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);
473 /* Calls made through delegates on platforms without delegate trampolines */
474 if (!code && mono_method_needs_static_rgctx_invoke (m, FALSE))
475 need_rgctx_tramp = TRUE;
477 addr = compiled_method = mono_compile_method (m);
480 mono_debugger_trampoline_compiled (code, m, addr);
482 if (need_rgctx_tramp)
483 addr = mono_create_static_rgctx_trampoline (m, addr);
485 if (generic_virtual || variant_iface) {
486 MonoMethod *target = generic_virtual ? generic_virtual : variant_iface;
488 vtable_slot = orig_vtable_slot;
489 g_assert (vtable_slot);
491 if (vt->klass->valuetype) /*FIXME is this required variant iface?*/
492 addr = get_unbox_trampoline (m, addr, need_rgctx_tramp);
494 mono_method_add_generic_virtual_invocation (mono_domain_get (),
501 /* the method was jumped to */
503 MonoDomain *domain = mono_domain_get ();
505 /* Patch the got entries pointing to this method */
507 * We do this here instead of in mono_codegen () to cover the case when m
508 * was loaded from an aot image.
510 if (domain_jit_info (domain)->jump_target_got_slot_hash) {
513 mono_domain_lock (domain);
514 list = g_hash_table_lookup (domain_jit_info (domain)->jump_target_got_slot_hash, m);
516 for (tmp = list; tmp; tmp = tmp->next) {
517 gpointer *got_slot = tmp->data;
520 g_hash_table_remove (domain_jit_info (domain)->jump_target_got_slot_hash, m);
523 mono_domain_unlock (domain);
529 vtable_slot = orig_vtable_slot;
532 if (m->klass->valuetype)
533 addr = get_unbox_trampoline (m, addr, need_rgctx_tramp);
535 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))) {
536 g_assert (*vtable_slot_to_patch);
537 *vtable_slot_to_patch = mono_get_addr_from_ftnptr (addr);
541 guint8 *plt_entry = mono_aot_get_plt_entry (code);
544 mono_aot_patch_plt_entry (plt_entry, NULL, regs, addr);
546 if (generic_shared) {
547 if (m->wrapper_type != MONO_WRAPPER_NONE)
548 m = mono_marshal_method_from_wrapper (m);
549 g_assert (mono_method_is_generic_sharable_impl (m, FALSE));
552 /* Patch calling code */
554 MonoJitInfo *target_ji =
555 mono_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method));
558 ji = mono_jit_info_table_find (mono_domain_get (), (char*)code);
560 if (mono_method_same_domain (ji, target_ji))
561 mono_arch_patch_callsite (ji->code_start, code, addr);
570 * mono_magic_trampoline:
572 * This trampoline handles normal calls from JITted code.
575 mono_magic_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp)
579 return common_call_trampoline (regs, code, arg, tramp, NULL, NULL, FALSE);
583 * mono_vcall_trampoline:
585 * This trampoline handles virtual calls.
588 mono_vcall_trampoline (mgreg_t *regs, guint8 *code, int slot, guint8 *tramp)
592 gpointer *vtable_slot;
594 gboolean need_rgctx_tramp = FALSE;
600 * We need to obtain the following pieces of information:
601 * - the method which needs to be compiled.
603 * We use one vtable trampoline per vtable slot index, so we need only the vtable,
604 * the other two can be computed from the vtable + the slot index.
606 #ifndef MONO_ARCH_THIS_AS_FIRST_ARG
607 /* All architectures should support this */
608 g_assert_not_reached ();
612 * Obtain the vtable from the 'this' arg.
614 this = mono_arch_get_this_arg_from_call (regs, code);
620 /* Normal virtual call */
621 vtable_slot = &(vt->vtable [slot]);
623 /* Avoid loading metadata or creating a generic vtable if possible */
624 addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, slot);
625 if (addr && !vt->klass->valuetype) {
626 if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
629 return mono_create_ftnptr (mono_domain_get (), addr);
634 * is_generic_method_definition() above) also
635 * goes away if we do a
636 * mono_class_setup_vtable (vt->klass) here,
637 * because we then inflate the method
638 * correctly, put it in the cache, and the
639 * "wrong" inflation invocation still looks up
640 * the correctly inflated method.
642 * The hack above seems more stable and
645 m = mono_class_get_vtable_entry (vt->klass, slot);
647 need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (m, 0);
650 vtable_slot = &(((gpointer*)vt) [slot]);
653 need_rgctx_tramp = FALSE;
656 return common_call_trampoline (regs, code, m, tramp, vt, vtable_slot, need_rgctx_tramp);
660 mono_generic_virtual_remoting_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8 *tramp)
662 MonoGenericContext context = { NULL, NULL };
663 MonoMethod *imt_method, *declaring;
668 g_assert (m->is_generic);
671 declaring = mono_method_get_declaring_generic_method (m);
675 if (m->klass->generic_class)
676 context.class_inst = m->klass->generic_class->context.class_inst;
678 g_assert (!m->klass->generic_container);
680 #ifdef MONO_ARCH_HAVE_IMT
681 imt_method = mono_arch_find_imt_method (regs, code);
682 if (imt_method->is_inflated)
683 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
685 m = mono_class_inflate_generic_method (declaring, &context);
686 m = mono_marshal_get_remoting_invoke_with_check (m);
688 addr = mono_compile_method (m);
691 mono_debugger_trampoline_compiled (NULL, m, addr);
697 * mono_aot_trampoline:
699 * This trampoline handles calls made from AOT code. We try to bypass the
700 * normal JIT compilation logic to avoid loading the metadata for the method.
702 #ifdef MONO_ARCH_AOT_SUPPORTED
704 mono_aot_trampoline (mgreg_t *regs, guint8 *code, guint8 *token_info,
709 MonoMethod *method = NULL;
715 image = *(gpointer*)(gpointer)token_info;
716 token_info += sizeof (gpointer);
717 token = *(guint32*)(gpointer)token_info;
719 addr = mono_aot_get_method_from_token (mono_domain_get (), image, token);
721 method = mono_get_method (image, token, NULL);
724 /* Use the generic code */
725 return mono_magic_trampoline (regs, code, method, tramp);
728 addr = mono_create_ftnptr (mono_domain_get (), addr);
730 /* This is a normal call through a PLT entry */
731 plt_entry = mono_aot_get_plt_entry (code);
732 g_assert (plt_entry);
734 mono_aot_patch_plt_entry (plt_entry, NULL, regs, addr);
740 * mono_aot_plt_trampoline:
742 * This trampoline handles calls made from AOT code through the PLT table.
745 mono_aot_plt_trampoline (mgreg_t *regs, guint8 *code, guint8 *aot_module,
748 guint32 plt_info_offset = mono_aot_get_plt_info_offset (regs, code);
753 res = mono_aot_plt_resolve (aot_module, plt_info_offset, code);
755 if (mono_loader_get_last_error ())
756 mono_raise_exception (mono_loader_error_prepare_exception (mono_loader_get_last_error ()));
757 // FIXME: Error handling (how ?)
766 * mono_class_init_trampoline:
768 * This method calls mono_runtime_class_init () to run the static constructor
769 * for the type, then patches the caller code so it is not called again.
772 mono_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp)
774 guint8 *plt_entry = mono_aot_get_plt_entry (code);
778 mono_runtime_class_init (vtable);
781 mono_arch_nullify_plt_entry (plt_entry, regs);
783 mono_arch_nullify_class_init_trampoline (code, regs);
788 * mono_generic_class_init_trampoline:
790 * This method calls mono_runtime_class_init () to run the static constructor
794 mono_generic_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp)
798 mono_runtime_class_init (vtable);
802 mono_rgctx_lazy_fetch_trampoline (mgreg_t *regs, guint8 *code, gpointer data, guint8 *tramp)
804 #ifdef MONO_ARCH_VTABLE_REG
805 static gboolean inited = FALSE;
806 static int num_lookups = 0;
807 guint32 slot = GPOINTER_TO_UINT (data);
808 mgreg_t *r = (mgreg_t*)regs;
809 gpointer arg = (gpointer)(gssize)r [MONO_ARCH_VTABLE_REG];
810 guint32 index = MONO_RGCTX_SLOT_INDEX (slot);
811 gboolean mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
816 mono_counters_register ("RGCTX unmanaged lookups", MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_lookups);
823 return mono_method_fill_runtime_generic_context (arg, index);
825 return mono_class_fill_runtime_generic_context (arg, index);
827 g_assert_not_reached ();
832 mono_monitor_enter_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
834 mono_monitor_enter (obj);
838 mono_monitor_exit_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
840 mono_monitor_exit (obj);
843 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
846 * mono_delegate_trampoline:
848 * This trampoline handles calls made to Delegate:Invoke ().
849 * This is called once the first time a delegate is invoked, so it must be fast.
852 mono_delegate_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp)
854 MonoDomain *domain = mono_domain_get ();
855 MonoDelegate *delegate;
858 MonoMethod *method = NULL;
859 gboolean multicast, callvirt = FALSE;
860 gboolean need_rgctx_tramp = FALSE;
861 gboolean enable_caching = TRUE;
862 MonoMethod *invoke = tramp_data [0];
863 guint8 *impl_this = tramp_data [1];
864 guint8 *impl_nothis = tramp_data [2];
866 MonoMethodSignature *sig;
870 /* Obtain the delegate object according to the calling convention */
871 delegate = mono_arch_get_this_arg_from_call (regs, code);
873 if (delegate->method) {
874 method = delegate->method;
877 * delegate->method_ptr == NULL means the delegate was initialized by
878 * mini_delegate_ctor, while != NULL means it is initialized by
879 * mono_delegate_ctor_with_method (). In both cases, we need to add wrappers
880 * (ctor_with_method () does this, but it doesn't store the wrapper back into
883 if (delegate->target && delegate->target->vtable->klass == mono_defaults.transparent_proxy_class) {
885 if (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class != mono_defaults.com_object_class &&
886 !((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class->is_com_object)
888 method = mono_marshal_get_remoting_invoke (method);
891 mono_error_init (&err);
892 sig = mono_method_signature_checked (method, &err);
894 mono_error_raise_exception (&err);
896 if (sig->hasthis && method->klass->valuetype)
897 method = mono_marshal_get_unbox_wrapper (method);
900 ji = mono_jit_info_table_find (domain, mono_get_addr_from_ftnptr (delegate->method_ptr));
906 mono_error_init (&err);
907 sig = mono_method_signature_checked (method, &err);
909 mono_error_raise_exception (&err);
911 callvirt = !delegate->target && sig->hasthis;
912 if (delegate->target && method->flags & METHOD_ATTRIBUTE_VIRTUAL && method->klass->flags & TYPE_ATTRIBUTE_ABSTRACT) {
913 method = mono_object_get_virtual_method (delegate->target, method);
914 enable_caching = FALSE;
918 if (method && method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
919 method = mono_marshal_get_synchronized_wrapper (method);
921 if (method && mono_method_needs_static_rgctx_invoke (method, FALSE))
922 need_rgctx_tramp = TRUE;
925 * If the called address is a trampoline, replace it with the compiled method so
926 * further calls don't have to go through the trampoline.
928 if (method && !callvirt) {
929 /* Avoid the overhead of looking up an already compiled method if possible */
930 if (enable_caching && delegate->method_code && *delegate->method_code) {
931 delegate->method_ptr = *delegate->method_code;
933 delegate->method_ptr = mono_compile_method (method);
934 if (need_rgctx_tramp)
935 delegate->method_ptr = mono_create_static_rgctx_trampoline (method, delegate->method_ptr);
936 if (enable_caching && delegate->method_code)
937 *delegate->method_code = delegate->method_ptr;
938 mono_debugger_trampoline_compiled (NULL, method, delegate->method_ptr);
941 if (need_rgctx_tramp)
942 delegate->method_ptr = mono_create_static_rgctx_trampoline (method, delegate->method_ptr);
945 multicast = ((MonoMulticastDelegate*)delegate)->prev != NULL;
946 if (!multicast && !callvirt) {
947 if (method && (method->flags & METHOD_ATTRIBUTE_STATIC) && mono_method_signature (method)->param_count == mono_method_signature (invoke)->param_count + 1)
948 /* Closed static delegate */
951 code = delegate->target ? impl_this : impl_nothis;
954 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
959 /* The general, unoptimized case */
960 m = mono_marshal_get_delegate_invoke (invoke, delegate);
961 code = mono_compile_method (m);
962 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
963 mono_debugger_trampoline_compiled (NULL, m, delegate->invoke_impl);
970 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
972 mono_handler_block_guard_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp)
976 MonoJitTlsData *jit_tls = TlsGetValue (mono_jit_tls_id);
977 gpointer resume_ip = jit_tls->handler_block_return_address;
979 memcpy (&ctx, &jit_tls->ex_ctx, sizeof (MonoContext));
980 MONO_CONTEXT_SET_IP (&ctx, jit_tls->handler_block_return_address);
982 jit_tls->handler_block_return_address = NULL;
983 jit_tls->handler_block = NULL;
985 if (!resume_ip) /*this should not happen, but we should avoid crashing */
986 exc = mono_get_exception_execution_engine ("Invalid internal state, resuming abort after handler block but no resume ip found");
988 exc = mono_thread_resume_interruption ();
991 static void (*restore_context) (MonoContext *);
993 if (!restore_context)
994 restore_context = mono_get_restore_context ();
996 mono_handle_exception (&ctx, exc, NULL, FALSE);
997 restore_context (&ctx);
1004 mono_create_handler_block_trampoline (void)
1006 static gpointer code;
1008 if (mono_aot_only) {
1013 mono_trampolines_lock ();
1016 code = mono_arch_create_handler_block_trampoline ();
1018 mono_trampolines_unlock ();
1025 * mono_get_trampoline_func:
1027 * Return the C function which needs to be called by the generic trampoline of type
1031 mono_get_trampoline_func (MonoTrampolineType tramp_type)
1033 switch (tramp_type) {
1034 case MONO_TRAMPOLINE_JIT:
1035 case MONO_TRAMPOLINE_JUMP:
1036 return mono_magic_trampoline;
1037 case MONO_TRAMPOLINE_CLASS_INIT:
1038 return mono_class_init_trampoline;
1039 case MONO_TRAMPOLINE_GENERIC_CLASS_INIT:
1040 return mono_generic_class_init_trampoline;
1041 case MONO_TRAMPOLINE_RGCTX_LAZY_FETCH:
1042 return mono_rgctx_lazy_fetch_trampoline;
1043 #ifdef MONO_ARCH_AOT_SUPPORTED
1044 case MONO_TRAMPOLINE_AOT:
1045 return mono_aot_trampoline;
1046 case MONO_TRAMPOLINE_AOT_PLT:
1047 return mono_aot_plt_trampoline;
1049 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1050 case MONO_TRAMPOLINE_DELEGATE:
1051 return mono_delegate_trampoline;
1053 case MONO_TRAMPOLINE_RESTORE_STACK_PROT:
1054 return mono_altstack_restore_prot;
1055 case MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING:
1056 return mono_generic_virtual_remoting_trampoline;
1057 case MONO_TRAMPOLINE_MONITOR_ENTER:
1058 return mono_monitor_enter_trampoline;
1059 case MONO_TRAMPOLINE_MONITOR_EXIT:
1060 return mono_monitor_exit_trampoline;
1061 case MONO_TRAMPOLINE_VCALL:
1062 return mono_vcall_trampoline;
1063 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1064 case MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD:
1065 return mono_handler_block_guard_trampoline;
1068 g_assert_not_reached ();
1074 create_trampoline_code (MonoTrampolineType tramp_type)
1076 MonoTrampInfo *info;
1079 code = mono_arch_create_generic_trampoline (tramp_type, &info, FALSE);
1081 mono_save_trampoline_xdebug_info (info);
1082 if (mono_jit_map_is_enabled ())
1083 mono_emit_jit_tramp (info->code, info->code_size, info->name);
1084 mono_tramp_info_free (info);
1091 mono_trampolines_init (void)
1093 InitializeCriticalSection (&trampolines_mutex);
1098 mono_trampoline_code [MONO_TRAMPOLINE_JIT] = create_trampoline_code (MONO_TRAMPOLINE_JIT);
1099 mono_trampoline_code [MONO_TRAMPOLINE_JUMP] = create_trampoline_code (MONO_TRAMPOLINE_JUMP);
1100 mono_trampoline_code [MONO_TRAMPOLINE_CLASS_INIT] = create_trampoline_code (MONO_TRAMPOLINE_CLASS_INIT);
1101 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_CLASS_INIT] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_CLASS_INIT);
1102 mono_trampoline_code [MONO_TRAMPOLINE_RGCTX_LAZY_FETCH] = create_trampoline_code (MONO_TRAMPOLINE_RGCTX_LAZY_FETCH);
1103 #ifdef MONO_ARCH_AOT_SUPPORTED
1104 mono_trampoline_code [MONO_TRAMPOLINE_AOT] = create_trampoline_code (MONO_TRAMPOLINE_AOT);
1105 mono_trampoline_code [MONO_TRAMPOLINE_AOT_PLT] = create_trampoline_code (MONO_TRAMPOLINE_AOT_PLT);
1107 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1108 mono_trampoline_code [MONO_TRAMPOLINE_DELEGATE] = create_trampoline_code (MONO_TRAMPOLINE_DELEGATE);
1110 mono_trampoline_code [MONO_TRAMPOLINE_RESTORE_STACK_PROT] = create_trampoline_code (MONO_TRAMPOLINE_RESTORE_STACK_PROT);
1111 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING);
1112 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_ENTER] = create_trampoline_code (MONO_TRAMPOLINE_MONITOR_ENTER);
1113 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_EXIT] = create_trampoline_code (MONO_TRAMPOLINE_MONITOR_EXIT);
1114 mono_trampoline_code [MONO_TRAMPOLINE_VCALL] = create_trampoline_code (MONO_TRAMPOLINE_VCALL);
1115 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1116 mono_trampoline_code [MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD] = create_trampoline_code (MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD);
1117 mono_create_handler_block_trampoline ();
1120 mono_counters_register ("Calls to trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &trampoline_calls);
1121 mono_counters_register ("JIT trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &jit_trampolines);
1122 mono_counters_register ("Unbox trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &unbox_trampolines);
1123 mono_counters_register ("Static rgctx trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &static_rgctx_trampolines);
1127 mono_trampolines_cleanup (void)
1129 if (class_init_hash_addr)
1130 g_hash_table_destroy (class_init_hash_addr);
1131 if (rgctx_lazy_fetch_trampoline_hash)
1132 g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash);
1133 if (rgctx_lazy_fetch_trampoline_hash_addr)
1134 g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash_addr);
1136 DeleteCriticalSection (&trampolines_mutex);
1140 mono_get_trampoline_code (MonoTrampolineType tramp_type)
1142 g_assert (mono_trampoline_code [tramp_type]);
1144 return mono_trampoline_code [tramp_type];
1148 mono_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
1151 return mono_aot_create_specific_trampoline (mono_defaults.corlib, arg1, tramp_type, domain, code_len);
1153 return mono_arch_create_specific_trampoline (arg1, tramp_type, domain, code_len);
1157 mono_create_class_init_trampoline (MonoVTable *vtable)
1160 MonoDomain *domain = vtable->domain;
1162 g_assert (!vtable->klass->generic_container);
1164 /* previously created trampoline code */
1165 mono_domain_lock (domain);
1167 g_hash_table_lookup (domain_jit_info (domain)->class_init_trampoline_hash,
1169 mono_domain_unlock (domain);
1173 code = mono_create_specific_trampoline (vtable, MONO_TRAMPOLINE_CLASS_INIT, domain, NULL);
1175 ptr = mono_create_ftnptr (domain, code);
1177 /* store trampoline address */
1178 mono_domain_lock (domain);
1179 g_hash_table_insert (domain_jit_info (domain)->class_init_trampoline_hash,
1181 mono_domain_unlock (domain);
1183 mono_trampolines_lock ();
1184 if (!class_init_hash_addr)
1185 class_init_hash_addr = g_hash_table_new (NULL, NULL);
1186 g_hash_table_insert (class_init_hash_addr, ptr, vtable);
1187 mono_trampolines_unlock ();
1193 mono_create_generic_class_init_trampoline (void)
1195 #ifdef MONO_ARCH_VTABLE_REG
1196 static gpointer code;
1197 MonoTrampInfo *info;
1199 mono_trampolines_lock ();
1203 /* get_named_code () might return an ftnptr, but our caller expects a direct pointer */
1204 code = mono_get_addr_from_ftnptr (mono_aot_get_trampoline ("generic_class_init_trampoline"));
1206 code = mono_arch_create_generic_class_init_trampoline (&info, FALSE);
1209 mono_save_trampoline_xdebug_info (info);
1210 if (mono_jit_map_is_enabled ())
1211 mono_emit_jit_tramp (info->code, info->code_size, info->name);
1212 mono_tramp_info_free (info);
1217 mono_trampolines_unlock ();
1221 g_assert_not_reached ();
1226 mono_create_jump_trampoline (MonoDomain *domain, MonoMethod *method, gboolean add_sync_wrapper)
1230 guint32 code_size = 0;
1232 code = mono_jit_find_compiled_method_with_jit_info (domain, method, &ji);
1234 * We cannot recover the correct type of a shared generic
1235 * method from its native code address, so we use the
1236 * trampoline instead.
1238 if (code && !ji->has_generic_jit_info)
1241 mono_domain_lock (domain);
1242 code = g_hash_table_lookup (domain_jit_info (domain)->jump_trampoline_hash, method);
1243 mono_domain_unlock (domain);
1247 code = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JUMP, mono_domain_get (), &code_size);
1248 g_assert (code_size);
1250 ji = mono_domain_alloc0 (domain, MONO_SIZEOF_JIT_INFO);
1251 ji->code_start = code;
1252 ji->code_size = code_size;
1253 ji->method = method;
1256 * mono_delegate_ctor needs to find the method metadata from the
1257 * trampoline address, so we save it here.
1260 mono_jit_info_table_add (domain, ji);
1262 mono_domain_lock (domain);
1263 g_hash_table_insert (domain_jit_info (domain)->jump_trampoline_hash, method, ji->code_start);
1264 mono_domain_unlock (domain);
1266 return ji->code_start;
1270 mono_create_jit_trampoline_in_domain (MonoDomain *domain, MonoMethod *method)
1274 if (mono_aot_only) {
1275 /* Avoid creating trampolines if possible */
1276 gpointer code = mono_jit_find_compiled_method (domain, method);
1282 mono_domain_lock (domain);
1283 tramp = g_hash_table_lookup (domain_jit_info (domain)->jit_trampoline_hash, method);
1284 mono_domain_unlock (domain);
1288 tramp = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JIT, domain, NULL);
1290 mono_domain_lock (domain);
1291 g_hash_table_insert (domain_jit_info (domain)->jit_trampoline_hash, method, tramp);
1292 mono_domain_unlock (domain);
1300 mono_create_jit_trampoline (MonoMethod *method)
1302 return mono_create_jit_trampoline_in_domain (mono_domain_get (), method);
1306 mono_create_jit_trampoline_from_token (MonoImage *image, guint32 token)
1310 MonoDomain *domain = mono_domain_get ();
1311 guint8 *buf, *start;
1313 buf = start = mono_domain_code_reserve (domain, 2 * sizeof (gpointer));
1315 *(gpointer*)(gpointer)buf = image;
1316 buf += sizeof (gpointer);
1317 *(guint32*)(gpointer)buf = token;
1319 tramp = mono_create_specific_trampoline (start, MONO_TRAMPOLINE_AOT, domain, NULL);
1327 mono_create_delegate_trampoline (MonoClass *klass)
1329 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1330 MonoDomain *domain = mono_domain_get ();
1332 guint32 code_size = 0;
1333 gpointer *tramp_data;
1336 mono_domain_lock (domain);
1337 ptr = g_hash_table_lookup (domain_jit_info (domain)->delegate_trampoline_hash, klass);
1338 mono_domain_unlock (domain);
1342 // Precompute the delegate invoke impl and pass it to the delegate trampoline
1343 invoke = mono_get_delegate_invoke (klass);
1346 tramp_data = mono_domain_alloc (domain, sizeof (gpointer) * 3);
1347 tramp_data [0] = invoke;
1348 tramp_data [1] = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), TRUE);
1349 tramp_data [2] = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), FALSE);
1351 ptr = mono_create_specific_trampoline (tramp_data, MONO_TRAMPOLINE_DELEGATE, mono_domain_get (), &code_size);
1352 g_assert (code_size);
1354 /* store trampoline address */
1355 mono_domain_lock (domain);
1356 g_hash_table_insert (domain_jit_info (domain)->delegate_trampoline_hash,
1358 mono_domain_unlock (domain);
1367 mono_create_rgctx_lazy_fetch_trampoline (guint32 offset)
1369 static gboolean inited = FALSE;
1370 static int num_trampolines = 0;
1371 MonoTrampInfo *info;
1373 gpointer tramp, ptr;
1376 return mono_aot_get_lazy_fetch_trampoline (offset);
1378 mono_trampolines_lock ();
1379 if (rgctx_lazy_fetch_trampoline_hash)
1380 tramp = g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset));
1383 mono_trampolines_unlock ();
1387 tramp = mono_arch_create_rgctx_lazy_fetch_trampoline (offset, &info, FALSE);
1389 mono_save_trampoline_xdebug_info (info);
1390 if (mono_jit_map_is_enabled ())
1391 mono_emit_jit_tramp (info->code, info->code_size, info->name);
1392 mono_tramp_info_free (info);
1394 ptr = mono_create_ftnptr (mono_get_root_domain (), tramp);
1396 mono_trampolines_lock ();
1397 if (!rgctx_lazy_fetch_trampoline_hash) {
1398 rgctx_lazy_fetch_trampoline_hash = g_hash_table_new (NULL, NULL);
1399 rgctx_lazy_fetch_trampoline_hash_addr = g_hash_table_new (NULL, NULL);
1401 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset), ptr);
1402 g_assert (offset != -1);
1403 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash_addr, ptr, GUINT_TO_POINTER (offset + 1));
1404 mono_trampolines_unlock ();
1407 mono_counters_register ("RGCTX num lazy fetch trampolines",
1408 MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_trampolines);
1417 mono_create_monitor_enter_trampoline (void)
1419 static gpointer code;
1420 MonoTrampInfo *info;
1422 if (mono_aot_only) {
1424 code = mono_aot_get_trampoline ("monitor_enter_trampoline");
1428 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
1429 mono_trampolines_lock ();
1432 code = mono_arch_create_monitor_enter_trampoline (&info, FALSE);
1434 mono_save_trampoline_xdebug_info (info);
1435 if (mono_jit_map_is_enabled ())
1436 mono_emit_jit_tramp (info->code, info->code_size, info->name);
1437 mono_tramp_info_free (info);
1441 mono_trampolines_unlock ();
1444 g_assert_not_reached ();
1451 mono_create_monitor_exit_trampoline (void)
1453 static gpointer code;
1454 MonoTrampInfo *info;
1456 if (mono_aot_only) {
1458 code = mono_aot_get_trampoline ("monitor_exit_trampoline");
1462 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
1463 mono_trampolines_lock ();
1466 code = mono_arch_create_monitor_exit_trampoline (&info, FALSE);
1468 mono_save_trampoline_xdebug_info (info);
1469 if (mono_jit_map_is_enabled ())
1470 mono_emit_jit_tramp (info->code, info->code_size, info->name);
1471 mono_tramp_info_free (info);
1475 mono_trampolines_unlock ();
1478 g_assert_not_reached ();
1483 #ifdef MONO_ARCH_LLVM_SUPPORTED
1485 * mono_create_llvm_imt_trampoline:
1487 * LLVM compiled code can't pass in the IMT argument, so we use this trampoline, which
1488 * sets the IMT argument, then branches to the contents of the vtable slot given by
1489 * vt_offset in the vtable which is obtained from the argument list.
1492 mono_create_llvm_imt_trampoline (MonoDomain *domain, MonoMethod *m, int vt_offset)
1494 #ifdef MONO_ARCH_HAVE_LLVM_IMT_TRAMPOLINE
1495 return mono_arch_get_llvm_imt_trampoline (domain, m, vt_offset);
1497 g_assert_not_reached ();
1504 mono_find_class_init_trampoline_by_addr (gconstpointer addr)
1508 mono_trampolines_lock ();
1509 if (class_init_hash_addr)
1510 res = g_hash_table_lookup (class_init_hash_addr, addr);
1513 mono_trampolines_unlock ();
1518 mono_find_rgctx_lazy_fetch_trampoline_by_addr (gconstpointer addr)
1522 mono_trampolines_lock ();
1523 if (rgctx_lazy_fetch_trampoline_hash_addr) {
1524 /* We store the real offset + 1 so we can detect when the lookup fails */
1525 offset = GPOINTER_TO_INT (g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash_addr, addr));
1533 mono_trampolines_unlock ();
1537 static const char*tramp_names [MONO_TRAMPOLINE_NUM] = {
1541 "generic_class_init",
1546 "restore_stack_prot",
1547 "generic_virtual_remoting",
1551 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1552 "handler_block_guard"
1557 * mono_get_generic_trampoline_name:
1559 * Returns a pointer to malloc-ed memory.
1562 mono_get_generic_trampoline_name (MonoTrampolineType tramp_type)
1564 return g_strdup_printf ("generic_trampoline_%s", tramp_names [tramp_type]);
1568 * mono_get_rgctx_fetch_trampoline_name:
1570 * Returns a pointer to malloc-ed memory.
1573 mono_get_rgctx_fetch_trampoline_name (int slot)
1578 mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
1579 index = MONO_RGCTX_SLOT_INDEX (slot);
1581 return g_strdup_printf ("rgctx_fetch_trampoline_%s_%d", mrgctx ? "mrgctx" : "rgctx", index);