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|
//===- llvm/unittest/DebugInfo/DWARFFormValueTest.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 "llvm/DebugInfo/DWARF/DWARFFormValue.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/BinaryFormat/Dwarf.h"
#include "llvm/Support/FormatVariadic.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/LEB128.h"
#include "gtest/gtest.h"
#include <climits>
using namespace llvm;
using namespace dwarf;
namespace {
bool isFormClass(dwarf::Form Form, DWARFFormValue::FormClass FC) {
return DWARFFormValue(Form).isFormClass(FC);
}
TEST(DWARFFormValue, FormClass) {
EXPECT_TRUE(isFormClass(DW_FORM_addr, DWARFFormValue::FC_Address));
EXPECT_FALSE(isFormClass(DW_FORM_data8, DWARFFormValue::FC_Address));
EXPECT_TRUE(isFormClass(DW_FORM_data8, DWARFFormValue::FC_Constant));
EXPECT_TRUE(isFormClass(DW_FORM_data8, DWARFFormValue::FC_SectionOffset));
EXPECT_TRUE(
isFormClass(DW_FORM_sec_offset, DWARFFormValue::FC_SectionOffset));
EXPECT_TRUE(isFormClass(DW_FORM_GNU_str_index, DWARFFormValue::FC_String));
EXPECT_TRUE(isFormClass(DW_FORM_GNU_addr_index, DWARFFormValue::FC_Address));
EXPECT_FALSE(isFormClass(DW_FORM_ref_addr, DWARFFormValue::FC_Address));
EXPECT_TRUE(isFormClass(DW_FORM_ref_addr, DWARFFormValue::FC_Reference));
EXPECT_TRUE(isFormClass(DW_FORM_ref_sig8, DWARFFormValue::FC_Reference));
}
template<typename RawTypeT>
DWARFFormValue createDataXFormValue(dwarf::Form Form, RawTypeT Value) {
char Raw[sizeof(RawTypeT)];
memcpy(Raw, &Value, sizeof(RawTypeT));
uint64_t Offset = 0;
DWARFFormValue Result(Form);
DWARFDataExtractor Data(StringRef(Raw, sizeof(RawTypeT)),
sys::IsLittleEndianHost, sizeof(void *));
Result.extractValue(Data, &Offset, {0, 0, dwarf::DwarfFormat::DWARF32});
return Result;
}
DWARFFormValue createULEBFormValue(uint64_t Value) {
SmallString<10> RawData;
raw_svector_ostream OS(RawData);
encodeULEB128(Value, OS);
uint64_t Offset = 0;
DWARFFormValue Result(DW_FORM_udata);
DWARFDataExtractor Data(OS.str(), sys::IsLittleEndianHost, sizeof(void *));
Result.extractValue(Data, &Offset, {0, 0, dwarf::DwarfFormat::DWARF32});
return Result;
}
DWARFFormValue createSLEBFormValue(int64_t Value) {
SmallString<10> RawData;
raw_svector_ostream OS(RawData);
encodeSLEB128(Value, OS);
uint64_t Offset = 0;
DWARFFormValue Result(DW_FORM_sdata);
DWARFDataExtractor Data(OS.str(), sys::IsLittleEndianHost, sizeof(void *));
Result.extractValue(Data, &Offset, {0, 0, dwarf::DwarfFormat::DWARF32});
return Result;
}
TEST(DWARFFormValue, SignedConstantForms) {
// Check that we correctly sign extend fixed size forms.
auto Sign1 = createDataXFormValue<uint8_t>(DW_FORM_data1, -123);
auto Sign2 = createDataXFormValue<uint16_t>(DW_FORM_data2, -12345);
auto Sign4 = createDataXFormValue<uint32_t>(DW_FORM_data4, -123456789);
auto Sign8 = createDataXFormValue<uint64_t>(DW_FORM_data8, -1);
EXPECT_EQ(Sign1.getAsSignedConstant().getValue(), -123);
EXPECT_EQ(Sign2.getAsSignedConstant().getValue(), -12345);
EXPECT_EQ(Sign4.getAsSignedConstant().getValue(), -123456789);
EXPECT_EQ(Sign8.getAsSignedConstant().getValue(), -1);
// Check that we can handle big positive values, but that we return
// an error just over the limit.
auto UMax = createULEBFormValue(LLONG_MAX);
auto TooBig = createULEBFormValue(uint64_t(LLONG_MAX) + 1);
EXPECT_EQ(UMax.getAsSignedConstant().getValue(), LLONG_MAX);
EXPECT_EQ(TooBig.getAsSignedConstant().hasValue(), false);
// Sanity check some other forms.
auto Data1 = createDataXFormValue<uint8_t>(DW_FORM_data1, 120);
auto Data2 = createDataXFormValue<uint16_t>(DW_FORM_data2, 32000);
auto Data4 = createDataXFormValue<uint32_t>(DW_FORM_data4, 2000000000);
auto Data8 = createDataXFormValue<uint64_t>(DW_FORM_data8, 0x1234567812345678LL);
auto LEBMin = createSLEBFormValue(LLONG_MIN);
auto LEBMax = createSLEBFormValue(LLONG_MAX);
auto LEB1 = createSLEBFormValue(-42);
auto LEB2 = createSLEBFormValue(42);
EXPECT_EQ(Data1.getAsSignedConstant().getValue(), 120);
EXPECT_EQ(Data2.getAsSignedConstant().getValue(), 32000);
EXPECT_EQ(Data4.getAsSignedConstant().getValue(), 2000000000);
EXPECT_EQ(Data8.getAsSignedConstant().getValue(), 0x1234567812345678LL);
EXPECT_EQ(LEBMin.getAsSignedConstant().getValue(), LLONG_MIN);
EXPECT_EQ(LEBMax.getAsSignedConstant().getValue(), LLONG_MAX);
EXPECT_EQ(LEB1.getAsSignedConstant().getValue(), -42);
EXPECT_EQ(LEB2.getAsSignedConstant().getValue(), 42);
// Data16 is a little tricky.
char Cksum[16] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
DWARFFormValue Data16(DW_FORM_data16);
DWARFDataExtractor DE16(StringRef(Cksum, 16), sys::IsLittleEndianHost,
sizeof(void *));
uint64_t Offset = 0;
Data16.extractValue(DE16, &Offset, {0, 0, dwarf::DwarfFormat::DWARF32});
SmallString<32> Str;
raw_svector_ostream Res(Str);
Data16.dump(Res, DIDumpOptions());
EXPECT_EQ(memcmp(Str.data(), "000102030405060708090a0b0c0d0e0f", 32), 0);
}
using ParamType = std::tuple<Form, uint16_t, uint8_t, DwarfFormat,
ArrayRef<uint8_t>, uint64_t, bool>;
struct FormSkipValueFixtureBase : public testing::TestWithParam<ParamType> {
void SetUp() override {
std::tie(Fm, Version, AddrSize, Dwarf, InitialData, ExpectedSkipped,
ExpectedResult) = GetParam();
}
void doSkipValueTest() {
SCOPED_TRACE("Inputs: Form = " + std::to_string(Fm) +
", Version = " + std::to_string(Version) +
", AddrSize = " + std::to_string(uint32_t(AddrSize)) +
", DwarfFormat = " + std::to_string(Dwarf));
std::vector<uint8_t> Buf(InitialData.data(),
InitialData.data() + InitialData.size());
// The data extractor only adjusts the offset to the end of the buffer when
// attempting to read past the end, so the buffer must be bigger than the
// expected amount to be skipped to identify cases where more data than
// expected is skipped.
Buf.resize(ExpectedSkipped + 1);
DWARFDataExtractor Data(Buf, sys::IsLittleEndianHost, AddrSize);
uint64_t Offset = 0;
EXPECT_EQ(DWARFFormValue::skipValue(Fm, Data, &Offset,
{Version, AddrSize, Dwarf}),
ExpectedResult);
EXPECT_EQ(Offset, ExpectedSkipped);
}
Form Fm;
uint16_t Version;
uint8_t AddrSize;
DwarfFormat Dwarf;
ArrayRef<uint8_t> InitialData;
uint64_t ExpectedSkipped;
bool ExpectedResult;
};
template <typename T> static ArrayRef<uint8_t> toBytes(const T &Input) {
return ArrayRef<uint8_t>(reinterpret_cast<const uint8_t *>(&Input),
sizeof(Input));
}
const uint8_t LEBData[] = {0x80, 0x1};
ArrayRef<uint8_t> SampleLEB(LEBData, sizeof(LEBData));
const uint8_t SampleLength8 = 0x80;
const uint16_t SampleLength16 = 0x80;
const uint32_t SampleLength = 0x80;
ArrayRef<uint8_t> SampleU8 = toBytes(SampleLength8);
ArrayRef<uint8_t> SampleU16 = toBytes(SampleLength16);
ArrayRef<uint8_t> SampleU32 = toBytes(SampleLength);
const uint8_t StringData[] = "abcdef";
ArrayRef<uint8_t> SampleString(StringData, sizeof(StringData));
const uint8_t IndirectData8[] = {DW_FORM_data8};
const uint8_t IndirectData16[] = {DW_FORM_data16};
const uint8_t IndirectAddr[] = {DW_FORM_addr};
const uint8_t IndirectIndirectData1[] = {DW_FORM_indirect, DW_FORM_data1};
const uint8_t IndirectIndirectEnd[] = {DW_FORM_indirect};
// Gtest's paramterised tests only allow a maximum of 50 cases, so split the
// test into multiple identical parts to share the cases.
struct FormSkipValueFixture1 : FormSkipValueFixtureBase {};
struct FormSkipValueFixture2 : FormSkipValueFixtureBase {};
TEST_P(FormSkipValueFixture1, skipValuePart1) { doSkipValueTest(); }
TEST_P(FormSkipValueFixture2, skipValuePart2) { doSkipValueTest(); }
INSTANTIATE_TEST_SUITE_P(
SkipValueTestParams1, FormSkipValueFixture1,
testing::Values(
// Form, Version, AddrSize, DwarfFormat, InitialData, ExpectedSize,
// ExpectedResult.
ParamType(DW_FORM_exprloc, 0, 0, DWARF32, SampleLEB,
SampleLength + SampleLEB.size(), true),
ParamType(DW_FORM_block, 0, 0, DWARF32, SampleLEB,
SampleLength + SampleLEB.size(), true),
ParamType(DW_FORM_block1, 0, 0, DWARF32, SampleU8, SampleLength8 + 1,
true),
ParamType(DW_FORM_block2, 0, 0, DWARF32, SampleU16, SampleLength16 + 2,
true),
ParamType(DW_FORM_block4, 0, 0, DWARF32, SampleU32, SampleLength + 4,
true),
ParamType(DW_FORM_string, 0, 0, DWARF32, SampleString,
SampleString.size(), true),
ParamType(DW_FORM_addr, 0, 42, DWARF32, SampleU32, 0, false),
ParamType(DW_FORM_addr, 4, 0, DWARF32, SampleU32, 0, false),
ParamType(DW_FORM_addr, 4, 42, DWARF32, SampleU32, 42, true),
ParamType(DW_FORM_ref_addr, 0, 1, DWARF32, SampleU32, 0, false),
ParamType(DW_FORM_ref_addr, 1, 0, DWARF32, SampleU32, 0, false),
ParamType(DW_FORM_ref_addr, 1, 1, DWARF32, SampleU32, 4, true),
ParamType(DW_FORM_ref_addr, 1, 1, DWARF64, SampleU32, 8, true),
ParamType(DW_FORM_ref_addr, 2, 42, DWARF32, SampleU32, 42, true),
ParamType(DW_FORM_ref_addr, 2, 42, DWARF64, SampleU32, 42, true),
ParamType(DW_FORM_ref_addr, 3, 3, DWARF32, SampleU32, 4, true),
ParamType(DW_FORM_ref_addr, 3, 3, DWARF64, SampleU32, 8, true),
ParamType(DW_FORM_flag_present, 4, 4, DWARF32, SampleU32, 0, true),
ParamType(DW_FORM_data1, 0, 0, DWARF32, SampleU32, 1, true),
ParamType(DW_FORM_data2, 0, 0, DWARF32, SampleU32, 2, true),
ParamType(DW_FORM_data4, 0, 0, DWARF32, SampleU32, 4, true),
ParamType(DW_FORM_data8, 0, 0, DWARF32, SampleU32, 8, true),
ParamType(DW_FORM_data16, 0, 0, DWARF32, SampleU32, 16, true),
ParamType(DW_FORM_flag, 0, 0, DWARF32, SampleU32, 1, true),
ParamType(DW_FORM_ref1, 0, 0, DWARF32, SampleU32, 1, true),
ParamType(DW_FORM_ref2, 0, 0, DWARF32, SampleU32, 2, true),
ParamType(DW_FORM_ref4, 0, 0, DWARF32, SampleU32, 4, true),
ParamType(DW_FORM_ref8, 0, 0, DWARF32, SampleU32, 8, true),
ParamType(DW_FORM_ref_sig8, 0, 0, DWARF32, SampleU32, 8, true),
ParamType(DW_FORM_ref_sup4, 0, 0, DWARF32, SampleU32, 4, true),
ParamType(DW_FORM_ref_sup8, 0, 0, DWARF32, SampleU32, 8, true),
ParamType(DW_FORM_strx1, 0, 0, DWARF32, SampleU32, 1, true),
ParamType(DW_FORM_strx2, 0, 0, DWARF32, SampleU32, 2, true),
ParamType(DW_FORM_strx4, 0, 0, DWARF32, SampleU32, 4, true),
ParamType(DW_FORM_addrx1, 0, 0, DWARF32, SampleU32, 1, true),
ParamType(DW_FORM_addrx2, 0, 0, DWARF32, SampleU32, 2, true),
ParamType(DW_FORM_addrx4, 0, 0, DWARF32, SampleU32, 4, true),
ParamType(DW_FORM_sec_offset, 0, 1, DWARF32, SampleU32, 0, false),
ParamType(DW_FORM_sec_offset, 1, 0, DWARF32, SampleU32, 0, false),
ParamType(DW_FORM_sec_offset, 1, 1, DWARF32, SampleU32, 4, true),
ParamType(DW_FORM_sec_offset, 1, 1, DWARF64, SampleU32, 8, true),
ParamType(DW_FORM_strp, 0, 1, DWARF32, SampleU32, 0, false),
ParamType(DW_FORM_strp, 1, 0, DWARF32, SampleU32, 0, false),
ParamType(DW_FORM_strp, 1, 1, DWARF32, SampleU32, 4, true),
ParamType(DW_FORM_strp, 1, 1, DWARF64, SampleU32, 8, true),
ParamType(DW_FORM_strp_sup, 0, 1, DWARF32, SampleU32, 0, false),
ParamType(DW_FORM_strp_sup, 1, 0, DWARF32, SampleU32, 0, false),
ParamType(DW_FORM_strp_sup, 1, 1, DWARF32, SampleU32, 4, true),
ParamType(DW_FORM_strp_sup, 1, 1, DWARF64, SampleU32, 8, true)));
INSTANTIATE_TEST_SUITE_P(
SkipValueTestParams2, FormSkipValueFixture2,
testing::Values(
ParamType(DW_FORM_line_strp, 0, 1, DWARF32, SampleU32, 0, false),
ParamType(DW_FORM_line_strp, 1, 0, DWARF32, SampleU32, 0, false),
ParamType(DW_FORM_line_strp, 1, 1, DWARF32, SampleU32, 4, true),
ParamType(DW_FORM_line_strp, 1, 1, DWARF64, SampleU32, 8, true),
ParamType(DW_FORM_GNU_ref_alt, 0, 1, DWARF32, SampleU32, 0, false),
ParamType(DW_FORM_GNU_ref_alt, 1, 0, DWARF32, SampleU32, 0, false),
ParamType(DW_FORM_GNU_ref_alt, 1, 1, DWARF32, SampleU32, 4, true),
ParamType(DW_FORM_GNU_ref_alt, 1, 1, DWARF64, SampleU32, 8, true),
ParamType(DW_FORM_GNU_strp_alt, 0, 1, DWARF32, SampleU32, 0, false),
ParamType(DW_FORM_GNU_strp_alt, 1, 0, DWARF32, SampleU32, 0, false),
ParamType(DW_FORM_GNU_strp_alt, 1, 1, DWARF32, SampleU32, 4, true),
ParamType(DW_FORM_GNU_strp_alt, 1, 1, DWARF64, SampleU32, 8, true),
ParamType(DW_FORM_sdata, 0, 0, DWARF32, SampleLEB, SampleLEB.size(),
true),
ParamType(DW_FORM_udata, 0, 0, DWARF32, SampleLEB, SampleLEB.size(),
true),
ParamType(DW_FORM_ref_udata, 0, 0, DWARF32, SampleLEB, SampleLEB.size(),
true),
ParamType(DW_FORM_strx, 0, 0, DWARF32, SampleLEB, SampleLEB.size(),
true),
ParamType(DW_FORM_addrx, 0, 0, DWARF32, SampleLEB, SampleLEB.size(),
true),
ParamType(DW_FORM_loclistx, 0, 0, DWARF32, SampleLEB, SampleLEB.size(),
true),
ParamType(DW_FORM_rnglistx, 0, 0, DWARF32, SampleLEB, SampleLEB.size(),
true),
ParamType(DW_FORM_GNU_addr_index, 0, 0, DWARF32, SampleLEB,
SampleLEB.size(), true),
ParamType(DW_FORM_GNU_str_index, 0, 0, DWARF32, SampleLEB,
SampleLEB.size(), true),
ParamType(DW_FORM_indirect, 0, 0, DWARF32,
ArrayRef<uint8_t>(IndirectData8, sizeof(IndirectData8)), 9,
true),
ParamType(DW_FORM_indirect, 0, 0, DWARF32,
ArrayRef<uint8_t>(IndirectData16, sizeof(IndirectData16)), 17,
true),
ParamType(DW_FORM_indirect, 4, 0, DWARF32,
ArrayRef<uint8_t>(IndirectAddr, sizeof(IndirectAddr)), 1,
false),
ParamType(DW_FORM_indirect, 4, 4, DWARF32,
ArrayRef<uint8_t>(IndirectAddr, sizeof(IndirectAddr)), 5,
true),
ParamType(DW_FORM_indirect, 4, 4, DWARF32,
ArrayRef<uint8_t>(IndirectIndirectData1,
sizeof(IndirectIndirectData1)),
3, true),
ParamType(DW_FORM_indirect, 4, 4, DWARF32,
ArrayRef<uint8_t>(IndirectIndirectEnd,
sizeof(IndirectIndirectEnd)),
2, false),
ParamType(/*Unknown=*/Form(0xff), 4, 4, DWARF32, SampleU32, 0, false)));
using ErrorParams = std::tuple<Form, std::vector<uint8_t>>;
struct ExtractValueErrorFixture : public testing::TestWithParam<ErrorParams> {
void SetUp() override { std::tie(Fm, InitialData) = GetParam(); }
Form Fm;
ArrayRef<uint8_t> InitialData;
};
TEST_P(ExtractValueErrorFixture, Test) {
SCOPED_TRACE(formatv("Fm = {0}, InitialData = {1}", Fm,
make_range(InitialData.begin(), InitialData.end()))
.str());
DWARFDataExtractor Data(InitialData, sys::IsLittleEndianHost, 4);
DWARFFormValue Form(Fm);
uint64_t Offset = 0;
EXPECT_FALSE(Form.extractValue(Data, &Offset, {0, 0, DWARF32}));
}
INSTANTIATE_TEST_SUITE_P(
ExtractValueErrorParams, ExtractValueErrorFixture,
testing::Values(
ErrorParams{DW_FORM_ref_addr, {}}, ErrorParams{DW_FORM_block, {}},
ErrorParams{DW_FORM_block, {1}}, ErrorParams{DW_FORM_block, {2, 0}},
ErrorParams{DW_FORM_block1, {}}, ErrorParams{DW_FORM_block2, {}},
ErrorParams{DW_FORM_block4, {}}, ErrorParams{DW_FORM_data1, {}},
ErrorParams{DW_FORM_data2, {}}, ErrorParams{DW_FORM_strx3, {}},
ErrorParams{DW_FORM_data4, {}}, ErrorParams{DW_FORM_data8, {}},
ErrorParams{DW_FORM_data16, {}}, ErrorParams{DW_FORM_sdata, {}},
ErrorParams{DW_FORM_udata, {}}, ErrorParams{DW_FORM_string, {}},
ErrorParams{DW_FORM_indirect, {}},
ErrorParams{DW_FORM_indirect, {DW_FORM_data1}},
ErrorParams{DW_FORM_strp_sup, {}}, ErrorParams{DW_FORM_ref_sig8, {}}));
using DumpValueParams =
std::tuple<Form, ArrayRef<uint8_t>, DwarfFormat, StringRef>;
struct DumpValueFixture : public testing::TestWithParam<DumpValueParams> {
void SetUp() override {
std::tie(Fm, InitialData, Format, ExpectedResult) = GetParam();
}
Form Fm;
ArrayRef<uint8_t> InitialData;
DwarfFormat Format;
StringRef ExpectedResult;
};
TEST_P(DumpValueFixture, Test) {
SCOPED_TRACE(formatv("Fm = {0}, InitialData = [{1}], Format = {2}", Fm,
toHex(InitialData),
Format == DWARF64 ? "DWARF64" : "DWARF32"));
DWARFDataExtractor Data(InitialData, sys::IsLittleEndianHost, 8);
DWARFFormValue Form(Fm);
uint64_t Offset = 0;
Form.extractValue(Data, &Offset, {0, 0, Format});
std::string Output;
raw_string_ostream OS(Output);
DIDumpOptions Opts;
Opts.Verbose = true;
Opts.ShowAddresses = true;
Form.dump(OS, Opts);
OS.flush();
EXPECT_EQ(Output, ExpectedResult);
}
const uint32_t DumpTestSample32Val = 0x112233;
ArrayRef<uint8_t> DumpTestSample32 = toBytes(DumpTestSample32Val);
const uint64_t DumpTestSample64Val = 0x11223344556677;
ArrayRef<uint8_t> DumpTestSample64 = toBytes(DumpTestSample64Val);
INSTANTIATE_TEST_SUITE_P(
DumpValueParams, DumpValueFixture,
testing::Values(DumpValueParams{DW_FORM_strp, DumpTestSample32, DWARF32,
" .debug_str[0x00112233] = "},
DumpValueParams{DW_FORM_strp, DumpTestSample64, DWARF64,
" .debug_str[0x0011223344556677] = "},
DumpValueParams{DW_FORM_line_strp, DumpTestSample32,
DWARF32, " .debug_line_str[0x00112233] = "},
DumpValueParams{DW_FORM_line_strp, DumpTestSample64,
DWARF64,
" .debug_line_str[0x0011223344556677] = "},
DumpValueParams{DW_FORM_sec_offset, DumpTestSample32,
DWARF32, "0x00112233"},
DumpValueParams{DW_FORM_sec_offset, DumpTestSample64,
DWARF64, "0x0011223344556677"}));
} // end anonymous namespace
|
