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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 jit_BaselineFrame_inl_h
#define jit_BaselineFrame_inl_h
#include "jit/BaselineFrame.h"
#include "jit/TrialInlining.h"
#include "jit/VMFunctions.h"
#include "vm/JSContext.h"
#include "vm/Realm.h"
#include "vm/EnvironmentObject-inl.h"
#include "vm/JSScript-inl.h"
#include "vm/NativeObject-inl.h" // js::NativeObject::initDenseElementsFromRange
namespace js {
namespace jit {
template <typename SpecificEnvironment>
inline void BaselineFrame::pushOnEnvironmentChain(SpecificEnvironment& env) {
MOZ_ASSERT(*environmentChain() == env.enclosingEnvironment());
envChain_ = &env;
if (IsFrameInitialEnvironment(this, env)) {
flags_ |= HAS_INITIAL_ENV;
}
}
template <typename SpecificEnvironment>
inline void BaselineFrame::popOffEnvironmentChain() {
MOZ_ASSERT(envChain_->is<SpecificEnvironment>());
envChain_ = &envChain_->as<SpecificEnvironment>().enclosingEnvironment();
}
inline void BaselineFrame::replaceInnermostEnvironment(EnvironmentObject& env) {
MOZ_ASSERT(env.enclosingEnvironment() ==
envChain_->as<EnvironmentObject>().enclosingEnvironment());
envChain_ = &env;
}
inline bool BaselineFrame::saveGeneratorSlots(JSContext* cx, unsigned nslots,
ArrayObject* dest) const {
// By convention, generator slots are stored in interpreter order,
// which is the reverse of BaselineFrame order.
MOZ_ASSERT(nslots == numValueSlots(debugFrameSize()) - 1);
const Value* end = reinterpret_cast<const Value*>(this);
mozilla::Span<const Value> span{end - nslots, end};
return dest->initDenseElementsFromRange(cx, span.rbegin(), span.rend());
}
inline bool BaselineFrame::pushLexicalEnvironment(JSContext* cx,
Handle<LexicalScope*> scope) {
BlockLexicalEnvironmentObject* env =
BlockLexicalEnvironmentObject::createForFrame(cx, scope, this);
if (!env) {
return false;
}
pushOnEnvironmentChain(*env);
return true;
}
inline bool BaselineFrame::pushClassBodyEnvironment(
JSContext* cx, Handle<ClassBodyScope*> scope) {
ClassBodyLexicalEnvironmentObject* env =
ClassBodyLexicalEnvironmentObject::createForFrame(cx, scope, this);
if (!env) {
return false;
}
pushOnEnvironmentChain(*env);
return true;
}
template <bool IsDebuggee>
inline bool BaselineFrame::freshenLexicalEnvironment(JSContext* cx,
const jsbytecode* pc) {
Rooted<BlockLexicalEnvironmentObject*> current(
cx, &envChain_->as<BlockLexicalEnvironmentObject>());
BlockLexicalEnvironmentObject* clone =
BlockLexicalEnvironmentObject::clone(cx, current);
if (!clone) {
return false;
}
if constexpr (IsDebuggee) {
MOZ_ASSERT(pc);
Rooted<BlockLexicalEnvironmentObject*> cloneRoot(cx, clone);
MOZ_ALWAYS_TRUE(DebugLeaveLexicalEnv(cx, this, pc));
clone = cloneRoot;
}
replaceInnermostEnvironment(*clone);
return true;
}
template <bool IsDebuggee>
inline bool BaselineFrame::recreateLexicalEnvironment(JSContext* cx,
const jsbytecode* pc) {
Rooted<BlockLexicalEnvironmentObject*> current(
cx, &envChain_->as<BlockLexicalEnvironmentObject>());
BlockLexicalEnvironmentObject* clone =
BlockLexicalEnvironmentObject::recreate(cx, current);
if (!clone) {
return false;
}
if constexpr (IsDebuggee) {
MOZ_ASSERT(pc);
Rooted<BlockLexicalEnvironmentObject*> cloneRoot(cx, clone);
MOZ_ALWAYS_TRUE(DebugLeaveLexicalEnv(cx, this, pc));
clone = cloneRoot;
}
replaceInnermostEnvironment(*clone);
return true;
}
inline CallObject& BaselineFrame::callObj() const {
MOZ_ASSERT(hasInitialEnvironment());
MOZ_ASSERT(callee()->needsCallObject());
JSObject* obj = environmentChain();
while (!obj->is<CallObject>()) {
obj = obj->enclosingEnvironment();
}
return obj->as<CallObject>();
}
inline JSScript* BaselineFrame::outerScript() const {
if (!icScript()->isInlined()) {
return script();
}
return icScript()->inliningRoot()->owningScript();
}
inline void BaselineFrame::unsetIsDebuggee() {
MOZ_ASSERT(!script()->isDebuggee());
flags_ &= ~DEBUGGEE;
}
} // namespace jit
} // namespace js
#endif /* jit_BaselineFrame_inl_h */
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