2 * (C) 2003 Ximian, Inc.
3 * (C) 2003-2011 Novell, Inc.
4 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
9 #include <mono/metadata/appdomain.h>
10 #include <mono/metadata/metadata-internals.h>
11 #include <mono/metadata/marshal.h>
12 #include <mono/metadata/tabledefs.h>
13 #include <mono/utils/mono-counters.h>
14 #include <mono/utils/mono-error-internals.h>
15 #include <mono/utils/mono-membar.h>
16 #include <mono/utils/mono-compiler.h>
21 * Address of the trampoline code. This is used by the debugger to check
22 * whether a method is a trampoline.
24 guint8* mono_trampoline_code [MONO_TRAMPOLINE_NUM];
26 static GHashTable *class_init_hash_addr;
27 static GHashTable *rgctx_lazy_fetch_trampoline_hash;
28 static GHashTable *rgctx_lazy_fetch_trampoline_hash_addr;
29 static guint32 trampoline_calls, jit_trampolines, unbox_trampolines, static_rgctx_trampolines;
31 #define mono_trampolines_lock() mono_mutex_lock (&trampolines_mutex)
32 #define mono_trampolines_unlock() mono_mutex_unlock (&trampolines_mutex)
33 static mono_mutex_t trampolines_mutex;
35 #ifdef MONO_ARCH_GSHARED_SUPPORTED
43 rgctx_tramp_info_equal (gconstpointer ka, gconstpointer kb)
45 const RgctxTrampInfo *i1 = ka;
46 const RgctxTrampInfo *i2 = kb;
48 if (i1->m == i2->m && i1->addr == i2->addr)
55 rgctx_tramp_info_hash (gconstpointer data)
57 const RgctxTrampInfo *info = data;
59 return GPOINTER_TO_UINT (info->m) ^ GPOINTER_TO_UINT (info->addr);
63 * mono_create_static_rgctx_trampoline:
64 * @m: the mono method to create a trampoline for
65 * @addr: the address to jump to (where the compiled code for M lives)
67 * Creates a static rgctx trampoline for M which branches to ADDR which should
68 * point to the compiled code of M.
70 * Static rgctx trampolines are used when a shared generic method which doesn't
71 * have a this argument is called indirectly, ie. from code which can't pass in
72 * the rgctx argument. The trampoline sets the rgctx argument and jumps to the
73 * methods code. These trampolines are similar to the unbox trampolines, they
74 * perform the same task as the static rgctx wrappers, but they are smaller/faster,
75 * and can be made to work with full AOT.
77 * On PPC addr should be an ftnptr and the return value is an ftnptr too.
79 * Returns the generated static rgctx trampoline.
82 mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr)
87 RgctxTrampInfo tmp_info;
90 #ifdef PPC_USES_FUNCTION_DESCRIPTOR
91 g_assert (((gpointer*)addr) [2] == 0);
94 ctx = mini_method_get_rgctx (m);
96 domain = mono_domain_get ();
99 * In the AOT case, addr might point to either the method, or to an unbox trampoline,
100 * so make the hash keyed on the m+addr pair.
102 mono_domain_lock (domain);
103 if (!domain_jit_info (domain)->static_rgctx_trampoline_hash)
104 domain_jit_info (domain)->static_rgctx_trampoline_hash = g_hash_table_new (rgctx_tramp_info_hash, rgctx_tramp_info_equal);
106 tmp_info.addr = addr;
107 res = g_hash_table_lookup (domain_jit_info (domain)->static_rgctx_trampoline_hash,
109 mono_domain_unlock (domain);
114 res = mono_aot_get_static_rgctx_trampoline (ctx, addr);
116 res = mono_arch_get_static_rgctx_trampoline (m, ctx, addr);
118 mono_domain_lock (domain);
119 /* Duplicates inserted while we didn't hold the lock are OK */
120 info = mono_domain_alloc (domain, sizeof (RgctxTrampInfo));
123 g_hash_table_insert (domain_jit_info (domain)->static_rgctx_trampoline_hash, info, res);
124 mono_domain_unlock (domain);
126 static_rgctx_trampolines ++;
132 mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr)
135 * This shouldn't happen as all arches which support generic sharing support
136 * static rgctx trampolines as well.
138 g_assert_not_reached ();
143 * Either IMPL_METHOD or AOT_ADDR will be set on return.
145 * MONO_NEVER_INLINE :
146 * This works against problems when compiling with gcc 4.6 on arm. The 'then' part of
147 * this line gets executed, even when the condition is false:
148 * if (impl && mono_method_needs_static_rgctx_invoke (impl, FALSE))
149 * *need_rgctx_tramp = TRUE;
151 static MONO_NEVER_INLINE gpointer*
152 mono_convert_imt_slot_to_vtable_slot (gpointer* slot, mgreg_t *regs, guint8 *code, MonoMethod *method, gboolean lookup_aot, MonoMethod **impl_method, gboolean *need_rgctx_tramp, gboolean *variance_used, gpointer *aot_addr)
154 MonoObject *this_argument = mono_arch_get_this_arg_from_call (regs, code);
155 MonoVTable *vt = this_argument->vtable;
156 int displacement = slot - ((gpointer*)vt);
158 if (displacement > 0) {
159 /* slot is in the vtable, not in the IMT */
161 printf ("mono_convert_imt_slot_to_vtable_slot: slot %p is in the vtable, not in the IMT\n", slot);
165 MonoMethod *imt_method = mono_arch_find_imt_method (regs, code);
167 int interface_offset;
168 int imt_slot = MONO_IMT_SIZE + displacement;
170 /*This has to be variance aware since imt_method can be from an interface that vt->klass doesn't directly implement*/
171 interface_offset = mono_class_interface_offset_with_variance (vt->klass, imt_method->klass, variance_used);
173 if (interface_offset < 0) {
174 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));
176 mono_vtable_build_imt_slot (vt, mono_method_get_imt_slot (imt_method));
178 if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) {
180 MonoGenericContext context = { NULL, NULL };
183 * Generic virtual method, imt_method contains the inflated interface
184 * method, need to get the inflated impl method.
186 /* imt_method->slot might not be set */
187 impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_declaring_generic_method (imt_method)->slot);
189 if (impl->klass->generic_class)
190 context.class_inst = impl->klass->generic_class->context.class_inst;
191 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
192 impl = mono_class_inflate_generic_method_checked (impl, &context, &error);
193 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */
195 /* Avoid loading metadata or creating a generic vtable if possible */
196 if (lookup_aot && !vt->klass->valuetype)
197 *aot_addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, interface_offset + mono_method_get_vtable_slot (imt_method));
203 impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_vtable_slot (imt_method));
206 if (impl && mono_method_needs_static_rgctx_invoke (impl, FALSE))
207 *need_rgctx_tramp = TRUE;
208 if (impl && impl->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED) {
209 WrapperInfo *info = mono_marshal_get_wrapper_info (impl);
211 if (info && info->subtype == WRAPPER_SUBTYPE_GENERIC_ARRAY_HELPER) {
212 *need_rgctx_tramp = TRUE;
218 printf ("mono_convert_imt_slot_to_vtable_slot: method = %s.%s.%s, imt_method = %s.%s.%s\n",
219 method->klass->name_space, method->klass->name, method->name,
220 imt_method->klass->name_space, imt_method->klass->name, imt_method->name);
223 g_assert (imt_slot < MONO_IMT_SIZE);
224 if (vt->imt_collisions_bitmap & (1 << imt_slot)) {
225 int slot = mono_method_get_vtable_index (imt_method);
227 gpointer *vtable_slot;
229 g_assert (slot != -1);
230 vtable_offset = interface_offset + slot;
231 vtable_slot = & (vt->vtable [vtable_offset]);
233 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);
238 printf ("mono_convert_imt_slot_to_vtable_slot: slot %p[%d] is in the IMT, but not colliding\n", slot, imt_slot);
246 * This is a super-ugly hack to fix bug #616463.
248 * The problem is that we don't always set is_generic for generic
249 * method definitions. See the comment at the end of
250 * mono_class_inflate_generic_method_full_checked() in class.c.
253 is_generic_method_definition (MonoMethod *m)
255 MonoGenericContext *context;
261 context = mono_method_get_context (m);
262 if (!context->method_inst)
264 if (context->method_inst == mono_method_get_generic_container (((MonoMethodInflated*)m)->declaring)->context.method_inst)
270 mini_jit_info_is_gsharedvt (MonoJitInfo *ji)
272 if (ji && ji->has_generic_jit_info && (mono_jit_info_get_generic_sharing_context (ji)->var_is_vt ||
273 mono_jit_info_get_generic_sharing_context (ji)->mvar_is_vt))
280 * mini_add_method_trampoline:
281 * @orig_method: the method the caller originally called i.e. an iface method, or NULL.
284 * @add_static_rgctx_tramp: adds a static rgctx trampoline
285 * @add_unbox_tramp: adds an unboxing trampoline
287 * Add static rgctx/gsharedvt_in/unbox trampolines to
288 * M/COMPILED_METHOD if needed.
290 * Returns the trampoline address, or COMPILED_METHOD if no trampoline
294 mini_add_method_trampoline (MonoMethod *orig_method, MonoMethod *m, gpointer compiled_method, gboolean add_static_rgctx_tramp, gboolean add_unbox_tramp)
296 gpointer addr = compiled_method;
297 gboolean callee_gsharedvt, callee_array_helper;
298 MonoMethod *jmethod = NULL;
301 // FIXME: This loads information from AOT (perf problem)
302 ji = mini_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method), NULL);
303 callee_gsharedvt = mini_jit_info_is_gsharedvt (ji);
305 callee_array_helper = FALSE;
306 if (m->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED) {
307 WrapperInfo *info = mono_marshal_get_wrapper_info (m);
310 * generic array helpers.
311 * Have to replace the wrappers with the original generic instances.
313 if (info && info->subtype == WRAPPER_SUBTYPE_GENERIC_ARRAY_HELPER) {
314 callee_array_helper = TRUE;
315 m = info->d.generic_array_helper.method;
317 } else if (m->wrapper_type == MONO_WRAPPER_UNKNOWN) {
318 WrapperInfo *info = mono_marshal_get_wrapper_info (m);
320 /* Same for synchronized inner wrappers */
321 if (info && info->subtype == WRAPPER_SUBTYPE_SYNCHRONIZED_INNER) {
322 m = info->d.synchronized_inner.method;
329 if (callee_gsharedvt)
330 g_assert (m->is_inflated);
332 addr = compiled_method;
334 if (add_unbox_tramp) {
336 * The unbox trampolines call the method directly, so need to add
337 * an rgctx tramp before them.
340 addr = mono_aot_get_unbox_trampoline (m);
342 unbox_trampolines ++;
343 addr = mono_arch_get_unbox_trampoline (m, addr);
348 jmethod = jinfo_get_method (ji);
349 if (callee_gsharedvt && mini_is_gsharedvt_variable_signature (mono_method_signature (jmethod))) {
350 MonoGenericSharingContext *gsctx;
351 MonoMethodSignature *sig, *gsig;
353 /* Here m is a generic instance, while ji->method is the gsharedvt method implementing it */
355 /* Call from normal/gshared code to gsharedvt code with variable signature */
356 gsctx = mono_jit_info_get_generic_sharing_context (ji);
358 sig = mono_method_signature (m);
359 gsig = mono_method_signature (jmethod);
361 addr = mini_get_gsharedvt_wrapper (TRUE, addr, sig, gsig, gsctx, -1, FALSE);
363 //printf ("IN: %s\n", mono_method_full_name (m, TRUE));
366 if (callee_array_helper) {
367 add_static_rgctx_tramp = FALSE;
368 /* FIXME: ji->from_aot is not set for llvm methods */
369 if (ji && (ji->from_aot || mono_aot_only)) {
370 /* In AOT mode, compiled_method points to one of the InternalArray methods in Array. */
371 if (mono_method_needs_static_rgctx_invoke (jinfo_get_method (ji), TRUE))
372 add_static_rgctx_tramp = TRUE;
376 if (add_static_rgctx_tramp)
377 addr = mono_create_static_rgctx_trampoline (m, addr);
383 * common_call_trampoline:
385 * The code to handle normal, virtual, and interface method calls and jumps, both
386 * from JITted and LLVM compiled code.
389 common_call_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8* tramp, MonoVTable *vt, gpointer *vtable_slot, gboolean need_rgctx_tramp)
391 gpointer addr, compiled_method;
392 gboolean generic_shared = FALSE;
393 gboolean need_unbox_tramp = FALSE;
394 MonoMethod *declaring = NULL;
395 MonoMethod *generic_virtual = NULL, *variant_iface = NULL, *orig_method = NULL;
397 gboolean virtual, variance_used = FALSE;
398 gpointer *orig_vtable_slot, *vtable_slot_to_patch = NULL;
399 MonoJitInfo *ji = NULL;
401 virtual = (gpointer)vtable_slot > (gpointer)vt;
403 orig_vtable_slot = vtable_slot;
404 vtable_slot_to_patch = vtable_slot;
407 if (vt && (gpointer)vtable_slot < (gpointer)vt) {
408 MonoMethod *impl_method = NULL;
409 MonoObject *this_arg;
411 /* we get the interface method because mono_convert_imt_slot_to_vtable_slot ()
412 * needs the signature to be able to find the this argument
414 m = mono_arch_find_imt_method (regs, code);
415 vtable_slot = orig_vtable_slot;
416 g_assert (vtable_slot);
420 this_arg = mono_arch_get_this_arg_from_call (regs, code);
422 if (mono_object_is_transparent_proxy (this_arg)) {
423 /* Use the slow path for now */
424 m = mono_object_get_virtual_method (this_arg, m);
425 vtable_slot_to_patch = NULL;
429 mono_class_interface_offset_with_variance (vt->klass, m->klass, &variance_used);
431 if (m->is_inflated && ((MonoMethodInflated*)m)->context.method_inst) {
432 /* Generic virtual method */
434 need_rgctx_tramp = TRUE;
435 } else if (variance_used && mono_class_has_variant_generic_params (m->klass)) {
440 /* We can only use the AOT compiled code if we don't require further processing */
441 lookup_aot = !generic_virtual & !variant_iface;
442 vtable_slot = mono_convert_imt_slot_to_vtable_slot (vtable_slot, regs, code, m, lookup_aot, &impl_method, &need_rgctx_tramp, &variance_used, &addr);
443 /* This is the vcall slot which gets called through the IMT thunk */
444 vtable_slot_to_patch = vtable_slot;
445 /* mono_convert_imt_slot_to_vtable_slot () also gives us the method that is supposed
446 * to be called, so we compile it and go ahead as usual.
448 /*g_print ("imt found method %p (%s) at %p\n", impl_method, impl_method->name, code);*/
452 * We found AOT compiled code for the method, skip the rest.
454 if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
457 return mono_create_ftnptr (mono_domain_get (), addr);
465 * The virtual check is needed because is_generic_method_definition (m) could
466 * return TRUE for methods used in IMT calls too.
468 if (virtual && is_generic_method_definition (m)) {
470 MonoGenericContext context = { NULL, NULL };
471 MonoMethod *declaring;
474 declaring = mono_method_get_declaring_generic_method (m);
478 if (m->klass->generic_class)
479 context.class_inst = m->klass->generic_class->context.class_inst;
481 g_assert (!m->klass->generic_container);
483 generic_virtual = mono_arch_find_imt_method (regs, code);
484 if (generic_virtual) {
485 g_assert (generic_virtual->is_inflated);
486 context.method_inst = ((MonoMethodInflated*)generic_virtual)->context.method_inst;
489 m = mono_class_inflate_generic_method_checked (declaring, &context, &error);
490 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */
491 /* FIXME: only do this if the method is sharable */
492 need_rgctx_tramp = TRUE;
493 } else if ((context_used = mono_method_check_context_used (m))) {
494 MonoClass *klass = NULL;
495 MonoMethod *actual_method = NULL;
496 MonoVTable *vt = NULL;
497 MonoGenericInst *method_inst = NULL;
500 generic_shared = TRUE;
504 if (m->is_inflated && mono_method_get_context (m)->method_inst) {
505 #ifdef MONO_ARCH_RGCTX_REG
506 MonoMethodRuntimeGenericContext *mrgctx = (MonoMethodRuntimeGenericContext*)mono_arch_find_static_call_vtable (regs, code);
508 klass = mrgctx->class_vtable->klass;
509 method_inst = mrgctx->method_inst;
511 g_assert_not_reached ();
513 } else if ((m->flags & METHOD_ATTRIBUTE_STATIC) || m->klass->valuetype) {
514 #ifdef MONO_ARCH_RGCTX_REG
515 MonoVTable *vtable = mono_arch_find_static_call_vtable (regs, code);
517 klass = vtable->klass;
519 g_assert_not_reached ();
522 MonoObject *this_argument = mono_arch_get_this_arg_from_call (regs, code);
524 vt = this_argument->vtable;
525 vtable_slot = orig_vtable_slot;
527 g_assert (this_argument->vtable->klass->inited);
528 //mono_class_init (this_argument->vtable->klass);
531 mono_class_setup_supertypes (this_argument->vtable->klass);
532 klass = this_argument->vtable->klass->supertypes [m->klass->idepth - 1];
536 g_assert (vtable_slot || klass);
539 int displacement = vtable_slot - ((gpointer*)vt);
541 g_assert_not_reached ();
543 g_assert (displacement > 0);
545 actual_method = vt->klass->vtable [displacement];
548 if (method_inst || m->wrapper_type) {
550 MonoGenericContext context = { NULL, NULL };
553 declaring = mono_method_get_declaring_generic_method (m);
557 if (klass->generic_class)
558 context.class_inst = klass->generic_class->context.class_inst;
559 else if (klass->generic_container)
560 context.class_inst = klass->generic_container->context.class_inst;
561 context.method_inst = method_inst;
563 actual_method = mono_class_inflate_generic_method_checked (declaring, &context, &error);
564 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */
566 actual_method = mono_class_get_method_generic (klass, m);
570 g_assert (actual_method);
571 g_assert (actual_method->klass == klass);
573 if (actual_method->is_inflated)
574 declaring = mono_method_get_declaring_generic_method (actual_method);
581 if (m->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) {
582 m = mono_marshal_get_synchronized_wrapper (m);
583 need_rgctx_tramp = FALSE;
586 /* Calls made through delegates on platforms without delegate trampolines */
587 if (!code && mono_method_needs_static_rgctx_invoke (m, FALSE))
588 need_rgctx_tramp = TRUE;
590 addr = compiled_method = mono_compile_method (m);
593 if (generic_virtual || variant_iface) {
594 if (vt->klass->valuetype) /*FIXME is this required variant iface?*/
595 need_unbox_tramp = TRUE;
596 } else if (orig_vtable_slot) {
597 if (m->klass->valuetype)
598 need_unbox_tramp = TRUE;
601 addr = mini_add_method_trampoline (orig_method, m, compiled_method, need_rgctx_tramp, need_unbox_tramp);
603 if (generic_virtual || variant_iface) {
604 MonoMethod *target = generic_virtual ? generic_virtual : variant_iface;
606 vtable_slot = orig_vtable_slot;
607 g_assert (vtable_slot);
609 mono_method_add_generic_virtual_invocation (mono_domain_get (),
616 /* the method was jumped to */
618 MonoDomain *domain = mono_domain_get ();
620 /* Patch the got entries pointing to this method */
622 * We do this here instead of in mono_codegen () to cover the case when m
623 * was loaded from an aot image.
625 if (domain_jit_info (domain)->jump_target_got_slot_hash) {
628 mono_domain_lock (domain);
629 list = g_hash_table_lookup (domain_jit_info (domain)->jump_target_got_slot_hash, m);
631 for (tmp = list; tmp; tmp = tmp->next) {
632 gpointer *got_slot = tmp->data;
635 g_hash_table_remove (domain_jit_info (domain)->jump_target_got_slot_hash, m);
638 mono_domain_unlock (domain);
644 vtable_slot = orig_vtable_slot;
647 if (vtable_slot_to_patch && (mono_aot_is_got_entry (code, (guint8*)vtable_slot_to_patch) || mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot_to_patch))) {
648 g_assert (*vtable_slot_to_patch);
649 *vtable_slot_to_patch = mono_get_addr_from_ftnptr (addr);
653 guint8 *plt_entry = mono_aot_get_plt_entry (code);
654 gboolean no_patch = FALSE;
655 MonoJitInfo *target_ji;
658 if (generic_shared) {
660 mini_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method), NULL);
662 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
664 if (ji && target_ji && generic_shared && ji->has_generic_jit_info && !target_ji->has_generic_jit_info) {
669 mono_aot_patch_plt_entry (code, plt_entry, NULL, regs, addr);
671 if (generic_shared) {
672 if (m->wrapper_type != MONO_WRAPPER_NONE)
673 m = mono_marshal_method_from_wrapper (m);
674 //g_assert (mono_method_is_generic_sharable (m, FALSE));
677 /* Patch calling code */
679 mini_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method), NULL);
681 ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL);
683 if (ji && target_ji && generic_shared && ji->has_generic_jit_info && !target_ji->has_generic_jit_info) {
685 * Can't patch the call as the caller is gshared, but the callee is not. Happens when
686 * generic sharing fails.
687 * FIXME: Performance problem.
692 if (!no_patch && mono_method_same_domain (ji, target_ji))
693 mono_arch_patch_callsite (ji->code_start, code, addr);
701 * mono_magic_trampoline:
703 * This trampoline handles normal calls from JITted code.
706 mono_magic_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp)
710 return common_call_trampoline (regs, code, arg, tramp, NULL, NULL, FALSE);
714 * mono_vcall_trampoline:
716 * This trampoline handles virtual calls.
719 mono_vcall_trampoline (mgreg_t *regs, guint8 *code, int slot, guint8 *tramp)
723 gpointer *vtable_slot;
725 gboolean need_rgctx_tramp = FALSE;
731 * We need to obtain the following pieces of information:
732 * - the method which needs to be compiled.
734 * We use one vtable trampoline per vtable slot index, so we need only the vtable,
735 * the other two can be computed from the vtable + the slot index.
739 * Obtain the vtable from the 'this' arg.
741 this = mono_arch_get_this_arg_from_call (regs, code);
747 /* Normal virtual call */
748 vtable_slot = &(vt->vtable [slot]);
750 /* Avoid loading metadata or creating a generic vtable if possible */
751 addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, slot);
752 if (addr && !vt->klass->valuetype) {
753 if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot))
756 return mono_create_ftnptr (mono_domain_get (), addr);
761 * is_generic_method_definition() above) also
762 * goes away if we do a
763 * mono_class_setup_vtable (vt->klass) here,
764 * because we then inflate the method
765 * correctly, put it in the cache, and the
766 * "wrong" inflation invocation still looks up
767 * the correctly inflated method.
769 * The hack above seems more stable and
772 m = mono_class_get_vtable_entry (vt->klass, slot);
774 need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (m, 0);
777 vtable_slot = &(((gpointer*)vt) [slot]);
780 need_rgctx_tramp = FALSE;
783 return common_call_trampoline (regs, code, m, tramp, vt, vtable_slot, need_rgctx_tramp);
786 #ifndef DISABLE_REMOTING
788 mono_generic_virtual_remoting_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8 *tramp)
791 MonoGenericContext context = { NULL, NULL };
792 MonoMethod *imt_method, *declaring;
797 g_assert (m->is_generic);
800 declaring = mono_method_get_declaring_generic_method (m);
804 if (m->klass->generic_class)
805 context.class_inst = m->klass->generic_class->context.class_inst;
807 g_assert (!m->klass->generic_container);
809 imt_method = mono_arch_find_imt_method (regs, code);
810 if (imt_method->is_inflated)
811 context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst;
812 m = mono_class_inflate_generic_method_checked (declaring, &context, &error);
813 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */;
814 m = mono_marshal_get_remoting_invoke_with_check (m);
816 addr = mono_compile_method (m);
824 * mono_aot_trampoline:
826 * This trampoline handles calls made from AOT code. We try to bypass the
827 * normal JIT compilation logic to avoid loading the metadata for the method.
829 #ifdef MONO_ARCH_AOT_SUPPORTED
831 mono_aot_trampoline (mgreg_t *regs, guint8 *code, guint8 *token_info,
836 MonoMethod *method = NULL;
842 image = *(gpointer*)(gpointer)token_info;
843 token_info += sizeof (gpointer);
844 token = *(guint32*)(gpointer)token_info;
846 addr = mono_aot_get_method_from_token (mono_domain_get (), image, token);
848 method = mono_get_method (image, token, NULL);
851 /* Use the generic code */
852 return mono_magic_trampoline (regs, code, method, tramp);
855 addr = mono_create_ftnptr (mono_domain_get (), addr);
857 /* This is a normal call through a PLT entry */
858 plt_entry = mono_aot_get_plt_entry (code);
859 g_assert (plt_entry);
861 mono_aot_patch_plt_entry (code, plt_entry, NULL, regs, addr);
867 * mono_aot_plt_trampoline:
869 * This trampoline handles calls made from AOT code through the PLT table.
872 mono_aot_plt_trampoline (mgreg_t *regs, guint8 *code, guint8 *aot_module,
875 guint32 plt_info_offset = mono_aot_get_plt_info_offset (regs, code);
880 res = mono_aot_plt_resolve (aot_module, plt_info_offset, code);
882 if (mono_loader_get_last_error ())
883 mono_raise_exception (mono_loader_error_prepare_exception (mono_loader_get_last_error ()));
884 // FIXME: Error handling (how ?)
893 * mono_class_init_trampoline:
895 * This method calls mono_runtime_class_init () to run the static constructor
896 * for the type, then patches the caller code so it is not called again.
899 mono_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp)
901 guint8 *plt_entry = mono_aot_get_plt_entry (code);
905 mono_runtime_class_init (vtable);
907 if (vtable->initialized) {
909 mono_aot_patch_plt_entry (code, plt_entry, NULL, regs, mini_get_nullified_class_init_trampoline ());
911 mono_arch_nullify_class_init_trampoline (code, regs);
916 * mono_generic_class_init_trampoline:
918 * This method calls mono_runtime_class_init () to run the static constructor
922 mono_generic_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp)
926 mono_runtime_class_init (vtable);
930 mono_rgctx_lazy_fetch_trampoline (mgreg_t *regs, guint8 *code, gpointer data, guint8 *tramp)
932 #ifdef MONO_ARCH_VTABLE_REG
933 static gboolean inited = FALSE;
934 static int num_lookups = 0;
935 guint32 slot = GPOINTER_TO_UINT (data);
936 mgreg_t *r = (mgreg_t*)regs;
937 gpointer arg = (gpointer)(gssize)r [MONO_ARCH_VTABLE_REG];
938 guint32 index = MONO_RGCTX_SLOT_INDEX (slot);
939 gboolean mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
944 mono_counters_register ("RGCTX unmanaged lookups", MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_lookups);
951 return mono_method_fill_runtime_generic_context (arg, code, index);
953 return mono_class_fill_runtime_generic_context (arg, code, index);
955 g_assert_not_reached ();
960 mono_monitor_enter_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
962 mono_monitor_enter (obj);
966 mono_monitor_enter_v4_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
968 #ifdef MONO_ARCH_MONITOR_LOCK_TAKEN_REG
969 char *lock_taken = (char*)regs [MONO_ARCH_MONITOR_LOCK_TAKEN_REG];
970 mono_monitor_enter_v4 (obj, lock_taken);
972 g_assert_not_reached ();
977 mono_monitor_exit_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp)
979 mono_monitor_exit (obj);
982 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
985 * Precompute data to speed up mono_delegate_trampoline ().
986 * METHOD might be NULL.
988 static MonoDelegateTrampInfo*
989 create_delegate_trampoline_data (MonoDomain *domain, MonoClass *klass, MonoMethod *method)
991 MonoDelegateTrampInfo *tramp_data;
995 // Precompute the delegate invoke impl and pass it to the delegate trampoline
996 invoke = mono_get_delegate_invoke (klass);
999 tramp_data = mono_domain_alloc0 (domain, sizeof (MonoDelegateTrampInfo));
1000 tramp_data->invoke = invoke;
1001 tramp_data->invoke_sig = mono_method_signature (invoke);
1002 tramp_data->impl_this = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), TRUE);
1003 tramp_data->impl_nothis = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), FALSE);
1004 tramp_data->method = method;
1006 mono_error_init (&err);
1007 tramp_data->sig = mono_method_signature_checked (method, &err);
1008 tramp_data->need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (method, FALSE);
1015 * mono_delegate_trampoline:
1017 * This trampoline handles calls made to Delegate:Invoke ().
1018 * This is called once the first time a delegate is invoked, so it must be fast.
1021 mono_delegate_trampoline (mgreg_t *regs, guint8 *code, gpointer *arg, guint8* tramp)
1023 MonoDomain *domain = mono_domain_get ();
1024 MonoDelegate *delegate;
1027 MonoMethod *method = NULL;
1028 gboolean multicast, callvirt = FALSE, closed_over_null = FALSE;
1029 gboolean need_rgctx_tramp = FALSE;
1030 gboolean need_unbox_tramp = FALSE;
1031 gboolean enable_caching = TRUE;
1032 MonoDelegateTrampInfo *tramp_info = (MonoDelegateTrampInfo*)arg;
1033 MonoMethod *invoke = tramp_info->invoke;
1034 guint8 *impl_this = tramp_info->impl_this;
1035 guint8 *impl_nothis = tramp_info->impl_nothis;
1037 MonoMethodSignature *sig;
1038 gpointer addr, compiled_method;
1039 gboolean is_remote = FALSE;
1041 trampoline_calls ++;
1043 /* Obtain the delegate object according to the calling convention */
1044 delegate = mono_arch_get_this_arg_from_call (regs, code);
1046 if (delegate->method) {
1047 method = delegate->method;
1050 * delegate->method_ptr == NULL means the delegate was initialized by
1051 * mini_delegate_ctor, while != NULL means it is initialized by
1052 * mono_delegate_ctor_with_method (). In both cases, we need to add wrappers
1053 * (ctor_with_method () does this, but it doesn't store the wrapper back into
1054 * delegate->method).
1056 #ifndef DISABLE_REMOTING
1057 if (delegate->target && delegate->target->vtable->klass == mono_defaults.transparent_proxy_class) {
1060 if (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class != mono_class_get_com_object_class () &&
1061 !mono_class_is_com_object (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class))
1063 method = mono_marshal_get_remoting_invoke (method);
1067 sig = tramp_info->sig;
1068 if (!(sig && method == tramp_info->method)) {
1069 mono_error_init (&err);
1070 sig = mono_method_signature_checked (method, &err);
1072 mono_error_raise_exception (&err);
1075 if (sig->hasthis && method->klass->valuetype) {
1077 need_unbox_tramp = TRUE;
1079 method = mono_marshal_get_unbox_wrapper (method);
1083 ji = mono_jit_info_table_find (domain, mono_get_addr_from_ftnptr (delegate->method_ptr));
1085 method = jinfo_get_method (ji);
1089 sig = tramp_info->sig;
1090 if (!(sig && method == tramp_info->method)) {
1091 mono_error_init (&err);
1092 sig = mono_method_signature_checked (method, &err);
1094 mono_error_raise_exception (&err);
1097 callvirt = !delegate->target && sig->hasthis;
1099 closed_over_null = tramp_info->invoke_sig->param_count == sig->param_count;
1101 if (callvirt && !closed_over_null) {
1103 * The delegate needs to make a virtual call to the target method using its
1104 * first argument as the receiver. This is hard to support in full-aot, so
1105 * optimize it in some cases if possible.
1106 * If the target method is not virtual or is in a sealed class,
1107 * the vcall will call it directly.
1108 * If the call doesn't return a valuetype, then the vcall uses the same calling
1109 * convention as a normal call.
1111 if (((method->klass->flags & TYPE_ATTRIBUTE_SEALED) || !(method->flags & METHOD_ATTRIBUTE_VIRTUAL)) && !MONO_TYPE_ISSTRUCT (sig->ret)) {
1113 enable_caching = FALSE;
1117 if (delegate->target &&
1118 method->flags & METHOD_ATTRIBUTE_VIRTUAL &&
1119 method->flags & METHOD_ATTRIBUTE_ABSTRACT &&
1120 method->klass->flags & TYPE_ATTRIBUTE_ABSTRACT) {
1121 method = mono_object_get_virtual_method (delegate->target, method);
1122 enable_caching = FALSE;
1125 if (method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
1126 method = mono_marshal_get_synchronized_wrapper (method);
1128 if (method == tramp_info->method)
1129 need_rgctx_tramp = tramp_info->need_rgctx_tramp;
1130 else if (mono_method_needs_static_rgctx_invoke (method, FALSE))
1131 need_rgctx_tramp = TRUE;
1135 * If the called address is a trampoline, replace it with the compiled method so
1136 * further calls don't have to go through the trampoline.
1138 if (method && !callvirt) {
1139 /* Avoid the overhead of looking up an already compiled method if possible */
1140 if (enable_caching && delegate->method_code && *delegate->method_code) {
1141 delegate->method_ptr = *delegate->method_code;
1143 compiled_method = addr = mono_compile_method (method);
1144 addr = mini_add_method_trampoline (NULL, method, compiled_method, need_rgctx_tramp, need_unbox_tramp);
1145 delegate->method_ptr = addr;
1146 if (enable_caching && delegate->method_code)
1147 *delegate->method_code = delegate->method_ptr;
1150 if (need_rgctx_tramp)
1151 delegate->method_ptr = mono_create_static_rgctx_trampoline (method, delegate->method_ptr);
1154 /* Necessary for !code condition to fallback to slow path */
1157 multicast = ((MonoMulticastDelegate*)delegate)->prev != NULL;
1158 if (!multicast && !callvirt) {
1159 if (method && (method->flags & METHOD_ATTRIBUTE_STATIC) && mono_method_signature (method)->param_count == mono_method_signature (invoke)->param_count + 1)
1160 /* Closed static delegate */
1163 code = delegate->target ? impl_this : impl_nothis;
1167 /* The general, unoptimized case */
1168 m = mono_marshal_get_delegate_invoke (invoke, delegate);
1169 code = mono_compile_method (m);
1170 code = mini_add_method_trampoline (NULL, m, code, mono_method_needs_static_rgctx_invoke (m, FALSE), FALSE);
1173 delegate->invoke_impl = mono_get_addr_from_ftnptr (code);
1174 if (enable_caching && !callvirt && tramp_info->method) {
1175 tramp_info->method_ptr = delegate->method_ptr;
1176 tramp_info->invoke_impl = delegate->invoke_impl;
1184 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1186 mono_handler_block_guard_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_info, guint8* tramp)
1190 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
1191 gpointer resume_ip = jit_tls->handler_block_return_address;
1193 memcpy (&ctx, &jit_tls->handler_block_context, sizeof (MonoContext));
1194 MONO_CONTEXT_SET_IP (&ctx, jit_tls->handler_block_return_address);
1196 jit_tls->handler_block_return_address = NULL;
1197 jit_tls->handler_block = NULL;
1199 if (!resume_ip) /*this should not happen, but we should avoid crashing */
1200 exc = mono_get_exception_execution_engine ("Invalid internal state, resuming abort after handler block but no resume ip found");
1202 exc = mono_thread_resume_interruption ();
1205 mono_handle_exception (&ctx, exc);
1206 mono_restore_context (&ctx);
1213 mono_create_handler_block_trampoline (void)
1215 static gpointer code;
1217 mono_memory_barrier ();
1221 g_assert (!mono_aot_only);
1223 mono_trampolines_lock ();
1226 MonoTrampInfo *info;
1229 tmp = mono_arch_create_handler_block_trampoline (&info, FALSE);
1230 mono_tramp_info_register (info);
1231 mono_memory_barrier ();
1234 mono_trampolines_unlock ();
1241 * mono_get_trampoline_func:
1243 * Return the C function which needs to be called by the generic trampoline of type
1247 mono_get_trampoline_func (MonoTrampolineType tramp_type)
1249 switch (tramp_type) {
1250 case MONO_TRAMPOLINE_JIT:
1251 case MONO_TRAMPOLINE_JUMP:
1252 return mono_magic_trampoline;
1253 case MONO_TRAMPOLINE_CLASS_INIT:
1254 return mono_class_init_trampoline;
1255 case MONO_TRAMPOLINE_GENERIC_CLASS_INIT:
1256 return mono_generic_class_init_trampoline;
1257 case MONO_TRAMPOLINE_RGCTX_LAZY_FETCH:
1258 return mono_rgctx_lazy_fetch_trampoline;
1259 #ifdef MONO_ARCH_AOT_SUPPORTED
1260 case MONO_TRAMPOLINE_AOT:
1261 return mono_aot_trampoline;
1262 case MONO_TRAMPOLINE_AOT_PLT:
1263 return mono_aot_plt_trampoline;
1265 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1266 case MONO_TRAMPOLINE_DELEGATE:
1267 return mono_delegate_trampoline;
1269 case MONO_TRAMPOLINE_RESTORE_STACK_PROT:
1270 return mono_altstack_restore_prot;
1271 #ifndef DISABLE_REMOTING
1272 case MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING:
1273 return mono_generic_virtual_remoting_trampoline;
1275 case MONO_TRAMPOLINE_MONITOR_ENTER:
1276 return mono_monitor_enter_trampoline;
1277 case MONO_TRAMPOLINE_MONITOR_ENTER_V4:
1278 return mono_monitor_enter_v4_trampoline;
1279 case MONO_TRAMPOLINE_MONITOR_EXIT:
1280 return mono_monitor_exit_trampoline;
1281 case MONO_TRAMPOLINE_VCALL:
1282 return mono_vcall_trampoline;
1283 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1284 case MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD:
1285 return mono_handler_block_guard_trampoline;
1288 g_assert_not_reached ();
1294 create_trampoline_code (MonoTrampolineType tramp_type)
1296 MonoTrampInfo *info;
1299 code = mono_arch_create_generic_trampoline (tramp_type, &info, FALSE);
1300 mono_tramp_info_register (info);
1306 mono_trampolines_init (void)
1308 mono_mutex_init_recursive (&trampolines_mutex);
1313 mono_trampoline_code [MONO_TRAMPOLINE_JIT] = create_trampoline_code (MONO_TRAMPOLINE_JIT);
1314 mono_trampoline_code [MONO_TRAMPOLINE_JUMP] = create_trampoline_code (MONO_TRAMPOLINE_JUMP);
1315 mono_trampoline_code [MONO_TRAMPOLINE_CLASS_INIT] = create_trampoline_code (MONO_TRAMPOLINE_CLASS_INIT);
1316 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_CLASS_INIT] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_CLASS_INIT);
1317 mono_trampoline_code [MONO_TRAMPOLINE_RGCTX_LAZY_FETCH] = create_trampoline_code (MONO_TRAMPOLINE_RGCTX_LAZY_FETCH);
1318 #ifdef MONO_ARCH_AOT_SUPPORTED
1319 mono_trampoline_code [MONO_TRAMPOLINE_AOT] = create_trampoline_code (MONO_TRAMPOLINE_AOT);
1320 mono_trampoline_code [MONO_TRAMPOLINE_AOT_PLT] = create_trampoline_code (MONO_TRAMPOLINE_AOT_PLT);
1322 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1323 mono_trampoline_code [MONO_TRAMPOLINE_DELEGATE] = create_trampoline_code (MONO_TRAMPOLINE_DELEGATE);
1325 mono_trampoline_code [MONO_TRAMPOLINE_RESTORE_STACK_PROT] = create_trampoline_code (MONO_TRAMPOLINE_RESTORE_STACK_PROT);
1326 #ifndef DISABLE_REMOTING
1327 mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING);
1329 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_ENTER] = create_trampoline_code (MONO_TRAMPOLINE_MONITOR_ENTER);
1330 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_ENTER_V4] = create_trampoline_code (MONO_TRAMPOLINE_MONITOR_ENTER_V4);
1331 mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_EXIT] = create_trampoline_code (MONO_TRAMPOLINE_MONITOR_EXIT);
1332 mono_trampoline_code [MONO_TRAMPOLINE_VCALL] = create_trampoline_code (MONO_TRAMPOLINE_VCALL);
1333 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
1334 mono_trampoline_code [MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD] = create_trampoline_code (MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD);
1335 mono_create_handler_block_trampoline ();
1338 mono_counters_register ("Calls to trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &trampoline_calls);
1339 mono_counters_register ("JIT trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &jit_trampolines);
1340 mono_counters_register ("Unbox trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &unbox_trampolines);
1341 mono_counters_register ("Static rgctx trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &static_rgctx_trampolines);
1345 mono_trampolines_cleanup (void)
1347 if (class_init_hash_addr)
1348 g_hash_table_destroy (class_init_hash_addr);
1349 if (rgctx_lazy_fetch_trampoline_hash)
1350 g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash);
1351 if (rgctx_lazy_fetch_trampoline_hash_addr)
1352 g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash_addr);
1354 mono_mutex_destroy (&trampolines_mutex);
1358 mono_get_trampoline_code (MonoTrampolineType tramp_type)
1360 g_assert (mono_trampoline_code [tramp_type]);
1362 return mono_trampoline_code [tramp_type];
1366 mono_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
1369 return mono_aot_create_specific_trampoline (mono_defaults.corlib, arg1, tramp_type, domain, code_len);
1371 return mono_arch_create_specific_trampoline (arg1, tramp_type, domain, code_len);
1375 mono_create_class_init_trampoline (MonoVTable *vtable)
1378 MonoDomain *domain = vtable->domain;
1380 g_assert (!vtable->klass->generic_container);
1382 /* previously created trampoline code */
1383 mono_domain_lock (domain);
1385 g_hash_table_lookup (domain_jit_info (domain)->class_init_trampoline_hash,
1387 mono_domain_unlock (domain);
1391 code = mono_create_specific_trampoline (vtable, MONO_TRAMPOLINE_CLASS_INIT, domain, NULL);
1393 ptr = mono_create_ftnptr (domain, code);
1395 /* store trampoline address */
1396 mono_domain_lock (domain);
1397 g_hash_table_insert (domain_jit_info (domain)->class_init_trampoline_hash,
1399 mono_domain_unlock (domain);
1401 mono_trampolines_lock ();
1402 if (!class_init_hash_addr)
1403 class_init_hash_addr = g_hash_table_new (NULL, NULL);
1404 g_hash_table_insert (class_init_hash_addr, ptr, vtable);
1405 mono_trampolines_unlock ();
1411 mono_create_generic_class_init_trampoline (void)
1413 #ifdef MONO_ARCH_VTABLE_REG
1414 static gpointer code;
1415 MonoTrampInfo *info;
1417 mono_trampolines_lock ();
1421 /* get_named_code () might return an ftnptr, but our caller expects a direct pointer */
1422 code = mono_get_addr_from_ftnptr (mono_aot_get_trampoline ("generic_class_init_trampoline"));
1424 code = mono_arch_create_generic_class_init_trampoline (&info, FALSE);
1425 mono_tramp_info_register (info);
1429 mono_trampolines_unlock ();
1433 g_assert_not_reached ();
1438 mono_create_jump_trampoline (MonoDomain *domain, MonoMethod *method, gboolean add_sync_wrapper)
1442 guint32 code_size = 0;
1444 code = mono_jit_find_compiled_method_with_jit_info (domain, method, &ji);
1446 * We cannot recover the correct type of a shared generic
1447 * method from its native code address, so we use the
1448 * trampoline instead.
1449 * For synchronized methods, the trampoline adds the wrapper.
1451 if (code && !ji->has_generic_jit_info && !(method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED))
1454 mono_domain_lock (domain);
1455 code = g_hash_table_lookup (domain_jit_info (domain)->jump_trampoline_hash, method);
1456 mono_domain_unlock (domain);
1460 code = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JUMP, mono_domain_get (), &code_size);
1461 g_assert (code_size);
1463 ji = mono_domain_alloc0 (domain, MONO_SIZEOF_JIT_INFO);
1464 ji->code_start = code;
1465 ji->code_size = code_size;
1466 ji->d.method = method;
1469 * mono_delegate_ctor needs to find the method metadata from the
1470 * trampoline address, so we save it here.
1473 mono_jit_info_table_add (domain, ji);
1475 mono_domain_lock (domain);
1476 g_hash_table_insert (domain_jit_info (domain)->jump_trampoline_hash, method, ji->code_start);
1477 mono_domain_unlock (domain);
1479 return ji->code_start;
1483 mono_create_jit_trampoline_in_domain (MonoDomain *domain, MonoMethod *method)
1487 if (mono_aot_only) {
1488 /* Avoid creating trampolines if possible */
1489 gpointer code = mono_jit_find_compiled_method (domain, method);
1495 mono_domain_lock (domain);
1496 tramp = g_hash_table_lookup (domain_jit_info (domain)->jit_trampoline_hash, method);
1497 mono_domain_unlock (domain);
1501 tramp = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JIT, domain, NULL);
1503 mono_domain_lock (domain);
1504 g_hash_table_insert (domain_jit_info (domain)->jit_trampoline_hash, method, tramp);
1505 mono_domain_unlock (domain);
1513 mono_create_jit_trampoline (MonoMethod *method)
1515 return mono_create_jit_trampoline_in_domain (mono_domain_get (), method);
1519 mono_create_jit_trampoline_from_token (MonoImage *image, guint32 token)
1523 MonoDomain *domain = mono_domain_get ();
1524 guint8 *buf, *start;
1526 buf = start = mono_domain_alloc0 (domain, 2 * sizeof (gpointer));
1528 *(gpointer*)(gpointer)buf = image;
1529 buf += sizeof (gpointer);
1530 *(guint32*)(gpointer)buf = token;
1532 tramp = mono_create_specific_trampoline (start, MONO_TRAMPOLINE_AOT, domain, NULL);
1541 * mono_create_delegate_trampoline_info:
1543 * Create a delegate trampoline for the KLASS+METHOD pair.
1545 MonoDelegateTrampInfo*
1546 mono_create_delegate_trampoline_info (MonoDomain *domain, MonoClass *klass, MonoMethod *method)
1548 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1549 MonoDelegateTrampInfo *tramp_info;
1550 MonoClassMethodPair pair, *dpair;
1551 guint32 code_size = 0;
1554 pair.method = method;
1555 mono_domain_lock (domain);
1556 tramp_info = g_hash_table_lookup (domain_jit_info (domain)->delegate_trampoline_hash, &pair);
1557 mono_domain_unlock (domain);
1561 tramp_info = create_delegate_trampoline_data (domain, klass, method);
1563 tramp_info->invoke_impl = mono_create_specific_trampoline (tramp_info, MONO_TRAMPOLINE_DELEGATE, domain, &code_size);
1564 g_assert (code_size);
1566 dpair = mono_domain_alloc0 (domain, sizeof (MonoClassMethodPair));
1567 memcpy (dpair, &pair, sizeof (MonoClassMethodPair));
1569 /* store trampoline address */
1570 mono_domain_lock (domain);
1571 g_hash_table_insert (domain_jit_info (domain)->delegate_trampoline_hash, dpair, tramp_info);
1572 mono_domain_unlock (domain);
1581 mono_create_delegate_trampoline (MonoDomain *domain, MonoClass *klass)
1583 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1584 return mono_create_delegate_trampoline_info (domain, klass, NULL)->invoke_impl;
1591 mono_create_delegate_virtual_trampoline (MonoDomain *domain, MonoClass *klass, MonoMethod *method)
1593 #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
1594 MonoMethod *invoke = mono_get_delegate_invoke (klass);
1597 return mono_get_delegate_virtual_invoke_impl (mono_method_signature (invoke), method);
1604 mono_create_rgctx_lazy_fetch_trampoline (guint32 offset)
1606 static gboolean inited = FALSE;
1607 static int num_trampolines = 0;
1608 MonoTrampInfo *info;
1610 gpointer tramp, ptr;
1612 mono_trampolines_lock ();
1613 if (rgctx_lazy_fetch_trampoline_hash)
1614 tramp = g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset));
1617 mono_trampolines_unlock ();
1621 if (mono_aot_only) {
1622 ptr = mono_aot_get_lazy_fetch_trampoline (offset);
1624 tramp = mono_arch_create_rgctx_lazy_fetch_trampoline (offset, &info, FALSE);
1625 mono_tramp_info_register (info);
1626 ptr = mono_create_ftnptr (mono_get_root_domain (), tramp);
1629 mono_trampolines_lock ();
1630 if (!rgctx_lazy_fetch_trampoline_hash) {
1631 rgctx_lazy_fetch_trampoline_hash = g_hash_table_new (NULL, NULL);
1632 rgctx_lazy_fetch_trampoline_hash_addr = g_hash_table_new (NULL, NULL);
1634 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset), ptr);
1635 g_assert (offset != -1);
1636 g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash_addr, ptr, GUINT_TO_POINTER (offset + 1));
1637 mono_trampolines_unlock ();
1640 mono_counters_register ("RGCTX num lazy fetch trampolines",
1641 MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_trampolines);
1650 mono_create_monitor_enter_trampoline (void)
1652 static gpointer code;
1654 if (mono_aot_only) {
1656 code = mono_aot_get_trampoline ("monitor_enter_trampoline");
1660 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
1661 mono_trampolines_lock ();
1664 MonoTrampInfo *info;
1666 code = mono_arch_create_monitor_enter_trampoline (&info, FALSE, FALSE);
1667 mono_tramp_info_register (info);
1670 mono_trampolines_unlock ();
1673 g_assert_not_reached ();
1680 mono_create_monitor_enter_v4_trampoline (void)
1682 static gpointer code;
1684 if (mono_aot_only) {
1686 code = mono_aot_get_trampoline ("monitor_enter_v4_trampoline");
1690 #if defined(MONO_ARCH_MONITOR_OBJECT_REG) && defined(MONO_ARCH_MONITOR_LOCK_TAKEN_REG)
1691 mono_trampolines_lock ();
1694 MonoTrampInfo *info;
1696 code = mono_arch_create_monitor_enter_trampoline (&info, TRUE, FALSE);
1697 mono_tramp_info_register (info);
1700 mono_trampolines_unlock ();
1703 g_assert_not_reached ();
1710 mono_create_monitor_exit_trampoline (void)
1712 static gpointer code;
1714 if (mono_aot_only) {
1716 code = mono_aot_get_trampoline ("monitor_exit_trampoline");
1720 #ifdef MONO_ARCH_MONITOR_OBJECT_REG
1721 mono_trampolines_lock ();
1724 MonoTrampInfo *info;
1726 code = mono_arch_create_monitor_exit_trampoline (&info, FALSE);
1727 mono_tramp_info_register (info);
1730 mono_trampolines_unlock ();
1733 g_assert_not_reached ();
1738 #ifdef MONO_ARCH_LLVM_SUPPORTED
1740 * mono_create_llvm_imt_trampoline:
1742 * LLVM compiled code can't pass in the IMT argument, so we use this trampoline, which
1743 * sets the IMT argument, then branches to the contents of the vtable slot given by
1744 * vt_offset in the vtable which is obtained from the argument list.
1747 mono_create_llvm_imt_trampoline (MonoDomain *domain, MonoMethod *m, int vt_offset)
1749 #ifdef MONO_ARCH_HAVE_LLVM_IMT_TRAMPOLINE
1750 return mono_arch_get_llvm_imt_trampoline (domain, m, vt_offset);
1752 g_assert_not_reached ();
1759 mono_find_class_init_trampoline_by_addr (gconstpointer addr)
1763 mono_trampolines_lock ();
1764 if (class_init_hash_addr)
1765 res = g_hash_table_lookup (class_init_hash_addr, addr);
1768 mono_trampolines_unlock ();
1773 mono_find_rgctx_lazy_fetch_trampoline_by_addr (gconstpointer addr)
1777 mono_trampolines_lock ();
1778 if (rgctx_lazy_fetch_trampoline_hash_addr) {
1779 /* We store the real offset + 1 so we can detect when the lookup fails */
1780 offset = GPOINTER_TO_INT (g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash_addr, addr));
1788 mono_trampolines_unlock ();
1792 static const char*tramp_names [MONO_TRAMPOLINE_NUM] = {
1796 "generic_class_init",
1801 "restore_stack_prot",
1802 "generic_virtual_remoting",
1807 "handler_block_guard"
1811 * mono_get_generic_trampoline_simple_name:
1815 mono_get_generic_trampoline_simple_name (MonoTrampolineType tramp_type)
1817 return tramp_names [tramp_type];
1821 * mono_get_generic_trampoline_name:
1823 * Returns a pointer to malloc-ed memory.
1826 mono_get_generic_trampoline_name (MonoTrampolineType tramp_type)
1828 return g_strdup_printf ("generic_trampoline_%s", tramp_names [tramp_type]);
1832 * mono_get_rgctx_fetch_trampoline_name:
1834 * Returns a pointer to malloc-ed memory.
1837 mono_get_rgctx_fetch_trampoline_name (int slot)
1842 mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
1843 index = MONO_RGCTX_SLOT_INDEX (slot);
1845 return g_strdup_printf ("rgctx_fetch_trampoline_%s_%d", mrgctx ? "mrgctx" : "rgctx", index);
1849 mini_get_nullified_class_init_trampoline (void)
1851 static gpointer nullified_class_init_trampoline;
1853 if (!nullified_class_init_trampoline) {
1855 MonoTrampInfo *info;
1857 if (mono_aot_only) {
1858 tramp = mono_aot_get_trampoline ("nullified_class_init_trampoline");
1860 tramp = mono_arch_get_nullified_class_init_trampoline (&info);
1861 mono_tramp_info_register (info);
1863 mono_memory_barrier ();
1864 nullified_class_init_trampoline = tramp;
1867 return nullified_class_init_trampoline;
1871 * mini_get_single_step_trampoline:
1873 * Return a trampoline which calls debugger_agent_single_step_from_context ().
1876 mini_get_single_step_trampoline (void)
1878 static gpointer trampoline;
1882 MonoTrampInfo *info;
1884 if (mono_aot_only) {
1885 tramp = mono_aot_get_trampoline ("sdb_single_step_trampoline");
1887 #ifdef MONO_ARCH_HAVE_SDB_TRAMPOLINES
1888 tramp = mono_arch_create_sdb_trampoline (TRUE, &info, FALSE);
1889 mono_tramp_info_register (info);
1892 g_assert_not_reached ();
1895 mono_memory_barrier ();
1903 * mini_get_breakpoint_trampoline:
1905 * Return a trampoline which calls debugger_agent_breakpoint_from_context ().
1908 mini_get_breakpoint_trampoline (void)
1910 static gpointer trampoline;
1914 MonoTrampInfo *info;
1916 if (mono_aot_only) {
1917 tramp = mono_aot_get_trampoline ("sdb_breakpoint_trampoline");
1919 #ifdef MONO_ARCH_HAVE_SDB_TRAMPOLINES
1920 tramp = mono_arch_create_sdb_trampoline (FALSE, &info, FALSE);
1921 mono_tramp_info_register (info);
1924 g_assert_not_reached ();
1927 mono_memory_barrier ();