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>
10 #include <mono/utils/mono-error-internals.h>
13 #include "debug-mini.h"
16 * Address of the trampoline code. This is used by the debugger to check
17 * whether a method is a trampoline.
19 guint8* mono_trampoline_code [MONO_TRAMPOLINE_NUM];
21 static GHashTable *class_init_hash_addr = NULL;
22 static GHashTable *rgctx_lazy_fetch_trampoline_hash = NULL;
23 static GHashTable *rgctx_lazy_fetch_trampoline_hash_addr = NULL;
24 static guint32 trampoline_calls, jit_trampolines, unbox_trampolines, static_rgctx_trampolines;
26 #define mono_trampolines_lock() EnterCriticalSection (&trampolines_mutex)
27 #define mono_trampolines_unlock() LeaveCriticalSection (&trampolines_mutex)
28 static CRITICAL_SECTION trampolines_mutex;
31 get_unbox_trampoline (MonoMethod *m, gpointer addr, gboolean need_rgctx_tramp)
36 * The unbox trampolines call the method directly, so need to add
37 * an rgctx tramp before them.
39 return mono_create_static_rgctx_trampoline (m, mono_aot_get_unbox_trampoline (m));
41 return mono_aot_get_unbox_trampoline (m);
44 return mono_arch_get_unbox_trampoline (m, addr);
48 #ifdef MONO_ARCH_HAVE_STATIC_RGCTX_TRAMPOLINE
56 rgctx_tramp_info_equal (gconstpointer ka, gconstpointer kb)
58 const RgctxTrampInfo *i1 = ka;
59 const RgctxTrampInfo *i2 = kb;
61 if (i1->m == i2->m && i1->addr == i2->addr)
68 rgctx_tramp_info_hash (gconstpointer data)
70 const RgctxTrampInfo *info = data;
72 return GPOINTER_TO_UINT (info->m) ^ GPOINTER_TO_UINT (info->addr);
76 * mono_create_static_rgctx_trampoline:
78 * Return a static rgctx trampoline for M which branches to ADDR which should
79 * point to the compiled code of M.
81 * Static rgctx trampolines are used when a shared generic method which doesn't
82 * have a this argument is called indirectly, ie. from code which can't pass in
83 * the rgctx argument. The trampoline sets the rgctx argument and jumps to the
84 * methods code. These trampolines are similar to the unbox trampolines, they
85 * perform the same task as the static rgctx wrappers, but they are smaller/faster,
86 * and can be made to work with full AOT.
87 * On PPC addr should be an ftnptr and the return value is an ftnptr too.
90 mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr)
95 RgctxTrampInfo tmp_info;
98 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
99 g_assert (((gpointer*)addr) [2] == 0);
102 if (mini_method_get_context (m)->method_inst)
103 ctx = mono_method_lookup_rgctx (mono_class_vtable (mono_domain_get (), m->klass), mini_method_get_context (m)->method_inst);
105 ctx = mono_class_vtable (mono_domain_get (), m->klass);
107 domain = mono_domain_get ();
110 * In the AOT case, addr might point to either the method, or to an unbox trampoline,
111 * so make the hash keyed on the m+addr pair.
113 mono_domain_lock (domain);
114 if (!domain_jit_info (domain)->static_rgctx_trampoline_hash)
115 domain_jit_info (domain)->static_rgctx_trampoline_hash = g_hash_table_new (rgctx_tramp_info_hash, rgctx_tramp_info_equal);
117 tmp_info.addr = addr;
118 res = g_hash_table_lookup (domain_jit_info (domain)->static_rgctx_trampoline_hash,
120 mono_domain_unlock (domain);
125 res = mono_aot_get_static_rgctx_trampoline (ctx, addr);
127 res = mono_arch_get_static_rgctx_trampoline (m, ctx, addr);
129 mono_domain_lock (domain);
130 /* Duplicates inserted while we didn't hold the lock are OK */
131 info = mono_domain_alloc (domain, sizeof (RgctxTrampInfo));
134 g_hash_table_insert (domain_jit_info (domain)->static_rgctx_trampoline_hash, info, res);
135 mono_domain_unlock (domain);
137 static_rgctx_trampolines ++;
143 mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr)
146 * This shouldn't happen as all arches which support generic sharing support
147 * static rgctx trampolines as well.
149 g_assert_not_reached ();
153 #ifdef MONO_ARCH_HAVE_IMT
156 * Either IMPL_METHOD or AOT_ADDR will be set on return.
159 mono_convert_imt_slot_to_vtable_slot (gpointer* slot, mgreg_t *regs, guint8 *code, MonoMethod *method, MonoMethod **impl_method, gboolean *need_rgctx_tramp, gboolean *variance_used, gpointer *aot_addr)
161 MonoObject *this_argument = mono_arch_get_this_arg_from_call (regs, code);
162 MonoVTable *vt = this_argument->vtable;
163 int displacement = slot - ((gpointer*)vt);
165 if (displacement > 0) {
166 /* slot is in the vtable, not in the IMT */
168 printf ("mono_convert_imt_slot_to_vtable_slot: slot %p is in the vtable, not in the IMT\n", slot);
172 MonoMethod *imt_method = mono_arch_find_imt_method (regs, code);
174 int interface_offset;
175 int imt_slot = MONO_IMT_SIZE + displacement;
177 /*This has to be variance aware since imt_method can be from an interface that vt->klass doesn't directly implement*/
178 interface_offset = mono_class_interface_offset_with_variance (vt->klass, imt_method->klass, variance_used);
180 if (interface_offset < 0) {
181 g_error ("%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));
183 mono_vtable_build_imt_slot (vt, mono_method_get_imt_slot (imt_method));
185 if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) {
186 MonoGenericContext context = { NULL, NULL };
189 * Generic virtual method, imt_method contains the inflated interface
190 * method, need to get the inflated impl method.
192 /* imt_method->slot might not be set */
193 impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_declaring_generic_method (imt_method)->slot);
195 if (impl->klass->generic_class)
196 context.class_inst = impl->klass->generic_class->context.class_inst;
197 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
198 impl = mono_class_inflate_generic_method (impl, &context);
200 /* Avoid loading metadata or creating a generic vtable if possible */
201 if (!vt->klass->valuetype)
202 *aot_addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, interface_offset + mono_method_get_vtable_slot (imt_method));
208 impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_vtable_slot (imt_method));
211 if (impl && mono_method_needs_static_rgctx_invoke (impl, FALSE))
212 *need_rgctx_tramp = TRUE;
216 printf ("mono_convert_imt_slot_to_vtable_slot: method = %s.%s.%s, imt_method = %s.%s.%s\n",
217 method->klass->name_space, method->klass->name, method->name,
218 imt_method->klass->name_space, imt_method->klass->name, imt_method->name);
221 g_assert (imt_slot < MONO_IMT_SIZE);
222 if (vt->imt_collisions_bitmap & (1 << imt_slot)) {
223 int slot = mono_method_get_vtable_index (imt_method);
225 gpointer *vtable_slot;
227 g_assert (slot != -1);
228 vtable_offset = interface_offset + slot;
229 vtable_slot = & (vt->vtable [vtable_offset]);
231 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);
236 printf ("mono_convert_imt_slot_to_vtable_slot: slot %p[%d] is in the IMT, but not colliding\n", slot, imt_slot);
245 * This is a super-ugly hack to fix bug #616463.
247 * The problem is that we don't always set is_generic for generic
248 * method definitions. See the comment at the end of
249 * mono_class_inflate_generic_method_full_checked() in class.c.
252 is_generic_method_definition (MonoMethod *m)
254 MonoGenericContext *context;
260 context = mono_method_get_context (m);
261 if (!context->method_inst)
263 if (context->method_inst == mono_method_get_generic_container (((MonoMethodInflated*)m)->declaring)->context.method_inst)
269 * common_call_trampoline:
271 * The code to handle normal, virtual, and interface method calls and jumps, both
272 * from JITted and LLVM compiled code.
275 common_call_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8* tramp, MonoVTable *vt, gpointer *vtable_slot, gboolean need_rgctx_tramp)
277 gpointer addr, compiled_method;
278 gboolean generic_shared = FALSE;
279 MonoMethod *declaring = NULL;
280 MonoMethod *generic_virtual = NULL, *variant_iface = NULL;
282 gboolean virtual, variance_used = FALSE;
283 gpointer *orig_vtable_slot, *vtable_slot_to_patch = NULL;
284 MonoJitInfo *ji = NULL;
286 virtual = (gpointer)vtable_slot > (gpointer)vt;
288 orig_vtable_slot = vtable_slot;
289 vtable_slot_to_patch = vtable_slot;
291 #ifdef MONO_ARCH_HAVE_IMT
293 if (vt && (gpointer)vtable_slot < (gpointer)vt) {
294 MonoMethod *impl_method = NULL;
295 MonoObject *this_arg;
297 /* we get the interface method because mono_convert_imt_slot_to_vtable_slot ()
298 * needs the signature to be able to find the this argument
300 m = mono_arch_find_imt_method (regs, code);
301 vtable_slot = orig_vtable_slot;
302 g_assert (vtable_slot);
304 this_arg = mono_arch_get_this_arg_from_call (regs, code);
306 if (this_arg->vtable->klass == mono_defaults.transparent_proxy_class) {
307 /* Use the slow path for now */
308 m = mono_object_get_virtual_method (this_arg, m);
309 vtable_slot_to_patch = NULL;
312 vtable_slot = mono_convert_imt_slot_to_vtable_slot (vtable_slot, regs, code, m, &impl_method, &need_rgctx_tramp, &variance_used, &addr);
313 /* This is the vcall slot which gets called through the IMT thunk */
314 vtable_slot_to_patch = vtable_slot;
315 /* mono_convert_imt_slot_to_vtable_slot () also gives us the method that is supposed
316 * to be called, so we compile it and go ahead as usual.
318 /*g_print ("imt found method %p (%s) at %p\n", impl_method, impl_method->name, code);*/
319 if (m->is_inflated && ((MonoMethodInflated*)m)->context.method_inst) {
320 /* Generic virtual method */
322 need_rgctx_tramp = TRUE;
323 } else if (variance_used && mono_class_has_variant_generic_params (m->klass)) {
327 if (addr && !generic_virtual && !variant_iface) {
329 * We found AOT compiled code for the method, skip the rest.
331 if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
334 return mono_create_ftnptr (mono_domain_get (), addr);
343 * The virtual check is needed because is_generic_method_definition (m) could
344 * return TRUE for methods used in IMT calls too.
346 if (virtual && is_generic_method_definition (m)) {
347 MonoGenericContext context = { NULL, NULL };
348 MonoMethod *declaring;
351 declaring = mono_method_get_declaring_generic_method (m);
355 if (m->klass->generic_class)
356 context.class_inst = m->klass->generic_class->context.class_inst;
358 g_assert (!m->klass->generic_container);
360 #ifdef MONO_ARCH_HAVE_IMT
361 generic_virtual = mono_arch_find_imt_method (regs, code);
363 if (generic_virtual) {
364 g_assert (generic_virtual->is_inflated);
365 context.method_inst = ((MonoMethodInflated*)generic_virtual)->context.method_inst;
368 m = mono_class_inflate_generic_method (declaring, &context);
369 /* FIXME: only do this if the method is sharable */
370 need_rgctx_tramp = TRUE;
371 } else if ((context_used = mono_method_check_context_used (m))) {
372 MonoClass *klass = NULL;
373 MonoMethod *actual_method = NULL;
374 MonoVTable *vt = NULL;
375 MonoGenericInst *method_inst = NULL;
378 generic_shared = TRUE;
382 if (m->is_inflated && mono_method_get_context (m)->method_inst) {
383 #ifdef MONO_ARCH_RGCTX_REG
384 MonoMethodRuntimeGenericContext *mrgctx = (MonoMethodRuntimeGenericContext*)mono_arch_find_static_call_vtable (regs, code);
386 klass = mrgctx->class_vtable->klass;
387 method_inst = mrgctx->method_inst;
389 g_assert_not_reached ();
391 } else if ((m->flags & METHOD_ATTRIBUTE_STATIC) || m->klass->valuetype) {
392 #ifdef MONO_ARCH_RGCTX_REG
393 MonoVTable *vtable = mono_arch_find_static_call_vtable (regs, code);
395 klass = vtable->klass;
397 g_assert_not_reached ();
400 #ifdef MONO_ARCH_HAVE_IMT
401 MonoObject *this_argument = mono_arch_get_this_arg_from_call (regs, code);
403 vt = this_argument->vtable;
404 vtable_slot = orig_vtable_slot;
406 g_assert (this_argument->vtable->klass->inited);
407 //mono_class_init (this_argument->vtable->klass);
410 klass = this_argument->vtable->klass->supertypes [m->klass->idepth - 1];
416 g_assert (vtable_slot || klass);
419 int displacement = vtable_slot - ((gpointer*)vt);
421 g_assert_not_reached ();
423 g_assert (displacement > 0);
425 actual_method = vt->klass->vtable [displacement];
429 MonoGenericContext context = { NULL, NULL };
432 declaring = mono_method_get_declaring_generic_method (m);
436 if (klass->generic_class)
437 context.class_inst = klass->generic_class->context.class_inst;
438 else if (klass->generic_container)
439 context.class_inst = klass->generic_container->context.class_inst;
440 context.method_inst = method_inst;
442 actual_method = mono_class_inflate_generic_method (declaring, &context);
444 actual_method = mono_class_get_method_generic (klass, m);
448 g_assert (actual_method);
449 g_assert (actual_method->klass == klass);
451 if (actual_method->is_inflated)
452 declaring = mono_method_get_declaring_generic_method (actual_method);
459 if (m->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) {
463 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
467 /* Avoid recursion */
468 if (!(ji && ji->method->wrapper_type == MONO_WRAPPER_SYNCHRONIZED)) {
469 m = mono_marshal_get_synchronized_wrapper (m);
470 need_rgctx_tramp = FALSE;
474 /* Calls made through delegates on platforms without delegate trampolines */
475 if (!code && mono_method_needs_static_rgctx_invoke (m, FALSE))
476 need_rgctx_tramp = TRUE;
478 addr = compiled_method = mono_compile_method (m);
481 mono_debugger_trampoline_compiled (code, m, addr);
483 if (need_rgctx_tramp)
484 addr = mono_create_static_rgctx_trampoline (m, addr);
486 if (generic_virtual || variant_iface) {
487 MonoMethod *target = generic_virtual ? generic_virtual : variant_iface;
489 vtable_slot = orig_vtable_slot;
490 g_assert (vtable_slot);
492 if (vt->klass->valuetype) /*FIXME is this required variant iface?*/
493 addr = get_unbox_trampoline (m, addr, need_rgctx_tramp);
495 mono_method_add_generic_virtual_invocation (mono_domain_get (),
502 /* the method was jumped to */
504 MonoDomain *domain = mono_domain_get ();
506 /* Patch the got entries pointing to this method */
508 * We do this here instead of in mono_codegen () to cover the case when m
509 * was loaded from an aot image.
511 if (domain_jit_info (domain)->jump_target_got_slot_hash) {
514 mono_domain_lock (domain);
515 list = g_hash_table_lookup (domain_jit_info (domain)->jump_target_got_slot_hash, m);
517 for (tmp = list; tmp; tmp = tmp->next) {
518 gpointer *got_slot = tmp->data;
521 g_hash_table_remove (domain_jit_info (domain)->jump_target_got_slot_hash, m);
524 mono_domain_unlock (domain);
530 vtable_slot = orig_vtable_slot;
533 if (m->klass->valuetype)
534 addr = get_unbox_trampoline (m, addr, need_rgctx_tramp);
536 if (vtable_slot_to_patch && (mono_aot_is_got_entry (code, (guint8*)vtable_slot_to_patch) || mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot_to_patch))) {
537 g_assert (*vtable_slot_to_patch);
538 *vtable_slot_to_patch = mono_get_addr_from_ftnptr (addr);
542 guint8 *plt_entry = mono_aot_get_plt_entry (code);
545 mono_aot_patch_plt_entry (plt_entry, NULL, regs, addr);
547 if (generic_shared) {
548 if (m->wrapper_type != MONO_WRAPPER_NONE)
549 m = mono_marshal_method_from_wrapper (m);
550 g_assert (mono_method_is_generic_sharable_impl (m, FALSE));
553 /* Patch calling code */
555 MonoJitInfo *target_ji =
556 mono_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method));
558 target_ji = mono_jit_info_table_find (mono_get_root_domain (), mono_get_addr_from_ftnptr (compiled_method));
561 ji = mono_jit_info_table_find (mono_domain_get (), (char*)code);
563 ji = mono_jit_info_table_find (mono_get_root_domain (), (char*)code);
565 if (mono_method_same_domain (ji, target_ji))
566 mono_arch_patch_callsite (ji->code_start, code, addr);
575 * mono_magic_trampoline:
577 * This trampoline handles normal calls from JITted code.
580 mono_magic_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp)
584 return common_call_trampoline (regs, code, arg, tramp, NULL, NULL, FALSE);
588 * mono_vcall_trampoline:
590 * This trampoline handles virtual calls.
593 mono_vcall_trampoline (mgreg_t *regs, guint8 *code, int slot, guint8 *tramp)
597 gpointer *vtable_slot;
599 gboolean need_rgctx_tramp = FALSE;
605 * We need to obtain the following pieces of information:
606 * - the method which needs to be compiled.
608 * We use one vtable trampoline per vtable slot index, so we need only the vtable,
609 * the other two can be computed from the vtable + the slot index.
611 #ifndef MONO_ARCH_THIS_AS_FIRST_ARG
612 /* All architectures should support this */
613 g_assert_not_reached ();
617 * Obtain the vtable from the 'this' arg.
619 this = mono_arch_get_this_arg_from_call (regs, code);
625 /* Normal virtual call */
626 vtable_slot = &(vt->vtable [slot]);
628 /* Avoid loading metadata or creating a generic vtable if possible */
629 addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, slot);
630 if (addr && !vt->klass->valuetype) {
631 if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
634 return mono_create_ftnptr (mono_domain_get (), addr);
639 * is_generic_method_definition() above) also
640 * goes away if we do a
641 * mono_class_setup_vtable (vt->klass) here,
642 * because we then inflate the method
643 * correctly, put it in the cache, and the
644 * "wrong" inflation invocation still looks up
645 * the correctly inflated method.
647 * The hack above seems more stable and
650 m = mono_class_get_vtable_entry (vt->klass, slot);
652 need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (m, 0);
655 vtable_slot = &(((gpointer*)vt) [slot]);
658 need_rgctx_tramp = FALSE;
661 return common_call_trampoline (regs, code, m, tramp, vt, vtable_slot, need_rgctx_tramp);
665 mono_generic_virtual_remoting_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8 *tramp)
667 MonoGenericContext context = { NULL, NULL };
668 MonoMethod *imt_method, *declaring;
673 g_assert (m->is_generic);
676 declaring = mono_method_get_declaring_generic_method (m);
680 if (m->klass->generic_class)
681 context.class_inst = m->klass->generic_class->context.class_inst;
683 g_assert (!m->klass->generic_container);
685 #ifdef MONO_ARCH_HAVE_IMT
686 imt_method = mono_arch_find_imt_method (regs, code);
687 if (imt_method->is_inflated)
688 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
690 m = mono_class_inflate_generic_method (declaring, &context);
691 m = mono_marshal_get_remoting_invoke_with_check (m);
693 addr = mono_compile_method (m);
696 mono_debugger_trampoline_compiled (NULL, m, addr);
702 * mono_aot_trampoline:
704 * This trampoline handles calls made from AOT code. We try to bypass the
705 * normal JIT compilation logic to avoid loading the metadata for the method.
707 #ifdef MONO_ARCH_AOT_SUPPORTED
709 mono_aot_trampoline (mgreg_t *regs, guint8 *code, guint8 *token_info,
714 MonoMethod *method = NULL;
720 image = *(gpointer*)(gpointer)token_info;
721 token_info += sizeof (gpointer);
722 token = *(guint32*)(gpointer)token_info;
724 addr = mono_aot_get_method_from_token (mono_domain_get (), image, token);
726 method = mono_get_method (image, token, NULL);
729 /* Use the generic code */
730 return mono_magic_trampoline (regs, code, method, tramp);
733 addr = mono_create_ftnptr (mono_domain_get (), addr);
735 /* This is a normal call through a PLT entry */
736 plt_entry = mono_aot_get_plt_entry (code);
737 g_assert (plt_entry);
739 mono_aot_patch_plt_entry (plt_entry, NULL, regs, addr);
745 * mono_aot_plt_trampoline:
747 * This trampoline handles calls made from AOT code through the PLT table.
750 mono_aot_plt_trampoline (mgreg_t *regs, guint8 *code, guint8 *aot_module,
753 guint32 plt_info_offset = mono_aot_get_plt_info_offset (regs, code);
758 res = mono_aot_plt_resolve (aot_module, plt_info_offset, code);
760 if (mono_loader_get_last_error ())
761 mono_raise_exception (mono_loader_error_prepare_exception (mono_loader_get_last_error ()));
762 // FIXME: Error handling (how ?)
771 * mono_class_init_trampoline:
773 * This method calls mono_runtime_class_init () to run the static constructor
774 * for the type, then patches the caller code so it is not called again.
777 mono_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp)
779 guint8 *plt_entry = mono_aot_get_plt_entry (code);
783 mono_runtime_class_init (vtable);
786 mono_arch_nullify_plt_entry (plt_entry, regs);
788 mono_arch_nullify_class_init_trampoline (code, regs);
793 * mono_generic_class_init_trampoline:
795 * This method calls mono_runtime_class_init () to run the static constructor
799 mono_generic_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp)
803 mono_runtime_class_init (vtable);
807 mono_rgctx_lazy_fetch_trampoline (mgreg_t *regs, guint8 *code, gpointer data, guint8 *tramp)
809 #ifdef MONO_ARCH_VTABLE_REG
810 static gboolean inited = FALSE;
811 static int num_lookups = 0;
812 guint32 slot = GPOINTER_TO_UINT (data);
813 mgreg_t *r = (mgreg_t*)regs;
814 gpointer arg = (gpointer)(gssize)r [MONO_ARCH_VTABLE_REG];
815 guint32 index = MONO_RGCTX_SLOT_INDEX (slot);
816 gboolean mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
821 mono_counters_register ("RGCTX unmanaged lookups", MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_lookups);
828 return mono_method_fill_runtime_generic_context (arg, index);
830 return mono_class_fill_runtime_generic_context (arg, index);
832 g_assert_not_reached ();
837 mono_monitor_enter_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
839 mono_monitor_enter (obj);
843 mono_monitor_exit_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
845 mono_monitor_exit (obj);
848 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
851 * mono_delegate_trampoline:
853 * This trampoline handles calls made to Delegate:Invoke ().
854 * This is called once the first time a delegate is invoked, so it must be fast.
857 mono_delegate_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp)
859 MonoDomain *domain = mono_domain_get ();
860 MonoDelegate *delegate;
863 MonoMethod *method = NULL;
864 gboolean multicast, callvirt = FALSE;
865 gboolean need_rgctx_tramp = FALSE;
866 gboolean enable_caching = TRUE;
867 MonoMethod *invoke = tramp_data [0];
868 guint8 *impl_this = tramp_data [1];
869 guint8 *impl_nothis = tramp_data [2];
871 MonoMethodSignature *sig;
875 /* Obtain the delegate object according to the calling convention */
876 delegate = mono_arch_get_this_arg_from_call (regs, code);
878 if (delegate->method) {
879 method = delegate->method;
882 * delegate->method_ptr == NULL means the delegate was initialized by
883 * mini_delegate_ctor, while != NULL means it is initialized by
884 * mono_delegate_ctor_with_method (). In both cases, we need to add wrappers
885 * (ctor_with_method () does this, but it doesn't store the wrapper back into
888 if (delegate->target && delegate->target->vtable->klass == mono_defaults.transparent_proxy_class) {
890 if (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class != mono_defaults.com_object_class &&
891 !((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class->is_com_object)
893 method = mono_marshal_get_remoting_invoke (method);
896 mono_error_init (&err);
897 sig = mono_method_signature_checked (method, &err);
899 mono_error_raise_exception (&err);
901 if (sig->hasthis && method->klass->valuetype)
902 method = mono_marshal_get_unbox_wrapper (method);
905 ji = mono_jit_info_table_find (domain, mono_get_addr_from_ftnptr (delegate->method_ptr));
911 mono_error_init (&err);
912 sig = mono_method_signature_checked (method, &err);
914 mono_error_raise_exception (&err);
916 callvirt = !delegate->target && sig->hasthis;
917 if (delegate->target &&
918 method->flags & METHOD_ATTRIBUTE_VIRTUAL &&
919 method->flags & METHOD_ATTRIBUTE_ABSTRACT &&
920 method->klass->flags & TYPE_ATTRIBUTE_ABSTRACT) {
921 method = mono_object_get_virtual_method (delegate->target, method);
922 enable_caching = FALSE;
926 if (method && method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
927 method = mono_marshal_get_synchronized_wrapper (method);
929 if (method && mono_method_needs_static_rgctx_invoke (method, FALSE))
930 need_rgctx_tramp = TRUE;
933 * If the called address is a trampoline, replace it with the compiled method so
934 * further calls don't have to go through the trampoline.
936 if (method && !callvirt) {
937 /* Avoid the overhead of looking up an already compiled method if possible */
938 if (enable_caching && delegate->method_code && *delegate->method_code) {
939 delegate->method_ptr = *delegate->method_code;
941 delegate->method_ptr = mono_compile_method (method);
942 if (need_rgctx_tramp)
943 delegate->method_ptr = mono_create_static_rgctx_trampoline (method, delegate->method_ptr);
944 if (enable_caching && delegate->method_code)
945 *delegate->method_code = delegate->method_ptr;
946 mono_debugger_trampoline_compiled (NULL, method, delegate->method_ptr);
949 if (need_rgctx_tramp)
950 delegate->method_ptr = mono_create_static_rgctx_trampoline (method, delegate->method_ptr);
953 multicast = ((MonoMulticastDelegate*)delegate)->prev != NULL;
954 if (!multicast && !callvirt) {
955 if (method && (method->flags & METHOD_ATTRIBUTE_STATIC) && mono_method_signature (method)->param_count == mono_method_signature (invoke)->param_count + 1)
956 /* Closed static delegate */
959 code = delegate->target ? impl_this : impl_nothis;
962 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
967 /* The general, unoptimized case */
968 m = mono_marshal_get_delegate_invoke (invoke, delegate);
969 code = mono_compile_method (m);
970 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
971 mono_debugger_trampoline_compiled (NULL, m, delegate->invoke_impl);
978 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
980 mono_handler_block_guard_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp)
984 MonoJitTlsData *jit_tls = TlsGetValue (mono_jit_tls_id);
985 gpointer resume_ip = jit_tls->handler_block_return_address;
987 memcpy (&ctx, &jit_tls->handler_block_context, sizeof (MonoContext));
988 MONO_CONTEXT_SET_IP (&ctx, jit_tls->handler_block_return_address);
990 jit_tls->handler_block_return_address = NULL;
991 jit_tls->handler_block = NULL;
993 if (!resume_ip) /*this should not happen, but we should avoid crashing */
994 exc = mono_get_exception_execution_engine ("Invalid internal state, resuming abort after handler block but no resume ip found");
996 exc = mono_thread_resume_interruption ();
999 static void (*restore_context) (MonoContext *);
1001 if (!restore_context)
1002 restore_context = mono_get_restore_context ();
1004 mono_handle_exception (&ctx, exc, NULL, FALSE);
1005 restore_context (&ctx);
1012 mono_create_handler_block_trampoline (void)
1014 static gpointer code;
1016 if (mono_aot_only) {
1021 mono_trampolines_lock ();
1024 code = mono_arch_create_handler_block_trampoline ();
1026 mono_trampolines_unlock ();
1033 * mono_get_trampoline_func:
1035 * Return the C function which needs to be called by the generic trampoline of type
1039 mono_get_trampoline_func (MonoTrampolineType tramp_type)
1041 switch (tramp_type) {
1042 case MONO_TRAMPOLINE_JIT:
1043 case MONO_TRAMPOLINE_JUMP:
1044 return mono_magic_trampoline;
1045 case MONO_TRAMPOLINE_CLASS_INIT:
1046 return mono_class_init_trampoline;
1047 case MONO_TRAMPOLINE_GENERIC_CLASS_INIT:
1048 return mono_generic_class_init_trampoline;
1049 case MONO_TRAMPOLINE_RGCTX_LAZY_FETCH:
1050 return mono_rgctx_lazy_fetch_trampoline;
1051 #ifdef MONO_ARCH_AOT_SUPPORTED
1052 case MONO_TRAMPOLINE_AOT:
1053 return mono_aot_trampoline;
1054 case MONO_TRAMPOLINE_AOT_PLT:
1055 return mono_aot_plt_trampoline;
1057 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1058 case MONO_TRAMPOLINE_DELEGATE:
1059 return mono_delegate_trampoline;
1061 case MONO_TRAMPOLINE_RESTORE_STACK_PROT:
1062 return mono_altstack_restore_prot;
1063 case MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING:
1064 return mono_generic_virtual_remoting_trampoline;
1065 case MONO_TRAMPOLINE_MONITOR_ENTER:
1066 return mono_monitor_enter_trampoline;
1067 case MONO_TRAMPOLINE_MONITOR_EXIT:
1068 return mono_monitor_exit_trampoline;
1069 case MONO_TRAMPOLINE_VCALL:
1070 return mono_vcall_trampoline;
1071 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1072 case MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD:
1073 return mono_handler_block_guard_trampoline;
1076 g_assert_not_reached ();
1082 create_trampoline_code (MonoTrampolineType tramp_type)
1084 MonoTrampInfo *info;
1087 code = mono_arch_create_generic_trampoline (tramp_type, &info, FALSE);
1089 mono_save_trampoline_xdebug_info (info);
1090 if (mono_jit_map_is_enabled ())
1091 mono_emit_jit_tramp (info->code, info->code_size, info->name);
1092 mono_tramp_info_free (info);
1099 mono_trampolines_init (void)
1101 InitializeCriticalSection (&trampolines_mutex);
1106 mono_trampoline_code [MONO_TRAMPOLINE_JIT] = create_trampoline_code (MONO_TRAMPOLINE_JIT);
1107 mono_trampoline_code [MONO_TRAMPOLINE_JUMP] = create_trampoline_code (MONO_TRAMPOLINE_JUMP);
1108 mono_trampoline_code [MONO_TRAMPOLINE_CLASS_INIT] = create_trampoline_code (MONO_TRAMPOLINE_CLASS_INIT);
1109 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_CLASS_INIT] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_CLASS_INIT);
1110 mono_trampoline_code [MONO_TRAMPOLINE_RGCTX_LAZY_FETCH] = create_trampoline_code (MONO_TRAMPOLINE_RGCTX_LAZY_FETCH);
1111 #ifdef MONO_ARCH_AOT_SUPPORTED
1112 mono_trampoline_code [MONO_TRAMPOLINE_AOT] = create_trampoline_code (MONO_TRAMPOLINE_AOT);
1113 mono_trampoline_code [MONO_TRAMPOLINE_AOT_PLT] = create_trampoline_code (MONO_TRAMPOLINE_AOT_PLT);
1115 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1116 mono_trampoline_code [MONO_TRAMPOLINE_DELEGATE] = create_trampoline_code (MONO_TRAMPOLINE_DELEGATE);
1118 mono_trampoline_code [MONO_TRAMPOLINE_RESTORE_STACK_PROT] = create_trampoline_code (MONO_TRAMPOLINE_RESTORE_STACK_PROT);
1119 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING);
1120 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_ENTER] = create_trampoline_code (MONO_TRAMPOLINE_MONITOR_ENTER);
1121 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_EXIT] = create_trampoline_code (MONO_TRAMPOLINE_MONITOR_EXIT);
1122 mono_trampoline_code [MONO_TRAMPOLINE_VCALL] = create_trampoline_code (MONO_TRAMPOLINE_VCALL);
1123 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1124 mono_trampoline_code [MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD] = create_trampoline_code (MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD);
1125 mono_create_handler_block_trampoline ();
1128 mono_counters_register ("Calls to trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &trampoline_calls);
1129 mono_counters_register ("JIT trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &jit_trampolines);
1130 mono_counters_register ("Unbox trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &unbox_trampolines);
1131 mono_counters_register ("Static rgctx trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &static_rgctx_trampolines);
1135 mono_trampolines_cleanup (void)
1137 if (class_init_hash_addr)
1138 g_hash_table_destroy (class_init_hash_addr);
1139 if (rgctx_lazy_fetch_trampoline_hash)
1140 g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash);
1141 if (rgctx_lazy_fetch_trampoline_hash_addr)
1142 g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash_addr);
1144 DeleteCriticalSection (&trampolines_mutex);
1148 mono_get_trampoline_code (MonoTrampolineType tramp_type)
1150 g_assert (mono_trampoline_code [tramp_type]);
1152 return mono_trampoline_code [tramp_type];
1156 mono_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
1159 return mono_aot_create_specific_trampoline (mono_defaults.corlib, arg1, tramp_type, domain, code_len);
1161 return mono_arch_create_specific_trampoline (arg1, tramp_type, domain, code_len);
1165 mono_create_class_init_trampoline (MonoVTable *vtable)
1168 MonoDomain *domain = vtable->domain;
1170 g_assert (!vtable->klass->generic_container);
1172 /* previously created trampoline code */
1173 mono_domain_lock (domain);
1175 g_hash_table_lookup (domain_jit_info (domain)->class_init_trampoline_hash,
1177 mono_domain_unlock (domain);
1181 code = mono_create_specific_trampoline (vtable, MONO_TRAMPOLINE_CLASS_INIT, domain, NULL);
1183 ptr = mono_create_ftnptr (domain, code);
1185 /* store trampoline address */
1186 mono_domain_lock (domain);
1187 g_hash_table_insert (domain_jit_info (domain)->class_init_trampoline_hash,
1189 mono_domain_unlock (domain);
1191 mono_trampolines_lock ();
1192 if (!class_init_hash_addr)
1193 class_init_hash_addr = g_hash_table_new (NULL, NULL);
1194 g_hash_table_insert (class_init_hash_addr, ptr, vtable);
1195 mono_trampolines_unlock ();
1201 mono_create_generic_class_init_trampoline (void)
1203 #ifdef MONO_ARCH_VTABLE_REG
1204 static gpointer code;
1205 MonoTrampInfo *info;
1207 mono_trampolines_lock ();
1211 /* get_named_code () might return an ftnptr, but our caller expects a direct pointer */
1212 code = mono_get_addr_from_ftnptr (mono_aot_get_trampoline ("generic_class_init_trampoline"));
1214 code = mono_arch_create_generic_class_init_trampoline (&info, FALSE);
1217 mono_save_trampoline_xdebug_info (info);
1218 if (mono_jit_map_is_enabled ())
1219 mono_emit_jit_tramp (info->code, info->code_size, info->name);
1220 mono_tramp_info_free (info);
1225 mono_trampolines_unlock ();
1229 g_assert_not_reached ();
1234 mono_create_jump_trampoline (MonoDomain *domain, MonoMethod *method, gboolean add_sync_wrapper)
1238 guint32 code_size = 0;
1240 code = mono_jit_find_compiled_method_with_jit_info (domain, method, &ji);
1242 * We cannot recover the correct type of a shared generic
1243 * method from its native code address, so we use the
1244 * trampoline instead.
1246 if (code && !ji->has_generic_jit_info)
1249 mono_domain_lock (domain);
1250 code = g_hash_table_lookup (domain_jit_info (domain)->jump_trampoline_hash, method);
1251 mono_domain_unlock (domain);
1255 code = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JUMP, mono_domain_get (), &code_size);
1256 g_assert (code_size);
1258 ji = mono_domain_alloc0 (domain, MONO_SIZEOF_JIT_INFO);
1259 ji->code_start = code;
1260 ji->code_size = code_size;
1261 ji->method = method;
1264 * mono_delegate_ctor needs to find the method metadata from the
1265 * trampoline address, so we save it here.
1268 mono_jit_info_table_add (domain, ji);
1270 mono_domain_lock (domain);
1271 g_hash_table_insert (domain_jit_info (domain)->jump_trampoline_hash, method, ji->code_start);
1272 mono_domain_unlock (domain);
1274 return ji->code_start;
1278 mono_create_jit_trampoline_in_domain (MonoDomain *domain, MonoMethod *method)
1282 if (mono_aot_only) {
1283 /* Avoid creating trampolines if possible */
1284 gpointer code = mono_jit_find_compiled_method (domain, method);
1290 mono_domain_lock (domain);
1291 tramp = g_hash_table_lookup (domain_jit_info (domain)->jit_trampoline_hash, method);
1292 mono_domain_unlock (domain);
1296 tramp = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JIT, domain, NULL);
1298 mono_domain_lock (domain);
1299 g_hash_table_insert (domain_jit_info (domain)->jit_trampoline_hash, method, tramp);
1300 mono_domain_unlock (domain);
1308 mono_create_jit_trampoline (MonoMethod *method)
1310 return mono_create_jit_trampoline_in_domain (mono_domain_get (), method);
1314 mono_create_jit_trampoline_from_token (MonoImage *image, guint32 token)
1318 MonoDomain *domain = mono_domain_get ();
1319 guint8 *buf, *start;
1321 buf = start = mono_domain_code_reserve (domain, 2 * sizeof (gpointer));
1323 *(gpointer*)(gpointer)buf = image;
1324 buf += sizeof (gpointer);
1325 *(guint32*)(gpointer)buf = token;
1327 tramp = mono_create_specific_trampoline (start, MONO_TRAMPOLINE_AOT, domain, NULL);
1335 mono_create_delegate_trampoline (MonoClass *klass)
1337 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1338 MonoDomain *domain = mono_domain_get ();
1340 guint32 code_size = 0;
1341 gpointer *tramp_data;
1344 mono_domain_lock (domain);
1345 ptr = g_hash_table_lookup (domain_jit_info (domain)->delegate_trampoline_hash, klass);
1346 mono_domain_unlock (domain);
1350 // Precompute the delegate invoke impl and pass it to the delegate trampoline
1351 invoke = mono_get_delegate_invoke (klass);
1354 tramp_data = mono_domain_alloc (domain, sizeof (gpointer) * 3);
1355 tramp_data [0] = invoke;
1356 tramp_data [1] = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), TRUE);
1357 tramp_data [2] = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), FALSE);
1359 ptr = mono_create_specific_trampoline (tramp_data, MONO_TRAMPOLINE_DELEGATE, mono_domain_get (), &code_size);
1360 g_assert (code_size);
1362 /* store trampoline address */
1363 mono_domain_lock (domain);
1364 g_hash_table_insert (domain_jit_info (domain)->delegate_trampoline_hash,
1366 mono_domain_unlock (domain);
1375 mono_create_rgctx_lazy_fetch_trampoline (guint32 offset)
1377 static gboolean inited = FALSE;
1378 static int num_trampolines = 0;
1379 MonoTrampInfo *info;
1381 gpointer tramp, ptr;
1384 return mono_aot_get_lazy_fetch_trampoline (offset);
1386 mono_trampolines_lock ();
1387 if (rgctx_lazy_fetch_trampoline_hash)
1388 tramp = g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset));
1391 mono_trampolines_unlock ();
1395 tramp = mono_arch_create_rgctx_lazy_fetch_trampoline (offset, &info, FALSE);
1397 mono_save_trampoline_xdebug_info (info);
1398 if (mono_jit_map_is_enabled ())
1399 mono_emit_jit_tramp (info->code, info->code_size, info->name);
1400 mono_tramp_info_free (info);
1402 ptr = mono_create_ftnptr (mono_get_root_domain (), tramp);
1404 mono_trampolines_lock ();
1405 if (!rgctx_lazy_fetch_trampoline_hash) {
1406 rgctx_lazy_fetch_trampoline_hash = g_hash_table_new (NULL, NULL);
1407 rgctx_lazy_fetch_trampoline_hash_addr = g_hash_table_new (NULL, NULL);
1409 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset), ptr);
1410 g_assert (offset != -1);
1411 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash_addr, ptr, GUINT_TO_POINTER (offset + 1));
1412 mono_trampolines_unlock ();
1415 mono_counters_register ("RGCTX num lazy fetch trampolines",
1416 MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_trampolines);
1425 mono_create_monitor_enter_trampoline (void)
1427 static gpointer code;
1428 MonoTrampInfo *info;
1430 if (mono_aot_only) {
1432 code = mono_aot_get_trampoline ("monitor_enter_trampoline");
1436 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
1437 mono_trampolines_lock ();
1440 code = mono_arch_create_monitor_enter_trampoline (&info, FALSE);
1442 mono_save_trampoline_xdebug_info (info);
1443 if (mono_jit_map_is_enabled ())
1444 mono_emit_jit_tramp (info->code, info->code_size, info->name);
1445 mono_tramp_info_free (info);
1449 mono_trampolines_unlock ();
1452 g_assert_not_reached ();
1459 mono_create_monitor_exit_trampoline (void)
1461 static gpointer code;
1462 MonoTrampInfo *info;
1464 if (mono_aot_only) {
1466 code = mono_aot_get_trampoline ("monitor_exit_trampoline");
1470 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
1471 mono_trampolines_lock ();
1474 code = mono_arch_create_monitor_exit_trampoline (&info, FALSE);
1476 mono_save_trampoline_xdebug_info (info);
1477 if (mono_jit_map_is_enabled ())
1478 mono_emit_jit_tramp (info->code, info->code_size, info->name);
1479 mono_tramp_info_free (info);
1483 mono_trampolines_unlock ();
1486 g_assert_not_reached ();
1491 #ifdef MONO_ARCH_LLVM_SUPPORTED
1493 * mono_create_llvm_imt_trampoline:
1495 * LLVM compiled code can't pass in the IMT argument, so we use this trampoline, which
1496 * sets the IMT argument, then branches to the contents of the vtable slot given by
1497 * vt_offset in the vtable which is obtained from the argument list.
1500 mono_create_llvm_imt_trampoline (MonoDomain *domain, MonoMethod *m, int vt_offset)
1502 #ifdef MONO_ARCH_HAVE_LLVM_IMT_TRAMPOLINE
1503 return mono_arch_get_llvm_imt_trampoline (domain, m, vt_offset);
1505 g_assert_not_reached ();
1512 mono_find_class_init_trampoline_by_addr (gconstpointer addr)
1516 mono_trampolines_lock ();
1517 if (class_init_hash_addr)
1518 res = g_hash_table_lookup (class_init_hash_addr, addr);
1521 mono_trampolines_unlock ();
1526 mono_find_rgctx_lazy_fetch_trampoline_by_addr (gconstpointer addr)
1530 mono_trampolines_lock ();
1531 if (rgctx_lazy_fetch_trampoline_hash_addr) {
1532 /* We store the real offset + 1 so we can detect when the lookup fails */
1533 offset = GPOINTER_TO_INT (g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash_addr, addr));
1541 mono_trampolines_unlock ();
1545 static const char*tramp_names [MONO_TRAMPOLINE_NUM] = {
1549 "generic_class_init",
1554 "restore_stack_prot",
1555 "generic_virtual_remoting",
1559 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1560 "handler_block_guard"
1565 * mono_get_generic_trampoline_name:
1567 * Returns a pointer to malloc-ed memory.
1570 mono_get_generic_trampoline_name (MonoTrampolineType tramp_type)
1572 return g_strdup_printf ("generic_trampoline_%s", tramp_names [tramp_type]);
1576 * mono_get_rgctx_fetch_trampoline_name:
1578 * Returns a pointer to malloc-ed memory.
1581 mono_get_rgctx_fetch_trampoline_name (int slot)
1586 mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
1587 index = MONO_RGCTX_SLOT_INDEX (slot);
1589 return g_strdup_printf ("rgctx_fetch_trampoline_%s_%d", mrgctx ? "mrgctx" : "rgctx", index);