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 * Either IMPL_METHOD or AOT_ADDR will be set on return.
145 * MONO_NEVER_INLINE :
146 * This works against problems when compiling with gcc 4.6 on arm. The 'then' part of
147 * this line gets executed, even when the condition is false:
148 * if (impl && mono_method_needs_static_rgctx_invoke (impl, FALSE))
149 * *need_rgctx_tramp = TRUE;
151 static MONO_NEVER_INLINE gpointer*
152 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)
154 MonoObject *this_argument = mono_arch_get_this_arg_from_call (regs, code);
155 MonoVTable *vt = this_argument->vtable;
156 int displacement = slot - ((gpointer*)vt);
158 if (displacement > 0) {
159 /* slot is in the vtable, not in the IMT */
161 printf ("mono_convert_imt_slot_to_vtable_slot: slot %p is in the vtable, not in the IMT\n", slot);
165 MonoMethod *imt_method = mono_arch_find_imt_method (regs, code);
167 int interface_offset;
168 int imt_slot = MONO_IMT_SIZE + displacement;
170 /*This has to be variance aware since imt_method can be from an interface that vt->klass doesn't directly implement*/
171 interface_offset = mono_class_interface_offset_with_variance (vt->klass, imt_method->klass, variance_used);
173 if (interface_offset < 0) {
174 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));
176 mono_vtable_build_imt_slot (vt, mono_method_get_imt_slot (imt_method));
178 if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) {
179 MonoGenericContext context = { NULL, NULL };
182 * Generic virtual method, imt_method contains the inflated interface
183 * method, need to get the inflated impl method.
185 /* imt_method->slot might not be set */
186 impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_declaring_generic_method (imt_method)->slot);
188 if (impl->klass->generic_class)
189 context.class_inst = impl->klass->generic_class->context.class_inst;
190 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
191 impl = mono_class_inflate_generic_method (impl, &context);
193 /* Avoid loading metadata or creating a generic vtable if possible */
194 if (lookup_aot && !vt->klass->valuetype)
195 *aot_addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, interface_offset + mono_method_get_vtable_slot (imt_method));
201 impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_vtable_slot (imt_method));
204 if (impl && mono_method_needs_static_rgctx_invoke (impl, FALSE))
205 *need_rgctx_tramp = TRUE;
206 if (impl && impl->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED) {
207 WrapperInfo *info = mono_marshal_get_wrapper_info (impl);
209 if (info && info->subtype == WRAPPER_SUBTYPE_GENERIC_ARRAY_HELPER) {
210 *need_rgctx_tramp = TRUE;
216 printf ("mono_convert_imt_slot_to_vtable_slot: method = %s.%s.%s, imt_method = %s.%s.%s\n",
217 method->klass->name_space, method->klass->name, method->name,
218 imt_method->klass->name_space, imt_method->klass->name, imt_method->name);
221 g_assert (imt_slot < MONO_IMT_SIZE);
222 if (vt->imt_collisions_bitmap & (1 << imt_slot)) {
223 int slot = mono_method_get_vtable_index (imt_method);
225 gpointer *vtable_slot;
227 g_assert (slot != -1);
228 vtable_offset = interface_offset + slot;
229 vtable_slot = & (vt->vtable [vtable_offset]);
231 printf ("mono_convert_imt_slot_to_vtable_slot: slot %p[%d] is in the IMT, and colliding becomes %p[%d] (interface_offset = %d, method->slot = %d)\n", slot, imt_slot, vtable_slot, vtable_offset, interface_offset, imt_method->slot);
236 printf ("mono_convert_imt_slot_to_vtable_slot: slot %p[%d] is in the IMT, but not colliding\n", slot, imt_slot);
244 * This is a super-ugly hack to fix bug #616463.
246 * The problem is that we don't always set is_generic for generic
247 * method definitions. See the comment at the end of
248 * mono_class_inflate_generic_method_full_checked() in class.c.
251 is_generic_method_definition (MonoMethod *m)
253 MonoGenericContext *context;
259 context = mono_method_get_context (m);
260 if (!context->method_inst)
262 if (context->method_inst == mono_method_get_generic_container (((MonoMethodInflated*)m)->declaring)->context.method_inst)
268 mini_jit_info_is_gsharedvt (MonoJitInfo *ji)
270 if (ji && ji->has_generic_jit_info && (mono_jit_info_get_generic_sharing_context (ji)->var_is_vt ||
271 mono_jit_info_get_generic_sharing_context (ji)->mvar_is_vt))
278 * mini_add_method_trampoline:
279 * @orig_method: the method the caller originally called i.e. an iface method, or NULL.
282 * @add_static_rgctx_tramp: adds a static rgctx trampoline
283 * @add_unbox_tramp: adds an unboxing trampoline
285 * Add static rgctx/gsharedvt_in/unbox trampolines to
286 * M/COMPILED_METHOD if needed.
288 * Returns the trampoline address, or COMPILED_METHOD if no trampoline
292 mini_add_method_trampoline (MonoMethod *orig_method, MonoMethod *m, gpointer compiled_method, gboolean add_static_rgctx_tramp, gboolean add_unbox_tramp)
294 gpointer addr = compiled_method;
295 gboolean callee_gsharedvt, callee_array_helper;
296 MonoMethod *jmethod = NULL;
299 // FIXME: This loads information from AOT (perf problem)
300 ji = mini_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method), NULL);
301 callee_gsharedvt = mini_jit_info_is_gsharedvt (ji);
303 callee_array_helper = FALSE;
304 if (m->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED) {
305 WrapperInfo *info = mono_marshal_get_wrapper_info (m);
308 * generic array helpers.
309 * Have to replace the wrappers with the original generic instances.
311 if (info && info->subtype == WRAPPER_SUBTYPE_GENERIC_ARRAY_HELPER) {
312 callee_array_helper = TRUE;
313 m = info->d.generic_array_helper.method;
315 } else if (m->wrapper_type == MONO_WRAPPER_UNKNOWN) {
316 WrapperInfo *info = mono_marshal_get_wrapper_info (m);
318 /* Same for synchronized inner wrappers */
319 if (info && info->subtype == WRAPPER_SUBTYPE_SYNCHRONIZED_INNER) {
320 m = info->d.synchronized_inner.method;
327 if (callee_gsharedvt)
328 g_assert (m->is_inflated);
330 addr = compiled_method;
332 if (add_unbox_tramp) {
334 * The unbox trampolines call the method directly, so need to add
335 * an rgctx tramp before them.
338 addr = mono_aot_get_unbox_trampoline (m);
340 unbox_trampolines ++;
341 addr = mono_arch_get_unbox_trampoline (m, addr);
346 jmethod = jinfo_get_method (ji);
347 if (callee_gsharedvt && mini_is_gsharedvt_variable_signature (mono_method_signature (jmethod))) {
348 MonoGenericSharingContext *gsctx;
349 MonoMethodSignature *sig, *gsig;
351 /* Here m is a generic instance, while ji->method is the gsharedvt method implementing it */
353 /* Call from normal/gshared code to gsharedvt code with variable signature */
354 gsctx = mono_jit_info_get_generic_sharing_context (ji);
356 sig = mono_method_signature (m);
357 gsig = mono_method_signature (jmethod);
359 addr = mini_get_gsharedvt_wrapper (TRUE, addr, sig, gsig, gsctx, -1, FALSE);
361 //printf ("IN: %s\n", mono_method_full_name (m, TRUE));
364 if (callee_array_helper) {
365 add_static_rgctx_tramp = FALSE;
366 /* FIXME: ji->from_aot is not set for llvm methods */
367 if (ji && (ji->from_aot || mono_aot_only)) {
368 /* In AOT mode, compiled_method points to one of the InternalArray methods in Array. */
369 if (mono_method_needs_static_rgctx_invoke (jinfo_get_method (ji), TRUE))
370 add_static_rgctx_tramp = TRUE;
374 if (add_static_rgctx_tramp)
375 addr = mono_create_static_rgctx_trampoline (m, addr);
381 * common_call_trampoline:
383 * The code to handle normal, virtual, and interface method calls and jumps, both
384 * from JITted and LLVM compiled code.
387 common_call_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8* tramp, MonoVTable *vt, gpointer *vtable_slot, gboolean need_rgctx_tramp)
389 gpointer addr, compiled_method;
390 gboolean generic_shared = FALSE;
391 gboolean need_unbox_tramp = FALSE;
392 MonoMethod *declaring = NULL;
393 MonoMethod *generic_virtual = NULL, *variant_iface = NULL, *orig_method = NULL;
395 gboolean virtual, variance_used = FALSE;
396 gpointer *orig_vtable_slot, *vtable_slot_to_patch = NULL;
397 MonoJitInfo *ji = NULL;
399 virtual = (gpointer)vtable_slot > (gpointer)vt;
401 orig_vtable_slot = vtable_slot;
402 vtable_slot_to_patch = vtable_slot;
405 if (vt && (gpointer)vtable_slot < (gpointer)vt) {
406 MonoMethod *impl_method = NULL;
407 MonoObject *this_arg;
409 /* we get the interface method because mono_convert_imt_slot_to_vtable_slot ()
410 * needs the signature to be able to find the this argument
412 m = mono_arch_find_imt_method (regs, code);
413 vtable_slot = orig_vtable_slot;
414 g_assert (vtable_slot);
418 this_arg = mono_arch_get_this_arg_from_call (regs, code);
420 if (mono_object_is_transparent_proxy (this_arg)) {
421 /* Use the slow path for now */
422 m = mono_object_get_virtual_method (this_arg, m);
423 vtable_slot_to_patch = NULL;
427 mono_class_interface_offset_with_variance (vt->klass, m->klass, &variance_used);
429 if (m->is_inflated && ((MonoMethodInflated*)m)->context.method_inst) {
430 /* Generic virtual method */
432 need_rgctx_tramp = TRUE;
433 } else if (variance_used && mono_class_has_variant_generic_params (m->klass)) {
438 /* We can only use the AOT compiled code if we don't require further processing */
439 lookup_aot = !generic_virtual & !variant_iface;
440 vtable_slot = mono_convert_imt_slot_to_vtable_slot (vtable_slot, regs, code, m, lookup_aot, &impl_method, &need_rgctx_tramp, &variance_used, &addr);
441 /* This is the vcall slot which gets called through the IMT thunk */
442 vtable_slot_to_patch = vtable_slot;
443 /* mono_convert_imt_slot_to_vtable_slot () also gives us the method that is supposed
444 * to be called, so we compile it and go ahead as usual.
446 /*g_print ("imt found method %p (%s) at %p\n", impl_method, impl_method->name, code);*/
450 * We found AOT compiled code for the method, skip the rest.
452 if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
455 return mono_create_ftnptr (mono_domain_get (), addr);
463 * The virtual check is needed because is_generic_method_definition (m) could
464 * return TRUE for methods used in IMT calls too.
466 if (virtual && is_generic_method_definition (m)) {
467 MonoGenericContext context = { NULL, NULL };
468 MonoMethod *declaring;
471 declaring = mono_method_get_declaring_generic_method (m);
475 if (m->klass->generic_class)
476 context.class_inst = m->klass->generic_class->context.class_inst;
478 g_assert (!m->klass->generic_container);
480 generic_virtual = mono_arch_find_imt_method (regs, code);
481 if (generic_virtual) {
482 g_assert (generic_virtual->is_inflated);
483 context.method_inst = ((MonoMethodInflated*)generic_virtual)->context.method_inst;
486 m = mono_class_inflate_generic_method (declaring, &context);
487 /* FIXME: only do this if the method is sharable */
488 need_rgctx_tramp = TRUE;
489 } else if ((context_used = mono_method_check_context_used (m))) {
490 MonoClass *klass = NULL;
491 MonoMethod *actual_method = NULL;
492 MonoVTable *vt = NULL;
493 MonoGenericInst *method_inst = NULL;
496 generic_shared = TRUE;
500 if (m->is_inflated && mono_method_get_context (m)->method_inst) {
501 #ifdef MONO_ARCH_RGCTX_REG
502 MonoMethodRuntimeGenericContext *mrgctx = (MonoMethodRuntimeGenericContext*)mono_arch_find_static_call_vtable (regs, code);
504 klass = mrgctx->class_vtable->klass;
505 method_inst = mrgctx->method_inst;
507 g_assert_not_reached ();
509 } else if ((m->flags & METHOD_ATTRIBUTE_STATIC) || m->klass->valuetype) {
510 #ifdef MONO_ARCH_RGCTX_REG
511 MonoVTable *vtable = mono_arch_find_static_call_vtable (regs, code);
513 klass = vtable->klass;
515 g_assert_not_reached ();
518 MonoObject *this_argument = mono_arch_get_this_arg_from_call (regs, code);
520 vt = this_argument->vtable;
521 vtable_slot = orig_vtable_slot;
523 g_assert (this_argument->vtable->klass->inited);
524 //mono_class_init (this_argument->vtable->klass);
527 mono_class_setup_supertypes (this_argument->vtable->klass);
528 klass = this_argument->vtable->klass->supertypes [m->klass->idepth - 1];
532 g_assert (vtable_slot || klass);
535 int displacement = vtable_slot - ((gpointer*)vt);
537 g_assert_not_reached ();
539 g_assert (displacement > 0);
541 actual_method = vt->klass->vtable [displacement];
544 if (method_inst || m->wrapper_type) {
545 MonoGenericContext context = { NULL, NULL };
548 declaring = mono_method_get_declaring_generic_method (m);
552 if (klass->generic_class)
553 context.class_inst = klass->generic_class->context.class_inst;
554 else if (klass->generic_container)
555 context.class_inst = klass->generic_container->context.class_inst;
556 context.method_inst = method_inst;
558 actual_method = mono_class_inflate_generic_method (declaring, &context);
560 actual_method = mono_class_get_method_generic (klass, m);
564 g_assert (actual_method);
565 g_assert (actual_method->klass == klass);
567 if (actual_method->is_inflated)
568 declaring = mono_method_get_declaring_generic_method (actual_method);
575 if (m->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) {
576 m = mono_marshal_get_synchronized_wrapper (m);
577 need_rgctx_tramp = FALSE;
580 /* Calls made through delegates on platforms without delegate trampolines */
581 if (!code && mono_method_needs_static_rgctx_invoke (m, FALSE))
582 need_rgctx_tramp = TRUE;
584 addr = compiled_method = mono_compile_method (m);
587 if (generic_virtual || variant_iface) {
588 if (vt->klass->valuetype) /*FIXME is this required variant iface?*/
589 need_unbox_tramp = TRUE;
590 } else if (orig_vtable_slot) {
591 if (m->klass->valuetype)
592 need_unbox_tramp = TRUE;
595 addr = mini_add_method_trampoline (orig_method, m, compiled_method, need_rgctx_tramp, need_unbox_tramp);
597 if (generic_virtual || variant_iface) {
598 MonoMethod *target = generic_virtual ? generic_virtual : variant_iface;
600 vtable_slot = orig_vtable_slot;
601 g_assert (vtable_slot);
603 mono_method_add_generic_virtual_invocation (mono_domain_get (),
610 /* the method was jumped to */
612 MonoDomain *domain = mono_domain_get ();
614 /* Patch the got entries pointing to this method */
616 * We do this here instead of in mono_codegen () to cover the case when m
617 * was loaded from an aot image.
619 if (domain_jit_info (domain)->jump_target_got_slot_hash) {
622 mono_domain_lock (domain);
623 list = g_hash_table_lookup (domain_jit_info (domain)->jump_target_got_slot_hash, m);
625 for (tmp = list; tmp; tmp = tmp->next) {
626 gpointer *got_slot = tmp->data;
629 g_hash_table_remove (domain_jit_info (domain)->jump_target_got_slot_hash, m);
632 mono_domain_unlock (domain);
638 vtable_slot = orig_vtable_slot;
641 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))) {
642 g_assert (*vtable_slot_to_patch);
643 *vtable_slot_to_patch = mono_get_addr_from_ftnptr (addr);
647 guint8 *plt_entry = mono_aot_get_plt_entry (code);
648 gboolean no_patch = FALSE;
649 MonoJitInfo *target_ji;
652 if (generic_shared) {
654 mini_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method), NULL);
656 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
658 if (ji && target_ji && generic_shared && ji->has_generic_jit_info && !target_ji->has_generic_jit_info) {
663 mono_aot_patch_plt_entry (code, plt_entry, NULL, regs, addr);
665 if (generic_shared) {
666 if (m->wrapper_type != MONO_WRAPPER_NONE)
667 m = mono_marshal_method_from_wrapper (m);
668 //g_assert (mono_method_is_generic_sharable (m, FALSE));
671 /* Patch calling code */
673 mini_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method), NULL);
675 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
677 if (ji && target_ji && generic_shared && ji->has_generic_jit_info && !target_ji->has_generic_jit_info) {
679 * Can't patch the call as the caller is gshared, but the callee is not. Happens when
680 * generic sharing fails.
681 * FIXME: Performance problem.
686 if (!no_patch && mono_method_same_domain (ji, target_ji))
687 mono_arch_patch_callsite (ji->code_start, code, addr);
695 * mono_magic_trampoline:
697 * This trampoline handles normal calls from JITted code.
700 mono_magic_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp)
704 return common_call_trampoline (regs, code, arg, tramp, NULL, NULL, FALSE);
708 * mono_vcall_trampoline:
710 * This trampoline handles virtual calls.
713 mono_vcall_trampoline (mgreg_t *regs, guint8 *code, int slot, guint8 *tramp)
717 gpointer *vtable_slot;
719 gboolean need_rgctx_tramp = FALSE;
725 * We need to obtain the following pieces of information:
726 * - the method which needs to be compiled.
728 * We use one vtable trampoline per vtable slot index, so we need only the vtable,
729 * the other two can be computed from the vtable + the slot index.
733 * Obtain the vtable from the 'this' arg.
735 this = mono_arch_get_this_arg_from_call (regs, code);
741 /* Normal virtual call */
742 vtable_slot = &(vt->vtable [slot]);
744 /* Avoid loading metadata or creating a generic vtable if possible */
745 addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, slot);
746 if (addr && !vt->klass->valuetype) {
747 if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
750 return mono_create_ftnptr (mono_domain_get (), addr);
755 * is_generic_method_definition() above) also
756 * goes away if we do a
757 * mono_class_setup_vtable (vt->klass) here,
758 * because we then inflate the method
759 * correctly, put it in the cache, and the
760 * "wrong" inflation invocation still looks up
761 * the correctly inflated method.
763 * The hack above seems more stable and
766 m = mono_class_get_vtable_entry (vt->klass, slot);
768 need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (m, 0);
771 vtable_slot = &(((gpointer*)vt) [slot]);
774 need_rgctx_tramp = FALSE;
777 return common_call_trampoline (regs, code, m, tramp, vt, vtable_slot, need_rgctx_tramp);
780 #ifndef DISABLE_REMOTING
782 mono_generic_virtual_remoting_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8 *tramp)
784 MonoGenericContext context = { NULL, NULL };
785 MonoMethod *imt_method, *declaring;
790 g_assert (m->is_generic);
793 declaring = mono_method_get_declaring_generic_method (m);
797 if (m->klass->generic_class)
798 context.class_inst = m->klass->generic_class->context.class_inst;
800 g_assert (!m->klass->generic_container);
802 imt_method = mono_arch_find_imt_method (regs, code);
803 if (imt_method->is_inflated)
804 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
805 m = mono_class_inflate_generic_method (declaring, &context);
806 m = mono_marshal_get_remoting_invoke_with_check (m);
808 addr = mono_compile_method (m);
816 * mono_aot_trampoline:
818 * This trampoline handles calls made from AOT code. We try to bypass the
819 * normal JIT compilation logic to avoid loading the metadata for the method.
821 #ifdef MONO_ARCH_AOT_SUPPORTED
823 mono_aot_trampoline (mgreg_t *regs, guint8 *code, guint8 *token_info,
828 MonoMethod *method = NULL;
834 image = *(gpointer*)(gpointer)token_info;
835 token_info += sizeof (gpointer);
836 token = *(guint32*)(gpointer)token_info;
838 addr = mono_aot_get_method_from_token (mono_domain_get (), image, token);
840 method = mono_get_method (image, token, NULL);
843 /* Use the generic code */
844 return mono_magic_trampoline (regs, code, method, tramp);
847 addr = mono_create_ftnptr (mono_domain_get (), addr);
849 /* This is a normal call through a PLT entry */
850 plt_entry = mono_aot_get_plt_entry (code);
851 g_assert (plt_entry);
853 mono_aot_patch_plt_entry (code, plt_entry, NULL, regs, addr);
859 * mono_aot_plt_trampoline:
861 * This trampoline handles calls made from AOT code through the PLT table.
864 mono_aot_plt_trampoline (mgreg_t *regs, guint8 *code, guint8 *aot_module,
867 guint32 plt_info_offset = mono_aot_get_plt_info_offset (regs, code);
872 res = mono_aot_plt_resolve (aot_module, plt_info_offset, code);
874 if (mono_loader_get_last_error ())
875 mono_raise_exception (mono_loader_error_prepare_exception (mono_loader_get_last_error ()));
876 // FIXME: Error handling (how ?)
885 * mono_class_init_trampoline:
887 * This method calls mono_runtime_class_init () to run the static constructor
888 * for the type, then patches the caller code so it is not called again.
891 mono_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp)
893 guint8 *plt_entry = mono_aot_get_plt_entry (code);
897 mono_runtime_class_init (vtable);
899 if (vtable->initialized) {
901 mono_aot_patch_plt_entry (code, plt_entry, NULL, regs, mini_get_nullified_class_init_trampoline ());
903 mono_arch_nullify_class_init_trampoline (code, regs);
908 * mono_generic_class_init_trampoline:
910 * This method calls mono_runtime_class_init () to run the static constructor
914 mono_generic_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp)
918 mono_runtime_class_init (vtable);
922 mono_rgctx_lazy_fetch_trampoline (mgreg_t *regs, guint8 *code, gpointer data, guint8 *tramp)
924 #ifdef MONO_ARCH_VTABLE_REG
925 static gboolean inited = FALSE;
926 static int num_lookups = 0;
927 guint32 slot = GPOINTER_TO_UINT (data);
928 mgreg_t *r = (mgreg_t*)regs;
929 gpointer arg = (gpointer)(gssize)r [MONO_ARCH_VTABLE_REG];
930 guint32 index = MONO_RGCTX_SLOT_INDEX (slot);
931 gboolean mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
936 mono_counters_register ("RGCTX unmanaged lookups", MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_lookups);
943 return mono_method_fill_runtime_generic_context (arg, code, index);
945 return mono_class_fill_runtime_generic_context (arg, code, index);
947 g_assert_not_reached ();
952 mono_monitor_enter_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
954 mono_monitor_enter (obj);
958 mono_monitor_exit_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
960 mono_monitor_exit (obj);
963 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
966 * Precompute data to speed up mono_delegate_trampoline ().
967 * METHOD might be NULL.
969 static MonoDelegateTrampInfo*
970 create_delegate_trampoline_data (MonoDomain *domain, MonoClass *klass, MonoMethod *method)
972 MonoDelegateTrampInfo *tramp_data;
976 // Precompute the delegate invoke impl and pass it to the delegate trampoline
977 invoke = mono_get_delegate_invoke (klass);
980 tramp_data = mono_domain_alloc0 (domain, sizeof (MonoDelegateTrampInfo));
981 tramp_data->invoke = invoke;
982 tramp_data->invoke_sig = mono_method_signature (invoke);
983 tramp_data->impl_this = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), TRUE);
984 tramp_data->impl_nothis = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), FALSE);
985 tramp_data->method = method;
987 mono_error_init (&err);
988 tramp_data->sig = mono_method_signature_checked (method, &err);
989 tramp_data->need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (method, FALSE);
996 * mono_delegate_trampoline:
998 * This trampoline handles calls made to Delegate:Invoke ().
999 * This is called once the first time a delegate is invoked, so it must be fast.
1002 mono_delegate_trampoline (mgreg_t *regs, guint8 *code, gpointer *arg, guint8* tramp)
1004 MonoDomain *domain = mono_domain_get ();
1005 MonoDelegate *delegate;
1008 MonoMethod *method = NULL;
1009 gboolean multicast, callvirt = FALSE, closed_over_null = FALSE;
1010 gboolean need_rgctx_tramp = FALSE;
1011 gboolean need_unbox_tramp = FALSE;
1012 gboolean enable_caching = TRUE;
1013 MonoDelegateTrampInfo *tramp_info = (MonoDelegateTrampInfo*)arg;
1014 MonoMethod *invoke = tramp_info->invoke;
1015 guint8 *impl_this = tramp_info->impl_this;
1016 guint8 *impl_nothis = tramp_info->impl_nothis;
1018 MonoMethodSignature *sig;
1019 gpointer addr, compiled_method;
1020 gboolean is_remote = FALSE;
1022 trampoline_calls ++;
1024 /* Obtain the delegate object according to the calling convention */
1025 delegate = mono_arch_get_this_arg_from_call (regs, code);
1027 if (delegate->method) {
1028 method = delegate->method;
1031 * delegate->method_ptr == NULL means the delegate was initialized by
1032 * mini_delegate_ctor, while != NULL means it is initialized by
1033 * mono_delegate_ctor_with_method (). In both cases, we need to add wrappers
1034 * (ctor_with_method () does this, but it doesn't store the wrapper back into
1035 * delegate->method).
1037 #ifndef DISABLE_REMOTING
1038 if (delegate->target && delegate->target->vtable->klass == mono_defaults.transparent_proxy_class) {
1041 if (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class != mono_class_get_com_object_class () &&
1042 !mono_class_is_com_object (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class))
1044 method = mono_marshal_get_remoting_invoke (method);
1048 sig = tramp_info->sig;
1049 if (!(sig && method == tramp_info->method)) {
1050 mono_error_init (&err);
1051 sig = mono_method_signature_checked (method, &err);
1053 mono_error_raise_exception (&err);
1056 if (sig->hasthis && method->klass->valuetype) {
1058 need_unbox_tramp = TRUE;
1060 method = mono_marshal_get_unbox_wrapper (method);
1064 ji = mono_jit_info_table_find (domain, mono_get_addr_from_ftnptr (delegate->method_ptr));
1066 method = jinfo_get_method (ji);
1070 sig = tramp_info->sig;
1071 if (!(sig && method == tramp_info->method)) {
1072 mono_error_init (&err);
1073 sig = mono_method_signature_checked (method, &err);
1075 mono_error_raise_exception (&err);
1078 callvirt = !delegate->target && sig->hasthis;
1080 closed_over_null = tramp_info->invoke_sig->param_count == sig->param_count;
1082 if (callvirt && !closed_over_null) {
1084 * The delegate needs to make a virtual call to the target method using its
1085 * first argument as the receiver. This is hard to support in full-aot, so
1086 * optimize it in some cases if possible.
1087 * If the target method is not virtual or is in a sealed class,
1088 * the vcall will call it directly.
1089 * If the call doesn't return a valuetype, then the vcall uses the same calling
1090 * convention as a normal call.
1092 if (((method->klass->flags & TYPE_ATTRIBUTE_SEALED) || !(method->flags & METHOD_ATTRIBUTE_VIRTUAL)) && !MONO_TYPE_ISSTRUCT (sig->ret)) {
1094 enable_caching = FALSE;
1098 if (delegate->target &&
1099 method->flags & METHOD_ATTRIBUTE_VIRTUAL &&
1100 method->flags & METHOD_ATTRIBUTE_ABSTRACT &&
1101 method->klass->flags & TYPE_ATTRIBUTE_ABSTRACT) {
1102 method = mono_object_get_virtual_method (delegate->target, method);
1103 enable_caching = FALSE;
1106 if (method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
1107 method = mono_marshal_get_synchronized_wrapper (method);
1109 if (method == tramp_info->method)
1110 need_rgctx_tramp = tramp_info->need_rgctx_tramp;
1111 else if (mono_method_needs_static_rgctx_invoke (method, FALSE))
1112 need_rgctx_tramp = TRUE;
1116 * If the called address is a trampoline, replace it with the compiled method so
1117 * further calls don't have to go through the trampoline.
1119 if (method && !callvirt) {
1120 /* Avoid the overhead of looking up an already compiled method if possible */
1121 if (enable_caching && delegate->method_code && *delegate->method_code) {
1122 delegate->method_ptr = *delegate->method_code;
1124 compiled_method = addr = mono_compile_method (method);
1125 addr = mini_add_method_trampoline (NULL, method, compiled_method, need_rgctx_tramp, need_unbox_tramp);
1126 delegate->method_ptr = addr;
1127 if (enable_caching && delegate->method_code)
1128 *delegate->method_code = delegate->method_ptr;
1131 if (need_rgctx_tramp)
1132 delegate->method_ptr = mono_create_static_rgctx_trampoline (method, delegate->method_ptr);
1135 /* Necessary for !code condition to fallback to slow path */
1138 multicast = ((MonoMulticastDelegate*)delegate)->prev != NULL;
1139 if (!multicast && !callvirt) {
1140 if (method && (method->flags & METHOD_ATTRIBUTE_STATIC) && mono_method_signature (method)->param_count == mono_method_signature (invoke)->param_count + 1)
1141 /* Closed static delegate */
1144 code = delegate->target ? impl_this : impl_nothis;
1148 /* The general, unoptimized case */
1149 m = mono_marshal_get_delegate_invoke (invoke, delegate);
1150 code = mono_compile_method (m);
1151 code = mini_add_method_trampoline (NULL, m, code, mono_method_needs_static_rgctx_invoke (m, FALSE), FALSE);
1154 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
1155 if (enable_caching && !callvirt && tramp_info->method) {
1156 tramp_info->method_ptr = delegate->method_ptr;
1157 tramp_info->invoke_impl = delegate->invoke_impl;
1165 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1167 mono_handler_block_guard_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_info, guint8* tramp)
1171 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
1172 gpointer resume_ip = jit_tls->handler_block_return_address;
1174 memcpy (&ctx, &jit_tls->handler_block_context, sizeof (MonoContext));
1175 MONO_CONTEXT_SET_IP (&ctx, jit_tls->handler_block_return_address);
1177 jit_tls->handler_block_return_address = NULL;
1178 jit_tls->handler_block = NULL;
1180 if (!resume_ip) /*this should not happen, but we should avoid crashing */
1181 exc = mono_get_exception_execution_engine ("Invalid internal state, resuming abort after handler block but no resume ip found");
1183 exc = mono_thread_resume_interruption ();
1186 mono_handle_exception (&ctx, exc);
1187 mono_restore_context (&ctx);
1194 mono_create_handler_block_trampoline (void)
1196 static gpointer code;
1198 mono_memory_barrier ();
1202 g_assert (!mono_aot_only);
1204 mono_trampolines_lock ();
1207 MonoTrampInfo *info;
1210 tmp = mono_arch_create_handler_block_trampoline (&info, FALSE);
1211 mono_tramp_info_register (info);
1212 mono_memory_barrier ();
1215 mono_trampolines_unlock ();
1222 * mono_get_trampoline_func:
1224 * Return the C function which needs to be called by the generic trampoline of type
1228 mono_get_trampoline_func (MonoTrampolineType tramp_type)
1230 switch (tramp_type) {
1231 case MONO_TRAMPOLINE_JIT:
1232 case MONO_TRAMPOLINE_JUMP:
1233 return mono_magic_trampoline;
1234 case MONO_TRAMPOLINE_CLASS_INIT:
1235 return mono_class_init_trampoline;
1236 case MONO_TRAMPOLINE_GENERIC_CLASS_INIT:
1237 return mono_generic_class_init_trampoline;
1238 case MONO_TRAMPOLINE_RGCTX_LAZY_FETCH:
1239 return mono_rgctx_lazy_fetch_trampoline;
1240 #ifdef MONO_ARCH_AOT_SUPPORTED
1241 case MONO_TRAMPOLINE_AOT:
1242 return mono_aot_trampoline;
1243 case MONO_TRAMPOLINE_AOT_PLT:
1244 return mono_aot_plt_trampoline;
1246 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1247 case MONO_TRAMPOLINE_DELEGATE:
1248 return mono_delegate_trampoline;
1250 case MONO_TRAMPOLINE_RESTORE_STACK_PROT:
1251 return mono_altstack_restore_prot;
1252 #ifndef DISABLE_REMOTING
1253 case MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING:
1254 return mono_generic_virtual_remoting_trampoline;
1256 case MONO_TRAMPOLINE_MONITOR_ENTER:
1257 return mono_monitor_enter_trampoline;
1258 case MONO_TRAMPOLINE_MONITOR_EXIT:
1259 return mono_monitor_exit_trampoline;
1260 case MONO_TRAMPOLINE_VCALL:
1261 return mono_vcall_trampoline;
1262 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1263 case MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD:
1264 return mono_handler_block_guard_trampoline;
1267 g_assert_not_reached ();
1273 create_trampoline_code (MonoTrampolineType tramp_type)
1275 MonoTrampInfo *info;
1278 code = mono_arch_create_generic_trampoline (tramp_type, &info, FALSE);
1279 mono_tramp_info_register (info);
1285 mono_trampolines_init (void)
1287 mono_mutex_init_recursive (&trampolines_mutex);
1292 mono_trampoline_code [MONO_TRAMPOLINE_JIT] = create_trampoline_code (MONO_TRAMPOLINE_JIT);
1293 mono_trampoline_code [MONO_TRAMPOLINE_JUMP] = create_trampoline_code (MONO_TRAMPOLINE_JUMP);
1294 mono_trampoline_code [MONO_TRAMPOLINE_CLASS_INIT] = create_trampoline_code (MONO_TRAMPOLINE_CLASS_INIT);
1295 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_CLASS_INIT] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_CLASS_INIT);
1296 mono_trampoline_code [MONO_TRAMPOLINE_RGCTX_LAZY_FETCH] = create_trampoline_code (MONO_TRAMPOLINE_RGCTX_LAZY_FETCH);
1297 #ifdef MONO_ARCH_AOT_SUPPORTED
1298 mono_trampoline_code [MONO_TRAMPOLINE_AOT] = create_trampoline_code (MONO_TRAMPOLINE_AOT);
1299 mono_trampoline_code [MONO_TRAMPOLINE_AOT_PLT] = create_trampoline_code (MONO_TRAMPOLINE_AOT_PLT);
1301 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1302 mono_trampoline_code [MONO_TRAMPOLINE_DELEGATE] = create_trampoline_code (MONO_TRAMPOLINE_DELEGATE);
1304 mono_trampoline_code [MONO_TRAMPOLINE_RESTORE_STACK_PROT] = create_trampoline_code (MONO_TRAMPOLINE_RESTORE_STACK_PROT);
1305 #ifndef DISABLE_REMOTING
1306 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING);
1308 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_ENTER] = create_trampoline_code (MONO_TRAMPOLINE_MONITOR_ENTER);
1309 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_EXIT] = create_trampoline_code (MONO_TRAMPOLINE_MONITOR_EXIT);
1310 mono_trampoline_code [MONO_TRAMPOLINE_VCALL] = create_trampoline_code (MONO_TRAMPOLINE_VCALL);
1311 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1312 mono_trampoline_code [MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD] = create_trampoline_code (MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD);
1313 mono_create_handler_block_trampoline ();
1316 mono_counters_register ("Calls to trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &trampoline_calls);
1317 mono_counters_register ("JIT trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &jit_trampolines);
1318 mono_counters_register ("Unbox trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &unbox_trampolines);
1319 mono_counters_register ("Static rgctx trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &static_rgctx_trampolines);
1323 mono_trampolines_cleanup (void)
1325 if (class_init_hash_addr)
1326 g_hash_table_destroy (class_init_hash_addr);
1327 if (rgctx_lazy_fetch_trampoline_hash)
1328 g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash);
1329 if (rgctx_lazy_fetch_trampoline_hash_addr)
1330 g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash_addr);
1332 mono_mutex_destroy (&trampolines_mutex);
1336 mono_get_trampoline_code (MonoTrampolineType tramp_type)
1338 g_assert (mono_trampoline_code [tramp_type]);
1340 return mono_trampoline_code [tramp_type];
1344 mono_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
1347 return mono_aot_create_specific_trampoline (mono_defaults.corlib, arg1, tramp_type, domain, code_len);
1349 return mono_arch_create_specific_trampoline (arg1, tramp_type, domain, code_len);
1353 mono_create_class_init_trampoline (MonoVTable *vtable)
1356 MonoDomain *domain = vtable->domain;
1358 g_assert (!vtable->klass->generic_container);
1360 /* previously created trampoline code */
1361 mono_domain_lock (domain);
1363 g_hash_table_lookup (domain_jit_info (domain)->class_init_trampoline_hash,
1365 mono_domain_unlock (domain);
1369 code = mono_create_specific_trampoline (vtable, MONO_TRAMPOLINE_CLASS_INIT, domain, NULL);
1371 ptr = mono_create_ftnptr (domain, code);
1373 /* store trampoline address */
1374 mono_domain_lock (domain);
1375 g_hash_table_insert (domain_jit_info (domain)->class_init_trampoline_hash,
1377 mono_domain_unlock (domain);
1379 mono_trampolines_lock ();
1380 if (!class_init_hash_addr)
1381 class_init_hash_addr = g_hash_table_new (NULL, NULL);
1382 g_hash_table_insert (class_init_hash_addr, ptr, vtable);
1383 mono_trampolines_unlock ();
1389 mono_create_generic_class_init_trampoline (void)
1391 #ifdef MONO_ARCH_VTABLE_REG
1392 static gpointer code;
1393 MonoTrampInfo *info;
1395 mono_trampolines_lock ();
1399 /* get_named_code () might return an ftnptr, but our caller expects a direct pointer */
1400 code = mono_get_addr_from_ftnptr (mono_aot_get_trampoline ("generic_class_init_trampoline"));
1402 code = mono_arch_create_generic_class_init_trampoline (&info, FALSE);
1403 mono_tramp_info_register (info);
1407 mono_trampolines_unlock ();
1411 g_assert_not_reached ();
1416 mono_create_jump_trampoline (MonoDomain *domain, MonoMethod *method, gboolean add_sync_wrapper)
1420 guint32 code_size = 0;
1422 code = mono_jit_find_compiled_method_with_jit_info (domain, method, &ji);
1424 * We cannot recover the correct type of a shared generic
1425 * method from its native code address, so we use the
1426 * trampoline instead.
1427 * For synchronized methods, the trampoline adds the wrapper.
1429 if (code && !ji->has_generic_jit_info && !(method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED))
1432 mono_domain_lock (domain);
1433 code = g_hash_table_lookup (domain_jit_info (domain)->jump_trampoline_hash, method);
1434 mono_domain_unlock (domain);
1438 code = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JUMP, mono_domain_get (), &code_size);
1439 g_assert (code_size);
1441 ji = mono_domain_alloc0 (domain, MONO_SIZEOF_JIT_INFO);
1442 ji->code_start = code;
1443 ji->code_size = code_size;
1444 ji->d.method = method;
1447 * mono_delegate_ctor needs to find the method metadata from the
1448 * trampoline address, so we save it here.
1451 mono_jit_info_table_add (domain, ji);
1453 mono_domain_lock (domain);
1454 g_hash_table_insert (domain_jit_info (domain)->jump_trampoline_hash, method, ji->code_start);
1455 mono_domain_unlock (domain);
1457 return ji->code_start;
1461 mono_create_jit_trampoline_in_domain (MonoDomain *domain, MonoMethod *method)
1465 if (mono_aot_only) {
1466 /* Avoid creating trampolines if possible */
1467 gpointer code = mono_jit_find_compiled_method (domain, method);
1473 mono_domain_lock (domain);
1474 tramp = g_hash_table_lookup (domain_jit_info (domain)->jit_trampoline_hash, method);
1475 mono_domain_unlock (domain);
1479 tramp = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JIT, domain, NULL);
1481 mono_domain_lock (domain);
1482 g_hash_table_insert (domain_jit_info (domain)->jit_trampoline_hash, method, tramp);
1483 mono_domain_unlock (domain);
1491 mono_create_jit_trampoline (MonoMethod *method)
1493 return mono_create_jit_trampoline_in_domain (mono_domain_get (), method);
1497 mono_create_jit_trampoline_from_token (MonoImage *image, guint32 token)
1501 MonoDomain *domain = mono_domain_get ();
1502 guint8 *buf, *start;
1504 buf = start = mono_domain_alloc0 (domain, 2 * sizeof (gpointer));
1506 *(gpointer*)(gpointer)buf = image;
1507 buf += sizeof (gpointer);
1508 *(guint32*)(gpointer)buf = token;
1510 tramp = mono_create_specific_trampoline (start, MONO_TRAMPOLINE_AOT, domain, NULL);
1519 * mono_create_delegate_trampoline_info:
1521 * Create a delegate trampoline for the KLASS+METHOD pair.
1523 MonoDelegateTrampInfo*
1524 mono_create_delegate_trampoline_info (MonoDomain *domain, MonoClass *klass, MonoMethod *method)
1526 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1527 MonoDelegateTrampInfo *tramp_info;
1528 MonoClassMethodPair pair, *dpair;
1529 guint32 code_size = 0;
1532 pair.method = method;
1533 mono_domain_lock (domain);
1534 tramp_info = g_hash_table_lookup (domain_jit_info (domain)->delegate_trampoline_hash, &pair);
1535 mono_domain_unlock (domain);
1539 tramp_info = create_delegate_trampoline_data (domain, klass, method);
1541 tramp_info->invoke_impl = mono_create_specific_trampoline (tramp_info, MONO_TRAMPOLINE_DELEGATE, domain, &code_size);
1542 g_assert (code_size);
1544 dpair = mono_domain_alloc0 (domain, sizeof (MonoClassMethodPair));
1545 memcpy (dpair, &pair, sizeof (MonoClassMethodPair));
1547 /* store trampoline address */
1548 mono_domain_lock (domain);
1549 g_hash_table_insert (domain_jit_info (domain)->delegate_trampoline_hash, dpair, tramp_info);
1550 mono_domain_unlock (domain);
1559 mono_create_delegate_trampoline (MonoDomain *domain, MonoClass *klass)
1561 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1562 return mono_create_delegate_trampoline_info (domain, klass, NULL)->invoke_impl;
1569 mono_create_delegate_virtual_trampoline (MonoDomain *domain, MonoClass *klass, MonoMethod *method)
1571 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1572 MonoMethod *invoke = mono_get_delegate_invoke (klass);
1575 return mono_get_delegate_virtual_invoke_impl (mono_method_signature (invoke), method);
1582 mono_create_rgctx_lazy_fetch_trampoline (guint32 offset)
1584 static gboolean inited = FALSE;
1585 static int num_trampolines = 0;
1586 MonoTrampInfo *info;
1588 gpointer tramp, ptr;
1590 mono_trampolines_lock ();
1591 if (rgctx_lazy_fetch_trampoline_hash)
1592 tramp = g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset));
1595 mono_trampolines_unlock ();
1599 if (mono_aot_only) {
1600 ptr = mono_aot_get_lazy_fetch_trampoline (offset);
1602 tramp = mono_arch_create_rgctx_lazy_fetch_trampoline (offset, &info, FALSE);
1603 mono_tramp_info_register (info);
1604 ptr = mono_create_ftnptr (mono_get_root_domain (), tramp);
1607 mono_trampolines_lock ();
1608 if (!rgctx_lazy_fetch_trampoline_hash) {
1609 rgctx_lazy_fetch_trampoline_hash = g_hash_table_new (NULL, NULL);
1610 rgctx_lazy_fetch_trampoline_hash_addr = g_hash_table_new (NULL, NULL);
1612 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset), ptr);
1613 g_assert (offset != -1);
1614 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash_addr, ptr, GUINT_TO_POINTER (offset + 1));
1615 mono_trampolines_unlock ();
1618 mono_counters_register ("RGCTX num lazy fetch trampolines",
1619 MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_trampolines);
1628 mono_create_monitor_enter_trampoline (void)
1630 static gpointer code;
1632 if (mono_aot_only) {
1634 code = mono_aot_get_trampoline ("monitor_enter_trampoline");
1638 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
1639 mono_trampolines_lock ();
1642 MonoTrampInfo *info;
1644 code = mono_arch_create_monitor_enter_trampoline (&info, FALSE);
1645 mono_tramp_info_register (info);
1648 mono_trampolines_unlock ();
1651 g_assert_not_reached ();
1658 mono_create_monitor_exit_trampoline (void)
1660 static gpointer code;
1662 if (mono_aot_only) {
1664 code = mono_aot_get_trampoline ("monitor_exit_trampoline");
1668 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
1669 mono_trampolines_lock ();
1672 MonoTrampInfo *info;
1674 code = mono_arch_create_monitor_exit_trampoline (&info, FALSE);
1675 mono_tramp_info_register (info);
1678 mono_trampolines_unlock ();
1681 g_assert_not_reached ();
1686 #ifdef MONO_ARCH_LLVM_SUPPORTED
1688 * mono_create_llvm_imt_trampoline:
1690 * LLVM compiled code can't pass in the IMT argument, so we use this trampoline, which
1691 * sets the IMT argument, then branches to the contents of the vtable slot given by
1692 * vt_offset in the vtable which is obtained from the argument list.
1695 mono_create_llvm_imt_trampoline (MonoDomain *domain, MonoMethod *m, int vt_offset)
1697 #ifdef MONO_ARCH_HAVE_LLVM_IMT_TRAMPOLINE
1698 return mono_arch_get_llvm_imt_trampoline (domain, m, vt_offset);
1700 g_assert_not_reached ();
1707 mono_find_class_init_trampoline_by_addr (gconstpointer addr)
1711 mono_trampolines_lock ();
1712 if (class_init_hash_addr)
1713 res = g_hash_table_lookup (class_init_hash_addr, addr);
1716 mono_trampolines_unlock ();
1721 mono_find_rgctx_lazy_fetch_trampoline_by_addr (gconstpointer addr)
1725 mono_trampolines_lock ();
1726 if (rgctx_lazy_fetch_trampoline_hash_addr) {
1727 /* We store the real offset + 1 so we can detect when the lookup fails */
1728 offset = GPOINTER_TO_INT (g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash_addr, addr));
1736 mono_trampolines_unlock ();
1740 static const char*tramp_names [MONO_TRAMPOLINE_NUM] = {
1744 "generic_class_init",
1749 "restore_stack_prot",
1750 "generic_virtual_remoting",
1754 "handler_block_guard"
1758 * mono_get_generic_trampoline_simple_name:
1762 mono_get_generic_trampoline_simple_name (MonoTrampolineType tramp_type)
1764 return tramp_names [tramp_type];
1768 * mono_get_generic_trampoline_name:
1770 * Returns a pointer to malloc-ed memory.
1773 mono_get_generic_trampoline_name (MonoTrampolineType tramp_type)
1775 return g_strdup_printf ("generic_trampoline_%s", tramp_names [tramp_type]);
1779 * mono_get_rgctx_fetch_trampoline_name:
1781 * Returns a pointer to malloc-ed memory.
1784 mono_get_rgctx_fetch_trampoline_name (int slot)
1789 mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
1790 index = MONO_RGCTX_SLOT_INDEX (slot);
1792 return g_strdup_printf ("rgctx_fetch_trampoline_%s_%d", mrgctx ? "mrgctx" : "rgctx", index);
1796 mini_get_nullified_class_init_trampoline (void)
1798 static gpointer nullified_class_init_trampoline;
1800 if (!nullified_class_init_trampoline) {
1802 MonoTrampInfo *info;
1804 if (mono_aot_only) {
1805 tramp = mono_aot_get_trampoline ("nullified_class_init_trampoline");
1807 tramp = mono_arch_get_nullified_class_init_trampoline (&info);
1808 mono_tramp_info_register (info);
1810 mono_memory_barrier ();
1811 nullified_class_init_trampoline = tramp;
1814 return nullified_class_init_trampoline;