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;
23 static guint32 trampoline_calls;
25 #define mono_trampolines_lock() EnterCriticalSection (&trampolines_mutex)
26 #define mono_trampolines_unlock() LeaveCriticalSection (&trampolines_mutex)
27 static CRITICAL_SECTION trampolines_mutex;
30 get_unbox_trampoline (MonoGenericSharingContext *gsctx, MonoMethod *m, gpointer addr, gboolean need_rgctx_tramp)
35 * The unbox trampolines call the method directly, so need to add
36 * an rgctx tramp before them.
38 return mono_create_static_rgctx_trampoline (m, mono_aot_get_unbox_trampoline (m));
40 return mono_aot_get_unbox_trampoline (m);
42 return mono_arch_get_unbox_trampoline (gsctx, m, addr);
46 #ifdef MONO_ARCH_HAVE_STATIC_RGCTX_TRAMPOLINE
54 rgctx_tramp_info_equal (gconstpointer ka, gconstpointer kb)
56 const RgctxTrampInfo *i1 = ka;
57 const RgctxTrampInfo *i2 = kb;
59 if (i1->m == i2->m && i1->addr == i2->addr)
66 rgctx_tramp_info_hash (gconstpointer data)
68 const RgctxTrampInfo *info = data;
70 return GPOINTER_TO_UINT (info->m) ^ GPOINTER_TO_UINT (info->addr);
74 * mono_create_static_rgctx_trampoline:
76 * Return a static rgctx trampoline for M which branches to ADDR which should
77 * point to the compiled code of M.
79 * Static rgctx trampolines are used when a shared generic method which doesn't
80 * have a this argument is called indirectly, ie. from code which can't pass in
81 * the rgctx argument. The trampoline sets the rgctx argument and jumps to the
82 * methods code. These trampolines are similar to the unbox trampolines, they
83 * perform the same task as the static rgctx wrappers, but they are smaller/faster,
84 * and can be made to work with full AOT.
85 * On PPC addr should be an ftnptr and the return value is an ftnptr too.
88 mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr)
93 RgctxTrampInfo tmp_info;
96 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
97 g_assert (((gpointer*)addr) [2] == 0);
100 if (mini_method_get_context (m)->method_inst)
101 ctx = mono_method_lookup_rgctx (mono_class_vtable (mono_domain_get (), m->klass), mini_method_get_context (m)->method_inst);
103 ctx = mono_class_vtable (mono_domain_get (), m->klass);
105 domain = mono_domain_get ();
108 * In the AOT case, addr might point to either the method, or to an unbox trampoline,
109 * so make the hash keyed on the m+addr pair.
111 mono_domain_lock (domain);
112 if (!domain_jit_info (domain)->static_rgctx_trampoline_hash)
113 domain_jit_info (domain)->static_rgctx_trampoline_hash = g_hash_table_new (rgctx_tramp_info_hash, rgctx_tramp_info_equal);
115 tmp_info.addr = addr;
116 res = g_hash_table_lookup (domain_jit_info (domain)->static_rgctx_trampoline_hash,
118 mono_domain_unlock (domain);
123 res = mono_aot_get_static_rgctx_trampoline (ctx, addr);
125 res = mono_arch_get_static_rgctx_trampoline (m, ctx, addr);
127 mono_domain_lock (domain);
128 /* Duplicates inserted while we didn't hold the lock are OK */
129 info = mono_domain_alloc (domain, sizeof (RgctxTrampInfo));
132 g_hash_table_insert (domain_jit_info (domain)->static_rgctx_trampoline_hash, info, res);
133 mono_domain_unlock (domain);
139 mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr)
142 * This shouldn't happen as all arches which support generic sharing support
143 * static rgctx trampolines as well.
145 g_assert_not_reached ();
150 mono_get_vcall_slot_addr (guint8* code, mgreg_t *regs)
154 vt = mono_arch_get_vcall_slot (code, regs, &displacement);
157 return (gpointer*)((char*)vt + displacement);
160 #ifdef MONO_ARCH_HAVE_IMT
163 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)
165 MonoObject *this_argument = mono_arch_get_this_arg_from_call (NULL, mono_method_signature (method), regs, code);
166 MonoVTable *vt = this_argument->vtable;
167 int displacement = slot - ((gpointer*)vt);
169 if (displacement > 0) {
170 /* slot is in the vtable, not in the IMT */
172 printf ("mono_convert_imt_slot_to_vtable_slot: slot %p is in the vtable, not in the IMT\n", slot);
176 MonoMethod *imt_method = mono_arch_find_imt_method (regs, code);
177 int interface_offset;
178 int imt_slot = MONO_IMT_SIZE + displacement;
180 /*This has to be variance aware since imt_method can be from an interface that vt->klass doesn't directly implement*/
181 interface_offset = mono_class_interface_offset_with_variance (vt->klass, imt_method->klass, variance_used);
183 if (interface_offset < 0) {
184 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));
186 mono_vtable_build_imt_slot (vt, mono_method_get_imt_slot (imt_method));
191 if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) {
192 MonoGenericContext context = { NULL, NULL };
195 * Generic virtual method, imt_method contains the inflated interface
196 * method, need to get the inflated impl method.
198 /* imt_method->slot might not be set */
199 impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_declaring_generic_method (imt_method)->slot);
201 if (impl->klass->generic_class)
202 context.class_inst = impl->klass->generic_class->context.class_inst;
203 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
204 impl = mono_class_inflate_generic_method (impl, &context);
206 impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_vtable_slot (imt_method));
209 if (mono_method_needs_static_rgctx_invoke (impl, FALSE))
210 *need_rgctx_tramp = TRUE;
214 printf ("mono_convert_imt_slot_to_vtable_slot: method = %s.%s.%s, imt_method = %s.%s.%s\n",
215 method->klass->name_space, method->klass->name, method->name,
216 imt_method->klass->name_space, imt_method->klass->name, imt_method->name);
219 g_assert (imt_slot < MONO_IMT_SIZE);
220 if (vt->imt_collisions_bitmap & (1 << imt_slot)) {
221 int slot = mono_method_get_vtable_index (imt_method);
223 gpointer *vtable_slot;
225 g_assert (slot != -1);
226 vtable_offset = interface_offset + slot;
227 vtable_slot = & (vt->vtable [vtable_offset]);
229 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);
234 printf ("mono_convert_imt_slot_to_vtable_slot: slot %p[%d] is in the IMT, but not colliding\n", slot, imt_slot);
243 * common_call_trampoline:
245 * The code to handle normal, virtual, and interface method calls and jumps, both
246 * from JITted and LLVM compiled code.
249 common_call_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp, MonoVTable *vt, gpointer *vtable_slot, gboolean need_rgctx_tramp)
251 gpointer addr, compiled_method;
252 gboolean generic_shared = FALSE;
254 MonoMethod *declaring = NULL;
255 MonoMethod *generic_virtual = NULL, *variant_iface = NULL;
257 gboolean proxy = FALSE, variance_used = FALSE;
258 gpointer *orig_vtable_slot;
259 MonoJitInfo *ji = NULL;
263 orig_vtable_slot = vtable_slot;
265 if (m == MONO_FAKE_VTABLE_METHOD) {
271 ji = mono_jit_info_table_find (mono_domain_get (), (char*)code);
273 printf ("Caller: %s\n", mono_method_full_name (ji->method, TRUE));
274 /* Print some debug info */
275 for (i = 0; i < 32; ++i)
276 printf ("0x%x ", code [-32 + i]);
280 displacement = (guint8*)vtable_slot - (guint8*)vt;
281 if (displacement > 0) {
282 int slot = (displacement - G_STRUCT_OFFSET (MonoVTable, vtable)) / sizeof (gpointer);
283 g_assert (slot >= 0);
285 /* Avoid loading metadata or creating a generic vtable if possible */
286 addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, slot);
288 addr = mono_create_ftnptr (mono_domain_get (), addr);
289 if (addr && !vt->klass->valuetype) {
290 vtable_slot = mono_get_vcall_slot_addr (code, regs);
291 if (mono_aot_is_got_entry (code, (guint8*)vtable_slot) || mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot)) {
292 *vtable_slot = mono_get_addr_from_ftnptr (addr);
298 m = mono_class_get_vtable_entry (vt->klass, slot);
299 if (mono_method_needs_static_rgctx_invoke (m, FALSE))
300 need_rgctx_tramp = TRUE;
302 /*g_print ("%s with disp %d: %s at %p\n", vt->klass->name, displacement, m->name, code);*/
304 /* We got here from an interface method: redirect to IMT handling */
305 m = MONO_FAKE_IMT_METHOD;
306 /*g_print ("vtable with disp %d at %p\n", displacement, code);*/
310 /* this is the IMT trampoline */
311 #ifdef MONO_ARCH_HAVE_IMT
312 if (m == MONO_FAKE_IMT_METHOD) {
313 MonoMethod *impl_method;
314 MonoObject *this_arg;
316 /* we get the interface method because mono_convert_imt_slot_to_vtable_slot ()
317 * needs the signature to be able to find the this argument
319 m = mono_arch_find_imt_method (regs, code);
320 vtable_slot = orig_vtable_slot;
321 g_assert (vtable_slot);
323 this_arg = mono_arch_get_this_arg_from_call (NULL, mono_method_signature (m), regs, code);
325 if (this_arg->vtable->klass == mono_defaults.transparent_proxy_class) {
326 /* Use the slow path for now */
328 m = mono_object_get_virtual_method (this_arg, m);
330 vtable_slot = mono_convert_imt_slot_to_vtable_slot (vtable_slot, regs, code, m, &impl_method, &need_rgctx_tramp, &variance_used);
331 /* mono_convert_imt_slot_to_vtable_slot () also gives us the method that is supposed
332 * to be called, so we compile it and go ahead as usual.
334 /*g_print ("imt found method %p (%s) at %p\n", impl_method, impl_method->name, code);*/
335 if (m->is_inflated && ((MonoMethodInflated*)m)->context.method_inst) {
336 /* Generic virtual method */
338 need_rgctx_tramp = TRUE;
339 } else if (variance_used && mono_class_has_variant_generic_params (m->klass)) {
347 #ifdef MONO_ARCH_LLVM_SUPPORTED
348 if (!vtable_slot && code && !need_rgctx_tramp && mono_method_needs_static_rgctx_invoke (m, FALSE)) {
350 * Call this only if the called method is shared, cause it is slow/loads a lot of
353 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
354 if (ji && ji->from_llvm) {
355 /* LLVM can't pass an rgctx arg */
356 need_rgctx_tramp = TRUE;
362 MonoGenericContext context = { NULL, NULL };
363 MonoMethod *declaring;
366 declaring = mono_method_get_declaring_generic_method (m);
370 if (m->klass->generic_class)
371 context.class_inst = m->klass->generic_class->context.class_inst;
373 g_assert (!m->klass->generic_container);
375 #ifdef MONO_ARCH_HAVE_IMT
376 generic_virtual = mono_arch_find_imt_method (regs, code);
378 if (generic_virtual) {
379 g_assert (generic_virtual->is_inflated);
380 context.method_inst = ((MonoMethodInflated*)generic_virtual)->context.method_inst;
383 m = mono_class_inflate_generic_method (declaring, &context);
384 /* FIXME: only do this if the method is sharable */
385 need_rgctx_tramp = TRUE;
386 } else if ((context_used = mono_method_check_context_used (m))) {
387 MonoClass *klass = NULL;
388 MonoMethod *actual_method = NULL;
389 MonoVTable *vt = NULL;
390 MonoGenericInst *method_inst = NULL;
393 generic_shared = TRUE;
397 if (m->is_inflated && mono_method_get_context (m)->method_inst) {
398 #ifdef MONO_ARCH_RGCTX_REG
399 MonoMethodRuntimeGenericContext *mrgctx = (MonoMethodRuntimeGenericContext*)mono_arch_find_static_call_vtable (regs, code);
401 klass = mrgctx->class_vtable->klass;
402 method_inst = mrgctx->method_inst;
404 g_assert_not_reached ();
406 } else if ((m->flags & METHOD_ATTRIBUTE_STATIC) || m->klass->valuetype) {
407 #ifdef MONO_ARCH_RGCTX_REG
408 MonoVTable *vtable = mono_arch_find_static_call_vtable (regs, code);
410 klass = vtable->klass;
412 g_assert_not_reached ();
415 #ifdef MONO_ARCH_HAVE_IMT
416 MonoObject *this_argument = mono_arch_get_this_arg_from_call (NULL, mono_method_signature (m), regs, code);
418 vt = this_argument->vtable;
419 vtable_slot = orig_vtable_slot;
421 g_assert (this_argument->vtable->klass->inited);
422 //mono_class_init (this_argument->vtable->klass);
425 klass = this_argument->vtable->klass->supertypes [m->klass->idepth - 1];
431 g_assert (vtable_slot || klass);
434 int displacement = vtable_slot - ((gpointer*)vt);
436 g_assert_not_reached ();
438 g_assert (displacement > 0);
440 actual_method = vt->klass->vtable [displacement];
444 MonoGenericContext context = { NULL, NULL };
447 declaring = mono_method_get_declaring_generic_method (m);
451 if (klass->generic_class)
452 context.class_inst = klass->generic_class->context.class_inst;
453 else if (klass->generic_container)
454 context.class_inst = klass->generic_container->context.class_inst;
455 context.method_inst = method_inst;
457 actual_method = mono_class_inflate_generic_method (declaring, &context);
459 actual_method = mono_class_get_method_generic (klass, m);
463 g_assert (actual_method);
464 g_assert (actual_method->klass == klass);
466 if (actual_method->is_inflated)
467 declaring = mono_method_get_declaring_generic_method (actual_method);
474 if (m->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) {
478 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
482 /* Avoid recursion */
483 if (!(ji && ji->method->wrapper_type == MONO_WRAPPER_SYNCHRONIZED))
484 m = mono_marshal_get_synchronized_wrapper (m);
487 /* Calls made through delegates on platforms without delegate trampolines */
488 if (!code && mono_method_needs_static_rgctx_invoke (m, FALSE))
489 need_rgctx_tramp = TRUE;
491 addr = compiled_method = mono_compile_method (m);
494 mono_debugger_trampoline_compiled (code, m, addr);
496 if (need_rgctx_tramp)
497 addr = mono_create_static_rgctx_trampoline (m, addr);
499 if (generic_virtual || variant_iface) {
500 MonoMethod *target = generic_virtual ? generic_virtual : variant_iface;
502 vtable_slot = orig_vtable_slot;
503 g_assert (vtable_slot);
505 if (vt->klass->valuetype) /*FIXME is this required variant iface?*/
506 addr = get_unbox_trampoline (mono_get_generic_context_from_code (code), m, addr, need_rgctx_tramp);
508 mono_method_add_generic_virtual_invocation (mono_domain_get (),
515 /* the method was jumped to */
517 MonoDomain *domain = mono_domain_get ();
519 /* Patch the got entries pointing to this method */
521 * We do this here instead of in mono_codegen () to cover the case when m
522 * was loaded from an aot image.
524 if (domain_jit_info (domain)->jump_target_got_slot_hash) {
527 mono_domain_lock (domain);
528 list = g_hash_table_lookup (domain_jit_info (domain)->jump_target_got_slot_hash, m);
530 for (tmp = list; tmp; tmp = tmp->next) {
531 gpointer *got_slot = tmp->data;
534 g_hash_table_remove (domain_jit_info (domain)->jump_target_got_slot_hash, m);
537 mono_domain_unlock (domain);
543 vtable_slot = orig_vtable_slot;
546 gboolean variance_used = FALSE;
547 if (m->klass->valuetype)
548 addr = get_unbox_trampoline (mono_get_generic_context_from_code (code), m, addr, need_rgctx_tramp);
549 g_assert (*vtable_slot);
551 if (!proxy && (mono_aot_is_got_entry (code, (guint8*)vtable_slot) || mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))) {
552 #ifdef MONO_ARCH_HAVE_IMT
553 vtable_slot = mono_convert_imt_slot_to_vtable_slot (vtable_slot, regs, code, m, NULL, &need_rgctx_tramp, &variance_used);
555 *vtable_slot = mono_get_addr_from_ftnptr (addr);
559 guint8 *plt_entry = mono_aot_get_plt_entry (code);
562 mono_arch_patch_plt_entry (plt_entry, NULL, regs, addr);
563 } else if (!generic_shared || (m->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) ||
564 mono_domain_lookup_shared_generic (mono_domain_get (), declaring)) {
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 */
575 MonoJitInfo *target_ji =
576 mono_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method));
579 ji = mono_jit_info_table_find (mono_domain_get (), (char*)code);
581 if (mono_method_same_domain (ji, target_ji))
582 mono_arch_patch_callsite (ji->code_start, code, addr);
591 * mono_magic_trampoline:
593 * This trampoline handles calls from JITted code.
596 mono_magic_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp)
598 gpointer *vtable_slot;
604 if (code && !mono_use_llvm)
605 vt = mono_arch_get_vcall_slot (code, regs, &displacement);
609 vtable_slot = (gpointer*)((char*)vt + displacement);
613 return common_call_trampoline (regs, code, arg, tramp, vt, vtable_slot, FALSE);
616 #ifdef MONO_ARCH_LLVM_SUPPORTED
618 * mono_llvm_vcall_trampoline:
620 * This trampoline handles virtual calls when using LLVM.
623 mono_llvm_vcall_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8 *tramp)
627 gpointer *vtable_slot;
633 * We have the method which is called, we need to obtain the vtable slot without
634 * disassembly which is impossible with LLVM.
635 * So we use the this argument.
637 this = mono_arch_get_this_arg_from_call (NULL, mono_method_signature (m), regs, code);
640 slot = mono_method_get_vtable_slot (m);
642 g_assert (slot != -1);
644 g_assert (this->vtable->klass->vtable [slot] == m);
648 g_assert (!m->is_generic);
650 vtable_slot = &(vt->vtable [slot]);
652 return common_call_trampoline (regs, code, m, tramp, vt, vtable_slot, mono_method_needs_static_rgctx_invoke (m, 0));
657 mono_generic_virtual_remoting_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8 *tramp)
659 MonoGenericContext context = { NULL, NULL };
660 MonoMethod *imt_method, *declaring;
665 g_assert (m->is_generic);
668 declaring = mono_method_get_declaring_generic_method (m);
672 if (m->klass->generic_class)
673 context.class_inst = m->klass->generic_class->context.class_inst;
675 g_assert (!m->klass->generic_container);
677 #ifdef MONO_ARCH_HAVE_IMT
678 imt_method = mono_arch_find_imt_method (regs, code);
679 if (imt_method->is_inflated)
680 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
682 m = mono_class_inflate_generic_method (declaring, &context);
683 m = mono_marshal_get_remoting_invoke_with_check (m);
685 addr = mono_compile_method (m);
688 mono_debugger_trampoline_compiled (NULL, m, addr);
694 * mono_aot_trampoline:
696 * This trampoline handles calls made from AOT code. We try to bypass the
697 * normal JIT compilation logic to avoid loading the metadata for the method.
699 #ifdef MONO_ARCH_AOT_SUPPORTED
701 mono_aot_trampoline (mgreg_t *regs, guint8 *code, guint8 *token_info,
706 MonoMethod *method = NULL;
708 gpointer *vtable_slot;
709 gboolean is_got_entry;
711 gboolean need_rgctx_tramp = FALSE;
715 image = *(gpointer*)(gpointer)token_info;
716 token_info += sizeof (gpointer);
717 token = *(guint32*)(gpointer)token_info;
719 addr = mono_aot_get_method_from_token (mono_domain_get (), image, token);
721 method = mono_get_method (image, token, NULL);
724 /* Use the generic code */
725 return mono_magic_trampoline (regs, code, method, tramp);
728 addr = mono_create_ftnptr (mono_domain_get (), addr);
730 vtable_slot = mono_get_vcall_slot_addr (code, regs);
731 g_assert (!vtable_slot);
733 /* This is a normal call through a PLT entry */
734 plt_entry = mono_aot_get_plt_entry (code);
735 g_assert (plt_entry);
737 mono_arch_patch_plt_entry (plt_entry, NULL, regs, addr);
739 is_got_entry = FALSE;
742 * Since AOT code is only used in the root domain,
743 * mono_domain_get () != mono_get_root_domain () means the calling method
744 * is AppDomain:InvokeInDomain, so this is the same check as in
745 * mono_method_same_domain () but without loading the metadata for the method.
747 if ((is_got_entry && (mono_domain_get () == mono_get_root_domain ())) || mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot)) {
748 #ifdef MONO_ARCH_HAVE_IMT
749 gboolean variance_used = FALSE;
751 method = mono_get_method (image, token, NULL);
752 vtable_slot = mono_convert_imt_slot_to_vtable_slot (vtable_slot, regs, code, method, NULL, &need_rgctx_tramp, &variance_used);
761 * mono_aot_plt_trampoline:
763 * This trampoline handles calls made from AOT code through the PLT table.
766 mono_aot_plt_trampoline (mgreg_t *regs, guint8 *code, guint8 *aot_module,
769 guint32 plt_info_offset = mono_aot_get_plt_info_offset (regs, code);
774 res = mono_aot_plt_resolve (aot_module, plt_info_offset, code);
776 if (mono_loader_get_last_error ())
777 mono_raise_exception (mono_loader_error_prepare_exception (mono_loader_get_last_error ()));
778 // FIXME: Error handling (how ?)
787 * mono_class_init_trampoline:
789 * This method calls mono_runtime_class_init () to run the static constructor
790 * for the type, then patches the caller code so it is not called again.
793 mono_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp)
795 guint8 *plt_entry = mono_aot_get_plt_entry (code);
799 mono_runtime_class_init (vtable);
802 mono_arch_nullify_plt_entry (plt_entry, regs);
804 mono_arch_nullify_class_init_trampoline (code, regs);
809 * mono_generic_class_init_trampoline:
811 * This method calls mono_runtime_class_init () to run the static constructor
815 mono_generic_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp)
819 mono_runtime_class_init (vtable);
823 mono_rgctx_lazy_fetch_trampoline (mgreg_t *regs, guint8 *code, gpointer data, guint8 *tramp)
825 #ifdef MONO_ARCH_VTABLE_REG
826 static gboolean inited = FALSE;
827 static int num_lookups = 0;
828 guint32 slot = GPOINTER_TO_UINT (data);
829 mgreg_t *r = (mgreg_t*)regs;
830 gpointer arg = (gpointer)(gssize)r [MONO_ARCH_VTABLE_REG];
831 guint32 index = MONO_RGCTX_SLOT_INDEX (slot);
832 gboolean mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
837 mono_counters_register ("RGCTX unmanaged lookups", MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_lookups);
844 return mono_method_fill_runtime_generic_context (arg, index);
846 return mono_class_fill_runtime_generic_context (arg, index);
848 g_assert_not_reached ();
853 mono_monitor_enter_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
855 mono_monitor_enter (obj);
859 mono_monitor_exit_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
861 mono_monitor_exit (obj);
864 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
867 * mono_delegate_trampoline:
869 * This trampoline handles calls made to Delegate:Invoke ().
870 * This is called once the first time a delegate is invoked, so it must be fast.
873 mono_delegate_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp)
875 MonoDomain *domain = mono_domain_get ();
876 MonoDelegate *delegate;
879 MonoMethod *method = NULL;
880 gboolean multicast, callvirt;
881 gboolean need_rgctx_tramp = FALSE;
882 MonoMethod *invoke = tramp_data [0];
883 guint8 *impl_this = tramp_data [1];
884 guint8 *impl_nothis = tramp_data [2];
888 /* Obtain the delegate object according to the calling convention */
891 * Avoid calling mono_get_generic_context_from_code () now since it is expensive,
892 * get_this_arg_from_call will call it if needed.
894 delegate = mono_arch_get_this_arg_from_call (NULL, mono_method_signature (invoke), regs, code);
896 if (delegate->method) {
897 method = delegate->method;
900 * delegate->method_ptr == NULL means the delegate was initialized by
901 * mini_delegate_ctor, while != NULL means it is initialized by
902 * mono_delegate_ctor_with_method (). In both cases, we need to add wrappers
903 * (ctor_with_method () does this, but it doesn't store the wrapper back into
906 if (delegate->target && delegate->target->vtable->klass == mono_defaults.transparent_proxy_class) {
908 if (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class != mono_defaults.com_object_class &&
909 !((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class->is_com_object)
911 method = mono_marshal_get_remoting_invoke (method);
913 else if (mono_method_signature (method)->hasthis && method->klass->valuetype)
914 method = mono_marshal_get_unbox_wrapper (method);
916 ji = mono_jit_info_table_find (domain, mono_get_addr_from_ftnptr (delegate->method_ptr));
920 callvirt = !delegate->target && method && mono_method_signature (method)->hasthis;
922 if (method && method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
923 method = mono_marshal_get_synchronized_wrapper (method);
925 if (method && mono_method_needs_static_rgctx_invoke (method, FALSE))
926 need_rgctx_tramp = TRUE;
929 * If the called address is a trampoline, replace it with the compiled method so
930 * further calls don't have to go through the trampoline.
932 if (method && !callvirt) {
933 /* Avoid the overhead of looking up an already compiled method if possible */
934 if (delegate->method_code && *delegate->method_code) {
935 delegate->method_ptr = *delegate->method_code;
937 delegate->method_ptr = mono_compile_method (method);
938 if (need_rgctx_tramp)
939 delegate->method_ptr = mono_create_static_rgctx_trampoline (method, delegate->method_ptr);
940 if (delegate->method_code)
941 *delegate->method_code = delegate->method_ptr;
942 mono_debugger_trampoline_compiled (NULL, method, delegate->method_ptr);
945 if (need_rgctx_tramp)
946 delegate->method_ptr = mono_create_static_rgctx_trampoline (method, delegate->method_ptr);
949 multicast = ((MonoMulticastDelegate*)delegate)->prev != NULL;
950 if (!multicast && !callvirt) {
951 if (method && (method->flags & METHOD_ATTRIBUTE_STATIC) && mono_method_signature (method)->param_count == mono_method_signature (invoke)->param_count + 1)
952 /* Closed static delegate */
955 code = delegate->target ? impl_this : impl_nothis;
958 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
963 /* The general, unoptimized case */
964 m = mono_marshal_get_delegate_invoke (invoke, delegate);
965 code = mono_compile_method (m);
966 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
967 mono_debugger_trampoline_compiled (NULL, m, delegate->invoke_impl);
975 * mono_get_trampoline_func:
977 * Return the C function which needs to be called by the generic trampoline of type
981 mono_get_trampoline_func (MonoTrampolineType tramp_type)
983 switch (tramp_type) {
984 case MONO_TRAMPOLINE_JIT:
985 case MONO_TRAMPOLINE_JUMP:
986 return mono_magic_trampoline;
987 case MONO_TRAMPOLINE_CLASS_INIT:
988 return mono_class_init_trampoline;
989 case MONO_TRAMPOLINE_GENERIC_CLASS_INIT:
990 return mono_generic_class_init_trampoline;
991 case MONO_TRAMPOLINE_RGCTX_LAZY_FETCH:
992 return mono_rgctx_lazy_fetch_trampoline;
993 #ifdef MONO_ARCH_AOT_SUPPORTED
994 case MONO_TRAMPOLINE_AOT:
995 return mono_aot_trampoline;
996 case MONO_TRAMPOLINE_AOT_PLT:
997 return mono_aot_plt_trampoline;
999 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1000 case MONO_TRAMPOLINE_DELEGATE:
1001 return mono_delegate_trampoline;
1003 case MONO_TRAMPOLINE_RESTORE_STACK_PROT:
1004 return mono_altstack_restore_prot;
1005 case MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING:
1006 return mono_generic_virtual_remoting_trampoline;
1007 case MONO_TRAMPOLINE_MONITOR_ENTER:
1008 return mono_monitor_enter_trampoline;
1009 case MONO_TRAMPOLINE_MONITOR_EXIT:
1010 return mono_monitor_exit_trampoline;
1011 #ifdef MONO_ARCH_LLVM_SUPPORTED
1012 case MONO_TRAMPOLINE_LLVM_VCALL:
1013 return mono_llvm_vcall_trampoline;
1016 g_assert_not_reached ();
1022 mono_trampolines_init (void)
1024 InitializeCriticalSection (&trampolines_mutex);
1029 mono_trampoline_code [MONO_TRAMPOLINE_JIT] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_JIT);
1030 mono_trampoline_code [MONO_TRAMPOLINE_JUMP] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_JUMP);
1031 mono_trampoline_code [MONO_TRAMPOLINE_CLASS_INIT] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_CLASS_INIT);
1032 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_CLASS_INIT] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_GENERIC_CLASS_INIT);
1033 mono_trampoline_code [MONO_TRAMPOLINE_RGCTX_LAZY_FETCH] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_RGCTX_LAZY_FETCH);
1034 #ifdef MONO_ARCH_AOT_SUPPORTED
1035 mono_trampoline_code [MONO_TRAMPOLINE_AOT] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_AOT);
1036 mono_trampoline_code [MONO_TRAMPOLINE_AOT_PLT] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_AOT_PLT);
1038 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1039 mono_trampoline_code [MONO_TRAMPOLINE_DELEGATE] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_DELEGATE);
1041 mono_trampoline_code [MONO_TRAMPOLINE_RESTORE_STACK_PROT] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_RESTORE_STACK_PROT);
1042 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING);
1043 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_ENTER] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_MONITOR_ENTER);
1044 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_EXIT] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_MONITOR_EXIT);
1045 #ifdef MONO_ARCH_LLVM_SUPPORTED
1046 mono_trampoline_code [MONO_TRAMPOLINE_LLVM_VCALL] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_LLVM_VCALL);
1049 mono_counters_register ("Calls to trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &trampoline_calls);
1053 mono_trampolines_cleanup (void)
1055 if (class_init_hash_addr)
1056 g_hash_table_destroy (class_init_hash_addr);
1058 DeleteCriticalSection (&trampolines_mutex);
1062 mono_get_trampoline_code (MonoTrampolineType tramp_type)
1064 g_assert (mono_trampoline_code [tramp_type]);
1066 return mono_trampoline_code [tramp_type];
1070 mono_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
1073 return mono_aot_create_specific_trampoline (mono_defaults.corlib, arg1, tramp_type, domain, code_len);
1075 return mono_arch_create_specific_trampoline (arg1, tramp_type, domain, code_len);
1079 mono_create_class_init_trampoline (MonoVTable *vtable)
1082 MonoDomain *domain = vtable->domain;
1084 g_assert (!vtable->klass->generic_container);
1086 /* previously created trampoline code */
1087 mono_domain_lock (domain);
1089 g_hash_table_lookup (domain_jit_info (domain)->class_init_trampoline_hash,
1091 mono_domain_unlock (domain);
1095 code = mono_create_specific_trampoline (vtable, MONO_TRAMPOLINE_CLASS_INIT, domain, NULL);
1097 ptr = mono_create_ftnptr (domain, code);
1099 /* store trampoline address */
1100 mono_domain_lock (domain);
1101 g_hash_table_insert (domain_jit_info (domain)->class_init_trampoline_hash,
1103 mono_domain_unlock (domain);
1105 mono_trampolines_lock ();
1106 if (!class_init_hash_addr)
1107 class_init_hash_addr = g_hash_table_new (NULL, NULL);
1108 g_hash_table_insert (class_init_hash_addr, ptr, vtable);
1109 mono_trampolines_unlock ();
1115 mono_create_generic_class_init_trampoline (void)
1117 #ifdef MONO_ARCH_VTABLE_REG
1118 static gpointer code;
1120 mono_trampolines_lock ();
1124 /* get_named_code () might return an ftnptr, but our caller expects a direct pointer */
1125 code = mono_get_addr_from_ftnptr (mono_aot_get_named_code ("generic_class_init_trampoline"));
1127 code = mono_arch_create_generic_class_init_trampoline ();
1130 mono_trampolines_unlock ();
1134 g_assert_not_reached ();
1139 mono_create_jump_trampoline (MonoDomain *domain, MonoMethod *method, gboolean add_sync_wrapper)
1143 guint32 code_size = 0;
1145 code = mono_jit_find_compiled_method_with_jit_info (domain, method, &ji);
1147 * We cannot recover the correct type of a shared generic
1148 * method from its native code address, so we use the
1149 * trampoline instead.
1151 if (code && !ji->has_generic_jit_info)
1154 mono_domain_lock (domain);
1155 code = g_hash_table_lookup (domain_jit_info (domain)->jump_trampoline_hash, method);
1156 mono_domain_unlock (domain);
1160 code = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JUMP, mono_domain_get (), &code_size);
1161 g_assert (code_size);
1163 ji = mono_domain_alloc0 (domain, MONO_SIZEOF_JIT_INFO);
1164 ji->code_start = code;
1165 ji->code_size = code_size;
1166 ji->method = method;
1169 * mono_delegate_ctor needs to find the method metadata from the
1170 * trampoline address, so we save it here.
1173 mono_jit_info_table_add (domain, ji);
1175 mono_domain_lock (domain);
1176 g_hash_table_insert (domain_jit_info (domain)->jump_trampoline_hash, method, ji->code_start);
1177 mono_domain_unlock (domain);
1179 return ji->code_start;
1183 mono_create_jit_trampoline_in_domain (MonoDomain *domain, MonoMethod *method)
1187 if (mono_aot_only) {
1188 /* Avoid creating trampolines if possible */
1189 gpointer code = mono_jit_find_compiled_method (domain, method);
1195 mono_domain_lock (domain);
1196 tramp = g_hash_table_lookup (domain_jit_info (domain)->jit_trampoline_hash, method);
1197 mono_domain_unlock (domain);
1201 tramp = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JIT, domain, NULL);
1203 mono_domain_lock (domain);
1204 g_hash_table_insert (domain_jit_info (domain)->jit_trampoline_hash, method, tramp);
1205 mono_domain_unlock (domain);
1207 mono_jit_stats.method_trampolines++;
1213 mono_create_jit_trampoline (MonoMethod *method)
1215 return mono_create_jit_trampoline_in_domain (mono_domain_get (), method);
1219 mono_create_jit_trampoline_from_token (MonoImage *image, guint32 token)
1223 MonoDomain *domain = mono_domain_get ();
1224 guint8 *buf, *start;
1226 buf = start = mono_domain_code_reserve (domain, 2 * sizeof (gpointer));
1228 *(gpointer*)(gpointer)buf = image;
1229 buf += sizeof (gpointer);
1230 *(guint32*)(gpointer)buf = token;
1232 tramp = mono_create_specific_trampoline (start, MONO_TRAMPOLINE_AOT, domain, NULL);
1234 mono_jit_stats.method_trampolines++;
1240 mono_create_delegate_trampoline (MonoClass *klass)
1242 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1243 MonoDomain *domain = mono_domain_get ();
1245 guint32 code_size = 0;
1246 gpointer *tramp_data;
1249 mono_domain_lock (domain);
1250 ptr = g_hash_table_lookup (domain_jit_info (domain)->delegate_trampoline_hash, klass);
1251 mono_domain_unlock (domain);
1255 // Precompute the delegate invoke impl and pass it to the delegate trampoline
1256 invoke = mono_get_delegate_invoke (klass);
1259 tramp_data = mono_domain_alloc (domain, sizeof (gpointer) * 3);
1260 tramp_data [0] = invoke;
1261 tramp_data [1] = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), TRUE);
1262 tramp_data [2] = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), FALSE);
1264 ptr = mono_create_specific_trampoline (tramp_data, MONO_TRAMPOLINE_DELEGATE, mono_domain_get (), &code_size);
1265 g_assert (code_size);
1267 /* store trampoline address */
1268 mono_domain_lock (domain);
1269 g_hash_table_insert (domain_jit_info (domain)->delegate_trampoline_hash,
1271 mono_domain_unlock (domain);
1280 mono_create_rgctx_lazy_fetch_trampoline (guint32 offset)
1282 static gboolean inited = FALSE;
1283 static int num_trampolines = 0;
1285 gpointer tramp, ptr;
1288 return mono_aot_get_lazy_fetch_trampoline (offset);
1290 mono_trampolines_lock ();
1291 if (rgctx_lazy_fetch_trampoline_hash)
1292 tramp = g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset));
1295 mono_trampolines_unlock ();
1299 tramp = mono_arch_create_rgctx_lazy_fetch_trampoline (offset);
1300 ptr = mono_create_ftnptr (mono_get_root_domain (), tramp);
1302 mono_trampolines_lock ();
1303 if (!rgctx_lazy_fetch_trampoline_hash) {
1304 rgctx_lazy_fetch_trampoline_hash = g_hash_table_new (NULL, NULL);
1305 rgctx_lazy_fetch_trampoline_hash_addr = g_hash_table_new (NULL, NULL);
1307 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset), ptr);
1308 g_assert (offset != -1);
1309 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash_addr, ptr, GUINT_TO_POINTER (offset + 1));
1310 mono_trampolines_unlock ();
1313 mono_counters_register ("RGCTX num lazy fetch trampolines",
1314 MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_trampolines);
1323 mono_create_monitor_enter_trampoline (void)
1325 static gpointer code;
1327 if (mono_aot_only) {
1329 code = mono_aot_get_named_code ("monitor_enter_trampoline");
1333 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
1334 mono_trampolines_lock ();
1337 code = mono_arch_create_monitor_enter_trampoline ();
1339 mono_trampolines_unlock ();
1342 g_assert_not_reached ();
1349 mono_create_monitor_exit_trampoline (void)
1351 static gpointer code;
1353 if (mono_aot_only) {
1355 code = mono_aot_get_named_code ("monitor_exit_trampoline");
1359 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
1360 mono_trampolines_lock ();
1363 code = mono_arch_create_monitor_exit_trampoline ();
1365 mono_trampolines_unlock ();
1368 g_assert_not_reached ();
1373 #ifdef MONO_ARCH_LLVM_SUPPORTED
1375 * mono_create_llvm_vcall_trampoline:
1377 * LLVM emits code for virtual calls which mono_get_vcall_slot is unable to
1378 * decode, i.e. only the final branch address is available:
1379 * mov <offset>(%rax), %rax
1380 * <random code inserted by instruction scheduling>
1383 * To work around this problem, we don't use the common vtable trampoline when
1384 * llvm is enabled. Instead, we use one trampoline per method.
1387 mono_create_llvm_vcall_trampoline (MonoMethod *method)
1392 domain = mono_domain_get ();
1394 mono_domain_lock (domain);
1395 res = g_hash_table_lookup (domain_jit_info (domain)->llvm_vcall_trampoline_hash, method);
1396 mono_domain_unlock (domain);
1400 res = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_LLVM_VCALL, domain, NULL);
1402 mono_domain_lock (domain);
1403 g_hash_table_insert (domain_jit_info (domain)->llvm_vcall_trampoline_hash, method, res);
1404 mono_domain_unlock (domain);
1410 * mono_create_llvm_imt_trampoline:
1412 * LLVM compiled code can't pass in the IMT argument, so we use this trampoline, which
1413 * sets the IMT argument, then branches to the contents of the vtable slot given by
1414 * vt_offset in the vtable which is obtained from the argument list.
1417 mono_create_llvm_imt_trampoline (MonoDomain *domain, MonoMethod *m, int vt_offset)
1419 #ifdef MONO_ARCH_HAVE_LLVM_IMT_TRAMPOLINE
1420 return mono_arch_get_llvm_imt_trampoline (domain, m, vt_offset);
1422 g_assert_not_reached ();
1429 mono_find_class_init_trampoline_by_addr (gconstpointer addr)
1433 mono_trampolines_lock ();
1434 if (class_init_hash_addr)
1435 res = g_hash_table_lookup (class_init_hash_addr, addr);
1438 mono_trampolines_unlock ();
1443 mono_find_rgctx_lazy_fetch_trampoline_by_addr (gconstpointer addr)
1447 mono_trampolines_lock ();
1448 if (rgctx_lazy_fetch_trampoline_hash_addr) {
1449 /* We store the real offset + 1 so we can detect when the lookup fails */
1450 offset = GPOINTER_TO_INT (g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash_addr, addr));
1458 mono_trampolines_unlock ();