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:
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 ();
141 #ifdef MONO_ARCH_HAVE_IMT
144 * Either IMPL_METHOD or AOT_ADDR will be set on return.
149 * This works against problems when compiling with gcc 4.6 on arm. The 'then' part of
150 * this line gets executed, even when the condition is false:
151 * if (impl && mono_method_needs_static_rgctx_invoke (impl, FALSE))
152 * *need_rgctx_tramp = TRUE;
154 __attribute__ ((noinline))
156 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)
158 MonoObject *this_argument = mono_arch_get_this_arg_from_call (regs, code);
159 MonoVTable *vt = this_argument->vtable;
160 int displacement = slot - ((gpointer*)vt);
162 if (displacement > 0) {
163 /* slot is in the vtable, not in the IMT */
165 printf ("mono_convert_imt_slot_to_vtable_slot: slot %p is in the vtable, not in the IMT\n", slot);
169 MonoMethod *imt_method = mono_arch_find_imt_method (regs, code);
171 int interface_offset;
172 int imt_slot = MONO_IMT_SIZE + displacement;
174 /*This has to be variance aware since imt_method can be from an interface that vt->klass doesn't directly implement*/
175 interface_offset = mono_class_interface_offset_with_variance (vt->klass, imt_method->klass, variance_used);
177 if (interface_offset < 0) {
178 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));
180 mono_vtable_build_imt_slot (vt, mono_method_get_imt_slot (imt_method));
182 if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) {
183 MonoGenericContext context = { NULL, NULL };
186 * Generic virtual method, imt_method contains the inflated interface
187 * method, need to get the inflated impl method.
189 /* imt_method->slot might not be set */
190 impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_declaring_generic_method (imt_method)->slot);
192 if (impl->klass->generic_class)
193 context.class_inst = impl->klass->generic_class->context.class_inst;
194 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
195 impl = mono_class_inflate_generic_method (impl, &context);
197 /* Avoid loading metadata or creating a generic vtable if possible */
198 if (lookup_aot && !vt->klass->valuetype)
199 *aot_addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, interface_offset + mono_method_get_vtable_slot (imt_method));
205 impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_vtable_slot (imt_method));
208 if (impl && mono_method_needs_static_rgctx_invoke (impl, FALSE))
209 *need_rgctx_tramp = TRUE;
210 if (impl && impl->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED) {
211 WrapperInfo *info = mono_marshal_get_wrapper_info (impl);
213 if (info && info->subtype == WRAPPER_SUBTYPE_GENERIC_ARRAY_HELPER) {
214 *need_rgctx_tramp = TRUE;
220 printf ("mono_convert_imt_slot_to_vtable_slot: method = %s.%s.%s, imt_method = %s.%s.%s\n",
221 method->klass->name_space, method->klass->name, method->name,
222 imt_method->klass->name_space, imt_method->klass->name, imt_method->name);
225 g_assert (imt_slot < MONO_IMT_SIZE);
226 if (vt->imt_collisions_bitmap & (1 << imt_slot)) {
227 int slot = mono_method_get_vtable_index (imt_method);
229 gpointer *vtable_slot;
231 g_assert (slot != -1);
232 vtable_offset = interface_offset + slot;
233 vtable_slot = & (vt->vtable [vtable_offset]);
235 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);
240 printf ("mono_convert_imt_slot_to_vtable_slot: slot %p[%d] is in the IMT, but not colliding\n", slot, imt_slot);
249 * This is a super-ugly hack to fix bug #616463.
251 * The problem is that we don't always set is_generic for generic
252 * method definitions. See the comment at the end of
253 * mono_class_inflate_generic_method_full_checked() in class.c.
256 is_generic_method_definition (MonoMethod *m)
258 MonoGenericContext *context;
264 context = mono_method_get_context (m);
265 if (!context->method_inst)
267 if (context->method_inst == mono_method_get_generic_container (((MonoMethodInflated*)m)->declaring)->context.method_inst)
273 mini_jit_info_is_gsharedvt (MonoJitInfo *ji)
275 if (ji && ji->has_generic_jit_info && (mono_jit_info_get_generic_sharing_context (ji)->var_is_vt ||
276 mono_jit_info_get_generic_sharing_context (ji)->mvar_is_vt))
283 * mini_add_method_trampoline:
284 * @orig_method: the method the caller originally called i.e. an iface method, or NULL.
287 * @add_static_rgctx_tramp: adds a static rgctx trampoline
288 * @add_unbox_tramp: adds an unboxing trampoline
290 * Add static rgctx/gsharedvt_in/unbox trampolines to
291 * M/COMPILED_METHOD if needed.
293 * Returns the trampoline address, or COMPILED_METHOD if no trampoline
297 mini_add_method_trampoline (MonoMethod *orig_method, MonoMethod *m, gpointer compiled_method, gboolean add_static_rgctx_tramp, gboolean add_unbox_tramp)
299 gpointer addr = compiled_method;
300 gboolean callee_gsharedvt, callee_array_helper;
301 MonoMethod *jmethod = NULL;
304 // FIXME: This loads information from AOT (perf problem)
305 ji = mini_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method), NULL);
306 callee_gsharedvt = mini_jit_info_is_gsharedvt (ji);
308 callee_array_helper = FALSE;
309 if (m->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED) {
310 WrapperInfo *info = mono_marshal_get_wrapper_info (m);
313 * generic array helpers.
314 * Have to replace the wrappers with the original generic instances.
316 if (info && info->subtype == WRAPPER_SUBTYPE_GENERIC_ARRAY_HELPER) {
317 callee_array_helper = TRUE;
318 m = info->d.generic_array_helper.method;
320 } else if (m->wrapper_type == MONO_WRAPPER_UNKNOWN) {
321 WrapperInfo *info = mono_marshal_get_wrapper_info (m);
323 /* Same for synchronized inner wrappers */
324 if (info && info->subtype == WRAPPER_SUBTYPE_SYNCHRONIZED_INNER) {
325 m = info->d.synchronized_inner.method;
332 if (callee_gsharedvt)
333 g_assert (m->is_inflated);
335 addr = compiled_method;
337 if (add_unbox_tramp) {
339 * The unbox trampolines call the method directly, so need to add
340 * an rgctx tramp before them.
343 addr = mono_aot_get_unbox_trampoline (m);
345 unbox_trampolines ++;
346 addr = mono_arch_get_unbox_trampoline (m, addr);
351 jmethod = jinfo_get_method (ji);
352 if (callee_gsharedvt && mini_is_gsharedvt_variable_signature (mono_method_signature (jmethod))) {
353 MonoGenericSharingContext *gsctx;
354 MonoMethodSignature *sig, *gsig;
356 /* Here m is a generic instance, while ji->method is the gsharedvt method implementing it */
358 /* Call from normal/gshared code to gsharedvt code with variable signature */
359 gsctx = mono_jit_info_get_generic_sharing_context (ji);
361 sig = mono_method_signature (m);
362 gsig = mono_method_signature (jmethod);
364 addr = mini_get_gsharedvt_wrapper (TRUE, addr, sig, gsig, gsctx, -1, FALSE);
366 //printf ("IN: %s\n", mono_method_full_name (m, TRUE));
369 if (callee_array_helper) {
370 add_static_rgctx_tramp = FALSE;
371 /* FIXME: ji->from_aot is not set for llvm methods */
372 if (ji && (ji->from_aot || mono_aot_only)) {
373 /* In AOT mode, compiled_method points to one of the InternalArray methods in Array. */
374 if (mono_method_needs_static_rgctx_invoke (jinfo_get_method (ji), TRUE))
375 add_static_rgctx_tramp = TRUE;
379 if (add_static_rgctx_tramp)
380 addr = mono_create_static_rgctx_trampoline (m, addr);
386 * common_call_trampoline:
388 * The code to handle normal, virtual, and interface method calls and jumps, both
389 * from JITted and LLVM compiled code.
392 common_call_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8* tramp, MonoVTable *vt, gpointer *vtable_slot, gboolean need_rgctx_tramp)
394 gpointer addr, compiled_method;
395 gboolean generic_shared = FALSE;
396 gboolean need_unbox_tramp = FALSE;
397 MonoMethod *declaring = NULL;
398 MonoMethod *generic_virtual = NULL, *variant_iface = NULL, *orig_method = NULL;
400 gboolean virtual, variance_used = FALSE;
401 gpointer *orig_vtable_slot, *vtable_slot_to_patch = NULL;
402 MonoJitInfo *ji = NULL;
404 virtual = (gpointer)vtable_slot > (gpointer)vt;
406 orig_vtable_slot = vtable_slot;
407 vtable_slot_to_patch = vtable_slot;
409 #ifdef MONO_ARCH_HAVE_IMT
411 if (vt && (gpointer)vtable_slot < (gpointer)vt) {
412 MonoMethod *impl_method = NULL;
413 MonoObject *this_arg;
415 /* we get the interface method because mono_convert_imt_slot_to_vtable_slot ()
416 * needs the signature to be able to find the this argument
418 m = mono_arch_find_imt_method (regs, code);
419 vtable_slot = orig_vtable_slot;
420 g_assert (vtable_slot);
424 this_arg = mono_arch_get_this_arg_from_call (regs, code);
426 if (mono_object_is_transparent_proxy (this_arg)) {
427 /* Use the slow path for now */
428 m = mono_object_get_virtual_method (this_arg, m);
429 vtable_slot_to_patch = NULL;
433 mono_class_interface_offset_with_variance (vt->klass, m->klass, &variance_used);
435 if (m->is_inflated && ((MonoMethodInflated*)m)->context.method_inst) {
436 /* Generic virtual method */
438 need_rgctx_tramp = TRUE;
439 } else if (variance_used && mono_class_has_variant_generic_params (m->klass)) {
444 /* We can only use the AOT compiled code if we don't require further processing */
445 lookup_aot = !generic_virtual & !variant_iface;
446 vtable_slot = mono_convert_imt_slot_to_vtable_slot (vtable_slot, regs, code, m, lookup_aot, &impl_method, &need_rgctx_tramp, &variance_used, &addr);
447 /* This is the vcall slot which gets called through the IMT thunk */
448 vtable_slot_to_patch = vtable_slot;
449 /* mono_convert_imt_slot_to_vtable_slot () also gives us the method that is supposed
450 * to be called, so we compile it and go ahead as usual.
452 /*g_print ("imt found method %p (%s) at %p\n", impl_method, impl_method->name, code);*/
456 * We found AOT compiled code for the method, skip the rest.
458 if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
461 return mono_create_ftnptr (mono_domain_get (), addr);
470 * The virtual check is needed because is_generic_method_definition (m) could
471 * return TRUE for methods used in IMT calls too.
473 if (virtual && is_generic_method_definition (m)) {
474 MonoGenericContext context = { NULL, NULL };
475 MonoMethod *declaring;
478 declaring = mono_method_get_declaring_generic_method (m);
482 if (m->klass->generic_class)
483 context.class_inst = m->klass->generic_class->context.class_inst;
485 g_assert (!m->klass->generic_container);
487 #ifdef MONO_ARCH_HAVE_IMT
488 generic_virtual = mono_arch_find_imt_method (regs, code);
490 if (generic_virtual) {
491 g_assert (generic_virtual->is_inflated);
492 context.method_inst = ((MonoMethodInflated*)generic_virtual)->context.method_inst;
495 m = mono_class_inflate_generic_method (declaring, &context);
496 /* FIXME: only do this if the method is sharable */
497 need_rgctx_tramp = TRUE;
498 } else if ((context_used = mono_method_check_context_used (m))) {
499 MonoClass *klass = NULL;
500 MonoMethod *actual_method = NULL;
501 MonoVTable *vt = NULL;
502 MonoGenericInst *method_inst = NULL;
505 generic_shared = TRUE;
509 if (m->is_inflated && mono_method_get_context (m)->method_inst) {
510 #ifdef MONO_ARCH_RGCTX_REG
511 MonoMethodRuntimeGenericContext *mrgctx = (MonoMethodRuntimeGenericContext*)mono_arch_find_static_call_vtable (regs, code);
513 klass = mrgctx->class_vtable->klass;
514 method_inst = mrgctx->method_inst;
516 g_assert_not_reached ();
518 } else if ((m->flags & METHOD_ATTRIBUTE_STATIC) || m->klass->valuetype) {
519 #ifdef MONO_ARCH_RGCTX_REG
520 MonoVTable *vtable = mono_arch_find_static_call_vtable (regs, code);
522 klass = vtable->klass;
524 g_assert_not_reached ();
527 #ifdef MONO_ARCH_HAVE_IMT
528 MonoObject *this_argument = mono_arch_get_this_arg_from_call (regs, code);
530 vt = this_argument->vtable;
531 vtable_slot = orig_vtable_slot;
533 g_assert (this_argument->vtable->klass->inited);
534 //mono_class_init (this_argument->vtable->klass);
537 mono_class_setup_supertypes (this_argument->vtable->klass);
538 klass = this_argument->vtable->klass->supertypes [m->klass->idepth - 1];
545 g_assert (vtable_slot || klass);
548 int displacement = vtable_slot - ((gpointer*)vt);
550 g_assert_not_reached ();
552 g_assert (displacement > 0);
554 actual_method = vt->klass->vtable [displacement];
557 if (method_inst || m->wrapper_type) {
558 MonoGenericContext context = { NULL, NULL };
561 declaring = mono_method_get_declaring_generic_method (m);
565 if (klass->generic_class)
566 context.class_inst = klass->generic_class->context.class_inst;
567 else if (klass->generic_container)
568 context.class_inst = klass->generic_container->context.class_inst;
569 context.method_inst = method_inst;
571 actual_method = mono_class_inflate_generic_method (declaring, &context);
573 actual_method = mono_class_get_method_generic (klass, m);
577 g_assert (actual_method);
578 g_assert (actual_method->klass == klass);
580 if (actual_method->is_inflated)
581 declaring = mono_method_get_declaring_generic_method (actual_method);
588 if (m->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) {
589 m = mono_marshal_get_synchronized_wrapper (m);
590 need_rgctx_tramp = FALSE;
593 /* Calls made through delegates on platforms without delegate trampolines */
594 if (!code && mono_method_needs_static_rgctx_invoke (m, FALSE))
595 need_rgctx_tramp = TRUE;
597 addr = compiled_method = mono_compile_method (m);
600 if (generic_virtual || variant_iface) {
601 if (vt->klass->valuetype) /*FIXME is this required variant iface?*/
602 need_unbox_tramp = TRUE;
603 } else if (orig_vtable_slot) {
604 if (m->klass->valuetype)
605 need_unbox_tramp = TRUE;
608 addr = mini_add_method_trampoline (orig_method, m, compiled_method, need_rgctx_tramp, need_unbox_tramp);
610 if (generic_virtual || variant_iface) {
611 MonoMethod *target = generic_virtual ? generic_virtual : variant_iface;
613 vtable_slot = orig_vtable_slot;
614 g_assert (vtable_slot);
616 mono_method_add_generic_virtual_invocation (mono_domain_get (),
623 /* the method was jumped to */
625 MonoDomain *domain = mono_domain_get ();
627 /* Patch the got entries pointing to this method */
629 * We do this here instead of in mono_codegen () to cover the case when m
630 * was loaded from an aot image.
632 if (domain_jit_info (domain)->jump_target_got_slot_hash) {
635 mono_domain_lock (domain);
636 list = g_hash_table_lookup (domain_jit_info (domain)->jump_target_got_slot_hash, m);
638 for (tmp = list; tmp; tmp = tmp->next) {
639 gpointer *got_slot = tmp->data;
642 g_hash_table_remove (domain_jit_info (domain)->jump_target_got_slot_hash, m);
645 mono_domain_unlock (domain);
651 vtable_slot = orig_vtable_slot;
654 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))) {
655 g_assert (*vtable_slot_to_patch);
656 *vtable_slot_to_patch = mono_get_addr_from_ftnptr (addr);
660 guint8 *plt_entry = mono_aot_get_plt_entry (code);
661 gboolean no_patch = FALSE;
662 MonoJitInfo *target_ji;
665 if (generic_shared) {
667 mini_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method), NULL);
669 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
671 if (ji && target_ji && generic_shared && ji->has_generic_jit_info && !target_ji->has_generic_jit_info) {
676 mono_aot_patch_plt_entry (plt_entry, NULL, regs, addr);
678 if (generic_shared) {
679 if (m->wrapper_type != MONO_WRAPPER_NONE)
680 m = mono_marshal_method_from_wrapper (m);
681 //g_assert (mono_method_is_generic_sharable (m, FALSE));
684 /* Patch calling code */
686 mini_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method), NULL);
688 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
690 if (ji && target_ji && generic_shared && ji->has_generic_jit_info && !target_ji->has_generic_jit_info) {
692 * Can't patch the call as the caller is gshared, but the callee is not. Happens when
693 * generic sharing fails.
694 * FIXME: Performance problem.
699 if (!no_patch && mono_method_same_domain (ji, target_ji))
700 mono_arch_patch_callsite (ji->code_start, code, addr);
708 * mono_magic_trampoline:
710 * This trampoline handles normal calls from JITted code.
713 mono_magic_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp)
717 return common_call_trampoline (regs, code, arg, tramp, NULL, NULL, FALSE);
721 * mono_vcall_trampoline:
723 * This trampoline handles virtual calls.
726 mono_vcall_trampoline (mgreg_t *regs, guint8 *code, int slot, guint8 *tramp)
730 gpointer *vtable_slot;
732 gboolean need_rgctx_tramp = FALSE;
738 * We need to obtain the following pieces of information:
739 * - the method which needs to be compiled.
741 * We use one vtable trampoline per vtable slot index, so we need only the vtable,
742 * the other two can be computed from the vtable + the slot index.
744 #ifndef MONO_ARCH_THIS_AS_FIRST_ARG
745 /* All architectures should support this */
746 g_assert_not_reached ();
750 * Obtain the vtable from the 'this' arg.
752 this = mono_arch_get_this_arg_from_call (regs, code);
758 /* Normal virtual call */
759 vtable_slot = &(vt->vtable [slot]);
761 /* Avoid loading metadata or creating a generic vtable if possible */
762 addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, slot);
763 if (addr && !vt->klass->valuetype) {
764 if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
767 return mono_create_ftnptr (mono_domain_get (), addr);
772 * is_generic_method_definition() above) also
773 * goes away if we do a
774 * mono_class_setup_vtable (vt->klass) here,
775 * because we then inflate the method
776 * correctly, put it in the cache, and the
777 * "wrong" inflation invocation still looks up
778 * the correctly inflated method.
780 * The hack above seems more stable and
783 m = mono_class_get_vtable_entry (vt->klass, slot);
785 need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (m, 0);
788 vtable_slot = &(((gpointer*)vt) [slot]);
791 need_rgctx_tramp = FALSE;
794 return common_call_trampoline (regs, code, m, tramp, vt, vtable_slot, need_rgctx_tramp);
797 #ifndef DISABLE_REMOTING
799 mono_generic_virtual_remoting_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8 *tramp)
801 MonoGenericContext context = { NULL, NULL };
802 MonoMethod *imt_method, *declaring;
807 g_assert (m->is_generic);
810 declaring = mono_method_get_declaring_generic_method (m);
814 if (m->klass->generic_class)
815 context.class_inst = m->klass->generic_class->context.class_inst;
817 g_assert (!m->klass->generic_container);
819 #ifdef MONO_ARCH_HAVE_IMT
820 imt_method = mono_arch_find_imt_method (regs, code);
821 if (imt_method->is_inflated)
822 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
824 m = mono_class_inflate_generic_method (declaring, &context);
825 m = mono_marshal_get_remoting_invoke_with_check (m);
827 addr = mono_compile_method (m);
835 * mono_aot_trampoline:
837 * This trampoline handles calls made from AOT code. We try to bypass the
838 * normal JIT compilation logic to avoid loading the metadata for the method.
840 #ifdef MONO_ARCH_AOT_SUPPORTED
842 mono_aot_trampoline (mgreg_t *regs, guint8 *code, guint8 *token_info,
847 MonoMethod *method = NULL;
853 image = *(gpointer*)(gpointer)token_info;
854 token_info += sizeof (gpointer);
855 token = *(guint32*)(gpointer)token_info;
857 addr = mono_aot_get_method_from_token (mono_domain_get (), image, token);
859 method = mono_get_method (image, token, NULL);
862 /* Use the generic code */
863 return mono_magic_trampoline (regs, code, method, tramp);
866 addr = mono_create_ftnptr (mono_domain_get (), addr);
868 /* This is a normal call through a PLT entry */
869 plt_entry = mono_aot_get_plt_entry (code);
870 g_assert (plt_entry);
872 mono_aot_patch_plt_entry (plt_entry, NULL, regs, addr);
878 * mono_aot_plt_trampoline:
880 * This trampoline handles calls made from AOT code through the PLT table.
883 mono_aot_plt_trampoline (mgreg_t *regs, guint8 *code, guint8 *aot_module,
886 guint32 plt_info_offset = mono_aot_get_plt_info_offset (regs, code);
891 res = mono_aot_plt_resolve (aot_module, plt_info_offset, code);
893 if (mono_loader_get_last_error ())
894 mono_raise_exception (mono_loader_error_prepare_exception (mono_loader_get_last_error ()));
895 // FIXME: Error handling (how ?)
904 * mono_class_init_trampoline:
906 * This method calls mono_runtime_class_init () to run the static constructor
907 * for the type, then patches the caller code so it is not called again.
910 mono_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp)
912 guint8 *plt_entry = mono_aot_get_plt_entry (code);
916 mono_runtime_class_init (vtable);
918 if (vtable->initialized) {
920 mono_arch_nullify_plt_entry (plt_entry, regs);
922 mono_arch_nullify_class_init_trampoline (code, regs);
927 * mono_generic_class_init_trampoline:
929 * This method calls mono_runtime_class_init () to run the static constructor
933 mono_generic_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp)
937 mono_runtime_class_init (vtable);
941 mono_rgctx_lazy_fetch_trampoline (mgreg_t *regs, guint8 *code, gpointer data, guint8 *tramp)
943 #ifdef MONO_ARCH_VTABLE_REG
944 static gboolean inited = FALSE;
945 static int num_lookups = 0;
946 guint32 slot = GPOINTER_TO_UINT (data);
947 mgreg_t *r = (mgreg_t*)regs;
948 gpointer arg = (gpointer)(gssize)r [MONO_ARCH_VTABLE_REG];
949 guint32 index = MONO_RGCTX_SLOT_INDEX (slot);
950 gboolean mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
955 mono_counters_register ("RGCTX unmanaged lookups", MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_lookups);
962 return mono_method_fill_runtime_generic_context (arg, code, index);
964 return mono_class_fill_runtime_generic_context (arg, code, index);
966 g_assert_not_reached ();
971 mono_monitor_enter_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
973 mono_monitor_enter (obj);
977 mono_monitor_exit_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
979 mono_monitor_exit (obj);
982 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
987 gpointer impl_nothis;
989 MonoMethodSignature *sig;
990 gboolean need_rgctx_tramp;
994 * Precompute data to speed up mono_delegate_trampoline ().
995 * METHOD might be NULL.
998 create_delegate_trampoline_data (MonoDomain *domain, MonoClass *klass, MonoMethod *method)
1000 DelegateTrampInfo *tramp_data;
1004 // Precompute the delegate invoke impl and pass it to the delegate trampoline
1005 invoke = mono_get_delegate_invoke (klass);
1008 tramp_data = mono_domain_alloc (domain, sizeof (DelegateTrampInfo));
1009 tramp_data->invoke = invoke;
1010 tramp_data->impl_this = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), TRUE);
1011 tramp_data->impl_nothis = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), FALSE);
1012 tramp_data->method = method;
1014 mono_error_init (&err);
1015 tramp_data->sig = mono_method_signature_checked (method, &err);
1016 tramp_data->need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (method, FALSE);
1023 * mono_delegate_trampoline:
1025 * This trampoline handles calls made to Delegate:Invoke ().
1026 * This is called once the first time a delegate is invoked, so it must be fast.
1029 mono_delegate_trampoline (mgreg_t *regs, guint8 *code, gpointer *arg, guint8* tramp)
1031 MonoDomain *domain = mono_domain_get ();
1032 MonoDelegate *delegate;
1035 MonoMethod *method = NULL;
1036 gboolean multicast, callvirt = FALSE;
1037 gboolean need_rgctx_tramp = FALSE;
1038 gboolean need_unbox_tramp = FALSE;
1039 gboolean enable_caching = TRUE;
1040 DelegateTrampInfo *tramp_info = (DelegateTrampInfo*)arg;
1041 MonoMethod *invoke = tramp_info->invoke;
1042 guint8 *impl_this = tramp_info->impl_this;
1043 guint8 *impl_nothis = tramp_info->impl_nothis;
1045 MonoMethodSignature *sig;
1046 gpointer addr, compiled_method;
1048 trampoline_calls ++;
1050 /* Obtain the delegate object according to the calling convention */
1051 delegate = mono_arch_get_this_arg_from_call (regs, code);
1053 if (delegate->method) {
1054 method = delegate->method;
1057 * delegate->method_ptr == NULL means the delegate was initialized by
1058 * mini_delegate_ctor, while != NULL means it is initialized by
1059 * mono_delegate_ctor_with_method (). In both cases, we need to add wrappers
1060 * (ctor_with_method () does this, but it doesn't store the wrapper back into
1061 * delegate->method).
1063 #ifndef DISABLE_REMOTING
1064 if (delegate->target && delegate->target->vtable->klass == mono_defaults.transparent_proxy_class) {
1066 if (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class != mono_class_get_com_object_class () &&
1067 !mono_class_is_com_object (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class))
1069 method = mono_marshal_get_remoting_invoke (method);
1073 sig = tramp_info->sig;
1074 if (!(sig && method == tramp_info->method)) {
1075 mono_error_init (&err);
1076 sig = mono_method_signature_checked (method, &err);
1078 mono_error_raise_exception (&err);
1081 if (sig->hasthis && method->klass->valuetype) {
1083 need_unbox_tramp = TRUE;
1085 method = mono_marshal_get_unbox_wrapper (method);
1089 ji = mono_jit_info_table_find (domain, mono_get_addr_from_ftnptr (delegate->method_ptr));
1091 method = jinfo_get_method (ji);
1095 sig = tramp_info->sig;
1096 if (!(sig && method == tramp_info->method)) {
1097 mono_error_init (&err);
1098 sig = mono_method_signature_checked (method, &err);
1100 mono_error_raise_exception (&err);
1103 callvirt = !delegate->target && sig->hasthis;
1104 if (delegate->target &&
1105 method->flags & METHOD_ATTRIBUTE_VIRTUAL &&
1106 method->flags & METHOD_ATTRIBUTE_ABSTRACT &&
1107 method->klass->flags & TYPE_ATTRIBUTE_ABSTRACT) {
1108 method = mono_object_get_virtual_method (delegate->target, method);
1109 enable_caching = FALSE;
1112 if (method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
1113 method = mono_marshal_get_synchronized_wrapper (method);
1115 if (method == tramp_info->method)
1116 need_rgctx_tramp = tramp_info->need_rgctx_tramp;
1117 else if (mono_method_needs_static_rgctx_invoke (method, FALSE))
1118 need_rgctx_tramp = TRUE;
1122 * If the called address is a trampoline, replace it with the compiled method so
1123 * further calls don't have to go through the trampoline.
1125 if (method && !callvirt) {
1126 /* Avoid the overhead of looking up an already compiled method if possible */
1127 if (enable_caching && delegate->method_code && *delegate->method_code) {
1128 delegate->method_ptr = *delegate->method_code;
1130 compiled_method = addr = mono_compile_method (method);
1131 addr = mini_add_method_trampoline (NULL, method, compiled_method, need_rgctx_tramp, need_unbox_tramp);
1132 delegate->method_ptr = addr;
1133 if (enable_caching && delegate->method_code)
1134 *delegate->method_code = delegate->method_ptr;
1137 if (need_rgctx_tramp)
1138 delegate->method_ptr = mono_create_static_rgctx_trampoline (method, delegate->method_ptr);
1141 multicast = ((MonoMulticastDelegate*)delegate)->prev != NULL;
1142 if (!multicast && !callvirt) {
1143 if (method && (method->flags & METHOD_ATTRIBUTE_STATIC) && mono_method_signature (method)->param_count == mono_method_signature (invoke)->param_count + 1)
1144 /* Closed static delegate */
1147 code = delegate->target ? impl_this : impl_nothis;
1150 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
1155 /* The general, unoptimized case */
1156 m = mono_marshal_get_delegate_invoke (invoke, delegate);
1157 code = mono_compile_method (m);
1158 code = mini_add_method_trampoline (NULL, m, code, mono_method_needs_static_rgctx_invoke (m, FALSE), FALSE);
1159 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
1166 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1168 mono_handler_block_guard_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_info, guint8* tramp)
1172 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
1173 gpointer resume_ip = jit_tls->handler_block_return_address;
1175 memcpy (&ctx, &jit_tls->handler_block_context, sizeof (MonoContext));
1176 MONO_CONTEXT_SET_IP (&ctx, jit_tls->handler_block_return_address);
1178 jit_tls->handler_block_return_address = NULL;
1179 jit_tls->handler_block = NULL;
1181 if (!resume_ip) /*this should not happen, but we should avoid crashing */
1182 exc = mono_get_exception_execution_engine ("Invalid internal state, resuming abort after handler block but no resume ip found");
1184 exc = mono_thread_resume_interruption ();
1187 mono_handle_exception (&ctx, exc);
1188 mono_restore_context (&ctx);
1195 mono_create_handler_block_trampoline (void)
1197 static gpointer code;
1199 mono_memory_barrier ();
1203 g_assert (!mono_aot_only);
1205 mono_trampolines_lock ();
1208 MonoTrampInfo *info;
1211 tmp = mono_arch_create_handler_block_trampoline (&info, FALSE);
1212 mono_tramp_info_register (info);
1213 mono_memory_barrier ();
1216 mono_trampolines_unlock ();
1223 * mono_get_trampoline_func:
1225 * Return the C function which needs to be called by the generic trampoline of type
1229 mono_get_trampoline_func (MonoTrampolineType tramp_type)
1231 switch (tramp_type) {
1232 case MONO_TRAMPOLINE_JIT:
1233 case MONO_TRAMPOLINE_JUMP:
1234 return mono_magic_trampoline;
1235 case MONO_TRAMPOLINE_CLASS_INIT:
1236 return mono_class_init_trampoline;
1237 case MONO_TRAMPOLINE_GENERIC_CLASS_INIT:
1238 return mono_generic_class_init_trampoline;
1239 case MONO_TRAMPOLINE_RGCTX_LAZY_FETCH:
1240 return mono_rgctx_lazy_fetch_trampoline;
1241 #ifdef MONO_ARCH_AOT_SUPPORTED
1242 case MONO_TRAMPOLINE_AOT:
1243 return mono_aot_trampoline;
1244 case MONO_TRAMPOLINE_AOT_PLT:
1245 return mono_aot_plt_trampoline;
1247 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1248 case MONO_TRAMPOLINE_DELEGATE:
1249 return mono_delegate_trampoline;
1251 case MONO_TRAMPOLINE_RESTORE_STACK_PROT:
1252 return mono_altstack_restore_prot;
1253 #ifndef DISABLE_REMOTING
1254 case MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING:
1255 return mono_generic_virtual_remoting_trampoline;
1257 case MONO_TRAMPOLINE_MONITOR_ENTER:
1258 return mono_monitor_enter_trampoline;
1259 case MONO_TRAMPOLINE_MONITOR_EXIT:
1260 return mono_monitor_exit_trampoline;
1261 case MONO_TRAMPOLINE_VCALL:
1262 return mono_vcall_trampoline;
1263 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1264 case MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD:
1265 return mono_handler_block_guard_trampoline;
1268 g_assert_not_reached ();
1274 create_trampoline_code (MonoTrampolineType tramp_type)
1276 MonoTrampInfo *info;
1279 code = mono_arch_create_generic_trampoline (tramp_type, &info, FALSE);
1280 mono_tramp_info_register (info);
1286 mono_trampolines_init (void)
1288 InitializeCriticalSection (&trampolines_mutex);
1293 mono_trampoline_code [MONO_TRAMPOLINE_JIT] = create_trampoline_code (MONO_TRAMPOLINE_JIT);
1294 mono_trampoline_code [MONO_TRAMPOLINE_JUMP] = create_trampoline_code (MONO_TRAMPOLINE_JUMP);
1295 mono_trampoline_code [MONO_TRAMPOLINE_CLASS_INIT] = create_trampoline_code (MONO_TRAMPOLINE_CLASS_INIT);
1296 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_CLASS_INIT] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_CLASS_INIT);
1297 mono_trampoline_code [MONO_TRAMPOLINE_RGCTX_LAZY_FETCH] = create_trampoline_code (MONO_TRAMPOLINE_RGCTX_LAZY_FETCH);
1298 #ifdef MONO_ARCH_AOT_SUPPORTED
1299 mono_trampoline_code [MONO_TRAMPOLINE_AOT] = create_trampoline_code (MONO_TRAMPOLINE_AOT);
1300 mono_trampoline_code [MONO_TRAMPOLINE_AOT_PLT] = create_trampoline_code (MONO_TRAMPOLINE_AOT_PLT);
1302 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1303 mono_trampoline_code [MONO_TRAMPOLINE_DELEGATE] = create_trampoline_code (MONO_TRAMPOLINE_DELEGATE);
1305 mono_trampoline_code [MONO_TRAMPOLINE_RESTORE_STACK_PROT] = create_trampoline_code (MONO_TRAMPOLINE_RESTORE_STACK_PROT);
1306 #ifndef DISABLE_REMOTING
1307 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING);
1309 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_ENTER] = create_trampoline_code (MONO_TRAMPOLINE_MONITOR_ENTER);
1310 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_EXIT] = create_trampoline_code (MONO_TRAMPOLINE_MONITOR_EXIT);
1311 mono_trampoline_code [MONO_TRAMPOLINE_VCALL] = create_trampoline_code (MONO_TRAMPOLINE_VCALL);
1312 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1313 mono_trampoline_code [MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD] = create_trampoline_code (MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD);
1314 mono_create_handler_block_trampoline ();
1317 mono_counters_register ("Calls to trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &trampoline_calls);
1318 mono_counters_register ("JIT trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &jit_trampolines);
1319 mono_counters_register ("Unbox trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &unbox_trampolines);
1320 mono_counters_register ("Static rgctx trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &static_rgctx_trampolines);
1324 mono_trampolines_cleanup (void)
1326 if (class_init_hash_addr)
1327 g_hash_table_destroy (class_init_hash_addr);
1328 if (rgctx_lazy_fetch_trampoline_hash)
1329 g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash);
1330 if (rgctx_lazy_fetch_trampoline_hash_addr)
1331 g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash_addr);
1333 DeleteCriticalSection (&trampolines_mutex);
1337 mono_get_trampoline_code (MonoTrampolineType tramp_type)
1339 g_assert (mono_trampoline_code [tramp_type]);
1341 return mono_trampoline_code [tramp_type];
1345 mono_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
1348 return mono_aot_create_specific_trampoline (mono_defaults.corlib, arg1, tramp_type, domain, code_len);
1350 return mono_arch_create_specific_trampoline (arg1, tramp_type, domain, code_len);
1354 mono_create_class_init_trampoline (MonoVTable *vtable)
1357 MonoDomain *domain = vtable->domain;
1359 g_assert (!vtable->klass->generic_container);
1361 /* previously created trampoline code */
1362 mono_domain_lock (domain);
1364 g_hash_table_lookup (domain_jit_info (domain)->class_init_trampoline_hash,
1366 mono_domain_unlock (domain);
1370 code = mono_create_specific_trampoline (vtable, MONO_TRAMPOLINE_CLASS_INIT, domain, NULL);
1372 ptr = mono_create_ftnptr (domain, code);
1374 /* store trampoline address */
1375 mono_domain_lock (domain);
1376 g_hash_table_insert (domain_jit_info (domain)->class_init_trampoline_hash,
1378 mono_domain_unlock (domain);
1380 mono_trampolines_lock ();
1381 if (!class_init_hash_addr)
1382 class_init_hash_addr = g_hash_table_new (NULL, NULL);
1383 g_hash_table_insert (class_init_hash_addr, ptr, vtable);
1384 mono_trampolines_unlock ();
1390 mono_create_generic_class_init_trampoline (void)
1392 #ifdef MONO_ARCH_VTABLE_REG
1393 static gpointer code;
1394 MonoTrampInfo *info;
1396 mono_trampolines_lock ();
1400 /* get_named_code () might return an ftnptr, but our caller expects a direct pointer */
1401 code = mono_get_addr_from_ftnptr (mono_aot_get_trampoline ("generic_class_init_trampoline"));
1403 code = mono_arch_create_generic_class_init_trampoline (&info, FALSE);
1404 mono_tramp_info_register (info);
1408 mono_trampolines_unlock ();
1412 g_assert_not_reached ();
1417 mono_create_jump_trampoline (MonoDomain *domain, MonoMethod *method, gboolean add_sync_wrapper)
1421 guint32 code_size = 0;
1423 code = mono_jit_find_compiled_method_with_jit_info (domain, method, &ji);
1425 * We cannot recover the correct type of a shared generic
1426 * method from its native code address, so we use the
1427 * trampoline instead.
1428 * For synchronized methods, the trampoline adds the wrapper.
1430 if (code && !ji->has_generic_jit_info && !(method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED))
1433 mono_domain_lock (domain);
1434 code = g_hash_table_lookup (domain_jit_info (domain)->jump_trampoline_hash, method);
1435 mono_domain_unlock (domain);
1439 code = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JUMP, mono_domain_get (), &code_size);
1440 g_assert (code_size);
1442 ji = mono_domain_alloc0 (domain, MONO_SIZEOF_JIT_INFO);
1443 ji->code_start = code;
1444 ji->code_size = code_size;
1445 ji->d.method = method;
1448 * mono_delegate_ctor needs to find the method metadata from the
1449 * trampoline address, so we save it here.
1452 mono_jit_info_table_add (domain, ji);
1454 mono_domain_lock (domain);
1455 g_hash_table_insert (domain_jit_info (domain)->jump_trampoline_hash, method, ji->code_start);
1456 mono_domain_unlock (domain);
1458 return ji->code_start;
1462 mono_create_jit_trampoline_in_domain (MonoDomain *domain, MonoMethod *method)
1466 if (mono_aot_only) {
1467 /* Avoid creating trampolines if possible */
1468 gpointer code = mono_jit_find_compiled_method (domain, method);
1474 mono_domain_lock (domain);
1475 tramp = g_hash_table_lookup (domain_jit_info (domain)->jit_trampoline_hash, method);
1476 mono_domain_unlock (domain);
1480 tramp = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JIT, domain, NULL);
1482 mono_domain_lock (domain);
1483 g_hash_table_insert (domain_jit_info (domain)->jit_trampoline_hash, method, tramp);
1484 mono_domain_unlock (domain);
1492 mono_create_jit_trampoline (MonoMethod *method)
1494 return mono_create_jit_trampoline_in_domain (mono_domain_get (), method);
1498 mono_create_jit_trampoline_from_token (MonoImage *image, guint32 token)
1502 MonoDomain *domain = mono_domain_get ();
1503 guint8 *buf, *start;
1505 buf = start = mono_domain_alloc0 (domain, 2 * sizeof (gpointer));
1507 *(gpointer*)(gpointer)buf = image;
1508 buf += sizeof (gpointer);
1509 *(guint32*)(gpointer)buf = token;
1511 tramp = mono_create_specific_trampoline (start, MONO_TRAMPOLINE_AOT, domain, NULL);
1520 * mono_create_delegate_trampoline_with_method:
1522 * Create a delegate trampoline for the KLASS+METHOD pair.
1525 mono_create_delegate_trampoline_with_method (MonoDomain *domain, MonoClass *klass, MonoMethod *method)
1527 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1529 guint32 code_size = 0;
1530 gpointer tramp_info;
1531 MonoClassMethodPair pair, *dpair;
1534 pair.method = method;
1535 mono_domain_lock (domain);
1536 ptr = g_hash_table_lookup (domain_jit_info (domain)->delegate_trampoline_hash, &pair);
1537 mono_domain_unlock (domain);
1541 tramp_info = create_delegate_trampoline_data (domain, klass, method);
1543 ptr = mono_create_specific_trampoline (tramp_info, MONO_TRAMPOLINE_DELEGATE, domain, &code_size);
1544 g_assert (code_size);
1546 dpair = mono_domain_alloc0 (domain, sizeof (MonoClassMethodPair));
1547 memcpy (dpair, &pair, sizeof (MonoClassMethodPair));
1549 /* store trampoline address */
1550 mono_domain_lock (domain);
1551 g_hash_table_insert (domain_jit_info (domain)->delegate_trampoline_hash, dpair, ptr);
1552 mono_domain_unlock (domain);
1561 mono_create_delegate_trampoline (MonoDomain *domain, MonoClass *klass)
1563 return mono_create_delegate_trampoline_with_method (domain, klass, NULL);
1567 mono_create_rgctx_lazy_fetch_trampoline (guint32 offset)
1569 static gboolean inited = FALSE;
1570 static int num_trampolines = 0;
1571 MonoTrampInfo *info;
1573 gpointer tramp, ptr;
1575 mono_trampolines_lock ();
1576 if (rgctx_lazy_fetch_trampoline_hash)
1577 tramp = g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset));
1580 mono_trampolines_unlock ();
1584 if (mono_aot_only) {
1585 ptr = mono_aot_get_lazy_fetch_trampoline (offset);
1587 tramp = mono_arch_create_rgctx_lazy_fetch_trampoline (offset, &info, FALSE);
1588 mono_tramp_info_register (info);
1589 ptr = mono_create_ftnptr (mono_get_root_domain (), tramp);
1592 mono_trampolines_lock ();
1593 if (!rgctx_lazy_fetch_trampoline_hash) {
1594 rgctx_lazy_fetch_trampoline_hash = g_hash_table_new (NULL, NULL);
1595 rgctx_lazy_fetch_trampoline_hash_addr = g_hash_table_new (NULL, NULL);
1597 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset), ptr);
1598 g_assert (offset != -1);
1599 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash_addr, ptr, GUINT_TO_POINTER (offset + 1));
1600 mono_trampolines_unlock ();
1603 mono_counters_register ("RGCTX num lazy fetch trampolines",
1604 MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_trampolines);
1613 mono_create_monitor_enter_trampoline (void)
1615 static gpointer code;
1617 if (mono_aot_only) {
1619 code = mono_aot_get_trampoline ("monitor_enter_trampoline");
1623 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
1624 mono_trampolines_lock ();
1627 MonoTrampInfo *info;
1629 code = mono_arch_create_monitor_enter_trampoline (&info, FALSE);
1630 mono_tramp_info_register (info);
1633 mono_trampolines_unlock ();
1636 g_assert_not_reached ();
1643 mono_create_monitor_exit_trampoline (void)
1645 static gpointer code;
1647 if (mono_aot_only) {
1649 code = mono_aot_get_trampoline ("monitor_exit_trampoline");
1653 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
1654 mono_trampolines_lock ();
1657 MonoTrampInfo *info;
1659 code = mono_arch_create_monitor_exit_trampoline (&info, FALSE);
1660 mono_tramp_info_register (info);
1663 mono_trampolines_unlock ();
1666 g_assert_not_reached ();
1671 #ifdef MONO_ARCH_LLVM_SUPPORTED
1673 * mono_create_llvm_imt_trampoline:
1675 * LLVM compiled code can't pass in the IMT argument, so we use this trampoline, which
1676 * sets the IMT argument, then branches to the contents of the vtable slot given by
1677 * vt_offset in the vtable which is obtained from the argument list.
1680 mono_create_llvm_imt_trampoline (MonoDomain *domain, MonoMethod *m, int vt_offset)
1682 #ifdef MONO_ARCH_HAVE_LLVM_IMT_TRAMPOLINE
1683 return mono_arch_get_llvm_imt_trampoline (domain, m, vt_offset);
1685 g_assert_not_reached ();
1692 mono_find_class_init_trampoline_by_addr (gconstpointer addr)
1696 mono_trampolines_lock ();
1697 if (class_init_hash_addr)
1698 res = g_hash_table_lookup (class_init_hash_addr, addr);
1701 mono_trampolines_unlock ();
1706 mono_find_rgctx_lazy_fetch_trampoline_by_addr (gconstpointer addr)
1710 mono_trampolines_lock ();
1711 if (rgctx_lazy_fetch_trampoline_hash_addr) {
1712 /* We store the real offset + 1 so we can detect when the lookup fails */
1713 offset = GPOINTER_TO_INT (g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash_addr, addr));
1721 mono_trampolines_unlock ();
1725 static const char*tramp_names [MONO_TRAMPOLINE_NUM] = {
1729 "generic_class_init",
1734 "restore_stack_prot",
1735 "generic_virtual_remoting",
1739 "handler_block_guard"
1743 * mono_get_generic_trampoline_name:
1745 * Returns a pointer to malloc-ed memory.
1748 mono_get_generic_trampoline_name (MonoTrampolineType tramp_type)
1750 return g_strdup_printf ("generic_trampoline_%s", tramp_names [tramp_type]);
1754 * mono_get_rgctx_fetch_trampoline_name:
1756 * Returns a pointer to malloc-ed memory.
1759 mono_get_rgctx_fetch_trampoline_name (int slot)
1764 mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
1765 index = MONO_RGCTX_SLOT_INDEX (slot);
1767 return g_strdup_printf ("rgctx_fetch_trampoline_%s_%d", mrgctx ? "mrgctx" : "rgctx", index);
1771 mini_get_nullified_class_init_trampoline (void)
1773 static gpointer nullified_class_init_trampoline;
1775 if (!nullified_class_init_trampoline) {
1777 MonoTrampInfo *info;
1779 if (mono_aot_only) {
1780 tramp = mono_aot_get_trampoline ("nullified_class_init_trampoline");
1782 tramp = mono_arch_get_nullified_class_init_trampoline (&info);
1783 mono_tramp_info_register (info);
1785 mono_memory_barrier ();
1786 nullified_class_init_trampoline = tramp;
1789 return nullified_class_init_trampoline;