5 #include <mono/metadata/appdomain.h>
6 #include <mono/metadata/metadata-internals.h>
7 #include <mono/metadata/marshal.h>
8 #include <mono/metadata/tabledefs.h>
9 #include <mono/utils/mono-counters.h>
10 #include <mono/utils/mono-error-internals.h>
13 #include "debug-mini.h"
16 * Address of the trampoline code. This is used by the debugger to check
17 * whether a method is a trampoline.
19 guint8* mono_trampoline_code [MONO_TRAMPOLINE_NUM];
21 static GHashTable *class_init_hash_addr = NULL;
22 static GHashTable *rgctx_lazy_fetch_trampoline_hash = NULL;
23 static GHashTable *rgctx_lazy_fetch_trampoline_hash_addr = NULL;
24 static guint32 trampoline_calls;
26 #define mono_trampolines_lock() EnterCriticalSection (&trampolines_mutex)
27 #define mono_trampolines_unlock() LeaveCriticalSection (&trampolines_mutex)
28 static CRITICAL_SECTION trampolines_mutex;
31 get_unbox_trampoline (MonoGenericSharingContext *gsctx, MonoMethod *m, gpointer addr, gboolean need_rgctx_tramp)
36 * The unbox trampolines call the method directly, so need to add
37 * an rgctx tramp before them.
39 return mono_create_static_rgctx_trampoline (m, mono_aot_get_unbox_trampoline (m));
41 return mono_aot_get_unbox_trampoline (m);
43 return mono_arch_get_unbox_trampoline (gsctx, m, addr);
47 #ifdef MONO_ARCH_HAVE_STATIC_RGCTX_TRAMPOLINE
55 rgctx_tramp_info_equal (gconstpointer ka, gconstpointer kb)
57 const RgctxTrampInfo *i1 = ka;
58 const RgctxTrampInfo *i2 = kb;
60 if (i1->m == i2->m && i1->addr == i2->addr)
67 rgctx_tramp_info_hash (gconstpointer data)
69 const RgctxTrampInfo *info = data;
71 return GPOINTER_TO_UINT (info->m) ^ GPOINTER_TO_UINT (info->addr);
75 * mono_create_static_rgctx_trampoline:
77 * Return a static rgctx trampoline for M which branches to ADDR which should
78 * point to the compiled code of M.
80 * Static rgctx trampolines are used when a shared generic method which doesn't
81 * have a this argument is called indirectly, ie. from code which can't pass in
82 * the rgctx argument. The trampoline sets the rgctx argument and jumps to the
83 * methods code. These trampolines are similar to the unbox trampolines, they
84 * perform the same task as the static rgctx wrappers, but they are smaller/faster,
85 * and can be made to work with full AOT.
86 * On PPC addr should be an ftnptr and the return value is an ftnptr too.
89 mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr)
94 RgctxTrampInfo tmp_info;
97 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
98 g_assert (((gpointer*)addr) [2] == 0);
101 if (mini_method_get_context (m)->method_inst)
102 ctx = mono_method_lookup_rgctx (mono_class_vtable (mono_domain_get (), m->klass), mini_method_get_context (m)->method_inst);
104 ctx = mono_class_vtable (mono_domain_get (), m->klass);
106 domain = mono_domain_get ();
109 * In the AOT case, addr might point to either the method, or to an unbox trampoline,
110 * so make the hash keyed on the m+addr pair.
112 mono_domain_lock (domain);
113 if (!domain_jit_info (domain)->static_rgctx_trampoline_hash)
114 domain_jit_info (domain)->static_rgctx_trampoline_hash = g_hash_table_new (rgctx_tramp_info_hash, rgctx_tramp_info_equal);
116 tmp_info.addr = addr;
117 res = g_hash_table_lookup (domain_jit_info (domain)->static_rgctx_trampoline_hash,
119 mono_domain_unlock (domain);
124 res = mono_aot_get_static_rgctx_trampoline (ctx, addr);
126 res = mono_arch_get_static_rgctx_trampoline (m, ctx, addr);
128 mono_domain_lock (domain);
129 /* Duplicates inserted while we didn't hold the lock are OK */
130 info = mono_domain_alloc (domain, sizeof (RgctxTrampInfo));
133 g_hash_table_insert (domain_jit_info (domain)->static_rgctx_trampoline_hash, info, res);
134 mono_domain_unlock (domain);
140 mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr)
143 * This shouldn't happen as all arches which support generic sharing support
144 * static rgctx trampolines as well.
146 g_assert_not_reached ();
151 mono_get_vcall_slot_addr (guint8* code, mgreg_t *regs)
155 vt = mono_arch_get_vcall_slot (code, regs, &displacement);
158 return (gpointer*)((char*)vt + displacement);
161 #ifdef MONO_ARCH_HAVE_IMT
164 mono_convert_imt_slot_to_vtable_slot (gpointer* slot, mgreg_t *regs, guint8 *code, MonoMethod *method, MonoMethod **impl_method, gboolean *need_rgctx_tramp, gboolean *variance_used)
166 MonoObject *this_argument = mono_arch_get_this_arg_from_call (NULL, mono_method_signature (method), regs, code);
167 MonoVTable *vt = this_argument->vtable;
168 int displacement = slot - ((gpointer*)vt);
170 if (displacement > 0) {
171 /* slot is in the vtable, not in the IMT */
173 printf ("mono_convert_imt_slot_to_vtable_slot: slot %p is in the vtable, not in the IMT\n", slot);
177 MonoMethod *imt_method = mono_arch_find_imt_method (regs, code);
178 int interface_offset;
179 int imt_slot = MONO_IMT_SIZE + displacement;
181 /*This has to be variance aware since imt_method can be from an interface that vt->klass doesn't directly implement*/
182 interface_offset = mono_class_interface_offset_with_variance (vt->klass, imt_method->klass, variance_used);
184 if (interface_offset < 0) {
185 g_error ("%s doesn't implement interface %s\n", mono_type_get_name_full (&vt->klass->byval_arg, 0), mono_type_get_name_full (&imt_method->klass->byval_arg, 0));
187 mono_vtable_build_imt_slot (vt, mono_method_get_imt_slot (imt_method));
192 if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) {
193 MonoGenericContext context = { NULL, NULL };
196 * Generic virtual method, imt_method contains the inflated interface
197 * method, need to get the inflated impl method.
199 /* imt_method->slot might not be set */
200 impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_declaring_generic_method (imt_method)->slot);
202 if (impl->klass->generic_class)
203 context.class_inst = impl->klass->generic_class->context.class_inst;
204 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
205 impl = mono_class_inflate_generic_method (impl, &context);
207 impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_vtable_slot (imt_method));
210 if (mono_method_needs_static_rgctx_invoke (impl, FALSE))
211 *need_rgctx_tramp = TRUE;
215 printf ("mono_convert_imt_slot_to_vtable_slot: method = %s.%s.%s, imt_method = %s.%s.%s\n",
216 method->klass->name_space, method->klass->name, method->name,
217 imt_method->klass->name_space, imt_method->klass->name, imt_method->name);
220 g_assert (imt_slot < MONO_IMT_SIZE);
221 if (vt->imt_collisions_bitmap & (1 << imt_slot)) {
222 int slot = mono_method_get_vtable_index (imt_method);
224 gpointer *vtable_slot;
226 g_assert (slot != -1);
227 vtable_offset = interface_offset + slot;
228 vtable_slot = & (vt->vtable [vtable_offset]);
230 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);
235 printf ("mono_convert_imt_slot_to_vtable_slot: slot %p[%d] is in the IMT, but not colliding\n", slot, imt_slot);
244 * common_call_trampoline:
246 * The code to handle normal, virtual, and interface method calls and jumps, both
247 * from JITted and LLVM compiled code.
250 common_call_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp, MonoVTable *vt, gpointer *vtable_slot, gboolean need_rgctx_tramp)
252 gpointer addr, compiled_method;
253 gboolean generic_shared = FALSE;
255 MonoMethod *declaring = NULL;
256 MonoMethod *generic_virtual = NULL, *variant_iface = NULL;
258 gboolean proxy = FALSE, variance_used = FALSE;
259 gpointer *orig_vtable_slot;
260 MonoJitInfo *ji = NULL;
264 orig_vtable_slot = vtable_slot;
266 if (m == MONO_FAKE_VTABLE_METHOD) {
272 ji = mono_jit_info_table_find (mono_domain_get (), (char*)code);
274 printf ("Caller: %s\n", mono_method_full_name (ji->method, TRUE));
275 /* Print some debug info */
276 for (i = 0; i < 32; ++i)
277 printf ("0x%x ", code [-32 + i]);
281 displacement = (guint8*)vtable_slot - (guint8*)vt;
282 if (displacement > 0) {
283 int slot = (displacement - G_STRUCT_OFFSET (MonoVTable, vtable)) / sizeof (gpointer);
284 g_assert (slot >= 0);
286 /* Avoid loading metadata or creating a generic vtable if possible */
287 addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, slot);
289 addr = mono_create_ftnptr (mono_domain_get (), addr);
290 if (addr && !vt->klass->valuetype) {
291 vtable_slot = mono_get_vcall_slot_addr (code, regs);
292 if (mono_aot_is_got_entry (code, (guint8*)vtable_slot) || mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot)) {
293 *vtable_slot = mono_get_addr_from_ftnptr (addr);
299 m = mono_class_get_vtable_entry (vt->klass, slot);
300 if (mono_method_needs_static_rgctx_invoke (m, FALSE))
301 need_rgctx_tramp = TRUE;
303 /*g_print ("%s with disp %d: %s at %p\n", vt->klass->name, displacement, m->name, code);*/
305 /* We got here from an interface method: redirect to IMT handling */
306 m = MONO_FAKE_IMT_METHOD;
307 /*g_print ("vtable with disp %d at %p\n", displacement, code);*/
311 /* this is the IMT trampoline */
312 #ifdef MONO_ARCH_HAVE_IMT
313 if (m == MONO_FAKE_IMT_METHOD) {
314 MonoMethod *impl_method;
315 MonoObject *this_arg;
317 /* we get the interface method because mono_convert_imt_slot_to_vtable_slot ()
318 * needs the signature to be able to find the this argument
320 m = mono_arch_find_imt_method (regs, code);
321 vtable_slot = orig_vtable_slot;
322 g_assert (vtable_slot);
324 this_arg = mono_arch_get_this_arg_from_call (NULL, mono_method_signature (m), regs, code);
326 if (this_arg->vtable->klass == mono_defaults.transparent_proxy_class) {
327 /* Use the slow path for now */
329 m = mono_object_get_virtual_method (this_arg, m);
331 vtable_slot = mono_convert_imt_slot_to_vtable_slot (vtable_slot, regs, code, m, &impl_method, &need_rgctx_tramp, &variance_used);
332 /* mono_convert_imt_slot_to_vtable_slot () also gives us the method that is supposed
333 * to be called, so we compile it and go ahead as usual.
335 /*g_print ("imt found method %p (%s) at %p\n", impl_method, impl_method->name, code);*/
336 if (m->is_inflated && ((MonoMethodInflated*)m)->context.method_inst) {
337 /* Generic virtual method */
339 need_rgctx_tramp = TRUE;
340 } else if (variance_used && mono_class_has_variant_generic_params (m->klass)) {
348 #ifdef MONO_ARCH_LLVM_SUPPORTED
349 if (!vtable_slot && code && !need_rgctx_tramp && mono_method_needs_static_rgctx_invoke (m, FALSE)) {
351 * Call this only if the called method is shared, cause it is slow/loads a lot of
354 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
355 if (ji && ji->from_llvm) {
356 /* LLVM can't pass an rgctx arg */
357 need_rgctx_tramp = TRUE;
363 MonoGenericContext context = { NULL, NULL };
364 MonoMethod *declaring;
367 declaring = mono_method_get_declaring_generic_method (m);
371 if (m->klass->generic_class)
372 context.class_inst = m->klass->generic_class->context.class_inst;
374 g_assert (!m->klass->generic_container);
376 #ifdef MONO_ARCH_HAVE_IMT
377 generic_virtual = mono_arch_find_imt_method (regs, code);
379 if (generic_virtual) {
380 g_assert (generic_virtual->is_inflated);
381 context.method_inst = ((MonoMethodInflated*)generic_virtual)->context.method_inst;
384 m = mono_class_inflate_generic_method (declaring, &context);
385 /* FIXME: only do this if the method is sharable */
386 need_rgctx_tramp = TRUE;
387 } else if ((context_used = mono_method_check_context_used (m))) {
388 MonoClass *klass = NULL;
389 MonoMethod *actual_method = NULL;
390 MonoVTable *vt = NULL;
391 MonoGenericInst *method_inst = NULL;
394 generic_shared = TRUE;
398 if (m->is_inflated && mono_method_get_context (m)->method_inst) {
399 #ifdef MONO_ARCH_RGCTX_REG
400 MonoMethodRuntimeGenericContext *mrgctx = (MonoMethodRuntimeGenericContext*)mono_arch_find_static_call_vtable (regs, code);
402 klass = mrgctx->class_vtable->klass;
403 method_inst = mrgctx->method_inst;
405 g_assert_not_reached ();
407 } else if ((m->flags & METHOD_ATTRIBUTE_STATIC) || m->klass->valuetype) {
408 #ifdef MONO_ARCH_RGCTX_REG
409 MonoVTable *vtable = mono_arch_find_static_call_vtable (regs, code);
411 klass = vtable->klass;
413 g_assert_not_reached ();
416 #ifdef MONO_ARCH_HAVE_IMT
417 MonoObject *this_argument = mono_arch_get_this_arg_from_call (NULL, mono_method_signature (m), regs, code);
419 vt = this_argument->vtable;
420 vtable_slot = orig_vtable_slot;
422 g_assert (this_argument->vtable->klass->inited);
423 //mono_class_init (this_argument->vtable->klass);
426 klass = this_argument->vtable->klass->supertypes [m->klass->idepth - 1];
432 g_assert (vtable_slot || klass);
435 int displacement = vtable_slot - ((gpointer*)vt);
437 g_assert_not_reached ();
439 g_assert (displacement > 0);
441 actual_method = vt->klass->vtable [displacement];
445 MonoGenericContext context = { NULL, NULL };
448 declaring = mono_method_get_declaring_generic_method (m);
452 if (klass->generic_class)
453 context.class_inst = klass->generic_class->context.class_inst;
454 else if (klass->generic_container)
455 context.class_inst = klass->generic_container->context.class_inst;
456 context.method_inst = method_inst;
458 actual_method = mono_class_inflate_generic_method (declaring, &context);
460 actual_method = mono_class_get_method_generic (klass, m);
464 g_assert (actual_method);
465 g_assert (actual_method->klass == klass);
467 if (actual_method->is_inflated)
468 declaring = mono_method_get_declaring_generic_method (actual_method);
475 if (m->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) {
479 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
483 /* Avoid recursion */
484 if (!(ji && ji->method->wrapper_type == MONO_WRAPPER_SYNCHRONIZED))
485 m = mono_marshal_get_synchronized_wrapper (m);
488 /* Calls made through delegates on platforms without delegate trampolines */
489 if (!code && mono_method_needs_static_rgctx_invoke (m, FALSE))
490 need_rgctx_tramp = TRUE;
492 addr = compiled_method = mono_compile_method (m);
495 mono_debugger_trampoline_compiled (code, m, addr);
497 if (need_rgctx_tramp)
498 addr = mono_create_static_rgctx_trampoline (m, addr);
500 if (generic_virtual || variant_iface) {
501 MonoMethod *target = generic_virtual ? generic_virtual : variant_iface;
503 vtable_slot = orig_vtable_slot;
504 g_assert (vtable_slot);
506 if (vt->klass->valuetype) /*FIXME is this required variant iface?*/
507 addr = get_unbox_trampoline (mono_get_generic_context_from_code (code), m, addr, need_rgctx_tramp);
509 mono_method_add_generic_virtual_invocation (mono_domain_get (),
516 /* the method was jumped to */
518 MonoDomain *domain = mono_domain_get ();
520 /* Patch the got entries pointing to this method */
522 * We do this here instead of in mono_codegen () to cover the case when m
523 * was loaded from an aot image.
525 if (domain_jit_info (domain)->jump_target_got_slot_hash) {
528 mono_domain_lock (domain);
529 list = g_hash_table_lookup (domain_jit_info (domain)->jump_target_got_slot_hash, m);
531 for (tmp = list; tmp; tmp = tmp->next) {
532 gpointer *got_slot = tmp->data;
535 g_hash_table_remove (domain_jit_info (domain)->jump_target_got_slot_hash, m);
538 mono_domain_unlock (domain);
544 vtable_slot = orig_vtable_slot;
547 gboolean variance_used = FALSE;
548 if (m->klass->valuetype)
549 addr = get_unbox_trampoline (mono_get_generic_context_from_code (code), m, addr, need_rgctx_tramp);
550 g_assert (*vtable_slot);
552 if (!proxy && (mono_aot_is_got_entry (code, (guint8*)vtable_slot) || mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))) {
553 #ifdef MONO_ARCH_HAVE_IMT
554 vtable_slot = mono_convert_imt_slot_to_vtable_slot (vtable_slot, regs, code, m, NULL, &need_rgctx_tramp, &variance_used);
556 *vtable_slot = mono_get_addr_from_ftnptr (addr);
560 guint8 *plt_entry = mono_aot_get_plt_entry (code);
563 mono_aot_patch_plt_entry (plt_entry, NULL, regs, addr);
565 if (generic_shared) {
566 if (m->wrapper_type != MONO_WRAPPER_NONE)
567 m = mono_marshal_method_from_wrapper (m);
568 g_assert (mono_method_is_generic_sharable_impl (m, FALSE));
571 /* Patch calling code */
573 MonoJitInfo *target_ji =
574 mono_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method));
577 ji = mono_jit_info_table_find (mono_domain_get (), (char*)code);
579 if (mono_method_same_domain (ji, target_ji))
580 mono_arch_patch_callsite (ji->code_start, code, addr);
589 * mono_magic_trampoline:
591 * This trampoline handles calls from JITted code.
594 mono_magic_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp)
596 gpointer *vtable_slot;
602 if (code && !mono_use_llvm)
603 vt = mono_arch_get_vcall_slot (code, regs, &displacement);
607 vtable_slot = (gpointer*)((char*)vt + displacement);
611 return common_call_trampoline (regs, code, arg, tramp, vt, vtable_slot, FALSE);
614 #ifdef MONO_ARCH_LLVM_SUPPORTED
616 * mono_llvm_vcall_trampoline:
618 * This trampoline handles virtual calls when using LLVM.
621 mono_llvm_vcall_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8 *tramp)
625 gpointer *vtable_slot;
631 * We have the method which is called, we need to obtain the vtable slot without
632 * disassembly which is impossible with LLVM.
633 * So we use the this argument.
635 this = mono_arch_get_this_arg_from_call (NULL, mono_method_signature (m), regs, code);
638 slot = mono_method_get_vtable_slot (m);
640 g_assert (slot != -1);
642 g_assert (this->vtable->klass->vtable [slot] == m);
646 g_assert (!m->is_generic);
648 vtable_slot = &(vt->vtable [slot]);
650 return common_call_trampoline (regs, code, m, tramp, vt, vtable_slot, mono_method_needs_static_rgctx_invoke (m, 0));
655 mono_generic_virtual_remoting_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8 *tramp)
657 MonoGenericContext context = { NULL, NULL };
658 MonoMethod *imt_method, *declaring;
663 g_assert (m->is_generic);
666 declaring = mono_method_get_declaring_generic_method (m);
670 if (m->klass->generic_class)
671 context.class_inst = m->klass->generic_class->context.class_inst;
673 g_assert (!m->klass->generic_container);
675 #ifdef MONO_ARCH_HAVE_IMT
676 imt_method = mono_arch_find_imt_method (regs, code);
677 if (imt_method->is_inflated)
678 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
680 m = mono_class_inflate_generic_method (declaring, &context);
681 m = mono_marshal_get_remoting_invoke_with_check (m);
683 addr = mono_compile_method (m);
686 mono_debugger_trampoline_compiled (NULL, m, addr);
692 * mono_aot_trampoline:
694 * This trampoline handles calls made from AOT code. We try to bypass the
695 * normal JIT compilation logic to avoid loading the metadata for the method.
697 #ifdef MONO_ARCH_AOT_SUPPORTED
699 mono_aot_trampoline (mgreg_t *regs, guint8 *code, guint8 *token_info,
704 MonoMethod *method = NULL;
706 gpointer *vtable_slot;
711 image = *(gpointer*)(gpointer)token_info;
712 token_info += sizeof (gpointer);
713 token = *(guint32*)(gpointer)token_info;
715 addr = mono_aot_get_method_from_token (mono_domain_get (), image, token);
717 method = mono_get_method (image, token, NULL);
720 /* Use the generic code */
721 return mono_magic_trampoline (regs, code, method, tramp);
724 addr = mono_create_ftnptr (mono_domain_get (), addr);
726 vtable_slot = mono_get_vcall_slot_addr (code, regs);
727 g_assert (!vtable_slot);
729 /* This is a normal call through a PLT entry */
730 plt_entry = mono_aot_get_plt_entry (code);
731 g_assert (plt_entry);
733 mono_aot_patch_plt_entry (plt_entry, NULL, regs, addr);
739 * mono_aot_plt_trampoline:
741 * This trampoline handles calls made from AOT code through the PLT table.
744 mono_aot_plt_trampoline (mgreg_t *regs, guint8 *code, guint8 *aot_module,
747 guint32 plt_info_offset = mono_aot_get_plt_info_offset (regs, code);
752 res = mono_aot_plt_resolve (aot_module, plt_info_offset, code);
754 if (mono_loader_get_last_error ())
755 mono_raise_exception (mono_loader_error_prepare_exception (mono_loader_get_last_error ()));
756 // FIXME: Error handling (how ?)
765 * mono_class_init_trampoline:
767 * This method calls mono_runtime_class_init () to run the static constructor
768 * for the type, then patches the caller code so it is not called again.
771 mono_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp)
773 guint8 *plt_entry = mono_aot_get_plt_entry (code);
777 mono_runtime_class_init (vtable);
780 mono_arch_nullify_plt_entry (plt_entry, regs);
782 mono_arch_nullify_class_init_trampoline (code, regs);
787 * mono_generic_class_init_trampoline:
789 * This method calls mono_runtime_class_init () to run the static constructor
793 mono_generic_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp)
797 mono_runtime_class_init (vtable);
801 mono_rgctx_lazy_fetch_trampoline (mgreg_t *regs, guint8 *code, gpointer data, guint8 *tramp)
803 #ifdef MONO_ARCH_VTABLE_REG
804 static gboolean inited = FALSE;
805 static int num_lookups = 0;
806 guint32 slot = GPOINTER_TO_UINT (data);
807 mgreg_t *r = (mgreg_t*)regs;
808 gpointer arg = (gpointer)(gssize)r [MONO_ARCH_VTABLE_REG];
809 guint32 index = MONO_RGCTX_SLOT_INDEX (slot);
810 gboolean mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
815 mono_counters_register ("RGCTX unmanaged lookups", MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_lookups);
822 return mono_method_fill_runtime_generic_context (arg, index);
824 return mono_class_fill_runtime_generic_context (arg, index);
826 g_assert_not_reached ();
831 mono_monitor_enter_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
833 mono_monitor_enter (obj);
837 mono_monitor_exit_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
839 mono_monitor_exit (obj);
842 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
845 * mono_delegate_trampoline:
847 * This trampoline handles calls made to Delegate:Invoke ().
848 * This is called once the first time a delegate is invoked, so it must be fast.
851 mono_delegate_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp)
853 MonoDomain *domain = mono_domain_get ();
854 MonoDelegate *delegate;
857 MonoMethod *method = NULL;
858 gboolean multicast, callvirt = FALSE;
859 gboolean need_rgctx_tramp = FALSE;
860 MonoMethod *invoke = tramp_data [0];
861 guint8 *impl_this = tramp_data [1];
862 guint8 *impl_nothis = tramp_data [2];
864 MonoMethodSignature *sig;
868 /* Obtain the delegate object according to the calling convention */
871 * Avoid calling mono_get_generic_context_from_code () now since it is expensive,
872 * get_this_arg_from_call will call it if needed.
874 delegate = mono_arch_get_this_arg_from_call (NULL, mono_method_signature (invoke), regs, code);
876 if (delegate->method) {
877 method = delegate->method;
880 * delegate->method_ptr == NULL means the delegate was initialized by
881 * mini_delegate_ctor, while != NULL means it is initialized by
882 * mono_delegate_ctor_with_method (). In both cases, we need to add wrappers
883 * (ctor_with_method () does this, but it doesn't store the wrapper back into
886 if (delegate->target && delegate->target->vtable->klass == mono_defaults.transparent_proxy_class) {
888 if (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class != mono_defaults.com_object_class &&
889 !((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class->is_com_object)
891 method = mono_marshal_get_remoting_invoke (method);
894 mono_error_init (&err);
895 sig = mono_method_signature_checked (method, &err);
897 mono_error_raise_exception (&err);
899 if (sig->hasthis && method->klass->valuetype)
900 method = mono_marshal_get_unbox_wrapper (method);
903 ji = mono_jit_info_table_find (domain, mono_get_addr_from_ftnptr (delegate->method_ptr));
909 mono_error_init (&err);
910 sig = mono_method_signature_checked (method, &err);
912 mono_error_raise_exception (&err);
914 callvirt = !delegate->target && sig->hasthis;
917 if (method && method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
918 method = mono_marshal_get_synchronized_wrapper (method);
920 if (method && mono_method_needs_static_rgctx_invoke (method, FALSE))
921 need_rgctx_tramp = TRUE;
924 * If the called address is a trampoline, replace it with the compiled method so
925 * further calls don't have to go through the trampoline.
927 if (method && !callvirt) {
928 /* Avoid the overhead of looking up an already compiled method if possible */
929 if (delegate->method_code && *delegate->method_code) {
930 delegate->method_ptr = *delegate->method_code;
932 delegate->method_ptr = mono_compile_method (method);
933 if (need_rgctx_tramp)
934 delegate->method_ptr = mono_create_static_rgctx_trampoline (method, delegate->method_ptr);
935 if (delegate->method_code)
936 *delegate->method_code = delegate->method_ptr;
937 mono_debugger_trampoline_compiled (NULL, method, delegate->method_ptr);
940 if (need_rgctx_tramp)
941 delegate->method_ptr = mono_create_static_rgctx_trampoline (method, delegate->method_ptr);
944 multicast = ((MonoMulticastDelegate*)delegate)->prev != NULL;
945 if (!multicast && !callvirt) {
946 if (method && (method->flags & METHOD_ATTRIBUTE_STATIC) && mono_method_signature (method)->param_count == mono_method_signature (invoke)->param_count + 1)
947 /* Closed static delegate */
950 code = delegate->target ? impl_this : impl_nothis;
953 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
958 /* The general, unoptimized case */
959 m = mono_marshal_get_delegate_invoke (invoke, delegate);
960 code = mono_compile_method (m);
961 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
962 mono_debugger_trampoline_compiled (NULL, m, delegate->invoke_impl);
969 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
971 mono_handler_block_guard_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp)
975 MonoJitTlsData *jit_tls = TlsGetValue (mono_jit_tls_id);
976 gpointer resume_ip = jit_tls->handler_block_return_address;
978 memcpy (&ctx, &jit_tls->ex_ctx, sizeof (MonoContext));
979 MONO_CONTEXT_SET_IP (&ctx, jit_tls->handler_block_return_address);
981 jit_tls->handler_block_return_address = NULL;
982 jit_tls->handler_block = NULL;
984 if (!resume_ip) /*this should not happen, but we should avoid crashing */
985 exc = mono_get_exception_execution_engine ("Invalid internal state, resuming abort after handler block but no resume ip found");
987 exc = mono_thread_resume_interruption ();
990 static void (*restore_context) (MonoContext *);
992 if (!restore_context)
993 restore_context = mono_get_restore_context ();
995 mono_handle_exception (&ctx, exc, NULL, FALSE);
996 restore_context (&ctx);
1003 mono_create_handler_block_trampoline (void)
1005 static gpointer code;
1007 if (mono_aot_only) {
1012 mono_trampolines_lock ();
1015 code = mono_arch_create_handler_block_trampoline ();
1017 mono_trampolines_unlock ();
1024 * mono_get_trampoline_func:
1026 * Return the C function which needs to be called by the generic trampoline of type
1030 mono_get_trampoline_func (MonoTrampolineType tramp_type)
1032 switch (tramp_type) {
1033 case MONO_TRAMPOLINE_JIT:
1034 case MONO_TRAMPOLINE_JUMP:
1035 return mono_magic_trampoline;
1036 case MONO_TRAMPOLINE_CLASS_INIT:
1037 return mono_class_init_trampoline;
1038 case MONO_TRAMPOLINE_GENERIC_CLASS_INIT:
1039 return mono_generic_class_init_trampoline;
1040 case MONO_TRAMPOLINE_RGCTX_LAZY_FETCH:
1041 return mono_rgctx_lazy_fetch_trampoline;
1042 #ifdef MONO_ARCH_AOT_SUPPORTED
1043 case MONO_TRAMPOLINE_AOT:
1044 return mono_aot_trampoline;
1045 case MONO_TRAMPOLINE_AOT_PLT:
1046 return mono_aot_plt_trampoline;
1048 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1049 case MONO_TRAMPOLINE_DELEGATE:
1050 return mono_delegate_trampoline;
1052 case MONO_TRAMPOLINE_RESTORE_STACK_PROT:
1053 return mono_altstack_restore_prot;
1054 case MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING:
1055 return mono_generic_virtual_remoting_trampoline;
1056 case MONO_TRAMPOLINE_MONITOR_ENTER:
1057 return mono_monitor_enter_trampoline;
1058 case MONO_TRAMPOLINE_MONITOR_EXIT:
1059 return mono_monitor_exit_trampoline;
1060 #ifdef MONO_ARCH_LLVM_SUPPORTED
1061 case MONO_TRAMPOLINE_LLVM_VCALL:
1062 return mono_llvm_vcall_trampoline;
1064 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1065 case MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD:
1066 return mono_handler_block_guard_trampoline;
1069 g_assert_not_reached ();
1075 create_trampoline_code (MonoTrampolineType tramp_type)
1077 MonoTrampInfo *info;
1080 code = mono_arch_create_generic_trampoline (tramp_type, &info, FALSE);
1082 mono_save_trampoline_xdebug_info (info->name, info->code, info->code_size, info->unwind_ops);
1083 mono_tramp_info_free (info);
1090 mono_trampolines_init (void)
1092 InitializeCriticalSection (&trampolines_mutex);
1097 mono_trampoline_code [MONO_TRAMPOLINE_JIT] = create_trampoline_code (MONO_TRAMPOLINE_JIT);
1098 mono_trampoline_code [MONO_TRAMPOLINE_JUMP] = create_trampoline_code (MONO_TRAMPOLINE_JUMP);
1099 mono_trampoline_code [MONO_TRAMPOLINE_CLASS_INIT] = create_trampoline_code (MONO_TRAMPOLINE_CLASS_INIT);
1100 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_CLASS_INIT] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_CLASS_INIT);
1101 mono_trampoline_code [MONO_TRAMPOLINE_RGCTX_LAZY_FETCH] = create_trampoline_code (MONO_TRAMPOLINE_RGCTX_LAZY_FETCH);
1102 #ifdef MONO_ARCH_AOT_SUPPORTED
1103 mono_trampoline_code [MONO_TRAMPOLINE_AOT] = create_trampoline_code (MONO_TRAMPOLINE_AOT);
1104 mono_trampoline_code [MONO_TRAMPOLINE_AOT_PLT] = create_trampoline_code (MONO_TRAMPOLINE_AOT_PLT);
1106 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1107 mono_trampoline_code [MONO_TRAMPOLINE_DELEGATE] = create_trampoline_code (MONO_TRAMPOLINE_DELEGATE);
1109 mono_trampoline_code [MONO_TRAMPOLINE_RESTORE_STACK_PROT] = create_trampoline_code (MONO_TRAMPOLINE_RESTORE_STACK_PROT);
1110 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING);
1111 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_ENTER] = create_trampoline_code (MONO_TRAMPOLINE_MONITOR_ENTER);
1112 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_EXIT] = create_trampoline_code (MONO_TRAMPOLINE_MONITOR_EXIT);
1113 #ifdef MONO_ARCH_LLVM_SUPPORTED
1114 mono_trampoline_code [MONO_TRAMPOLINE_LLVM_VCALL] = create_trampoline_code (MONO_TRAMPOLINE_LLVM_VCALL);
1116 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1117 mono_trampoline_code [MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD] = create_trampoline_code (MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD);
1118 mono_create_handler_block_trampoline ();
1121 mono_counters_register ("Calls to trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &trampoline_calls);
1125 mono_trampolines_cleanup (void)
1127 if (class_init_hash_addr)
1128 g_hash_table_destroy (class_init_hash_addr);
1130 DeleteCriticalSection (&trampolines_mutex);
1134 mono_get_trampoline_code (MonoTrampolineType tramp_type)
1136 g_assert (mono_trampoline_code [tramp_type]);
1138 return mono_trampoline_code [tramp_type];
1142 mono_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
1145 return mono_aot_create_specific_trampoline (mono_defaults.corlib, arg1, tramp_type, domain, code_len);
1147 return mono_arch_create_specific_trampoline (arg1, tramp_type, domain, code_len);
1151 mono_create_class_init_trampoline (MonoVTable *vtable)
1154 MonoDomain *domain = vtable->domain;
1156 g_assert (!vtable->klass->generic_container);
1158 /* previously created trampoline code */
1159 mono_domain_lock (domain);
1161 g_hash_table_lookup (domain_jit_info (domain)->class_init_trampoline_hash,
1163 mono_domain_unlock (domain);
1167 code = mono_create_specific_trampoline (vtable, MONO_TRAMPOLINE_CLASS_INIT, domain, NULL);
1169 ptr = mono_create_ftnptr (domain, code);
1171 /* store trampoline address */
1172 mono_domain_lock (domain);
1173 g_hash_table_insert (domain_jit_info (domain)->class_init_trampoline_hash,
1175 mono_domain_unlock (domain);
1177 mono_trampolines_lock ();
1178 if (!class_init_hash_addr)
1179 class_init_hash_addr = g_hash_table_new (NULL, NULL);
1180 g_hash_table_insert (class_init_hash_addr, ptr, vtable);
1181 mono_trampolines_unlock ();
1187 mono_create_generic_class_init_trampoline (void)
1189 #ifdef MONO_ARCH_VTABLE_REG
1190 static gpointer code;
1192 mono_trampolines_lock ();
1196 /* get_named_code () might return an ftnptr, but our caller expects a direct pointer */
1197 code = mono_get_addr_from_ftnptr (mono_aot_get_trampoline ("generic_class_init_trampoline"));
1199 code = mono_arch_create_generic_class_init_trampoline (NULL, FALSE);
1202 mono_trampolines_unlock ();
1206 g_assert_not_reached ();
1211 mono_create_jump_trampoline (MonoDomain *domain, MonoMethod *method, gboolean add_sync_wrapper)
1215 guint32 code_size = 0;
1217 code = mono_jit_find_compiled_method_with_jit_info (domain, method, &ji);
1219 * We cannot recover the correct type of a shared generic
1220 * method from its native code address, so we use the
1221 * trampoline instead.
1223 if (code && !ji->has_generic_jit_info)
1226 mono_domain_lock (domain);
1227 code = g_hash_table_lookup (domain_jit_info (domain)->jump_trampoline_hash, method);
1228 mono_domain_unlock (domain);
1232 code = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JUMP, mono_domain_get (), &code_size);
1233 g_assert (code_size);
1235 ji = mono_domain_alloc0 (domain, MONO_SIZEOF_JIT_INFO);
1236 ji->code_start = code;
1237 ji->code_size = code_size;
1238 ji->method = method;
1241 * mono_delegate_ctor needs to find the method metadata from the
1242 * trampoline address, so we save it here.
1245 mono_jit_info_table_add (domain, ji);
1247 mono_domain_lock (domain);
1248 g_hash_table_insert (domain_jit_info (domain)->jump_trampoline_hash, method, ji->code_start);
1249 mono_domain_unlock (domain);
1251 return ji->code_start;
1255 mono_create_jit_trampoline_in_domain (MonoDomain *domain, MonoMethod *method)
1259 if (mono_aot_only) {
1260 /* Avoid creating trampolines if possible */
1261 gpointer code = mono_jit_find_compiled_method (domain, method);
1267 mono_domain_lock (domain);
1268 tramp = g_hash_table_lookup (domain_jit_info (domain)->jit_trampoline_hash, method);
1269 mono_domain_unlock (domain);
1273 tramp = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JIT, domain, NULL);
1275 mono_domain_lock (domain);
1276 g_hash_table_insert (domain_jit_info (domain)->jit_trampoline_hash, method, tramp);
1277 mono_domain_unlock (domain);
1279 mono_jit_stats.method_trampolines++;
1285 mono_create_jit_trampoline (MonoMethod *method)
1287 return mono_create_jit_trampoline_in_domain (mono_domain_get (), method);
1291 mono_create_jit_trampoline_from_token (MonoImage *image, guint32 token)
1295 MonoDomain *domain = mono_domain_get ();
1296 guint8 *buf, *start;
1298 buf = start = mono_domain_code_reserve (domain, 2 * sizeof (gpointer));
1300 *(gpointer*)(gpointer)buf = image;
1301 buf += sizeof (gpointer);
1302 *(guint32*)(gpointer)buf = token;
1304 tramp = mono_create_specific_trampoline (start, MONO_TRAMPOLINE_AOT, domain, NULL);
1306 mono_jit_stats.method_trampolines++;
1312 mono_create_delegate_trampoline (MonoClass *klass)
1314 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1315 MonoDomain *domain = mono_domain_get ();
1317 guint32 code_size = 0;
1318 gpointer *tramp_data;
1321 mono_domain_lock (domain);
1322 ptr = g_hash_table_lookup (domain_jit_info (domain)->delegate_trampoline_hash, klass);
1323 mono_domain_unlock (domain);
1327 // Precompute the delegate invoke impl and pass it to the delegate trampoline
1328 invoke = mono_get_delegate_invoke (klass);
1331 tramp_data = mono_domain_alloc (domain, sizeof (gpointer) * 3);
1332 tramp_data [0] = invoke;
1333 tramp_data [1] = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), TRUE);
1334 tramp_data [2] = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), FALSE);
1336 ptr = mono_create_specific_trampoline (tramp_data, MONO_TRAMPOLINE_DELEGATE, mono_domain_get (), &code_size);
1337 g_assert (code_size);
1339 /* store trampoline address */
1340 mono_domain_lock (domain);
1341 g_hash_table_insert (domain_jit_info (domain)->delegate_trampoline_hash,
1343 mono_domain_unlock (domain);
1352 mono_create_rgctx_lazy_fetch_trampoline (guint32 offset)
1354 static gboolean inited = FALSE;
1355 static int num_trampolines = 0;
1357 gpointer tramp, ptr;
1360 return mono_aot_get_lazy_fetch_trampoline (offset);
1362 mono_trampolines_lock ();
1363 if (rgctx_lazy_fetch_trampoline_hash)
1364 tramp = g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset));
1367 mono_trampolines_unlock ();
1371 tramp = mono_arch_create_rgctx_lazy_fetch_trampoline (offset, NULL, FALSE);
1372 ptr = mono_create_ftnptr (mono_get_root_domain (), tramp);
1374 mono_trampolines_lock ();
1375 if (!rgctx_lazy_fetch_trampoline_hash) {
1376 rgctx_lazy_fetch_trampoline_hash = g_hash_table_new (NULL, NULL);
1377 rgctx_lazy_fetch_trampoline_hash_addr = g_hash_table_new (NULL, NULL);
1379 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset), ptr);
1380 g_assert (offset != -1);
1381 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash_addr, ptr, GUINT_TO_POINTER (offset + 1));
1382 mono_trampolines_unlock ();
1385 mono_counters_register ("RGCTX num lazy fetch trampolines",
1386 MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_trampolines);
1395 mono_create_monitor_enter_trampoline (void)
1397 static gpointer code;
1399 if (mono_aot_only) {
1401 code = mono_aot_get_trampoline ("monitor_enter_trampoline");
1405 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
1406 mono_trampolines_lock ();
1409 code = mono_arch_create_monitor_enter_trampoline (NULL, FALSE);
1411 mono_trampolines_unlock ();
1414 g_assert_not_reached ();
1421 mono_create_monitor_exit_trampoline (void)
1423 static gpointer code;
1425 if (mono_aot_only) {
1427 code = mono_aot_get_trampoline ("monitor_exit_trampoline");
1431 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
1432 mono_trampolines_lock ();
1435 code = mono_arch_create_monitor_exit_trampoline (NULL, FALSE);
1437 mono_trampolines_unlock ();
1440 g_assert_not_reached ();
1445 #ifdef MONO_ARCH_LLVM_SUPPORTED
1447 * mono_create_llvm_vcall_trampoline:
1449 * LLVM emits code for virtual calls which mono_get_vcall_slot is unable to
1450 * decode, i.e. only the final branch address is available:
1451 * mov <offset>(%rax), %rax
1452 * <random code inserted by instruction scheduling>
1455 * To work around this problem, we don't use the common vtable trampoline when
1456 * llvm is enabled. Instead, we use one trampoline per method.
1459 mono_create_llvm_vcall_trampoline (MonoMethod *method)
1464 domain = mono_domain_get ();
1466 mono_domain_lock (domain);
1467 res = g_hash_table_lookup (domain_jit_info (domain)->llvm_vcall_trampoline_hash, method);
1468 mono_domain_unlock (domain);
1472 res = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_LLVM_VCALL, domain, NULL);
1474 mono_domain_lock (domain);
1475 g_hash_table_insert (domain_jit_info (domain)->llvm_vcall_trampoline_hash, method, res);
1476 mono_domain_unlock (domain);
1482 * mono_create_llvm_imt_trampoline:
1484 * LLVM compiled code can't pass in the IMT argument, so we use this trampoline, which
1485 * sets the IMT argument, then branches to the contents of the vtable slot given by
1486 * vt_offset in the vtable which is obtained from the argument list.
1489 mono_create_llvm_imt_trampoline (MonoDomain *domain, MonoMethod *m, int vt_offset)
1491 #ifdef MONO_ARCH_HAVE_LLVM_IMT_TRAMPOLINE
1492 return mono_arch_get_llvm_imt_trampoline (domain, m, vt_offset);
1494 g_assert_not_reached ();
1501 mono_find_class_init_trampoline_by_addr (gconstpointer addr)
1505 mono_trampolines_lock ();
1506 if (class_init_hash_addr)
1507 res = g_hash_table_lookup (class_init_hash_addr, addr);
1510 mono_trampolines_unlock ();
1515 mono_find_rgctx_lazy_fetch_trampoline_by_addr (gconstpointer addr)
1519 mono_trampolines_lock ();
1520 if (rgctx_lazy_fetch_trampoline_hash_addr) {
1521 /* We store the real offset + 1 so we can detect when the lookup fails */
1522 offset = GPOINTER_TO_INT (g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash_addr, addr));
1530 mono_trampolines_unlock ();