2 * (C) 2003 Ximian, Inc.
3 * (C) 2003-2011 Novell, Inc.
4 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
9 #include <mono/metadata/appdomain.h>
10 #include <mono/metadata/metadata-internals.h>
11 #include <mono/metadata/marshal.h>
12 #include <mono/metadata/tabledefs.h>
13 #include <mono/utils/mono-counters.h>
14 #include <mono/utils/mono-error-internals.h>
15 #include <mono/utils/mono-membar.h>
16 #include <mono/utils/mono-compiler.h>
21 * Address of the trampoline code. This is used by the debugger to check
22 * whether a method is a trampoline.
24 guint8* mono_trampoline_code [MONO_TRAMPOLINE_NUM];
26 static GHashTable *rgctx_lazy_fetch_trampoline_hash;
27 static GHashTable *rgctx_lazy_fetch_trampoline_hash_addr;
28 static guint32 trampoline_calls, jit_trampolines, unbox_trampolines, static_rgctx_trampolines;
30 #define mono_trampolines_lock() mono_mutex_lock (&trampolines_mutex)
31 #define mono_trampolines_unlock() mono_mutex_unlock (&trampolines_mutex)
32 static mono_mutex_t trampolines_mutex;
34 #ifdef MONO_ARCH_GSHARED_SUPPORTED
42 rgctx_tramp_info_equal (gconstpointer ka, gconstpointer kb)
44 const RgctxTrampInfo *i1 = ka;
45 const RgctxTrampInfo *i2 = kb;
47 if (i1->m == i2->m && i1->addr == i2->addr)
54 rgctx_tramp_info_hash (gconstpointer data)
56 const RgctxTrampInfo *info = data;
58 return GPOINTER_TO_UINT (info->m) ^ GPOINTER_TO_UINT (info->addr);
62 * mono_create_static_rgctx_trampoline:
63 * @m: the mono method to create a trampoline for
64 * @addr: the address to jump to (where the compiled code for M lives)
66 * Creates a static rgctx trampoline for M which branches to ADDR which should
67 * point to the compiled code of M.
69 * Static rgctx trampolines are used when a shared generic method which doesn't
70 * have a this argument is called indirectly, ie. from code which can't pass in
71 * the rgctx argument. The trampoline sets the rgctx argument and jumps to the
72 * methods code. These trampolines are similar to the unbox trampolines, they
73 * perform the same task as the static rgctx wrappers, but they are smaller/faster,
74 * and can be made to work with full AOT.
76 * On PPC addr should be an ftnptr and the return value is an ftnptr too.
78 * Returns the generated static rgctx trampoline.
81 mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr)
86 RgctxTrampInfo tmp_info;
89 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
90 g_assert (((gpointer*)addr) [2] == 0);
93 ctx = mini_method_get_rgctx (m);
95 domain = mono_domain_get ();
98 * In the AOT case, addr might point to either the method, or to an unbox trampoline,
99 * so make the hash keyed on the m+addr pair.
101 mono_domain_lock (domain);
102 if (!domain_jit_info (domain)->static_rgctx_trampoline_hash)
103 domain_jit_info (domain)->static_rgctx_trampoline_hash = g_hash_table_new (rgctx_tramp_info_hash, rgctx_tramp_info_equal);
105 tmp_info.addr = addr;
106 res = g_hash_table_lookup (domain_jit_info (domain)->static_rgctx_trampoline_hash,
108 mono_domain_unlock (domain);
113 res = mono_aot_get_static_rgctx_trampoline (ctx, addr);
115 res = mono_arch_get_static_rgctx_trampoline (m, ctx, addr);
117 mono_domain_lock (domain);
118 /* Duplicates inserted while we didn't hold the lock are OK */
119 info = mono_domain_alloc (domain, sizeof (RgctxTrampInfo));
122 g_hash_table_insert (domain_jit_info (domain)->static_rgctx_trampoline_hash, info, res);
123 mono_domain_unlock (domain);
125 static_rgctx_trampolines ++;
131 mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr)
134 * This shouldn't happen as all arches which support generic sharing support
135 * static rgctx trampolines as well.
137 g_assert_not_reached ();
142 #define DEBUG_IMT(stmt) do { stmt; } while (0)
144 #define DEBUG_IMT(stmt) do { } while (0)
148 * mini_resolve_imt_method:
150 * Resolve the actual method called when making an IMT call through VTABLE_SLOT with IMT_METHOD as the interface method.
152 * Either IMPL_METHOD or OUT_AOT_ADDR will be set on return.
155 mini_resolve_imt_method (MonoVTable *vt, gpointer *vtable_slot, MonoMethod *imt_method, MonoMethod **impl_method, gpointer *out_aot_addr, gboolean *out_need_rgctx_tramp, MonoMethod **variant_iface)
157 MonoMethod *impl = NULL, *generic_virtual = NULL;
158 gboolean lookup_aot, variance_used = FALSE, need_rgctx_tramp = FALSE;
160 guint8 *aot_addr = NULL;
161 int displacement = vtable_slot - ((gpointer*)vt);
162 int interface_offset;
163 int imt_slot = MONO_IMT_SIZE + displacement;
165 g_assert (imt_slot < MONO_IMT_SIZE);
167 /* This has to be variance aware since imt_method can be from an interface that vt->klass doesn't directly implement */
168 interface_offset = mono_class_interface_offset_with_variance (vt->klass, imt_method->klass, &variance_used);
169 if (interface_offset < 0)
170 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));
172 *variant_iface = NULL;
173 if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) {
174 /* Generic virtual method */
175 generic_virtual = imt_method;
176 need_rgctx_tramp = TRUE;
177 } else if (variance_used && mono_class_has_variant_generic_params (imt_method->klass)) {
178 *variant_iface = imt_method;
182 /* We can only use the AOT compiled code if we don't require further processing */
183 lookup_aot = !generic_virtual & !variant_iface;
185 mono_vtable_build_imt_slot (vt, mono_method_get_imt_slot (imt_method));
187 if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) {
189 MonoGenericContext context = { NULL, NULL };
192 * Generic virtual method, imt_method contains the inflated interface
193 * method, need to get the inflated impl method.
195 /* imt_method->slot might not be set */
196 impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_declaring_generic_method (imt_method)->slot);
198 if (impl->klass->generic_class)
199 context.class_inst = impl->klass->generic_class->context.class_inst;
200 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
201 impl = mono_class_inflate_generic_method_checked (impl, &context, &error);
202 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */
204 /* Avoid loading metadata or creating a generic vtable if possible */
205 if (lookup_aot && !vt->klass->valuetype)
206 aot_addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, interface_offset + mono_method_get_vtable_slot (imt_method));
212 impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_vtable_slot (imt_method));
215 if (impl && mono_method_needs_static_rgctx_invoke (impl, FALSE))
216 need_rgctx_tramp = TRUE;
217 if (impl && impl->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED) {
218 WrapperInfo *info = mono_marshal_get_wrapper_info (impl);
220 if (info && info->subtype == WRAPPER_SUBTYPE_GENERIC_ARRAY_HELPER)
221 need_rgctx_tramp = TRUE;
224 *out_need_rgctx_tramp = need_rgctx_tramp;
225 *out_aot_addr = aot_addr;
227 DEBUG_IMT (printf ("mono_convert_imt_slot_to_vtable_slot: method = %s.%s.%s, imt_method = %s.%s.%s\n",
228 method->klass->name_space, method->klass->name, method->name,
229 imt_method->klass->name_space, imt_method->klass->name, imt_method->name));
231 if (vt->imt_collisions_bitmap & (1 << imt_slot)) {
232 int slot = mono_method_get_vtable_index (imt_method);
235 g_assert (slot != -1);
236 vtable_offset = interface_offset + slot;
237 vtable_slot = & (vt->vtable [vtable_offset]);
238 DEBUG_IMT (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));
241 DEBUG_IMT (printf ("mono_convert_imt_slot_to_vtable_slot: slot %p[%d] is in the IMT, but not colliding\n", slot, imt_slot));
247 * This is a super-ugly hack to fix bug #616463.
249 * The problem is that we don't always set is_generic for generic
250 * method definitions. See the comment at the end of
251 * mono_class_inflate_generic_method_full_checked() in class.c.
254 is_generic_method_definition (MonoMethod *m)
256 MonoGenericContext *context;
262 context = mono_method_get_context (m);
263 if (!context->method_inst)
265 if (context->method_inst == mono_method_get_generic_container (((MonoMethodInflated*)m)->declaring)->context.method_inst)
271 mini_jit_info_is_gsharedvt (MonoJitInfo *ji)
273 if (ji && ji->has_generic_jit_info && (mono_jit_info_get_generic_sharing_context (ji)->is_gsharedvt))
280 * mini_add_method_trampoline:
283 * @add_static_rgctx_tramp: adds a static rgctx trampoline
284 * @add_unbox_tramp: adds an unboxing trampoline
286 * Add static rgctx/gsharedvt_in/unbox trampolines to
287 * M/COMPILED_METHOD if needed.
289 * Returns the trampoline address, or COMPILED_METHOD if no trampoline
293 mini_add_method_trampoline (MonoMethod *m, gpointer compiled_method, gboolean add_static_rgctx_tramp, gboolean add_unbox_tramp)
295 gpointer addr = compiled_method;
296 gboolean callee_gsharedvt, callee_array_helper;
297 MonoMethod *jmethod = NULL;
300 // FIXME: This loads information from AOT (perf problem)
301 ji = mini_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method), NULL);
302 callee_gsharedvt = mini_jit_info_is_gsharedvt (ji);
304 callee_array_helper = FALSE;
305 if (m->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED) {
306 WrapperInfo *info = mono_marshal_get_wrapper_info (m);
309 * generic array helpers.
310 * Have to replace the wrappers with the original generic instances.
312 if (info && info->subtype == WRAPPER_SUBTYPE_GENERIC_ARRAY_HELPER) {
313 callee_array_helper = TRUE;
314 m = info->d.generic_array_helper.method;
316 } else if (m->wrapper_type == MONO_WRAPPER_UNKNOWN) {
317 WrapperInfo *info = mono_marshal_get_wrapper_info (m);
319 /* Same for synchronized inner wrappers */
320 if (info && info->subtype == WRAPPER_SUBTYPE_SYNCHRONIZED_INNER) {
321 m = info->d.synchronized_inner.method;
325 if (callee_gsharedvt)
326 g_assert (m->is_inflated);
328 addr = compiled_method;
330 if (add_unbox_tramp) {
332 * The unbox trampolines call the method directly, so need to add
333 * an rgctx tramp before them.
336 addr = mono_aot_get_unbox_trampoline (m);
338 unbox_trampolines ++;
339 addr = mono_arch_get_unbox_trampoline (m, addr);
343 if (ji && !ji->is_trampoline)
344 jmethod = jinfo_get_method (ji);
345 if (callee_gsharedvt && mini_is_gsharedvt_variable_signature (mono_method_signature (jmethod))) {
346 MonoMethodSignature *sig, *gsig;
348 /* Here m is a generic instance, while ji->method is the gsharedvt method implementing it */
350 /* Call from normal/gshared code to gsharedvt code with variable signature */
351 sig = mono_method_signature (m);
352 gsig = mono_method_signature (jmethod);
354 addr = mini_get_gsharedvt_wrapper (TRUE, addr, sig, gsig, -1, FALSE);
356 //printf ("IN: %s\n", mono_method_full_name (m, TRUE));
359 if (callee_array_helper) {
360 add_static_rgctx_tramp = FALSE;
361 /* FIXME: ji->from_aot is not set for llvm methods */
362 if (ji && (ji->from_aot || mono_aot_only)) {
363 /* In AOT mode, compiled_method points to one of the InternalArray methods in Array. */
364 if (mono_method_needs_static_rgctx_invoke (jinfo_get_method (ji), TRUE))
365 add_static_rgctx_tramp = TRUE;
369 if (add_static_rgctx_tramp)
370 addr = mono_create_static_rgctx_trampoline (m, addr);
376 * common_call_trampoline:
378 * The code to handle normal, virtual, and interface method calls and jumps, both
379 * from JITted and LLVM compiled code.
382 common_call_trampoline_inner (mgreg_t *regs, guint8 *code, MonoMethod *m, MonoVTable *vt, gpointer *vtable_slot)
384 gpointer addr, compiled_method;
385 gboolean generic_shared = FALSE;
386 gboolean need_unbox_tramp = FALSE;
387 gboolean need_rgctx_tramp = FALSE;
388 MonoMethod *declaring = NULL;
389 MonoMethod *generic_virtual = NULL, *variant_iface = NULL;
391 gboolean imt_call, virtual;
392 gpointer *orig_vtable_slot, *vtable_slot_to_patch = NULL;
393 MonoJitInfo *ji = NULL;
395 virtual = vt && (gpointer)vtable_slot > (gpointer)vt;
396 imt_call = vt && (gpointer)vtable_slot < (gpointer)vt;
399 * rgctx trampolines are needed when the call is indirect so the caller can't pass
400 * the rgctx argument needed by the callee.
403 need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (m, FALSE);
405 orig_vtable_slot = vtable_slot;
406 vtable_slot_to_patch = vtable_slot;
410 MonoMethod *imt_method = NULL, *impl_method = NULL;
411 MonoObject *this_arg;
413 g_assert (vtable_slot);
415 imt_method = mono_arch_find_imt_method (regs, code);
416 this_arg = mono_arch_get_this_arg_from_call (regs, code);
418 if (mono_object_is_transparent_proxy (this_arg)) {
419 /* Use the slow path for now */
420 m = mono_object_get_virtual_method (this_arg, imt_method);
421 vtable_slot_to_patch = NULL;
423 if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) {
424 /* Generic virtual method */
425 generic_virtual = imt_method;
426 need_rgctx_tramp = TRUE;
429 vtable_slot = mini_resolve_imt_method (vt, vtable_slot, imt_method, &impl_method, &addr, &need_rgctx_tramp, &variant_iface);
430 /* This is the vcall slot which gets called through the IMT thunk */
431 vtable_slot_to_patch = vtable_slot;
435 * We found AOT compiled code for the method, skip the rest.
437 if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
440 return mono_create_ftnptr (mono_domain_get (), addr);
448 * The virtual check is needed because is_generic_method_definition (m) could
449 * return TRUE for methods used in IMT calls too.
451 if (virtual && is_generic_method_definition (m)) {
453 MonoGenericContext context = { NULL, NULL };
454 MonoMethod *declaring;
457 declaring = mono_method_get_declaring_generic_method (m);
461 if (m->klass->generic_class)
462 context.class_inst = m->klass->generic_class->context.class_inst;
464 g_assert (!m->klass->generic_container);
466 generic_virtual = mono_arch_find_imt_method (regs, code);
467 g_assert (generic_virtual);
468 g_assert (generic_virtual->is_inflated);
469 context.method_inst = ((MonoMethodInflated*)generic_virtual)->context.method_inst;
471 m = mono_class_inflate_generic_method_checked (declaring, &context, &error);
472 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */
473 /* FIXME: only do this if the method is sharable */
474 need_rgctx_tramp = TRUE;
475 } else if ((context_used = mono_method_check_context_used (m))) {
476 MonoClass *klass = NULL;
477 MonoMethod *actual_method = NULL;
478 MonoVTable *vt = NULL;
479 MonoGenericInst *method_inst = NULL;
482 generic_shared = TRUE;
487 * The caller is gshared code, compute the actual method to call from M and this/rgctx.
489 if (m->is_inflated && mono_method_get_context (m)->method_inst) {
490 MonoMethodRuntimeGenericContext *mrgctx = (MonoMethodRuntimeGenericContext*)mono_arch_find_static_call_vtable (regs, code);
492 klass = mrgctx->class_vtable->klass;
493 method_inst = mrgctx->method_inst;
494 } else if ((m->flags & METHOD_ATTRIBUTE_STATIC) || m->klass->valuetype) {
495 MonoVTable *vtable = mono_arch_find_static_call_vtable (regs, code);
497 klass = vtable->klass;
499 MonoObject *this_argument = mono_arch_get_this_arg_from_call (regs, code);
501 vt = this_argument->vtable;
502 vtable_slot = orig_vtable_slot;
504 g_assert (this_argument->vtable->klass->inited);
507 mono_class_setup_supertypes (this_argument->vtable->klass);
508 klass = this_argument->vtable->klass->supertypes [m->klass->idepth - 1];
512 g_assert (vtable_slot || klass);
515 int displacement = vtable_slot - ((gpointer*)vt);
517 g_assert_not_reached ();
519 g_assert (displacement > 0);
521 actual_method = vt->klass->vtable [displacement];
524 if (method_inst || m->wrapper_type) {
526 MonoGenericContext context = { NULL, NULL };
529 declaring = mono_method_get_declaring_generic_method (m);
533 if (klass->generic_class)
534 context.class_inst = klass->generic_class->context.class_inst;
535 else if (klass->generic_container)
536 context.class_inst = klass->generic_container->context.class_inst;
537 context.method_inst = method_inst;
539 actual_method = mono_class_inflate_generic_method_checked (declaring, &context, &error);
540 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */
542 actual_method = mono_class_get_method_generic (klass, m);
546 g_assert (actual_method);
547 g_assert (actual_method->klass == klass);
549 if (actual_method->is_inflated)
550 declaring = mono_method_get_declaring_generic_method (actual_method);
557 if (m->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) {
558 m = mono_marshal_get_synchronized_wrapper (m);
559 need_rgctx_tramp = FALSE;
562 /* Calls made through delegates on platforms without delegate trampolines */
563 if (!code && mono_method_needs_static_rgctx_invoke (m, FALSE))
564 need_rgctx_tramp = TRUE;
566 addr = compiled_method = mono_compile_method (m);
569 if (generic_virtual || variant_iface) {
570 if (vt->klass->valuetype) /*FIXME is this required variant iface?*/
571 need_unbox_tramp = TRUE;
572 } else if (orig_vtable_slot) {
573 if (m->klass->valuetype)
574 need_unbox_tramp = TRUE;
577 addr = mini_add_method_trampoline (m, compiled_method, need_rgctx_tramp, need_unbox_tramp);
579 if (generic_virtual || variant_iface) {
580 MonoMethod *target = generic_virtual ? generic_virtual : variant_iface;
582 vtable_slot = orig_vtable_slot;
583 g_assert (vtable_slot);
585 mono_method_add_generic_virtual_invocation (mono_domain_get (),
592 /* the method was jumped to */
594 MonoDomain *domain = mono_domain_get ();
596 /* Patch the got entries pointing to this method */
598 * We do this here instead of in mono_codegen () to cover the case when m
599 * was loaded from an aot image.
601 if (domain_jit_info (domain)->jump_target_got_slot_hash) {
604 mono_domain_lock (domain);
605 list = g_hash_table_lookup (domain_jit_info (domain)->jump_target_got_slot_hash, m);
607 for (tmp = list; tmp; tmp = tmp->next) {
608 gpointer *got_slot = tmp->data;
611 g_hash_table_remove (domain_jit_info (domain)->jump_target_got_slot_hash, m);
614 mono_domain_unlock (domain);
620 vtable_slot = orig_vtable_slot;
623 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))) {
624 g_assert (*vtable_slot_to_patch);
625 *vtable_slot_to_patch = mono_get_addr_from_ftnptr (addr);
628 guint8 *plt_entry = mono_aot_get_plt_entry (code);
629 gboolean no_patch = FALSE;
630 MonoJitInfo *target_ji;
633 if (generic_shared) {
635 mini_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method), NULL);
637 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
639 if (ji && target_ji && generic_shared && ji->has_generic_jit_info && !target_ji->has_generic_jit_info) {
644 mono_aot_patch_plt_entry (code, plt_entry, NULL, regs, addr);
646 if (generic_shared) {
647 if (m->wrapper_type != MONO_WRAPPER_NONE)
648 m = mono_marshal_method_from_wrapper (m);
649 //g_assert (mono_method_is_generic_sharable (m, FALSE));
652 /* Patch calling code */
654 mini_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method), NULL);
656 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
658 if (ji && target_ji && generic_shared && ji->has_generic_jit_info && !target_ji->has_generic_jit_info) {
660 * Can't patch the call as the caller is gshared, but the callee is not. Happens when
661 * generic sharing fails.
662 * FIXME: Performance problem.
667 if (!no_patch && mono_method_same_domain (ji, target_ji))
668 mono_arch_patch_callsite (ji->code_start, code, addr);
676 common_call_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, MonoVTable *vt, gpointer *vtable_slot)
679 MONO_PREPARE_RESET_BLOCKING;
680 res = common_call_trampoline_inner (regs, code, m, vt, vtable_slot);
681 MONO_FINISH_RESET_BLOCKING;
686 * mono_magic_trampoline:
688 * This trampoline handles normal calls from JITted code.
691 mono_magic_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp)
695 return common_call_trampoline (regs, code, arg, NULL, NULL);
699 * mono_vcall_trampoline:
701 * This trampoline handles virtual calls.
704 mono_vcall_trampoline (mgreg_t *regs, guint8 *code, int slot, guint8 *tramp)
706 MonoObject *this_arg;
708 gpointer *vtable_slot;
715 * We need to obtain the following pieces of information:
716 * - the method which needs to be compiled.
718 * We use one vtable trampoline per vtable slot index, so we need only the vtable,
719 * the other two can be computed from the vtable + the slot index.
723 * Obtain the vtable from the 'this' arg.
725 this_arg = mono_arch_get_this_arg_from_call (regs, code);
728 vt = this_arg->vtable;
731 /* Normal virtual call */
732 vtable_slot = &(vt->vtable [slot]);
734 /* Avoid loading metadata or creating a generic vtable if possible */
735 addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, slot);
736 if (addr && !vt->klass->valuetype) {
737 if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
740 return mono_create_ftnptr (mono_domain_get (), addr);
745 * is_generic_method_definition() above) also
746 * goes away if we do a
747 * mono_class_setup_vtable (vt->klass) here,
748 * because we then inflate the method
749 * correctly, put it in the cache, and the
750 * "wrong" inflation invocation still looks up
751 * the correctly inflated method.
753 * The hack above seems more stable and
756 m = mono_class_get_vtable_entry (vt->klass, slot);
759 vtable_slot = &(((gpointer*)vt) [slot]);
764 return common_call_trampoline (regs, code, m, vt, vtable_slot);
767 #ifndef DISABLE_REMOTING
769 mono_generic_virtual_remoting_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8 *tramp)
772 MonoGenericContext context = { NULL, NULL };
773 MonoMethod *imt_method, *declaring;
778 g_assert (m->is_generic);
781 declaring = mono_method_get_declaring_generic_method (m);
785 if (m->klass->generic_class)
786 context.class_inst = m->klass->generic_class->context.class_inst;
788 g_assert (!m->klass->generic_container);
790 imt_method = mono_arch_find_imt_method (regs, code);
791 if (imt_method->is_inflated)
792 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
793 m = mono_class_inflate_generic_method_checked (declaring, &context, &error);
794 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */;
795 m = mono_marshal_get_remoting_invoke_with_check (m);
797 addr = mono_compile_method (m);
805 * mono_aot_trampoline:
807 * This trampoline handles calls made from AOT code. We try to bypass the
808 * normal JIT compilation logic to avoid loading the metadata for the method.
810 #ifdef MONO_ARCH_AOT_SUPPORTED
812 mono_aot_trampoline (mgreg_t *regs, guint8 *code, guint8 *token_info,
817 MonoMethod *method = NULL;
823 image = *(gpointer*)(gpointer)token_info;
824 token_info += sizeof (gpointer);
825 token = *(guint32*)(gpointer)token_info;
827 addr = mono_aot_get_method_from_token (mono_domain_get (), image, token);
829 method = mono_get_method (image, token, NULL);
832 /* Use the generic code */
833 return mono_magic_trampoline (regs, code, method, tramp);
836 addr = mono_create_ftnptr (mono_domain_get (), addr);
838 /* This is a normal call through a PLT entry */
839 plt_entry = mono_aot_get_plt_entry (code);
840 g_assert (plt_entry);
842 mono_aot_patch_plt_entry (code, plt_entry, NULL, regs, addr);
848 * mono_aot_plt_trampoline:
850 * This trampoline handles calls made from AOT code through the PLT table.
853 mono_aot_plt_trampoline (mgreg_t *regs, guint8 *code, guint8 *aot_module,
856 guint32 plt_info_offset = mono_aot_get_plt_info_offset (regs, code);
861 res = mono_aot_plt_resolve (aot_module, plt_info_offset, code);
863 if (mono_loader_get_last_error ())
864 mono_raise_exception (mono_loader_error_prepare_exception (mono_loader_get_last_error ()));
865 // FIXME: Error handling (how ?)
874 mono_rgctx_lazy_fetch_trampoline (mgreg_t *regs, guint8 *code, gpointer data, guint8 *tramp)
876 static gboolean inited = FALSE;
877 static int num_lookups = 0;
878 guint32 slot = GPOINTER_TO_UINT (data);
879 mgreg_t *r = (mgreg_t*)regs;
880 gpointer arg = (gpointer)(gssize)r [MONO_ARCH_VTABLE_REG];
881 guint32 index = MONO_RGCTX_SLOT_INDEX (slot);
882 gboolean mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
887 mono_counters_register ("RGCTX unmanaged lookups", MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_lookups);
894 return mono_method_fill_runtime_generic_context (arg, index);
896 return mono_class_fill_runtime_generic_context (arg, index);
900 * Precompute data to speed up mono_delegate_trampoline ().
901 * METHOD might be NULL.
903 static MonoDelegateTrampInfo*
904 create_delegate_trampoline_data (MonoDomain *domain, MonoClass *klass, MonoMethod *method)
906 MonoDelegateTrampInfo *tramp_data;
910 // Precompute the delegate invoke impl and pass it to the delegate trampoline
911 invoke = mono_get_delegate_invoke (klass);
914 tramp_data = mono_domain_alloc0 (domain, sizeof (MonoDelegateTrampInfo));
915 tramp_data->invoke = invoke;
916 tramp_data->invoke_sig = mono_method_signature (invoke);
917 tramp_data->impl_this = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), TRUE);
918 tramp_data->impl_nothis = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), FALSE);
919 tramp_data->method = method;
921 mono_error_init (&err);
922 tramp_data->sig = mono_method_signature_checked (method, &err);
923 tramp_data->need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (method, FALSE);
930 * mono_delegate_trampoline:
932 * This trampoline handles calls made to Delegate:Invoke ().
933 * This is called once the first time a delegate is invoked, so it must be fast.
936 mono_delegate_trampoline (mgreg_t *regs, guint8 *code, gpointer *arg, guint8* tramp)
938 MonoDomain *domain = mono_domain_get ();
939 MonoDelegate *delegate;
942 MonoMethod *method = NULL;
943 gboolean multicast, callvirt = FALSE, closed_over_null = FALSE;
944 gboolean need_rgctx_tramp = FALSE;
945 gboolean need_unbox_tramp = FALSE;
946 gboolean enable_caching = TRUE;
947 MonoDelegateTrampInfo *tramp_info = (MonoDelegateTrampInfo*)arg;
948 MonoMethod *invoke = tramp_info->invoke;
949 guint8 *impl_this = tramp_info->impl_this;
950 guint8 *impl_nothis = tramp_info->impl_nothis;
952 MonoMethodSignature *sig;
953 gpointer addr, compiled_method;
954 gboolean is_remote = FALSE;
958 /* Obtain the delegate object according to the calling convention */
959 delegate = mono_arch_get_this_arg_from_call (regs, code);
960 g_assert (mono_class_has_parent (mono_object_class (delegate), mono_defaults.multicastdelegate_class));
962 if (delegate->method) {
963 method = delegate->method;
966 * delegate->method_ptr == NULL means the delegate was initialized by
967 * mini_delegate_ctor, while != NULL means it is initialized by
968 * mono_delegate_ctor_with_method (). In both cases, we need to add wrappers
969 * (ctor_with_method () does this, but it doesn't store the wrapper back into
972 #ifndef DISABLE_REMOTING
973 if (delegate->target && delegate->target->vtable->klass == mono_defaults.transparent_proxy_class) {
976 if (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class != mono_class_get_com_object_class () &&
977 !mono_class_is_com_object (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class))
979 method = mono_marshal_get_remoting_invoke (method);
983 sig = tramp_info->sig;
984 if (!(sig && method == tramp_info->method)) {
985 mono_error_init (&err);
986 sig = mono_method_signature_checked (method, &err);
988 mono_error_raise_exception (&err);
991 if (sig->hasthis && method->klass->valuetype) {
992 gboolean need_unbox = TRUE;
994 if (tramp_info->invoke_sig->param_count > sig->param_count && tramp_info->invoke_sig->params [0]->byref)
999 need_unbox_tramp = TRUE;
1001 method = mono_marshal_get_unbox_wrapper (method);
1005 // If "delegate->method_ptr" is null mono_get_addr_from_ftnptr will fail if
1006 // ftnptrs are being used. "method" would end up null on archtitectures without
1007 // ftnptrs so we can just skip this.
1008 } else if (delegate->method_ptr) {
1009 ji = mono_jit_info_table_find (domain, mono_get_addr_from_ftnptr (delegate->method_ptr));
1011 method = jinfo_get_method (ji);
1015 sig = tramp_info->sig;
1016 if (!(sig && method == tramp_info->method)) {
1017 mono_error_init (&err);
1018 sig = mono_method_signature_checked (method, &err);
1020 mono_error_raise_exception (&err);
1023 callvirt = !delegate->target && sig->hasthis;
1025 closed_over_null = tramp_info->invoke_sig->param_count == sig->param_count;
1027 if (callvirt && !closed_over_null) {
1029 * The delegate needs to make a virtual call to the target method using its
1030 * first argument as the receiver. This is hard to support in full-aot, so
1031 * optimize it in some cases if possible.
1032 * If the target method is not virtual or is in a sealed class,
1033 * the vcall will call it directly.
1034 * If the call doesn't return a valuetype, then the vcall uses the same calling
1035 * convention as a normal call.
1037 if (((method->klass->flags & TYPE_ATTRIBUTE_SEALED) || !(method->flags & METHOD_ATTRIBUTE_VIRTUAL)) && !MONO_TYPE_ISSTRUCT (sig->ret)) {
1039 enable_caching = FALSE;
1043 if (delegate->target &&
1044 method->flags & METHOD_ATTRIBUTE_VIRTUAL &&
1045 method->flags & METHOD_ATTRIBUTE_ABSTRACT &&
1046 method->klass->flags & TYPE_ATTRIBUTE_ABSTRACT) {
1047 method = mono_object_get_virtual_method (delegate->target, method);
1048 enable_caching = FALSE;
1051 if (method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
1052 method = mono_marshal_get_synchronized_wrapper (method);
1054 if (method == tramp_info->method)
1055 need_rgctx_tramp = tramp_info->need_rgctx_tramp;
1056 else if (mono_method_needs_static_rgctx_invoke (method, FALSE))
1057 need_rgctx_tramp = TRUE;
1061 * If the called address is a trampoline, replace it with the compiled method so
1062 * further calls don't have to go through the trampoline.
1064 if (method && !callvirt) {
1065 /* Avoid the overhead of looking up an already compiled method if possible */
1066 if (enable_caching && delegate->method_code && *delegate->method_code) {
1067 delegate->method_ptr = *delegate->method_code;
1069 compiled_method = addr = mono_compile_method (method);
1070 addr = mini_add_method_trampoline (method, compiled_method, need_rgctx_tramp, need_unbox_tramp);
1071 delegate->method_ptr = addr;
1072 if (enable_caching && delegate->method_code)
1073 *delegate->method_code = delegate->method_ptr;
1076 if (need_rgctx_tramp)
1077 delegate->method_ptr = mono_create_static_rgctx_trampoline (method, delegate->method_ptr);
1080 /* Necessary for !code condition to fallback to slow path */
1083 multicast = ((MonoMulticastDelegate*)delegate)->delegates != NULL;
1084 if (!multicast && !callvirt) {
1085 if (method && (method->flags & METHOD_ATTRIBUTE_STATIC) && mono_method_signature (method)->param_count == mono_method_signature (invoke)->param_count + 1)
1086 /* Closed static delegate */
1089 code = delegate->target ? impl_this : impl_nothis;
1093 /* The general, unoptimized case */
1094 m = mono_marshal_get_delegate_invoke (invoke, delegate);
1095 code = mono_compile_method (m);
1096 code = mini_add_method_trampoline (m, code, mono_method_needs_static_rgctx_invoke (m, FALSE), FALSE);
1099 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
1100 if (enable_caching && !callvirt && tramp_info->method) {
1101 tramp_info->method_ptr = delegate->method_ptr;
1102 tramp_info->invoke_impl = delegate->invoke_impl;
1108 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1110 mono_handler_block_guard_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_info, guint8* tramp)
1114 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
1115 gpointer resume_ip = jit_tls->handler_block_return_address;
1117 memcpy (&ctx, &jit_tls->handler_block_context, sizeof (MonoContext));
1118 MONO_CONTEXT_SET_IP (&ctx, jit_tls->handler_block_return_address);
1120 jit_tls->handler_block_return_address = NULL;
1121 jit_tls->handler_block = NULL;
1123 if (!resume_ip) /*this should not happen, but we should avoid crashing */
1124 exc = mono_get_exception_execution_engine ("Invalid internal state, resuming abort after handler block but no resume ip found");
1126 exc = mono_thread_resume_interruption ();
1129 mono_handle_exception (&ctx, exc);
1130 mono_restore_context (&ctx);
1137 mono_create_handler_block_trampoline (void)
1139 static gpointer code;
1141 mono_memory_barrier ();
1145 g_assert (!mono_aot_only);
1147 mono_trampolines_lock ();
1150 MonoTrampInfo *info;
1153 tmp = mono_arch_create_handler_block_trampoline (&info, FALSE);
1154 mono_tramp_info_register (info, NULL);
1155 mono_memory_barrier ();
1158 mono_trampolines_unlock ();
1165 * mono_get_trampoline_func:
1167 * Return the C function which needs to be called by the generic trampoline of type
1171 mono_get_trampoline_func (MonoTrampolineType tramp_type)
1173 switch (tramp_type) {
1174 case MONO_TRAMPOLINE_JIT:
1175 case MONO_TRAMPOLINE_JUMP:
1176 return mono_magic_trampoline;
1177 case MONO_TRAMPOLINE_RGCTX_LAZY_FETCH:
1178 return mono_rgctx_lazy_fetch_trampoline;
1179 #ifdef MONO_ARCH_AOT_SUPPORTED
1180 case MONO_TRAMPOLINE_AOT:
1181 return mono_aot_trampoline;
1182 case MONO_TRAMPOLINE_AOT_PLT:
1183 return mono_aot_plt_trampoline;
1185 case MONO_TRAMPOLINE_DELEGATE:
1186 return mono_delegate_trampoline;
1187 case MONO_TRAMPOLINE_RESTORE_STACK_PROT:
1188 return mono_altstack_restore_prot;
1189 #ifndef DISABLE_REMOTING
1190 case MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING:
1191 return mono_generic_virtual_remoting_trampoline;
1193 case MONO_TRAMPOLINE_VCALL:
1194 return mono_vcall_trampoline;
1195 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1196 case MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD:
1197 return mono_handler_block_guard_trampoline;
1200 g_assert_not_reached ();
1206 create_trampoline_code (MonoTrampolineType tramp_type)
1208 MonoTrampInfo *info;
1211 code = mono_arch_create_generic_trampoline (tramp_type, &info, FALSE);
1212 mono_tramp_info_register (info, NULL);
1218 mono_trampolines_init (void)
1220 mono_mutex_init_recursive (&trampolines_mutex);
1225 mono_trampoline_code [MONO_TRAMPOLINE_JIT] = create_trampoline_code (MONO_TRAMPOLINE_JIT);
1226 mono_trampoline_code [MONO_TRAMPOLINE_JUMP] = create_trampoline_code (MONO_TRAMPOLINE_JUMP);
1227 mono_trampoline_code [MONO_TRAMPOLINE_RGCTX_LAZY_FETCH] = create_trampoline_code (MONO_TRAMPOLINE_RGCTX_LAZY_FETCH);
1228 #ifdef MONO_ARCH_AOT_SUPPORTED
1229 mono_trampoline_code [MONO_TRAMPOLINE_AOT] = create_trampoline_code (MONO_TRAMPOLINE_AOT);
1230 mono_trampoline_code [MONO_TRAMPOLINE_AOT_PLT] = create_trampoline_code (MONO_TRAMPOLINE_AOT_PLT);
1232 mono_trampoline_code [MONO_TRAMPOLINE_DELEGATE] = create_trampoline_code (MONO_TRAMPOLINE_DELEGATE);
1233 mono_trampoline_code [MONO_TRAMPOLINE_RESTORE_STACK_PROT] = create_trampoline_code (MONO_TRAMPOLINE_RESTORE_STACK_PROT);
1234 #ifndef DISABLE_REMOTING
1235 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING);
1237 mono_trampoline_code [MONO_TRAMPOLINE_VCALL] = create_trampoline_code (MONO_TRAMPOLINE_VCALL);
1238 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1239 mono_trampoline_code [MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD] = create_trampoline_code (MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD);
1240 mono_create_handler_block_trampoline ();
1243 mono_counters_register ("Calls to trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &trampoline_calls);
1244 mono_counters_register ("JIT trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &jit_trampolines);
1245 mono_counters_register ("Unbox trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &unbox_trampolines);
1246 mono_counters_register ("Static rgctx trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &static_rgctx_trampolines);
1250 mono_trampolines_cleanup (void)
1252 if (rgctx_lazy_fetch_trampoline_hash)
1253 g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash);
1254 if (rgctx_lazy_fetch_trampoline_hash_addr)
1255 g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash_addr);
1257 mono_mutex_destroy (&trampolines_mutex);
1261 mono_get_trampoline_code (MonoTrampolineType tramp_type)
1263 g_assert (mono_trampoline_code [tramp_type]);
1265 return mono_trampoline_code [tramp_type];
1269 mono_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
1272 return mono_aot_create_specific_trampoline (mono_defaults.corlib, arg1, tramp_type, domain, code_len);
1274 return mono_arch_create_specific_trampoline (arg1, tramp_type, domain, code_len);
1278 mono_create_jump_trampoline (MonoDomain *domain, MonoMethod *method, gboolean add_sync_wrapper)
1282 guint32 code_size = 0;
1284 code = mono_jit_find_compiled_method_with_jit_info (domain, method, &ji);
1286 * We cannot recover the correct type of a shared generic
1287 * method from its native code address, so we use the
1288 * trampoline instead.
1289 * For synchronized methods, the trampoline adds the wrapper.
1291 if (code && !ji->has_generic_jit_info && !(method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED))
1294 mono_domain_lock (domain);
1295 code = g_hash_table_lookup (domain_jit_info (domain)->jump_trampoline_hash, method);
1296 mono_domain_unlock (domain);
1300 code = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JUMP, mono_domain_get (), &code_size);
1301 g_assert (code_size);
1303 ji = mono_domain_alloc0 (domain, MONO_SIZEOF_JIT_INFO);
1304 ji->code_start = code;
1305 ji->code_size = code_size;
1306 ji->d.method = method;
1309 * mono_delegate_ctor needs to find the method metadata from the
1310 * trampoline address, so we save it here.
1313 mono_jit_info_table_add (domain, ji);
1315 mono_domain_lock (domain);
1316 g_hash_table_insert (domain_jit_info (domain)->jump_trampoline_hash, method, ji->code_start);
1317 mono_domain_unlock (domain);
1319 return ji->code_start;
1323 mono_create_jit_trampoline_in_domain (MonoDomain *domain, MonoMethod *method)
1327 if (mono_aot_only) {
1328 /* Avoid creating trampolines if possible */
1329 gpointer code = mono_jit_find_compiled_method (domain, method);
1335 mono_domain_lock (domain);
1336 tramp = g_hash_table_lookup (domain_jit_info (domain)->jit_trampoline_hash, method);
1337 mono_domain_unlock (domain);
1341 tramp = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JIT, domain, NULL);
1343 mono_domain_lock (domain);
1344 g_hash_table_insert (domain_jit_info (domain)->jit_trampoline_hash, method, tramp);
1345 mono_domain_unlock (domain);
1353 mono_create_jit_trampoline (MonoMethod *method)
1355 return mono_create_jit_trampoline_in_domain (mono_domain_get (), method);
1359 mono_create_jit_trampoline_from_token (MonoImage *image, guint32 token)
1363 MonoDomain *domain = mono_domain_get ();
1364 guint8 *buf, *start;
1366 buf = start = mono_domain_alloc0 (domain, 2 * sizeof (gpointer));
1368 *(gpointer*)(gpointer)buf = image;
1369 buf += sizeof (gpointer);
1370 *(guint32*)(gpointer)buf = token;
1372 tramp = mono_create_specific_trampoline (start, MONO_TRAMPOLINE_AOT, domain, NULL);
1381 * mono_create_delegate_trampoline_info:
1383 * Create a delegate trampoline for the KLASS+METHOD pair.
1385 MonoDelegateTrampInfo*
1386 mono_create_delegate_trampoline_info (MonoDomain *domain, MonoClass *klass, MonoMethod *method)
1388 MonoDelegateTrampInfo *tramp_info;
1389 MonoClassMethodPair pair, *dpair;
1390 guint32 code_size = 0;
1393 pair.method = method;
1394 mono_domain_lock (domain);
1395 tramp_info = g_hash_table_lookup (domain_jit_info (domain)->delegate_trampoline_hash, &pair);
1396 mono_domain_unlock (domain);
1400 tramp_info = create_delegate_trampoline_data (domain, klass, method);
1402 tramp_info->invoke_impl = mono_create_specific_trampoline (tramp_info, MONO_TRAMPOLINE_DELEGATE, domain, &code_size);
1403 g_assert (code_size);
1405 dpair = mono_domain_alloc0 (domain, sizeof (MonoClassMethodPair));
1406 memcpy (dpair, &pair, sizeof (MonoClassMethodPair));
1408 /* store trampoline address */
1409 mono_domain_lock (domain);
1410 g_hash_table_insert (domain_jit_info (domain)->delegate_trampoline_hash, dpair, tramp_info);
1411 mono_domain_unlock (domain);
1417 mono_create_delegate_trampoline (MonoDomain *domain, MonoClass *klass)
1419 return mono_create_delegate_trampoline_info (domain, klass, NULL)->invoke_impl;
1423 mono_create_delegate_virtual_trampoline (MonoDomain *domain, MonoClass *klass, MonoMethod *method)
1425 MonoMethod *invoke = mono_get_delegate_invoke (klass);
1428 return mono_get_delegate_virtual_invoke_impl (mono_method_signature (invoke), method);
1432 mono_create_rgctx_lazy_fetch_trampoline (guint32 offset)
1434 static gboolean inited = FALSE;
1435 static int num_trampolines = 0;
1436 MonoTrampInfo *info;
1438 gpointer tramp, ptr;
1440 mono_trampolines_lock ();
1441 if (rgctx_lazy_fetch_trampoline_hash)
1442 tramp = g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset));
1445 mono_trampolines_unlock ();
1449 if (mono_aot_only) {
1450 ptr = mono_aot_get_lazy_fetch_trampoline (offset);
1452 tramp = mono_arch_create_rgctx_lazy_fetch_trampoline (offset, &info, FALSE);
1453 mono_tramp_info_register (info, NULL);
1454 ptr = mono_create_ftnptr (mono_get_root_domain (), tramp);
1457 mono_trampolines_lock ();
1458 if (!rgctx_lazy_fetch_trampoline_hash) {
1459 rgctx_lazy_fetch_trampoline_hash = g_hash_table_new (NULL, NULL);
1460 rgctx_lazy_fetch_trampoline_hash_addr = g_hash_table_new (NULL, NULL);
1462 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset), ptr);
1463 g_assert (offset != -1);
1464 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash_addr, ptr, GUINT_TO_POINTER (offset + 1));
1465 mono_trampolines_unlock ();
1468 mono_counters_register ("RGCTX num lazy fetch trampolines",
1469 MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_trampolines);
1477 #ifdef MONO_ARCH_LLVM_SUPPORTED
1479 * mono_create_llvm_imt_trampoline:
1481 * LLVM compiled code can't pass in the IMT argument, so we use this trampoline, which
1482 * sets the IMT argument, then branches to the contents of the vtable slot given by
1483 * vt_offset in the vtable which is obtained from the argument list.
1486 mono_create_llvm_imt_trampoline (MonoDomain *domain, MonoMethod *m, int vt_offset)
1488 #ifdef MONO_ARCH_HAVE_LLVM_IMT_TRAMPOLINE
1489 return mono_arch_get_llvm_imt_trampoline (domain, m, vt_offset);
1491 g_assert_not_reached ();
1498 mono_find_rgctx_lazy_fetch_trampoline_by_addr (gconstpointer addr)
1502 mono_trampolines_lock ();
1503 if (rgctx_lazy_fetch_trampoline_hash_addr) {
1504 /* We store the real offset + 1 so we can detect when the lookup fails */
1505 offset = GPOINTER_TO_INT (g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash_addr, addr));
1513 mono_trampolines_unlock ();
1517 static const char*tramp_names [MONO_TRAMPOLINE_NUM] = {
1524 "restore_stack_prot",
1525 "generic_virtual_remoting",
1527 "handler_block_guard"
1531 * mono_get_generic_trampoline_simple_name:
1535 mono_get_generic_trampoline_simple_name (MonoTrampolineType tramp_type)
1537 return tramp_names [tramp_type];
1541 * mono_get_generic_trampoline_name:
1543 * Returns a pointer to malloc-ed memory.
1546 mono_get_generic_trampoline_name (MonoTrampolineType tramp_type)
1548 return g_strdup_printf ("generic_trampoline_%s", tramp_names [tramp_type]);
1552 * mono_get_rgctx_fetch_trampoline_name:
1554 * Returns a pointer to malloc-ed memory.
1557 mono_get_rgctx_fetch_trampoline_name (int slot)
1562 mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
1563 index = MONO_RGCTX_SLOT_INDEX (slot);
1565 return g_strdup_printf ("rgctx_fetch_trampoline_%s_%d", mrgctx ? "mrgctx" : "rgctx", index);
1569 * mini_get_single_step_trampoline:
1571 * Return a trampoline which calls debugger_agent_single_step_from_context ().
1574 mini_get_single_step_trampoline (void)
1576 static gpointer trampoline;
1581 if (mono_aot_only) {
1582 tramp = mono_aot_get_trampoline ("sdb_single_step_trampoline");
1584 #ifdef MONO_ARCH_HAVE_SDB_TRAMPOLINES
1585 MonoTrampInfo *info;
1586 tramp = mono_arch_create_sdb_trampoline (TRUE, &info, FALSE);
1587 mono_tramp_info_register (info, NULL);
1590 g_assert_not_reached ();
1593 mono_memory_barrier ();
1601 * mini_get_breakpoint_trampoline:
1603 * Return a trampoline which calls debugger_agent_breakpoint_from_context ().
1606 mini_get_breakpoint_trampoline (void)
1608 static gpointer trampoline;
1613 if (mono_aot_only) {
1614 tramp = mono_aot_get_trampoline ("sdb_breakpoint_trampoline");
1616 #ifdef MONO_ARCH_HAVE_SDB_TRAMPOLINES
1617 MonoTrampInfo *info;
1618 tramp = mono_arch_create_sdb_trampoline (FALSE, &info, FALSE);
1619 mono_tramp_info_register (info, NULL);
1622 g_assert_not_reached ();
1625 mono_memory_barrier ();