| // Copyright 2016 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef V8_WASM_WASM_OBJECTS_H_ |
| #define V8_WASM_WASM_OBJECTS_H_ |
| |
| #include "src/base/bits.h" |
| #include "src/debug/debug.h" |
| #include "src/debug/interface-types.h" |
| #include "src/managed.h" |
| #include "src/objects.h" |
| #include "src/objects/script.h" |
| #include "src/wasm/decoder.h" |
| #include "src/wasm/wasm-interpreter.h" |
| #include "src/wasm/wasm-limits.h" |
| #include "src/wasm/wasm-module.h" |
| |
| #include "src/heap/heap.h" |
| |
| // Has to be the last include (doesn't have include guards) |
| #include "src/objects/object-macros.h" |
| |
| namespace v8 { |
| namespace internal { |
| namespace wasm { |
| class InterpretedFrame; |
| class NativeModule; |
| class WasmCode; |
| struct WasmModule; |
| class SignatureMap; |
| typedef Address GlobalHandleAddress; |
| using ValueType = MachineRepresentation; |
| using FunctionSig = Signature<ValueType>; |
| } // namespace wasm |
| |
| class WasmCompiledModule; |
| class WasmDebugInfo; |
| class WasmInstanceObject; |
| |
| #define DECL_OPTIONAL_ACCESSORS(name, type) \ |
| INLINE(bool has_##name()); \ |
| DECL_ACCESSORS(name, type) |
| |
| // An entry in an indirect dispatch table. |
| struct IndirectFunctionTableEntry { |
| int32_t sig_id = 0; |
| WasmContext* context = nullptr; |
| Address target = nullptr; |
| |
| MOVE_ONLY_WITH_DEFAULT_CONSTRUCTORS(IndirectFunctionTableEntry) |
| }; |
| |
| // Wasm context used to store the mem_size and mem_start address of the linear |
| // memory. These variables can be accessed at C++ level at graph build time |
| // (e.g., initialized during instance building / changed at runtime by |
| // grow_memory). The address of the WasmContext is provided to the wasm entry |
| // functions using a RelocatableIntPtrConstant, then the address is passed as |
| // parameter to the other wasm functions. |
| // Note that generated code can directly read from instances of this struct. |
| struct WasmContext { |
| byte* mem_start = nullptr; |
| uint32_t mem_size = 0; // TODO(titzer): uintptr_t? |
| uint32_t mem_mask = 0; // TODO(titzer): uintptr_t? |
| byte* globals_start = nullptr; |
| // TODO(wasm): pad these entries to a power of two. |
| IndirectFunctionTableEntry* table = nullptr; |
| uint32_t table_size = 0; |
| |
| void SetRawMemory(void* mem_start, size_t mem_size) { |
| DCHECK_LE(mem_size, wasm::kV8MaxWasmMemoryPages * wasm::kWasmPageSize); |
| this->mem_start = static_cast<byte*>(mem_start); |
| this->mem_size = static_cast<uint32_t>(mem_size); |
| this->mem_mask = base::bits::RoundUpToPowerOfTwo32(this->mem_size) - 1; |
| DCHECK_LE(mem_size, this->mem_mask + 1); |
| } |
| |
| ~WasmContext() { |
| if (table) free(table); |
| mem_start = nullptr; |
| mem_size = 0; |
| mem_mask = 0; |
| globals_start = nullptr; |
| table = nullptr; |
| table_size = 0; |
| } |
| }; |
| |
| // Representation of a WebAssembly.Module JavaScript-level object. |
| class WasmModuleObject : public JSObject { |
| public: |
| DECL_CAST(WasmModuleObject) |
| |
| // Shared compiled code between multiple WebAssembly.Module objects. |
| DECL_ACCESSORS(compiled_module, WasmCompiledModule) |
| |
| // Layout description. |
| #define WASM_MODULE_OBJECT_FIELDS(V) \ |
| V(kCompiledModuleOffset, kPointerSize) \ |
| V(kSize, 0) |
| |
| DEFINE_FIELD_OFFSET_CONSTANTS(JSObject::kHeaderSize, |
| WASM_MODULE_OBJECT_FIELDS) |
| #undef WASM_MODULE_OBJECT_FIELDS |
| |
| static Handle<WasmModuleObject> New( |
| Isolate* isolate, Handle<WasmCompiledModule> compiled_module); |
| |
| static void ValidateStateForTesting(Isolate* isolate, |
| Handle<WasmModuleObject> module); |
| }; |
| |
| // Representation of a WebAssembly.Table JavaScript-level object. |
| class WasmTableObject : public JSObject { |
| public: |
| DECL_CAST(WasmTableObject) |
| |
| DECL_ACCESSORS(functions, FixedArray) |
| // TODO(titzer): introduce DECL_I64_ACCESSORS macro |
| DECL_ACCESSORS(maximum_length, Object) |
| DECL_ACCESSORS(dispatch_tables, FixedArray) |
| |
| // Layout description. |
| #define WASM_TABLE_OBJECT_FIELDS(V) \ |
| V(kFunctionsOffset, kPointerSize) \ |
| V(kMaximumLengthOffset, kPointerSize) \ |
| V(kDispatchTablesOffset, kPointerSize) \ |
| V(kSize, 0) |
| |
| DEFINE_FIELD_OFFSET_CONSTANTS(JSObject::kHeaderSize, WASM_TABLE_OBJECT_FIELDS) |
| #undef WASM_TABLE_OBJECT_FIELDS |
| |
| inline uint32_t current_length(); |
| void Grow(Isolate* isolate, uint32_t count); |
| |
| static Handle<WasmTableObject> New(Isolate* isolate, uint32_t initial, |
| int64_t maximum, |
| Handle<FixedArray>* js_functions); |
| static void AddDispatchTable(Isolate* isolate, Handle<WasmTableObject> table, |
| Handle<WasmInstanceObject> instance, |
| int table_index, |
| Handle<FixedArray> function_table); |
| |
| static void Set(Isolate* isolate, Handle<WasmTableObject> table, |
| int32_t index, Handle<JSFunction> function); |
| |
| static void UpdateDispatchTables(Isolate* isolate, |
| Handle<WasmTableObject> table, |
| int table_index, wasm::FunctionSig* sig, |
| Handle<WasmInstanceObject> from_instance, |
| WasmCodeWrapper wasm_code, int func_index); |
| |
| static void ClearDispatchTables(Handle<WasmTableObject> table, int index); |
| }; |
| |
| // Representation of a WebAssembly.Memory JavaScript-level object. |
| class WasmMemoryObject : public JSObject { |
| public: |
| DECL_CAST(WasmMemoryObject) |
| |
| DECL_ACCESSORS(array_buffer, JSArrayBuffer) |
| DECL_INT_ACCESSORS(maximum_pages) |
| DECL_OPTIONAL_ACCESSORS(instances, FixedArrayOfWeakCells) |
| DECL_ACCESSORS(wasm_context, Managed<WasmContext>) |
| |
| // Layout description. |
| #define WASM_MEMORY_OBJECT_FIELDS(V) \ |
| V(kArrayBufferOffset, kPointerSize) \ |
| V(kMaximumPagesOffset, kPointerSize) \ |
| V(kInstancesOffset, kPointerSize) \ |
| V(kWasmContextOffset, kPointerSize) \ |
| V(kSize, 0) |
| |
| DEFINE_FIELD_OFFSET_CONSTANTS(JSObject::kHeaderSize, |
| WASM_MEMORY_OBJECT_FIELDS) |
| #undef WASM_MEMORY_OBJECT_FIELDS |
| |
| // Add an instance to the internal (weak) list. amortized O(n). |
| static void AddInstance(Isolate* isolate, Handle<WasmMemoryObject> memory, |
| Handle<WasmInstanceObject> object); |
| // Remove an instance from the internal (weak) list. O(n). |
| static void RemoveInstance(Isolate* isolate, Handle<WasmMemoryObject> memory, |
| Handle<WasmInstanceObject> object); |
| uint32_t current_pages(); |
| inline bool has_maximum_pages(); |
| |
| V8_EXPORT_PRIVATE static Handle<WasmMemoryObject> New( |
| Isolate* isolate, MaybeHandle<JSArrayBuffer> buffer, int32_t maximum); |
| |
| static int32_t Grow(Isolate*, Handle<WasmMemoryObject>, uint32_t pages); |
| }; |
| |
| // A WebAssembly.Instance JavaScript-level object. |
| class WasmInstanceObject : public JSObject { |
| public: |
| DECL_CAST(WasmInstanceObject) |
| |
| DECL_ACCESSORS(wasm_context, Managed<WasmContext>) |
| DECL_ACCESSORS(compiled_module, WasmCompiledModule) |
| DECL_ACCESSORS(exports_object, JSObject) |
| DECL_OPTIONAL_ACCESSORS(memory_object, WasmMemoryObject) |
| DECL_OPTIONAL_ACCESSORS(globals_buffer, JSArrayBuffer) |
| DECL_OPTIONAL_ACCESSORS(debug_info, WasmDebugInfo) |
| DECL_OPTIONAL_ACCESSORS(table_object, WasmTableObject) |
| DECL_OPTIONAL_ACCESSORS(function_tables, FixedArray) |
| |
| // FixedArray of all instances whose code was imported |
| DECL_ACCESSORS(directly_called_instances, FixedArray) |
| DECL_ACCESSORS(js_imports_table, FixedArray) |
| |
| // Layout description. |
| #define WASM_INSTANCE_OBJECT_FIELDS(V) \ |
| V(kWasmContextOffset, kPointerSize) \ |
| V(kCompiledModuleOffset, kPointerSize) \ |
| V(kExportsObjectOffset, kPointerSize) \ |
| V(kMemoryObjectOffset, kPointerSize) \ |
| V(kGlobalsBufferOffset, kPointerSize) \ |
| V(kDebugInfoOffset, kPointerSize) \ |
| V(kTableObjectOffset, kPointerSize) \ |
| V(kFunctionTablesOffset, kPointerSize) \ |
| V(kDirectlyCalledInstancesOffset, kPointerSize) \ |
| V(kJsImportsTableOffset, kPointerSize) \ |
| V(kSize, 0) |
| |
| DEFINE_FIELD_OFFSET_CONSTANTS(JSObject::kHeaderSize, |
| WASM_INSTANCE_OBJECT_FIELDS) |
| #undef WASM_INSTANCE_OBJECT_FIELDS |
| |
| WasmModuleObject* module_object(); |
| V8_EXPORT_PRIVATE wasm::WasmModule* module(); |
| |
| // Get the debug info associated with the given wasm object. |
| // If no debug info exists yet, it is created automatically. |
| static Handle<WasmDebugInfo> GetOrCreateDebugInfo(Handle<WasmInstanceObject>); |
| |
| static Handle<WasmInstanceObject> New(Isolate*, Handle<WasmCompiledModule>); |
| |
| static int32_t GrowMemory(Isolate*, Handle<WasmInstanceObject>, |
| uint32_t pages); |
| |
| // Assumed to be called with a code object associated to a wasm module |
| // instance. Intended to be called from runtime functions. Returns nullptr on |
| // failing to get owning instance. |
| static WasmInstanceObject* GetOwningInstance(const wasm::WasmCode* code); |
| |
| static void ValidateInstancesChainForTesting( |
| Isolate* isolate, Handle<WasmModuleObject> module_obj, |
| int instance_count); |
| |
| static void ValidateOrphanedInstanceForTesting( |
| Isolate* isolate, Handle<WasmInstanceObject> instance); |
| |
| static void InstallFinalizer(Isolate* isolate, |
| Handle<WasmInstanceObject> instance); |
| }; |
| |
| // A WASM function that is wrapped and exported to JavaScript. |
| class WasmExportedFunction : public JSFunction { |
| public: |
| WasmInstanceObject* instance(); |
| V8_EXPORT_PRIVATE int function_index(); |
| |
| V8_EXPORT_PRIVATE static WasmExportedFunction* cast(Object* object); |
| static bool IsWasmExportedFunction(Object* object); |
| |
| static Handle<WasmExportedFunction> New(Isolate* isolate, |
| Handle<WasmInstanceObject> instance, |
| MaybeHandle<String> maybe_name, |
| int func_index, int arity, |
| Handle<Code> export_wrapper); |
| |
| WasmCodeWrapper GetWasmCode(); |
| }; |
| |
| // Information shared by all WasmCompiledModule objects for the same module. |
| class WasmSharedModuleData : public Struct { |
| public: |
| DECL_ACCESSORS(module_wrapper, Object) |
| wasm::WasmModule* module() const; |
| DECL_ACCESSORS(module_bytes, SeqOneByteString) |
| DECL_ACCESSORS(script, Script) |
| DECL_OPTIONAL_ACCESSORS(asm_js_offset_table, ByteArray) |
| DECL_OPTIONAL_ACCESSORS(breakpoint_infos, FixedArray) |
| inline void reset_breakpoint_infos(); |
| |
| DECL_CAST(WasmSharedModuleData) |
| |
| // Dispatched behavior. |
| DECL_PRINTER(WasmSharedModuleData) |
| DECL_VERIFIER(WasmSharedModuleData) |
| |
| // Layout description. |
| #define WASM_SHARED_MODULE_DATA_FIELDS(V) \ |
| V(kModuleWrapperOffset, kPointerSize) \ |
| V(kModuleBytesOffset, kPointerSize) \ |
| V(kScriptOffset, kPointerSize) \ |
| V(kAsmJsOffsetTableOffset, kPointerSize) \ |
| V(kBreakPointInfosOffset, kPointerSize) \ |
| V(kLazyCompilationOrchestratorOffset, kPointerSize) \ |
| V(kSize, 0) |
| |
| DEFINE_FIELD_OFFSET_CONSTANTS(HeapObject::kHeaderSize, |
| WASM_SHARED_MODULE_DATA_FIELDS) |
| #undef WASM_SHARED_MODULE_DATA_FIELDS |
| |
| // Check whether this module was generated from asm.js source. |
| bool is_asm_js(); |
| |
| static void AddBreakpoint(Handle<WasmSharedModuleData>, int position, |
| Handle<BreakPoint> break_point); |
| |
| static void SetBreakpointsOnNewInstance(Handle<WasmSharedModuleData>, |
| Handle<WasmInstanceObject>); |
| |
| static void PrepareForLazyCompilation(Handle<WasmSharedModuleData>); |
| |
| static Handle<WasmSharedModuleData> New( |
| Isolate* isolate, Handle<Foreign> module_wrapper, |
| Handle<SeqOneByteString> module_bytes, Handle<Script> script, |
| Handle<ByteArray> asm_js_offset_table); |
| |
| // Get the module name, if set. Returns an empty handle otherwise. |
| static MaybeHandle<String> GetModuleNameOrNull(Isolate*, |
| Handle<WasmSharedModuleData>); |
| |
| // Get the function name of the function identified by the given index. |
| // Returns a null handle if the function is unnamed or the name is not a valid |
| // UTF-8 string. |
| static MaybeHandle<String> GetFunctionNameOrNull(Isolate*, |
| Handle<WasmSharedModuleData>, |
| uint32_t func_index); |
| |
| // Get the function name of the function identified by the given index. |
| // Returns "<WASM UNNAMED>" if the function is unnamed or the name is not a |
| // valid UTF-8 string. |
| static Handle<String> GetFunctionName(Isolate*, Handle<WasmSharedModuleData>, |
| uint32_t func_index); |
| |
| // Get the raw bytes of the function name of the function identified by the |
| // given index. |
| // Meant to be used for debugging or frame printing. |
| // Does not allocate, hence gc-safe. |
| Vector<const uint8_t> GetRawFunctionName(uint32_t func_index); |
| |
| // Return the byte offset of the function identified by the given index. |
| // The offset will be relative to the start of the module bytes. |
| // Returns -1 if the function index is invalid. |
| int GetFunctionOffset(uint32_t func_index); |
| |
| // Returns the function containing the given byte offset. |
| // Returns -1 if the byte offset is not contained in any function of this |
| // module. |
| int GetContainingFunction(uint32_t byte_offset); |
| |
| // Translate from byte offset in the module to function number and byte offset |
| // within that function, encoded as line and column in the position info. |
| // Returns true if the position is valid inside this module, false otherwise. |
| bool GetPositionInfo(uint32_t position, Script::PositionInfo* info); |
| |
| // Get the source position from a given function index and byte offset, |
| // for either asm.js or pure WASM modules. |
| static int GetSourcePosition(Handle<WasmSharedModuleData>, |
| uint32_t func_index, uint32_t byte_offset, |
| bool is_at_number_conversion); |
| |
| // Compute the disassembly of a wasm function. |
| // Returns the disassembly string and a list of <byte_offset, line, column> |
| // entries, mapping wasm byte offsets to line and column in the disassembly. |
| // The list is guaranteed to be ordered by the byte_offset. |
| // Returns an empty string and empty vector if the function index is invalid. |
| debug::WasmDisassembly DisassembleFunction(int func_index); |
| |
| // Extract a portion of the wire bytes as UTF-8 string. |
| // Returns a null handle if the respective bytes do not form a valid UTF-8 |
| // string. |
| static MaybeHandle<String> ExtractUtf8StringFromModuleBytes( |
| Isolate* isolate, Handle<WasmSharedModuleData>, wasm::WireBytesRef ref); |
| static MaybeHandle<String> ExtractUtf8StringFromModuleBytes( |
| Isolate* isolate, Handle<SeqOneByteString> module_bytes, |
| wasm::WireBytesRef ref); |
| |
| // Get a list of all possible breakpoints within a given range of this module. |
| bool GetPossibleBreakpoints(const debug::Location& start, |
| const debug::Location& end, |
| std::vector<debug::BreakLocation>* locations); |
| |
| // Return an empty handle if no breakpoint is hit at that location, or a |
| // FixedArray with all hit breakpoint objects. |
| static MaybeHandle<FixedArray> CheckBreakPoints(Isolate*, |
| Handle<WasmSharedModuleData>, |
| int position); |
| |
| DECL_OPTIONAL_ACCESSORS(lazy_compilation_orchestrator, Foreign) |
| }; |
| |
| // This represents the set of wasm compiled functions, together |
| // with all the information necessary for re-specializing them. |
| // |
| // We specialize wasm functions to their instance by embedding: |
| // - raw pointer to the wasm_context, that contains the size of the |
| // memory and the pointer to the backing store of the array buffer |
| // used as memory of a particular WebAssembly.Instance object. This |
| // information are then used at runtime to access memory / verify bounds |
| // check limits. |
| // - the objects representing the function tables and signature tables |
| // |
| // Even without instantiating, we need values for all of these parameters. |
| // We need to track these values to be able to create new instances and |
| // to be able to serialize/deserialize. |
| // The design decisions for how we track these values is not too immediate, |
| // and it deserves a summary. The "tricky" ones are: memory, globals, and |
| // the tables (signature and functions). |
| // For tables, we need to hold a reference to the JS Heap object, because |
| // we embed them as objects, and they may move. |
| class WasmCompiledModule : public Struct { |
| public: |
| DECL_CAST(WasmCompiledModule) |
| |
| // Dispatched behavior. |
| DECL_PRINTER(WasmCompiledModule) |
| DECL_VERIFIER(WasmCompiledModule) |
| |
| // Layout description. |
| #define WASM_COMPILED_MODULE_FIELDS(V) \ |
| V(kSharedOffset, kPointerSize) \ |
| V(kNativeContextOffset, kPointerSize) \ |
| V(kExportWrappersOffset, kPointerSize) \ |
| V(kWeakExportedFunctionsOffset, kPointerSize) \ |
| V(kNextInstanceOffset, kPointerSize) \ |
| V(kPrevInstanceOffset, kPointerSize) \ |
| V(kOwningInstanceOffset, kPointerSize) \ |
| V(kWasmModuleOffset, kPointerSize) \ |
| V(kSourcePositionsOffset, kPointerSize) \ |
| V(kNativeModuleOffset, kPointerSize) \ |
| V(kLazyCompileDataOffset, kPointerSize) \ |
| V(kUseTrapHandlerOffset, kPointerSize) \ |
| V(kFunctionTablesOffset, kPointerSize) \ |
| V(kEmptyFunctionTablesOffset, kPointerSize) \ |
| V(kSize, 0) |
| |
| DEFINE_FIELD_OFFSET_CONSTANTS(HeapObject::kHeaderSize, |
| WASM_COMPILED_MODULE_FIELDS) |
| #undef WASM_COMPILED_MODULE_FIELDS |
| |
| #define WCM_OBJECT_OR_WEAK(TYPE, NAME, SETTER_MODIFIER) \ |
| public: \ |
| inline TYPE* NAME() const; \ |
| inline bool has_##NAME() const; \ |
| inline void reset_##NAME(); \ |
| \ |
| SETTER_MODIFIER: \ |
| inline void set_##NAME(TYPE* value, \ |
| WriteBarrierMode mode = UPDATE_WRITE_BARRIER); |
| |
| #define WCM_OBJECT(TYPE, NAME) WCM_OBJECT_OR_WEAK(TYPE, NAME, public) |
| |
| #define WCM_CONST_OBJECT(TYPE, NAME) WCM_OBJECT_OR_WEAK(TYPE, NAME, private) |
| |
| #define WCM_SMALL_CONST_NUMBER(TYPE, NAME) \ |
| public: \ |
| inline TYPE NAME() const; \ |
| \ |
| private: \ |
| inline void set_##NAME(TYPE value); |
| |
| #define WCM_WEAK_LINK(TYPE, NAME) \ |
| WCM_OBJECT_OR_WEAK(WeakCell, weak_##NAME, public) \ |
| \ |
| public: \ |
| inline TYPE* NAME() const; |
| |
| // Add values here if they are required for creating new instances or |
| // for deserialization, and if they are serializable. |
| // By default, instance values go to WasmInstanceObject, however, if |
| // we embed the generated code with a value, then we track that value here. |
| WCM_CONST_OBJECT(WasmSharedModuleData, shared) |
| WCM_WEAK_LINK(Context, native_context) |
| WCM_CONST_OBJECT(FixedArray, export_wrappers) |
| WCM_OBJECT(FixedArray, weak_exported_functions) |
| WCM_CONST_OBJECT(WasmCompiledModule, next_instance) |
| WCM_CONST_OBJECT(WasmCompiledModule, prev_instance) |
| WCM_WEAK_LINK(WasmInstanceObject, owning_instance) |
| WCM_WEAK_LINK(WasmModuleObject, wasm_module) |
| WCM_OBJECT(FixedArray, source_positions) |
| WCM_OBJECT(Foreign, native_module) |
| WCM_OBJECT(FixedArray, lazy_compile_data) |
| // TODO(mstarzinger): Make {use_trap_handler} smaller. |
| WCM_SMALL_CONST_NUMBER(bool, use_trap_handler) |
| WCM_OBJECT(FixedArray, function_tables) |
| WCM_CONST_OBJECT(FixedArray, empty_function_tables) |
| |
| public: |
| static Handle<WasmCompiledModule> New( |
| Isolate* isolate, wasm::WasmModule* module, |
| Handle<FixedArray> export_wrappers, |
| const std::vector<wasm::GlobalHandleAddress>& function_tables, |
| bool use_trap_hander); |
| |
| static Handle<WasmCompiledModule> Clone(Isolate* isolate, |
| Handle<WasmCompiledModule> module); |
| static void Reset(Isolate* isolate, WasmCompiledModule* module); |
| |
| wasm::NativeModule* GetNativeModule() const; |
| void InsertInChain(WasmModuleObject*); |
| void RemoveFromChain(); |
| void OnWasmModuleDecodingComplete(Handle<WasmSharedModuleData>); |
| |
| DECL_ACCESSORS(raw_next_instance, Object); |
| DECL_ACCESSORS(raw_prev_instance, Object); |
| |
| void PrintInstancesChain(); |
| |
| static void ReinitializeAfterDeserialization(Isolate*, |
| Handle<WasmCompiledModule>); |
| |
| // Set a breakpoint on the given byte position inside the given module. |
| // This will affect all live and future instances of the module. |
| // The passed position might be modified to point to the next breakable |
| // location inside the same function. |
| // If it points outside a function, or behind the last breakable location, |
| // this function returns false and does not set any breakpoint. |
| static bool SetBreakPoint(Handle<WasmCompiledModule>, int* position, |
| Handle<BreakPoint> break_point); |
| |
| // TODO(mstarzinger): following 4 unnecessary after we're done with |
| // FLAG_wasm_jit_to_native |
| static void SetTableValue(Isolate* isolate, Handle<FixedArray> table, |
| int index, Address value); |
| static void UpdateTableValue(FixedArray* table, int index, Address value); |
| static Address GetTableValue(FixedArray* table, int index); |
| |
| void LogWasmCodes(Isolate* isolate); |
| |
| private: |
| DISALLOW_IMPLICIT_CONSTRUCTORS(WasmCompiledModule); |
| }; |
| |
| class WasmDebugInfo : public Struct { |
| public: |
| DECL_ACCESSORS(wasm_instance, WasmInstanceObject) |
| DECL_ACCESSORS(interpreter_handle, Object); |
| DECL_ACCESSORS(interpreted_functions, Object); |
| DECL_OPTIONAL_ACCESSORS(locals_names, FixedArray) |
| DECL_OPTIONAL_ACCESSORS(c_wasm_entries, FixedArray) |
| DECL_OPTIONAL_ACCESSORS(c_wasm_entry_map, Managed<wasm::SignatureMap>) |
| |
| DECL_CAST(WasmDebugInfo) |
| |
| // Dispatched behavior. |
| DECL_PRINTER(WasmDebugInfo) |
| DECL_VERIFIER(WasmDebugInfo) |
| |
| // Layout description. |
| #define WASM_DEBUG_INFO_FIELDS(V) \ |
| V(kInstanceOffset, kPointerSize) \ |
| V(kInterpreterHandleOffset, kPointerSize) \ |
| V(kInterpretedFunctionsOffset, kPointerSize) \ |
| V(kLocalsNamesOffset, kPointerSize) \ |
| V(kCWasmEntriesOffset, kPointerSize) \ |
| V(kCWasmEntryMapOffset, kPointerSize) \ |
| V(kSize, 0) |
| |
| DEFINE_FIELD_OFFSET_CONSTANTS(HeapObject::kHeaderSize, WASM_DEBUG_INFO_FIELDS) |
| #undef WASM_DEBUG_INFO_FIELDS |
| |
| static Handle<WasmDebugInfo> New(Handle<WasmInstanceObject>); |
| |
| // Setup a WasmDebugInfo with an existing WasmInstance struct. |
| // Returns a pointer to the interpreter instantiated inside this |
| // WasmDebugInfo. |
| // Use for testing only. |
| V8_EXPORT_PRIVATE static wasm::WasmInterpreter* SetupForTesting( |
| Handle<WasmInstanceObject>); |
| |
| // Set a breakpoint in the given function at the given byte offset within that |
| // function. This will redirect all future calls to this function to the |
| // interpreter and will always pause at the given offset. |
| static void SetBreakpoint(Handle<WasmDebugInfo>, int func_index, int offset); |
| |
| // Make a set of functions always execute in the interpreter without setting |
| // breakpoints. |
| static void RedirectToInterpreter(Handle<WasmDebugInfo>, |
| Vector<int> func_indexes); |
| |
| void PrepareStep(StepAction); |
| |
| // Execute the specified function in the interpreter. Read arguments from |
| // arg_buffer. |
| // The frame_pointer will be used to identify the new activation of the |
| // interpreter for unwinding and frame inspection. |
| // Returns true if exited regularly, false if a trap occurred. In the latter |
| // case, a pending exception will have been set on the isolate. |
| bool RunInterpreter(Address frame_pointer, int func_index, |
| uint8_t* arg_buffer); |
| |
| // Get the stack of the wasm interpreter as pairs of <function index, byte |
| // offset>. The list is ordered bottom-to-top, i.e. caller before callee. |
| std::vector<std::pair<uint32_t, int>> GetInterpretedStack( |
| Address frame_pointer); |
| |
| wasm::WasmInterpreter::FramePtr GetInterpretedFrame(Address frame_pointer, |
| int frame_index); |
| |
| // Unwind the interpreted stack belonging to the passed interpreter entry |
| // frame. |
| void Unwind(Address frame_pointer); |
| |
| // Returns the number of calls / function frames executed in the interpreter. |
| uint64_t NumInterpretedCalls(); |
| |
| // Get scope details for a specific interpreted frame. |
| // This returns a JSArray of length two: One entry for the global scope, one |
| // for the local scope. Both elements are JSArrays of size |
| // ScopeIterator::kScopeDetailsSize and layout as described in debug-scopes.h. |
| // The global scope contains information about globals and the memory. |
| // The local scope contains information about parameters, locals, and stack |
| // values. |
| static Handle<JSObject> GetScopeDetails(Handle<WasmDebugInfo>, |
| Address frame_pointer, |
| int frame_index); |
| static Handle<JSObject> GetGlobalScopeObject(Handle<WasmDebugInfo>, |
| Address frame_pointer, |
| int frame_index); |
| static Handle<JSObject> GetLocalScopeObject(Handle<WasmDebugInfo>, |
| Address frame_pointer, |
| int frame_index); |
| |
| static Handle<JSFunction> GetCWasmEntry(Handle<WasmDebugInfo>, |
| wasm::FunctionSig*); |
| }; |
| |
| // Attach function information in the form of deoptimization data to the given |
| // code object. This information will be used for generating stack traces, |
| // calling imported functions in the interpreter, knowing which function to |
| // compile in a lazy compile stub, and more. The deopt data will be a newly |
| // allocated FixedArray of length 2, where the first element is a WeakCell |
| // containing the WasmInstanceObject, and the second element is the function |
| // index. |
| // If calling this method repeatedly for the same instance, pass a WeakCell |
| // directly in order to avoid creating many cells pointing to the same instance. |
| void AttachWasmFunctionInfo(Isolate*, Handle<Code>, |
| MaybeHandle<WeakCell> weak_instance, |
| int func_index); |
| void AttachWasmFunctionInfo(Isolate*, Handle<Code>, |
| MaybeHandle<WasmInstanceObject>, int func_index); |
| |
| struct WasmFunctionInfo { |
| MaybeHandle<WasmInstanceObject> instance; |
| int func_index; |
| }; |
| WasmFunctionInfo GetWasmFunctionInfo(Isolate*, Handle<Code>); |
| |
| #undef DECL_OPTIONAL_ACCESSORS |
| #undef WCM_CONST_OBJECT |
| #undef WCM_LARGE_NUMBER |
| #undef WCM_OBJECT |
| #undef WCM_OBJECT_OR_WEAK |
| #undef WCM_SMALL_CONST_NUMBER |
| #undef WCM_WEAK_LINK |
| |
| #include "src/objects/object-macros-undef.h" |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_WASM_WASM_OBJECTS_H_ |