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>
22 * Address of the trampoline code. This is used by the debugger to check
23 * whether a method is a trampoline.
25 guint8* mono_trampoline_code [MONO_TRAMPOLINE_NUM];
27 static GHashTable *rgctx_lazy_fetch_trampoline_hash;
28 static GHashTable *rgctx_lazy_fetch_trampoline_hash_addr;
29 static guint32 trampoline_calls, jit_trampolines, unbox_trampolines, static_rgctx_trampolines;
31 #define mono_trampolines_lock() mono_os_mutex_lock (&trampolines_mutex)
32 #define mono_trampolines_unlock() mono_os_mutex_unlock (&trampolines_mutex)
33 static mono_mutex_t trampolines_mutex;
35 #ifdef MONO_ARCH_GSHARED_SUPPORTED
43 rgctx_tramp_info_equal (gconstpointer ka, gconstpointer kb)
45 const RgctxTrampInfo *i1 = (const RgctxTrampInfo *)ka;
46 const RgctxTrampInfo *i2 = (const RgctxTrampInfo *)kb;
48 if (i1->m == i2->m && i1->addr == i2->addr)
55 rgctx_tramp_info_hash (gconstpointer data)
57 const RgctxTrampInfo *info = (const RgctxTrampInfo *)data;
59 return GPOINTER_TO_UINT (info->m) ^ GPOINTER_TO_UINT (info->addr);
63 * mono_create_static_rgctx_trampoline:
64 * @m: the mono method to create a trampoline for
65 * @addr: the address to jump to (where the compiled code for M lives)
67 * Creates a static rgctx trampoline for M which branches to ADDR which should
68 * point to the compiled code of M.
70 * Static rgctx trampolines are used when a shared generic method which doesn't
71 * have a this argument is called indirectly, ie. from code which can't pass in
72 * the rgctx argument. The trampoline sets the rgctx argument and jumps to the
73 * methods code. These trampolines are similar to the unbox trampolines, they
74 * perform the same task as the static rgctx wrappers, but they are smaller/faster,
75 * and can be made to work with full AOT.
77 * On PPC addr should be an ftnptr and the return value is an ftnptr too.
79 * Returns the generated static rgctx trampoline.
82 mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr)
87 RgctxTrampInfo tmp_info;
90 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
91 g_assert (((gpointer*)addr) [2] == 0);
94 ctx = mini_method_get_rgctx (m);
96 domain = mono_domain_get ();
99 * In the AOT case, addr might point to either the method, or to an unbox trampoline,
100 * so make the hash keyed on the m+addr pair.
102 mono_domain_lock (domain);
103 if (!domain_jit_info (domain)->static_rgctx_trampoline_hash)
104 domain_jit_info (domain)->static_rgctx_trampoline_hash = g_hash_table_new (rgctx_tramp_info_hash, rgctx_tramp_info_equal);
106 tmp_info.addr = addr;
107 res = g_hash_table_lookup (domain_jit_info (domain)->static_rgctx_trampoline_hash,
109 mono_domain_unlock (domain);
114 res = mono_aot_get_static_rgctx_trampoline (ctx, addr);
116 res = mono_arch_get_static_rgctx_trampoline (m, (MonoMethodRuntimeGenericContext *)ctx, addr);
118 mono_domain_lock (domain);
119 /* Duplicates inserted while we didn't hold the lock are OK */
120 info = (RgctxTrampInfo *)mono_domain_alloc (domain, sizeof (RgctxTrampInfo));
123 g_hash_table_insert (domain_jit_info (domain)->static_rgctx_trampoline_hash, info, res);
124 mono_domain_unlock (domain);
126 static_rgctx_trampolines ++;
132 mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr)
135 * This shouldn't happen as all arches which support generic sharing support
136 * static rgctx trampolines as well.
138 g_assert_not_reached ();
143 #define DEBUG_IMT(stmt) do { stmt; } while (0)
145 #define DEBUG_IMT(stmt) do { } while (0)
149 * mini_resolve_imt_method:
151 * Resolve the actual method called when making an IMT call through VTABLE_SLOT with IMT_METHOD as the interface method.
153 * Either IMPL_METHOD or OUT_AOT_ADDR will be set on return.
156 mini_resolve_imt_method (MonoVTable *vt, gpointer *vtable_slot, MonoMethod *imt_method, MonoMethod **impl_method, gpointer *out_aot_addr, gboolean *out_need_rgctx_tramp, MonoMethod **variant_iface)
158 MonoMethod *impl = NULL, *generic_virtual = NULL;
159 gboolean lookup_aot, variance_used = FALSE, need_rgctx_tramp = FALSE;
161 guint8 *aot_addr = NULL;
162 int displacement = vtable_slot - ((gpointer*)vt);
163 int interface_offset;
164 int imt_slot = MONO_IMT_SIZE + displacement;
166 g_assert (imt_slot < MONO_IMT_SIZE);
168 /* This has to be variance aware since imt_method can be from an interface that vt->klass doesn't directly implement */
169 interface_offset = mono_class_interface_offset_with_variance (vt->klass, imt_method->klass, &variance_used);
170 if (interface_offset < 0)
171 g_error ("%s doesn't implement interface %s\n", mono_type_get_name_full (&vt->klass->byval_arg, MONO_TYPE_NAME_FORMAT_IL), mono_type_get_name_full (&imt_method->klass->byval_arg, MONO_TYPE_NAME_FORMAT_IL));
173 *variant_iface = NULL;
174 if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) {
175 /* Generic virtual method */
176 generic_virtual = imt_method;
177 need_rgctx_tramp = TRUE;
178 } else if (variance_used && mono_class_has_variant_generic_params (imt_method->klass)) {
179 *variant_iface = imt_method;
183 /* We can only use the AOT compiled code if we don't require further processing */
184 lookup_aot = !generic_virtual & !variant_iface;
187 mono_vtable_build_imt_slot (vt, mono_method_get_imt_slot (imt_method));
189 if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) {
191 MonoGenericContext context = { NULL, NULL };
194 * Generic virtual method, imt_method contains the inflated interface
195 * method, need to get the inflated impl method.
197 /* imt_method->slot might not be set */
198 impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_declaring_generic_method (imt_method)->slot);
200 if (impl->klass->generic_class)
201 context.class_inst = impl->klass->generic_class->context.class_inst;
202 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
203 impl = mono_class_inflate_generic_method_checked (impl, &context, &error);
204 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */
207 /* Avoid loading metadata or creating a generic vtable if possible */
208 if (lookup_aot && !vt->klass->valuetype) {
209 aot_addr = (guint8 *)mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, interface_offset + mono_method_get_vtable_slot (imt_method), &error);
210 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */
217 impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_vtable_slot (imt_method));
220 if (impl && mono_method_needs_static_rgctx_invoke (impl, FALSE))
221 need_rgctx_tramp = TRUE;
222 if (impl && impl->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED) {
223 WrapperInfo *info = mono_marshal_get_wrapper_info (impl);
225 if (info && info->subtype == WRAPPER_SUBTYPE_GENERIC_ARRAY_HELPER)
226 need_rgctx_tramp = TRUE;
229 *out_need_rgctx_tramp = need_rgctx_tramp;
230 *out_aot_addr = aot_addr;
232 DEBUG_IMT (printf ("mono_convert_imt_slot_to_vtable_slot: method = %s.%s.%s, imt_method = %s.%s.%s\n",
233 method->klass->name_space, method->klass->name, method->name,
234 imt_method->klass->name_space, imt_method->klass->name, imt_method->name));
236 if (vt->imt_collisions_bitmap & (1 << imt_slot)) {
237 int slot = mono_method_get_vtable_index (imt_method);
240 g_assert (slot != -1);
241 vtable_offset = interface_offset + slot;
242 vtable_slot = & (vt->vtable [vtable_offset]);
243 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));
246 DEBUG_IMT (printf ("mono_convert_imt_slot_to_vtable_slot: slot %p[%d] is in the IMT, but not colliding\n", slot, imt_slot));
252 * This is a super-ugly hack to fix bug #616463.
254 * The problem is that we don't always set is_generic for generic
255 * method definitions. See the comment at the end of
256 * mono_class_inflate_generic_method_full_checked() in class.c.
259 is_generic_method_definition (MonoMethod *m)
261 MonoGenericContext *context;
267 context = mono_method_get_context (m);
268 if (!context->method_inst)
270 if (context->method_inst == mono_method_get_generic_container (((MonoMethodInflated*)m)->declaring)->context.method_inst)
276 mini_jit_info_is_gsharedvt (MonoJitInfo *ji)
278 if (ji && ji->has_generic_jit_info && (mono_jit_info_get_generic_sharing_context (ji)->is_gsharedvt))
285 * mini_add_method_trampoline:
288 * @add_static_rgctx_tramp: adds a static rgctx trampoline
289 * @add_unbox_tramp: adds an unboxing trampoline
291 * Add static rgctx/gsharedvt_in/unbox trampolines to
292 * M/COMPILED_METHOD if needed.
294 * Returns the trampoline address, or COMPILED_METHOD if no trampoline
298 mini_add_method_trampoline (MonoMethod *m, gpointer compiled_method, gboolean add_static_rgctx_tramp, gboolean add_unbox_tramp)
300 gpointer addr = compiled_method;
301 gboolean callee_gsharedvt, callee_array_helper;
302 MonoMethod *jmethod = NULL;
305 // FIXME: This loads information from AOT (perf problem)
306 ji = mini_jit_info_table_find (mono_domain_get (), (char *)mono_get_addr_from_ftnptr (compiled_method), NULL);
307 callee_gsharedvt = mini_jit_info_is_gsharedvt (ji);
309 callee_array_helper = FALSE;
310 if (m->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED) {
311 WrapperInfo *info = mono_marshal_get_wrapper_info (m);
314 * generic array helpers.
315 * Have to replace the wrappers with the original generic instances.
317 if (info && info->subtype == WRAPPER_SUBTYPE_GENERIC_ARRAY_HELPER) {
318 callee_array_helper = TRUE;
319 m = info->d.generic_array_helper.method;
321 } else if (m->wrapper_type == MONO_WRAPPER_UNKNOWN) {
322 WrapperInfo *info = mono_marshal_get_wrapper_info (m);
324 /* Same for synchronized inner wrappers */
325 if (info && info->subtype == WRAPPER_SUBTYPE_SYNCHRONIZED_INNER) {
326 m = info->d.synchronized_inner.method;
330 if (callee_gsharedvt)
331 g_assert (m->is_inflated);
333 addr = compiled_method;
335 if (add_unbox_tramp) {
337 * The unbox trampolines call the method directly, so need to add
338 * an rgctx tramp before them.
341 addr = mono_aot_get_unbox_trampoline (m);
343 unbox_trampolines ++;
344 addr = mono_arch_get_unbox_trampoline (m, addr);
348 if (ji && !ji->is_trampoline)
349 jmethod = jinfo_get_method (ji);
350 if (callee_gsharedvt && mini_is_gsharedvt_variable_signature (mono_method_signature (jmethod))) {
351 MonoMethodSignature *sig, *gsig;
353 /* Here m is a generic instance, while ji->method is the gsharedvt method implementing it */
355 /* Call from normal/gshared code to gsharedvt code with variable signature */
356 sig = mono_method_signature (m);
357 gsig = mono_method_signature (jmethod);
359 addr = mini_get_gsharedvt_wrapper (TRUE, addr, sig, gsig, -1, FALSE);
362 g_assert_not_reached ();
363 //printf ("IN: %s\n", mono_method_full_name (m, TRUE));
366 if (callee_array_helper) {
367 add_static_rgctx_tramp = FALSE;
368 /* FIXME: ji->from_aot is not set for llvm methods */
369 if (ji && (ji->from_aot || mono_aot_only)) {
370 /* In AOT mode, compiled_method points to one of the InternalArray methods in Array. */
371 if (!mono_llvm_only && mono_method_needs_static_rgctx_invoke (jinfo_get_method (ji), TRUE))
372 add_static_rgctx_tramp = TRUE;
377 add_static_rgctx_tramp = FALSE;
379 if (add_static_rgctx_tramp)
380 addr = mono_create_static_rgctx_trampoline (m, addr);
386 * mini_create_llvmonly_ftndesc:
388 * Create a function descriptor of the form <addr, arg>, which
389 * represents a callee ADDR with ARG as the last argument.
391 * - generic sharing (ARG is the rgctx)
392 * - gsharedvt signature wrappers (ARG is a function descriptor)
395 mini_create_llvmonly_ftndesc (MonoDomain *domain, gpointer addr, gpointer arg)
397 MonoFtnDesc *ftndesc = (MonoFtnDesc*)mono_domain_alloc0 (mono_domain_get (), 2 * sizeof (gpointer));
398 ftndesc->addr = addr;
405 * mini_add_method_wrappers_llvmonly:
407 * Add unbox/gsharedvt wrappers around COMPILED_METHOD if needed. Return the wrapper address or COMPILED_METHOD
408 * if no wrapper is needed. Set OUT_ARG to the rgctx/extra argument needed to be passed to the returned method.
411 mini_add_method_wrappers_llvmonly (MonoMethod *m, gpointer compiled_method, gboolean caller_gsharedvt, gboolean add_unbox_tramp, gpointer *out_arg)
414 gboolean callee_gsharedvt, callee_array_helper;
415 MonoMethod *jmethod = NULL;
418 // FIXME: This loads information from AOT (perf problem)
419 ji = mini_jit_info_table_find (mono_domain_get (), (char *)mono_get_addr_from_ftnptr (compiled_method), NULL);
420 callee_gsharedvt = mini_jit_info_is_gsharedvt (ji);
422 callee_array_helper = FALSE;
423 if (m->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED) {
424 WrapperInfo *info = mono_marshal_get_wrapper_info (m);
427 * generic array helpers.
428 * Have to replace the wrappers with the original generic instances.
430 if (info && info->subtype == WRAPPER_SUBTYPE_GENERIC_ARRAY_HELPER) {
431 callee_array_helper = TRUE;
432 m = info->d.generic_array_helper.method;
434 } else if (m->wrapper_type == MONO_WRAPPER_UNKNOWN) {
435 WrapperInfo *info = mono_marshal_get_wrapper_info (m);
437 /* Same for synchronized inner wrappers */
438 if (info && info->subtype == WRAPPER_SUBTYPE_SYNCHRONIZED_INNER) {
439 m = info->d.synchronized_inner.method;
443 if (callee_gsharedvt)
444 g_assert (m->is_inflated);
446 addr = compiled_method;
448 if (add_unbox_tramp) {
450 * The unbox trampolines call the method directly, so need to add
451 * an rgctx tramp before them.
454 addr = mono_aot_get_unbox_trampoline (m);
456 unbox_trampolines ++;
457 addr = mono_arch_get_unbox_trampoline (m, addr);
461 g_assert (mono_llvm_only);
464 if (ji && !ji->is_trampoline)
465 jmethod = jinfo_get_method (ji);
467 if (callee_gsharedvt)
468 callee_gsharedvt = mini_is_gsharedvt_variable_signature (mono_method_signature (jmethod));
470 if (!caller_gsharedvt && callee_gsharedvt) {
471 MonoMethodSignature *sig, *gsig;
472 gpointer wrapper_addr;
474 /* Here m is a generic instance, while ji->method is the gsharedvt method implementing it */
476 /* Call from normal/gshared code to gsharedvt code with variable signature */
477 sig = mono_method_signature (m);
478 gsig = mono_method_signature (jmethod);
480 wrapper_addr = mini_get_gsharedvt_wrapper (TRUE, addr, sig, gsig, -1, FALSE);
483 * This is a gsharedvt in wrapper, it gets passed a ftndesc for the gsharedvt method as an argument.
485 *out_arg = mini_create_llvmonly_ftndesc (mono_domain_get (), addr, mini_method_get_rgctx (m));
487 //printf ("IN: %s\n", mono_method_full_name (m, TRUE));
490 if (!(*out_arg) && mono_method_needs_static_rgctx_invoke (m, FALSE))
491 *out_arg = mini_method_get_rgctx (m);
493 if (caller_gsharedvt && !callee_gsharedvt) {
495 * The callee uses the gsharedvt calling convention, have to add an out wrapper.
497 gpointer out_wrapper = mini_get_gsharedvt_wrapper (FALSE, NULL, mono_method_signature (m), NULL, -1, FALSE);
498 MonoFtnDesc *out_wrapper_arg = mini_create_llvmonly_ftndesc (mono_domain_get (), addr, *out_arg);
501 *out_arg = out_wrapper_arg;
508 * common_call_trampoline:
510 * The code to handle normal, virtual, and interface method calls and jumps, both
511 * from JITted and LLVM compiled code.
514 common_call_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, MonoVTable *vt, gpointer *vtable_slot, MonoError *error)
516 gpointer addr, compiled_method;
517 gboolean generic_shared = FALSE;
518 gboolean need_unbox_tramp = FALSE;
519 gboolean need_rgctx_tramp = FALSE;
520 MonoMethod *declaring = NULL;
521 MonoMethod *generic_virtual = NULL, *variant_iface = NULL;
523 gboolean imt_call, virtual_;
524 gpointer *orig_vtable_slot, *vtable_slot_to_patch = NULL;
525 MonoJitInfo *ji = NULL;
527 mono_error_init (error);
529 virtual_ = vt && (gpointer)vtable_slot > (gpointer)vt;
530 imt_call = vt && (gpointer)vtable_slot < (gpointer)vt;
533 * rgctx trampolines are needed when the call is indirect so the caller can't pass
534 * the rgctx argument needed by the callee.
537 need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (m, FALSE);
539 orig_vtable_slot = vtable_slot;
540 vtable_slot_to_patch = vtable_slot;
544 MonoMethod *imt_method = NULL, *impl_method = NULL;
545 MonoObject *this_arg;
547 g_assert (vtable_slot);
549 imt_method = mono_arch_find_imt_method (regs, code);
550 this_arg = (MonoObject *)mono_arch_get_this_arg_from_call (regs, code);
552 if (mono_object_is_transparent_proxy (this_arg)) {
553 /* Use the slow path for now */
554 m = mono_object_get_virtual_method (this_arg, imt_method);
555 vtable_slot_to_patch = NULL;
557 if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) {
558 /* Generic virtual method */
559 generic_virtual = imt_method;
560 need_rgctx_tramp = TRUE;
563 vtable_slot = mini_resolve_imt_method (vt, vtable_slot, imt_method, &impl_method, &addr, &need_rgctx_tramp, &variant_iface);
564 /* This is the vcall slot which gets called through the IMT thunk */
565 vtable_slot_to_patch = vtable_slot;
569 * We found AOT compiled code for the method, skip the rest.
571 if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
574 return mono_create_ftnptr (mono_domain_get (), addr);
582 * The virtual check is needed because is_generic_method_definition (m) could
583 * return TRUE for methods used in IMT calls too.
585 if (virtual_ && is_generic_method_definition (m)) {
587 MonoGenericContext context = { NULL, NULL };
588 MonoMethod *declaring;
591 declaring = mono_method_get_declaring_generic_method (m);
595 if (m->klass->generic_class)
596 context.class_inst = m->klass->generic_class->context.class_inst;
598 g_assert (!m->klass->generic_container);
600 generic_virtual = mono_arch_find_imt_method (regs, code);
601 g_assert (generic_virtual);
602 g_assert (generic_virtual->is_inflated);
603 context.method_inst = ((MonoMethodInflated*)generic_virtual)->context.method_inst;
605 m = mono_class_inflate_generic_method_checked (declaring, &context, &error);
606 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */
607 /* FIXME: only do this if the method is sharable */
608 need_rgctx_tramp = TRUE;
609 } else if ((context_used = mono_method_check_context_used (m))) {
610 MonoClass *klass = NULL;
611 MonoMethod *actual_method = NULL;
612 MonoVTable *vt = NULL;
613 MonoGenericInst *method_inst = NULL;
616 generic_shared = TRUE;
621 * The caller is gshared code, compute the actual method to call from M and this/rgctx.
623 if (m->is_inflated && mono_method_get_context (m)->method_inst) {
624 MonoMethodRuntimeGenericContext *mrgctx = (MonoMethodRuntimeGenericContext*)mono_arch_find_static_call_vtable (regs, code);
626 klass = mrgctx->class_vtable->klass;
627 method_inst = mrgctx->method_inst;
628 } else if ((m->flags & METHOD_ATTRIBUTE_STATIC) || m->klass->valuetype) {
629 MonoVTable *vtable = mono_arch_find_static_call_vtable (regs, code);
631 klass = vtable->klass;
633 MonoObject *this_argument = (MonoObject *)mono_arch_get_this_arg_from_call (regs, code);
635 vt = this_argument->vtable;
636 vtable_slot = orig_vtable_slot;
638 g_assert (this_argument->vtable->klass->inited);
641 mono_class_setup_supertypes (this_argument->vtable->klass);
642 klass = this_argument->vtable->klass->supertypes [m->klass->idepth - 1];
646 g_assert (vtable_slot || klass);
649 int displacement = vtable_slot - ((gpointer*)vt);
651 g_assert_not_reached ();
653 g_assert (displacement > 0);
655 actual_method = vt->klass->vtable [displacement];
658 if (method_inst || m->wrapper_type) {
660 MonoGenericContext context = { NULL, NULL };
663 declaring = mono_method_get_declaring_generic_method (m);
667 if (klass->generic_class)
668 context.class_inst = klass->generic_class->context.class_inst;
669 else if (klass->generic_container)
670 context.class_inst = klass->generic_container->context.class_inst;
671 context.method_inst = method_inst;
673 actual_method = mono_class_inflate_generic_method_checked (declaring, &context, &error);
674 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */
676 actual_method = mono_class_get_method_generic (klass, m);
680 g_assert (actual_method);
681 g_assert (actual_method->klass == klass);
683 if (actual_method->is_inflated)
684 declaring = mono_method_get_declaring_generic_method (actual_method);
691 if (m->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) {
692 m = mono_marshal_get_synchronized_wrapper (m);
693 need_rgctx_tramp = FALSE;
696 /* Calls made through delegates on platforms without delegate trampolines */
697 if (!code && mono_method_needs_static_rgctx_invoke (m, FALSE))
698 need_rgctx_tramp = TRUE;
700 addr = compiled_method = mono_jit_compile_method (m, error);
704 if (generic_virtual || variant_iface) {
705 if (vt->klass->valuetype) /*FIXME is this required variant iface?*/
706 need_unbox_tramp = TRUE;
707 } else if (orig_vtable_slot) {
708 if (m->klass->valuetype)
709 need_unbox_tramp = TRUE;
712 addr = mini_add_method_trampoline (m, compiled_method, need_rgctx_tramp, need_unbox_tramp);
714 if (generic_virtual || variant_iface) {
715 MonoMethod *target = generic_virtual ? generic_virtual : variant_iface;
717 vtable_slot = orig_vtable_slot;
718 g_assert (vtable_slot);
720 mono_method_add_generic_virtual_invocation (mono_domain_get (),
727 /* the method was jumped to */
729 MonoDomain *domain = mono_domain_get ();
731 /* Patch the got entries pointing to this method */
733 * We do this here instead of in mono_codegen () to cover the case when m
734 * was loaded from an aot image.
736 if (domain_jit_info (domain)->jump_target_got_slot_hash) {
739 mono_domain_lock (domain);
740 list = (GSList *)g_hash_table_lookup (domain_jit_info (domain)->jump_target_got_slot_hash, m);
742 for (tmp = list; tmp; tmp = tmp->next) {
743 gpointer *got_slot = (gpointer *)tmp->data;
746 g_hash_table_remove (domain_jit_info (domain)->jump_target_got_slot_hash, m);
749 mono_domain_unlock (domain);
755 vtable_slot = orig_vtable_slot;
758 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))) {
759 g_assert (*vtable_slot_to_patch);
760 *vtable_slot_to_patch = mono_get_addr_from_ftnptr (addr);
763 guint8 *plt_entry = mono_aot_get_plt_entry (code);
764 gboolean no_patch = FALSE;
765 MonoJitInfo *target_ji;
768 if (generic_shared) {
770 mini_jit_info_table_find (mono_domain_get (), (char *)mono_get_addr_from_ftnptr (compiled_method), NULL);
772 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
774 if (ji && target_ji && generic_shared && ji->has_generic_jit_info && !target_ji->has_generic_jit_info) {
779 mono_aot_patch_plt_entry (code, plt_entry, NULL, regs, (guint8 *)addr);
781 if (generic_shared) {
782 if (m->wrapper_type != MONO_WRAPPER_NONE)
783 m = mono_marshal_method_from_wrapper (m);
784 //g_assert (mono_method_is_generic_sharable (m, FALSE));
787 /* Patch calling code */
789 mini_jit_info_table_find (mono_domain_get (), (char *)mono_get_addr_from_ftnptr (compiled_method), NULL);
791 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
793 if (ji && target_ji && generic_shared && ji->has_generic_jit_info && !target_ji->has_generic_jit_info) {
795 * Can't patch the call as the caller is gshared, but the callee is not. Happens when
796 * generic sharing fails.
797 * FIXME: Performance problem.
802 if (!no_patch && mono_method_same_domain (ji, target_ji))
803 mono_arch_patch_callsite ((guint8 *)ji->code_start, code, (guint8 *)addr);
811 * mono_magic_trampoline:
813 * This trampoline handles normal calls from JITted code.
816 mono_magic_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp)
820 MONO_ENTER_GC_UNSAFE_UNBALANCED;
826 res = common_call_trampoline (regs, code, (MonoMethod *)arg, NULL, NULL, &error);
827 mono_error_set_pending_exception (&error);
829 mono_interruption_checkpoint_from_trampoline ();
831 MONO_EXIT_GC_UNSAFE_UNBALANCED;
837 * mono_vcall_trampoline:
839 * This trampoline handles virtual calls.
842 mono_vcall_trampoline (mgreg_t *regs, guint8 *code, int slot, guint8 *tramp)
844 MONO_REQ_GC_UNSAFE_MODE;
846 MonoObject *this_arg;
848 gpointer *vtable_slot;
856 * We need to obtain the following pieces of information:
857 * - the method which needs to be compiled.
859 * We use one vtable trampoline per vtable slot index, so we need only the vtable,
860 * the other two can be computed from the vtable + the slot index.
864 * Obtain the vtable from the 'this' arg.
866 this_arg = (MonoObject *)mono_arch_get_this_arg_from_call (regs, code);
869 vt = this_arg->vtable;
872 /* Normal virtual call */
873 vtable_slot = &(vt->vtable [slot]);
875 /* Avoid loading metadata or creating a generic vtable if possible */
876 addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, slot, &error);
877 if (!is_ok (&error)) {
878 mono_error_set_pending_exception (&error);
881 if (addr && !vt->klass->valuetype) {
882 if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
885 return mono_create_ftnptr (mono_domain_get (), addr);
890 * is_generic_method_definition() above) also
891 * goes away if we do a
892 * mono_class_setup_vtable (vt->klass) here,
893 * because we then inflate the method
894 * correctly, put it in the cache, and the
895 * "wrong" inflation invocation still looks up
896 * the correctly inflated method.
898 * The hack above seems more stable and
901 m = mono_class_get_vtable_entry (vt->klass, slot);
904 vtable_slot = &(((gpointer*)vt) [slot]);
909 res = common_call_trampoline (regs, code, m, vt, vtable_slot, &error);
910 if (!mono_error_ok (&error)) {
911 mono_error_set_pending_exception (&error);
917 #ifndef DISABLE_REMOTING
919 mono_generic_virtual_remoting_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8 *tramp)
921 MONO_REQ_GC_UNSAFE_MODE;
924 MonoGenericContext context = { NULL, NULL };
925 MonoMethod *imt_method, *declaring;
930 g_assert (m->is_generic);
933 declaring = mono_method_get_declaring_generic_method (m);
937 if (m->klass->generic_class)
938 context.class_inst = m->klass->generic_class->context.class_inst;
940 g_assert (!m->klass->generic_container);
942 imt_method = mono_arch_find_imt_method (regs, code);
943 if (imt_method->is_inflated)
944 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
945 m = mono_class_inflate_generic_method_checked (declaring, &context, &error);
946 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */;
947 m = mono_marshal_get_remoting_invoke_with_check (m);
949 addr = mono_jit_compile_method (m, &error);
950 if (!mono_error_ok (&error)) {
951 mono_error_set_pending_exception (&error);
961 * mono_aot_trampoline:
963 * This trampoline handles calls made from AOT code. We try to bypass the
964 * normal JIT compilation logic to avoid loading the metadata for the method.
966 #ifdef MONO_ARCH_AOT_SUPPORTED
968 mono_aot_trampoline (mgreg_t *regs, guint8 *code, guint8 *token_info,
971 MONO_REQ_GC_UNSAFE_MODE;
975 MonoMethod *method = NULL;
982 image = (MonoImage *)*(gpointer*)(gpointer)token_info;
983 token_info += sizeof (gpointer);
984 token = *(guint32*)(gpointer)token_info;
986 addr = mono_aot_get_method_from_token (mono_domain_get (), image, token, &error);
989 g_error ("Could not load AOT method due to %s", mono_error_get_message (&error));
990 method = mono_get_method_checked (image, token, NULL, NULL, &error);
992 g_error ("Could not load AOT method due to %s", mono_error_get_message (&error));
994 /* Use the generic code */
995 return mono_magic_trampoline (regs, code, method, tramp);
998 addr = mono_create_ftnptr (mono_domain_get (), addr);
1000 /* This is a normal call through a PLT entry */
1001 plt_entry = mono_aot_get_plt_entry (code);
1002 g_assert (plt_entry);
1004 mono_aot_patch_plt_entry (code, plt_entry, NULL, regs, (guint8 *)addr);
1010 * mono_aot_plt_trampoline:
1012 * This trampoline handles calls made from AOT code through the PLT table.
1015 mono_aot_plt_trampoline (mgreg_t *regs, guint8 *code, guint8 *aot_module,
1018 MONO_REQ_GC_UNSAFE_MODE;
1020 guint32 plt_info_offset = mono_aot_get_plt_info_offset (regs, code);
1024 trampoline_calls ++;
1026 res = mono_aot_plt_resolve (aot_module, plt_info_offset, code, &error);
1028 if (!mono_error_ok (&error)) {
1029 mono_error_set_pending_exception (&error);
1032 // FIXME: Error handling (how ?)
1041 mono_rgctx_lazy_fetch_trampoline (mgreg_t *regs, guint8 *code, gpointer data, guint8 *tramp)
1043 MONO_REQ_GC_UNSAFE_MODE;
1045 static gboolean inited = FALSE;
1046 static int num_lookups = 0;
1047 guint32 slot = GPOINTER_TO_UINT (data);
1048 mgreg_t *r = (mgreg_t*)regs;
1049 gpointer arg = (gpointer)(gssize)r [MONO_ARCH_VTABLE_REG];
1050 guint32 index = MONO_RGCTX_SLOT_INDEX (slot);
1051 gboolean mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
1055 trampoline_calls ++;
1058 mono_counters_register ("RGCTX unmanaged lookups", MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_lookups);
1065 res = mono_method_fill_runtime_generic_context ((MonoMethodRuntimeGenericContext *)arg, index, &error);
1067 res = mono_class_fill_runtime_generic_context ((MonoVTable *)arg, index, &error);
1068 if (!mono_error_ok (&error)) {
1069 mono_error_set_pending_exception (&error);
1076 * mono_delegate_trampoline:
1078 * This trampoline handles calls made to Delegate:Invoke ().
1079 * This is called once the first time a delegate is invoked, so it must be fast.
1082 mono_delegate_trampoline (mgreg_t *regs, guint8 *code, gpointer *arg, guint8* tramp)
1084 MONO_REQ_GC_UNSAFE_MODE;
1086 MonoDomain *domain = mono_domain_get ();
1087 MonoDelegate *delegate;
1090 MonoMethod *method = NULL;
1092 gboolean multicast, callvirt = FALSE, closed_over_null = FALSE;
1093 gboolean need_rgctx_tramp = FALSE;
1094 gboolean need_unbox_tramp = FALSE;
1095 gboolean enable_caching = TRUE;
1096 MonoDelegateTrampInfo *tramp_info = (MonoDelegateTrampInfo*)arg;
1097 MonoMethod *invoke = tramp_info->invoke;
1098 guint8 *impl_this = (guint8 *)tramp_info->impl_this;
1099 guint8 *impl_nothis = (guint8 *)tramp_info->impl_nothis;
1101 MonoMethodSignature *sig;
1102 gpointer addr, compiled_method;
1103 gboolean is_remote = FALSE;
1105 trampoline_calls ++;
1107 /* Obtain the delegate object according to the calling convention */
1108 delegate = (MonoDelegate *)mono_arch_get_this_arg_from_call (regs, code);
1109 g_assert (mono_class_has_parent (mono_object_class (delegate), mono_defaults.multicastdelegate_class));
1111 if (delegate->method) {
1112 method = delegate->method;
1115 * delegate->method_ptr == NULL means the delegate was initialized by
1116 * mini_delegate_ctor, while != NULL means it is initialized by
1117 * mono_delegate_ctor_with_method (). In both cases, we need to add wrappers
1118 * (ctor_with_method () does this, but it doesn't store the wrapper back into
1119 * delegate->method).
1121 #ifndef DISABLE_REMOTING
1122 if (delegate->target && delegate->target->vtable->klass == mono_defaults.transparent_proxy_class) {
1125 if (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class != mono_class_get_com_object_class () &&
1126 !mono_class_is_com_object (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class))
1128 method = mono_marshal_get_remoting_invoke (method);
1132 sig = tramp_info->sig;
1133 if (!(sig && method == tramp_info->method)) {
1134 mono_error_init (&err);
1135 sig = mono_method_signature_checked (method, &err);
1137 mono_error_set_pending_exception (&err);
1142 if (sig->hasthis && method->klass->valuetype) {
1143 gboolean need_unbox = TRUE;
1145 if (tramp_info->invoke_sig->param_count > sig->param_count && tramp_info->invoke_sig->params [0]->byref)
1150 need_unbox_tramp = TRUE;
1152 method = mono_marshal_get_unbox_wrapper (method);
1156 // If "delegate->method_ptr" is null mono_get_addr_from_ftnptr will fail if
1157 // ftnptrs are being used. "method" would end up null on archtitectures without
1158 // ftnptrs so we can just skip this.
1159 } else if (delegate->method_ptr) {
1160 ji = mono_jit_info_table_find (domain, (char *)mono_get_addr_from_ftnptr (delegate->method_ptr));
1162 method = jinfo_get_method (ji);
1166 sig = tramp_info->sig;
1167 if (!(sig && method == tramp_info->method)) {
1168 mono_error_init (&err);
1169 sig = mono_method_signature_checked (method, &err);
1171 mono_error_set_pending_exception (&err);
1176 callvirt = !delegate->target && sig->hasthis;
1178 closed_over_null = tramp_info->invoke_sig->param_count == sig->param_count;
1180 if (callvirt && !closed_over_null) {
1182 * The delegate needs to make a virtual call to the target method using its
1183 * first argument as the receiver. This is hard to support in full-aot, so
1184 * optimize it in some cases if possible.
1185 * If the target method is not virtual or is in a sealed class,
1186 * the vcall will call it directly.
1187 * If the call doesn't return a valuetype, then the vcall uses the same calling
1188 * convention as a normal call.
1190 if (((method->klass->flags & TYPE_ATTRIBUTE_SEALED) || !(method->flags & METHOD_ATTRIBUTE_VIRTUAL)) && !MONO_TYPE_ISSTRUCT (sig->ret)) {
1192 enable_caching = FALSE;
1196 if (delegate->target &&
1197 method->flags & METHOD_ATTRIBUTE_VIRTUAL &&
1198 method->flags & METHOD_ATTRIBUTE_ABSTRACT &&
1199 method->klass->flags & TYPE_ATTRIBUTE_ABSTRACT) {
1200 method = mono_object_get_virtual_method (delegate->target, method);
1201 enable_caching = FALSE;
1204 if (method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
1205 method = mono_marshal_get_synchronized_wrapper (method);
1207 if (method == tramp_info->method)
1208 need_rgctx_tramp = tramp_info->need_rgctx_tramp;
1209 else if (mono_method_needs_static_rgctx_invoke (method, FALSE))
1210 need_rgctx_tramp = TRUE;
1214 * If the called address is a trampoline, replace it with the compiled method so
1215 * further calls don't have to go through the trampoline.
1217 if (method && !callvirt) {
1218 /* Avoid the overhead of looking up an already compiled method if possible */
1219 if (enable_caching && delegate->method_code && *delegate->method_code) {
1220 delegate->method_ptr = *delegate->method_code;
1222 compiled_method = addr = mono_jit_compile_method (method, &error);
1223 if (!mono_error_ok (&error)) {
1224 mono_error_set_pending_exception (&error);
1227 addr = mini_add_method_trampoline (method, compiled_method, need_rgctx_tramp, need_unbox_tramp);
1228 delegate->method_ptr = addr;
1229 if (enable_caching && delegate->method_code)
1230 *delegate->method_code = (guint8 *)delegate->method_ptr;
1233 if (need_rgctx_tramp)
1234 delegate->method_ptr = mono_create_static_rgctx_trampoline (method, delegate->method_ptr);
1237 /* Necessary for !code condition to fallback to slow path */
1240 multicast = ((MonoMulticastDelegate*)delegate)->delegates != NULL;
1241 if (!multicast && !callvirt) {
1242 if (method && (method->flags & METHOD_ATTRIBUTE_STATIC) && mono_method_signature (method)->param_count == mono_method_signature (invoke)->param_count + 1)
1243 /* Closed static delegate */
1246 code = delegate->target ? impl_this : impl_nothis;
1250 /* The general, unoptimized case */
1251 m = mono_marshal_get_delegate_invoke (invoke, delegate);
1252 code = (guint8 *)mono_jit_compile_method (m, &error);
1253 if (!mono_error_ok (&error)) {
1254 mono_error_set_pending_exception (&error);
1257 code = (guint8 *)mini_add_method_trampoline (m, code, mono_method_needs_static_rgctx_invoke (m, FALSE), FALSE);
1260 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
1261 if (enable_caching && !callvirt && tramp_info->method) {
1262 tramp_info->method_ptr = delegate->method_ptr;
1263 tramp_info->invoke_impl = delegate->invoke_impl;
1269 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1271 mono_handler_block_guard_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_info, guint8* tramp)
1273 MONO_REQ_GC_UNSAFE_MODE;
1277 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
1278 gpointer resume_ip = jit_tls->handler_block_return_address;
1280 memcpy (&ctx, &jit_tls->handler_block_context, sizeof (MonoContext));
1281 MONO_CONTEXT_SET_IP (&ctx, jit_tls->handler_block_return_address);
1283 jit_tls->handler_block_return_address = NULL;
1284 jit_tls->handler_block = NULL;
1286 if (!resume_ip) /*this should not happen, but we should avoid crashing */
1287 exc = mono_get_exception_execution_engine ("Invalid internal state, resuming abort after handler block but no resume ip found");
1289 exc = mono_thread_resume_interruption ();
1292 mono_handle_exception (&ctx, (MonoObject *)exc);
1293 mono_restore_context (&ctx);
1300 mono_create_handler_block_trampoline (void)
1302 static gpointer code;
1304 mono_memory_barrier ();
1308 g_assert (!mono_aot_only);
1310 mono_trampolines_lock ();
1313 MonoTrampInfo *info;
1316 tmp = mono_arch_create_handler_block_trampoline (&info, FALSE);
1317 mono_tramp_info_register (info, NULL);
1318 mono_memory_barrier ();
1321 mono_trampolines_unlock ();
1328 * mono_get_trampoline_func:
1330 * Return the C function which needs to be called by the generic trampoline of type
1334 mono_get_trampoline_func (MonoTrampolineType tramp_type)
1336 switch (tramp_type) {
1337 case MONO_TRAMPOLINE_JIT:
1338 case MONO_TRAMPOLINE_JUMP:
1339 return mono_magic_trampoline;
1340 case MONO_TRAMPOLINE_RGCTX_LAZY_FETCH:
1341 return mono_rgctx_lazy_fetch_trampoline;
1342 #ifdef MONO_ARCH_AOT_SUPPORTED
1343 case MONO_TRAMPOLINE_AOT:
1344 return mono_aot_trampoline;
1345 case MONO_TRAMPOLINE_AOT_PLT:
1346 return mono_aot_plt_trampoline;
1348 case MONO_TRAMPOLINE_DELEGATE:
1349 return mono_delegate_trampoline;
1350 case MONO_TRAMPOLINE_RESTORE_STACK_PROT:
1351 return mono_altstack_restore_prot;
1352 #ifndef DISABLE_REMOTING
1353 case MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING:
1354 return mono_generic_virtual_remoting_trampoline;
1356 case MONO_TRAMPOLINE_VCALL:
1357 return mono_vcall_trampoline;
1358 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1359 case MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD:
1360 return mono_handler_block_guard_trampoline;
1363 g_assert_not_reached ();
1369 create_trampoline_code (MonoTrampolineType tramp_type)
1371 MonoTrampInfo *info;
1374 code = mono_arch_create_generic_trampoline (tramp_type, &info, FALSE);
1375 mono_tramp_info_register (info, NULL);
1381 mono_trampolines_init (void)
1383 mono_os_mutex_init_recursive (&trampolines_mutex);
1388 mono_trampoline_code [MONO_TRAMPOLINE_JIT] = create_trampoline_code (MONO_TRAMPOLINE_JIT);
1389 mono_trampoline_code [MONO_TRAMPOLINE_JUMP] = create_trampoline_code (MONO_TRAMPOLINE_JUMP);
1390 mono_trampoline_code [MONO_TRAMPOLINE_RGCTX_LAZY_FETCH] = create_trampoline_code (MONO_TRAMPOLINE_RGCTX_LAZY_FETCH);
1391 #ifdef MONO_ARCH_AOT_SUPPORTED
1392 mono_trampoline_code [MONO_TRAMPOLINE_AOT] = create_trampoline_code (MONO_TRAMPOLINE_AOT);
1393 mono_trampoline_code [MONO_TRAMPOLINE_AOT_PLT] = create_trampoline_code (MONO_TRAMPOLINE_AOT_PLT);
1395 mono_trampoline_code [MONO_TRAMPOLINE_DELEGATE] = create_trampoline_code (MONO_TRAMPOLINE_DELEGATE);
1396 mono_trampoline_code [MONO_TRAMPOLINE_RESTORE_STACK_PROT] = create_trampoline_code (MONO_TRAMPOLINE_RESTORE_STACK_PROT);
1397 #ifndef DISABLE_REMOTING
1398 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING);
1400 mono_trampoline_code [MONO_TRAMPOLINE_VCALL] = create_trampoline_code (MONO_TRAMPOLINE_VCALL);
1401 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1402 mono_trampoline_code [MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD] = create_trampoline_code (MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD);
1403 mono_create_handler_block_trampoline ();
1406 mono_counters_register ("Calls to trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &trampoline_calls);
1407 mono_counters_register ("JIT trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &jit_trampolines);
1408 mono_counters_register ("Unbox trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &unbox_trampolines);
1409 mono_counters_register ("Static rgctx trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &static_rgctx_trampolines);
1413 mono_trampolines_cleanup (void)
1415 if (rgctx_lazy_fetch_trampoline_hash)
1416 g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash);
1417 if (rgctx_lazy_fetch_trampoline_hash_addr)
1418 g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash_addr);
1420 mono_os_mutex_destroy (&trampolines_mutex);
1424 mono_get_trampoline_code (MonoTrampolineType tramp_type)
1426 g_assert (mono_trampoline_code [tramp_type]);
1428 return mono_trampoline_code [tramp_type];
1432 mono_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
1435 return mono_aot_create_specific_trampoline (mono_defaults.corlib, arg1, tramp_type, domain, code_len);
1437 return mono_arch_create_specific_trampoline (arg1, tramp_type, domain, code_len);
1441 mono_create_jump_trampoline (MonoDomain *domain, MonoMethod *method, gboolean add_sync_wrapper, MonoError *error)
1445 guint32 code_size = 0;
1447 mono_error_init (error);
1449 code = mono_jit_find_compiled_method_with_jit_info (domain, method, &ji);
1451 * We cannot recover the correct type of a shared generic
1452 * method from its native code address, so we use the
1453 * trampoline instead.
1454 * For synchronized methods, the trampoline adds the wrapper.
1456 if (code && !ji->has_generic_jit_info && !(method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED))
1459 if (mono_llvm_only) {
1460 code = mono_jit_compile_method (method, error);
1461 if (!mono_error_ok (error))
1466 mono_domain_lock (domain);
1467 code = g_hash_table_lookup (domain_jit_info (domain)->jump_trampoline_hash, method);
1468 mono_domain_unlock (domain);
1472 code = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JUMP, mono_domain_get (), &code_size);
1473 g_assert (code_size);
1475 ji = (MonoJitInfo *)mono_domain_alloc0 (domain, MONO_SIZEOF_JIT_INFO);
1476 ji->code_start = code;
1477 ji->code_size = code_size;
1478 ji->d.method = method;
1481 * mono_delegate_ctor needs to find the method metadata from the
1482 * trampoline address, so we save it here.
1485 mono_jit_info_table_add (domain, ji);
1487 mono_domain_lock (domain);
1488 g_hash_table_insert (domain_jit_info (domain)->jump_trampoline_hash, method, ji->code_start);
1489 mono_domain_unlock (domain);
1491 return ji->code_start;
1495 method_not_found (void)
1497 g_assert_not_reached ();
1501 mono_create_jit_trampoline (MonoDomain *domain, MonoMethod *method, MonoError *error)
1505 mono_error_init (error);
1507 if (mono_aot_only) {
1508 /* Avoid creating trampolines if possible */
1509 gpointer code = mono_jit_find_compiled_method (domain, method);
1513 if (mono_llvm_only) {
1514 if (method->wrapper_type == MONO_WRAPPER_PROXY_ISINST || method->wrapper_type == MONO_WRAPPER_LDFLD_REMOTE ||
1515 method->wrapper_type == MONO_WRAPPER_STFLD_REMOTE)
1516 /* These wrappers are not generated */
1517 return method_not_found;
1518 /* Methods are lazily initialized on first call, so this can't lead recursion */
1519 code = mono_jit_compile_method (method, error);
1520 if (!mono_error_ok (error))
1526 mono_domain_lock (domain);
1527 tramp = g_hash_table_lookup (domain_jit_info (domain)->jit_trampoline_hash, method);
1528 mono_domain_unlock (domain);
1532 tramp = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JIT, domain, NULL);
1534 mono_domain_lock (domain);
1535 g_hash_table_insert (domain_jit_info (domain)->jit_trampoline_hash, method, tramp);
1536 mono_domain_unlock (domain);
1544 mono_create_jit_trampoline_from_token (MonoImage *image, guint32 token)
1548 MonoDomain *domain = mono_domain_get ();
1549 guint8 *buf, *start;
1551 buf = start = (guint8 *)mono_domain_alloc0 (domain, 2 * sizeof (gpointer));
1553 *(gpointer*)(gpointer)buf = image;
1554 buf += sizeof (gpointer);
1555 *(guint32*)(gpointer)buf = token;
1557 tramp = mono_create_specific_trampoline (start, MONO_TRAMPOLINE_AOT, domain, NULL);
1566 * mono_create_delegate_trampoline_info:
1568 * Create a trampoline info structure for the KLASS+METHOD pair.
1570 MonoDelegateTrampInfo*
1571 mono_create_delegate_trampoline_info (MonoDomain *domain, MonoClass *klass, MonoMethod *method)
1575 MonoDelegateTrampInfo *tramp_info;
1576 MonoClassMethodPair pair, *dpair;
1577 guint32 code_size = 0;
1580 pair.method = method;
1581 mono_domain_lock (domain);
1582 tramp_info = (MonoDelegateTrampInfo *)g_hash_table_lookup (domain_jit_info (domain)->delegate_trampoline_hash, &pair);
1583 mono_domain_unlock (domain);
1587 invoke = mono_get_delegate_invoke (klass);
1590 tramp_info = (MonoDelegateTrampInfo *)mono_domain_alloc0 (domain, sizeof (MonoDelegateTrampInfo));
1591 tramp_info->invoke = invoke;
1592 tramp_info->invoke_sig = mono_method_signature (invoke);
1593 tramp_info->impl_this = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), TRUE);
1594 tramp_info->impl_nothis = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), FALSE);
1595 tramp_info->method = method;
1597 mono_error_init (&error);
1598 tramp_info->sig = mono_method_signature_checked (method, &error);
1599 tramp_info->need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (method, FALSE);
1601 tramp_info->invoke_impl = mono_create_specific_trampoline (tramp_info, MONO_TRAMPOLINE_DELEGATE, domain, &code_size);
1602 g_assert (code_size);
1604 dpair = (MonoClassMethodPair *)mono_domain_alloc0 (domain, sizeof (MonoClassMethodPair));
1605 memcpy (dpair, &pair, sizeof (MonoClassMethodPair));
1607 /* store trampoline address */
1608 mono_domain_lock (domain);
1609 g_hash_table_insert (domain_jit_info (domain)->delegate_trampoline_hash, dpair, tramp_info);
1610 mono_domain_unlock (domain);
1616 no_delegate_trampoline (void)
1618 g_assert_not_reached ();
1622 mono_create_delegate_trampoline (MonoDomain *domain, MonoClass *klass)
1625 return no_delegate_trampoline;
1627 return mono_create_delegate_trampoline_info (domain, klass, NULL)->invoke_impl;
1631 mono_create_delegate_virtual_trampoline (MonoDomain *domain, MonoClass *klass, MonoMethod *method)
1633 MonoMethod *invoke = mono_get_delegate_invoke (klass);
1636 return mono_get_delegate_virtual_invoke_impl (mono_method_signature (invoke), method);
1640 mono_create_rgctx_lazy_fetch_trampoline (guint32 offset)
1642 static gboolean inited = FALSE;
1643 static int num_trampolines = 0;
1644 MonoTrampInfo *info;
1646 gpointer tramp, ptr;
1648 mono_trampolines_lock ();
1649 if (rgctx_lazy_fetch_trampoline_hash)
1650 tramp = g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset));
1653 mono_trampolines_unlock ();
1657 if (mono_aot_only) {
1658 ptr = mono_aot_get_lazy_fetch_trampoline (offset);
1660 tramp = mono_arch_create_rgctx_lazy_fetch_trampoline (offset, &info, FALSE);
1661 mono_tramp_info_register (info, NULL);
1662 ptr = mono_create_ftnptr (mono_get_root_domain (), tramp);
1665 mono_trampolines_lock ();
1666 if (!rgctx_lazy_fetch_trampoline_hash) {
1667 rgctx_lazy_fetch_trampoline_hash = g_hash_table_new (NULL, NULL);
1668 rgctx_lazy_fetch_trampoline_hash_addr = g_hash_table_new (NULL, NULL);
1670 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset), ptr);
1671 g_assert (offset != -1);
1672 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash_addr, ptr, GUINT_TO_POINTER (offset + 1));
1673 mono_trampolines_unlock ();
1676 mono_counters_register ("RGCTX num lazy fetch trampolines",
1677 MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_trampolines);
1686 mono_find_rgctx_lazy_fetch_trampoline_by_addr (gconstpointer addr)
1690 mono_trampolines_lock ();
1691 if (rgctx_lazy_fetch_trampoline_hash_addr) {
1692 /* We store the real offset + 1 so we can detect when the lookup fails */
1693 offset = GPOINTER_TO_INT (g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash_addr, addr));
1701 mono_trampolines_unlock ();
1705 static const char*tramp_names [MONO_TRAMPOLINE_NUM] = {
1712 "restore_stack_prot",
1713 "generic_virtual_remoting",
1715 "handler_block_guard"
1719 * mono_get_generic_trampoline_simple_name:
1723 mono_get_generic_trampoline_simple_name (MonoTrampolineType tramp_type)
1725 return tramp_names [tramp_type];
1729 * mono_get_generic_trampoline_name:
1731 * Returns a pointer to malloc-ed memory.
1734 mono_get_generic_trampoline_name (MonoTrampolineType tramp_type)
1736 return g_strdup_printf ("generic_trampoline_%s", tramp_names [tramp_type]);
1740 * mono_get_rgctx_fetch_trampoline_name:
1742 * Returns a pointer to malloc-ed memory.
1745 mono_get_rgctx_fetch_trampoline_name (int slot)
1750 mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
1751 index = MONO_RGCTX_SLOT_INDEX (slot);
1753 return g_strdup_printf ("rgctx_fetch_trampoline_%s_%d", mrgctx ? "mrgctx" : "rgctx", index);
1757 * mini_get_single_step_trampoline:
1759 * Return a trampoline which calls debugger_agent_single_step_from_context ().
1762 mini_get_single_step_trampoline (void)
1764 static gpointer trampoline;
1769 if (mono_aot_only) {
1770 tramp = mono_aot_get_trampoline ("sdb_single_step_trampoline");
1772 #ifdef MONO_ARCH_HAVE_SDB_TRAMPOLINES
1773 MonoTrampInfo *info;
1774 tramp = mono_arch_create_sdb_trampoline (TRUE, &info, FALSE);
1775 mono_tramp_info_register (info, NULL);
1778 g_assert_not_reached ();
1781 mono_memory_barrier ();
1789 * mini_get_breakpoint_trampoline:
1791 * Return a trampoline which calls debugger_agent_breakpoint_from_context ().
1794 mini_get_breakpoint_trampoline (void)
1796 static gpointer trampoline;
1801 if (mono_aot_only) {
1802 tramp = mono_aot_get_trampoline ("sdb_breakpoint_trampoline");
1804 #ifdef MONO_ARCH_HAVE_SDB_TRAMPOLINES
1805 MonoTrampInfo *info;
1806 tramp = mono_arch_create_sdb_trampoline (FALSE, &info, FALSE);
1807 mono_tramp_info_register (info, NULL);
1810 g_assert_not_reached ();
1813 mono_memory_barrier ();