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/*
* Copyright (C) 2016-2024 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 "WebAssemblyFunction.h"
#if ENABLE(WEBASSEMBLY)
#include "JITOpaqueByproducts.h"
#include "JSCJSValueInlines.h"
#include "JSObject.h"
#include "JSObjectInlines.h"
#include "JSToWasm.h"
#include "JSWebAssemblyHelpers.h"
#include "JSWebAssemblyInstance.h"
#include "JSWebAssemblyMemory.h"
#include "JSWebAssemblyRuntimeError.h"
#include "LLIntThunks.h"
#include "LinkBuffer.h"
#include "NativeExecutable.h"
#include "ProtoCallFrameInlines.h"
#include "SlotVisitorInlines.h"
#include "StructureInlines.h"
#include "WasmCallee.h"
#include "WasmCallingConvention.h"
#include "WasmContext.h"
#include "WasmFormat.h"
#include "WasmMemory.h"
#include "WasmMemoryInformation.h"
#include "WasmModuleInformation.h"
#include "WasmOperations.h"
#include "WasmTypeDefinitionInlines.h"
#include <wtf/StackPointer.h>
#include <wtf/SystemTracing.h>
namespace JSC {
const ClassInfo WebAssemblyFunction::s_info = { "WebAssemblyFunction"_s, &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(WebAssemblyFunction) };
static JSC_DECLARE_HOST_FUNCTION(callWebAssemblyFunction);
JSC_DEFINE_HOST_FUNCTION(callWebAssemblyFunction, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
WebAssemblyFunction* wasmFunction = jsCast<WebAssemblyFunction*>(callFrame->jsCallee());
if (wasmFunction->instance()->taintedness() >= SourceTaintedOrigin::IndirectlyTainted)
vm.setMightBeExecutingTaintedCode();
// Note: we specifically use the WebAssemblyFunction as the callee to begin with in the ProtoCallFrame.
// The reason for this is that calling into the IPInt may stack overflow, and the stack overflow
// handler might read the global object from the callee.
// For wasm, we setup |codeBlock| and |this| differently.
// |codeBlock| : JS entry wrapper expects a JSWebAssemblyInstance* as the |codeBlock| value argument.
ProtoCallFrame protoCallFrame;
protoCallFrame.init(nullptr, globalObject, wasmFunction, JSValue(), nullptr, callFrame->argumentCountIncludingThis(), std::bit_cast<EncodedJSValue*>(callFrame->addressOfArgumentsStart()));
protoCallFrame.setWasmInstance(wasmFunction->instance());
return vmEntryToWasm(wasmFunction->jsToWasm(ArityCheckMode::MustCheckArity).taggedPtr(), &vm, &protoCallFrame);
}
WebAssemblyFunction* WebAssemblyFunction::create(VM& vm, JSGlobalObject* globalObject, Structure* structure, unsigned length, const String& name, JSWebAssemblyInstance* instance, Wasm::JSToWasmCallee& jsToWasm, Wasm::IPIntCallee& wasmCallee, Wasm::WasmToWasmImportableFunction::LoadLocation wasmToWasmEntrypointLoadLocation, Wasm::TypeIndex typeIndex, Ref<const Wasm::RTT>&& rtt)
{
NativeExecutable* base = vm.getHostFunction(callWebAssemblyFunction, ImplementationVisibility::Public, WasmFunctionIntrinsic, callHostFunctionAsConstructor, nullptr, String());
// Since ClosureCall uses this executable as an identity for Wasm CallIC thunk, we need to make it diversified.
NativeExecutable* executable = NativeExecutable::create(vm, base->generatedJITCodeForCall(), callWebAssemblyFunction, base->generatedJITCodeForConstruct(), callHostFunctionAsConstructor, ImplementationVisibility::Public, name);
WebAssemblyFunction* function = new (NotNull, allocateCell<WebAssemblyFunction>(vm)) WebAssemblyFunction(vm, executable, globalObject, structure, instance, jsToWasm, wasmCallee, wasmToWasmEntrypointLoadLocation, typeIndex, WTFMove(rtt));
function->finishCreation(vm, executable, length, name);
return function;
}
Structure* WebAssemblyFunction::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
ASSERT(globalObject);
return Structure::create(vm, globalObject, prototype, TypeInfo(JSFunctionType, StructureFlags), info());
}
WebAssemblyFunction::WebAssemblyFunction(VM& vm, NativeExecutable* executable, JSGlobalObject* globalObject, Structure* structure, JSWebAssemblyInstance* instance, Wasm::JSToWasmCallee& jsToWasm, Wasm::IPIntCallee& wasmCallee, Wasm::WasmToWasmImportableFunction::LoadLocation wasmToWasmEntrypointLoadLocation, Wasm::TypeIndex typeIndex, Ref<const Wasm::RTT>&& rtt)
: Base { vm, executable, globalObject, structure, Wasm::WasmOrJSImportableFunction { { { CalleeBits(&wasmCallee), { instance, WriteBarrierEarlyInit }, wasmToWasmEntrypointLoadLocation }, rtt.ptr(), typeIndex }, { }, { } }, nullptr }
, m_boxedJSToWasmCallee(jsToWasm)
, m_frameSize(jsToWasm.frameSize())
, m_taintedness(instance->taintedness())
{
}
template<typename Visitor>
void WebAssemblyFunction::visitChildrenImpl(JSCell* cell, Visitor& visitor)
{
WebAssemblyFunction* thisObject = jsCast<WebAssemblyFunction*>(cell);
ASSERT_GC_OBJECT_INHERITS(thisObject, info());
Base::visitChildren(thisObject, visitor);
}
DEFINE_VISIT_CHILDREN(WebAssemblyFunction);
void WebAssemblyFunction::destroy(JSCell* cell)
{
static_cast<WebAssemblyFunction*>(cell)->WebAssemblyFunction::~WebAssemblyFunction();
}
} // namespace JSC
#endif // ENABLE(WEBASSEMBLY)
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