocate_regs (cfg, kids [0], nts [0], rs, left_exclude_mask, spillcount))
653 for (i = 0; nts [i]; i++) {
654 mono_regset_free_reg (rs, kids [i]->reg1);
655 mono_regset_free_reg (rs, kids [i]->reg2);
656 mono_regset_free_reg (rs, kids [i]->reg3);
659 tree->emit = mono_burg_func [ern];
662 case MB_TERM_CALL_I4:
663 case MB_TERM_CALL_I8:
664 case MB_TERM_CALL_R8:
665 // case MB_TERM_CALL_VOID :
666 if ((tree->reg1 = mono_regset_alloc_reg (rs, X86_EAX, exclude_mask)) == -1)
668 if ((tree->reg2 = mono_regset_alloc_reg (rs, X86_EDX, exclude_mask)) == -1)
670 if ((tree->reg3 = mono_regset_alloc_reg (rs, X86_ECX, exclude_mask)) == -1)
678 case MB_TERM_MUL_OVF_UN:
683 if ((tree->reg1 = mono_regset_alloc_reg (rs, X86_EAX, exclude_mask)) == -1)
685 if ((tree->reg2 = mono_regset_alloc_reg (rs, X86_EDX, exclude_mask)) == -1)
689 if ((tree->reg1 = mono_regset_alloc_reg (rs, -1, exclude_mask)) == -1)
697 case MB_TERM_MUL_OVF:
698 case MB_TERM_MUL_OVF_UN:
703 if ((tree->reg1 = mono_regset_alloc_reg (rs, X86_EAX, exclude_mask)) == -1)
705 if ((tree->reg2 = mono_regset_alloc_reg (rs, X86_EDX, exclude_mask)) == -1)
709 if ((tree->reg1 = mono_regset_alloc_reg (rs, -1, exclude_mask)) == -1)
711 if ((tree->reg2 = mono_regset_alloc_reg (rs, -1, exclude_mask)) == -1)
717 /* fixme: allocate floating point registers */
721 if (tree->op == MB_TERM_ADD) {
722 if ((tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, exclude_mask)) == -1)
724 if ((tree->reg2 = mono_regset_alloc_reg (rs, tree->right->reg1, exclude_mask)) == -1)
730 if (tree->op == MB_TERM_ADD) {
731 if ((tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, exclude_mask)) == -1)
737 if (tree->op == MB_TERM_SHL ||
738 tree->op == MB_TERM_MUL) {
739 if ((tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, exclude_mask)) == -1)
748 #ifdef DEBUG_REGALLOC
749 printf ("tree_allocate_regs end %d %08x\n", tree->op, rs->free_mask);
755 arch_allocate_regs (MonoFlowGraph *cfg)
757 int i, j, max_spillcount = 0;
759 for (i = 0; i < cfg->block_count; i++) {
760 GPtrArray *forest = cfg->bblocks [i].forest;
763 if (!cfg->bblocks [i].reached) /* unreachable code */
768 for (j = 0; j < top; j++) {
769 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
771 #ifdef DEBUG_REGALLOC
772 printf ("arch_allocate_regs start %d:%d %08x\n", i, j, cfg->rs->free_mask);
774 if (!tree_allocate_regs (cfg, t1, 1, cfg->rs, 0, &spillcount)) {
775 mono_print_ctree (cfg, t1);
777 g_error ("register allocation failed");
780 max_spillcount = MAX (max_spillcount, spillcount);
782 #ifdef DEBUG_REGALLOC
783 printf ("arch_allocate_regs end %d:%d %08x\n", i, j, cfg->rs->free_mask);
785 g_assert (cfg->rs->free_mask == 0xffffffff);
789 /* allocate space for spilled regs */
791 cfg->spillvars = mono_mempool_alloc0 (cfg->mp, sizeof (gint) * max_spillcount);
792 cfg->spillcount = max_spillcount;
794 for (i = 0; i < max_spillcount; i++) {
796 spillvar = arch_allocate_var (cfg, sizeof (gpointer), sizeof (gpointer),
797 MONO_TEMPVAR, VAL_I32);
798 cfg->spillvars [i] = VARINFO (cfg, spillvar).offset;
803 tree_emit (int goal, MonoFlowGraph *cfg, MBTree *tree, int *spillcount)
806 int ern = mono_burg_rule (tree->state, goal);
807 const guint16 *nts = mono_burg_nts [ern];
811 mono_burg_kids (tree, ern, kids);
815 int spilloffset1, spilloffset2, spilloffset3;
818 g_assert_not_reached ();
820 tree_emit (nts [0], cfg, kids [0], spillcount);
822 if (kids [0]->spilled) {
824 printf ("SPILL_REGS %d %03x %s.%s:%s\n",
825 nts [0], cfg->code - cfg->start,
826 cfg->method->klass->name_space,
827 cfg->method->klass->name, cfg->method->name);
829 mono_print_ctree (cfg, kids [0]);printf ("\n\n");
835 if (kids [0]->reg1 != -1) {
836 spilloffset1 = cfg->spillvars [(*spillcount)++];
837 x86_mov_membase_reg (cfg->code, X86_EBP, spilloffset1,
840 if (kids [0]->reg2 != -1) {
841 spilloffset2 = cfg->spillvars [(*spillcount)++];
842 x86_mov_membase_reg (cfg->code, X86_EBP, spilloffset2,
845 if (kids [0]->reg3 != -1) {
846 spilloffset3 = cfg->spillvars [(*spillcount)++];
847 x86_mov_membase_reg (cfg->code, X86_EBP, spilloffset3,
852 tree_emit (nts [1], cfg, kids [1], spillcount);
854 if (kids [0]->spilled) {
857 printf ("RELOAD_REGS %03x %s.%s:%s\n",
858 cfg->code - cfg->start,
859 cfg->method->klass->name_space,
860 cfg->method->klass->name, cfg->method->name);
863 if (kids [0]->reg3 != -1)
864 x86_mov_reg_membase (cfg->code, kids [0]->reg3, X86_EBP,
866 if (kids [0]->reg2 != -1)
867 x86_mov_reg_membase (cfg->code, kids [0]->reg2, X86_EBP,
869 if (kids [0]->reg1 != -1)
870 x86_mov_reg_membase (cfg->code, kids [0]->reg1, X86_EBP,
874 tree_emit (nts [0], cfg, kids [0], spillcount);
878 g_assert ((*spillcount) <= cfg->spillcount);
880 tree->addr = offset = cfg->code - cfg->start;
882 /* we assume an instruction uses a maximum of 128 bytes */
883 if ((cfg->code_size - offset) <= 128) {
884 int add = MIN (cfg->code_size, 128);
885 cfg->code_size += add;
886 mono_jit_stats.code_reallocs++;
887 cfg->start = g_realloc (cfg->start, cfg->code_size);
888 g_assert (cfg->start);
889 cfg->code = cfg->start + offset;
892 if ((emit = mono_burg_func [ern]))
895 g_assert ((cfg->code - cfg->start) < cfg->code_size);
899 mono_emit_cfg (MonoFlowGraph *cfg)
901 int i, j, spillcount;
903 for (i = 0; i < cfg->block_count; i++) {
904 MonoBBlock *bb = &cfg->bblocks [i];
905 GPtrArray *forest = bb->forest;
908 if (!bb->reached) /* unreachable code */
913 bb->addr = cfg->code - cfg->start;
915 for (j = 0; j < top; j++) {
916 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
919 tree_emit (1, cfg, t1, &spillcount);
923 cfg->epilog = cfg->code - cfg->start;
927 mono_compute_branches (MonoFlowGraph *cfg)
935 for (j = 0; j < cfg->block_count; j++) {
936 MonoBBlock *bb = &cfg->bblocks [j];
937 GPtrArray *forest = bb->forest;
940 if (!bb->reached) /* unreachable code */
945 for (i = 0; i < top; i++) {
946 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, i);
948 if (t1->op == MB_TERM_SWITCH) {
949 MonoBBlock **jt = (MonoBBlock **)t1->data.p;
950 guint32 *rt = (guint32 *)t1->data.p;
951 int m = *((guint32 *)t1->data.p) + 1;
954 for (k = 1; k <= m; k++)
955 rt [k] = (int)(jt [k]->addr + cfg->start);
957 /* emit the switch instruction again to update addresses */
958 cfg->code = cfg->start + t1->addr;
959 ((MBEmitFunc)t1->emit) (t1, cfg);
966 for (ji = cfg->jump_info; ji; ji = ji->next) {
967 unsigned char *ip = GUINT_TO_POINTER (GPOINTER_TO_UINT (ji->ip) + cfg->start);
968 unsigned char *target;
971 case MONO_JUMP_INFO_BB:
972 target = ji->data.bb->addr + cfg->start;
974 case MONO_JUMP_INFO_ABS:
975 target = ji->data.target;
977 case MONO_JUMP_INFO_EPILOG:
978 target = cfg->epilog + cfg->start;
980 case MONO_JUMP_INFO_IP:
981 *(unsigned char**)ip = ip;
984 g_assert_not_reached ();
986 x86_patch (ip, target);
991 mono_add_jump_info (MonoFlowGraph *cfg, gpointer ip, MonoJumpInfoType type, gpointer target)
993 MonoJumpInfo *ji = mono_mempool_alloc (cfg->mp, sizeof (MonoJumpInfo));
996 ji->ip = GUINT_TO_POINTER (GPOINTER_TO_UINT (ip) - GPOINTER_TO_UINT (cfg->start));
997 ji->data.target = target;
998 ji->next = cfg->jump_info;
1000 cfg->jump_info = ji;
1004 match_debug_method (MonoMethod* method)
1006 GList *tmp = mono_debug_methods;
1008 for (; tmp; tmp = tmp->next) {
1009 if (mono_method_desc_full_match (tmp->data, method))
1016 * arch_compile_method:
1017 * @method: pointer to the method info
1019 * JIT compilation of a single method.
1021 * Returns: a pointer to the newly created code.
1024 arch_compile_method (MonoMethod *method)
1026 MonoDomain *target_domain, *domain = mono_domain_get ();
1029 GHashTable *jit_code_hash;
1031 if ((method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) ||
1032 (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL)) {
1034 method->info = arch_create_native_wrapper (method);
1035 return method->info;
1038 if (mono_jit_share_code)
1039 target_domain = mono_root_domain;
1041 target_domain = domain;
1043 jit_code_hash = target_domain->jit_code_hash;
1045 if ((addr = g_hash_table_lookup (jit_code_hash, method))) {
1046 mono_jit_stats.methods_lookups++;
1050 mono_jit_stats.methods_compiled++;
1052 if (mono_jit_trace_calls || mono_jit_dump_asm || mono_jit_dump_forest) {
1053 printf ("Start JIT compilation of %s.%s:%s\n", method->klass->name_space,
1054 method->klass->name, method->name);
1057 if (method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) {
1058 const char *name = method->name;
1060 gboolean delegate = FALSE;
1062 if (method->klass->parent == mono_defaults.multicastdelegate_class)
1065 if (delegate && *name == '.' && (strcmp (name, ".ctor") == 0)) {
1066 addr = (gpointer)mono_delegate_ctor;
1067 } else if (delegate && *name == 'I' && (strcmp (name, "Invoke") == 0)) {
1070 addr = arch_get_delegate_invoke (method, &size);
1072 if (mono_jit_dump_asm) {
1073 char *id = g_strdup_printf ("%s.%s_%s", method->klass->name_space,
1074 method->klass->name, method->name);
1075 mono_disassemble_code (addr, size, id);
1078 } else if (delegate && *name == 'B' && (strcmp (name, "BeginInvoke") == 0)) {
1079 code = addr = g_malloc (32);
1080 x86_push_imm (code, method);
1081 x86_call_code (code, arch_begin_invoke);
1082 x86_alu_reg_imm (code, X86_ADD, X86_ESP, 4);
1084 g_assert ((code - addr) <= 32);
1085 } else if (delegate && *name == 'E' && (strcmp (name, "EndInvoke") == 0)) {
1086 /* this can raise exceptions, so we need a wrapper to save/restore LMF */
1087 method->addr = (gpointer)arch_end_invoke;
1088 addr = arch_create_native_wrapper (method);
1090 mono_profiler_method_end_jit (method, MONO_PROFILE_FAILED);
1091 if (mono_debug_handle)
1094 g_error ("Don't know how to exec runtime method %s.%s::%s",
1095 method->klass->name_space, method->klass->name, method->name);
1099 MonoMethodHeader *header = ((MonoMethodNormal *)method)->header;
1102 gulong code_size_ratio;
1103 guint32 ls_used_mask = 0;
1105 mono_profiler_method_jit (method);
1107 ji = mono_mempool_alloc0 (target_domain->mp, sizeof (MonoJitInfo));
1109 mp = mono_mempool_new ();
1111 cfg = mono_cfg_new (method, mp);
1113 mono_analyze_flow (cfg);
1115 mono_profiler_method_end_jit (method, MONO_PROFILE_FAILED);
1119 mono_analyze_stack (cfg);
1121 mono_profiler_method_end_jit (method, MONO_PROFILE_FAILED);
1125 cfg->rs = mono_regset_new (X86_NREG);
1126 mono_regset_reserve_reg (cfg->rs, X86_ESP);
1127 mono_regset_reserve_reg (cfg->rs, X86_EBP);
1129 /* we can use this regs for global register allocation */
1130 mono_regset_reserve_reg (cfg->rs, X86_EBX);
1131 mono_regset_reserve_reg (cfg->rs, X86_ESI);
1133 cfg->code_size = MAX (header->code_size * 5, 256);
1134 cfg->start = cfg->code = g_malloc (cfg->code_size);
1136 mono_debug_last_breakpoint_address = cfg->code;
1138 if (match_debug_method (method) || mono_debug_insert_breakpoint)
1139 x86_breakpoint (cfg->code);
1140 else if (mono_debug_handle)
1141 x86_nop (cfg->code);
1143 if (mono_debug_insert_breakpoint > 0)
1144 mono_debug_insert_breakpoint--;
1146 if (mono_use_linear_scan) {
1147 mono_linear_scan (cfg, &ls_used_mask);
1148 cfg->rs->used_mask |= ls_used_mask;
1151 if (mono_jit_dump_forest) {
1153 printf ("FOREST %s.%s:%s\n", method->klass->name_space,
1154 method->klass->name, method->name);
1155 for (i = 0; i < cfg->block_count; i++) {
1156 printf ("BLOCK %d:\n", i);
1157 mono_print_forest (cfg, cfg->bblocks [i].forest);
1161 mono_label_cfg (cfg);
1164 mono_profiler_method_end_jit (method, MONO_PROFILE_FAILED);
1168 arch_allocate_regs (cfg);
1170 /* align to 8 byte boundary */
1171 cfg->locals_size += 7;
1172 cfg->locals_size &= ~7;
1174 arch_emit_prologue (cfg);
1175 cfg->prologue_end = cfg->code - cfg->start;
1176 mono_emit_cfg (cfg);
1177 arch_emit_epilogue (cfg);
1178 cfg->epilogue_end = cfg->code - cfg->start;
1182 mono_jit_stats.allocated_code_size += cfg->code_size;
1184 code_size_ratio = cfg->code - cfg->start;
1185 if (code_size_ratio > mono_jit_stats.biggest_method_size) {
1186 mono_jit_stats.biggest_method_size = code_size_ratio;
1187 mono_jit_stats.biggest_method = method;
1189 code_size_ratio = (code_size_ratio * 100) / header->code_size;
1190 if (code_size_ratio > mono_jit_stats.max_code_size_ratio) {
1191 mono_jit_stats.max_code_size_ratio = code_size_ratio;
1192 mono_jit_stats.max_ratio_method = method;
1195 mono_compute_branches (cfg);
1197 if (mono_jit_dump_asm) {
1198 char *id = g_strdup_printf ("%s.%s_%s", method->klass->name_space,
1199 method->klass->name, method->name);
1200 mono_disassemble_code (cfg->start, cfg->code - cfg->start, id);
1203 if (mono_debug_handle)
1204 mono_debug_add_method (mono_debug_handle, cfg);
1206 ji->code_size = cfg->code - cfg->start;
1207 ji->used_regs = cfg->rs->used_mask;
1208 ji->method = method;
1209 ji->code_start = addr;
1211 mono_jit_stats.native_code_size += ji->code_size;
1213 if (header->num_clauses) {
1214 int i, start_block, end_block;
1216 ji->num_clauses = header->num_clauses;
1217 ji->clauses = mono_mempool_alloc0 (target_domain->mp,
1218 sizeof (MonoJitExceptionInfo) * header->num_clauses);
1220 for (i = 0; i < header->num_clauses; i++) {
1221 MonoExceptionClause *ec = &header->clauses [i];
1222 MonoJitExceptionInfo *ei = &ji->clauses [i];
1224 ei->flags = ec->flags;
1225 ei->token_or_filter = ec->token_or_filter;
1227 g_assert (cfg->bcinfo [ec->try_offset].is_block_start);
1228 start_block = cfg->bcinfo [ec->try_offset].block_id;
1229 end_block = cfg->bcinfo [ec->try_offset + ec->try_len].block_id;
1230 g_assert (cfg->bcinfo [ec->try_offset + ec->try_len].is_block_start);
1232 ei->try_start = cfg->start + cfg->bblocks [start_block].addr;
1233 ei->try_end = cfg->start + cfg->bblocks [end_block].addr;
1235 g_assert (cfg->bcinfo [ec->handler_offset].is_block_start);
1236 start_block = cfg->bcinfo [ec->handler_offset].block_id;
1237 ei->handler_start = cfg->start + cfg->bblocks [start_block].addr;
1239 //printf ("TEST %x %x %x\n", ei->try_start, ei->try_end, ei->handler_start);
1243 mono_jit_info_table_add (target_domain, ji);
1245 mono_regset_free (cfg->rs);
1247 mono_cfg_free (cfg);
1249 mono_mempool_destroy (mp);
1251 mono_profiler_method_end_jit (method, MONO_PROFILE_OK);
1254 if (mono_jit_trace_calls || mono_jit_dump_asm || mono_jit_dump_forest) {
1255 printf ("END JIT compilation of %s.%s:%s %p %p\n", method->klass->name_space,
1256 method->klass->name, method->name, method, addr);
1259 g_hash_table_insert (jit_code_hash, method, addr);