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If the bitcode reader input stream isn't a multiple of 4 bytes, it's more 

likely not a bitcode file at all, rather than being a bitcode file which
is truncated. Check for this case and issue a more relevant error message.

llvm-svn: 100156
This commit is contained in:
Dan Gohman 2010-04-02 00:03:51 +00:00
parent d79b4d8173
commit e447aeb9fe
1 changed files with 7 additions and 3 deletions
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10
llvm/lib/Bitcode/Reader/BitcodeReader.cpp
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@ -1527,12 +1527,16 @@ bool BitcodeReader::ParseModule() {
bool BitcodeReader::ParseBitcodeInto(Module *M) {
TheModule = 0;
if (Buffer->getBufferSize() & 3)
return Error("Bitcode stream should be a multiple of 4 bytes in length");
unsigned char *BufPtr = (unsigned char *)Buffer->getBufferStart();
unsigned char *BufEnd = BufPtr+Buffer->getBufferSize();
if (Buffer->getBufferSize() & 3) {
if (!isRawBitcode(BufPtr, BufEnd) && !isBitcodeWrapper(BufPtr, BufEnd))
return Error("Invalid bitcode signature");
else
return Error("Bitcode stream should be a multiple of 4 bytes in length");
}
// If we have a wrapper header, parse it and ignore the non-bc file contents.
// The magic number is 0x0B17C0DE stored in little endian.
if (isBitcodeWrapper(BufPtr, BufEnd))