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| -rw-r--r-- | js/src/vm/Stack-inl.h | 859 |
1 files changed, 859 insertions, 0 deletions
diff --git a/js/src/vm/Stack-inl.h b/js/src/vm/Stack-inl.h new file mode 100644 index 0000000000..e94c4f6be0 --- /dev/null +++ b/js/src/vm/Stack-inl.h @@ -0,0 +1,859 @@ +/* -*- 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_Stack_inl_h +#define vm_Stack_inl_h + +#include "vm/Stack.h" + +#include "mozilla/PodOperations.h" + +#include "jit/BaselineFrame.h" +#include "jit/RematerializedFrame.h" +#include "js/friend/StackLimits.h" // js::ReportOverRecursed +#include "vm/EnvironmentObject.h" +#include "vm/Interpreter.h" +#include "vm/JSContext.h" +#include "vm/JSScript.h" + +#include "jit/BaselineFrame-inl.h" +#include "jit/RematerializedFrame-inl.h" // js::jit::RematerializedFrame::unsetIsDebuggee +#include "vm/JSScript-inl.h" +#include "vm/NativeObject-inl.h" + +namespace js { + +inline HandleObject InterpreterFrame::environmentChain() const { + return HandleObject::fromMarkedLocation(&envChain_); +} + +inline GlobalObject& InterpreterFrame::global() const { + return script()->global(); +} + +inline ExtensibleLexicalEnvironmentObject& +InterpreterFrame::extensibleLexicalEnvironment() const { + return NearestEnclosingExtensibleLexicalEnvironment(environmentChain()); +} + +inline void InterpreterFrame::initCallFrame(InterpreterFrame* prev, + jsbytecode* prevpc, Value* prevsp, + JSFunction& callee, + JSScript* script, Value* argv, + uint32_t nactual, + MaybeConstruct constructing) { + MOZ_ASSERT(callee.baseScript() == script); + + /* Initialize stack frame members. */ + flags_ = 0; + if (constructing) { + flags_ |= CONSTRUCTING; + } + argv_ = argv; + script_ = script; + nactual_ = nactual; + envChain_ = callee.environment(); + prev_ = prev; + prevpc_ = prevpc; + prevsp_ = prevsp; + + if (script->isDebuggee()) { + setIsDebuggee(); + } + + initLocals(); +} + +inline void InterpreterFrame::initLocals() { + SetValueRangeToUndefined(slots(), script()->nfixed()); +} + +inline Value& InterpreterFrame::unaliasedLocal(uint32_t i) { + MOZ_ASSERT(i < script()->nfixed()); + return slots()[i]; +} + +inline Value& InterpreterFrame::unaliasedFormal( + unsigned i, MaybeCheckAliasing checkAliasing) { + MOZ_ASSERT(i < numFormalArgs()); + MOZ_ASSERT_IF(checkAliasing, !script()->argsObjAliasesFormals()); + MOZ_ASSERT_IF(checkAliasing, !script()->formalIsAliased(i)); + return argv()[i]; +} + +inline Value& InterpreterFrame::unaliasedActual( + unsigned i, MaybeCheckAliasing checkAliasing) { + MOZ_ASSERT(i < numActualArgs()); + MOZ_ASSERT_IF(checkAliasing, !script()->argsObjAliasesFormals()); + MOZ_ASSERT_IF(checkAliasing && i < numFormalArgs(), + !script()->formalIsAliased(i)); + return argv()[i]; +} + +template <class Op> +inline void InterpreterFrame::unaliasedForEachActual(Op op) { + // Don't assert !script()->funHasAnyAliasedFormal() since this function is + // called from ArgumentsObject::createUnexpected() which can access aliased + // slots. + + const Value* argsEnd = argv() + numActualArgs(); + for (const Value* p = argv(); p < argsEnd; ++p) { + op(*p); + } +} + +inline ArgumentsObject& InterpreterFrame::argsObj() const { + MOZ_ASSERT(script()->needsArgsObj()); + MOZ_ASSERT(flags_ & HAS_ARGS_OBJ); + return *argsObj_; +} + +inline void InterpreterFrame::initArgsObj(ArgumentsObject& argsobj) { + MOZ_ASSERT(script()->needsArgsObj()); + flags_ |= HAS_ARGS_OBJ; + argsObj_ = &argsobj; +} + +inline EnvironmentObject& InterpreterFrame::aliasedEnvironment( + EnvironmentCoordinate ec) const { + JSObject* env = &environmentChain()->as<EnvironmentObject>(); + for (unsigned i = ec.hops(); i; i--) { + env = &env->as<EnvironmentObject>().enclosingEnvironment(); + } + return env->as<EnvironmentObject>(); +} + +inline EnvironmentObject& InterpreterFrame::aliasedEnvironmentMaybeDebug( + EnvironmentCoordinate ec) const { + JSObject* env = environmentChain(); + for (unsigned i = ec.hops(); i; i--) { + if (env->is<EnvironmentObject>()) { + env = &env->as<EnvironmentObject>().enclosingEnvironment(); + } else { + MOZ_ASSERT(env->is<DebugEnvironmentProxy>()); + env = &env->as<DebugEnvironmentProxy>().enclosingEnvironment(); + } + } + return env->is<EnvironmentObject>() + ? env->as<EnvironmentObject>() + : env->as<DebugEnvironmentProxy>().environment(); +} + +template <typename SpecificEnvironment> +inline void InterpreterFrame::pushOnEnvironmentChain(SpecificEnvironment& env) { + MOZ_ASSERT(*environmentChain() == env.enclosingEnvironment()); + envChain_ = &env; + if (IsFrameInitialEnvironment(this, env)) { + flags_ |= HAS_INITIAL_ENV; + } +} + +template <typename SpecificEnvironment> +inline void InterpreterFrame::popOffEnvironmentChain() { + MOZ_ASSERT(envChain_->is<SpecificEnvironment>()); + envChain_ = &envChain_->as<SpecificEnvironment>().enclosingEnvironment(); +} + +inline void InterpreterFrame::replaceInnermostEnvironment( + BlockLexicalEnvironmentObject& env) { + MOZ_ASSERT( + env.enclosingEnvironment() == + envChain_->as<BlockLexicalEnvironmentObject>().enclosingEnvironment()); + envChain_ = &env; +} + +bool InterpreterFrame::hasInitialEnvironment() const { + MOZ_ASSERT(script()->initialEnvironmentShape()); + return flags_ & HAS_INITIAL_ENV; +} + +inline CallObject& InterpreterFrame::callObj() const { + MOZ_ASSERT(callee().needsCallObject()); + + JSObject* pobj = environmentChain(); + while (MOZ_UNLIKELY(!pobj->is<CallObject>())) { + pobj = pobj->enclosingEnvironment(); + } + return pobj->as<CallObject>(); +} + +inline void InterpreterFrame::unsetIsDebuggee() { + MOZ_ASSERT(!script()->isDebuggee()); + flags_ &= ~DEBUGGEE; +} + +inline bool InterpreterFrame::saveGeneratorSlots(JSContext* cx, unsigned nslots, + ArrayObject* dest) const { + return dest->initDenseElementsFromRange(cx, slots(), slots() + nslots); +} + +inline void InterpreterFrame::restoreGeneratorSlots(ArrayObject* src) { + MOZ_ASSERT(script()->nfixed() <= src->length()); + MOZ_ASSERT(src->length() <= script()->nslots()); + MOZ_ASSERT(src->getDenseInitializedLength() == src->length()); + const Value* srcElements = src->getDenseElements(); + mozilla::PodCopy(slots(), srcElements, src->length()); +} + +/*****************************************************************************/ + +inline void InterpreterStack::purge(JSRuntime* rt) { + rt->gc.queueUnusedLifoBlocksForFree(&allocator_); +} + +uint8_t* InterpreterStack::allocateFrame(JSContext* cx, size_t size) { + size_t maxFrames; + if (cx->realm()->principals() == cx->runtime()->trustedPrincipals()) { + maxFrames = MAX_FRAMES_TRUSTED; + } else { + maxFrames = MAX_FRAMES; + } + + if (MOZ_UNLIKELY(frameCount_ >= maxFrames)) { + ReportOverRecursed(cx); + return nullptr; + } + + uint8_t* buffer = reinterpret_cast<uint8_t*>(allocator_.alloc(size)); + if (!buffer) { + ReportOutOfMemory(cx); + return nullptr; + } + + frameCount_++; + return buffer; +} + +MOZ_ALWAYS_INLINE InterpreterFrame* InterpreterStack::getCallFrame( + JSContext* cx, const CallArgs& args, HandleScript script, + MaybeConstruct constructing, Value** pargv) { + JSFunction* fun = &args.callee().as<JSFunction>(); + + MOZ_ASSERT(fun->baseScript() == script); + unsigned nformal = fun->nargs(); + unsigned nvals = script->nslots(); + + if (args.length() >= nformal) { + *pargv = args.array(); + uint8_t* buffer = + allocateFrame(cx, sizeof(InterpreterFrame) + nvals * sizeof(Value)); + return reinterpret_cast<InterpreterFrame*>(buffer); + } + + // Pad any missing arguments with |undefined|. + MOZ_ASSERT(args.length() < nformal); + + unsigned nfunctionState = 2 + constructing; // callee, |this|, |new.target| + + nvals += nformal + nfunctionState; + uint8_t* buffer = + allocateFrame(cx, sizeof(InterpreterFrame) + nvals * sizeof(Value)); + if (!buffer) { + return nullptr; + } + + Value* argv = reinterpret_cast<Value*>(buffer); + unsigned nmissing = nformal - args.length(); + + mozilla::PodCopy(argv, args.base(), 2 + args.length()); + SetValueRangeToUndefined(argv + 2 + args.length(), nmissing); + + if (constructing) { + argv[2 + nformal] = args.newTarget(); + } + + *pargv = argv + 2; + return reinterpret_cast<InterpreterFrame*>(argv + nfunctionState + nformal); +} + +MOZ_ALWAYS_INLINE bool InterpreterStack::pushInlineFrame( + JSContext* cx, InterpreterRegs& regs, const CallArgs& args, + HandleScript script, MaybeConstruct constructing) { + RootedFunction callee(cx, &args.callee().as<JSFunction>()); + MOZ_ASSERT(regs.sp == args.end()); + MOZ_ASSERT(callee->baseScript() == script); + + InterpreterFrame* prev = regs.fp(); + jsbytecode* prevpc = regs.pc; + Value* prevsp = regs.sp; + MOZ_ASSERT(prev); + + LifoAlloc::Mark mark = allocator_.mark(); + + Value* argv; + InterpreterFrame* fp = getCallFrame(cx, args, script, constructing, &argv); + if (!fp) { + return false; + } + + fp->mark_ = mark; + + /* Initialize frame, locals, regs. */ + fp->initCallFrame(prev, prevpc, prevsp, *callee, script, argv, args.length(), + constructing); + + regs.prepareToRun(*fp, script); + return true; +} + +MOZ_ALWAYS_INLINE bool InterpreterStack::resumeGeneratorCallFrame( + JSContext* cx, InterpreterRegs& regs, HandleFunction callee, + HandleObject envChain) { + MOZ_ASSERT(callee->isGenerator() || callee->isAsync()); + RootedScript script(cx, callee->nonLazyScript()); + InterpreterFrame* prev = regs.fp(); + jsbytecode* prevpc = regs.pc; + Value* prevsp = regs.sp; + MOZ_ASSERT(prev); + + LifoAlloc::Mark mark = allocator_.mark(); + + // (Async) generators and async functions are not constructors. + MOZ_ASSERT(!callee->isConstructor()); + + // Include callee, |this|, and maybe |new.target| + unsigned nformal = callee->nargs(); + unsigned nvals = 2 + nformal + script->nslots(); + + uint8_t* buffer = + allocateFrame(cx, sizeof(InterpreterFrame) + nvals * sizeof(Value)); + if (!buffer) { + return false; + } + + Value* argv = reinterpret_cast<Value*>(buffer) + 2; + argv[-2] = ObjectValue(*callee); + argv[-1] = UndefinedValue(); + SetValueRangeToUndefined(argv, nformal); + + InterpreterFrame* fp = reinterpret_cast<InterpreterFrame*>(argv + nformal); + fp->mark_ = mark; + fp->initCallFrame(prev, prevpc, prevsp, *callee, script, argv, 0, + NO_CONSTRUCT); + fp->resumeGeneratorFrame(envChain); + + regs.prepareToRun(*fp, script); + return true; +} + +MOZ_ALWAYS_INLINE void InterpreterStack::popInlineFrame(InterpreterRegs& regs) { + InterpreterFrame* fp = regs.fp(); + regs.popInlineFrame(); + regs.sp[-1] = fp->returnValue(); + releaseFrame(fp); + MOZ_ASSERT(regs.fp()); +} + +inline HandleValue AbstractFramePtr::returnValue() const { + if (isInterpreterFrame()) { + return asInterpreterFrame()->returnValue(); + } + if (isWasmDebugFrame()) { + return asWasmDebugFrame()->returnValue(); + } + return asBaselineFrame()->returnValue(); +} + +inline void AbstractFramePtr::setReturnValue(const Value& rval) const { + if (isInterpreterFrame()) { + asInterpreterFrame()->setReturnValue(rval); + return; + } + if (isBaselineFrame()) { + asBaselineFrame()->setReturnValue(rval); + return; + } + if (isWasmDebugFrame()) { + // TODO handle wasm function return value + // The function is called from Debugger::slowPathOnLeaveFrame -- + // ignoring value for wasm. + return; + } + asRematerializedFrame()->setReturnValue(rval); +} + +inline JSObject* AbstractFramePtr::environmentChain() const { + if (isInterpreterFrame()) { + return asInterpreterFrame()->environmentChain(); + } + if (isBaselineFrame()) { + return asBaselineFrame()->environmentChain(); + } + if (isWasmDebugFrame()) { + return &global()->lexicalEnvironment(); + } + return asRematerializedFrame()->environmentChain(); +} + +template <typename SpecificEnvironment> +inline void AbstractFramePtr::pushOnEnvironmentChain(SpecificEnvironment& env) { + if (isInterpreterFrame()) { + asInterpreterFrame()->pushOnEnvironmentChain(env); + return; + } + if (isBaselineFrame()) { + asBaselineFrame()->pushOnEnvironmentChain(env); + return; + } + asRematerializedFrame()->pushOnEnvironmentChain(env); +} + +template <typename SpecificEnvironment> +inline void AbstractFramePtr::popOffEnvironmentChain() { + if (isInterpreterFrame()) { + asInterpreterFrame()->popOffEnvironmentChain<SpecificEnvironment>(); + return; + } + if (isBaselineFrame()) { + asBaselineFrame()->popOffEnvironmentChain<SpecificEnvironment>(); + return; + } + asRematerializedFrame()->popOffEnvironmentChain<SpecificEnvironment>(); +} + +inline CallObject& AbstractFramePtr::callObj() const { + if (isInterpreterFrame()) { + return asInterpreterFrame()->callObj(); + } + if (isBaselineFrame()) { + return asBaselineFrame()->callObj(); + } + return asRematerializedFrame()->callObj(); +} + +inline bool AbstractFramePtr::initFunctionEnvironmentObjects(JSContext* cx) { + return js::InitFunctionEnvironmentObjects(cx, *this); +} + +inline bool AbstractFramePtr::pushVarEnvironment(JSContext* cx, + Handle<Scope*> scope) { + return js::PushVarEnvironmentObject(cx, scope, *this); +} + +inline JS::Realm* AbstractFramePtr::realm() const { + return environmentChain()->nonCCWRealm(); +} + +inline unsigned AbstractFramePtr::numActualArgs() const { + if (isInterpreterFrame()) { + return asInterpreterFrame()->numActualArgs(); + } + if (isBaselineFrame()) { + return asBaselineFrame()->numActualArgs(); + } + return asRematerializedFrame()->numActualArgs(); +} + +inline unsigned AbstractFramePtr::numFormalArgs() const { + if (isInterpreterFrame()) { + return asInterpreterFrame()->numFormalArgs(); + } + if (isBaselineFrame()) { + return asBaselineFrame()->numFormalArgs(); + } + return asRematerializedFrame()->numFormalArgs(); +} + +inline Value& AbstractFramePtr::unaliasedLocal(uint32_t i) { + if (isInterpreterFrame()) { + return asInterpreterFrame()->unaliasedLocal(i); + } + if (isBaselineFrame()) { + return asBaselineFrame()->unaliasedLocal(i); + } + return asRematerializedFrame()->unaliasedLocal(i); +} + +inline Value& AbstractFramePtr::unaliasedFormal( + unsigned i, MaybeCheckAliasing checkAliasing) { + if (isInterpreterFrame()) { + return asInterpreterFrame()->unaliasedFormal(i, checkAliasing); + } + if (isBaselineFrame()) { + return asBaselineFrame()->unaliasedFormal(i, checkAliasing); + } + return asRematerializedFrame()->unaliasedFormal(i, checkAliasing); +} + +inline Value& AbstractFramePtr::unaliasedActual( + unsigned i, MaybeCheckAliasing checkAliasing) { + if (isInterpreterFrame()) { + return asInterpreterFrame()->unaliasedActual(i, checkAliasing); + } + if (isBaselineFrame()) { + return asBaselineFrame()->unaliasedActual(i, checkAliasing); + } + return asRematerializedFrame()->unaliasedActual(i, checkAliasing); +} + +inline bool AbstractFramePtr::hasInitialEnvironment() const { + if (isInterpreterFrame()) { + return asInterpreterFrame()->hasInitialEnvironment(); + } + if (isBaselineFrame()) { + return asBaselineFrame()->hasInitialEnvironment(); + } + return asRematerializedFrame()->hasInitialEnvironment(); +} + +inline bool AbstractFramePtr::isGlobalFrame() const { + if (isInterpreterFrame()) { + return asInterpreterFrame()->isGlobalFrame(); + } + if (isBaselineFrame()) { + return asBaselineFrame()->isGlobalFrame(); + } + if (isWasmDebugFrame()) { + return false; + } + return asRematerializedFrame()->isGlobalFrame(); +} + +inline bool AbstractFramePtr::isModuleFrame() const { + if (isInterpreterFrame()) { + return asInterpreterFrame()->isModuleFrame(); + } + if (isBaselineFrame()) { + return asBaselineFrame()->isModuleFrame(); + } + if (isWasmDebugFrame()) { + return false; + } + return asRematerializedFrame()->isModuleFrame(); +} + +inline bool AbstractFramePtr::isEvalFrame() const { + if (isInterpreterFrame()) { + return asInterpreterFrame()->isEvalFrame(); + } + if (isBaselineFrame()) { + return asBaselineFrame()->isEvalFrame(); + } + if (isWasmDebugFrame()) { + return false; + } + MOZ_ASSERT(isRematerializedFrame()); + return false; +} + +inline bool AbstractFramePtr::isDebuggerEvalFrame() const { + if (isInterpreterFrame()) { + return asInterpreterFrame()->isDebuggerEvalFrame(); + } + if (isBaselineFrame()) { + return asBaselineFrame()->isDebuggerEvalFrame(); + } + MOZ_ASSERT(isRematerializedFrame()); + return false; +} + +inline bool AbstractFramePtr::isDebuggee() const { + if (isInterpreterFrame()) { + return asInterpreterFrame()->isDebuggee(); + } + if (isBaselineFrame()) { + return asBaselineFrame()->isDebuggee(); + } + if (isWasmDebugFrame()) { + return asWasmDebugFrame()->isDebuggee(); + } + return asRematerializedFrame()->isDebuggee(); +} + +inline void AbstractFramePtr::setIsDebuggee() { + if (isInterpreterFrame()) { + asInterpreterFrame()->setIsDebuggee(); + } else if (isBaselineFrame()) { + asBaselineFrame()->setIsDebuggee(); + } else if (isWasmDebugFrame()) { + asWasmDebugFrame()->setIsDebuggee(); + } else { + asRematerializedFrame()->setIsDebuggee(); + } +} + +inline void AbstractFramePtr::unsetIsDebuggee() { + if (isInterpreterFrame()) { + asInterpreterFrame()->unsetIsDebuggee(); + } else if (isBaselineFrame()) { + asBaselineFrame()->unsetIsDebuggee(); + } else if (isWasmDebugFrame()) { + asWasmDebugFrame()->unsetIsDebuggee(); + } else { + asRematerializedFrame()->unsetIsDebuggee(); + } +} + +inline bool AbstractFramePtr::isConstructing() const { + if (isInterpreterFrame()) { + return asInterpreterFrame()->isConstructing(); + } + if (isBaselineFrame()) { + return asBaselineFrame()->isConstructing(); + } + if (isRematerializedFrame()) { + return asRematerializedFrame()->isConstructing(); + } + MOZ_CRASH("Unexpected frame"); +} + +inline bool AbstractFramePtr::hasCachedSavedFrame() const { + if (isInterpreterFrame()) { + return asInterpreterFrame()->hasCachedSavedFrame(); + } + if (isBaselineFrame()) { + return asBaselineFrame()->framePrefix()->hasCachedSavedFrame(); + } + if (isWasmDebugFrame()) { + return asWasmDebugFrame()->hasCachedSavedFrame(); + } + return asRematerializedFrame()->hasCachedSavedFrame(); +} + +inline bool AbstractFramePtr::hasArgs() const { return isFunctionFrame(); } + +inline bool AbstractFramePtr::hasScript() const { return !isWasmDebugFrame(); } + +inline JSScript* AbstractFramePtr::script() const { + if (isInterpreterFrame()) { + return asInterpreterFrame()->script(); + } + if (isBaselineFrame()) { + return asBaselineFrame()->script(); + } + return asRematerializedFrame()->script(); +} + +inline wasm::Instance* AbstractFramePtr::wasmInstance() const { + return asWasmDebugFrame()->instance(); +} + +inline GlobalObject* AbstractFramePtr::global() const { + if (isWasmDebugFrame()) { + return asWasmDebugFrame()->global(); + } + return &script()->global(); +} + +inline bool AbstractFramePtr::hasGlobal(const GlobalObject* global) const { + if (isWasmDebugFrame()) { + return asWasmDebugFrame()->hasGlobal(global); + } + return script()->hasGlobal(global); +} + +inline JSFunction* AbstractFramePtr::callee() const { + if (isInterpreterFrame()) { + return &asInterpreterFrame()->callee(); + } + if (isBaselineFrame()) { + return asBaselineFrame()->callee(); + } + return asRematerializedFrame()->callee(); +} + +inline Value AbstractFramePtr::calleev() const { + if (isInterpreterFrame()) { + return asInterpreterFrame()->calleev(); + } + if (isBaselineFrame()) { + return asBaselineFrame()->calleev(); + } + return asRematerializedFrame()->calleev(); +} + +inline bool AbstractFramePtr::isFunctionFrame() const { + if (isInterpreterFrame()) { + return asInterpreterFrame()->isFunctionFrame(); + } + if (isBaselineFrame()) { + return asBaselineFrame()->isFunctionFrame(); + } + if (isWasmDebugFrame()) { + return false; + } + return asRematerializedFrame()->isFunctionFrame(); +} + +inline bool AbstractFramePtr::isGeneratorFrame() const { + if (!isFunctionFrame() && !isModuleFrame()) { + return false; + } + JSScript* s = script(); + return s->isGenerator() || s->isAsync(); +} + +inline bool AbstractFramePtr::saveGeneratorSlots(JSContext* cx, unsigned nslots, + ArrayObject* dest) const { + MOZ_ASSERT(isGeneratorFrame()); + if (isInterpreterFrame()) { + return asInterpreterFrame()->saveGeneratorSlots(cx, nslots, dest); + } + MOZ_ASSERT(isBaselineFrame(), "unexpected generator frame in Ion"); + return asBaselineFrame()->saveGeneratorSlots(cx, nslots, dest); +} + +inline Value* AbstractFramePtr::argv() const { + if (isInterpreterFrame()) { + return asInterpreterFrame()->argv(); + } + if (isBaselineFrame()) { + return asBaselineFrame()->argv(); + } + return asRematerializedFrame()->argv(); +} + +inline bool AbstractFramePtr::hasArgsObj() const { + if (isInterpreterFrame()) { + return asInterpreterFrame()->hasArgsObj(); + } + if (isBaselineFrame()) { + return asBaselineFrame()->hasArgsObj(); + } + return asRematerializedFrame()->hasArgsObj(); +} + +inline ArgumentsObject& AbstractFramePtr::argsObj() const { + if (isInterpreterFrame()) { + return asInterpreterFrame()->argsObj(); + } + if (isBaselineFrame()) { + return asBaselineFrame()->argsObj(); + } + return asRematerializedFrame()->argsObj(); +} + +inline void AbstractFramePtr::initArgsObj(ArgumentsObject& argsobj) const { + if (isInterpreterFrame()) { + asInterpreterFrame()->initArgsObj(argsobj); + return; + } + asBaselineFrame()->initArgsObj(argsobj); +} + +inline bool AbstractFramePtr::prevUpToDate() const { + if (isInterpreterFrame()) { + return asInterpreterFrame()->prevUpToDate(); + } + if (isBaselineFrame()) { + return asBaselineFrame()->prevUpToDate(); + } + if (isWasmDebugFrame()) { + return asWasmDebugFrame()->prevUpToDate(); + } + return asRematerializedFrame()->prevUpToDate(); +} + +inline void AbstractFramePtr::setPrevUpToDate() const { + if (isInterpreterFrame()) { + asInterpreterFrame()->setPrevUpToDate(); + return; + } + if (isBaselineFrame()) { + asBaselineFrame()->setPrevUpToDate(); + return; + } + if (isWasmDebugFrame()) { + asWasmDebugFrame()->setPrevUpToDate(); + return; + } + asRematerializedFrame()->setPrevUpToDate(); +} + +inline void AbstractFramePtr::unsetPrevUpToDate() const { + if (isInterpreterFrame()) { + asInterpreterFrame()->unsetPrevUpToDate(); + return; + } + if (isBaselineFrame()) { + asBaselineFrame()->unsetPrevUpToDate(); + return; + } + if (isWasmDebugFrame()) { + asWasmDebugFrame()->unsetPrevUpToDate(); + return; + } + asRematerializedFrame()->unsetPrevUpToDate(); +} + +inline Value& AbstractFramePtr::thisArgument() const { + if (isInterpreterFrame()) { + return asInterpreterFrame()->thisArgument(); + } + if (isBaselineFrame()) { + return asBaselineFrame()->thisArgument(); + } + return asRematerializedFrame()->thisArgument(); +} + +inline bool AbstractFramePtr::debuggerNeedsCheckPrimitiveReturn() const { + if (isWasmDebugFrame()) { + return false; + } + return script()->isDerivedClassConstructor(); +} + +InterpreterActivation::InterpreterActivation(RunState& state, JSContext* cx, + InterpreterFrame* entryFrame) + : Activation(cx, Interpreter), + entryFrame_(entryFrame), + opMask_(0) +#ifdef DEBUG + , + oldFrameCount_(cx->interpreterStack().frameCount_) +#endif +{ + regs_.prepareToRun(*entryFrame, state.script()); + MOZ_ASSERT(regs_.pc == state.script()->code()); +} + +InterpreterActivation::~InterpreterActivation() { + // Pop all inline frames. + while (regs_.fp() != entryFrame_) { + popInlineFrame(regs_.fp()); + } + + MOZ_ASSERT(oldFrameCount_ == cx_->interpreterStack().frameCount_); + MOZ_ASSERT_IF(oldFrameCount_ == 0, + cx_->interpreterStack().allocator_.used() == 0); + + if (entryFrame_) { + cx_->interpreterStack().releaseFrame(entryFrame_); + } +} + +inline bool InterpreterActivation::pushInlineFrame( + const CallArgs& args, HandleScript script, MaybeConstruct constructing) { + if (!cx_->interpreterStack().pushInlineFrame(cx_, regs_, args, script, + constructing)) { + return false; + } + MOZ_ASSERT(regs_.fp()->script()->compartment() == compartment()); + return true; +} + +inline void InterpreterActivation::popInlineFrame(InterpreterFrame* frame) { + (void)frame; // Quell compiler warning. + MOZ_ASSERT(regs_.fp() == frame); + MOZ_ASSERT(regs_.fp() != entryFrame_); + + cx_->interpreterStack().popInlineFrame(regs_); +} + +inline bool InterpreterActivation::resumeGeneratorFrame(HandleFunction callee, + HandleObject envChain) { + InterpreterStack& stack = cx_->interpreterStack(); + if (!stack.resumeGeneratorCallFrame(cx_, regs_, callee, envChain)) { + return false; + } + + MOZ_ASSERT(regs_.fp()->script()->compartment() == compartment_); + return true; +} + +} /* namespace js */ + +#endif /* vm_Stack_inl_h */ |