llvm-capstone/lld/wasm/WriterUtils.h
Thomas Lively 09768c5d7a [WebAssembly] Initialize memory in start function
Summary:
 - `__wasm_init_memory` is now the WebAssembly start function instead
   of being called from `__wasm_call_ctors` or called directly by the
   runtime.
 - Adds a new synthetic data symbol `__wasm_init_memory_flag` that is
   atomically incremented from zero to one by the thread responsible
   for initializing memory.
 - All threads now unconditionally perform data.drop on all passive
   segments.
 - Removes --passive-segments and --active-segments flags and controls
   segment type based on --shared-memory instead. The deleted flags
   were only present to ameliorate the upgrade path in Emscripten.

Reviewers: sbc100, aheejin

Subscribers: dschuff, jgravelle-google, sunfish, jfb, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D65783

llvm-svn: 370965
2019-09-04 19:50:39 +00:00

73 lines
2.4 KiB
C++

//===- WriterUtils.h --------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLD_WASM_WRITERUTILS_H
#define LLD_WASM_WRITERUTILS_H
#include "lld/Common/LLVM.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Object/Wasm.h"
namespace lld {
namespace wasm {
void debugWrite(uint64_t offset, const Twine &msg);
void writeUleb128(raw_ostream &os, uint32_t number, const Twine &msg);
void writeSleb128(raw_ostream &os, int32_t number, const Twine &msg);
void writeBytes(raw_ostream &os, const char *bytes, size_t count,
const Twine &msg);
void writeStr(raw_ostream &os, StringRef string, const Twine &msg);
void writeU8(raw_ostream &os, uint8_t byte, const Twine &msg);
void writeU32(raw_ostream &os, uint32_t number, const Twine &msg);
void writeValueType(raw_ostream &os, llvm::wasm::ValType type,
const Twine &msg);
void writeSig(raw_ostream &os, const llvm::wasm::WasmSignature &sig);
void writeI32Const(raw_ostream &os, int32_t number, const Twine &msg);
void writeI64Const(raw_ostream &os, int32_t number, const Twine &msg);
void writeMemArg(raw_ostream &os, uint32_t alignment, uint32_t offset);
void writeInitExpr(raw_ostream &os, const llvm::wasm::WasmInitExpr &initExpr);
void writeLimits(raw_ostream &os, const llvm::wasm::WasmLimits &limits);
void writeGlobalType(raw_ostream &os, const llvm::wasm::WasmGlobalType &type);
void writeGlobal(raw_ostream &os, const llvm::wasm::WasmGlobal &global);
void writeEventType(raw_ostream &os, const llvm::wasm::WasmEventType &type);
void writeEvent(raw_ostream &os, const llvm::wasm::WasmEvent &event);
void writeTableType(raw_ostream &os, const llvm::wasm::WasmTable &type);
void writeImport(raw_ostream &os, const llvm::wasm::WasmImport &import);
void writeExport(raw_ostream &os, const llvm::wasm::WasmExport &export_);
} // namespace wasm
std::string toString(llvm::wasm::ValType type);
std::string toString(const llvm::wasm::WasmSignature &sig);
std::string toString(const llvm::wasm::WasmGlobalType &type);
std::string toString(const llvm::wasm::WasmEventType &type);
} // namespace lld
#endif // LLD_WASM_WRITERUTILS_H