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 * This is a super-ugly hack to fix bug #616463.
246 * The problem is that we don't always set is_generic for generic
247 * method definitions. See the comment at the end of
248 * mono_class_inflate_generic_method_full_checked() in class.c.
251 is_generic_method_definition (MonoMethod *m)
253 MonoGenericContext *context;
259 context = mono_method_get_context (m);
260 if (!context->method_inst)
262 if (context->method_inst == mono_method_get_generic_container (((MonoMethodInflated*)m)->declaring)->context.method_inst)
268 * common_call_trampoline:
270 * The code to handle normal, virtual, and interface method calls and jumps, both
271 * from JITted and LLVM compiled code.
274 common_call_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8* tramp, MonoVTable *vt, gpointer *vtable_slot, gboolean need_rgctx_tramp)
276 gpointer addr, compiled_method;
277 gboolean generic_shared = FALSE;
278 MonoMethod *declaring = NULL;
279 MonoMethod *generic_virtual = NULL, *variant_iface = NULL;
281 gboolean virtual, proxy = FALSE, variance_used = FALSE;
282 gpointer *orig_vtable_slot, *imt_vcall_slot = NULL;
283 MonoJitInfo *ji = NULL;
285 virtual = (gpointer)vtable_slot > (gpointer)vt;
287 orig_vtable_slot = vtable_slot;
289 #ifdef MONO_ARCH_HAVE_IMT
291 if (vt && (gpointer)vtable_slot < (gpointer)vt) {
292 MonoMethod *impl_method = NULL;
293 MonoObject *this_arg;
295 /* we get the interface method because mono_convert_imt_slot_to_vtable_slot ()
296 * needs the signature to be able to find the this argument
298 m = mono_arch_find_imt_method (regs, code);
299 vtable_slot = orig_vtable_slot;
300 g_assert (vtable_slot);
302 this_arg = mono_arch_get_this_arg_from_call (NULL, mono_method_signature (m), regs, code);
304 if (this_arg->vtable->klass == mono_defaults.transparent_proxy_class) {
305 /* Use the slow path for now */
307 m = mono_object_get_virtual_method (this_arg, m);
309 imt_vcall_slot = mono_convert_imt_slot_to_vtable_slot (vtable_slot, regs, code, m, &impl_method, &need_rgctx_tramp, &variance_used);
310 vtable_slot = imt_vcall_slot;
311 /* mono_convert_imt_slot_to_vtable_slot () also gives us the method that is supposed
312 * to be called, so we compile it and go ahead as usual.
314 /*g_print ("imt found method %p (%s) at %p\n", impl_method, impl_method->name, code);*/
315 if (m->is_inflated && ((MonoMethodInflated*)m)->context.method_inst) {
316 /* Generic virtual method */
318 need_rgctx_tramp = TRUE;
319 } else if (variance_used && mono_class_has_variant_generic_params (m->klass)) {
328 * The virtual check is needed because is_generic_method_definition (m) could
329 * return TRUE for methods used in IMT calls too.
331 if (virtual && is_generic_method_definition (m)) {
332 MonoGenericContext context = { NULL, NULL };
333 MonoMethod *declaring;
336 declaring = mono_method_get_declaring_generic_method (m);
340 if (m->klass->generic_class)
341 context.class_inst = m->klass->generic_class->context.class_inst;
343 g_assert (!m->klass->generic_container);
345 #ifdef MONO_ARCH_HAVE_IMT
346 generic_virtual = mono_arch_find_imt_method (regs, code);
348 if (generic_virtual) {
349 g_assert (generic_virtual->is_inflated);
350 context.method_inst = ((MonoMethodInflated*)generic_virtual)->context.method_inst;
353 m = mono_class_inflate_generic_method (declaring, &context);
354 /* FIXME: only do this if the method is sharable */
355 need_rgctx_tramp = TRUE;
356 } else if ((context_used = mono_method_check_context_used (m))) {
357 MonoClass *klass = NULL;
358 MonoMethod *actual_method = NULL;
359 MonoVTable *vt = NULL;
360 MonoGenericInst *method_inst = NULL;
363 generic_shared = TRUE;
367 if (m->is_inflated && mono_method_get_context (m)->method_inst) {
368 #ifdef MONO_ARCH_RGCTX_REG
369 MonoMethodRuntimeGenericContext *mrgctx = (MonoMethodRuntimeGenericContext*)mono_arch_find_static_call_vtable (regs, code);
371 klass = mrgctx->class_vtable->klass;
372 method_inst = mrgctx->method_inst;
374 g_assert_not_reached ();
376 } else if ((m->flags & METHOD_ATTRIBUTE_STATIC) || m->klass->valuetype) {
377 #ifdef MONO_ARCH_RGCTX_REG
378 MonoVTable *vtable = mono_arch_find_static_call_vtable (regs, code);
380 klass = vtable->klass;
382 g_assert_not_reached ();
385 #ifdef MONO_ARCH_HAVE_IMT
386 MonoObject *this_argument = mono_arch_get_this_arg_from_call (NULL, mono_method_signature (m), regs, code);
388 vt = this_argument->vtable;
389 vtable_slot = orig_vtable_slot;
391 g_assert (this_argument->vtable->klass->inited);
392 //mono_class_init (this_argument->vtable->klass);
395 klass = this_argument->vtable->klass->supertypes [m->klass->idepth - 1];
401 g_assert (vtable_slot || klass);
404 int displacement = vtable_slot - ((gpointer*)vt);
406 g_assert_not_reached ();
408 g_assert (displacement > 0);
410 actual_method = vt->klass->vtable [displacement];
414 MonoGenericContext context = { NULL, NULL };
417 declaring = mono_method_get_declaring_generic_method (m);
421 if (klass->generic_class)
422 context.class_inst = klass->generic_class->context.class_inst;
423 else if (klass->generic_container)
424 context.class_inst = klass->generic_container->context.class_inst;
425 context.method_inst = method_inst;
427 actual_method = mono_class_inflate_generic_method (declaring, &context);
429 actual_method = mono_class_get_method_generic (klass, m);
433 g_assert (actual_method);
434 g_assert (actual_method->klass == klass);
436 if (actual_method->is_inflated)
437 declaring = mono_method_get_declaring_generic_method (actual_method);
444 if (m->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) {
448 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
452 /* Avoid recursion */
453 if (!(ji && ji->method->wrapper_type == MONO_WRAPPER_SYNCHRONIZED))
454 m = mono_marshal_get_synchronized_wrapper (m);
457 /* Calls made through delegates on platforms without delegate trampolines */
458 if (!code && mono_method_needs_static_rgctx_invoke (m, FALSE))
459 need_rgctx_tramp = TRUE;
461 addr = compiled_method = mono_compile_method (m);
464 mono_debugger_trampoline_compiled (code, m, addr);
466 if (need_rgctx_tramp)
467 addr = mono_create_static_rgctx_trampoline (m, addr);
469 if (generic_virtual || variant_iface) {
470 MonoMethod *target = generic_virtual ? generic_virtual : variant_iface;
472 vtable_slot = orig_vtable_slot;
473 g_assert (vtable_slot);
475 if (vt->klass->valuetype) /*FIXME is this required variant iface?*/
476 addr = get_unbox_trampoline (mono_get_generic_context_from_code (code), m, addr, need_rgctx_tramp);
478 mono_method_add_generic_virtual_invocation (mono_domain_get (),
485 /* the method was jumped to */
487 MonoDomain *domain = mono_domain_get ();
489 /* Patch the got entries pointing to this method */
491 * We do this here instead of in mono_codegen () to cover the case when m
492 * was loaded from an aot image.
494 if (domain_jit_info (domain)->jump_target_got_slot_hash) {
497 mono_domain_lock (domain);
498 list = g_hash_table_lookup (domain_jit_info (domain)->jump_target_got_slot_hash, m);
500 for (tmp = list; tmp; tmp = tmp->next) {
501 gpointer *got_slot = tmp->data;
504 g_hash_table_remove (domain_jit_info (domain)->jump_target_got_slot_hash, m);
507 mono_domain_unlock (domain);
513 vtable_slot = orig_vtable_slot;
516 if (m->klass->valuetype)
517 addr = get_unbox_trampoline (mono_get_generic_context_from_code (code), m, addr, need_rgctx_tramp);
518 g_assert (*vtable_slot);
520 if (!proxy && (mono_aot_is_got_entry (code, (guint8*)vtable_slot) || mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))) {
522 /* This is the vcall slot which gets called through the IMT thunk */
523 vtable_slot = imt_vcall_slot;
524 *vtable_slot = mono_get_addr_from_ftnptr (addr);
528 guint8 *plt_entry = mono_aot_get_plt_entry (code);
531 mono_aot_patch_plt_entry (plt_entry, NULL, regs, addr);
533 if (generic_shared) {
534 if (m->wrapper_type != MONO_WRAPPER_NONE)
535 m = mono_marshal_method_from_wrapper (m);
536 g_assert (mono_method_is_generic_sharable_impl (m, FALSE));
539 /* Patch calling code */
541 MonoJitInfo *target_ji =
542 mono_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method));
545 ji = mono_jit_info_table_find (mono_domain_get (), (char*)code);
547 if (mono_method_same_domain (ji, target_ji))
548 mono_arch_patch_callsite (ji->code_start, code, addr);
557 * mono_magic_trampoline:
559 * This trampoline handles normal calls from JITted code.
562 mono_magic_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp)
566 return common_call_trampoline (regs, code, arg, tramp, NULL, NULL, FALSE);
570 * mono_vcall_trampoline:
572 * This trampoline handles virtual calls.
575 mono_vcall_trampoline (mgreg_t *regs, guint8 *code, int slot, guint8 *tramp)
579 gpointer *vtable_slot;
581 gboolean need_rgctx_tramp = FALSE;
583 #ifndef MONO_ARCH_THIS_AS_FIRST_ARG
590 * We need to obtain the following pieces of information:
591 * - the method which needs to be compiled.
593 * We use one vtable trampoline per vtable slot index, so we need only the vtable,
594 * the other two can be computed from the vtable + the slot index.
596 #ifdef MONO_ARCH_THIS_AS_FIRST_ARG
598 * If the arch passes 'this' as the first arg, obtain the vtable using it.
600 this = mono_arch_get_this_arg_from_call (NULL, NULL, regs, code);
605 g_assert (!mono_use_llvm);
607 * Obtain the vtable pointer in an arch specific manner.
609 vt = mono_arch_get_vcall_slot (code, regs, &displacement);
615 ji = mono_jit_info_table_find (mono_domain_get (), (char*)code);
617 printf ("Caller: %s\n", mono_method_full_name (ji->method, TRUE));
618 /* Print some debug info */
619 for (i = 0; i < 32; ++i)
620 printf ("0x%x ", code [-32 + i]);
627 /* Normal virtual call */
628 vtable_slot = &(vt->vtable [slot]);
630 /* Avoid loading metadata or creating a generic vtable if possible */
631 addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, slot);
632 if (addr && !vt->klass->valuetype) {
633 if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
636 return mono_create_ftnptr (mono_domain_get (), addr);
641 * is_generic_method_definition() above) also
642 * goes away if we do a
643 * mono_class_setup_vtable (vt->klass) here,
644 * because we then inflate the method
645 * correctly, put it in the cache, and the
646 * "wrong" inflation invocation still looks up
647 * the correctly inflated method.
649 * The hack above seems more stable and
652 m = mono_class_get_vtable_entry (vt->klass, slot);
654 need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (m, 0);
657 vtable_slot = &(((gpointer*)vt) [slot]);
660 need_rgctx_tramp = FALSE;
664 // - get rid of mono_arch_get_vcall_slot where possible
666 return common_call_trampoline (regs, code, m, tramp, vt, vtable_slot, need_rgctx_tramp);
670 mono_generic_virtual_remoting_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8 *tramp)
672 MonoGenericContext context = { NULL, NULL };
673 MonoMethod *imt_method, *declaring;
678 g_assert (m->is_generic);
681 declaring = mono_method_get_declaring_generic_method (m);
685 if (m->klass->generic_class)
686 context.class_inst = m->klass->generic_class->context.class_inst;
688 g_assert (!m->klass->generic_container);
690 #ifdef MONO_ARCH_HAVE_IMT
691 imt_method = mono_arch_find_imt_method (regs, code);
692 if (imt_method->is_inflated)
693 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
695 m = mono_class_inflate_generic_method (declaring, &context);
696 m = mono_marshal_get_remoting_invoke_with_check (m);
698 addr = mono_compile_method (m);
701 mono_debugger_trampoline_compiled (NULL, m, addr);
707 * mono_aot_trampoline:
709 * This trampoline handles calls made from AOT code. We try to bypass the
710 * normal JIT compilation logic to avoid loading the metadata for the method.
712 #ifdef MONO_ARCH_AOT_SUPPORTED
714 mono_aot_trampoline (mgreg_t *regs, guint8 *code, guint8 *token_info,
719 MonoMethod *method = NULL;
725 image = *(gpointer*)(gpointer)token_info;
726 token_info += sizeof (gpointer);
727 token = *(guint32*)(gpointer)token_info;
729 addr = mono_aot_get_method_from_token (mono_domain_get (), image, token);
731 method = mono_get_method (image, token, NULL);
734 /* Use the generic code */
735 return mono_magic_trampoline (regs, code, method, tramp);
738 addr = mono_create_ftnptr (mono_domain_get (), addr);
740 /* This is a normal call through a PLT entry */
741 plt_entry = mono_aot_get_plt_entry (code);
742 g_assert (plt_entry);
744 mono_aot_patch_plt_entry (plt_entry, NULL, regs, addr);
750 * mono_aot_plt_trampoline:
752 * This trampoline handles calls made from AOT code through the PLT table.
755 mono_aot_plt_trampoline (mgreg_t *regs, guint8 *code, guint8 *aot_module,
758 guint32 plt_info_offset = mono_aot_get_plt_info_offset (regs, code);
763 res = mono_aot_plt_resolve (aot_module, plt_info_offset, code);
765 if (mono_loader_get_last_error ())
766 mono_raise_exception (mono_loader_error_prepare_exception (mono_loader_get_last_error ()));
767 // FIXME: Error handling (how ?)
776 * mono_class_init_trampoline:
778 * This method calls mono_runtime_class_init () to run the static constructor
779 * for the type, then patches the caller code so it is not called again.
782 mono_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp)
784 guint8 *plt_entry = mono_aot_get_plt_entry (code);
788 mono_runtime_class_init (vtable);
791 mono_arch_nullify_plt_entry (plt_entry, regs);
793 mono_arch_nullify_class_init_trampoline (code, regs);
798 * mono_generic_class_init_trampoline:
800 * This method calls mono_runtime_class_init () to run the static constructor
804 mono_generic_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp)
808 mono_runtime_class_init (vtable);
812 mono_rgctx_lazy_fetch_trampoline (mgreg_t *regs, guint8 *code, gpointer data, guint8 *tramp)
814 #ifdef MONO_ARCH_VTABLE_REG
815 static gboolean inited = FALSE;
816 static int num_lookups = 0;
817 guint32 slot = GPOINTER_TO_UINT (data);
818 mgreg_t *r = (mgreg_t*)regs;
819 gpointer arg = (gpointer)(gssize)r [MONO_ARCH_VTABLE_REG];
820 guint32 index = MONO_RGCTX_SLOT_INDEX (slot);
821 gboolean mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
826 mono_counters_register ("RGCTX unmanaged lookups", MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_lookups);
833 return mono_method_fill_runtime_generic_context (arg, index);
835 return mono_class_fill_runtime_generic_context (arg, index);
837 g_assert_not_reached ();
842 mono_monitor_enter_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
844 mono_monitor_enter (obj);
848 mono_monitor_exit_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
850 mono_monitor_exit (obj);
853 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
856 * mono_delegate_trampoline:
858 * This trampoline handles calls made to Delegate:Invoke ().
859 * This is called once the first time a delegate is invoked, so it must be fast.
862 mono_delegate_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp)
864 MonoDomain *domain = mono_domain_get ();
865 MonoDelegate *delegate;
868 MonoMethod *method = NULL;
869 gboolean multicast, callvirt = FALSE;
870 gboolean need_rgctx_tramp = FALSE;
871 MonoMethod *invoke = tramp_data [0];
872 guint8 *impl_this = tramp_data [1];
873 guint8 *impl_nothis = tramp_data [2];
875 MonoMethodSignature *sig;
879 /* Obtain the delegate object according to the calling convention */
882 * Avoid calling mono_get_generic_context_from_code () now since it is expensive,
883 * get_this_arg_from_call will call it if needed.
885 delegate = mono_arch_get_this_arg_from_call (NULL, mono_method_signature (invoke), regs, code);
887 if (delegate->method) {
888 method = delegate->method;
891 * delegate->method_ptr == NULL means the delegate was initialized by
892 * mini_delegate_ctor, while != NULL means it is initialized by
893 * mono_delegate_ctor_with_method (). In both cases, we need to add wrappers
894 * (ctor_with_method () does this, but it doesn't store the wrapper back into
897 if (delegate->target && delegate->target->vtable->klass == mono_defaults.transparent_proxy_class) {
899 if (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class != mono_defaults.com_object_class &&
900 !((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class->is_com_object)
902 method = mono_marshal_get_remoting_invoke (method);
905 mono_error_init (&err);
906 sig = mono_method_signature_checked (method, &err);
908 mono_error_raise_exception (&err);
910 if (sig->hasthis && method->klass->valuetype)
911 method = mono_marshal_get_unbox_wrapper (method);
914 ji = mono_jit_info_table_find (domain, mono_get_addr_from_ftnptr (delegate->method_ptr));
920 mono_error_init (&err);
921 sig = mono_method_signature_checked (method, &err);
923 mono_error_raise_exception (&err);
925 callvirt = !delegate->target && sig->hasthis;
928 if (method && method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
929 method = mono_marshal_get_synchronized_wrapper (method);
931 if (method && mono_method_needs_static_rgctx_invoke (method, FALSE))
932 need_rgctx_tramp = TRUE;
935 * If the called address is a trampoline, replace it with the compiled method so
936 * further calls don't have to go through the trampoline.
938 if (method && !callvirt) {
939 /* Avoid the overhead of looking up an already compiled method if possible */
940 if (delegate->method_code && *delegate->method_code) {
941 delegate->method_ptr = *delegate->method_code;
943 delegate->method_ptr = mono_compile_method (method);
944 if (need_rgctx_tramp)
945 delegate->method_ptr = mono_create_static_rgctx_trampoline (method, delegate->method_ptr);
946 if (delegate->method_code)
947 *delegate->method_code = delegate->method_ptr;
948 mono_debugger_trampoline_compiled (NULL, method, delegate->method_ptr);
951 if (need_rgctx_tramp)
952 delegate->method_ptr = mono_create_static_rgctx_trampoline (method, delegate->method_ptr);
955 multicast = ((MonoMulticastDelegate*)delegate)->prev != NULL;
956 if (!multicast && !callvirt) {
957 if (method && (method->flags & METHOD_ATTRIBUTE_STATIC) && mono_method_signature (method)->param_count == mono_method_signature (invoke)->param_count + 1)
958 /* Closed static delegate */
961 code = delegate->target ? impl_this : impl_nothis;
964 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
969 /* The general, unoptimized case */
970 m = mono_marshal_get_delegate_invoke (invoke, delegate);
971 code = mono_compile_method (m);
972 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
973 mono_debugger_trampoline_compiled (NULL, m, delegate->invoke_impl);
980 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
982 mono_handler_block_guard_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp)
986 MonoJitTlsData *jit_tls = TlsGetValue (mono_jit_tls_id);
987 gpointer resume_ip = jit_tls->handler_block_return_address;
989 memcpy (&ctx, &jit_tls->ex_ctx, sizeof (MonoContext));
990 MONO_CONTEXT_SET_IP (&ctx, jit_tls->handler_block_return_address);
992 jit_tls->handler_block_return_address = NULL;
993 jit_tls->handler_block = NULL;
995 if (!resume_ip) /*this should not happen, but we should avoid crashing */
996 exc = mono_get_exception_execution_engine ("Invalid internal state, resuming abort after handler block but no resume ip found");
998 exc = mono_thread_resume_interruption ();
1001 static void (*restore_context) (MonoContext *);
1003 if (!restore_context)
1004 restore_context = mono_get_restore_context ();
1006 mono_handle_exception (&ctx, exc, NULL, FALSE);
1007 restore_context (&ctx);
1014 mono_create_handler_block_trampoline (void)
1016 static gpointer code;
1018 if (mono_aot_only) {
1023 mono_trampolines_lock ();
1026 code = mono_arch_create_handler_block_trampoline ();
1028 mono_trampolines_unlock ();
1035 * mono_get_trampoline_func:
1037 * Return the C function which needs to be called by the generic trampoline of type
1041 mono_get_trampoline_func (MonoTrampolineType tramp_type)
1043 switch (tramp_type) {
1044 case MONO_TRAMPOLINE_JIT:
1045 case MONO_TRAMPOLINE_JUMP:
1046 return mono_magic_trampoline;
1047 case MONO_TRAMPOLINE_CLASS_INIT:
1048 return mono_class_init_trampoline;
1049 case MONO_TRAMPOLINE_GENERIC_CLASS_INIT:
1050 return mono_generic_class_init_trampoline;
1051 case MONO_TRAMPOLINE_RGCTX_LAZY_FETCH:
1052 return mono_rgctx_lazy_fetch_trampoline;
1053 #ifdef MONO_ARCH_AOT_SUPPORTED
1054 case MONO_TRAMPOLINE_AOT:
1055 return mono_aot_trampoline;
1056 case MONO_TRAMPOLINE_AOT_PLT:
1057 return mono_aot_plt_trampoline;
1059 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1060 case MONO_TRAMPOLINE_DELEGATE:
1061 return mono_delegate_trampoline;
1063 case MONO_TRAMPOLINE_RESTORE_STACK_PROT:
1064 return mono_altstack_restore_prot;
1065 case MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING:
1066 return mono_generic_virtual_remoting_trampoline;
1067 case MONO_TRAMPOLINE_MONITOR_ENTER:
1068 return mono_monitor_enter_trampoline;
1069 case MONO_TRAMPOLINE_MONITOR_EXIT:
1070 return mono_monitor_exit_trampoline;
1071 case MONO_TRAMPOLINE_VCALL:
1072 return mono_vcall_trampoline;
1073 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1074 case MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD:
1075 return mono_handler_block_guard_trampoline;
1078 g_assert_not_reached ();
1084 create_trampoline_code (MonoTrampolineType tramp_type)
1086 MonoTrampInfo *info;
1089 code = mono_arch_create_generic_trampoline (tramp_type, &info, FALSE);
1091 mono_save_trampoline_xdebug_info (info);
1092 mono_tramp_info_free (info);
1099 mono_trampolines_init (void)
1101 InitializeCriticalSection (&trampolines_mutex);
1106 mono_trampoline_code [MONO_TRAMPOLINE_JIT] = create_trampoline_code (MONO_TRAMPOLINE_JIT);
1107 mono_trampoline_code [MONO_TRAMPOLINE_JUMP] = create_trampoline_code (MONO_TRAMPOLINE_JUMP);
1108 mono_trampoline_code [MONO_TRAMPOLINE_CLASS_INIT] = create_trampoline_code (MONO_TRAMPOLINE_CLASS_INIT);
1109 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_CLASS_INIT] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_CLASS_INIT);
1110 mono_trampoline_code [MONO_TRAMPOLINE_RGCTX_LAZY_FETCH] = create_trampoline_code (MONO_TRAMPOLINE_RGCTX_LAZY_FETCH);
1111 #ifdef MONO_ARCH_AOT_SUPPORTED
1112 mono_trampoline_code [MONO_TRAMPOLINE_AOT] = create_trampoline_code (MONO_TRAMPOLINE_AOT);
1113 mono_trampoline_code [MONO_TRAMPOLINE_AOT_PLT] = create_trampoline_code (MONO_TRAMPOLINE_AOT_PLT);
1115 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1116 mono_trampoline_code [MONO_TRAMPOLINE_DELEGATE] = create_trampoline_code (MONO_TRAMPOLINE_DELEGATE);
1118 mono_trampoline_code [MONO_TRAMPOLINE_RESTORE_STACK_PROT] = create_trampoline_code (MONO_TRAMPOLINE_RESTORE_STACK_PROT);
1119 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING);
1120 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_ENTER] = create_trampoline_code (MONO_TRAMPOLINE_MONITOR_ENTER);
1121 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_EXIT] = create_trampoline_code (MONO_TRAMPOLINE_MONITOR_EXIT);
1122 mono_trampoline_code [MONO_TRAMPOLINE_VCALL] = create_trampoline_code (MONO_TRAMPOLINE_VCALL);
1123 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1124 mono_trampoline_code [MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD] = create_trampoline_code (MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD);
1125 mono_create_handler_block_trampoline ();
1128 mono_counters_register ("Calls to trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &trampoline_calls);
1132 mono_trampolines_cleanup (void)
1134 if (class_init_hash_addr)
1135 g_hash_table_destroy (class_init_hash_addr);
1137 DeleteCriticalSection (&trampolines_mutex);
1141 mono_get_trampoline_code (MonoTrampolineType tramp_type)
1143 g_assert (mono_trampoline_code [tramp_type]);
1145 return mono_trampoline_code [tramp_type];
1149 mono_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
1152 return mono_aot_create_specific_trampoline (mono_defaults.corlib, arg1, tramp_type, domain, code_len);
1154 return mono_arch_create_specific_trampoline (arg1, tramp_type, domain, code_len);
1158 mono_create_class_init_trampoline (MonoVTable *vtable)
1161 MonoDomain *domain = vtable->domain;
1163 g_assert (!vtable->klass->generic_container);
1165 /* previously created trampoline code */
1166 mono_domain_lock (domain);
1168 g_hash_table_lookup (domain_jit_info (domain)->class_init_trampoline_hash,
1170 mono_domain_unlock (domain);
1174 code = mono_create_specific_trampoline (vtable, MONO_TRAMPOLINE_CLASS_INIT, domain, NULL);
1176 ptr = mono_create_ftnptr (domain, code);
1178 /* store trampoline address */
1179 mono_domain_lock (domain);
1180 g_hash_table_insert (domain_jit_info (domain)->class_init_trampoline_hash,
1182 mono_domain_unlock (domain);
1184 mono_trampolines_lock ();
1185 if (!class_init_hash_addr)
1186 class_init_hash_addr = g_hash_table_new (NULL, NULL);
1187 g_hash_table_insert (class_init_hash_addr, ptr, vtable);
1188 mono_trampolines_unlock ();
1194 mono_create_generic_class_init_trampoline (void)
1196 #ifdef MONO_ARCH_VTABLE_REG
1197 static gpointer code;
1198 MonoTrampInfo *info;
1200 mono_trampolines_lock ();
1204 /* get_named_code () might return an ftnptr, but our caller expects a direct pointer */
1205 code = mono_get_addr_from_ftnptr (mono_aot_get_trampoline ("generic_class_init_trampoline"));
1207 code = mono_arch_create_generic_class_init_trampoline (&info, FALSE);
1210 mono_save_trampoline_xdebug_info (info);
1211 mono_tramp_info_free (info);
1216 mono_trampolines_unlock ();
1220 g_assert_not_reached ();
1225 mono_create_jump_trampoline (MonoDomain *domain, MonoMethod *method, gboolean add_sync_wrapper)
1229 guint32 code_size = 0;
1231 code = mono_jit_find_compiled_method_with_jit_info (domain, method, &ji);
1233 * We cannot recover the correct type of a shared generic
1234 * method from its native code address, so we use the
1235 * trampoline instead.
1237 if (code && !ji->has_generic_jit_info)
1240 mono_domain_lock (domain);
1241 code = g_hash_table_lookup (domain_jit_info (domain)->jump_trampoline_hash, method);
1242 mono_domain_unlock (domain);
1246 code = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JUMP, mono_domain_get (), &code_size);
1247 g_assert (code_size);
1249 ji = mono_domain_alloc0 (domain, MONO_SIZEOF_JIT_INFO);
1250 ji->code_start = code;
1251 ji->code_size = code_size;
1252 ji->method = method;
1255 * mono_delegate_ctor needs to find the method metadata from the
1256 * trampoline address, so we save it here.
1259 mono_jit_info_table_add (domain, ji);
1261 mono_domain_lock (domain);
1262 g_hash_table_insert (domain_jit_info (domain)->jump_trampoline_hash, method, ji->code_start);
1263 mono_domain_unlock (domain);
1265 return ji->code_start;
1269 mono_create_jit_trampoline_in_domain (MonoDomain *domain, MonoMethod *method)
1273 if (mono_aot_only) {
1274 /* Avoid creating trampolines if possible */
1275 gpointer code = mono_jit_find_compiled_method (domain, method);
1281 mono_domain_lock (domain);
1282 tramp = g_hash_table_lookup (domain_jit_info (domain)->jit_trampoline_hash, method);
1283 mono_domain_unlock (domain);
1287 tramp = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JIT, domain, NULL);
1289 mono_domain_lock (domain);
1290 g_hash_table_insert (domain_jit_info (domain)->jit_trampoline_hash, method, tramp);
1291 mono_domain_unlock (domain);
1293 mono_jit_stats.method_trampolines++;
1299 mono_create_jit_trampoline (MonoMethod *method)
1301 return mono_create_jit_trampoline_in_domain (mono_domain_get (), method);
1305 mono_create_jit_trampoline_from_token (MonoImage *image, guint32 token)
1309 MonoDomain *domain = mono_domain_get ();
1310 guint8 *buf, *start;
1312 buf = start = mono_domain_code_reserve (domain, 2 * sizeof (gpointer));
1314 *(gpointer*)(gpointer)buf = image;
1315 buf += sizeof (gpointer);
1316 *(guint32*)(gpointer)buf = token;
1318 tramp = mono_create_specific_trampoline (start, MONO_TRAMPOLINE_AOT, domain, NULL);
1320 mono_jit_stats.method_trampolines++;
1326 mono_create_delegate_trampoline (MonoClass *klass)
1328 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1329 MonoDomain *domain = mono_domain_get ();
1331 guint32 code_size = 0;
1332 gpointer *tramp_data;
1335 mono_domain_lock (domain);
1336 ptr = g_hash_table_lookup (domain_jit_info (domain)->delegate_trampoline_hash, klass);
1337 mono_domain_unlock (domain);
1341 // Precompute the delegate invoke impl and pass it to the delegate trampoline
1342 invoke = mono_get_delegate_invoke (klass);
1345 tramp_data = mono_domain_alloc (domain, sizeof (gpointer) * 3);
1346 tramp_data [0] = invoke;
1347 tramp_data [1] = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), TRUE);
1348 tramp_data [2] = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), FALSE);
1350 ptr = mono_create_specific_trampoline (tramp_data, MONO_TRAMPOLINE_DELEGATE, mono_domain_get (), &code_size);
1351 g_assert (code_size);
1353 /* store trampoline address */
1354 mono_domain_lock (domain);
1355 g_hash_table_insert (domain_jit_info (domain)->delegate_trampoline_hash,
1357 mono_domain_unlock (domain);
1366 mono_create_rgctx_lazy_fetch_trampoline (guint32 offset)
1368 static gboolean inited = FALSE;
1369 static int num_trampolines = 0;
1370 MonoTrampInfo *info;
1372 gpointer tramp, ptr;
1375 return mono_aot_get_lazy_fetch_trampoline (offset);
1377 mono_trampolines_lock ();
1378 if (rgctx_lazy_fetch_trampoline_hash)
1379 tramp = g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset));
1382 mono_trampolines_unlock ();
1386 tramp = mono_arch_create_rgctx_lazy_fetch_trampoline (offset, &info, FALSE);
1388 mono_save_trampoline_xdebug_info (info);
1389 mono_tramp_info_free (info);
1391 ptr = mono_create_ftnptr (mono_get_root_domain (), tramp);
1393 mono_trampolines_lock ();
1394 if (!rgctx_lazy_fetch_trampoline_hash) {
1395 rgctx_lazy_fetch_trampoline_hash = g_hash_table_new (NULL, NULL);
1396 rgctx_lazy_fetch_trampoline_hash_addr = g_hash_table_new (NULL, NULL);
1398 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset), ptr);
1399 g_assert (offset != -1);
1400 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash_addr, ptr, GUINT_TO_POINTER (offset + 1));
1401 mono_trampolines_unlock ();
1404 mono_counters_register ("RGCTX num lazy fetch trampolines",
1405 MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_trampolines);
1414 mono_create_monitor_enter_trampoline (void)
1416 static gpointer code;
1418 if (mono_aot_only) {
1420 code = mono_aot_get_trampoline ("monitor_enter_trampoline");
1424 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
1425 mono_trampolines_lock ();
1428 code = mono_arch_create_monitor_enter_trampoline (NULL, FALSE);
1430 mono_trampolines_unlock ();
1433 g_assert_not_reached ();
1440 mono_create_monitor_exit_trampoline (void)
1442 static gpointer code;
1444 if (mono_aot_only) {
1446 code = mono_aot_get_trampoline ("monitor_exit_trampoline");
1450 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
1451 mono_trampolines_lock ();
1454 code = mono_arch_create_monitor_exit_trampoline (NULL, FALSE);
1456 mono_trampolines_unlock ();
1459 g_assert_not_reached ();
1464 #ifdef MONO_ARCH_LLVM_SUPPORTED
1466 * mono_create_llvm_imt_trampoline:
1468 * LLVM compiled code can't pass in the IMT argument, so we use this trampoline, which
1469 * sets the IMT argument, then branches to the contents of the vtable slot given by
1470 * vt_offset in the vtable which is obtained from the argument list.
1473 mono_create_llvm_imt_trampoline (MonoDomain *domain, MonoMethod *m, int vt_offset)
1475 #ifdef MONO_ARCH_HAVE_LLVM_IMT_TRAMPOLINE
1476 return mono_arch_get_llvm_imt_trampoline (domain, m, vt_offset);
1478 g_assert_not_reached ();
1485 mono_find_class_init_trampoline_by_addr (gconstpointer addr)
1489 mono_trampolines_lock ();
1490 if (class_init_hash_addr)
1491 res = g_hash_table_lookup (class_init_hash_addr, addr);
1494 mono_trampolines_unlock ();
1499 mono_find_rgctx_lazy_fetch_trampoline_by_addr (gconstpointer addr)
1503 mono_trampolines_lock ();
1504 if (rgctx_lazy_fetch_trampoline_hash_addr) {
1505 /* We store the real offset + 1 so we can detect when the lookup fails */
1506 offset = GPOINTER_TO_INT (g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash_addr, addr));
1514 mono_trampolines_unlock ();
1518 static const char*tramp_names [MONO_TRAMPOLINE_NUM] = {
1522 "generic_class_init",
1527 "restore_stack_prot",
1528 "generic_virtual_remoting",
1532 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1533 "handler_block_guard"
1538 * mono_get_generic_trampoline_name:
1540 * Returns a pointer to malloc-ed memory.
1543 mono_get_generic_trampoline_name (MonoTrampolineType tramp_type)
1545 return g_strdup_printf ("generic_trampoline_%s", tramp_names [tramp_type]);
1549 * mono_get_rgctx_fetch_trampoline_name:
1551 * Returns a pointer to malloc-ed memory.
1554 mono_get_rgctx_fetch_trampoline_name (int slot)
1559 mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
1560 index = MONO_RGCTX_SLOT_INDEX (slot);
1562 return g_strdup_printf ("rgctx_fetch_trampoline_%s_%d", mrgctx ? "mrgctx" : "rgctx", index);