JSWebAssemblyCodeBlock.cpp [plain text]
#include "config.h"
#include "JSWebAssemblyCodeBlock.h"
#if ENABLE(WEBASSEMBLY)
#include "JSCInlines.h"
#include "JSWebAssemblyLinkError.h"
#include "JSWebAssemblyMemory.h"
#include "JSWebAssemblyModule.h"
#include "WasmBinding.h"
#include "WasmModuleInformation.h"
#include <wtf/CurrentTime.h>
namespace JSC {
const ClassInfo JSWebAssemblyCodeBlock::s_info = { "WebAssemblyCodeBlock", nullptr, nullptr, nullptr, CREATE_METHOD_TABLE(JSWebAssemblyCodeBlock) };
JSWebAssemblyCodeBlock* JSWebAssemblyCodeBlock::create(VM& vm, Ref<Wasm::CodeBlock> codeBlock, JSWebAssemblyModule* module)
{
const Wasm::ModuleInformation& moduleInformation = module->module().moduleInformation();
auto* result = new (NotNull, allocateCell<JSWebAssemblyCodeBlock>(vm.heap, allocationSize(moduleInformation.importFunctionCount()))) JSWebAssemblyCodeBlock(vm, WTFMove(codeBlock), moduleInformation);
result->finishCreation(vm, module);
return result;
}
JSWebAssemblyCodeBlock::JSWebAssemblyCodeBlock(VM& vm, Ref<Wasm::CodeBlock>&& codeBlock, const Wasm::ModuleInformation& moduleInformation)
: Base(vm, vm.webAssemblyCodeBlockStructure.get())
, m_codeBlock(WTFMove(codeBlock))
{
m_wasmToJSExitStubs.reserveCapacity(m_codeBlock->functionImportCount());
for (unsigned importIndex = 0; importIndex < m_codeBlock->functionImportCount(); ++importIndex) {
Wasm::SignatureIndex signatureIndex = moduleInformation.importFunctionSignatureIndices.at(importIndex);
auto binding = Wasm::wasmToJs(&vm, m_callLinkInfos, signatureIndex, importIndex);
if (UNLIKELY(!binding)) {
switch (binding.error()) {
case Wasm::BindingFailure::OutOfMemory:
m_errorMessage = ASCIILiteral("Out of executable memory");
return;
}
RELEASE_ASSERT_NOT_REACHED();
}
m_wasmToJSExitStubs.uncheckedAppend(binding.value());
importWasmToJSStub(importIndex) = m_wasmToJSExitStubs[importIndex].code().executableAddress();
}
}
void JSWebAssemblyCodeBlock::finishCreation(VM& vm, JSWebAssemblyModule* module)
{
Base::finishCreation(vm);
m_module.set(vm, this, module);
}
void JSWebAssemblyCodeBlock::destroy(JSCell* cell)
{
static_cast<JSWebAssemblyCodeBlock*>(cell)->JSWebAssemblyCodeBlock::~JSWebAssemblyCodeBlock();
}
bool JSWebAssemblyCodeBlock::isSafeToRun(JSWebAssemblyMemory* memory) const
{
return m_codeBlock->isSafeToRun(memory->memory().mode());
}
void JSWebAssemblyCodeBlock::clearJSCallICs(VM& vm)
{
for (auto iter = m_callLinkInfos.begin(); !!iter; ++iter)
(*iter)->unlink(vm);
}
void JSWebAssemblyCodeBlock::visitChildren(JSCell* cell, SlotVisitor& visitor)
{
JSWebAssemblyCodeBlock* thisObject = jsCast<JSWebAssemblyCodeBlock*>(cell);
ASSERT_GC_OBJECT_INHERITS(thisObject, info());
Base::visitChildren(thisObject, visitor);
visitor.append(thisObject->m_module);
visitor.addUnconditionalFinalizer(&thisObject->m_unconditionalFinalizer);
}
void JSWebAssemblyCodeBlock::UnconditionalFinalizer::finalizeUnconditionally()
{
JSWebAssemblyCodeBlock* thisObject = bitwise_cast<JSWebAssemblyCodeBlock*>(
bitwise_cast<char*>(this) - OBJECT_OFFSETOF(JSWebAssemblyCodeBlock, m_unconditionalFinalizer));
for (auto iter = thisObject->m_callLinkInfos.begin(); !!iter; ++iter)
(*iter)->visitWeak(*thisObject->vm());
}
}
#endif // ENABLE(WEBASSEMBLY)