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-rw-r--r--contrib/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp203
1 files changed, 67 insertions, 136 deletions
diff --git a/contrib/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp b/contrib/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
index e8ea71b..77f6f65 100644
--- a/contrib/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
+++ b/contrib/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
@@ -12,7 +12,9 @@
#include "llvm/ADT/StringSwitch.h"
#include "llvm/DebugInfo/DWARF/DWARFAcceleratorTable.h"
#include "llvm/DebugInfo/DWARF/DWARFDebugArangeSet.h"
+#include "llvm/DebugInfo/DWARF/DWARFDebugPubTable.h"
#include "llvm/DebugInfo/DWARF/DWARFUnitIndex.h"
+#include "llvm/Object/Decompressor.h"
#include "llvm/Object/MachO.h"
#include "llvm/Object/RelocVisitor.h"
#include "llvm/Support/Compression.h"
@@ -32,37 +34,6 @@ typedef DWARFDebugLine::LineTable DWARFLineTable;
typedef DILineInfoSpecifier::FileLineInfoKind FileLineInfoKind;
typedef DILineInfoSpecifier::FunctionNameKind FunctionNameKind;
-static void dumpPubSection(raw_ostream &OS, StringRef Name, StringRef Data,
- bool LittleEndian, bool GnuStyle) {
- OS << "\n." << Name << " contents:\n";
- DataExtractor pubNames(Data, LittleEndian, 0);
- uint32_t offset = 0;
- while (pubNames.isValidOffset(offset)) {
- OS << "length = " << format("0x%08x", pubNames.getU32(&offset));
- OS << " version = " << format("0x%04x", pubNames.getU16(&offset));
- OS << " unit_offset = " << format("0x%08x", pubNames.getU32(&offset));
- OS << " unit_size = " << format("0x%08x", pubNames.getU32(&offset)) << '\n';
- if (GnuStyle)
- OS << "Offset Linkage Kind Name\n";
- else
- OS << "Offset Name\n";
-
- while (offset < Data.size()) {
- uint32_t dieRef = pubNames.getU32(&offset);
- if (dieRef == 0)
- break;
- OS << format("0x%8.8x ", dieRef);
- if (GnuStyle) {
- PubIndexEntryDescriptor desc(pubNames.getU8(&offset));
- OS << format("%-8s", dwarf::GDBIndexEntryLinkageString(desc.Linkage))
- << ' ' << format("%-8s", dwarf::GDBIndexEntryKindString(desc.Kind))
- << ' ';
- }
- OS << '\"' << pubNames.getCStr(&offset) << "\"\n";
- }
- }
-}
-
static void dumpAccelSection(raw_ostream &OS, StringRef Name,
const DWARFSection& Section, StringRef StringSection,
bool LittleEndian) {
@@ -75,7 +46,8 @@ static void dumpAccelSection(raw_ostream &OS, StringRef Name,
Accel.dump(OS);
}
-void DWARFContext::dump(raw_ostream &OS, DIDumpType DumpType, bool DumpEH) {
+void DWARFContext::dump(raw_ostream &OS, DIDumpType DumpType, bool DumpEH,
+ bool SummarizeTypes) {
if (DumpType == DIDT_All || DumpType == DIDT_Abbrev) {
OS << ".debug_abbrev contents:\n";
getDebugAbbrev()->dump(OS);
@@ -104,7 +76,7 @@ void DWARFContext::dump(raw_ostream &OS, DIDumpType DumpType, bool DumpEH) {
OS << "\n.debug_types contents:\n";
for (const auto &TUS : type_unit_sections())
for (const auto &TU : TUS)
- TU->dump(OS);
+ TU->dump(OS, SummarizeTypes);
}
if ((DumpType == DIDT_All || DumpType == DIDT_TypesDwo) &&
@@ -112,7 +84,7 @@ void DWARFContext::dump(raw_ostream &OS, DIDumpType DumpType, bool DumpEH) {
OS << "\n.debug_types.dwo contents:\n";
for (const auto &DWOTUS : dwo_type_unit_sections())
for (const auto &DWOTU : DWOTUS)
- DWOTU->dump(OS);
+ DWOTU->dump(OS, SummarizeTypes);
}
if (DumpType == DIDT_All || DumpType == DIDT_Loc) {
@@ -153,16 +125,16 @@ void DWARFContext::dump(raw_ostream &OS, DIDumpType DumpType, bool DumpEH) {
OS << "\n.debug_line contents:\n";
for (const auto &CU : compile_units()) {
savedAddressByteSize = CU->getAddressByteSize();
- const auto *CUDIE = CU->getUnitDIE();
- if (CUDIE == nullptr)
+ auto CUDIE = CU->getUnitDIE();
+ if (!CUDIE)
continue;
- unsigned stmtOffset = CUDIE->getAttributeValueAsSectionOffset(
- CU.get(), DW_AT_stmt_list, -1U);
- if (stmtOffset != -1U) {
+ if (auto StmtOffset =
+ CUDIE.getAttributeValueAsSectionOffset(DW_AT_stmt_list)) {
DataExtractor lineData(getLineSection().Data, isLittleEndian(),
savedAddressByteSize);
DWARFDebugLine::LineTable LineTable;
- LineTable.parse(lineData, &getLineSection().Relocs, &stmtOffset);
+ uint32_t Offset = *StmtOffset;
+ LineTable.parse(lineData, &getLineSection().Relocs, &Offset);
LineTable.dump(OS);
}
}
@@ -228,20 +200,22 @@ void DWARFContext::dump(raw_ostream &OS, DIDumpType DumpType, bool DumpEH) {
}
if (DumpType == DIDT_All || DumpType == DIDT_Pubnames)
- dumpPubSection(OS, "debug_pubnames", getPubNamesSection(),
- isLittleEndian(), false);
+ DWARFDebugPubTable(getPubNamesSection(), isLittleEndian(), false)
+ .dump("debug_pubnames", OS);
if (DumpType == DIDT_All || DumpType == DIDT_Pubtypes)
- dumpPubSection(OS, "debug_pubtypes", getPubTypesSection(),
- isLittleEndian(), false);
+ DWARFDebugPubTable(getPubTypesSection(), isLittleEndian(), false)
+ .dump("debug_pubtypes", OS);
if (DumpType == DIDT_All || DumpType == DIDT_GnuPubnames)
- dumpPubSection(OS, "debug_gnu_pubnames", getGnuPubNamesSection(),
- isLittleEndian(), true /* GnuStyle */);
+ DWARFDebugPubTable(getGnuPubNamesSection(), isLittleEndian(),
+ true /* GnuStyle */)
+ .dump("debug_gnu_pubnames", OS);
if (DumpType == DIDT_All || DumpType == DIDT_GnuPubtypes)
- dumpPubSection(OS, "debug_gnu_pubtypes", getGnuPubTypesSection(),
- isLittleEndian(), true /* GnuStyle */);
+ DWARFDebugPubTable(getGnuPubTypesSection(), isLittleEndian(),
+ true /* GnuStyle */)
+ .dump("debug_gnu_pubtypes", OS);
if ((DumpType == DIDT_All || DumpType == DIDT_StrOffsetsDwo) &&
!getStringOffsetDWOSection().empty()) {
@@ -256,6 +230,12 @@ void DWARFContext::dump(raw_ostream &OS, DIDumpType DumpType, bool DumpEH) {
}
}
+ if ((DumpType == DIDT_All || DumpType == DIDT_GdbIndex) &&
+ !getGdbIndexSection().empty()) {
+ OS << "\n.gnu_index contents:\n";
+ getGdbIndex().dump(OS);
+ }
+
if (DumpType == DIDT_All || DumpType == DIDT_AppleNames)
dumpAccelSection(OS, "apple_names", getAppleNamesSection(),
getStringSection(), isLittleEndian());
@@ -295,6 +275,16 @@ const DWARFUnitIndex &DWARFContext::getTUIndex() {
return *TUIndex;
}
+DWARFGdbIndex &DWARFContext::getGdbIndex() {
+ if (GdbIndex)
+ return *GdbIndex;
+
+ DataExtractor GdbIndexData(getGdbIndexSection(), true /*LE*/, 0);
+ GdbIndex = llvm::make_unique<DWARFGdbIndex>();
+ GdbIndex->parse(GdbIndexData);
+ return *GdbIndex;
+}
+
const DWARFDebugAbbrev *DWARFContext::getDebugAbbrev() {
if (Abbrev)
return Abbrev.get();
@@ -393,16 +383,15 @@ DWARFContext::getLineTableForUnit(DWARFUnit *U) {
if (!Line)
Line.reset(new DWARFDebugLine(&getLineSection().Relocs));
- const auto *UnitDIE = U->getUnitDIE();
- if (UnitDIE == nullptr)
+ auto UnitDIE = U->getUnitDIE();
+ if (!UnitDIE)
return nullptr;
- unsigned stmtOffset =
- UnitDIE->getAttributeValueAsSectionOffset(U, DW_AT_stmt_list, -1U);
- if (stmtOffset == -1U)
+ auto Offset = UnitDIE.getAttributeValueAsSectionOffset(DW_AT_stmt_list);
+ if (!Offset)
return nullptr; // No line table for this compile unit.
- stmtOffset += U->getLineTableOffset();
+ uint32_t stmtOffset = *Offset + U->getLineTableOffset();
// See if the line table is cached.
if (const DWARFLineTable *lt = Line->getLineTable(stmtOffset))
return lt;
@@ -458,14 +447,12 @@ static bool getFunctionNameForAddress(DWARFCompileUnit *CU, uint64_t Address,
return false;
// The address may correspond to instruction in some inlined function,
// so we have to build the chain of inlined functions and take the
- // name of the topmost function in it.
- const DWARFDebugInfoEntryInlinedChain &InlinedChain =
- CU->getInlinedChainForAddress(Address);
- if (InlinedChain.DIEs.size() == 0)
+ // name of the topmost function in it.SmallVectorImpl<DWARFDie> &InlinedChain
+ SmallVector<DWARFDie, 4> InlinedChain;
+ CU->getInlinedChainForAddress(Address, InlinedChain);
+ if (InlinedChain.size() == 0)
return false;
- const DWARFDebugInfoEntryMinimal &TopFunctionDIE = InlinedChain.DIEs[0];
- if (const char *Name =
- TopFunctionDIE.getSubroutineName(InlinedChain.U, Kind)) {
+ if (const char *Name = InlinedChain[0].getSubroutineName(Kind)) {
FunctionName = Name;
return true;
}
@@ -540,9 +527,9 @@ DWARFContext::getInliningInfoForAddress(uint64_t Address,
return InliningInfo;
const DWARFLineTable *LineTable = nullptr;
- const DWARFDebugInfoEntryInlinedChain &InlinedChain =
- CU->getInlinedChainForAddress(Address);
- if (InlinedChain.DIEs.size() == 0) {
+ SmallVector<DWARFDie, 4> InlinedChain;
+ CU->getInlinedChainForAddress(Address, InlinedChain);
+ if (InlinedChain.size() == 0) {
// If there is no DIE for address (e.g. it is in unavailable .dwo file),
// try to at least get file/line info from symbol table.
if (Spec.FLIKind != FileLineInfoKind::None) {
@@ -557,12 +544,11 @@ DWARFContext::getInliningInfoForAddress(uint64_t Address,
}
uint32_t CallFile = 0, CallLine = 0, CallColumn = 0;
- for (uint32_t i = 0, n = InlinedChain.DIEs.size(); i != n; i++) {
- const DWARFDebugInfoEntryMinimal &FunctionDIE = InlinedChain.DIEs[i];
+ for (uint32_t i = 0, n = InlinedChain.size(); i != n; i++) {
+ DWARFDie &FunctionDIE = InlinedChain[i];
DILineInfo Frame;
// Get function name if necessary.
- if (const char *Name =
- FunctionDIE.getSubroutineName(InlinedChain.U, Spec.FNKind))
+ if (const char *Name = FunctionDIE.getSubroutineName(Spec.FNKind))
Frame.FunctionName = Name;
if (Spec.FLIKind != FileLineInfoKind::None) {
if (i == 0) {
@@ -584,8 +570,7 @@ DWARFContext::getInliningInfoForAddress(uint64_t Address,
}
// Get call file/line/column of a current DIE.
if (i + 1 < n) {
- FunctionDIE.getCallerFrame(InlinedChain.U, CallFile, CallLine,
- CallColumn);
+ FunctionDIE.getCallerFrame(CallFile, CallLine, CallColumn);
}
}
InliningInfo.addFrame(Frame);
@@ -593,66 +578,6 @@ DWARFContext::getInliningInfoForAddress(uint64_t Address,
return InliningInfo;
}
-static bool consumeCompressedGnuHeader(StringRef &data,
- uint64_t &OriginalSize) {
- // Consume "ZLIB" prefix.
- if (!data.startswith("ZLIB"))
- return false;
- data = data.substr(4);
- // Consume uncompressed section size (big-endian 8 bytes).
- DataExtractor extractor(data, false, 8);
- uint32_t Offset = 0;
- OriginalSize = extractor.getU64(&Offset);
- if (Offset == 0)
- return false;
- data = data.substr(Offset);
- return true;
-}
-
-static bool consumeCompressedZLibHeader(StringRef &Data, uint64_t &OriginalSize,
- bool IsLE, bool Is64Bit) {
- using namespace ELF;
- uint64_t HdrSize = Is64Bit ? sizeof(Elf64_Chdr) : sizeof(Elf32_Chdr);
- if (Data.size() < HdrSize)
- return false;
-
- DataExtractor Extractor(Data, IsLE, 0);
- uint32_t Offset = 0;
- if (Extractor.getUnsigned(&Offset, Is64Bit ? sizeof(Elf64_Word)
- : sizeof(Elf32_Word)) !=
- ELFCOMPRESS_ZLIB)
- return false;
-
- // Skip Elf64_Chdr::ch_reserved field.
- if (Is64Bit)
- Offset += sizeof(Elf64_Word);
-
- OriginalSize = Extractor.getUnsigned(&Offset, Is64Bit ? sizeof(Elf64_Xword)
- : sizeof(Elf32_Word));
- Data = Data.substr(HdrSize);
- return true;
-}
-
-static bool tryDecompress(StringRef &Name, StringRef &Data,
- SmallString<32> &Out, bool ZLibStyle, bool IsLE,
- bool Is64Bit) {
- if (!zlib::isAvailable())
- return false;
-
- uint64_t OriginalSize;
- bool Result =
- ZLibStyle ? consumeCompressedZLibHeader(Data, OriginalSize, IsLE, Is64Bit)
- : consumeCompressedGnuHeader(Data, OriginalSize);
-
- if (!Result || zlib::uncompress(Data, Out, OriginalSize) != zlib::StatusOK)
- return false;
-
- // gnu-style names are started from "z", consume that.
- if (!ZLibStyle)
- Name = Name.substr(1);
- return true;
-}
-
DWARFContextInMemory::DWARFContextInMemory(const object::ObjectFile &Obj,
const LoadedObjectInfo *L)
: IsLittleEndian(Obj.isLittleEndian()),
@@ -676,18 +601,23 @@ DWARFContextInMemory::DWARFContextInMemory(const object::ObjectFile &Obj,
if (!L || !L->getLoadedSectionContents(*RelocatedSection,data))
Section.getContents(data);
- name = name.substr(name.find_first_not_of("._")); // Skip . and _ prefixes.
-
- bool ZLibStyleCompressed = Section.isCompressed();
- if (ZLibStyleCompressed || name.startswith("zdebug_")) {
+ if (Decompressor::isCompressed(Section)) {
+ Expected<Decompressor> Decompressor =
+ Decompressor::create(name, data, IsLittleEndian, AddressSize == 8);
+ if (!Decompressor)
+ continue;
SmallString<32> Out;
- if (!tryDecompress(name, data, Out, ZLibStyleCompressed, IsLittleEndian,
- AddressSize == 8))
+ if (auto Err = Decompressor->decompress(Out))
continue;
UncompressedSections.emplace_back(std::move(Out));
data = UncompressedSections.back();
}
+ // Compressed sections names in GNU style starts from ".z",
+ // at this point section is decompressed and we drop compression prefix.
+ name = name.substr(
+ name.find_first_not_of("._z")); // Skip ".", "z" and "_" prefixes.
+
StringRef *SectionData =
StringSwitch<StringRef *>(name)
.Case("debug_info", &InfoSection.Data)
@@ -718,6 +648,7 @@ DWARFContextInMemory::DWARFContextInMemory(const object::ObjectFile &Obj,
.Case("apple_objc", &AppleObjCSection.Data)
.Case("debug_cu_index", &CUIndexSection)
.Case("debug_tu_index", &TUIndexSection)
+ .Case("gdb_index", &GdbIndexSection)
// Any more debug info sections go here.
.Default(nullptr);
if (SectionData) {
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