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, proxy = FALSE, 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 */
309 m = mono_object_get_virtual_method (this_arg, m);
310 vtable_slot_to_patch = NULL;
313 vtable_slot = mono_convert_imt_slot_to_vtable_slot (vtable_slot, regs, code, m, &impl_method, &need_rgctx_tramp, &variance_used, &addr);
314 /* This is the vcall slot which gets called through the IMT thunk */
315 vtable_slot_to_patch = vtable_slot;
316 /* mono_convert_imt_slot_to_vtable_slot () also gives us the method that is supposed
317 * to be called, so we compile it and go ahead as usual.
319 /*g_print ("imt found method %p (%s) at %p\n", impl_method, impl_method->name, code);*/
320 if (m->is_inflated && ((MonoMethodInflated*)m)->context.method_inst) {
321 /* Generic virtual method */
323 need_rgctx_tramp = TRUE;
324 } else if (variance_used && mono_class_has_variant_generic_params (m->klass)) {
328 if (addr && !generic_virtual && !variant_iface) {
330 * We found AOT compiled code for the method, skip the rest.
332 if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
335 return mono_create_ftnptr (mono_domain_get (), addr);
344 * The virtual check is needed because is_generic_method_definition (m) could
345 * return TRUE for methods used in IMT calls too.
347 if (virtual && is_generic_method_definition (m)) {
348 MonoGenericContext context = { NULL, NULL };
349 MonoMethod *declaring;
352 declaring = mono_method_get_declaring_generic_method (m);
356 if (m->klass->generic_class)
357 context.class_inst = m->klass->generic_class->context.class_inst;
359 g_assert (!m->klass->generic_container);
361 #ifdef MONO_ARCH_HAVE_IMT
362 generic_virtual = mono_arch_find_imt_method (regs, code);
364 if (generic_virtual) {
365 g_assert (generic_virtual->is_inflated);
366 context.method_inst = ((MonoMethodInflated*)generic_virtual)->context.method_inst;
369 m = mono_class_inflate_generic_method (declaring, &context);
370 /* FIXME: only do this if the method is sharable */
371 need_rgctx_tramp = TRUE;
372 } else if ((context_used = mono_method_check_context_used (m))) {
373 MonoClass *klass = NULL;
374 MonoMethod *actual_method = NULL;
375 MonoVTable *vt = NULL;
376 MonoGenericInst *method_inst = NULL;
379 generic_shared = TRUE;
383 if (m->is_inflated && mono_method_get_context (m)->method_inst) {
384 #ifdef MONO_ARCH_RGCTX_REG
385 MonoMethodRuntimeGenericContext *mrgctx = (MonoMethodRuntimeGenericContext*)mono_arch_find_static_call_vtable (regs, code);
387 klass = mrgctx->class_vtable->klass;
388 method_inst = mrgctx->method_inst;
390 g_assert_not_reached ();
392 } else if ((m->flags & METHOD_ATTRIBUTE_STATIC) || m->klass->valuetype) {
393 #ifdef MONO_ARCH_RGCTX_REG
394 MonoVTable *vtable = mono_arch_find_static_call_vtable (regs, code);
396 klass = vtable->klass;
398 g_assert_not_reached ();
401 #ifdef MONO_ARCH_HAVE_IMT
402 MonoObject *this_argument = mono_arch_get_this_arg_from_call (regs, code);
404 vt = this_argument->vtable;
405 vtable_slot = orig_vtable_slot;
407 g_assert (this_argument->vtable->klass->inited);
408 //mono_class_init (this_argument->vtable->klass);
411 klass = this_argument->vtable->klass->supertypes [m->klass->idepth - 1];
417 g_assert (vtable_slot || klass);
420 int displacement = vtable_slot - ((gpointer*)vt);
422 g_assert_not_reached ();
424 g_assert (displacement > 0);
426 actual_method = vt->klass->vtable [displacement];
430 MonoGenericContext context = { NULL, NULL };
433 declaring = mono_method_get_declaring_generic_method (m);
437 if (klass->generic_class)
438 context.class_inst = klass->generic_class->context.class_inst;
439 else if (klass->generic_container)
440 context.class_inst = klass->generic_container->context.class_inst;
441 context.method_inst = method_inst;
443 actual_method = mono_class_inflate_generic_method (declaring, &context);
445 actual_method = mono_class_get_method_generic (klass, m);
449 g_assert (actual_method);
450 g_assert (actual_method->klass == klass);
452 if (actual_method->is_inflated)
453 declaring = mono_method_get_declaring_generic_method (actual_method);
460 if (m->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) {
464 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
468 /* Avoid recursion */
469 if (!(ji && ji->method->wrapper_type == MONO_WRAPPER_SYNCHRONIZED)) {
470 m = mono_marshal_get_synchronized_wrapper (m);
471 need_rgctx_tramp = FALSE;
475 /* Calls made through delegates on platforms without delegate trampolines */
476 if (!code && mono_method_needs_static_rgctx_invoke (m, FALSE))
477 need_rgctx_tramp = TRUE;
479 addr = compiled_method = mono_compile_method (m);
482 mono_debugger_trampoline_compiled (code, m, addr);
484 if (need_rgctx_tramp)
485 addr = mono_create_static_rgctx_trampoline (m, addr);
487 if (generic_virtual || variant_iface) {
488 MonoMethod *target = generic_virtual ? generic_virtual : variant_iface;
490 vtable_slot = orig_vtable_slot;
491 g_assert (vtable_slot);
493 if (vt->klass->valuetype) /*FIXME is this required variant iface?*/
494 addr = get_unbox_trampoline (m, addr, need_rgctx_tramp);
496 mono_method_add_generic_virtual_invocation (mono_domain_get (),
503 /* the method was jumped to */
505 MonoDomain *domain = mono_domain_get ();
507 /* Patch the got entries pointing to this method */
509 * We do this here instead of in mono_codegen () to cover the case when m
510 * was loaded from an aot image.
512 if (domain_jit_info (domain)->jump_target_got_slot_hash) {
515 mono_domain_lock (domain);
516 list = g_hash_table_lookup (domain_jit_info (domain)->jump_target_got_slot_hash, m);
518 for (tmp = list; tmp; tmp = tmp->next) {
519 gpointer *got_slot = tmp->data;
522 g_hash_table_remove (domain_jit_info (domain)->jump_target_got_slot_hash, m);
525 mono_domain_unlock (domain);
531 vtable_slot = orig_vtable_slot;
534 if (m->klass->valuetype)
535 addr = get_unbox_trampoline (m, addr, need_rgctx_tramp);
537 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))) {
538 g_assert (*vtable_slot_to_patch);
539 *vtable_slot_to_patch = mono_get_addr_from_ftnptr (addr);
543 guint8 *plt_entry = mono_aot_get_plt_entry (code);
546 mono_aot_patch_plt_entry (plt_entry, NULL, regs, addr);
548 if (generic_shared) {
549 if (m->wrapper_type != MONO_WRAPPER_NONE)
550 m = mono_marshal_method_from_wrapper (m);
551 g_assert (mono_method_is_generic_sharable_impl (m, FALSE));
554 /* Patch calling code */
556 MonoJitInfo *target_ji =
557 mono_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method));
559 target_ji = mono_jit_info_table_find (mono_get_root_domain (), mono_get_addr_from_ftnptr (compiled_method));
562 ji = mono_jit_info_table_find (mono_domain_get (), (char*)code);
564 ji = mono_jit_info_table_find (mono_get_root_domain (), (char*)code);
566 if (mono_method_same_domain (ji, target_ji))
567 mono_arch_patch_callsite (ji->code_start, code, addr);
576 * mono_magic_trampoline:
578 * This trampoline handles normal calls from JITted code.
581 mono_magic_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp)
585 return common_call_trampoline (regs, code, arg, tramp, NULL, NULL, FALSE);
589 * mono_vcall_trampoline:
591 * This trampoline handles virtual calls.
594 mono_vcall_trampoline (mgreg_t *regs, guint8 *code, int slot, guint8 *tramp)
598 gpointer *vtable_slot;
600 gboolean need_rgctx_tramp = FALSE;
606 * We need to obtain the following pieces of information:
607 * - the method which needs to be compiled.
609 * We use one vtable trampoline per vtable slot index, so we need only the vtable,
610 * the other two can be computed from the vtable + the slot index.
612 #ifndef MONO_ARCH_THIS_AS_FIRST_ARG
613 /* All architectures should support this */
614 g_assert_not_reached ();
618 * Obtain the vtable from the 'this' arg.
620 this = mono_arch_get_this_arg_from_call (regs, code);
626 /* Normal virtual call */
627 vtable_slot = &(vt->vtable [slot]);
629 /* Avoid loading metadata or creating a generic vtable if possible */
630 addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, slot);
631 if (addr && !vt->klass->valuetype) {
632 if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
635 return mono_create_ftnptr (mono_domain_get (), addr);
640 * is_generic_method_definition() above) also
641 * goes away if we do a
642 * mono_class_setup_vtable (vt->klass) here,
643 * because we then inflate the method
644 * correctly, put it in the cache, and the
645 * "wrong" inflation invocation still looks up
646 * the correctly inflated method.
648 * The hack above seems more stable and
651 m = mono_class_get_vtable_entry (vt->klass, slot);
653 need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (m, 0);
656 vtable_slot = &(((gpointer*)vt) [slot]);
659 need_rgctx_tramp = FALSE;
662 return common_call_trampoline (regs, code, m, tramp, vt, vtable_slot, need_rgctx_tramp);
666 mono_generic_virtual_remoting_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8 *tramp)
668 MonoGenericContext context = { NULL, NULL };
669 MonoMethod *imt_method, *declaring;
674 g_assert (m->is_generic);
677 declaring = mono_method_get_declaring_generic_method (m);
681 if (m->klass->generic_class)
682 context.class_inst = m->klass->generic_class->context.class_inst;
684 g_assert (!m->klass->generic_container);
686 #ifdef MONO_ARCH_HAVE_IMT
687 imt_method = mono_arch_find_imt_method (regs, code);
688 if (imt_method->is_inflated)
689 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
691 m = mono_class_inflate_generic_method (declaring, &context);
692 m = mono_marshal_get_remoting_invoke_with_check (m);
694 addr = mono_compile_method (m);
697 mono_debugger_trampoline_compiled (NULL, m, addr);
703 * mono_aot_trampoline:
705 * This trampoline handles calls made from AOT code. We try to bypass the
706 * normal JIT compilation logic to avoid loading the metadata for the method.
708 #ifdef MONO_ARCH_AOT_SUPPORTED
710 mono_aot_trampoline (mgreg_t *regs, guint8 *code, guint8 *token_info,
715 MonoMethod *method = NULL;
721 image = *(gpointer*)(gpointer)token_info;
722 token_info += sizeof (gpointer);
723 token = *(guint32*)(gpointer)token_info;
725 addr = mono_aot_get_method_from_token (mono_domain_get (), image, token);
727 method = mono_get_method (image, token, NULL);
730 /* Use the generic code */
731 return mono_magic_trampoline (regs, code, method, tramp);
734 addr = mono_create_ftnptr (mono_domain_get (), addr);
736 /* This is a normal call through a PLT entry */
737 plt_entry = mono_aot_get_plt_entry (code);
738 g_assert (plt_entry);
740 mono_aot_patch_plt_entry (plt_entry, NULL, regs, addr);
746 * mono_aot_plt_trampoline:
748 * This trampoline handles calls made from AOT code through the PLT table.
751 mono_aot_plt_trampoline (mgreg_t *regs, guint8 *code, guint8 *aot_module,
754 guint32 plt_info_offset = mono_aot_get_plt_info_offset (regs, code);
759 res = mono_aot_plt_resolve (aot_module, plt_info_offset, code);
761 if (mono_loader_get_last_error ())
762 mono_raise_exception (mono_loader_error_prepare_exception (mono_loader_get_last_error ()));
763 // FIXME: Error handling (how ?)
772 * mono_class_init_trampoline:
774 * This method calls mono_runtime_class_init () to run the static constructor
775 * for the type, then patches the caller code so it is not called again.
778 mono_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp)
780 guint8 *plt_entry = mono_aot_get_plt_entry (code);
784 mono_runtime_class_init (vtable);
787 mono_arch_nullify_plt_entry (plt_entry, regs);
789 mono_arch_nullify_class_init_trampoline (code, regs);
794 * mono_generic_class_init_trampoline:
796 * This method calls mono_runtime_class_init () to run the static constructor
800 mono_generic_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp)
804 mono_runtime_class_init (vtable);
808 mono_rgctx_lazy_fetch_trampoline (mgreg_t *regs, guint8 *code, gpointer data, guint8 *tramp)
810 #ifdef MONO_ARCH_VTABLE_REG
811 static gboolean inited = FALSE;
812 static int num_lookups = 0;
813 guint32 slot = GPOINTER_TO_UINT (data);
814 mgreg_t *r = (mgreg_t*)regs;
815 gpointer arg = (gpointer)(gssize)r [MONO_ARCH_VTABLE_REG];
816 guint32 index = MONO_RGCTX_SLOT_INDEX (slot);
817 gboolean mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
822 mono_counters_register ("RGCTX unmanaged lookups", MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_lookups);
829 return mono_method_fill_runtime_generic_context (arg, index);
831 return mono_class_fill_runtime_generic_context (arg, index);
833 g_assert_not_reached ();
838 mono_monitor_enter_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
840 mono_monitor_enter (obj);
844 mono_monitor_exit_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
846 mono_monitor_exit (obj);
849 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
852 * mono_delegate_trampoline:
854 * This trampoline handles calls made to Delegate:Invoke ().
855 * This is called once the first time a delegate is invoked, so it must be fast.
858 mono_delegate_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp)
860 MonoDomain *domain = mono_domain_get ();
861 MonoDelegate *delegate;
864 MonoMethod *method = NULL;
865 gboolean multicast, callvirt = FALSE;
866 gboolean need_rgctx_tramp = FALSE;
867 gboolean enable_caching = TRUE;
868 MonoMethod *invoke = tramp_data [0];
869 guint8 *impl_this = tramp_data [1];
870 guint8 *impl_nothis = tramp_data [2];
872 MonoMethodSignature *sig;
876 /* Obtain the delegate object according to the calling convention */
877 delegate = mono_arch_get_this_arg_from_call (regs, code);
879 if (delegate->method) {
880 method = delegate->method;
883 * delegate->method_ptr == NULL means the delegate was initialized by
884 * mini_delegate_ctor, while != NULL means it is initialized by
885 * mono_delegate_ctor_with_method (). In both cases, we need to add wrappers
886 * (ctor_with_method () does this, but it doesn't store the wrapper back into
889 if (delegate->target && delegate->target->vtable->klass == mono_defaults.transparent_proxy_class) {
891 if (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class != mono_defaults.com_object_class &&
892 !((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class->is_com_object)
894 method = mono_marshal_get_remoting_invoke (method);
897 mono_error_init (&err);
898 sig = mono_method_signature_checked (method, &err);
900 mono_error_raise_exception (&err);
902 if (sig->hasthis && method->klass->valuetype)
903 method = mono_marshal_get_unbox_wrapper (method);
906 ji = mono_jit_info_table_find (domain, mono_get_addr_from_ftnptr (delegate->method_ptr));
912 mono_error_init (&err);
913 sig = mono_method_signature_checked (method, &err);
915 mono_error_raise_exception (&err);
917 callvirt = !delegate->target && sig->hasthis;
918 if (delegate->target &&
919 method->flags & METHOD_ATTRIBUTE_VIRTUAL &&
920 method->flags & METHOD_ATTRIBUTE_ABSTRACT &&
921 method->klass->flags & TYPE_ATTRIBUTE_ABSTRACT) {
922 method = mono_object_get_virtual_method (delegate->target, method);
923 enable_caching = FALSE;
927 if (method && method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
928 method = mono_marshal_get_synchronized_wrapper (method);
930 if (method && mono_method_needs_static_rgctx_invoke (method, FALSE))
931 need_rgctx_tramp = TRUE;
934 * If the called address is a trampoline, replace it with the compiled method so
935 * further calls don't have to go through the trampoline.
937 if (method && !callvirt) {
938 /* Avoid the overhead of looking up an already compiled method if possible */
939 if (enable_caching && delegate->method_code && *delegate->method_code) {
940 delegate->method_ptr = *delegate->method_code;
942 delegate->method_ptr = mono_compile_method (method);
943 if (need_rgctx_tramp)
944 delegate->method_ptr = mono_create_static_rgctx_trampoline (method, delegate->method_ptr);
945 if (enable_caching && delegate->method_code)
946 *delegate->method_code = delegate->method_ptr;
947 mono_debugger_trampoline_compiled (NULL, method, delegate->method_ptr);
950 if (need_rgctx_tramp)
951 delegate->method_ptr = mono_create_static_rgctx_trampoline (method, delegate->method_ptr);
954 multicast = ((MonoMulticastDelegate*)delegate)->prev != NULL;
955 if (!multicast && !callvirt) {
956 if (method && (method->flags & METHOD_ATTRIBUTE_STATIC) && mono_method_signature (method)->param_count == mono_method_signature (invoke)->param_count + 1)
957 /* Closed static delegate */
960 code = delegate->target ? impl_this : impl_nothis;
963 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
968 /* The general, unoptimized case */
969 m = mono_marshal_get_delegate_invoke (invoke, delegate);
970 code = mono_compile_method (m);
971 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
972 mono_debugger_trampoline_compiled (NULL, m, delegate->invoke_impl);
979 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
981 mono_handler_block_guard_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp)
985 MonoJitTlsData *jit_tls = TlsGetValue (mono_jit_tls_id);
986 gpointer resume_ip = jit_tls->handler_block_return_address;
988 memcpy (&ctx, &jit_tls->handler_block_context, sizeof (MonoContext));
989 MONO_CONTEXT_SET_IP (&ctx, jit_tls->handler_block_return_address);
991 jit_tls->handler_block_return_address = NULL;
992 jit_tls->handler_block = NULL;
994 if (!resume_ip) /*this should not happen, but we should avoid crashing */
995 exc = mono_get_exception_execution_engine ("Invalid internal state, resuming abort after handler block but no resume ip found");
997 exc = mono_thread_resume_interruption ();
1000 static void (*restore_context) (MonoContext *);
1002 if (!restore_context)
1003 restore_context = mono_get_restore_context ();
1005 mono_handle_exception (&ctx, exc, NULL, FALSE);
1006 restore_context (&ctx);
1013 mono_create_handler_block_trampoline (void)
1015 static gpointer code;
1017 if (mono_aot_only) {
1022 mono_trampolines_lock ();
1025 code = mono_arch_create_handler_block_trampoline ();
1027 mono_trampolines_unlock ();
1034 * mono_get_trampoline_func:
1036 * Return the C function which needs to be called by the generic trampoline of type
1040 mono_get_trampoline_func (MonoTrampolineType tramp_type)
1042 switch (tramp_type) {
1043 case MONO_TRAMPOLINE_JIT:
1044 case MONO_TRAMPOLINE_JUMP:
1045 return mono_magic_trampoline;
1046 case MONO_TRAMPOLINE_CLASS_INIT:
1047 return mono_class_init_trampoline;
1048 case MONO_TRAMPOLINE_GENERIC_CLASS_INIT:
1049 return mono_generic_class_init_trampoline;
1050 case MONO_TRAMPOLINE_RGCTX_LAZY_FETCH:
1051 return mono_rgctx_lazy_fetch_trampoline;
1052 #ifdef MONO_ARCH_AOT_SUPPORTED
1053 case MONO_TRAMPOLINE_AOT:
1054 return mono_aot_trampoline;
1055 case MONO_TRAMPOLINE_AOT_PLT:
1056 return mono_aot_plt_trampoline;
1058 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1059 case MONO_TRAMPOLINE_DELEGATE:
1060 return mono_delegate_trampoline;
1062 case MONO_TRAMPOLINE_RESTORE_STACK_PROT:
1063 return mono_altstack_restore_prot;
1064 case MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING:
1065 return mono_generic_virtual_remoting_trampoline;
1066 case MONO_TRAMPOLINE_MONITOR_ENTER:
1067 return mono_monitor_enter_trampoline;
1068 case MONO_TRAMPOLINE_MONITOR_EXIT:
1069 return mono_monitor_exit_trampoline;
1070 case MONO_TRAMPOLINE_VCALL:
1071 return mono_vcall_trampoline;
1072 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1073 case MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD:
1074 return mono_handler_block_guard_trampoline;
1077 g_assert_not_reached ();
1083 create_trampoline_code (MonoTrampolineType tramp_type)
1085 MonoTrampInfo *info;
1088 code = mono_arch_create_generic_trampoline (tramp_type, &info, FALSE);
1090 mono_save_trampoline_xdebug_info (info);
1091 if (mono_jit_map_is_enabled ())
1092 mono_emit_jit_tramp (info->code, info->code_size, info->name);
1093 mono_tramp_info_free (info);
1100 mono_trampolines_init (void)
1102 InitializeCriticalSection (&trampolines_mutex);
1107 mono_trampoline_code [MONO_TRAMPOLINE_JIT] = create_trampoline_code (MONO_TRAMPOLINE_JIT);
1108 mono_trampoline_code [MONO_TRAMPOLINE_JUMP] = create_trampoline_code (MONO_TRAMPOLINE_JUMP);
1109 mono_trampoline_code [MONO_TRAMPOLINE_CLASS_INIT] = create_trampoline_code (MONO_TRAMPOLINE_CLASS_INIT);
1110 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_CLASS_INIT] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_CLASS_INIT);
1111 mono_trampoline_code [MONO_TRAMPOLINE_RGCTX_LAZY_FETCH] = create_trampoline_code (MONO_TRAMPOLINE_RGCTX_LAZY_FETCH);
1112 #ifdef MONO_ARCH_AOT_SUPPORTED
1113 mono_trampoline_code [MONO_TRAMPOLINE_AOT] = create_trampoline_code (MONO_TRAMPOLINE_AOT);
1114 mono_trampoline_code [MONO_TRAMPOLINE_AOT_PLT] = create_trampoline_code (MONO_TRAMPOLINE_AOT_PLT);
1116 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1117 mono_trampoline_code [MONO_TRAMPOLINE_DELEGATE] = create_trampoline_code (MONO_TRAMPOLINE_DELEGATE);
1119 mono_trampoline_code [MONO_TRAMPOLINE_RESTORE_STACK_PROT] = create_trampoline_code (MONO_TRAMPOLINE_RESTORE_STACK_PROT);
1120 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING);
1121 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_ENTER] = create_trampoline_code (MONO_TRAMPOLINE_MONITOR_ENTER);
1122 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_EXIT] = create_trampoline_code (MONO_TRAMPOLINE_MONITOR_EXIT);
1123 mono_trampoline_code [MONO_TRAMPOLINE_VCALL] = create_trampoline_code (MONO_TRAMPOLINE_VCALL);
1124 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1125 mono_trampoline_code [MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD] = create_trampoline_code (MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD);
1126 mono_create_handler_block_trampoline ();
1129 mono_counters_register ("Calls to trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &trampoline_calls);
1130 mono_counters_register ("JIT trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &jit_trampolines);
1131 mono_counters_register ("Unbox trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &unbox_trampolines);
1132 mono_counters_register ("Static rgctx trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &static_rgctx_trampolines);
1136 mono_trampolines_cleanup (void)
1138 if (class_init_hash_addr)
1139 g_hash_table_destroy (class_init_hash_addr);
1140 if (rgctx_lazy_fetch_trampoline_hash)
1141 g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash);
1142 if (rgctx_lazy_fetch_trampoline_hash_addr)
1143 g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash_addr);
1145 DeleteCriticalSection (&trampolines_mutex);
1149 mono_get_trampoline_code (MonoTrampolineType tramp_type)
1151 g_assert (mono_trampoline_code [tramp_type]);
1153 return mono_trampoline_code [tramp_type];
1157 mono_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
1160 return mono_aot_create_specific_trampoline (mono_defaults.corlib, arg1, tramp_type, domain, code_len);
1162 return mono_arch_create_specific_trampoline (arg1, tramp_type, domain, code_len);
1166 mono_create_class_init_trampoline (MonoVTable *vtable)
1169 MonoDomain *domain = vtable->domain;
1171 g_assert (!vtable->klass->generic_container);
1173 /* previously created trampoline code */
1174 mono_domain_lock (domain);
1176 g_hash_table_lookup (domain_jit_info (domain)->class_init_trampoline_hash,
1178 mono_domain_unlock (domain);
1182 code = mono_create_specific_trampoline (vtable, MONO_TRAMPOLINE_CLASS_INIT, domain, NULL);
1184 ptr = mono_create_ftnptr (domain, code);
1186 /* store trampoline address */
1187 mono_domain_lock (domain);
1188 g_hash_table_insert (domain_jit_info (domain)->class_init_trampoline_hash,
1190 mono_domain_unlock (domain);
1192 mono_trampolines_lock ();
1193 if (!class_init_hash_addr)
1194 class_init_hash_addr = g_hash_table_new (NULL, NULL);
1195 g_hash_table_insert (class_init_hash_addr, ptr, vtable);
1196 mono_trampolines_unlock ();
1202 mono_create_generic_class_init_trampoline (void)
1204 #ifdef MONO_ARCH_VTABLE_REG
1205 static gpointer code;
1206 MonoTrampInfo *info;
1208 mono_trampolines_lock ();
1212 /* get_named_code () might return an ftnptr, but our caller expects a direct pointer */
1213 code = mono_get_addr_from_ftnptr (mono_aot_get_trampoline ("generic_class_init_trampoline"));
1215 code = mono_arch_create_generic_class_init_trampoline (&info, FALSE);
1218 mono_save_trampoline_xdebug_info (info);
1219 if (mono_jit_map_is_enabled ())
1220 mono_emit_jit_tramp (info->code, info->code_size, info->name);
1221 mono_tramp_info_free (info);
1226 mono_trampolines_unlock ();
1230 g_assert_not_reached ();
1235 mono_create_jump_trampoline (MonoDomain *domain, MonoMethod *method, gboolean add_sync_wrapper)
1239 guint32 code_size = 0;
1241 code = mono_jit_find_compiled_method_with_jit_info (domain, method, &ji);
1243 * We cannot recover the correct type of a shared generic
1244 * method from its native code address, so we use the
1245 * trampoline instead.
1247 if (code && !ji->has_generic_jit_info)
1250 mono_domain_lock (domain);
1251 code = g_hash_table_lookup (domain_jit_info (domain)->jump_trampoline_hash, method);
1252 mono_domain_unlock (domain);
1256 code = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JUMP, mono_domain_get (), &code_size);
1257 g_assert (code_size);
1259 ji = mono_domain_alloc0 (domain, MONO_SIZEOF_JIT_INFO);
1260 ji->code_start = code;
1261 ji->code_size = code_size;
1262 ji->method = method;
1265 * mono_delegate_ctor needs to find the method metadata from the
1266 * trampoline address, so we save it here.
1269 mono_jit_info_table_add (domain, ji);
1271 mono_domain_lock (domain);
1272 g_hash_table_insert (domain_jit_info (domain)->jump_trampoline_hash, method, ji->code_start);
1273 mono_domain_unlock (domain);
1275 return ji->code_start;
1279 mono_create_jit_trampoline_in_domain (MonoDomain *domain, MonoMethod *method)
1283 if (mono_aot_only) {
1284 /* Avoid creating trampolines if possible */
1285 gpointer code = mono_jit_find_compiled_method (domain, method);
1291 mono_domain_lock (domain);
1292 tramp = g_hash_table_lookup (domain_jit_info (domain)->jit_trampoline_hash, method);
1293 mono_domain_unlock (domain);
1297 tramp = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JIT, domain, NULL);
1299 mono_domain_lock (domain);
1300 g_hash_table_insert (domain_jit_info (domain)->jit_trampoline_hash, method, tramp);
1301 mono_domain_unlock (domain);
1309 mono_create_jit_trampoline (MonoMethod *method)
1311 return mono_create_jit_trampoline_in_domain (mono_domain_get (), method);
1315 mono_create_jit_trampoline_from_token (MonoImage *image, guint32 token)
1319 MonoDomain *domain = mono_domain_get ();
1320 guint8 *buf, *start;
1322 buf = start = mono_domain_code_reserve (domain, 2 * sizeof (gpointer));
1324 *(gpointer*)(gpointer)buf = image;
1325 buf += sizeof (gpointer);
1326 *(guint32*)(gpointer)buf = token;
1328 tramp = mono_create_specific_trampoline (start, MONO_TRAMPOLINE_AOT, domain, NULL);
1336 mono_create_delegate_trampoline (MonoClass *klass)
1338 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1339 MonoDomain *domain = mono_domain_get ();
1341 guint32 code_size = 0;
1342 gpointer *tramp_data;
1345 mono_domain_lock (domain);
1346 ptr = g_hash_table_lookup (domain_jit_info (domain)->delegate_trampoline_hash, klass);
1347 mono_domain_unlock (domain);
1351 // Precompute the delegate invoke impl and pass it to the delegate trampoline
1352 invoke = mono_get_delegate_invoke (klass);
1355 tramp_data = mono_domain_alloc (domain, sizeof (gpointer) * 3);
1356 tramp_data [0] = invoke;
1357 tramp_data [1] = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), TRUE);
1358 tramp_data [2] = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), FALSE);
1360 ptr = mono_create_specific_trampoline (tramp_data, MONO_TRAMPOLINE_DELEGATE, mono_domain_get (), &code_size);
1361 g_assert (code_size);
1363 /* store trampoline address */
1364 mono_domain_lock (domain);
1365 g_hash_table_insert (domain_jit_info (domain)->delegate_trampoline_hash,
1367 mono_domain_unlock (domain);
1376 mono_create_rgctx_lazy_fetch_trampoline (guint32 offset)
1378 static gboolean inited = FALSE;
1379 static int num_trampolines = 0;
1380 MonoTrampInfo *info;
1382 gpointer tramp, ptr;
1385 return mono_aot_get_lazy_fetch_trampoline (offset);
1387 mono_trampolines_lock ();
1388 if (rgctx_lazy_fetch_trampoline_hash)
1389 tramp = g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset));
1392 mono_trampolines_unlock ();
1396 tramp = mono_arch_create_rgctx_lazy_fetch_trampoline (offset, &info, FALSE);
1398 mono_save_trampoline_xdebug_info (info);
1399 if (mono_jit_map_is_enabled ())
1400 mono_emit_jit_tramp (info->code, info->code_size, info->name);
1401 mono_tramp_info_free (info);
1403 ptr = mono_create_ftnptr (mono_get_root_domain (), tramp);
1405 mono_trampolines_lock ();
1406 if (!rgctx_lazy_fetch_trampoline_hash) {
1407 rgctx_lazy_fetch_trampoline_hash = g_hash_table_new (NULL, NULL);
1408 rgctx_lazy_fetch_trampoline_hash_addr = g_hash_table_new (NULL, NULL);
1410 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset), ptr);
1411 g_assert (offset != -1);
1412 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash_addr, ptr, GUINT_TO_POINTER (offset + 1));
1413 mono_trampolines_unlock ();
1416 mono_counters_register ("RGCTX num lazy fetch trampolines",
1417 MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_trampolines);
1426 mono_create_monitor_enter_trampoline (void)
1428 static gpointer code;
1429 MonoTrampInfo *info;
1431 if (mono_aot_only) {
1433 code = mono_aot_get_trampoline ("monitor_enter_trampoline");
1437 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
1438 mono_trampolines_lock ();
1441 code = mono_arch_create_monitor_enter_trampoline (&info, FALSE);
1443 mono_save_trampoline_xdebug_info (info);
1444 if (mono_jit_map_is_enabled ())
1445 mono_emit_jit_tramp (info->code, info->code_size, info->name);
1446 mono_tramp_info_free (info);
1450 mono_trampolines_unlock ();
1453 g_assert_not_reached ();
1460 mono_create_monitor_exit_trampoline (void)
1462 static gpointer code;
1463 MonoTrampInfo *info;
1465 if (mono_aot_only) {
1467 code = mono_aot_get_trampoline ("monitor_exit_trampoline");
1471 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
1472 mono_trampolines_lock ();
1475 code = mono_arch_create_monitor_exit_trampoline (&info, FALSE);
1477 mono_save_trampoline_xdebug_info (info);
1478 if (mono_jit_map_is_enabled ())
1479 mono_emit_jit_tramp (info->code, info->code_size, info->name);
1480 mono_tramp_info_free (info);
1484 mono_trampolines_unlock ();
1487 g_assert_not_reached ();
1492 #ifdef MONO_ARCH_LLVM_SUPPORTED
1494 * mono_create_llvm_imt_trampoline:
1496 * LLVM compiled code can't pass in the IMT argument, so we use this trampoline, which
1497 * sets the IMT argument, then branches to the contents of the vtable slot given by
1498 * vt_offset in the vtable which is obtained from the argument list.
1501 mono_create_llvm_imt_trampoline (MonoDomain *domain, MonoMethod *m, int vt_offset)
1503 #ifdef MONO_ARCH_HAVE_LLVM_IMT_TRAMPOLINE
1504 return mono_arch_get_llvm_imt_trampoline (domain, m, vt_offset);
1506 g_assert_not_reached ();
1513 mono_find_class_init_trampoline_by_addr (gconstpointer addr)
1517 mono_trampolines_lock ();
1518 if (class_init_hash_addr)
1519 res = g_hash_table_lookup (class_init_hash_addr, addr);
1522 mono_trampolines_unlock ();
1527 mono_find_rgctx_lazy_fetch_trampoline_by_addr (gconstpointer addr)
1531 mono_trampolines_lock ();
1532 if (rgctx_lazy_fetch_trampoline_hash_addr) {
1533 /* We store the real offset + 1 so we can detect when the lookup fails */
1534 offset = GPOINTER_TO_INT (g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash_addr, addr));
1542 mono_trampolines_unlock ();
1546 static const char*tramp_names [MONO_TRAMPOLINE_NUM] = {
1550 "generic_class_init",
1555 "restore_stack_prot",
1556 "generic_virtual_remoting",
1560 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1561 "handler_block_guard"
1566 * mono_get_generic_trampoline_name:
1568 * Returns a pointer to malloc-ed memory.
1571 mono_get_generic_trampoline_name (MonoTrampolineType tramp_type)
1573 return g_strdup_printf ("generic_trampoline_%s", tramp_names [tramp_type]);
1577 * mono_get_rgctx_fetch_trampoline_name:
1579 * Returns a pointer to malloc-ed memory.
1582 mono_get_rgctx_fetch_trampoline_name (int slot)
1587 mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
1588 index = MONO_RGCTX_SLOT_INDEX (slot);
1590 return g_strdup_printf ("rgctx_fetch_trampoline_%s_%d", mrgctx ? "mrgctx" : "rgctx", index);