/// Load the interesting main binary symbols' addresses into
/// MainBinarySymbolAddresses.
void MachODebugMapParser::loadMainBinarySymbols(
const MachOObjectFile &MainBinary) {
section_iterator Section = MainBinary.section_end();
MainBinarySymbolAddresses.clear();
for (const auto &Sym : MainBinary.symbols()) {
SymbolRef::Type Type = Sym.getType();
// Skip undefined and STAB entries.
if ((Type & SymbolRef::ST_Debug) || (Type & SymbolRef::ST_Unknown))
continue;
// The only symbols of interest are the global variables. These
// are the only ones that need to be queried because the address
// of common data won't be described in the debug map. All other
// addresses should be fetched for the debug map.
if (!(Sym.getFlags() & SymbolRef::SF_Global))
continue;
ErrorOr<section_iterator> SectionOrErr = Sym.getSection();
if (!SectionOrErr)
continue;
Section = *SectionOrErr;
if (Section == MainBinary.section_end() || Section->isText())
continue;
uint64_t Addr = Sym.getValue();
ErrorOr<StringRef> NameOrErr = Sym.getName();
if (!NameOrErr)
continue;
StringRef Name = *NameOrErr;
if (Name.size() == 0 || Name[0] == '\0')
continue;
MainBinarySymbolAddresses[Name] = Addr;
}
}
static char getSymbolNMTypeChar(MachOObjectFile &Obj, basic_symbol_iterator I) {
DataRefImpl Symb = I->getRawDataRefImpl();
uint8_t NType = getNType(Obj, Symb);
switch (NType & MachO::N_TYPE) {
case MachO::N_ABS:
return 's';
case MachO::N_INDR:
return 'i';
case MachO::N_SECT: {
section_iterator Sec = Obj.section_end();
Obj.getSymbolSection(Symb, Sec);
DataRefImpl Ref = Sec->getRawDataRefImpl();
StringRef SectionName;
Obj.getSectionName(Ref, SectionName);
StringRef SegmentName = Obj.getSectionFinalSegmentName(Ref);
if (SegmentName == "__TEXT" && SectionName == "__text")
return 't';
else if (SegmentName == "__DATA" && SectionName == "__data")
return 'd';
else if (SegmentName == "__DATA" && SectionName == "__bss")
return 'b';
else
return 's';
}
}
return '?';
}
/// Load the interesting main binary symbols' addresses into
/// MainBinarySymbolAddresses.
void MachODebugMapParser::loadMainBinarySymbols(
const MachOObjectFile &MainBinary) {
section_iterator Section = MainBinary.section_end();
MainBinarySymbolAddresses.clear();
for (const auto &Sym : MainBinary.symbols()) {
Expected<SymbolRef::Type> TypeOrErr = Sym.getType();
if (!TypeOrErr) {
// TODO: Actually report errors helpfully.
consumeError(TypeOrErr.takeError());
continue;
}
SymbolRef::Type Type = *TypeOrErr;
// Skip undefined and STAB entries.
if ((Type == SymbolRef::ST_Debug) || (Type == SymbolRef::ST_Unknown))
continue;
// The only symbols of interest are the global variables. These
// are the only ones that need to be queried because the address
// of common data won't be described in the debug map. All other
// addresses should be fetched for the debug map.
uint8_t SymType =
MainBinary.getSymbolTableEntry(Sym.getRawDataRefImpl()).n_type;
if (!(SymType & (MachO::N_EXT | MachO::N_PEXT)))
continue;
Expected<section_iterator> SectionOrErr = Sym.getSection();
if (!SectionOrErr) {
// TODO: Actually report errors helpfully.
consumeError(SectionOrErr.takeError());
continue;
}
Section = *SectionOrErr;
if (Section == MainBinary.section_end() || Section->isText())
continue;
uint64_t Addr = Sym.getValue();
Expected<StringRef> NameOrErr = Sym.getName();
if (!NameOrErr) {
// TODO: Actually report errors helpfully.
consumeError(NameOrErr.takeError());
continue;
}
StringRef Name = *NameOrErr;
if (Name.size() == 0 || Name[0] == '\0')
continue;
MainBinarySymbolAddresses[Name] = Addr;
}
}
section_iterator
RuntimeDyldMachO::getSectionByAddress(const MachOObjectFile &Obj,
uint64_t Addr) {
section_iterator SI = Obj.section_begin();
section_iterator SE = Obj.section_end();
for (; SI != SE; ++SI) {
uint64_t SAddr = SI->getAddress();
uint64_t SSize = SI->getSize();
if ((Addr >= SAddr) && (Addr < SAddr + SSize))
return SI;
}
return SE;
}
