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[llvm-readobj] - Refactor the code.

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It's a straightforward refactoring that allows to simplify and encapsulate the code.

Differential revision: https://reviews.llvm.org/D67624

llvm-svn: 372083
This commit is contained in:
George Rimar 2019-09-17 08:53:18 +00:00
parent 88eb61f790
commit 008671759e
2 changed files with 26 additions and 39 deletions
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4
include/llvm/Object/ELFObjectFile.h
View File

@ -239,6 +239,10 @@ public:
using Elf_Rela = typename ELFT::Rela;
using Elf_Dyn = typename ELFT::Dyn;
SectionRef toSectionRef(const Elf_Shdr *Sec) const {
return SectionRef(toDRI(Sec), this);
}
private:
ELFObjectFile(MemoryBufferRef Object, ELFFile<ELFT> EF,
const Elf_Shdr *DotDynSymSec, const Elf_Shdr *DotSymtabSec,

61
tools/llvm-readobj/ELFDumper.cpp
View File

@ -4749,11 +4749,14 @@ void DumpStyle<ELFT>::printStackSize(const ELFObjectFile<ELFT> *Obj,
Data, &Offset);
}
template <class ELFT>
SectionRef toSectionRef(const ObjectFile *Obj, const typename ELFT::Shdr *Sec) {
DataRefImpl DRI;
DRI.p = reinterpret_cast<uintptr_t>(Sec);
return SectionRef(DRI, Obj);
// Used for printing section names in places where possible errors can be
// ignored.
static StringRef getSectionName(const SectionRef &Sec) {
Expected<StringRef> NameOrErr = Sec.getName();
if (NameOrErr)
return *NameOrErr;
consumeError(NameOrErr.takeError());
return "<?>";
}
template <class ELFT>
@ -4764,16 +4767,11 @@ void DumpStyle<ELFT>::printNonRelocatableStackSizes(
const ELFFile<ELFT> *EF = Obj->getELFFile();
StringRef FileStr = Obj->getFileName();
for (const SectionRef &Sec : Obj->sections()) {
StringRef SectionName;
if (Expected<StringRef> NameOrErr = Sec.getName())
SectionName = *NameOrErr;
else
consumeError(NameOrErr.takeError());
const Elf_Shdr *ElfSec = Obj->getSection(Sec.getRawDataRefImpl());
StringRef SectionName = getSectionName(Sec);
if (!SectionName.startswith(".stack_sizes"))
continue;
PrintHeader();
const Elf_Shdr *ElfSec = Obj->getSection(Sec.getRawDataRefImpl());
ArrayRef<uint8_t> Contents =
unwrapOrError(this->FileName, EF->getSectionContents(ElfSec));
DataExtractor Data(
@ -4798,8 +4796,7 @@ void DumpStyle<ELFT>::printNonRelocatableStackSizes(
FileStr);
}
uint64_t SymValue = Data.getAddress(&Offset);
printFunctionStackSize(Obj, SymValue,
toSectionRef<ELFT>(Obj, FunctionELFSec),
printFunctionStackSize(Obj, SymValue, Obj->toSectionRef(FunctionELFSec),
SectionName, Data, &Offset);
}
}
@ -4848,7 +4845,7 @@ void DumpStyle<ELFT>::printRelocatableStackSizes(
if (!ContentsSectionNameOrErr->startswith(".stack_sizes"))
continue;
// Insert a mapping from the stack sizes section to its relocation section.
StackSizeRelocMap[toSectionRef<ELFT>(Obj, ContentsSec)] = Sec;
StackSizeRelocMap[Obj->toSectionRef(ContentsSec)] = Sec;
}
for (const auto &StackSizeMapEntry : StackSizeRelocMap) {
@ -4857,12 +4854,7 @@ void DumpStyle<ELFT>::printRelocatableStackSizes(
const SectionRef &RelocSec = StackSizeMapEntry.second;
// Warn about stack size sections without a relocation section.
StringRef StackSizeSectionName;
if (Expected<StringRef> NameOrErr = StackSizesSec.getName())
StackSizeSectionName = *NameOrErr;
else
consumeError(NameOrErr.takeError());
StringRef StackSizeSectionName = getSectionName(StackSizesSec);
if (RelocSec == NullSection) {
reportWarning(createError("section " + StackSizeSectionName +
" does not have a corresponding "
@ -4876,9 +4868,8 @@ void DumpStyle<ELFT>::printRelocatableStackSizes(
// described in it.
const Elf_Shdr *StackSizesELFSec =
Obj->getSection(StackSizesSec.getRawDataRefImpl());
const SectionRef FunctionSec = toSectionRef<ELFT>(
Obj, unwrapOrError(this->FileName,
EF->getSection(StackSizesELFSec->sh_link)));
const SectionRef FunctionSec = Obj->toSectionRef(unwrapOrError(
this->FileName, EF->getSection(StackSizesELFSec->sh_link)));
bool (*IsSupportedFn)(uint64_t);
RelocationResolver Resolver;
@ -4889,21 +4880,13 @@ void DumpStyle<ELFT>::printRelocatableStackSizes(
Contents.size()),
Obj->isLittleEndian(), sizeof(Elf_Addr));
for (const RelocationRef &Reloc : RelocSec.relocations()) {
if (!IsSupportedFn(Reloc.getType())) {
StringRef RelocSectionName;
Expected<StringRef> NameOrErr = RelocSec.getName();
if (NameOrErr)
RelocSectionName = *NameOrErr;
else
consumeError(NameOrErr.takeError());
StringRef RelocName = EF->getRelocationTypeName(Reloc.getType());
reportError(
createStringError(object_error::parse_failed,
"unsupported relocation type in section %s: %s",
RelocSectionName.data(), RelocName.data()),
Obj->getFileName());
}
if (!IsSupportedFn(Reloc.getType()))
reportError(createStringError(
object_error::parse_failed,
"unsupported relocation type in section %s: %s",
getSectionName(RelocSec).data(),
EF->getRelocationTypeName(Reloc.getType()).data()),
Obj->getFileName());
this->printStackSize(Obj, Reloc, FunctionSec, StackSizeSectionName,
Resolver, Data);
}