2 * (C) 2003 Ximian, Inc.
3 * (C) 2003-2011 Novell, Inc.
4 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
5 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
10 #include <mono/metadata/appdomain.h>
11 #include <mono/metadata/metadata-internals.h>
12 #include <mono/metadata/marshal.h>
13 #include <mono/metadata/tabledefs.h>
14 #include <mono/utils/mono-counters.h>
15 #include <mono/utils/mono-error-internals.h>
16 #include <mono/utils/mono-membar.h>
17 #include <mono/utils/mono-compiler.h>
18 #include <mono/utils/mono-threads-coop.h>
23 #ifdef ENABLE_INTERPRETER
24 #include "interp/interp.h"
28 * Address of the trampoline code. This is used by the debugger to check
29 * whether a method is a trampoline.
31 guint8* mono_trampoline_code [MONO_TRAMPOLINE_NUM];
33 static GHashTable *rgctx_lazy_fetch_trampoline_hash;
34 static GHashTable *rgctx_lazy_fetch_trampoline_hash_addr;
35 static guint32 trampoline_calls, jit_trampolines, unbox_trampolines, static_rgctx_trampolines;
37 #define mono_trampolines_lock() mono_os_mutex_lock (&trampolines_mutex)
38 #define mono_trampolines_unlock() mono_os_mutex_unlock (&trampolines_mutex)
39 static mono_mutex_t trampolines_mutex;
41 #ifdef MONO_ARCH_GSHARED_SUPPORTED
49 rgctx_tramp_info_equal (gconstpointer ka, gconstpointer kb)
51 const RgctxTrampInfo *i1 = (const RgctxTrampInfo *)ka;
52 const RgctxTrampInfo *i2 = (const RgctxTrampInfo *)kb;
54 if (i1->m == i2->m && i1->addr == i2->addr)
61 rgctx_tramp_info_hash (gconstpointer data)
63 const RgctxTrampInfo *info = (const RgctxTrampInfo *)data;
65 return GPOINTER_TO_UINT (info->m) ^ GPOINTER_TO_UINT (info->addr);
69 * mono_create_static_rgctx_trampoline:
70 * @m: the mono method to create a trampoline for
71 * @addr: the address to jump to (where the compiled code for M lives)
73 * Creates a static rgctx trampoline for M which branches to ADDR which should
74 * point to the compiled code of M.
76 * Static rgctx trampolines are used when a shared generic method which doesn't
77 * have a this argument is called indirectly, ie. from code which can't pass in
78 * the rgctx argument. The trampoline sets the rgctx argument and jumps to the
79 * methods code. These trampolines are similar to the unbox trampolines, they
80 * perform the same task as the static rgctx wrappers, but they are smaller/faster,
81 * and can be made to work with full AOT.
83 * On PPC addr should be an ftnptr and the return value is an ftnptr too.
85 * Returns the generated static rgctx trampoline.
88 mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr)
93 RgctxTrampInfo tmp_info;
96 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
97 g_assert (((gpointer*)addr) [2] == 0);
100 ctx = mini_method_get_rgctx (m);
102 domain = mono_domain_get ();
105 * In the AOT case, addr might point to either the method, or to an unbox trampoline,
106 * so make the hash keyed on the m+addr pair.
108 mono_domain_lock (domain);
109 if (!domain_jit_info (domain)->static_rgctx_trampoline_hash)
110 domain_jit_info (domain)->static_rgctx_trampoline_hash = g_hash_table_new (rgctx_tramp_info_hash, rgctx_tramp_info_equal);
112 tmp_info.addr = addr;
113 res = g_hash_table_lookup (domain_jit_info (domain)->static_rgctx_trampoline_hash,
115 mono_domain_unlock (domain);
120 res = mono_aot_get_static_rgctx_trampoline (ctx, addr);
122 res = mono_arch_get_static_rgctx_trampoline (m, (MonoMethodRuntimeGenericContext *)ctx, addr);
124 mono_domain_lock (domain);
125 /* Duplicates inserted while we didn't hold the lock are OK */
126 info = (RgctxTrampInfo *)mono_domain_alloc (domain, sizeof (RgctxTrampInfo));
129 g_hash_table_insert (domain_jit_info (domain)->static_rgctx_trampoline_hash, info, res);
130 mono_domain_unlock (domain);
132 static_rgctx_trampolines ++;
138 mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr)
141 * This shouldn't happen as all arches which support generic sharing support
142 * static rgctx trampolines as well.
144 g_assert_not_reached ();
149 #define DEBUG_IMT(stmt) do { stmt; } while (0)
151 #define DEBUG_IMT(stmt) do { } while (0)
155 * mini_resolve_imt_method:
157 * Resolve the actual method called when making an IMT call through VTABLE_SLOT with IMT_METHOD as the interface method.
159 * Either IMPL_METHOD or OUT_AOT_ADDR will be set on return.
162 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, MonoError *error)
164 MonoMethod *impl = NULL, *generic_virtual = NULL;
165 gboolean lookup_aot, variance_used = FALSE, need_rgctx_tramp = FALSE;
167 guint8 *aot_addr = NULL;
168 int displacement = vtable_slot - ((gpointer*)vt);
169 int interface_offset;
170 int imt_slot = MONO_IMT_SIZE + displacement;
172 g_assert (imt_slot < MONO_IMT_SIZE);
175 /* This has to be variance aware since imt_method can be from an interface that vt->klass doesn't directly implement */
176 interface_offset = mono_class_interface_offset_with_variance (vt->klass, imt_method->klass, &variance_used);
177 if (interface_offset < 0)
178 g_error ("%s doesn't implement interface %s\n", mono_type_get_name_full (&vt->klass->byval_arg, MONO_TYPE_NAME_FORMAT_IL), mono_type_get_name_full (&imt_method->klass->byval_arg, MONO_TYPE_NAME_FORMAT_IL));
180 *variant_iface = NULL;
181 if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) {
182 /* Generic virtual method */
183 generic_virtual = imt_method;
184 need_rgctx_tramp = TRUE;
185 } else if (variance_used && mono_class_has_variant_generic_params (imt_method->klass)) {
186 *variant_iface = imt_method;
190 /* We can only use the AOT compiled code if we don't require further processing */
191 lookup_aot = !generic_virtual & !variant_iface;
194 mono_vtable_build_imt_slot (vt, mono_method_get_imt_slot (imt_method));
196 if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) {
197 MonoGenericContext context = { NULL, NULL };
200 * Generic virtual method, imt_method contains the inflated interface
201 * method, need to get the inflated impl method.
203 /* imt_method->slot might not be set */
204 impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_declaring_generic_method (imt_method)->slot);
206 if (mono_class_is_ginst (impl->klass))
207 context.class_inst = mono_class_get_generic_class (impl->klass)->context.class_inst;
208 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
209 impl = mono_class_inflate_generic_method_checked (impl, &context, error);
210 mono_error_assert_ok (error);
213 /* Avoid loading metadata or creating a generic vtable if possible */
214 if (lookup_aot && !vt->klass->valuetype) {
215 aot_addr = (guint8 *)mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, interface_offset + mono_method_get_vtable_slot (imt_method), error);
216 return_val_if_nok (error, NULL);
223 impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_vtable_slot (imt_method));
226 if (impl && mono_method_needs_static_rgctx_invoke (impl, FALSE))
227 need_rgctx_tramp = TRUE;
228 if (impl && impl->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED) {
229 WrapperInfo *info = mono_marshal_get_wrapper_info (impl);
231 if (info && info->subtype == WRAPPER_SUBTYPE_GENERIC_ARRAY_HELPER)
232 need_rgctx_tramp = TRUE;
235 *out_need_rgctx_tramp = need_rgctx_tramp;
236 *out_aot_addr = aot_addr;
238 DEBUG_IMT (printf ("mono_convert_imt_slot_to_vtable_slot: method = %s.%s.%s, imt_method = %s.%s.%s\n",
239 method->klass->name_space, method->klass->name, method->name,
240 imt_method->klass->name_space, imt_method->klass->name, imt_method->name));
242 if (vt->imt_collisions_bitmap & (1 << imt_slot)) {
243 int slot = mono_method_get_vtable_index (imt_method);
246 g_assert (slot != -1);
247 vtable_offset = interface_offset + slot;
248 vtable_slot = & (vt->vtable [vtable_offset]);
249 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));
252 DEBUG_IMT (printf ("mono_convert_imt_slot_to_vtable_slot: slot %p[%d] is in the IMT, but not colliding\n", slot, imt_slot));
258 * This is a super-ugly hack to fix bug #616463.
260 * The problem is that we don't always set is_generic for generic
261 * method definitions. See the comment at the end of
262 * mono_class_inflate_generic_method_full_checked() in class.c.
265 is_generic_method_definition (MonoMethod *m)
267 MonoGenericContext *context;
273 context = mono_method_get_context (m);
274 if (!context->method_inst)
276 if (context->method_inst == mono_method_get_generic_container (((MonoMethodInflated*)m)->declaring)->context.method_inst)
282 mini_jit_info_is_gsharedvt (MonoJitInfo *ji)
284 if (ji && ji->has_generic_jit_info && (mono_jit_info_get_generic_sharing_context (ji)->is_gsharedvt))
291 * mini_add_method_trampoline:
294 * @add_static_rgctx_tramp: adds a static rgctx trampoline
295 * @add_unbox_tramp: adds an unboxing trampoline
297 * Add static rgctx/gsharedvt_in/unbox trampolines to
298 * M/COMPILED_METHOD if needed.
300 * Returns the trampoline address, or COMPILED_METHOD if no trampoline
304 mini_add_method_trampoline (MonoMethod *m, gpointer compiled_method, gboolean add_static_rgctx_tramp, gboolean add_unbox_tramp)
306 gpointer addr = compiled_method;
307 gboolean callee_gsharedvt, callee_array_helper;
308 MonoMethod *jmethod = NULL;
311 // FIXME: This loads information from AOT (perf problem)
312 ji = mini_jit_info_table_find (mono_domain_get (), (char *)mono_get_addr_from_ftnptr (compiled_method), NULL);
313 callee_gsharedvt = mini_jit_info_is_gsharedvt (ji);
315 callee_array_helper = FALSE;
316 if (m->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED) {
317 WrapperInfo *info = mono_marshal_get_wrapper_info (m);
320 * generic array helpers.
321 * Have to replace the wrappers with the original generic instances.
323 if (info && info->subtype == WRAPPER_SUBTYPE_GENERIC_ARRAY_HELPER) {
324 callee_array_helper = TRUE;
325 m = info->d.generic_array_helper.method;
327 } else if (m->wrapper_type == MONO_WRAPPER_UNKNOWN) {
328 WrapperInfo *info = mono_marshal_get_wrapper_info (m);
330 /* Same for synchronized inner wrappers */
331 if (info && info->subtype == WRAPPER_SUBTYPE_SYNCHRONIZED_INNER) {
332 m = info->d.synchronized_inner.method;
336 if (callee_gsharedvt)
337 g_assert (m->is_inflated);
339 addr = compiled_method;
341 if (add_unbox_tramp) {
343 * The unbox trampolines call the method directly, so need to add
344 * an rgctx tramp before them.
347 addr = mono_aot_get_unbox_trampoline (m);
349 unbox_trampolines ++;
350 addr = mono_arch_get_unbox_trampoline (m, addr);
354 if (ji && !ji->is_trampoline)
355 jmethod = jinfo_get_method (ji);
356 if (callee_gsharedvt && mini_is_gsharedvt_variable_signature (mono_method_signature (jmethod))) {
357 MonoMethodSignature *sig, *gsig;
359 /* Here m is a generic instance, while ji->method is the gsharedvt method implementing it */
361 /* Call from normal/gshared code to gsharedvt code with variable signature */
362 sig = mono_method_signature (m);
363 gsig = mono_method_signature (jmethod);
365 addr = mini_get_gsharedvt_wrapper (TRUE, addr, sig, gsig, -1, FALSE);
368 g_assert_not_reached ();
369 //printf ("IN: %s\n", mono_method_full_name (m, TRUE));
372 if (callee_array_helper) {
373 add_static_rgctx_tramp = FALSE;
374 /* In AOT mode, compiled_method points to one of the InternalArray methods in Array. */
375 if (ji && !mono_llvm_only && mono_method_needs_static_rgctx_invoke (jinfo_get_method (ji), TRUE))
376 add_static_rgctx_tramp = TRUE;
380 add_static_rgctx_tramp = FALSE;
382 if (add_static_rgctx_tramp)
383 addr = mono_create_static_rgctx_trampoline (m, addr);
389 * mini_create_llvmonly_ftndesc:
391 * Create a function descriptor of the form <addr, arg>, which
392 * represents a callee ADDR with ARG as the last argument.
394 * - generic sharing (ARG is the rgctx)
395 * - gsharedvt signature wrappers (ARG is a function descriptor)
398 mini_create_llvmonly_ftndesc (MonoDomain *domain, gpointer addr, gpointer arg)
400 MonoFtnDesc *ftndesc = (MonoFtnDesc*)mono_domain_alloc0 (mono_domain_get (), 2 * sizeof (gpointer));
401 ftndesc->addr = addr;
408 * mini_add_method_wrappers_llvmonly:
410 * Add unbox/gsharedvt wrappers around COMPILED_METHOD if needed. Return the wrapper address or COMPILED_METHOD
411 * if no wrapper is needed. Set OUT_ARG to the rgctx/extra argument needed to be passed to the returned method.
414 mini_add_method_wrappers_llvmonly (MonoMethod *m, gpointer compiled_method, gboolean caller_gsharedvt, gboolean add_unbox_tramp, gpointer *out_arg)
417 gboolean callee_gsharedvt, callee_array_helper;
418 MonoMethod *jmethod = NULL;
421 // FIXME: This loads information from AOT (perf problem)
422 ji = mini_jit_info_table_find (mono_domain_get (), (char *)mono_get_addr_from_ftnptr (compiled_method), NULL);
423 callee_gsharedvt = mini_jit_info_is_gsharedvt (ji);
425 callee_array_helper = FALSE;
426 if (m->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED) {
427 WrapperInfo *info = mono_marshal_get_wrapper_info (m);
430 * generic array helpers.
431 * Have to replace the wrappers with the original generic instances.
433 if (info && info->subtype == WRAPPER_SUBTYPE_GENERIC_ARRAY_HELPER) {
434 callee_array_helper = TRUE;
435 m = info->d.generic_array_helper.method;
437 } else if (m->wrapper_type == MONO_WRAPPER_UNKNOWN) {
438 WrapperInfo *info = mono_marshal_get_wrapper_info (m);
440 /* Same for synchronized inner wrappers */
441 if (info && info->subtype == WRAPPER_SUBTYPE_SYNCHRONIZED_INNER) {
442 m = info->d.synchronized_inner.method;
446 if (callee_gsharedvt)
447 g_assert (m->is_inflated);
449 addr = compiled_method;
451 if (add_unbox_tramp) {
453 * The unbox trampolines call the method directly, so need to add
454 * an rgctx tramp before them.
457 addr = mono_aot_get_unbox_trampoline (m);
459 unbox_trampolines ++;
460 addr = mono_arch_get_unbox_trampoline (m, addr);
464 g_assert (mono_llvm_only);
467 if (ji && !ji->is_trampoline)
468 jmethod = jinfo_get_method (ji);
470 if (callee_gsharedvt)
471 callee_gsharedvt = mini_is_gsharedvt_variable_signature (mono_method_signature (jmethod));
473 if (!caller_gsharedvt && callee_gsharedvt) {
474 MonoMethodSignature *sig, *gsig;
475 gpointer wrapper_addr;
477 /* Here m is a generic instance, while ji->method is the gsharedvt method implementing it */
479 /* Call from normal/gshared code to gsharedvt code with variable signature */
480 sig = mono_method_signature (m);
481 gsig = mono_method_signature (jmethod);
483 wrapper_addr = mini_get_gsharedvt_wrapper (TRUE, addr, sig, gsig, -1, FALSE);
486 * This is a gsharedvt in wrapper, it gets passed a ftndesc for the gsharedvt method as an argument.
488 *out_arg = mini_create_llvmonly_ftndesc (mono_domain_get (), addr, mini_method_get_rgctx (m));
490 //printf ("IN: %s\n", mono_method_full_name (m, TRUE));
493 if (!(*out_arg) && mono_method_needs_static_rgctx_invoke (m, FALSE))
494 *out_arg = mini_method_get_rgctx (m);
496 if (caller_gsharedvt && !callee_gsharedvt) {
498 * The callee uses the gsharedvt calling convention, have to add an out wrapper.
500 gpointer out_wrapper = mini_get_gsharedvt_wrapper (FALSE, NULL, mono_method_signature (m), NULL, -1, FALSE);
501 MonoFtnDesc *out_wrapper_arg = mini_create_llvmonly_ftndesc (mono_domain_get (), addr, *out_arg);
504 *out_arg = out_wrapper_arg;
511 * common_call_trampoline:
513 * The code to handle normal, virtual, and interface method calls and jumps, both
514 * from JITted and LLVM compiled code.
517 common_call_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, MonoVTable *vt, gpointer *vtable_slot, MonoError *error)
519 gpointer addr, compiled_method;
520 gboolean generic_shared = FALSE;
521 gboolean need_unbox_tramp = FALSE;
522 gboolean need_rgctx_tramp = FALSE;
523 MonoMethod *declaring = NULL;
524 MonoMethod *generic_virtual = NULL, *variant_iface = NULL;
526 gboolean imt_call, virtual_;
527 gpointer *orig_vtable_slot, *vtable_slot_to_patch = NULL;
528 MonoJitInfo *ji = NULL;
532 virtual_ = vt && (gpointer)vtable_slot > (gpointer)vt;
533 imt_call = vt && (gpointer)vtable_slot < (gpointer)vt;
536 * rgctx trampolines are needed when the call is indirect so the caller can't pass
537 * the rgctx argument needed by the callee.
540 need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (m, FALSE);
542 orig_vtable_slot = vtable_slot;
543 vtable_slot_to_patch = vtable_slot;
547 MonoMethod *imt_method = NULL, *impl_method = NULL;
548 MonoObject *this_arg;
550 g_assert (vtable_slot);
552 imt_method = mono_arch_find_imt_method (regs, code);
553 this_arg = (MonoObject *)mono_arch_get_this_arg_from_call (regs, code);
555 if (mono_object_is_transparent_proxy (this_arg)) {
556 /* Use the slow path for now */
557 m = mono_object_get_virtual_method (this_arg, imt_method);
558 vtable_slot_to_patch = NULL;
560 if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) {
561 /* Generic virtual method */
562 generic_virtual = imt_method;
563 need_rgctx_tramp = TRUE;
566 vtable_slot = mini_resolve_imt_method (vt, vtable_slot, imt_method, &impl_method, &addr, &need_rgctx_tramp, &variant_iface, error);
567 return_val_if_nok (error, NULL);
569 /* This is the vcall slot which gets called through the IMT trampoline */
570 vtable_slot_to_patch = vtable_slot;
574 * We found AOT compiled code for the method, skip the rest.
576 if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
579 return mono_create_ftnptr (mono_domain_get (), addr);
587 * The virtual check is needed because is_generic_method_definition (m) could
588 * return TRUE for methods used in IMT calls too.
590 if (virtual_ && is_generic_method_definition (m)) {
591 MonoGenericContext context = { NULL, NULL };
592 MonoMethod *declaring;
595 declaring = mono_method_get_declaring_generic_method (m);
599 if (mono_class_is_ginst (m->klass))
600 context.class_inst = mono_class_get_generic_class (m->klass)->context.class_inst;
602 g_assert (!mono_class_is_gtd (m->klass));
604 generic_virtual = mono_arch_find_imt_method (regs, code);
605 g_assert (generic_virtual);
606 g_assert (generic_virtual->is_inflated);
607 context.method_inst = ((MonoMethodInflated*)generic_virtual)->context.method_inst;
609 m = mono_class_inflate_generic_method_checked (declaring, &context, error);
610 mono_error_assert_ok (error);
611 /* FIXME: only do this if the method is sharable */
612 need_rgctx_tramp = TRUE;
613 } else if ((context_used = mono_method_check_context_used (m))) {
614 MonoClass *klass = NULL;
615 MonoMethod *actual_method = NULL;
616 MonoVTable *vt = NULL;
617 MonoGenericInst *method_inst = NULL;
620 generic_shared = TRUE;
625 * The caller is gshared code, compute the actual method to call from M and this/rgctx.
627 if (m->is_inflated && mono_method_get_context (m)->method_inst) {
628 MonoMethodRuntimeGenericContext *mrgctx = (MonoMethodRuntimeGenericContext*)mono_arch_find_static_call_vtable (regs, code);
630 klass = mrgctx->class_vtable->klass;
631 method_inst = mrgctx->method_inst;
632 } else if ((m->flags & METHOD_ATTRIBUTE_STATIC) || m->klass->valuetype) {
633 MonoVTable *vtable = mono_arch_find_static_call_vtable (regs, code);
635 klass = vtable->klass;
637 MonoObject *this_argument = (MonoObject *)mono_arch_get_this_arg_from_call (regs, code);
639 vt = this_argument->vtable;
640 vtable_slot = orig_vtable_slot;
642 g_assert (this_argument->vtable->klass->inited);
645 mono_class_setup_supertypes (this_argument->vtable->klass);
646 klass = this_argument->vtable->klass->supertypes [m->klass->idepth - 1];
650 g_assert (vtable_slot || klass);
653 int displacement = vtable_slot - ((gpointer*)vt);
655 g_assert_not_reached ();
657 g_assert (displacement > 0);
659 actual_method = vt->klass->vtable [displacement];
662 if (method_inst || m->wrapper_type) {
663 MonoGenericContext context = { NULL, NULL };
666 declaring = mono_method_get_declaring_generic_method (m);
670 if (mono_class_is_ginst (klass))
671 context.class_inst = mono_class_get_generic_class (klass)->context.class_inst;
672 else if (mono_class_is_gtd (klass))
673 context.class_inst = mono_class_get_generic_container (klass)->context.class_inst;
674 context.method_inst = method_inst;
676 actual_method = mono_class_inflate_generic_method_checked (declaring, &context, error);
677 mono_error_assert_ok (error);
679 actual_method = mono_class_get_method_generic (klass, m);
683 g_assert (actual_method);
684 g_assert (actual_method->klass == klass);
686 if (actual_method->is_inflated)
687 declaring = mono_method_get_declaring_generic_method (actual_method);
694 if (m->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) {
695 m = mono_marshal_get_synchronized_wrapper (m);
696 need_rgctx_tramp = FALSE;
699 /* Calls made through delegates on platforms without delegate trampolines */
700 if (!code && mono_method_needs_static_rgctx_invoke (m, FALSE))
701 need_rgctx_tramp = TRUE;
703 addr = compiled_method = mono_jit_compile_method (m, error);
707 if (generic_virtual || variant_iface) {
708 if (vt->klass->valuetype) /*FIXME is this required variant iface?*/
709 need_unbox_tramp = TRUE;
710 } else if (orig_vtable_slot) {
711 if (m->klass->valuetype)
712 need_unbox_tramp = TRUE;
715 addr = mini_add_method_trampoline (m, compiled_method, need_rgctx_tramp, need_unbox_tramp);
717 if (generic_virtual || variant_iface) {
718 MonoMethod *target = generic_virtual ? generic_virtual : variant_iface;
720 vtable_slot = orig_vtable_slot;
721 g_assert (vtable_slot);
723 mono_method_add_generic_virtual_invocation (mono_domain_get (),
730 /* the method was jumped to */
732 MonoDomain *domain = mono_domain_get ();
734 /* Patch the got entries pointing to this method */
736 * We do this here instead of in mono_codegen () to cover the case when m
737 * was loaded from an aot image.
739 if (domain_jit_info (domain)->jump_target_got_slot_hash) {
742 mono_domain_lock (domain);
743 list = (GSList *)g_hash_table_lookup (domain_jit_info (domain)->jump_target_got_slot_hash, m);
745 for (tmp = list; tmp; tmp = tmp->next) {
746 gpointer *got_slot = (gpointer *)tmp->data;
749 g_hash_table_remove (domain_jit_info (domain)->jump_target_got_slot_hash, m);
752 mono_domain_unlock (domain);
758 vtable_slot = orig_vtable_slot;
761 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))) {
762 g_assert (*vtable_slot_to_patch);
763 *vtable_slot_to_patch = mono_get_addr_from_ftnptr (addr);
766 guint8 *plt_entry = mono_aot_get_plt_entry (code);
767 gboolean no_patch = FALSE;
768 MonoJitInfo *target_ji;
771 if (generic_shared) {
773 mini_jit_info_table_find (mono_domain_get (), (char *)mono_get_addr_from_ftnptr (compiled_method), NULL);
775 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
777 if (ji && target_ji && generic_shared && ji->has_generic_jit_info && !target_ji->has_generic_jit_info) {
782 mono_aot_patch_plt_entry (code, plt_entry, NULL, regs, (guint8 *)addr);
784 if (generic_shared) {
785 if (m->wrapper_type != MONO_WRAPPER_NONE)
786 m = mono_marshal_method_from_wrapper (m);
787 //g_assert (mono_method_is_generic_sharable (m, FALSE));
790 /* Patch calling code */
792 mini_jit_info_table_find (mono_domain_get (), (char *)mono_get_addr_from_ftnptr (compiled_method), NULL);
794 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
796 if (ji && target_ji && generic_shared && ji->has_generic_jit_info && !target_ji->has_generic_jit_info) {
798 * Can't patch the call as the caller is gshared, but the callee is not. Happens when
799 * generic sharing fails.
800 * FIXME: Performance problem.
804 #if LLVM_API_VERSION > 100
805 /* LLVM code doesn't make direct calls */
806 if (ji && ji->from_llvm)
809 if (!no_patch && mono_method_same_domain (ji, target_ji))
810 mono_arch_patch_callsite ((guint8 *)ji->code_start, code, (guint8 *)addr);
818 * mono_magic_trampoline:
820 * This trampoline handles normal calls from JITted code.
823 mono_magic_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp)
827 MONO_ENTER_GC_UNSAFE_UNBALANCED;
833 res = common_call_trampoline (regs, code, (MonoMethod *)arg, NULL, NULL, &error);
834 mono_error_set_pending_exception (&error);
836 mono_interruption_checkpoint_from_trampoline ();
838 MONO_EXIT_GC_UNSAFE_UNBALANCED;
844 * mono_vcall_trampoline:
846 * This trampoline handles virtual calls.
849 mono_vcall_trampoline (mgreg_t *regs, guint8 *code, int slot, guint8 *tramp)
851 MONO_REQ_GC_UNSAFE_MODE;
853 MonoObject *this_arg;
855 gpointer *vtable_slot;
858 gpointer addr, res = NULL;
863 * We need to obtain the following pieces of information:
864 * - the method which needs to be compiled.
866 * We use one vtable trampoline per vtable slot index, so we need only the vtable,
867 * the other two can be computed from the vtable + the slot index.
871 * Obtain the vtable from the 'this' arg.
873 this_arg = (MonoObject *)mono_arch_get_this_arg_from_call (regs, code);
876 vt = this_arg->vtable;
879 /* Normal virtual call */
880 vtable_slot = &(vt->vtable [slot]);
882 /* Avoid loading metadata or creating a generic vtable if possible */
883 addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, slot, &error);
886 if (addr && !vt->klass->valuetype) {
887 if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
890 return mono_create_ftnptr (mono_domain_get (), addr);
895 * is_generic_method_definition() above) also
896 * goes away if we do a
897 * mono_class_setup_vtable (vt->klass) here,
898 * because we then inflate the method
899 * correctly, put it in the cache, and the
900 * "wrong" inflation invocation still looks up
901 * the correctly inflated method.
903 * The hack above seems more stable and
906 m = mono_class_get_vtable_entry (vt->klass, slot);
909 vtable_slot = &(((gpointer*)vt) [slot]);
914 res = common_call_trampoline (regs, code, m, vt, vtable_slot, &error);
916 if (!mono_error_ok (&error)) {
917 mono_error_set_pending_exception (&error);
923 #ifndef DISABLE_REMOTING
925 mono_generic_virtual_remoting_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8 *tramp)
927 MONO_REQ_GC_UNSAFE_MODE;
930 MonoGenericContext context = { NULL, NULL };
931 MonoMethod *imt_method, *declaring;
936 g_assert (m->is_generic);
939 declaring = mono_method_get_declaring_generic_method (m);
943 if (mono_class_is_ginst (m->klass))
944 context.class_inst = mono_class_get_generic_class (m->klass)->context.class_inst;
946 g_assert (!mono_class_is_gtd (m->klass));
948 imt_method = mono_arch_find_imt_method (regs, code);
949 if (imt_method->is_inflated)
950 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
951 m = mono_class_inflate_generic_method_checked (declaring, &context, &error);
952 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */;
953 m = mono_marshal_get_remoting_invoke_with_check (m);
955 addr = mono_jit_compile_method (m, &error);
956 if (!mono_error_ok (&error)) {
957 mono_error_set_pending_exception (&error);
967 * mono_aot_trampoline:
969 * This trampoline handles calls made from AOT code. We try to bypass the
970 * normal JIT compilation logic to avoid loading the metadata for the method.
972 #ifdef MONO_ARCH_AOT_SUPPORTED
974 mono_aot_trampoline (mgreg_t *regs, guint8 *code, guint8 *token_info,
977 MONO_REQ_GC_UNSAFE_MODE;
981 MonoMethod *method = NULL;
988 image = (MonoImage *)*(gpointer*)(gpointer)token_info;
989 token_info += sizeof (gpointer);
990 token = *(guint32*)(gpointer)token_info;
992 addr = mono_aot_get_method_from_token (mono_domain_get (), image, token, &error);
994 mono_error_cleanup (&error);
996 method = mono_get_method_checked (image, token, NULL, NULL, &error);
998 g_error ("Could not load AOT trampoline due to %s", mono_error_get_message (&error));
1000 /* Use the generic code */
1001 return mono_magic_trampoline (regs, code, method, tramp);
1004 addr = mono_create_ftnptr (mono_domain_get (), addr);
1006 /* This is a normal call through a PLT entry */
1007 plt_entry = mono_aot_get_plt_entry (code);
1008 g_assert (plt_entry);
1010 mono_aot_patch_plt_entry (code, plt_entry, NULL, regs, (guint8 *)addr);
1016 * mono_aot_plt_trampoline:
1018 * This trampoline handles calls made from AOT code through the PLT table.
1021 mono_aot_plt_trampoline (mgreg_t *regs, guint8 *code, guint8 *aot_module,
1024 MONO_REQ_GC_UNSAFE_MODE;
1026 guint32 plt_info_offset = mono_aot_get_plt_info_offset (regs, code);
1030 trampoline_calls ++;
1032 res = mono_aot_plt_resolve (aot_module, plt_info_offset, code, &error);
1034 if (!mono_error_ok (&error)) {
1035 mono_error_set_pending_exception (&error);
1038 // FIXME: Error handling (how ?)
1047 mono_rgctx_lazy_fetch_trampoline (mgreg_t *regs, guint8 *code, gpointer data, guint8 *tramp)
1049 MONO_REQ_GC_UNSAFE_MODE;
1051 static gboolean inited = FALSE;
1052 static int num_lookups = 0;
1053 guint32 slot = GPOINTER_TO_UINT (data);
1054 mgreg_t *r = (mgreg_t*)regs;
1055 gpointer arg = (gpointer)(gssize)r [MONO_ARCH_VTABLE_REG];
1056 guint32 index = MONO_RGCTX_SLOT_INDEX (slot);
1057 gboolean mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
1061 trampoline_calls ++;
1064 mono_counters_register ("RGCTX unmanaged lookups", MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_lookups);
1071 res = mono_method_fill_runtime_generic_context ((MonoMethodRuntimeGenericContext *)arg, index, &error);
1073 res = mono_class_fill_runtime_generic_context ((MonoVTable *)arg, index, &error);
1074 if (!mono_error_ok (&error)) {
1075 mono_error_set_pending_exception (&error);
1082 * mono_delegate_trampoline:
1084 * This trampoline handles calls made to Delegate:Invoke ().
1085 * This is called once the first time a delegate is invoked, so it must be fast.
1088 mono_delegate_trampoline (mgreg_t *regs, guint8 *code, gpointer *arg, guint8* tramp)
1090 MONO_REQ_GC_UNSAFE_MODE;
1092 MonoDomain *domain = mono_domain_get ();
1093 MonoDelegate *delegate;
1096 MonoMethod *method = NULL;
1098 gboolean multicast, callvirt = FALSE, closed_over_null = FALSE;
1099 gboolean need_rgctx_tramp = FALSE;
1100 gboolean need_unbox_tramp = FALSE;
1101 gboolean enable_caching = TRUE;
1102 MonoDelegateTrampInfo *tramp_info = (MonoDelegateTrampInfo*)arg;
1103 MonoMethod *invoke = tramp_info->invoke;
1104 guint8 *impl_this = (guint8 *)tramp_info->impl_this;
1105 guint8 *impl_nothis = (guint8 *)tramp_info->impl_nothis;
1107 MonoMethodSignature *sig;
1108 gpointer addr, compiled_method;
1109 gboolean is_remote = FALSE;
1111 trampoline_calls ++;
1113 /* Obtain the delegate object according to the calling convention */
1114 delegate = (MonoDelegate *)mono_arch_get_this_arg_from_call (regs, code);
1115 g_assert (mono_class_has_parent (mono_object_class (delegate), mono_defaults.multicastdelegate_class));
1117 if (delegate->method) {
1118 method = delegate->method;
1121 * delegate->method_ptr == NULL means the delegate was initialized by
1122 * mini_delegate_ctor, while != NULL means it is initialized by
1123 * mono_delegate_ctor_with_method (). In both cases, we need to add wrappers
1124 * (ctor_with_method () does this, but it doesn't store the wrapper back into
1125 * delegate->method).
1127 #ifndef DISABLE_REMOTING
1128 if (delegate->target && mono_object_is_transparent_proxy (delegate->target)) {
1131 if (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class != mono_class_get_com_object_class () &&
1132 !mono_class_is_com_object (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class))
1134 method = mono_marshal_get_remoting_invoke (method);
1138 sig = tramp_info->sig;
1139 if (!(sig && method == tramp_info->method)) {
1141 sig = mono_method_signature_checked (method, &err);
1143 mono_error_set_pending_exception (&err);
1148 if (sig->hasthis && method->klass->valuetype) {
1149 gboolean need_unbox = TRUE;
1151 if (tramp_info->invoke_sig->param_count > sig->param_count && tramp_info->invoke_sig->params [0]->byref)
1156 need_unbox_tramp = TRUE;
1158 method = mono_marshal_get_unbox_wrapper (method);
1162 // If "delegate->method_ptr" is null mono_get_addr_from_ftnptr will fail if
1163 // ftnptrs are being used. "method" would end up null on archtitectures without
1164 // ftnptrs so we can just skip this.
1165 } else if (delegate->method_ptr) {
1166 ji = mono_jit_info_table_find (domain, (char *)mono_get_addr_from_ftnptr (delegate->method_ptr));
1168 method = jinfo_get_method (ji);
1172 sig = tramp_info->sig;
1173 if (!(sig && method == tramp_info->method)) {
1175 sig = mono_method_signature_checked (method, &err);
1177 mono_error_set_pending_exception (&err);
1182 callvirt = !delegate->target && sig->hasthis;
1184 closed_over_null = tramp_info->invoke_sig->param_count == sig->param_count;
1186 if (callvirt && !closed_over_null) {
1188 * The delegate needs to make a virtual call to the target method using its
1189 * first argument as the receiver. This is hard to support in full-aot, so
1190 * optimize it in some cases if possible.
1191 * If the target method is not virtual or is in a sealed class,
1192 * the vcall will call it directly.
1193 * If the call doesn't return a valuetype, then the vcall uses the same calling
1194 * convention as a normal call.
1196 if ((mono_class_is_sealed (method->klass) || !(method->flags & METHOD_ATTRIBUTE_VIRTUAL)) && !MONO_TYPE_ISSTRUCT (sig->ret)) {
1198 enable_caching = FALSE;
1202 if (delegate->target &&
1203 method->flags & METHOD_ATTRIBUTE_VIRTUAL &&
1204 method->flags & METHOD_ATTRIBUTE_ABSTRACT &&
1205 mono_class_is_abstract (method->klass)) {
1206 method = mono_object_get_virtual_method (delegate->target, method);
1207 enable_caching = FALSE;
1210 if (method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
1211 method = mono_marshal_get_synchronized_wrapper (method);
1213 if (method == tramp_info->method)
1214 need_rgctx_tramp = tramp_info->need_rgctx_tramp;
1215 else if (mono_method_needs_static_rgctx_invoke (method, FALSE))
1216 need_rgctx_tramp = TRUE;
1220 * If the called address is a trampoline, replace it with the compiled method so
1221 * further calls don't have to go through the trampoline.
1223 if (method && !callvirt) {
1224 /* Avoid the overhead of looking up an already compiled method if possible */
1225 if (enable_caching && delegate->method_code && *delegate->method_code) {
1226 delegate->method_ptr = *delegate->method_code;
1228 compiled_method = addr = mono_jit_compile_method (method, &error);
1229 if (!mono_error_ok (&error)) {
1230 mono_error_set_pending_exception (&error);
1233 addr = mini_add_method_trampoline (method, compiled_method, need_rgctx_tramp, need_unbox_tramp);
1234 delegate->method_ptr = addr;
1235 if (enable_caching && delegate->method_code)
1236 *delegate->method_code = (guint8 *)delegate->method_ptr;
1239 if (need_rgctx_tramp)
1240 delegate->method_ptr = mono_create_static_rgctx_trampoline (method, delegate->method_ptr);
1243 /* Necessary for !code condition to fallback to slow path */
1246 multicast = ((MonoMulticastDelegate*)delegate)->delegates != NULL;
1247 if (!multicast && !callvirt) {
1248 if (method && (method->flags & METHOD_ATTRIBUTE_STATIC) && mono_method_signature (method)->param_count == mono_method_signature (invoke)->param_count + 1)
1249 /* Closed static delegate */
1252 code = delegate->target ? impl_this : impl_nothis;
1256 /* The general, unoptimized case */
1257 m = mono_marshal_get_delegate_invoke (invoke, delegate);
1258 code = (guint8 *)mono_jit_compile_method (m, &error);
1259 if (!mono_error_ok (&error)) {
1260 mono_error_set_pending_exception (&error);
1263 code = (guint8 *)mini_add_method_trampoline (m, code, mono_method_needs_static_rgctx_invoke (m, FALSE), FALSE);
1266 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
1267 if (enable_caching && !callvirt && tramp_info->method) {
1268 tramp_info->method_ptr = delegate->method_ptr;
1269 tramp_info->invoke_impl = delegate->invoke_impl;
1275 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1277 mono_handler_block_guard_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_info, guint8* tramp)
1279 MONO_REQ_GC_UNSAFE_MODE;
1283 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_tls_get_jit_tls ();
1284 gpointer resume_ip = jit_tls->handler_block_return_address;
1286 memcpy (&ctx, &jit_tls->handler_block_context, sizeof (MonoContext));
1287 MONO_CONTEXT_SET_IP (&ctx, jit_tls->handler_block_return_address);
1289 jit_tls->handler_block_return_address = NULL;
1290 jit_tls->handler_block = NULL;
1292 if (!resume_ip) /*this should not happen, but we should avoid crashing */
1293 exc = mono_get_exception_execution_engine ("Invalid internal state, resuming abort after handler block but no resume ip found");
1295 exc = mono_thread_resume_interruption (TRUE);
1298 mono_handle_exception (&ctx, (MonoObject *)exc);
1299 mono_restore_context (&ctx);
1306 mono_create_handler_block_trampoline (void)
1308 static gpointer code;
1313 if (mono_aot_only) {
1314 gpointer tmp = mono_aot_get_trampoline ("handler_block_trampoline");
1316 mono_memory_barrier ();
1321 mono_trampolines_lock ();
1323 MonoTrampInfo *info;
1326 tmp = mono_arch_create_handler_block_trampoline (&info, FALSE);
1327 mono_tramp_info_register (info, NULL);
1328 mono_memory_barrier ();
1331 mono_trampolines_unlock ();
1338 * mono_get_trampoline_func:
1340 * Return the C function which needs to be called by the generic trampoline of type
1344 mono_get_trampoline_func (MonoTrampolineType tramp_type)
1346 switch (tramp_type) {
1347 case MONO_TRAMPOLINE_JIT:
1348 case MONO_TRAMPOLINE_JUMP:
1349 return mono_magic_trampoline;
1350 case MONO_TRAMPOLINE_RGCTX_LAZY_FETCH:
1351 return mono_rgctx_lazy_fetch_trampoline;
1352 #ifdef MONO_ARCH_AOT_SUPPORTED
1353 case MONO_TRAMPOLINE_AOT:
1354 return mono_aot_trampoline;
1355 case MONO_TRAMPOLINE_AOT_PLT:
1356 return mono_aot_plt_trampoline;
1358 case MONO_TRAMPOLINE_DELEGATE:
1359 return mono_delegate_trampoline;
1360 case MONO_TRAMPOLINE_RESTORE_STACK_PROT:
1361 return mono_altstack_restore_prot;
1362 #ifndef DISABLE_REMOTING
1363 case MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING:
1364 return mono_generic_virtual_remoting_trampoline;
1366 case MONO_TRAMPOLINE_VCALL:
1367 return mono_vcall_trampoline;
1368 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1369 case MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD:
1370 return mono_handler_block_guard_trampoline;
1373 g_assert_not_reached ();
1379 create_trampoline_code (MonoTrampolineType tramp_type)
1381 MonoTrampInfo *info;
1384 code = mono_arch_create_generic_trampoline (tramp_type, &info, FALSE);
1385 mono_tramp_info_register (info, NULL);
1391 mono_trampolines_init (void)
1393 mono_os_mutex_init_recursive (&trampolines_mutex);
1398 mono_trampoline_code [MONO_TRAMPOLINE_JIT] = create_trampoline_code (MONO_TRAMPOLINE_JIT);
1399 mono_trampoline_code [MONO_TRAMPOLINE_JUMP] = create_trampoline_code (MONO_TRAMPOLINE_JUMP);
1400 mono_trampoline_code [MONO_TRAMPOLINE_RGCTX_LAZY_FETCH] = create_trampoline_code (MONO_TRAMPOLINE_RGCTX_LAZY_FETCH);
1401 #ifdef MONO_ARCH_AOT_SUPPORTED
1402 mono_trampoline_code [MONO_TRAMPOLINE_AOT] = create_trampoline_code (MONO_TRAMPOLINE_AOT);
1403 mono_trampoline_code [MONO_TRAMPOLINE_AOT_PLT] = create_trampoline_code (MONO_TRAMPOLINE_AOT_PLT);
1405 mono_trampoline_code [MONO_TRAMPOLINE_DELEGATE] = create_trampoline_code (MONO_TRAMPOLINE_DELEGATE);
1406 mono_trampoline_code [MONO_TRAMPOLINE_RESTORE_STACK_PROT] = create_trampoline_code (MONO_TRAMPOLINE_RESTORE_STACK_PROT);
1407 #ifndef DISABLE_REMOTING
1408 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING);
1410 mono_trampoline_code [MONO_TRAMPOLINE_VCALL] = create_trampoline_code (MONO_TRAMPOLINE_VCALL);
1411 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1412 mono_trampoline_code [MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD] = create_trampoline_code (MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD);
1413 mono_create_handler_block_trampoline ();
1416 mono_counters_register ("Calls to trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &trampoline_calls);
1417 mono_counters_register ("JIT trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &jit_trampolines);
1418 mono_counters_register ("Unbox trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &unbox_trampolines);
1419 mono_counters_register ("Static rgctx trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &static_rgctx_trampolines);
1423 mono_trampolines_cleanup (void)
1425 if (rgctx_lazy_fetch_trampoline_hash)
1426 g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash);
1427 if (rgctx_lazy_fetch_trampoline_hash_addr)
1428 g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash_addr);
1430 mono_os_mutex_destroy (&trampolines_mutex);
1434 mono_get_trampoline_code (MonoTrampolineType tramp_type)
1436 g_assert (mono_trampoline_code [tramp_type]);
1438 return mono_trampoline_code [tramp_type];
1442 mono_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
1448 code = mono_aot_create_specific_trampoline (mono_defaults.corlib, arg1, tramp_type, domain, &len);
1450 code = mono_arch_create_specific_trampoline (arg1, tramp_type, domain, &len);
1451 mono_lldb_save_specific_trampoline_info (arg1, tramp_type, domain, code, len);
1458 mono_create_jump_trampoline (MonoDomain *domain, MonoMethod *method, gboolean add_sync_wrapper, MonoError *error)
1462 guint32 code_size = 0;
1466 #ifdef ENABLE_INTERPRETER
1467 if (mono_use_interpreter) {
1468 gpointer ret = mono_interp_create_trampoline (domain, method, error);
1469 if (!mono_error_ok (error))
1475 code = mono_jit_find_compiled_method_with_jit_info (domain, method, &ji);
1477 * We cannot recover the correct type of a shared generic
1478 * method from its native code address, so we use the
1479 * trampoline instead.
1480 * For synchronized methods, the trampoline adds the wrapper.
1482 if (code && !ji->has_generic_jit_info && !(method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED))
1485 if (mono_llvm_only) {
1486 code = mono_jit_compile_method (method, error);
1487 if (!mono_error_ok (error))
1492 mono_domain_lock (domain);
1493 code = g_hash_table_lookup (domain_jit_info (domain)->jump_trampoline_hash, method);
1494 mono_domain_unlock (domain);
1498 code = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JUMP, mono_domain_get (), &code_size);
1499 g_assert (code_size);
1501 ji = (MonoJitInfo *)mono_domain_alloc0 (domain, MONO_SIZEOF_JIT_INFO);
1502 ji->code_start = code;
1503 ji->code_size = code_size;
1504 ji->d.method = method;
1507 * mono_delegate_ctor needs to find the method metadata from the
1508 * trampoline address, so we save it here.
1511 mono_jit_info_table_add (domain, ji);
1513 mono_domain_lock (domain);
1514 g_hash_table_insert (domain_jit_info (domain)->jump_trampoline_hash, method, ji->code_start);
1515 mono_domain_unlock (domain);
1517 return ji->code_start;
1521 method_not_found (void)
1523 g_assert_not_reached ();
1527 mono_create_jit_trampoline (MonoDomain *domain, MonoMethod *method, MonoError *error)
1533 if (mono_aot_only) {
1534 if (mono_llvm_only && method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
1535 method = mono_marshal_get_synchronized_wrapper (method);
1537 /* Avoid creating trampolines if possible */
1538 gpointer code = mono_jit_find_compiled_method (domain, method);
1542 if (mono_llvm_only) {
1543 if (method->wrapper_type == MONO_WRAPPER_PROXY_ISINST)
1544 /* These wrappers are not generated */
1545 return method_not_found;
1546 /* Methods are lazily initialized on first call, so this can't lead recursion */
1547 code = mono_jit_compile_method (method, error);
1548 if (!mono_error_ok (error))
1554 mono_domain_lock (domain);
1555 tramp = g_hash_table_lookup (domain_jit_info (domain)->jit_trampoline_hash, method);
1556 mono_domain_unlock (domain);
1560 tramp = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JIT, domain, NULL);
1562 mono_domain_lock (domain);
1563 g_hash_table_insert (domain_jit_info (domain)->jit_trampoline_hash, method, tramp);
1564 mono_domain_unlock (domain);
1572 mono_create_jit_trampoline_from_token (MonoImage *image, guint32 token)
1576 MonoDomain *domain = mono_domain_get ();
1577 guint8 *buf, *start;
1579 buf = start = (guint8 *)mono_domain_alloc0 (domain, 2 * sizeof (gpointer));
1581 *(gpointer*)(gpointer)buf = image;
1582 buf += sizeof (gpointer);
1583 *(guint32*)(gpointer)buf = token;
1585 tramp = mono_create_specific_trampoline (start, MONO_TRAMPOLINE_AOT, domain, NULL);
1594 * mono_create_delegate_trampoline_info:
1596 * Create a trampoline info structure for the KLASS+METHOD pair.
1598 MonoDelegateTrampInfo*
1599 mono_create_delegate_trampoline_info (MonoDomain *domain, MonoClass *klass, MonoMethod *method)
1603 MonoDelegateTrampInfo *tramp_info;
1604 MonoClassMethodPair pair, *dpair;
1605 guint32 code_size = 0;
1608 pair.method = method;
1609 mono_domain_lock (domain);
1610 tramp_info = (MonoDelegateTrampInfo *)g_hash_table_lookup (domain_jit_info (domain)->delegate_trampoline_hash, &pair);
1611 mono_domain_unlock (domain);
1615 invoke = mono_get_delegate_invoke (klass);
1618 tramp_info = (MonoDelegateTrampInfo *)mono_domain_alloc0 (domain, sizeof (MonoDelegateTrampInfo));
1619 tramp_info->invoke = invoke;
1620 tramp_info->invoke_sig = mono_method_signature (invoke);
1621 tramp_info->impl_this = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), TRUE);
1622 tramp_info->impl_nothis = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), FALSE);
1623 tramp_info->method = method;
1625 error_init (&error);
1626 tramp_info->sig = mono_method_signature_checked (method, &error);
1627 tramp_info->need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (method, FALSE);
1629 tramp_info->invoke_impl = mono_create_specific_trampoline (tramp_info, MONO_TRAMPOLINE_DELEGATE, domain, &code_size);
1630 g_assert (code_size);
1632 dpair = (MonoClassMethodPair *)mono_domain_alloc0 (domain, sizeof (MonoClassMethodPair));
1633 memcpy (dpair, &pair, sizeof (MonoClassMethodPair));
1635 /* store trampoline address */
1636 mono_domain_lock (domain);
1637 g_hash_table_insert (domain_jit_info (domain)->delegate_trampoline_hash, dpair, tramp_info);
1638 mono_domain_unlock (domain);
1644 no_delegate_trampoline (void)
1646 g_assert_not_reached ();
1650 mono_create_delegate_trampoline (MonoDomain *domain, MonoClass *klass)
1652 if (mono_llvm_only || mono_use_interpreter)
1653 return no_delegate_trampoline;
1655 return mono_create_delegate_trampoline_info (domain, klass, NULL)->invoke_impl;
1659 mono_create_delegate_virtual_trampoline (MonoDomain *domain, MonoClass *klass, MonoMethod *method)
1661 MonoMethod *invoke = mono_get_delegate_invoke (klass);
1664 return mono_get_delegate_virtual_invoke_impl (mono_method_signature (invoke), method);
1668 mono_create_rgctx_lazy_fetch_trampoline (guint32 offset)
1670 static gboolean inited = FALSE;
1671 static int num_trampolines = 0;
1672 MonoTrampInfo *info;
1674 gpointer tramp, ptr;
1676 mono_trampolines_lock ();
1677 if (rgctx_lazy_fetch_trampoline_hash)
1678 tramp = g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset));
1681 mono_trampolines_unlock ();
1685 if (mono_aot_only) {
1686 ptr = mono_aot_get_lazy_fetch_trampoline (offset);
1688 tramp = mono_arch_create_rgctx_lazy_fetch_trampoline (offset, &info, FALSE);
1689 mono_tramp_info_register (info, NULL);
1690 ptr = mono_create_ftnptr (mono_get_root_domain (), tramp);
1693 mono_trampolines_lock ();
1694 if (!rgctx_lazy_fetch_trampoline_hash) {
1695 rgctx_lazy_fetch_trampoline_hash = g_hash_table_new (NULL, NULL);
1696 rgctx_lazy_fetch_trampoline_hash_addr = g_hash_table_new (NULL, NULL);
1698 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset), ptr);
1699 g_assert (offset != -1);
1700 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash_addr, ptr, GUINT_TO_POINTER (offset + 1));
1701 mono_trampolines_unlock ();
1704 mono_counters_register ("RGCTX num lazy fetch trampolines",
1705 MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_trampolines);
1714 mono_find_rgctx_lazy_fetch_trampoline_by_addr (gconstpointer addr)
1718 mono_trampolines_lock ();
1719 if (rgctx_lazy_fetch_trampoline_hash_addr) {
1720 /* We store the real offset + 1 so we can detect when the lookup fails */
1721 offset = GPOINTER_TO_INT (g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash_addr, addr));
1729 mono_trampolines_unlock ();
1733 static const char*tramp_names [MONO_TRAMPOLINE_NUM] = {
1740 "restore_stack_prot",
1741 "generic_virtual_remoting",
1743 "handler_block_guard"
1747 * mono_get_generic_trampoline_simple_name:
1751 mono_get_generic_trampoline_simple_name (MonoTrampolineType tramp_type)
1753 return tramp_names [tramp_type];
1757 * mono_get_generic_trampoline_name:
1759 * Returns a pointer to malloc-ed memory.
1762 mono_get_generic_trampoline_name (MonoTrampolineType tramp_type)
1764 return g_strdup_printf ("generic_trampoline_%s", tramp_names [tramp_type]);
1768 * mono_get_rgctx_fetch_trampoline_name:
1770 * Returns a pointer to malloc-ed memory.
1773 mono_get_rgctx_fetch_trampoline_name (int slot)
1778 mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
1779 index = MONO_RGCTX_SLOT_INDEX (slot);
1781 return g_strdup_printf ("rgctx_fetch_trampoline_%s_%d", mrgctx ? "mrgctx" : "rgctx", index);
1785 * mini_get_single_step_trampoline:
1787 * Return a trampoline which calls debugger_agent_single_step_from_context ().
1790 mini_get_single_step_trampoline (void)
1792 static gpointer trampoline;
1797 if (mono_aot_only) {
1798 tramp = mono_aot_get_trampoline ("sdb_single_step_trampoline");
1800 #ifdef MONO_ARCH_HAVE_SDB_TRAMPOLINES
1801 MonoTrampInfo *info;
1802 tramp = mono_arch_create_sdb_trampoline (TRUE, &info, FALSE);
1803 mono_tramp_info_register (info, NULL);
1806 g_assert_not_reached ();
1809 mono_memory_barrier ();
1817 * mini_get_breakpoint_trampoline:
1819 * Return a trampoline which calls debugger_agent_breakpoint_from_context ().
1822 mini_get_breakpoint_trampoline (void)
1824 static gpointer trampoline;
1829 if (mono_aot_only) {
1830 tramp = mono_aot_get_trampoline ("sdb_breakpoint_trampoline");
1832 #ifdef MONO_ARCH_HAVE_SDB_TRAMPOLINES
1833 MonoTrampInfo *info;
1834 tramp = mono_arch_create_sdb_trampoline (FALSE, &info, FALSE);
1835 mono_tramp_info_register (info, NULL);
1838 g_assert_not_reached ();
1841 mono_memory_barrier ();