2 * (C) 2003 Ximian, Inc.
3 * (C) 2003-2011 Novell, Inc.
4 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
9 #include <mono/metadata/appdomain.h>
10 #include <mono/metadata/metadata-internals.h>
11 #include <mono/metadata/marshal.h>
12 #include <mono/metadata/tabledefs.h>
13 #include <mono/utils/mono-counters.h>
14 #include <mono/utils/mono-error-internals.h>
15 #include <mono/utils/mono-membar.h>
16 #include <mono/utils/mono-compiler.h>
21 * Address of the trampoline code. This is used by the debugger to check
22 * whether a method is a trampoline.
24 guint8* mono_trampoline_code [MONO_TRAMPOLINE_NUM];
26 static GHashTable *rgctx_lazy_fetch_trampoline_hash;
27 static GHashTable *rgctx_lazy_fetch_trampoline_hash_addr;
28 static guint32 trampoline_calls, jit_trampolines, unbox_trampolines, static_rgctx_trampolines;
30 #define mono_trampolines_lock() mono_os_mutex_lock (&trampolines_mutex)
31 #define mono_trampolines_unlock() mono_os_mutex_unlock (&trampolines_mutex)
32 static mono_mutex_t trampolines_mutex;
34 #ifdef MONO_ARCH_GSHARED_SUPPORTED
42 rgctx_tramp_info_equal (gconstpointer ka, gconstpointer kb)
44 const RgctxTrampInfo *i1 = (const RgctxTrampInfo *)ka;
45 const RgctxTrampInfo *i2 = (const RgctxTrampInfo *)kb;
47 if (i1->m == i2->m && i1->addr == i2->addr)
54 rgctx_tramp_info_hash (gconstpointer data)
56 const RgctxTrampInfo *info = (const RgctxTrampInfo *)data;
58 return GPOINTER_TO_UINT (info->m) ^ GPOINTER_TO_UINT (info->addr);
62 * mono_create_static_rgctx_trampoline:
63 * @m: the mono method to create a trampoline for
64 * @addr: the address to jump to (where the compiled code for M lives)
66 * Creates a static rgctx trampoline for M which branches to ADDR which should
67 * point to the compiled code of M.
69 * Static rgctx trampolines are used when a shared generic method which doesn't
70 * have a this argument is called indirectly, ie. from code which can't pass in
71 * the rgctx argument. The trampoline sets the rgctx argument and jumps to the
72 * methods code. These trampolines are similar to the unbox trampolines, they
73 * perform the same task as the static rgctx wrappers, but they are smaller/faster,
74 * and can be made to work with full AOT.
76 * On PPC addr should be an ftnptr and the return value is an ftnptr too.
78 * Returns the generated static rgctx trampoline.
81 mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr)
86 RgctxTrampInfo tmp_info;
89 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
90 g_assert (((gpointer*)addr) [2] == 0);
93 ctx = mini_method_get_rgctx (m);
95 domain = mono_domain_get ();
98 * In the AOT case, addr might point to either the method, or to an unbox trampoline,
99 * so make the hash keyed on the m+addr pair.
101 mono_domain_lock (domain);
102 if (!domain_jit_info (domain)->static_rgctx_trampoline_hash)
103 domain_jit_info (domain)->static_rgctx_trampoline_hash = g_hash_table_new (rgctx_tramp_info_hash, rgctx_tramp_info_equal);
105 tmp_info.addr = addr;
106 res = g_hash_table_lookup (domain_jit_info (domain)->static_rgctx_trampoline_hash,
108 mono_domain_unlock (domain);
113 res = mono_aot_get_static_rgctx_trampoline (ctx, addr);
115 res = mono_arch_get_static_rgctx_trampoline (m, (MonoMethodRuntimeGenericContext *)ctx, addr);
117 mono_domain_lock (domain);
118 /* Duplicates inserted while we didn't hold the lock are OK */
119 info = (RgctxTrampInfo *)mono_domain_alloc (domain, sizeof (RgctxTrampInfo));
122 g_hash_table_insert (domain_jit_info (domain)->static_rgctx_trampoline_hash, info, res);
123 mono_domain_unlock (domain);
125 static_rgctx_trampolines ++;
131 mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr)
134 * This shouldn't happen as all arches which support generic sharing support
135 * static rgctx trampolines as well.
137 g_assert_not_reached ();
142 #define DEBUG_IMT(stmt) do { stmt; } while (0)
144 #define DEBUG_IMT(stmt) do { } while (0)
148 * mini_resolve_imt_method:
150 * Resolve the actual method called when making an IMT call through VTABLE_SLOT with IMT_METHOD as the interface method.
152 * Either IMPL_METHOD or OUT_AOT_ADDR will be set on return.
155 mini_resolve_imt_method (MonoVTable *vt, gpointer *vtable_slot, MonoMethod *imt_method, MonoMethod **impl_method, gpointer *out_aot_addr, gboolean *out_need_rgctx_tramp, MonoMethod **variant_iface)
157 MonoMethod *impl = NULL, *generic_virtual = NULL;
158 gboolean lookup_aot, variance_used = FALSE, need_rgctx_tramp = FALSE;
160 guint8 *aot_addr = NULL;
161 int displacement = vtable_slot - ((gpointer*)vt);
162 int interface_offset;
163 int imt_slot = MONO_IMT_SIZE + displacement;
165 g_assert (imt_slot < MONO_IMT_SIZE);
167 /* This has to be variance aware since imt_method can be from an interface that vt->klass doesn't directly implement */
168 interface_offset = mono_class_interface_offset_with_variance (vt->klass, imt_method->klass, &variance_used);
169 if (interface_offset < 0)
170 g_error ("%s doesn't implement interface %s\n", mono_type_get_name_full (&vt->klass->byval_arg, MONO_TYPE_NAME_FORMAT_IL), mono_type_get_name_full (&imt_method->klass->byval_arg, MONO_TYPE_NAME_FORMAT_IL));
172 *variant_iface = NULL;
173 if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) {
174 /* Generic virtual method */
175 generic_virtual = imt_method;
176 need_rgctx_tramp = TRUE;
177 } else if (variance_used && mono_class_has_variant_generic_params (imt_method->klass)) {
178 *variant_iface = imt_method;
182 /* We can only use the AOT compiled code if we don't require further processing */
183 lookup_aot = !generic_virtual & !variant_iface;
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 = (guint8 *)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 (), (char *)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);
344 if (ji && !ji->is_trampoline)
345 jmethod = jinfo_get_method (ji);
346 if (callee_gsharedvt && mini_is_gsharedvt_variable_signature (mono_method_signature (jmethod))) {
347 MonoMethodSignature *sig, *gsig;
349 /* Here m is a generic instance, while ji->method is the gsharedvt method implementing it */
351 /* Call from normal/gshared code to gsharedvt code with variable signature */
352 sig = mono_method_signature (m);
353 gsig = mono_method_signature (jmethod);
355 addr = mini_get_gsharedvt_wrapper (TRUE, addr, sig, gsig, -1, FALSE);
358 g_assert_not_reached ();
359 //printf ("IN: %s\n", mono_method_full_name (m, TRUE));
362 if (callee_array_helper) {
363 add_static_rgctx_tramp = FALSE;
364 /* FIXME: ji->from_aot is not set for llvm methods */
365 if (ji && (ji->from_aot || mono_aot_only)) {
366 /* In AOT mode, compiled_method points to one of the InternalArray methods in Array. */
367 if (!mono_llvm_only && mono_method_needs_static_rgctx_invoke (jinfo_get_method (ji), TRUE))
368 add_static_rgctx_tramp = TRUE;
373 add_static_rgctx_tramp = FALSE;
375 if (add_static_rgctx_tramp)
376 addr = mono_create_static_rgctx_trampoline (m, addr);
382 * mini_create_llvmonly_ftndesc:
384 * Create a function descriptor of the form <addr, arg>, which
385 * represents a callee ADDR with ARG as the last argument.
387 * - generic sharing (ARG is the rgctx)
388 * - gsharedvt signature wrappers (ARG is a function descriptor)
391 mini_create_llvmonly_ftndesc (MonoDomain *domain, gpointer addr, gpointer arg)
393 MonoFtnDesc *ftndesc = (MonoFtnDesc*)mono_domain_alloc0 (mono_domain_get (), 2 * sizeof (gpointer));
394 ftndesc->addr = addr;
401 * mini_add_method_wrappers_llvmonly:
403 * Add unbox/gsharedvt wrappers around COMPILED_METHOD if needed. Return the wrapper address or COMPILED_METHOD
404 * if no wrapper is needed. Set OUT_ARG to the rgctx/extra argument needed to be passed to the returned method.
407 mini_add_method_wrappers_llvmonly (MonoMethod *m, gpointer compiled_method, gboolean caller_gsharedvt, gboolean add_unbox_tramp, gpointer *out_arg)
409 gpointer addr = compiled_method;
410 gboolean callee_gsharedvt, callee_array_helper;
411 MonoMethod *jmethod = NULL;
414 // FIXME: This loads information from AOT (perf problem)
415 ji = mini_jit_info_table_find (mono_domain_get (), (char *)mono_get_addr_from_ftnptr (compiled_method), NULL);
416 callee_gsharedvt = mini_jit_info_is_gsharedvt (ji);
418 callee_array_helper = FALSE;
419 if (m->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED) {
420 WrapperInfo *info = mono_marshal_get_wrapper_info (m);
423 * generic array helpers.
424 * Have to replace the wrappers with the original generic instances.
426 if (info && info->subtype == WRAPPER_SUBTYPE_GENERIC_ARRAY_HELPER) {
427 callee_array_helper = TRUE;
428 m = info->d.generic_array_helper.method;
430 } else if (m->wrapper_type == MONO_WRAPPER_UNKNOWN) {
431 WrapperInfo *info = mono_marshal_get_wrapper_info (m);
433 /* Same for synchronized inner wrappers */
434 if (info && info->subtype == WRAPPER_SUBTYPE_SYNCHRONIZED_INNER) {
435 m = info->d.synchronized_inner.method;
439 if (callee_gsharedvt)
440 g_assert (m->is_inflated);
442 addr = compiled_method;
444 if (add_unbox_tramp) {
446 * The unbox trampolines call the method directly, so need to add
447 * an rgctx tramp before them.
450 addr = mono_aot_get_unbox_trampoline (m);
452 unbox_trampolines ++;
453 addr = mono_arch_get_unbox_trampoline (m, addr);
457 g_assert (mono_llvm_only);
460 if (ji && !ji->is_trampoline)
461 jmethod = jinfo_get_method (ji);
463 if (callee_gsharedvt)
464 callee_gsharedvt = mini_is_gsharedvt_variable_signature (mono_method_signature (jmethod));
466 if (!caller_gsharedvt && callee_gsharedvt) {
467 MonoMethodSignature *sig, *gsig;
469 /* Here m is a generic instance, while ji->method is the gsharedvt method implementing it */
471 /* Call from normal/gshared code to gsharedvt code with variable signature */
472 sig = mono_method_signature (m);
473 gsig = mono_method_signature (jmethod);
475 addr = mini_get_gsharedvt_wrapper (TRUE, addr, sig, gsig, -1, FALSE);
478 * This is a gsharedvt in wrapper, it gets passed a ftndesc for the gsharedvt method as an argument.
480 *out_arg = mini_create_llvmonly_ftndesc (mono_domain_get (), compiled_method, mini_method_get_rgctx (m));
481 //printf ("IN: %s\n", mono_method_full_name (m, TRUE));
484 if (!(*out_arg) && mono_method_needs_static_rgctx_invoke (m, FALSE))
485 *out_arg = mini_method_get_rgctx (m);
487 if (caller_gsharedvt && !callee_gsharedvt) {
489 * The callee uses the gsharedvt calling convention, have to add an out wrapper.
491 gpointer out_wrapper = mini_get_gsharedvt_wrapper (FALSE, NULL, mono_method_signature (m), NULL, -1, FALSE);
492 MonoFtnDesc *out_wrapper_arg = mini_create_llvmonly_ftndesc (mono_domain_get (), addr, *out_arg);
495 *out_arg = out_wrapper_arg;
502 * common_call_trampoline:
504 * The code to handle normal, virtual, and interface method calls and jumps, both
505 * from JITted and LLVM compiled code.
508 common_call_trampoline_inner (mgreg_t *regs, guint8 *code, MonoMethod *m, MonoVTable *vt, gpointer *vtable_slot)
510 gpointer addr, compiled_method;
511 gboolean generic_shared = FALSE;
512 gboolean need_unbox_tramp = FALSE;
513 gboolean need_rgctx_tramp = FALSE;
514 MonoMethod *declaring = NULL;
515 MonoMethod *generic_virtual = NULL, *variant_iface = NULL;
517 gboolean imt_call, virtual_;
518 gpointer *orig_vtable_slot, *vtable_slot_to_patch = NULL;
519 MonoJitInfo *ji = NULL;
521 virtual_ = vt && (gpointer)vtable_slot > (gpointer)vt;
522 imt_call = vt && (gpointer)vtable_slot < (gpointer)vt;
525 * rgctx trampolines are needed when the call is indirect so the caller can't pass
526 * the rgctx argument needed by the callee.
529 need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (m, FALSE);
531 orig_vtable_slot = vtable_slot;
532 vtable_slot_to_patch = vtable_slot;
536 MonoMethod *imt_method = NULL, *impl_method = NULL;
537 MonoObject *this_arg;
539 g_assert (vtable_slot);
541 imt_method = mono_arch_find_imt_method (regs, code);
542 this_arg = (MonoObject *)mono_arch_get_this_arg_from_call (regs, code);
544 if (mono_object_is_transparent_proxy (this_arg)) {
545 /* Use the slow path for now */
546 m = mono_object_get_virtual_method (this_arg, imt_method);
547 vtable_slot_to_patch = NULL;
549 if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) {
550 /* Generic virtual method */
551 generic_virtual = imt_method;
552 need_rgctx_tramp = TRUE;
555 vtable_slot = mini_resolve_imt_method (vt, vtable_slot, imt_method, &impl_method, &addr, &need_rgctx_tramp, &variant_iface);
556 /* This is the vcall slot which gets called through the IMT thunk */
557 vtable_slot_to_patch = vtable_slot;
561 * We found AOT compiled code for the method, skip the rest.
563 if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
566 return mono_create_ftnptr (mono_domain_get (), addr);
574 * The virtual check is needed because is_generic_method_definition (m) could
575 * return TRUE for methods used in IMT calls too.
577 if (virtual_ && is_generic_method_definition (m)) {
579 MonoGenericContext context = { NULL, NULL };
580 MonoMethod *declaring;
583 declaring = mono_method_get_declaring_generic_method (m);
587 if (m->klass->generic_class)
588 context.class_inst = m->klass->generic_class->context.class_inst;
590 g_assert (!m->klass->generic_container);
592 generic_virtual = mono_arch_find_imt_method (regs, code);
593 g_assert (generic_virtual);
594 g_assert (generic_virtual->is_inflated);
595 context.method_inst = ((MonoMethodInflated*)generic_virtual)->context.method_inst;
597 m = mono_class_inflate_generic_method_checked (declaring, &context, &error);
598 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */
599 /* FIXME: only do this if the method is sharable */
600 need_rgctx_tramp = TRUE;
601 } else if ((context_used = mono_method_check_context_used (m))) {
602 MonoClass *klass = NULL;
603 MonoMethod *actual_method = NULL;
604 MonoVTable *vt = NULL;
605 MonoGenericInst *method_inst = NULL;
608 generic_shared = TRUE;
613 * The caller is gshared code, compute the actual method to call from M and this/rgctx.
615 if (m->is_inflated && mono_method_get_context (m)->method_inst) {
616 MonoMethodRuntimeGenericContext *mrgctx = (MonoMethodRuntimeGenericContext*)mono_arch_find_static_call_vtable (regs, code);
618 klass = mrgctx->class_vtable->klass;
619 method_inst = mrgctx->method_inst;
620 } else if ((m->flags & METHOD_ATTRIBUTE_STATIC) || m->klass->valuetype) {
621 MonoVTable *vtable = mono_arch_find_static_call_vtable (regs, code);
623 klass = vtable->klass;
625 MonoObject *this_argument = (MonoObject *)mono_arch_get_this_arg_from_call (regs, code);
627 vt = this_argument->vtable;
628 vtable_slot = orig_vtable_slot;
630 g_assert (this_argument->vtable->klass->inited);
633 mono_class_setup_supertypes (this_argument->vtable->klass);
634 klass = this_argument->vtable->klass->supertypes [m->klass->idepth - 1];
638 g_assert (vtable_slot || klass);
641 int displacement = vtable_slot - ((gpointer*)vt);
643 g_assert_not_reached ();
645 g_assert (displacement > 0);
647 actual_method = vt->klass->vtable [displacement];
650 if (method_inst || m->wrapper_type) {
652 MonoGenericContext context = { NULL, NULL };
655 declaring = mono_method_get_declaring_generic_method (m);
659 if (klass->generic_class)
660 context.class_inst = klass->generic_class->context.class_inst;
661 else if (klass->generic_container)
662 context.class_inst = klass->generic_container->context.class_inst;
663 context.method_inst = method_inst;
665 actual_method = mono_class_inflate_generic_method_checked (declaring, &context, &error);
666 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */
668 actual_method = mono_class_get_method_generic (klass, m);
672 g_assert (actual_method);
673 g_assert (actual_method->klass == klass);
675 if (actual_method->is_inflated)
676 declaring = mono_method_get_declaring_generic_method (actual_method);
683 if (m->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) {
684 m = mono_marshal_get_synchronized_wrapper (m);
685 need_rgctx_tramp = FALSE;
688 /* Calls made through delegates on platforms without delegate trampolines */
689 if (!code && mono_method_needs_static_rgctx_invoke (m, FALSE))
690 need_rgctx_tramp = TRUE;
692 addr = compiled_method = mono_compile_method (m);
695 if (generic_virtual || variant_iface) {
696 if (vt->klass->valuetype) /*FIXME is this required variant iface?*/
697 need_unbox_tramp = TRUE;
698 } else if (orig_vtable_slot) {
699 if (m->klass->valuetype)
700 need_unbox_tramp = TRUE;
703 addr = mini_add_method_trampoline (m, compiled_method, need_rgctx_tramp, need_unbox_tramp);
705 if (generic_virtual || variant_iface) {
706 MonoMethod *target = generic_virtual ? generic_virtual : variant_iface;
708 vtable_slot = orig_vtable_slot;
709 g_assert (vtable_slot);
711 mono_method_add_generic_virtual_invocation (mono_domain_get (),
718 /* the method was jumped to */
720 MonoDomain *domain = mono_domain_get ();
722 /* Patch the got entries pointing to this method */
724 * We do this here instead of in mono_codegen () to cover the case when m
725 * was loaded from an aot image.
727 if (domain_jit_info (domain)->jump_target_got_slot_hash) {
730 mono_domain_lock (domain);
731 list = (GSList *)g_hash_table_lookup (domain_jit_info (domain)->jump_target_got_slot_hash, m);
733 for (tmp = list; tmp; tmp = tmp->next) {
734 gpointer *got_slot = (gpointer *)tmp->data;
737 g_hash_table_remove (domain_jit_info (domain)->jump_target_got_slot_hash, m);
740 mono_domain_unlock (domain);
746 vtable_slot = orig_vtable_slot;
749 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))) {
750 g_assert (*vtable_slot_to_patch);
751 *vtable_slot_to_patch = mono_get_addr_from_ftnptr (addr);
754 guint8 *plt_entry = mono_aot_get_plt_entry (code);
755 gboolean no_patch = FALSE;
756 MonoJitInfo *target_ji;
759 if (generic_shared) {
761 mini_jit_info_table_find (mono_domain_get (), (char *)mono_get_addr_from_ftnptr (compiled_method), NULL);
763 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
765 if (ji && target_ji && generic_shared && ji->has_generic_jit_info && !target_ji->has_generic_jit_info) {
770 mono_aot_patch_plt_entry (code, plt_entry, NULL, regs, (guint8 *)addr);
772 if (generic_shared) {
773 if (m->wrapper_type != MONO_WRAPPER_NONE)
774 m = mono_marshal_method_from_wrapper (m);
775 //g_assert (mono_method_is_generic_sharable (m, FALSE));
778 /* Patch calling code */
780 mini_jit_info_table_find (mono_domain_get (), (char *)mono_get_addr_from_ftnptr (compiled_method), NULL);
782 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
784 if (ji && target_ji && generic_shared && ji->has_generic_jit_info && !target_ji->has_generic_jit_info) {
786 * Can't patch the call as the caller is gshared, but the callee is not. Happens when
787 * generic sharing fails.
788 * FIXME: Performance problem.
793 if (!no_patch && mono_method_same_domain (ji, target_ji))
794 mono_arch_patch_callsite ((guint8 *)ji->code_start, code, (guint8 *)addr);
802 common_call_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, MonoVTable *vt, gpointer *vtable_slot)
805 MONO_PREPARE_RESET_BLOCKING;
806 res = common_call_trampoline_inner (regs, code, m, vt, vtable_slot);
807 MONO_FINISH_RESET_BLOCKING;
812 * mono_magic_trampoline:
814 * This trampoline handles normal calls from JITted code.
817 mono_magic_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp)
821 return common_call_trampoline (regs, code, (MonoMethod *)arg, NULL, NULL);
825 * mono_vcall_trampoline:
827 * This trampoline handles virtual calls.
830 mono_vcall_trampoline (mgreg_t *regs, guint8 *code, int slot, guint8 *tramp)
832 MonoObject *this_arg;
834 gpointer *vtable_slot;
841 * We need to obtain the following pieces of information:
842 * - the method which needs to be compiled.
844 * We use one vtable trampoline per vtable slot index, so we need only the vtable,
845 * the other two can be computed from the vtable + the slot index.
849 * Obtain the vtable from the 'this' arg.
851 this_arg = (MonoObject *)mono_arch_get_this_arg_from_call (regs, code);
854 vt = this_arg->vtable;
857 /* Normal virtual call */
858 vtable_slot = &(vt->vtable [slot]);
860 /* Avoid loading metadata or creating a generic vtable if possible */
861 addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, slot);
862 if (addr && !vt->klass->valuetype) {
863 if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
866 return mono_create_ftnptr (mono_domain_get (), addr);
871 * is_generic_method_definition() above) also
872 * goes away if we do a
873 * mono_class_setup_vtable (vt->klass) here,
874 * because we then inflate the method
875 * correctly, put it in the cache, and the
876 * "wrong" inflation invocation still looks up
877 * the correctly inflated method.
879 * The hack above seems more stable and
882 m = mono_class_get_vtable_entry (vt->klass, slot);
885 vtable_slot = &(((gpointer*)vt) [slot]);
890 return common_call_trampoline (regs, code, m, vt, vtable_slot);
893 #ifndef DISABLE_REMOTING
895 mono_generic_virtual_remoting_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8 *tramp)
898 MonoGenericContext context = { NULL, NULL };
899 MonoMethod *imt_method, *declaring;
904 g_assert (m->is_generic);
907 declaring = mono_method_get_declaring_generic_method (m);
911 if (m->klass->generic_class)
912 context.class_inst = m->klass->generic_class->context.class_inst;
914 g_assert (!m->klass->generic_container);
916 imt_method = mono_arch_find_imt_method (regs, code);
917 if (imt_method->is_inflated)
918 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
919 m = mono_class_inflate_generic_method_checked (declaring, &context, &error);
920 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */;
921 m = mono_marshal_get_remoting_invoke_with_check (m);
923 addr = mono_compile_method (m);
931 * mono_aot_trampoline:
933 * This trampoline handles calls made from AOT code. We try to bypass the
934 * normal JIT compilation logic to avoid loading the metadata for the method.
936 #ifdef MONO_ARCH_AOT_SUPPORTED
938 mono_aot_trampoline (mgreg_t *regs, guint8 *code, guint8 *token_info,
943 MonoMethod *method = NULL;
949 image = (MonoImage *)*(gpointer*)(gpointer)token_info;
950 token_info += sizeof (gpointer);
951 token = *(guint32*)(gpointer)token_info;
953 addr = mono_aot_get_method_from_token (mono_domain_get (), image, token);
955 method = mono_get_method (image, token, NULL);
958 /* Use the generic code */
959 return mono_magic_trampoline (regs, code, method, tramp);
962 addr = mono_create_ftnptr (mono_domain_get (), addr);
964 /* This is a normal call through a PLT entry */
965 plt_entry = mono_aot_get_plt_entry (code);
966 g_assert (plt_entry);
968 mono_aot_patch_plt_entry (code, plt_entry, NULL, regs, (guint8 *)addr);
974 * mono_aot_plt_trampoline:
976 * This trampoline handles calls made from AOT code through the PLT table.
979 mono_aot_plt_trampoline (mgreg_t *regs, guint8 *code, guint8 *aot_module,
982 guint32 plt_info_offset = mono_aot_get_plt_info_offset (regs, code);
987 res = mono_aot_plt_resolve (aot_module, plt_info_offset, code);
989 if (mono_loader_get_last_error ())
990 mono_raise_exception (mono_loader_error_prepare_exception (mono_loader_get_last_error ()));
991 // FIXME: Error handling (how ?)
1000 mono_rgctx_lazy_fetch_trampoline (mgreg_t *regs, guint8 *code, gpointer data, guint8 *tramp)
1002 static gboolean inited = FALSE;
1003 static int num_lookups = 0;
1004 guint32 slot = GPOINTER_TO_UINT (data);
1005 mgreg_t *r = (mgreg_t*)regs;
1006 gpointer arg = (gpointer)(gssize)r [MONO_ARCH_VTABLE_REG];
1007 guint32 index = MONO_RGCTX_SLOT_INDEX (slot);
1008 gboolean mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
1010 trampoline_calls ++;
1013 mono_counters_register ("RGCTX unmanaged lookups", MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_lookups);
1020 return mono_method_fill_runtime_generic_context ((MonoMethodRuntimeGenericContext *)arg, index);
1022 return mono_class_fill_runtime_generic_context ((MonoVTable *)arg, index);
1026 * Precompute data to speed up mono_delegate_trampoline ().
1027 * METHOD might be NULL.
1029 static MonoDelegateTrampInfo*
1030 create_delegate_trampoline_data (MonoDomain *domain, MonoClass *klass, MonoMethod *method)
1032 MonoDelegateTrampInfo *tramp_data;
1036 // Precompute the delegate invoke impl and pass it to the delegate trampoline
1037 invoke = mono_get_delegate_invoke (klass);
1040 tramp_data = (MonoDelegateTrampInfo *)mono_domain_alloc0 (domain, sizeof (MonoDelegateTrampInfo));
1041 tramp_data->invoke = invoke;
1042 tramp_data->invoke_sig = mono_method_signature (invoke);
1043 tramp_data->impl_this = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), TRUE);
1044 tramp_data->impl_nothis = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), FALSE);
1045 tramp_data->method = method;
1047 mono_error_init (&err);
1048 tramp_data->sig = mono_method_signature_checked (method, &err);
1049 tramp_data->need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (method, FALSE);
1056 * mono_delegate_trampoline:
1058 * This trampoline handles calls made to Delegate:Invoke ().
1059 * This is called once the first time a delegate is invoked, so it must be fast.
1062 mono_delegate_trampoline (mgreg_t *regs, guint8 *code, gpointer *arg, guint8* tramp)
1064 MonoDomain *domain = mono_domain_get ();
1065 MonoDelegate *delegate;
1068 MonoMethod *method = NULL;
1069 gboolean multicast, callvirt = FALSE, closed_over_null = FALSE;
1070 gboolean need_rgctx_tramp = FALSE;
1071 gboolean need_unbox_tramp = FALSE;
1072 gboolean enable_caching = TRUE;
1073 MonoDelegateTrampInfo *tramp_info = (MonoDelegateTrampInfo*)arg;
1074 MonoMethod *invoke = tramp_info->invoke;
1075 guint8 *impl_this = (guint8 *)tramp_info->impl_this;
1076 guint8 *impl_nothis = (guint8 *)tramp_info->impl_nothis;
1078 MonoMethodSignature *sig;
1079 gpointer addr, compiled_method;
1080 gboolean is_remote = FALSE;
1082 trampoline_calls ++;
1084 /* Obtain the delegate object according to the calling convention */
1085 delegate = (MonoDelegate *)mono_arch_get_this_arg_from_call (regs, code);
1086 g_assert (mono_class_has_parent (mono_object_class (delegate), mono_defaults.multicastdelegate_class));
1088 if (delegate->method) {
1089 method = delegate->method;
1092 * delegate->method_ptr == NULL means the delegate was initialized by
1093 * mini_delegate_ctor, while != NULL means it is initialized by
1094 * mono_delegate_ctor_with_method (). In both cases, we need to add wrappers
1095 * (ctor_with_method () does this, but it doesn't store the wrapper back into
1096 * delegate->method).
1098 #ifndef DISABLE_REMOTING
1099 if (delegate->target && delegate->target->vtable->klass == mono_defaults.transparent_proxy_class) {
1102 if (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class != mono_class_get_com_object_class () &&
1103 !mono_class_is_com_object (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class))
1105 method = mono_marshal_get_remoting_invoke (method);
1109 sig = tramp_info->sig;
1110 if (!(sig && method == tramp_info->method)) {
1111 mono_error_init (&err);
1112 sig = mono_method_signature_checked (method, &err);
1114 mono_error_raise_exception (&err);
1117 if (sig->hasthis && method->klass->valuetype) {
1118 gboolean need_unbox = TRUE;
1120 if (tramp_info->invoke_sig->param_count > sig->param_count && tramp_info->invoke_sig->params [0]->byref)
1125 need_unbox_tramp = TRUE;
1127 method = mono_marshal_get_unbox_wrapper (method);
1131 // If "delegate->method_ptr" is null mono_get_addr_from_ftnptr will fail if
1132 // ftnptrs are being used. "method" would end up null on archtitectures without
1133 // ftnptrs so we can just skip this.
1134 } else if (delegate->method_ptr) {
1135 ji = mono_jit_info_table_find (domain, (char *)mono_get_addr_from_ftnptr (delegate->method_ptr));
1137 method = jinfo_get_method (ji);
1141 sig = tramp_info->sig;
1142 if (!(sig && method == tramp_info->method)) {
1143 mono_error_init (&err);
1144 sig = mono_method_signature_checked (method, &err);
1146 mono_error_raise_exception (&err);
1149 callvirt = !delegate->target && sig->hasthis;
1151 closed_over_null = tramp_info->invoke_sig->param_count == sig->param_count;
1153 if (callvirt && !closed_over_null) {
1155 * The delegate needs to make a virtual call to the target method using its
1156 * first argument as the receiver. This is hard to support in full-aot, so
1157 * optimize it in some cases if possible.
1158 * If the target method is not virtual or is in a sealed class,
1159 * the vcall will call it directly.
1160 * If the call doesn't return a valuetype, then the vcall uses the same calling
1161 * convention as a normal call.
1163 if (((method->klass->flags & TYPE_ATTRIBUTE_SEALED) || !(method->flags & METHOD_ATTRIBUTE_VIRTUAL)) && !MONO_TYPE_ISSTRUCT (sig->ret)) {
1165 enable_caching = FALSE;
1169 if (delegate->target &&
1170 method->flags & METHOD_ATTRIBUTE_VIRTUAL &&
1171 method->flags & METHOD_ATTRIBUTE_ABSTRACT &&
1172 method->klass->flags & TYPE_ATTRIBUTE_ABSTRACT) {
1173 method = mono_object_get_virtual_method (delegate->target, method);
1174 enable_caching = FALSE;
1177 if (method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
1178 method = mono_marshal_get_synchronized_wrapper (method);
1180 if (method == tramp_info->method)
1181 need_rgctx_tramp = tramp_info->need_rgctx_tramp;
1182 else if (mono_method_needs_static_rgctx_invoke (method, FALSE))
1183 need_rgctx_tramp = TRUE;
1187 * If the called address is a trampoline, replace it with the compiled method so
1188 * further calls don't have to go through the trampoline.
1190 if (method && !callvirt) {
1191 /* Avoid the overhead of looking up an already compiled method if possible */
1192 if (enable_caching && delegate->method_code && *delegate->method_code) {
1193 delegate->method_ptr = *delegate->method_code;
1195 compiled_method = addr = mono_compile_method (method);
1196 addr = mini_add_method_trampoline (method, compiled_method, need_rgctx_tramp, need_unbox_tramp);
1197 delegate->method_ptr = addr;
1198 if (enable_caching && delegate->method_code)
1199 *delegate->method_code = (guint8 *)delegate->method_ptr;
1202 if (need_rgctx_tramp)
1203 delegate->method_ptr = mono_create_static_rgctx_trampoline (method, delegate->method_ptr);
1206 /* Necessary for !code condition to fallback to slow path */
1209 multicast = ((MonoMulticastDelegate*)delegate)->delegates != NULL;
1210 if (!multicast && !callvirt) {
1211 if (method && (method->flags & METHOD_ATTRIBUTE_STATIC) && mono_method_signature (method)->param_count == mono_method_signature (invoke)->param_count + 1)
1212 /* Closed static delegate */
1215 code = delegate->target ? impl_this : impl_nothis;
1219 /* The general, unoptimized case */
1220 m = mono_marshal_get_delegate_invoke (invoke, delegate);
1221 code = (guint8 *)mono_compile_method (m);
1222 code = (guint8 *)mini_add_method_trampoline (m, code, mono_method_needs_static_rgctx_invoke (m, FALSE), FALSE);
1225 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
1226 if (enable_caching && !callvirt && tramp_info->method) {
1227 tramp_info->method_ptr = delegate->method_ptr;
1228 tramp_info->invoke_impl = delegate->invoke_impl;
1234 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1236 mono_handler_block_guard_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_info, guint8* tramp)
1240 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
1241 gpointer resume_ip = jit_tls->handler_block_return_address;
1243 memcpy (&ctx, &jit_tls->handler_block_context, sizeof (MonoContext));
1244 MONO_CONTEXT_SET_IP (&ctx, jit_tls->handler_block_return_address);
1246 jit_tls->handler_block_return_address = NULL;
1247 jit_tls->handler_block = NULL;
1249 if (!resume_ip) /*this should not happen, but we should avoid crashing */
1250 exc = mono_get_exception_execution_engine ("Invalid internal state, resuming abort after handler block but no resume ip found");
1252 exc = mono_thread_resume_interruption ();
1255 mono_handle_exception (&ctx, (MonoObject *)exc);
1256 mono_restore_context (&ctx);
1263 mono_create_handler_block_trampoline (void)
1265 static gpointer code;
1267 mono_memory_barrier ();
1271 g_assert (!mono_aot_only);
1273 mono_trampolines_lock ();
1276 MonoTrampInfo *info;
1279 tmp = mono_arch_create_handler_block_trampoline (&info, FALSE);
1280 mono_tramp_info_register (info, NULL);
1281 mono_memory_barrier ();
1284 mono_trampolines_unlock ();
1291 * mono_get_trampoline_func:
1293 * Return the C function which needs to be called by the generic trampoline of type
1297 mono_get_trampoline_func (MonoTrampolineType tramp_type)
1299 switch (tramp_type) {
1300 case MONO_TRAMPOLINE_JIT:
1301 case MONO_TRAMPOLINE_JUMP:
1302 return mono_magic_trampoline;
1303 case MONO_TRAMPOLINE_RGCTX_LAZY_FETCH:
1304 return mono_rgctx_lazy_fetch_trampoline;
1305 #ifdef MONO_ARCH_AOT_SUPPORTED
1306 case MONO_TRAMPOLINE_AOT:
1307 return mono_aot_trampoline;
1308 case MONO_TRAMPOLINE_AOT_PLT:
1309 return mono_aot_plt_trampoline;
1311 case MONO_TRAMPOLINE_DELEGATE:
1312 return mono_delegate_trampoline;
1313 case MONO_TRAMPOLINE_RESTORE_STACK_PROT:
1314 return mono_altstack_restore_prot;
1315 #ifndef DISABLE_REMOTING
1316 case MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING:
1317 return mono_generic_virtual_remoting_trampoline;
1319 case MONO_TRAMPOLINE_VCALL:
1320 return mono_vcall_trampoline;
1321 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1322 case MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD:
1323 return mono_handler_block_guard_trampoline;
1326 g_assert_not_reached ();
1332 create_trampoline_code (MonoTrampolineType tramp_type)
1334 MonoTrampInfo *info;
1337 code = mono_arch_create_generic_trampoline (tramp_type, &info, FALSE);
1338 mono_tramp_info_register (info, NULL);
1344 mono_trampolines_init (void)
1346 mono_os_mutex_init_recursive (&trampolines_mutex);
1351 mono_trampoline_code [MONO_TRAMPOLINE_JIT] = create_trampoline_code (MONO_TRAMPOLINE_JIT);
1352 mono_trampoline_code [MONO_TRAMPOLINE_JUMP] = create_trampoline_code (MONO_TRAMPOLINE_JUMP);
1353 mono_trampoline_code [MONO_TRAMPOLINE_RGCTX_LAZY_FETCH] = create_trampoline_code (MONO_TRAMPOLINE_RGCTX_LAZY_FETCH);
1354 #ifdef MONO_ARCH_AOT_SUPPORTED
1355 mono_trampoline_code [MONO_TRAMPOLINE_AOT] = create_trampoline_code (MONO_TRAMPOLINE_AOT);
1356 mono_trampoline_code [MONO_TRAMPOLINE_AOT_PLT] = create_trampoline_code (MONO_TRAMPOLINE_AOT_PLT);
1358 mono_trampoline_code [MONO_TRAMPOLINE_DELEGATE] = create_trampoline_code (MONO_TRAMPOLINE_DELEGATE);
1359 mono_trampoline_code [MONO_TRAMPOLINE_RESTORE_STACK_PROT] = create_trampoline_code (MONO_TRAMPOLINE_RESTORE_STACK_PROT);
1360 #ifndef DISABLE_REMOTING
1361 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING);
1363 mono_trampoline_code [MONO_TRAMPOLINE_VCALL] = create_trampoline_code (MONO_TRAMPOLINE_VCALL);
1364 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1365 mono_trampoline_code [MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD] = create_trampoline_code (MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD);
1366 mono_create_handler_block_trampoline ();
1369 mono_counters_register ("Calls to trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &trampoline_calls);
1370 mono_counters_register ("JIT trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &jit_trampolines);
1371 mono_counters_register ("Unbox trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &unbox_trampolines);
1372 mono_counters_register ("Static rgctx trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &static_rgctx_trampolines);
1376 mono_trampolines_cleanup (void)
1378 if (rgctx_lazy_fetch_trampoline_hash)
1379 g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash);
1380 if (rgctx_lazy_fetch_trampoline_hash_addr)
1381 g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash_addr);
1383 mono_os_mutex_destroy (&trampolines_mutex);
1387 mono_get_trampoline_code (MonoTrampolineType tramp_type)
1389 g_assert (mono_trampoline_code [tramp_type]);
1391 return mono_trampoline_code [tramp_type];
1395 mono_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
1398 return mono_aot_create_specific_trampoline (mono_defaults.corlib, arg1, tramp_type, domain, code_len);
1400 return mono_arch_create_specific_trampoline (arg1, tramp_type, domain, code_len);
1404 mono_create_jump_trampoline (MonoDomain *domain, MonoMethod *method, gboolean add_sync_wrapper)
1408 guint32 code_size = 0;
1410 code = mono_jit_find_compiled_method_with_jit_info (domain, method, &ji);
1412 * We cannot recover the correct type of a shared generic
1413 * method from its native code address, so we use the
1414 * trampoline instead.
1415 * For synchronized methods, the trampoline adds the wrapper.
1417 if (code && !ji->has_generic_jit_info && !(method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED))
1421 return mono_jit_compile_method (method);
1423 mono_domain_lock (domain);
1424 code = g_hash_table_lookup (domain_jit_info (domain)->jump_trampoline_hash, method);
1425 mono_domain_unlock (domain);
1429 code = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JUMP, mono_domain_get (), &code_size);
1430 g_assert (code_size);
1432 ji = (MonoJitInfo *)mono_domain_alloc0 (domain, MONO_SIZEOF_JIT_INFO);
1433 ji->code_start = code;
1434 ji->code_size = code_size;
1435 ji->d.method = method;
1438 * mono_delegate_ctor needs to find the method metadata from the
1439 * trampoline address, so we save it here.
1442 mono_jit_info_table_add (domain, ji);
1444 mono_domain_lock (domain);
1445 g_hash_table_insert (domain_jit_info (domain)->jump_trampoline_hash, method, ji->code_start);
1446 mono_domain_unlock (domain);
1448 return ji->code_start;
1452 method_not_found (void)
1454 g_assert_not_reached ();
1458 mono_create_jit_trampoline_in_domain (MonoDomain *domain, MonoMethod *method)
1462 if (mono_aot_only) {
1463 /* Avoid creating trampolines if possible */
1464 gpointer code = mono_jit_find_compiled_method (domain, method);
1468 if (mono_llvm_only) {
1469 if (method->wrapper_type == MONO_WRAPPER_PROXY_ISINST || method->wrapper_type == MONO_WRAPPER_LDFLD_REMOTE ||
1470 method->wrapper_type == MONO_WRAPPER_STFLD_REMOTE)
1471 /* These wrappers are not generated */
1472 return method_not_found;
1473 /* Methods are lazily initialized on first call, so this can't lead recursion */
1474 return mono_compile_method (method);
1478 mono_domain_lock (domain);
1479 tramp = g_hash_table_lookup (domain_jit_info (domain)->jit_trampoline_hash, method);
1480 mono_domain_unlock (domain);
1484 tramp = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JIT, domain, NULL);
1486 mono_domain_lock (domain);
1487 g_hash_table_insert (domain_jit_info (domain)->jit_trampoline_hash, method, tramp);
1488 mono_domain_unlock (domain);
1496 mono_create_jit_trampoline (MonoMethod *method)
1498 return mono_create_jit_trampoline_in_domain (mono_domain_get (), method);
1502 mono_create_jit_trampoline_from_token (MonoImage *image, guint32 token)
1506 MonoDomain *domain = mono_domain_get ();
1507 guint8 *buf, *start;
1509 buf = start = (guint8 *)mono_domain_alloc0 (domain, 2 * sizeof (gpointer));
1511 *(gpointer*)(gpointer)buf = image;
1512 buf += sizeof (gpointer);
1513 *(guint32*)(gpointer)buf = token;
1515 tramp = mono_create_specific_trampoline (start, MONO_TRAMPOLINE_AOT, domain, NULL);
1524 * mono_create_delegate_trampoline_info:
1526 * Create a delegate trampoline for the KLASS+METHOD pair.
1528 MonoDelegateTrampInfo*
1529 mono_create_delegate_trampoline_info (MonoDomain *domain, MonoClass *klass, MonoMethod *method)
1531 MonoDelegateTrampInfo *tramp_info;
1532 MonoClassMethodPair pair, *dpair;
1533 guint32 code_size = 0;
1536 pair.method = method;
1537 mono_domain_lock (domain);
1538 tramp_info = (MonoDelegateTrampInfo *)g_hash_table_lookup (domain_jit_info (domain)->delegate_trampoline_hash, &pair);
1539 mono_domain_unlock (domain);
1543 tramp_info = create_delegate_trampoline_data (domain, klass, method);
1545 tramp_info->invoke_impl = mono_create_specific_trampoline (tramp_info, MONO_TRAMPOLINE_DELEGATE, domain, &code_size);
1546 g_assert (code_size);
1548 dpair = (MonoClassMethodPair *)mono_domain_alloc0 (domain, sizeof (MonoClassMethodPair));
1549 memcpy (dpair, &pair, sizeof (MonoClassMethodPair));
1551 /* store trampoline address */
1552 mono_domain_lock (domain);
1553 g_hash_table_insert (domain_jit_info (domain)->delegate_trampoline_hash, dpair, tramp_info);
1554 mono_domain_unlock (domain);
1560 no_delegate_trampoline (void)
1562 g_assert_not_reached ();
1566 mono_create_delegate_trampoline (MonoDomain *domain, MonoClass *klass)
1569 return no_delegate_trampoline;
1571 return mono_create_delegate_trampoline_info (domain, klass, NULL)->invoke_impl;
1575 mono_create_delegate_virtual_trampoline (MonoDomain *domain, MonoClass *klass, MonoMethod *method)
1577 MonoMethod *invoke = mono_get_delegate_invoke (klass);
1580 return mono_get_delegate_virtual_invoke_impl (mono_method_signature (invoke), method);
1584 mono_create_rgctx_lazy_fetch_trampoline (guint32 offset)
1586 static gboolean inited = FALSE;
1587 static int num_trampolines = 0;
1588 MonoTrampInfo *info;
1590 gpointer tramp, ptr;
1592 mono_trampolines_lock ();
1593 if (rgctx_lazy_fetch_trampoline_hash)
1594 tramp = g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset));
1597 mono_trampolines_unlock ();
1601 if (mono_aot_only) {
1602 ptr = mono_aot_get_lazy_fetch_trampoline (offset);
1604 tramp = mono_arch_create_rgctx_lazy_fetch_trampoline (offset, &info, FALSE);
1605 mono_tramp_info_register (info, NULL);
1606 ptr = mono_create_ftnptr (mono_get_root_domain (), tramp);
1609 mono_trampolines_lock ();
1610 if (!rgctx_lazy_fetch_trampoline_hash) {
1611 rgctx_lazy_fetch_trampoline_hash = g_hash_table_new (NULL, NULL);
1612 rgctx_lazy_fetch_trampoline_hash_addr = g_hash_table_new (NULL, NULL);
1614 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset), ptr);
1615 g_assert (offset != -1);
1616 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash_addr, ptr, GUINT_TO_POINTER (offset + 1));
1617 mono_trampolines_unlock ();
1620 mono_counters_register ("RGCTX num lazy fetch trampolines",
1621 MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_trampolines);
1630 mono_find_rgctx_lazy_fetch_trampoline_by_addr (gconstpointer addr)
1634 mono_trampolines_lock ();
1635 if (rgctx_lazy_fetch_trampoline_hash_addr) {
1636 /* We store the real offset + 1 so we can detect when the lookup fails */
1637 offset = GPOINTER_TO_INT (g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash_addr, addr));
1645 mono_trampolines_unlock ();
1649 static const char*tramp_names [MONO_TRAMPOLINE_NUM] = {
1656 "restore_stack_prot",
1657 "generic_virtual_remoting",
1659 "handler_block_guard"
1663 * mono_get_generic_trampoline_simple_name:
1667 mono_get_generic_trampoline_simple_name (MonoTrampolineType tramp_type)
1669 return tramp_names [tramp_type];
1673 * mono_get_generic_trampoline_name:
1675 * Returns a pointer to malloc-ed memory.
1678 mono_get_generic_trampoline_name (MonoTrampolineType tramp_type)
1680 return g_strdup_printf ("generic_trampoline_%s", tramp_names [tramp_type]);
1684 * mono_get_rgctx_fetch_trampoline_name:
1686 * Returns a pointer to malloc-ed memory.
1689 mono_get_rgctx_fetch_trampoline_name (int slot)
1694 mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
1695 index = MONO_RGCTX_SLOT_INDEX (slot);
1697 return g_strdup_printf ("rgctx_fetch_trampoline_%s_%d", mrgctx ? "mrgctx" : "rgctx", index);
1701 * mini_get_single_step_trampoline:
1703 * Return a trampoline which calls debugger_agent_single_step_from_context ().
1706 mini_get_single_step_trampoline (void)
1708 static gpointer trampoline;
1713 if (mono_aot_only) {
1714 tramp = mono_aot_get_trampoline ("sdb_single_step_trampoline");
1716 #ifdef MONO_ARCH_HAVE_SDB_TRAMPOLINES
1717 MonoTrampInfo *info;
1718 tramp = mono_arch_create_sdb_trampoline (TRUE, &info, FALSE);
1719 mono_tramp_info_register (info, NULL);
1722 g_assert_not_reached ();
1725 mono_memory_barrier ();
1733 * mini_get_breakpoint_trampoline:
1735 * Return a trampoline which calls debugger_agent_breakpoint_from_context ().
1738 mini_get_breakpoint_trampoline (void)
1740 static gpointer trampoline;
1745 if (mono_aot_only) {
1746 tramp = mono_aot_get_trampoline ("sdb_breakpoint_trampoline");
1748 #ifdef MONO_ARCH_HAVE_SDB_TRAMPOLINES
1749 MonoTrampInfo *info;
1750 tramp = mono_arch_create_sdb_trampoline (FALSE, &info, FALSE);
1751 mono_tramp_info_register (info, NULL);
1754 g_assert_not_reached ();
1757 mono_memory_barrier ();