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>
20 * Address of the trampoline code. This is used by the debugger to check
21 * whether a method is a trampoline.
23 guint8* mono_trampoline_code [MONO_TRAMPOLINE_NUM];
25 static GHashTable *class_init_hash_addr = NULL;
26 static GHashTable *rgctx_lazy_fetch_trampoline_hash = NULL;
27 static GHashTable *rgctx_lazy_fetch_trampoline_hash_addr = NULL;
28 static guint32 trampoline_calls, jit_trampolines, unbox_trampolines, static_rgctx_trampolines;
30 #define mono_trampolines_lock() EnterCriticalSection (&trampolines_mutex)
31 #define mono_trampolines_unlock() LeaveCriticalSection (&trampolines_mutex)
32 static CRITICAL_SECTION 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:
64 * Return a static rgctx trampoline for M which branches to ADDR which should
65 * point to the compiled code of M.
67 * Static rgctx trampolines are used when a shared generic method which doesn't
68 * have a this argument is called indirectly, ie. from code which can't pass in
69 * the rgctx argument. The trampoline sets the rgctx argument and jumps to the
70 * methods code. These trampolines are similar to the unbox trampolines, they
71 * perform the same task as the static rgctx wrappers, but they are smaller/faster,
72 * and can be made to work with full AOT.
73 * On PPC addr should be an ftnptr and the return value is an ftnptr too.
76 mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr)
81 RgctxTrampInfo tmp_info;
84 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
85 g_assert (((gpointer*)addr) [2] == 0);
88 ctx = mini_method_get_rgctx (m);
90 domain = mono_domain_get ();
93 * In the AOT case, addr might point to either the method, or to an unbox trampoline,
94 * so make the hash keyed on the m+addr pair.
96 mono_domain_lock (domain);
97 if (!domain_jit_info (domain)->static_rgctx_trampoline_hash)
98 domain_jit_info (domain)->static_rgctx_trampoline_hash = g_hash_table_new (rgctx_tramp_info_hash, rgctx_tramp_info_equal);
100 tmp_info.addr = addr;
101 res = g_hash_table_lookup (domain_jit_info (domain)->static_rgctx_trampoline_hash,
103 mono_domain_unlock (domain);
108 res = mono_aot_get_static_rgctx_trampoline (ctx, addr);
110 res = mono_arch_get_static_rgctx_trampoline (m, ctx, addr);
112 mono_domain_lock (domain);
113 /* Duplicates inserted while we didn't hold the lock are OK */
114 info = mono_domain_alloc (domain, sizeof (RgctxTrampInfo));
117 g_hash_table_insert (domain_jit_info (domain)->static_rgctx_trampoline_hash, info, res);
118 mono_domain_unlock (domain);
120 static_rgctx_trampolines ++;
126 mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr)
129 * This shouldn't happen as all arches which support generic sharing support
130 * static rgctx trampolines as well.
132 g_assert_not_reached ();
136 #ifdef MONO_ARCH_HAVE_IMT
139 * Either IMPL_METHOD or AOT_ADDR will be set on return.
144 * This works against problems when compiling with gcc 4.6 on arm. The 'then' part of
145 * this line gets executed, even when the condition is false:
146 * if (impl && mono_method_needs_static_rgctx_invoke (impl, FALSE))
147 * *need_rgctx_tramp = TRUE;
149 __attribute__ ((noinline))
151 mono_convert_imt_slot_to_vtable_slot (gpointer* slot, mgreg_t *regs, guint8 *code, MonoMethod *method, gboolean lookup_aot, MonoMethod **impl_method, gboolean *need_rgctx_tramp, gboolean *variance_used, gpointer *aot_addr)
153 MonoObject *this_argument = mono_arch_get_this_arg_from_call (regs, code);
154 MonoVTable *vt = this_argument->vtable;
155 int displacement = slot - ((gpointer*)vt);
157 if (displacement > 0) {
158 /* slot is in the vtable, not in the IMT */
160 printf ("mono_convert_imt_slot_to_vtable_slot: slot %p is in the vtable, not in the IMT\n", slot);
164 MonoMethod *imt_method = mono_arch_find_imt_method (regs, code);
166 int interface_offset;
167 int imt_slot = MONO_IMT_SIZE + displacement;
169 /*This has to be variance aware since imt_method can be from an interface that vt->klass doesn't directly implement*/
170 interface_offset = mono_class_interface_offset_with_variance (vt->klass, imt_method->klass, variance_used);
172 if (interface_offset < 0) {
173 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));
175 mono_vtable_build_imt_slot (vt, mono_method_get_imt_slot (imt_method));
177 if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) {
178 MonoGenericContext context = { NULL, NULL };
181 * Generic virtual method, imt_method contains the inflated interface
182 * method, need to get the inflated impl method.
184 /* imt_method->slot might not be set */
185 impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_declaring_generic_method (imt_method)->slot);
187 if (impl->klass->generic_class)
188 context.class_inst = impl->klass->generic_class->context.class_inst;
189 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
190 impl = mono_class_inflate_generic_method (impl, &context);
192 /* Avoid loading metadata or creating a generic vtable if possible */
193 if (lookup_aot && !vt->klass->valuetype)
194 *aot_addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, interface_offset + mono_method_get_vtable_slot (imt_method));
200 impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_vtable_slot (imt_method));
203 if (impl && mono_method_needs_static_rgctx_invoke (impl, FALSE))
204 *need_rgctx_tramp = TRUE;
205 if (impl && impl->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED) {
206 WrapperInfo *info = mono_marshal_get_wrapper_info (impl);
208 if (info && info->subtype == WRAPPER_SUBTYPE_GENERIC_ARRAY_HELPER) {
209 *need_rgctx_tramp = TRUE;
215 printf ("mono_convert_imt_slot_to_vtable_slot: method = %s.%s.%s, imt_method = %s.%s.%s\n",
216 method->klass->name_space, method->klass->name, method->name,
217 imt_method->klass->name_space, imt_method->klass->name, imt_method->name);
220 g_assert (imt_slot < MONO_IMT_SIZE);
221 if (vt->imt_collisions_bitmap & (1 << imt_slot)) {
222 int slot = mono_method_get_vtable_index (imt_method);
224 gpointer *vtable_slot;
226 g_assert (slot != -1);
227 vtable_offset = interface_offset + slot;
228 vtable_slot = & (vt->vtable [vtable_offset]);
230 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);
235 printf ("mono_convert_imt_slot_to_vtable_slot: slot %p[%d] is in the IMT, but not colliding\n", slot, imt_slot);
244 * This is a super-ugly hack to fix bug #616463.
246 * The problem is that we don't always set is_generic for generic
247 * method definitions. See the comment at the end of
248 * mono_class_inflate_generic_method_full_checked() in class.c.
251 is_generic_method_definition (MonoMethod *m)
253 MonoGenericContext *context;
259 context = mono_method_get_context (m);
260 if (!context->method_inst)
262 if (context->method_inst == mono_method_get_generic_container (((MonoMethodInflated*)m)->declaring)->context.method_inst)
268 mini_jit_info_is_gsharedvt (MonoJitInfo *ji)
270 if (ji && ji->has_generic_jit_info && (mono_jit_info_get_generic_sharing_context (ji)->var_is_vt ||
271 mono_jit_info_get_generic_sharing_context (ji)->mvar_is_vt))
278 * mini_add_method_trampoline:
280 * Add static rgctx/gsharedvt_in/unbox trampolines to M/COMPILED_METHOD if needed. Return the trampoline address, or
281 * COMPILED_METHOD if no trampoline is needed.
282 * ORIG_METHOD is the method the caller originally called i.e. an iface method, or NULL.
285 mini_add_method_trampoline (MonoMethod *orig_method, MonoMethod *m, gpointer compiled_method, gboolean add_static_rgctx_tramp, gboolean add_unbox_tramp)
287 gpointer addr = compiled_method;
288 gboolean callee_gsharedvt, callee_array_helper;
289 MonoMethod *jmethod = NULL;
292 // FIXME: This loads information from AOT (perf problem)
293 ji = mini_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method), NULL);
294 callee_gsharedvt = mini_jit_info_is_gsharedvt (ji);
296 callee_array_helper = FALSE;
297 if (m->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED) {
298 WrapperInfo *info = mono_marshal_get_wrapper_info (m);
301 * generic array helpers.
302 * Have to replace the wrappers with the original generic instances.
304 if (info && info->subtype == WRAPPER_SUBTYPE_GENERIC_ARRAY_HELPER) {
305 callee_array_helper = TRUE;
306 m = info->d.generic_array_helper.method;
308 } else if (m->wrapper_type == MONO_WRAPPER_UNKNOWN) {
309 WrapperInfo *info = mono_marshal_get_wrapper_info (m);
311 /* Same for synchronized inner wrappers */
312 if (info && info->subtype == WRAPPER_SUBTYPE_SYNCHRONIZED_INNER) {
313 m = info->d.synchronized_inner.method;
320 if (callee_gsharedvt)
321 g_assert (m->is_inflated);
323 addr = compiled_method;
325 if (add_unbox_tramp) {
327 * The unbox trampolines call the method directly, so need to add
328 * an rgctx tramp before them.
331 addr = mono_aot_get_unbox_trampoline (m);
333 unbox_trampolines ++;
334 addr = mono_arch_get_unbox_trampoline (m, addr);
339 jmethod = jinfo_get_method (ji);
340 if (callee_gsharedvt && mini_is_gsharedvt_variable_signature (mono_method_signature (jmethod))) {
341 MonoGenericSharingContext *gsctx;
342 MonoMethodSignature *sig, *gsig;
344 /* Here m is a generic instance, while ji->method is the gsharedvt method implementing it */
346 /* Call from normal/gshared code to gsharedvt code with variable signature */
347 gsctx = mono_jit_info_get_generic_sharing_context (ji);
349 sig = mono_method_signature (m);
350 gsig = mono_method_signature (jmethod);
352 addr = mini_get_gsharedvt_wrapper (TRUE, addr, sig, gsig, gsctx, -1, FALSE);
354 //printf ("IN: %s\n", mono_method_full_name (m, TRUE));
357 if (callee_array_helper) {
358 add_static_rgctx_tramp = FALSE;
359 /* FIXME: ji->from_aot is not set for llvm methods */
360 if (ji && (ji->from_aot || mono_aot_only)) {
361 /* In AOT mode, compiled_method points to one of the InternalArray methods in Array. */
362 if (mono_method_needs_static_rgctx_invoke (jinfo_get_method (ji), TRUE))
363 add_static_rgctx_tramp = TRUE;
367 if (add_static_rgctx_tramp)
368 addr = mono_create_static_rgctx_trampoline (m, addr);
374 * common_call_trampoline:
376 * The code to handle normal, virtual, and interface method calls and jumps, both
377 * from JITted and LLVM compiled code.
380 common_call_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8* tramp, MonoVTable *vt, gpointer *vtable_slot, gboolean need_rgctx_tramp)
382 gpointer addr, compiled_method;
383 gboolean generic_shared = FALSE;
384 gboolean need_unbox_tramp = FALSE;
385 MonoMethod *declaring = NULL;
386 MonoMethod *generic_virtual = NULL, *variant_iface = NULL, *orig_method = NULL;
388 gboolean virtual, variance_used = FALSE;
389 gpointer *orig_vtable_slot, *vtable_slot_to_patch = NULL;
390 MonoJitInfo *ji = NULL;
392 virtual = (gpointer)vtable_slot > (gpointer)vt;
394 orig_vtable_slot = vtable_slot;
395 vtable_slot_to_patch = vtable_slot;
397 #ifdef MONO_ARCH_HAVE_IMT
399 if (vt && (gpointer)vtable_slot < (gpointer)vt) {
400 MonoMethod *impl_method = NULL;
401 MonoObject *this_arg;
403 /* we get the interface method because mono_convert_imt_slot_to_vtable_slot ()
404 * needs the signature to be able to find the this argument
406 m = mono_arch_find_imt_method (regs, code);
407 vtable_slot = orig_vtable_slot;
408 g_assert (vtable_slot);
412 this_arg = mono_arch_get_this_arg_from_call (regs, code);
414 if (mono_object_is_transparent_proxy (this_arg)) {
415 /* Use the slow path for now */
416 m = mono_object_get_virtual_method (this_arg, m);
417 vtable_slot_to_patch = NULL;
421 if (m->is_inflated && ((MonoMethodInflated*)m)->context.method_inst) {
422 /* Generic virtual method */
424 need_rgctx_tramp = TRUE;
425 } else if (variance_used && mono_class_has_variant_generic_params (m->klass)) {
430 /* We can only use the AOT compiled code if we don't require further processing */
431 lookup_aot = !generic_virtual & !variant_iface;
432 vtable_slot = mono_convert_imt_slot_to_vtable_slot (vtable_slot, regs, code, m, lookup_aot, &impl_method, &need_rgctx_tramp, &variance_used, &addr);
433 /* This is the vcall slot which gets called through the IMT thunk */
434 vtable_slot_to_patch = vtable_slot;
435 /* mono_convert_imt_slot_to_vtable_slot () also gives us the method that is supposed
436 * to be called, so we compile it and go ahead as usual.
438 /*g_print ("imt found method %p (%s) at %p\n", impl_method, impl_method->name, code);*/
442 * We found AOT compiled code for the method, skip the rest.
444 if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
447 return mono_create_ftnptr (mono_domain_get (), addr);
456 * The virtual check is needed because is_generic_method_definition (m) could
457 * return TRUE for methods used in IMT calls too.
459 if (virtual && is_generic_method_definition (m)) {
460 MonoGenericContext context = { NULL, NULL };
461 MonoMethod *declaring;
464 declaring = mono_method_get_declaring_generic_method (m);
468 if (m->klass->generic_class)
469 context.class_inst = m->klass->generic_class->context.class_inst;
471 g_assert (!m->klass->generic_container);
473 #ifdef MONO_ARCH_HAVE_IMT
474 generic_virtual = mono_arch_find_imt_method (regs, code);
476 if (generic_virtual) {
477 g_assert (generic_virtual->is_inflated);
478 context.method_inst = ((MonoMethodInflated*)generic_virtual)->context.method_inst;
481 m = mono_class_inflate_generic_method (declaring, &context);
482 /* FIXME: only do this if the method is sharable */
483 need_rgctx_tramp = TRUE;
484 } else if ((context_used = mono_method_check_context_used (m))) {
485 MonoClass *klass = NULL;
486 MonoMethod *actual_method = NULL;
487 MonoVTable *vt = NULL;
488 MonoGenericInst *method_inst = NULL;
491 generic_shared = TRUE;
495 if (m->is_inflated && mono_method_get_context (m)->method_inst) {
496 #ifdef MONO_ARCH_RGCTX_REG
497 MonoMethodRuntimeGenericContext *mrgctx = (MonoMethodRuntimeGenericContext*)mono_arch_find_static_call_vtable (regs, code);
499 klass = mrgctx->class_vtable->klass;
500 method_inst = mrgctx->method_inst;
502 g_assert_not_reached ();
504 } else if ((m->flags & METHOD_ATTRIBUTE_STATIC) || m->klass->valuetype) {
505 #ifdef MONO_ARCH_RGCTX_REG
506 MonoVTable *vtable = mono_arch_find_static_call_vtable (regs, code);
508 klass = vtable->klass;
510 g_assert_not_reached ();
513 #ifdef MONO_ARCH_HAVE_IMT
514 MonoObject *this_argument = mono_arch_get_this_arg_from_call (regs, code);
516 vt = this_argument->vtable;
517 vtable_slot = orig_vtable_slot;
519 g_assert (this_argument->vtable->klass->inited);
520 //mono_class_init (this_argument->vtable->klass);
523 mono_class_setup_supertypes (this_argument->vtable->klass);
524 klass = this_argument->vtable->klass->supertypes [m->klass->idepth - 1];
531 g_assert (vtable_slot || klass);
534 int displacement = vtable_slot - ((gpointer*)vt);
536 g_assert_not_reached ();
538 g_assert (displacement > 0);
540 actual_method = vt->klass->vtable [displacement];
543 if (method_inst || m->wrapper_type) {
544 MonoGenericContext context = { NULL, NULL };
547 declaring = mono_method_get_declaring_generic_method (m);
551 if (klass->generic_class)
552 context.class_inst = klass->generic_class->context.class_inst;
553 else if (klass->generic_container)
554 context.class_inst = klass->generic_container->context.class_inst;
555 context.method_inst = method_inst;
557 actual_method = mono_class_inflate_generic_method (declaring, &context);
559 actual_method = mono_class_get_method_generic (klass, m);
563 g_assert (actual_method);
564 g_assert (actual_method->klass == klass);
566 if (actual_method->is_inflated)
567 declaring = mono_method_get_declaring_generic_method (actual_method);
574 if (m->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) {
575 m = mono_marshal_get_synchronized_wrapper (m);
576 need_rgctx_tramp = FALSE;
579 /* Calls made through delegates on platforms without delegate trampolines */
580 if (!code && mono_method_needs_static_rgctx_invoke (m, FALSE))
581 need_rgctx_tramp = TRUE;
583 addr = compiled_method = mono_compile_method (m);
586 if (generic_virtual || variant_iface) {
587 if (vt->klass->valuetype) /*FIXME is this required variant iface?*/
588 need_unbox_tramp = TRUE;
589 } else if (orig_vtable_slot) {
590 if (m->klass->valuetype)
591 need_unbox_tramp = TRUE;
594 addr = mini_add_method_trampoline (orig_method, m, compiled_method, need_rgctx_tramp, need_unbox_tramp);
596 if (generic_virtual || variant_iface) {
597 MonoMethod *target = generic_virtual ? generic_virtual : variant_iface;
599 vtable_slot = orig_vtable_slot;
600 g_assert (vtable_slot);
602 mono_method_add_generic_virtual_invocation (mono_domain_get (),
609 /* the method was jumped to */
611 MonoDomain *domain = mono_domain_get ();
613 /* Patch the got entries pointing to this method */
615 * We do this here instead of in mono_codegen () to cover the case when m
616 * was loaded from an aot image.
618 if (domain_jit_info (domain)->jump_target_got_slot_hash) {
621 mono_domain_lock (domain);
622 list = g_hash_table_lookup (domain_jit_info (domain)->jump_target_got_slot_hash, m);
624 for (tmp = list; tmp; tmp = tmp->next) {
625 gpointer *got_slot = tmp->data;
628 g_hash_table_remove (domain_jit_info (domain)->jump_target_got_slot_hash, m);
631 mono_domain_unlock (domain);
637 vtable_slot = orig_vtable_slot;
640 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))) {
641 g_assert (*vtable_slot_to_patch);
642 *vtable_slot_to_patch = mono_get_addr_from_ftnptr (addr);
646 guint8 *plt_entry = mono_aot_get_plt_entry (code);
647 gboolean no_patch = FALSE;
648 MonoJitInfo *target_ji;
651 if (generic_shared) {
653 mini_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method), NULL);
655 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
657 if (ji && target_ji && generic_shared && ji->has_generic_jit_info && !target_ji->has_generic_jit_info) {
662 mono_aot_patch_plt_entry (plt_entry, NULL, regs, addr);
664 if (generic_shared) {
665 if (m->wrapper_type != MONO_WRAPPER_NONE)
666 m = mono_marshal_method_from_wrapper (m);
667 //g_assert (mono_method_is_generic_sharable (m, FALSE));
670 /* Patch calling code */
672 mini_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method), NULL);
674 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
676 if (ji && target_ji && generic_shared && ji->has_generic_jit_info && !target_ji->has_generic_jit_info) {
678 * Can't patch the call as the caller is gshared, but the callee is not. Happens when
679 * generic sharing fails.
680 * FIXME: Performance problem.
685 if (!no_patch && mono_method_same_domain (ji, target_ji))
686 mono_arch_patch_callsite (ji->code_start, code, addr);
694 * mono_magic_trampoline:
696 * This trampoline handles normal calls from JITted code.
699 mono_magic_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp)
703 return common_call_trampoline (regs, code, arg, tramp, NULL, NULL, FALSE);
707 * mono_vcall_trampoline:
709 * This trampoline handles virtual calls.
712 mono_vcall_trampoline (mgreg_t *regs, guint8 *code, int slot, guint8 *tramp)
716 gpointer *vtable_slot;
718 gboolean need_rgctx_tramp = FALSE;
724 * We need to obtain the following pieces of information:
725 * - the method which needs to be compiled.
727 * We use one vtable trampoline per vtable slot index, so we need only the vtable,
728 * the other two can be computed from the vtable + the slot index.
730 #ifndef MONO_ARCH_THIS_AS_FIRST_ARG
731 /* All architectures should support this */
732 g_assert_not_reached ();
736 * Obtain the vtable from the 'this' arg.
738 this = mono_arch_get_this_arg_from_call (regs, code);
744 /* Normal virtual call */
745 vtable_slot = &(vt->vtable [slot]);
747 /* Avoid loading metadata or creating a generic vtable if possible */
748 addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, slot);
749 if (addr && !vt->klass->valuetype) {
750 if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
753 return mono_create_ftnptr (mono_domain_get (), addr);
758 * is_generic_method_definition() above) also
759 * goes away if we do a
760 * mono_class_setup_vtable (vt->klass) here,
761 * because we then inflate the method
762 * correctly, put it in the cache, and the
763 * "wrong" inflation invocation still looks up
764 * the correctly inflated method.
766 * The hack above seems more stable and
769 m = mono_class_get_vtable_entry (vt->klass, slot);
771 need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (m, 0);
774 vtable_slot = &(((gpointer*)vt) [slot]);
777 need_rgctx_tramp = FALSE;
780 return common_call_trampoline (regs, code, m, tramp, vt, vtable_slot, need_rgctx_tramp);
783 #ifndef DISABLE_REMOTING
785 mono_generic_virtual_remoting_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8 *tramp)
787 MonoGenericContext context = { NULL, NULL };
788 MonoMethod *imt_method, *declaring;
793 g_assert (m->is_generic);
796 declaring = mono_method_get_declaring_generic_method (m);
800 if (m->klass->generic_class)
801 context.class_inst = m->klass->generic_class->context.class_inst;
803 g_assert (!m->klass->generic_container);
805 #ifdef MONO_ARCH_HAVE_IMT
806 imt_method = mono_arch_find_imt_method (regs, code);
807 if (imt_method->is_inflated)
808 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
810 m = mono_class_inflate_generic_method (declaring, &context);
811 m = mono_marshal_get_remoting_invoke_with_check (m);
813 addr = mono_compile_method (m);
821 * mono_aot_trampoline:
823 * This trampoline handles calls made from AOT code. We try to bypass the
824 * normal JIT compilation logic to avoid loading the metadata for the method.
826 #ifdef MONO_ARCH_AOT_SUPPORTED
828 mono_aot_trampoline (mgreg_t *regs, guint8 *code, guint8 *token_info,
833 MonoMethod *method = NULL;
839 image = *(gpointer*)(gpointer)token_info;
840 token_info += sizeof (gpointer);
841 token = *(guint32*)(gpointer)token_info;
843 addr = mono_aot_get_method_from_token (mono_domain_get (), image, token);
845 method = mono_get_method (image, token, NULL);
848 /* Use the generic code */
849 return mono_magic_trampoline (regs, code, method, tramp);
852 addr = mono_create_ftnptr (mono_domain_get (), addr);
854 /* This is a normal call through a PLT entry */
855 plt_entry = mono_aot_get_plt_entry (code);
856 g_assert (plt_entry);
858 mono_aot_patch_plt_entry (plt_entry, NULL, regs, addr);
864 * mono_aot_plt_trampoline:
866 * This trampoline handles calls made from AOT code through the PLT table.
869 mono_aot_plt_trampoline (mgreg_t *regs, guint8 *code, guint8 *aot_module,
872 guint32 plt_info_offset = mono_aot_get_plt_info_offset (regs, code);
877 res = mono_aot_plt_resolve (aot_module, plt_info_offset, code);
879 if (mono_loader_get_last_error ())
880 mono_raise_exception (mono_loader_error_prepare_exception (mono_loader_get_last_error ()));
881 // FIXME: Error handling (how ?)
890 * mono_class_init_trampoline:
892 * This method calls mono_runtime_class_init () to run the static constructor
893 * for the type, then patches the caller code so it is not called again.
896 mono_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp)
898 guint8 *plt_entry = mono_aot_get_plt_entry (code);
902 mono_runtime_class_init (vtable);
904 if (vtable->initialized) {
906 mono_arch_nullify_plt_entry (plt_entry, regs);
908 mono_arch_nullify_class_init_trampoline (code, regs);
913 * mono_generic_class_init_trampoline:
915 * This method calls mono_runtime_class_init () to run the static constructor
919 mono_generic_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp)
923 mono_runtime_class_init (vtable);
927 mono_rgctx_lazy_fetch_trampoline (mgreg_t *regs, guint8 *code, gpointer data, guint8 *tramp)
929 #ifdef MONO_ARCH_VTABLE_REG
930 static gboolean inited = FALSE;
931 static int num_lookups = 0;
932 guint32 slot = GPOINTER_TO_UINT (data);
933 mgreg_t *r = (mgreg_t*)regs;
934 gpointer arg = (gpointer)(gssize)r [MONO_ARCH_VTABLE_REG];
935 guint32 index = MONO_RGCTX_SLOT_INDEX (slot);
936 gboolean mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
941 mono_counters_register ("RGCTX unmanaged lookups", MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_lookups);
948 return mono_method_fill_runtime_generic_context (arg, code, index);
950 return mono_class_fill_runtime_generic_context (arg, code, index);
952 g_assert_not_reached ();
957 mono_monitor_enter_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
959 mono_monitor_enter (obj);
963 mono_monitor_exit_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
965 mono_monitor_exit (obj);
968 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
971 * mono_delegate_trampoline:
973 * This trampoline handles calls made to Delegate:Invoke ().
974 * This is called once the first time a delegate is invoked, so it must be fast.
977 mono_delegate_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp)
979 MonoDomain *domain = mono_domain_get ();
980 MonoDelegate *delegate;
983 MonoMethod *method = NULL;
984 gboolean multicast, callvirt = FALSE;
985 gboolean need_rgctx_tramp = FALSE;
986 gboolean need_unbox_tramp = FALSE;
987 gboolean enable_caching = TRUE;
988 MonoMethod *invoke = tramp_data [0];
989 guint8 *impl_this = tramp_data [1];
990 guint8 *impl_nothis = tramp_data [2];
992 MonoMethodSignature *sig;
993 gpointer addr, compiled_method;
997 /* Obtain the delegate object according to the calling convention */
998 delegate = mono_arch_get_this_arg_from_call (regs, code);
1000 if (delegate->method) {
1001 method = delegate->method;
1004 * delegate->method_ptr == NULL means the delegate was initialized by
1005 * mini_delegate_ctor, while != NULL means it is initialized by
1006 * mono_delegate_ctor_with_method (). In both cases, we need to add wrappers
1007 * (ctor_with_method () does this, but it doesn't store the wrapper back into
1008 * delegate->method).
1010 #ifndef DISABLE_REMOTING
1011 if (delegate->target && delegate->target->vtable->klass == mono_defaults.transparent_proxy_class) {
1013 if (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class != mono_class_get_com_object_class () &&
1014 !mono_class_is_com_object (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class))
1016 method = mono_marshal_get_remoting_invoke (method);
1020 mono_error_init (&err);
1021 sig = mono_method_signature_checked (method, &err);
1023 mono_error_raise_exception (&err);
1025 if (sig->hasthis && method->klass->valuetype) {
1027 need_unbox_tramp = TRUE;
1029 method = mono_marshal_get_unbox_wrapper (method);
1033 ji = mono_jit_info_table_find (domain, mono_get_addr_from_ftnptr (delegate->method_ptr));
1035 method = jinfo_get_method (ji);
1039 mono_error_init (&err);
1040 sig = mono_method_signature_checked (method, &err);
1042 mono_error_raise_exception (&err);
1044 callvirt = !delegate->target && sig->hasthis;
1045 if (delegate->target &&
1046 method->flags & METHOD_ATTRIBUTE_VIRTUAL &&
1047 method->flags & METHOD_ATTRIBUTE_ABSTRACT &&
1048 method->klass->flags & TYPE_ATTRIBUTE_ABSTRACT) {
1049 method = mono_object_get_virtual_method (delegate->target, method);
1050 enable_caching = FALSE;
1054 if (method && method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
1055 method = mono_marshal_get_synchronized_wrapper (method);
1057 if (method && mono_method_needs_static_rgctx_invoke (method, FALSE))
1058 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 (NULL, 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 multicast = ((MonoMulticastDelegate*)delegate)->prev != NULL;
1081 if (!multicast && !callvirt) {
1082 if (method && (method->flags & METHOD_ATTRIBUTE_STATIC) && mono_method_signature (method)->param_count == mono_method_signature (invoke)->param_count + 1)
1083 /* Closed static delegate */
1086 code = delegate->target ? impl_this : impl_nothis;
1089 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
1094 /* The general, unoptimized case */
1095 m = mono_marshal_get_delegate_invoke (invoke, delegate);
1096 code = mono_compile_method (m);
1097 code = mini_add_method_trampoline (NULL, m, code, mono_method_needs_static_rgctx_invoke (m, FALSE), FALSE);
1098 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
1105 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1107 mono_handler_block_guard_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp)
1111 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
1112 gpointer resume_ip = jit_tls->handler_block_return_address;
1114 memcpy (&ctx, &jit_tls->handler_block_context, sizeof (MonoContext));
1115 MONO_CONTEXT_SET_IP (&ctx, jit_tls->handler_block_return_address);
1117 jit_tls->handler_block_return_address = NULL;
1118 jit_tls->handler_block = NULL;
1120 if (!resume_ip) /*this should not happen, but we should avoid crashing */
1121 exc = mono_get_exception_execution_engine ("Invalid internal state, resuming abort after handler block but no resume ip found");
1123 exc = mono_thread_resume_interruption ();
1126 mono_handle_exception (&ctx, exc);
1127 mono_restore_context (&ctx);
1134 mono_create_handler_block_trampoline (void)
1136 static gpointer code;
1138 mono_memory_barrier ();
1142 g_assert (!mono_aot_only);
1144 mono_trampolines_lock ();
1147 MonoTrampInfo *info;
1150 tmp = mono_arch_create_handler_block_trampoline (&info, FALSE);
1151 mono_tramp_info_register (info);
1152 mono_memory_barrier ();
1155 mono_trampolines_unlock ();
1162 * mono_get_trampoline_func:
1164 * Return the C function which needs to be called by the generic trampoline of type
1168 mono_get_trampoline_func (MonoTrampolineType tramp_type)
1170 switch (tramp_type) {
1171 case MONO_TRAMPOLINE_JIT:
1172 case MONO_TRAMPOLINE_JUMP:
1173 return mono_magic_trampoline;
1174 case MONO_TRAMPOLINE_CLASS_INIT:
1175 return mono_class_init_trampoline;
1176 case MONO_TRAMPOLINE_GENERIC_CLASS_INIT:
1177 return mono_generic_class_init_trampoline;
1178 case MONO_TRAMPOLINE_RGCTX_LAZY_FETCH:
1179 return mono_rgctx_lazy_fetch_trampoline;
1180 #ifdef MONO_ARCH_AOT_SUPPORTED
1181 case MONO_TRAMPOLINE_AOT:
1182 return mono_aot_trampoline;
1183 case MONO_TRAMPOLINE_AOT_PLT:
1184 return mono_aot_plt_trampoline;
1186 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1187 case MONO_TRAMPOLINE_DELEGATE:
1188 return mono_delegate_trampoline;
1190 case MONO_TRAMPOLINE_RESTORE_STACK_PROT:
1191 return mono_altstack_restore_prot;
1192 #ifndef DISABLE_REMOTING
1193 case MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING:
1194 return mono_generic_virtual_remoting_trampoline;
1196 case MONO_TRAMPOLINE_MONITOR_ENTER:
1197 return mono_monitor_enter_trampoline;
1198 case MONO_TRAMPOLINE_MONITOR_EXIT:
1199 return mono_monitor_exit_trampoline;
1200 case MONO_TRAMPOLINE_VCALL:
1201 return mono_vcall_trampoline;
1202 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1203 case MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD:
1204 return mono_handler_block_guard_trampoline;
1207 g_assert_not_reached ();
1213 create_trampoline_code (MonoTrampolineType tramp_type)
1215 MonoTrampInfo *info;
1218 code = mono_arch_create_generic_trampoline (tramp_type, &info, FALSE);
1219 mono_tramp_info_register (info);
1225 mono_trampolines_init (void)
1227 InitializeCriticalSection (&trampolines_mutex);
1232 mono_trampoline_code [MONO_TRAMPOLINE_JIT] = create_trampoline_code (MONO_TRAMPOLINE_JIT);
1233 mono_trampoline_code [MONO_TRAMPOLINE_JUMP] = create_trampoline_code (MONO_TRAMPOLINE_JUMP);
1234 mono_trampoline_code [MONO_TRAMPOLINE_CLASS_INIT] = create_trampoline_code (MONO_TRAMPOLINE_CLASS_INIT);
1235 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_CLASS_INIT] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_CLASS_INIT);
1236 mono_trampoline_code [MONO_TRAMPOLINE_RGCTX_LAZY_FETCH] = create_trampoline_code (MONO_TRAMPOLINE_RGCTX_LAZY_FETCH);
1237 #ifdef MONO_ARCH_AOT_SUPPORTED
1238 mono_trampoline_code [MONO_TRAMPOLINE_AOT] = create_trampoline_code (MONO_TRAMPOLINE_AOT);
1239 mono_trampoline_code [MONO_TRAMPOLINE_AOT_PLT] = create_trampoline_code (MONO_TRAMPOLINE_AOT_PLT);
1241 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1242 mono_trampoline_code [MONO_TRAMPOLINE_DELEGATE] = create_trampoline_code (MONO_TRAMPOLINE_DELEGATE);
1244 mono_trampoline_code [MONO_TRAMPOLINE_RESTORE_STACK_PROT] = create_trampoline_code (MONO_TRAMPOLINE_RESTORE_STACK_PROT);
1245 #ifndef DISABLE_REMOTING
1246 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING);
1248 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_ENTER] = create_trampoline_code (MONO_TRAMPOLINE_MONITOR_ENTER);
1249 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_EXIT] = create_trampoline_code (MONO_TRAMPOLINE_MONITOR_EXIT);
1250 mono_trampoline_code [MONO_TRAMPOLINE_VCALL] = create_trampoline_code (MONO_TRAMPOLINE_VCALL);
1251 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1252 mono_trampoline_code [MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD] = create_trampoline_code (MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD);
1253 mono_create_handler_block_trampoline ();
1256 mono_counters_register ("Calls to trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &trampoline_calls);
1257 mono_counters_register ("JIT trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &jit_trampolines);
1258 mono_counters_register ("Unbox trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &unbox_trampolines);
1259 mono_counters_register ("Static rgctx trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &static_rgctx_trampolines);
1263 mono_trampolines_cleanup (void)
1265 if (class_init_hash_addr)
1266 g_hash_table_destroy (class_init_hash_addr);
1267 if (rgctx_lazy_fetch_trampoline_hash)
1268 g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash);
1269 if (rgctx_lazy_fetch_trampoline_hash_addr)
1270 g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash_addr);
1272 DeleteCriticalSection (&trampolines_mutex);
1276 mono_get_trampoline_code (MonoTrampolineType tramp_type)
1278 g_assert (mono_trampoline_code [tramp_type]);
1280 return mono_trampoline_code [tramp_type];
1284 mono_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
1287 return mono_aot_create_specific_trampoline (mono_defaults.corlib, arg1, tramp_type, domain, code_len);
1289 return mono_arch_create_specific_trampoline (arg1, tramp_type, domain, code_len);
1293 mono_create_class_init_trampoline (MonoVTable *vtable)
1296 MonoDomain *domain = vtable->domain;
1298 g_assert (!vtable->klass->generic_container);
1300 /* previously created trampoline code */
1301 mono_domain_lock (domain);
1303 g_hash_table_lookup (domain_jit_info (domain)->class_init_trampoline_hash,
1305 mono_domain_unlock (domain);
1309 code = mono_create_specific_trampoline (vtable, MONO_TRAMPOLINE_CLASS_INIT, domain, NULL);
1311 ptr = mono_create_ftnptr (domain, code);
1313 /* store trampoline address */
1314 mono_domain_lock (domain);
1315 g_hash_table_insert (domain_jit_info (domain)->class_init_trampoline_hash,
1317 mono_domain_unlock (domain);
1319 mono_trampolines_lock ();
1320 if (!class_init_hash_addr)
1321 class_init_hash_addr = g_hash_table_new (NULL, NULL);
1322 g_hash_table_insert (class_init_hash_addr, ptr, vtable);
1323 mono_trampolines_unlock ();
1329 mono_create_generic_class_init_trampoline (void)
1331 #ifdef MONO_ARCH_VTABLE_REG
1332 static gpointer code;
1333 MonoTrampInfo *info;
1335 mono_trampolines_lock ();
1339 /* get_named_code () might return an ftnptr, but our caller expects a direct pointer */
1340 code = mono_get_addr_from_ftnptr (mono_aot_get_trampoline ("generic_class_init_trampoline"));
1342 code = mono_arch_create_generic_class_init_trampoline (&info, FALSE);
1343 mono_tramp_info_register (info);
1347 mono_trampolines_unlock ();
1351 g_assert_not_reached ();
1356 mono_create_jump_trampoline (MonoDomain *domain, MonoMethod *method, gboolean add_sync_wrapper)
1360 guint32 code_size = 0;
1362 code = mono_jit_find_compiled_method_with_jit_info (domain, method, &ji);
1364 * We cannot recover the correct type of a shared generic
1365 * method from its native code address, so we use the
1366 * trampoline instead.
1367 * For synchronized methods, the trampoline adds the wrapper.
1369 if (code && !ji->has_generic_jit_info && !(method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED))
1372 mono_domain_lock (domain);
1373 code = g_hash_table_lookup (domain_jit_info (domain)->jump_trampoline_hash, method);
1374 mono_domain_unlock (domain);
1378 code = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JUMP, mono_domain_get (), &code_size);
1379 g_assert (code_size);
1381 ji = mono_domain_alloc0 (domain, MONO_SIZEOF_JIT_INFO);
1382 ji->code_start = code;
1383 ji->code_size = code_size;
1384 ji->d.method = method;
1387 * mono_delegate_ctor needs to find the method metadata from the
1388 * trampoline address, so we save it here.
1391 mono_jit_info_table_add (domain, ji);
1393 mono_domain_lock (domain);
1394 g_hash_table_insert (domain_jit_info (domain)->jump_trampoline_hash, method, ji->code_start);
1395 mono_domain_unlock (domain);
1397 return ji->code_start;
1401 mono_create_jit_trampoline_in_domain (MonoDomain *domain, MonoMethod *method)
1405 if (mono_aot_only) {
1406 /* Avoid creating trampolines if possible */
1407 gpointer code = mono_jit_find_compiled_method (domain, method);
1413 mono_domain_lock (domain);
1414 tramp = g_hash_table_lookup (domain_jit_info (domain)->jit_trampoline_hash, method);
1415 mono_domain_unlock (domain);
1419 tramp = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JIT, domain, NULL);
1421 mono_domain_lock (domain);
1422 g_hash_table_insert (domain_jit_info (domain)->jit_trampoline_hash, method, tramp);
1423 mono_domain_unlock (domain);
1431 mono_create_jit_trampoline (MonoMethod *method)
1433 return mono_create_jit_trampoline_in_domain (mono_domain_get (), method);
1437 mono_create_jit_trampoline_from_token (MonoImage *image, guint32 token)
1441 MonoDomain *domain = mono_domain_get ();
1442 guint8 *buf, *start;
1444 buf = start = mono_domain_alloc0 (domain, 2 * sizeof (gpointer));
1446 *(gpointer*)(gpointer)buf = image;
1447 buf += sizeof (gpointer);
1448 *(guint32*)(gpointer)buf = token;
1450 tramp = mono_create_specific_trampoline (start, MONO_TRAMPOLINE_AOT, domain, NULL);
1458 mono_create_delegate_trampoline (MonoDomain *domain, MonoClass *klass)
1460 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1462 guint32 code_size = 0;
1463 gpointer *tramp_data;
1466 mono_domain_lock (domain);
1467 ptr = g_hash_table_lookup (domain_jit_info (domain)->delegate_trampoline_hash, klass);
1468 mono_domain_unlock (domain);
1472 // Precompute the delegate invoke impl and pass it to the delegate trampoline
1473 invoke = mono_get_delegate_invoke (klass);
1476 tramp_data = mono_domain_alloc (domain, sizeof (gpointer) * 3);
1477 tramp_data [0] = invoke;
1478 tramp_data [1] = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), TRUE);
1479 tramp_data [2] = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), FALSE);
1481 ptr = mono_create_specific_trampoline (tramp_data, MONO_TRAMPOLINE_DELEGATE, domain, &code_size);
1482 g_assert (code_size);
1484 /* store trampoline address */
1485 mono_domain_lock (domain);
1486 g_hash_table_insert (domain_jit_info (domain)->delegate_trampoline_hash,
1488 mono_domain_unlock (domain);
1497 mono_create_rgctx_lazy_fetch_trampoline (guint32 offset)
1499 static gboolean inited = FALSE;
1500 static int num_trampolines = 0;
1501 MonoTrampInfo *info;
1503 gpointer tramp, ptr;
1505 mono_trampolines_lock ();
1506 if (rgctx_lazy_fetch_trampoline_hash)
1507 tramp = g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset));
1510 mono_trampolines_unlock ();
1514 if (mono_aot_only) {
1515 ptr = mono_aot_get_lazy_fetch_trampoline (offset);
1517 tramp = mono_arch_create_rgctx_lazy_fetch_trampoline (offset, &info, FALSE);
1518 mono_tramp_info_register (info);
1519 ptr = mono_create_ftnptr (mono_get_root_domain (), tramp);
1522 mono_trampolines_lock ();
1523 if (!rgctx_lazy_fetch_trampoline_hash) {
1524 rgctx_lazy_fetch_trampoline_hash = g_hash_table_new (NULL, NULL);
1525 rgctx_lazy_fetch_trampoline_hash_addr = g_hash_table_new (NULL, NULL);
1527 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset), ptr);
1528 g_assert (offset != -1);
1529 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash_addr, ptr, GUINT_TO_POINTER (offset + 1));
1530 mono_trampolines_unlock ();
1533 mono_counters_register ("RGCTX num lazy fetch trampolines",
1534 MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_trampolines);
1543 mono_create_monitor_enter_trampoline (void)
1545 static gpointer code;
1547 if (mono_aot_only) {
1549 code = mono_aot_get_trampoline ("monitor_enter_trampoline");
1553 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
1554 mono_trampolines_lock ();
1557 MonoTrampInfo *info;
1559 code = mono_arch_create_monitor_enter_trampoline (&info, FALSE);
1560 mono_tramp_info_register (info);
1563 mono_trampolines_unlock ();
1566 g_assert_not_reached ();
1573 mono_create_monitor_exit_trampoline (void)
1575 static gpointer code;
1577 if (mono_aot_only) {
1579 code = mono_aot_get_trampoline ("monitor_exit_trampoline");
1583 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
1584 mono_trampolines_lock ();
1587 MonoTrampInfo *info;
1589 code = mono_arch_create_monitor_exit_trampoline (&info, FALSE);
1590 mono_tramp_info_register (info);
1593 mono_trampolines_unlock ();
1596 g_assert_not_reached ();
1601 #ifdef MONO_ARCH_LLVM_SUPPORTED
1603 * mono_create_llvm_imt_trampoline:
1605 * LLVM compiled code can't pass in the IMT argument, so we use this trampoline, which
1606 * sets the IMT argument, then branches to the contents of the vtable slot given by
1607 * vt_offset in the vtable which is obtained from the argument list.
1610 mono_create_llvm_imt_trampoline (MonoDomain *domain, MonoMethod *m, int vt_offset)
1612 #ifdef MONO_ARCH_HAVE_LLVM_IMT_TRAMPOLINE
1613 return mono_arch_get_llvm_imt_trampoline (domain, m, vt_offset);
1615 g_assert_not_reached ();
1622 mono_find_class_init_trampoline_by_addr (gconstpointer addr)
1626 mono_trampolines_lock ();
1627 if (class_init_hash_addr)
1628 res = g_hash_table_lookup (class_init_hash_addr, addr);
1631 mono_trampolines_unlock ();
1636 mono_find_rgctx_lazy_fetch_trampoline_by_addr (gconstpointer addr)
1640 mono_trampolines_lock ();
1641 if (rgctx_lazy_fetch_trampoline_hash_addr) {
1642 /* We store the real offset + 1 so we can detect when the lookup fails */
1643 offset = GPOINTER_TO_INT (g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash_addr, addr));
1651 mono_trampolines_unlock ();
1655 static const char*tramp_names [MONO_TRAMPOLINE_NUM] = {
1659 "generic_class_init",
1664 "restore_stack_prot",
1665 "generic_virtual_remoting",
1669 "handler_block_guard"
1673 * mono_get_generic_trampoline_name:
1675 * Returns a pointer to malloc-ed memory.
1678 mono_get_generic_trampoline_name (MonoTrampolineType tramp_type)
1680 return g_strdup_printf ("generic_trampoline_%s", tramp_names [tramp_type]);
1684 * mono_get_rgctx_fetch_trampoline_name:
1686 * Returns a pointer to malloc-ed memory.
1689 mono_get_rgctx_fetch_trampoline_name (int slot)
1694 mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
1695 index = MONO_RGCTX_SLOT_INDEX (slot);
1697 return g_strdup_printf ("rgctx_fetch_trampoline_%s_%d", mrgctx ? "mrgctx" : "rgctx", index);
1701 mini_get_nullified_class_init_trampoline (void)
1703 static gpointer nullified_class_init_trampoline;
1705 if (!nullified_class_init_trampoline) {
1707 MonoTrampInfo *info;
1709 if (mono_aot_only) {
1710 tramp = mono_aot_get_trampoline ("nullified_class_init_trampoline");
1712 tramp = mono_arch_get_nullified_class_init_trampoline (&info);
1713 mono_tramp_info_register (info);
1715 mono_memory_barrier ();
1716 nullified_class_init_trampoline = tramp;
1719 return nullified_class_init_trampoline;