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// Copyright 2015 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 <stdlib.h>
#include "src/assembler-inl.h"
#include "src/objects-inl.h"
#include "src/v8.h"
#include "test/cctest/cctest.h"
#include "test/cctest/compiler/c-signature.h"
#include "test/cctest/wasm/wasm-run-utils.h"
#include "test/common/wasm/wasm-macro-gen.h"
namespace v8 {
namespace internal {
namespace wasm {
namespace test_run_wasm_relocation {
WASM_COMPILED_EXEC_TEST(RunPatchWasmContext) {
WasmRunner<uint32_t, uint32_t> r(execution_mode);
Isolate* isolate = CcTest::i_isolate();
r.builder().AddGlobal<uint32_t>();
r.builder().AddGlobal<uint32_t>();
BUILD(r, WASM_SET_GLOBAL(0, WASM_GET_LOCAL(0)), WASM_GET_GLOBAL(0));
CHECK_EQ(1, r.builder().CodeTableLength());
// Run with the old global data.
CHECK_EQ(113, r.Call(113));
WasmContext* old_wasm_context =
r.builder().instance_object()->wasm_context()->get();
Address old_wasm_context_address =
reinterpret_cast<Address>(old_wasm_context);
uint32_t new_global_data[3] = {0, 0, 0};
WasmContext new_wasm_context;
new_wasm_context.globals_start = reinterpret_cast<byte*>(new_global_data);
{
// TODO(6792): No longer needed once WebAssembly code is off heap.
CodeSpaceMemoryModificationScope modification_scope(isolate->heap());
// Patch in a new WasmContext that points to the new global data.
int filter = 1 << RelocInfo::WASM_CONTEXT_REFERENCE;
bool patched = false;
Handle<Code> code = r.GetWrapperCode();
for (RelocIterator it(*code, filter); !it.done(); it.next()) {
CHECK_EQ(old_wasm_context_address, it.rinfo()->wasm_context_reference());
it.rinfo()->set_wasm_context_reference(
reinterpret_cast<Address>(&new_wasm_context));
patched = true;
}
CHECK(patched);
Assembler::FlushICache(code->instruction_start(), code->instruction_size());
}
// Run with the new global data.
CHECK_EQ(115, r.Call(115));
CHECK_EQ(115, new_global_data[0]);
}
} // namespace test_run_wasm_relocation
} // namespace wasm
} // namespace internal
} // namespace v8
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