#include "llvm-vtabledump.h"
#include "Error.h"
#include "llvm/ADT/ArrayRef.h"
-#include "llvm/ADT/StringMap.h"
#include "llvm/Object/Archive.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/Debug.h"
reportError(Input, EC.message());
}
+static SmallVectorImpl<SectionRef> &getRelocSections(const ObjectFile *Obj,
+ const SectionRef &Sec) {
+ static bool MappingDone = false;
+ static std::map<SectionRef, SmallVector<SectionRef, 1>> SectionRelocMap;
+ if (!MappingDone) {
+ for (const SectionRef &Section : Obj->sections()) {
+ section_iterator Sec2 = Section.getRelocatedSection();
+ if (Sec2 != Obj->section_end())
+ SectionRelocMap[*Sec2].push_back(Section);
+ }
+ MappingDone = true;
+ }
+ return SectionRelocMap[Sec];
+}
+
+static bool collectRelocatedSymbols(const ObjectFile *Obj,
+ const SectionRef &Sec, uint64_t SecAddress,
+ uint64_t SymAddress, uint64_t SymSize,
+ StringRef *I, StringRef *E) {
+ uint64_t SymOffset = SymAddress - SecAddress;
+ uint64_t SymEnd = SymOffset + SymSize;
+ for (const SectionRef &SR : getRelocSections(Obj, Sec)) {
+ for (const object::RelocationRef &Reloc : SR.relocations()) {
+ if (I == E)
+ break;
+ const object::symbol_iterator RelocSymI = Reloc.getSymbol();
+ if (RelocSymI == Obj->symbol_end())
+ continue;
+ StringRef RelocSymName;
+ if (error(RelocSymI->getName(RelocSymName)))
+ return true;
+ uint64_t Offset;
+ if (error(Reloc.getOffset(Offset)))
+ return true;
+ if (Offset >= SymOffset && Offset < SymEnd) {
+ *I = RelocSymName;
+ ++I;
+ }
+ }
+ }
+ return false;
+}
+
+static bool collectRelocationOffsets(
+ const ObjectFile *Obj, const SectionRef &Sec, uint64_t SecAddress,
+ uint64_t SymAddress, uint64_t SymSize, StringRef SymName,
+ std::map<std::pair<StringRef, uint64_t>, StringRef> &Collection) {
+ uint64_t SymOffset = SymAddress - SecAddress;
+ uint64_t SymEnd = SymOffset + SymSize;
+ for (const SectionRef &SR : getRelocSections(Obj, Sec)) {
+ for (const object::RelocationRef &Reloc : SR.relocations()) {
+ const object::symbol_iterator RelocSymI = Reloc.getSymbol();
+ if (RelocSymI == Obj->symbol_end())
+ continue;
+ StringRef RelocSymName;
+ if (error(RelocSymI->getName(RelocSymName)))
+ return true;
+ uint64_t Offset;
+ if (error(Reloc.getOffset(Offset)))
+ return true;
+ if (Offset >= SymOffset && Offset < SymEnd)
+ Collection[std::make_pair(SymName, Offset - SymOffset)] = RelocSymName;
+ }
+ }
+ return false;
+}
+
static void dumpVTables(const ObjectFile *Obj) {
+ struct CompleteObjectLocator {
+ StringRef Symbols[2];
+ ArrayRef<little32_t> Data;
+ };
+ struct ClassHierarchyDescriptor {
+ StringRef Symbols[1];
+ ArrayRef<little32_t> Data;
+ };
+ struct BaseClassDescriptor {
+ StringRef Symbols[2];
+ ArrayRef<little32_t> Data;
+ };
+ struct TypeDescriptor {
+ StringRef Symbols[1];
+ uint64_t AlwaysZero;
+ StringRef MangledName;
+ };
std::map<std::pair<StringRef, uint64_t>, StringRef> VFTableEntries;
- StringMap<ArrayRef<aligned_little32_t>> VBTables;
+ std::map<StringRef, ArrayRef<little32_t>> VBTables;
+ std::map<StringRef, CompleteObjectLocator> COLs;
+ std::map<StringRef, ClassHierarchyDescriptor> CHDs;
+ std::map<std::pair<StringRef, uint64_t>, StringRef> BCAEntries;
+ std::map<StringRef, BaseClassDescriptor> BCDs;
+ std::map<StringRef, TypeDescriptor> TDs;
+
+ std::map<std::pair<StringRef, uint64_t>, StringRef> VTableSymEntries;
+ std::map<std::pair<StringRef, uint64_t>, int64_t> VTableDataEntries;
+ std::map<std::pair<StringRef, uint64_t>, StringRef> VTTEntries;
+ std::map<StringRef, StringRef> TINames;
+
+ uint8_t BytesInAddress = Obj->getBytesInAddress();
+
for (const object::SymbolRef &Sym : Obj->symbols()) {
StringRef SymName;
if (error(Sym.getName(SymName)))
return;
+ object::section_iterator SecI(Obj->section_begin());
+ if (error(Sym.getSection(SecI)))
+ return;
+ // Skip external symbols.
+ if (SecI == Obj->section_end())
+ continue;
+ const SectionRef &Sec = *SecI;
+ // Skip virtual or BSS sections.
+ if (Sec.isBSS() || Sec.isVirtual())
+ continue;
+ StringRef SecContents;
+ if (error(Sec.getContents(SecContents)))
+ return;
+ uint64_t SymAddress, SymSize;
+ if (error(Sym.getAddress(SymAddress)) || error(Sym.getSize(SymSize)))
+ return;
+ uint64_t SecAddress = Sec.getAddress();
+ uint64_t SecSize = Sec.getSize();
+ uint64_t SymOffset = SymAddress - SecAddress;
+ StringRef SymContents = SecContents.substr(SymOffset, SymSize);
+
// VFTables in the MS-ABI start with '??_7' and are contained within their
// own COMDAT section. We then determine the contents of the VFTable by
// looking at each relocation in the section.
if (SymName.startswith("??_7")) {
- object::section_iterator SecI(Obj->section_begin());
- if (error(Sym.getSection(SecI)))
- return;
- if (SecI == Obj->section_end())
- continue;
// Each relocation either names a virtual method or a thunk. We note the
// offset into the section and the symbol used for the relocation.
- for (const object::RelocationRef &Reloc : SecI->relocations()) {
- const object::symbol_iterator RelocSymI = Reloc.getSymbol();
- if (RelocSymI == Obj->symbol_end())
- continue;
- StringRef RelocSymName;
- if (error(RelocSymI->getName(RelocSymName)))
- return;
- uint64_t Offset;
- if (error(Reloc.getOffset(Offset)))
- return;
- VFTableEntries[std::make_pair(SymName, Offset)] = RelocSymName;
- }
+ collectRelocationOffsets(Obj, Sec, SecAddress, SecAddress, SecSize,
+ SymName, VFTableEntries);
}
// VBTables in the MS-ABI start with '??_8' and are filled with 32-bit
// offsets of virtual bases.
else if (SymName.startswith("??_8")) {
- object::section_iterator SecI(Obj->section_begin());
- if (error(Sym.getSection(SecI)))
+ ArrayRef<little32_t> VBTableData(
+ reinterpret_cast<const little32_t *>(SymContents.data()),
+ SymContents.size() / sizeof(little32_t));
+ VBTables[SymName] = VBTableData;
+ }
+ // Complete object locators in the MS-ABI start with '??_R4'
+ else if (SymName.startswith("??_R4")) {
+ CompleteObjectLocator COL;
+ COL.Data = ArrayRef<little32_t>(
+ reinterpret_cast<const little32_t *>(SymContents.data()), 3);
+ StringRef *I = std::begin(COL.Symbols), *E = std::end(COL.Symbols);
+ if (collectRelocatedSymbols(Obj, Sec, SecAddress, SymAddress, SymSize, I,
+ E))
return;
- if (SecI == Obj->section_end())
- continue;
- StringRef SecContents;
- if (error(SecI->getContents(SecContents)))
+ COLs[SymName] = COL;
+ }
+ // Class hierarchy descriptors in the MS-ABI start with '??_R3'
+ else if (SymName.startswith("??_R3")) {
+ ClassHierarchyDescriptor CHD;
+ CHD.Data = ArrayRef<little32_t>(
+ reinterpret_cast<const little32_t *>(SymContents.data()), 3);
+ StringRef *I = std::begin(CHD.Symbols), *E = std::end(CHD.Symbols);
+ if (collectRelocatedSymbols(Obj, Sec, SecAddress, SymAddress, SymSize, I,
+ E))
return;
-
- ArrayRef<aligned_little32_t> VBTableData(
- reinterpret_cast<const aligned_little32_t *>(SecContents.data()),
- SecContents.size() / sizeof(aligned_little32_t));
- VBTables[SymName] = VBTableData;
+ CHDs[SymName] = CHD;
+ }
+ // Class hierarchy descriptors in the MS-ABI start with '??_R2'
+ else if (SymName.startswith("??_R2")) {
+ // Each relocation names a base class descriptor. We note the offset into
+ // the section and the symbol used for the relocation.
+ collectRelocationOffsets(Obj, Sec, SecAddress, SymAddress, SymSize,
+ SymName, BCAEntries);
+ }
+ // Base class descriptors in the MS-ABI start with '??_R1'
+ else if (SymName.startswith("??_R1")) {
+ BaseClassDescriptor BCD;
+ BCD.Data = ArrayRef<little32_t>(
+ reinterpret_cast<const little32_t *>(SymContents.data()) + 1, 5);
+ StringRef *I = std::begin(BCD.Symbols), *E = std::end(BCD.Symbols);
+ if (collectRelocatedSymbols(Obj, Sec, SecAddress, SymAddress, SymSize, I,
+ E))
+ return;
+ BCDs[SymName] = BCD;
+ }
+ // Type descriptors in the MS-ABI start with '??_R0'
+ else if (SymName.startswith("??_R0")) {
+ const char *DataPtr = SymContents.drop_front(BytesInAddress).data();
+ TypeDescriptor TD;
+ if (BytesInAddress == 8)
+ TD.AlwaysZero = *reinterpret_cast<const little64_t *>(DataPtr);
+ else
+ TD.AlwaysZero = *reinterpret_cast<const little32_t *>(DataPtr);
+ TD.MangledName = SymContents.drop_front(BytesInAddress * 2);
+ StringRef *I = std::begin(TD.Symbols), *E = std::end(TD.Symbols);
+ if (collectRelocatedSymbols(Obj, Sec, SecAddress, SymAddress, SymSize, I,
+ E))
+ return;
+ TDs[SymName] = TD;
+ }
+ // Construction vtables in the Itanium ABI start with '_ZTT' or '__ZTT'.
+ else if (SymName.startswith("_ZTT") || SymName.startswith("__ZTT")) {
+ collectRelocationOffsets(Obj, Sec, SecAddress, SymAddress, SymSize,
+ SymName, VTTEntries);
+ }
+ // Typeinfo names in the Itanium ABI start with '_ZTS' or '__ZTS'.
+ else if (SymName.startswith("_ZTS") || SymName.startswith("__ZTS")) {
+ TINames[SymName] = SymContents.slice(0, SymContents.find('\0'));
+ }
+ // Vtables in the Itanium ABI start with '_ZTV' or '__ZTV'.
+ else if (SymName.startswith("_ZTV") || SymName.startswith("__ZTV")) {
+ collectRelocationOffsets(Obj, Sec, SecAddress, SymAddress, SymSize,
+ SymName, VTableSymEntries);
+ for (uint64_t SymOffI = 0; SymOffI < SymSize; SymOffI += BytesInAddress) {
+ auto Key = std::make_pair(SymName, SymOffI);
+ if (VTableSymEntries.count(Key))
+ continue;
+ const char *DataPtr = SymContents.substr(SymOffI, BytesInAddress).data();
+ int64_t VData;
+ if (BytesInAddress == 8)
+ VData = *reinterpret_cast<const little64_t *>(DataPtr);
+ else
+ VData = *reinterpret_cast<const little32_t *>(DataPtr);
+ VTableDataEntries[Key] = VData;
+ }
+ }
+ // Typeinfo structures in the Itanium ABI start with '_ZTI' or '__ZTI'.
+ else if (SymName.startswith("_ZTI") || SymName.startswith("__ZTI")) {
+ // FIXME: Do something with these!
}
}
- for (
- const std::pair<std::pair<StringRef, uint64_t>, StringRef> &VFTableEntry :
- VFTableEntries) {
+ for (const std::pair<std::pair<StringRef, uint64_t>, StringRef> &VFTableEntry :
+ VFTableEntries) {
StringRef VFTableName = VFTableEntry.first.first;
uint64_t Offset = VFTableEntry.first.second;
StringRef SymName = VFTableEntry.second;
outs() << VFTableName << '[' << Offset << "]: " << SymName << '\n';
}
- for (const StringMapEntry<ArrayRef<aligned_little32_t>> &VBTable : VBTables) {
- StringRef VBTableName = VBTable.getKey();
+ for (const std::pair<StringRef, ArrayRef<little32_t>> &VBTable : VBTables) {
+ StringRef VBTableName = VBTable.first;
uint32_t Idx = 0;
- for (aligned_little32_t Offset : VBTable.getValue()) {
+ for (little32_t Offset : VBTable.second) {
outs() << VBTableName << '[' << Idx << "]: " << Offset << '\n';
- Idx += sizeof(aligned_little32_t);
+ Idx += sizeof(Offset);
+ }
+ }
+ for (const std::pair<StringRef, CompleteObjectLocator> &COLPair : COLs) {
+ StringRef COLName = COLPair.first;
+ const CompleteObjectLocator &COL = COLPair.second;
+ outs() << COLName << "[IsImageRelative]: " << COL.Data[0] << '\n';
+ outs() << COLName << "[OffsetToTop]: " << COL.Data[1] << '\n';
+ outs() << COLName << "[VFPtrOffset]: " << COL.Data[2] << '\n';
+ outs() << COLName << "[TypeDescriptor]: " << COL.Symbols[0] << '\n';
+ outs() << COLName << "[ClassHierarchyDescriptor]: " << COL.Symbols[1] << '\n';
+ }
+ for (const std::pair<StringRef, ClassHierarchyDescriptor> &CHDPair : CHDs) {
+ StringRef CHDName = CHDPair.first;
+ const ClassHierarchyDescriptor &CHD = CHDPair.second;
+ outs() << CHDName << "[AlwaysZero]: " << CHD.Data[0] << '\n';
+ outs() << CHDName << "[Flags]: " << CHD.Data[1] << '\n';
+ outs() << CHDName << "[NumClasses]: " << CHD.Data[2] << '\n';
+ outs() << CHDName << "[BaseClassArray]: " << CHD.Symbols[0] << '\n';
+ }
+ for (const std::pair<std::pair<StringRef, uint64_t>, StringRef> &BCAEntry :
+ BCAEntries) {
+ StringRef BCAName = BCAEntry.first.first;
+ uint64_t Offset = BCAEntry.first.second;
+ StringRef SymName = BCAEntry.second;
+ outs() << BCAName << '[' << Offset << "]: " << SymName << '\n';
+ }
+ for (const std::pair<StringRef, BaseClassDescriptor> &BCDPair : BCDs) {
+ StringRef BCDName = BCDPair.first;
+ const BaseClassDescriptor &BCD = BCDPair.second;
+ outs() << BCDName << "[TypeDescriptor]: " << BCD.Symbols[0] << '\n';
+ outs() << BCDName << "[NumBases]: " << BCD.Data[0] << '\n';
+ outs() << BCDName << "[OffsetInVBase]: " << BCD.Data[1] << '\n';
+ outs() << BCDName << "[VBPtrOffset]: " << BCD.Data[2] << '\n';
+ outs() << BCDName << "[OffsetInVBTable]: " << BCD.Data[3] << '\n';
+ outs() << BCDName << "[Flags]: " << BCD.Data[4] << '\n';
+ outs() << BCDName << "[ClassHierarchyDescriptor]: " << BCD.Symbols[1] << '\n';
+ }
+ for (const std::pair<StringRef, TypeDescriptor> &TDPair : TDs) {
+ StringRef TDName = TDPair.first;
+ const TypeDescriptor &TD = TDPair.second;
+ outs() << TDName << "[VFPtr]: " << TD.Symbols[0] << '\n';
+ outs() << TDName << "[AlwaysZero]: " << TD.AlwaysZero << '\n';
+ outs() << TDName << "[MangledName]: ";
+ outs().write_escaped(TD.MangledName.rtrim(StringRef("\0", 1)),
+ /*UseHexEscapes=*/true)
+ << '\n';
+ }
+ for (const std::pair<std::pair<StringRef, uint64_t>, StringRef> &VTTPair :
+ VTTEntries) {
+ StringRef VTTName = VTTPair.first.first;
+ uint64_t VTTOffset = VTTPair.first.second;
+ StringRef VTTEntry = VTTPair.second;
+ outs() << VTTName << '[' << VTTOffset << "]: " << VTTEntry << '\n';
+ }
+ for (const std::pair<StringRef, StringRef> &TIPair : TINames) {
+ StringRef TIName = TIPair.first;
+ outs() << TIName << ": " << TIPair.second << '\n';
+ }
+ auto VTableSymI = VTableSymEntries.begin();
+ auto VTableSymE = VTableSymEntries.end();
+ auto VTableDataI = VTableDataEntries.begin();
+ auto VTableDataE = VTableDataEntries.end();
+ for (;;) {
+ bool SymDone = VTableSymI == VTableSymE;
+ bool DataDone = VTableDataI == VTableDataE;
+ if (SymDone && DataDone)
+ break;
+ if (!SymDone && (DataDone || VTableSymI->first < VTableDataI->first)) {
+ StringRef VTableName = VTableSymI->first.first;
+ uint64_t Offset = VTableSymI->first.second;
+ StringRef VTableEntry = VTableSymI->second;
+ outs() << VTableName << '[' << Offset << "]: ";
+ outs() << VTableEntry;
+ outs() << '\n';
+ ++VTableSymI;
+ continue;
+ }
+ if (!DataDone && (SymDone || VTableDataI->first < VTableSymI->first)) {
+ StringRef VTableName = VTableDataI->first.first;
+ uint64_t Offset = VTableDataI->first.second;
+ int64_t VTableEntry = VTableDataI->second;
+ outs() << VTableName << '[' << Offset << "]: ";
+ outs() << VTableEntry;
+ outs() << '\n';
+ ++VTableDataI;
+ continue;
}
}
}
static void dumpArchive(const Archive *Arc) {
- for (Archive::child_iterator ArcI = Arc->child_begin(),
- ArcE = Arc->child_end();
- ArcI != ArcE; ++ArcI) {
- ErrorOr<std::unique_ptr<Binary>> ChildOrErr = ArcI->getAsBinary();
+ for (const Archive::Child &ArcC : Arc->children()) {
+ ErrorOr<std::unique_ptr<Binary>> ChildOrErr = ArcC.getAsBinary();
if (std::error_code EC = ChildOrErr.getError()) {
// Ignore non-object files.
if (EC != object_error::invalid_file_type)
}
// Attempt to open the binary.
- ErrorOr<Binary *> BinaryOrErr = createBinary(File);
+ ErrorOr<OwningBinary<Binary>> BinaryOrErr = createBinary(File);
if (std::error_code EC = BinaryOrErr.getError()) {
reportError(File, EC);
return;
}
- std::unique_ptr<Binary> Binary(BinaryOrErr.get());
+ Binary &Binary = *BinaryOrErr.get().getBinary();
- if (Archive *Arc = dyn_cast<Archive>(Binary.get()))
+ if (Archive *Arc = dyn_cast<Archive>(&Binary))
dumpArchive(Arc);
- else if (ObjectFile *Obj = dyn_cast<ObjectFile>(Binary.get()))
+ else if (ObjectFile *Obj = dyn_cast<ObjectFile>(&Binary))
dumpVTables(Obj);
else
reportError(File, vtabledump_error::unrecognized_file_format);
projects / oota-llvm.git / blobdiff