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[modules] If loading a .pcm file would cause us to run out of source locations, attempt to fail more gracefully. (No test; this requires >= 4GB of preprocessed input...)

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llvm-svn: 244822
This commit is contained in:
Richard Smith
2015-08-12 22:25:24 +00:00
parent 971dc3a82a
commit 78d81ecfc3
2 changed files with 7 additions and 1 deletions
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4
clang/lib/Basic/SourceManager.cpp
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@@ -484,10 +484,12 @@ std::pair<int, unsigned>
SourceManager::AllocateLoadedSLocEntries(unsigned NumSLocEntries,
unsigned TotalSize) {
assert(ExternalSLocEntries && "Don't have an external sloc source");
// Make sure we're not about to run out of source locations.
if (CurrentLoadedOffset - TotalSize < NextLocalOffset)
return std::make_pair(0, 0);
LoadedSLocEntryTable.resize(LoadedSLocEntryTable.size() + NumSLocEntries);
SLocEntryLoaded.resize(LoadedSLocEntryTable.size());
CurrentLoadedOffset -= TotalSize;
assert(CurrentLoadedOffset >= NextLocalOffset && "Out of source locations");
int ID = LoadedSLocEntryTable.size();
return std::make_pair(-ID - 1, CurrentLoadedOffset);
}