[PATCH] PR19515, driver crash while handling a clang crash
Robinson, Paul
Paul_Robinson at playstation.sony.com
Mon Apr 28 15:32:08 PDT 2014
r207454, thanks!
--paulr
> -----Original Message-----
> From: Chad Rosier [mailto:mcrosier at codeaurora.org]
> Sent: Monday, April 28, 2014 3:09 PM
> To: Robinson, Paul
> Cc: cfe-commits at cs.uiuc.edu
> Subject: Re: [PATCH] PR19515, driver crash while handling a clang crash
>
> LGTM.
>
> > After a compiler crash (which prints the traceback and so forth),
> > Driver::generateCompilationDiagnostics calls BuildInputs to get a
> > list of inputs to pass to the preprocessor. BuildInputs runs through
> > the command-line arguments. If the original command line included
> > "-lstdc++" this was translated into "-Z-reserved-lib-stdc++" which
> > is marked with options::LinkerInput, so BuildInputs includes it in
> > the list of inputs (treating it kind of like an object file).
> >
> > generateCompilationDiagnostics then wants to filter out inputs the
> > preprocessor doesn't care about. The first thing it does is check
> > for stdin, like so:
> >
> > if (!strcmp(it->second->getValue(), "-"))
> >
> > Sadly, "-Z-reserved-lib-stdc++" is Value-less. The Values are a
> > SmallVector, which in this case is empty, so attempting to retrieve
> > one goes boom.
> >
> > There's another test immediately afterward, which is
> >
> > if (types::getPreprocessedType(it->first) == types::TY_INVALID)
> >
> > and swapping the order of those tests makes the problem go away.
> > --paulr
> >
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>
>
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