/* * (C) 2003 Ximian, Inc. * (C) 2003-2011 Novell, Inc. * Copyright 2011 Xamarin, Inc (http://www.xamarin.com) */ #include #include #include #include #include #include #include #include #include #include "mini.h" /* * Address of the trampoline code. This is used by the debugger to check * whether a method is a trampoline. */ guint8* mono_trampoline_code [MONO_TRAMPOLINE_NUM]; static GHashTable *class_init_hash_addr = NULL; static GHashTable *rgctx_lazy_fetch_trampoline_hash = NULL; static GHashTable *rgctx_lazy_fetch_trampoline_hash_addr = NULL; static guint32 trampoline_calls, jit_trampolines, unbox_trampolines, static_rgctx_trampolines; #define mono_trampolines_lock() EnterCriticalSection (&trampolines_mutex) #define mono_trampolines_unlock() LeaveCriticalSection (&trampolines_mutex) static CRITICAL_SECTION trampolines_mutex; #ifdef MONO_ARCH_GSHARED_SUPPORTED typedef struct { MonoMethod *m; gpointer addr; } RgctxTrampInfo; static gint rgctx_tramp_info_equal (gconstpointer ka, gconstpointer kb) { const RgctxTrampInfo *i1 = ka; const RgctxTrampInfo *i2 = kb; if (i1->m == i2->m && i1->addr == i2->addr) return 1; else return 0; } static guint rgctx_tramp_info_hash (gconstpointer data) { const RgctxTrampInfo *info = data; return GPOINTER_TO_UINT (info->m) ^ GPOINTER_TO_UINT (info->addr); } /* * mono_create_static_rgctx_trampoline: * * Return a static rgctx trampoline for M which branches to ADDR which should * point to the compiled code of M. * * Static rgctx trampolines are used when a shared generic method which doesn't * have a this argument is called indirectly, ie. from code which can't pass in * the rgctx argument. The trampoline sets the rgctx argument and jumps to the * methods code. These trampolines are similar to the unbox trampolines, they * perform the same task as the static rgctx wrappers, but they are smaller/faster, * and can be made to work with full AOT. * On PPC addr should be an ftnptr and the return value is an ftnptr too. */ gpointer mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr) { gpointer ctx; gpointer res; MonoDomain *domain; RgctxTrampInfo tmp_info; RgctxTrampInfo *info; #ifdef PPC_USES_FUNCTION_DESCRIPTOR g_assert (((gpointer*)addr) [2] == 0); #endif ctx = mini_method_get_rgctx (m); domain = mono_domain_get (); /* * In the AOT case, addr might point to either the method, or to an unbox trampoline, * so make the hash keyed on the m+addr pair. */ mono_domain_lock (domain); if (!domain_jit_info (domain)->static_rgctx_trampoline_hash) domain_jit_info (domain)->static_rgctx_trampoline_hash = g_hash_table_new (rgctx_tramp_info_hash, rgctx_tramp_info_equal); tmp_info.m = m; tmp_info.addr = addr; res = g_hash_table_lookup (domain_jit_info (domain)->static_rgctx_trampoline_hash, &tmp_info); mono_domain_unlock (domain); if (res) return res; if (mono_aot_only) res = mono_aot_get_static_rgctx_trampoline (ctx, addr); else res = mono_arch_get_static_rgctx_trampoline (m, ctx, addr); mono_domain_lock (domain); /* Duplicates inserted while we didn't hold the lock are OK */ info = mono_domain_alloc (domain, sizeof (RgctxTrampInfo)); info->m = m; info->addr = addr; g_hash_table_insert (domain_jit_info (domain)->static_rgctx_trampoline_hash, info, res); mono_domain_unlock (domain); static_rgctx_trampolines ++; return res; } #else gpointer mono_create_static_rgctx_trampoline (MonoMethod *m, gpointer addr) { /* * This shouldn't happen as all arches which support generic sharing support * static rgctx trampolines as well. */ g_assert_not_reached (); } #endif #ifdef MONO_ARCH_HAVE_IMT /* * Either IMPL_METHOD or AOT_ADDR will be set on return. */ static gpointer* #ifdef __GNUC__ /* * This works against problems when compiling with gcc 4.6 on arm. The 'then' part of * this line gets executed, even when the condition is false: * if (impl && mono_method_needs_static_rgctx_invoke (impl, FALSE)) * *need_rgctx_tramp = TRUE; */ __attribute__ ((noinline)) #endif 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) { MonoObject *this_argument = mono_arch_get_this_arg_from_call (regs, code); MonoVTable *vt = this_argument->vtable; int displacement = slot - ((gpointer*)vt); if (displacement > 0) { /* slot is in the vtable, not in the IMT */ #if DEBUG_IMT printf ("mono_convert_imt_slot_to_vtable_slot: slot %p is in the vtable, not in the IMT\n", slot); #endif return slot; } else { MonoMethod *imt_method = mono_arch_find_imt_method (regs, code); MonoMethod *impl; int interface_offset; int imt_slot = MONO_IMT_SIZE + displacement; /*This has to be variance aware since imt_method can be from an interface that vt->klass doesn't directly implement*/ interface_offset = mono_class_interface_offset_with_variance (vt->klass, imt_method->klass, variance_used); if (interface_offset < 0) { 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)); } mono_vtable_build_imt_slot (vt, mono_method_get_imt_slot (imt_method)); if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) { MonoGenericContext context = { NULL, NULL }; /* * Generic virtual method, imt_method contains the inflated interface * method, need to get the inflated impl method. */ /* imt_method->slot might not be set */ impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_declaring_generic_method (imt_method)->slot); if (impl->klass->generic_class) context.class_inst = impl->klass->generic_class->context.class_inst; context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst; impl = mono_class_inflate_generic_method (impl, &context); } else { /* Avoid loading metadata or creating a generic vtable if possible */ if (lookup_aot && !vt->klass->valuetype) *aot_addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, interface_offset + mono_method_get_vtable_slot (imt_method)); else *aot_addr = NULL; if (*aot_addr) impl = NULL; else impl = mono_class_get_vtable_entry (vt->klass, interface_offset + mono_method_get_vtable_slot (imt_method)); } if (impl && mono_method_needs_static_rgctx_invoke (impl, FALSE)) *need_rgctx_tramp = TRUE; if (impl && impl->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED) { WrapperInfo *info = mono_marshal_get_wrapper_info (impl); if (info && info->subtype == WRAPPER_SUBTYPE_GENERIC_ARRAY_HELPER) { // FIXME: This needs a gsharedvt-out trampoline, since the caller uses the gsharedvt calling conv, but the // wrapper is a normal non-generic method. *need_rgctx_tramp = TRUE; //g_assert_not_reached (); } } *impl_method = impl; #if DEBUG_IMT printf ("mono_convert_imt_slot_to_vtable_slot: method = %s.%s.%s, imt_method = %s.%s.%s\n", method->klass->name_space, method->klass->name, method->name, imt_method->klass->name_space, imt_method->klass->name, imt_method->name); #endif g_assert (imt_slot < MONO_IMT_SIZE); if (vt->imt_collisions_bitmap & (1 << imt_slot)) { int slot = mono_method_get_vtable_index (imt_method); int vtable_offset; gpointer *vtable_slot; g_assert (slot != -1); vtable_offset = interface_offset + slot; vtable_slot = & (vt->vtable [vtable_offset]); #if DEBUG_IMT 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); #endif return vtable_slot; } else { #if DEBUG_IMT printf ("mono_convert_imt_slot_to_vtable_slot: slot %p[%d] is in the IMT, but not colliding\n", slot, imt_slot); #endif return slot; } } } #endif /* * This is a super-ugly hack to fix bug #616463. * * The problem is that we don't always set is_generic for generic * method definitions. See the comment at the end of * mono_class_inflate_generic_method_full_checked() in class.c. */ static gboolean is_generic_method_definition (MonoMethod *m) { MonoGenericContext *context; if (m->is_generic) return TRUE; if (!m->is_inflated) return FALSE; context = mono_method_get_context (m); if (!context->method_inst) return FALSE; if (context->method_inst == mono_method_get_generic_container (((MonoMethodInflated*)m)->declaring)->context.method_inst) return TRUE; return FALSE; } gboolean mini_jit_info_is_gsharedvt (MonoJitInfo *ji) { if (ji && ji->has_generic_jit_info && (mono_jit_info_get_generic_sharing_context (ji)->var_is_vt || mono_jit_info_get_generic_sharing_context (ji)->mvar_is_vt)) return TRUE; else return FALSE; } /* * mini_add_method_trampoline: * * Add static rgctx/gsharedvt_in/unbox trampolines to M/COMPILED_METHOD if needed. Return the trampoline address, or * COMPILED_METHOD if no trampoline is needed. * ORIG_METHOD is the method the caller originally called i.e. an iface method, or NULL. */ gpointer mini_add_method_trampoline (MonoMethod *orig_method, MonoMethod *m, gpointer compiled_method, gboolean add_static_rgctx_tramp, gboolean add_unbox_tramp) { gpointer addr = compiled_method; gboolean callee_gsharedvt, callee_array_helper; MonoMethod *jmethod = NULL; MonoJitInfo *ji = mini_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method), NULL); // FIXME: This loads information from AOT callee_gsharedvt = mini_jit_info_is_gsharedvt (ji); callee_array_helper = FALSE; if (m->wrapper_type == MONO_WRAPPER_MANAGED_TO_MANAGED) { WrapperInfo *info = mono_marshal_get_wrapper_info (m); /* * generic array helpers. * Have to replace the wrappers with the original generic instances. */ if (info && info->subtype == WRAPPER_SUBTYPE_GENERIC_ARRAY_HELPER) { callee_array_helper = TRUE; m = info->d.generic_array_helper.method; } } else if (m->wrapper_type == MONO_WRAPPER_UNKNOWN) { WrapperInfo *info = mono_marshal_get_wrapper_info (m); /* Same for synchronized inner wrappers */ if (info && info->subtype == WRAPPER_SUBTYPE_SYNCHRONIZED_INNER) { m = info->d.synchronized_inner.method; } } if (!orig_method) orig_method = m; if (callee_gsharedvt) g_assert (m->is_inflated); addr = compiled_method; if (add_unbox_tramp) { /* * The unbox trampolines call the method directly, so need to add * an rgctx tramp before them. */ if (mono_aot_only) { addr = mono_aot_get_unbox_trampoline (m); } else { unbox_trampolines ++; addr = mono_arch_get_unbox_trampoline (m, addr); } } if (ji) jmethod = jinfo_get_method (ji); if (callee_gsharedvt && mini_is_gsharedvt_variable_signature (mono_method_signature (jmethod))) { MonoGenericSharingContext *gsctx; MonoMethodSignature *sig, *gsig; /* Here m is a generic instance, while ji->method is the gsharedvt method implementing it */ /* Call from normal/gshared code to gsharedvt code with variable signature */ gsctx = mono_jit_info_get_generic_sharing_context (ji); sig = mono_method_signature (m); gsig = mono_method_signature (jmethod); addr = mini_get_gsharedvt_wrapper (TRUE, addr, sig, gsig, gsctx, -1, FALSE); //printf ("IN: %s\n", mono_method_full_name (m, TRUE)); } if (add_static_rgctx_tramp && !callee_array_helper) addr = mono_create_static_rgctx_trampoline (m, addr); return addr; } /** * common_call_trampoline: * * The code to handle normal, virtual, and interface method calls and jumps, both * from JITted and LLVM compiled code. */ static gpointer common_call_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8* tramp, MonoVTable *vt, gpointer *vtable_slot, gboolean need_rgctx_tramp) { gpointer addr, compiled_method; gboolean generic_shared = FALSE; gboolean need_unbox_tramp = FALSE; MonoMethod *declaring = NULL; MonoMethod *generic_virtual = NULL, *variant_iface = NULL, *orig_method = NULL; int context_used; gboolean virtual, variance_used = FALSE; gpointer *orig_vtable_slot, *vtable_slot_to_patch = NULL; MonoJitInfo *ji = NULL; virtual = (gpointer)vtable_slot > (gpointer)vt; orig_vtable_slot = vtable_slot; vtable_slot_to_patch = vtable_slot; #ifdef MONO_ARCH_HAVE_IMT /* IMT call */ if (vt && (gpointer)vtable_slot < (gpointer)vt) { MonoMethod *impl_method = NULL; MonoObject *this_arg; /* we get the interface method because mono_convert_imt_slot_to_vtable_slot () * needs the signature to be able to find the this argument */ m = mono_arch_find_imt_method (regs, code); vtable_slot = orig_vtable_slot; g_assert (vtable_slot); orig_method = m; this_arg = mono_arch_get_this_arg_from_call (regs, code); if (mono_object_is_transparent_proxy (this_arg)) { /* Use the slow path for now */ m = mono_object_get_virtual_method (this_arg, m); vtable_slot_to_patch = NULL; } else { gboolean lookup_aot; if (m->is_inflated && ((MonoMethodInflated*)m)->context.method_inst) { /* Generic virtual method */ generic_virtual = m; need_rgctx_tramp = TRUE; } else if (variance_used && mono_class_has_variant_generic_params (m->klass)) { variant_iface = m; } addr = NULL; /* We can only use the AOT compiled code if we don't require further processing */ lookup_aot = !generic_virtual & !variant_iface; vtable_slot = mono_convert_imt_slot_to_vtable_slot (vtable_slot, regs, code, m, lookup_aot, &impl_method, &need_rgctx_tramp, &variance_used, &addr); /* This is the vcall slot which gets called through the IMT thunk */ vtable_slot_to_patch = vtable_slot; /* mono_convert_imt_slot_to_vtable_slot () also gives us the method that is supposed * to be called, so we compile it and go ahead as usual. */ /*g_print ("imt found method %p (%s) at %p\n", impl_method, impl_method->name, code);*/ if (addr) { /* * We found AOT compiled code for the method, skip the rest. */ if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot)) *vtable_slot = addr; return mono_create_ftnptr (mono_domain_get (), addr); } m = impl_method; } } #endif /* * The virtual check is needed because is_generic_method_definition (m) could * return TRUE for methods used in IMT calls too. */ if (virtual && is_generic_method_definition (m)) { MonoGenericContext context = { NULL, NULL }; MonoMethod *declaring; if (m->is_inflated) declaring = mono_method_get_declaring_generic_method (m); else declaring = m; if (m->klass->generic_class) context.class_inst = m->klass->generic_class->context.class_inst; else g_assert (!m->klass->generic_container); #ifdef MONO_ARCH_HAVE_IMT generic_virtual = mono_arch_find_imt_method (regs, code); #endif if (generic_virtual) { g_assert (generic_virtual->is_inflated); context.method_inst = ((MonoMethodInflated*)generic_virtual)->context.method_inst; } m = mono_class_inflate_generic_method (declaring, &context); /* FIXME: only do this if the method is sharable */ need_rgctx_tramp = TRUE; } else if ((context_used = mono_method_check_context_used (m))) { MonoClass *klass = NULL; MonoMethod *actual_method = NULL; MonoVTable *vt = NULL; MonoGenericInst *method_inst = NULL; vtable_slot = NULL; generic_shared = TRUE; g_assert (code); if (m->is_inflated && mono_method_get_context (m)->method_inst) { #ifdef MONO_ARCH_RGCTX_REG MonoMethodRuntimeGenericContext *mrgctx = (MonoMethodRuntimeGenericContext*)mono_arch_find_static_call_vtable (regs, code); klass = mrgctx->class_vtable->klass; method_inst = mrgctx->method_inst; #else g_assert_not_reached (); #endif } else if ((m->flags & METHOD_ATTRIBUTE_STATIC) || m->klass->valuetype) { #ifdef MONO_ARCH_RGCTX_REG MonoVTable *vtable = mono_arch_find_static_call_vtable (regs, code); klass = vtable->klass; #else g_assert_not_reached (); #endif } else { #ifdef MONO_ARCH_HAVE_IMT MonoObject *this_argument = mono_arch_get_this_arg_from_call (regs, code); vt = this_argument->vtable; vtable_slot = orig_vtable_slot; g_assert (this_argument->vtable->klass->inited); //mono_class_init (this_argument->vtable->klass); if (!vtable_slot) { mono_class_setup_supertypes (this_argument->vtable->klass); klass = this_argument->vtable->klass->supertypes [m->klass->idepth - 1]; } #else NOT_IMPLEMENTED; #endif } g_assert (vtable_slot || klass); if (vtable_slot) { int displacement = vtable_slot - ((gpointer*)vt); g_assert_not_reached (); g_assert (displacement > 0); actual_method = vt->klass->vtable [displacement]; } if (method_inst || m->wrapper_type) { MonoGenericContext context = { NULL, NULL }; if (m->is_inflated) declaring = mono_method_get_declaring_generic_method (m); else declaring = m; if (klass->generic_class) context.class_inst = klass->generic_class->context.class_inst; else if (klass->generic_container) context.class_inst = klass->generic_container->context.class_inst; context.method_inst = method_inst; actual_method = mono_class_inflate_generic_method (declaring, &context); } else { actual_method = mono_class_get_method_generic (klass, m); } g_assert (klass); g_assert (actual_method); g_assert (actual_method->klass == klass); if (actual_method->is_inflated) declaring = mono_method_get_declaring_generic_method (actual_method); else declaring = NULL; m = actual_method; } if (m->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) { m = mono_marshal_get_synchronized_wrapper (m); need_rgctx_tramp = FALSE; } /* Calls made through delegates on platforms without delegate trampolines */ if (!code && mono_method_needs_static_rgctx_invoke (m, FALSE)) need_rgctx_tramp = TRUE; addr = compiled_method = mono_compile_method (m); g_assert (addr); if (generic_virtual || variant_iface) { if (vt->klass->valuetype) /*FIXME is this required variant iface?*/ need_unbox_tramp = TRUE; } else if (orig_vtable_slot) { if (m->klass->valuetype) need_unbox_tramp = TRUE; } addr = mini_add_method_trampoline (orig_method, m, compiled_method, need_rgctx_tramp, need_unbox_tramp); if (generic_virtual || variant_iface) { MonoMethod *target = generic_virtual ? generic_virtual : variant_iface; vtable_slot = orig_vtable_slot; g_assert (vtable_slot); mono_method_add_generic_virtual_invocation (mono_domain_get (), vt, vtable_slot, target, addr); return addr; } /* the method was jumped to */ if (!code) { MonoDomain *domain = mono_domain_get (); /* Patch the got entries pointing to this method */ /* * We do this here instead of in mono_codegen () to cover the case when m * was loaded from an aot image. */ if (domain_jit_info (domain)->jump_target_got_slot_hash) { GSList *list, *tmp; mono_domain_lock (domain); list = g_hash_table_lookup (domain_jit_info (domain)->jump_target_got_slot_hash, m); if (list) { for (tmp = list; tmp; tmp = tmp->next) { gpointer *got_slot = tmp->data; *got_slot = addr; } g_hash_table_remove (domain_jit_info (domain)->jump_target_got_slot_hash, m); g_slist_free (list); } mono_domain_unlock (domain); } return addr; } vtable_slot = orig_vtable_slot; if (vtable_slot) { 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))) { g_assert (*vtable_slot_to_patch); *vtable_slot_to_patch = mono_get_addr_from_ftnptr (addr); } } else { guint8 *plt_entry = mono_aot_get_plt_entry (code); gboolean no_patch = FALSE; MonoJitInfo *target_ji; if (plt_entry) { if (generic_shared) { target_ji = mini_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method), NULL); if (!ji) ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL); if (ji && target_ji && generic_shared && ji->has_generic_jit_info && !target_ji->has_generic_jit_info) { no_patch = TRUE; } } if (!no_patch) mono_aot_patch_plt_entry (plt_entry, NULL, regs, addr); } else { if (generic_shared) { if (m->wrapper_type != MONO_WRAPPER_NONE) m = mono_marshal_method_from_wrapper (m); //g_assert (mono_method_is_generic_sharable (m, FALSE)); } /* Patch calling code */ target_ji = mini_jit_info_table_find (mono_domain_get (), mono_get_addr_from_ftnptr (compiled_method), NULL); if (!ji) ji = mini_jit_info_table_find (mono_domain_get (), (char*)code, NULL); if (ji && target_ji && generic_shared && ji->has_generic_jit_info && !target_ji->has_generic_jit_info) { /* * Can't patch the call as the caller is gshared, but the callee is not. Happens when * generic sharing fails. * FIXME: Performance problem. */ no_patch = TRUE; } if (!no_patch && mono_method_same_domain (ji, target_ji)) mono_arch_patch_callsite (ji->code_start, code, addr); } } return addr; } /** * mono_magic_trampoline: * * This trampoline handles normal calls from JITted code. */ gpointer mono_magic_trampoline (mgreg_t *regs, guint8 *code, gpointer arg, guint8* tramp) { trampoline_calls ++; return common_call_trampoline (regs, code, arg, tramp, NULL, NULL, FALSE); } /* * mono_vcall_trampoline: * * This trampoline handles virtual calls. */ static gpointer mono_vcall_trampoline (mgreg_t *regs, guint8 *code, int slot, guint8 *tramp) { MonoObject *this; MonoVTable *vt; gpointer *vtable_slot; MonoMethod *m; gboolean need_rgctx_tramp = FALSE; gpointer addr; trampoline_calls ++; /* * We need to obtain the following pieces of information: * - the method which needs to be compiled. * - the vtable slot. * We use one vtable trampoline per vtable slot index, so we need only the vtable, * the other two can be computed from the vtable + the slot index. */ #ifndef MONO_ARCH_THIS_AS_FIRST_ARG /* All architectures should support this */ g_assert_not_reached (); #endif /* * Obtain the vtable from the 'this' arg. */ this = mono_arch_get_this_arg_from_call (regs, code); g_assert (this); vt = this->vtable; if (slot >= 0) { /* Normal virtual call */ vtable_slot = &(vt->vtable [slot]); /* Avoid loading metadata or creating a generic vtable if possible */ addr = mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, slot); if (addr && !vt->klass->valuetype) { if (mono_domain_owns_vtable_slot (mono_domain_get (), vtable_slot)) *vtable_slot = addr; return mono_create_ftnptr (mono_domain_get (), addr); } /* * Bug #616463 (see * is_generic_method_definition() above) also * goes away if we do a * mono_class_setup_vtable (vt->klass) here, * because we then inflate the method * correctly, put it in the cache, and the * "wrong" inflation invocation still looks up * the correctly inflated method. * * The hack above seems more stable and * trustworthy. */ m = mono_class_get_vtable_entry (vt->klass, slot); need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (m, 0); } else { /* IMT call */ vtable_slot = &(((gpointer*)vt) [slot]); m = NULL; need_rgctx_tramp = FALSE; } return common_call_trampoline (regs, code, m, tramp, vt, vtable_slot, need_rgctx_tramp); } #ifndef DISABLE_REMOTING gpointer mono_generic_virtual_remoting_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8 *tramp) { MonoGenericContext context = { NULL, NULL }; MonoMethod *imt_method, *declaring; gpointer addr; trampoline_calls ++; g_assert (m->is_generic); if (m->is_inflated) declaring = mono_method_get_declaring_generic_method (m); else declaring = m; if (m->klass->generic_class) context.class_inst = m->klass->generic_class->context.class_inst; else g_assert (!m->klass->generic_container); #ifdef MONO_ARCH_HAVE_IMT imt_method = mono_arch_find_imt_method (regs, code); if (imt_method->is_inflated) context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst; #endif m = mono_class_inflate_generic_method (declaring, &context); m = mono_marshal_get_remoting_invoke_with_check (m); addr = mono_compile_method (m); g_assert (addr); return addr; } #endif /* * mono_aot_trampoline: * * This trampoline handles calls made from AOT code. We try to bypass the * normal JIT compilation logic to avoid loading the metadata for the method. */ #ifdef MONO_ARCH_AOT_SUPPORTED gpointer mono_aot_trampoline (mgreg_t *regs, guint8 *code, guint8 *token_info, guint8* tramp) { MonoImage *image; guint32 token; MonoMethod *method = NULL; gpointer addr; guint8 *plt_entry; trampoline_calls ++; image = *(gpointer*)(gpointer)token_info; token_info += sizeof (gpointer); token = *(guint32*)(gpointer)token_info; addr = mono_aot_get_method_from_token (mono_domain_get (), image, token); if (!addr) { method = mono_get_method (image, token, NULL); g_assert (method); /* Use the generic code */ return mono_magic_trampoline (regs, code, method, tramp); } addr = mono_create_ftnptr (mono_domain_get (), addr); /* This is a normal call through a PLT entry */ plt_entry = mono_aot_get_plt_entry (code); g_assert (plt_entry); mono_aot_patch_plt_entry (plt_entry, NULL, regs, addr); return addr; } /* * mono_aot_plt_trampoline: * * This trampoline handles calls made from AOT code through the PLT table. */ gpointer mono_aot_plt_trampoline (mgreg_t *regs, guint8 *code, guint8 *aot_module, guint8* tramp) { guint32 plt_info_offset = mono_aot_get_plt_info_offset (regs, code); gpointer res; trampoline_calls ++; res = mono_aot_plt_resolve (aot_module, plt_info_offset, code); if (!res) { if (mono_loader_get_last_error ()) mono_raise_exception (mono_loader_error_prepare_exception (mono_loader_get_last_error ())); // FIXME: Error handling (how ?) g_assert (res); } return res; } #endif /** * mono_class_init_trampoline: * * This method calls mono_runtime_class_init () to run the static constructor * for the type, then patches the caller code so it is not called again. */ void mono_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp) { guint8 *plt_entry = mono_aot_get_plt_entry (code); trampoline_calls ++; mono_runtime_class_init (vtable); if (vtable->initialized) { if (plt_entry) mono_arch_nullify_plt_entry (plt_entry, regs); else mono_arch_nullify_class_init_trampoline (code, regs); } } /** * mono_generic_class_init_trampoline: * * This method calls mono_runtime_class_init () to run the static constructor * for the type. */ void mono_generic_class_init_trampoline (mgreg_t *regs, guint8 *code, MonoVTable *vtable, guint8 *tramp) { trampoline_calls ++; mono_runtime_class_init (vtable); } static gpointer mono_rgctx_lazy_fetch_trampoline (mgreg_t *regs, guint8 *code, gpointer data, guint8 *tramp) { #ifdef MONO_ARCH_VTABLE_REG static gboolean inited = FALSE; static int num_lookups = 0; guint32 slot = GPOINTER_TO_UINT (data); mgreg_t *r = (mgreg_t*)regs; gpointer arg = (gpointer)(gssize)r [MONO_ARCH_VTABLE_REG]; guint32 index = MONO_RGCTX_SLOT_INDEX (slot); gboolean mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot); trampoline_calls ++; if (!inited) { mono_counters_register ("RGCTX unmanaged lookups", MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_lookups); inited = TRUE; } num_lookups++; if (mrgctx) return mono_method_fill_runtime_generic_context (arg, code, index); else return mono_class_fill_runtime_generic_context (arg, code, index); #else g_assert_not_reached (); #endif } void mono_monitor_enter_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp) { mono_monitor_enter (obj); } void mono_monitor_exit_trampoline (mgreg_t *regs, guint8 *code, MonoObject *obj, guint8 *tramp) { mono_monitor_exit (obj); } #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE /** * mono_delegate_trampoline: * * This trampoline handles calls made to Delegate:Invoke (). * This is called once the first time a delegate is invoked, so it must be fast. */ gpointer mono_delegate_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp) { MonoDomain *domain = mono_domain_get (); MonoDelegate *delegate; MonoJitInfo *ji; MonoMethod *m; MonoMethod *method = NULL; gboolean multicast, callvirt = FALSE; gboolean need_rgctx_tramp = FALSE; gboolean need_unbox_tramp = FALSE; gboolean enable_caching = TRUE; MonoMethod *invoke = tramp_data [0]; guint8 *impl_this = tramp_data [1]; guint8 *impl_nothis = tramp_data [2]; MonoError err; MonoMethodSignature *sig; gpointer addr, compiled_method; trampoline_calls ++; /* Obtain the delegate object according to the calling convention */ delegate = mono_arch_get_this_arg_from_call (regs, code); if (delegate->method) { method = delegate->method; /* * delegate->method_ptr == NULL means the delegate was initialized by * mini_delegate_ctor, while != NULL means it is initialized by * mono_delegate_ctor_with_method (). In both cases, we need to add wrappers * (ctor_with_method () does this, but it doesn't store the wrapper back into * delegate->method). */ #ifndef DISABLE_REMOTING if (delegate->target && delegate->target->vtable->klass == mono_defaults.transparent_proxy_class) { #ifndef DISABLE_COM if (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class != mono_class_get_com_object_class () && !mono_class_is_com_object (((MonoTransparentProxy *)delegate->target)->remote_class->proxy_class)) #endif method = mono_marshal_get_remoting_invoke (method); } else #endif { mono_error_init (&err); sig = mono_method_signature_checked (method, &err); if (!sig) mono_error_raise_exception (&err); if (sig->hasthis && method->klass->valuetype) { if (mono_aot_only) need_unbox_tramp = TRUE; else method = mono_marshal_get_unbox_wrapper (method); } } } else { ji = mono_jit_info_table_find (domain, mono_get_addr_from_ftnptr (delegate->method_ptr)); if (ji) method = jinfo_get_method (ji); } if (method) { mono_error_init (&err); sig = mono_method_signature_checked (method, &err); if (!sig) mono_error_raise_exception (&err); callvirt = !delegate->target && sig->hasthis; if (delegate->target && method->flags & METHOD_ATTRIBUTE_VIRTUAL && method->flags & METHOD_ATTRIBUTE_ABSTRACT && method->klass->flags & TYPE_ATTRIBUTE_ABSTRACT) { method = mono_object_get_virtual_method (delegate->target, method); enable_caching = FALSE; } } if (method && method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) method = mono_marshal_get_synchronized_wrapper (method); if (method && mono_method_needs_static_rgctx_invoke (method, FALSE)) need_rgctx_tramp = TRUE; /* * If the called address is a trampoline, replace it with the compiled method so * further calls don't have to go through the trampoline. */ if (method && !callvirt) { /* Avoid the overhead of looking up an already compiled method if possible */ if (enable_caching && delegate->method_code && *delegate->method_code) { delegate->method_ptr = *delegate->method_code; } else { compiled_method = addr = mono_compile_method (method); addr = mini_add_method_trampoline (NULL, method, compiled_method, need_rgctx_tramp, need_unbox_tramp); delegate->method_ptr = addr; if (enable_caching && delegate->method_code) *delegate->method_code = delegate->method_ptr; } } else { if (need_rgctx_tramp) delegate->method_ptr = mono_create_static_rgctx_trampoline (method, delegate->method_ptr); } multicast = ((MonoMulticastDelegate*)delegate)->prev != NULL; if (!multicast && !callvirt) { if (method && (method->flags & METHOD_ATTRIBUTE_STATIC) && mono_method_signature (method)->param_count == mono_method_signature (invoke)->param_count + 1) /* Closed static delegate */ code = impl_this; else code = delegate->target ? impl_this : impl_nothis; if (code) { delegate->invoke_impl = mono_get_addr_from_ftnptr (code); return code; } } /* The general, unoptimized case */ m = mono_marshal_get_delegate_invoke (invoke, delegate); code = mono_compile_method (m); code = mini_add_method_trampoline (NULL, m, code, mono_method_needs_static_rgctx_invoke (m, FALSE), FALSE); delegate->invoke_impl = mono_get_addr_from_ftnptr (code); return code; } #endif #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD static gpointer mono_handler_block_guard_trampoline (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp) { MonoContext ctx; MonoException *exc; MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id); gpointer resume_ip = jit_tls->handler_block_return_address; memcpy (&ctx, &jit_tls->handler_block_context, sizeof (MonoContext)); MONO_CONTEXT_SET_IP (&ctx, jit_tls->handler_block_return_address); jit_tls->handler_block_return_address = NULL; jit_tls->handler_block = NULL; if (!resume_ip) /*this should not happen, but we should avoid crashing */ exc = mono_get_exception_execution_engine ("Invalid internal state, resuming abort after handler block but no resume ip found"); else exc = mono_thread_resume_interruption (); if (exc) { mono_handle_exception (&ctx, exc); mono_restore_context (&ctx); } return resume_ip; } gpointer mono_create_handler_block_trampoline (void) { static gpointer code; if (code) { mono_memory_barrier (); return code; } if (mono_aot_only) { g_assert (0); return code; } mono_trampolines_lock (); if (!code) { gpointer tmp = mono_arch_create_handler_block_trampoline (); mono_memory_barrier (); code = tmp; } mono_trampolines_unlock (); return code; } #endif /* * mono_get_trampoline_func: * * Return the C function which needs to be called by the generic trampoline of type * TRAMP_TYPE. */ gconstpointer mono_get_trampoline_func (MonoTrampolineType tramp_type) { switch (tramp_type) { case MONO_TRAMPOLINE_JIT: case MONO_TRAMPOLINE_JUMP: return mono_magic_trampoline; case MONO_TRAMPOLINE_CLASS_INIT: return mono_class_init_trampoline; case MONO_TRAMPOLINE_GENERIC_CLASS_INIT: return mono_generic_class_init_trampoline; case MONO_TRAMPOLINE_RGCTX_LAZY_FETCH: return mono_rgctx_lazy_fetch_trampoline; #ifdef MONO_ARCH_AOT_SUPPORTED case MONO_TRAMPOLINE_AOT: return mono_aot_trampoline; case MONO_TRAMPOLINE_AOT_PLT: return mono_aot_plt_trampoline; #endif #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE case MONO_TRAMPOLINE_DELEGATE: return mono_delegate_trampoline; #endif case MONO_TRAMPOLINE_RESTORE_STACK_PROT: return mono_altstack_restore_prot; #ifndef DISABLE_REMOTING case MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING: return mono_generic_virtual_remoting_trampoline; #endif case MONO_TRAMPOLINE_MONITOR_ENTER: return mono_monitor_enter_trampoline; case MONO_TRAMPOLINE_MONITOR_EXIT: return mono_monitor_exit_trampoline; case MONO_TRAMPOLINE_VCALL: return mono_vcall_trampoline; #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD case MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD: return mono_handler_block_guard_trampoline; #endif default: g_assert_not_reached (); return NULL; } } static guchar* create_trampoline_code (MonoTrampolineType tramp_type) { MonoTrampInfo *info; guchar *code; code = mono_arch_create_generic_trampoline (tramp_type, &info, FALSE); mono_tramp_info_register (info); return code; } void mono_trampolines_init (void) { InitializeCriticalSection (&trampolines_mutex); if (mono_aot_only) return; mono_trampoline_code [MONO_TRAMPOLINE_JIT] = create_trampoline_code (MONO_TRAMPOLINE_JIT); mono_trampoline_code [MONO_TRAMPOLINE_JUMP] = create_trampoline_code (MONO_TRAMPOLINE_JUMP); mono_trampoline_code [MONO_TRAMPOLINE_CLASS_INIT] = create_trampoline_code (MONO_TRAMPOLINE_CLASS_INIT); mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_CLASS_INIT] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_CLASS_INIT); mono_trampoline_code [MONO_TRAMPOLINE_RGCTX_LAZY_FETCH] = create_trampoline_code (MONO_TRAMPOLINE_RGCTX_LAZY_FETCH); #ifdef MONO_ARCH_AOT_SUPPORTED mono_trampoline_code [MONO_TRAMPOLINE_AOT] = create_trampoline_code (MONO_TRAMPOLINE_AOT); mono_trampoline_code [MONO_TRAMPOLINE_AOT_PLT] = create_trampoline_code (MONO_TRAMPOLINE_AOT_PLT); #endif #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE mono_trampoline_code [MONO_TRAMPOLINE_DELEGATE] = create_trampoline_code (MONO_TRAMPOLINE_DELEGATE); #endif mono_trampoline_code [MONO_TRAMPOLINE_RESTORE_STACK_PROT] = create_trampoline_code (MONO_TRAMPOLINE_RESTORE_STACK_PROT); #ifndef DISABLE_REMOTING mono_trampoline_code [MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING] = create_trampoline_code (MONO_TRAMPOLINE_GENERIC_VIRTUAL_REMOTING); #endif mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_ENTER] = create_trampoline_code (MONO_TRAMPOLINE_MONITOR_ENTER); mono_trampoline_code [MONO_TRAMPOLINE_MONITOR_EXIT] = create_trampoline_code (MONO_TRAMPOLINE_MONITOR_EXIT); mono_trampoline_code [MONO_TRAMPOLINE_VCALL] = create_trampoline_code (MONO_TRAMPOLINE_VCALL); #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD mono_trampoline_code [MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD] = create_trampoline_code (MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD); mono_create_handler_block_trampoline (); #endif mono_counters_register ("Calls to trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &trampoline_calls); mono_counters_register ("JIT trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &jit_trampolines); mono_counters_register ("Unbox trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &unbox_trampolines); mono_counters_register ("Static rgctx trampolines", MONO_COUNTER_JIT | MONO_COUNTER_INT, &static_rgctx_trampolines); } void mono_trampolines_cleanup (void) { if (class_init_hash_addr) g_hash_table_destroy (class_init_hash_addr); if (rgctx_lazy_fetch_trampoline_hash) g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash); if (rgctx_lazy_fetch_trampoline_hash_addr) g_hash_table_destroy (rgctx_lazy_fetch_trampoline_hash_addr); DeleteCriticalSection (&trampolines_mutex); } guint8 * mono_get_trampoline_code (MonoTrampolineType tramp_type) { g_assert (mono_trampoline_code [tramp_type]); return mono_trampoline_code [tramp_type]; } gpointer mono_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len) { if (mono_aot_only) return mono_aot_create_specific_trampoline (mono_defaults.corlib, arg1, tramp_type, domain, code_len); else return mono_arch_create_specific_trampoline (arg1, tramp_type, domain, code_len); } gpointer mono_create_class_init_trampoline (MonoVTable *vtable) { gpointer code, ptr; MonoDomain *domain = vtable->domain; g_assert (!vtable->klass->generic_container); /* previously created trampoline code */ mono_domain_lock (domain); ptr = g_hash_table_lookup (domain_jit_info (domain)->class_init_trampoline_hash, vtable); mono_domain_unlock (domain); if (ptr) return ptr; code = mono_create_specific_trampoline (vtable, MONO_TRAMPOLINE_CLASS_INIT, domain, NULL); ptr = mono_create_ftnptr (domain, code); /* store trampoline address */ mono_domain_lock (domain); g_hash_table_insert (domain_jit_info (domain)->class_init_trampoline_hash, vtable, ptr); mono_domain_unlock (domain); mono_trampolines_lock (); if (!class_init_hash_addr) class_init_hash_addr = g_hash_table_new (NULL, NULL); g_hash_table_insert (class_init_hash_addr, ptr, vtable); mono_trampolines_unlock (); return ptr; } gpointer mono_create_generic_class_init_trampoline (void) { #ifdef MONO_ARCH_VTABLE_REG static gpointer code; MonoTrampInfo *info; mono_trampolines_lock (); if (!code) { if (mono_aot_only) /* get_named_code () might return an ftnptr, but our caller expects a direct pointer */ code = mono_get_addr_from_ftnptr (mono_aot_get_trampoline ("generic_class_init_trampoline")); else { code = mono_arch_create_generic_class_init_trampoline (&info, FALSE); mono_tramp_info_register (info); } } mono_trampolines_unlock (); return code; #else g_assert_not_reached (); #endif } gpointer mono_create_jump_trampoline (MonoDomain *domain, MonoMethod *method, gboolean add_sync_wrapper) { MonoJitInfo *ji; gpointer code; guint32 code_size = 0; code = mono_jit_find_compiled_method_with_jit_info (domain, method, &ji); /* * We cannot recover the correct type of a shared generic * method from its native code address, so we use the * trampoline instead. * For synchronized methods, the trampoline adds the wrapper. */ if (code && !ji->has_generic_jit_info && !(method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)) return code; mono_domain_lock (domain); code = g_hash_table_lookup (domain_jit_info (domain)->jump_trampoline_hash, method); mono_domain_unlock (domain); if (code) return code; code = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JUMP, mono_domain_get (), &code_size); g_assert (code_size); ji = mono_domain_alloc0 (domain, MONO_SIZEOF_JIT_INFO); ji->code_start = code; ji->code_size = code_size; ji->d.method = method; /* * mono_delegate_ctor needs to find the method metadata from the * trampoline address, so we save it here. */ mono_jit_info_table_add (domain, ji); mono_domain_lock (domain); g_hash_table_insert (domain_jit_info (domain)->jump_trampoline_hash, method, ji->code_start); mono_domain_unlock (domain); return ji->code_start; } gpointer mono_create_jit_trampoline_in_domain (MonoDomain *domain, MonoMethod *method) { gpointer tramp; if (mono_aot_only) { /* Avoid creating trampolines if possible */ gpointer code = mono_jit_find_compiled_method (domain, method); if (code) return code; } mono_domain_lock (domain); tramp = g_hash_table_lookup (domain_jit_info (domain)->jit_trampoline_hash, method); mono_domain_unlock (domain); if (tramp) return tramp; tramp = mono_create_specific_trampoline (method, MONO_TRAMPOLINE_JIT, domain, NULL); mono_domain_lock (domain); g_hash_table_insert (domain_jit_info (domain)->jit_trampoline_hash, method, tramp); mono_domain_unlock (domain); jit_trampolines++; return tramp; } gpointer mono_create_jit_trampoline (MonoMethod *method) { return mono_create_jit_trampoline_in_domain (mono_domain_get (), method); } gpointer mono_create_jit_trampoline_from_token (MonoImage *image, guint32 token) { gpointer tramp; MonoDomain *domain = mono_domain_get (); guint8 *buf, *start; buf = start = mono_domain_alloc0 (domain, 2 * sizeof (gpointer)); *(gpointer*)(gpointer)buf = image; buf += sizeof (gpointer); *(guint32*)(gpointer)buf = token; tramp = mono_create_specific_trampoline (start, MONO_TRAMPOLINE_AOT, domain, NULL); jit_trampolines++; return tramp; } gpointer mono_create_delegate_trampoline (MonoDomain *domain, MonoClass *klass) { #ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE gpointer ptr; guint32 code_size = 0; gpointer *tramp_data; MonoMethod *invoke; mono_domain_lock (domain); ptr = g_hash_table_lookup (domain_jit_info (domain)->delegate_trampoline_hash, klass); mono_domain_unlock (domain); if (ptr) return ptr; // Precompute the delegate invoke impl and pass it to the delegate trampoline invoke = mono_get_delegate_invoke (klass); g_assert (invoke); tramp_data = mono_domain_alloc (domain, sizeof (gpointer) * 3); tramp_data [0] = invoke; tramp_data [1] = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), TRUE); tramp_data [2] = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), FALSE); ptr = mono_create_specific_trampoline (tramp_data, MONO_TRAMPOLINE_DELEGATE, domain, &code_size); g_assert (code_size); /* store trampoline address */ mono_domain_lock (domain); g_hash_table_insert (domain_jit_info (domain)->delegate_trampoline_hash, klass, ptr); mono_domain_unlock (domain); return ptr; #else return NULL; #endif } gpointer mono_create_rgctx_lazy_fetch_trampoline (guint32 offset) { static gboolean inited = FALSE; static int num_trampolines = 0; MonoTrampInfo *info; gpointer tramp, ptr; mono_trampolines_lock (); if (rgctx_lazy_fetch_trampoline_hash) tramp = g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset)); else tramp = NULL; mono_trampolines_unlock (); if (tramp) return tramp; if (mono_aot_only) { ptr = mono_aot_get_lazy_fetch_trampoline (offset); } else { tramp = mono_arch_create_rgctx_lazy_fetch_trampoline (offset, &info, FALSE); mono_tramp_info_register (info); ptr = mono_create_ftnptr (mono_get_root_domain (), tramp); } mono_trampolines_lock (); if (!rgctx_lazy_fetch_trampoline_hash) { rgctx_lazy_fetch_trampoline_hash = g_hash_table_new (NULL, NULL); rgctx_lazy_fetch_trampoline_hash_addr = g_hash_table_new (NULL, NULL); } g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash, GUINT_TO_POINTER (offset), ptr); g_assert (offset != -1); g_hash_table_insert (rgctx_lazy_fetch_trampoline_hash_addr, ptr, GUINT_TO_POINTER (offset + 1)); mono_trampolines_unlock (); if (!inited) { mono_counters_register ("RGCTX num lazy fetch trampolines", MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &num_trampolines); inited = TRUE; } num_trampolines++; return ptr; } gpointer mono_create_monitor_enter_trampoline (void) { static gpointer code; if (mono_aot_only) { if (!code) code = mono_aot_get_trampoline ("monitor_enter_trampoline"); return code; } #ifdef MONO_ARCH_MONITOR_OBJECT_REG mono_trampolines_lock (); if (!code) { MonoTrampInfo *info; code = mono_arch_create_monitor_enter_trampoline (&info, FALSE); mono_tramp_info_register (info); } mono_trampolines_unlock (); #else code = NULL; g_assert_not_reached (); #endif return code; } gpointer mono_create_monitor_exit_trampoline (void) { static gpointer code; if (mono_aot_only) { if (!code) code = mono_aot_get_trampoline ("monitor_exit_trampoline"); return code; } #ifdef MONO_ARCH_MONITOR_OBJECT_REG mono_trampolines_lock (); if (!code) { MonoTrampInfo *info; code = mono_arch_create_monitor_exit_trampoline (&info, FALSE); mono_tramp_info_register (info); } mono_trampolines_unlock (); #else code = NULL; g_assert_not_reached (); #endif return code; } #ifdef MONO_ARCH_LLVM_SUPPORTED /* * mono_create_llvm_imt_trampoline: * * LLVM compiled code can't pass in the IMT argument, so we use this trampoline, which * sets the IMT argument, then branches to the contents of the vtable slot given by * vt_offset in the vtable which is obtained from the argument list. */ gpointer mono_create_llvm_imt_trampoline (MonoDomain *domain, MonoMethod *m, int vt_offset) { #ifdef MONO_ARCH_HAVE_LLVM_IMT_TRAMPOLINE return mono_arch_get_llvm_imt_trampoline (domain, m, vt_offset); #else g_assert_not_reached (); return NULL; #endif } #endif MonoVTable* mono_find_class_init_trampoline_by_addr (gconstpointer addr) { MonoVTable *res; mono_trampolines_lock (); if (class_init_hash_addr) res = g_hash_table_lookup (class_init_hash_addr, addr); else res = NULL; mono_trampolines_unlock (); return res; } guint32 mono_find_rgctx_lazy_fetch_trampoline_by_addr (gconstpointer addr) { int offset; mono_trampolines_lock (); if (rgctx_lazy_fetch_trampoline_hash_addr) { /* We store the real offset + 1 so we can detect when the lookup fails */ offset = GPOINTER_TO_INT (g_hash_table_lookup (rgctx_lazy_fetch_trampoline_hash_addr, addr)); if (offset) offset -= 1; else offset = -1; } else { offset = -1; } mono_trampolines_unlock (); return offset; } static const char*tramp_names [MONO_TRAMPOLINE_NUM] = { "jit", "jump", "class_init", "generic_class_init", "rgctx_lazy_fetch", "aot", "aot_plt", "delegate", "restore_stack_prot", "generic_virtual_remoting", "monitor_enter", "monitor_exit", "vcall", "handler_block_guard" }; /* * mono_get_generic_trampoline_name: * * Returns a pointer to malloc-ed memory. */ char* mono_get_generic_trampoline_name (MonoTrampolineType tramp_type) { return g_strdup_printf ("generic_trampoline_%s", tramp_names [tramp_type]); } /* * mono_get_rgctx_fetch_trampoline_name: * * Returns a pointer to malloc-ed memory. */ char* mono_get_rgctx_fetch_trampoline_name (int slot) { gboolean mrgctx; int index; mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot); index = MONO_RGCTX_SLOT_INDEX (slot); return g_strdup_printf ("rgctx_fetch_trampoline_%s_%d", mrgctx ? "mrgctx" : "rgctx", index); } gpointer mini_get_nullified_class_init_trampoline (void) { static gpointer nullified_class_init_trampoline; if (!nullified_class_init_trampoline) { gpointer tramp; MonoTrampInfo *info; if (mono_aot_only) { tramp = mono_aot_get_trampoline ("nullified_class_init_trampoline"); } else { tramp = mono_arch_get_nullified_class_init_trampoline (&info); mono_tramp_info_register (info); } mono_memory_barrier (); nullified_class_init_trampoline = tramp; } return nullified_class_init_trampoline; }