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Fix some minor issues in PDB parsing library.

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1) Until now I'd never seen a valid PDB where the DBI stream and
   the PDB Stream disagreed on the "Age" field.  Because of that,
   we had code to assert that they matched.  Recently though I was
   given a PDB where they disagreed, so this assumption has proven
   to be incorrect.  Remove this check.

2) We were walking the entire list of hash values for types up front
   and then throwing away the values.  For large PDBs this was a
   significant slow down.  Remove this.

With this patch, I can dump the list of all compilands from a
1.5GB PDB file in just a few seconds.

llvm-svn: 303351
This commit is contained in:
Zachary Turner 2017-05-18 15:14:44 +00:00
parent 43ed7e1bbe
commit 1a1eb3534c
2 changed files with 0 additions and 11 deletions
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8
lib/DebugInfo/PDB/Native/DbiStream.cpp
View File

@ -72,14 +72,6 @@ Error DbiStream::reload() {
return make_error<RawError>(raw_error_code::feature_unsupported,
"Unsupported DBI version.");
auto IS = Pdb.getPDBInfoStream();
if (!IS)
return IS.takeError();
if (Header->Age != IS->getAge())
return make_error<RawError>(raw_error_code::corrupt_file,
"DBI Age does not match PDB Age.");
if (Stream->getLength() !=
sizeof(DbiStreamHeader) + Header->ModiSubstreamSize +
Header->SecContrSubstreamSize + Header->SectionMapSize +

3
lib/DebugInfo/PDB/Native/TpiStream.cpp
View File

@ -91,9 +91,6 @@ Error TpiStream::reload() {
HSR.setOffset(Header->HashValueBuffer.Off);
if (auto EC = HSR.readArray(HashValues, NumHashValues))
return EC;
std::vector<ulittle32_t> HashValueList;
for (auto I : HashValues)
HashValueList.push_back(I);
HSR.setOffset(Header->IndexOffsetBuffer.Off);
uint32_t NumTypeIndexOffsets =