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 */
206 /* Avoid loading metadata or creating a generic vtable if possible */
207 if (lookup_aot && !vt->klass->valuetype)
208 aot_addr = (guint8 *)mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, interface_offset + mono_method_get_vtable_slot (imt_method));
214 impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_vtable_slot (imt_method));
217 if (impl && mono_method_needs_static_rgctx_invoke (impl, FALSE))
218 need_rgctx_tramp = TRUE;
219 if (impl && impl->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED) {
220 WrapperInfo *info = mono_marshal_get_wrapper_info (impl);
222 if (info && info->subtype == WRAPPER_SUBTYPE_GENERIC_ARRAY_HELPER)
223 need_rgctx_tramp = TRUE;
226 *out_need_rgctx_tramp = need_rgctx_tramp;
227 *out_aot_addr = aot_addr;
229 DEBUG_IMT (printf ("mono_convert_imt_slot_to_vtable_slot: method = %s.%s.%s, imt_method = %s.%s.%s\n",
230 method->klass->name_space, method->klass->name, method->name,
231 imt_method->klass->name_space, imt_method->klass->name, imt_method->name));
233 if (vt->imt_collisions_bitmap & (1 << imt_slot)) {
234 int slot = mono_method_get_vtable_index (imt_method);
237 g_assert (slot != -1);
238 vtable_offset = interface_offset + slot;
239 vtable_slot = & (vt->vtable [vtable_offset]);
240 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));
243 DEBUG_IMT (printf ("mono_convert_imt_slot_to_vtable_slot: slot %p[%d] is in the IMT, but not colliding\n", slot, imt_slot));
249 * This is a super-ugly hack to fix bug #616463.
251 * The problem is that we don't always set is_generic for generic
252 * method definitions. See the comment at the end of
253 * mono_class_inflate_generic_method_full_checked() in class.c.
256 is_generic_method_definition (MonoMethod *m)
258 MonoGenericContext *context;
264 context = mono_method_get_context (m);
265 if (!context->method_inst)
267 if (context->method_inst == mono_method_get_generic_container (((MonoMethodInflated*)m)->declaring)->context.method_inst)
273 mini_jit_info_is_gsharedvt (MonoJitInfo *ji)
275 if (ji && ji->has_generic_jit_info && (mono_jit_info_get_generic_sharing_context (ji)->is_gsharedvt))
282 * mini_add_method_trampoline:
285 * @add_static_rgctx_tramp: adds a static rgctx trampoline
286 * @add_unbox_tramp: adds an unboxing trampoline
288 * Add static rgctx/gsharedvt_in/unbox trampolines to
289 * M/COMPILED_METHOD if needed.
291 * Returns the trampoline address, or COMPILED_METHOD if no trampoline
295 mini_add_method_trampoline (MonoMethod *m, gpointer compiled_method, gboolean add_static_rgctx_tramp, gboolean add_unbox_tramp)
297 gpointer addr = compiled_method;
298 gboolean callee_gsharedvt, callee_array_helper;
299 MonoMethod *jmethod = NULL;
302 // FIXME: This loads information from AOT (perf problem)
303 ji = mini_jit_info_table_find (mono_domain_get (), (char *)mono_get_addr_from_ftnptr (compiled_method), NULL);
304 callee_gsharedvt = mini_jit_info_is_gsharedvt (ji);
306 callee_array_helper = FALSE;
307 if (m->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED) {
308 WrapperInfo *info = mono_marshal_get_wrapper_info (m);
311 * generic array helpers.
312 * Have to replace the wrappers with the original generic instances.
314 if (info && info->subtype == WRAPPER_SUBTYPE_GENERIC_ARRAY_HELPER) {
315 callee_array_helper = TRUE;
316 m = info->d.generic_array_helper.method;
318 } else if (m->wrapper_type == MONO_WRAPPER_UNKNOWN) {
319 WrapperInfo *info = mono_marshal_get_wrapper_info (m);
321 /* Same for synchronized inner wrappers */
322 if (info && info->subtype == WRAPPER_SUBTYPE_SYNCHRONIZED_INNER) {
323 m = info->d.synchronized_inner.method;
327 if (callee_gsharedvt)
328 g_assert (m->is_inflated);
330 addr = compiled_method;
332 if (add_unbox_tramp) {
334 * The unbox trampolines call the method directly, so need to add
335 * an rgctx tramp before them.
338 addr = mono_aot_get_unbox_trampoline (m);
340 unbox_trampolines ++;
341 addr = mono_arch_get_unbox_trampoline (m, addr);
345 if (ji && !ji->is_trampoline)
346 jmethod = jinfo_get_method (ji);
347 if (callee_gsharedvt && mini_is_gsharedvt_variable_signature (mono_method_signature (jmethod))) {
348 MonoMethodSignature *sig, *gsig;
350 /* Here m is a generic instance, while ji->method is the gsharedvt method implementing it */
352 /* Call from normal/gshared code to gsharedvt code with variable signature */
353 sig = mono_method_signature (m);
354 gsig = mono_method_signature (jmethod);
356 addr = mini_get_gsharedvt_wrapper (TRUE, addr, sig, gsig, -1, FALSE);
359 g_assert_not_reached ();
360 //printf ("IN: %s\n", mono_method_full_name (m, TRUE));
363 if (callee_array_helper) {
364 add_static_rgctx_tramp = FALSE;
365 /* FIXME: ji->from_aot is not set for llvm methods */
366 if (ji && (ji->from_aot || mono_aot_only)) {
367 /* In AOT mode, compiled_method points to one of the InternalArray methods in Array. */
368 if (!mono_llvm_only && mono_method_needs_static_rgctx_invoke (jinfo_get_method (ji), TRUE))
369 add_static_rgctx_tramp = TRUE;
374 add_static_rgctx_tramp = FALSE;
376 if (add_static_rgctx_tramp)
377 addr = mono_create_static_rgctx_trampoline (m, addr);
383 * mini_create_llvmonly_ftndesc:
385 * Create a function descriptor of the form <addr, arg>, which
386 * represents a callee ADDR with ARG as the last argument.
388 * - generic sharing (ARG is the rgctx)
389 * - gsharedvt signature wrappers (ARG is a function descriptor)
392 mini_create_llvmonly_ftndesc (MonoDomain *domain, gpointer addr, gpointer arg)
394 MonoFtnDesc *ftndesc = (MonoFtnDesc*)mono_domain_alloc0 (mono_domain_get (), 2 * sizeof (gpointer));
395 ftndesc->addr = addr;
402 * mini_add_method_wrappers_llvmonly:
404 * Add unbox/gsharedvt wrappers around COMPILED_METHOD if needed. Return the wrapper address or COMPILED_METHOD
405 * if no wrapper is needed. Set OUT_ARG to the rgctx/extra argument needed to be passed to the returned method.
408 mini_add_method_wrappers_llvmonly (MonoMethod *m, gpointer compiled_method, gboolean caller_gsharedvt, gboolean add_unbox_tramp, gpointer *out_arg)
411 gboolean callee_gsharedvt, callee_array_helper;
412 MonoMethod *jmethod = NULL;
415 // FIXME: This loads information from AOT (perf problem)
416 ji = mini_jit_info_table_find (mono_domain_get (), (char *)mono_get_addr_from_ftnptr (compiled_method), NULL);
417 callee_gsharedvt = mini_jit_info_is_gsharedvt (ji);
419 callee_array_helper = FALSE;
420 if (m->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED) {
421 WrapperInfo *info = mono_marshal_get_wrapper_info (m);
424 * generic array helpers.
425 * Have to replace the wrappers with the original generic instances.
427 if (info && info->subtype == WRAPPER_SUBTYPE_GENERIC_ARRAY_HELPER) {
428 callee_array_helper = TRUE;
429 m = info->d.generic_array_helper.method;
431 } else if (m->wrapper_type == MONO_WRAPPER_UNKNOWN) {
432 WrapperInfo *info = mono_marshal_get_wrapper_info (m);
434 /* Same for synchronized inner wrappers */
435 if (info && info->subtype == WRAPPER_SUBTYPE_SYNCHRONIZED_INNER) {
436 m = info->d.synchronized_inner.method;
440 if (callee_gsharedvt)
441 g_assert (m->is_inflated);
443 addr = compiled_method;
445 if (add_unbox_tramp) {
447 * The unbox trampolines call the method directly, so need to add
448 * an rgctx tramp before them.
451 addr = mono_aot_get_unbox_trampoline (m);
453 unbox_trampolines ++;
454 addr = mono_arch_get_unbox_trampoline (m, addr);
458 g_assert (mono_llvm_only);
461 if (ji && !ji->is_trampoline)
462 jmethod = jinfo_get_method (ji);
464 if (callee_gsharedvt)
465 callee_gsharedvt = mini_is_gsharedvt_variable_signature (mono_method_signature (jmethod));
467 if (!caller_gsharedvt && callee_gsharedvt) {
468 MonoMethodSignature *sig, *gsig;
469 gpointer wrapper_addr;
471 /* Here m is a generic instance, while ji->method is the gsharedvt method implementing it */
473 /* Call from normal/gshared code to gsharedvt code with variable signature */
474 sig = mono_method_signature (m);
475 gsig = mono_method_signature (jmethod);
477 wrapper_addr = mini_get_gsharedvt_wrapper (TRUE, addr, sig, gsig, -1, FALSE);
480 * This is a gsharedvt in wrapper, it gets passed a ftndesc for the gsharedvt method as an argument.
482 *out_arg = mini_create_llvmonly_ftndesc (mono_domain_get (), addr, mini_method_get_rgctx (m));
484 //printf ("IN: %s\n", mono_method_full_name (m, TRUE));
487 if (!(*out_arg) && mono_method_needs_static_rgctx_invoke (m, FALSE))
488 *out_arg = mini_method_get_rgctx (m);
490 if (caller_gsharedvt && !callee_gsharedvt) {
492 * The callee uses the gsharedvt calling convention, have to add an out wrapper.
494 gpointer out_wrapper = mini_get_gsharedvt_wrapper (FALSE, NULL, mono_method_signature (m), NULL, -1, FALSE);
495 MonoFtnDesc *out_wrapper_arg = mini_create_llvmonly_ftndesc (mono_domain_get (), addr, *out_arg);
498 *out_arg = out_wrapper_arg;
505 * common_call_trampoline_inner:
507 * The code to handle normal, virtual, and interface method calls and jumps, both
508 * from JITted and LLVM compiled code.
511 common_call_trampoline_inner (mgreg_t *regs, guint8 *code, MonoMethod *m, MonoVTable *vt, gpointer *vtable_slot, MonoError *error)
513 gpointer addr, compiled_method;
514 gboolean generic_shared = FALSE;
515 gboolean need_unbox_tramp = FALSE;
516 gboolean need_rgctx_tramp = FALSE;
517 MonoMethod *declaring = NULL;
518 MonoMethod *generic_virtual = NULL, *variant_iface = NULL;
520 gboolean imt_call, virtual_;
521 gpointer *orig_vtable_slot, *vtable_slot_to_patch = NULL;
522 MonoJitInfo *ji = NULL;
524 mono_error_init (error);
526 virtual_ = vt && (gpointer)vtable_slot > (gpointer)vt;
527 imt_call = vt && (gpointer)vtable_slot < (gpointer)vt;
530 * rgctx trampolines are needed when the call is indirect so the caller can't pass
531 * the rgctx argument needed by the callee.
534 need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (m, FALSE);
536 orig_vtable_slot = vtable_slot;
537 vtable_slot_to_patch = vtable_slot;
541 MonoMethod *imt_method = NULL, *impl_method = NULL;
542 MonoObject *this_arg;
544 g_assert (vtable_slot);
546 imt_method = mono_arch_find_imt_method (regs, code);
547 this_arg = (MonoObject *)mono_arch_get_this_arg_from_call (regs, code);
549 if (mono_object_is_transparent_proxy (this_arg)) {
550 /* Use the slow path for now */
551 m = mono_object_get_virtual_method (this_arg, imt_method);
552 vtable_slot_to_patch = NULL;
554 if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) {
555 /* Generic virtual method */
556 generic_virtual = imt_method;
557 need_rgctx_tramp = TRUE;
560 vtable_slot = mini_resolve_imt_method (vt, vtable_slot, imt_method, &impl_method, &addr, &need_rgctx_tramp, &variant_iface);
561 /* This is the vcall slot which gets called through the IMT thunk */
562 vtable_slot_to_patch = vtable_slot;
566 * We found AOT compiled code for the method, skip the rest.
568 if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
571 return mono_create_ftnptr (mono_domain_get (), addr);
579 * The virtual check is needed because is_generic_method_definition (m) could
580 * return TRUE for methods used in IMT calls too.
582 if (virtual_ && is_generic_method_definition (m)) {
584 MonoGenericContext context = { NULL, NULL };
585 MonoMethod *declaring;
588 declaring = mono_method_get_declaring_generic_method (m);
592 if (m->klass->generic_class)
593 context.class_inst = m->klass->generic_class->context.class_inst;
595 g_assert (!m->klass->generic_container);
597 generic_virtual = mono_arch_find_imt_method (regs, code);
598 g_assert (generic_virtual);
599 g_assert (generic_virtual->is_inflated);
600 context.method_inst = ((MonoMethodInflated*)generic_virtual)->context.method_inst;
602 m = mono_class_inflate_generic_method_checked (declaring, &context, &error);
603 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */
604 /* FIXME: only do this if the method is sharable */
605 need_rgctx_tramp = TRUE;
606 } else if ((context_used = mono_method_check_context_used (m))) {
607 MonoClass *klass = NULL;
608 MonoMethod *actual_method = NULL;
609 MonoVTable *vt = NULL;
610 MonoGenericInst *method_inst = NULL;
613 generic_shared = TRUE;
618 * The caller is gshared code, compute the actual method to call from M and this/rgctx.
620 if (m->is_inflated && mono_method_get_context (m)->method_inst) {
621 MonoMethodRuntimeGenericContext *mrgctx = (MonoMethodRuntimeGenericContext*)mono_arch_find_static_call_vtable (regs, code);
623 klass = mrgctx->class_vtable->klass;
624 method_inst = mrgctx->method_inst;
625 } else if ((m->flags & METHOD_ATTRIBUTE_STATIC) || m->klass->valuetype) {
626 MonoVTable *vtable = mono_arch_find_static_call_vtable (regs, code);
628 klass = vtable->klass;
630 MonoObject *this_argument = (MonoObject *)mono_arch_get_this_arg_from_call (regs, code);
632 vt = this_argument->vtable;
633 vtable_slot = orig_vtable_slot;
635 g_assert (this_argument->vtable->klass->inited);
638 mono_class_setup_supertypes (this_argument->vtable->klass);
639 klass = this_argument->vtable->klass->supertypes [m->klass->idepth - 1];
643 g_assert (vtable_slot || klass);
646 int displacement = vtable_slot - ((gpointer*)vt);
648 g_assert_not_reached ();
650 g_assert (displacement > 0);
652 actual_method = vt->klass->vtable [displacement];
655 if (method_inst || m->wrapper_type) {
657 MonoGenericContext context = { NULL, NULL };
660 declaring = mono_method_get_declaring_generic_method (m);
664 if (klass->generic_class)
665 context.class_inst = klass->generic_class->context.class_inst;
666 else if (klass->generic_container)
667 context.class_inst = klass->generic_container->context.class_inst;
668 context.method_inst = method_inst;
670 actual_method = mono_class_inflate_generic_method_checked (declaring, &context, &error);
671 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */
673 actual_method = mono_class_get_method_generic (klass, m);
677 g_assert (actual_method);
678 g_assert (actual_method->klass == klass);
680 if (actual_method->is_inflated)
681 declaring = mono_method_get_declaring_generic_method (actual_method);
688 if (m->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) {
689 m = mono_marshal_get_synchronized_wrapper (m);
690 need_rgctx_tramp = FALSE;
693 /* Calls made through delegates on platforms without delegate trampolines */
694 if (!code && mono_method_needs_static_rgctx_invoke (m, FALSE))
695 need_rgctx_tramp = TRUE;
697 addr = compiled_method = mono_jit_compile_method (m, error);
701 if (generic_virtual || variant_iface) {
702 if (vt->klass->valuetype) /*FIXME is this required variant iface?*/
703 need_unbox_tramp = TRUE;
704 } else if (orig_vtable_slot) {
705 if (m->klass->valuetype)
706 need_unbox_tramp = TRUE;
709 addr = mini_add_method_trampoline (m, compiled_method, need_rgctx_tramp, need_unbox_tramp);
711 if (generic_virtual || variant_iface) {
712 MonoMethod *target = generic_virtual ? generic_virtual : variant_iface;
714 vtable_slot = orig_vtable_slot;
715 g_assert (vtable_slot);
717 mono_method_add_generic_virtual_invocation (mono_domain_get (),
724 /* the method was jumped to */
726 MonoDomain *domain = mono_domain_get ();
728 /* Patch the got entries pointing to this method */
730 * We do this here instead of in mono_codegen () to cover the case when m
731 * was loaded from an aot image.
733 if (domain_jit_info (domain)->jump_target_got_slot_hash) {
736 mono_domain_lock (domain);
737 list = (GSList *)g_hash_table_lookup (domain_jit_info (domain)->jump_target_got_slot_hash, m);
739 for (tmp = list; tmp; tmp = tmp->next) {
740 gpointer *got_slot = (gpointer *)tmp->data;
743 g_hash_table_remove (domain_jit_info (domain)->jump_target_got_slot_hash, m);
746 mono_domain_unlock (domain);
752 vtable_slot = orig_vtable_slot;
755 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))) {
756 g_assert (*vtable_slot_to_patch);
757 *vtable_slot_to_patch = mono_get_addr_from_ftnptr (addr);
760 guint8 *plt_entry = mono_aot_get_plt_entry (code);
761 gboolean no_patch = FALSE;
762 MonoJitInfo *target_ji;
765 if (generic_shared) {
767 mini_jit_info_table_find (mono_domain_get (), (char *)mono_get_addr_from_ftnptr (compiled_method), NULL);
769 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
771 if (ji && target_ji && generic_shared && ji->has_generic_jit_info && !target_ji->has_generic_jit_info) {
776 mono_aot_patch_plt_entry (code, plt_entry, NULL, regs, (guint8 *)addr);
778 if (generic_shared) {
779 if (m->wrapper_type != MONO_WRAPPER_NONE)
780 m = mono_marshal_method_from_wrapper (m);
781 //g_assert (mono_method_is_generic_sharable (m, FALSE));
784 /* Patch calling code */
786 mini_jit_info_table_find (mono_domain_get (), (char *)mono_get_addr_from_ftnptr (compiled_method), NULL);
788 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
790 if (ji && target_ji && generic_shared && ji->has_generic_jit_info && !target_ji->has_generic_jit_info) {
792 * Can't patch the call as the caller is gshared, but the callee is not. Happens when
793 * generic sharing fails.
794 * FIXME: Performance problem.
799 if (!no_patch && mono_method_same_domain (ji, target_ji))
800 mono_arch_patch_callsite ((guint8 *)ji->code_start, code, (guint8 *)addr);
808 common_call_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, MonoVTable *vt, gpointer *vtable_slot, MonoError *error)
811 MONO_PREPARE_RESET_BLOCKING;
812 res = common_call_trampoline_inner (regs, code, m, vt, vtable_slot, error);
813 MONO_FINISH_RESET_BLOCKING;
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)
830 res = common_call_trampoline (regs, code, (MonoMethod *)arg, NULL, NULL, &error);
831 if (!mono_error_ok (&error)) {
832 mono_error_set_pending_exception (&error);
839 * mono_vcall_trampoline:
841 * This trampoline handles virtual calls.
844 mono_vcall_trampoline (mgreg_t *regs, guint8 *code, int slot, guint8 *tramp)
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);
877 if (addr && !vt->klass->valuetype) {
878 if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
881 return mono_create_ftnptr (mono_domain_get (), addr);
886 * is_generic_method_definition() above) also
887 * goes away if we do a
888 * mono_class_setup_vtable (vt->klass) here,
889 * because we then inflate the method
890 * correctly, put it in the cache, and the
891 * "wrong" inflation invocation still looks up
892 * the correctly inflated method.
894 * The hack above seems more stable and
897 m = mono_class_get_vtable_entry (vt->klass, slot);
900 vtable_slot = &(((gpointer*)vt) [slot]);
905 res = common_call_trampoline (regs, code, m, vt, vtable_slot, &error);
906 if (!mono_error_ok (&error)) {
907 mono_error_set_pending_exception (&error);
913 #ifndef DISABLE_REMOTING
915 mono_generic_virtual_remoting_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8 *tramp)
918 MonoGenericContext context = { NULL, NULL };
919 MonoMethod *imt_method, *declaring;
924 g_assert (m->is_generic);
927 declaring = mono_method_get_declaring_generic_method (m);
931 if (m->klass->generic_class)
932 context.class_inst = m->klass->generic_class->context.class_inst;
934 g_assert (!m->klass->generic_container);
936 imt_method = mono_arch_find_imt_method (regs, code);
937 if (imt_method->is_inflated)
938 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
939 m = mono_class_inflate_generic_method_checked (declaring, &context, &error);
940 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */;
941 m = mono_marshal_get_remoting_invoke_with_check (m);
943 addr = mono_jit_compile_method (m, &error);
944 if (!mono_error_ok (&error)) {
945 mono_error_set_pending_exception (&error);
955 * mono_aot_trampoline:
957 * This trampoline handles calls made from AOT code. We try to bypass the
958 * normal JIT compilation logic to avoid loading the metadata for the method.
960 #ifdef MONO_ARCH_AOT_SUPPORTED
962 mono_aot_trampoline (mgreg_t *regs, guint8 *code, guint8 *token_info,
967 MonoMethod *method = NULL;
973 image = (MonoImage *)*(gpointer*)(gpointer)token_info;
974 token_info += sizeof (gpointer);
975 token = *(guint32*)(gpointer)token_info;
977 addr = mono_aot_get_method_from_token (mono_domain_get (), image, token);
980 method = mono_get_method_checked (image, token, NULL, NULL, &error);
982 g_error ("Could not load AOT trampoline due to %s", mono_error_get_message (&error));
984 /* Use the generic code */
985 return mono_magic_trampoline (regs, code, method, tramp);
988 addr = mono_create_ftnptr (mono_domain_get (), addr);
990 /* This is a normal call through a PLT entry */
991 plt_entry = mono_aot_get_plt_entry (code);
992 g_assert (plt_entry);
994 mono_aot_patch_plt_entry (code, plt_entry, NULL, regs, (guint8 *)addr);
1000 * mono_aot_plt_trampoline:
1002 * This trampoline handles calls made from AOT code through the PLT table.
1005 mono_aot_plt_trampoline (mgreg_t *regs, guint8 *code, guint8 *aot_module,
1008 guint32 plt_info_offset = mono_aot_get_plt_info_offset (regs, code);
1012 trampoline_calls ++;
1014 res = mono_aot_plt_resolve (aot_module, plt_info_offset, code, &error);
1016 if (!mono_error_ok (&error)) {
1017 mono_error_set_pending_exception (&error);
1020 // FIXME: Error handling (how ?)
1029 mono_rgctx_lazy_fetch_trampoline (mgreg_t *regs, guint8 *code, gpointer data, guint8 *tramp)
1031 static gboolean inited = FALSE;
1032 static int num_lookups = 0;
1033 guint32 slot = GPOINTER_TO_UINT (data);
1034 mgreg_t *r = (mgreg_t*)regs;
1035 gpointer arg = (gpointer)(gssize)r [MONO_ARCH_VTABLE_REG];
1036 guint32 index = MONO_RGCTX_SLOT_INDEX (slot);
1037 gboolean mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
1041 trampoline_calls ++;
1044 mono_counters_register ("RGCTX unmanaged lookups", MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_lookups);
1051 res = mono_method_fill_runtime_generic_context ((MonoMethodRuntimeGenericContext *)arg, index, &error);
1053 res = mono_class_fill_runtime_generic_context ((MonoVTable *)arg, index, &error);
1054 if (!mono_error_ok (&error)) {
1055 mono_error_set_pending_exception (&error);
1062 * mono_delegate_trampoline:
1064 * This trampoline handles calls made to Delegate:Invoke ().
1065 * This is called once the first time a delegate is invoked, so it must be fast.
1068 mono_delegate_trampoline (mgreg_t *regs, guint8 *code, gpointer *arg, guint8* tramp)
1070 MonoDomain *domain = mono_domain_get ();
1071 MonoDelegate *delegate;
1074 MonoMethod *method = NULL;
1076 gboolean multicast, callvirt = FALSE, closed_over_null = FALSE;
1077 gboolean need_rgctx_tramp = FALSE;
1078 gboolean need_unbox_tramp = FALSE;
1079 gboolean enable_caching = TRUE;
1080 MonoDelegateTrampInfo *tramp_info = (MonoDelegateTrampInfo*)arg;
1081 MonoMethod *invoke = tramp_info->invoke;
1082 guint8 *impl_this = (guint8 *)tramp_info->impl_this;
1083 guint8 *impl_nothis = (guint8 *)tramp_info->impl_nothis;
1085 MonoMethodSignature *sig;
1086 gpointer addr, compiled_method;
1087 gboolean is_remote = FALSE;
1089 trampoline_calls ++;
1091 /* Obtain the delegate object according to the calling convention */
1092 delegate = (MonoDelegate *)mono_arch_get_this_arg_from_call (regs, code);
1093 g_assert (mono_class_has_parent (mono_object_class (delegate), mono_defaults.multicastdelegate_class));
1095 if (delegate->method) {
1096 method = delegate->method;
1099 * delegate->method_ptr == NULL means the delegate was initialized by
1100 * mini_delegate_ctor, while != NULL means it is initialized by
1101 * mono_delegate_ctor_with_method (). In both cases, we need to add wrappers
1102 * (ctor_with_method () does this, but it doesn't store the wrapper back into
1103 * delegate->method).
1105 #ifndef DISABLE_REMOTING
1106 if (delegate->target && delegate->target->vtable->klass == mono_defaults.transparent_proxy_class) {
1109 if (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class != mono_class_get_com_object_class () &&
1110 !mono_class_is_com_object (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class))
1112 method = mono_marshal_get_remoting_invoke (method);
1116 sig = tramp_info->sig;
1117 if (!(sig && method == tramp_info->method)) {
1118 mono_error_init (&err);
1119 sig = mono_method_signature_checked (method, &err);
1121 mono_error_set_pending_exception (&err);
1126 if (sig->hasthis && method->klass->valuetype) {
1127 gboolean need_unbox = TRUE;
1129 if (tramp_info->invoke_sig->param_count > sig->param_count && tramp_info->invoke_sig->params [0]->byref)
1134 need_unbox_tramp = TRUE;
1136 method = mono_marshal_get_unbox_wrapper (method);
1140 // If "delegate->method_ptr" is null mono_get_addr_from_ftnptr will fail if
1141 // ftnptrs are being used. "method" would end up null on archtitectures without
1142 // ftnptrs so we can just skip this.
1143 } else if (delegate->method_ptr) {
1144 ji = mono_jit_info_table_find (domain, (char *)mono_get_addr_from_ftnptr (delegate->method_ptr));
1146 method = jinfo_get_method (ji);
1150 sig = tramp_info->sig;
1151 if (!(sig && method == tramp_info->method)) {
1152 mono_error_init (&err);
1153 sig = mono_method_signature_checked (method, &err);
1155 mono_error_set_pending_exception (&err);
1160 callvirt = !delegate->target && sig->hasthis;
1162 closed_over_null = tramp_info->invoke_sig->param_count == sig->param_count;
1164 if (callvirt && !closed_over_null) {
1166 * The delegate needs to make a virtual call to the target method using its
1167 * first argument as the receiver. This is hard to support in full-aot, so
1168 * optimize it in some cases if possible.
1169 * If the target method is not virtual or is in a sealed class,
1170 * the vcall will call it directly.
1171 * If the call doesn't return a valuetype, then the vcall uses the same calling
1172 * convention as a normal call.
1174 if (((method->klass->flags & TYPE_ATTRIBUTE_SEALED) || !(method->flags & METHOD_ATTRIBUTE_VIRTUAL)) && !MONO_TYPE_ISSTRUCT (sig->ret)) {
1176 enable_caching = FALSE;
1180 if (delegate->target &&
1181 method->flags & METHOD_ATTRIBUTE_VIRTUAL &&
1182 method->flags & METHOD_ATTRIBUTE_ABSTRACT &&
1183 method->klass->flags & TYPE_ATTRIBUTE_ABSTRACT) {
1184 method = mono_object_get_virtual_method (delegate->target, method);
1185 enable_caching = FALSE;
1188 if (method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
1189 method = mono_marshal_get_synchronized_wrapper (method);
1191 if (method == tramp_info->method)
1192 need_rgctx_tramp = tramp_info->need_rgctx_tramp;
1193 else if (mono_method_needs_static_rgctx_invoke (method, FALSE))
1194 need_rgctx_tramp = TRUE;
1198 * If the called address is a trampoline, replace it with the compiled method so
1199 * further calls don't have to go through the trampoline.
1201 if (method && !callvirt) {
1202 /* Avoid the overhead of looking up an already compiled method if possible */
1203 if (enable_caching && delegate->method_code && *delegate->method_code) {
1204 delegate->method_ptr = *delegate->method_code;
1206 compiled_method = addr = mono_jit_compile_method (method, &error);
1207 if (!mono_error_ok (&error)) {
1208 mono_error_set_pending_exception (&error);
1211 addr = mini_add_method_trampoline (method, compiled_method, need_rgctx_tramp, need_unbox_tramp);
1212 delegate->method_ptr = addr;
1213 if (enable_caching && delegate->method_code)
1214 *delegate->method_code = (guint8 *)delegate->method_ptr;
1217 if (need_rgctx_tramp)
1218 delegate->method_ptr = mono_create_static_rgctx_trampoline (method, delegate->method_ptr);
1221 /* Necessary for !code condition to fallback to slow path */
1224 multicast = ((MonoMulticastDelegate*)delegate)->delegates != NULL;
1225 if (!multicast && !callvirt) {
1226 if (method && (method->flags & METHOD_ATTRIBUTE_STATIC) && mono_method_signature (method)->param_count == mono_method_signature (invoke)->param_count + 1)
1227 /* Closed static delegate */
1230 code = delegate->target ? impl_this : impl_nothis;
1234 /* The general, unoptimized case */
1235 m = mono_marshal_get_delegate_invoke (invoke, delegate);
1236 code = (guint8 *)mono_jit_compile_method (m, &error);
1237 if (!mono_error_ok (&error)) {
1238 mono_error_set_pending_exception (&error);
1241 code = (guint8 *)mini_add_method_trampoline (m, code, mono_method_needs_static_rgctx_invoke (m, FALSE), FALSE);
1244 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
1245 if (enable_caching && !callvirt && tramp_info->method) {
1246 tramp_info->method_ptr = delegate->method_ptr;
1247 tramp_info->invoke_impl = delegate->invoke_impl;
1253 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1255 mono_handler_block_guard_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_info, guint8* tramp)
1259 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_native_tls_get_value (mono_jit_tls_id);
1260 gpointer resume_ip = jit_tls->handler_block_return_address;
1262 memcpy (&ctx, &jit_tls->handler_block_context, sizeof (MonoContext));
1263 MONO_CONTEXT_SET_IP (&ctx, jit_tls->handler_block_return_address);
1265 jit_tls->handler_block_return_address = NULL;
1266 jit_tls->handler_block = NULL;
1268 if (!resume_ip) /*this should not happen, but we should avoid crashing */
1269 exc = mono_get_exception_execution_engine ("Invalid internal state, resuming abort after handler block but no resume ip found");
1271 exc = mono_thread_resume_interruption ();
1274 mono_handle_exception (&ctx, (MonoObject *)exc);
1275 mono_restore_context (&ctx);
1282 mono_create_handler_block_trampoline (void)
1284 static gpointer code;
1286 mono_memory_barrier ();
1290 g_assert (!mono_aot_only);
1292 mono_trampolines_lock ();
1295 MonoTrampInfo *info;
1298 tmp = mono_arch_create_handler_block_trampoline (&info, FALSE);
1299 mono_tramp_info_register (info, NULL);
1300 mono_memory_barrier ();
1303 mono_trampolines_unlock ();
1310 * mono_get_trampoline_func:
1312 * Return the C function which needs to be called by the generic trampoline of type
1316 mono_get_trampoline_func (MonoTrampolineType tramp_type)
1318 switch (tramp_type) {
1319 case MONO_TRAMPOLINE_JIT:
1320 case MONO_TRAMPOLINE_JUMP:
1321 return mono_magic_trampoline;
1322 case MONO_TRAMPOLINE_RGCTX_LAZY_FETCH:
1323 return mono_rgctx_lazy_fetch_trampoline;
1324 #ifdef MONO_ARCH_AOT_SUPPORTED
1325 case MONO_TRAMPOLINE_AOT:
1326 return mono_aot_trampoline;
1327 case MONO_TRAMPOLINE_AOT_PLT:
1328 return mono_aot_plt_trampoline;
1330 case MONO_TRAMPOLINE_DELEGATE:
1331 return mono_delegate_trampoline;
1332 case MONO_TRAMPOLINE_RESTORE_STACK_PROT:
1333 return mono_altstack_restore_prot;
1334 #ifndef DISABLE_REMOTING
1335 case MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING:
1336 return mono_generic_virtual_remoting_trampoline;
1338 case MONO_TRAMPOLINE_VCALL:
1339 return mono_vcall_trampoline;
1340 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1341 case MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD:
1342 return mono_handler_block_guard_trampoline;
1345 g_assert_not_reached ();
1351 create_trampoline_code (MonoTrampolineType tramp_type)
1353 MonoTrampInfo *info;
1356 code = mono_arch_create_generic_trampoline (tramp_type, &info, FALSE);
1357 mono_tramp_info_register (info, NULL);
1363 mono_trampolines_init (void)
1365 mono_os_mutex_init_recursive (&trampolines_mutex);
1370 mono_trampoline_code [MONO_TRAMPOLINE_JIT] = create_trampoline_code (MONO_TRAMPOLINE_JIT);
1371 mono_trampoline_code [MONO_TRAMPOLINE_JUMP] = create_trampoline_code (MONO_TRAMPOLINE_JUMP);
1372 mono_trampoline_code [MONO_TRAMPOLINE_RGCTX_LAZY_FETCH] = create_trampoline_code (MONO_TRAMPOLINE_RGCTX_LAZY_FETCH);
1373 #ifdef MONO_ARCH_AOT_SUPPORTED
1374 mono_trampoline_code [MONO_TRAMPOLINE_AOT] = create_trampoline_code (MONO_TRAMPOLINE_AOT);
1375 mono_trampoline_code [MONO_TRAMPOLINE_AOT_PLT] = create_trampoline_code (MONO_TRAMPOLINE_AOT_PLT);
1377 mono_trampoline_code [MONO_TRAMPOLINE_DELEGATE] = create_trampoline_code (MONO_TRAMPOLINE_DELEGATE);
1378 mono_trampoline_code [MONO_TRAMPOLINE_RESTORE_STACK_PROT] = create_trampoline_code (MONO_TRAMPOLINE_RESTORE_STACK_PROT);
1379 #ifndef DISABLE_REMOTING
1380 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING);
1382 mono_trampoline_code [MONO_TRAMPOLINE_VCALL] = create_trampoline_code (MONO_TRAMPOLINE_VCALL);
1383 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1384 mono_trampoline_code [MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD] = create_trampoline_code (MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD);
1385 mono_create_handler_block_trampoline ();
1388 mono_counters_register ("Calls to trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &trampoline_calls);
1389 mono_counters_register ("JIT trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &jit_trampolines);
1390 mono_counters_register ("Unbox trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &unbox_trampolines);
1391 mono_counters_register ("Static rgctx trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &static_rgctx_trampolines);
1395 mono_trampolines_cleanup (void)
1397 if (rgctx_lazy_fetch_trampoline_hash)
1398 g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash);
1399 if (rgctx_lazy_fetch_trampoline_hash_addr)
1400 g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash_addr);
1402 mono_os_mutex_destroy (&trampolines_mutex);
1406 mono_get_trampoline_code (MonoTrampolineType tramp_type)
1408 g_assert (mono_trampoline_code [tramp_type]);
1410 return mono_trampoline_code [tramp_type];
1414 mono_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
1417 return mono_aot_create_specific_trampoline (mono_defaults.corlib, arg1, tramp_type, domain, code_len);
1419 return mono_arch_create_specific_trampoline (arg1, tramp_type, domain, code_len);
1423 mono_create_jump_trampoline (MonoDomain *domain, MonoMethod *method, gboolean add_sync_wrapper, MonoError *error)
1427 guint32 code_size = 0;
1429 mono_error_init (error);
1431 code = mono_jit_find_compiled_method_with_jit_info (domain, method, &ji);
1433 * We cannot recover the correct type of a shared generic
1434 * method from its native code address, so we use the
1435 * trampoline instead.
1436 * For synchronized methods, the trampoline adds the wrapper.
1438 if (code && !ji->has_generic_jit_info && !(method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED))
1441 if (mono_llvm_only) {
1442 code = mono_jit_compile_method (method, error);
1443 if (!mono_error_ok (error))
1448 mono_domain_lock (domain);
1449 code = g_hash_table_lookup (domain_jit_info (domain)->jump_trampoline_hash, method);
1450 mono_domain_unlock (domain);
1454 code = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JUMP, mono_domain_get (), &code_size);
1455 g_assert (code_size);
1457 ji = (MonoJitInfo *)mono_domain_alloc0 (domain, MONO_SIZEOF_JIT_INFO);
1458 ji->code_start = code;
1459 ji->code_size = code_size;
1460 ji->d.method = method;
1463 * mono_delegate_ctor needs to find the method metadata from the
1464 * trampoline address, so we save it here.
1467 mono_jit_info_table_add (domain, ji);
1469 mono_domain_lock (domain);
1470 g_hash_table_insert (domain_jit_info (domain)->jump_trampoline_hash, method, ji->code_start);
1471 mono_domain_unlock (domain);
1473 return ji->code_start;
1477 method_not_found (void)
1479 g_assert_not_reached ();
1483 mono_create_jit_trampoline (MonoDomain *domain, MonoMethod *method, MonoError *error)
1487 mono_error_init (error);
1489 if (mono_aot_only) {
1490 /* Avoid creating trampolines if possible */
1491 gpointer code = mono_jit_find_compiled_method (domain, method);
1495 if (mono_llvm_only) {
1496 if (method->wrapper_type == MONO_WRAPPER_PROXY_ISINST || method->wrapper_type == MONO_WRAPPER_LDFLD_REMOTE ||
1497 method->wrapper_type == MONO_WRAPPER_STFLD_REMOTE)
1498 /* These wrappers are not generated */
1499 return method_not_found;
1500 /* Methods are lazily initialized on first call, so this can't lead recursion */
1501 code = mono_jit_compile_method (method, error);
1502 if (!mono_error_ok (error))
1508 mono_domain_lock (domain);
1509 tramp = g_hash_table_lookup (domain_jit_info (domain)->jit_trampoline_hash, method);
1510 mono_domain_unlock (domain);
1514 tramp = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JIT, domain, NULL);
1516 mono_domain_lock (domain);
1517 g_hash_table_insert (domain_jit_info (domain)->jit_trampoline_hash, method, tramp);
1518 mono_domain_unlock (domain);
1526 mono_create_jit_trampoline_from_token (MonoImage *image, guint32 token)
1530 MonoDomain *domain = mono_domain_get ();
1531 guint8 *buf, *start;
1533 buf = start = (guint8 *)mono_domain_alloc0 (domain, 2 * sizeof (gpointer));
1535 *(gpointer*)(gpointer)buf = image;
1536 buf += sizeof (gpointer);
1537 *(guint32*)(gpointer)buf = token;
1539 tramp = mono_create_specific_trampoline (start, MONO_TRAMPOLINE_AOT, domain, NULL);
1548 * mono_create_delegate_trampoline_info:
1550 * Create a trampoline info structure for the KLASS+METHOD pair.
1552 MonoDelegateTrampInfo*
1553 mono_create_delegate_trampoline_info (MonoDomain *domain, MonoClass *klass, MonoMethod *method)
1557 MonoDelegateTrampInfo *tramp_info;
1558 MonoClassMethodPair pair, *dpair;
1559 guint32 code_size = 0;
1562 pair.method = method;
1563 mono_domain_lock (domain);
1564 tramp_info = (MonoDelegateTrampInfo *)g_hash_table_lookup (domain_jit_info (domain)->delegate_trampoline_hash, &pair);
1565 mono_domain_unlock (domain);
1569 invoke = mono_get_delegate_invoke (klass);
1572 tramp_info = (MonoDelegateTrampInfo *)mono_domain_alloc0 (domain, sizeof (MonoDelegateTrampInfo));
1573 tramp_info->invoke = invoke;
1574 tramp_info->invoke_sig = mono_method_signature (invoke);
1575 tramp_info->impl_this = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), TRUE);
1576 tramp_info->impl_nothis = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), FALSE);
1577 tramp_info->method = method;
1579 mono_error_init (&error);
1580 tramp_info->sig = mono_method_signature_checked (method, &error);
1581 tramp_info->need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (method, FALSE);
1583 tramp_info->invoke_impl = mono_create_specific_trampoline (tramp_info, MONO_TRAMPOLINE_DELEGATE, domain, &code_size);
1584 g_assert (code_size);
1586 dpair = (MonoClassMethodPair *)mono_domain_alloc0 (domain, sizeof (MonoClassMethodPair));
1587 memcpy (dpair, &pair, sizeof (MonoClassMethodPair));
1589 /* store trampoline address */
1590 mono_domain_lock (domain);
1591 g_hash_table_insert (domain_jit_info (domain)->delegate_trampoline_hash, dpair, tramp_info);
1592 mono_domain_unlock (domain);
1598 no_delegate_trampoline (void)
1600 g_assert_not_reached ();
1604 mono_create_delegate_trampoline (MonoDomain *domain, MonoClass *klass)
1607 return no_delegate_trampoline;
1609 return mono_create_delegate_trampoline_info (domain, klass, NULL)->invoke_impl;
1613 mono_create_delegate_virtual_trampoline (MonoDomain *domain, MonoClass *klass, MonoMethod *method)
1615 MonoMethod *invoke = mono_get_delegate_invoke (klass);
1618 return mono_get_delegate_virtual_invoke_impl (mono_method_signature (invoke), method);
1622 mono_create_rgctx_lazy_fetch_trampoline (guint32 offset)
1624 static gboolean inited = FALSE;
1625 static int num_trampolines = 0;
1626 MonoTrampInfo *info;
1628 gpointer tramp, ptr;
1630 mono_trampolines_lock ();
1631 if (rgctx_lazy_fetch_trampoline_hash)
1632 tramp = g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset));
1635 mono_trampolines_unlock ();
1639 if (mono_aot_only) {
1640 ptr = mono_aot_get_lazy_fetch_trampoline (offset);
1642 tramp = mono_arch_create_rgctx_lazy_fetch_trampoline (offset, &info, FALSE);
1643 mono_tramp_info_register (info, NULL);
1644 ptr = mono_create_ftnptr (mono_get_root_domain (), tramp);
1647 mono_trampolines_lock ();
1648 if (!rgctx_lazy_fetch_trampoline_hash) {
1649 rgctx_lazy_fetch_trampoline_hash = g_hash_table_new (NULL, NULL);
1650 rgctx_lazy_fetch_trampoline_hash_addr = g_hash_table_new (NULL, NULL);
1652 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset), ptr);
1653 g_assert (offset != -1);
1654 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash_addr, ptr, GUINT_TO_POINTER (offset + 1));
1655 mono_trampolines_unlock ();
1658 mono_counters_register ("RGCTX num lazy fetch trampolines",
1659 MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_trampolines);
1668 mono_find_rgctx_lazy_fetch_trampoline_by_addr (gconstpointer addr)
1672 mono_trampolines_lock ();
1673 if (rgctx_lazy_fetch_trampoline_hash_addr) {
1674 /* We store the real offset + 1 so we can detect when the lookup fails */
1675 offset = GPOINTER_TO_INT (g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash_addr, addr));
1683 mono_trampolines_unlock ();
1687 static const char*tramp_names [MONO_TRAMPOLINE_NUM] = {
1694 "restore_stack_prot",
1695 "generic_virtual_remoting",
1697 "handler_block_guard"
1701 * mono_get_generic_trampoline_simple_name:
1705 mono_get_generic_trampoline_simple_name (MonoTrampolineType tramp_type)
1707 return tramp_names [tramp_type];
1711 * mono_get_generic_trampoline_name:
1713 * Returns a pointer to malloc-ed memory.
1716 mono_get_generic_trampoline_name (MonoTrampolineType tramp_type)
1718 return g_strdup_printf ("generic_trampoline_%s", tramp_names [tramp_type]);
1722 * mono_get_rgctx_fetch_trampoline_name:
1724 * Returns a pointer to malloc-ed memory.
1727 mono_get_rgctx_fetch_trampoline_name (int slot)
1732 mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
1733 index = MONO_RGCTX_SLOT_INDEX (slot);
1735 return g_strdup_printf ("rgctx_fetch_trampoline_%s_%d", mrgctx ? "mrgctx" : "rgctx", index);
1739 * mini_get_single_step_trampoline:
1741 * Return a trampoline which calls debugger_agent_single_step_from_context ().
1744 mini_get_single_step_trampoline (void)
1746 static gpointer trampoline;
1751 if (mono_aot_only) {
1752 tramp = mono_aot_get_trampoline ("sdb_single_step_trampoline");
1754 #ifdef MONO_ARCH_HAVE_SDB_TRAMPOLINES
1755 MonoTrampInfo *info;
1756 tramp = mono_arch_create_sdb_trampoline (TRUE, &info, FALSE);
1757 mono_tramp_info_register (info, NULL);
1760 g_assert_not_reached ();
1763 mono_memory_barrier ();
1771 * mini_get_breakpoint_trampoline:
1773 * Return a trampoline which calls debugger_agent_breakpoint_from_context ().
1776 mini_get_breakpoint_trampoline (void)
1778 static gpointer trampoline;
1783 if (mono_aot_only) {
1784 tramp = mono_aot_get_trampoline ("sdb_breakpoint_trampoline");
1786 #ifdef MONO_ARCH_HAVE_SDB_TRAMPOLINES
1787 MonoTrampInfo *info;
1788 tramp = mono_arch_create_sdb_trampoline (FALSE, &info, FALSE);
1789 mono_tramp_info_register (info, NULL);
1792 g_assert_not_reached ();
1795 mono_memory_barrier ();