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JSScript-inl.h
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JSScript-inl.h
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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:
* 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 http://mozilla.org/MPL/2.0/. */
#ifndef vm_JSScript_inl_h
#define vm_JSScript_inl_h
#include "vm/JSScript.h"
#include <utility>
#include "jit/BaselineJIT.h"
#include "jit/IonAnalysis.h"
#include "vm/EnvironmentObject.h"
#include "vm/RegExpObject.h"
#include "wasm/AsmJS.h"
#include "vm/Realm-inl.h"
#include "vm/Shape-inl.h"
namespace js {
ScriptCounts::ScriptCounts()
: pcCounts_(), throwCounts_(), ionCounts_(nullptr) {}
ScriptCounts::ScriptCounts(PCCountsVector&& jumpTargets)
: pcCounts_(std::move(jumpTargets)), throwCounts_(), ionCounts_(nullptr) {}
ScriptCounts::ScriptCounts(ScriptCounts&& src)
: pcCounts_(std::move(src.pcCounts_)),
throwCounts_(std::move(src.throwCounts_)),
ionCounts_(std::move(src.ionCounts_)) {
src.ionCounts_ = nullptr;
}
ScriptCounts& ScriptCounts::operator=(ScriptCounts&& src) {
pcCounts_ = std::move(src.pcCounts_);
throwCounts_ = std::move(src.throwCounts_);
ionCounts_ = std::move(src.ionCounts_);
src.ionCounts_ = nullptr;
return *this;
}
ScriptCounts::~ScriptCounts() { js_delete(ionCounts_); }
ScriptAndCounts::ScriptAndCounts(JSScript* script)
: script(script), scriptCounts() {
script->releaseScriptCounts(&scriptCounts);
}
ScriptAndCounts::ScriptAndCounts(ScriptAndCounts&& sac)
: script(std::move(sac.script)),
scriptCounts(std::move(sac.scriptCounts)) {}
void SetFrameArgumentsObject(JSContext* cx, AbstractFramePtr frame,
HandleScript script, JSObject* argsobj);
/* static */ inline JSFunction* LazyScript::functionDelazifying(
JSContext* cx, Handle<LazyScript*> script) {
RootedFunction fun(cx, script->function_);
if (script->function_ && !JSFunction::getOrCreateScript(cx, fun)) {
return nullptr;
}
return script->function_;
}
} // namespace js
inline JSFunction* JSScript::functionDelazifying() const {
JSFunction* fun = function();
if (fun && fun->isInterpretedLazy()) {
fun->setUnlazifiedScript(const_cast<JSScript*>(this));
// If this script has a LazyScript, make sure the LazyScript has a
// reference to the script when delazifying its canonical function.
if (lazyScript && !lazyScript->maybeScript()) {
lazyScript->initScript(const_cast<JSScript*>(this));
}
}
return fun;
}
inline void JSScript::ensureNonLazyCanonicalFunction() {
// Infallibly delazify the canonical script.
JSFunction* fun = function();
if (fun && fun->isInterpretedLazy()) {
functionDelazifying();
}
}
inline JSFunction* JSScript::getFunction(size_t index) {
JSObject* obj = getObject(index);
MOZ_RELEASE_ASSERT(obj->is<JSFunction>(), "Script object is not JSFunction");
JSFunction* fun = &obj->as<JSFunction>();
MOZ_ASSERT_IF(fun->isNative(), IsAsmJSModuleNative(fun->native()));
return fun;
}
inline JSFunction* JSScript::getFunction(jsbytecode* pc) {
return getFunction(GET_UINT32_INDEX(pc));
}
inline js::RegExpObject* JSScript::getRegExp(size_t index) {
JSObject* obj = getObject(index);
MOZ_RELEASE_ASSERT(obj->is<js::RegExpObject>(),
"Script object is not RegExpObject");
return &obj->as<js::RegExpObject>();
}
inline js::RegExpObject* JSScript::getRegExp(jsbytecode* pc) {
JSObject* obj = getObject(pc);
MOZ_RELEASE_ASSERT(obj->is<js::RegExpObject>(),
"Script object is not RegExpObject");
return &obj->as<js::RegExpObject>();
}
inline js::GlobalObject& JSScript::global() const {
/*
* A JSScript always marks its realm's global (via bindings) so we can
* assert that maybeGlobal is non-null here.
*/
return *realm()->maybeGlobal();
}
inline bool JSScript::hasGlobal(const js::GlobalObject* global) const {
return global == realm()->unsafeUnbarrieredMaybeGlobal();
}
inline js::LexicalScope* JSScript::maybeNamedLambdaScope() const {
// Dynamically created Functions via the 'new Function' are considered
// named lambdas but they do not have the named lambda scope of
// textually-created named lambdas.
js::Scope* scope = outermostScope();
if (scope->kind() == js::ScopeKind::NamedLambda ||
scope->kind() == js::ScopeKind::StrictNamedLambda) {
MOZ_ASSERT_IF(!strict(), scope->kind() == js::ScopeKind::NamedLambda);
MOZ_ASSERT_IF(strict(), scope->kind() == js::ScopeKind::StrictNamedLambda);
return &scope->as<js::LexicalScope>();
}
return nullptr;
}
inline js::Shape* JSScript::initialEnvironmentShape() const {
js::Scope* scope = bodyScope();
if (scope->is<js::FunctionScope>()) {
if (js::Shape* envShape = scope->environmentShape()) {
return envShape;
}
if (js::Scope* namedLambdaScope = maybeNamedLambdaScope()) {
return namedLambdaScope->environmentShape();
}
} else if (scope->is<js::EvalScope>()) {
return scope->environmentShape();
}
return nullptr;
}
inline JSPrincipals* JSScript::principals() { return realm()->principals(); }
inline void JSScript::setBaselineScript(
JSRuntime* rt, js::jit::BaselineScript* baselineScript) {
if (hasBaselineScript()) {
js::jit::BaselineScript::writeBarrierPre(zone(), baseline);
}
MOZ_ASSERT(!ion || ion == ION_DISABLED_SCRIPT);
baseline = baselineScript;
resetWarmUpResetCounter();
updateJitCodeRaw(rt);
}
inline bool JSScript::ensureHasAnalyzedArgsUsage(JSContext* cx) {
if (analyzedArgsUsage()) {
return true;
}
return js::jit::AnalyzeArgumentsUsage(cx, this);
}
inline bool JSScript::isDebuggee() const {
return realm_->debuggerObservesAllExecution() || hasDebugScript();
}
inline js::jit::ICScript* JSScript::icScript() const {
MOZ_ASSERT(hasICScript());
return types_->icScript();
}
#endif /* vm_JSScript_inl_h */