[LLVMdev] changes to raw_fd_ostream

Ryan Taylor ryta1203 at gmail.com
Fri Oct 26 15:27:56 PDT 2012

It looks like some kind of file IO buffer overflow. I'm not dumping any
long strings at one time, but I am keeping the file open for the entire
run. I've yet to find a correlation to other C files.

On Fri, Oct 26, 2012 at 3:17 PM, Ryan Taylor <ryta1203 at gmail.com> wrote:

> I'm getting seemingly odd SegFaults  when writing out using a
> raw_fd_ostream in the current trunk (last version worked, believe it was
> 153818, or similar). Again, nothing in the release notes... should I be
> scanning the svn log?
> For example, I have something like:
> raw_fd_ostream fout("out.txt", errorStr="");
> ....
> fout<<"Hello World, how are you!"\n";
> and it'll write out to the file, "Hello Wor" and then seg fault without
> assert.
> Sadly, this only happens for certain C code, any idea why this might be
> occuring?
> Also, during build I get a lot of these warnings:llvm/ADT/DenseMap.h: In
> copy constructor ‘llvm::DenseMap<KeyT, ValueT, KeyInfoT>::DenseMap(const
> llvm::DenseMap<KeyT, ValueT, KeyInfoT>&) [with KeyT = unsigned int, ValueT
> = llvm::PointerAlignElem, KeyInfoT = llvm::DenseMapInfo<unsigned int>]’:
> I'm guessing I messed up when updating somehow? I just used gmake update.
> Thanks.
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