2 * (C) 2003 Ximian, Inc.
3 * (C) 2003-2011 Novell, Inc.
4 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
9 #include <mono/metadata/appdomain.h>
10 #include <mono/metadata/metadata-internals.h>
11 #include <mono/metadata/marshal.h>
12 #include <mono/metadata/tabledefs.h>
13 #include <mono/utils/mono-counters.h>
14 #include <mono/utils/mono-error-internals.h>
15 #include <mono/utils/mono-membar.h>
16 #include <mono/utils/mono-compiler.h>
21 * Address of the trampoline code. This is used by the debugger to check
22 * whether a method is a trampoline.
24 guint8* mono_trampoline_code [MONO_TRAMPOLINE_NUM];
26 static GHashTable *class_init_hash_addr;
27 static GHashTable *rgctx_lazy_fetch_trampoline_hash;
28 static GHashTable *rgctx_lazy_fetch_trampoline_hash_addr;
29 static guint32 trampoline_calls, jit_trampolines, unbox_trampolines, static_rgctx_trampolines;
31 #define mono_trampolines_lock() mono_mutex_lock (&trampolines_mutex)
32 #define mono_trampolines_unlock() mono_mutex_unlock (&trampolines_mutex)
33 static mono_mutex_t trampolines_mutex;
35 #ifdef MONO_ARCH_GSHARED_SUPPORTED
43 rgctx_tramp_info_equal (gconstpointer ka, gconstpointer kb)
45 const RgctxTrampInfo *i1 = ka;
46 const RgctxTrampInfo *i2 = kb;
48 if (i1->m == i2->m && i1->addr == i2->addr)
55 rgctx_tramp_info_hash (gconstpointer data)
57 const RgctxTrampInfo *info = data;
59 return GPOINTER_TO_UINT (info->m) ^ GPOINTER_TO_UINT (info->addr);
63 * mono_create_static_rgctx_trampoline:
64 * @m: the mono method to create a trampoline for
65 * @addr: the address to jump to (where the compiled code for M lives)
67 * Creates a static rgctx trampoline for M which branches to ADDR which should
68 * point to the compiled code of M.
70 * Static rgctx trampolines are used when a shared generic method which doesn't
71 * have a this argument is called indirectly, ie. from code which can't pass in
72 * the rgctx argument. The trampoline sets the rgctx argument and jumps to the
73 * methods code. These trampolines are similar to the unbox trampolines, they
74 * perform the same task as the static rgctx wrappers, but they are smaller/faster,
75 * and can be made to work with full AOT.
77 * On PPC addr should be an ftnptr and the return value is an ftnptr too.
79 * Returns the generated static rgctx trampoline.
82 mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr)
87 RgctxTrampInfo tmp_info;
90 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
91 g_assert (((gpointer*)addr) [2] == 0);
94 ctx = mini_method_get_rgctx (m);
96 domain = mono_domain_get ();
99 * In the AOT case, addr might point to either the method, or to an unbox trampoline,
100 * so make the hash keyed on the m+addr pair.
102 mono_domain_lock (domain);
103 if (!domain_jit_info (domain)->static_rgctx_trampoline_hash)
104 domain_jit_info (domain)->static_rgctx_trampoline_hash = g_hash_table_new (rgctx_tramp_info_hash, rgctx_tramp_info_equal);
106 tmp_info.addr = addr;
107 res = g_hash_table_lookup (domain_jit_info (domain)->static_rgctx_trampoline_hash,
109 mono_domain_unlock (domain);
114 res = mono_aot_get_static_rgctx_trampoline (ctx, addr);
116 res = mono_arch_get_static_rgctx_trampoline (m, ctx, addr);
118 mono_domain_lock (domain);
119 /* Duplicates inserted while we didn't hold the lock are OK */
120 info = mono_domain_alloc (domain, sizeof (RgctxTrampInfo));
123 g_hash_table_insert (domain_jit_info (domain)->static_rgctx_trampoline_hash, info, res);
124 mono_domain_unlock (domain);
126 static_rgctx_trampolines ++;
132 mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr)
135 * This shouldn't happen as all arches which support generic sharing support
136 * static rgctx trampolines as well.
138 g_assert_not_reached ();
143 #define DEBUG_IMT(stmt) do { stmt; } while (0)
145 #define DEBUG_IMT(stmt) do { } while (0)
149 * mini_resolve_imt_method:
151 * Resolve the actual method called when making an IMT call through VTABLE_SLOT with IMT_METHOD as the interface method.
153 * Either IMPL_METHOD or OUT_AOT_ADDR will be set on return.
156 mini_resolve_imt_method (MonoVTable *vt, gpointer *vtable_slot, MonoMethod *imt_method, MonoMethod **impl_method, gpointer *out_aot_addr, gboolean *out_need_rgctx_tramp, MonoMethod **variant_iface)
158 MonoMethod *impl = NULL, *generic_virtual = NULL;
159 gboolean lookup_aot, variance_used = FALSE, need_rgctx_tramp = FALSE;
161 guint8 *aot_addr = NULL;
162 int displacement = vtable_slot - ((gpointer*)vt);
163 int interface_offset;
164 int imt_slot = MONO_IMT_SIZE + displacement;
166 g_assert (imt_slot < MONO_IMT_SIZE);
168 /* This has to be variance aware since imt_method can be from an interface that vt->klass doesn't directly implement */
169 interface_offset = mono_class_interface_offset_with_variance (vt->klass, imt_method->klass, &variance_used);
170 if (interface_offset < 0)
171 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));
173 *variant_iface = NULL;
174 if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) {
175 /* Generic virtual method */
176 generic_virtual = imt_method;
177 need_rgctx_tramp = TRUE;
178 } else if (variance_used && mono_class_has_variant_generic_params (imt_method->klass)) {
179 *variant_iface = imt_method;
183 /* We can only use the AOT compiled code if we don't require further processing */
184 lookup_aot = !generic_virtual & !variant_iface;
186 mono_vtable_build_imt_slot (vt, mono_method_get_imt_slot (imt_method));
188 if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) {
190 MonoGenericContext context = { NULL, NULL };
193 * Generic virtual method, imt_method contains the inflated interface
194 * method, need to get the inflated impl method.
196 /* imt_method->slot might not be set */
197 impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_declaring_generic_method (imt_method)->slot);
199 if (impl->klass->generic_class)
200 context.class_inst = impl->klass->generic_class->context.class_inst;
201 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
202 impl = mono_class_inflate_generic_method_checked (impl, &context, &error);
203 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */
205 /* Avoid loading metadata or creating a generic vtable if possible */
206 if (lookup_aot && !vt->klass->valuetype)
207 aot_addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, interface_offset + mono_method_get_vtable_slot (imt_method));
213 impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_vtable_slot (imt_method));
216 if (impl && mono_method_needs_static_rgctx_invoke (impl, FALSE))
217 need_rgctx_tramp = TRUE;
218 if (impl && impl->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED) {
219 WrapperInfo *info = mono_marshal_get_wrapper_info (impl);
221 if (info && info->subtype == WRAPPER_SUBTYPE_GENERIC_ARRAY_HELPER)
222 need_rgctx_tramp = TRUE;
225 *out_need_rgctx_tramp = need_rgctx_tramp;
226 *out_aot_addr = aot_addr;
228 DEBUG_IMT (printf ("mono_convert_imt_slot_to_vtable_slot: method = %s.%s.%s, imt_method = %s.%s.%s\n",
229 method->klass->name_space, method->klass->name, method->name,
230 imt_method->klass->name_space, imt_method->klass->name, imt_method->name));
232 if (vt->imt_collisions_bitmap & (1 << imt_slot)) {
233 int slot = mono_method_get_vtable_index (imt_method);
236 g_assert (slot != -1);
237 vtable_offset = interface_offset + slot;
238 vtable_slot = & (vt->vtable [vtable_offset]);
239 DEBUG_IMT (printf ("mono_convert_imt_slot_to_vtable_slot: slot %p[%d] is in the IMT, and colliding becomes %p[%d] (interface_offset = %d, method->slot = %d)\n", slot, imt_slot, vtable_slot, vtable_offset, interface_offset, imt_method->slot));
242 DEBUG_IMT (printf ("mono_convert_imt_slot_to_vtable_slot: slot %p[%d] is in the IMT, but not colliding\n", slot, imt_slot));
248 * This is a super-ugly hack to fix bug #616463.
250 * The problem is that we don't always set is_generic for generic
251 * method definitions. See the comment at the end of
252 * mono_class_inflate_generic_method_full_checked() in class.c.
255 is_generic_method_definition (MonoMethod *m)
257 MonoGenericContext *context;
263 context = mono_method_get_context (m);
264 if (!context->method_inst)
266 if (context->method_inst == mono_method_get_generic_container (((MonoMethodInflated*)m)->declaring)->context.method_inst)
272 mini_jit_info_is_gsharedvt (MonoJitInfo *ji)
274 if (ji && ji->has_generic_jit_info && (mono_jit_info_get_generic_sharing_context (ji)->is_gsharedvt))
281 * mini_add_method_trampoline:
284 * @add_static_rgctx_tramp: adds a static rgctx trampoline
285 * @add_unbox_tramp: adds an unboxing trampoline
287 * Add static rgctx/gsharedvt_in/unbox trampolines to
288 * M/COMPILED_METHOD if needed.
290 * Returns the trampoline address, or COMPILED_METHOD if no trampoline
294 mini_add_method_trampoline (MonoMethod *m, gpointer compiled_method, gboolean add_static_rgctx_tramp, gboolean add_unbox_tramp)
296 gpointer addr = compiled_method;
297 gboolean callee_gsharedvt, callee_array_helper;
298 MonoMethod *jmethod = NULL;
301 // FIXME: This loads information from AOT (perf problem)
302 ji = mini_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method), NULL);
303 callee_gsharedvt = mini_jit_info_is_gsharedvt (ji);
305 callee_array_helper = FALSE;
306 if (m->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED) {
307 WrapperInfo *info = mono_marshal_get_wrapper_info (m);
310 * generic array helpers.
311 * Have to replace the wrappers with the original generic instances.
313 if (info && info->subtype == WRAPPER_SUBTYPE_GENERIC_ARRAY_HELPER) {
314 callee_array_helper = TRUE;
315 m = info->d.generic_array_helper.method;
317 } else if (m->wrapper_type == MONO_WRAPPER_UNKNOWN) {
318 WrapperInfo *info = mono_marshal_get_wrapper_info (m);
320 /* Same for synchronized inner wrappers */
321 if (info && info->subtype == WRAPPER_SUBTYPE_SYNCHRONIZED_INNER) {
322 m = info->d.synchronized_inner.method;
326 if (callee_gsharedvt)
327 g_assert (m->is_inflated);
329 addr = compiled_method;
331 if (add_unbox_tramp) {
333 * The unbox trampolines call the method directly, so need to add
334 * an rgctx tramp before them.
337 addr = mono_aot_get_unbox_trampoline (m);
339 unbox_trampolines ++;
340 addr = mono_arch_get_unbox_trampoline (m, addr);
345 jmethod = jinfo_get_method (ji);
346 if (callee_gsharedvt && mini_is_gsharedvt_variable_signature (mono_method_signature (jmethod))) {
347 MonoGenericSharingContext *gsctx;
348 MonoMethodSignature *sig, *gsig;
350 /* Here m is a generic instance, while ji->method is the gsharedvt method implementing it */
352 /* Call from normal/gshared code to gsharedvt code with variable signature */
353 gsctx = mono_jit_info_get_generic_sharing_context (ji);
355 sig = mono_method_signature (m);
356 gsig = mono_method_signature (jmethod);
358 addr = mini_get_gsharedvt_wrapper (TRUE, addr, sig, gsig, gsctx, -1, FALSE);
360 //printf ("IN: %s\n", mono_method_full_name (m, TRUE));
363 if (callee_array_helper) {
364 add_static_rgctx_tramp = FALSE;
365 /* FIXME: ji->from_aot is not set for llvm methods */
366 if (ji && (ji->from_aot || mono_aot_only)) {
367 /* In AOT mode, compiled_method points to one of the InternalArray methods in Array. */
368 if (mono_method_needs_static_rgctx_invoke (jinfo_get_method (ji), TRUE))
369 add_static_rgctx_tramp = TRUE;
373 if (add_static_rgctx_tramp)
374 addr = mono_create_static_rgctx_trampoline (m, addr);
380 * common_call_trampoline:
382 * The code to handle normal, virtual, and interface method calls and jumps, both
383 * from JITted and LLVM compiled code.
386 common_call_trampoline_inner (mgreg_t *regs, guint8 *code, MonoMethod *m, MonoVTable *vt, gpointer *vtable_slot)
388 gpointer addr, compiled_method;
389 gboolean generic_shared = FALSE;
390 gboolean need_unbox_tramp = FALSE;
391 gboolean need_rgctx_tramp = FALSE;
392 MonoMethod *declaring = NULL;
393 MonoMethod *generic_virtual = NULL, *variant_iface = NULL;
395 gboolean imt_call, virtual;
396 gpointer *orig_vtable_slot, *vtable_slot_to_patch = NULL;
397 MonoJitInfo *ji = NULL;
399 virtual = vt && (gpointer)vtable_slot > (gpointer)vt;
400 imt_call = vt && (gpointer)vtable_slot < (gpointer)vt;
403 * rgctx trampolines are needed when the call is indirect so the caller can't pass
404 * the rgctx argument needed by the callee.
407 need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (m, FALSE);
409 orig_vtable_slot = vtable_slot;
410 vtable_slot_to_patch = vtable_slot;
414 MonoMethod *imt_method = NULL, *impl_method = NULL;
415 MonoObject *this_arg;
417 g_assert (vtable_slot);
419 imt_method = mono_arch_find_imt_method (regs, code);
420 this_arg = mono_arch_get_this_arg_from_call (regs, code);
422 if (mono_object_is_transparent_proxy (this_arg)) {
423 /* Use the slow path for now */
424 m = mono_object_get_virtual_method (this_arg, imt_method);
425 vtable_slot_to_patch = NULL;
427 if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) {
428 /* Generic virtual method */
429 generic_virtual = imt_method;
430 need_rgctx_tramp = TRUE;
433 vtable_slot = mini_resolve_imt_method (vt, vtable_slot, imt_method, &impl_method, &addr, &need_rgctx_tramp, &variant_iface);
434 /* This is the vcall slot which gets called through the IMT thunk */
435 vtable_slot_to_patch = vtable_slot;
439 * We found AOT compiled code for the method, skip the rest.
441 if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
444 return mono_create_ftnptr (mono_domain_get (), addr);
452 * The virtual check is needed because is_generic_method_definition (m) could
453 * return TRUE for methods used in IMT calls too.
455 if (virtual && is_generic_method_definition (m)) {
457 MonoGenericContext context = { NULL, NULL };
458 MonoMethod *declaring;
461 declaring = mono_method_get_declaring_generic_method (m);
465 if (m->klass->generic_class)
466 context.class_inst = m->klass->generic_class->context.class_inst;
468 g_assert (!m->klass->generic_container);
470 generic_virtual = mono_arch_find_imt_method (regs, code);
471 g_assert (generic_virtual);
472 g_assert (generic_virtual->is_inflated);
473 context.method_inst = ((MonoMethodInflated*)generic_virtual)->context.method_inst;
475 m = mono_class_inflate_generic_method_checked (declaring, &context, &error);
476 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */
477 /* FIXME: only do this if the method is sharable */
478 need_rgctx_tramp = TRUE;
479 } else if ((context_used = mono_method_check_context_used (m))) {
480 MonoClass *klass = NULL;
481 MonoMethod *actual_method = NULL;
482 MonoVTable *vt = NULL;
483 MonoGenericInst *method_inst = NULL;
486 generic_shared = TRUE;
491 * The caller is gshared code, compute the actual method to call from M and this/rgctx.
493 if (m->is_inflated && mono_method_get_context (m)->method_inst) {
494 MonoMethodRuntimeGenericContext *mrgctx = (MonoMethodRuntimeGenericContext*)mono_arch_find_static_call_vtable (regs, code);
496 klass = mrgctx->class_vtable->klass;
497 method_inst = mrgctx->method_inst;
498 } else if ((m->flags & METHOD_ATTRIBUTE_STATIC) || m->klass->valuetype) {
499 MonoVTable *vtable = mono_arch_find_static_call_vtable (regs, code);
501 klass = vtable->klass;
503 MonoObject *this_argument = mono_arch_get_this_arg_from_call (regs, code);
505 vt = this_argument->vtable;
506 vtable_slot = orig_vtable_slot;
508 g_assert (this_argument->vtable->klass->inited);
511 mono_class_setup_supertypes (this_argument->vtable->klass);
512 klass = this_argument->vtable->klass->supertypes [m->klass->idepth - 1];
516 g_assert (vtable_slot || klass);
519 int displacement = vtable_slot - ((gpointer*)vt);
521 g_assert_not_reached ();
523 g_assert (displacement > 0);
525 actual_method = vt->klass->vtable [displacement];
528 if (method_inst || m->wrapper_type) {
530 MonoGenericContext context = { NULL, NULL };
533 declaring = mono_method_get_declaring_generic_method (m);
537 if (klass->generic_class)
538 context.class_inst = klass->generic_class->context.class_inst;
539 else if (klass->generic_container)
540 context.class_inst = klass->generic_container->context.class_inst;
541 context.method_inst = method_inst;
543 actual_method = mono_class_inflate_generic_method_checked (declaring, &context, &error);
544 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */
546 actual_method = mono_class_get_method_generic (klass, m);
550 g_assert (actual_method);
551 g_assert (actual_method->klass == klass);
553 if (actual_method->is_inflated)
554 declaring = mono_method_get_declaring_generic_method (actual_method);
561 if (m->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) {
562 m = mono_marshal_get_synchronized_wrapper (m);
563 need_rgctx_tramp = FALSE;
566 /* Calls made through delegates on platforms without delegate trampolines */
567 if (!code && mono_method_needs_static_rgctx_invoke (m, FALSE))
568 need_rgctx_tramp = TRUE;
570 addr = compiled_method = mono_compile_method (m);
573 if (generic_virtual || variant_iface) {
574 if (vt->klass->valuetype) /*FIXME is this required variant iface?*/
575 need_unbox_tramp = TRUE;
576 } else if (orig_vtable_slot) {
577 if (m->klass->valuetype)
578 need_unbox_tramp = TRUE;
581 addr = mini_add_method_trampoline (m, compiled_method, need_rgctx_tramp, need_unbox_tramp);
583 if (generic_virtual || variant_iface) {
584 MonoMethod *target = generic_virtual ? generic_virtual : variant_iface;
586 vtable_slot = orig_vtable_slot;
587 g_assert (vtable_slot);
589 mono_method_add_generic_virtual_invocation (mono_domain_get (),
596 /* the method was jumped to */
598 MonoDomain *domain = mono_domain_get ();
600 /* Patch the got entries pointing to this method */
602 * We do this here instead of in mono_codegen () to cover the case when m
603 * was loaded from an aot image.
605 if (domain_jit_info (domain)->jump_target_got_slot_hash) {
608 mono_domain_lock (domain);
609 list = g_hash_table_lookup (domain_jit_info (domain)->jump_target_got_slot_hash, m);
611 for (tmp = list; tmp; tmp = tmp->next) {
612 gpointer *got_slot = tmp->data;
615 g_hash_table_remove (domain_jit_info (domain)->jump_target_got_slot_hash, m);
618 mono_domain_unlock (domain);
624 vtable_slot = orig_vtable_slot;
627 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))) {
628 g_assert (*vtable_slot_to_patch);
629 *vtable_slot_to_patch = mono_get_addr_from_ftnptr (addr);
632 guint8 *plt_entry = mono_aot_get_plt_entry (code);
633 gboolean no_patch = FALSE;
634 MonoJitInfo *target_ji;
637 if (generic_shared) {
639 mini_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method), NULL);
641 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
643 if (ji && target_ji && generic_shared && ji->has_generic_jit_info && !target_ji->has_generic_jit_info) {
648 mono_aot_patch_plt_entry (code, plt_entry, NULL, regs, addr);
650 if (generic_shared) {
651 if (m->wrapper_type != MONO_WRAPPER_NONE)
652 m = mono_marshal_method_from_wrapper (m);
653 //g_assert (mono_method_is_generic_sharable (m, FALSE));
656 /* Patch calling code */
658 mini_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method), NULL);
660 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
662 if (ji && target_ji && generic_shared && ji->has_generic_jit_info && !target_ji->has_generic_jit_info) {
664 * Can't patch the call as the caller is gshared, but the callee is not. Happens when
665 * generic sharing fails.
666 * FIXME: Performance problem.
671 if (!no_patch && mono_method_same_domain (ji, target_ji))
672 mono_arch_patch_callsite (ji->code_start, code, addr);
680 common_call_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, MonoVTable *vt, gpointer *vtable_slot)
683 MONO_PREPARE_RESET_BLOCKING;
684 res = common_call_trampoline_inner (regs, code, m, vt, vtable_slot);
685 MONO_FINISH_RESET_BLOCKING;
690 * mono_magic_trampoline:
692 * This trampoline handles normal calls from JITted code.
695 mono_magic_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp)
699 return common_call_trampoline (regs, code, arg, NULL, NULL);
703 * mono_vcall_trampoline:
705 * This trampoline handles virtual calls.
708 mono_vcall_trampoline (mgreg_t *regs, guint8 *code, int slot, guint8 *tramp)
712 gpointer *vtable_slot;
719 * We need to obtain the following pieces of information:
720 * - the method which needs to be compiled.
722 * We use one vtable trampoline per vtable slot index, so we need only the vtable,
723 * the other two can be computed from the vtable + the slot index.
727 * Obtain the vtable from the 'this' arg.
729 this = mono_arch_get_this_arg_from_call (regs, code);
735 /* Normal virtual call */
736 vtable_slot = &(vt->vtable [slot]);
738 /* Avoid loading metadata or creating a generic vtable if possible */
739 addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, slot);
740 if (addr && !vt->klass->valuetype) {
741 if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
744 return mono_create_ftnptr (mono_domain_get (), addr);
749 * is_generic_method_definition() above) also
750 * goes away if we do a
751 * mono_class_setup_vtable (vt->klass) here,
752 * because we then inflate the method
753 * correctly, put it in the cache, and the
754 * "wrong" inflation invocation still looks up
755 * the correctly inflated method.
757 * The hack above seems more stable and
760 m = mono_class_get_vtable_entry (vt->klass, slot);
763 vtable_slot = &(((gpointer*)vt) [slot]);
768 return common_call_trampoline (regs, code, m, vt, vtable_slot);
771 #ifndef DISABLE_REMOTING
773 mono_generic_virtual_remoting_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8 *tramp)
776 MonoGenericContext context = { NULL, NULL };
777 MonoMethod *imt_method, *declaring;
782 g_assert (m->is_generic);
785 declaring = mono_method_get_declaring_generic_method (m);
789 if (m->klass->generic_class)
790 context.class_inst = m->klass->generic_class->context.class_inst;
792 g_assert (!m->klass->generic_container);
794 imt_method = mono_arch_find_imt_method (regs, code);
795 if (imt_method->is_inflated)
796 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
797 m = mono_class_inflate_generic_method_checked (declaring, &context, &error);
798 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */;
799 m = mono_marshal_get_remoting_invoke_with_check (m);
801 addr = mono_compile_method (m);
809 * mono_aot_trampoline:
811 * This trampoline handles calls made from AOT code. We try to bypass the
812 * normal JIT compilation logic to avoid loading the metadata for the method.
814 #ifdef MONO_ARCH_AOT_SUPPORTED
816 mono_aot_trampoline (mgreg_t *regs, guint8 *code, guint8 *token_info,
821 MonoMethod *method = NULL;
827 image = *(gpointer*)(gpointer)token_info;
828 token_info += sizeof (gpointer);
829 token = *(guint32*)(gpointer)token_info;
831 addr = mono_aot_get_method_from_token (mono_domain_get (), image, token);
833 method = mono_get_method (image, token, NULL);
836 /* Use the generic code */
837 return mono_magic_trampoline (regs, code, method, tramp);
840 addr = mono_create_ftnptr (mono_domain_get (), addr);
842 /* This is a normal call through a PLT entry */
843 plt_entry = mono_aot_get_plt_entry (code);
844 g_assert (plt_entry);
846 mono_aot_patch_plt_entry (code, plt_entry, NULL, regs, addr);
852 * mono_aot_plt_trampoline:
854 * This trampoline handles calls made from AOT code through the PLT table.
857 mono_aot_plt_trampoline (mgreg_t *regs, guint8 *code, guint8 *aot_module,
860 guint32 plt_info_offset = mono_aot_get_plt_info_offset (regs, code);
865 res = mono_aot_plt_resolve (aot_module, plt_info_offset, code);
867 if (mono_loader_get_last_error ())
868 mono_raise_exception (mono_loader_error_prepare_exception (mono_loader_get_last_error ()));
869 // FIXME: Error handling (how ?)
878 * mono_class_init_trampoline:
880 * This method calls mono_runtime_class_init () to run the static constructor
881 * for the type, then patches the caller code so it is not called again.
884 mono_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp)
886 guint8 *plt_entry = mono_aot_get_plt_entry (code);
890 mono_runtime_class_init (vtable);
892 if (vtable->initialized) {
894 mono_aot_patch_plt_entry (code, plt_entry, NULL, regs, mini_get_nullified_class_init_trampoline ());
896 mono_arch_nullify_class_init_trampoline (code, regs);
901 * mono_generic_class_init_trampoline:
903 * This method calls mono_runtime_class_init () to run the static constructor
907 mono_generic_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp)
911 mono_runtime_class_init (vtable);
915 mono_rgctx_lazy_fetch_trampoline (mgreg_t *regs, guint8 *code, gpointer data, guint8 *tramp)
917 static gboolean inited = FALSE;
918 static int num_lookups = 0;
919 guint32 slot = GPOINTER_TO_UINT (data);
920 mgreg_t *r = (mgreg_t*)regs;
921 gpointer arg = (gpointer)(gssize)r [MONO_ARCH_VTABLE_REG];
922 guint32 index = MONO_RGCTX_SLOT_INDEX (slot);
923 gboolean mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
928 mono_counters_register ("RGCTX unmanaged lookups", MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_lookups);
935 return mono_method_fill_runtime_generic_context (arg, index);
937 return mono_class_fill_runtime_generic_context (arg, index);
941 mono_monitor_enter_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
943 mono_monitor_enter (obj);
947 mono_monitor_enter_v4_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
949 #ifdef MONO_ARCH_MONITOR_LOCK_TAKEN_REG
950 char *lock_taken = (char*)regs [MONO_ARCH_MONITOR_LOCK_TAKEN_REG];
951 mono_monitor_enter_v4 (obj, lock_taken);
953 g_assert_not_reached ();
958 mono_monitor_exit_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
960 mono_monitor_exit (obj);
964 * Precompute data to speed up mono_delegate_trampoline ().
965 * METHOD might be NULL.
967 static MonoDelegateTrampInfo*
968 create_delegate_trampoline_data (MonoDomain *domain, MonoClass *klass, MonoMethod *method)
970 MonoDelegateTrampInfo *tramp_data;
974 // Precompute the delegate invoke impl and pass it to the delegate trampoline
975 invoke = mono_get_delegate_invoke (klass);
978 tramp_data = mono_domain_alloc0 (domain, sizeof (MonoDelegateTrampInfo));
979 tramp_data->invoke = invoke;
980 tramp_data->invoke_sig = mono_method_signature (invoke);
981 tramp_data->impl_this = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), TRUE);
982 tramp_data->impl_nothis = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), FALSE);
983 tramp_data->method = method;
985 mono_error_init (&err);
986 tramp_data->sig = mono_method_signature_checked (method, &err);
987 tramp_data->need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (method, FALSE);
994 * mono_delegate_trampoline:
996 * This trampoline handles calls made to Delegate:Invoke ().
997 * This is called once the first time a delegate is invoked, so it must be fast.
1000 mono_delegate_trampoline (mgreg_t *regs, guint8 *code, gpointer *arg, guint8* tramp)
1002 MonoDomain *domain = mono_domain_get ();
1003 MonoDelegate *delegate;
1006 MonoMethod *method = NULL;
1007 gboolean multicast, callvirt = FALSE, closed_over_null = FALSE;
1008 gboolean need_rgctx_tramp = FALSE;
1009 gboolean need_unbox_tramp = FALSE;
1010 gboolean enable_caching = TRUE;
1011 MonoDelegateTrampInfo *tramp_info = (MonoDelegateTrampInfo*)arg;
1012 MonoMethod *invoke = tramp_info->invoke;
1013 guint8 *impl_this = tramp_info->impl_this;
1014 guint8 *impl_nothis = tramp_info->impl_nothis;
1016 MonoMethodSignature *sig;
1017 gpointer addr, compiled_method;
1018 gboolean is_remote = FALSE;
1020 trampoline_calls ++;
1022 /* Obtain the delegate object according to the calling convention */
1023 delegate = mono_arch_get_this_arg_from_call (regs, code);
1024 g_assert (mono_class_has_parent (mono_object_class (delegate), mono_defaults.multicastdelegate_class));
1026 if (delegate->method) {
1027 method = delegate->method;
1030 * delegate->method_ptr == NULL means the delegate was initialized by
1031 * mini_delegate_ctor, while != NULL means it is initialized by
1032 * mono_delegate_ctor_with_method (). In both cases, we need to add wrappers
1033 * (ctor_with_method () does this, but it doesn't store the wrapper back into
1034 * delegate->method).
1036 #ifndef DISABLE_REMOTING
1037 if (delegate->target && delegate->target->vtable->klass == mono_defaults.transparent_proxy_class) {
1040 if (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class != mono_class_get_com_object_class () &&
1041 !mono_class_is_com_object (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class))
1043 method = mono_marshal_get_remoting_invoke (method);
1047 sig = tramp_info->sig;
1048 if (!(sig && method == tramp_info->method)) {
1049 mono_error_init (&err);
1050 sig = mono_method_signature_checked (method, &err);
1052 mono_error_raise_exception (&err);
1055 if (sig->hasthis && method->klass->valuetype) {
1056 gboolean need_unbox = TRUE;
1058 if (tramp_info->invoke_sig->param_count > sig->param_count && tramp_info->invoke_sig->params [0]->byref)
1063 need_unbox_tramp = TRUE;
1065 method = mono_marshal_get_unbox_wrapper (method);
1070 ji = mono_jit_info_table_find (domain, mono_get_addr_from_ftnptr (delegate->method_ptr));
1072 method = jinfo_get_method (ji);
1076 sig = tramp_info->sig;
1077 if (!(sig && method == tramp_info->method)) {
1078 mono_error_init (&err);
1079 sig = mono_method_signature_checked (method, &err);
1081 mono_error_raise_exception (&err);
1084 callvirt = !delegate->target && sig->hasthis;
1086 closed_over_null = tramp_info->invoke_sig->param_count == sig->param_count;
1088 if (callvirt && !closed_over_null) {
1090 * The delegate needs to make a virtual call to the target method using its
1091 * first argument as the receiver. This is hard to support in full-aot, so
1092 * optimize it in some cases if possible.
1093 * If the target method is not virtual or is in a sealed class,
1094 * the vcall will call it directly.
1095 * If the call doesn't return a valuetype, then the vcall uses the same calling
1096 * convention as a normal call.
1098 if (((method->klass->flags & TYPE_ATTRIBUTE_SEALED) || !(method->flags & METHOD_ATTRIBUTE_VIRTUAL)) && !MONO_TYPE_ISSTRUCT (sig->ret)) {
1100 enable_caching = FALSE;
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 (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 /* Necessary for !code condition to fallback to slow path */
1144 multicast = ((MonoMulticastDelegate*)delegate)->delegates != NULL;
1145 if (!multicast && !callvirt) {
1146 if (method && (method->flags & METHOD_ATTRIBUTE_STATIC) && mono_method_signature (method)->param_count == mono_method_signature (invoke)->param_count + 1)
1147 /* Closed static delegate */
1150 code = delegate->target ? impl_this : impl_nothis;
1154 /* The general, unoptimized case */
1155 m = mono_marshal_get_delegate_invoke (invoke, delegate);
1156 code = mono_compile_method (m);
1157 code = mini_add_method_trampoline (m, code, mono_method_needs_static_rgctx_invoke (m, FALSE), FALSE);
1160 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
1161 if (enable_caching && !callvirt && tramp_info->method) {
1162 tramp_info->method_ptr = delegate->method_ptr;
1163 tramp_info->invoke_impl = delegate->invoke_impl;
1169 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1171 mono_handler_block_guard_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_info, guint8* tramp)
1175 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
1176 gpointer resume_ip = jit_tls->handler_block_return_address;
1178 memcpy (&ctx, &jit_tls->handler_block_context, sizeof (MonoContext));
1179 MONO_CONTEXT_SET_IP (&ctx, jit_tls->handler_block_return_address);
1181 jit_tls->handler_block_return_address = NULL;
1182 jit_tls->handler_block = NULL;
1184 if (!resume_ip) /*this should not happen, but we should avoid crashing */
1185 exc = mono_get_exception_execution_engine ("Invalid internal state, resuming abort after handler block but no resume ip found");
1187 exc = mono_thread_resume_interruption ();
1190 mono_handle_exception (&ctx, exc);
1191 mono_restore_context (&ctx);
1198 mono_create_handler_block_trampoline (void)
1200 static gpointer code;
1202 mono_memory_barrier ();
1206 g_assert (!mono_aot_only);
1208 mono_trampolines_lock ();
1211 MonoTrampInfo *info;
1214 tmp = mono_arch_create_handler_block_trampoline (&info, FALSE);
1215 mono_tramp_info_register (info);
1216 mono_memory_barrier ();
1219 mono_trampolines_unlock ();
1226 * mono_get_trampoline_func:
1228 * Return the C function which needs to be called by the generic trampoline of type
1232 mono_get_trampoline_func (MonoTrampolineType tramp_type)
1234 switch (tramp_type) {
1235 case MONO_TRAMPOLINE_JIT:
1236 case MONO_TRAMPOLINE_JUMP:
1237 return mono_magic_trampoline;
1238 case MONO_TRAMPOLINE_CLASS_INIT:
1239 return mono_class_init_trampoline;
1240 case MONO_TRAMPOLINE_GENERIC_CLASS_INIT:
1241 return mono_generic_class_init_trampoline;
1242 case MONO_TRAMPOLINE_RGCTX_LAZY_FETCH:
1243 return mono_rgctx_lazy_fetch_trampoline;
1244 #ifdef MONO_ARCH_AOT_SUPPORTED
1245 case MONO_TRAMPOLINE_AOT:
1246 return mono_aot_trampoline;
1247 case MONO_TRAMPOLINE_AOT_PLT:
1248 return mono_aot_plt_trampoline;
1250 case MONO_TRAMPOLINE_DELEGATE:
1251 return mono_delegate_trampoline;
1252 case MONO_TRAMPOLINE_RESTORE_STACK_PROT:
1253 return mono_altstack_restore_prot;
1254 #ifndef DISABLE_REMOTING
1255 case MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING:
1256 return mono_generic_virtual_remoting_trampoline;
1258 case MONO_TRAMPOLINE_MONITOR_ENTER:
1259 return mono_monitor_enter_trampoline;
1260 case MONO_TRAMPOLINE_MONITOR_ENTER_V4:
1261 return mono_monitor_enter_v4_trampoline;
1262 case MONO_TRAMPOLINE_MONITOR_EXIT:
1263 return mono_monitor_exit_trampoline;
1264 case MONO_TRAMPOLINE_VCALL:
1265 return mono_vcall_trampoline;
1266 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1267 case MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD:
1268 return mono_handler_block_guard_trampoline;
1271 g_assert_not_reached ();
1277 create_trampoline_code (MonoTrampolineType tramp_type)
1279 MonoTrampInfo *info;
1282 code = mono_arch_create_generic_trampoline (tramp_type, &info, FALSE);
1283 mono_tramp_info_register (info);
1289 mono_trampolines_init (void)
1291 mono_mutex_init_recursive (&trampolines_mutex);
1296 mono_trampoline_code [MONO_TRAMPOLINE_JIT] = create_trampoline_code (MONO_TRAMPOLINE_JIT);
1297 mono_trampoline_code [MONO_TRAMPOLINE_JUMP] = create_trampoline_code (MONO_TRAMPOLINE_JUMP);
1298 mono_trampoline_code [MONO_TRAMPOLINE_CLASS_INIT] = create_trampoline_code (MONO_TRAMPOLINE_CLASS_INIT);
1299 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_CLASS_INIT] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_CLASS_INIT);
1300 mono_trampoline_code [MONO_TRAMPOLINE_RGCTX_LAZY_FETCH] = create_trampoline_code (MONO_TRAMPOLINE_RGCTX_LAZY_FETCH);
1301 #ifdef MONO_ARCH_AOT_SUPPORTED
1302 mono_trampoline_code [MONO_TRAMPOLINE_AOT] = create_trampoline_code (MONO_TRAMPOLINE_AOT);
1303 mono_trampoline_code [MONO_TRAMPOLINE_AOT_PLT] = create_trampoline_code (MONO_TRAMPOLINE_AOT_PLT);
1305 mono_trampoline_code [MONO_TRAMPOLINE_DELEGATE] = create_trampoline_code (MONO_TRAMPOLINE_DELEGATE);
1306 mono_trampoline_code [MONO_TRAMPOLINE_RESTORE_STACK_PROT] = create_trampoline_code (MONO_TRAMPOLINE_RESTORE_STACK_PROT);
1307 #ifndef DISABLE_REMOTING
1308 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING);
1310 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_ENTER] = create_trampoline_code (MONO_TRAMPOLINE_MONITOR_ENTER);
1311 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_ENTER_V4] = create_trampoline_code (MONO_TRAMPOLINE_MONITOR_ENTER_V4);
1312 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_EXIT] = create_trampoline_code (MONO_TRAMPOLINE_MONITOR_EXIT);
1313 mono_trampoline_code [MONO_TRAMPOLINE_VCALL] = create_trampoline_code (MONO_TRAMPOLINE_VCALL);
1314 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1315 mono_trampoline_code [MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD] = create_trampoline_code (MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD);
1316 mono_create_handler_block_trampoline ();
1319 mono_counters_register ("Calls to trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &trampoline_calls);
1320 mono_counters_register ("JIT trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &jit_trampolines);
1321 mono_counters_register ("Unbox trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &unbox_trampolines);
1322 mono_counters_register ("Static rgctx trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &static_rgctx_trampolines);
1326 mono_trampolines_cleanup (void)
1328 if (class_init_hash_addr)
1329 g_hash_table_destroy (class_init_hash_addr);
1330 if (rgctx_lazy_fetch_trampoline_hash)
1331 g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash);
1332 if (rgctx_lazy_fetch_trampoline_hash_addr)
1333 g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash_addr);
1335 mono_mutex_destroy (&trampolines_mutex);
1339 mono_get_trampoline_code (MonoTrampolineType tramp_type)
1341 g_assert (mono_trampoline_code [tramp_type]);
1343 return mono_trampoline_code [tramp_type];
1347 mono_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
1350 return mono_aot_create_specific_trampoline (mono_defaults.corlib, arg1, tramp_type, domain, code_len);
1352 return mono_arch_create_specific_trampoline (arg1, tramp_type, domain, code_len);
1356 mono_create_class_init_trampoline (MonoVTable *vtable)
1359 MonoDomain *domain = vtable->domain;
1361 g_assert (!vtable->klass->generic_container);
1363 /* previously created trampoline code */
1364 mono_domain_lock (domain);
1366 g_hash_table_lookup (domain_jit_info (domain)->class_init_trampoline_hash,
1368 mono_domain_unlock (domain);
1372 code = mono_create_specific_trampoline (vtable, MONO_TRAMPOLINE_CLASS_INIT, domain, NULL);
1374 ptr = mono_create_ftnptr (domain, code);
1376 /* store trampoline address */
1377 mono_domain_lock (domain);
1378 g_hash_table_insert (domain_jit_info (domain)->class_init_trampoline_hash,
1380 mono_domain_unlock (domain);
1382 mono_trampolines_lock ();
1383 if (!class_init_hash_addr)
1384 class_init_hash_addr = g_hash_table_new (NULL, NULL);
1385 g_hash_table_insert (class_init_hash_addr, ptr, vtable);
1386 mono_trampolines_unlock ();
1392 mono_create_jump_trampoline (MonoDomain *domain, MonoMethod *method, gboolean add_sync_wrapper)
1396 guint32 code_size = 0;
1398 code = mono_jit_find_compiled_method_with_jit_info (domain, method, &ji);
1400 * We cannot recover the correct type of a shared generic
1401 * method from its native code address, so we use the
1402 * trampoline instead.
1403 * For synchronized methods, the trampoline adds the wrapper.
1405 if (code && !ji->has_generic_jit_info && !(method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED))
1408 mono_domain_lock (domain);
1409 code = g_hash_table_lookup (domain_jit_info (domain)->jump_trampoline_hash, method);
1410 mono_domain_unlock (domain);
1414 code = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JUMP, mono_domain_get (), &code_size);
1415 g_assert (code_size);
1417 ji = mono_domain_alloc0 (domain, MONO_SIZEOF_JIT_INFO);
1418 ji->code_start = code;
1419 ji->code_size = code_size;
1420 ji->d.method = method;
1423 * mono_delegate_ctor needs to find the method metadata from the
1424 * trampoline address, so we save it here.
1427 mono_jit_info_table_add (domain, ji);
1429 mono_domain_lock (domain);
1430 g_hash_table_insert (domain_jit_info (domain)->jump_trampoline_hash, method, ji->code_start);
1431 mono_domain_unlock (domain);
1433 return ji->code_start;
1437 mono_create_jit_trampoline_in_domain (MonoDomain *domain, MonoMethod *method)
1441 if (mono_aot_only) {
1442 /* Avoid creating trampolines if possible */
1443 gpointer code = mono_jit_find_compiled_method (domain, method);
1449 mono_domain_lock (domain);
1450 tramp = g_hash_table_lookup (domain_jit_info (domain)->jit_trampoline_hash, method);
1451 mono_domain_unlock (domain);
1455 tramp = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JIT, domain, NULL);
1457 mono_domain_lock (domain);
1458 g_hash_table_insert (domain_jit_info (domain)->jit_trampoline_hash, method, tramp);
1459 mono_domain_unlock (domain);
1467 mono_create_jit_trampoline (MonoMethod *method)
1469 return mono_create_jit_trampoline_in_domain (mono_domain_get (), method);
1473 mono_create_jit_trampoline_from_token (MonoImage *image, guint32 token)
1477 MonoDomain *domain = mono_domain_get ();
1478 guint8 *buf, *start;
1480 buf = start = mono_domain_alloc0 (domain, 2 * sizeof (gpointer));
1482 *(gpointer*)(gpointer)buf = image;
1483 buf += sizeof (gpointer);
1484 *(guint32*)(gpointer)buf = token;
1486 tramp = mono_create_specific_trampoline (start, MONO_TRAMPOLINE_AOT, domain, NULL);
1495 * mono_create_delegate_trampoline_info:
1497 * Create a delegate trampoline for the KLASS+METHOD pair.
1499 MonoDelegateTrampInfo*
1500 mono_create_delegate_trampoline_info (MonoDomain *domain, MonoClass *klass, MonoMethod *method)
1502 MonoDelegateTrampInfo *tramp_info;
1503 MonoClassMethodPair pair, *dpair;
1504 guint32 code_size = 0;
1507 pair.method = method;
1508 mono_domain_lock (domain);
1509 tramp_info = g_hash_table_lookup (domain_jit_info (domain)->delegate_trampoline_hash, &pair);
1510 mono_domain_unlock (domain);
1514 tramp_info = create_delegate_trampoline_data (domain, klass, method);
1516 tramp_info->invoke_impl = mono_create_specific_trampoline (tramp_info, MONO_TRAMPOLINE_DELEGATE, domain, &code_size);
1517 g_assert (code_size);
1519 dpair = mono_domain_alloc0 (domain, sizeof (MonoClassMethodPair));
1520 memcpy (dpair, &pair, sizeof (MonoClassMethodPair));
1522 /* store trampoline address */
1523 mono_domain_lock (domain);
1524 g_hash_table_insert (domain_jit_info (domain)->delegate_trampoline_hash, dpair, tramp_info);
1525 mono_domain_unlock (domain);
1531 mono_create_delegate_trampoline (MonoDomain *domain, MonoClass *klass)
1533 return mono_create_delegate_trampoline_info (domain, klass, NULL)->invoke_impl;
1537 mono_create_delegate_virtual_trampoline (MonoDomain *domain, MonoClass *klass, MonoMethod *method)
1539 MonoMethod *invoke = mono_get_delegate_invoke (klass);
1542 return mono_get_delegate_virtual_invoke_impl (mono_method_signature (invoke), method);
1546 mono_create_rgctx_lazy_fetch_trampoline (guint32 offset)
1548 static gboolean inited = FALSE;
1549 static int num_trampolines = 0;
1550 MonoTrampInfo *info;
1552 gpointer tramp, ptr;
1554 mono_trampolines_lock ();
1555 if (rgctx_lazy_fetch_trampoline_hash)
1556 tramp = g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset));
1559 mono_trampolines_unlock ();
1563 if (mono_aot_only) {
1564 ptr = mono_aot_get_lazy_fetch_trampoline (offset);
1566 tramp = mono_arch_create_rgctx_lazy_fetch_trampoline (offset, &info, FALSE);
1567 mono_tramp_info_register (info);
1568 ptr = mono_create_ftnptr (mono_get_root_domain (), tramp);
1571 mono_trampolines_lock ();
1572 if (!rgctx_lazy_fetch_trampoline_hash) {
1573 rgctx_lazy_fetch_trampoline_hash = g_hash_table_new (NULL, NULL);
1574 rgctx_lazy_fetch_trampoline_hash_addr = g_hash_table_new (NULL, NULL);
1576 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset), ptr);
1577 g_assert (offset != -1);
1578 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash_addr, ptr, GUINT_TO_POINTER (offset + 1));
1579 mono_trampolines_unlock ();
1582 mono_counters_register ("RGCTX num lazy fetch trampolines",
1583 MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_trampolines);
1592 mono_create_monitor_enter_trampoline (void)
1594 static gpointer code;
1596 if (mono_aot_only) {
1598 code = mono_aot_get_trampoline ("monitor_enter_trampoline");
1602 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
1603 mono_trampolines_lock ();
1606 MonoTrampInfo *info;
1608 code = mono_arch_create_monitor_enter_trampoline (&info, FALSE, FALSE);
1609 mono_tramp_info_register (info);
1612 mono_trampolines_unlock ();
1615 g_assert_not_reached ();
1622 mono_create_monitor_enter_v4_trampoline (void)
1624 static gpointer code;
1626 if (mono_aot_only) {
1628 code = mono_aot_get_trampoline ("monitor_enter_v4_trampoline");
1632 #if defined(MONO_ARCH_MONITOR_OBJECT_REG) && defined(MONO_ARCH_MONITOR_LOCK_TAKEN_REG)
1633 mono_trampolines_lock ();
1636 MonoTrampInfo *info;
1638 code = mono_arch_create_monitor_enter_trampoline (&info, TRUE, FALSE);
1639 mono_tramp_info_register (info);
1642 mono_trampolines_unlock ();
1645 g_assert_not_reached ();
1652 mono_create_monitor_exit_trampoline (void)
1654 static gpointer code;
1656 if (mono_aot_only) {
1658 code = mono_aot_get_trampoline ("monitor_exit_trampoline");
1662 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
1663 mono_trampolines_lock ();
1666 MonoTrampInfo *info;
1668 code = mono_arch_create_monitor_exit_trampoline (&info, FALSE);
1669 mono_tramp_info_register (info);
1672 mono_trampolines_unlock ();
1675 g_assert_not_reached ();
1680 #ifdef MONO_ARCH_LLVM_SUPPORTED
1682 * mono_create_llvm_imt_trampoline:
1684 * LLVM compiled code can't pass in the IMT argument, so we use this trampoline, which
1685 * sets the IMT argument, then branches to the contents of the vtable slot given by
1686 * vt_offset in the vtable which is obtained from the argument list.
1689 mono_create_llvm_imt_trampoline (MonoDomain *domain, MonoMethod *m, int vt_offset)
1691 #ifdef MONO_ARCH_HAVE_LLVM_IMT_TRAMPOLINE
1692 return mono_arch_get_llvm_imt_trampoline (domain, m, vt_offset);
1694 g_assert_not_reached ();
1701 mono_find_class_init_trampoline_by_addr (gconstpointer addr)
1705 mono_trampolines_lock ();
1706 if (class_init_hash_addr)
1707 res = g_hash_table_lookup (class_init_hash_addr, addr);
1710 mono_trampolines_unlock ();
1715 mono_find_rgctx_lazy_fetch_trampoline_by_addr (gconstpointer addr)
1719 mono_trampolines_lock ();
1720 if (rgctx_lazy_fetch_trampoline_hash_addr) {
1721 /* We store the real offset + 1 so we can detect when the lookup fails */
1722 offset = GPOINTER_TO_INT (g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash_addr, addr));
1730 mono_trampolines_unlock ();
1734 static const char*tramp_names [MONO_TRAMPOLINE_NUM] = {
1738 "generic_class_init",
1743 "restore_stack_prot",
1744 "generic_virtual_remoting",
1749 "handler_block_guard"
1753 * mono_get_generic_trampoline_simple_name:
1757 mono_get_generic_trampoline_simple_name (MonoTrampolineType tramp_type)
1759 return tramp_names [tramp_type];
1763 * mono_get_generic_trampoline_name:
1765 * Returns a pointer to malloc-ed memory.
1768 mono_get_generic_trampoline_name (MonoTrampolineType tramp_type)
1770 return g_strdup_printf ("generic_trampoline_%s", tramp_names [tramp_type]);
1774 * mono_get_rgctx_fetch_trampoline_name:
1776 * Returns a pointer to malloc-ed memory.
1779 mono_get_rgctx_fetch_trampoline_name (int slot)
1784 mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
1785 index = MONO_RGCTX_SLOT_INDEX (slot);
1787 return g_strdup_printf ("rgctx_fetch_trampoline_%s_%d", mrgctx ? "mrgctx" : "rgctx", index);
1791 mini_get_nullified_class_init_trampoline (void)
1793 static gpointer nullified_class_init_trampoline;
1795 if (!nullified_class_init_trampoline) {
1797 MonoTrampInfo *info;
1799 if (mono_aot_only) {
1801 g_assert_not_reached ();
1804 tramp = mono_arch_get_nullified_class_init_trampoline (&info);
1805 mono_tramp_info_register (info);
1807 mono_memory_barrier ();
1808 nullified_class_init_trampoline = tramp;
1811 return nullified_class_init_trampoline;
1815 * mini_get_single_step_trampoline:
1817 * Return a trampoline which calls debugger_agent_single_step_from_context ().
1820 mini_get_single_step_trampoline (void)
1822 static gpointer trampoline;
1827 if (mono_aot_only) {
1828 tramp = mono_aot_get_trampoline ("sdb_single_step_trampoline");
1830 #ifdef MONO_ARCH_HAVE_SDB_TRAMPOLINES
1831 MonoTrampInfo *info;
1832 tramp = mono_arch_create_sdb_trampoline (TRUE, &info, FALSE);
1833 mono_tramp_info_register (info);
1836 g_assert_not_reached ();
1839 mono_memory_barrier ();
1847 * mini_get_breakpoint_trampoline:
1849 * Return a trampoline which calls debugger_agent_breakpoint_from_context ().
1852 mini_get_breakpoint_trampoline (void)
1854 static gpointer trampoline;
1859 if (mono_aot_only) {
1860 tramp = mono_aot_get_trampoline ("sdb_breakpoint_trampoline");
1862 #ifdef MONO_ARCH_HAVE_SDB_TRAMPOLINES
1863 MonoTrampInfo *info;
1864 tramp = mono_arch_create_sdb_trampoline (FALSE, &info, FALSE);
1865 mono_tramp_info_register (info);
1868 g_assert_not_reached ();
1871 mono_memory_barrier ();