Source code

Revision control

Copy as Markdown

Other Tools

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at */
#ifndef jit_TrampolineNatives_h
#define jit_TrampolineNatives_h
#include <stdint.h>
#include "js/TypeDecls.h"
// [SMDOC] Trampoline Natives
// Trampoline natives are JS builtin functions that use the NATIVE_JIT_ENTRY
// mechanism. This means they have two implementations: the usual native C++
// implementation and a generated JIT trampoline that JIT callers can call
// directly using the JIT ABI calling convention. (This is very similar to how
// calls from JS to WebAssembly are optimized in the JITs.)
// The JIT trampoline lets us implement some natives in a more efficient way. In
// particular, it's much faster to call (other) JS functions with JIT code from
// a JIT trampoline than from C++ code.
// Trampoline frames use FrameType::TrampolineNative.
class JSJitInfo;
namespace JS {
class CallArgs;
} // namespace JS
// List of all trampoline natives.
_(ArraySort) \
namespace js {
namespace jit {
enum class TrampolineNative : uint16_t {
#define ADD_NATIVE(native) native,
#define ADD_NATIVE(native) extern const JSJitInfo JitInfo_##native;
void SetTrampolineNativeJitEntry(JSContext* cx, JSFunction* fun,
TrampolineNative native);
bool CallTrampolineNativeJitCode(JSContext* cx, TrampolineNative native,
JS::CallArgs& args);
} // namespace jit
} // namespace js
#endif /* jit_TrampolineNatives_h */