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// Copyright 2018 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/codegen/arm/assembler-arm-inl.h"
#include "src/codegen/macro-assembler.h"
#include "src/execution/simulator.h"
#include "src/utils/ostreams.h"
#include "test/common/assembler-tester.h"
#include "test/unittests/test-utils.h"
#include "testing/gtest-support.h"
namespace v8 {
namespace internal {
#define __ masm.
// If we are running on android and the output is not redirected (i.e. ends up
// in the android log) then we cannot find the error message in the output. This
// macro just returns the empty string in that case.
#if defined(ANDROID) && !defined(V8_ANDROID_LOG_STDOUT)
#define ERROR_MESSAGE(msg) ""
#else
#define ERROR_MESSAGE(msg) msg
#endif
// Test the x64 assembler by compiling some simple functions into
// a buffer and executing them. These tests do not initialize the
// V8 library, create a context, or use any V8 objects.
class MacroAssemblerTest : public TestWithIsolate {};
TEST_F(MacroAssemblerTest, TestHardAbort) {
auto buffer = AllocateAssemblerBuffer();
MacroAssembler masm(isolate(), AssemblerOptions{}, CodeObjectRequired::kNo,
buffer->CreateView());
__ set_root_array_available(false);
__ set_abort_hard(true);
__ Abort(AbortReason::kNoReason);
CodeDesc desc;
masm.GetCode(isolate(), &desc);
buffer->MakeExecutable();
// We need an isolate here to execute in the simulator.
auto f = GeneratedCode<void>::FromBuffer(isolate(), buffer->start());
ASSERT_DEATH_IF_SUPPORTED({ f.Call(); }, ERROR_MESSAGE("abort: no reason"));
}
TEST_F(MacroAssemblerTest, TestCheck) {
auto buffer = AllocateAssemblerBuffer();
MacroAssembler masm(isolate(), AssemblerOptions{}, CodeObjectRequired::kNo,
buffer->CreateView());
__ set_root_array_available(false);
__ set_abort_hard(true);
// Fail if the first parameter is 17.
__ Move32BitImmediate(r1, Operand(17));
__ cmp(r0, r1); // 1st parameter is in {r0}.
__ Check(ne, AbortReason::kNoReason);
__ Ret();
CodeDesc desc;
masm.GetCode(isolate(), &desc);
buffer->MakeExecutable();
// We need an isolate here to execute in the simulator.
auto f = GeneratedCode<void, int>::FromBuffer(isolate(), buffer->start());
f.Call(0);
f.Call(18);
ASSERT_DEATH_IF_SUPPORTED({ f.Call(17); }, ERROR_MESSAGE("abort: no reason"));
}
struct MoveObjectAndSlotTestCase {
const char* comment;
Register dst_object;
Register dst_slot;
Register object;
Register offset_register = no_reg;
};
const MoveObjectAndSlotTestCase kMoveObjectAndSlotTestCases[] = {
{"no overlap", r0, r1, r2},
{"no overlap", r0, r1, r2, r3},
{"object == dst_object", r2, r1, r2},
{"object == dst_object", r2, r1, r2, r3},
{"object == dst_slot", r1, r2, r2},
{"object == dst_slot", r1, r2, r2, r3},
{"offset == dst_object", r0, r1, r2, r0},
{"offset == dst_object && object == dst_slot", r0, r1, r1, r0},
{"offset == dst_slot", r0, r1, r2, r1},
{"offset == dst_slot && object == dst_object", r0, r1, r0, r1}};
// Make sure we include offsets that cannot be encoded in an add instruction.
const int kOffsets[] = {0, 42, kMaxRegularHeapObjectSize, 0x101001};
template <typename T>
class MacroAssemblerTestWithParam : public MacroAssemblerTest,
public ::testing::WithParamInterface<T> {};
using MacroAssemblerTestMoveObjectAndSlot =
MacroAssemblerTestWithParam<MoveObjectAndSlotTestCase>;
TEST_P(MacroAssemblerTestMoveObjectAndSlot, MoveObjectAndSlot) {
const MoveObjectAndSlotTestCase test_case = GetParam();
TRACED_FOREACH(int32_t, offset, kOffsets) {
auto buffer = AllocateAssemblerBuffer();
MacroAssembler masm(nullptr, AssemblerOptions{}, CodeObjectRequired::kNo,
buffer->CreateView());
__ Push(r0);
__ Move(test_case.object, r1);
Register src_object = test_case.object;
Register dst_object = test_case.dst_object;
Register dst_slot = test_case.dst_slot;
Operand offset_operand(0);
if (test_case.offset_register == no_reg) {
offset_operand = Operand(offset);
} else {
__ mov(test_case.offset_register, Operand(offset));
offset_operand = Operand(test_case.offset_register);
}
std::stringstream comment;
comment << "-- " << test_case.comment << ": MoveObjectAndSlot("
<< dst_object << ", " << dst_slot << ", " << src_object << ", ";
if (test_case.offset_register == no_reg) {
comment << "#" << offset;
} else {
comment << test_case.offset_register;
}
comment << ") --";
__ RecordComment(comment.str().c_str());
__ MoveObjectAndSlot(dst_object, dst_slot, src_object, offset_operand);
__ RecordComment("--");
// The `result` pointer was saved on the stack.
UseScratchRegisterScope temps(&masm);
Register scratch = temps.Acquire();
__ Pop(scratch);
__ str(dst_object, MemOperand(scratch));
__ str(dst_slot, MemOperand(scratch, kSystemPointerSize));
__ Ret();
CodeDesc desc;
masm.GetCode(nullptr, &desc);
if (v8_flags.print_code) {
Handle<Code> code =
Factory::CodeBuilder(isolate(), desc, CodeKind::FOR_TESTING).Build();
StdoutStream os;
code->Print(os);
}
buffer->MakeExecutable();
// We need an isolate here to execute in the simulator.
auto f = GeneratedCode<void, byte**, byte*>::FromBuffer(isolate(),
buffer->start());
byte* object = new byte[offset];
byte* result[] = {nullptr, nullptr};
f.Call(result, object);
// The first element must be the address of the object, and the second the
// slot addressed by `offset`.
EXPECT_EQ(result[0], &object[0]);
EXPECT_EQ(result[1], &object[offset]);
delete[] object;
}
}
INSTANTIATE_TEST_SUITE_P(MacroAssemblerTest,
MacroAssemblerTestMoveObjectAndSlot,
::testing::ValuesIn(kMoveObjectAndSlotTestCases));
#undef __
#undef ERROR_MESSAGE
} // namespace internal
} // namespace v8
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