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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <memory>
#include <vector>
#include "arch/instruction_set.h"
#include "cfi_test.h"
#include "gtest/gtest.h"
#include "optimizing/code_generator.h"
#include "optimizing/optimizing_unit_test.h"
#include "utils/assembler.h"
#include "utils/arm/assembler_thumb2.h"
#include "utils/mips/assembler_mips.h"
#include "utils/mips64/assembler_mips64.h"
#include "optimizing/optimizing_cfi_test_expected.inc"
namespace art {
// Run the tests only on host.
#ifndef __ANDROID__
class OptimizingCFITest : public CFITest {
public:
// Enable this flag to generate the expected outputs.
static constexpr bool kGenerateExpected = false;
OptimizingCFITest()
: pool_(),
allocator_(&pool_),
opts_(),
isa_features_(),
graph_(nullptr),
code_gen_(),
blocks_(allocator_.Adapter()) {}
void SetUpFrame(InstructionSet isa) {
// Setup simple context.
std::string error;
isa_features_.reset(InstructionSetFeatures::FromVariant(isa, "default", &error));
graph_ = CreateGraph(&allocator_);
// Generate simple frame with some spills.
code_gen_.reset(CodeGenerator::Create(graph_, isa, *isa_features_, opts_));
code_gen_->GetAssembler()->cfi().SetEnabled(true);
const int frame_size = 64;
int core_reg = 0;
int fp_reg = 0;
for (int i = 0; i < 2; i++) { // Two registers of each kind.
for (; core_reg < 32; core_reg++) {
if (code_gen_->IsCoreCalleeSaveRegister(core_reg)) {
auto location = Location::RegisterLocation(core_reg);
code_gen_->AddAllocatedRegister(location);
core_reg++;
break;
}
}
for (; fp_reg < 32; fp_reg++) {
if (code_gen_->IsFloatingPointCalleeSaveRegister(fp_reg)) {
auto location = Location::FpuRegisterLocation(fp_reg);
code_gen_->AddAllocatedRegister(location);
fp_reg++;
break;
}
}
}
code_gen_->block_order_ = &blocks_;
code_gen_->ComputeSpillMask();
code_gen_->SetFrameSize(frame_size);
code_gen_->GenerateFrameEntry();
}
void Finish() {
code_gen_->GenerateFrameExit();
code_gen_->Finalize(&code_allocator_);
}
void Check(InstructionSet isa,
const char* isa_str,
const std::vector<uint8_t>& expected_asm,
const std::vector<uint8_t>& expected_cfi) {
// Get the outputs.
const std::vector<uint8_t>& actual_asm = code_allocator_.GetMemory();
Assembler* opt_asm = code_gen_->GetAssembler();
const std::vector<uint8_t>& actual_cfi = *(opt_asm->cfi().data());
if (kGenerateExpected) {
GenerateExpected(stdout, isa, isa_str, actual_asm, actual_cfi);
} else {
EXPECT_EQ(expected_asm, actual_asm);
EXPECT_EQ(expected_cfi, actual_cfi);
}
}
void TestImpl(InstructionSet isa, const char*
isa_str,
const std::vector<uint8_t>& expected_asm,
const std::vector<uint8_t>& expected_cfi) {
SetUpFrame(isa);
Finish();
Check(isa, isa_str, expected_asm, expected_cfi);
}
CodeGenerator* GetCodeGenerator() {
return code_gen_.get();
}
private:
class InternalCodeAllocator : public CodeAllocator {
public:
InternalCodeAllocator() {}
virtual uint8_t* Allocate(size_t size) {
memory_.resize(size);
return memory_.data();
}
const std::vector<uint8_t>& GetMemory() { return memory_; }
private:
std::vector<uint8_t> memory_;
DISALLOW_COPY_AND_ASSIGN(InternalCodeAllocator);
};
ArenaPool pool_;
ArenaAllocator allocator_;
CompilerOptions opts_;
std::unique_ptr<const InstructionSetFeatures> isa_features_;
HGraph* graph_;
std::unique_ptr<CodeGenerator> code_gen_;
ArenaVector<HBasicBlock*> blocks_;
InternalCodeAllocator code_allocator_;
};
#define TEST_ISA(isa) \
TEST_F(OptimizingCFITest, isa) { \
std::vector<uint8_t> expected_asm( \
expected_asm_##isa, \
expected_asm_##isa + arraysize(expected_asm_##isa)); \
std::vector<uint8_t> expected_cfi( \
expected_cfi_##isa, \
expected_cfi_##isa + arraysize(expected_cfi_##isa)); \
TestImpl(isa, #isa, expected_asm, expected_cfi); \
}
TEST_ISA(kThumb2)
TEST_ISA(kArm64)
TEST_ISA(kX86)
TEST_ISA(kX86_64)
TEST_ISA(kMips)
TEST_ISA(kMips64)
TEST_F(OptimizingCFITest, kThumb2Adjust) {
std::vector<uint8_t> expected_asm(
expected_asm_kThumb2_adjust,
expected_asm_kThumb2_adjust + arraysize(expected_asm_kThumb2_adjust));
std::vector<uint8_t> expected_cfi(
expected_cfi_kThumb2_adjust,
expected_cfi_kThumb2_adjust + arraysize(expected_cfi_kThumb2_adjust));
SetUpFrame(kThumb2);
#define __ down_cast<arm::Thumb2Assembler*>(GetCodeGenerator()->GetAssembler())->
Label target;
__ CompareAndBranchIfZero(arm::R0, &target);
// Push the target out of range of CBZ.
for (size_t i = 0; i != 65; ++i) {
__ ldr(arm::R0, arm::Address(arm::R0));
}
__ Bind(&target);
#undef __
Finish();
Check(kThumb2, "kThumb2_adjust", expected_asm, expected_cfi);
}
TEST_F(OptimizingCFITest, kMipsAdjust) {
// One NOP in delay slot, 1 << 15 NOPS have size 1 << 17 which exceeds 18-bit signed maximum.
static constexpr size_t kNumNops = 1u + (1u << 15);
std::vector<uint8_t> expected_asm(
expected_asm_kMips_adjust_head,
expected_asm_kMips_adjust_head + arraysize(expected_asm_kMips_adjust_head));
expected_asm.resize(expected_asm.size() + kNumNops * 4u, 0u);
expected_asm.insert(
expected_asm.end(),
expected_asm_kMips_adjust_tail,
expected_asm_kMips_adjust_tail + arraysize(expected_asm_kMips_adjust_tail));
std::vector<uint8_t> expected_cfi(
expected_cfi_kMips_adjust,
expected_cfi_kMips_adjust + arraysize(expected_cfi_kMips_adjust));
SetUpFrame(kMips);
#define __ down_cast<mips::MipsAssembler*>(GetCodeGenerator()->GetAssembler())->
mips::MipsLabel target;
__ Beqz(mips::A0, &target);
// Push the target out of range of BEQZ.
for (size_t i = 0; i != kNumNops; ++i) {
__ Nop();
}
__ Bind(&target);
#undef __
Finish();
Check(kMips, "kMips_adjust", expected_asm, expected_cfi);
}
TEST_F(OptimizingCFITest, kMips64Adjust) {
// One NOP in forbidden slot, 1 << 15 NOPS have size 1 << 17 which exceeds 18-bit signed maximum.
static constexpr size_t kNumNops = 1u + (1u << 15);
std::vector<uint8_t> expected_asm(
expected_asm_kMips64_adjust_head,
expected_asm_kMips64_adjust_head + arraysize(expected_asm_kMips64_adjust_head));
expected_asm.resize(expected_asm.size() + kNumNops * 4u, 0u);
expected_asm.insert(
expected_asm.end(),
expected_asm_kMips64_adjust_tail,
expected_asm_kMips64_adjust_tail + arraysize(expected_asm_kMips64_adjust_tail));
std::vector<uint8_t> expected_cfi(
expected_cfi_kMips64_adjust,
expected_cfi_kMips64_adjust + arraysize(expected_cfi_kMips64_adjust));
SetUpFrame(kMips64);
#define __ down_cast<mips64::Mips64Assembler*>(GetCodeGenerator()->GetAssembler())->
mips64::Mips64Label target;
__ Beqc(mips64::A1, mips64::A2, &target);
// Push the target out of range of BEQC.
for (size_t i = 0; i != kNumNops; ++i) {
__ Nop();
}
__ Bind(&target);
#undef __
Finish();
Check(kMips64, "kMips64_adjust", expected_asm, expected_cfi);
}
#endif // __ANDROID__
} // namespace art
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