/** * \file * (C) 2003 Ximian, Inc. * (C) 2003-2011 Novell, Inc. * Copyright 2011 Xamarin, Inc (http://www.xamarin.com) * Licensed under the MIT license. See LICENSE file in the project root for full license information. */ #include #include #include #include #include #include #include #include #include #include #include #include #include "mini.h" #include "lldb.h" #ifdef ENABLE_INTERPRETER #include "interp/interp.h" #endif /* * 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 *rgctx_lazy_fetch_trampoline_hash; static GHashTable *rgctx_lazy_fetch_trampoline_hash_addr; static gint32 trampoline_calls; static gint32 jit_trampolines; static gint32 unbox_trampolines; static gint32 static_rgctx_trampolines; static gint32 rgctx_unmanaged_lookups; static gint32 rgctx_num_lazy_fetch_trampolines; #define mono_trampolines_lock() mono_os_mutex_lock (&trampolines_mutex) #define mono_trampolines_unlock() mono_os_mutex_unlock (&trampolines_mutex) static mono_mutex_t 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 = (const RgctxTrampInfo *)ka; const RgctxTrampInfo *i2 = (const RgctxTrampInfo *)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 = (const RgctxTrampInfo *)data; return GPOINTER_TO_UINT (info->m) ^ GPOINTER_TO_UINT (info->addr); } /** * mono_create_static_rgctx_trampoline: * \param m the mono method to create a trampoline for * \param addr the address to jump to (where the compiled code for M lives) * * Creates 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. * * \returns the generated static rgctx trampoline. */ 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 (ctx, addr); mono_domain_lock (domain); /* Duplicates inserted while we didn't hold the lock are OK */ info = (RgctxTrampInfo *)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); UnlockedIncrement (&static_rgctx_trampolines); mono_domain_unlock (domain); 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 #if 0 #define DEBUG_IMT(stmt) do { stmt; } while (0) #else #define DEBUG_IMT(stmt) do { } while (0) #endif /* * mini_resolve_imt_method: * * Resolve the actual method called when making an IMT call through VTABLE_SLOT with IMT_METHOD as the interface method. * * Either IMPL_METHOD or OUT_AOT_ADDR will be set on return. */ gpointer* mini_resolve_imt_method (MonoVTable *vt, gpointer *vtable_slot, MonoMethod *imt_method, MonoMethod **impl_method, gpointer *out_aot_addr, gboolean *out_need_rgctx_tramp, MonoMethod **variant_iface, MonoError *error) { MonoMethod *impl = NULL, *generic_virtual = NULL; gboolean lookup_aot, variance_used = FALSE, need_rgctx_tramp = FALSE; gpointer addr; guint8 *aot_addr = NULL; int displacement = vtable_slot - ((gpointer*)vt); int interface_offset; int imt_slot = MONO_IMT_SIZE + displacement; g_assert (imt_slot < MONO_IMT_SIZE); error_init (error); /* 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, MONO_TYPE_NAME_FORMAT_IL), mono_type_get_name_full (&imt_method->klass->byval_arg, MONO_TYPE_NAME_FORMAT_IL)); *variant_iface = NULL; if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) { /* Generic virtual method */ generic_virtual = imt_method; need_rgctx_tramp = TRUE; } else if (variance_used && mono_class_has_variant_generic_params (imt_method->klass)) { *variant_iface = imt_method; } addr = NULL; /* We can only use the AOT compiled code if we don't require further processing */ lookup_aot = !generic_virtual & !variant_iface; if (!mono_llvm_only) 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 (mono_class_is_ginst (impl->klass)) context.class_inst = mono_class_get_generic_class (impl->klass)->context.class_inst; context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst; impl = mono_class_inflate_generic_method_checked (impl, &context, error); mono_error_assert_ok (error); } else { /* Avoid loading metadata or creating a generic vtable if possible */ if (lookup_aot && !vt->klass->valuetype) { aot_addr = (guint8 *)mono_aot_get_method_from_vt_slot (mono_domain_get (), vt, interface_offset + mono_method_get_vtable_slot (imt_method), error); return_val_if_nok (error, NULL); } 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) need_rgctx_tramp = TRUE; } *impl_method = impl; *out_need_rgctx_tramp = need_rgctx_tramp; *out_aot_addr = aot_addr; 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)); if (vt->imt_collisions_bitmap & (1 << imt_slot)) { int slot = mono_method_get_vtable_index (imt_method); int vtable_offset; g_assert (slot != -1); vtable_offset = interface_offset + slot; vtable_slot = & (vt->vtable [vtable_offset]); 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)); return vtable_slot; } else { DEBUG_IMT (printf ("mono_convert_imt_slot_to_vtable_slot: slot %p[%d] is in the IMT, but not colliding\n", slot, imt_slot)); return vtable_slot; } } /* * 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)->is_gsharedvt)) return TRUE; else return FALSE; } /** * mini_add_method_trampoline: * @m: * @compiled_method: * @add_static_rgctx_tramp: adds a static rgctx trampoline * @add_unbox_tramp: adds an unboxing trampoline * * Add static rgctx/gsharedvt_in/unbox trampolines to * M/COMPILED_METHOD if needed. * * Returns the trampoline address, or COMPILED_METHOD if no trampoline * is needed. */ gpointer mini_add_method_trampoline (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; // FIXME: This loads information from AOT (perf problem) ji = mini_jit_info_table_find (mono_domain_get (), (char *)mono_get_addr_from_ftnptr (compiled_method), NULL); 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 (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 && !ji->is_trampoline) jmethod = jinfo_get_method (ji); if (callee_gsharedvt && mini_is_gsharedvt_variable_signature (mono_method_signature (jmethod))) { 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 */ sig = mono_method_signature (m); gsig = mono_method_signature (jmethod); addr = mini_get_gsharedvt_wrapper (TRUE, addr, sig, gsig, -1, FALSE); if (mono_llvm_only) g_assert_not_reached (); //printf ("IN: %s\n", mono_method_full_name (m, TRUE)); } if (callee_array_helper) { add_static_rgctx_tramp = FALSE; /* In AOT mode, compiled_method points to one of the InternalArray methods in Array. */ if (ji && !mono_llvm_only && mono_method_needs_static_rgctx_invoke (jinfo_get_method (ji), TRUE)) add_static_rgctx_tramp = TRUE; } if (mono_llvm_only) add_static_rgctx_tramp = FALSE; if (add_static_rgctx_tramp) addr = mono_create_static_rgctx_trampoline (m, addr); return addr; } /* * mini_create_llvmonly_ftndesc: * * Create a function descriptor of the form , which * represents a callee ADDR with ARG as the last argument. * This is used for: * - generic sharing (ARG is the rgctx) * - gsharedvt signature wrappers (ARG is a function descriptor) */ MonoFtnDesc* mini_create_llvmonly_ftndesc (MonoDomain *domain, gpointer addr, gpointer arg) { MonoFtnDesc *ftndesc = (MonoFtnDesc*)mono_domain_alloc0 (mono_domain_get (), 2 * sizeof (gpointer)); ftndesc->addr = addr; ftndesc->arg = arg; return ftndesc; } /** * mini_add_method_wrappers_llvmonly: * * Add unbox/gsharedvt wrappers around COMPILED_METHOD if needed. Return the wrapper address or COMPILED_METHOD * if no wrapper is needed. Set OUT_ARG to the rgctx/extra argument needed to be passed to the returned method. */ gpointer mini_add_method_wrappers_llvmonly (MonoMethod *m, gpointer compiled_method, gboolean caller_gsharedvt, gboolean add_unbox_tramp, gpointer *out_arg) { gpointer addr; gboolean callee_gsharedvt, callee_array_helper; MonoMethod *jmethod = NULL; MonoJitInfo *ji; // FIXME: This loads information from AOT (perf problem) ji = mini_jit_info_table_find (mono_domain_get (), (char *)mono_get_addr_from_ftnptr (compiled_method), NULL); 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 (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); } } g_assert (mono_llvm_only); g_assert (out_arg); if (ji && !ji->is_trampoline) jmethod = jinfo_get_method (ji); if (callee_gsharedvt) callee_gsharedvt = mini_is_gsharedvt_variable_signature (mono_method_signature (jmethod)); if (!caller_gsharedvt && callee_gsharedvt) { MonoMethodSignature *sig, *gsig; gpointer wrapper_addr; /* 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 */ sig = mono_method_signature (m); gsig = mono_method_signature (jmethod); wrapper_addr = mini_get_gsharedvt_wrapper (TRUE, addr, sig, gsig, -1, FALSE); /* * This is a gsharedvt in wrapper, it gets passed a ftndesc for the gsharedvt method as an argument. */ *out_arg = mini_create_llvmonly_ftndesc (mono_domain_get (), addr, mini_method_get_rgctx (m)); addr = wrapper_addr; //printf ("IN: %s\n", mono_method_full_name (m, TRUE)); } if (!(*out_arg) && mono_method_needs_static_rgctx_invoke (m, FALSE)) *out_arg = mini_method_get_rgctx (m); if (caller_gsharedvt && !callee_gsharedvt) { /* * The callee uses the gsharedvt calling convention, have to add an out wrapper. */ gpointer out_wrapper = mini_get_gsharedvt_wrapper (FALSE, NULL, mono_method_signature (m), NULL, -1, FALSE); MonoFtnDesc *out_wrapper_arg = mini_create_llvmonly_ftndesc (mono_domain_get (), addr, *out_arg); addr = out_wrapper; *out_arg = out_wrapper_arg; } 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, MonoVTable *vt, gpointer *vtable_slot, MonoError *error) { gpointer addr, compiled_method; gboolean generic_shared = FALSE; gboolean need_unbox_tramp = FALSE; gboolean need_rgctx_tramp = FALSE; MonoMethod *declaring = NULL; MonoMethod *generic_virtual = NULL, *variant_iface = NULL; int context_used; gboolean imt_call, virtual_; gpointer *orig_vtable_slot, *vtable_slot_to_patch = NULL; MonoJitInfo *ji = NULL; error_init (error); virtual_ = vt && (gpointer)vtable_slot > (gpointer)vt; imt_call = vt && (gpointer)vtable_slot < (gpointer)vt; /* * rgctx trampolines are needed when the call is indirect so the caller can't pass * the rgctx argument needed by the callee. */ if (virtual_ && m) need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (m, FALSE); orig_vtable_slot = vtable_slot; vtable_slot_to_patch = vtable_slot; /* IMT call */ if (imt_call) { MonoMethod *imt_method = NULL, *impl_method = NULL; MonoObject *this_arg; g_assert (vtable_slot); imt_method = mono_arch_find_imt_method (regs, code); this_arg = (MonoObject *)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, imt_method); vtable_slot_to_patch = NULL; } else { if (imt_method->is_inflated && ((MonoMethodInflated*)imt_method)->context.method_inst) { /* Generic virtual method */ generic_virtual = imt_method; need_rgctx_tramp = TRUE; } vtable_slot = mini_resolve_imt_method (vt, vtable_slot, imt_method, &impl_method, &addr, &need_rgctx_tramp, &variant_iface, error); return_val_if_nok (error, NULL); /* We must handle magic interfaces on rank 1 arrays of ref types as if they were variant */ if (!variant_iface && vt->klass->rank == 1 && !vt->klass->element_class->valuetype && imt_method->klass->is_array_special_interface) variant_iface = imt_method; /* This is the vcall slot which gets called through the IMT trampoline */ vtable_slot_to_patch = vtable_slot; 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; } } /* * 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 (mono_class_is_ginst (m->klass)) context.class_inst = mono_class_get_generic_class (m->klass)->context.class_inst; else g_assert (!mono_class_is_gtd (m->klass)); generic_virtual = mono_arch_find_imt_method (regs, code); g_assert (generic_virtual); g_assert (generic_virtual->is_inflated); context.method_inst = ((MonoMethodInflated*)generic_virtual)->context.method_inst; m = mono_class_inflate_generic_method_checked (declaring, &context, error); mono_error_assert_ok (error); /* 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); /* * The caller is gshared code, compute the actual method to call from M and this/rgctx. */ if (m->is_inflated && mono_method_get_context (m)->method_inst) { MonoMethodRuntimeGenericContext *mrgctx = (MonoMethodRuntimeGenericContext*)mono_arch_find_static_call_vtable (regs, code); klass = mrgctx->class_vtable->klass; method_inst = mrgctx->method_inst; } else if ((m->flags & METHOD_ATTRIBUTE_STATIC) || m->klass->valuetype) { MonoVTable *vtable = mono_arch_find_static_call_vtable (regs, code); klass = vtable->klass; } else { MonoObject *this_argument = (MonoObject *)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); if (!vtable_slot) { mono_class_setup_supertypes (this_argument->vtable->klass); klass = this_argument->vtable->klass->supertypes [m->klass->idepth - 1]; } } 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 (mono_class_is_ginst (klass)) context.class_inst = mono_class_get_generic_class (klass)->context.class_inst; else if (mono_class_is_gtd (klass)) context.class_inst = mono_class_get_generic_container (klass)->context.class_inst; context.method_inst = method_inst; actual_method = mono_class_inflate_generic_method_checked (declaring, &context, error); mono_error_assert_ok (error); } 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_jit_compile_method (m, error); if (!addr) return NULL; 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 (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 = (GSList *)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 = (gpointer *)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 (), (char *)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 (code, plt_entry, NULL, regs, (guint8 *)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 (), (char *)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 LLVM_API_VERSION > 100 /* LLVM code doesn't make direct calls */ if (ji && ji->from_llvm) no_patch = TRUE; #endif if (!no_patch && mono_method_same_domain (ji, target_ji)) mono_arch_patch_callsite ((guint8 *)ji->code_start, code, (guint8 *)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) { gpointer res; MonoError error; MONO_REQ_GC_UNSAFE_MODE; g_assert (mono_thread_is_gc_unsafe_mode ()); UnlockedIncrement (&trampoline_calls); res = common_call_trampoline (regs, code, (MonoMethod *)arg, NULL, NULL, &error); if (!is_ok (&error)) { mono_error_set_pending_exception (&error); return NULL; } return res; } /** * mono_vcall_trampoline: * * This trampoline handles virtual calls. */ static gpointer mono_vcall_trampoline (mgreg_t *regs, guint8 *code, int slot, guint8 *tramp) { MONO_REQ_GC_UNSAFE_MODE; MonoObject *this_arg; MonoVTable *vt; gpointer *vtable_slot; MonoMethod *m; MonoError error; gpointer addr, res = NULL; UnlockedIncrement (&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. */ /* * Obtain the vtable from the 'this' arg. */ this_arg = (MonoObject *)mono_arch_get_this_arg_from_call (regs, code); g_assert (this_arg); vt = this_arg->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, &error); if (!is_ok (&error)) goto leave; 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); } else { /* IMT call */ vtable_slot = &(((gpointer*)vt) [slot]); m = NULL; } res = common_call_trampoline (regs, code, m, vt, vtable_slot, &error); leave: if (!mono_error_ok (&error)) { mono_error_set_pending_exception (&error); return NULL; } return res; } #ifndef DISABLE_REMOTING gpointer mono_generic_virtual_remoting_trampoline (mgreg_t *regs, guint8 *code, MonoMethod *m, guint8 *tramp) { MONO_REQ_GC_UNSAFE_MODE; MonoError error; MonoGenericContext context = { NULL, NULL }; MonoMethod *imt_method, *declaring; gpointer addr; UnlockedIncrement (&trampoline_calls); g_assert (m->is_generic); if (m->is_inflated) declaring = mono_method_get_declaring_generic_method (m); else declaring = m; if (mono_class_is_ginst (m->klass)) context.class_inst = mono_class_get_generic_class (m->klass)->context.class_inst; else g_assert (!mono_class_is_gtd (m->klass)); imt_method = mono_arch_find_imt_method (regs, code); if (imt_method->is_inflated) context.method_inst = ((MonoMethodInflated*)imt_method)->context.method_inst; m = mono_class_inflate_generic_method_checked (declaring, &context, &error); g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */; m = mono_marshal_get_remoting_invoke_with_check (m); addr = mono_jit_compile_method (m, &error); if (!mono_error_ok (&error)) { mono_error_set_pending_exception (&error); return NULL; } 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) { MONO_REQ_GC_UNSAFE_MODE; MonoImage *image; guint32 token; MonoMethod *method = NULL; gpointer addr; guint8 *plt_entry; MonoError error; UnlockedIncrement (&trampoline_calls); image = (MonoImage *)*(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, &error); if (!is_ok (&error)) mono_error_cleanup (&error); if (!addr) { method = mono_get_method_checked (image, token, NULL, NULL, &error); if (!method) g_error ("Could not load AOT trampoline due to %s", mono_error_get_message (&error)); /* 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 (code, plt_entry, NULL, regs, (guint8 *)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) { MONO_REQ_GC_UNSAFE_MODE; guint32 plt_info_offset = mono_aot_get_plt_info_offset (regs, code); gpointer res; MonoError error; UnlockedIncrement (&trampoline_calls); res = mono_aot_plt_resolve (aot_module, plt_info_offset, code, &error); if (!res) { if (!mono_error_ok (&error)) { mono_error_set_pending_exception (&error); return NULL; } // FIXME: Error handling (how ?) g_assert (res); } return res; } #endif static gpointer mono_rgctx_lazy_fetch_trampoline (mgreg_t *regs, guint8 *code, gpointer data, guint8 *tramp) { MONO_REQ_GC_UNSAFE_MODE; 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); MonoError error; gpointer res; UnlockedIncrement (&trampoline_calls); UnlockedIncrement (&rgctx_unmanaged_lookups); if (mrgctx) res = mono_method_fill_runtime_generic_context ((MonoMethodRuntimeGenericContext *)arg, index, &error); else res = mono_class_fill_runtime_generic_context ((MonoVTable *)arg, index, &error); if (!mono_error_ok (&error)) { mono_error_set_pending_exception (&error); return NULL; } return res; } /** * 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 *arg, guint8* tramp) { MONO_REQ_GC_UNSAFE_MODE; MonoDomain *domain = mono_domain_get (); MonoDelegate *delegate; MonoJitInfo *ji; MonoMethod *m; MonoMethod *method = NULL; MonoError error; gboolean multicast, callvirt = FALSE, closed_over_null = FALSE; gboolean need_rgctx_tramp = FALSE; gboolean need_unbox_tramp = FALSE; gboolean enable_caching = TRUE; MonoDelegateTrampInfo *tramp_info = (MonoDelegateTrampInfo*)arg; MonoMethod *invoke = tramp_info->invoke; guint8 *impl_this = (guint8 *)tramp_info->impl_this; guint8 *impl_nothis = (guint8 *)tramp_info->impl_nothis; MonoError err; MonoMethodSignature *sig; gpointer addr, compiled_method; gboolean is_remote = FALSE; UnlockedIncrement (&trampoline_calls); /* Obtain the delegate object according to the calling convention */ delegate = (MonoDelegate *)mono_arch_get_this_arg_from_call (regs, code); g_assert (mono_class_has_parent (mono_object_class (delegate), mono_defaults.multicastdelegate_class)); 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 && mono_object_is_transparent_proxy (delegate->target)) { is_remote = TRUE; #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); } #endif if (!is_remote) { sig = tramp_info->sig; if (!(sig && method == tramp_info->method)) { error_init (&err); sig = mono_method_signature_checked (method, &err); if (!sig) { mono_error_set_pending_exception (&err); return NULL; } } if (sig->hasthis && method->klass->valuetype) { gboolean need_unbox = TRUE; if (tramp_info->invoke_sig->param_count > sig->param_count && tramp_info->invoke_sig->params [0]->byref) need_unbox = FALSE; if (need_unbox) { if (mono_aot_only) need_unbox_tramp = TRUE; else method = mono_marshal_get_unbox_wrapper (method); } } } // If "delegate->method_ptr" is null mono_get_addr_from_ftnptr will fail if // ftnptrs are being used. "method" would end up null on archtitectures without // ftnptrs so we can just skip this. } else if (delegate->method_ptr) { ji = mono_jit_info_table_find (domain, (char *)mono_get_addr_from_ftnptr (delegate->method_ptr)); if (ji) method = jinfo_get_method (ji); } if (method) { sig = tramp_info->sig; if (!(sig && method == tramp_info->method)) { error_init (&err); sig = mono_method_signature_checked (method, &err); if (!sig) { mono_error_set_pending_exception (&err); return NULL; } } callvirt = !delegate->target && sig->hasthis; if (callvirt) closed_over_null = tramp_info->invoke_sig->param_count == sig->param_count; if (callvirt && !closed_over_null) { /* * The delegate needs to make a virtual call to the target method using its * first argument as the receiver. This is hard to support in full-aot, so * optimize it in some cases if possible. * If the target method is not virtual or is in a sealed class, * the vcall will call it directly. * If the call doesn't return a valuetype, then the vcall uses the same calling * convention as a normal call. */ if ((mono_class_is_sealed (method->klass) || !(method->flags & METHOD_ATTRIBUTE_VIRTUAL)) && !MONO_TYPE_ISSTRUCT (sig->ret)) { callvirt = FALSE; enable_caching = FALSE; } } if (delegate->target && method->flags & METHOD_ATTRIBUTE_VIRTUAL && method->flags & METHOD_ATTRIBUTE_ABSTRACT && mono_class_is_abstract (method->klass)) { method = mono_object_get_virtual_method (delegate->target, method); enable_caching = FALSE; } if (method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) method = mono_marshal_get_synchronized_wrapper (method); if (method == tramp_info->method) need_rgctx_tramp = tramp_info->need_rgctx_tramp; else if (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_jit_compile_method (method, &error); if (!mono_error_ok (&error)) { mono_error_set_pending_exception (&error); return NULL; } addr = mini_add_method_trampoline (method, compiled_method, need_rgctx_tramp, need_unbox_tramp); delegate->method_ptr = addr; if (enable_caching && delegate->method_code) *delegate->method_code = (guint8 *)delegate->method_ptr; } } else { if (need_rgctx_tramp) delegate->method_ptr = mono_create_static_rgctx_trampoline (method, delegate->method_ptr); } /* Necessary for !code condition to fallback to slow path */ code = NULL; multicast = ((MonoMulticastDelegate*)delegate)->delegates != 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) { /* The general, unoptimized case */ m = mono_marshal_get_delegate_invoke (invoke, delegate); code = (guint8 *)mono_jit_compile_method (m, &error); if (!mono_error_ok (&error)) { mono_error_set_pending_exception (&error); return NULL; } code = (guint8 *)mini_add_method_trampoline (m, code, mono_method_needs_static_rgctx_invoke (m, FALSE), FALSE); } delegate->invoke_impl = mono_get_addr_from_ftnptr (code); if (enable_caching && !callvirt && tramp_info->method) { tramp_info->method_ptr = delegate->method_ptr; tramp_info->invoke_impl = delegate->invoke_impl; } return code; } /* * 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_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 case MONO_TRAMPOLINE_DELEGATE: return mono_delegate_trampoline; 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_VCALL: return mono_vcall_trampoline; 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, NULL); return code; } void mono_trampolines_init (void) { mono_os_mutex_init_recursive (&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_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 mono_trampoline_code [MONO_TRAMPOLINE_DELEGATE] = create_trampoline_code (MONO_TRAMPOLINE_DELEGATE); 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_VCALL] = create_trampoline_code (MONO_TRAMPOLINE_VCALL); 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); mono_counters_register ("RGCTX unmanaged lookups", MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &rgctx_unmanaged_lookups); mono_counters_register ("RGCTX num lazy fetch trampolines", MONO_COUNTER_GENERICS | MONO_COUNTER_INT, &rgctx_num_lazy_fetch_trampolines); } void mono_trampolines_cleanup (void) { 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); mono_os_mutex_destroy (&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) { gpointer code; guint32 len; if (mono_aot_only) code = mono_aot_create_specific_trampoline (mono_defaults.corlib, arg1, tramp_type, domain, &len); else code = mono_arch_create_specific_trampoline (arg1, tramp_type, domain, &len); mono_lldb_save_specific_trampoline_info (arg1, tramp_type, domain, code, len); if (code_len) *code_len = len; return code; } gpointer mono_create_jump_trampoline (MonoDomain *domain, MonoMethod *method, gboolean add_sync_wrapper, MonoError *error) { MonoJitInfo *ji; gpointer code; guint32 code_size = 0; error_init (error); #ifdef ENABLE_INTERPRETER if (mono_use_interpreter) { gpointer ret = mono_interp_create_trampoline (domain, method, error); if (!mono_error_ok (error)) return NULL; return ret; } #endif 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; if (mono_llvm_only) { code = mono_jit_compile_method (method, error); if (!mono_error_ok (error)) return NULL; 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 = (MonoJitInfo *)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; } static void method_not_found (void) { g_assert_not_reached (); } gpointer mono_create_jit_trampoline (MonoDomain *domain, MonoMethod *method, MonoError *error) { gpointer tramp; error_init (error); if (mono_aot_only) { if (mono_llvm_only && method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) method = mono_marshal_get_synchronized_wrapper (method); /* Avoid creating trampolines if possible */ gpointer code = mono_jit_find_compiled_method (domain, method); if (code) return code; if (mono_llvm_only) { if (method->wrapper_type == MONO_WRAPPER_PROXY_ISINST) /* These wrappers are not generated */ return method_not_found; /* Methods are lazily initialized on first call, so this can't lead recursion */ code = mono_jit_compile_method (method, error); if (!mono_error_ok (error)) return NULL; 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); UnlockedIncrement (&jit_trampolines); mono_domain_unlock (domain); return tramp; } gpointer mono_create_jit_trampoline_from_token (MonoImage *image, guint32 token) { gpointer tramp; MonoDomain *domain = mono_domain_get (); guint8 *buf, *start; buf = start = (guint8 *)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); UnlockedIncrement (&jit_trampolines); return tramp; } /* * mono_create_delegate_trampoline_info: * * Create a trampoline info structure for the KLASS+METHOD pair. */ MonoDelegateTrampInfo* mono_create_delegate_trampoline_info (MonoDomain *domain, MonoClass *klass, MonoMethod *method) { MonoMethod *invoke; MonoError error; MonoDelegateTrampInfo *tramp_info; MonoClassMethodPair pair, *dpair; guint32 code_size = 0; pair.klass = klass; pair.method = method; mono_domain_lock (domain); tramp_info = (MonoDelegateTrampInfo *)g_hash_table_lookup (domain_jit_info (domain)->delegate_trampoline_hash, &pair); mono_domain_unlock (domain); if (tramp_info) return tramp_info; invoke = mono_get_delegate_invoke (klass); g_assert (invoke); tramp_info = (MonoDelegateTrampInfo *)mono_domain_alloc0 (domain, sizeof (MonoDelegateTrampInfo)); tramp_info->invoke = invoke; tramp_info->invoke_sig = mono_method_signature (invoke); tramp_info->impl_this = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), TRUE); tramp_info->impl_nothis = mono_arch_get_delegate_invoke_impl (mono_method_signature (invoke), FALSE); tramp_info->method = method; if (method) { error_init (&error); tramp_info->sig = mono_method_signature_checked (method, &error); tramp_info->need_rgctx_tramp = mono_method_needs_static_rgctx_invoke (method, FALSE); } tramp_info->invoke_impl = mono_create_specific_trampoline (tramp_info, MONO_TRAMPOLINE_DELEGATE, domain, &code_size); g_assert (code_size); dpair = (MonoClassMethodPair *)mono_domain_alloc0 (domain, sizeof (MonoClassMethodPair)); memcpy (dpair, &pair, sizeof (MonoClassMethodPair)); /* store trampoline address */ mono_domain_lock (domain); g_hash_table_insert (domain_jit_info (domain)->delegate_trampoline_hash, dpair, tramp_info); mono_domain_unlock (domain); return tramp_info; } static void no_delegate_trampoline (void) { g_assert_not_reached (); } gpointer mono_create_delegate_trampoline (MonoDomain *domain, MonoClass *klass) { if (mono_llvm_only || mono_use_interpreter) return no_delegate_trampoline; return mono_create_delegate_trampoline_info (domain, klass, NULL)->invoke_impl; } gpointer mono_create_delegate_virtual_trampoline (MonoDomain *domain, MonoClass *klass, MonoMethod *method) { MonoMethod *invoke = mono_get_delegate_invoke (klass); g_assert (invoke); return mono_get_delegate_virtual_invoke_impl (mono_method_signature (invoke), method); } gpointer mono_create_rgctx_lazy_fetch_trampoline (guint32 offset) { 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, NULL); 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)); rgctx_num_lazy_fetch_trampolines ++; mono_trampolines_unlock (); return ptr; } 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", "rgctx_lazy_fetch", "aot", "aot_plt", "delegate", "restore_stack_prot", "generic_virtual_remoting", "vcall" }; /* * mono_get_generic_trampoline_simple_name: * */ const char* mono_get_generic_trampoline_simple_name (MonoTrampolineType tramp_type) { return tramp_names [tramp_type]; } /* * 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); } /* * mini_get_single_step_trampoline: * * Return a trampoline which calls debugger_agent_single_step_from_context (). */ gpointer mini_get_single_step_trampoline (void) { static gpointer trampoline; if (!trampoline) { gpointer tramp; if (mono_aot_only) { tramp = mono_aot_get_trampoline ("sdb_single_step_trampoline"); } else { #ifdef MONO_ARCH_HAVE_SDB_TRAMPOLINES MonoTrampInfo *info; tramp = mono_arch_create_sdb_trampoline (TRUE, &info, FALSE); mono_tramp_info_register (info, NULL); #else tramp = NULL; g_assert_not_reached (); #endif } mono_memory_barrier (); trampoline = tramp; } return trampoline; } /* * mini_get_breakpoint_trampoline: * * Return a trampoline which calls debugger_agent_breakpoint_from_context (). */ gpointer mini_get_breakpoint_trampoline (void) { static gpointer trampoline; if (!trampoline) { gpointer tramp; if (mono_aot_only) { tramp = mono_aot_get_trampoline ("sdb_breakpoint_trampoline"); } else { #ifdef MONO_ARCH_HAVE_SDB_TRAMPOLINES MonoTrampInfo *info; tramp = mono_arch_create_sdb_trampoline (FALSE, &info, FALSE); mono_tramp_info_register (info, NULL); #else tramp = NULL; g_assert_not_reached (); #endif } mono_memory_barrier (); trampoline = tramp; } return trampoline; }