v8/test/cctest/test-run-wasm-relocation-x64.cc

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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/v8.h"
#include "src/debug/debug.h"
#include "src/disasm.h"
#include "src/disassembler.h"
#include "src/ic/ic.h"
#include "src/macro-assembler.h"
#include "src/objects-inl.h"
#include "src/ostreams.h"
#include "test/cctest/cctest.h"
#include "test/cctest/compiler/c-signature.h"
#include "test/cctest/compiler/call-tester.h"
using namespace v8::internal;
using namespace v8::internal::compiler;
#define __ assm.
static int32_t DummyStaticFunction(Object* result) { return 1; }
TEST(WasmRelocationX64MemoryReference) {
Isolate* isolate = CcTest::i_isolate();
HandleScope scope(isolate);
v8::internal::byte buffer[4096];
Assembler assm(isolate, buffer, sizeof buffer);
DummyStaticFunction(NULL);
int64_t imm = 1234567;
__ movq(rax, imm, RelocInfo::WASM_MEMORY_REFERENCE);
__ nop();
__ ret(0);
CodeDesc desc;
assm.GetCode(&desc);
Handle<Code> code = isolate->factory()->NewCode(
desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
USE(code);
CSignature0<int64_t> csig;
CodeRunner<int64_t> runnable(isolate, code, &csig);
int64_t ret_value = runnable.Call();
CHECK_EQ(ret_value, imm);
#ifdef OBJECT_PRINT
OFStream os(stdout);
code->Print(os);
byte* begin = code->instruction_start();
byte* end = begin + code->instruction_size();
disasm::Disassembler::Disassemble(stdout, begin, end);
#endif
int offset = 1234;
// Relocating references by offset
int mode_mask = (1 << RelocInfo::WASM_MEMORY_REFERENCE);
for (RelocIterator it(*code, mode_mask); !it.done(); it.next()) {
DCHECK(RelocInfo::IsWasmMemoryReference(it.rinfo()->rmode()));
it.rinfo()->update_wasm_memory_reference(
it.rinfo()->wasm_memory_reference(),
it.rinfo()->wasm_memory_reference() + offset, SKIP_ICACHE_FLUSH);
}
// Check if immediate is updated correctly
ret_value = runnable.Call();
CHECK_EQ(ret_value, imm + offset);
#ifdef OBJECT_PRINT
code->Print(os);
begin = code->instruction_start();
end = begin + code->instruction_size();
disasm::Disassembler::Disassemble(stdout, begin, end);
#endif
}
TEST(WasmRelocationX64WasmMemorySizeReference) {
CcTest::InitializeVM();
Isolate* isolate = CcTest::i_isolate();
HandleScope scope(isolate);
v8::internal::byte buffer[4096];
Assembler assm(isolate, buffer, sizeof buffer);
DummyStaticFunction(NULL);
int32_t size = 512;
Label fail;
__ movl(rax, Immediate(size, RelocInfo::WASM_MEMORY_SIZE_REFERENCE));
__ cmpl(rax, Immediate(size, RelocInfo::WASM_MEMORY_SIZE_REFERENCE));
__ j(not_equal, &fail);
__ ret(0);
__ bind(&fail);
__ movl(rax, Immediate(0xdeadbeef));
__ ret(0);
CodeDesc desc;
assm.GetCode(&desc);
Handle<Code> code = isolate->factory()->NewCode(
desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
USE(code);
CSignature0<int64_t> csig;
CodeRunner<int64_t> runnable(isolate, code, &csig);
int64_t ret_value = runnable.Call();
CHECK_NE(ret_value, bit_cast<uint32_t>(0xdeadbeef));
#ifdef OBJECT_PRINT
OFStream os(stdout);
code->Print(os);
byte* begin = code->instruction_start();
byte* end = begin + code->instruction_size();
disasm::Disassembler::Disassemble(stdout, begin, end);
#endif
int32_t diff = 512;
int mode_mask = (1 << RelocInfo::WASM_MEMORY_SIZE_REFERENCE);
for (RelocIterator it(*code, mode_mask); !it.done(); it.next()) {
DCHECK(RelocInfo::IsWasmMemorySizeReference(it.rinfo()->rmode()));
it.rinfo()->update_wasm_memory_size(
it.rinfo()->wasm_memory_size_reference(),
it.rinfo()->wasm_memory_size_reference() + diff, SKIP_ICACHE_FLUSH);
}
ret_value = runnable.Call();
CHECK_NE(ret_value, bit_cast<uint32_t>(0xdeadbeef));
#ifdef OBJECT_PRINT
code->Print(os);
begin = code->instruction_start();
end = begin + code->instruction_size();
disasm::Disassembler::Disassemble(stdout, begin, end);
#endif
}
#undef __