150 lines · cpp
1//===- llvm/unittest/DebugInfo/DWARFExpressionCompactPrinterTest.cpp ------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "DwarfGenerator.h"10#include "llvm/ADT/ArrayRef.h"11#include "llvm/DebugInfo/DWARF/DWARFContext.h"12#include "llvm/DebugInfo/DWARF/DWARFDie.h"13#include "llvm/DebugInfo/DWARF/DWARFExpressionPrinter.h"14#include "llvm/DebugInfo/DWARF/LowLevel/DWARFExpression.h"15#include "llvm/MC/MCInstrInfo.h"16#include "llvm/MC/MCRegisterInfo.h"17#include "llvm/MC/TargetRegistry.h"18#include "llvm/Support/DataExtractor.h"19#include "llvm/Support/TargetSelect.h"20#include "llvm/Testing/Support/Error.h"21#include "gtest/gtest.h"22 23using namespace llvm;24using namespace dwarf;25 26namespace {27class DWARFExpressionCompactPrinterTest : public ::testing::Test {28public:29 std::unique_ptr<MCRegisterInfo> MRI;30 31 DWARFExpressionCompactPrinterTest() {32 InitializeAllTargets();33 InitializeAllTargetMCs();34 InitializeAllAsmPrinters();35 36 Triple TT("armv8a-linux-gnueabi");37 std::string ErrorStr;38 39 const Target *TheTarget = TargetRegistry::lookupTarget(TT, ErrorStr);40 41 if (!TheTarget)42 return;43 44 MRI.reset(TheTarget->createMCRegInfo(TT));45 }46 47 void TestExprPrinter(ArrayRef<uint8_t> ExprData, StringRef Expected);48};49} // namespace50 51void DWARFExpressionCompactPrinterTest::TestExprPrinter(52 ArrayRef<uint8_t> ExprData, StringRef Expected) {53 // If we didn't build ARM, do not run the test.54 if (!MRI)55 GTEST_SKIP();56 57 // Print the expression, passing in the subprogram DIE, and check that the58 // result is as expected.59 std::string Result;60 raw_string_ostream OS(Result);61 DataExtractor DE(ExprData, true, 8);62 DWARFExpression Expr(DE, 8);63 64 auto GetRegName = [&](uint64_t DwarfRegNum, bool IsEH) -> StringRef {65 if (std::optional<MCRegister> LLVMRegNum =66 this->MRI->getLLVMRegNum(DwarfRegNum, IsEH))67 if (const char *RegName = this->MRI->getName(*LLVMRegNum))68 return llvm::StringRef(RegName);69 OS << "<unknown register " << DwarfRegNum << ">";70 return {};71 };72 73 printDwarfExpressionCompact(&Expr, OS, GetRegName);74 EXPECT_EQ(OS.str(), Expected);75}76 77TEST_F(DWARFExpressionCompactPrinterTest, Test_OP_reg0) {78 TestExprPrinter({DW_OP_reg0}, "R0");79}80 81TEST_F(DWARFExpressionCompactPrinterTest, Test_OP_reg10) {82 TestExprPrinter({DW_OP_reg10}, "R10");83}84 85TEST_F(DWARFExpressionCompactPrinterTest, Test_OP_regx) {86 TestExprPrinter({DW_OP_regx, 0x80, 0x02}, "D0");87}88 89TEST_F(DWARFExpressionCompactPrinterTest, Test_OP_breg0) {90 TestExprPrinter({DW_OP_breg0, 0x04}, "[R0+4]");91}92 93TEST_F(DWARFExpressionCompactPrinterTest, Test_OP_breg0_large_offset) {94 TestExprPrinter({DW_OP_breg0, 0x80, 0x02}, "[R0+256]");95}96 97TEST_F(DWARFExpressionCompactPrinterTest, Test_OP_breg13) {98 TestExprPrinter({DW_OP_breg13, 0x10}, "[SP+16]");99}100 101TEST_F(DWARFExpressionCompactPrinterTest, Test_OP_breg13_zero_offset) {102 TestExprPrinter({DW_OP_breg13, 0x00}, "[SP]");103}104 105TEST_F(DWARFExpressionCompactPrinterTest, Test_OP_breg0_negative) {106 TestExprPrinter({DW_OP_breg0, 0x70}, "[R0-16]");107}108 109TEST_F(DWARFExpressionCompactPrinterTest, Test_OP_bregx) {110 TestExprPrinter({DW_OP_bregx, 0x0d, 0x28}, "[SP+40]");111}112 113TEST_F(DWARFExpressionCompactPrinterTest, Test_OP_stack_value) {114 TestExprPrinter({DW_OP_breg13, 0x04, DW_OP_stack_value}, "SP+4");115}116 117TEST_F(DWARFExpressionCompactPrinterTest, Test_OP_entry_value) {118 TestExprPrinter({DW_OP_entry_value, 0x01, DW_OP_reg0, DW_OP_stack_value},119 "entry(R0)");120}121 122TEST_F(DWARFExpressionCompactPrinterTest, Test_OP_entry_value_mem) {123 TestExprPrinter(124 {DW_OP_entry_value, 0x02, DW_OP_breg13, 0x10, DW_OP_stack_value},125 "entry([SP+16])");126}127 128TEST_F(DWARFExpressionCompactPrinterTest, Test_OP_nop) {129 TestExprPrinter({DW_OP_nop}, "<stack of size 0, expected 1>");130}131 132TEST_F(DWARFExpressionCompactPrinterTest, Test_OP_LLVM_nop) {133 TestExprPrinter({DW_OP_LLVM_user, DW_OP_LLVM_nop},134 "<stack of size 0, expected 1>");135}136 137TEST_F(DWARFExpressionCompactPrinterTest, Test_OP_nop_OP_reg) {138 TestExprPrinter({DW_OP_nop, DW_OP_reg0}, "R0");139}140 141TEST_F(DWARFExpressionCompactPrinterTest, Test_OP_LLVM_nop_OP_reg) {142 TestExprPrinter({DW_OP_LLVM_user, DW_OP_LLVM_nop, DW_OP_reg0}, "R0");143}144 145TEST_F(DWARFExpressionCompactPrinterTest, Test_OP_LLVM_user_unknown_subop) {146 TestExprPrinter({DW_OP_LLVM_user, DW_OP_LLVM_form_aspace_address},147 "<unknown op DW_OP_LLVM_user (233) subop "148 "DW_OP_LLVM_form_aspace_address (2)>");149}150