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Rewrite DIContext interface to take an object. Update all callers.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167757 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher
2012-11-12 21:40:38 +00:00
parent f4e3309e84
commit d1726a4580
8 changed files with 116 additions and 264 deletions
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80
lib/DebugInfo/DWARFContext.cpp
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@ -298,4 +298,84 @@ DIInliningInfo DWARFContext::getInliningInfoForAddress(uint64_t Address,
return InliningInfo;
}
DWARFContextInMemory::DWARFContextInMemory(object::ObjectFile *Obj) :
IsLittleEndian(true /* FIXME */) {
error_code ec;
for (object::section_iterator i = Obj->begin_sections(),
e = Obj->end_sections();
i != e; i.increment(ec)) {
StringRef name;
i->getName(name);
StringRef data;
i->getContents(data);
if (name.startswith("__DWARF,"))
name = name.substr(8); // Skip "__DWARF," prefix.
name = name.substr(name.find_first_not_of("._")); // Skip . and _ prefixes.
if (name == "debug_info")
InfoSection = data;
else if (name == "debug_abbrev")
AbbrevSection = data;
else if (name == "debug_line")
LineSection = data;
else if (name == "debug_aranges")
ARangeSection = data;
else if (name == "debug_str")
StringSection = data;
else if (name == "debug_ranges")
RangeSection = data;
// Any more debug info sections go here.
else
continue;
// TODO: For now only handle relocations for the debug_info section.
if (name != "debug_info")
continue;
if (i->begin_relocations() != i->end_relocations()) {
uint64_t SectionSize;
i->getSize(SectionSize);
for (object::relocation_iterator reloc_i = i->begin_relocations(),
reloc_e = i->end_relocations();
reloc_i != reloc_e; reloc_i.increment(ec)) {
uint64_t Address;
reloc_i->getAddress(Address);
uint64_t Type;
reloc_i->getType(Type);
object::RelocVisitor V(Obj->getFileFormatName());
// The section address is always 0 for debug sections.
object::RelocToApply R(V.visit(Type, *reloc_i));
if (V.error()) {
SmallString<32> Name;
error_code ec(reloc_i->getTypeName(Name));
if (ec) {
errs() << "Aaaaaa! Nameless relocation! Aaaaaa!\n";
}
errs() << "error: failed to compute relocation: "
<< Name << "\n";
continue;
}
if (Address + R.Width > SectionSize) {
errs() << "error: " << R.Width << "-byte relocation starting "
<< Address << " bytes into section " << name << " which is "
<< SectionSize << " bytes long.\n";
continue;
}
if (R.Width > 8) {
errs() << "error: can't handle a relocation of more than 8 bytes at "
"a time.\n";
continue;
}
DEBUG(dbgs() << "Writing " << format("%p", R.Value)
<< " at " << format("%p", Address)
<< " with width " << format("%d", R.Width)
<< "\n");
RelocMap[Address] = std::make_pair(R.Width, R.Value);
}
}
}
}
void DWARFContextInMemory::anchor() { }