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// Copyright 2015 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_MODULE_DECODER_H_
#define V8_WASM_MODULE_DECODER_H_
#include "src/globals.h"
#include "src/wasm/ast-decoder.h"
#include "src/wasm/wasm-module.h"
#include "src/wasm/wasm-result.h"
namespace v8 {
namespace internal {
namespace wasm {
typedef Result<const WasmModule*> ModuleResult;
typedef Result<WasmFunction*> FunctionResult;
typedef std::vector<std::pair<int, int>> FunctionOffsets;
typedef Result<FunctionOffsets> FunctionOffsetsResult;
typedef std::vector<std::vector<std::pair<int, int>>> AsmJsOffsets;
typedef Result<AsmJsOffsets> AsmJsOffsetsResult;
// Decodes the bytes of a WASM module between {module_start} and {module_end}.
V8_EXPORT_PRIVATE ModuleResult DecodeWasmModule(Isolate* isolate,
const byte* module_start,
const byte* module_end,
bool verify_functions,
ModuleOrigin origin);
// Exposed for testing. Decodes a single function signature, allocating it
// in the given zone. Returns {nullptr} upon failure.
V8_EXPORT_PRIVATE FunctionSig* DecodeWasmSignatureForTesting(Zone* zone,
const byte* start,
const byte* end);
// Decodes the bytes of a WASM function between
// {function_start} and {function_end}.
V8_EXPORT_PRIVATE FunctionResult DecodeWasmFunction(Isolate* isolate,
Zone* zone, ModuleEnv* env,
const byte* function_start,
const byte* function_end);
// Extracts the function offset table from the wasm module bytes.
// Returns a vector with <offset, length> entries, or failure if the wasm bytes
// are detected as invalid. Note that this validation is not complete.
FunctionOffsetsResult DecodeWasmFunctionOffsets(const byte* module_start,
const byte* module_end);
V8_EXPORT_PRIVATE WasmInitExpr DecodeWasmInitExprForTesting(const byte* start,
const byte* end);
// Extracts the mapping from wasm byte offset to asm.js source position per
// function.
// Returns a vector of vectors with <byte_offset, source_position> entries, or
// failure if the wasm bytes are detected as invalid. Note that this validation
// is not complete.
AsmJsOffsetsResult DecodeAsmJsOffsets(const byte* module_start,
const byte* module_end);
} // namespace wasm
} // namespace internal
} // namespace v8
#endif // V8_WASM_MODULE_DECODER_H_
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