C++ dataLog函数代码示例

void VM::throwException(ExecState* exec, Exception* exception)
{
    if (Options::breakOnThrow()) {
        dataLog("In call frame ", RawPointer(exec), " for code block ", *exec->codeBlock(), "\n");
        CRASH();
    }

    ASSERT(exec == topCallFrame || exec == exec->lexicalGlobalObject()->globalExec() || exec == exec->vmEntryGlobalObject()->globalExec());

    interpreter->notifyDebuggerOfExceptionToBeThrown(exec, exception);

    setException(exception);
}

static const char *symbolLookupCallback(
    void* opaque, uint64_t referenceValue, uint64_t* referenceType, uint64_t referencePC,
    const char** referenceName)
{
    // Set this if you want to debug an unexpected reference type. Currently we only encounter these
    // if we try to disassemble garbage, since our code generator never uses them. These include things
    // like PC-relative references.
    static const bool crashOnUnexpected = false;
    
    char* symbolString = static_cast<char*>(opaque);
    
    switch (*referenceType) {
    case LLVMDisassembler_ReferenceType_InOut_None:
        return 0;
    case LLVMDisassembler_ReferenceType_In_Branch:
        *referenceName = 0;
        *referenceType = LLVMDisassembler_ReferenceType_InOut_None;
        snprintf(
            symbolString, symbolStringSize, "0x%lx",
            static_cast<unsigned long>(referenceValue));
        return symbolString;
    default:
        if (crashOnUnexpected) {
            dataLog("referenceValue = ", referenceValue, "\n");
            dataLog("referenceType = ", RawPointer(referenceType), ", *referenceType = ", *referenceType, "\n");
            dataLog("referencePC = ", referencePC, "\n");
            dataLog("referenceName = ", RawPointer(referenceName), "\n");
            
            RELEASE_ASSERT_NOT_REACHED();
        }
        
        *referenceName = "unimplemented reference type!";
        *referenceType = LLVMDisassembler_ReferenceType_InOut_None;
        snprintf(
            symbolString, symbolStringSize, "unimplemented:0x%lx",
            static_cast<unsigned long>(referenceValue));
        return symbolString;
    }
}

void Worklist::enqueue(PassRefPtr<Plan> passedPlan)
{
    RefPtr<Plan> plan = passedPlan;
    MutexLocker locker(m_lock);
    if (Options::verboseCompilationQueue()) {
        dump(locker, WTF::dataFile());
        dataLog(": Enqueueing plan to optimize ", plan->key(), "\n");
    }
    ASSERT(m_plans.find(plan->key()) == m_plans.end());
    m_plans.add(plan->key(), plan);
    m_queue.append(plan);
    m_planEnqueued.signal();
}

void JITToDFGDeferredCompilationCallback::compilationDidComplete(
    CodeBlock* codeBlock, CompilationResult result)
{
    ASSERT(codeBlock->alternative()->jitType() == JITCode::BaselineJIT);
    
    if (Options::verboseOSR())
        dataLog("Optimizing compilation of ", *codeBlock, " result: ", result, "\n");
    
    if (result == CompilationSuccessful)
        codeBlock->install();
    
    codeBlock->alternative()->setOptimizationThresholdBasedOnCompilationResult(result);
}

    void coalesce()
    {
        unsigned moveIndex = m_worklistMoves.takeLastMove();
        const MoveOperands& moveOperands = m_coalescingCandidates[moveIndex];
        IndexType u = getAlias(moveOperands.srcIndex);
        IndexType v = getAlias(moveOperands.dstIndex);

        if (isPrecolored(v))
            std::swap(u, v);

        if (traceDebug)
            dataLog("Coalescing move at index", moveIndex, " u = ", u, " v = ", v, "\n");

        if (u == v) {
            addWorkList(u);

            if (traceDebug)
                dataLog("    Coalesced\n");
        } else if (isPrecolored(v) || m_interferenceEdges.contains(InterferenceEdge(u, v))) {
            addWorkList(u);
            addWorkList(v);

            if (traceDebug)
                dataLog("    Constrained\n");
        } else if (canBeSafelyCoalesced(u, v)) {
            combine(u, v);
            addWorkList(u);
            m_hasCoalescedNonTrivialMove = true;

            if (traceDebug)
                dataLog("    Safe Coalescing\n");
        } else {
            m_activeMoves.quickSet(moveIndex);

            if (traceDebug)
                dataLog("    Failed coalescing, added to active moves.\n");
        }
    }

void CallLinkInfo::visitWeak(RepatchBuffer& repatchBuffer)
{
    auto handleSpecificCallee = [&] (JSFunction* callee) {
        if (Heap::isMarked(callee->executable()))
            m_hasSeenClosure = true;
        else
            m_clearedByGC = true;
    };
    
    if (isLinked()) {
        if (stub()) {
            if (!stub()->visitWeak(repatchBuffer)) {
                if (Options::verboseOSR()) {
                    dataLog(
                        "Clearing closure call from ", *repatchBuffer.codeBlock(), " to ",
                        listDump(stub()->variants()), ", stub routine ", RawPointer(stub()),
                        ".\n");
                }
                unlink(repatchBuffer);
                m_clearedByGC = true;
            }
        } else if (!Heap::isMarked(m_callee.get())) {
            if (Options::verboseOSR()) {
                dataLog(
                    "Clearing call from ", *repatchBuffer.codeBlock(), " to ",
                    RawPointer(m_callee.get()), " (",
                    m_callee.get()->executable()->hashFor(specializationKind()),
                    ").\n");
            }
            handleSpecificCallee(m_callee.get());
            unlink(repatchBuffer);
        }
    }
    if (haveLastSeenCallee() && !Heap::isMarked(lastSeenCallee())) {
        handleSpecificCallee(lastSeenCallee());
        clearLastSeenCallee();
    }
}

int main(int argc, char** argv)
{
    WTF::initializeThreading();
    
    if (argc != 8
        || !parseValue(argv[2], &numThreadGroups)
        || !parseValue(argv[3], &numThreadsPerGroup)
        || !parseValue(argv[4], &workPerCriticalSection)
        || !parseValue(argv[5], &workBetweenCriticalSections)
        || !parseValue(argv[6], &toyLockSpinLimit)
        || sscanf(argv[7], "%lf", &secondsPerTest) != 1)
        usage();
    
    if (rangeVariable) {
        dataLog("Running with rangeMin = ", rangeMin, ", rangeMax = ", rangeMax, ", rangeStep = ", rangeStep, "\n");
        for (unsigned value = rangeMin; value <= rangeMax; value += rangeStep) {
            dataLog("Running with value = ", value, "\n");
            *rangeVariable = value;
            runEverything<Benchmark>(argv[1]);
        }
    } else
        runEverything<Benchmark>(argv[1]);
    
    for (auto& entry : results) {
        printf("%s = {", entry.key.data());
        bool first = true;
        for (double value : entry.value) {
            if (first)
                first = false;
            else
                printf(", ");
            printf("%.3lf", value);
        }
        printf("};\n");
    }

    return 0;
}

JSValue ModuleLoaderObject::evaluate(ExecState* exec, JSValue key, JSValue moduleRecordValue)
{
    if (Options::dumpModuleLoadingState())
        dataLog("Loader [evaluate] ", printableModuleKey(exec, key), "\n");

    JSGlobalObject* globalObject = exec->lexicalGlobalObject();
    if (globalObject->globalObjectMethodTable()->moduleLoaderEvaluate)
        return globalObject->globalObjectMethodTable()->moduleLoaderEvaluate(globalObject, exec, key, moduleRecordValue);

    JSModuleRecord* moduleRecord = jsDynamicCast<JSModuleRecord*>(moduleRecordValue);
    if (!moduleRecord)
        return jsUndefined();
    return moduleRecord->evaluate(exec);
}

void Heap::visitException(HeapRootVisitor& visitor)
{
    GCPHASE(MarkingException);
    if (!m_vm->exception() && !m_vm->lastException())
        return;

    visitor.visit(m_vm->addressOfException());
    visitor.visit(m_vm->addressOfLastException());

    if (Options::logGC() == GCLogging::Verbose)
        dataLog("Exceptions:\n", m_slotVisitor);

    m_slotVisitor.donateAndDrain();
}

void BlockDirectory::stopAllocatingForGood()
{
    if (false)
        dataLog(RawPointer(this), ": BlockDirectory::stopAllocatingForGood!\n");
    
    m_localAllocators.forEach(
        [&] (LocalAllocator* allocator) {
            allocator->stopAllocatingForGood();
        });

    auto locker = holdLock(m_localAllocatorsLock);
    while (!m_localAllocators.isEmpty())
        m_localAllocators.begin()->remove();
}

void BytecodeLivenessAnalysis::dumpResults()
{
    CodeBlock* codeBlock = m_graph.codeBlock();
    dataLog("\nDumping bytecode liveness for ", *codeBlock, ":\n");
    Interpreter* interpreter = codeBlock->vm()->interpreter;
    Instruction* instructionsBegin = codeBlock->instructions().begin();
    unsigned i = 0;
    for (BytecodeBasicBlock* block : m_graph) {
        dataLogF("\nBytecode basic block %u: %p (offset: %u, length: %u)\n", i++, block, block->leaderOffset(), block->totalLength());
        dataLogF("Successors: ");
        for (unsigned j = 0; j < block->successors().size(); j++) {
            BytecodeBasicBlock* successor = block->successors()[j];
            dataLogF("%p ", successor);
        }
        dataLogF("\n");
        if (block->isEntryBlock()) {
            dataLogF("Entry block %p\n", block);
            continue;
        }
        if (block->isExitBlock()) {
            dataLogF("Exit block: %p\n", block);
            continue;
        }
        for (unsigned bytecodeOffset = block->leaderOffset(); bytecodeOffset < block->leaderOffset() + block->totalLength();) {
            const Instruction* currentInstruction = &instructionsBegin[bytecodeOffset];

            dataLogF("Live variables: ");
            FastBitVector liveBefore = getLivenessInfoAtBytecodeOffset(bytecodeOffset);
            for (unsigned j = 0; j < liveBefore.numBits(); j++) {
                if (liveBefore.get(j))
                    dataLogF("%u ", j);
            }
            dataLogF("\n");
            codeBlock->dumpBytecode(WTF::dataFile(), codeBlock->globalObject()->globalExec(), instructionsBegin, currentInstruction);

            OpcodeID opcodeID = interpreter->getOpcodeID(instructionsBegin[bytecodeOffset].u.opcode);
            unsigned opcodeLength = opcodeLengths[opcodeID];
            bytecodeOffset += opcodeLength;
        }

        dataLogF("Live variables: ");
        FastBitVector liveAfter = block->out();
        for (unsigned j = 0; j < liveAfter.numBits(); j++) {
            if (liveAfter.get(j))
                dataLogF("%u ", j);
        }
        dataLogF("\n");
    }
}

void ArrayProfile::computeUpdatedPrediction(CodeBlock* codeBlock, OperationInProgress operation)
{
    const bool verbose = false;
    
    if (m_lastSeenStructure) {
        m_observedArrayModes |= arrayModeFromStructure(m_lastSeenStructure);
        m_mayInterceptIndexedAccesses |=
            m_lastSeenStructure->typeInfo().interceptsGetOwnPropertySlotByIndexEvenWhenLengthIsNotZero();
        if (!codeBlock->globalObject()->isOriginalArrayStructure(m_lastSeenStructure))
            m_usesOriginalArrayStructures = false;
        if (!structureIsPolymorphic()) {
            if (!m_expectedStructure)
                m_expectedStructure = m_lastSeenStructure;
            else if (m_expectedStructure != m_lastSeenStructure) {
                if (verbose)
                    dataLog(*codeBlock, " bc#", m_bytecodeOffset, ": making structure polymorphic because ", RawPointer(m_expectedStructure), " (", m_expectedStructure->classInfo()->className, ") != ", RawPointer(m_lastSeenStructure), " (", m_lastSeenStructure->classInfo()->className, ")\n");
                m_expectedStructure = polymorphicStructure();
            }
        }
        m_lastSeenStructure = 0;
    }
    
    if (hasTwoOrMoreBitsSet(m_observedArrayModes)) {
        if (verbose)
            dataLog(*codeBlock, " bc#", m_bytecodeOffset, ": making structure polymorphic because two or more bits are set in m_observedArrayModes\n");
        m_expectedStructure = polymorphicStructure();
    }
    
    if (operation == Collection
        && expectedStructure()
        && !Heap::isMarked(m_expectedStructure)) {
        if (verbose)
            dataLog(*codeBlock, " bc#", m_bytecodeOffset, ": making structure during GC\n");
        m_expectedStructure = polymorphicStructure();
    }
}

EncodedJSValue JSC_HOST_CALL moduleLoaderObjectModuleDeclarationInstantiation(ExecState* exec)
{
    JSModuleRecord* moduleRecord = jsDynamicCast<JSModuleRecord*>(exec->argument(0));
    if (!moduleRecord)
        return JSValue::encode(jsUndefined());

    if (Options::dumpModuleLoadingState())
        dataLog("Loader [link] ", moduleRecord->moduleKey(), "\n");

    moduleRecord->link(exec);
    if (exec->hadException())
        return JSValue::encode(jsUndefined());

    return JSValue::encode(jsUndefined());
}

EncodedJSValue JSC_HOST_CALL moduleLoaderPrototypeModuleDeclarationInstantiation(ExecState* exec)
{
    VM& vm = exec->vm();
    auto scope = DECLARE_THROW_SCOPE(vm);
    JSModuleRecord* moduleRecord = jsDynamicCast<JSModuleRecord*>(vm, exec->argument(0));
    if (!moduleRecord)
        return JSValue::encode(jsUndefined());

    if (Options::dumpModuleLoadingState())
        dataLog("Loader [link] ", moduleRecord->moduleKey(), "\n");

    moduleRecord->link(exec);
    RETURN_IF_EXCEPTION(scope, encodedJSValue());

    return JSValue::encode(jsUndefined());
}

void ToFTLForOSREntryDeferredCompilationCallback::compilationDidComplete(
    CodeBlock* codeBlock, CompilationResult result)
{
    if (Options::verboseOSR()) {
        dataLog(
            "Optimizing compilation of ", *codeBlock, " (for ", *m_dfgCodeBlock,
            ") result: ", result, "\n");
    }

    if (result == CompilationSuccessful)
        m_dfgCodeBlock->jitCode()->dfg()->osrEntryBlock = codeBlock;

    // FIXME: if we failed, we might want to just turn off OSR entry rather than
    // totally turning off tier-up.
    m_dfgCodeBlock->jitCode()->dfg()->setOptimizationThresholdBasedOnCompilationResult(
        m_dfgCodeBlock.get(), result);
}