blob: 0789c9e3dfd9dcaf6ac0fc5347a5a53cc6ba7507 [file] [log] [blame]
/*
* Copyright (C) 2017-2019 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 "WasmInstance.h"
#if ENABLE(WEBASSEMBLY)
#include "JSCInlines.h"
#include "JSWebAssemblyHelpers.h"
#include "JSWebAssemblyInstance.h"
#include "Register.h"
#include "WasmModuleInformation.h"
#include <wtf/CheckedArithmetic.h>
namespace JSC { namespace Wasm {
namespace {
size_t globalMemoryByteSize(Module& module)
{
return (Checked<size_t>(module.moduleInformation().globals.size()) * sizeof(Register)).unsafeGet();
}
}
Instance::Instance(Context* context, Ref<Module>&& module, EntryFrame** pointerToTopEntryFrame, void** pointerToActualStackLimit, StoreTopCallFrameCallback&& storeTopCallFrame)
: m_context(context)
, m_module(WTFMove(module))
, m_globals(MallocPtr<GlobalValue>::malloc(globalMemoryByteSize(m_module.get())))
, m_globalsToMark(m_module.get().moduleInformation().globals.size())
, m_pointerToTopEntryFrame(pointerToTopEntryFrame)
, m_pointerToActualStackLimit(pointerToActualStackLimit)
, m_storeTopCallFrame(WTFMove(storeTopCallFrame))
, m_numImportFunctions(m_module->moduleInformation().importFunctionCount())
{
for (unsigned i = 0; i < m_numImportFunctions; ++i)
new (importFunctionInfo(i)) ImportFunctionInfo();
memset(static_cast<void*>(m_globals.get()), 0, globalMemoryByteSize(m_module.get()));
for (unsigned i = 0; i < m_module->moduleInformation().globals.size(); ++i) {
if (isSubtype(m_module.get().moduleInformation().globals[i].type, Anyref))
m_globalsToMark.set(i);
}
memset(bitwise_cast<char*>(this) + offsetOfTablePtr(m_numImportFunctions, 0), 0, m_module->moduleInformation().tableCount() * sizeof(Table*));
}
Ref<Instance> Instance::create(Context* context, Ref<Module>&& module, EntryFrame** pointerToTopEntryFrame, void** pointerToActualStackLimit, StoreTopCallFrameCallback&& storeTopCallFrame)
{
return adoptRef(*new (NotNull, fastMalloc(allocationSize(module->moduleInformation().importFunctionCount(), module->moduleInformation().tableCount()))) Instance(context, WTFMove(module), pointerToTopEntryFrame, pointerToActualStackLimit, WTFMove(storeTopCallFrame)));
}
Instance::~Instance() { }
size_t Instance::extraMemoryAllocated() const
{
return globalMemoryByteSize(m_module.get()) + allocationSize(m_numImportFunctions, m_module->moduleInformation().tableCount());
}
void Instance::setGlobal(unsigned i, JSValue value)
{
ASSERT(m_owner);
m_globals.get()[i].anyref.set(owner<JSWebAssemblyInstance>()->vm(), owner<JSWebAssemblyInstance>(), value);
}
JSValue Instance::getFunctionWrapper(unsigned i) const
{
JSValue value = m_functionWrappers.get(i).get();
if (value.isEmpty())
return jsNull();
return value;
}
void Instance::setFunctionWrapper(unsigned i, JSValue value)
{
ASSERT(m_owner);
ASSERT(value.isFunction(owner<JSWebAssemblyInstance>()->vm()));
ASSERT(!m_functionWrappers.contains(i));
auto locker = holdLock(owner<JSWebAssemblyInstance>()->cellLock());
m_functionWrappers.set(i, WriteBarrier<Unknown>(owner<JSWebAssemblyInstance>()->vm(), owner<JSWebAssemblyInstance>(), value));
ASSERT(getFunctionWrapper(i) == value);
}
Table* Instance::table(unsigned i)
{
RELEASE_ASSERT(i < m_module->moduleInformation().tableCount());
return *bitwise_cast<Table**>(bitwise_cast<char*>(this) + offsetOfTablePtr(m_numImportFunctions, i));
}
void Instance::setTable(unsigned i, Ref<Table>&& table)
{
RELEASE_ASSERT(i < m_module->moduleInformation().tableCount());
ASSERT(!this->table(i));
*bitwise_cast<Table**>(bitwise_cast<char*>(this) + offsetOfTablePtr(m_numImportFunctions, i)) = &table.leakRef();
}
EncodedJSValue getWasmTableElement(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));
}
bool setWasmTableElement(Instance* instance, unsigned tableIndex, int32_t signedIndex, EncodedJSValue encValue)
{
ASSERT(tableIndex < instance->module().moduleInformation().tableCount());
if (signedIndex < 0)
return false;
uint32_t index = signedIndex;
if (index >= instance->table(tableIndex)->length())
return false;
JSValue value = JSValue::decode(encValue);
if (instance->table(tableIndex)->type() == Wasm::TableElementType::Anyref)
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;
}
int32_t doWasmTableGrow(Instance* instance, unsigned tableIndex, EncodedJSValue fill, int32_t delta)
{
ASSERT(tableIndex < instance->module().moduleInformation().tableCount());
auto oldSize = instance->table(tableIndex)->length();
if (delta < 0)
return oldSize;
auto newSize = instance->table(tableIndex)->grow(delta);
if (!newSize || *newSize == oldSize)
return -1;
for (unsigned i = oldSize; i < instance->table(tableIndex)->length(); ++i)
setWasmTableElement(instance, tableIndex, i, fill);
return oldSize;
}
bool doWasmTableFill(Instance* instance, unsigned tableIndex, int32_t unsafeOffset, EncodedJSValue fill, int32_t unsafeCount)
{
ASSERT(tableIndex < instance->module().moduleInformation().tableCount());
if (unsafeOffset < 0 || unsafeCount < 0)
return false;
unsigned offset = unsafeOffset;
unsigned count = unsafeCount;
if (offset >= instance->table(tableIndex)->length() || offset + count > instance->table(tableIndex)->length())
return false;
for (unsigned j = 0; j < count; ++j)
setWasmTableElement(instance, tableIndex, offset + j, fill);
return true;
}
EncodedJSValue doWasmRefFunc(Instance* instance, uint32_t index)
{
JSValue value = instance->getFunctionWrapper(index);
ASSERT(value.isFunction(instance->owner<JSObject>()->vm()));
return JSValue::encode(value);
}
} } // namespace JSC::Wasm
#endif // ENABLE(WEBASSEMBLY)