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llvm-mirror/unittests/DebugInfo/DWARF/DWARFDebugLineTest.cpp
James Henderson 32f8985d4a [DebugInfo][test] Attempt to fix big endian build bots 
Commit 9782c922c broke them since it prints raw bytes, whose order will
be different dependent on the endianness of the host.
2020-06-23 12:34:27 +01:00

1655 lines
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//===- DWARFDebugLineTest.cpp ---------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "DwarfGenerator.h"
#include "DwarfUtils.h"
#include "llvm/DebugInfo/DWARF/DWARFContext.h"
#include "llvm/DebugInfo/DWARF/DWARFDebugLine.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Testing/Support/Error.h"
#include "gtest/gtest.h"
using namespace llvm;
using namespace dwarf;
using namespace dwarfgen;
using namespace object;
using namespace utils;
using namespace testing;
namespace {
struct CommonFixture {
CommonFixture()
: LineData("", true, 0), Recoverable(Error::success()),
RecordRecoverable(std::bind(&CommonFixture::recordRecoverable, this,
std::placeholders::_1)),
Unrecoverable(Error::success()),
RecordUnrecoverable(std::bind(&CommonFixture::recordUnrecoverable, this,
std::placeholders::_1)){};
~CommonFixture() {
EXPECT_FALSE(Recoverable);
EXPECT_FALSE(Unrecoverable);
}
bool setupGenerator(uint16_t Version = 4, uint8_t AddrSize = 8) {
AddressSize = AddrSize;
Triple T =
getDefaultTargetTripleForAddrSize(AddressSize == 0 ? 8 : AddressSize);
if (!isConfigurationSupported(T))
return false;
auto ExpectedGenerator = Generator::create(T, Version);
if (ExpectedGenerator)
Gen.reset(ExpectedGenerator->release());
return true;
}
void generate() {
Context = createContext();
assert(Context != nullptr && "test state is not valid");
const DWARFObject &Obj = Context->getDWARFObj();
uint8_t TargetAddrSize = AddressSize == 0 ? 8 : AddressSize;
LineData = DWARFDataExtractor(
Obj, Obj.getLineSection(),
getDefaultTargetTripleForAddrSize(TargetAddrSize).isLittleEndian(),
AddressSize);
}
std::unique_ptr<DWARFContext> createContext() {
if (!Gen)
return nullptr;
StringRef FileBytes = Gen->generate();
MemoryBufferRef FileBuffer(FileBytes, "dwarf");
auto Obj = object::ObjectFile::createObjectFile(FileBuffer);
if (Obj)
return DWARFContext::create(**Obj);
return nullptr;
}
DWARFDebugLine::SectionParser setupParser() {
LineTable &LT = Gen->addLineTable(DWARF32);
LT.addExtendedOpcode(9, DW_LNE_set_address, {{0xadd4e55, LineTable::Quad}});
LT.addStandardOpcode(DW_LNS_copy, {});
LT.addByte(0xaa);
LT.addExtendedOpcode(1, DW_LNE_end_sequence, {});
LineTable &LT2 = Gen->addLineTable(DWARF64);
LT2.addExtendedOpcode(9, DW_LNE_set_address,
{{0x11223344, LineTable::Quad}});
LT2.addStandardOpcode(DW_LNS_copy, {});
LT2.addByte(0xbb);
LT2.addExtendedOpcode(1, DW_LNE_end_sequence, {});
generate();
return DWARFDebugLine::SectionParser(LineData, *Context, CUs, TUs);
}
void recordRecoverable(Error Err) {
Recoverable = joinErrors(std::move(Recoverable), std::move(Err));
}
void recordUnrecoverable(Error Err) {
Unrecoverable = joinErrors(std::move(Unrecoverable), std::move(Err));
}
Expected<const DWARFDebugLine::LineTable *>
getOrParseLineTableFatalErrors(uint64_t Offset = 0) {
auto ExpectedLineTable = Line.getOrParseLineTable(
LineData, Offset, *Context, nullptr, RecordRecoverable);
EXPECT_THAT_ERROR(std::move(Recoverable), Succeeded());
return ExpectedLineTable;
}
uint8_t AddressSize;
std::unique_ptr<Generator> Gen;
std::unique_ptr<DWARFContext> Context;
DWARFDataExtractor LineData;
DWARFDebugLine Line;
Error Recoverable;
std::function<void(Error)> RecordRecoverable;
Error Unrecoverable;
std::function<void(Error)> RecordUnrecoverable;
SmallVector<std::unique_ptr<DWARFUnit>, 2> CUs;
SmallVector<std::unique_ptr<DWARFUnit>, 2> TUs;
};
// Fixtures must derive from "Test", but parameterised fixtures from
// "TestWithParam". It does not seem possible to inherit from both, so we share
// the common state in a separate class, inherited by the two fixture classes.
struct DebugLineBasicFixture : public Test, public CommonFixture {};
struct DebugLineParameterisedFixture
: public TestWithParam<std::pair<uint16_t, DwarfFormat>>,
public CommonFixture {
void SetUp() { std::tie(Version, Format) = GetParam(); }
uint16_t Version;
DwarfFormat Format;
};
void checkDefaultPrologue(uint16_t Version, DwarfFormat Format,
DWARFDebugLine::Prologue Prologue,
uint64_t BodyLength) {
// Check version specific fields and values.
uint64_t UnitLength;
uint64_t PrologueLength;
switch (Version) {
case 4:
PrologueLength = 36;
UnitLength = PrologueLength + 2;
EXPECT_EQ(Prologue.MaxOpsPerInst, 1u);
break;
case 2:
case 3:
PrologueLength = 35;
UnitLength = PrologueLength + 2;
break;
case 5:
PrologueLength = 42;
UnitLength = PrologueLength + 4;
EXPECT_EQ(Prologue.getAddressSize(), 8u);
EXPECT_EQ(Prologue.SegSelectorSize, 0u);
break;
default:
llvm_unreachable("unsupported DWARF version");
}
UnitLength += BodyLength + (Format == DWARF32 ? 4 : 8);
EXPECT_EQ(Prologue.TotalLength, UnitLength);
EXPECT_EQ(Prologue.PrologueLength, PrologueLength);
EXPECT_EQ(Prologue.MinInstLength, 1u);
EXPECT_EQ(Prologue.DefaultIsStmt, 1u);
EXPECT_EQ(Prologue.LineBase, -5);
EXPECT_EQ(Prologue.LineRange, 14u);
EXPECT_EQ(Prologue.OpcodeBase, 13u);
std::vector<uint8_t> ExpectedLengths = {0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1};
EXPECT_EQ(Prologue.StandardOpcodeLengths, ExpectedLengths);
ASSERT_EQ(Prologue.IncludeDirectories.size(), 1u);
ASSERT_EQ(Prologue.IncludeDirectories[0].getForm(), DW_FORM_string);
EXPECT_STREQ(*Prologue.IncludeDirectories[0].getAsCString(), "a dir");
ASSERT_EQ(Prologue.FileNames.size(), 1u);
ASSERT_EQ(Prologue.FileNames[0].Name.getForm(), DW_FORM_string);
ASSERT_EQ(Prologue.FileNames[0].DirIdx, 0u);
EXPECT_STREQ(*Prologue.FileNames[0].Name.getAsCString(), "a file");
}
TEST_F(DebugLineBasicFixture, GetOrParseLineTableAtInvalidOffset) {
if (!setupGenerator())
return;
generate();
EXPECT_THAT_EXPECTED(
getOrParseLineTableFatalErrors(0),
FailedWithMessage(
"offset 0x00000000 is not a valid debug line section offset"));
// Repeat to show that an error is reported each time.
EXPECT_THAT_EXPECTED(
getOrParseLineTableFatalErrors(0),
FailedWithMessage(
"offset 0x00000000 is not a valid debug line section offset"));
// Show that an error is reported for later offsets too.
EXPECT_THAT_EXPECTED(
getOrParseLineTableFatalErrors(1),
FailedWithMessage(
"offset 0x00000001 is not a valid debug line section offset"));
}
TEST_F(DebugLineBasicFixture, GetOrParseLineTableAtInvalidOffsetAfterData) {
if (!setupGenerator())
return;
LineTable &LT = Gen->addLineTable();
LT.setCustomPrologue({{0, LineTable::Byte}});
generate();
EXPECT_THAT_EXPECTED(
getOrParseLineTableFatalErrors(0),
FailedWithMessage(
"parsing line table prologue at offset 0x00000000: "
"unexpected end of data at offset 0x1 while reading [0x0, 0x4)"));
EXPECT_THAT_EXPECTED(
getOrParseLineTableFatalErrors(1),
FailedWithMessage(
"offset 0x00000001 is not a valid debug line section offset"));
}
TEST_P(DebugLineParameterisedFixture, PrologueGetLength) {
if (!setupGenerator(Version))
return;
LineTable &LT = Gen->addLineTable(Format);
DWARFDebugLine::Prologue Prologue = LT.createBasicPrologue();
LT.setPrologue(Prologue);
generate();
// + 10 for sizes of DWARF-32 unit length, version, prologue length.
uint64_t ExpectedLength = Prologue.PrologueLength + 10;
if (Version == 5)
// Add address and segment selector size fields.
ExpectedLength += 2;
if (Format == DWARF64)
// Unit length grows by 8, prologue length by 4.
ExpectedLength += 12;
auto ExpectedLineTable = Line.getOrParseLineTable(LineData, 0, *Context,
nullptr, RecordRecoverable);
ASSERT_THAT_EXPECTED(ExpectedLineTable, Succeeded());
EXPECT_EQ((*ExpectedLineTable)->Prologue.getLength(), ExpectedLength);
}
TEST_P(DebugLineParameterisedFixture, GetOrParseLineTableValidTable) {
if (!setupGenerator(Version))
return;
SCOPED_TRACE("Checking Version " + std::to_string(Version) + ", Format " +
(Format == DWARF64 ? "DWARF64" : "DWARF32"));
LineTable &LT = Gen->addLineTable(Format);
LT.addExtendedOpcode(9, DW_LNE_set_address, {{0xadd4e55, LineTable::Quad}});
LT.addStandardOpcode(DW_LNS_copy, {});
LT.addByte(0xaa);
LT.addExtendedOpcode(1, DW_LNE_end_sequence, {});
LineTable &LT2 = Gen->addLineTable(Format);
LT2.addExtendedOpcode(9, DW_LNE_set_address, {{0x11223344, LineTable::Quad}});
LT2.addStandardOpcode(DW_LNS_copy, {});
LT2.addByte(0xbb);
LT2.addExtendedOpcode(1, DW_LNE_end_sequence, {});
LT2.addExtendedOpcode(9, DW_LNE_set_address, {{0x55667788, LineTable::Quad}});
LT2.addStandardOpcode(DW_LNS_copy, {});
LT2.addByte(0xcc);
LT2.addExtendedOpcode(1, DW_LNE_end_sequence, {});
generate();
auto ExpectedLineTable = Line.getOrParseLineTable(LineData, 0, *Context,
nullptr, RecordRecoverable);
ASSERT_TRUE(ExpectedLineTable.operator bool());
EXPECT_FALSE(Recoverable);
const DWARFDebugLine::LineTable *Expected = *ExpectedLineTable;
checkDefaultPrologue(Version, Format, Expected->Prologue, 16);
EXPECT_EQ(Expected->Sequences.size(), 1u);
uint64_t SecondOffset =
Expected->Prologue.sizeofTotalLength() + Expected->Prologue.TotalLength;
Recoverable = Error::success();
auto ExpectedLineTable2 = Line.getOrParseLineTable(
LineData, SecondOffset, *Context, nullptr, RecordRecoverable);
ASSERT_TRUE(ExpectedLineTable2.operator bool());
EXPECT_FALSE(Recoverable);
const DWARFDebugLine::LineTable *Expected2 = *ExpectedLineTable2;
checkDefaultPrologue(Version, Format, Expected2->Prologue, 32);
EXPECT_EQ(Expected2->Sequences.size(), 2u);
EXPECT_NE(Expected, Expected2);
// Check that if the same offset is requested, the exact same pointer is
// returned.
Recoverable = Error::success();
auto ExpectedLineTable3 = Line.getOrParseLineTable(
LineData, 0, *Context, nullptr, RecordRecoverable);
ASSERT_TRUE(ExpectedLineTable3.operator bool());
EXPECT_FALSE(Recoverable);
EXPECT_EQ(Expected, *ExpectedLineTable3);
Recoverable = Error::success();
auto ExpectedLineTable4 = Line.getOrParseLineTable(
LineData, SecondOffset, *Context, nullptr, RecordRecoverable);
ASSERT_TRUE(ExpectedLineTable4.operator bool());
EXPECT_FALSE(Recoverable);
EXPECT_EQ(Expected2, *ExpectedLineTable4);
// TODO: Add tests that show that the body of the programs have been read
// correctly.
}
TEST_F(DebugLineBasicFixture, ErrorForReservedLength) {
if (!setupGenerator())
return;
LineTable &LT = Gen->addLineTable();
LT.setCustomPrologue({{0xfffffff0, LineTable::Long}});
generate();
EXPECT_THAT_EXPECTED(
getOrParseLineTableFatalErrors(),
FailedWithMessage(
"parsing line table prologue at offset 0x00000000: unsupported "
"reserved unit length of value 0xfffffff0"));
}
struct DebugLineUnsupportedVersionFixture : public TestWithParam<uint16_t>,
public CommonFixture {
void SetUp() { Version = GetParam(); }
uint16_t Version;
};
TEST_P(DebugLineUnsupportedVersionFixture, ErrorForUnsupportedVersion) {
if (!setupGenerator())
return;
LineTable &LT = Gen->addLineTable();
LT.setCustomPrologue(
{{LineTable::Half, LineTable::Long}, {Version, LineTable::Half}});
generate();
EXPECT_THAT_EXPECTED(
getOrParseLineTableFatalErrors(),
FailedWithMessage("parsing line table prologue at offset 0x00000000: "
"unsupported version " +
std::to_string(Version)));
}
INSTANTIATE_TEST_CASE_P(UnsupportedVersionTestParams,
DebugLineUnsupportedVersionFixture,
Values(/*1 below min */ 1, /* 1 above max */ 6,
/* Maximum possible */ 0xffff), );
TEST_F(DebugLineBasicFixture, ErrorForInvalidV5IncludeDirTable) {
if (!setupGenerator(5))
return;
LineTable &LT = Gen->addLineTable();
LT.setCustomPrologue({
{19, LineTable::Long}, // unit length
{5, LineTable::Half}, // version
{8, LineTable::Byte}, // addr size
{0, LineTable::Byte}, // segment selector size
{11, LineTable::Long}, // prologue length
{1, LineTable::Byte}, // min instruction length
{1, LineTable::Byte}, // max ops per instruction
{1, LineTable::Byte}, // default is_stmt
{0, LineTable::Byte}, // line base
{14, LineTable::Byte}, // line range
{2, LineTable::Byte}, // opcode base (small to reduce the amount of
// setup required).
{0, LineTable::Byte}, // standard opcode lengths
{0, LineTable::Byte}, // directory entry format count (should not be
// zero).
{0, LineTable::ULEB}, // directories count
{0, LineTable::Byte}, // file name entry format count
{0, LineTable::ULEB} // file name entry count
});
generate();
auto ExpectedLineTable = Line.getOrParseLineTable(LineData, 0, *Context,
nullptr, RecordRecoverable);
EXPECT_THAT_EXPECTED(ExpectedLineTable, Succeeded());
EXPECT_THAT_ERROR(
std::move(Recoverable),
FailedWithMessage(
"parsing line table prologue at 0x00000000 found an invalid "
"directory or file table description at 0x00000014",
"failed to parse entry content descriptions because no path was "
"found"));
}
TEST_P(DebugLineParameterisedFixture, ErrorForTooLargePrologueLength) {
if (!setupGenerator(Version))
return;
SCOPED_TRACE("Checking Version " + std::to_string(Version) + ", Format " +
(Format == DWARF64 ? "DWARF64" : "DWARF32"));
LineTable &LT = Gen->addLineTable(Format);
DWARFDebugLine::Prologue Prologue = LT.createBasicPrologue();
++Prologue.PrologueLength;
LT.setPrologue(Prologue);
generate();
auto ExpectedLineTable = Line.getOrParseLineTable(LineData, 0, *Context,
nullptr, RecordRecoverable);
ASSERT_THAT_EXPECTED(ExpectedLineTable, Succeeded());
DWARFDebugLine::LineTable Result(**ExpectedLineTable);
// Undo the earlier modification so that it can be compared against a
// "default" prologue.
--Result.Prologue.PrologueLength;
checkDefaultPrologue(Version, Format, Result.Prologue, 0);
uint64_t ExpectedEnd =
Prologue.TotalLength + 1 + Prologue.sizeofTotalLength();
EXPECT_THAT_ERROR(
std::move(Recoverable),
FailedWithMessage(
("unknown data in line table prologue at offset 0x00000000: "
"parsing ended (at offset 0x000000" +
Twine::utohexstr(ExpectedEnd - 1) +
") before reaching the prologue end at offset 0x000000" +
Twine::utohexstr(ExpectedEnd))
.str()));
}
TEST_P(DebugLineParameterisedFixture, ErrorForTooShortPrologueLength) {
if (!setupGenerator(Version))
return;
SCOPED_TRACE("Checking Version " + std::to_string(Version) + ", Format " +
(Format == DWARF64 ? "DWARF64" : "DWARF32"));
LineTable &LT = Gen->addLineTable(Format);
DWARFDebugLine::Prologue Prologue = LT.createBasicPrologue();
Prologue.PrologueLength -= 2;
LT.setPrologue(Prologue);
generate();
auto ExpectedLineTable = Line.getOrParseLineTable(LineData, 0, *Context,
nullptr, RecordRecoverable);
ASSERT_THAT_EXPECTED(ExpectedLineTable, Succeeded());
DWARFDebugLine::LineTable Result(**ExpectedLineTable);
// Parsing will stop before reading a complete file entry.
ASSERT_EQ(Result.Prologue.IncludeDirectories.size(), 1u);
EXPECT_EQ(toStringRef(Result.Prologue.IncludeDirectories[0]), "a dir");
EXPECT_EQ(Result.Prologue.FileNames.size(), 0u);
// The exact place where the parsing will stop depends on the structure of the
// prologue and the last complete field we are able to read. Before V5 we stop
// before reading the file length. In V5, we stop before the filename.
uint64_t ExpectedEnd = Prologue.TotalLength + Prologue.sizeofTotalLength() -
(Version < 5 ? 2 : 8);
std::vector<std::string> Errs;
Errs.emplace_back(
(Twine("parsing line table prologue at 0x00000000 found an invalid "
"directory or file table description at 0x000000") +
Twine::utohexstr(ExpectedEnd))
.str());
if (Version < 5) {
Errs.emplace_back("file names table was not null terminated before the end "
"of the prologue");
} else {
Errs.emplace_back(
"failed to parse file entry because extracting the form value failed");
}
EXPECT_THAT_ERROR(std::move(Recoverable),
FailedWithMessageArray(testing::ElementsAreArray(Errs)));
}
INSTANTIATE_TEST_CASE_P(
LineTableTestParams, DebugLineParameterisedFixture,
Values(std::make_pair(
2, DWARF32), // Test lower-bound of v2-3 fields and DWARF32.
std::make_pair(3, DWARF32), // Test upper-bound of v2-3 fields.
std::make_pair(4, DWARF64), // Test v4 fields and DWARF64.
std::make_pair(5, DWARF32), std::make_pair(5, DWARF64)), );
TEST_F(DebugLineBasicFixture, ErrorForExtendedOpcodeLengthSmallerThanExpected) {
if (!setupGenerator())
return;
LineTable &LT = Gen->addLineTable();
LT.addByte(0xaa);
// The Length should be 1 + sizeof(ULEB) for a set discriminator opcode.
// The operand will be read for both the discriminator opcode and then parsed
// again as DW_LNS_negate_stmt, to respect the claimed length.
LT.addExtendedOpcode(1, DW_LNE_set_discriminator,
{{DW_LNS_negate_stmt, LineTable::ULEB}});
LT.addByte(0xbb);
LT.addStandardOpcode(DW_LNS_const_add_pc, {});
LT.addExtendedOpcode(1, DW_LNE_end_sequence, {});
generate();
auto ExpectedLineTable = Line.getOrParseLineTable(LineData, 0, *Context,
nullptr, RecordRecoverable);
EXPECT_THAT_ERROR(std::move(Recoverable),
FailedWithMessage("unexpected line op length at offset "
"0x00000031 expected 0x01 found 0x02"));
ASSERT_THAT_EXPECTED(ExpectedLineTable, Succeeded());
ASSERT_EQ((*ExpectedLineTable)->Rows.size(), 3u);
EXPECT_EQ((*ExpectedLineTable)->Sequences.size(), 1u);
EXPECT_EQ((*ExpectedLineTable)->Rows[1].IsStmt, 0u);
EXPECT_EQ((*ExpectedLineTable)->Rows[1].Discriminator, DW_LNS_negate_stmt);
}
TEST_F(DebugLineBasicFixture, ErrorForExtendedOpcodeLengthLargerThanExpected) {
if (!setupGenerator())
return;
LineTable &LT = Gen->addLineTable();
LT.addByte(0xaa);
LT.addStandardOpcode(DW_LNS_const_add_pc, {});
// The Length should be 1 for an end sequence opcode.
LT.addExtendedOpcode(2, DW_LNE_end_sequence, {});
// The negate statement opcode will be skipped.
LT.addStandardOpcode(DW_LNS_negate_stmt, {});
LT.addByte(0xbb);
LT.addStandardOpcode(DW_LNS_const_add_pc, {});
LT.addExtendedOpcode(1, DW_LNE_end_sequence, {});
generate();
auto ExpectedLineTable = Line.getOrParseLineTable(LineData, 0, *Context,
nullptr, RecordRecoverable);
EXPECT_THAT_ERROR(std::move(Recoverable),
FailedWithMessage("unexpected line op length at offset "
"0x00000032 expected 0x02 found 0x01"));
ASSERT_THAT_EXPECTED(ExpectedLineTable, Succeeded());
ASSERT_EQ((*ExpectedLineTable)->Rows.size(), 4u);
EXPECT_EQ((*ExpectedLineTable)->Sequences.size(), 2u);
ASSERT_EQ((*ExpectedLineTable)->Sequences[1].FirstRowIndex, 2u);
EXPECT_EQ((*ExpectedLineTable)->Rows[2].IsStmt, 1u);
}
TEST_F(DebugLineBasicFixture, ErrorForUnitLengthTooLarge) {
if (!setupGenerator())
return;
LineTable &Padding = Gen->addLineTable();
// Add some padding to show that a non-zero offset is handled correctly.
Padding.setCustomPrologue({{0, LineTable::Byte}});
LineTable &LT = Gen->addLineTable();
LT.addStandardOpcode(DW_LNS_copy, {});
LT.addStandardOpcode(DW_LNS_const_add_pc, {});
LT.addExtendedOpcode(1, DW_LNE_end_sequence, {});
DWARFDebugLine::Prologue Prologue = LT.createBasicPrologue();
// Set the total length to 1 higher than the actual length.
++Prologue.TotalLength;
LT.setPrologue(Prologue);
generate();
auto ExpectedLineTable = Line.getOrParseLineTable(LineData, 1, *Context,
nullptr, RecordRecoverable);
EXPECT_THAT_ERROR(
std::move(Recoverable),
FailedWithMessage("line table program with offset 0x00000001 has length "
"0x00000034 but only 0x00000033 bytes are available"));
ASSERT_THAT_EXPECTED(ExpectedLineTable, Succeeded());
EXPECT_EQ((*ExpectedLineTable)->Rows.size(), 2u);
EXPECT_EQ((*ExpectedLineTable)->Sequences.size(), 1u);
}
TEST_F(DebugLineBasicFixture, ErrorForMismatchedAddressSize) {
if (!setupGenerator(4, 8))
return;
LineTable &LT = Gen->addLineTable();
// The line data extractor expects size 8 (Quad) addresses.
uint64_t Addr1 = 0x11223344;
LT.addExtendedOpcode(5, DW_LNE_set_address, {{Addr1, LineTable::Long}});
LT.addStandardOpcode(DW_LNS_copy, {});
// Show that the expected address size is unchanged, so later valid lines
// don't cause a problem.
uint64_t Addr2 = 0x1122334455667788;
LT.addExtendedOpcode(9, DW_LNE_set_address, {{Addr2, LineTable::Quad}});
LT.addExtendedOpcode(1, DW_LNE_end_sequence, {});
generate();
auto ExpectedLineTable = Line.getOrParseLineTable(LineData, 0, *Context,
nullptr, RecordRecoverable);
EXPECT_THAT_ERROR(std::move(Recoverable),
FailedWithMessage("mismatching address size at offset "
"0x00000030 expected 0x08 found 0x04"));
ASSERT_THAT_EXPECTED(ExpectedLineTable, Succeeded());
ASSERT_EQ((*ExpectedLineTable)->Rows.size(), 2u);
EXPECT_EQ((*ExpectedLineTable)->Sequences.size(), 1u);
EXPECT_EQ((*ExpectedLineTable)->Rows[0].Address.Address, Addr1);
EXPECT_EQ((*ExpectedLineTable)->Rows[1].Address.Address, Addr2);
}
TEST_F(DebugLineBasicFixture,
ErrorForMismatchedAddressSizeUnsetInitialAddress) {
if (!setupGenerator(4, 0))
return;
LineTable &LT = Gen->addLineTable();
uint64_t Addr1 = 0x11223344;
LT.addExtendedOpcode(5, DW_LNE_set_address, {{Addr1, LineTable::Long}});
LT.addStandardOpcode(DW_LNS_copy, {});
uint64_t Addr2 = 0x1122334455667788;
LT.addExtendedOpcode(9, DW_LNE_set_address, {{Addr2, LineTable::Quad}});
LT.addExtendedOpcode(1, DW_LNE_end_sequence, {});
generate();
auto ExpectedLineTable = Line.getOrParseLineTable(LineData, 0, *Context,
nullptr, RecordRecoverable);
EXPECT_THAT_ERROR(std::move(Recoverable),
FailedWithMessage("mismatching address size at offset "
"0x00000038 expected 0x04 found 0x08"));
ASSERT_THAT_EXPECTED(ExpectedLineTable, Succeeded());
ASSERT_EQ((*ExpectedLineTable)->Rows.size(), 2u);
EXPECT_EQ((*ExpectedLineTable)->Sequences.size(), 1u);
EXPECT_EQ((*ExpectedLineTable)->Rows[0].Address.Address, Addr1);
EXPECT_EQ((*ExpectedLineTable)->Rows[1].Address.Address, Addr2);
}
TEST_F(DebugLineBasicFixture,
ErrorForUnsupportedAddressSizeInSetAddressLength) {
// Use DWARF v4, and 0 for data extractor address size so that the address
// size is derived from the opcode length.
if (!setupGenerator(4, 0))
return;
LineTable &LT = Gen->addLineTable();
// 4 == length of the extended opcode, i.e. 1 for the opcode itself and 3 for
// the Half (2) + Byte (1) operand, representing the unsupported address size.
LT.addExtendedOpcode(4, DW_LNE_set_address,
{{0x1234, LineTable::Half}, {0x56, LineTable::Byte}});
LT.addStandardOpcode(DW_LNS_copy, {});
// Special opcode to ensure the address has changed between the first and last
// row in the sequence. Without this, the sequence will not be recorded.
LT.addByte(0xaa);
LT.addExtendedOpcode(1, DW_LNE_end_sequence, {});
generate();
auto ExpectedLineTable = Line.getOrParseLineTable(LineData, 0, *Context,
nullptr, RecordRecoverable);
EXPECT_THAT_ERROR(
std::move(Recoverable),
FailedWithMessage("address size 0x03 of DW_LNE_set_address opcode at "
"offset 0x00000030 is unsupported"));
ASSERT_THAT_EXPECTED(ExpectedLineTable, Succeeded());
ASSERT_EQ((*ExpectedLineTable)->Rows.size(), 3u);
EXPECT_EQ((*ExpectedLineTable)->Sequences.size(), 1u);
// Show that the set address opcode is ignored in this case.
EXPECT_EQ((*ExpectedLineTable)->Rows[0].Address.Address, 0u);
}
TEST_F(DebugLineBasicFixture, ErrorForAddressSizeGreaterThanByteSize) {
// Use DWARF v4, and 0 for data extractor address size so that the address
// size is derived from the opcode length.
if (!setupGenerator(4, 0))
return;
LineTable &LT = Gen->addLineTable();
// Specifically use an operand size that has a trailing byte of a supported
// size (8), so that any potential truncation would result in a valid size.
std::vector<LineTable::ValueAndLength> Operands(0x108);
LT.addExtendedOpcode(Operands.size() + 1, DW_LNE_set_address, Operands);
LT.addExtendedOpcode(1, DW_LNE_end_sequence, {});
generate();
auto ExpectedLineTable = Line.getOrParseLineTable(LineData, 0, *Context,
nullptr, RecordRecoverable);
EXPECT_THAT_ERROR(
std::move(Recoverable),
FailedWithMessage("address size 0x108 of DW_LNE_set_address opcode at "
"offset 0x00000031 is unsupported"));
ASSERT_THAT_EXPECTED(ExpectedLineTable, Succeeded());
}
TEST_F(DebugLineBasicFixture, ErrorForUnsupportedAddressSizeDefinedInHeader) {
// Use 0 for data extractor address size so that it does not clash with the
// header address size.
if (!setupGenerator(5, 0))
return;
LineTable &LT = Gen->addLineTable();
// AddressSize + 1 == length of the extended opcode, i.e. 1 for the opcode
// itself and 9 for the Quad (8) + Byte (1) operand representing the
// unsupported address size.
uint8_t AddressSize = 9;
LT.addExtendedOpcode(AddressSize + 1, DW_LNE_set_address,
{{0x12345678, LineTable::Quad}, {0, LineTable::Byte}});
LT.addStandardOpcode(DW_LNS_copy, {});
// Special opcode to ensure the address has changed between the first and last
// row in the sequence. Without this, the sequence will not be recorded.
LT.addByte(0xaa);
LT.addExtendedOpcode(1, DW_LNE_end_sequence, {});
DWARFDebugLine::Prologue Prologue = LT.createBasicPrologue();
Prologue.FormParams.AddrSize = AddressSize;
LT.setPrologue(Prologue);
generate();
auto ExpectedLineTable = Line.getOrParseLineTable(LineData, 0, *Context,
nullptr, RecordRecoverable);
EXPECT_THAT_ERROR(
std::move(Recoverable),
FailedWithMessage("address size 0x09 of DW_LNE_set_address opcode at "
"offset 0x00000038 is unsupported"));
ASSERT_THAT_EXPECTED(ExpectedLineTable, Succeeded());
ASSERT_EQ((*ExpectedLineTable)->Rows.size(), 3u);
EXPECT_EQ((*ExpectedLineTable)->Sequences.size(), 1u);
// Show that the set address opcode is ignored in this case.
EXPECT_EQ((*ExpectedLineTable)->Rows[0].Address.Address, 0u);
}
TEST_F(DebugLineBasicFixture, CallbackUsedForUnterminatedSequence) {
if (!setupGenerator())
return;
LineTable &LT = Gen->addLineTable();
LT.addExtendedOpcode(9, DW_LNE_set_address,
{{0x1122334455667788, LineTable::Quad}});
LT.addStandardOpcode(DW_LNS_copy, {});
LT.addByte(0xaa);
LT.addExtendedOpcode(1, DW_LNE_end_sequence, {});
LT.addExtendedOpcode(9, DW_LNE_set_address,
{{0x99aabbccddeeff00, LineTable::Quad}});
LT.addStandardOpcode(DW_LNS_copy, {});
LT.addByte(0xbb);
LT.addByte(0xcc);
generate();
auto ExpectedLineTable = Line.getOrParseLineTable(LineData, 0, *Context,
nullptr, RecordRecoverable);
EXPECT_THAT_ERROR(std::move(Recoverable),
FailedWithMessage("last sequence in debug line table at "
"offset 0x00000000 is not terminated"));
ASSERT_THAT_EXPECTED(ExpectedLineTable, Succeeded());
EXPECT_EQ((*ExpectedLineTable)->Rows.size(), 6u);
// The unterminated sequence is not added to the sequence list.
EXPECT_EQ((*ExpectedLineTable)->Sequences.size(), 1u);
}
struct AdjustAddressFixtureBase : public CommonFixture {
virtual ~AdjustAddressFixtureBase() {}
// Create and update the prologue as specified by the subclass, then return
// the length of the table.
virtual uint64_t editPrologue(LineTable &LT) = 0;
virtual uint64_t getAdjustedAddr(uint64_t Base, uint64_t ConstIncrs,
uint64_t SpecialIncrs,
uint64_t AdvanceIncrs) {
return Base + ConstIncrs + SpecialIncrs + AdvanceIncrs;
}
virtual uint64_t getAdjustedLine(uint64_t Base, uint64_t Incr) {
return Base + Incr;
}
uint64_t setupNoProblemTable() {
LineTable &NoProblem = Gen->addLineTable();
NoProblem.addExtendedOpcode(9, DW_LNE_set_address,
{{0xabcd, LineTable::Quad}});
NoProblem.addExtendedOpcode(1, DW_LNE_end_sequence, {});
return editPrologue(NoProblem);
}
uint64_t setupConstAddPcFirstTable() {
LineTable &ConstAddPCFirst = Gen->addLineTable();
ConstAddPCFirst.addExtendedOpcode(9, DW_LNE_set_address,
{{ConstAddPCAddr, LineTable::Quad}});
ConstAddPCFirst.addStandardOpcode(DW_LNS_const_add_pc, {});
ConstAddPCFirst.addStandardOpcode(DW_LNS_const_add_pc, {});
ConstAddPCFirst.addStandardOpcode(DW_LNS_advance_pc,
{{0x10, LineTable::ULEB}});
ConstAddPCFirst.addByte(0x21); // Special opcode, +1 op, +1 line.
ConstAddPCFirst.addExtendedOpcode(1, DW_LNE_end_sequence, {});
return editPrologue(ConstAddPCFirst);
}
uint64_t setupSpecialFirstTable() {
LineTable &SpecialFirst = Gen->addLineTable();
SpecialFirst.addExtendedOpcode(9, DW_LNE_set_address,
{{SpecialAddr, LineTable::Quad}});
SpecialFirst.addByte(0x22); // Special opcode, +1 op, +2 line.
SpecialFirst.addStandardOpcode(DW_LNS_const_add_pc, {});
SpecialFirst.addStandardOpcode(DW_LNS_advance_pc,
{{0x20, LineTable::ULEB}});
SpecialFirst.addByte(0x23); // Special opcode, +1 op, +3 line.
SpecialFirst.addExtendedOpcode(1, DW_LNE_end_sequence, {});
return editPrologue(SpecialFirst);
}
uint64_t setupAdvancePcFirstTable() {
LineTable &AdvancePCFirst = Gen->addLineTable();
AdvancePCFirst.addExtendedOpcode(9, DW_LNE_set_address,
{{AdvancePCAddr, LineTable::Quad}});
AdvancePCFirst.addStandardOpcode(DW_LNS_advance_pc,
{{0x30, LineTable::ULEB}});
AdvancePCFirst.addStandardOpcode(DW_LNS_const_add_pc, {});
AdvancePCFirst.addStandardOpcode(DW_LNS_advance_pc,
{{0x40, LineTable::ULEB}});
AdvancePCFirst.addByte(0x24); // Special opcode, +1 op, +4 line.
AdvancePCFirst.addExtendedOpcode(1, DW_LNE_end_sequence, {});
return editPrologue(AdvancePCFirst);
}
void setupTables(bool AddAdvancePCFirstTable) {
LineTable &Padding = Gen->addLineTable();
Padding.setCustomPrologue({{0, LineTable::Byte}});
NoProblemOffset = 1;
// Show that no warning is generated for the case where no
// DW_LNS_const_add_pc or special opcode is used.
ConstAddPCOffset = setupNoProblemTable() + NoProblemOffset;
// Show that the warning is emitted for the first DW_LNS_const_add_pc opcode
// and then not again.
SpecialOffset = setupConstAddPcFirstTable() + ConstAddPCOffset;
// Show that the warning is emitted for the first special opcode and then
// not again.
AdvancePCOffset = setupSpecialFirstTable() + SpecialOffset;
// Show that the warning is emitted for the first DW_LNS_advance_pc opcode
// (if requested) and then not again.
if (AddAdvancePCFirstTable)
setupAdvancePcFirstTable();
}
Expected<const DWARFDebugLine::LineTable *>
checkTable(uint64_t Offset, StringRef OpcodeType, const Twine &MsgSuffix) {
auto ExpectedTable = Line.getOrParseLineTable(LineData, Offset, *Context,
nullptr, RecordRecoverable);
EXPECT_THAT_ERROR(std::move(Unrecoverable), Succeeded());
if (!IsErrorExpected) {
EXPECT_THAT_ERROR(std::move(Recoverable), Succeeded());
} else {
if (!ExpectedTable)
return ExpectedTable;
uint64_t ExpectedOffset = Offset +
(*ExpectedTable)->Prologue.getLength() +
11; // 11 == size of DW_LNE_set_address.
std::string OffsetHex = Twine::utohexstr(Offset).str();
std::string OffsetZeroes = std::string(8 - OffsetHex.size(), '0');
std::string ExpectedHex = Twine::utohexstr(ExpectedOffset).str();
std::string ExpectedZeroes = std::string(8 - ExpectedHex.size(), '0');
EXPECT_THAT_ERROR(
std::move(Recoverable),
FailedWithMessage(("line table program at offset 0x" + OffsetZeroes +
OffsetHex + " contains a " + OpcodeType +
" opcode at offset 0x" + ExpectedZeroes +
ExpectedHex + ", " + MsgSuffix)
.str()));
}
return ExpectedTable;
}
void runTest(bool CheckAdvancePC, Twine MsgSuffix) {
if (!setupGenerator(Version))
return;
setupTables(/*AddAdvancePCFirstTable=*/CheckAdvancePC);
generate();
auto ExpectedNoProblem = Line.getOrParseLineTable(
LineData, NoProblemOffset, *Context, nullptr, RecordRecoverable);
EXPECT_THAT_ERROR(std::move(Recoverable), Succeeded());
EXPECT_THAT_ERROR(std::move(Unrecoverable), Succeeded());
ASSERT_THAT_EXPECTED(ExpectedNoProblem, Succeeded());
auto ExpectedConstAddPC =
checkTable(ConstAddPCOffset, "DW_LNS_const_add_pc", MsgSuffix);
ASSERT_THAT_EXPECTED(ExpectedConstAddPC, Succeeded());
ASSERT_EQ((*ExpectedConstAddPC)->Rows.size(), 2u);
EXPECT_EQ((*ExpectedConstAddPC)->Rows[0].Address.Address,
getAdjustedAddr(ConstAddPCAddr, ConstIncr * 2, 0x1, 0x10));
EXPECT_EQ((*ExpectedConstAddPC)->Rows[0].Line, getAdjustedLine(1, 1));
EXPECT_THAT_ERROR(std::move(Unrecoverable), Succeeded());
auto ExpectedSpecial = checkTable(SpecialOffset, "special", MsgSuffix);
ASSERT_THAT_EXPECTED(ExpectedSpecial, Succeeded());
ASSERT_EQ((*ExpectedSpecial)->Rows.size(), 3u);
EXPECT_EQ((*ExpectedSpecial)->Rows[0].Address.Address,
getAdjustedAddr(SpecialAddr, 0, 1, 0));
EXPECT_EQ((*ExpectedSpecial)->Rows[0].Line, getAdjustedLine(1, 2));
EXPECT_EQ((*ExpectedSpecial)->Rows[1].Address.Address,
getAdjustedAddr(SpecialAddr, ConstIncr, 0x2, 0x20));
EXPECT_EQ((*ExpectedSpecial)->Rows[1].Line, getAdjustedLine(1, 5));
EXPECT_THAT_ERROR(std::move(Unrecoverable), Succeeded());
if (!CheckAdvancePC)
return;
auto ExpectedAdvancePC =
checkTable(AdvancePCOffset, "DW_LNS_advance_pc", MsgSuffix);
ASSERT_THAT_EXPECTED(ExpectedAdvancePC, Succeeded());
ASSERT_EQ((*ExpectedAdvancePC)->Rows.size(), 2u);
EXPECT_EQ((*ExpectedAdvancePC)->Rows[0].Address.Address,
getAdjustedAddr(AdvancePCAddr, ConstIncr, 0x1, 0x70));
EXPECT_EQ((*ExpectedAdvancePC)->Rows[0].Line, getAdjustedLine(1, 4));
}
uint64_t ConstIncr = 0x11;
uint64_t ConstAddPCAddr = 0x1234;
uint64_t SpecialAddr = 0x5678;
uint64_t AdvancePCAddr = 0xabcd;
uint64_t NoProblemOffset;
uint64_t ConstAddPCOffset;
uint64_t SpecialOffset;
uint64_t AdvancePCOffset;
uint16_t Version = 4;
bool IsErrorExpected;
};
struct MaxOpsPerInstFixture
: TestWithParam<std::tuple<uint16_t, uint8_t, bool>>,
AdjustAddressFixtureBase {
void SetUp() override {
std::tie(Version, MaxOpsPerInst, IsErrorExpected) = GetParam();
}
uint64_t editPrologue(LineTable &LT) override {
DWARFDebugLine::Prologue Prologue = LT.createBasicPrologue();
Prologue.MaxOpsPerInst = MaxOpsPerInst;
LT.setPrologue(Prologue);
return Prologue.TotalLength + Prologue.sizeofTotalLength();
}
uint8_t MaxOpsPerInst;
};
TEST_P(MaxOpsPerInstFixture, MaxOpsPerInstProblemsReportedCorrectly) {
runTest(/*CheckAdvancePC=*/true,
"but the prologue maximum_operations_per_instruction value is " +
Twine(unsigned(MaxOpsPerInst)) +
", which is unsupported. Assuming a value of 1 instead");
}
INSTANTIATE_TEST_CASE_P(
MaxOpsPerInstParams, MaxOpsPerInstFixture,
Values(std::make_tuple(3, 0, false), // Test for version < 4 (no error).
std::make_tuple(4, 0, true), // Test zero value for V4 (error).
std::make_tuple(4, 1, false), // Test good value for V4 (no error).
std::make_tuple(
4, 2, true)), ); // Test one higher than permitted V4 (error).
struct LineRangeFixture : TestWithParam<std::tuple<uint8_t, bool>>,
AdjustAddressFixtureBase {
void SetUp() override { std::tie(LineRange, IsErrorExpected) = GetParam(); }
uint64_t editPrologue(LineTable &LT) override {
DWARFDebugLine::Prologue Prologue = LT.createBasicPrologue();
Prologue.LineRange = LineRange;
LT.setPrologue(Prologue);
return Prologue.TotalLength + Prologue.sizeofTotalLength();
}
uint64_t getAdjustedAddr(uint64_t Base, uint64_t ConstIncr,
uint64_t SpecialIncr,
uint64_t AdvanceIncr) override {
if (LineRange == 0)
return Base + AdvanceIncr;
return AdjustAddressFixtureBase::getAdjustedAddr(Base, ConstIncr,
SpecialIncr, AdvanceIncr);
}
uint64_t getAdjustedLine(uint64_t Base, uint64_t Incr) override {
return LineRange != 0
? AdjustAddressFixtureBase::getAdjustedLine(Base, Incr)
: Base;
}
uint8_t LineRange;
};
TEST_P(LineRangeFixture, LineRangeProblemsReportedCorrectly) {
runTest(/*CheckAdvancePC=*/false,
"but the prologue line_range value is 0. The address and line will "
"not be adjusted");
}
INSTANTIATE_TEST_CASE_P(
LineRangeParams, LineRangeFixture,
Values(std::make_tuple(0, true), // Test zero value (error).
std::make_tuple(14, false)), ); // Test non-zero value (no error).
struct BadMinInstLenFixture : TestWithParam<std::tuple<uint8_t, bool>>,
AdjustAddressFixtureBase {
void SetUp() override {
std::tie(MinInstLength, IsErrorExpected) = GetParam();
}
uint64_t editPrologue(LineTable &LT) override {
DWARFDebugLine::Prologue Prologue = LT.createBasicPrologue();
Prologue.MinInstLength = MinInstLength;
LT.setPrologue(Prologue);
return Prologue.TotalLength + Prologue.sizeofTotalLength();
}
uint64_t getAdjustedAddr(uint64_t Base, uint64_t ConstIncr,
uint64_t SpecialIncr,
uint64_t AdvanceIncr) override {
return MinInstLength != 0 ? AdjustAddressFixtureBase::getAdjustedAddr(
Base, ConstIncr, SpecialIncr, AdvanceIncr)
: Base;
}
uint8_t MinInstLength;
};
TEST_P(BadMinInstLenFixture, MinInstLengthProblemsReportedCorrectly) {
runTest(/*CheckAdvancePC=*/true,
"but the prologue minimum_instruction_length value is 0, which "
"prevents any address advancing");
}
INSTANTIATE_TEST_CASE_P(
BadMinInstLenParams, BadMinInstLenFixture,
Values(std::make_tuple(0, true), // Test zero value (error).
std::make_tuple(1, false)), ); // Test non-zero value (no error).
TEST_F(DebugLineBasicFixture, ParserParsesCorrectly) {
if (!setupGenerator())
return;
DWARFDebugLine::SectionParser Parser = setupParser();
EXPECT_EQ(Parser.getOffset(), 0u);
ASSERT_FALSE(Parser.done());
DWARFDebugLine::LineTable Parsed =
Parser.parseNext(RecordRecoverable, RecordUnrecoverable);
checkDefaultPrologue(4, DWARF32, Parsed.Prologue, 16);
EXPECT_EQ(Parsed.Sequences.size(), 1u);
EXPECT_EQ(Parser.getOffset(), 62u);
ASSERT_FALSE(Parser.done());
DWARFDebugLine::LineTable Parsed2 =
Parser.parseNext(RecordRecoverable, RecordUnrecoverable);
checkDefaultPrologue(4, DWARF64, Parsed2.Prologue, 16);
EXPECT_EQ(Parsed2.Sequences.size(), 1u);
EXPECT_EQ(Parser.getOffset(), 136u);
EXPECT_TRUE(Parser.done());
EXPECT_FALSE(Recoverable);
EXPECT_FALSE(Unrecoverable);
}
TEST_F(DebugLineBasicFixture, ParserSkipsCorrectly) {
if (!setupGenerator())
return;
DWARFDebugLine::SectionParser Parser = setupParser();
EXPECT_EQ(Parser.getOffset(), 0u);
ASSERT_FALSE(Parser.done());
Parser.skip(RecordRecoverable, RecordUnrecoverable);
EXPECT_EQ(Parser.getOffset(), 62u);
ASSERT_FALSE(Parser.done());
Parser.skip(RecordRecoverable, RecordUnrecoverable);
EXPECT_EQ(Parser.getOffset(), 136u);
EXPECT_TRUE(Parser.done());
EXPECT_FALSE(Recoverable);
EXPECT_FALSE(Unrecoverable);
}
TEST_F(DebugLineBasicFixture, ParserAlwaysDoneForEmptySection) {
if (!setupGenerator())
return;
generate();
DWARFDebugLine::SectionParser Parser(LineData, *Context, CUs, TUs);
EXPECT_TRUE(Parser.done());
}
TEST_F(DebugLineBasicFixture, ParserMarkedAsDoneForBadLengthWhenParsing) {
if (!setupGenerator())
return;
LineTable &LT = Gen->addLineTable();
LT.setCustomPrologue({{0xfffffff0, LineTable::Long}});
Gen->addLineTable();
generate();
DWARFDebugLine::SectionParser Parser(LineData, *Context, CUs, TUs);
Parser.parseNext(RecordRecoverable, RecordUnrecoverable);
EXPECT_EQ(Parser.getOffset(), 0u);
EXPECT_TRUE(Parser.done());
EXPECT_FALSE(Recoverable);
EXPECT_THAT_ERROR(
std::move(Unrecoverable),
FailedWithMessage(
"parsing line table prologue at offset 0x00000000: unsupported "
"reserved unit length of value 0xfffffff0"));
}
TEST_F(DebugLineBasicFixture, ParserMarkedAsDoneForBadLengthWhenSkipping) {
if (!setupGenerator())
return;
LineTable &LT = Gen->addLineTable();
LT.setCustomPrologue({{0xfffffff0, LineTable::Long}});
Gen->addLineTable();
generate();
DWARFDebugLine::SectionParser Parser(LineData, *Context, CUs, TUs);
Parser.skip(RecordRecoverable, RecordUnrecoverable);
EXPECT_EQ(Parser.getOffset(), 0u);
EXPECT_TRUE(Parser.done());
EXPECT_FALSE(Recoverable);
EXPECT_THAT_ERROR(
std::move(Unrecoverable),
FailedWithMessage(
"parsing line table prologue at offset 0x00000000: unsupported "
"reserved unit length of value 0xfffffff0"));
}
TEST_F(DebugLineBasicFixture, ParserReportsFirstErrorInEachTableWhenParsing) {
if (!setupGenerator())
return;
LineTable &LT = Gen->addLineTable(DWARF32);
LT.setCustomPrologue({{2, LineTable::Long}, {0, LineTable::Half}});
LineTable &LT2 = Gen->addLineTable(DWARF32);
LT2.setCustomPrologue({{2, LineTable::Long}, {1, LineTable::Half}});
generate();
DWARFDebugLine::SectionParser Parser(LineData, *Context, CUs, TUs);
Parser.parseNext(RecordRecoverable, RecordUnrecoverable);
ASSERT_FALSE(Parser.done());
Parser.parseNext(RecordRecoverable, RecordUnrecoverable);
EXPECT_TRUE(Parser.done());
EXPECT_THAT_ERROR(std::move(Recoverable), Succeeded());
EXPECT_THAT_ERROR(
std::move(Unrecoverable),
FailedWithMessage("parsing line table prologue at offset 0x00000000: "
"unsupported version 0",
"parsing line table prologue at offset 0x00000006: "
"unsupported version 1"));
}
TEST_F(DebugLineBasicFixture, ParserReportsNonPrologueProblemsWhenParsing) {
if (!setupGenerator())
return;
LineTable &LT = Gen->addLineTable(DWARF32);
LT.addExtendedOpcode(0x42, DW_LNE_end_sequence, {});
LineTable &LT2 = Gen->addLineTable(DWARF32);
LT2.addExtendedOpcode(9, DW_LNE_set_address,
{{0x1234567890abcdef, LineTable::Quad}});
LT2.addStandardOpcode(DW_LNS_copy, {});
LT2.addByte(0xbb);
generate();
DWARFDebugLine::SectionParser Parser(LineData, *Context, CUs, TUs);
Parser.parseNext(RecordRecoverable, RecordUnrecoverable);
EXPECT_FALSE(Unrecoverable);
ASSERT_FALSE(Parser.done());
EXPECT_THAT_ERROR(std::move(Recoverable),
FailedWithMessage("unexpected line op length at offset "
"0x00000030 expected 0x42 found 0x01"));
// Reset the error state so that it does not confuse the next set of checks.
Unrecoverable = Error::success();
Parser.parseNext(RecordRecoverable, RecordUnrecoverable);
EXPECT_TRUE(Parser.done());
EXPECT_THAT_ERROR(std::move(Recoverable),
FailedWithMessage("last sequence in debug line table at "
"offset 0x00000031 is not terminated"));
EXPECT_FALSE(Unrecoverable);
}
TEST_F(DebugLineBasicFixture,
ParserReportsPrologueErrorsInEachTableWhenSkipping) {
if (!setupGenerator())
return;
LineTable &LT = Gen->addLineTable(DWARF32);
LT.setCustomPrologue({{2, LineTable::Long}, {0, LineTable::Half}});
LineTable &LT2 = Gen->addLineTable(DWARF32);
LT2.setCustomPrologue({{2, LineTable::Long}, {1, LineTable::Half}});
generate();
DWARFDebugLine::SectionParser Parser(LineData, *Context, CUs, TUs);
Parser.skip(RecordRecoverable, RecordUnrecoverable);
ASSERT_FALSE(Parser.done());
Parser.skip(RecordRecoverable, RecordUnrecoverable);
EXPECT_TRUE(Parser.done());
EXPECT_FALSE(Recoverable);
EXPECT_THAT_ERROR(
std::move(Unrecoverable),
FailedWithMessage("parsing line table prologue at offset 0x00000000: "
"unsupported version 0",
"parsing line table prologue at offset 0x00000006: "
"unsupported version 1"));
}
TEST_F(DebugLineBasicFixture, ParserIgnoresNonPrologueErrorsWhenSkipping) {
if (!setupGenerator())
return;
LineTable &LT = Gen->addLineTable(DWARF32);
LT.addExtendedOpcode(42, DW_LNE_end_sequence, {});
generate();
DWARFDebugLine::SectionParser Parser(LineData, *Context, CUs, TUs);
Parser.skip(RecordRecoverable, RecordUnrecoverable);
EXPECT_TRUE(Parser.done());
EXPECT_FALSE(Recoverable);
EXPECT_FALSE(Unrecoverable);
}
TEST_F(DebugLineBasicFixture, VerboseOutput) {
if (!setupGenerator(5))
return;
LineTable &LT = Gen->addLineTable();
LT.addByte(0); // Extended opcode with zero length.
LT.addByte(0);
// Zero-value extended opcode.
LT.addExtendedOpcode(2, 0, {{1, LineTable::Byte}});
// Unknown extended opcode.
LT.addExtendedOpcode(2, 0x42, {{1, LineTable::Byte}});
LT.addExtendedOpcode(9, DW_LNE_set_address,
{{0x123456789abcdef, LineTable::Quad}});
LT.addExtendedOpcode(6, DW_LNE_define_file,
{{'a', LineTable::Byte},
{'\0', LineTable::Byte},
{2, LineTable::ULEB},
{3, LineTable::ULEB},
{4, LineTable::ULEB}});
LT.addExtendedOpcode(2, DW_LNE_set_discriminator, {{0x7f, LineTable::ULEB}});
LT.addStandardOpcode(DW_LNS_copy, {});
LT.addStandardOpcode(DW_LNS_advance_pc, {{11, LineTable::ULEB}});
LT.addStandardOpcode(DW_LNS_advance_line, {{22, LineTable::SLEB}});
LT.addStandardOpcode(DW_LNS_set_file, {{33, LineTable::ULEB}});
LT.addStandardOpcode(DW_LNS_set_column, {{44, LineTable::ULEB}});
LT.addStandardOpcode(DW_LNS_negate_stmt, {});
LT.addStandardOpcode(DW_LNS_set_basic_block, {});
LT.addStandardOpcode(DW_LNS_const_add_pc, {});
LT.addStandardOpcode(DW_LNS_fixed_advance_pc, {{55, LineTable::Half}});
LT.addStandardOpcode(DW_LNS_set_prologue_end, {});
LT.addStandardOpcode(DW_LNS_set_epilogue_begin, {});
LT.addStandardOpcode(DW_LNS_set_isa, {{66, LineTable::ULEB}});
// Add unknown standard opcode with operands.
LT.addStandardOpcode(
0xd, {{1, LineTable::ULEB}, {0x123456789abcdef, LineTable::ULEB}});
// Add unknown standard opcode without operands.
LT.addStandardOpcode(0xe, {});
LT.addByte(0xff); // Special opcode.
LT.addExtendedOpcode(1, DW_LNE_end_sequence, {});
// Adjust the prologue to account for the extra standard opcode.
DWARFDebugLine::Prologue Prologue = LT.createBasicPrologue();
Prologue.TotalLength += 2;
Prologue.PrologueLength += 2;
Prologue.OpcodeBase += 2;
Prologue.StandardOpcodeLengths.push_back(2);
Prologue.StandardOpcodeLengths.push_back(0);
LT.setPrologue(Prologue);
generate();
DWARFDebugLine::SectionParser Parser(LineData, *Context, CUs, TUs);
std::string Output;
raw_string_ostream OS(Output);
Parser.parseNext(RecordRecoverable, RecordUnrecoverable, &OS,
/*Verbose=*/true);
OS.flush();
StringRef OutputRef(Output);
size_t Pos = 0;
auto NextLine = [&Pos, &OutputRef]() {
size_t EOL = OutputRef.find_first_of('\n', Pos);
StringRef Line = OutputRef.substr(Pos, EOL - Pos);
Pos = EOL + 1;
return Line;
};
EXPECT_EQ(NextLine(), "Line table prologue:");
EXPECT_EQ(NextLine(), " total_length: 0x00000078");
EXPECT_EQ(NextLine(), " format: DWARF32");
EXPECT_EQ(NextLine(), " version: 5");
EXPECT_EQ(NextLine(), " address_size: 8");
EXPECT_EQ(NextLine(), " seg_select_size: 0");
EXPECT_EQ(NextLine(), " prologue_length: 0x0000002c");
EXPECT_EQ(NextLine(), " min_inst_length: 1");
EXPECT_EQ(NextLine(), "max_ops_per_inst: 1");
EXPECT_EQ(NextLine(), " default_is_stmt: 1");
EXPECT_EQ(NextLine(), " line_base: -5");
EXPECT_EQ(NextLine(), " line_range: 14");
EXPECT_EQ(NextLine(), " opcode_base: 15");
EXPECT_EQ(NextLine(), "standard_opcode_lengths[DW_LNS_copy] = 0");
EXPECT_EQ(NextLine(), "standard_opcode_lengths[DW_LNS_advance_pc] = 1");
EXPECT_EQ(NextLine(), "standard_opcode_lengths[DW_LNS_advance_line] = 1");
EXPECT_EQ(NextLine(), "standard_opcode_lengths[DW_LNS_set_file] = 1");
EXPECT_EQ(NextLine(), "standard_opcode_lengths[DW_LNS_set_column] = 1");
EXPECT_EQ(NextLine(), "standard_opcode_lengths[DW_LNS_negate_stmt] = 0");
EXPECT_EQ(NextLine(), "standard_opcode_lengths[DW_LNS_set_basic_block] = 0");
EXPECT_EQ(NextLine(), "standard_opcode_lengths[DW_LNS_const_add_pc] = 0");
EXPECT_EQ(NextLine(), "standard_opcode_lengths[DW_LNS_fixed_advance_pc] = 1");
EXPECT_EQ(NextLine(), "standard_opcode_lengths[DW_LNS_set_prologue_end] = 0");
EXPECT_EQ(NextLine(),
"standard_opcode_lengths[DW_LNS_set_epilogue_begin] = 0");
EXPECT_EQ(NextLine(), "standard_opcode_lengths[DW_LNS_set_isa] = 1");
EXPECT_EQ(NextLine(), "standard_opcode_lengths[DW_LNS_unknown_d] = 2");
EXPECT_EQ(NextLine(), "standard_opcode_lengths[DW_LNS_unknown_e] = 0");
EXPECT_EQ(NextLine(), "include_directories[ 0] = \"a dir\"");
EXPECT_EQ(NextLine(), "file_names[ 0]:");
EXPECT_EQ(NextLine(), " name: \"a file\"");
EXPECT_EQ(NextLine(), " dir_index: 0");
EXPECT_EQ(NextLine(), "");
EXPECT_EQ(NextLine(), " Address Line Column File ISA Discriminator Flags");
EXPECT_EQ(NextLine(), " ------------------ ------ ------ ------ --- ------------- -------------");
EXPECT_EQ(NextLine(),
"0x00000038: 00 Badly formed extended line op (length 0)");
EXPECT_EQ(NextLine(),
"0x0000003a: 00 Unrecognized extended op 0x00 length 2");
EXPECT_EQ(NextLine(),
"0x0000003e: 00 Unrecognized extended op 0x42 length 2");
EXPECT_EQ(NextLine(),
"0x00000042: 00 DW_LNE_set_address (0x0123456789abcdef)");
EXPECT_EQ(NextLine(), "0x0000004d: 00 DW_LNE_define_file (a, dir=2, "
"mod_time=(0x0000000000000003), length=4)");
EXPECT_EQ(NextLine(), "0x00000055: 00 DW_LNE_set_discriminator (127)");
EXPECT_EQ(NextLine(), "0x00000059: 01 DW_LNS_copy");
EXPECT_EQ(NextLine(), " 0x0123456789abcdef 1 0 1 "
"0 127 is_stmt");
EXPECT_EQ(NextLine(), "0x0000005a: 02 DW_LNS_advance_pc (11)");
EXPECT_EQ(NextLine(), "0x0000005c: 03 DW_LNS_advance_line (23)");
EXPECT_EQ(NextLine(), "0x0000005e: 04 DW_LNS_set_file (33)");
EXPECT_EQ(NextLine(), "0x00000060: 05 DW_LNS_set_column (44)");
EXPECT_EQ(NextLine(), "0x00000062: 06 DW_LNS_negate_stmt");
EXPECT_EQ(NextLine(), "0x00000063: 07 DW_LNS_set_basic_block");
EXPECT_EQ(NextLine(),
"0x00000064: 08 DW_LNS_const_add_pc (0x0000000000000011)");
EXPECT_EQ(NextLine(), "0x00000065: 09 DW_LNS_fixed_advance_pc (0x0037)");
EXPECT_EQ(NextLine(), "0x00000068: 0a DW_LNS_set_prologue_end");
EXPECT_EQ(NextLine(), "0x00000069: 0b DW_LNS_set_epilogue_begin");
EXPECT_EQ(NextLine(), "0x0000006a: 0c DW_LNS_set_isa (66)");
EXPECT_EQ(NextLine(), "0x0000006c: 0d Unrecognized standard opcode "
"(operands: 0x0000000000000001, 0x0123456789abcdef)");
EXPECT_EQ(NextLine(), "0x00000077: 0e Unrecognized standard opcode");
EXPECT_EQ(NextLine(), "0x00000078: ff address += 17, line += -3");
EXPECT_EQ(NextLine(),
" 0x0123456789abce53 20 44 33 66 "
" 0 basic_block prologue_end epilogue_begin");
EXPECT_EQ(NextLine(), "0x00000079: 00 DW_LNE_end_sequence");
EXPECT_EQ(NextLine(), " 0x0123456789abce53 20 44 33 "
"66 0 end_sequence");
EXPECT_EQ(NextLine(), "");
EXPECT_EQ(Output.size(), Pos);
}
using ValueAndLengths = std::vector<LineTable::ValueAndLength>;
struct TruncatedOpcodeFixtureBase : public CommonFixture {
LineTable &setupTable() {
LineTable &LT = Gen->addLineTable();
// Creating the prologue before adding any opcodes ensures that the unit
// length does not include the table body.
DWARFDebugLine::Prologue Prologue = LT.createBasicPrologue();
// Add an unrecognised standard opcode, and adjust prologue properties
// accordingly.
Prologue.TotalLength += BodyLength + 1;
++Prologue.PrologueLength;
++Prologue.OpcodeBase;
Prologue.StandardOpcodeLengths.push_back(2);
LT.setPrologue(Prologue);
return LT;
}
void runTest(uint8_t OpcodeValue) {
generate();
DWARFDebugLine::SectionParser Parser(LineData, *Context, CUs, TUs);
std::string Output;
raw_string_ostream OS(Output);
Parser.parseNext(RecordRecoverable, RecordUnrecoverable, &OS,
/*Verbose=*/true);
OS.flush();
std::string LinePrefix =
("0x0000002f: 0" + Twine::utohexstr(OpcodeValue) + " ").str();
StringRef OutputRef(Output);
StringRef OutputToCheck = OutputRef.split(LinePrefix).second;
// Each extended opcode ends with a new line and then the table ends with an
// additional blank line.
EXPECT_EQ((ExpectedOutput + "\n\n").str(), OutputToCheck);
}
uint64_t BodyLength;
uint8_t Opcode;
ValueAndLengths Operands;
StringRef ExpectedOutput;
StringRef ExpectedErr;
};
struct TruncatedStandardOpcodeFixture
: public TestWithParam<
std::tuple<uint64_t, uint8_t, ValueAndLengths, StringRef, StringRef>>,
public TruncatedOpcodeFixtureBase {
void SetUp() {
std::tie(BodyLength, Opcode, Operands, ExpectedOutput, ExpectedErr) =
GetParam();
}
};
struct TruncatedExtendedOpcodeFixture
: public TestWithParam<std::tuple<uint64_t, uint64_t, uint8_t,
ValueAndLengths, StringRef, StringRef>>,
public TruncatedOpcodeFixtureBase {
void SetUp() {
std::tie(BodyLength, OpcodeLength, Opcode, Operands, ExpectedOutput,
ExpectedErr) = GetParam();
// Swap the byte order of the operands on big endian hosts, so that the raw
// bytes are always in the same order. ValLen.Value is a uint64_t, so make
// sure to shift the value back to the actually used bits for the
// appropriate type.
if (sys::IsBigEndianHost)
for (LineTable::ValueAndLength &ValLen : Operands)
if (ValLen.Length != LineTable::SLEB &&
ValLen.Length != LineTable::ULEB &&
ValLen.Length != LineTable::Byte) {
sys::swapByteOrder(ValLen.Value);
if (ValLen.Length == LineTable::Long)
ValLen.Value >>= 32;
if (ValLen.Length == LineTable::Half)
ValLen.Value >>= 48;
}
}
uint64_t OpcodeLength;
};
TEST_P(TruncatedExtendedOpcodeFixture, ErrorForTruncatedExtendedOpcode) {
if (!setupGenerator())
return;
LineTable &LT = setupTable();
LT.addExtendedOpcode(OpcodeLength, Opcode, Operands);
runTest(0);
EXPECT_THAT_ERROR(std::move(Recoverable),
FailedWithMessage(ExpectedErr.str()));
}
INSTANTIATE_TEST_CASE_P(
TruncatedExtendedOpcodeParams, TruncatedExtendedOpcodeFixture,
Values(
// Truncated length:
std::make_tuple(1, 1, /*ArbitraryOpcode=*/0x7f, ValueAndLengths(), "",
"unable to decode LEB128 at offset 0x00000030: "
"malformed uleb128, extends past end"),
// Truncated opcode:
std::make_tuple(
2, 9, /*ArbitraryOpcode=*/0x7f, ValueAndLengths(), "",
"unexpected end of data at offset 0x31 while reading [0x31, 0x32)"),
// Truncated operands:
std::make_tuple(
3, 9, DW_LNE_set_address,
ValueAndLengths{{0x1234567890abcdef, LineTable::Quad}},
"DW_LNE_set_address",
"unexpected end of data at offset 0x32 while reading [0x32, 0x3a)"),
std::make_tuple(
10, 9, DW_LNE_set_address,
ValueAndLengths{{0x1234567890abcdef, LineTable::Quad}},
"DW_LNE_set_address (<parsing error> ef cd ab 90 78 56 34)",
"unexpected end of data at offset 0x39 while reading [0x32, 0x3a)"),
std::make_tuple(3, 6, DW_LNE_define_file,
ValueAndLengths{{'a', LineTable::Byte},
{'\0', LineTable::Byte},
{1, LineTable::ULEB},
{1, LineTable::ULEB},
{1, LineTable::ULEB}},
"DW_LNE_define_file",
"no null terminated string at offset 0x32"),
std::make_tuple(5, 6, DW_LNE_define_file,
ValueAndLengths{{'a', LineTable::Byte},
{'\0', LineTable::Byte},
{1, LineTable::ULEB},
{1, LineTable::ULEB},
{1, LineTable::ULEB}},
"DW_LNE_define_file (<parsing error> 61 00)",
"unable to decode LEB128 at offset 0x00000034: "
"malformed uleb128, extends past end"),
std::make_tuple(6, 6, DW_LNE_define_file,
ValueAndLengths{{'a', LineTable::Byte},
{'\0', LineTable::Byte},
{1, LineTable::ULEB},
{1, LineTable::ULEB},
{1, LineTable::ULEB}},
"DW_LNE_define_file (<parsing error> 61 00 01)",
"unable to decode LEB128 at offset 0x00000035: "
"malformed uleb128, extends past end"),
std::make_tuple(7, 6, DW_LNE_define_file,
ValueAndLengths{{'a', LineTable::Byte},
{'\0', LineTable::Byte},
{1, LineTable::ULEB},
{1, LineTable::ULEB},
{1, LineTable::ULEB}},
"DW_LNE_define_file (<parsing error> 61 00 01 01)",
"unable to decode LEB128 at offset 0x00000036: "
"malformed uleb128, extends past end"),
std::make_tuple(3, 2, DW_LNE_set_discriminator,
ValueAndLengths{{1, LineTable::ULEB}},
"DW_LNE_set_discriminator",
"unable to decode LEB128 at offset 0x00000032: "
"malformed uleb128, extends past end"),
std::make_tuple(
6, 5, /*Unknown=*/0x7f,
ValueAndLengths{{0x12345678, LineTable::Long}},
"Unrecognized extended op 0x7f length 5 (<parsing error> 78 56 34)",
"unexpected end of data at offset 0x35 while reading [0x32, "
"0x36)")), );
TEST_P(TruncatedStandardOpcodeFixture, ErrorForTruncatedStandardOpcode) {
if (!setupGenerator())
return;
LineTable &LT = setupTable();
LT.addStandardOpcode(Opcode, Operands);
runTest(Opcode);
EXPECT_THAT_ERROR(std::move(Unrecoverable),
FailedWithMessage(ExpectedErr.str()));
}
INSTANTIATE_TEST_CASE_P(
TruncatedStandardOpcodeParams, TruncatedStandardOpcodeFixture,
Values(
std::make_tuple(2, DW_LNS_advance_pc,
ValueAndLengths{{0x100, LineTable::ULEB}},
"DW_LNS_advance_pc",
"unable to decode LEB128 at offset 0x00000030: "
"malformed uleb128, extends past end"),
std::make_tuple(2, DW_LNS_advance_line,
ValueAndLengths{{0x200, LineTable::SLEB}},
"DW_LNS_advance_line",
"unable to decode LEB128 at offset 0x00000030: "
"malformed sleb128, extends past end"),
std::make_tuple(2, DW_LNS_set_file,
ValueAndLengths{{0x300, LineTable::ULEB}},
"DW_LNS_set_file",
"unable to decode LEB128 at offset 0x00000030: "
"malformed uleb128, extends past end"),
std::make_tuple(2, DW_LNS_set_column,
ValueAndLengths{{0x400, LineTable::ULEB}},
"DW_LNS_set_column",
"unable to decode LEB128 at offset 0x00000030: "
"malformed uleb128, extends past end"),
std::make_tuple(
2, DW_LNS_fixed_advance_pc,
ValueAndLengths{{0x500, LineTable::Half}},
"DW_LNS_fixed_advance_pc",
"unexpected end of data at offset 0x31 while reading [0x30, 0x32)"),
std::make_tuple(2, DW_LNS_set_isa,
ValueAndLengths{{0x600, LineTable::ULEB}},
"DW_LNS_set_isa",
"unable to decode LEB128 at offset 0x00000030: "
"malformed uleb128, extends past end"),
std::make_tuple(2, 0xd,
ValueAndLengths{{0x700, LineTable::ULEB},
{0x800, LineTable::ULEB}},
"Unrecognized standard opcode",
"unable to decode LEB128 at offset 0x00000030: "
"malformed uleb128, extends past end"),
std::make_tuple(
4, 0xd,
ValueAndLengths{{0x900, LineTable::ULEB}, {0xa00, LineTable::ULEB}},
"Unrecognized standard opcode (operands: 0x0000000000000900)",
"unable to decode LEB128 at offset 0x00000032: "
"malformed uleb128, extends past end")), );
TEST_F(DebugLineBasicFixture, PrintPathsProperly) {
if (!setupGenerator(5))
return;
LineTable &LT = Gen->addLineTable();
DWARFDebugLine::Prologue P = LT.createBasicPrologue();
P.IncludeDirectories.push_back(
DWARFFormValue::createFromPValue(DW_FORM_string, "b dir"));
P.FileNames.push_back(DWARFDebugLine::FileNameEntry());
P.FileNames.back().Name =
DWARFFormValue::createFromPValue(DW_FORM_string, "b file");
P.FileNames.back().DirIdx = 1;
P.TotalLength += 14;
P.PrologueLength += 14;
LT.setPrologue(P);
generate();
auto ExpectedLineTable = Line.getOrParseLineTable(LineData, 0, *Context,
nullptr, RecordRecoverable);
EXPECT_THAT_EXPECTED(ExpectedLineTable, Succeeded());
std::string Result;
// DWARF 5 stores the compilation directory in two places: the Compilation
// Unit and the directory table entry 0, and implementations are free to use
// one or the other. This copy serves as the one stored in the CU.
StringRef CompDir = "a dir";
EXPECT_FALSE(
(*ExpectedLineTable)
->Prologue.getFileNameByIndex(
1, CompDir, DILineInfoSpecifier::FileLineInfoKind::None, Result));
EXPECT_TRUE((*ExpectedLineTable)
->Prologue.getFileNameByIndex(
1, CompDir,
DILineInfoSpecifier::FileLineInfoKind::RawValue, Result));
EXPECT_TRUE((*ExpectedLineTable)
->Prologue.getFileNameByIndex(
1, CompDir,
DILineInfoSpecifier::FileLineInfoKind::BaseNameOnly,
Result));
EXPECT_STREQ(Result.c_str(), "b file");
EXPECT_TRUE((*ExpectedLineTable)
->Prologue.getFileNameByIndex(
1, CompDir,
DILineInfoSpecifier::FileLineInfoKind::RelativeFilePath,
Result));
EXPECT_THAT(Result.c_str(), MatchesRegex("b dir.b file"));
EXPECT_TRUE((*ExpectedLineTable)
->Prologue.getFileNameByIndex(
1, CompDir,
DILineInfoSpecifier::FileLineInfoKind::AbsoluteFilePath,
Result));
EXPECT_THAT(Result.c_str(), MatchesRegex("a dir.b dir.b file"));
}
} // end anonymous namespace
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