[llvm] r273504 - [pdb] Treat a stream size of ~0U as 0

[Reid Kleckner via llvm-commits]

Author: rnk
Date: Wed Jun 22 17:42:24 2016
New Revision: 273504

URL: http://llvm.org/viewvc/llvm-project?rev=273504&view=rev
Log:
[pdb] Treat a stream size of ~0U as 0

My PDBs always have this size for stream 11. Not sure why.

Modified:
    llvm/trunk/lib/DebugInfo/PDB/Raw/PDBFile.cpp

Modified: llvm/trunk/lib/DebugInfo/PDB/Raw/PDBFile.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/DebugInfo/PDB/Raw/PDBFile.cpp?rev=273504&r1=273503&r2=273504&view=diff
==============================================================================
--- llvm/trunk/lib/DebugInfo/PDB/Raw/PDBFile.cpp (original)
+++ llvm/trunk/lib/DebugInfo/PDB/Raw/PDBFile.cpp Wed Jun 22 17:42:24 2016
@@ -171,8 +171,10 @@ Error PDBFile::parseStreamData() {
   if (auto EC = Reader.readArray(StreamSizes, NumStreams))
     return EC;
   for (uint32_t I = 0; I < NumStreams; ++I) {
+    uint32_t StreamSize = getStreamByteSize(I);
+    // FIXME: What does StreamSize ~0U mean?
     uint64_t NumExpectedStreamBlocks =
-        bytesToBlocks(getStreamByteSize(I), SB->BlockSize);
+        StreamSize == UINT32_MAX ? 0 : bytesToBlocks(StreamSize, SB->BlockSize);
 
     // For convenience, we store the block array contiguously.  This is because
     // if someone calls setStreamMap(), it is more convenient to be able to call
@@ -331,4 +333,4 @@ void PDBFile::setStreamMap(ArrayRef<Arra
   StreamMap = Blocks;
 }
 
-void PDBFile::commit() {}
\ No newline at end of file
+void PDBFile::commit() {}