5 #include <mono/metadata/appdomain.h>
6 #include <mono/metadata/metadata-internals.h>
7 #include <mono/metadata/marshal.h>
8 #include <mono/metadata/tabledefs.h>
9 #include <mono/utils/mono-counters.h>
11 #ifdef HAVE_VALGRIND_MEMCHECK_H
12 #include <valgrind/memcheck.h>
16 #include "debug-mini.h"
19 * Address of the trampoline code. This is used by the debugger to check
20 * whether a method is a trampoline.
22 guint8* mono_trampoline_code [MONO_TRAMPOLINE_NUM];
24 static GHashTable *class_init_hash_addr = NULL;
25 static GHashTable *rgctx_lazy_fetch_trampoline_hash = NULL;
26 static GHashTable *rgctx_lazy_fetch_trampoline_hash_addr = NULL;
28 #define mono_trampolines_lock() EnterCriticalSection (&trampolines_mutex)
29 #define mono_trampolines_unlock() LeaveCriticalSection (&trampolines_mutex)
30 static CRITICAL_SECTION trampolines_mutex;
33 get_unbox_trampoline (MonoGenericSharingContext *gsctx, MonoMethod *m, gpointer addr, gboolean need_rgctx_tramp)
38 * The unbox trampolines call the method directly, so need to add
39 * an rgctx tramp before them.
41 return mono_create_static_rgctx_trampoline (m, mono_aot_get_unbox_trampoline (m));
43 return mono_aot_get_unbox_trampoline (m);
45 return mono_arch_get_unbox_trampoline (gsctx, m, addr);
49 #ifdef MONO_ARCH_HAVE_STATIC_RGCTX_TRAMPOLINE
51 * mono_create_static_rgctx_trampoline:
53 * Return a static rgctx trampoline for M which branches to ADDR which should
54 * point to the compiled code of M.
56 * Static rgctx trampolines are used when a shared generic method which doesn't
57 * have a this argument is called indirectly, ie. from code which can't pass in
58 * the rgctx argument. The trampoline sets the rgctx argument and jumps to the
59 * methods code. These trampolines are similar to the unbox trampolines, they
60 * perform the same task as the static rgctx wrappers, but they are smaller/faster,
61 * and can be made to work with full AOT.
64 mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr)
70 if (mini_method_get_context (m)->method_inst)
71 ctx = mono_method_lookup_rgctx (mono_class_vtable (mono_domain_get (), m->klass), mini_method_get_context (m)->method_inst);
73 ctx = mono_class_vtable (mono_domain_get (), m->klass);
76 return mono_aot_get_static_rgctx_trampoline (ctx, addr);
78 domain = mono_domain_get ();
80 mono_domain_lock (domain);
81 res = g_hash_table_lookup (domain_jit_info (domain)->static_rgctx_trampoline_hash,
83 mono_domain_unlock (domain);
87 res = mono_arch_get_static_rgctx_trampoline (m, ctx, addr);
89 mono_domain_lock (domain);
90 /* Duplicates inserted while we didn't hold the lock are OK */
91 g_hash_table_insert (domain_jit_info (domain)->static_rgctx_trampoline_hash, m, res);
92 mono_domain_unlock (domain);
98 mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr)
101 * This shouldn't happen as all arches which support generic sharing support
102 * static rgctx trampolines as well.
104 g_assert_not_reached ();
109 mono_get_vcall_slot_addr (guint8* code, mgreg_t *regs)
113 vt = mono_arch_get_vcall_slot (code, regs, &displacement);
116 return (gpointer*)((char*)vt + displacement);
119 #ifdef MONO_ARCH_HAVE_IMT
122 mono_convert_imt_slot_to_vtable_slot (gpointer* slot, mgreg_t *regs, guint8 *code, MonoMethod *method, MonoMethod **impl_method, gboolean *need_rgctx_tramp)
124 MonoGenericSharingContext *gsctx = mono_get_generic_context_from_code (code);
125 MonoObject *this_argument = mono_arch_find_this_argument (regs, method, gsctx);
126 MonoVTable *vt = this_argument->vtable;
127 int displacement = slot - ((gpointer*)vt);
129 if (displacement > 0) {
130 /* slot is in the vtable, not in the IMT */
132 printf ("mono_convert_imt_slot_to_vtable_slot: slot %p is in the vtable, not in the IMT\n", slot);
136 MonoMethod *imt_method = mono_arch_find_imt_method (regs, code);
137 int interface_offset;
138 int imt_slot = MONO_IMT_SIZE + displacement;
140 interface_offset = mono_class_interface_offset (vt->klass, imt_method->klass);
142 if (interface_offset < 0) {
143 g_print ("%s doesn't implement interface %s\n", mono_type_get_name_full (&vt->klass->byval_arg, 0), mono_type_get_name_full (&imt_method->klass->byval_arg, 0));
144 g_assert_not_reached ();
146 mono_vtable_build_imt_slot (vt, mono_method_get_imt_slot (imt_method));
151 if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) {
152 MonoGenericContext context = { NULL, NULL };
155 * Generic virtual method, imt_method contains the inflated interface
156 * method, need to get the inflated impl method.
158 /* imt_method->slot might not be set */
159 impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_declaring_generic_method (imt_method)->slot);
161 if (impl->klass->generic_class)
162 context.class_inst = impl->klass->generic_class->context.class_inst;
163 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
164 impl = mono_class_inflate_generic_method (impl, &context);
166 impl = mono_class_get_vtable_entry (vt->klass, interface_offset + imt_method->slot);
169 if (mono_method_needs_static_rgctx_invoke (impl, FALSE))
170 *need_rgctx_tramp = TRUE;
174 printf ("mono_convert_imt_slot_to_vtable_slot: method = %s.%s.%s, imt_method = %s.%s.%s\n",
175 method->klass->name_space, method->klass->name, method->name,
176 imt_method->klass->name_space, imt_method->klass->name, imt_method->name);
179 g_assert (imt_slot < MONO_IMT_SIZE);
180 if (vt->imt_collisions_bitmap & (1 << imt_slot)) {
181 int slot = mono_method_get_vtable_index (imt_method);
183 gpointer *vtable_slot;
185 g_assert (slot != -1);
186 vtable_offset = interface_offset + slot;
187 vtable_slot = & (vt->vtable [vtable_offset]);
189 printf ("mono_convert_imt_slot_to_vtable_slot: slot %p[%d] is in the IMT, and colliding becomes %p[%d] (interface_offset = %d, method->slot = %d)\n", slot, imt_slot, vtable_slot, vtable_offset, interface_offset, imt_method->slot);
194 printf ("mono_convert_imt_slot_to_vtable_slot: slot %p[%d] is in the IMT, but not colliding\n", slot, imt_slot);
203 * common_call_trampoline:
205 * The code to handle normal, virtual, and interface method calls and jumps, both
206 * from JITted and LLVM compiled code.
209 common_call_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp, MonoVTable *vt, gpointer *vtable_slot, gboolean need_rgctx_tramp)
212 gboolean generic_shared = FALSE;
214 MonoMethod *declaring = NULL;
215 MonoMethod *generic_virtual = NULL;
217 gboolean proxy = FALSE;
218 gpointer *orig_vtable_slot;
222 orig_vtable_slot = vtable_slot;
224 if (m == MONO_FAKE_VTABLE_METHOD) {
230 ji = mono_jit_info_table_find (mono_domain_get (), (char*)code);
232 printf ("Caller: %s\n", mono_method_full_name (ji->method, TRUE));
233 /* Print some debug info */
234 for (i = 0; i < 32; ++i)
235 printf ("0x%x ", code [-32 + i]);
239 displacement = (guint8*)vtable_slot - (guint8*)vt;
240 if (displacement > 0) {
241 int slot = (displacement - G_STRUCT_OFFSET (MonoVTable, vtable)) / sizeof (gpointer);
242 g_assert (slot >= 0);
244 /* Avoid loading metadata or creating a generic vtable if possible */
245 addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, slot);
247 addr = mono_create_ftnptr (mono_domain_get (), addr);
248 if (addr && !vt->klass->valuetype) {
249 vtable_slot = mono_get_vcall_slot_addr (code, regs);
250 if (mono_aot_is_got_entry (code, (guint8*)vtable_slot) || mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot)) {
251 *vtable_slot = mono_get_addr_from_ftnptr (addr);
257 m = mono_class_get_vtable_entry (vt->klass, slot);
258 if (mono_method_needs_static_rgctx_invoke (m, FALSE))
259 need_rgctx_tramp = TRUE;
261 /*g_print ("%s with disp %d: %s at %p\n", vt->klass->name, displacement, m->name, code);*/
263 /* We got here from an interface method: redirect to IMT handling */
264 m = MONO_FAKE_IMT_METHOD;
265 /*g_print ("vtable with disp %d at %p\n", displacement, code);*/
269 /* this is the IMT trampoline */
270 #ifdef MONO_ARCH_HAVE_IMT
271 if (m == MONO_FAKE_IMT_METHOD) {
272 MonoMethod *impl_method;
273 MonoGenericSharingContext *gsctx;
274 MonoObject *this_arg;
276 /* we get the interface method because mono_convert_imt_slot_to_vtable_slot ()
277 * needs the signature to be able to find the this argument
279 m = mono_arch_find_imt_method (regs, code);
280 vtable_slot = orig_vtable_slot;
281 g_assert (vtable_slot);
283 gsctx = mono_get_generic_context_from_code (code);
284 this_arg = mono_arch_find_this_argument (regs, m, gsctx);
286 if (this_arg->vtable->klass == mono_defaults.transparent_proxy_class) {
287 /* Use the slow path for now */
289 m = mono_object_get_virtual_method (this_arg, m);
291 vtable_slot = mono_convert_imt_slot_to_vtable_slot (vtable_slot, regs, code, m, &impl_method, &need_rgctx_tramp);
292 /* mono_convert_imt_slot_to_vtable_slot () also gives us the method that is supposed
293 * to be called, so we compile it and go ahead as usual.
295 /*g_print ("imt found method %p (%s) at %p\n", impl_method, impl_method->name, code);*/
296 if (m->is_inflated && ((MonoMethodInflated*)m)->context.method_inst) {
297 /* Generic virtual method */
300 need_rgctx_tramp = TRUE;
309 MonoGenericContext context = { NULL, NULL };
310 MonoMethod *declaring;
313 declaring = mono_method_get_declaring_generic_method (m);
317 if (m->klass->generic_class)
318 context.class_inst = m->klass->generic_class->context.class_inst;
320 g_assert (!m->klass->generic_container);
322 #ifdef MONO_ARCH_HAVE_IMT
323 generic_virtual = mono_arch_find_imt_method (regs, code);
325 if (generic_virtual) {
326 g_assert (generic_virtual->is_inflated);
327 context.method_inst = ((MonoMethodInflated*)generic_virtual)->context.method_inst;
330 m = mono_class_inflate_generic_method (declaring, &context);
331 /* FIXME: only do this if the method is sharable */
332 need_rgctx_tramp = TRUE;
333 } else if ((context_used = mono_method_check_context_used (m))) {
334 MonoClass *klass = NULL;
335 MonoMethod *actual_method = NULL;
336 MonoVTable *vt = NULL;
337 MonoGenericInst *method_inst = NULL;
340 generic_shared = TRUE;
344 if (m->is_inflated && mono_method_get_context (m)->method_inst) {
345 #ifdef MONO_ARCH_RGCTX_REG
346 MonoMethodRuntimeGenericContext *mrgctx = (MonoMethodRuntimeGenericContext*)mono_arch_find_static_call_vtable (regs, code);
348 klass = mrgctx->class_vtable->klass;
349 method_inst = mrgctx->method_inst;
351 g_assert_not_reached ();
353 } else if ((m->flags & METHOD_ATTRIBUTE_STATIC) || m->klass->valuetype) {
354 #ifdef MONO_ARCH_RGCTX_REG
355 MonoVTable *vtable = mono_arch_find_static_call_vtable (regs, code);
357 klass = vtable->klass;
359 g_assert_not_reached ();
362 #ifdef MONO_ARCH_HAVE_IMT
363 MonoObject *this_argument = mono_arch_find_this_argument (regs, m,
364 mono_get_generic_context_from_code (code));
366 vt = this_argument->vtable;
367 vtable_slot = orig_vtable_slot;
369 g_assert (this_argument->vtable->klass->inited);
370 //mono_class_init (this_argument->vtable->klass);
373 klass = this_argument->vtable->klass->supertypes [m->klass->idepth - 1];
379 g_assert (vtable_slot || klass);
382 int displacement = vtable_slot - ((gpointer*)vt);
384 g_assert_not_reached ();
386 g_assert (displacement > 0);
388 actual_method = vt->klass->vtable [displacement];
392 MonoGenericContext context = { NULL, NULL };
395 declaring = mono_method_get_declaring_generic_method (m);
399 if (klass->generic_class)
400 context.class_inst = klass->generic_class->context.class_inst;
401 else if (klass->generic_container)
402 context.class_inst = klass->generic_container->context.class_inst;
403 context.method_inst = method_inst;
405 actual_method = mono_class_inflate_generic_method (declaring, &context);
407 actual_method = mono_class_get_method_generic (klass, m);
411 g_assert (actual_method->klass == klass);
413 if (actual_method->is_inflated)
414 declaring = mono_method_get_declaring_generic_method (actual_method);
421 if (m->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) {
425 ji = mono_jit_info_table_find (mono_domain_get (), (char*)code);
429 /* Avoid recursion */
430 if (!(ji && ji->method->wrapper_type == MONO_WRAPPER_SYNCHRONIZED))
431 m = mono_marshal_get_synchronized_wrapper (m);
434 /* Calls made through delegates on platforms without delegate trampolines */
435 if (!code && mono_method_needs_static_rgctx_invoke (m, FALSE))
436 need_rgctx_tramp = TRUE;
438 addr = mono_compile_method (m);
441 mono_debugger_trampoline_compiled (code, m, addr);
443 if (need_rgctx_tramp)
444 addr = mono_create_static_rgctx_trampoline (m, addr);
446 if (generic_virtual) {
447 vtable_slot = orig_vtable_slot;
448 g_assert (vtable_slot);
450 if (vt->klass->valuetype)
451 addr = get_unbox_trampoline (mono_get_generic_context_from_code (code), m, addr, need_rgctx_tramp);
453 mono_method_add_generic_virtual_invocation (mono_domain_get (),
455 generic_virtual, addr);
460 /* the method was jumped to */
462 MonoDomain *domain = mono_domain_get ();
464 /* Patch the got entries pointing to this method */
466 * We do this here instead of in mono_codegen () to cover the case when m
467 * was loaded from an aot image.
469 if (domain_jit_info (domain)->jump_target_got_slot_hash) {
472 mono_domain_lock (domain);
473 list = g_hash_table_lookup (domain_jit_info (domain)->jump_target_got_slot_hash, m);
475 for (tmp = list; tmp; tmp = tmp->next) {
476 gpointer *got_slot = tmp->data;
479 g_hash_table_remove (domain_jit_info (domain)->jump_target_got_slot_hash, m);
482 mono_domain_unlock (domain);
488 vtable_slot = orig_vtable_slot;
491 if (m->klass->valuetype)
492 addr = get_unbox_trampoline (mono_get_generic_context_from_code (code), m, addr, need_rgctx_tramp);
493 g_assert (*vtable_slot);
495 if (!proxy && (mono_aot_is_got_entry (code, (guint8*)vtable_slot) || mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))) {
496 #ifdef MONO_ARCH_HAVE_IMT
497 vtable_slot = mono_convert_imt_slot_to_vtable_slot (vtable_slot, regs, code, m, NULL, &need_rgctx_tramp);
499 *vtable_slot = mono_get_addr_from_ftnptr (addr);
503 guint8 *plt_entry = mono_aot_get_plt_entry (code);
506 mono_arch_patch_plt_entry (plt_entry, NULL, regs, addr);
507 } else if (!generic_shared || (m->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) ||
508 mono_domain_lookup_shared_generic (mono_domain_get (), declaring)) {
509 if (generic_shared) {
510 if (m->wrapper_type != MONO_WRAPPER_NONE)
511 m = mono_marshal_method_from_wrapper (m);
512 g_assert (mono_method_is_generic_sharable_impl (m, FALSE));
515 /* Patch calling code */
520 mono_jit_info_table_find (mono_domain_get (), (char*)code);
521 MonoJitInfo *target_ji =
522 mono_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (addr));
524 if (mono_method_same_domain (ji, target_ji))
525 mono_arch_patch_callsite (ji->code_start, code, addr);
534 * mono_magic_trampoline:
536 * This trampoline handles calls from JITted code.
539 mono_magic_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp)
541 gpointer *vtable_slot;
545 if (code && !mono_use_llvm)
546 vt = mono_arch_get_vcall_slot (code, regs, &displacement);
550 vtable_slot = (gpointer*)((char*)vt + displacement);
554 return common_call_trampoline (regs, code, arg, tramp, vt, vtable_slot, FALSE);
557 #ifdef MONO_ARCH_LLVM_SUPPORTED
559 * mono_llvm_vcall_trampoline:
561 * This trampoline handles virtual calls when using LLVM.
564 mono_llvm_vcall_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8 *tramp)
568 gpointer *vtable_slot;
572 * We have the method which is called, we need to obtain the vtable slot without
573 * disassembly which is impossible with LLVM.
574 * So we use the this argument.
576 this = mono_arch_get_this_arg_from_call (NULL, mono_method_signature (m), regs, code);
579 slot = mono_method_get_vtable_slot (m);
581 g_assert (slot != -1);
583 g_assert (this->vtable->klass->vtable [slot] == m);
587 g_assert (!m->is_generic);
589 vtable_slot = &(vt->vtable [slot]);
591 return common_call_trampoline (regs, code, m, tramp, vt, vtable_slot, mono_method_needs_static_rgctx_invoke (m, 0));
596 mono_generic_virtual_remoting_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8 *tramp)
598 MonoGenericContext context = { NULL, NULL };
599 MonoMethod *imt_method, *declaring;
602 g_assert (m->is_generic);
605 declaring = mono_method_get_declaring_generic_method (m);
609 if (m->klass->generic_class)
610 context.class_inst = m->klass->generic_class->context.class_inst;
612 g_assert (!m->klass->generic_container);
614 #ifdef MONO_ARCH_HAVE_IMT
615 imt_method = mono_arch_find_imt_method (regs, code);
616 if (imt_method->is_inflated)
617 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
619 m = mono_class_inflate_generic_method (declaring, &context);
620 m = mono_marshal_get_remoting_invoke_with_check (m);
622 addr = mono_compile_method (m);
625 mono_debugger_trampoline_compiled (NULL, m, addr);
631 * mono_aot_trampoline:
633 * This trampoline handles calls made from AOT code. We try to bypass the
634 * normal JIT compilation logic to avoid loading the metadata for the method.
636 #ifdef MONO_ARCH_AOT_SUPPORTED
638 mono_aot_trampoline (mgreg_t *regs, guint8 *code, guint8 *token_info,
643 MonoMethod *method = NULL;
645 gpointer *vtable_slot;
646 gboolean is_got_entry;
648 gboolean need_rgctx_tramp = FALSE;
650 image = *(gpointer*)(gpointer)token_info;
651 token_info += sizeof (gpointer);
652 token = *(guint32*)(gpointer)token_info;
654 addr = mono_aot_get_method_from_token (mono_domain_get (), image, token);
656 method = mono_get_method (image, token, NULL);
659 /* Use the generic code */
660 return mono_magic_trampoline (regs, code, method, tramp);
663 addr = mono_create_ftnptr (mono_domain_get (), addr);
665 vtable_slot = mono_get_vcall_slot_addr (code, regs);
666 g_assert (!vtable_slot);
668 /* This is a normal call through a PLT entry */
669 plt_entry = mono_aot_get_plt_entry (code);
670 g_assert (plt_entry);
672 mono_arch_patch_plt_entry (plt_entry, NULL, regs, addr);
674 is_got_entry = FALSE;
677 * Since AOT code is only used in the root domain,
678 * mono_domain_get () != mono_get_root_domain () means the calling method
679 * is AppDomain:InvokeInDomain, so this is the same check as in
680 * mono_method_same_domain () but without loading the metadata for the method.
682 if ((is_got_entry && (mono_domain_get () == mono_get_root_domain ())) || mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot)) {
683 #ifdef MONO_ARCH_HAVE_IMT
685 method = mono_get_method (image, token, NULL);
686 vtable_slot = mono_convert_imt_slot_to_vtable_slot (vtable_slot, regs, code, method, NULL, &need_rgctx_tramp);
695 * mono_aot_plt_trampoline:
697 * This trampoline handles calls made from AOT code through the PLT table.
700 mono_aot_plt_trampoline (mgreg_t *regs, guint8 *code, guint8 *aot_module,
703 guint32 plt_info_offset = mono_aot_get_plt_info_offset (regs, code);
705 return mono_aot_plt_resolve (aot_module, plt_info_offset, code);
710 * mono_class_init_trampoline:
712 * This method calls mono_runtime_class_init () to run the static constructor
713 * for the type, then patches the caller code so it is not called again.
716 mono_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp)
718 guint8 *plt_entry = mono_aot_get_plt_entry (code);
720 mono_runtime_class_init (vtable);
723 mono_arch_nullify_plt_entry (plt_entry, regs);
725 mono_arch_nullify_class_init_trampoline (code, regs);
730 * mono_generic_class_init_trampoline:
732 * This method calls mono_runtime_class_init () to run the static constructor
736 mono_generic_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp)
738 mono_runtime_class_init (vtable);
742 mono_rgctx_lazy_fetch_trampoline (mgreg_t *regs, guint8 *code, gpointer data, guint8 *tramp)
744 #ifdef MONO_ARCH_VTABLE_REG
745 static gboolean inited = FALSE;
746 static int num_lookups = 0;
747 guint32 slot = GPOINTER_TO_UINT (data);
748 mgreg_t *r = (mgreg_t*)regs;
749 gpointer arg = (gpointer)(gssize)r [MONO_ARCH_VTABLE_REG];
750 guint32 index = MONO_RGCTX_SLOT_INDEX (slot);
751 gboolean mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
754 mono_counters_register ("RGCTX unmanaged lookups", MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_lookups);
761 return mono_method_fill_runtime_generic_context (arg, index);
763 return mono_class_fill_runtime_generic_context (arg, index);
765 g_assert_not_reached ();
770 mono_monitor_enter_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
772 mono_monitor_enter (obj);
776 mono_monitor_exit_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
778 mono_monitor_exit (obj);
781 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
784 * mono_delegate_trampoline:
786 * This trampoline handles calls made to Delegate:Invoke ().
787 * This is called once the first time a delegate is invoked, so it must be fast.
790 mono_delegate_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp)
792 MonoDomain *domain = mono_domain_get ();
793 MonoDelegate *delegate;
796 MonoMethod *method = NULL;
797 gboolean multicast, callvirt;
798 gboolean need_rgctx_tramp = FALSE;
799 MonoMethod *invoke = tramp_data [0];
800 guint8 *impl_this = tramp_data [1];
801 guint8 *impl_nothis = tramp_data [2];
803 /* Obtain the delegate object according to the calling convention */
806 * Avoid calling mono_get_generic_context_from_code () now since it is expensive,
807 * get_this_arg_from_call will call it if needed.
809 delegate = mono_arch_get_this_arg_from_call (NULL, mono_method_signature (invoke), regs, code);
811 if (delegate->method) {
812 method = delegate->method;
815 * delegate->method_ptr == NULL means the delegate was initialized by
816 * mini_delegate_ctor, while != NULL means it is initialized by
817 * mono_delegate_ctor_with_method (). In both cases, we need to add wrappers
818 * (ctor_with_method () does this, but it doesn't store the wrapper back into
821 if (delegate->target && delegate->target->vtable->klass == mono_defaults.transparent_proxy_class) {
823 if (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class != mono_defaults.com_object_class &&
824 !((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class->is_com_object)
826 method = mono_marshal_get_remoting_invoke (method);
828 else if (mono_method_signature (method)->hasthis && method->klass->valuetype)
829 method = mono_marshal_get_unbox_wrapper (method);
831 ji = mono_jit_info_table_find (domain, mono_get_addr_from_ftnptr (delegate->method_ptr));
835 callvirt = !delegate->target && method && mono_method_signature (method)->hasthis;
837 if (method && method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
838 method = mono_marshal_get_synchronized_wrapper (method);
840 if (method && mono_method_needs_static_rgctx_invoke (method, FALSE))
841 need_rgctx_tramp = TRUE;
844 * If the called address is a trampoline, replace it with the compiled method so
845 * further calls don't have to go through the trampoline.
847 if (method && !callvirt) {
848 /* Avoid the overhead of looking up an already compiled method if possible */
849 if (delegate->method_code && *delegate->method_code) {
850 delegate->method_ptr = *delegate->method_code;
852 delegate->method_ptr = mono_compile_method (method);
853 if (delegate->method_code)
854 *delegate->method_code = delegate->method_ptr;
855 mono_debugger_trampoline_compiled (NULL, method, delegate->method_ptr);
859 if (need_rgctx_tramp)
860 delegate->method_ptr = mono_create_static_rgctx_trampoline (method, delegate->method_ptr);
862 multicast = ((MonoMulticastDelegate*)delegate)->prev != NULL;
863 if (!multicast && !callvirt) {
864 if (method && (method->flags & METHOD_ATTRIBUTE_STATIC) && mono_method_signature (method)->param_count == mono_method_signature (invoke)->param_count + 1)
865 /* Closed static delegate */
868 code = delegate->target ? impl_this : impl_nothis;
871 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
876 /* The general, unoptimized case */
877 m = mono_marshal_get_delegate_invoke (invoke, delegate);
878 code = mono_compile_method (m);
879 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
880 mono_debugger_trampoline_compiled (NULL, m, delegate->invoke_impl);
888 * mono_get_trampoline_func:
890 * Return the C function which needs to be called by the generic trampoline of type
894 mono_get_trampoline_func (MonoTrampolineType tramp_type)
896 switch (tramp_type) {
897 case MONO_TRAMPOLINE_JIT:
898 case MONO_TRAMPOLINE_JUMP:
899 return mono_magic_trampoline;
900 case MONO_TRAMPOLINE_CLASS_INIT:
901 return mono_class_init_trampoline;
902 case MONO_TRAMPOLINE_GENERIC_CLASS_INIT:
903 return mono_generic_class_init_trampoline;
904 case MONO_TRAMPOLINE_RGCTX_LAZY_FETCH:
905 return mono_rgctx_lazy_fetch_trampoline;
906 #ifdef MONO_ARCH_AOT_SUPPORTED
907 case MONO_TRAMPOLINE_AOT:
908 return mono_aot_trampoline;
909 case MONO_TRAMPOLINE_AOT_PLT:
910 return mono_aot_plt_trampoline;
912 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
913 case MONO_TRAMPOLINE_DELEGATE:
914 return mono_delegate_trampoline;
916 case MONO_TRAMPOLINE_RESTORE_STACK_PROT:
917 return mono_altstack_restore_prot;
918 case MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING:
919 return mono_generic_virtual_remoting_trampoline;
920 case MONO_TRAMPOLINE_MONITOR_ENTER:
921 return mono_monitor_enter_trampoline;
922 case MONO_TRAMPOLINE_MONITOR_EXIT:
923 return mono_monitor_exit_trampoline;
924 #ifdef MONO_ARCH_LLVM_SUPPORTED
925 case MONO_TRAMPOLINE_LLVM_VCALL:
926 return mono_llvm_vcall_trampoline;
929 g_assert_not_reached ();
935 mono_trampolines_init (void)
937 InitializeCriticalSection (&trampolines_mutex);
942 mono_trampoline_code [MONO_TRAMPOLINE_JIT] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_JIT);
943 mono_trampoline_code [MONO_TRAMPOLINE_JUMP] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_JUMP);
944 mono_trampoline_code [MONO_TRAMPOLINE_CLASS_INIT] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_CLASS_INIT);
945 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_CLASS_INIT] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_GENERIC_CLASS_INIT);
946 mono_trampoline_code [MONO_TRAMPOLINE_RGCTX_LAZY_FETCH] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_RGCTX_LAZY_FETCH);
947 #ifdef MONO_ARCH_AOT_SUPPORTED
948 mono_trampoline_code [MONO_TRAMPOLINE_AOT] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_AOT);
949 mono_trampoline_code [MONO_TRAMPOLINE_AOT_PLT] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_AOT_PLT);
951 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
952 mono_trampoline_code [MONO_TRAMPOLINE_DELEGATE] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_DELEGATE);
954 mono_trampoline_code [MONO_TRAMPOLINE_RESTORE_STACK_PROT] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_RESTORE_STACK_PROT);
955 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING);
956 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_ENTER] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_MONITOR_ENTER);
957 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_EXIT] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_MONITOR_EXIT);
958 #ifdef MONO_ARCH_LLVM_SUPPORTED
959 mono_trampoline_code [MONO_TRAMPOLINE_LLVM_VCALL] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_LLVM_VCALL);
964 mono_trampolines_cleanup (void)
966 if (class_init_hash_addr)
967 g_hash_table_destroy (class_init_hash_addr);
969 DeleteCriticalSection (&trampolines_mutex);
973 mono_get_trampoline_code (MonoTrampolineType tramp_type)
975 g_assert (mono_trampoline_code [tramp_type]);
977 return mono_trampoline_code [tramp_type];
981 mono_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
984 return mono_aot_create_specific_trampoline (mono_defaults.corlib, arg1, tramp_type, domain, code_len);
986 return mono_arch_create_specific_trampoline (arg1, tramp_type, domain, code_len);
990 mono_create_class_init_trampoline (MonoVTable *vtable)
993 MonoDomain *domain = vtable->domain;
995 g_assert (!vtable->klass->generic_container);
997 /* previously created trampoline code */
998 mono_domain_lock (domain);
1000 g_hash_table_lookup (domain_jit_info (domain)->class_init_trampoline_hash,
1002 mono_domain_unlock (domain);
1006 code = mono_create_specific_trampoline (vtable, MONO_TRAMPOLINE_CLASS_INIT, domain, NULL);
1008 ptr = mono_create_ftnptr (domain, code);
1010 /* store trampoline address */
1011 mono_domain_lock (domain);
1012 g_hash_table_insert (domain_jit_info (domain)->class_init_trampoline_hash,
1014 mono_domain_unlock (domain);
1016 mono_trampolines_lock ();
1017 if (!class_init_hash_addr)
1018 class_init_hash_addr = g_hash_table_new (NULL, NULL);
1019 g_hash_table_insert (class_init_hash_addr, ptr, vtable);
1020 mono_trampolines_unlock ();
1026 mono_create_generic_class_init_trampoline (void)
1028 #ifdef MONO_ARCH_VTABLE_REG
1029 static gpointer code;
1031 mono_trampolines_lock ();
1035 code = mono_aot_get_named_code ("generic_class_init_trampoline");
1037 code = mono_arch_create_generic_class_init_trampoline ();
1040 mono_trampolines_unlock ();
1044 g_assert_not_reached ();
1049 mono_create_jump_trampoline (MonoDomain *domain, MonoMethod *method, gboolean add_sync_wrapper)
1053 guint32 code_size = 0;
1055 code = mono_jit_find_compiled_method_with_jit_info (domain, method, &ji);
1057 * We cannot recover the correct type of a shared generic
1058 * method from its native code address, so we use the
1059 * trampoline instead.
1061 if (code && !ji->has_generic_jit_info)
1064 mono_domain_lock (domain);
1065 code = g_hash_table_lookup (domain_jit_info (domain)->jump_trampoline_hash, method);
1066 mono_domain_unlock (domain);
1070 code = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JUMP, mono_domain_get (), &code_size);
1071 g_assert (code_size);
1073 ji = mono_domain_alloc0 (domain, MONO_SIZEOF_JIT_INFO);
1074 ji->code_start = code;
1075 ji->code_size = code_size;
1076 ji->method = method;
1079 * mono_delegate_ctor needs to find the method metadata from the
1080 * trampoline address, so we save it here.
1083 mono_jit_info_table_add (domain, ji);
1085 mono_domain_lock (domain);
1086 g_hash_table_insert (domain_jit_info (domain)->jump_trampoline_hash, method, ji->code_start);
1087 mono_domain_unlock (domain);
1089 return ji->code_start;
1093 mono_create_jit_trampoline_in_domain (MonoDomain *domain, MonoMethod *method)
1097 if (mono_aot_only) {
1098 /* Avoid creating trampolines if possible */
1099 gpointer code = mono_jit_find_compiled_method (domain, method);
1105 mono_domain_lock (domain);
1106 tramp = g_hash_table_lookup (domain_jit_info (domain)->jit_trampoline_hash, method);
1107 mono_domain_unlock (domain);
1111 tramp = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JIT, domain, NULL);
1113 mono_domain_lock (domain);
1114 g_hash_table_insert (domain_jit_info (domain)->jit_trampoline_hash, method, tramp);
1115 mono_domain_unlock (domain);
1117 mono_jit_stats.method_trampolines++;
1123 mono_create_jit_trampoline (MonoMethod *method)
1125 return mono_create_jit_trampoline_in_domain (mono_domain_get (), method);
1129 mono_create_jit_trampoline_from_token (MonoImage *image, guint32 token)
1133 MonoDomain *domain = mono_domain_get ();
1134 guint8 *buf, *start;
1136 buf = start = mono_domain_code_reserve (domain, 2 * sizeof (gpointer));
1138 *(gpointer*)(gpointer)buf = image;
1139 buf += sizeof (gpointer);
1140 *(guint32*)(gpointer)buf = token;
1142 tramp = mono_create_specific_trampoline (start, MONO_TRAMPOLINE_AOT, domain, NULL);
1144 mono_jit_stats.method_trampolines++;
1150 mono_create_delegate_trampoline (MonoClass *klass)
1152 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1153 MonoDomain *domain = mono_domain_get ();
1155 guint32 code_size = 0;
1156 gpointer *tramp_data;
1159 mono_domain_lock (domain);
1160 ptr = g_hash_table_lookup (domain_jit_info (domain)->delegate_trampoline_hash, klass);
1161 mono_domain_unlock (domain);
1165 // Precompute the delegate invoke impl and pass it to the delegate trampoline
1166 invoke = mono_get_delegate_invoke (klass);
1169 tramp_data = mono_domain_alloc (domain, sizeof (gpointer) * 3);
1170 tramp_data [0] = invoke;
1171 tramp_data [1] = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), TRUE);
1172 tramp_data [2] = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), FALSE);
1174 ptr = mono_create_specific_trampoline (tramp_data, MONO_TRAMPOLINE_DELEGATE, mono_domain_get (), &code_size);
1175 g_assert (code_size);
1177 /* store trampoline address */
1178 mono_domain_lock (domain);
1179 g_hash_table_insert (domain_jit_info (domain)->delegate_trampoline_hash,
1181 mono_domain_unlock (domain);
1190 mono_create_rgctx_lazy_fetch_trampoline (guint32 offset)
1192 static gboolean inited = FALSE;
1193 static int num_trampolines = 0;
1195 gpointer tramp, ptr;
1198 return mono_aot_get_lazy_fetch_trampoline (offset);
1200 mono_trampolines_lock ();
1201 if (rgctx_lazy_fetch_trampoline_hash)
1202 tramp = g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset));
1205 mono_trampolines_unlock ();
1209 tramp = mono_arch_create_rgctx_lazy_fetch_trampoline (offset);
1210 ptr = mono_create_ftnptr (mono_get_root_domain (), tramp);
1212 mono_trampolines_lock ();
1213 if (!rgctx_lazy_fetch_trampoline_hash) {
1214 rgctx_lazy_fetch_trampoline_hash = g_hash_table_new (NULL, NULL);
1215 rgctx_lazy_fetch_trampoline_hash_addr = g_hash_table_new (NULL, NULL);
1217 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset), ptr);
1218 g_assert (offset != -1);
1219 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash_addr, ptr, GUINT_TO_POINTER (offset + 1));
1220 mono_trampolines_unlock ();
1223 mono_counters_register ("RGCTX num lazy fetch trampolines",
1224 MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_trampolines);
1233 mono_create_monitor_enter_trampoline (void)
1235 static gpointer code;
1237 if (mono_aot_only) {
1239 code = mono_aot_get_named_code ("monitor_enter_trampoline");
1243 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
1244 mono_trampolines_lock ();
1247 code = mono_arch_create_monitor_enter_trampoline ();
1249 mono_trampolines_unlock ();
1252 g_assert_not_reached ();
1259 mono_create_monitor_exit_trampoline (void)
1261 static gpointer code;
1263 if (mono_aot_only) {
1265 code = mono_aot_get_named_code ("monitor_exit_trampoline");
1269 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
1270 mono_trampolines_lock ();
1273 code = mono_arch_create_monitor_exit_trampoline ();
1275 mono_trampolines_unlock ();
1278 g_assert_not_reached ();
1283 #ifdef MONO_ARCH_LLVM_SUPPORTED
1285 * mono_create_llvm_vcall_trampoline:
1287 * LLVM emits code for virtual calls which mono_get_vcall_slot is unable to
1288 * decode, i.e. only the final branch address is available:
1289 * mov <offset>(%rax), %rax
1290 * <random code inserted by instruction scheduling>
1293 * To work around this problem, we don't use the common vtable trampoline when
1294 * llvm is enabled. Instead, we use one trampoline per method.
1297 mono_create_llvm_vcall_trampoline (MonoMethod *method)
1302 domain = mono_domain_get ();
1304 mono_domain_lock (domain);
1305 res = g_hash_table_lookup (domain_jit_info (domain)->llvm_vcall_trampoline_hash, method);
1306 mono_domain_unlock (domain);
1310 res = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_LLVM_VCALL, domain, NULL);
1312 mono_domain_lock (domain);
1313 g_hash_table_insert (domain_jit_info (domain)->llvm_vcall_trampoline_hash, method, res);
1314 mono_domain_unlock (domain);
1320 * mono_create_llvm_imt_trampoline:
1322 * LLVM compiled code can't pass in the IMT argument, so we use this trampoline, which
1323 * sets the IMT argument, then branches to the contents of the vtable slot given by
1324 * vt_offset in the vtable which is obtained from the argument list.
1327 mono_create_llvm_imt_trampoline (MonoDomain *domain, MonoMethod *m, int vt_offset)
1329 #ifdef MONO_ARCH_HAVE_LLVM_IMT_TRAMPOLINE
1330 return mono_arch_get_llvm_imt_trampoline (domain, m, vt_offset);
1332 g_assert_not_reached ();
1339 mono_find_class_init_trampoline_by_addr (gconstpointer addr)
1343 mono_trampolines_lock ();
1344 if (class_init_hash_addr)
1345 res = g_hash_table_lookup (class_init_hash_addr, addr);
1348 mono_trampolines_unlock ();
1353 mono_find_rgctx_lazy_fetch_trampoline_by_addr (gconstpointer addr)
1357 mono_trampolines_lock ();
1358 if (rgctx_lazy_fetch_trampoline_hash_addr) {
1359 /* We store the real offset + 1 so we can detect when the lookup fails */
1360 offset = GPOINTER_TO_INT (g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash_addr, addr));
1368 mono_trampolines_unlock ();