js/src/jsscriptinlines.h
author Till Schneidereit <till@tillschneidereit.net>
Thu, 09 Jan 2014 17:13:25 +0100
changeset 178946 0292b2de36c0dede739ce870f47fe8eeb72ab688
parent 178106 a95b638234d5996ba886eb0449a2828d43eaa09a
child 182545 05fd25b6979ef8019400cd2fd8f0385e713d8e76
permissions -rw-r--r--
Bug 886193 - Part 2: Introduce JSScript::nonDelazifyingFunction and use it whereever possible. r=jandem

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * vim: set ts=8 sts=4 et sw=4 tw=99:
 * 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 jsscriptinlines_h
#define jsscriptinlines_h

#include "jsscript.h"

#include "jit/AsmJSLink.h"
#include "jit/BaselineJIT.h"
#include "vm/ScopeObject.h"

#include "jscompartmentinlines.h"

#include "vm/Shape-inl.h"

namespace js {

inline
Bindings::Bindings()
    : callObjShape_(nullptr), bindingArrayAndFlag_(TEMPORARY_STORAGE_BIT), numArgs_(0), numVars_(0)
{}

inline
AliasedFormalIter::AliasedFormalIter(JSScript *script)
  : begin_(script->bindingArray()),
    p_(begin_),
    end_(begin_ + (script->funHasAnyAliasedFormal() ? script->numArgs() : 0)),
    slot_(CallObject::RESERVED_SLOTS)
{
    settle();
}

inline void
ScriptCounts::destroy(FreeOp *fop)
{
    fop->free_(pcCountsVector);
    fop->delete_(ionCounts);
}

void
SetFrameArgumentsObject(JSContext *cx, AbstractFramePtr frame,
                        HandleScript script, JSObject *argsobj);

inline JSFunction *
LazyScript::functionDelazifying(JSContext *cx) const
{
    if (function_ && !function_->getOrCreateScript(cx))
        return nullptr;
    return function_;
}

} // namespace js

inline JSFunction *
JSScript::functionDelazifying() const
{
    js::AutoThreadSafeAccess ts(this);
    JS_ASSERT(js::CurrentThreadCanWriteCompilationData());
    if (function_ && function_->isInterpretedLazy())
        function_->setUnlazifiedScript(const_cast<JSScript *>(this));
    return function_;
}

inline void
JSScript::setFunction(JSFunction *fun)
{
    JS_ASSERT(fun->isTenured());
    function_ = fun;
}

inline void
JSScript::ensureNonLazyCanonicalFunction(JSContext *cx)
{
    // Infallibly delazify the canonical script.
    if (function_ && function_->isInterpretedLazy()) {
        js::AutoLockForCompilation lock(cx);
        functionDelazifying();
    }
}

inline JSFunction *
JSScript::getFunction(size_t index)
{
    JSFunction *fun = &getObject(index)->as<JSFunction>();
#ifdef DEBUG
    JS_ASSERT_IF(fun->isNative(), IsAsmJSModuleNative(fun->native()));
#endif
    return fun;
}

inline JSFunction *
JSScript::getCallerFunction()
{
    JS_ASSERT(savedCallerFun());
    return getFunction(0);
}

inline JSFunction *
JSScript::functionOrCallerFunction()
{
    if (functionNonDelazifying())
        return functionNonDelazifying();
    if (savedCallerFun())
        return getCallerFunction();
    return nullptr;
}

inline js::RegExpObject *
JSScript::getRegExp(size_t index)
{
    js::ObjectArray *arr = regexps();
    JS_ASSERT(uint32_t(index) < arr->length);
    JSObject *obj = arr->vector[index];
    JS_ASSERT(obj->is<js::RegExpObject>());
    return (js::RegExpObject *) obj;
}

inline js::RegExpObject *
JSScript::getRegExp(jsbytecode *pc)
{
    JS_ASSERT(containsPC(pc) && containsPC(pc + sizeof(uint32_t)));
    return getRegExp(GET_UINT32_INDEX(pc));
}

inline js::GlobalObject &
JSScript::global() const
{
    /*
     * A JSScript always marks its compartment's global (via bindings) so we
     * can assert that maybeGlobal is non-null here.
     */
    js::AutoThreadSafeAccess ts(this);
    return *compartment()->maybeGlobal();
}

inline JSPrincipals *
JSScript::principals()
{
    return compartment()->principals;
}

inline JSFunction *
JSScript::originalFunction() const {
    if (!isCallsiteClone())
        return nullptr;
    return &enclosingScopeOrOriginalFunction_->as<JSFunction>();
}

inline void
JSScript::setIsCallsiteClone(JSObject *fun) {
    JS_ASSERT(shouldCloneAtCallsite());
    shouldCloneAtCallsite_ = false;
    isCallsiteClone_ = true;
    JS_ASSERT(isCallsiteClone());
    JS_ASSERT(fun->is<JSFunction>());
    enclosingScopeOrOriginalFunction_ = fun;
}

inline void
JSScript::setBaselineScript(JSContext *maybecx, js::jit::BaselineScript *baselineScript) {
#ifdef JS_ION
    if (hasBaselineScript())
        js::jit::BaselineScript::writeBarrierPre(tenuredZone(), baseline);
#endif
    mozilla::Maybe<js::AutoLockForCompilation> lock;
    if (maybecx)
        lock.construct(maybecx);
    baseline = baselineScript;
    updateBaselineOrIonRaw();
}

#endif /* jsscriptinlines_h */