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Verify sizes when trying to read a VBR

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Also added an assert to ReadVBR64.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234984 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Filipe Cabecinhas
2015-04-15 08:48:08 +00:00
parent dc374b5eb4
commit 4c0055402f
4 changed files with 8 additions and 0 deletions
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2
lib/Bitcode/Reader/BitstreamReader.cpp
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@ -62,6 +62,8 @@ static uint64_t readAbbreviatedField(BitstreamCursor &Cursor,
case BitCodeAbbrevOp::Fixed:
return Cursor.Read((unsigned)Op.getEncodingData());
case BitCodeAbbrevOp::VBR:
if ((unsigned)Op.getEncodingData() > 64)
report_fatal_error("Invalid record");
return Cursor.ReadVBR64((unsigned)Op.getEncodingData());
case BitCodeAbbrevOp::Char6:
return BitCodeAbbrevOp::DecodeChar6(Cursor.Read(6));