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llvm-for-llvmta/unittests/DebugInfo/DWARF/DWARFDebugInfoTest.cpp

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2022-04-25 10:02:23 +02:00
//===- llvm/unittest/DebugInfo/DWARFDebugInfoTest.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/ADT/ArrayRef.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Triple.h"
#include "llvm/BinaryFormat/Dwarf.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/DebugInfo/DWARF/DWARFCompileUnit.h"
#include "llvm/DebugInfo/DWARF/DWARFContext.h"
#include "llvm/DebugInfo/DWARF/DWARFDie.h"
#include "llvm/DebugInfo/DWARF/DWARFFormValue.h"
#include "llvm/DebugInfo/DWARF/DWARFVerifier.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCSectionELF.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/ObjectYAML/DWARFEmitter.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Testing/Support/Error.h"
#include "gtest/gtest.h"
#include <string>
using namespace llvm;
using namespace dwarf;
using namespace utils;
namespace {
template <uint16_t Version, class AddrType, class RefAddrType>
void TestAllForms() {
Triple Triple = getDefaultTargetTripleForAddrSize(sizeof(AddrType));
if (!isConfigurationSupported(Triple))
return;
// Test that we can decode all DW_FORM values correctly.
const AddrType AddrValue = (AddrType)0x0123456789abcdefULL;
const uint8_t BlockData[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 0};
const uint32_t BlockSize = sizeof(BlockData);
const RefAddrType RefAddr = 0x12345678;
const uint8_t Data1 = 0x01U;
const uint16_t Data2 = 0x2345U;
const uint32_t Data4 = 0x6789abcdU;
const uint64_t Data8 = 0x0011223344556677ULL;
const uint64_t Data8_2 = 0xAABBCCDDEEFF0011ULL;
const uint8_t Data16[16] = {1, 2, 3, 4, 5, 6, 7, 8,
9, 10, 11, 12, 13, 14, 15, 16};
const int64_t SData = INT64_MIN;
const int64_t ICSData = INT64_MAX; // DW_FORM_implicit_const SData
const uint64_t UData[] = {UINT64_MAX - 1, UINT64_MAX - 2, UINT64_MAX - 3,
UINT64_MAX - 4, UINT64_MAX - 5, UINT64_MAX - 6,
UINT64_MAX - 7, UINT64_MAX - 8, UINT64_MAX - 9};
#define UDATA_1 18446744073709551614ULL
const uint32_t Dwarf32Values[] = {1, 2, 3, 4, 5, 6, 7, 8};
const char *StringValue = "Hello";
const char *StrpValue = "World";
const char *StrxValue = "Indexed";
const char *Strx1Value = "Indexed1";
const char *Strx2Value = "Indexed2";
const char *Strx3Value = "Indexed3";
const char *Strx4Value = "Indexed4";
auto ExpectedDG = dwarfgen::Generator::create(Triple, Version);
ASSERT_THAT_EXPECTED(ExpectedDG, Succeeded());
dwarfgen::Generator *DG = ExpectedDG.get().get();
dwarfgen::CompileUnit &CU = DG->addCompileUnit();
dwarfgen::DIE CUDie = CU.getUnitDIE();
if (Version >= 5)
CUDie.addStrOffsetsBaseAttribute();
uint16_t Attr = DW_AT_lo_user;
//----------------------------------------------------------------------
// Test address forms
//----------------------------------------------------------------------
const auto Attr_DW_FORM_addr = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr_DW_FORM_addr, DW_FORM_addr, AddrValue);
//----------------------------------------------------------------------
// Test block forms
//----------------------------------------------------------------------
const auto Attr_DW_FORM_block = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr_DW_FORM_block, DW_FORM_block, BlockData, BlockSize);
const auto Attr_DW_FORM_block1 = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr_DW_FORM_block1, DW_FORM_block1, BlockData, BlockSize);
const auto Attr_DW_FORM_block2 = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr_DW_FORM_block2, DW_FORM_block2, BlockData, BlockSize);
const auto Attr_DW_FORM_block4 = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr_DW_FORM_block4, DW_FORM_block4, BlockData, BlockSize);
// We handle data16 as a block form.
const auto Attr_DW_FORM_data16 = static_cast<dwarf::Attribute>(Attr++);
if (Version >= 5)
CUDie.addAttribute(Attr_DW_FORM_data16, DW_FORM_data16, Data16, 16);
//----------------------------------------------------------------------
// Test data forms
//----------------------------------------------------------------------
const auto Attr_DW_FORM_data1 = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr_DW_FORM_data1, DW_FORM_data1, Data1);
const auto Attr_DW_FORM_data2 = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr_DW_FORM_data2, DW_FORM_data2, Data2);
const auto Attr_DW_FORM_data4 = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr_DW_FORM_data4, DW_FORM_data4, Data4);
const auto Attr_DW_FORM_data8 = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr_DW_FORM_data8, DW_FORM_data8, Data8);
//----------------------------------------------------------------------
// Test string forms
//----------------------------------------------------------------------
const auto Attr_DW_FORM_string = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr_DW_FORM_string, DW_FORM_string, StringValue);
const auto Attr_DW_FORM_strx = static_cast<dwarf::Attribute>(Attr++);
const auto Attr_DW_FORM_strx1 = static_cast<dwarf::Attribute>(Attr++);
const auto Attr_DW_FORM_strx2 = static_cast<dwarf::Attribute>(Attr++);
const auto Attr_DW_FORM_strx3 = static_cast<dwarf::Attribute>(Attr++);
const auto Attr_DW_FORM_strx4 = static_cast<dwarf::Attribute>(Attr++);
if (Version >= 5) {
CUDie.addAttribute(Attr_DW_FORM_strx, DW_FORM_strx, StrxValue);
CUDie.addAttribute(Attr_DW_FORM_strx1, DW_FORM_strx1, Strx1Value);
CUDie.addAttribute(Attr_DW_FORM_strx2, DW_FORM_strx2, Strx2Value);
CUDie.addAttribute(Attr_DW_FORM_strx3, DW_FORM_strx3, Strx3Value);
CUDie.addAttribute(Attr_DW_FORM_strx4, DW_FORM_strx4, Strx4Value);
}
const auto Attr_DW_FORM_strp = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr_DW_FORM_strp, DW_FORM_strp, StrpValue);
//----------------------------------------------------------------------
// Test reference forms
//----------------------------------------------------------------------
const auto Attr_DW_FORM_ref_addr = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr_DW_FORM_ref_addr, DW_FORM_ref_addr, RefAddr);
const auto Attr_DW_FORM_ref1 = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr_DW_FORM_ref1, DW_FORM_ref1, Data1);
const auto Attr_DW_FORM_ref2 = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr_DW_FORM_ref2, DW_FORM_ref2, Data2);
const auto Attr_DW_FORM_ref4 = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr_DW_FORM_ref4, DW_FORM_ref4, Data4);
const auto Attr_DW_FORM_ref8 = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr_DW_FORM_ref8, DW_FORM_ref8, Data8);
const auto Attr_DW_FORM_ref_sig8 = static_cast<dwarf::Attribute>(Attr++);
if (Version >= 4)
CUDie.addAttribute(Attr_DW_FORM_ref_sig8, DW_FORM_ref_sig8, Data8_2);
const auto Attr_DW_FORM_ref_udata = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr_DW_FORM_ref_udata, DW_FORM_ref_udata, UData[0]);
//----------------------------------------------------------------------
// Test flag forms
//----------------------------------------------------------------------
const auto Attr_DW_FORM_flag_true = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr_DW_FORM_flag_true, DW_FORM_flag, true);
const auto Attr_DW_FORM_flag_false = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr_DW_FORM_flag_false, DW_FORM_flag, false);
const auto Attr_DW_FORM_flag_present = static_cast<dwarf::Attribute>(Attr++);
if (Version >= 4)
CUDie.addAttribute(Attr_DW_FORM_flag_present, DW_FORM_flag_present);
//----------------------------------------------------------------------
// Test SLEB128 based forms
//----------------------------------------------------------------------
const auto Attr_DW_FORM_sdata = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr_DW_FORM_sdata, DW_FORM_sdata, SData);
const auto Attr_DW_FORM_implicit_const =
static_cast<dwarf::Attribute>(Attr++);
if (Version >= 5)
CUDie.addAttribute(Attr_DW_FORM_implicit_const, DW_FORM_implicit_const,
ICSData);
//----------------------------------------------------------------------
// Test ULEB128 based forms
//----------------------------------------------------------------------
const auto Attr_DW_FORM_udata = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr_DW_FORM_udata, DW_FORM_udata, UData[0]);
//----------------------------------------------------------------------
// Test DWARF32/DWARF64 forms
//----------------------------------------------------------------------
const auto Attr_DW_FORM_GNU_ref_alt = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr_DW_FORM_GNU_ref_alt, DW_FORM_GNU_ref_alt,
Dwarf32Values[0]);
const auto Attr_DW_FORM_sec_offset = static_cast<dwarf::Attribute>(Attr++);
if (Version >= 4)
CUDie.addAttribute(Attr_DW_FORM_sec_offset, DW_FORM_sec_offset,
Dwarf32Values[1]);
//----------------------------------------------------------------------
// Add an address at the end to make sure we can decode this value
//----------------------------------------------------------------------
const auto Attr_Last = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr_Last, DW_FORM_addr, AddrValue);
//----------------------------------------------------------------------
// Generate the DWARF
//----------------------------------------------------------------------
StringRef FileBytes = DG->generate();
MemoryBufferRef FileBuffer(FileBytes, "dwarf");
auto Obj = object::ObjectFile::createObjectFile(FileBuffer);
EXPECT_TRUE((bool)Obj);
std::unique_ptr<DWARFContext> DwarfContext = DWARFContext::create(**Obj);
uint32_t NumCUs = DwarfContext->getNumCompileUnits();
EXPECT_EQ(NumCUs, 1u);
DWARFCompileUnit *U =
cast<DWARFCompileUnit>(DwarfContext->getUnitAtIndex(0));
auto DieDG = U->getUnitDIE(false);
EXPECT_TRUE(DieDG.isValid());
//----------------------------------------------------------------------
// Test address forms
//----------------------------------------------------------------------
EXPECT_EQ(AddrValue, toAddress(DieDG.find(Attr_DW_FORM_addr), 0));
//----------------------------------------------------------------------
// Test block forms
//----------------------------------------------------------------------
Optional<DWARFFormValue> FormValue;
ArrayRef<uint8_t> ExtractedBlockData;
Optional<ArrayRef<uint8_t>> BlockDataOpt;
FormValue = DieDG.find(Attr_DW_FORM_block);
EXPECT_TRUE((bool)FormValue);
BlockDataOpt = FormValue->getAsBlock();
EXPECT_TRUE(BlockDataOpt.hasValue());
ExtractedBlockData = BlockDataOpt.getValue();
EXPECT_EQ(ExtractedBlockData.size(), BlockSize);
EXPECT_TRUE(memcmp(ExtractedBlockData.data(), BlockData, BlockSize) == 0);
FormValue = DieDG.find(Attr_DW_FORM_block1);
EXPECT_TRUE((bool)FormValue);
BlockDataOpt = FormValue->getAsBlock();
EXPECT_TRUE(BlockDataOpt.hasValue());
ExtractedBlockData = BlockDataOpt.getValue();
EXPECT_EQ(ExtractedBlockData.size(), BlockSize);
EXPECT_TRUE(memcmp(ExtractedBlockData.data(), BlockData, BlockSize) == 0);
FormValue = DieDG.find(Attr_DW_FORM_block2);
EXPECT_TRUE((bool)FormValue);
BlockDataOpt = FormValue->getAsBlock();
EXPECT_TRUE(BlockDataOpt.hasValue());
ExtractedBlockData = BlockDataOpt.getValue();
EXPECT_EQ(ExtractedBlockData.size(), BlockSize);
EXPECT_TRUE(memcmp(ExtractedBlockData.data(), BlockData, BlockSize) == 0);
FormValue = DieDG.find(Attr_DW_FORM_block4);
EXPECT_TRUE((bool)FormValue);
BlockDataOpt = FormValue->getAsBlock();
EXPECT_TRUE(BlockDataOpt.hasValue());
ExtractedBlockData = BlockDataOpt.getValue();
EXPECT_EQ(ExtractedBlockData.size(), BlockSize);
EXPECT_TRUE(memcmp(ExtractedBlockData.data(), BlockData, BlockSize) == 0);
// Data16 is handled like a block.
if (Version >= 5) {
FormValue = DieDG.find(Attr_DW_FORM_data16);
EXPECT_TRUE((bool)FormValue);
BlockDataOpt = FormValue->getAsBlock();
EXPECT_TRUE(BlockDataOpt.hasValue());
ExtractedBlockData = BlockDataOpt.getValue();
EXPECT_EQ(ExtractedBlockData.size(), 16u);
EXPECT_TRUE(memcmp(ExtractedBlockData.data(), Data16, 16) == 0);
}
//----------------------------------------------------------------------
// Test data forms
//----------------------------------------------------------------------
EXPECT_EQ(Data1, toUnsigned(DieDG.find(Attr_DW_FORM_data1), 0));
EXPECT_EQ(Data2, toUnsigned(DieDG.find(Attr_DW_FORM_data2), 0));
EXPECT_EQ(Data4, toUnsigned(DieDG.find(Attr_DW_FORM_data4), 0));
EXPECT_EQ(Data8, toUnsigned(DieDG.find(Attr_DW_FORM_data8), 0));
//----------------------------------------------------------------------
// Test string forms
//----------------------------------------------------------------------
auto ExtractedStringValue = toString(DieDG.find(Attr_DW_FORM_string));
EXPECT_TRUE((bool)ExtractedStringValue);
EXPECT_STREQ(StringValue, *ExtractedStringValue);
if (Version >= 5) {
auto ExtractedStrxValue = toString(DieDG.find(Attr_DW_FORM_strx));
EXPECT_TRUE((bool)ExtractedStrxValue);
EXPECT_STREQ(StrxValue, *ExtractedStrxValue);
auto ExtractedStrx1Value = toString(DieDG.find(Attr_DW_FORM_strx1));
EXPECT_TRUE((bool)ExtractedStrx1Value);
EXPECT_STREQ(Strx1Value, *ExtractedStrx1Value);
auto ExtractedStrx2Value = toString(DieDG.find(Attr_DW_FORM_strx2));
EXPECT_TRUE((bool)ExtractedStrx2Value);
EXPECT_STREQ(Strx2Value, *ExtractedStrx2Value);
auto ExtractedStrx3Value = toString(DieDG.find(Attr_DW_FORM_strx3));
EXPECT_TRUE((bool)ExtractedStrx3Value);
EXPECT_STREQ(Strx3Value, *ExtractedStrx3Value);
auto ExtractedStrx4Value = toString(DieDG.find(Attr_DW_FORM_strx4));
EXPECT_TRUE((bool)ExtractedStrx4Value);
EXPECT_STREQ(Strx4Value, *ExtractedStrx4Value);
}
auto ExtractedStrpValue = toString(DieDG.find(Attr_DW_FORM_strp));
EXPECT_TRUE((bool)ExtractedStrpValue);
EXPECT_STREQ(StrpValue, *ExtractedStrpValue);
//----------------------------------------------------------------------
// Test reference forms
//----------------------------------------------------------------------
EXPECT_EQ(RefAddr, toReference(DieDG.find(Attr_DW_FORM_ref_addr), 0));
EXPECT_EQ(Data1, toReference(DieDG.find(Attr_DW_FORM_ref1), 0));
EXPECT_EQ(Data2, toReference(DieDG.find(Attr_DW_FORM_ref2), 0));
EXPECT_EQ(Data4, toReference(DieDG.find(Attr_DW_FORM_ref4), 0));
EXPECT_EQ(Data8, toReference(DieDG.find(Attr_DW_FORM_ref8), 0));
if (Version >= 4) {
EXPECT_EQ(Data8_2, toReference(DieDG.find(Attr_DW_FORM_ref_sig8), 0));
}
EXPECT_EQ(UData[0], toReference(DieDG.find(Attr_DW_FORM_ref_udata), 0));
//----------------------------------------------------------------------
// Test flag forms
//----------------------------------------------------------------------
EXPECT_EQ(1ULL, toUnsigned(DieDG.find(Attr_DW_FORM_flag_true), 0));
EXPECT_EQ(0ULL, toUnsigned(DieDG.find(Attr_DW_FORM_flag_false), 1));
if (Version >= 4) {
EXPECT_EQ(1ULL, toUnsigned(DieDG.find(Attr_DW_FORM_flag_present), 0));
}
//----------------------------------------------------------------------
// Test SLEB128 based forms
//----------------------------------------------------------------------
EXPECT_EQ(SData, toSigned(DieDG.find(Attr_DW_FORM_sdata), 0));
if (Version >= 5) {
EXPECT_EQ(ICSData, toSigned(DieDG.find(Attr_DW_FORM_implicit_const), 0));
}
//----------------------------------------------------------------------
// Test ULEB128 based forms
//----------------------------------------------------------------------
EXPECT_EQ(UData[0], toUnsigned(DieDG.find(Attr_DW_FORM_udata), 0));
//----------------------------------------------------------------------
// Test DWARF32/DWARF64 forms
//----------------------------------------------------------------------
EXPECT_EQ(Dwarf32Values[0],
toReference(DieDG.find(Attr_DW_FORM_GNU_ref_alt), 0));
if (Version >= 4) {
EXPECT_EQ(Dwarf32Values[1],
toSectionOffset(DieDG.find(Attr_DW_FORM_sec_offset), 0));
}
//----------------------------------------------------------------------
// Add an address at the end to make sure we can decode this value
//----------------------------------------------------------------------
EXPECT_EQ(AddrValue, toAddress(DieDG.find(Attr_Last), 0));
}
TEST(DWARFDebugInfo, TestDWARF32Version2Addr4AllForms) {
// Test that we can decode all forms for DWARF32, version 2, with 4 byte
// addresses.
typedef uint32_t AddrType;
// DW_FORM_ref_addr are the same as the address type in DWARF32 version 2.
typedef AddrType RefAddrType;
TestAllForms<2, AddrType, RefAddrType>();
}
TEST(DWARFDebugInfo, TestDWARF32Version2Addr8AllForms) {
// Test that we can decode all forms for DWARF32, version 2, with 4 byte
// addresses.
typedef uint64_t AddrType;
// DW_FORM_ref_addr are the same as the address type in DWARF32 version 2.
typedef AddrType RefAddrType;
TestAllForms<2, AddrType, RefAddrType>();
}
TEST(DWARFDebugInfo, TestDWARF32Version3Addr4AllForms) {
// Test that we can decode all forms for DWARF32, version 3, with 4 byte
// addresses.
typedef uint32_t AddrType;
// DW_FORM_ref_addr are 4 bytes in DWARF32 for version 3 and later.
typedef uint32_t RefAddrType;
TestAllForms<3, AddrType, RefAddrType>();
}
TEST(DWARFDebugInfo, TestDWARF32Version3Addr8AllForms) {
// Test that we can decode all forms for DWARF32, version 3, with 8 byte
// addresses.
typedef uint64_t AddrType;
// DW_FORM_ref_addr are 4 bytes in DWARF32 for version 3 and later
typedef uint32_t RefAddrType;
TestAllForms<3, AddrType, RefAddrType>();
}
TEST(DWARFDebugInfo, TestDWARF32Version4Addr4AllForms) {
// Test that we can decode all forms for DWARF32, version 4, with 4 byte
// addresses.
typedef uint32_t AddrType;
// DW_FORM_ref_addr are 4 bytes in DWARF32 for version 3 and later
typedef uint32_t RefAddrType;
TestAllForms<4, AddrType, RefAddrType>();
}
TEST(DWARFDebugInfo, TestDWARF32Version4Addr8AllForms) {
// Test that we can decode all forms for DWARF32, version 4, with 8 byte
// addresses.
typedef uint64_t AddrType;
// DW_FORM_ref_addr are 4 bytes in DWARF32 for version 3 and later
typedef uint32_t RefAddrType;
TestAllForms<4, AddrType, RefAddrType>();
}
TEST(DWARFDebugInfo, TestDWARF32Version5Addr4AllForms) {
// Test that we can decode all forms for DWARF32, version 5, with 4 byte
// addresses.
typedef uint32_t AddrType;
// DW_FORM_ref_addr are 4 bytes in DWARF32 for version 3 and later
typedef uint32_t RefAddrType;
TestAllForms<5, AddrType, RefAddrType>();
}
TEST(DWARFDebugInfo, TestDWARF32Version5Addr8AllForms) {
// Test that we can decode all forms for DWARF32, version 5, with 8 byte
// addresses.
typedef uint64_t AddrType;
// DW_FORM_ref_addr are 4 bytes in DWARF32 for version 3 and later
typedef uint32_t RefAddrType;
TestAllForms<5, AddrType, RefAddrType>();
}
template <uint16_t Version, class AddrType> void TestChildren() {
Triple Triple = getDefaultTargetTripleForAddrSize(sizeof(AddrType));
if (!isConfigurationSupported(Triple))
return;
// Test that we can decode DW_FORM_ref_addr values correctly in DWARF 2 with
// 4 byte addresses. DW_FORM_ref_addr values should be 4 bytes when using
// 8 byte addresses.
auto ExpectedDG = dwarfgen::Generator::create(Triple, Version);
ASSERT_THAT_EXPECTED(ExpectedDG, Succeeded());
dwarfgen::Generator *DG = ExpectedDG.get().get();
dwarfgen::CompileUnit &CU = DG->addCompileUnit();
dwarfgen::DIE CUDie = CU.getUnitDIE();
CUDie.addAttribute(DW_AT_name, DW_FORM_strp, "/tmp/main.c");
CUDie.addAttribute(DW_AT_language, DW_FORM_data2, DW_LANG_C);
dwarfgen::DIE SubprogramDie = CUDie.addChild(DW_TAG_subprogram);
SubprogramDie.addAttribute(DW_AT_name, DW_FORM_strp, "main");
SubprogramDie.addAttribute(DW_AT_low_pc, DW_FORM_addr, 0x1000U);
SubprogramDie.addAttribute(DW_AT_high_pc, DW_FORM_addr, 0x2000U);
dwarfgen::DIE IntDie = CUDie.addChild(DW_TAG_base_type);
IntDie.addAttribute(DW_AT_name, DW_FORM_strp, "int");
IntDie.addAttribute(DW_AT_encoding, DW_FORM_data1, DW_ATE_signed);
IntDie.addAttribute(DW_AT_byte_size, DW_FORM_data1, 4);
dwarfgen::DIE ArgcDie = SubprogramDie.addChild(DW_TAG_formal_parameter);
ArgcDie.addAttribute(DW_AT_name, DW_FORM_strp, "argc");
// ArgcDie.addAttribute(DW_AT_type, DW_FORM_ref4, IntDie);
ArgcDie.addAttribute(DW_AT_type, DW_FORM_ref_addr, IntDie);
StringRef FileBytes = DG->generate();
MemoryBufferRef FileBuffer(FileBytes, "dwarf");
auto Obj = object::ObjectFile::createObjectFile(FileBuffer);
EXPECT_TRUE((bool)Obj);
std::unique_ptr<DWARFContext> DwarfContext = DWARFContext::create(**Obj);
// Verify the number of compile units is correct.
uint32_t NumCUs = DwarfContext->getNumCompileUnits();
EXPECT_EQ(NumCUs, 1u);
DWARFCompileUnit *U =
cast<DWARFCompileUnit>(DwarfContext->getUnitAtIndex(0));
// Get the compile unit DIE is valid.
auto DieDG = U->getUnitDIE(false);
EXPECT_TRUE(DieDG.isValid());
// Verify the first child of the compile unit DIE is our subprogram.
auto SubprogramDieDG = DieDG.getFirstChild();
EXPECT_TRUE(SubprogramDieDG.isValid());
EXPECT_EQ(SubprogramDieDG.getTag(), DW_TAG_subprogram);
// Verify the first child of the subprogram is our formal parameter.
auto ArgcDieDG = SubprogramDieDG.getFirstChild();
EXPECT_TRUE(ArgcDieDG.isValid());
EXPECT_EQ(ArgcDieDG.getTag(), DW_TAG_formal_parameter);
// Verify our formal parameter has a NULL tag sibling.
auto NullDieDG = ArgcDieDG.getSibling();
EXPECT_TRUE(NullDieDG.isValid());
if (NullDieDG) {
EXPECT_EQ(NullDieDG.getTag(), DW_TAG_null);
EXPECT_TRUE(!NullDieDG.getSibling().isValid());
EXPECT_TRUE(!NullDieDG.getFirstChild().isValid());
}
// Verify the sibling of our subprogram is our integer base type.
auto IntDieDG = SubprogramDieDG.getSibling();
EXPECT_TRUE(IntDieDG.isValid());
EXPECT_EQ(IntDieDG.getTag(), DW_TAG_base_type);
// Verify the sibling of our subprogram is our integer base is a NULL tag.
NullDieDG = IntDieDG.getSibling();
EXPECT_TRUE(NullDieDG.isValid());
if (NullDieDG) {
EXPECT_EQ(NullDieDG.getTag(), DW_TAG_null);
EXPECT_TRUE(!NullDieDG.getSibling().isValid());
EXPECT_TRUE(!NullDieDG.getFirstChild().isValid());
}
// Verify the previous sibling of our subprogram is our integer base type.
IntDieDG = NullDieDG.getPreviousSibling();
EXPECT_TRUE(IntDieDG.isValid());
EXPECT_EQ(IntDieDG.getTag(), DW_TAG_base_type);
}
TEST(DWARFDebugInfo, TestDWARF32Version2Addr4Children) {
// Test that we can decode all forms for DWARF32, version 2, with 4 byte
// addresses.
typedef uint32_t AddrType;
TestChildren<2, AddrType>();
}
TEST(DWARFDebugInfo, TestDWARF32Version2Addr8Children) {
// Test that we can decode all forms for DWARF32, version 2, with 8 byte
// addresses.
typedef uint64_t AddrType;
TestChildren<2, AddrType>();
}
TEST(DWARFDebugInfo, TestDWARF32Version3Addr4Children) {
// Test that we can decode all forms for DWARF32, version 3, with 4 byte
// addresses.
typedef uint32_t AddrType;
TestChildren<3, AddrType>();
}
TEST(DWARFDebugInfo, TestDWARF32Version3Addr8Children) {
// Test that we can decode all forms for DWARF32, version 3, with 8 byte
// addresses.
typedef uint64_t AddrType;
TestChildren<3, AddrType>();
}
TEST(DWARFDebugInfo, TestDWARF32Version4Addr4Children) {
// Test that we can decode all forms for DWARF32, version 4, with 4 byte
// addresses.
typedef uint32_t AddrType;
TestChildren<4, AddrType>();
}
TEST(DWARFDebugInfo, TestDWARF32Version4Addr8Children) {
// Test that we can decode all forms for DWARF32, version 4, with 8 byte
// addresses.
typedef uint64_t AddrType;
TestChildren<4, AddrType>();
}
template <uint16_t Version, class AddrType> void TestReferences() {
Triple Triple = getDefaultTargetTripleForAddrSize(sizeof(AddrType));
if (!isConfigurationSupported(Triple))
return;
// Test that we can decode DW_FORM_refXXX values correctly in DWARF.
auto ExpectedDG = dwarfgen::Generator::create(Triple, Version);
ASSERT_THAT_EXPECTED(ExpectedDG, Succeeded());
dwarfgen::Generator *DG = ExpectedDG.get().get();
dwarfgen::CompileUnit &CU1 = DG->addCompileUnit();
dwarfgen::CompileUnit &CU2 = DG->addCompileUnit();
dwarfgen::DIE CU1Die = CU1.getUnitDIE();
CU1Die.addAttribute(DW_AT_name, DW_FORM_strp, "/tmp/main.c");
CU1Die.addAttribute(DW_AT_language, DW_FORM_data2, DW_LANG_C);
dwarfgen::DIE CU1TypeDie = CU1Die.addChild(DW_TAG_base_type);
CU1TypeDie.addAttribute(DW_AT_name, DW_FORM_strp, "int");
CU1TypeDie.addAttribute(DW_AT_encoding, DW_FORM_data1, DW_ATE_signed);
CU1TypeDie.addAttribute(DW_AT_byte_size, DW_FORM_data1, 4);
dwarfgen::DIE CU1Ref1Die = CU1Die.addChild(DW_TAG_variable);
CU1Ref1Die.addAttribute(DW_AT_name, DW_FORM_strp, "CU1Ref1");
CU1Ref1Die.addAttribute(DW_AT_type, DW_FORM_ref1, CU1TypeDie);
dwarfgen::DIE CU1Ref2Die = CU1Die.addChild(DW_TAG_variable);
CU1Ref2Die.addAttribute(DW_AT_name, DW_FORM_strp, "CU1Ref2");
CU1Ref2Die.addAttribute(DW_AT_type, DW_FORM_ref2, CU1TypeDie);
dwarfgen::DIE CU1Ref4Die = CU1Die.addChild(DW_TAG_variable);
CU1Ref4Die.addAttribute(DW_AT_name, DW_FORM_strp, "CU1Ref4");
CU1Ref4Die.addAttribute(DW_AT_type, DW_FORM_ref4, CU1TypeDie);
dwarfgen::DIE CU1Ref8Die = CU1Die.addChild(DW_TAG_variable);
CU1Ref8Die.addAttribute(DW_AT_name, DW_FORM_strp, "CU1Ref8");
CU1Ref8Die.addAttribute(DW_AT_type, DW_FORM_ref8, CU1TypeDie);
dwarfgen::DIE CU1RefAddrDie = CU1Die.addChild(DW_TAG_variable);
CU1RefAddrDie.addAttribute(DW_AT_name, DW_FORM_strp, "CU1RefAddr");
CU1RefAddrDie.addAttribute(DW_AT_type, DW_FORM_ref_addr, CU1TypeDie);
dwarfgen::DIE CU2Die = CU2.getUnitDIE();
CU2Die.addAttribute(DW_AT_name, DW_FORM_strp, "/tmp/foo.c");
CU2Die.addAttribute(DW_AT_language, DW_FORM_data2, DW_LANG_C);
dwarfgen::DIE CU2TypeDie = CU2Die.addChild(DW_TAG_base_type);
CU2TypeDie.addAttribute(DW_AT_name, DW_FORM_strp, "float");
CU2TypeDie.addAttribute(DW_AT_encoding, DW_FORM_data1, DW_ATE_float);
CU2TypeDie.addAttribute(DW_AT_byte_size, DW_FORM_data1, 4);
dwarfgen::DIE CU2Ref1Die = CU2Die.addChild(DW_TAG_variable);
CU2Ref1Die.addAttribute(DW_AT_name, DW_FORM_strp, "CU2Ref1");
CU2Ref1Die.addAttribute(DW_AT_type, DW_FORM_ref1, CU2TypeDie);
dwarfgen::DIE CU2Ref2Die = CU2Die.addChild(DW_TAG_variable);
CU2Ref2Die.addAttribute(DW_AT_name, DW_FORM_strp, "CU2Ref2");
CU2Ref2Die.addAttribute(DW_AT_type, DW_FORM_ref2, CU2TypeDie);
dwarfgen::DIE CU2Ref4Die = CU2Die.addChild(DW_TAG_variable);
CU2Ref4Die.addAttribute(DW_AT_name, DW_FORM_strp, "CU2Ref4");
CU2Ref4Die.addAttribute(DW_AT_type, DW_FORM_ref4, CU2TypeDie);
dwarfgen::DIE CU2Ref8Die = CU2Die.addChild(DW_TAG_variable);
CU2Ref8Die.addAttribute(DW_AT_name, DW_FORM_strp, "CU2Ref8");
CU2Ref8Die.addAttribute(DW_AT_type, DW_FORM_ref8, CU2TypeDie);
dwarfgen::DIE CU2RefAddrDie = CU2Die.addChild(DW_TAG_variable);
CU2RefAddrDie.addAttribute(DW_AT_name, DW_FORM_strp, "CU2RefAddr");
CU2RefAddrDie.addAttribute(DW_AT_type, DW_FORM_ref_addr, CU2TypeDie);
// Refer to a type in CU1 from CU2
dwarfgen::DIE CU2ToCU1RefAddrDie = CU2Die.addChild(DW_TAG_variable);
CU2ToCU1RefAddrDie.addAttribute(DW_AT_name, DW_FORM_strp, "CU2ToCU1RefAddr");
CU2ToCU1RefAddrDie.addAttribute(DW_AT_type, DW_FORM_ref_addr, CU1TypeDie);
// Refer to a type in CU2 from CU1
dwarfgen::DIE CU1ToCU2RefAddrDie = CU1Die.addChild(DW_TAG_variable);
CU1ToCU2RefAddrDie.addAttribute(DW_AT_name, DW_FORM_strp, "CU1ToCU2RefAddr");
CU1ToCU2RefAddrDie.addAttribute(DW_AT_type, DW_FORM_ref_addr, CU2TypeDie);
StringRef FileBytes = DG->generate();
MemoryBufferRef FileBuffer(FileBytes, "dwarf");
auto Obj = object::ObjectFile::createObjectFile(FileBuffer);
EXPECT_TRUE((bool)Obj);
std::unique_ptr<DWARFContext> DwarfContext = DWARFContext::create(**Obj);
// Verify the number of compile units is correct.
uint32_t NumCUs = DwarfContext->getNumCompileUnits();
EXPECT_EQ(NumCUs, 2u);
DWARFCompileUnit *U1 =
cast<DWARFCompileUnit>(DwarfContext->getUnitAtIndex(0));
DWARFCompileUnit *U2 =
cast<DWARFCompileUnit>(DwarfContext->getUnitAtIndex(1));
// Get the compile unit DIE is valid.
auto Unit1DieDG = U1->getUnitDIE(false);
EXPECT_TRUE(Unit1DieDG.isValid());
auto Unit2DieDG = U2->getUnitDIE(false);
EXPECT_TRUE(Unit2DieDG.isValid());
// Verify the first child of the compile unit 1 DIE is our int base type.
auto CU1TypeDieDG = Unit1DieDG.getFirstChild();
EXPECT_TRUE(CU1TypeDieDG.isValid());
EXPECT_EQ(CU1TypeDieDG.getTag(), DW_TAG_base_type);
EXPECT_EQ(DW_ATE_signed, toUnsigned(CU1TypeDieDG.find(DW_AT_encoding), 0));
// Verify the first child of the compile unit 2 DIE is our float base type.
auto CU2TypeDieDG = Unit2DieDG.getFirstChild();
EXPECT_TRUE(CU2TypeDieDG.isValid());
EXPECT_EQ(CU2TypeDieDG.getTag(), DW_TAG_base_type);
EXPECT_EQ(DW_ATE_float, toUnsigned(CU2TypeDieDG.find(DW_AT_encoding), 0));
// Verify the sibling of the base type DIE is our Ref1 DIE and that its
// DW_AT_type points to our base type DIE.
auto CU1Ref1DieDG = CU1TypeDieDG.getSibling();
EXPECT_TRUE(CU1Ref1DieDG.isValid());
EXPECT_EQ(CU1Ref1DieDG.getTag(), DW_TAG_variable);
EXPECT_EQ(CU1TypeDieDG.getOffset(),
toReference(CU1Ref1DieDG.find(DW_AT_type), -1ULL));
// Verify the sibling is our Ref2 DIE and that its DW_AT_type points to our
// base type DIE in CU1.
auto CU1Ref2DieDG = CU1Ref1DieDG.getSibling();
EXPECT_TRUE(CU1Ref2DieDG.isValid());
EXPECT_EQ(CU1Ref2DieDG.getTag(), DW_TAG_variable);
EXPECT_EQ(CU1TypeDieDG.getOffset(),
toReference(CU1Ref2DieDG.find(DW_AT_type), -1ULL));
// Verify the sibling is our Ref4 DIE and that its DW_AT_type points to our
// base type DIE in CU1.
auto CU1Ref4DieDG = CU1Ref2DieDG.getSibling();
EXPECT_TRUE(CU1Ref4DieDG.isValid());
EXPECT_EQ(CU1Ref4DieDG.getTag(), DW_TAG_variable);
EXPECT_EQ(CU1TypeDieDG.getOffset(),
toReference(CU1Ref4DieDG.find(DW_AT_type), -1ULL));
// Verify the sibling is our Ref8 DIE and that its DW_AT_type points to our
// base type DIE in CU1.
auto CU1Ref8DieDG = CU1Ref4DieDG.getSibling();
EXPECT_TRUE(CU1Ref8DieDG.isValid());
EXPECT_EQ(CU1Ref8DieDG.getTag(), DW_TAG_variable);
EXPECT_EQ(CU1TypeDieDG.getOffset(),
toReference(CU1Ref8DieDG.find(DW_AT_type), -1ULL));
// Verify the sibling is our RefAddr DIE and that its DW_AT_type points to our
// base type DIE in CU1.
auto CU1RefAddrDieDG = CU1Ref8DieDG.getSibling();
EXPECT_TRUE(CU1RefAddrDieDG.isValid());
EXPECT_EQ(CU1RefAddrDieDG.getTag(), DW_TAG_variable);
EXPECT_EQ(CU1TypeDieDG.getOffset(),
toReference(CU1RefAddrDieDG.find(DW_AT_type), -1ULL));
// Verify the sibling of the Ref4 DIE is our RefAddr DIE and that its
// DW_AT_type points to our base type DIE.
auto CU1ToCU2RefAddrDieDG = CU1RefAddrDieDG.getSibling();
EXPECT_TRUE(CU1ToCU2RefAddrDieDG.isValid());
EXPECT_EQ(CU1ToCU2RefAddrDieDG.getTag(), DW_TAG_variable);
EXPECT_EQ(CU2TypeDieDG.getOffset(),
toReference(CU1ToCU2RefAddrDieDG.find(DW_AT_type), -1ULL));
// Verify the sibling of the base type DIE is our Ref1 DIE and that its
// DW_AT_type points to our base type DIE.
auto CU2Ref1DieDG = CU2TypeDieDG.getSibling();
EXPECT_TRUE(CU2Ref1DieDG.isValid());
EXPECT_EQ(CU2Ref1DieDG.getTag(), DW_TAG_variable);
EXPECT_EQ(CU2TypeDieDG.getOffset(),
toReference(CU2Ref1DieDG.find(DW_AT_type), -1ULL));
// Verify the sibling is our Ref2 DIE and that its DW_AT_type points to our
// base type DIE in CU2.
auto CU2Ref2DieDG = CU2Ref1DieDG.getSibling();
EXPECT_TRUE(CU2Ref2DieDG.isValid());
EXPECT_EQ(CU2Ref2DieDG.getTag(), DW_TAG_variable);
EXPECT_EQ(CU2TypeDieDG.getOffset(),
toReference(CU2Ref2DieDG.find(DW_AT_type), -1ULL));
// Verify the sibling is our Ref4 DIE and that its DW_AT_type points to our
// base type DIE in CU2.
auto CU2Ref4DieDG = CU2Ref2DieDG.getSibling();
EXPECT_TRUE(CU2Ref4DieDG.isValid());
EXPECT_EQ(CU2Ref4DieDG.getTag(), DW_TAG_variable);
EXPECT_EQ(CU2TypeDieDG.getOffset(),
toReference(CU2Ref4DieDG.find(DW_AT_type), -1ULL));
// Verify the sibling is our Ref8 DIE and that its DW_AT_type points to our
// base type DIE in CU2.
auto CU2Ref8DieDG = CU2Ref4DieDG.getSibling();
EXPECT_TRUE(CU2Ref8DieDG.isValid());
EXPECT_EQ(CU2Ref8DieDG.getTag(), DW_TAG_variable);
EXPECT_EQ(CU2TypeDieDG.getOffset(),
toReference(CU2Ref8DieDG.find(DW_AT_type), -1ULL));
// Verify the sibling is our RefAddr DIE and that its DW_AT_type points to our
// base type DIE in CU2.
auto CU2RefAddrDieDG = CU2Ref8DieDG.getSibling();
EXPECT_TRUE(CU2RefAddrDieDG.isValid());
EXPECT_EQ(CU2RefAddrDieDG.getTag(), DW_TAG_variable);
EXPECT_EQ(CU2TypeDieDG.getOffset(),
toReference(CU2RefAddrDieDG.find(DW_AT_type), -1ULL));
// Verify the sibling of the Ref4 DIE is our RefAddr DIE and that its
// DW_AT_type points to our base type DIE.
auto CU2ToCU1RefAddrDieDG = CU2RefAddrDieDG.getSibling();
EXPECT_TRUE(CU2ToCU1RefAddrDieDG.isValid());
EXPECT_EQ(CU2ToCU1RefAddrDieDG.getTag(), DW_TAG_variable);
EXPECT_EQ(CU1TypeDieDG.getOffset(),
toReference(CU2ToCU1RefAddrDieDG.find(DW_AT_type), -1ULL));
}
TEST(DWARFDebugInfo, TestDWARF32Version2Addr4References) {
// Test that we can decode all forms for DWARF32, version 2, with 4 byte
// addresses.
typedef uint32_t AddrType;
TestReferences<2, AddrType>();
}
TEST(DWARFDebugInfo, TestDWARF32Version2Addr8References) {
// Test that we can decode all forms for DWARF32, version 2, with 8 byte
// addresses.
typedef uint64_t AddrType;
TestReferences<2, AddrType>();
}
TEST(DWARFDebugInfo, TestDWARF32Version3Addr4References) {
// Test that we can decode all forms for DWARF32, version 3, with 4 byte
// addresses.
typedef uint32_t AddrType;
TestReferences<3, AddrType>();
}
TEST(DWARFDebugInfo, TestDWARF32Version3Addr8References) {
// Test that we can decode all forms for DWARF32, version 3, with 8 byte
// addresses.
typedef uint64_t AddrType;
TestReferences<3, AddrType>();
}
TEST(DWARFDebugInfo, TestDWARF32Version4Addr4References) {
// Test that we can decode all forms for DWARF32, version 4, with 4 byte
// addresses.
typedef uint32_t AddrType;
TestReferences<4, AddrType>();
}
TEST(DWARFDebugInfo, TestDWARF32Version4Addr8References) {
// Test that we can decode all forms for DWARF32, version 4, with 8 byte
// addresses.
typedef uint64_t AddrType;
TestReferences<4, AddrType>();
}
template <uint16_t Version, class AddrType> void TestAddresses() {
Triple Triple = getDefaultTargetTripleForAddrSize(sizeof(AddrType));
if (!isConfigurationSupported(Triple))
return;
// Test the DWARF APIs related to accessing the DW_AT_low_pc and
// DW_AT_high_pc.
const bool SupportsHighPCAsOffset = Version >= 4;
auto ExpectedDG = dwarfgen::Generator::create(Triple, Version);
ASSERT_THAT_EXPECTED(ExpectedDG, Succeeded());
dwarfgen::Generator *DG = ExpectedDG.get().get();
dwarfgen::CompileUnit &CU = DG->addCompileUnit();
dwarfgen::DIE CUDie = CU.getUnitDIE();
CUDie.addAttribute(DW_AT_name, DW_FORM_strp, "/tmp/main.c");
CUDie.addAttribute(DW_AT_language, DW_FORM_data2, DW_LANG_C);
// Create a subprogram DIE with no low or high PC.
dwarfgen::DIE SubprogramNoPC = CUDie.addChild(DW_TAG_subprogram);
SubprogramNoPC.addAttribute(DW_AT_name, DW_FORM_strp, "no_pc");
// Create a subprogram DIE with a low PC only.
dwarfgen::DIE SubprogramLowPC = CUDie.addChild(DW_TAG_subprogram);
SubprogramLowPC.addAttribute(DW_AT_name, DW_FORM_strp, "low_pc");
const uint64_t ActualLowPC = 0x1000;
const uint64_t ActualHighPC = 0x2000;
const uint64_t ActualHighPCOffset = ActualHighPC - ActualLowPC;
SubprogramLowPC.addAttribute(DW_AT_low_pc, DW_FORM_addr, ActualLowPC);
// Create a subprogram DIE with a low and high PC.
dwarfgen::DIE SubprogramLowHighPC = CUDie.addChild(DW_TAG_subprogram);
SubprogramLowHighPC.addAttribute(DW_AT_name, DW_FORM_strp, "low_high_pc");
SubprogramLowHighPC.addAttribute(DW_AT_low_pc, DW_FORM_addr, ActualLowPC);
// Encode the high PC as an offset from the low PC if supported.
if (SupportsHighPCAsOffset)
SubprogramLowHighPC.addAttribute(DW_AT_high_pc, DW_FORM_data4,
ActualHighPCOffset);
else
SubprogramLowHighPC.addAttribute(DW_AT_high_pc, DW_FORM_addr, ActualHighPC);
StringRef FileBytes = DG->generate();
MemoryBufferRef FileBuffer(FileBytes, "dwarf");
auto Obj = object::ObjectFile::createObjectFile(FileBuffer);
EXPECT_TRUE((bool)Obj);
std::unique_ptr<DWARFContext> DwarfContext = DWARFContext::create(**Obj);
// Verify the number of compile units is correct.
uint32_t NumCUs = DwarfContext->getNumCompileUnits();
EXPECT_EQ(NumCUs, 1u);
DWARFCompileUnit *U =
cast<DWARFCompileUnit>(DwarfContext->getUnitAtIndex(0));
// Get the compile unit DIE is valid.
auto DieDG = U->getUnitDIE(false);
EXPECT_TRUE(DieDG.isValid());
uint64_t LowPC, HighPC, SectionIndex;
Optional<uint64_t> OptU64;
// Verify the that our subprogram with no PC value fails appropriately when
// asked for any PC values.
auto SubprogramDieNoPC = DieDG.getFirstChild();
EXPECT_TRUE(SubprogramDieNoPC.isValid());
EXPECT_EQ(SubprogramDieNoPC.getTag(), DW_TAG_subprogram);
OptU64 = toAddress(SubprogramDieNoPC.find(DW_AT_low_pc));
EXPECT_FALSE((bool)OptU64);
OptU64 = toAddress(SubprogramDieNoPC.find(DW_AT_high_pc));
EXPECT_FALSE((bool)OptU64);
EXPECT_FALSE(SubprogramDieNoPC.getLowAndHighPC(LowPC, HighPC, SectionIndex));
OptU64 = toAddress(SubprogramDieNoPC.find(DW_AT_high_pc));
EXPECT_FALSE((bool)OptU64);
OptU64 = toUnsigned(SubprogramDieNoPC.find(DW_AT_high_pc));
EXPECT_FALSE((bool)OptU64);
OptU64 = SubprogramDieNoPC.getHighPC(ActualLowPC);
EXPECT_FALSE((bool)OptU64);
EXPECT_FALSE(SubprogramDieNoPC.getLowAndHighPC(LowPC, HighPC, SectionIndex));
// Verify the that our subprogram with only a low PC value succeeds when
// we ask for the Low PC, but fails appropriately when asked for the high PC
// or both low and high PC values.
auto SubprogramDieLowPC = SubprogramDieNoPC.getSibling();
EXPECT_TRUE(SubprogramDieLowPC.isValid());
EXPECT_EQ(SubprogramDieLowPC.getTag(), DW_TAG_subprogram);
OptU64 = toAddress(SubprogramDieLowPC.find(DW_AT_low_pc));
EXPECT_TRUE((bool)OptU64);
EXPECT_EQ(OptU64.getValue(), ActualLowPC);
OptU64 = toAddress(SubprogramDieLowPC.find(DW_AT_high_pc));
EXPECT_FALSE((bool)OptU64);
OptU64 = toUnsigned(SubprogramDieLowPC.find(DW_AT_high_pc));
EXPECT_FALSE((bool)OptU64);
OptU64 = SubprogramDieLowPC.getHighPC(ActualLowPC);
EXPECT_FALSE((bool)OptU64);
EXPECT_FALSE(SubprogramDieLowPC.getLowAndHighPC(LowPC, HighPC, SectionIndex));
// Verify the that our subprogram with only a low PC value succeeds when
// we ask for the Low PC, but fails appropriately when asked for the high PC
// or both low and high PC values.
auto SubprogramDieLowHighPC = SubprogramDieLowPC.getSibling();
EXPECT_TRUE(SubprogramDieLowHighPC.isValid());
EXPECT_EQ(SubprogramDieLowHighPC.getTag(), DW_TAG_subprogram);
OptU64 = toAddress(SubprogramDieLowHighPC.find(DW_AT_low_pc));
EXPECT_TRUE((bool)OptU64);
EXPECT_EQ(OptU64.getValue(), ActualLowPC);
// Get the high PC as an address. This should succeed if the high PC was
// encoded as an address and fail if the high PC was encoded as an offset.
OptU64 = toAddress(SubprogramDieLowHighPC.find(DW_AT_high_pc));
if (SupportsHighPCAsOffset) {
EXPECT_FALSE((bool)OptU64);
} else {
EXPECT_TRUE((bool)OptU64);
EXPECT_EQ(OptU64.getValue(), ActualHighPC);
}
// Get the high PC as an unsigned constant. This should succeed if the high PC
// was encoded as an offset and fail if the high PC was encoded as an address.
OptU64 = toUnsigned(SubprogramDieLowHighPC.find(DW_AT_high_pc));
if (SupportsHighPCAsOffset) {
EXPECT_TRUE((bool)OptU64);
EXPECT_EQ(OptU64.getValue(), ActualHighPCOffset);
} else {
EXPECT_FALSE((bool)OptU64);
}
OptU64 = SubprogramDieLowHighPC.getHighPC(ActualLowPC);
EXPECT_TRUE((bool)OptU64);
EXPECT_EQ(OptU64.getValue(), ActualHighPC);
EXPECT_TRUE(SubprogramDieLowHighPC.getLowAndHighPC(LowPC, HighPC, SectionIndex));
EXPECT_EQ(LowPC, ActualLowPC);
EXPECT_EQ(HighPC, ActualHighPC);
}
TEST(DWARFDebugInfo, TestDWARF32Version2Addr4Addresses) {
// Test that we can decode address values in DWARF32, version 2, with 4 byte
// addresses.
typedef uint32_t AddrType;
TestAddresses<2, AddrType>();
}
TEST(DWARFDebugInfo, TestDWARF32Version2Addr8Addresses) {
// Test that we can decode address values in DWARF32, version 2, with 8 byte
// addresses.
typedef uint64_t AddrType;
TestAddresses<2, AddrType>();
}
TEST(DWARFDebugInfo, TestDWARF32Version3Addr4Addresses) {
// Test that we can decode address values in DWARF32, version 3, with 4 byte
// addresses.
typedef uint32_t AddrType;
TestAddresses<3, AddrType>();
}
TEST(DWARFDebugInfo, TestDWARF32Version3Addr8Addresses) {
// Test that we can decode address values in DWARF32, version 3, with 8 byte
// addresses.
typedef uint64_t AddrType;
TestAddresses<3, AddrType>();
}
TEST(DWARFDebugInfo, TestDWARF32Version4Addr4Addresses) {
// Test that we can decode address values in DWARF32, version 4, with 4 byte
// addresses.
typedef uint32_t AddrType;
TestAddresses<4, AddrType>();
}
TEST(DWARFDebugInfo, TestDWARF32Version4Addr8Addresses) {
// Test that we can decode address values in DWARF32, version 4, with 8 byte
// addresses.
typedef uint64_t AddrType;
TestAddresses<4, AddrType>();
}
TEST(DWARFDebugInfo, TestStringOffsets) {
Triple Triple = getNormalizedDefaultTargetTriple();
if (!isConfigurationSupported(Triple))
return;
const char *String1 = "Hello";
const char *String2 = "World";
auto ExpectedDG = dwarfgen::Generator::create(Triple, 5);
ASSERT_THAT_EXPECTED(ExpectedDG, Succeeded());
dwarfgen::Generator *DG = ExpectedDG.get().get();
dwarfgen::CompileUnit &CU = DG->addCompileUnit();
dwarfgen::DIE CUDie = CU.getUnitDIE();
CUDie.addStrOffsetsBaseAttribute();
uint16_t Attr = DW_AT_lo_user;
// Create our strings. First we create a non-indexed reference to String1,
// followed by an indexed String2. Finally, we add an indexed reference to
// String1.
const auto Attr1 = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr1, DW_FORM_strp, String1);
const auto Attr2 = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr2, DW_FORM_strx, String2);
const auto Attr3 = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr3, DW_FORM_strx, String1);
// Generate the DWARF
StringRef FileBytes = DG->generate();
MemoryBufferRef FileBuffer(FileBytes, "dwarf");
auto Obj = object::ObjectFile::createObjectFile(FileBuffer);
ASSERT_TRUE((bool)Obj);
std::unique_ptr<DWARFContext> DwarfContext = DWARFContext::create(**Obj);
uint32_t NumCUs = DwarfContext->getNumCompileUnits();
ASSERT_EQ(NumCUs, 1u);
DWARFUnit *U = DwarfContext->getUnitAtIndex(0);
auto DieDG = U->getUnitDIE(false);
ASSERT_TRUE(DieDG.isValid());
// Now make sure the string offsets came out properly. Attr2 should have index
// 0 (because it was the first indexed string) even though the string itself
// was added eariler.
auto Extracted1 = toString(DieDG.find(Attr1));
ASSERT_TRUE((bool)Extracted1);
EXPECT_STREQ(String1, *Extracted1);
Optional<DWARFFormValue> Form2 = DieDG.find(Attr2);
ASSERT_TRUE((bool)Form2);
EXPECT_EQ(0u, Form2->getRawUValue());
auto Extracted2 = toString(Form2);
ASSERT_TRUE((bool)Extracted2);
EXPECT_STREQ(String2, *Extracted2);
Optional<DWARFFormValue> Form3 = DieDG.find(Attr3);
ASSERT_TRUE((bool)Form3);
EXPECT_EQ(1u, Form3->getRawUValue());
auto Extracted3 = toString(Form3);
ASSERT_TRUE((bool)Extracted3);
EXPECT_STREQ(String1, *Extracted3);
}
TEST(DWARFDebugInfo, TestEmptyStringOffsets) {
Triple Triple = getNormalizedDefaultTargetTriple();
if (!isConfigurationSupported(Triple))
return;
const char *String1 = "Hello";
auto ExpectedDG = dwarfgen::Generator::create(Triple, 5);
ASSERT_THAT_EXPECTED(ExpectedDG, Succeeded());
dwarfgen::Generator *DG = ExpectedDG.get().get();
dwarfgen::CompileUnit &CU = DG->addCompileUnit();
dwarfgen::DIE CUDie = CU.getUnitDIE();
uint16_t Attr = DW_AT_lo_user;
// We shall insert only one string. It will be referenced directly.
const auto Attr1 = static_cast<dwarf::Attribute>(Attr++);
CUDie.addAttribute(Attr1, DW_FORM_strp, String1);
// Generate the DWARF
StringRef FileBytes = DG->generate();
MemoryBufferRef FileBuffer(FileBytes, "dwarf");
auto Obj = object::ObjectFile::createObjectFile(FileBuffer);
ASSERT_TRUE((bool)Obj);
std::unique_ptr<DWARFContext> DwarfContext = DWARFContext::create(**Obj);
EXPECT_TRUE(
DwarfContext->getDWARFObj().getStrOffsetsSection().Data.empty());
}
TEST(DWARFDebugInfo, TestRelations) {
Triple Triple = getNormalizedDefaultTargetTriple();
if (!isConfigurationSupported(Triple))
return;
// Test the DWARF APIs related to accessing the DW_AT_low_pc and
// DW_AT_high_pc.
uint16_t Version = 4;
auto ExpectedDG = dwarfgen::Generator::create(Triple, Version);
ASSERT_THAT_EXPECTED(ExpectedDG, Succeeded());
dwarfgen::Generator *DG = ExpectedDG.get().get();
dwarfgen::CompileUnit &CU = DG->addCompileUnit();
enum class Tag: uint16_t {
A = dwarf::DW_TAG_lo_user,
B,
C,
C1,
C2,
D,
D1
};
// Scope to allow us to re-use the same DIE names
{
// Create DWARF tree that looks like:
//
// CU
// A
// B
// C
// C1
// C2
// D
// D1
dwarfgen::DIE CUDie = CU.getUnitDIE();
dwarfgen::DIE A = CUDie.addChild((dwarf::Tag)Tag::A);
A.addChild((dwarf::Tag)Tag::B);
dwarfgen::DIE C = A.addChild((dwarf::Tag)Tag::C);
dwarfgen::DIE D = A.addChild((dwarf::Tag)Tag::D);
C.addChild((dwarf::Tag)Tag::C1);
C.addChild((dwarf::Tag)Tag::C2);
D.addChild((dwarf::Tag)Tag::D1);
}
MemoryBufferRef FileBuffer(DG->generate(), "dwarf");
auto Obj = object::ObjectFile::createObjectFile(FileBuffer);
EXPECT_TRUE((bool)Obj);
std::unique_ptr<DWARFContext> DwarfContext = DWARFContext::create(**Obj);
// Verify the number of compile units is correct.
uint32_t NumCUs = DwarfContext->getNumCompileUnits();
EXPECT_EQ(NumCUs, 1u);
DWARFCompileUnit *U =
cast<DWARFCompileUnit>(DwarfContext->getUnitAtIndex(0));
// Get the compile unit DIE is valid.
auto CUDie = U->getUnitDIE(false);
EXPECT_TRUE(CUDie.isValid());
// The compile unit doesn't have a parent or a sibling.
auto ParentDie = CUDie.getParent();
EXPECT_FALSE(ParentDie.isValid());
auto SiblingDie = CUDie.getSibling();
EXPECT_FALSE(SiblingDie.isValid());
// Get the children of the compile unit
auto A = CUDie.getFirstChild();
auto B = A.getFirstChild();
auto C = B.getSibling();
auto D = C.getSibling();
auto Null = D.getSibling();
// Verify NULL Die is NULL and has no children or siblings
EXPECT_TRUE(Null.isNULL());
EXPECT_FALSE(Null.getSibling().isValid());
EXPECT_FALSE(Null.getFirstChild().isValid());
// Verify all children of the compile unit DIE are correct.
EXPECT_EQ(A.getTag(), (dwarf::Tag)Tag::A);
EXPECT_EQ(B.getTag(), (dwarf::Tag)Tag::B);
EXPECT_EQ(C.getTag(), (dwarf::Tag)Tag::C);
EXPECT_EQ(D.getTag(), (dwarf::Tag)Tag::D);
// Verify who has children
EXPECT_TRUE(A.hasChildren());
EXPECT_FALSE(B.hasChildren());
EXPECT_TRUE(C.hasChildren());
EXPECT_TRUE(D.hasChildren());
// Make sure the parent of all the children of the compile unit are the
// compile unit.
EXPECT_EQ(A.getParent(), CUDie);
// Make sure the parent of all the children of A are the A.
// B is the first child in A, so we need to verify we can get the previous
// DIE as the parent.
EXPECT_EQ(B.getParent(), A);
// C is the second child in A, so we need to make sure we can backup across
// other DIE (B) at the same level to get the correct parent.
EXPECT_EQ(C.getParent(), A);
// D is the third child of A. We need to verify we can backup across other DIE
// (B and C) including DIE that have children (D) to get the correct parent.
EXPECT_EQ(D.getParent(), A);
// Verify that a DIE with no children returns an invalid DWARFDie.
EXPECT_FALSE(B.getFirstChild().isValid());
// Verify the children of the B DIE
auto C1 = C.getFirstChild();
auto C2 = C1.getSibling();
EXPECT_TRUE(C2.getSibling().isNULL());
// Verify all children of the B DIE correctly valid or invalid.
EXPECT_EQ(C1.getTag(), (dwarf::Tag)Tag::C1);
EXPECT_EQ(C2.getTag(), (dwarf::Tag)Tag::C2);
// Make sure the parent of all the children of the B are the B.
EXPECT_EQ(C1.getParent(), C);
EXPECT_EQ(C2.getParent(), C);
// Make sure iterators work as expected.
EXPECT_THAT(std::vector<DWARFDie>(A.begin(), A.end()),
testing::ElementsAre(B, C, D));
EXPECT_THAT(std::vector<DWARFDie>(A.rbegin(), A.rend()),
testing::ElementsAre(D, C, B));
// Make sure conversion from reverse iterator works as expected.
EXPECT_EQ(A.rbegin().base(), A.end());
EXPECT_EQ(A.rend().base(), A.begin());
// Make sure iterator is bidirectional.
{
auto Begin = A.begin();
auto End = A.end();
auto It = A.begin();
EXPECT_EQ(It, Begin);
EXPECT_EQ(*It, B);
++It;
EXPECT_EQ(*It, C);
++It;
EXPECT_EQ(*It, D);
++It;
EXPECT_EQ(It, End);
--It;
EXPECT_EQ(*It, D);
--It;
EXPECT_EQ(*It, C);
--It;
EXPECT_EQ(*It, B);
EXPECT_EQ(It, Begin);
}
// Make sure reverse iterator is bidirectional.
{
auto Begin = A.rbegin();
auto End = A.rend();
auto It = A.rbegin();
EXPECT_EQ(It, Begin);
EXPECT_EQ(*It, D);
++It;
EXPECT_EQ(*It, C);
++It;
EXPECT_EQ(*It, B);
++It;
EXPECT_EQ(It, End);
--It;
EXPECT_EQ(*It, B);
--It;
EXPECT_EQ(*It, C);
--It;
EXPECT_EQ(*It, D);
EXPECT_EQ(It, Begin);
}
}
TEST(DWARFDebugInfo, TestDWARFDie) {
// Make sure a default constructed DWARFDie doesn't have any parent, sibling
// or child;
DWARFDie DefaultDie;
EXPECT_FALSE(DefaultDie.getParent().isValid());
EXPECT_FALSE(DefaultDie.getFirstChild().isValid());
EXPECT_FALSE(DefaultDie.getSibling().isValid());
}
TEST(DWARFDebugInfo, TestChildIterators) {
Triple Triple = getNormalizedDefaultTargetTriple();
if (!isConfigurationSupported(Triple))
return;
// Test the DWARF APIs related to iterating across the children of a DIE using
// the DWARFDie::iterator class.
uint16_t Version = 4;
auto ExpectedDG = dwarfgen::Generator::create(Triple, Version);
ASSERT_THAT_EXPECTED(ExpectedDG, Succeeded());
dwarfgen::Generator *DG = ExpectedDG.get().get();
dwarfgen::CompileUnit &CU = DG->addCompileUnit();
enum class Tag: uint16_t {
A = dwarf::DW_TAG_lo_user,
B,
};
// Scope to allow us to re-use the same DIE names
{
// Create DWARF tree that looks like:
//
// CU
// A
// B
auto CUDie = CU.getUnitDIE();
CUDie.addChild((dwarf::Tag)Tag::A);
CUDie.addChild((dwarf::Tag)Tag::B);
}
MemoryBufferRef FileBuffer(DG->generate(), "dwarf");
auto Obj = object::ObjectFile::createObjectFile(FileBuffer);
EXPECT_TRUE((bool)Obj);
std::unique_ptr<DWARFContext> DwarfContext = DWARFContext::create(**Obj);
// Verify the number of compile units is correct.
uint32_t NumCUs = DwarfContext->getNumCompileUnits();
EXPECT_EQ(NumCUs, 1u);
DWARFCompileUnit *U =
cast<DWARFCompileUnit>(DwarfContext->getUnitAtIndex(0));
// Get the compile unit DIE is valid.
auto CUDie = U->getUnitDIE(false);
EXPECT_TRUE(CUDie.isValid());
uint32_t Index;
DWARFDie A;
DWARFDie B;
// Verify the compile unit DIE's children.
Index = 0;
for (auto Die : CUDie.children()) {
switch (Index++) {
case 0: A = Die; break;
case 1: B = Die; break;
}
}
EXPECT_EQ(A.getTag(), (dwarf::Tag)Tag::A);
EXPECT_EQ(B.getTag(), (dwarf::Tag)Tag::B);
// Verify that A has no children by verifying that the begin and end contain
// invalid DIEs and also that the iterators are equal.
EXPECT_EQ(A.begin(), A.end());
}
TEST(DWARFDebugInfo, TestChildIteratorsOnInvalidDie) {
// Verify that an invalid DIE has no children.
DWARFDie Invalid;
auto begin = Invalid.begin();
auto end = Invalid.end();
EXPECT_FALSE(begin->isValid());
EXPECT_FALSE(end->isValid());
EXPECT_EQ(begin, end);
}
TEST(DWARFDebugInfo, TestEmptyChildren) {
const char *yamldata = "debug_abbrev:\n"
" - Table:\n"
" - Code: 0x00000001\n"
" Tag: DW_TAG_compile_unit\n"
" Children: DW_CHILDREN_yes\n"
"debug_info:\n"
" - Version: 4\n"
" AddrSize: 8\n"
" Entries:\n"
" - AbbrCode: 0x00000001\n"
" - AbbrCode: 0x00000000\n";
auto ErrOrSections = DWARFYAML::emitDebugSections(StringRef(yamldata));
ASSERT_TRUE((bool)ErrOrSections);
std::unique_ptr<DWARFContext> DwarfContext =
DWARFContext::create(*ErrOrSections, 8);
// Verify the number of compile units is correct.
uint32_t NumCUs = DwarfContext->getNumCompileUnits();
EXPECT_EQ(NumCUs, 1u);
DWARFCompileUnit *U =
cast<DWARFCompileUnit>(DwarfContext->getUnitAtIndex(0));
// Get the compile unit DIE is valid.
auto CUDie = U->getUnitDIE(false);
EXPECT_TRUE(CUDie.isValid());
// Verify that the CU Die that says it has children, but doesn't, actually
// has begin and end iterators that are equal. We want to make sure we don't
// see the Null DIEs during iteration.
EXPECT_EQ(CUDie.begin(), CUDie.end());
}
TEST(DWARFDebugInfo, TestAttributeIterators) {
Triple Triple = getNormalizedDefaultTargetTriple();
if (!isConfigurationSupported(Triple))
return;
// Test the DWARF APIs related to iterating across all attribute values in a
// a DWARFDie.
uint16_t Version = 4;
auto ExpectedDG = dwarfgen::Generator::create(Triple, Version);
ASSERT_THAT_EXPECTED(ExpectedDG, Succeeded());
dwarfgen::Generator *DG = ExpectedDG.get().get();
dwarfgen::CompileUnit &CU = DG->addCompileUnit();
const uint64_t CULowPC = 0x1000;
StringRef CUPath("/tmp/main.c");
// Scope to allow us to re-use the same DIE names
{
auto CUDie = CU.getUnitDIE();
// Encode an attribute value before an attribute with no data.
CUDie.addAttribute(DW_AT_name, DW_FORM_strp, CUPath.data());
// Encode an attribute value with no data in .debug_info/types to ensure
// the iteration works correctly.
CUDie.addAttribute(DW_AT_declaration, DW_FORM_flag_present);
// Encode an attribute value after an attribute with no data.
CUDie.addAttribute(DW_AT_low_pc, DW_FORM_addr, CULowPC);
}
MemoryBufferRef FileBuffer(DG->generate(), "dwarf");
auto Obj = object::ObjectFile::createObjectFile(FileBuffer);
EXPECT_TRUE((bool)Obj);
std::unique_ptr<DWARFContext> DwarfContext = DWARFContext::create(**Obj);
// Verify the number of compile units is correct.
uint32_t NumCUs = DwarfContext->getNumCompileUnits();
EXPECT_EQ(NumCUs, 1u);
DWARFCompileUnit *U =
cast<DWARFCompileUnit>(DwarfContext->getUnitAtIndex(0));
// Get the compile unit DIE is valid.
auto CUDie = U->getUnitDIE(false);
EXPECT_TRUE(CUDie.isValid());
auto R = CUDie.attributes();
auto I = R.begin();
auto E = R.end();
ASSERT_NE(E, I);
EXPECT_EQ(I->Attr, DW_AT_name);
auto ActualCUPath = I->Value.getAsCString();
EXPECT_EQ(CUPath, *ActualCUPath);
ASSERT_NE(E, ++I);
EXPECT_EQ(I->Attr, DW_AT_declaration);
EXPECT_EQ(1ull, *I->Value.getAsUnsignedConstant());
ASSERT_NE(E, ++I);
EXPECT_EQ(I->Attr, DW_AT_low_pc);
EXPECT_EQ(CULowPC, *I->Value.getAsAddress());
EXPECT_EQ(E, ++I);
}
TEST(DWARFDebugInfo, TestFindRecurse) {
Triple Triple = getNormalizedDefaultTargetTriple();
if (!isConfigurationSupported(Triple))
return;
uint16_t Version = 4;
auto ExpectedDG = dwarfgen::Generator::create(Triple, Version);
ASSERT_THAT_EXPECTED(ExpectedDG, Succeeded());
dwarfgen::Generator *DG = ExpectedDG.get().get();
dwarfgen::CompileUnit &CU = DG->addCompileUnit();
StringRef SpecDieName = "spec";
StringRef SpecLinkageName = "spec_linkage";
StringRef AbsDieName = "abs";
// Scope to allow us to re-use the same DIE names
{
auto CUDie = CU.getUnitDIE();
auto FuncSpecDie = CUDie.addChild(DW_TAG_subprogram);
auto FuncAbsDie = CUDie.addChild(DW_TAG_subprogram);
// Put the linkage name in a second abstract origin DIE to ensure we
// recurse through more than just one DIE when looking for attributes.
auto FuncAbsDie2 = CUDie.addChild(DW_TAG_subprogram);
auto FuncDie = CUDie.addChild(DW_TAG_subprogram);
auto VarAbsDie = CUDie.addChild(DW_TAG_variable);
auto VarDie = CUDie.addChild(DW_TAG_variable);
FuncSpecDie.addAttribute(DW_AT_name, DW_FORM_strp, SpecDieName);
FuncAbsDie2.addAttribute(DW_AT_linkage_name, DW_FORM_strp, SpecLinkageName);
FuncAbsDie.addAttribute(DW_AT_specification, DW_FORM_ref4, FuncSpecDie);
FuncAbsDie.addAttribute(DW_AT_abstract_origin, DW_FORM_ref4, FuncAbsDie2);
FuncDie.addAttribute(DW_AT_abstract_origin, DW_FORM_ref4, FuncAbsDie);
VarAbsDie.addAttribute(DW_AT_name, DW_FORM_strp, AbsDieName);
VarDie.addAttribute(DW_AT_abstract_origin, DW_FORM_ref4, VarAbsDie);
}
MemoryBufferRef FileBuffer(DG->generate(), "dwarf");
auto Obj = object::ObjectFile::createObjectFile(FileBuffer);
EXPECT_TRUE((bool)Obj);
std::unique_ptr<DWARFContext> DwarfContext = DWARFContext::create(**Obj);
// Verify the number of compile units is correct.
uint32_t NumCUs = DwarfContext->getNumCompileUnits();
EXPECT_EQ(NumCUs, 1u);
DWARFCompileUnit *U =
cast<DWARFCompileUnit>(DwarfContext->getUnitAtIndex(0));
// Get the compile unit DIE is valid.
auto CUDie = U->getUnitDIE(false);
EXPECT_TRUE(CUDie.isValid());
auto FuncSpecDie = CUDie.getFirstChild();
auto FuncAbsDie = FuncSpecDie.getSibling();
auto FuncAbsDie2 = FuncAbsDie.getSibling();
auto FuncDie = FuncAbsDie2.getSibling();
auto VarAbsDie = FuncDie.getSibling();
auto VarDie = VarAbsDie.getSibling();
// Make sure we can't extract the name from the specification die when using
// DWARFDie::find() since it won't check the DW_AT_specification DIE.
EXPECT_FALSE(FuncDie.find(DW_AT_name));
// Make sure we can extract the name from the specification die when using
// DWARFDie::findRecursively() since it should recurse through the
// DW_AT_specification DIE.
auto NameOpt = FuncDie.findRecursively(DW_AT_name);
EXPECT_TRUE(NameOpt);
// Test the dwarf::toString() helper function.
auto StringOpt = toString(NameOpt);
EXPECT_TRUE(StringOpt);
EXPECT_EQ(SpecDieName, StringOpt.getValueOr(nullptr));
// Test the dwarf::toString() helper function with a default value specified.
EXPECT_EQ(SpecDieName, toString(NameOpt, nullptr));
auto LinkageNameOpt = FuncDie.findRecursively(DW_AT_linkage_name);
EXPECT_EQ(SpecLinkageName, toString(LinkageNameOpt).getValueOr(nullptr));
// Make sure we can't extract the name from the abstract origin die when using
// DWARFDie::find() since it won't check the DW_AT_abstract_origin DIE.
EXPECT_FALSE(VarDie.find(DW_AT_name));
// Make sure we can extract the name from the abstract origin die when using
// DWARFDie::findRecursively() since it should recurse through the
// DW_AT_abstract_origin DIE.
NameOpt = VarDie.findRecursively(DW_AT_name);
EXPECT_TRUE(NameOpt);
// Test the dwarf::toString() helper function.
StringOpt = toString(NameOpt);
EXPECT_TRUE(StringOpt);
EXPECT_EQ(AbsDieName, StringOpt.getValueOr(nullptr));
}
TEST(DWARFDebugInfo, TestDwarfToFunctions) {
// Test all of the dwarf::toXXX functions that take a
// Optional<DWARFFormValue> and extract the values from it.
uint64_t InvalidU64 = 0xBADBADBADBADBADB;
int64_t InvalidS64 = 0xBADBADBADBADBADB;
// First test that we don't get valid values back when using an optional with
// no value.
Optional<DWARFFormValue> FormValOpt1 = DWARFFormValue();
EXPECT_FALSE(toString(FormValOpt1).hasValue());
EXPECT_FALSE(toUnsigned(FormValOpt1).hasValue());
EXPECT_FALSE(toReference(FormValOpt1).hasValue());
EXPECT_FALSE(toSigned(FormValOpt1).hasValue());
EXPECT_FALSE(toAddress(FormValOpt1).hasValue());
EXPECT_FALSE(toSectionOffset(FormValOpt1).hasValue());
EXPECT_FALSE(toBlock(FormValOpt1).hasValue());
EXPECT_EQ(nullptr, toString(FormValOpt1, nullptr));
EXPECT_EQ(InvalidU64, toUnsigned(FormValOpt1, InvalidU64));
EXPECT_EQ(InvalidU64, toReference(FormValOpt1, InvalidU64));
EXPECT_EQ(InvalidU64, toAddress(FormValOpt1, InvalidU64));
EXPECT_EQ(InvalidU64, toSectionOffset(FormValOpt1, InvalidU64));
EXPECT_EQ(InvalidS64, toSigned(FormValOpt1, InvalidS64));
// Test successful and unsuccessful address decoding.
uint64_t Address = 0x100000000ULL;
Optional<DWARFFormValue> FormValOpt2 =
DWARFFormValue::createFromUValue(DW_FORM_addr, Address);
EXPECT_FALSE(toString(FormValOpt2).hasValue());
EXPECT_FALSE(toUnsigned(FormValOpt2).hasValue());
EXPECT_FALSE(toReference(FormValOpt2).hasValue());
EXPECT_FALSE(toSigned(FormValOpt2).hasValue());
EXPECT_TRUE(toAddress(FormValOpt2).hasValue());
EXPECT_FALSE(toSectionOffset(FormValOpt2).hasValue());
EXPECT_FALSE(toBlock(FormValOpt2).hasValue());
EXPECT_EQ(nullptr, toString(FormValOpt2, nullptr));
EXPECT_EQ(InvalidU64, toUnsigned(FormValOpt2, InvalidU64));
EXPECT_EQ(InvalidU64, toReference(FormValOpt2, InvalidU64));
EXPECT_EQ(Address, toAddress(FormValOpt2, InvalidU64));
EXPECT_EQ(InvalidU64, toSectionOffset(FormValOpt2, InvalidU64));
EXPECT_EQ(InvalidS64, toSigned(FormValOpt2, InvalidU64));
// Test successful and unsuccessful unsigned constant decoding.
uint64_t UData8 = 0x1020304050607080ULL;
Optional<DWARFFormValue> FormValOpt3 =
DWARFFormValue::createFromUValue(DW_FORM_udata, UData8);
EXPECT_FALSE(toString(FormValOpt3).hasValue());
EXPECT_TRUE(toUnsigned(FormValOpt3).hasValue());
EXPECT_FALSE(toReference(FormValOpt3).hasValue());
EXPECT_TRUE(toSigned(FormValOpt3).hasValue());
EXPECT_FALSE(toAddress(FormValOpt3).hasValue());
EXPECT_FALSE(toSectionOffset(FormValOpt3).hasValue());
EXPECT_FALSE(toBlock(FormValOpt3).hasValue());
EXPECT_EQ(nullptr, toString(FormValOpt3, nullptr));
EXPECT_EQ(UData8, toUnsigned(FormValOpt3, InvalidU64));
EXPECT_EQ(InvalidU64, toReference(FormValOpt3, InvalidU64));
EXPECT_EQ(InvalidU64, toAddress(FormValOpt3, InvalidU64));
EXPECT_EQ(InvalidU64, toSectionOffset(FormValOpt3, InvalidU64));
EXPECT_EQ((int64_t)UData8, toSigned(FormValOpt3, InvalidU64));
// Test successful and unsuccessful reference decoding.
uint32_t RefData = 0x11223344U;
Optional<DWARFFormValue> FormValOpt4 =
DWARFFormValue::createFromUValue(DW_FORM_ref_addr, RefData);
EXPECT_FALSE(toString(FormValOpt4).hasValue());
EXPECT_FALSE(toUnsigned(FormValOpt4).hasValue());
EXPECT_TRUE(toReference(FormValOpt4).hasValue());
EXPECT_FALSE(toSigned(FormValOpt4).hasValue());
EXPECT_FALSE(toAddress(FormValOpt4).hasValue());
EXPECT_FALSE(toSectionOffset(FormValOpt4).hasValue());
EXPECT_FALSE(toBlock(FormValOpt4).hasValue());
EXPECT_EQ(nullptr, toString(FormValOpt4, nullptr));
EXPECT_EQ(InvalidU64, toUnsigned(FormValOpt4, InvalidU64));
EXPECT_EQ(RefData, toReference(FormValOpt4, InvalidU64));
EXPECT_EQ(InvalidU64, toAddress(FormValOpt4, InvalidU64));
EXPECT_EQ(InvalidU64, toSectionOffset(FormValOpt4, InvalidU64));
EXPECT_EQ(InvalidS64, toSigned(FormValOpt4, InvalidU64));
// Test successful and unsuccessful signed constant decoding.
int64_t SData8 = 0x1020304050607080ULL;
Optional<DWARFFormValue> FormValOpt5 =
DWARFFormValue::createFromSValue(DW_FORM_udata, SData8);
EXPECT_FALSE(toString(FormValOpt5).hasValue());
EXPECT_TRUE(toUnsigned(FormValOpt5).hasValue());
EXPECT_FALSE(toReference(FormValOpt5).hasValue());
EXPECT_TRUE(toSigned(FormValOpt5).hasValue());
EXPECT_FALSE(toAddress(FormValOpt5).hasValue());
EXPECT_FALSE(toSectionOffset(FormValOpt5).hasValue());
EXPECT_FALSE(toBlock(FormValOpt5).hasValue());
EXPECT_EQ(nullptr, toString(FormValOpt5, nullptr));
EXPECT_EQ((uint64_t)SData8, toUnsigned(FormValOpt5, InvalidU64));
EXPECT_EQ(InvalidU64, toReference(FormValOpt5, InvalidU64));
EXPECT_EQ(InvalidU64, toAddress(FormValOpt5, InvalidU64));
EXPECT_EQ(InvalidU64, toSectionOffset(FormValOpt5, InvalidU64));
EXPECT_EQ(SData8, toSigned(FormValOpt5, InvalidU64));
// Test successful and unsuccessful block decoding.
uint8_t Data[] = { 2, 3, 4 };
ArrayRef<uint8_t> Array(Data);
Optional<DWARFFormValue> FormValOpt6 =
DWARFFormValue::createFromBlockValue(DW_FORM_block1, Array);
EXPECT_FALSE(toString(FormValOpt6).hasValue());
EXPECT_FALSE(toUnsigned(FormValOpt6).hasValue());
EXPECT_FALSE(toReference(FormValOpt6).hasValue());
EXPECT_FALSE(toSigned(FormValOpt6).hasValue());
EXPECT_FALSE(toAddress(FormValOpt6).hasValue());
EXPECT_FALSE(toSectionOffset(FormValOpt6).hasValue());
auto BlockOpt = toBlock(FormValOpt6);
EXPECT_TRUE(BlockOpt.hasValue());
EXPECT_EQ(*BlockOpt, Array);
EXPECT_EQ(nullptr, toString(FormValOpt6, nullptr));
EXPECT_EQ(InvalidU64, toUnsigned(FormValOpt6, InvalidU64));
EXPECT_EQ(InvalidU64, toReference(FormValOpt6, InvalidU64));
EXPECT_EQ(InvalidU64, toAddress(FormValOpt6, InvalidU64));
EXPECT_EQ(InvalidU64, toSectionOffset(FormValOpt6, InvalidU64));
EXPECT_EQ(InvalidS64, toSigned(FormValOpt6, InvalidU64));
// Test
}
TEST(DWARFDebugInfo, TestFindAttrs) {
Triple Triple = getNormalizedDefaultTargetTriple();
if (!isConfigurationSupported(Triple))
return;
// Test the DWARFDie::find() and DWARFDie::findRecursively() that take an
// ArrayRef<dwarf::Attribute> value to make sure they work correctly.
uint16_t Version = 4;
auto ExpectedDG = dwarfgen::Generator::create(Triple, Version);
ASSERT_THAT_EXPECTED(ExpectedDG, Succeeded());
dwarfgen::Generator *DG = ExpectedDG.get().get();
dwarfgen::CompileUnit &CU = DG->addCompileUnit();
StringRef DieMangled("_Z3fooi");
// Scope to allow us to re-use the same DIE names
{
auto CUDie = CU.getUnitDIE();
auto FuncSpecDie = CUDie.addChild(DW_TAG_subprogram);
auto FuncDie = CUDie.addChild(DW_TAG_subprogram);
FuncSpecDie.addAttribute(DW_AT_MIPS_linkage_name, DW_FORM_strp, DieMangled);
FuncDie.addAttribute(DW_AT_specification, DW_FORM_ref4, FuncSpecDie);
}
MemoryBufferRef FileBuffer(DG->generate(), "dwarf");
auto Obj = object::ObjectFile::createObjectFile(FileBuffer);
EXPECT_TRUE((bool)Obj);
std::unique_ptr<DWARFContext> DwarfContext = DWARFContext::create(**Obj);
// Verify the number of compile units is correct.
uint32_t NumCUs = DwarfContext->getNumCompileUnits();
EXPECT_EQ(NumCUs, 1u);
DWARFCompileUnit *U =
cast<DWARFCompileUnit>(DwarfContext->getUnitAtIndex(0));
// Get the compile unit DIE is valid.
auto CUDie = U->getUnitDIE(false);
EXPECT_TRUE(CUDie.isValid());
auto FuncSpecDie = CUDie.getFirstChild();
auto FuncDie = FuncSpecDie.getSibling();
// Make sure that passing in an empty attribute list behave correctly.
EXPECT_FALSE(FuncDie.find(ArrayRef<dwarf::Attribute>()).hasValue());
// Make sure that passing in a list of attribute that are not contained
// in the DIE returns nothing.
EXPECT_FALSE(FuncDie.find({DW_AT_low_pc, DW_AT_entry_pc}).hasValue());
const dwarf::Attribute Attrs[] = {DW_AT_linkage_name,
DW_AT_MIPS_linkage_name};
// Make sure we can't extract the linkage name attributes when using
// DWARFDie::find() since it won't check the DW_AT_specification DIE.
EXPECT_FALSE(FuncDie.find(Attrs).hasValue());
// Make sure we can extract the name from the specification die when using
// DWARFDie::findRecursively() since it should recurse through the
// DW_AT_specification DIE.
auto NameOpt = FuncDie.findRecursively(Attrs);
EXPECT_TRUE(NameOpt.hasValue());
EXPECT_EQ(DieMangled, toString(NameOpt, ""));
}
TEST(DWARFDebugInfo, TestImplicitConstAbbrevs) {
Triple Triple = getNormalizedDefaultTargetTriple();
if (!isConfigurationSupported(Triple))
return;
uint16_t Version = 5;
auto ExpectedDG = dwarfgen::Generator::create(Triple, Version);
ASSERT_THAT_EXPECTED(ExpectedDG, Succeeded());
dwarfgen::Generator *DG = ExpectedDG.get().get();
dwarfgen::CompileUnit &CU = DG->addCompileUnit();
dwarfgen::DIE CUDie = CU.getUnitDIE();
const dwarf::Attribute Attr = DW_AT_lo_user;
const int64_t Val1 = 42;
const int64_t Val2 = 43;
auto FirstVal1DIE = CUDie.addChild(DW_TAG_class_type);
FirstVal1DIE.addAttribute(Attr, DW_FORM_implicit_const, Val1);
auto SecondVal1DIE = CUDie.addChild(DW_TAG_class_type);
SecondVal1DIE.addAttribute(Attr, DW_FORM_implicit_const, Val1);
auto Val2DIE = CUDie.addChild(DW_TAG_class_type);
Val2DIE.addAttribute(Attr, DW_FORM_implicit_const, Val2);
MemoryBufferRef FileBuffer(DG->generate(), "dwarf");
auto Obj = object::ObjectFile::createObjectFile(FileBuffer);
EXPECT_TRUE((bool)Obj);
std::unique_ptr<DWARFContext> DwarfContext = DWARFContext::create(**Obj);
DWARFCompileUnit *U =
cast<DWARFCompileUnit>(DwarfContext->getUnitAtIndex(0));
EXPECT_TRUE((bool)U);
const auto *Abbrevs = U->getAbbreviations();
EXPECT_TRUE((bool)Abbrevs);
// Let's find implicit_const abbrevs and verify,
// that there are exactly two of them and both of them
// can be dumped correctly.
typedef decltype(Abbrevs->begin()) AbbrevIt;
AbbrevIt Val1Abbrev = Abbrevs->end();
AbbrevIt Val2Abbrev = Abbrevs->end();
for(auto it = Abbrevs->begin(); it != Abbrevs->end(); ++it) {
if (it->getNumAttributes() == 0)
continue; // root abbrev for DW_TAG_compile_unit
auto A = it->getAttrByIndex(0);
EXPECT_EQ(A, Attr);
auto FormValue = it->getAttributeValue(/* offset */ 0, A, *U);
EXPECT_TRUE((bool)FormValue);
EXPECT_EQ(FormValue->getForm(), dwarf::DW_FORM_implicit_const);
const auto V = FormValue->getAsSignedConstant();
EXPECT_TRUE((bool)V);
auto VerifyAbbrevDump = [&V](AbbrevIt it) {
std::string S;
llvm::raw_string_ostream OS(S);
it->dump(OS);
auto FormPos = OS.str().find("DW_FORM_implicit_const");
EXPECT_NE(FormPos, std::string::npos);
auto ValPos = S.find_first_of("-0123456789", FormPos);
EXPECT_NE(ValPos, std::string::npos);
int64_t Val = std::atoll(S.substr(ValPos).c_str());
EXPECT_EQ(Val, *V);
};
switch(*V) {
case Val1:
EXPECT_EQ(Val1Abbrev, Abbrevs->end());
Val1Abbrev = it;
VerifyAbbrevDump(it);
break;
case Val2:
EXPECT_EQ(Val2Abbrev, Abbrevs->end());
Val2Abbrev = it;
VerifyAbbrevDump(it);
break;
default:
FAIL() << "Unexpected attribute value: " << *V;
}
}
// Now let's make sure that two Val1-DIEs refer to the same abbrev,
// and Val2-DIE refers to another one.
auto DieDG = U->getUnitDIE(false);
auto it = DieDG.begin();
std::multimap<int64_t, decltype(it->getAbbreviationDeclarationPtr())> DIEs;
const DWARFAbbreviationDeclaration *AbbrevPtrVal1 = nullptr;
const DWARFAbbreviationDeclaration *AbbrevPtrVal2 = nullptr;
for (; it != DieDG.end(); ++it) {
const auto *AbbrevPtr = it->getAbbreviationDeclarationPtr();
EXPECT_TRUE((bool)AbbrevPtr);
auto FormValue = it->find(Attr);
EXPECT_TRUE((bool)FormValue);
const auto V = FormValue->getAsSignedConstant();
EXPECT_TRUE((bool)V);
switch(*V) {
case Val1:
AbbrevPtrVal1 = AbbrevPtr;
break;
case Val2:
AbbrevPtrVal2 = AbbrevPtr;
break;
default:
FAIL() << "Unexpected attribute value: " << *V;
}
DIEs.insert(std::make_pair(*V, AbbrevPtr));
}
EXPECT_EQ(DIEs.count(Val1), 2u);
EXPECT_EQ(DIEs.count(Val2), 1u);
auto Val1Range = DIEs.equal_range(Val1);
for (auto it = Val1Range.first; it != Val1Range.second; ++it)
EXPECT_EQ(it->second, AbbrevPtrVal1);
EXPECT_EQ(DIEs.find(Val2)->second, AbbrevPtrVal2);
}
void VerifyWarning(DWARFContext &DwarfContext, StringRef Error) {
SmallString<1024> Str;
raw_svector_ostream Strm(Str);
EXPECT_TRUE(DwarfContext.verify(Strm));
EXPECT_TRUE(Str.str().contains(Error));
}
void VerifyError(DWARFContext &DwarfContext, StringRef Error) {
SmallString<1024> Str;
raw_svector_ostream Strm(Str);
EXPECT_FALSE(DwarfContext.verify(Strm));
EXPECT_TRUE(Str.str().contains(Error));
}
void VerifySuccess(DWARFContext &DwarfContext) {
SmallString<1024> Str;
raw_svector_ostream Strm(Str);
EXPECT_TRUE(DwarfContext.verify(Strm));
}
TEST(DWARFDebugInfo, TestDwarfVerifyInvalidCURef) {
// Create a single compile unit with a single function that has a DW_AT_type
// that is CU relative. The CU offset is not valid because it is larger than
// the compile unit itself.
const char *yamldata = R"(
debug_str:
- ''
- /tmp/main.c
- main
debug_abbrev:
- Table:
- Code: 0x00000001
Tag: DW_TAG_compile_unit
Children: DW_CHILDREN_yes
Attributes:
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Code: 0x00000002
Tag: DW_TAG_subprogram
Children: DW_CHILDREN_no
Attributes:
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Attribute: DW_AT_type
Form: DW_FORM_ref4
debug_info:
- Version: 4
AddrSize: 8
Entries:
- AbbrCode: 0x00000001
Values:
- Value: 0x0000000000000001
- AbbrCode: 0x00000002
Values:
- Value: 0x000000000000000D
- Value: 0x0000000000001234
- AbbrCode: 0x00000000
)";
auto ErrOrSections = DWARFYAML::emitDebugSections(StringRef(yamldata));
ASSERT_TRUE((bool)ErrOrSections);
std::unique_ptr<DWARFContext> DwarfContext =
DWARFContext::create(*ErrOrSections, 8);
VerifyError(*DwarfContext, "error: DW_FORM_ref4 CU offset 0x00001234 is "
"invalid (must be less than CU size of "
"0x0000001a):");
}
TEST(DWARFDebugInfo, TestDwarfVerifyInvalidRefAddr) {
// Create a single compile unit with a single function that has an invalid
// DW_AT_type with an invalid .debug_info offset in its DW_FORM_ref_addr.
const char *yamldata = R"(
debug_str:
- ''
- /tmp/main.c
- main
debug_abbrev:
- Table:
- Code: 0x00000001
Tag: DW_TAG_compile_unit
Children: DW_CHILDREN_yes
Attributes:
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Code: 0x00000002
Tag: DW_TAG_subprogram
Children: DW_CHILDREN_no
Attributes:
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Attribute: DW_AT_type
Form: DW_FORM_ref_addr
debug_info:
- Version: 4
AddrSize: 8
Entries:
- AbbrCode: 0x00000001
Values:
- Value: 0x0000000000000001
- AbbrCode: 0x00000002
Values:
- Value: 0x000000000000000D
- Value: 0x0000000000001234
- AbbrCode: 0x00000000
)";
auto ErrOrSections = DWARFYAML::emitDebugSections(StringRef(yamldata));
ASSERT_TRUE((bool)ErrOrSections);
std::unique_ptr<DWARFContext> DwarfContext =
DWARFContext::create(*ErrOrSections, 8);
VerifyError(*DwarfContext,
"error: DW_FORM_ref_addr offset beyond .debug_info bounds:");
}
TEST(DWARFDebugInfo, TestDwarfVerifyInvalidRanges) {
// Create a single compile unit with a DW_AT_ranges whose section offset
// isn't valid.
const char *yamldata = R"(
debug_str:
- ''
- /tmp/main.c
debug_abbrev:
- Table:
- Code: 0x00000001
Tag: DW_TAG_compile_unit
Children: DW_CHILDREN_no
Attributes:
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Attribute: DW_AT_ranges
Form: DW_FORM_sec_offset
debug_info:
- Version: 4
AddrSize: 8
Entries:
- AbbrCode: 0x00000001
Values:
- Value: 0x0000000000000001
- Value: 0x0000000000001000
)";
auto ErrOrSections = DWARFYAML::emitDebugSections(StringRef(yamldata));
ASSERT_TRUE((bool)ErrOrSections);
std::unique_ptr<DWARFContext> DwarfContext =
DWARFContext::create(*ErrOrSections, 8);
VerifyError(
*DwarfContext,
"error: DW_AT_ranges offset is beyond .debug_ranges bounds: 0x00001000");
}
TEST(DWARFDebugInfo, TestDwarfVerifyInvalidRnglists) {
// Create a single compile unit with a DW_AT_ranges whose section offset
// isn't valid.
const char *yamldata = R"(
debug_str:
- ''
- /tmp/main.c
debug_abbrev:
- Table:
- Code: 0x00000001
Tag: DW_TAG_compile_unit
Children: DW_CHILDREN_no
Attributes:
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Attribute: DW_AT_ranges
Form: DW_FORM_sec_offset
debug_info:
- Version: 5
UnitType: DW_UT_compile
AddrSize: 8
Entries:
- AbbrCode: 0x00000001
Values:
- Value: 0x0000000000000001
- Value: 0x0000000000001000
)";
auto ErrOrSections = DWARFYAML::emitDebugSections(StringRef(yamldata));
ASSERT_TRUE((bool)ErrOrSections);
std::unique_ptr<DWARFContext> DwarfContext =
DWARFContext::create(*ErrOrSections, 8);
VerifyError(*DwarfContext, "error: DW_AT_ranges offset is beyond "
".debug_rnglists bounds: 0x00001000");
}
TEST(DWARFDebugInfo, TestDwarfVerifyInvalidStmtList) {
// Create a single compile unit with a DW_AT_stmt_list whose section offset
// isn't valid.
const char *yamldata = R"(
debug_str:
- ''
- /tmp/main.c
debug_abbrev:
- Table:
- Code: 0x00000001
Tag: DW_TAG_compile_unit
Children: DW_CHILDREN_no
Attributes:
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Attribute: DW_AT_stmt_list
Form: DW_FORM_sec_offset
debug_info:
- Version: 4
AddrSize: 8
Entries:
- AbbrCode: 0x00000001
Values:
- Value: 0x0000000000000001
- Value: 0x0000000000001000
)";
auto ErrOrSections = DWARFYAML::emitDebugSections(StringRef(yamldata));
ASSERT_TRUE((bool)ErrOrSections);
std::unique_ptr<DWARFContext> DwarfContext =
DWARFContext::create(*ErrOrSections, 8);
VerifyError(
*DwarfContext,
"error: DW_AT_stmt_list offset is beyond .debug_line bounds: 0x00001000");
}
TEST(DWARFDebugInfo, TestDwarfVerifyInvalidStrp) {
// Create a single compile unit with a single function that has an invalid
// DW_FORM_strp for the DW_AT_name.
const char *yamldata = R"(
debug_str:
- ''
debug_abbrev:
- Table:
- Code: 0x00000001
Tag: DW_TAG_compile_unit
Children: DW_CHILDREN_no
Attributes:
- Attribute: DW_AT_name
Form: DW_FORM_strp
debug_info:
- Version: 4
AddrSize: 8
Entries:
- AbbrCode: 0x00000001
Values:
- Value: 0x0000000000001234
)";
auto ErrOrSections = DWARFYAML::emitDebugSections(StringRef(yamldata));
ASSERT_TRUE((bool)ErrOrSections);
std::unique_ptr<DWARFContext> DwarfContext =
DWARFContext::create(*ErrOrSections, 8);
VerifyError(*DwarfContext,
"error: DW_FORM_strp offset beyond .debug_str bounds:");
}
TEST(DWARFDebugInfo, TestDwarfVerifyInvalidRefAddrBetween) {
// Create a single compile unit with a single function that has a DW_AT_type
// with a valid .debug_info offset, but the offset is between two DIEs.
const char *yamldata = R"(
debug_str:
- ''
- /tmp/main.c
- main
debug_abbrev:
- Table:
- Code: 0x00000001
Tag: DW_TAG_compile_unit
Children: DW_CHILDREN_yes
Attributes:
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Code: 0x00000002
Tag: DW_TAG_subprogram
Children: DW_CHILDREN_no
Attributes:
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Attribute: DW_AT_type
Form: DW_FORM_ref_addr
debug_info:
- Version: 4
AddrSize: 8
Entries:
- AbbrCode: 0x00000001
Values:
- Value: 0x0000000000000001
- AbbrCode: 0x00000002
Values:
- Value: 0x000000000000000D
- Value: 0x0000000000000011
- AbbrCode: 0x00000000
)";
auto ErrOrSections = DWARFYAML::emitDebugSections(StringRef(yamldata));
ASSERT_TRUE((bool)ErrOrSections);
std::unique_ptr<DWARFContext> DwarfContext =
DWARFContext::create(*ErrOrSections, 8);
VerifyError(
*DwarfContext,
"error: invalid DIE reference 0x00000011. Offset is in between DIEs:");
}
TEST(DWARFDebugInfo, TestDwarfVerifyInvalidLineSequence) {
// Create a single compile unit whose line table has a sequence in it where
// the address decreases.
StringRef yamldata = R"(
debug_str:
- ''
- /tmp/main.c
debug_abbrev:
- Table:
- Code: 0x00000001
Tag: DW_TAG_compile_unit
Children: DW_CHILDREN_no
Attributes:
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Attribute: DW_AT_stmt_list
Form: DW_FORM_sec_offset
debug_info:
- Version: 4
AddrSize: 8
Entries:
- AbbrCode: 0x00000001
Values:
- Value: 0x0000000000000001
- Value: 0x0000000000000000
debug_line:
- Version: 2
MinInstLength: 1
DefaultIsStmt: 1
LineBase: 251
LineRange: 14
OpcodeBase: 13
StandardOpcodeLengths: [ 0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1 ]
IncludeDirs:
- /tmp
Files:
- Name: main.c
DirIdx: 1
ModTime: 0
Length: 0
Opcodes:
- Opcode: DW_LNS_extended_op
ExtLen: 9
SubOpcode: DW_LNE_set_address
Data: 4112
- Opcode: DW_LNS_advance_line
SData: 9
Data: 4112
- Opcode: DW_LNS_copy
Data: 4112
- Opcode: DW_LNS_advance_pc
Data: 18446744073709551600
- Opcode: DW_LNS_extended_op
ExtLen: 1
SubOpcode: DW_LNE_end_sequence
Data: 18446744073709551600
)";
auto ErrOrSections = DWARFYAML::emitDebugSections(yamldata);
ASSERT_TRUE((bool)ErrOrSections);
std::unique_ptr<DWARFContext> DwarfContext =
DWARFContext::create(*ErrOrSections, 8);
VerifyError(*DwarfContext, "error: .debug_line[0x00000000] row[1] decreases "
"in address from previous row:");
}
TEST(DWARFDebugInfo, TestDwarfVerifyInvalidLineFileIndex) {
// Create a single compile unit whose line table has a line table row with
// an invalid file index.
StringRef yamldata = R"(
debug_str:
- ''
- /tmp/main.c
debug_abbrev:
- Table:
- Code: 0x00000001
Tag: DW_TAG_compile_unit
Children: DW_CHILDREN_no
Attributes:
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Attribute: DW_AT_stmt_list
Form: DW_FORM_sec_offset
debug_info:
- Version: 4
AddrSize: 8
Entries:
- AbbrCode: 0x00000001
Values:
- Value: 0x0000000000000001
- Value: 0x0000000000000000
debug_line:
- Version: 2
MinInstLength: 1
DefaultIsStmt: 1
LineBase: 251
LineRange: 14
OpcodeBase: 13
StandardOpcodeLengths: [ 0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1 ]
IncludeDirs:
- /tmp
Files:
- Name: main.c
DirIdx: 1
ModTime: 0
Length: 0
Opcodes:
- Opcode: DW_LNS_extended_op
ExtLen: 9
SubOpcode: DW_LNE_set_address
Data: 4096
- Opcode: DW_LNS_advance_line
SData: 9
Data: 4096
- Opcode: DW_LNS_copy
Data: 4096
- Opcode: DW_LNS_advance_pc
Data: 16
- Opcode: DW_LNS_set_file
Data: 5
- Opcode: DW_LNS_extended_op
ExtLen: 1
SubOpcode: DW_LNE_end_sequence
Data: 5
)";
auto ErrOrSections = DWARFYAML::emitDebugSections(yamldata);
ASSERT_TRUE((bool)ErrOrSections);
std::unique_ptr<DWARFContext> DwarfContext =
DWARFContext::create(*ErrOrSections, 8);
VerifyError(*DwarfContext, "error: .debug_line[0x00000000][1] has invalid "
"file index 5 (valid values are [1,1]):");
}
TEST(DWARFDebugInfo, TestDwarfVerifyInvalidLineTablePorlogueDirIndex) {
// Create a single compile unit whose line table has a prologue with an
// invalid dir index.
StringRef yamldata = R"(
debug_str:
- ''
- /tmp/main.c
debug_abbrev:
- Table:
- Code: 0x00000001
Tag: DW_TAG_compile_unit
Children: DW_CHILDREN_no
Attributes:
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Attribute: DW_AT_stmt_list
Form: DW_FORM_sec_offset
debug_info:
- Version: 4
AddrSize: 8
Entries:
- AbbrCode: 0x00000001
Values:
- Value: 0x0000000000000001
- Value: 0x0000000000000000
debug_line:
- Version: 2
MinInstLength: 1
DefaultIsStmt: 1
LineBase: 251
LineRange: 14
OpcodeBase: 13
StandardOpcodeLengths: [ 0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1 ]
IncludeDirs:
- /tmp
Files:
- Name: main.c
DirIdx: 2
ModTime: 0
Length: 0
Opcodes:
- Opcode: DW_LNS_extended_op
ExtLen: 9
SubOpcode: DW_LNE_set_address
Data: 4096
- Opcode: DW_LNS_advance_line
SData: 9
Data: 4096
- Opcode: DW_LNS_copy
Data: 4096
- Opcode: DW_LNS_advance_pc
Data: 16
- Opcode: DW_LNS_set_file
Data: 1
- Opcode: DW_LNS_extended_op
ExtLen: 1
SubOpcode: DW_LNE_end_sequence
Data: 1
)";
auto ErrOrSections = DWARFYAML::emitDebugSections(yamldata);
ASSERT_TRUE((bool)ErrOrSections);
std::unique_ptr<DWARFContext> DwarfContext =
DWARFContext::create(*ErrOrSections, 8);
VerifyError(*DwarfContext,
"error: .debug_line[0x00000000].prologue."
"file_names[1].dir_idx contains an invalid index: 2");
}
TEST(DWARFDebugInfo, TestDwarfVerifyDuplicateFileWarning) {
// Create a single compile unit whose line table has a prologue with an
// invalid dir index.
StringRef yamldata = R"(
debug_str:
- ''
- /tmp/main.c
debug_abbrev:
- Table:
- Code: 0x00000001
Tag: DW_TAG_compile_unit
Children: DW_CHILDREN_no
Attributes:
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Attribute: DW_AT_stmt_list
Form: DW_FORM_sec_offset
debug_info:
- Version: 4
AddrSize: 8
Entries:
- AbbrCode: 0x00000001
Values:
- Value: 0x0000000000000001
- Value: 0x0000000000000000
debug_line:
- Version: 2
MinInstLength: 1
DefaultIsStmt: 1
LineBase: 251
LineRange: 14
OpcodeBase: 13
StandardOpcodeLengths: [ 0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1 ]
IncludeDirs:
- /tmp
Files:
- Name: main.c
DirIdx: 1
ModTime: 0
Length: 0
- Name: main.c
DirIdx: 1
ModTime: 0
Length: 0
Opcodes:
- Opcode: DW_LNS_extended_op
ExtLen: 9
SubOpcode: DW_LNE_set_address
Data: 4096
- Opcode: DW_LNS_advance_line
SData: 9
Data: 4096
- Opcode: DW_LNS_copy
Data: 4096
- Opcode: DW_LNS_advance_pc
Data: 16
- Opcode: DW_LNS_set_file
Data: 1
- Opcode: DW_LNS_extended_op
ExtLen: 1
SubOpcode: DW_LNE_end_sequence
Data: 2
)";
auto ErrOrSections = DWARFYAML::emitDebugSections(yamldata);
ASSERT_TRUE((bool)ErrOrSections);
std::unique_ptr<DWARFContext> DwarfContext =
DWARFContext::create(*ErrOrSections, 8);
VerifyWarning(*DwarfContext,
"warning: .debug_line[0x00000000].prologue.file_names[2] is "
"a duplicate of file_names[1]");
}
TEST(DWARFDebugInfo, TestDwarfVerifyCUDontShareLineTable) {
// Create a two compile units where both compile units share the same
// DW_AT_stmt_list value and verify we report the error correctly.
StringRef yamldata = R"(
debug_str:
- ''
- /tmp/main.c
- /tmp/foo.c
debug_abbrev:
- Table:
- Code: 0x00000001
Tag: DW_TAG_compile_unit
Children: DW_CHILDREN_no
Attributes:
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Attribute: DW_AT_stmt_list
Form: DW_FORM_sec_offset
debug_info:
- Version: 4
AddrSize: 8
Entries:
- AbbrCode: 0x00000001
Values:
- Value: 0x0000000000000001
- Value: 0x0000000000000000
- Length: 16
Version: 4
AbbrevTableID: 0
AddrSize: 8
Entries:
- AbbrCode: 0x00000001
Values:
- Value: 0x000000000000000D
- Value: 0x0000000000000000
debug_line:
- Version: 2
MinInstLength: 1
DefaultIsStmt: 1
LineBase: 251
LineRange: 14
OpcodeBase: 13
StandardOpcodeLengths: [ 0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1 ]
IncludeDirs:
- /tmp
Files:
- Name: main.c
DirIdx: 1
ModTime: 0
Length: 0
Opcodes:
- Opcode: DW_LNS_extended_op
ExtLen: 9
SubOpcode: DW_LNE_set_address
Data: 4096
- Opcode: DW_LNS_advance_line
SData: 9
Data: 4096
- Opcode: DW_LNS_copy
Data: 4096
- Opcode: DW_LNS_advance_pc
Data: 256
- Opcode: DW_LNS_extended_op
ExtLen: 1
SubOpcode: DW_LNE_end_sequence
Data: 256
)";
auto ErrOrSections = DWARFYAML::emitDebugSections(yamldata);
ASSERT_TRUE((bool)ErrOrSections);
std::unique_ptr<DWARFContext> DwarfContext =
DWARFContext::create(*ErrOrSections, 8);
VerifyError(*DwarfContext,
"error: two compile unit DIEs, 0x0000000b and "
"0x0000001f, have the same DW_AT_stmt_list section "
"offset:");
}
TEST(DWARFDebugInfo, TestErrorReporting) {
Triple Triple("x86_64-pc-linux");
if (!isConfigurationSupported(Triple))
return;
auto ExpectedDG = dwarfgen::Generator::create(Triple, 4 /*DwarfVersion*/);
ASSERT_THAT_EXPECTED(ExpectedDG, Succeeded());
dwarfgen::Generator *DG = ExpectedDG.get().get();
AsmPrinter *AP = DG->getAsmPrinter();
MCContext *MC = DG->getMCContext();
// Emit two compressed sections with broken headers.
AP->OutStreamer->SwitchSection(
MC->getELFSection(".zdebug_foo", 0 /*Type*/, 0 /*Flags*/));
AP->OutStreamer->emitBytes("0");
AP->OutStreamer->SwitchSection(
MC->getELFSection(".zdebug_bar", 0 /*Type*/, 0 /*Flags*/));
AP->OutStreamer->emitBytes("0");
MemoryBufferRef FileBuffer(DG->generate(), "dwarf");
auto Obj = object::ObjectFile::createObjectFile(FileBuffer);
EXPECT_TRUE((bool)Obj);
// DWARFContext parses whole file and finds the two errors we expect.
int Errors = 0;
std::unique_ptr<DWARFContext> Ctx1 =
DWARFContext::create(**Obj, nullptr, "", [&](Error E) {
++Errors;
consumeError(std::move(E));
});
EXPECT_TRUE(Errors == 2);
}
TEST(DWARFDebugInfo, TestDwarfVerifyCURangesIncomplete) {
// Create a single compile unit with a single function. The compile
// unit has a DW_AT_ranges attribute that doesn't fully contain the
// address range of the function. The verification should fail due to
// the CU ranges not containing all of the address ranges of all of the
// functions.
StringRef yamldata = R"(
debug_str:
- ''
- /tmp/main.c
debug_abbrev:
- Table:
- Code: 0x00000001
Tag: DW_TAG_compile_unit
Children: DW_CHILDREN_yes
Attributes:
- Attribute: DW_AT_low_pc
Form: DW_FORM_addr
- Attribute: DW_AT_high_pc
Form: DW_FORM_addr
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Code: 0x00000002
Tag: DW_TAG_subprogram
Children: DW_CHILDREN_no
Attributes:
- Attribute: DW_AT_low_pc
Form: DW_FORM_addr
- Attribute: DW_AT_high_pc
Form: DW_FORM_addr
debug_info:
- Version: 4
AddrSize: 8
Entries:
- AbbrCode: 0x00000001
Values:
- Value: 0x0000000000001000
- Value: 0x0000000000001500
- Value: 0x0000000000000001
- AbbrCode: 0x00000002
Values:
- Value: 0x0000000000001000
- Value: 0x0000000000002000
- AbbrCode: 0x00000000
)";
auto ErrOrSections = DWARFYAML::emitDebugSections(yamldata);
ASSERT_TRUE((bool)ErrOrSections);
std::unique_ptr<DWARFContext> DwarfContext =
DWARFContext::create(*ErrOrSections, 8);
VerifyError(*DwarfContext, "error: DIE address ranges are not "
"contained in its parent's ranges:");
}
TEST(DWARFDebugInfo, TestDwarfVerifyLexicalBlockRanges) {
// Create a single compile unit with a single function that has a lexical
// block whose address range is not contained in the function address range.
StringRef yamldata = R"(
debug_str:
- ''
- /tmp/main.c
- main
debug_abbrev:
- Table:
- Code: 0x00000001
Tag: DW_TAG_compile_unit
Children: DW_CHILDREN_yes
Attributes:
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Code: 0x00000002
Tag: DW_TAG_subprogram
Children: DW_CHILDREN_yes
Attributes:
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Attribute: DW_AT_low_pc
Form: DW_FORM_addr
- Attribute: DW_AT_high_pc
Form: DW_FORM_addr
- Code: 0x00000003
Tag: DW_TAG_lexical_block
Children: DW_CHILDREN_no
Attributes:
- Attribute: DW_AT_low_pc
Form: DW_FORM_addr
- Attribute: DW_AT_high_pc
Form: DW_FORM_addr
debug_info:
- Version: 4
AddrSize: 8
Entries:
- AbbrCode: 0x00000001
Values:
- Value: 0x0000000000000001
- AbbrCode: 0x00000002
Values:
- Value: 0x000000000000000D
- Value: 0x0000000000001000
- Value: 0x0000000000002000
- AbbrCode: 0x00000003
Values:
- Value: 0x0000000000001000
- Value: 0x0000000000002001
- AbbrCode: 0x00000000
- AbbrCode: 0x00000000
)";
auto ErrOrSections = DWARFYAML::emitDebugSections(yamldata);
ASSERT_TRUE((bool)ErrOrSections);
std::unique_ptr<DWARFContext> DwarfContext =
DWARFContext::create(*ErrOrSections, 8);
VerifyError(*DwarfContext, "error: DIE address ranges are not "
"contained in its parent's ranges:");
}
TEST(DWARFDebugInfo, TestDwarfVerifyOverlappingFunctionRanges) {
// Create a single compile unit with a two functions that have overlapping
// address ranges.
StringRef yamldata = R"(
debug_str:
- ''
- /tmp/main.c
- main
- foo
debug_abbrev:
- Table:
- Code: 0x00000001
Tag: DW_TAG_compile_unit
Children: DW_CHILDREN_yes
Attributes:
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Code: 0x00000002
Tag: DW_TAG_subprogram
Children: DW_CHILDREN_no
Attributes:
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Attribute: DW_AT_low_pc
Form: DW_FORM_addr
- Attribute: DW_AT_high_pc
Form: DW_FORM_addr
debug_info:
- Version: 4
AddrSize: 8
Entries:
- AbbrCode: 0x00000001
Values:
- Value: 0x0000000000000001
- AbbrCode: 0x00000002
Values:
- Value: 0x000000000000000D
- Value: 0x0000000000001000
- Value: 0x0000000000002000
- AbbrCode: 0x00000002
Values:
- Value: 0x0000000000000012
- Value: 0x0000000000001FFF
- Value: 0x0000000000002000
- AbbrCode: 0x00000000
)";
auto ErrOrSections = DWARFYAML::emitDebugSections(yamldata);
ASSERT_TRUE((bool)ErrOrSections);
std::unique_ptr<DWARFContext> DwarfContext =
DWARFContext::create(*ErrOrSections, 8);
VerifyError(*DwarfContext, "error: DIEs have overlapping address ranges:");
}
TEST(DWARFDebugInfo, TestDwarfVerifyOverlappingLexicalBlockRanges) {
// Create a single compile unit with a one function that has two lexical
// blocks with overlapping address ranges.
StringRef yamldata = R"(
debug_str:
- ''
- /tmp/main.c
- main
debug_abbrev:
- Table:
- Code: 0x00000001
Tag: DW_TAG_compile_unit
Children: DW_CHILDREN_yes
Attributes:
- Attribute: DW_AT_low_pc
Form: DW_FORM_addr
- Attribute: DW_AT_high_pc
Form: DW_FORM_addr
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Code: 0x00000002
Tag: DW_TAG_subprogram
Children: DW_CHILDREN_yes
Attributes:
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Attribute: DW_AT_low_pc
Form: DW_FORM_addr
- Attribute: DW_AT_high_pc
Form: DW_FORM_addr
- Code: 0x00000003
Tag: DW_TAG_lexical_block
Children: DW_CHILDREN_no
Attributes:
- Attribute: DW_AT_low_pc
Form: DW_FORM_addr
- Attribute: DW_AT_high_pc
Form: DW_FORM_addr
debug_info:
- Version: 4
AddrSize: 8
Entries:
- AbbrCode: 0x00000001
Values:
- Value: 0x0000000000001000
- Value: 0x0000000000002000
- Value: 0x0000000000000001
- AbbrCode: 0x00000002
Values:
- Value: 0x000000000000000D
- Value: 0x0000000000001000
- Value: 0x0000000000002000
- AbbrCode: 0x00000003
Values:
- Value: 0x0000000000001100
- Value: 0x0000000000001300
- AbbrCode: 0x00000003
Values:
- Value: 0x00000000000012FF
- Value: 0x0000000000001300
- AbbrCode: 0x00000000
- AbbrCode: 0x00000000
)";
auto ErrOrSections = DWARFYAML::emitDebugSections(yamldata);
ASSERT_TRUE((bool)ErrOrSections);
std::unique_ptr<DWARFContext> DwarfContext =
DWARFContext::create(*ErrOrSections, 8);
VerifyError(*DwarfContext, "error: DIEs have overlapping address ranges:");
}
TEST(DWARFDebugInfo, TestDwarfVerifyInvalidDIERange) {
// Create a single compile unit with a single function that has an invalid
// address range where the high PC is smaller than the low PC.
StringRef yamldata = R"(
debug_str:
- ''
- /tmp/main.c
- main
debug_abbrev:
- Table:
- Code: 0x00000001
Tag: DW_TAG_compile_unit
Children: DW_CHILDREN_yes
Attributes:
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Code: 0x00000002
Tag: DW_TAG_subprogram
Children: DW_CHILDREN_no
Attributes:
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Attribute: DW_AT_low_pc
Form: DW_FORM_addr
- Attribute: DW_AT_high_pc
Form: DW_FORM_addr
debug_info:
- Version: 4
AddrSize: 8
Entries:
- AbbrCode: 0x00000001
Values:
- Value: 0x0000000000000001
- AbbrCode: 0x00000002
Values:
- Value: 0x000000000000000D
- Value: 0x0000000000001000
- Value: 0x0000000000000900
- AbbrCode: 0x00000000
)";
auto ErrOrSections = DWARFYAML::emitDebugSections(yamldata);
ASSERT_TRUE((bool)ErrOrSections);
std::unique_ptr<DWARFContext> DwarfContext =
DWARFContext::create(*ErrOrSections, 8);
VerifyError(*DwarfContext, "error: Invalid address range");
}
TEST(DWARFDebugInfo, TestDwarfVerifyElidedDoesntFail) {
// Create a single compile unit with two functions: one that has a valid range
// and one whose low and high PC are the same. When the low and high PC are
// the same, this indicates the function was dead code stripped. We want to
// ensure that verification succeeds.
StringRef yamldata = R"(
debug_str:
- ''
- /tmp/main.c
- main
- elided
debug_abbrev:
- Table:
- Code: 0x00000001
Tag: DW_TAG_compile_unit
Children: DW_CHILDREN_yes
Attributes:
- Attribute: DW_AT_low_pc
Form: DW_FORM_addr
- Attribute: DW_AT_high_pc
Form: DW_FORM_addr
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Code: 0x00000002
Tag: DW_TAG_subprogram
Children: DW_CHILDREN_no
Attributes:
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Attribute: DW_AT_low_pc
Form: DW_FORM_addr
- Attribute: DW_AT_high_pc
Form: DW_FORM_addr
debug_info:
- Version: 4
AddrSize: 8
Entries:
- AbbrCode: 0x00000001
Values:
- Value: 0x0000000000001000
- Value: 0x0000000000002000
- Value: 0x0000000000000001
- AbbrCode: 0x00000002
Values:
- Value: 0x000000000000000D
- Value: 0x0000000000001000
- Value: 0x0000000000002000
- AbbrCode: 0x00000002
Values:
- Value: 0x0000000000000012
- Value: 0x0000000000002000
- Value: 0x0000000000002000
- AbbrCode: 0x00000000
)";
auto ErrOrSections = DWARFYAML::emitDebugSections(yamldata);
ASSERT_TRUE((bool)ErrOrSections);
std::unique_ptr<DWARFContext> DwarfContext =
DWARFContext::create(*ErrOrSections, 8);
VerifySuccess(*DwarfContext);
}
TEST(DWARFDebugInfo, TestDwarfVerifyNestedFunctions) {
// Create a single compile unit with a nested function which is not contained
// in its parent. Although LLVM doesn't generate this, it is valid accoridng
// to the DWARF standard.
StringRef yamldata = R"(
debug_str:
- ''
- /tmp/main.c
- main
- nested
debug_abbrev:
- Table:
- Code: 0x00000001
Tag: DW_TAG_compile_unit
Children: DW_CHILDREN_yes
Attributes:
- Attribute: DW_AT_low_pc
Form: DW_FORM_addr
- Attribute: DW_AT_high_pc
Form: DW_FORM_addr
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Code: 0x00000002
Tag: DW_TAG_subprogram
Children: DW_CHILDREN_yes
Attributes:
- Attribute: DW_AT_name
Form: DW_FORM_strp
- Attribute: DW_AT_low_pc
Form: DW_FORM_addr
- Attribute: DW_AT_high_pc
Form: DW_FORM_addr
debug_info:
- Version: 4
AddrSize: 8
Entries:
- AbbrCode: 0x00000001
Values:
- Value: 0x0000000000001000
- Value: 0x0000000000002000
- Value: 0x0000000000000001
- AbbrCode: 0x00000002
Values:
- Value: 0x000000000000000D
- Value: 0x0000000000001000
- Value: 0x0000000000001500
- AbbrCode: 0x00000002
Values:
- Value: 0x0000000000000012
- Value: 0x0000000000001500
- Value: 0x0000000000002000
- AbbrCode: 0x00000000
- AbbrCode: 0x00000000
- AbbrCode: 0x00000000
)";
auto ErrOrSections = DWARFYAML::emitDebugSections(yamldata);
ASSERT_TRUE((bool)ErrOrSections);
std::unique_ptr<DWARFContext> DwarfContext =
DWARFContext::create(*ErrOrSections, 8);
VerifySuccess(*DwarfContext);
}
TEST(DWARFDebugInfo, TestDWARFDieRangeInfoContains) {
DWARFVerifier::DieRangeInfo Empty;
ASSERT_TRUE(Empty.contains(Empty));
DWARFVerifier::DieRangeInfo Ranges(
{{0x10, 0x20}, {0x30, 0x40}, {0x40, 0x50}});
ASSERT_TRUE(Ranges.contains(Empty));
ASSERT_FALSE(Ranges.contains({{{0x0f, 0x10}}}));
ASSERT_FALSE(Ranges.contains({{{0x0f, 0x20}}}));
ASSERT_FALSE(Ranges.contains({{{0x0f, 0x21}}}));
// Test ranges that start at R's start address
ASSERT_TRUE(Ranges.contains({{{0x10, 0x10}}}));
ASSERT_TRUE(Ranges.contains({{{0x10, 0x11}}}));
ASSERT_TRUE(Ranges.contains({{{0x10, 0x20}}}));
ASSERT_FALSE(Ranges.contains({{{0x10, 0x21}}}));
ASSERT_TRUE(Ranges.contains({{{0x11, 0x12}}}));
// Test ranges that start at last bytes of Range
ASSERT_TRUE(Ranges.contains({{{0x1f, 0x20}}}));
ASSERT_FALSE(Ranges.contains({{{0x1f, 0x21}}}));
// Test ranges that start after Range
ASSERT_TRUE(Ranges.contains({{{0x20, 0x20}}}));
ASSERT_FALSE(Ranges.contains({{{0x20, 0x21}}}));
ASSERT_TRUE(Ranges.contains({{{0x31, 0x32}}}));
ASSERT_TRUE(Ranges.contains({{{0x3f, 0x40}}}));
ASSERT_TRUE(Ranges.contains({{{0x10, 0x20}, {0x30, 0x40}}}));
ASSERT_TRUE(Ranges.contains({{{0x11, 0x12}, {0x31, 0x32}}}));
ASSERT_TRUE(Ranges.contains(
{{{0x11, 0x12}, {0x12, 0x13}, {0x31, 0x32}, {0x32, 0x33}}}));
ASSERT_FALSE(Ranges.contains({{{0x11, 0x12},
{0x12, 0x13},
{0x20, 0x21},
{0x31, 0x32},
{0x32, 0x33}}}));
ASSERT_FALSE(Ranges.contains(
{{{0x11, 0x12}, {0x12, 0x13}, {0x31, 0x32}, {0x32, 0x51}}}));
ASSERT_TRUE(Ranges.contains({{{0x11, 0x12}, {0x30, 0x50}}}));
ASSERT_FALSE(Ranges.contains({{{0x30, 0x51}}}));
ASSERT_FALSE(Ranges.contains({{{0x50, 0x51}}}));
}
namespace {
void AssertRangesIntersect(const DWARFAddressRange &LHS,
const DWARFAddressRange &RHS) {
ASSERT_TRUE(LHS.intersects(RHS));
ASSERT_TRUE(RHS.intersects(LHS));
}
void AssertRangesDontIntersect(const DWARFAddressRange &LHS,
const DWARFAddressRange &RHS) {
ASSERT_FALSE(LHS.intersects(RHS));
ASSERT_FALSE(RHS.intersects(LHS));
}
void AssertRangesIntersect(const DWARFVerifier::DieRangeInfo &LHS,
const DWARFAddressRangesVector &Ranges) {
DWARFVerifier::DieRangeInfo RHS(Ranges);
ASSERT_TRUE(LHS.intersects(RHS));
ASSERT_TRUE(RHS.intersects(LHS));
}
void AssertRangesDontIntersect(const DWARFVerifier::DieRangeInfo &LHS,
const DWARFAddressRangesVector &Ranges) {
DWARFVerifier::DieRangeInfo RHS(Ranges);
ASSERT_FALSE(LHS.intersects(RHS));
ASSERT_FALSE(RHS.intersects(LHS));
}
} // namespace
TEST(DWARFDebugInfo, TestDwarfRangesIntersect) {
DWARFAddressRange R(0x10, 0x20);
//----------------------------------------------------------------------
// Test ranges that start before R...
//----------------------------------------------------------------------
// Other range ends before start of R
AssertRangesDontIntersect(R, {0x00, 0x10});
// Other range end address is start of a R
AssertRangesIntersect(R, {0x00, 0x11});
// Other range end address is in R
AssertRangesIntersect(R, {0x00, 0x15});
// Other range end address is at and of R
AssertRangesIntersect(R, {0x00, 0x20});
// Other range end address is past end of R
AssertRangesIntersect(R, {0x00, 0x40});
//----------------------------------------------------------------------
// Test ranges that start at R's start address
//----------------------------------------------------------------------
// Ensure empty ranges doesn't match
AssertRangesDontIntersect(R, {0x10, 0x10});
// 1 byte of Range
AssertRangesIntersect(R, {0x10, 0x11});
// same as Range
AssertRangesIntersect(R, {0x10, 0x20});
// 1 byte past Range
AssertRangesIntersect(R, {0x10, 0x21});
//----------------------------------------------------------------------
// Test ranges that start inside Range
//----------------------------------------------------------------------
// empty in range
AssertRangesDontIntersect(R, {0x11, 0x11});
// all in Range
AssertRangesIntersect(R, {0x11, 0x1f});
// ends at end of Range
AssertRangesIntersect(R, {0x11, 0x20});
// ends past Range
AssertRangesIntersect(R, {0x11, 0x21});
//----------------------------------------------------------------------
// Test ranges that start at last bytes of Range
//----------------------------------------------------------------------
// ends at end of Range
AssertRangesIntersect(R, {0x1f, 0x20});
// ends past Range
AssertRangesIntersect(R, {0x1f, 0x21});
//----------------------------------------------------------------------
// Test ranges that start after Range
//----------------------------------------------------------------------
// empty just past in Range
AssertRangesDontIntersect(R, {0x20, 0x20});
// valid past Range
AssertRangesDontIntersect(R, {0x20, 0x21});
}
TEST(DWARFDebugInfo, TestDWARFDieRangeInfoIntersects) {
DWARFVerifier::DieRangeInfo Ranges({{0x10, 0x20}, {0x30, 0x40}});
// Test empty range
AssertRangesDontIntersect(Ranges, {});
// Test range that appears before all ranges in Ranges
AssertRangesDontIntersect(Ranges, {{0x00, 0x10}});
// Test range that appears between ranges in Ranges
AssertRangesDontIntersect(Ranges, {{0x20, 0x30}});
// Test range that appears after ranges in Ranges
AssertRangesDontIntersect(Ranges, {{0x40, 0x50}});
// Test range that start before first range
AssertRangesIntersect(Ranges, {{0x00, 0x11}});
// Test range that start at first range
AssertRangesIntersect(Ranges, {{0x10, 0x11}});
// Test range that start in first range
AssertRangesIntersect(Ranges, {{0x11, 0x12}});
// Test range that start at end of first range
AssertRangesIntersect(Ranges, {{0x1f, 0x20}});
// Test range that starts at end of first range
AssertRangesDontIntersect(Ranges, {{0x20, 0x21}});
// Test range that starts at end of first range
AssertRangesIntersect(Ranges, {{0x20, 0x31}});
// Test range that start before second range and ends before second
AssertRangesDontIntersect(Ranges, {{0x2f, 0x30}});
// Test range that start before second range and ends in second
AssertRangesIntersect(Ranges, {{0x2f, 0x31}});
// Test range that start at second range
AssertRangesIntersect(Ranges, {{0x30, 0x31}});
// Test range that start in second range
AssertRangesIntersect(Ranges, {{0x31, 0x32}});
// Test range that start at end of second range
AssertRangesIntersect(Ranges, {{0x3f, 0x40}});
// Test range that starts at end of second range
AssertRangesDontIntersect(Ranges, {{0x40, 0x41}});
AssertRangesDontIntersect(Ranges, {{0x20, 0x21}, {0x2f, 0x30}});
AssertRangesIntersect(Ranges, {{0x20, 0x21}, {0x2f, 0x31}});
}
TEST(DWARFDebugInfo, TestDWARF64UnitLength) {
static const char DebugInfoSecRaw[] =
"\xff\xff\xff\xff" // DWARF64 mark
"\x88\x77\x66\x55\x44\x33\x22\x11" // Length
"\x05\x00" // Version
"\x01" // DW_UT_compile
"\x04" // Address size
"\0\0\0\0\0\0\0\0"; // Offset Into Abbrev. Sec.
StringMap<std::unique_ptr<MemoryBuffer>> Sections;
Sections.insert(std::make_pair(
"debug_info", MemoryBuffer::getMemBuffer(StringRef(
DebugInfoSecRaw, sizeof(DebugInfoSecRaw) - 1))));
auto Context = DWARFContext::create(Sections, /* AddrSize = */ 4,
/* isLittleEndian = */ true);
const auto &Obj = Context->getDWARFObj();
Obj.forEachInfoSections([&](const DWARFSection &Sec) {
DWARFUnitHeader Header;
DWARFDataExtractor Data(Obj, Sec, /* IsLittleEndian = */ true,
/* AddressSize = */ 4);
uint64_t Offset = 0;
EXPECT_FALSE(Header.extract(*Context, Data, &Offset, DW_SECT_INFO));
// Header.extract() returns false because there is not enough space
// in the section for the declared length. Anyway, we can check that
// the properties are read correctly.
ASSERT_EQ(DwarfFormat::DWARF64, Header.getFormat());
ASSERT_EQ(0x1122334455667788ULL, Header.getLength());
ASSERT_EQ(5, Header.getVersion());
ASSERT_EQ(DW_UT_compile, Header.getUnitType());
ASSERT_EQ(4, Header.getAddressByteSize());
// Check that the length can be correctly read in the unit class.
DWARFUnitVector DummyUnitVector;
DWARFSection DummySec;
DWARFCompileUnit CU(*Context, Sec, Header, /* DA = */ 0, /* RS = */ 0,
/* LocSection = */ 0, /* SS = */ StringRef(),
/* SOS = */ DummySec, /* AOS = */ 0,
/* LS = */ DummySec, /* LE = */ true,
/* isDWO= */ false, DummyUnitVector);
ASSERT_EQ(0x1122334455667788ULL, CU.getLength());
});
}
} // end anonymous namespace