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llvm-dwp: Pull out compression handling helper 

llvm-svn: 270496
This commit is contained in:
David Blaikie 2016-05-23 21:58:58 +00:00
parent 9c81d0fdeb
commit 05e0d2bf59
1 changed files with 22 additions and 15 deletions
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37
llvm/tools/llvm-dwp/llvm-dwp.cpp
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@ -359,6 +359,25 @@ std::string buildDWODescription(StringRef Name, StringRef DWPName, StringRef DWO
return Text;
}
static Error handleCompressedSection(
SmallVector<SmallString<32>, 4> &UncompressedSections, StringRef &Name,
StringRef &Contents) {
if (!Name.startswith("zdebug_"))
return Error();
UncompressedSections.emplace_back();
uint64_t OriginalSize;
if (!zlib::isAvailable())
return make_error<DWPError>("zlib not available");
if (!consumeCompressedDebugSectionHeader(Contents, OriginalSize) ||
zlib::uncompress(Contents, UncompressedSections.back(), OriginalSize) !=
zlib::StatusOK)
return make_error<DWPError>(
("failure while decompressing compressed section: '" + Name + "\'")
.str());
Name = Name.substr(1);
Contents = UncompressedSections.back();
return Error();
}
Error buildDuplicateError(const std::pair<uint64_t, UnitIndexEntry> &PrevE,
const CompileUnitIdentifiers &ID, StringRef DWPName) {
return make_error<DWPError>(
@ -431,21 +450,9 @@ static Error write(MCStreamer &Out, ArrayRef<std::string> Inputs) {
if (auto Err = Section.getContents(Contents))
return errorCodeToError(Err);
if (Name.startswith("zdebug_")) {
UncompressedSections.emplace_back();
uint64_t OriginalSize;
if (!zlib::isAvailable())
return make_error<DWPError>("zlib not available");
if (!consumeCompressedDebugSectionHeader(Contents, OriginalSize) ||
zlib::uncompress(Contents, UncompressedSections.back(),
OriginalSize) != zlib::StatusOK)
return make_error<DWPError>(
("failure while decompressing compressed section: '" + Name +
"\'")
.str());
Name = Name.substr(1);
Contents = UncompressedSections.back();
}
if (auto Err =
handleCompressedSection(UncompressedSections, Name, Contents))
return Err;
auto SectionPair = KnownSections.find(Name);
if (SectionPair == KnownSections.end())