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[dwarfdump] Add support for dumping accelerator tables.

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The class used for the dump only allows to dump for the moment, but
it can (and will) be easily extended to support search also.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221836 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Frederic Riss 2014-11-12 23:48:10 +00:00
parent 0275be3a97
commit 931e22fd7c
9 changed files with 359 additions and 1 deletions
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6
include/llvm/DebugInfo/DIContext.h
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@ -107,7 +107,11 @@ enum DIDumpType {
DIDT_GnuPubtypes,
DIDT_Str,
DIDT_StrDwo,
DIDT_StrOffsetsDwo
DIDT_StrOffsetsDwo,
DIDT_AppleNames,
DIDT_AppleTypes,
DIDT_AppleNamespaces,
DIDT_AppleObjC
};
// In place of applying the relocations to the data we've read from disk we use

1
lib/DebugInfo/CMakeLists.txt
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@ -1,6 +1,7 @@
add_llvm_library(LLVMDebugInfo
DIContext.cpp
DWARFAbbreviationDeclaration.cpp
DWARFAcceleratorTable.cpp
DWARFCompileUnit.cpp
DWARFContext.cpp
DWARFDebugAbbrev.cpp

110
lib/DebugInfo/DWARFAcceleratorTable.cpp Normal file
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@ -0,0 +1,110 @@
#include "DWARFAcceleratorTable.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/raw_ostream.h"
namespace llvm {
bool DWARFAcceleratorTable::extract() {
uint32_t Offset = 0;
// Check that we can at least read the header.
if (!AccelSection.isValidOffset(offsetof(Header, HeaderDataLength)+4))
return false;
Hdr.Magic = AccelSection.getU32(&Offset);
Hdr.Version = AccelSection.getU16(&Offset);
Hdr.HashFunction = AccelSection.getU16(&Offset);
Hdr.NumBuckets = AccelSection.getU32(&Offset);
Hdr.NumHashes = AccelSection.getU32(&Offset);
Hdr.HeaderDataLength = AccelSection.getU32(&Offset);
// Check that we can read all the hashes and offsets from the
// section (see SourceLevelDebugging.rst for the structure of the index).
if (!AccelSection.isValidOffset(sizeof(Hdr) + Hdr.HeaderDataLength +
Hdr.NumBuckets*4 + Hdr.NumHashes*8))
return false;
HdrData.DIEOffsetBase = AccelSection.getU32(&Offset);
uint32_t NumAtoms = AccelSection.getU32(&Offset);
for (unsigned i = 0; i < NumAtoms; ++i) {
auto Atom = std::make_pair(AccelSection.getU16(&Offset),
DWARFFormValue(AccelSection.getU16(&Offset)));
HdrData.Atoms.push_back(Atom);
}
return true;
}
void DWARFAcceleratorTable::dump(raw_ostream &OS) {
// Dump the header.
OS << "Magic = " << format("0x%08x", Hdr.Magic) << '\n';
OS << "Version = " << format("0x%04x", Hdr.Version) << '\n';
OS << "Hash function = " << format("0x%08x", Hdr.HashFunction) << '\n';
OS << "Bucket count = " << Hdr.NumBuckets << '\n';
OS << "Hashes count = " << Hdr.NumHashes << '\n';
OS << "HeaderData length = " << Hdr.HeaderDataLength << '\n';
OS << "DIE offset base = " << HdrData.DIEOffsetBase << '\n';
OS << "Number of atoms = " << HdrData.Atoms.size() << '\n';
unsigned i = 0;
for (const auto &Atom: HdrData.Atoms) {
OS << format("Atom[%d] ", i++);
OS << " Type: " << dwarf::AtomTypeString(Atom.first);
OS << " Form: " << dwarf::FormEncodingString(Atom.second.getForm());
OS << "\n";
}
// Now go through the actual tables and dump them.
uint32_t Offset = sizeof(Hdr) + Hdr.HeaderDataLength;
unsigned HashesBase = Offset + Hdr.NumBuckets * 4;
unsigned OffsetsBase = HashesBase + Hdr.NumHashes * 4;
for (unsigned Bucket = 0; Bucket < Hdr.NumBuckets; ++Bucket) {
unsigned Index;
Index = AccelSection.getU32(&Offset);
OS << format("Bucket[%d]\n", Bucket);
if (Index == UINT32_MAX) {
OS << " EMPTY\n";
continue;
}
for (unsigned HashIdx = Index; HashIdx < Hdr.NumHashes; ++HashIdx) {
unsigned HashOffset = HashesBase + HashIdx*4;
unsigned OffsetsOffset = OffsetsBase + HashIdx*4;
uint32_t Hash = AccelSection.getU32(&HashOffset);
if (Hash % Hdr.NumBuckets != Bucket)
break;
unsigned DataOffset = AccelSection.getU32(&OffsetsOffset);
OS << format(" Hash = 0x%08x Offset = 0x%08x\n", Hash, DataOffset);
if (!AccelSection.isValidOffset(DataOffset)) {
OS << " Invalid section offset\n";
continue;
}
while (unsigned StringOffset = AccelSection.getU32(&DataOffset)) {
OS << format(" Name: %08x \"%s\"\n", StringOffset,
StringSection.getCStr(&StringOffset));
unsigned NumData = AccelSection.getU32(&DataOffset);
for (unsigned Data = 0; Data < NumData; ++Data) {
OS << format(" Data[%d] => ", Data);
unsigned i = 0;
for (auto &Atom : HdrData.Atoms) {
OS << format("{Atom[%d]: ", i++);
if (Atom.second.extractValue(AccelSection, &DataOffset, nullptr))
Atom.second.dump(OS, nullptr);
else
OS << "Error extracting the value";
OS << "} ";
}
OS << '\n';
}
}
}
}
}
}

38
lib/DebugInfo/DWARFAcceleratorTable.h Normal file
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@ -0,0 +1,38 @@
#include "llvm/ADT/SmallVector.h"
#include "llvm/DebugInfo/DWARFFormValue.h"
#include <cstdint>
namespace llvm {
class DWARFAcceleratorTable {
struct Header {
uint32_t Magic;
uint16_t Version;
uint16_t HashFunction;
uint32_t NumBuckets;
uint32_t NumHashes;
uint32_t HeaderDataLength;
};
struct HeaderData {
typedef uint16_t AtomType;
uint32_t DIEOffsetBase;
SmallVector<std::pair<AtomType, DWARFFormValue>, 1> Atoms;
};
struct Header Hdr;
struct HeaderData HdrData;
DataExtractor AccelSection;
DataExtractor StringSection;
public:
DWARFAcceleratorTable(DataExtractor AccelSection, DataExtractor StringSection)
: AccelSection(AccelSection), StringSection(StringSection) {}
bool extract();
void dump(raw_ostream &OS);
};
}

33
lib/DebugInfo/DWARFContext.cpp
View File

@ -9,6 +9,7 @@
#include "DWARFContext.h"
#include "DWARFDebugArangeSet.h"
#include "DWARFAcceleratorTable.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringSwitch.h"
@ -59,6 +60,17 @@ static void dumpPubSection(raw_ostream &OS, StringRef Name, StringRef Data,
}
}
static void dumpAccelSection(raw_ostream &OS, StringRef Name, StringRef Data,
StringRef StringSection, bool LittleEndian) {
DataExtractor AccelSection(Data, LittleEndian, 0);
DataExtractor StrData(StringSection, LittleEndian, 0);
OS << "\n." << Name << " contents:\n";
DWARFAcceleratorTable Accel(AccelSection, StrData);
if (!Accel.extract())
return;
Accel.dump(OS);
}
void DWARFContext::dump(raw_ostream &OS, DIDumpType DumpType) {
if (DumpType == DIDT_All || DumpType == DIDT_Abbrev) {
OS << ".debug_abbrev contents:\n";
@ -218,6 +230,22 @@ void DWARFContext::dump(raw_ostream &OS, DIDumpType DumpType) {
OS << format("%8.8x\n", strOffsetExt.getU32(&offset));
}
}
if (DumpType == DIDT_All || DumpType == DIDT_AppleNames)
dumpAccelSection(OS, "apple_names", getAppleNamesSection(),
getStringSection(), isLittleEndian());
if (DumpType == DIDT_All || DumpType == DIDT_AppleTypes)
dumpAccelSection(OS, "apple_types", getAppleTypesSection(),
getStringSection(), isLittleEndian());
if (DumpType == DIDT_All || DumpType == DIDT_AppleNamespaces)
dumpAccelSection(OS, "apple_namespaces", getAppleNamespacesSection(),
getStringSection(), isLittleEndian());
if (DumpType == DIDT_All || DumpType == DIDT_AppleObjC)
dumpAccelSection(OS, "apple_objc", getAppleObjCSection(),
getStringSection(), isLittleEndian());
}
const DWARFDebugAbbrev *DWARFContext::getDebugAbbrev() {
@ -565,6 +593,11 @@ DWARFContextInMemory::DWARFContextInMemory(const object::ObjectFile &Obj)
.Case("debug_str.dwo", &StringDWOSection)
.Case("debug_str_offsets.dwo", &StringOffsetDWOSection)
.Case("debug_addr", &AddrSection)
.Case("apple_names", &AppleNamesSection)
.Case("apple_types", &AppleTypesSection)
.Case("apple_namespaces", &AppleNamespacesSection)
.Case("apple_namespac", &AppleNamespacesSection)
.Case("apple_objc", &AppleObjCSection)
// Any more debug info sections go here.
.Default(nullptr);
if (SectionData) {

12
lib/DebugInfo/DWARFContext.h
View File

@ -192,6 +192,10 @@ public:
virtual StringRef getStringOffsetDWOSection() = 0;
virtual StringRef getRangeDWOSection() = 0;
virtual StringRef getAddrSection() = 0;
virtual StringRef getAppleNamesSection() = 0;
virtual StringRef getAppleTypesSection() = 0;
virtual StringRef getAppleNamespacesSection() = 0;
virtual StringRef getAppleObjCSection() = 0;
static bool isSupportedVersion(unsigned version) {
return version == 2 || version == 3 || version == 4;
@ -236,6 +240,10 @@ class DWARFContextInMemory : public DWARFContext {
StringRef StringOffsetDWOSection;
StringRef RangeDWOSection;
StringRef AddrSection;
StringRef AppleNamesSection;
StringRef AppleTypesSection;
StringRef AppleNamespacesSection;
StringRef AppleObjCSection;
SmallVector<SmallString<32>, 4> UncompressedSections;
@ -256,6 +264,10 @@ public:
StringRef getPubTypesSection() override { return PubTypesSection; }
StringRef getGnuPubNamesSection() override { return GnuPubNamesSection; }
StringRef getGnuPubTypesSection() override { return GnuPubTypesSection; }
StringRef getAppleNamesSection() override { return AppleNamesSection; }
StringRef getAppleTypesSection() override { return AppleTypesSection; }
StringRef getAppleNamespacesSection() override { return AppleNamespacesSection; }
StringRef getAppleObjCSection() override { return AppleObjCSection; }
// Sections for DWARF5 split dwarf proposal.
const DWARFSection &getInfoDWOSection() override { return InfoDWOSection; }

2
test/DebugInfo/Inputs/gmlt.ll
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@ -95,6 +95,8 @@
; CHECK: .debug_pubtypes contents:
; CHECK-NOT: Offset
; CHECK: .apple{{.*}} contents:
; Function Attrs: nounwind uwtable
define void @_Z2f1v() #0 {
entry:

154
test/DebugInfo/dwarfdump-accel.test Normal file
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@ -0,0 +1,154 @@
RUN: llvm-dwarfdump %p/Inputs/dwarfdump-objc.x86_64.o | FileCheck %s
CHECK: .apple_names contents:
CHECK: Magic = 0x48415348
CHECK: Version = 0x0001
CHECK: Hash function = 0x00000000
CHECK: Bucket count = 11
CHECK: Hashes count = 22
CHECK: HeaderData length = 12
CHECK: DIE offset base = 0
CHECK: Number of atoms = 1
CHECK: Atom[0] Type: DW_ATOM_die_offset Form: DW_FORM_data4
CHECK: Bucket[0]
CHECK: Hash = 0x248050fe Offset = 0x000000fc
CHECK: Name: 00000165 "-[TestInterface Retain]"
CHECK: Data[0] => {Atom[0]: 0x0000024f}
CHECK: Bucket[1]
CHECK: Hash = 0x926d42cc Offset = 0x0000010c
CHECK: Name: 00000057 "ReadWrite"
CHECK: Data[0] => {Atom[0]: 0x000001cb}
CHECK: Bucket[2]
CHECK: EMPTY
CHECK: Bucket[3]
CHECK: Hash = 0x99254268 Offset = 0x0000011c
CHECK: Name: 0000013f "-[TestInterface setReadWrite:]"
CHECK: Data[0] => {Atom[0]: 0x00000209}
CHECK: Hash = 0x946f52b9 Offset = 0x0000012c
CHECK: Name: 000000c6 "-[TestInterface ReadOnly]"
CHECK: Data[0] => {Atom[0]: 0x00000109}
CHECK: Bucket[4]
CHECK: EMPTY
CHECK: Bucket[5]
CHECK: EMPTY
CHECK: Bucket[6]
CHECK: Hash = 0x6e8e91a3 Offset = 0x0000013c
CHECK: Name: 000001e0 "-[TestInterface NonAtomic]"
CHECK: Data[0] => {Atom[0]: 0x00000357}
CHECK: Hash = 0x7d1a5012 Offset = 0x0000014c
CHECK: Name: 0000014d "setReadWrite:"
CHECK: Data[0] => {Atom[0]: 0x00000209}
CHECK: Hash = 0xb65f49d3 Offset = 0x0000015c
CHECK: Name: 0000020d "setNonAtomic:"
CHECK: Data[0] => {Atom[0]: 0x00000395}
CHECK: Hash = 0x354997e2 Offset = 0x0000016c
CHECK: Name: 00000120 "-[TestInterface ReadWrite]"
CHECK: Data[0] => {Atom[0]: 0x000001cb}
CHECK: Bucket[7]
CHECK: Hash = 0xce8af9c8 Offset = 0x0000017c
CHECK: Name: 0000005e "Retain"
CHECK: Data[0] => {Atom[0]: 0x0000024f}
CHECK: Hash = 0xa7e0338a Offset = 0x0000018c
CHECK: Name: 0000004d "Assign"
CHECK: Data[0] => {Atom[0]: 0x00000147}
CHECK: Hash = 0xa9812410 Offset = 0x0000019c
CHECK: Name: 00000105 "setAssign:"
CHECK: Data[0] => {Atom[0]: 0x00000185}
CHECK: Hash = 0x218d07f6 Offset = 0x000001ac
CHECK: Name: 000001a2 "-[TestInterface Copy]"
CHECK: Data[0] => {Atom[0]: 0x000002d3}
CHECK: Hash = 0x0456817c Offset = 0x000001bc
CHECK: Name: 000001bc "-[TestInterface setCopy:]"
CHECK: Data[0] => {Atom[0]: 0x00000311}
CHECK: Hash = 0x7c83b400 Offset = 0x000001cc
CHECK: Name: 0000006c "Copy"
CHECK: Data[0] => {Atom[0]: 0x000002d3}
CHECK: Bucket[8]
CHECK: Hash = 0x0f918046 Offset = 0x000001dc
CHECK: Name: 000001c5 "setCopy:"
CHECK: Data[0] => {Atom[0]: 0x00000311}
CHECK: Hash = 0xfb097449 Offset = 0x000001ec
CHECK: Name: 000001ff "-[TestInterface setNonAtomic:]"
CHECK: Data[0] => {Atom[0]: 0x00000395}
CHECK: Hash = 0x71069de3 Offset = 0x000001fc
CHECK: Name: 00000042 "ReadOnly"
CHECK: Data[0] => {Atom[0]: 0x00000109}
CHECK: Bucket[9]
CHECK: Hash = 0xd55908c6 Offset = 0x0000020c
CHECK: Name: 000000fa "-[TestInterface setAssign:]"
CHECK: Data[0] => {Atom[0]: 0x00000185}
CHECK: Hash = 0xa584b20e Offset = 0x0000021c
CHECK: Name: 0000018c "setRetain:"
CHECK: Data[0] => {Atom[0]: 0x0000028d}
CHECK: Hash = 0x9429886d Offset = 0x0000022c
CHECK: Name: 00000076 "NonAtomic"
CHECK: Data[0] => {Atom[0]: 0x00000357}
CHECK: Hash = 0x287cc300 Offset = 0x0000023c
CHECK: Name: 000000de "-[TestInterface Assign]"
CHECK: Data[0] => {Atom[0]: 0x00000147}
CHECK: Hash = 0x51ce5684 Offset = 0x0000024c
CHECK: Name: 00000181 "-[TestInterface setRetain:]"
CHECK: Data[0] => {Atom[0]: 0x0000028d}
CHECK: Bucket[10]
CHECK: EMPTY
CHECK: .apple_types contents:
CHECK: Magic = 0x48415348
CHECK: Version = 0x0001
CHECK: Hash function = 0x00000000
CHECK: Bucket count = 4
CHECK: Hashes count = 4
CHECK: HeaderData length = 20
CHECK: DIE offset base = 0
CHECK: Number of atoms = 3
CHECK: Atom[0] Type: DW_ATOM_die_offset Form: DW_FORM_data4
CHECK: Atom[1] Type: DW_ATOM_die_tag Form: DW_FORM_data2
CHECK: Atom[2] Type: DW_ATOM_type_flags Form: DW_FORM_data1
CHECK: Bucket[0]
CHECK: Hash = 0x0b888030 Offset = 0x00000058
CHECK: Name: 00000046 "int"
CHECK: Data[0] => {Atom[0]: 0x000000f4} {Atom[1]: 0x0024} {Atom[2]: 0x00}
CHECK: Bucket[1]
CHECK: Hash = 0x0b881d29 Offset = 0x0000006b
CHECK: Name: 0000021b "SEL"
CHECK: Data[0] => {Atom[0]: 0x000003e0} {Atom[1]: 0x0016} {Atom[2]: 0x00}
CHECK: Hash = 0x2c549f3d Offset = 0x0000007e
CHECK: Name: 00000067 "NSObject"
CHECK: Data[0] => {Atom[0]: 0x00000100} {Atom[1]: 0x0013} {Atom[2]: 0x00}
CHECK: Bucket[2]
CHECK: Hash = 0x16a83cb6 Offset = 0x00000091
CHECK: Name: 00000039 "TestInterface"
CHECK: Data[0] => {Atom[0]: 0x0000002f} {Atom[1]: 0x0013} {Atom[2]: 0x00}
CHECK: Bucket[3]
CHECK: EMPTY
CHECK: .apple_namespaces contents:
CHECK-NOT: Magic
CHECK: .apple_objc contents:
CHECK: Magic = 0x48415348
CHECK: Version = 0x0001
CHECK: Hash function = 0x00000000
CHECK: Bucket count = 1
CHECK: Hashes count = 1
CHECK: HeaderData length = 12
CHECK: DIE offset base = 0
CHECK: Number of atoms = 1
CHECK: Atom[0] Type: DW_ATOM_die_offset Form: DW_FORM_data4
CHECK: Bucket[0]
CHECK: Hash = 0x16a83cb6 Offset = 0x0000002c
CHECK: Name: 00000039 "TestInterface"
CHECK: Data[0] => {Atom[0]: 0x00000109}
CHECK: Data[1] => {Atom[0]: 0x00000147}
CHECK: Data[2] => {Atom[0]: 0x00000185}
CHECK: Data[3] => {Atom[0]: 0x000001cb}
CHECK: Data[4] => {Atom[0]: 0x00000209}
CHECK: Data[5] => {Atom[0]: 0x0000024f}
CHECK: Data[6] => {Atom[0]: 0x0000028d}
CHECK: Data[7] => {Atom[0]: 0x000002d3}
CHECK: Data[8] => {Atom[0]: 0x00000311}
CHECK: Data[9] => {Atom[0]: 0x00000357}
CHECK: Data[10] => {Atom[0]: 0x00000395}

4
tools/llvm-dwarfdump/llvm-dwarfdump.cpp
View File

@ -45,6 +45,10 @@ DumpType("debug-dump", cl::init(DIDT_All),
clEnumValN(DIDT_All, "all", "Dump all debug sections"),
clEnumValN(DIDT_Abbrev, "abbrev", ".debug_abbrev"),
clEnumValN(DIDT_AbbrevDwo, "abbrev.dwo", ".debug_abbrev.dwo"),
clEnumValN(DIDT_AppleNames, "apple_names", ".apple_names"),
clEnumValN(DIDT_AppleTypes, "apple_types", ".apple_types"),
clEnumValN(DIDT_AppleNamespaces, "apple_namespaces", ".apple_namespaces"),
clEnumValN(DIDT_AppleObjC, "apple_objc", ".apple_objc"),
clEnumValN(DIDT_Aranges, "aranges", ".debug_aranges"),
clEnumValN(DIDT_Info, "info", ".debug_info"),
clEnumValN(DIDT_InfoDwo, "info.dwo", ".debug_info.dwo"),