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Add a sanity check in MemoryBuffer::getOpenFile() to make sure we don't hang

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if the passed in FileSize is inaccurate.

rdar://11034179

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152662 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Argyrios Kyrtzidis 2012-03-13 20:18:42 +00:00
parent e4c972d864
commit b9153bacd0
1 changed files with 5 additions and 1 deletions
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6
lib/Support/MemoryBuffer.cpp
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@ -336,7 +336,11 @@ error_code MemoryBuffer::getOpenFile(int FD, const char *Filename,
// Error while reading. // Error while reading.
return error_code(errno, posix_category()); return error_code(errno, posix_category());
} }
assert(NumRead != 0 && "fstat reported an invalid file size."); if (NumRead == 0) {
assert(0 && "We got inaccurate FileSize value or fstat reported an "
"invalid file size.");
break;
}
BytesLeft -= NumRead; BytesLeft -= NumRead;
BufPtr += NumRead; BufPtr += NumRead;
} }