diff options
Diffstat (limited to 'chromium/v8/src/compiler/wasm-compiler.h')
| -rw-r--r-- | chromium/v8/src/compiler/wasm-compiler.h | 121 |
1 files changed, 90 insertions, 31 deletions
diff --git a/chromium/v8/src/compiler/wasm-compiler.h b/chromium/v8/src/compiler/wasm-compiler.h index 146f3044ca8..22a2e1071e7 100644 --- a/chromium/v8/src/compiler/wasm-compiler.h +++ b/chromium/v8/src/compiler/wasm-compiler.h @@ -43,25 +43,34 @@ class WasmCode; namespace compiler { +// Indirect function tables contain a <smi(sig), code> pair for each entry. +enum FunctionTableEntries : int { + kFunctionTableSignatureOffset = 0, + kFunctionTableCodeOffset = 1, + kFunctionTableEntrySize = 2 +}; +constexpr inline int FunctionTableSigOffset(int i) { + return kFunctionTableEntrySize * i + kFunctionTableSignatureOffset; +} +constexpr inline int FunctionTableCodeOffset(int i) { + return kFunctionTableEntrySize * i + kFunctionTableCodeOffset; +} + // The {ModuleEnv} encapsulates the module data that is used by the // {WasmGraphBuilder} during graph building. It represents the parameters to // which the compiled code should be specialized, including which code to call // for direct calls {function_code}, which tables to use for indirect calls // {function_tables}, memory start address and size {mem_start, mem_size}, -// as well as signature maps {signature_maps} and the module itself {module}. +// as well as the module itself {module}. // ModuleEnvs are shareable across multiple compilations. struct ModuleEnv { // A pointer to the decoded module's static representation. const wasm::WasmModule* module; - // The function tables are FixedArrays of code used to dispatch indirect - // calls. (the same length as module.function_tables). We use the address - // to a global handle to the FixedArray. + // The function tables are FixedArrays of <smi, code> pairs used to signature + // check and dispatch indirect calls. It has the same length as + // module.function_tables. We use the address to a global handle to the + // FixedArray. const std::vector<Address> function_tables; - // The signatures tables are FixedArrays of SMIs used to check signatures - // match at runtime. - // (the same length as module.function_tables) - // We use the address to a global handle to the FixedArray. - const std::vector<Address> signature_tables; // TODO(mtrofin): remove these 2 once we don't need FLAG_wasm_jit_to_native // Contains the code objects to call for each direct call. @@ -69,6 +78,25 @@ struct ModuleEnv { const std::vector<Handle<Code>> function_code; // If the default code is not a null handle, always use it for direct calls. const Handle<Code> default_function_code; + // True if trap handling should be used in compiled code, rather than + // compiling in bounds checks for each memory access. + const bool use_trap_handler; + + ModuleEnv(const wasm::WasmModule* module, Handle<Code> default_function_code, + bool use_trap_handler) + : module(module), + default_function_code(default_function_code), + use_trap_handler(use_trap_handler) {} + + ModuleEnv(const wasm::WasmModule* module, + std::vector<Address> function_tables, + std::vector<Handle<Code>> function_code, + Handle<Code> default_function_code, bool use_trap_handler) + : module(module), + function_tables(std::move(function_tables)), + function_code(std::move(function_code)), + default_function_code(default_function_code), + use_trap_handler(use_trap_handler) {} }; enum RuntimeExceptionSupport : bool { @@ -114,6 +142,11 @@ class WasmCompilationUnit final { struct LiftoffData { wasm::LiftoffAssembler asm_; + int safepoint_table_offset_; + SourcePositionTableBuilder source_position_table_builder_; + // The {codegen_zone_} needs to survive until FinishCompilation. It's only + // rarely used (e.g. for runtime calls), so it's only allocated when needed. + std::unique_ptr<Zone> codegen_zone_; explicit LiftoffData(Isolate* isolate) : asm_(isolate) {} }; struct TurbofanData { @@ -151,7 +184,7 @@ class WasmCompilationUnit final { size_t memory_cost_ = 0; wasm::NativeModule* native_module_; bool lower_simd_; - std::shared_ptr<std::vector<trap_handler::ProtectedInstructionData>> + std::unique_ptr<std::vector<trap_handler::ProtectedInstructionData>> protected_instructions_; CompilationMode mode_; // {liftoff_} is valid if mode_ == kLiftoff, tf_ if mode_ == kTurbofan. @@ -172,12 +205,13 @@ class WasmCompilationUnit final { Handle<Code> CompileWasmToJSWrapper(Isolate* isolate, Handle<JSReceiver> target, wasm::FunctionSig* sig, uint32_t index, wasm::ModuleOrigin origin, + bool use_trap_handler, Handle<FixedArray> global_js_imports_table); // Wraps a given wasm code object, producing a code object. V8_EXPORT_PRIVATE Handle<Code> CompileJSToWasmWrapper( Isolate* isolate, wasm::WasmModule* module, WasmCodeWrapper wasm_code, - uint32_t index, Address wasm_context_address); + uint32_t index, Address wasm_context_address, bool use_trap_handler); // Wraps a wasm function, producing a code object that can be called from other // wasm instances (the WasmContext address must be changed). @@ -221,6 +255,8 @@ typedef ZoneVector<Node*> NodeVector; class WasmGraphBuilder { public: enum EnforceBoundsCheck : bool { kNeedsBoundsCheck, kCanOmitBoundsCheck }; + struct IntConvertOps; + struct FloatConvertOps; WasmGraphBuilder(ModuleEnv* env, Zone* zone, JSGraph* graph, Handle<Code> centry_stub, wasm::FunctionSig* sig, @@ -351,7 +387,7 @@ class WasmGraphBuilder { Node* LoadMem(wasm::ValueType type, MachineType memtype, Node* index, uint32_t offset, uint32_t alignment, wasm::WasmCodePosition position); - Node* StoreMem(MachineType memtype, Node* index, uint32_t offset, + Node* StoreMem(MachineRepresentation mem_rep, Node* index, uint32_t offset, uint32_t alignment, Node* val, wasm::WasmCodePosition position, wasm::ValueType type); static void PrintDebugName(Node* node); @@ -413,36 +449,43 @@ class WasmGraphBuilder { const wasm::WasmModule* module() { return env_ ? env_->module : nullptr; } + bool use_trap_handler() const { return env_ && env_->use_trap_handler; } + private: + enum class NumericImplementation : uint8_t { kTrap, kSaturate }; static const int kDefaultBufferSize = 16; - Zone* zone_; - JSGraph* jsgraph_; - Node* centry_stub_node_; - ModuleEnv* env_ = nullptr; - Node* wasm_context_ = nullptr; - NodeVector signature_tables_; - NodeVector function_tables_; - NodeVector function_table_sizes_; + Zone* const zone_; + JSGraph* const jsgraph_; + Node* const centry_stub_node_; + // env_ == nullptr means we're not compiling Wasm functions, such as for + // wrappers or interpreter stubs. + ModuleEnv* const env_ = nullptr; + SetOncePointer<Node> wasm_context_; + struct FunctionTableNodes { + Node* table_addr; + Node* size; + }; + ZoneVector<FunctionTableNodes> function_tables_; Node** control_ = nullptr; Node** effect_ = nullptr; WasmContextCacheNodes* context_cache_ = nullptr; - Node* globals_start_ = nullptr; + SetOncePointer<Node> globals_start_; Node** cur_buffer_; size_t cur_bufsize_; Node* def_buffer_[kDefaultBufferSize]; bool has_simd_ = false; bool needs_stack_check_ = false; - bool untrusted_code_mitigations_ = true; + const bool untrusted_code_mitigations_ = true; // If the runtime doesn't support exception propagation, // we won't generate stack checks, and trap handling will also // be generated differently. - RuntimeExceptionSupport runtime_exception_support_; + const RuntimeExceptionSupport runtime_exception_support_; - wasm::FunctionSig* sig_; + wasm::FunctionSig* const sig_; SetOncePointer<const Operator> allocate_heap_number_operator_; - compiler::SourcePositionTable* source_position_table_ = nullptr; + compiler::SourcePositionTable* const source_position_table_ = nullptr; // Internal helper methods. JSGraph* jsgraph() { return jsgraph_; } @@ -451,11 +494,12 @@ class WasmGraphBuilder { Node* String(const char* string); Node* MemBuffer(uint32_t offset); // BoundsCheckMem receives a uint32 {index} node and returns a ptrsize index. - Node* BoundsCheckMem(MachineType memtype, Node* index, uint32_t offset, + Node* BoundsCheckMem(uint8_t access_size, Node* index, uint32_t offset, wasm::WasmCodePosition, EnforceBoundsCheck); + Node* Uint32ToUintptr(Node*); const Operator* GetSafeLoadOperator(int offset, wasm::ValueType type); const Operator* GetSafeStoreOperator(int offset, wasm::ValueType type); - Node* BuildChangeEndiannessStore(Node* node, MachineType type, + Node* BuildChangeEndiannessStore(Node* node, MachineRepresentation rep, wasm::ValueType wasmtype = wasm::kWasmStmt); Node* BuildChangeEndiannessLoad(Node* node, MachineType type, wasm::ValueType wasmtype = wasm::kWasmStmt); @@ -470,10 +514,25 @@ class WasmGraphBuilder { Node* BuildF32CopySign(Node* left, Node* right); Node* BuildF64CopySign(Node* left, Node* right); - Node* BuildI32SConvertF32(Node* input, wasm::WasmCodePosition position); - Node* BuildI32SConvertF64(Node* input, wasm::WasmCodePosition position); - Node* BuildI32UConvertF32(Node* input, wasm::WasmCodePosition position); - Node* BuildI32UConvertF64(Node* input, wasm::WasmCodePosition position); + + Node* BuildI32ConvertOp(Node* input, wasm::WasmCodePosition position, + NumericImplementation impl, const Operator* op, + wasm::WasmOpcode check_op, + const IntConvertOps* int_ops, + const FloatConvertOps* float_ops); + Node* BuildConvertCheck(Node* test, Node* result, Node* input, + wasm::WasmCodePosition position, + NumericImplementation impl, + const IntConvertOps* int_ops, + const FloatConvertOps* float_ops); + Node* BuildI32SConvertF32(Node* input, wasm::WasmCodePosition position, + NumericImplementation impl); + Node* BuildI32SConvertF64(Node* input, wasm::WasmCodePosition position, + NumericImplementation impl); + Node* BuildI32UConvertF32(Node* input, wasm::WasmCodePosition position, + NumericImplementation impl); + Node* BuildI32UConvertF64(Node* input, wasm::WasmCodePosition position, + NumericImplementation impl); Node* BuildI32Ctz(Node* input); Node* BuildI32Popcnt(Node* input); Node* BuildI64Ctz(Node* input); |