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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
*
* Copyright 2017 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef wasm_process_h
#define wasm_process_h
#include "mozilla/Atomics.h"
#include "wasm/WasmMemory.h"
namespace js {
namespace wasm {
class Code;
class CodeRange;
class CodeSegment;
// These methods return the wasm::CodeSegment (resp. wasm::Code) containing
// the given pc, if any exist in the process. These methods do not take a lock,
// and thus are safe to use in a profiling context.
const CodeSegment* LookupCodeSegment(const void* pc,
const CodeRange** codeRange = nullptr);
const Code* LookupCode(const void* pc, const CodeRange** codeRange = nullptr);
// Return whether the given PC is in any type of wasm code (module or builtin).
bool InCompiledCode(void* pc);
// A bool member that can be used as a very fast lookup to know if there is any
// code segment at all.
extern mozilla::Atomic<bool> CodeExists;
// These methods allow to (un)register CodeSegments so they can be looked up
// via pc in the methods described above.
bool RegisterCodeSegment(const CodeSegment* cs);
void UnregisterCodeSegment(const CodeSegment* cs);
// Whether this process is configured to use huge memory or not. Note that this
// is not precise enough to tell whether a particular memory uses huge memory,
// there are additional conditions for that.
bool IsHugeMemoryEnabled(IndexType t);
[[nodiscard]] bool DisableHugeMemory();
// Called once before/after the last VM execution which could execute or compile
// wasm.
bool Init();
void ShutDown();
} // namespace wasm
} // namespace js
#endif // wasm_process_h
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