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// Copyright 2019 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/wasm/wasm-objects-inl.h"
#include "src/wasm/wasm-opcodes.h"
#include "src/wasm/wasm-module-builder.h"
#include "test/cctest/cctest.h"
#include "test/cctest/manually-externalized-buffer.h"
#include "test/common/wasm/flag-utils.h"
#include "test/common/wasm/test-signatures.h"
#include "test/common/wasm/wasm-macro-gen.h"
#include "test/common/wasm/wasm-module-runner.h"
namespace v8 {
namespace internal {
namespace wasm {
namespace test_grow_memory {
using testing::CompileAndInstantiateForTesting;
using v8::internal::testing::ManuallyExternalizedBuffer;
namespace {
void ExportAsMain(WasmFunctionBuilder* f) {
f->builder()->AddExport(CStrVector("main"), f);
}
#define EMIT_CODE_WITH_END(f, code) \
do { \
f->EmitCode(code, sizeof(code)); \
f->Emit(kExprEnd); \
} while (false)
void Cleanup(Isolate* isolate = CcTest::InitIsolateOnce()) {
// By sending a low memory notifications, we will try hard to collect all
// garbage and will therefore also invoke all weak callbacks of actually
// unreachable persistent handles.
reinterpret_cast<v8::Isolate*>(isolate)->LowMemoryNotification();
}
} // namespace
TEST(GrowMemDetaches) {
{
Isolate* isolate = CcTest::InitIsolateOnce();
HandleScope scope(isolate);
Handle<WasmMemoryObject> memory_object =
WasmMemoryObject::New(isolate, 16, 100, SharedFlag::kNotShared)
.ToHandleChecked();
Handle<JSArrayBuffer> buffer(memory_object->array_buffer(), isolate);
int32_t result = WasmMemoryObject::Grow(isolate, memory_object, 0);
CHECK_EQ(16, result);
CHECK_NE(*buffer, memory_object->array_buffer());
CHECK(buffer->was_detached());
}
Cleanup();
}
TEST(Externalized_GrowMemMemSize) {
{
Isolate* isolate = CcTest::InitIsolateOnce();
HandleScope scope(isolate);
Handle<WasmMemoryObject> memory_object =
WasmMemoryObject::New(isolate, 16, 100, SharedFlag::kNotShared)
.ToHandleChecked();
ManuallyExternalizedBuffer external(
handle(memory_object->array_buffer(), isolate));
int32_t result = WasmMemoryObject::Grow(isolate, memory_object, 0);
CHECK_EQ(16, result);
CHECK_NE(*external.buffer_, memory_object->array_buffer());
CHECK(external.buffer_->was_detached());
}
Cleanup();
}
TEST(Run_WasmModule_Buffer_Externalized_GrowMem) {
{
Isolate* isolate = CcTest::InitIsolateOnce();
HandleScope scope(isolate);
TestSignatures sigs;
v8::internal::AccountingAllocator allocator;
Zone zone(&allocator, ZONE_NAME);
WasmModuleBuilder* builder = new (&zone) WasmModuleBuilder(&zone);
WasmFunctionBuilder* f = builder->AddFunction(sigs.i_v());
ExportAsMain(f);
byte code[] = {WASM_GROW_MEMORY(WASM_I32V_1(6)), WASM_DROP,
WASM_MEMORY_SIZE};
EMIT_CODE_WITH_END(f, code);
ZoneBuffer buffer(&zone);
builder->WriteTo(&buffer);
testing::SetupIsolateForWasmModule(isolate);
ErrorThrower thrower(isolate, "Test");
const Handle<WasmInstanceObject> instance =
CompileAndInstantiateForTesting(
isolate, &thrower, ModuleWireBytes(buffer.begin(), buffer.end()))
.ToHandleChecked();
Handle<WasmMemoryObject> memory_object(instance->memory_object(), isolate);
// Fake the Embedder flow by externalizing the array buffer.
ManuallyExternalizedBuffer external1(
handle(memory_object->array_buffer(), isolate));
// Grow using the API.
uint32_t result = WasmMemoryObject::Grow(isolate, memory_object, 4);
CHECK_EQ(16, result);
CHECK(external1.buffer_->was_detached()); // growing always detaches
CHECK_EQ(0, external1.buffer_->byte_length());
CHECK_NE(*external1.buffer_, memory_object->array_buffer());
// Fake the Embedder flow by externalizing the array buffer.
ManuallyExternalizedBuffer external2(
handle(memory_object->array_buffer(), isolate));
// Grow using an internal WASM bytecode.
result = testing::RunWasmModuleForTesting(isolate, instance, 0, nullptr);
CHECK_EQ(26, result);
CHECK(external2.buffer_->was_detached()); // growing always detaches
CHECK_EQ(0, external2.buffer_->byte_length());
CHECK_NE(*external2.buffer_, memory_object->array_buffer());
}
Cleanup();
}
} // namespace test_grow_memory
} // namespace wasm
} // namespace internal
} // namespace v8
#undef EMIT_CODE_WITH_END
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