| /* |
| * Copyright (C) 2019-2021 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 "WasmOperations.h" |
| |
| #if ENABLE(WEBASSEMBLY) |
| |
| #include "ButterflyInlines.h" |
| #include "FrameTracers.h" |
| #include "IteratorOperations.h" |
| #include "JITExceptions.h" |
| #include "JSCJSValueInlines.h" |
| #include "JSGlobalObjectInlines.h" |
| #include "JSWebAssemblyException.h" |
| #include "JSWebAssemblyHelpers.h" |
| #include "JSWebAssemblyInstance.h" |
| #include "JSWebAssemblyRuntimeError.h" |
| #include "ProbeContext.h" |
| #include "ReleaseHeapAccessScope.h" |
| #include "TypedArrayController.h" |
| #include "WasmCallee.h" |
| #include "WasmCallingConvention.h" |
| #include "WasmContextInlines.h" |
| #include "WasmInstance.h" |
| #include "WasmMemory.h" |
| #include "WasmModuleInformation.h" |
| #include "WasmOMGForOSREntryPlan.h" |
| #include "WasmOMGPlan.h" |
| #include "WasmOSREntryData.h" |
| #include "WasmWorklist.h" |
| #include <wtf/CheckedArithmetic.h> |
| #include <wtf/DataLog.h> |
| #include <wtf/Locker.h> |
| #include <wtf/StdLibExtras.h> |
| |
| IGNORE_WARNINGS_BEGIN("frame-address") |
| |
| namespace JSC { namespace Wasm { |
| |
| #if ENABLE(WEBASSEMBLY_B3JIT) |
| static bool shouldTriggerOMGCompile(TierUpCount& tierUp, OMGCallee* replacement, uint32_t functionIndex) |
| { |
| if (!replacement && !tierUp.checkIfOptimizationThresholdReached()) { |
| dataLogLnIf(Options::verboseOSR(), "delayOMGCompile counter = ", tierUp, " for ", functionIndex); |
| dataLogLnIf(Options::verboseOSR(), "Choosing not to OMG-optimize ", functionIndex, " yet."); |
| return false; |
| } |
| return true; |
| } |
| |
| static void triggerOMGReplacementCompile(TierUpCount& tierUp, OMGCallee* replacement, Instance* instance, Wasm::CodeBlock& codeBlock, uint32_t functionIndex) |
| { |
| if (replacement) { |
| tierUp.optimizeSoon(functionIndex); |
| return; |
| } |
| |
| bool compile = false; |
| { |
| Locker locker { tierUp.getLock() }; |
| switch (tierUp.m_compilationStatusForOMG) { |
| case TierUpCount::CompilationStatus::StartCompilation: |
| tierUp.setOptimizationThresholdBasedOnCompilationResult(functionIndex, CompilationDeferred); |
| return; |
| case TierUpCount::CompilationStatus::NotCompiled: |
| compile = true; |
| tierUp.m_compilationStatusForOMG = TierUpCount::CompilationStatus::StartCompilation; |
| break; |
| default: |
| break; |
| } |
| } |
| |
| if (compile) { |
| dataLogLnIf(Options::verboseOSR(), "triggerOMGReplacement for ", functionIndex); |
| // We need to compile the code. |
| Ref<Plan> plan = adoptRef(*new OMGPlan(instance->context(), Ref<Wasm::Module>(instance->module()), functionIndex, codeBlock.mode(), Plan::dontFinalize())); |
| ensureWorklist().enqueue(plan.copyRef()); |
| if (UNLIKELY(!Options::useConcurrentJIT())) |
| plan->waitForCompletion(); |
| else |
| tierUp.setOptimizationThresholdBasedOnCompilationResult(functionIndex, CompilationDeferred); |
| } |
| } |
| |
| void loadValuesIntoBuffer(Probe::Context& context, const StackMap& values, uint64_t* buffer) |
| { |
| for (unsigned index = 0; index < values.size(); ++index) { |
| const OSREntryValue& value = values[index]; |
| dataLogLnIf(Options::verboseOSR(), "OMG OSR entry values[", index, "] ", value.type(), " ", value); |
| if (value.isGPR()) { |
| switch (value.type().kind()) { |
| case B3::Float: |
| case B3::Double: |
| RELEASE_ASSERT_NOT_REACHED(); |
| default: |
| *bitwise_cast<uint64_t*>(buffer + index) = context.gpr(value.gpr()); |
| } |
| } else if (value.isFPR()) { |
| switch (value.type().kind()) { |
| case B3::Float: |
| case B3::Double: |
| *bitwise_cast<double*>(buffer + index) = context.fpr(value.fpr()); |
| break; |
| default: |
| RELEASE_ASSERT_NOT_REACHED(); |
| } |
| } else if (value.isConstant()) { |
| switch (value.type().kind()) { |
| case B3::Float: |
| *bitwise_cast<float*>(buffer + index) = value.floatValue(); |
| break; |
| case B3::Double: |
| *bitwise_cast<double*>(buffer + index) = value.doubleValue(); |
| break; |
| default: |
| *bitwise_cast<uint64_t*>(buffer + index) = value.value(); |
| } |
| } else if (value.isStack()) { |
| switch (value.type().kind()) { |
| case B3::Float: |
| *bitwise_cast<float*>(buffer + index) = *bitwise_cast<float*>(bitwise_cast<uint8_t*>(context.fp()) + value.offsetFromFP()); |
| break; |
| case B3::Double: |
| *bitwise_cast<double*>(buffer + index) = *bitwise_cast<double*>(bitwise_cast<uint8_t*>(context.fp()) + value.offsetFromFP()); |
| break; |
| default: |
| *bitwise_cast<uint64_t*>(buffer + index) = *bitwise_cast<uint64_t*>(bitwise_cast<uint8_t*>(context.fp()) + value.offsetFromFP()); |
| break; |
| } |
| } else |
| RELEASE_ASSERT_NOT_REACHED(); |
| } |
| } |
| |
| SUPPRESS_ASAN |
| static void doOSREntry(Instance* instance, Probe::Context& context, BBQCallee& callee, OMGForOSREntryCallee& osrEntryCallee, OSREntryData& osrEntryData) |
| { |
| auto returnWithoutOSREntry = [&] { |
| context.gpr(GPRInfo::argumentGPR0) = 0; |
| }; |
| |
| RELEASE_ASSERT(osrEntryCallee.osrEntryScratchBufferSize() == osrEntryData.values().size()); |
| |
| uint64_t* buffer = instance->context()->scratchBufferForSize(osrEntryCallee.osrEntryScratchBufferSize()); |
| if (!buffer) |
| return returnWithoutOSREntry(); |
| |
| dataLogLnIf(Options::verboseOSR(), osrEntryData.functionIndex(), ":OMG OSR entry: got entry callee ", RawPointer(&osrEntryCallee)); |
| |
| // 1. Place required values in scratch buffer. |
| loadValuesIntoBuffer(context, osrEntryData.values(), buffer); |
| |
| // 2. Restore callee saves. |
| RegisterSet dontRestoreRegisters = RegisterSet::stackRegisters(); |
| for (const RegisterAtOffset& entry : *callee.calleeSaveRegisters()) { |
| if (dontRestoreRegisters.get(entry.reg())) |
| continue; |
| if (entry.reg().isGPR()) |
| context.gpr(entry.reg().gpr()) = *bitwise_cast<UCPURegister*>(bitwise_cast<uint8_t*>(context.fp()) + entry.offset()); |
| else |
| context.fpr(entry.reg().fpr()) = *bitwise_cast<double*>(bitwise_cast<uint8_t*>(context.fp()) + entry.offset()); |
| } |
| |
| // 3. Function epilogue, like a tail-call. |
| UCPURegister* framePointer = bitwise_cast<UCPURegister*>(context.fp()); |
| #if CPU(X86_64) |
| // move(framePointerRegister, stackPointerRegister); |
| // pop(framePointerRegister); |
| context.fp() = bitwise_cast<UCPURegister*>(*framePointer); |
| context.sp() = framePointer + 1; |
| static_assert(AssemblyHelpers::prologueStackPointerDelta() == sizeof(void*) * 1); |
| #elif CPU(ARM64E) || CPU(ARM64) |
| // move(framePointerRegister, stackPointerRegister); |
| // popPair(framePointerRegister, linkRegister); |
| context.fp() = bitwise_cast<UCPURegister*>(*framePointer); |
| context.gpr(ARM64Registers::lr) = bitwise_cast<UCPURegister>(*(framePointer + 1)); |
| context.sp() = framePointer + 2; |
| static_assert(AssemblyHelpers::prologueStackPointerDelta() == sizeof(void*) * 2); |
| #if CPU(ARM64E) |
| // LR needs to be untagged since OSR entry function prologue will tag it with SP. This is similar to tail-call. |
| context.gpr(ARM64Registers::lr) = bitwise_cast<UCPURegister>(untagCodePtrWithStackPointerForJITCall(context.gpr<void*>(ARM64Registers::lr), context.sp())); |
| #endif |
| #else |
| #error Unsupported architecture. |
| #endif |
| // 4. Configure argument registers to jump to OSR entry from the caller of this runtime function. |
| context.gpr(GPRInfo::argumentGPR0) = bitwise_cast<UCPURegister>(buffer); |
| context.gpr(GPRInfo::argumentGPR1) = bitwise_cast<UCPURegister>(osrEntryCallee.entrypoint().executableAddress<>()); |
| } |
| |
| inline bool shouldJIT(unsigned functionIndex) |
| { |
| if (!Options::useOMGJIT()) |
| return false; |
| if (!Options::wasmFunctionIndexRangeToCompile().isInRange(functionIndex)) |
| return false; |
| return true; |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationWasmTriggerOSREntryNow, void, (Probe::Context& context)) |
| { |
| OSREntryData& osrEntryData = *context.arg<OSREntryData*>(); |
| uint32_t functionIndex = osrEntryData.functionIndex(); |
| uint32_t loopIndex = osrEntryData.loopIndex(); |
| Instance* instance = Wasm::Context::tryLoadInstanceFromTLS(); |
| if (!instance) |
| instance = context.gpr<Instance*>(Wasm::PinnedRegisterInfo::get().wasmContextInstancePointer); |
| |
| auto returnWithoutOSREntry = [&] { |
| context.gpr(GPRInfo::argumentGPR0) = 0; |
| }; |
| |
| Wasm::CodeBlock& codeBlock = *instance->codeBlock(); |
| ASSERT(instance->memory()->mode() == codeBlock.mode()); |
| |
| uint32_t functionIndexInSpace = functionIndex + codeBlock.functionImportCount(); |
| ASSERT(codeBlock.wasmBBQCalleeFromFunctionIndexSpace(functionIndexInSpace).compilationMode() == Wasm::CompilationMode::BBQMode); |
| BBQCallee& callee = static_cast<BBQCallee&>(codeBlock.wasmBBQCalleeFromFunctionIndexSpace(functionIndexInSpace)); |
| TierUpCount& tierUp = *callee.tierUpCount(); |
| |
| if (!shouldJIT(functionIndex)) { |
| tierUp.deferIndefinitely(); |
| return returnWithoutOSREntry(); |
| } |
| |
| dataLogLnIf(Options::verboseOSR(), "Consider OMGForOSREntryPlan for [", functionIndex, "] loopIndex#", loopIndex, " with executeCounter = ", tierUp, " ", RawPointer(callee.replacement())); |
| |
| if (!Options::useWebAssemblyOSR()) { |
| if (shouldTriggerOMGCompile(tierUp, callee.replacement(), functionIndex)) |
| triggerOMGReplacementCompile(tierUp, callee.replacement(), instance, codeBlock, functionIndex); |
| |
| // We already have an OMG replacement. |
| if (callee.replacement()) { |
| // No OSR entry points. Just defer indefinitely. |
| if (tierUp.osrEntryTriggers().isEmpty()) { |
| tierUp.dontOptimizeAnytimeSoon(functionIndex); |
| return; |
| } |
| |
| // Found one OSR entry point. Since we do not have a way to jettison Wasm::Callee right now, this means that tierUp function is now meaningless. |
| // Not call it as much as possible. |
| if (callee.osrEntryCallee()) { |
| tierUp.dontOptimizeAnytimeSoon(functionIndex); |
| return; |
| } |
| } |
| return returnWithoutOSREntry(); |
| } |
| |
| TierUpCount::CompilationStatus compilationStatus = TierUpCount::CompilationStatus::NotCompiled; |
| { |
| Locker locker { tierUp.getLock() }; |
| compilationStatus = tierUp.m_compilationStatusForOMGForOSREntry; |
| } |
| |
| bool triggeredSlowPathToStartCompilation = false; |
| switch (tierUp.osrEntryTriggers()[loopIndex]) { |
| case TierUpCount::TriggerReason::DontTrigger: |
| // The trigger isn't set, we entered because the counter reached its |
| // threshold. |
| break; |
| case TierUpCount::TriggerReason::CompilationDone: |
| // The trigger was set because compilation completed. Don't unset it |
| // so that further BBQ executions OSR enter as well. |
| break; |
| case TierUpCount::TriggerReason::StartCompilation: { |
| // We were asked to enter as soon as possible and start compiling an |
| // entry for the current loopIndex. Unset this trigger so we |
| // don't continually enter. |
| Locker locker { tierUp.getLock() }; |
| TierUpCount::TriggerReason reason = tierUp.osrEntryTriggers()[loopIndex]; |
| if (reason == TierUpCount::TriggerReason::StartCompilation) { |
| tierUp.osrEntryTriggers()[loopIndex] = TierUpCount::TriggerReason::DontTrigger; |
| triggeredSlowPathToStartCompilation = true; |
| } |
| break; |
| } |
| } |
| |
| if (compilationStatus == TierUpCount::CompilationStatus::StartCompilation) { |
| dataLogLnIf(Options::verboseOSR(), "delayOMGCompile still compiling for ", functionIndex); |
| tierUp.setOptimizationThresholdBasedOnCompilationResult(functionIndex, CompilationDeferred); |
| return returnWithoutOSREntry(); |
| } |
| |
| if (OMGForOSREntryCallee* osrEntryCallee = callee.osrEntryCallee()) { |
| if (osrEntryCallee->loopIndex() == loopIndex) |
| return doOSREntry(instance, context, callee, *osrEntryCallee, osrEntryData); |
| } |
| |
| if (!shouldTriggerOMGCompile(tierUp, callee.replacement(), functionIndex) && !triggeredSlowPathToStartCompilation) |
| return returnWithoutOSREntry(); |
| |
| if (!triggeredSlowPathToStartCompilation) { |
| triggerOMGReplacementCompile(tierUp, callee.replacement(), instance, codeBlock, functionIndex); |
| |
| if (!callee.replacement()) |
| return returnWithoutOSREntry(); |
| } |
| |
| if (OMGForOSREntryCallee* osrEntryCallee = callee.osrEntryCallee()) { |
| if (osrEntryCallee->loopIndex() == loopIndex) |
| return doOSREntry(instance, context, callee, *osrEntryCallee, osrEntryData); |
| tierUp.dontOptimizeAnytimeSoon(functionIndex); |
| return returnWithoutOSREntry(); |
| } |
| |
| // Instead of triggering OSR entry compilation in inner loop, try outer loop's trigger immediately effective (setting TriggerReason::StartCompilation) and |
| // let outer loop attempt to compile. |
| if (!triggeredSlowPathToStartCompilation) { |
| // An inner loop didn't specifically ask for us to kick off a compilation. This means the counter |
| // crossed its threshold. We either fall through and kick off a compile for originBytecodeIndex, |
| // or we flag an outer loop to immediately try to compile itself. If there are outer loops, |
| // we first try to make them compile themselves. But we will eventually fall back to compiling |
| // a progressively inner loop if it takes too long for control to reach an outer loop. |
| |
| auto tryTriggerOuterLoopToCompile = [&] { |
| // We start with the outermost loop and make our way inwards (hence why we iterate the vector in reverse). |
| // Our policy is that we will trigger an outer loop to compile immediately when program control reaches it. |
| // If program control is taking too long to reach that outer loop, we progressively move inwards, meaning, |
| // we'll eventually trigger some loop that is executing to compile. We start with trying to compile outer |
| // loops since we believe outer loop compilations reveal the best opportunities for optimizing code. |
| uint32_t currentLoopIndex = tierUp.outerLoops()[loopIndex]; |
| Locker locker { tierUp.getLock() }; |
| |
| // We already started OMGForOSREntryPlan. |
| if (callee.didStartCompilingOSREntryCallee()) |
| return false; |
| |
| while (currentLoopIndex != UINT32_MAX) { |
| if (tierUp.osrEntryTriggers()[currentLoopIndex] == TierUpCount::TriggerReason::StartCompilation) { |
| // This means that we already asked this loop to compile. If we've reached here, it |
| // means program control has not yet reached that loop. So it's taking too long to compile. |
| // So we move on to asking the inner loop of this loop to compile itself. |
| currentLoopIndex = tierUp.outerLoops()[currentLoopIndex]; |
| continue; |
| } |
| |
| // This is where we ask the outer to loop to immediately compile itself if program |
| // control reaches it. |
| dataLogLnIf(Options::verboseOSR(), "Inner-loop loopIndex#", loopIndex, " in ", functionIndex, " setting parent loop loopIndex#", currentLoopIndex, "'s trigger and backing off."); |
| tierUp.osrEntryTriggers()[currentLoopIndex] = TierUpCount::TriggerReason::StartCompilation; |
| return true; |
| } |
| return false; |
| }; |
| |
| if (tryTriggerOuterLoopToCompile()) { |
| tierUp.setOptimizationThresholdBasedOnCompilationResult(functionIndex, CompilationDeferred); |
| return returnWithoutOSREntry(); |
| } |
| } |
| |
| bool startOSREntryCompilation = false; |
| { |
| Locker locker { tierUp.getLock() }; |
| if (tierUp.m_compilationStatusForOMGForOSREntry == TierUpCount::CompilationStatus::NotCompiled) { |
| tierUp.m_compilationStatusForOMGForOSREntry = TierUpCount::CompilationStatus::StartCompilation; |
| startOSREntryCompilation = true; |
| // Currently, we do not have a way to jettison wasm code. This means that once we decide to compile OSR entry code for a particular loopIndex, |
| // we cannot throw the compiled code so long as Wasm module is live. We immediately disable all the triggers. |
| for (auto& trigger : tierUp.osrEntryTriggers()) |
| trigger = TierUpCount::TriggerReason::DontTrigger; |
| } |
| } |
| |
| if (startOSREntryCompilation) { |
| dataLogLnIf(Options::verboseOSR(), "triggerOMGOSR for ", functionIndex); |
| Ref<Plan> plan = adoptRef(*new OMGForOSREntryPlan(instance->context(), Ref<Wasm::Module>(instance->module()), Ref<Wasm::BBQCallee>(callee), functionIndex, loopIndex, codeBlock.mode(), Plan::dontFinalize())); |
| ensureWorklist().enqueue(plan.copyRef()); |
| if (UNLIKELY(!Options::useConcurrentJIT())) |
| plan->waitForCompletion(); |
| else |
| tierUp.setOptimizationThresholdBasedOnCompilationResult(functionIndex, CompilationDeferred); |
| } |
| |
| OMGForOSREntryCallee* osrEntryCallee = callee.osrEntryCallee(); |
| if (!osrEntryCallee) { |
| tierUp.setOptimizationThresholdBasedOnCompilationResult(functionIndex, CompilationDeferred); |
| return returnWithoutOSREntry(); |
| } |
| |
| if (osrEntryCallee->loopIndex() == loopIndex) |
| return doOSREntry(instance, context, callee, *osrEntryCallee, osrEntryData); |
| |
| tierUp.dontOptimizeAnytimeSoon(functionIndex); |
| return returnWithoutOSREntry(); |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationWasmTriggerTierUpNow, void, (Instance* instance, uint32_t functionIndex)) |
| { |
| Wasm::CodeBlock& codeBlock = *instance->codeBlock(); |
| ASSERT(instance->memory()->mode() == codeBlock.mode()); |
| |
| uint32_t functionIndexInSpace = functionIndex + codeBlock.functionImportCount(); |
| ASSERT(codeBlock.wasmBBQCalleeFromFunctionIndexSpace(functionIndexInSpace).compilationMode() == Wasm::CompilationMode::BBQMode); |
| BBQCallee& callee = static_cast<BBQCallee&>(codeBlock.wasmBBQCalleeFromFunctionIndexSpace(functionIndexInSpace)); |
| TierUpCount& tierUp = *callee.tierUpCount(); |
| |
| if (!shouldJIT(functionIndex)) { |
| tierUp.deferIndefinitely(); |
| return; |
| } |
| |
| dataLogLnIf(Options::verboseOSR(), "Consider OMGPlan for [", functionIndex, "] with executeCounter = ", tierUp, " ", RawPointer(callee.replacement())); |
| |
| if (shouldTriggerOMGCompile(tierUp, callee.replacement(), functionIndex)) |
| triggerOMGReplacementCompile(tierUp, callee.replacement(), instance, codeBlock, functionIndex); |
| |
| // We already have an OMG replacement. |
| if (callee.replacement()) { |
| // No OSR entry points. Just defer indefinitely. |
| if (tierUp.osrEntryTriggers().isEmpty()) { |
| dataLogLnIf(Options::verboseOSR(), "delayOMGCompile replacement in place, delaying indefinitely for ", functionIndex); |
| tierUp.dontOptimizeAnytimeSoon(functionIndex); |
| return; |
| } |
| |
| // Found one OSR entry point. Since we do not have a way to jettison Wasm::Callee right now, this means that tierUp function is now meaningless. |
| // Not call it as much as possible. |
| if (callee.osrEntryCallee()) { |
| dataLogLnIf(Options::verboseOSR(), "delayOMGCompile trigger in place, delaying indefinitely for ", functionIndex); |
| tierUp.dontOptimizeAnytimeSoon(functionIndex); |
| return; |
| } |
| } |
| } |
| #endif |
| |
| JSC_DEFINE_JIT_OPERATION(operationWasmUnwind, void, (CallFrame* callFrame)) |
| { |
| // FIXME: Consider passing JSWebAssemblyInstance* instead. |
| // https://bugs.webkit.org/show_bug.cgi?id=203206 |
| VM& vm = callFrame->deprecatedVM(); |
| NativeCallFrameTracer tracer(vm, callFrame); |
| genericUnwind(vm, callFrame); |
| ASSERT(!!vm.callFrameForCatch); |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationConvertToI64, int64_t, (CallFrame* callFrame, JSValue v)) |
| { |
| // FIXME: Consider passing JSWebAssemblyInstance* instead. |
| // https://bugs.webkit.org/show_bug.cgi?id=203206 |
| VM& vm = callFrame->deprecatedVM(); |
| NativeCallFrameTracer tracer(vm, callFrame); |
| return v.toBigInt64(callFrame->lexicalGlobalObject(vm)); |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationConvertToF64, double, (CallFrame* callFrame, JSValue v)) |
| { |
| // FIXME: Consider passing JSWebAssemblyInstance* instead. |
| // https://bugs.webkit.org/show_bug.cgi?id=203206 |
| VM& vm = callFrame->deprecatedVM(); |
| NativeCallFrameTracer tracer(vm, callFrame); |
| return v.toNumber(callFrame->lexicalGlobalObject(vm)); |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationConvertToI32, int32_t, (CallFrame* callFrame, JSValue v)) |
| { |
| // FIXME: Consider passing JSWebAssemblyInstance* instead. |
| // https://bugs.webkit.org/show_bug.cgi?id=203206 |
| VM& vm = callFrame->deprecatedVM(); |
| NativeCallFrameTracer tracer(vm, callFrame); |
| return v.toInt32(callFrame->lexicalGlobalObject(vm)); |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationConvertToF32, float, (CallFrame* callFrame, JSValue v)) |
| { |
| // FIXME: Consider passing JSWebAssemblyInstance* instead. |
| // https://bugs.webkit.org/show_bug.cgi?id=203206 |
| VM& vm = callFrame->deprecatedVM(); |
| NativeCallFrameTracer tracer(vm, callFrame); |
| return static_cast<float>(v.toNumber(callFrame->lexicalGlobalObject(vm))); |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationConvertToBigInt, EncodedJSValue, (CallFrame* callFrame, Instance* instance, int64_t value)) |
| { |
| JSWebAssemblyInstance* jsInstance = instance->owner<JSWebAssemblyInstance>(); |
| JSGlobalObject* globalObject = jsInstance->globalObject(); |
| VM& vm = globalObject->vm(); |
| NativeCallFrameTracer tracer(vm, callFrame); |
| return JSValue::encode(JSBigInt::makeHeapBigIntOrBigInt32(globalObject, value)); |
| } |
| |
| // https://webassembly.github.io/multi-value/js-api/index.html#run-a-host-function |
| JSC_DEFINE_JIT_OPERATION(operationIterateResults, void, (CallFrame* callFrame, Instance* instance, const Signature* signature, JSValue result, uint64_t* registerResults, uint64_t* calleeFramePointer)) |
| { |
| // FIXME: Consider passing JSWebAssemblyInstance* instead. |
| // https://bugs.webkit.org/show_bug.cgi?id=203206 |
| JSWebAssemblyInstance* jsInstance = instance->owner<JSWebAssemblyInstance>(); |
| JSGlobalObject* globalObject = jsInstance->globalObject(); |
| VM& vm = globalObject->vm(); |
| NativeCallFrameTracer(vm, callFrame); |
| auto scope = DECLARE_THROW_SCOPE(vm); |
| |
| auto wasmCallInfo = wasmCallingConvention().callInformationFor(*signature, CallRole::Callee); |
| RegisterAtOffsetList registerResultOffsets = wasmCallInfo.computeResultsOffsetList(); |
| |
| unsigned iterationCount = 0; |
| MarkedArgumentBuffer buffer; |
| forEachInIterable(globalObject, result, [&] (VM&, JSGlobalObject*, JSValue value) -> void { |
| if (buffer.size() < signature->returnCount()) |
| buffer.append(value); |
| ++iterationCount; |
| }); |
| RETURN_IF_EXCEPTION(scope, void()); |
| |
| if (buffer.hasOverflowed()) { |
| throwOutOfMemoryError(globalObject, scope, "JS results to Wasm are too large"); |
| return; |
| } |
| |
| if (iterationCount != signature->returnCount()) { |
| throwVMTypeError(globalObject, scope, "Incorrect number of values returned to Wasm from JS"); |
| return; |
| } |
| |
| for (unsigned index = 0; index < buffer.size(); ++index) { |
| JSValue value = buffer.at(index); |
| |
| uint64_t unboxedValue = 0; |
| switch (signature->returnType(index).kind) { |
| case TypeKind::I32: |
| unboxedValue = value.toInt32(globalObject); |
| break; |
| case TypeKind::I64: |
| unboxedValue = value.toBigInt64(globalObject); |
| break; |
| case TypeKind::F32: |
| unboxedValue = bitwise_cast<uint32_t>(value.toFloat(globalObject)); |
| break; |
| case TypeKind::F64: |
| unboxedValue = bitwise_cast<uint64_t>(value.toNumber(globalObject)); |
| break; |
| case TypeKind::Funcref: |
| if (!value.isCallable(vm)) { |
| throwTypeError(globalObject, scope, "Funcref value is not a function"_s); |
| return; |
| } |
| FALLTHROUGH; |
| case TypeKind::Externref: |
| unboxedValue = bitwise_cast<uint64_t>(value); |
| break; |
| default: |
| RELEASE_ASSERT_NOT_REACHED(); |
| } |
| RETURN_IF_EXCEPTION(scope, void()); |
| |
| auto rep = wasmCallInfo.results[index]; |
| if (rep.isReg()) |
| registerResults[registerResultOffsets.find(rep.reg())->offset() / sizeof(uint64_t)] = unboxedValue; |
| else |
| calleeFramePointer[rep.offsetFromFP() / sizeof(uint64_t)] = unboxedValue; |
| } |
| } |
| |
| // FIXME: It would be much easier to inline this when we have a global GC, which could probably mean we could avoid |
| // spilling the results onto the stack. |
| // Saved result registers should be placed on the stack just above the last stack result. |
| JSC_DEFINE_JIT_OPERATION(operationAllocateResultsArray, JSArray*, (CallFrame* callFrame, Wasm::Instance* instance, const Signature* signature, IndexingType indexingType, JSValue* stackPointerFromCallee)) |
| { |
| JSWebAssemblyInstance* jsInstance = instance->owner<JSWebAssemblyInstance>(); |
| VM& vm = jsInstance->vm(); |
| NativeCallFrameTracer tracer(vm, callFrame); |
| |
| JSGlobalObject* globalObject = jsInstance->globalObject(); |
| ObjectInitializationScope initializationScope(globalObject->vm()); |
| JSArray* result = JSArray::tryCreateUninitializedRestricted(initializationScope, nullptr, globalObject->arrayStructureForIndexingTypeDuringAllocation(indexingType), signature->returnCount()); |
| |
| // FIXME: Handle allocation failure... |
| RELEASE_ASSERT(result); |
| |
| auto wasmCallInfo = wasmCallingConvention().callInformationFor(*signature); |
| RegisterAtOffsetList registerResults = wasmCallInfo.computeResultsOffsetList(); |
| |
| static_assert(sizeof(JSValue) == sizeof(CPURegister), "The code below relies on this."); |
| for (unsigned i = 0; i < signature->returnCount(); ++i) { |
| ValueLocation loc = wasmCallInfo.results[i]; |
| JSValue value; |
| if (loc.isReg()) |
| value = stackPointerFromCallee[(registerResults.find(loc.reg())->offset() + wasmCallInfo.headerAndArgumentStackSizeInBytes) / sizeof(JSValue)]; |
| else |
| value = stackPointerFromCallee[loc.offsetFromSP() / sizeof(JSValue)]; |
| result->initializeIndex(initializationScope, i, value); |
| } |
| |
| ASSERT(result->indexingType() == indexingType); |
| return result; |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationWasmWriteBarrierSlowPath, void, (JSCell* cell, VM* vmPointer)) |
| { |
| ASSERT(cell); |
| ASSERT(vmPointer); |
| VM& vm = *vmPointer; |
| vm.heap.writeBarrierSlowPath(cell); |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationPopcount32, uint32_t, (int32_t value)) |
| { |
| return __builtin_popcount(value); |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationPopcount64, uint64_t, (int64_t value)) |
| { |
| return __builtin_popcountll(value); |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationGrowMemory, int32_t, (void* callFrame, Instance* instance, int32_t delta)) |
| { |
| instance->storeTopCallFrame(callFrame); |
| |
| if (delta < 0) |
| return -1; |
| |
| auto grown = instance->memory()->grow(PageCount(delta)); |
| if (!grown) { |
| switch (grown.error()) { |
| case Memory::GrowFailReason::InvalidDelta: |
| case Memory::GrowFailReason::InvalidGrowSize: |
| case Memory::GrowFailReason::WouldExceedMaximum: |
| case Memory::GrowFailReason::OutOfMemory: |
| return -1; |
| } |
| RELEASE_ASSERT_NOT_REACHED(); |
| } |
| |
| return grown.value().pageCount(); |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationWasmMemoryFill, size_t, (Instance* instance, uint32_t dstAddress, uint32_t targetValue, uint32_t count)) |
| { |
| return instance->memory()->fill(dstAddress, static_cast<uint8_t>(targetValue), count); |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationWasmMemoryCopy, size_t, (Instance* instance, uint32_t dstAddress, uint32_t srcAddress, uint32_t count)) |
| { |
| return instance->memory()->copy(dstAddress, srcAddress, count); |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationGetWasmTableElement, EncodedJSValue, (Instance* instance, unsigned tableIndex, int32_t signedIndex)) |
| { |
| ASSERT(tableIndex < instance->module().moduleInformation().tableCount()); |
| if (signedIndex < 0) |
| return 0; |
| |
| uint32_t index = signedIndex; |
| if (index >= instance->table(tableIndex)->length()) |
| return 0; |
| |
| return JSValue::encode(instance->table(tableIndex)->get(index)); |
| } |
| |
| static bool setWasmTableElement(Instance* instance, unsigned tableIndex, uint32_t index, EncodedJSValue encValue) |
| { |
| ASSERT(tableIndex < instance->module().moduleInformation().tableCount()); |
| |
| if (index >= instance->table(tableIndex)->length()) |
| return false; |
| |
| JSValue value = JSValue::decode(encValue); |
| if (instance->table(tableIndex)->type() == Wasm::TableElementType::Externref) |
| instance->table(tableIndex)->set(index, value); |
| else if (instance->table(tableIndex)->type() == Wasm::TableElementType::Funcref) { |
| WebAssemblyFunction* wasmFunction; |
| WebAssemblyWrapperFunction* wasmWrapperFunction; |
| |
| if (isWebAssemblyHostFunction(instance->owner<JSObject>()->vm(), value, wasmFunction, wasmWrapperFunction)) { |
| ASSERT(!!wasmFunction || !!wasmWrapperFunction); |
| if (wasmFunction) |
| instance->table(tableIndex)->asFuncrefTable()->setFunction(index, jsCast<JSObject*>(value), wasmFunction->importableFunction(), &wasmFunction->instance()->instance()); |
| else |
| instance->table(tableIndex)->asFuncrefTable()->setFunction(index, jsCast<JSObject*>(value), wasmWrapperFunction->importableFunction(), &wasmWrapperFunction->instance()->instance()); |
| } else if (value.isNull()) |
| instance->table(tableIndex)->clear(index); |
| else |
| ASSERT_NOT_REACHED(); |
| } else |
| ASSERT_NOT_REACHED(); |
| |
| return true; |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationSetWasmTableElement, size_t, (Instance* instance, unsigned tableIndex, uint32_t signedIndex, EncodedJSValue encValue)) |
| { |
| return setWasmTableElement(instance, tableIndex, signedIndex, encValue); |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationWasmTableInit, size_t, (Instance* instance, unsigned elementIndex, unsigned tableIndex, uint32_t dstOffset, uint32_t srcOffset, uint32_t length)) |
| { |
| ASSERT(elementIndex < instance->module().moduleInformation().elementCount()); |
| ASSERT(tableIndex < instance->module().moduleInformation().tableCount()); |
| |
| if (WTF::sumOverflows<uint32_t>(srcOffset, length)) |
| return false; |
| |
| if (WTF::sumOverflows<uint32_t>(dstOffset, length)) |
| return false; |
| |
| if (dstOffset + length > instance->table(tableIndex)->length()) |
| return false; |
| |
| const uint32_t lengthOfElementSegment = instance->elementAt(elementIndex) ? instance->elementAt(elementIndex)->length() : 0U; |
| if (srcOffset + length > lengthOfElementSegment) |
| return false; |
| |
| if (!lengthOfElementSegment) |
| return true; |
| |
| instance->tableInit(dstOffset, srcOffset, length, elementIndex, tableIndex); |
| return true; |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationWasmElemDrop, void, (Instance* instance, unsigned elementIndex)) |
| { |
| ASSERT(elementIndex < instance->module().moduleInformation().elementCount()); |
| instance->elemDrop(elementIndex); |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationWasmTableGrow, int32_t, (Instance* instance, unsigned tableIndex, EncodedJSValue fill, uint32_t delta)) |
| { |
| ASSERT(tableIndex < instance->module().moduleInformation().tableCount()); |
| auto oldSize = instance->table(tableIndex)->length(); |
| auto newSize = instance->table(tableIndex)->grow(delta, jsNull()); |
| if (!newSize) |
| return -1; |
| |
| for (unsigned i = oldSize; i < instance->table(tableIndex)->length(); ++i) |
| setWasmTableElement(instance, tableIndex, i, fill); |
| |
| return oldSize; |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationWasmTableFill, size_t, (Instance* instance, unsigned tableIndex, uint32_t offset, EncodedJSValue fill, uint32_t count)) |
| { |
| ASSERT(tableIndex < instance->module().moduleInformation().tableCount()); |
| |
| if (WTF::sumOverflows<uint32_t>(offset, count)) |
| return false; |
| |
| if (offset + count > instance->table(tableIndex)->length()) |
| return false; |
| |
| for (uint32_t index = 0; index < count; ++index) |
| setWasmTableElement(instance, tableIndex, offset + index, fill); |
| |
| return true; |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationWasmTableCopy, size_t, (Instance* instance, unsigned dstTableIndex, unsigned srcTableIndex, int32_t dstOffset, int32_t srcOffset, int32_t length)) |
| { |
| ASSERT(dstTableIndex < instance->module().moduleInformation().tableCount()); |
| ASSERT(srcTableIndex < instance->module().moduleInformation().tableCount()); |
| const Table* dstTable = instance->table(dstTableIndex); |
| const Table* srcTable = instance->table(srcTableIndex); |
| ASSERT(dstTable->type() == srcTable->type()); |
| |
| if ((srcOffset < 0) || (dstOffset < 0) || (length < 0)) |
| return false; |
| |
| CheckedUint32 lastDstElementIndexChecked = static_cast<uint32_t>(dstOffset); |
| lastDstElementIndexChecked += static_cast<uint32_t>(length); |
| |
| if (lastDstElementIndexChecked.hasOverflowed()) |
| return false; |
| |
| if (lastDstElementIndexChecked > dstTable->length()) |
| return false; |
| |
| CheckedUint32 lastSrcElementIndexChecked = static_cast<uint32_t>(srcOffset); |
| lastSrcElementIndexChecked += static_cast<uint32_t>(length); |
| |
| if (lastSrcElementIndexChecked.hasOverflowed()) |
| return false; |
| |
| if (lastSrcElementIndexChecked > srcTable->length()) |
| return false; |
| |
| instance->tableCopy(dstOffset, srcOffset, length, dstTableIndex, srcTableIndex); |
| return true; |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationWasmRefFunc, EncodedJSValue, (Instance* instance, uint32_t index)) |
| { |
| JSValue value = instance->getFunctionWrapper(index); |
| ASSERT(value.isCallable(instance->owner<JSObject>()->vm())); |
| return JSValue::encode(value); |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationGetWasmTableSize, int32_t, (Instance* instance, unsigned tableIndex)) |
| { |
| return instance->table(tableIndex)->length(); |
| } |
| |
| template<typename ValueType> |
| static int32_t wait(VM& vm, ValueType* pointer, ValueType expectedValue, int64_t timeoutInNanoseconds) |
| { |
| Seconds timeout = Seconds::infinity(); |
| if (timeoutInNanoseconds >= 0) { |
| int64_t timeoutInMilliseconds = timeoutInNanoseconds / 1000; |
| timeout = Seconds::fromMilliseconds(timeoutInMilliseconds); |
| } |
| bool didPassValidation = false; |
| ParkingLot::ParkResult result; |
| { |
| ReleaseHeapAccessScope releaseHeapAccessScope(vm.heap); |
| result = ParkingLot::parkConditionally( |
| pointer, |
| [&] () -> bool { |
| didPassValidation = WTF::atomicLoad(pointer) == expectedValue; |
| return didPassValidation; |
| }, |
| [] () { }, |
| MonotonicTime::now() + timeout); |
| } |
| if (!didPassValidation) |
| return 1; |
| if (!result.wasUnparked) |
| return 2; |
| return 0; |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationMemoryAtomicWait32, int32_t, (Instance* instance, unsigned base, unsigned offset, uint32_t value, int64_t timeoutInNanoseconds)) |
| { |
| VM& vm = instance->owner<JSWebAssemblyInstance>()->vm(); |
| uint64_t offsetInMemory = static_cast<uint64_t>(base) + offset; |
| if (offsetInMemory & (0x4 - 1)) |
| return -1; |
| if (!instance->memory()) |
| return -1; |
| if (offsetInMemory >= instance->memory()->size()) |
| return -1; |
| if (instance->memory()->sharingMode() != MemorySharingMode::Shared) |
| return -1; |
| if (!vm.m_typedArrayController->isAtomicsWaitAllowedOnCurrentThread()) |
| return -1; |
| uint32_t* pointer = bitwise_cast<uint32_t*>(bitwise_cast<uint8_t*>(instance->memory()->memory()) + offsetInMemory); |
| return wait<uint32_t>(vm, pointer, value, timeoutInNanoseconds); |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationMemoryAtomicWait64, int32_t, (Instance* instance, unsigned base, unsigned offset, uint64_t value, int64_t timeoutInNanoseconds)) |
| { |
| VM& vm = instance->owner<JSWebAssemblyInstance>()->vm(); |
| uint64_t offsetInMemory = static_cast<uint64_t>(base) + offset; |
| if (offsetInMemory & (0x8 - 1)) |
| return -1; |
| if (!instance->memory()) |
| return -1; |
| if (offsetInMemory >= instance->memory()->size()) |
| return -1; |
| if (instance->memory()->sharingMode() != MemorySharingMode::Shared) |
| return -1; |
| if (!vm.m_typedArrayController->isAtomicsWaitAllowedOnCurrentThread()) |
| return -1; |
| uint64_t* pointer = bitwise_cast<uint64_t*>(bitwise_cast<uint8_t*>(instance->memory()->memory()) + offsetInMemory); |
| return wait<uint64_t>(vm, pointer, value, timeoutInNanoseconds); |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationMemoryAtomicNotify, int32_t, (Instance* instance, unsigned base, unsigned offset, int32_t countValue)) |
| { |
| uint64_t offsetInMemory = static_cast<uint64_t>(base) + offset; |
| if (offsetInMemory & (0x4 - 1)) |
| return -1; |
| if (!instance->memory()) |
| return -1; |
| if (offsetInMemory >= instance->memory()->size()) |
| return -1; |
| if (instance->memory()->sharingMode() != MemorySharingMode::Shared) |
| return 0; |
| uint8_t* pointer = bitwise_cast<uint8_t*>(instance->memory()->memory()) + offsetInMemory; |
| unsigned count = UINT_MAX; |
| if (countValue >= 0) |
| count = static_cast<unsigned>(countValue); |
| return ParkingLot::unparkCount(pointer, count); |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationWasmMemoryInit, size_t, (Instance* instance, unsigned dataSegmentIndex, uint32_t dstAddress, uint32_t srcAddress, uint32_t length)) |
| { |
| ASSERT(dataSegmentIndex < instance->module().moduleInformation().dataSegmentsCount()); |
| return instance->memoryInit(dstAddress, srcAddress, length, dataSegmentIndex); |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationWasmDataDrop, void, (Instance* instance, unsigned dataSegmentIndex)) |
| { |
| ASSERT(dataSegmentIndex < instance->module().moduleInformation().dataSegmentsCount()); |
| instance->dataDrop(dataSegmentIndex); |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationWasmThrow, void*, (Instance* instance, CallFrame* callFrame, unsigned exceptionIndex, EncodedJSValue* arguments)) |
| { |
| instance->storeTopCallFrame(callFrame); |
| |
| JSWebAssemblyInstance* jsInstance = instance->owner<JSWebAssemblyInstance>(); |
| JSGlobalObject* globalObject = jsInstance->globalObject(); |
| VM& vm = globalObject->vm(); |
| auto throwScope = DECLARE_THROW_SCOPE(vm); |
| |
| const Wasm::Tag& tag = instance->tag(exceptionIndex); |
| |
| FixedVector<uint64_t> values(tag.parameterCount()); |
| for (unsigned i = 0; i < tag.parameterCount(); ++i) |
| values[i] = arguments[i]; |
| |
| JSWebAssemblyException* exception = JSWebAssemblyException::create(vm, globalObject->webAssemblyExceptionStructure(), tag, WTFMove(values)); |
| throwException(globalObject, throwScope, exception); |
| |
| genericUnwind(vm, callFrame); |
| ASSERT(!!vm.callFrameForCatch); |
| ASSERT(!!vm.targetMachinePCForThrow); |
| // FIXME: We could make this better: |
| // This is a total hack, but the llint (both op_catch and llint_handle_uncaught_exception) |
| // require a cell in the callee field to load the VM. (The baseline JIT does not require |
| // this since it is compiled with a constant VM pointer.) We could make the calling convention |
| // for exceptions first load callFrameForCatch info call frame register before jumping |
| // to the exception handler. If we did this, we could remove this terrible hack. |
| // https://bugs.webkit.org/show_bug.cgi?id=170440 |
| vm.calleeForWasmCatch = callFrame->callee(); |
| bitwise_cast<uint64_t*>(callFrame)[static_cast<int>(CallFrameSlot::callee)] = bitwise_cast<uint64_t>(jsInstance->module()); |
| return vm.targetMachinePCForThrow; |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationWasmRethrow, void*, (Instance* instance, CallFrame* callFrame, EncodedJSValue thrownValue)) |
| { |
| instance->storeTopCallFrame(callFrame); |
| |
| JSWebAssemblyInstance* jsInstance = instance->owner<JSWebAssemblyInstance>(); |
| JSGlobalObject* globalObject = jsInstance->globalObject(); |
| VM& vm = globalObject->vm(); |
| auto throwScope = DECLARE_THROW_SCOPE(vm); |
| |
| throwException(globalObject, throwScope, JSValue::decode(thrownValue)); |
| |
| genericUnwind(vm, callFrame); |
| ASSERT(!!vm.callFrameForCatch); |
| ASSERT(!!vm.targetMachinePCForThrow); |
| // FIXME: We could make this better: |
| // This is a total hack, but the llint (both op_catch and llint_handle_uncaught_exception) |
| // require a cell in the callee field to load the VM. (The baseline JIT does not require |
| // this since it is compiled with a constant VM pointer.) We could make the calling convention |
| // for exceptions first load callFrameForCatch info call frame register before jumping |
| // to the exception handler. If we did this, we could remove this terrible hack. |
| // https://bugs.webkit.org/show_bug.cgi?id=170440 |
| vm.calleeForWasmCatch = callFrame->callee(); |
| bitwise_cast<uint64_t*>(callFrame)[static_cast<int>(CallFrameSlot::callee)] = bitwise_cast<uint64_t>(jsInstance->module()); |
| return vm.targetMachinePCForThrow; |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationWasmToJSException, void*, (CallFrame* callFrame, Wasm::ExceptionType type, Instance* wasmInstance)) |
| { |
| wasmInstance->storeTopCallFrame(callFrame); |
| JSWebAssemblyInstance* instance = wasmInstance->owner<JSWebAssemblyInstance>(); |
| JSGlobalObject* globalObject = instance->globalObject(); |
| |
| // Do not retrieve VM& from CallFrame since CallFrame's callee is not a JSCell. |
| VM& vm = globalObject->vm(); |
| |
| { |
| auto throwScope = DECLARE_THROW_SCOPE(vm); |
| |
| JSObject* error; |
| if (type == ExceptionType::StackOverflow) |
| error = createStackOverflowError(globalObject); |
| else |
| error = createJSWebAssemblyRuntimeError(globalObject, vm, type); |
| throwException(globalObject, throwScope, error); |
| } |
| |
| genericUnwind(vm, callFrame); |
| ASSERT(!!vm.callFrameForCatch); |
| ASSERT(!!vm.targetMachinePCForThrow); |
| // FIXME: We could make this better: |
| // This is a total hack, but the llint (both op_catch and llint_handle_uncaught_exception) |
| // require a cell in the callee field to load the VM. (The baseline JIT does not require |
| // this since it is compiled with a constant VM pointer.) We could make the calling convention |
| // for exceptions first load callFrameForCatch info call frame register before jumping |
| // to the exception handler. If we did this, we could remove this terrible hack. |
| // https://bugs.webkit.org/show_bug.cgi?id=170440 |
| vm.calleeForWasmCatch = callFrame->callee(); |
| bitwise_cast<uint64_t*>(callFrame)[static_cast<int>(CallFrameSlot::callee)] = bitwise_cast<uint64_t>(instance->module()); |
| return vm.targetMachinePCForThrow; |
| } |
| |
| JSC_DEFINE_JIT_OPERATION(operationWasmRetrieveAndClearExceptionIfCatchable, PointerPair, (Instance* instance)) |
| { |
| JSWebAssemblyInstance* jsInstance = instance->owner<JSWebAssemblyInstance>(); |
| JSGlobalObject* globalObject = jsInstance->globalObject(); |
| VM& vm = globalObject->vm(); |
| auto throwScope = DECLARE_THROW_SCOPE(vm); |
| |
| RELEASE_ASSERT(!!throwScope.exception()); |
| |
| Exception* exception = throwScope.exception(); |
| JSValue thrownValue = exception->value(); |
| |
| // We want to clear the exception here rather than in the catch prologue |
| // JIT code because clearing it also entails clearing a bit in an Atomic |
| // bit field in VMTraps. |
| throwScope.clearException(); |
| |
| void* payload = nullptr; |
| if (JSWebAssemblyException* wasmException = jsDynamicCast<JSWebAssemblyException*>(vm, thrownValue)) |
| payload = bitwise_cast<void*>(wasmException->payload().data()); |
| return PointerPair { bitwise_cast<void*>(JSValue::encode(thrownValue)), payload }; |
| } |
| |
| } } // namespace JSC::Wasm |
| |
| IGNORE_WARNINGS_END |
| |
| #endif // ENABLE(WEBASSEMBLY) |
