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>
12 #include "debug-mini.h"
15 * Address of the trampoline code. This is used by the debugger to check
16 * whether a method is a trampoline.
18 guint8* mono_trampoline_code [MONO_TRAMPOLINE_NUM];
20 static GHashTable *class_init_hash_addr = NULL;
21 static GHashTable *rgctx_lazy_fetch_trampoline_hash = NULL;
22 static GHashTable *rgctx_lazy_fetch_trampoline_hash_addr = NULL;
24 #define mono_trampolines_lock() EnterCriticalSection (&trampolines_mutex)
25 #define mono_trampolines_unlock() LeaveCriticalSection (&trampolines_mutex)
26 static CRITICAL_SECTION trampolines_mutex;
29 get_unbox_trampoline (MonoGenericSharingContext *gsctx, MonoMethod *m, gpointer addr, gboolean need_rgctx_tramp)
34 * The unbox trampolines call the method directly, so need to add
35 * an rgctx tramp before them.
37 return mono_create_static_rgctx_trampoline (m, mono_aot_get_unbox_trampoline (m));
39 return mono_aot_get_unbox_trampoline (m);
41 return mono_arch_get_unbox_trampoline (gsctx, m, addr);
45 #ifdef MONO_ARCH_HAVE_STATIC_RGCTX_TRAMPOLINE
53 rgctx_tramp_info_equal (gconstpointer ka, gconstpointer kb)
55 const RgctxTrampInfo *i1 = ka;
56 const RgctxTrampInfo *i2 = kb;
58 if (i1->m == i2->m && i1->addr == i2->addr)
65 rgctx_tramp_info_hash (gconstpointer data)
67 const RgctxTrampInfo *info = data;
69 return GPOINTER_TO_UINT (info->m) ^ GPOINTER_TO_UINT (info->addr);
73 * mono_create_static_rgctx_trampoline:
75 * Return a static rgctx trampoline for M which branches to ADDR which should
76 * point to the compiled code of M.
78 * Static rgctx trampolines are used when a shared generic method which doesn't
79 * have a this argument is called indirectly, ie. from code which can't pass in
80 * the rgctx argument. The trampoline sets the rgctx argument and jumps to the
81 * methods code. These trampolines are similar to the unbox trampolines, they
82 * perform the same task as the static rgctx wrappers, but they are smaller/faster,
83 * and can be made to work with full AOT.
84 * On PPC addr should be an ftnptr and the return value is an ftnptr too.
87 mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr)
92 RgctxTrampInfo tmp_info;
95 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
96 g_assert (((gpointer*)addr) [2] == 0);
99 if (mini_method_get_context (m)->method_inst)
100 ctx = mono_method_lookup_rgctx (mono_class_vtable (mono_domain_get (), m->klass), mini_method_get_context (m)->method_inst);
102 ctx = mono_class_vtable (mono_domain_get (), m->klass);
104 domain = mono_domain_get ();
107 * In the AOT case, addr might point to either the method, or to an unbox trampoline,
108 * so make the hash keyed on the m+addr pair.
110 mono_domain_lock (domain);
111 if (!domain_jit_info (domain)->static_rgctx_trampoline_hash)
112 domain_jit_info (domain)->static_rgctx_trampoline_hash = g_hash_table_new (rgctx_tramp_info_hash, rgctx_tramp_info_equal);
114 tmp_info.addr = addr;
115 res = g_hash_table_lookup (domain_jit_info (domain)->static_rgctx_trampoline_hash,
117 mono_domain_unlock (domain);
122 res = mono_aot_get_static_rgctx_trampoline (ctx, addr);
124 res = mono_arch_get_static_rgctx_trampoline (m, ctx, addr);
126 mono_domain_lock (domain);
127 /* Duplicates inserted while we didn't hold the lock are OK */
128 info = mono_domain_alloc (domain, sizeof (RgctxTrampInfo));
131 g_hash_table_insert (domain_jit_info (domain)->static_rgctx_trampoline_hash, info, res);
132 mono_domain_unlock (domain);
138 mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr)
141 * This shouldn't happen as all arches which support generic sharing support
142 * static rgctx trampolines as well.
144 g_assert_not_reached ();
149 mono_get_vcall_slot_addr (guint8* code, mgreg_t *regs)
153 vt = mono_arch_get_vcall_slot (code, regs, &displacement);
156 return (gpointer*)((char*)vt + displacement);
159 #ifdef MONO_ARCH_HAVE_IMT
162 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)
164 MonoObject *this_argument = mono_arch_get_this_arg_from_call (NULL, mono_method_signature (method), regs, code);
165 MonoVTable *vt = this_argument->vtable;
166 int displacement = slot - ((gpointer*)vt);
168 if (displacement > 0) {
169 /* slot is in the vtable, not in the IMT */
171 printf ("mono_convert_imt_slot_to_vtable_slot: slot %p is in the vtable, not in the IMT\n", slot);
175 MonoMethod *imt_method = mono_arch_find_imt_method (regs, code);
176 int interface_offset;
177 int imt_slot = MONO_IMT_SIZE + displacement;
179 /*This has to be variance aware since imt_method can be from an interface that vt->klass doesn't directly implement*/
180 interface_offset = mono_class_interface_offset_with_variance (vt->klass, imt_method->klass, variance_used);
182 if (interface_offset < 0) {
183 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));
185 mono_vtable_build_imt_slot (vt, mono_method_get_imt_slot (imt_method));
190 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 (impl, &context);
205 impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_vtable_slot (imt_method));
208 if (mono_method_needs_static_rgctx_invoke (impl, FALSE))
209 *need_rgctx_tramp = TRUE;
213 printf ("mono_convert_imt_slot_to_vtable_slot: method = %s.%s.%s, imt_method = %s.%s.%s\n",
214 method->klass->name_space, method->klass->name, method->name,
215 imt_method->klass->name_space, imt_method->klass->name, imt_method->name);
218 g_assert (imt_slot < MONO_IMT_SIZE);
219 if (vt->imt_collisions_bitmap & (1 << imt_slot)) {
220 int slot = mono_method_get_vtable_index (imt_method);
222 gpointer *vtable_slot;
224 g_assert (slot != -1);
225 vtable_offset = interface_offset + slot;
226 vtable_slot = & (vt->vtable [vtable_offset]);
228 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);
233 printf ("mono_convert_imt_slot_to_vtable_slot: slot %p[%d] is in the IMT, but not colliding\n", slot, imt_slot);
242 * common_call_trampoline:
244 * The code to handle normal, virtual, and interface method calls and jumps, both
245 * from JITted and LLVM compiled code.
248 common_call_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp, MonoVTable *vt, gpointer *vtable_slot, gboolean need_rgctx_tramp)
251 gboolean generic_shared = FALSE;
253 MonoMethod *declaring = NULL;
254 MonoMethod *generic_virtual = NULL, *variant_iface = NULL;
256 gboolean proxy = FALSE, variance_used = FALSE;
257 gpointer *orig_vtable_slot;
258 MonoJitInfo *ji = NULL;
262 orig_vtable_slot = vtable_slot;
264 if (m == MONO_FAKE_VTABLE_METHOD) {
270 ji = mono_jit_info_table_find (mono_domain_get (), (char*)code);
272 printf ("Caller: %s\n", mono_method_full_name (ji->method, TRUE));
273 /* Print some debug info */
274 for (i = 0; i < 32; ++i)
275 printf ("0x%x ", code [-32 + i]);
279 displacement = (guint8*)vtable_slot - (guint8*)vt;
280 if (displacement > 0) {
281 int slot = (displacement - G_STRUCT_OFFSET (MonoVTable, vtable)) / sizeof (gpointer);
282 g_assert (slot >= 0);
284 /* Avoid loading metadata or creating a generic vtable if possible */
285 addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, slot);
287 addr = mono_create_ftnptr (mono_domain_get (), addr);
288 if (addr && !vt->klass->valuetype) {
289 vtable_slot = mono_get_vcall_slot_addr (code, regs);
290 if (mono_aot_is_got_entry (code, (guint8*)vtable_slot) || mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot)) {
291 *vtable_slot = mono_get_addr_from_ftnptr (addr);
297 m = mono_class_get_vtable_entry (vt->klass, slot);
298 if (mono_method_needs_static_rgctx_invoke (m, FALSE))
299 need_rgctx_tramp = TRUE;
301 /*g_print ("%s with disp %d: %s at %p\n", vt->klass->name, displacement, m->name, code);*/
303 /* We got here from an interface method: redirect to IMT handling */
304 m = MONO_FAKE_IMT_METHOD;
305 /*g_print ("vtable with disp %d at %p\n", displacement, code);*/
309 /* this is the IMT trampoline */
310 #ifdef MONO_ARCH_HAVE_IMT
311 if (m == MONO_FAKE_IMT_METHOD) {
312 MonoMethod *impl_method;
313 MonoObject *this_arg;
315 /* we get the interface method because mono_convert_imt_slot_to_vtable_slot ()
316 * needs the signature to be able to find the this argument
318 m = mono_arch_find_imt_method (regs, code);
319 vtable_slot = orig_vtable_slot;
320 g_assert (vtable_slot);
322 this_arg = mono_arch_get_this_arg_from_call (NULL, mono_method_signature (m), regs, code);
324 if (this_arg->vtable->klass == mono_defaults.transparent_proxy_class) {
325 /* Use the slow path for now */
327 m = mono_object_get_virtual_method (this_arg, m);
329 vtable_slot = mono_convert_imt_slot_to_vtable_slot (vtable_slot, regs, code, m, &impl_method, &need_rgctx_tramp, &variance_used);
330 /* mono_convert_imt_slot_to_vtable_slot () also gives us the method that is supposed
331 * to be called, so we compile it and go ahead as usual.
333 /*g_print ("imt found method %p (%s) at %p\n", impl_method, impl_method->name, code);*/
334 if (m->is_inflated && ((MonoMethodInflated*)m)->context.method_inst) {
335 /* Generic virtual method */
337 need_rgctx_tramp = TRUE;
338 } else if (variance_used && mono_class_has_variant_generic_params (m->klass)) {
346 #ifdef MONO_ARCH_LLVM_SUPPORTED
347 if (!vtable_slot && code && !need_rgctx_tramp && mono_method_needs_static_rgctx_invoke (m, FALSE)) {
349 * Call this only if the called method is shared, cause it is slow/loads a lot of
352 ji = mono_jit_info_table_find (mono_domain_get (), (char*)code);
353 if (ji && ji->from_llvm) {
354 /* LLVM can't pass an rgctx arg */
355 need_rgctx_tramp = TRUE;
361 MonoGenericContext context = { NULL, NULL };
362 MonoMethod *declaring;
365 declaring = mono_method_get_declaring_generic_method (m);
369 if (m->klass->generic_class)
370 context.class_inst = m->klass->generic_class->context.class_inst;
372 g_assert (!m->klass->generic_container);
374 #ifdef MONO_ARCH_HAVE_IMT
375 generic_virtual = mono_arch_find_imt_method (regs, code);
377 if (generic_virtual) {
378 g_assert (generic_virtual->is_inflated);
379 context.method_inst = ((MonoMethodInflated*)generic_virtual)->context.method_inst;
382 m = mono_class_inflate_generic_method (declaring, &context);
383 /* FIXME: only do this if the method is sharable */
384 need_rgctx_tramp = TRUE;
385 } else if ((context_used = mono_method_check_context_used (m))) {
386 MonoClass *klass = NULL;
387 MonoMethod *actual_method = NULL;
388 MonoVTable *vt = NULL;
389 MonoGenericInst *method_inst = NULL;
392 generic_shared = TRUE;
396 if (m->is_inflated && mono_method_get_context (m)->method_inst) {
397 #ifdef MONO_ARCH_RGCTX_REG
398 MonoMethodRuntimeGenericContext *mrgctx = (MonoMethodRuntimeGenericContext*)mono_arch_find_static_call_vtable (regs, code);
400 klass = mrgctx->class_vtable->klass;
401 method_inst = mrgctx->method_inst;
403 g_assert_not_reached ();
405 } else if ((m->flags & METHOD_ATTRIBUTE_STATIC) || m->klass->valuetype) {
406 #ifdef MONO_ARCH_RGCTX_REG
407 MonoVTable *vtable = mono_arch_find_static_call_vtable (regs, code);
409 klass = vtable->klass;
411 g_assert_not_reached ();
414 #ifdef MONO_ARCH_HAVE_IMT
415 MonoObject *this_argument = mono_arch_get_this_arg_from_call (NULL, mono_method_signature (m), regs, code);
417 vt = this_argument->vtable;
418 vtable_slot = orig_vtable_slot;
420 g_assert (this_argument->vtable->klass->inited);
421 //mono_class_init (this_argument->vtable->klass);
424 klass = this_argument->vtable->klass->supertypes [m->klass->idepth - 1];
430 g_assert (vtable_slot || klass);
433 int displacement = vtable_slot - ((gpointer*)vt);
435 g_assert_not_reached ();
437 g_assert (displacement > 0);
439 actual_method = vt->klass->vtable [displacement];
443 MonoGenericContext context = { NULL, NULL };
446 declaring = mono_method_get_declaring_generic_method (m);
450 if (klass->generic_class)
451 context.class_inst = klass->generic_class->context.class_inst;
452 else if (klass->generic_container)
453 context.class_inst = klass->generic_container->context.class_inst;
454 context.method_inst = method_inst;
456 actual_method = mono_class_inflate_generic_method (declaring, &context);
458 actual_method = mono_class_get_method_generic (klass, m);
462 g_assert (actual_method);
463 g_assert (actual_method->klass == klass);
465 if (actual_method->is_inflated)
466 declaring = mono_method_get_declaring_generic_method (actual_method);
473 if (m->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) {
477 ji = mono_jit_info_table_find (mono_domain_get (), (char*)code);
481 /* Avoid recursion */
482 if (!(ji && ji->method->wrapper_type == MONO_WRAPPER_SYNCHRONIZED))
483 m = mono_marshal_get_synchronized_wrapper (m);
486 /* Calls made through delegates on platforms without delegate trampolines */
487 if (!code && mono_method_needs_static_rgctx_invoke (m, FALSE))
488 need_rgctx_tramp = TRUE;
490 addr = mono_compile_method (m);
493 mono_debugger_trampoline_compiled (code, m, addr);
495 if (need_rgctx_tramp)
496 addr = mono_create_static_rgctx_trampoline (m, addr);
498 if (generic_virtual || variant_iface) {
499 MonoMethod *target = generic_virtual ? generic_virtual : variant_iface;
501 vtable_slot = orig_vtable_slot;
502 g_assert (vtable_slot);
504 if (vt->klass->valuetype) /*FIXME is this required variant iface?*/
505 addr = get_unbox_trampoline (mono_get_generic_context_from_code (code), m, addr, need_rgctx_tramp);
507 mono_method_add_generic_virtual_invocation (mono_domain_get (),
514 /* the method was jumped to */
516 MonoDomain *domain = mono_domain_get ();
518 /* Patch the got entries pointing to this method */
520 * We do this here instead of in mono_codegen () to cover the case when m
521 * was loaded from an aot image.
523 if (domain_jit_info (domain)->jump_target_got_slot_hash) {
526 mono_domain_lock (domain);
527 list = g_hash_table_lookup (domain_jit_info (domain)->jump_target_got_slot_hash, m);
529 for (tmp = list; tmp; tmp = tmp->next) {
530 gpointer *got_slot = tmp->data;
533 g_hash_table_remove (domain_jit_info (domain)->jump_target_got_slot_hash, m);
536 mono_domain_unlock (domain);
542 vtable_slot = orig_vtable_slot;
545 gboolean variance_used = FALSE;
546 if (m->klass->valuetype)
547 addr = get_unbox_trampoline (mono_get_generic_context_from_code (code), m, addr, need_rgctx_tramp);
548 g_assert (*vtable_slot);
550 if (!proxy && (mono_aot_is_got_entry (code, (guint8*)vtable_slot) || mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))) {
551 #ifdef MONO_ARCH_HAVE_IMT
552 vtable_slot = mono_convert_imt_slot_to_vtable_slot (vtable_slot, regs, code, m, NULL, &need_rgctx_tramp, &variance_used);
554 *vtable_slot = mono_get_addr_from_ftnptr (addr);
558 guint8 *plt_entry = mono_aot_get_plt_entry (code);
561 mono_arch_patch_plt_entry (plt_entry, NULL, regs, addr);
562 } else if (!generic_shared || (m->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) ||
563 mono_domain_lookup_shared_generic (mono_domain_get (), declaring)) {
564 if (generic_shared) {
565 if (m->wrapper_type != MONO_WRAPPER_NONE)
566 m = mono_marshal_method_from_wrapper (m);
567 g_assert (mono_method_is_generic_sharable_impl (m, FALSE));
570 /* Patch calling code */
574 MonoJitInfo *target_ji =
575 mono_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (addr));
578 ji = mono_jit_info_table_find (mono_domain_get (), (char*)code);
580 if (mono_method_same_domain (ji, target_ji))
581 mono_arch_patch_callsite (ji->code_start, code, addr);
590 * mono_magic_trampoline:
592 * This trampoline handles calls from JITted code.
595 mono_magic_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp)
597 gpointer *vtable_slot;
601 if (code && !mono_use_llvm)
602 vt = mono_arch_get_vcall_slot (code, regs, &displacement);
606 vtable_slot = (gpointer*)((char*)vt + displacement);
610 return common_call_trampoline (regs, code, arg, tramp, vt, vtable_slot, FALSE);
613 #ifdef MONO_ARCH_LLVM_SUPPORTED
615 * mono_llvm_vcall_trampoline:
617 * This trampoline handles virtual calls when using LLVM.
620 mono_llvm_vcall_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8 *tramp)
624 gpointer *vtable_slot;
628 * We have the method which is called, we need to obtain the vtable slot without
629 * disassembly which is impossible with LLVM.
630 * So we use the this argument.
632 this = mono_arch_get_this_arg_from_call (NULL, mono_method_signature (m), regs, code);
635 slot = mono_method_get_vtable_slot (m);
637 g_assert (slot != -1);
639 g_assert (this->vtable->klass->vtable [slot] == m);
643 g_assert (!m->is_generic);
645 vtable_slot = &(vt->vtable [slot]);
647 return common_call_trampoline (regs, code, m, tramp, vt, vtable_slot, mono_method_needs_static_rgctx_invoke (m, 0));
652 mono_generic_virtual_remoting_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8 *tramp)
654 MonoGenericContext context = { NULL, NULL };
655 MonoMethod *imt_method, *declaring;
658 g_assert (m->is_generic);
661 declaring = mono_method_get_declaring_generic_method (m);
665 if (m->klass->generic_class)
666 context.class_inst = m->klass->generic_class->context.class_inst;
668 g_assert (!m->klass->generic_container);
670 #ifdef MONO_ARCH_HAVE_IMT
671 imt_method = mono_arch_find_imt_method (regs, code);
672 if (imt_method->is_inflated)
673 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
675 m = mono_class_inflate_generic_method (declaring, &context);
676 m = mono_marshal_get_remoting_invoke_with_check (m);
678 addr = mono_compile_method (m);
681 mono_debugger_trampoline_compiled (NULL, m, addr);
687 * mono_aot_trampoline:
689 * This trampoline handles calls made from AOT code. We try to bypass the
690 * normal JIT compilation logic to avoid loading the metadata for the method.
692 #ifdef MONO_ARCH_AOT_SUPPORTED
694 mono_aot_trampoline (mgreg_t *regs, guint8 *code, guint8 *token_info,
699 MonoMethod *method = NULL;
701 gpointer *vtable_slot;
702 gboolean is_got_entry;
704 gboolean need_rgctx_tramp = FALSE;
706 image = *(gpointer*)(gpointer)token_info;
707 token_info += sizeof (gpointer);
708 token = *(guint32*)(gpointer)token_info;
710 addr = mono_aot_get_method_from_token (mono_domain_get (), image, token);
712 method = mono_get_method (image, token, NULL);
715 /* Use the generic code */
716 return mono_magic_trampoline (regs, code, method, tramp);
719 addr = mono_create_ftnptr (mono_domain_get (), addr);
721 vtable_slot = mono_get_vcall_slot_addr (code, regs);
722 g_assert (!vtable_slot);
724 /* This is a normal call through a PLT entry */
725 plt_entry = mono_aot_get_plt_entry (code);
726 g_assert (plt_entry);
728 mono_arch_patch_plt_entry (plt_entry, NULL, regs, addr);
730 is_got_entry = FALSE;
733 * Since AOT code is only used in the root domain,
734 * mono_domain_get () != mono_get_root_domain () means the calling method
735 * is AppDomain:InvokeInDomain, so this is the same check as in
736 * mono_method_same_domain () but without loading the metadata for the method.
738 if ((is_got_entry && (mono_domain_get () == mono_get_root_domain ())) || mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot)) {
739 #ifdef MONO_ARCH_HAVE_IMT
740 gboolean variance_used = FALSE;
742 method = mono_get_method (image, token, NULL);
743 vtable_slot = mono_convert_imt_slot_to_vtable_slot (vtable_slot, regs, code, method, NULL, &need_rgctx_tramp, &variance_used);
752 * mono_aot_plt_trampoline:
754 * This trampoline handles calls made from AOT code through the PLT table.
757 mono_aot_plt_trampoline (mgreg_t *regs, guint8 *code, guint8 *aot_module,
760 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);
786 mono_runtime_class_init (vtable);
789 mono_arch_nullify_plt_entry (plt_entry, regs);
791 mono_arch_nullify_class_init_trampoline (code, regs);
796 * mono_generic_class_init_trampoline:
798 * This method calls mono_runtime_class_init () to run the static constructor
802 mono_generic_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp)
804 mono_runtime_class_init (vtable);
808 mono_rgctx_lazy_fetch_trampoline (mgreg_t *regs, guint8 *code, gpointer data, guint8 *tramp)
810 #ifdef MONO_ARCH_VTABLE_REG
811 static gboolean inited = FALSE;
812 static int num_lookups = 0;
813 guint32 slot = GPOINTER_TO_UINT (data);
814 mgreg_t *r = (mgreg_t*)regs;
815 gpointer arg = (gpointer)(gssize)r [MONO_ARCH_VTABLE_REG];
816 guint32 index = MONO_RGCTX_SLOT_INDEX (slot);
817 gboolean mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
820 mono_counters_register ("RGCTX unmanaged lookups", MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_lookups);
827 return mono_method_fill_runtime_generic_context (arg, index);
829 return mono_class_fill_runtime_generic_context (arg, index);
831 g_assert_not_reached ();
836 mono_monitor_enter_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
838 mono_monitor_enter (obj);
842 mono_monitor_exit_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
844 mono_monitor_exit (obj);
847 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
850 * mono_delegate_trampoline:
852 * This trampoline handles calls made to Delegate:Invoke ().
853 * This is called once the first time a delegate is invoked, so it must be fast.
856 mono_delegate_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp)
858 MonoDomain *domain = mono_domain_get ();
859 MonoDelegate *delegate;
862 MonoMethod *method = NULL;
863 gboolean multicast, callvirt;
864 gboolean need_rgctx_tramp = FALSE;
865 MonoMethod *invoke = tramp_data [0];
866 guint8 *impl_this = tramp_data [1];
867 guint8 *impl_nothis = tramp_data [2];
869 /* Obtain the delegate object according to the calling convention */
872 * Avoid calling mono_get_generic_context_from_code () now since it is expensive,
873 * get_this_arg_from_call will call it if needed.
875 delegate = mono_arch_get_this_arg_from_call (NULL, mono_method_signature (invoke), regs, code);
877 if (delegate->method) {
878 method = delegate->method;
881 * delegate->method_ptr == NULL means the delegate was initialized by
882 * mini_delegate_ctor, while != NULL means it is initialized by
883 * mono_delegate_ctor_with_method (). In both cases, we need to add wrappers
884 * (ctor_with_method () does this, but it doesn't store the wrapper back into
887 if (delegate->target && delegate->target->vtable->klass == mono_defaults.transparent_proxy_class) {
889 if (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class != mono_defaults.com_object_class &&
890 !((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class->is_com_object)
892 method = mono_marshal_get_remoting_invoke (method);
894 else if (mono_method_signature (method)->hasthis && method->klass->valuetype)
895 method = mono_marshal_get_unbox_wrapper (method);
897 ji = mono_jit_info_table_find (domain, mono_get_addr_from_ftnptr (delegate->method_ptr));
901 callvirt = !delegate->target && method && mono_method_signature (method)->hasthis;
903 if (method && method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
904 method = mono_marshal_get_synchronized_wrapper (method);
906 if (method && mono_method_needs_static_rgctx_invoke (method, FALSE))
907 need_rgctx_tramp = TRUE;
910 * If the called address is a trampoline, replace it with the compiled method so
911 * further calls don't have to go through the trampoline.
913 if (method && !callvirt) {
914 /* Avoid the overhead of looking up an already compiled method if possible */
915 if (delegate->method_code && *delegate->method_code) {
916 delegate->method_ptr = *delegate->method_code;
918 delegate->method_ptr = mono_compile_method (method);
919 if (need_rgctx_tramp)
920 delegate->method_ptr = mono_create_static_rgctx_trampoline (method, delegate->method_ptr);
921 if (delegate->method_code)
922 *delegate->method_code = delegate->method_ptr;
923 mono_debugger_trampoline_compiled (NULL, method, delegate->method_ptr);
926 if (need_rgctx_tramp)
927 delegate->method_ptr = mono_create_static_rgctx_trampoline (method, delegate->method_ptr);
930 multicast = ((MonoMulticastDelegate*)delegate)->prev != NULL;
931 if (!multicast && !callvirt) {
932 if (method && (method->flags & METHOD_ATTRIBUTE_STATIC) && mono_method_signature (method)->param_count == mono_method_signature (invoke)->param_count + 1)
933 /* Closed static delegate */
936 code = delegate->target ? impl_this : impl_nothis;
939 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
944 /* The general, unoptimized case */
945 m = mono_marshal_get_delegate_invoke (invoke, delegate);
946 code = mono_compile_method (m);
947 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
948 mono_debugger_trampoline_compiled (NULL, m, delegate->invoke_impl);
956 * mono_get_trampoline_func:
958 * Return the C function which needs to be called by the generic trampoline of type
962 mono_get_trampoline_func (MonoTrampolineType tramp_type)
964 switch (tramp_type) {
965 case MONO_TRAMPOLINE_JIT:
966 case MONO_TRAMPOLINE_JUMP:
967 return mono_magic_trampoline;
968 case MONO_TRAMPOLINE_CLASS_INIT:
969 return mono_class_init_trampoline;
970 case MONO_TRAMPOLINE_GENERIC_CLASS_INIT:
971 return mono_generic_class_init_trampoline;
972 case MONO_TRAMPOLINE_RGCTX_LAZY_FETCH:
973 return mono_rgctx_lazy_fetch_trampoline;
974 #ifdef MONO_ARCH_AOT_SUPPORTED
975 case MONO_TRAMPOLINE_AOT:
976 return mono_aot_trampoline;
977 case MONO_TRAMPOLINE_AOT_PLT:
978 return mono_aot_plt_trampoline;
980 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
981 case MONO_TRAMPOLINE_DELEGATE:
982 return mono_delegate_trampoline;
984 case MONO_TRAMPOLINE_RESTORE_STACK_PROT:
985 return mono_altstack_restore_prot;
986 case MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING:
987 return mono_generic_virtual_remoting_trampoline;
988 case MONO_TRAMPOLINE_MONITOR_ENTER:
989 return mono_monitor_enter_trampoline;
990 case MONO_TRAMPOLINE_MONITOR_EXIT:
991 return mono_monitor_exit_trampoline;
992 #ifdef MONO_ARCH_LLVM_SUPPORTED
993 case MONO_TRAMPOLINE_LLVM_VCALL:
994 return mono_llvm_vcall_trampoline;
997 g_assert_not_reached ();
1003 mono_trampolines_init (void)
1005 InitializeCriticalSection (&trampolines_mutex);
1010 mono_trampoline_code [MONO_TRAMPOLINE_JIT] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_JIT);
1011 mono_trampoline_code [MONO_TRAMPOLINE_JUMP] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_JUMP);
1012 mono_trampoline_code [MONO_TRAMPOLINE_CLASS_INIT] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_CLASS_INIT);
1013 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_CLASS_INIT] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_GENERIC_CLASS_INIT);
1014 mono_trampoline_code [MONO_TRAMPOLINE_RGCTX_LAZY_FETCH] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_RGCTX_LAZY_FETCH);
1015 #ifdef MONO_ARCH_AOT_SUPPORTED
1016 mono_trampoline_code [MONO_TRAMPOLINE_AOT] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_AOT);
1017 mono_trampoline_code [MONO_TRAMPOLINE_AOT_PLT] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_AOT_PLT);
1019 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1020 mono_trampoline_code [MONO_TRAMPOLINE_DELEGATE] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_DELEGATE);
1022 mono_trampoline_code [MONO_TRAMPOLINE_RESTORE_STACK_PROT] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_RESTORE_STACK_PROT);
1023 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING);
1024 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_ENTER] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_MONITOR_ENTER);
1025 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_EXIT] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_MONITOR_EXIT);
1026 #ifdef MONO_ARCH_LLVM_SUPPORTED
1027 mono_trampoline_code [MONO_TRAMPOLINE_LLVM_VCALL] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_LLVM_VCALL);
1032 mono_trampolines_cleanup (void)
1034 if (class_init_hash_addr)
1035 g_hash_table_destroy (class_init_hash_addr);
1037 DeleteCriticalSection (&trampolines_mutex);
1041 mono_get_trampoline_code (MonoTrampolineType tramp_type)
1043 g_assert (mono_trampoline_code [tramp_type]);
1045 return mono_trampoline_code [tramp_type];
1049 mono_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
1052 return mono_aot_create_specific_trampoline (mono_defaults.corlib, arg1, tramp_type, domain, code_len);
1054 return mono_arch_create_specific_trampoline (arg1, tramp_type, domain, code_len);
1058 mono_create_class_init_trampoline (MonoVTable *vtable)
1061 MonoDomain *domain = vtable->domain;
1063 g_assert (!vtable->klass->generic_container);
1065 /* previously created trampoline code */
1066 mono_domain_lock (domain);
1068 g_hash_table_lookup (domain_jit_info (domain)->class_init_trampoline_hash,
1070 mono_domain_unlock (domain);
1074 code = mono_create_specific_trampoline (vtable, MONO_TRAMPOLINE_CLASS_INIT, domain, NULL);
1076 ptr = mono_create_ftnptr (domain, code);
1078 /* store trampoline address */
1079 mono_domain_lock (domain);
1080 g_hash_table_insert (domain_jit_info (domain)->class_init_trampoline_hash,
1082 mono_domain_unlock (domain);
1084 mono_trampolines_lock ();
1085 if (!class_init_hash_addr)
1086 class_init_hash_addr = g_hash_table_new (NULL, NULL);
1087 g_hash_table_insert (class_init_hash_addr, ptr, vtable);
1088 mono_trampolines_unlock ();
1094 mono_create_generic_class_init_trampoline (void)
1096 #ifdef MONO_ARCH_VTABLE_REG
1097 static gpointer code;
1099 mono_trampolines_lock ();
1103 /* get_named_code () might return an ftnptr, but our caller expects a direct pointer */
1104 code = mono_get_addr_from_ftnptr (mono_aot_get_named_code ("generic_class_init_trampoline"));
1106 code = mono_arch_create_generic_class_init_trampoline ();
1109 mono_trampolines_unlock ();
1113 g_assert_not_reached ();
1118 mono_create_jump_trampoline (MonoDomain *domain, MonoMethod *method, gboolean add_sync_wrapper)
1122 guint32 code_size = 0;
1124 code = mono_jit_find_compiled_method_with_jit_info (domain, method, &ji);
1126 * We cannot recover the correct type of a shared generic
1127 * method from its native code address, so we use the
1128 * trampoline instead.
1130 if (code && !ji->has_generic_jit_info)
1133 mono_domain_lock (domain);
1134 code = g_hash_table_lookup (domain_jit_info (domain)->jump_trampoline_hash, method);
1135 mono_domain_unlock (domain);
1139 code = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JUMP, mono_domain_get (), &code_size);
1140 g_assert (code_size);
1142 ji = mono_domain_alloc0 (domain, MONO_SIZEOF_JIT_INFO);
1143 ji->code_start = code;
1144 ji->code_size = code_size;
1145 ji->method = method;
1148 * mono_delegate_ctor needs to find the method metadata from the
1149 * trampoline address, so we save it here.
1152 mono_jit_info_table_add (domain, ji);
1154 mono_domain_lock (domain);
1155 g_hash_table_insert (domain_jit_info (domain)->jump_trampoline_hash, method, ji->code_start);
1156 mono_domain_unlock (domain);
1158 return ji->code_start;
1162 mono_create_jit_trampoline_in_domain (MonoDomain *domain, MonoMethod *method)
1166 if (mono_aot_only) {
1167 /* Avoid creating trampolines if possible */
1168 gpointer code = mono_jit_find_compiled_method (domain, method);
1174 mono_domain_lock (domain);
1175 tramp = g_hash_table_lookup (domain_jit_info (domain)->jit_trampoline_hash, method);
1176 mono_domain_unlock (domain);
1180 tramp = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JIT, domain, NULL);
1182 mono_domain_lock (domain);
1183 g_hash_table_insert (domain_jit_info (domain)->jit_trampoline_hash, method, tramp);
1184 mono_domain_unlock (domain);
1186 mono_jit_stats.method_trampolines++;
1192 mono_create_jit_trampoline (MonoMethod *method)
1194 return mono_create_jit_trampoline_in_domain (mono_domain_get (), method);
1198 mono_create_jit_trampoline_from_token (MonoImage *image, guint32 token)
1202 MonoDomain *domain = mono_domain_get ();
1203 guint8 *buf, *start;
1205 buf = start = mono_domain_code_reserve (domain, 2 * sizeof (gpointer));
1207 *(gpointer*)(gpointer)buf = image;
1208 buf += sizeof (gpointer);
1209 *(guint32*)(gpointer)buf = token;
1211 tramp = mono_create_specific_trampoline (start, MONO_TRAMPOLINE_AOT, domain, NULL);
1213 mono_jit_stats.method_trampolines++;
1219 mono_create_delegate_trampoline (MonoClass *klass)
1221 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1222 MonoDomain *domain = mono_domain_get ();
1224 guint32 code_size = 0;
1225 gpointer *tramp_data;
1228 mono_domain_lock (domain);
1229 ptr = g_hash_table_lookup (domain_jit_info (domain)->delegate_trampoline_hash, klass);
1230 mono_domain_unlock (domain);
1234 // Precompute the delegate invoke impl and pass it to the delegate trampoline
1235 invoke = mono_get_delegate_invoke (klass);
1238 tramp_data = mono_domain_alloc (domain, sizeof (gpointer) * 3);
1239 tramp_data [0] = invoke;
1240 tramp_data [1] = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), TRUE);
1241 tramp_data [2] = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), FALSE);
1243 ptr = mono_create_specific_trampoline (tramp_data, MONO_TRAMPOLINE_DELEGATE, mono_domain_get (), &code_size);
1244 g_assert (code_size);
1246 /* store trampoline address */
1247 mono_domain_lock (domain);
1248 g_hash_table_insert (domain_jit_info (domain)->delegate_trampoline_hash,
1250 mono_domain_unlock (domain);
1259 mono_create_rgctx_lazy_fetch_trampoline (guint32 offset)
1261 static gboolean inited = FALSE;
1262 static int num_trampolines = 0;
1264 gpointer tramp, ptr;
1267 return mono_aot_get_lazy_fetch_trampoline (offset);
1269 mono_trampolines_lock ();
1270 if (rgctx_lazy_fetch_trampoline_hash)
1271 tramp = g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset));
1274 mono_trampolines_unlock ();
1278 tramp = mono_arch_create_rgctx_lazy_fetch_trampoline (offset);
1279 ptr = mono_create_ftnptr (mono_get_root_domain (), tramp);
1281 mono_trampolines_lock ();
1282 if (!rgctx_lazy_fetch_trampoline_hash) {
1283 rgctx_lazy_fetch_trampoline_hash = g_hash_table_new (NULL, NULL);
1284 rgctx_lazy_fetch_trampoline_hash_addr = g_hash_table_new (NULL, NULL);
1286 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset), ptr);
1287 g_assert (offset != -1);
1288 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash_addr, ptr, GUINT_TO_POINTER (offset + 1));
1289 mono_trampolines_unlock ();
1292 mono_counters_register ("RGCTX num lazy fetch trampolines",
1293 MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_trampolines);
1302 mono_create_monitor_enter_trampoline (void)
1304 static gpointer code;
1306 if (mono_aot_only) {
1308 code = mono_aot_get_named_code ("monitor_enter_trampoline");
1312 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
1313 mono_trampolines_lock ();
1316 code = mono_arch_create_monitor_enter_trampoline ();
1318 mono_trampolines_unlock ();
1321 g_assert_not_reached ();
1328 mono_create_monitor_exit_trampoline (void)
1330 static gpointer code;
1332 if (mono_aot_only) {
1334 code = mono_aot_get_named_code ("monitor_exit_trampoline");
1338 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
1339 mono_trampolines_lock ();
1342 code = mono_arch_create_monitor_exit_trampoline ();
1344 mono_trampolines_unlock ();
1347 g_assert_not_reached ();
1352 #ifdef MONO_ARCH_LLVM_SUPPORTED
1354 * mono_create_llvm_vcall_trampoline:
1356 * LLVM emits code for virtual calls which mono_get_vcall_slot is unable to
1357 * decode, i.e. only the final branch address is available:
1358 * mov <offset>(%rax), %rax
1359 * <random code inserted by instruction scheduling>
1362 * To work around this problem, we don't use the common vtable trampoline when
1363 * llvm is enabled. Instead, we use one trampoline per method.
1366 mono_create_llvm_vcall_trampoline (MonoMethod *method)
1371 domain = mono_domain_get ();
1373 mono_domain_lock (domain);
1374 res = g_hash_table_lookup (domain_jit_info (domain)->llvm_vcall_trampoline_hash, method);
1375 mono_domain_unlock (domain);
1379 res = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_LLVM_VCALL, domain, NULL);
1381 mono_domain_lock (domain);
1382 g_hash_table_insert (domain_jit_info (domain)->llvm_vcall_trampoline_hash, method, res);
1383 mono_domain_unlock (domain);
1389 * mono_create_llvm_imt_trampoline:
1391 * LLVM compiled code can't pass in the IMT argument, so we use this trampoline, which
1392 * sets the IMT argument, then branches to the contents of the vtable slot given by
1393 * vt_offset in the vtable which is obtained from the argument list.
1396 mono_create_llvm_imt_trampoline (MonoDomain *domain, MonoMethod *m, int vt_offset)
1398 #ifdef MONO_ARCH_HAVE_LLVM_IMT_TRAMPOLINE
1399 return mono_arch_get_llvm_imt_trampoline (domain, m, vt_offset);
1401 g_assert_not_reached ();
1408 mono_find_class_init_trampoline_by_addr (gconstpointer addr)
1412 mono_trampolines_lock ();
1413 if (class_init_hash_addr)
1414 res = g_hash_table_lookup (class_init_hash_addr, addr);
1417 mono_trampolines_unlock ();
1422 mono_find_rgctx_lazy_fetch_trampoline_by_addr (gconstpointer addr)
1426 mono_trampolines_lock ();
1427 if (rgctx_lazy_fetch_trampoline_hash_addr) {
1428 /* We store the real offset + 1 so we can detect when the lookup fails */
1429 offset = GPOINTER_TO_INT (g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash_addr, addr));
1437 mono_trampolines_unlock ();