| /* |
| * Copyright (C) 2012-2018 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "CallLinkInfo.h" |
| |
| #include "CallFrameShuffleData.h" |
| #include "DFGOperations.h" |
| #include "DFGThunks.h" |
| #include "FunctionCodeBlock.h" |
| #include "JSCInlines.h" |
| #include "MacroAssembler.h" |
| #include "Opcode.h" |
| #include "Repatch.h" |
| #include <wtf/ListDump.h> |
| |
| #if ENABLE(JIT) |
| namespace JSC { |
| |
| CallLinkInfo::CallType CallLinkInfo::callTypeFor(OpcodeID opcodeID) |
| { |
| if (opcodeID == op_call || opcodeID == op_call_eval) |
| return Call; |
| if (opcodeID == op_call_varargs) |
| return CallVarargs; |
| if (opcodeID == op_construct) |
| return Construct; |
| if (opcodeID == op_construct_varargs) |
| return ConstructVarargs; |
| if (opcodeID == op_tail_call) |
| return TailCall; |
| ASSERT(opcodeID == op_tail_call_varargs || opcodeID == op_tail_call_forward_arguments); |
| return TailCallVarargs; |
| } |
| |
| CallLinkInfo::CallLinkInfo() |
| : m_hasSeenShouldRepatch(false) |
| , m_hasSeenClosure(false) |
| , m_clearedByGC(false) |
| , m_allowStubs(true) |
| , m_isLinked(false) |
| , m_callType(None) |
| , m_calleeGPR(255) |
| , m_maxNumArguments(0) |
| , m_slowPathCount(0) |
| { |
| } |
| |
| CallLinkInfo::~CallLinkInfo() |
| { |
| clearStub(); |
| |
| if (isOnList()) |
| remove(); |
| } |
| |
| void CallLinkInfo::clearStub() |
| { |
| if (!stub()) |
| return; |
| |
| m_stub->clearCallNodesFor(this); |
| m_stub = nullptr; |
| } |
| |
| void CallLinkInfo::unlink(VM& vm) |
| { |
| // We could be called even if we're not linked anymore because of how polymorphic calls |
| // work. Each callsite within the polymorphic call stub may separately ask us to unlink(). |
| if (isLinked()) |
| unlinkFor(vm, *this); |
| |
| // Either we were unlinked, in which case we should not have been on any list, or we unlinked |
| // ourselves so that we're not on any list anymore. |
| RELEASE_ASSERT(!isOnList()); |
| } |
| |
| CodeLocationNearCall<JSInternalPtrTag> CallLinkInfo::callReturnLocation() |
| { |
| RELEASE_ASSERT(!isDirect()); |
| return CodeLocationNearCall<JSInternalPtrTag>(m_callReturnLocationOrPatchableJump, Regular); |
| } |
| |
| CodeLocationJump<JSInternalPtrTag> CallLinkInfo::patchableJump() |
| { |
| RELEASE_ASSERT(callType() == DirectTailCall); |
| return CodeLocationJump<JSInternalPtrTag>(m_callReturnLocationOrPatchableJump); |
| } |
| |
| CodeLocationDataLabelPtr<JSInternalPtrTag> CallLinkInfo::hotPathBegin() |
| { |
| RELEASE_ASSERT(!isDirect()); |
| return CodeLocationDataLabelPtr<JSInternalPtrTag>(m_hotPathBeginOrSlowPathStart); |
| } |
| |
| CodeLocationLabel<JSInternalPtrTag> CallLinkInfo::slowPathStart() |
| { |
| RELEASE_ASSERT(isDirect()); |
| return m_hotPathBeginOrSlowPathStart; |
| } |
| |
| void CallLinkInfo::setCallee(VM& vm, JSCell* owner, JSObject* callee) |
| { |
| RELEASE_ASSERT(!isDirect()); |
| MacroAssembler::repatchPointer(hotPathBegin(), callee); |
| m_calleeOrCodeBlock.set(vm, owner, callee); |
| m_isLinked = true; |
| } |
| |
| void CallLinkInfo::clearCallee() |
| { |
| RELEASE_ASSERT(!isDirect()); |
| MacroAssembler::repatchPointer(hotPathBegin(), nullptr); |
| m_calleeOrCodeBlock.clear(); |
| m_isLinked = false; |
| } |
| |
| JSObject* CallLinkInfo::callee() |
| { |
| RELEASE_ASSERT(!isDirect()); |
| return jsCast<JSObject*>(m_calleeOrCodeBlock.get()); |
| } |
| |
| void CallLinkInfo::setCodeBlock(VM& vm, JSCell* owner, FunctionCodeBlock* codeBlock) |
| { |
| RELEASE_ASSERT(isDirect()); |
| m_calleeOrCodeBlock.setMayBeNull(vm, owner, codeBlock); |
| m_isLinked = true; |
| } |
| |
| void CallLinkInfo::clearCodeBlock() |
| { |
| RELEASE_ASSERT(isDirect()); |
| m_calleeOrCodeBlock.clear(); |
| m_isLinked = false; |
| } |
| |
| FunctionCodeBlock* CallLinkInfo::codeBlock() |
| { |
| RELEASE_ASSERT(isDirect()); |
| return jsCast<FunctionCodeBlock*>(m_calleeOrCodeBlock.get()); |
| } |
| |
| void CallLinkInfo::setLastSeenCallee(VM& vm, const JSCell* owner, JSObject* callee) |
| { |
| RELEASE_ASSERT(!isDirect()); |
| m_lastSeenCalleeOrExecutable.set(vm, owner, callee); |
| } |
| |
| void CallLinkInfo::clearLastSeenCallee() |
| { |
| RELEASE_ASSERT(!isDirect()); |
| m_lastSeenCalleeOrExecutable.clear(); |
| } |
| |
| JSObject* CallLinkInfo::lastSeenCallee() |
| { |
| RELEASE_ASSERT(!isDirect()); |
| return jsCast<JSObject*>(m_lastSeenCalleeOrExecutable.get()); |
| } |
| |
| bool CallLinkInfo::haveLastSeenCallee() |
| { |
| RELEASE_ASSERT(!isDirect()); |
| return !!m_lastSeenCalleeOrExecutable; |
| } |
| |
| void CallLinkInfo::setExecutableDuringCompilation(ExecutableBase* executable) |
| { |
| RELEASE_ASSERT(isDirect()); |
| m_lastSeenCalleeOrExecutable.setWithoutWriteBarrier(executable); |
| } |
| |
| ExecutableBase* CallLinkInfo::executable() |
| { |
| RELEASE_ASSERT(isDirect()); |
| return jsCast<ExecutableBase*>(m_lastSeenCalleeOrExecutable.get()); |
| } |
| |
| void CallLinkInfo::setMaxNumArguments(unsigned value) |
| { |
| RELEASE_ASSERT(isDirect()); |
| RELEASE_ASSERT(value); |
| m_maxNumArguments = value; |
| } |
| |
| void CallLinkInfo::visitWeak(VM& vm) |
| { |
| auto handleSpecificCallee = [&] (JSFunction* callee) { |
| if (Heap::isMarked(callee->executable())) |
| m_hasSeenClosure = true; |
| else |
| m_clearedByGC = true; |
| }; |
| |
| if (isLinked()) { |
| if (stub()) { |
| if (!stub()->visitWeak(vm)) { |
| if (Options::verboseOSR()) { |
| dataLog( |
| "Clearing closure call to ", |
| listDump(stub()->variants()), ", stub routine ", RawPointer(stub()), |
| ".\n"); |
| } |
| unlink(vm); |
| m_clearedByGC = true; |
| } |
| } else if (!Heap::isMarked(m_calleeOrCodeBlock.get())) { |
| if (isDirect()) { |
| if (Options::verboseOSR()) { |
| dataLog( |
| "Clearing call to ", RawPointer(codeBlock()), " (", |
| pointerDump(codeBlock()), ").\n"); |
| } |
| } else { |
| if (callee()->type() == JSFunctionType) { |
| if (Options::verboseOSR()) { |
| dataLog( |
| "Clearing call to ", |
| RawPointer(callee()), " (", |
| static_cast<JSFunction*>(callee())->executable()->hashFor(specializationKind()), |
| ").\n"); |
| } |
| handleSpecificCallee(static_cast<JSFunction*>(callee())); |
| } else { |
| if (Options::verboseOSR()) |
| dataLog("Clearing call to ", RawPointer(callee()), ".\n"); |
| m_clearedByGC = true; |
| } |
| } |
| unlink(vm); |
| } else if (isDirect() && !Heap::isMarked(m_lastSeenCalleeOrExecutable.get())) { |
| if (Options::verboseOSR()) { |
| dataLog( |
| "Clearing call to ", RawPointer(executable()), |
| " because the executable is dead.\n"); |
| } |
| unlink(vm); |
| // We should only get here once the owning CodeBlock is dying, since the executable must |
| // already be in the owner's weak references. |
| m_lastSeenCalleeOrExecutable.clear(); |
| } |
| } |
| if (!isDirect() && haveLastSeenCallee() && !Heap::isMarked(lastSeenCallee())) { |
| if (lastSeenCallee()->type() == JSFunctionType) |
| handleSpecificCallee(jsCast<JSFunction*>(lastSeenCallee())); |
| else |
| m_clearedByGC = true; |
| clearLastSeenCallee(); |
| } |
| } |
| |
| void CallLinkInfo::setFrameShuffleData(const CallFrameShuffleData& shuffleData) |
| { |
| m_frameShuffleData = std::make_unique<CallFrameShuffleData>(shuffleData); |
| } |
| |
| } // namespace JSC |
| #endif // ENABLE(JIT) |
| |
