[cfe-commits] r156079 - /cfe/trunk/lib/Driver/Driver.cpp

Chad Rosier mcrosier at apple.com
Thu May 3 12:10:06 PDT 2012

On May 3, 2012, at 11:10 AM, Chandler Carruth wrote:

> On Thu, May 3, 2012 at 10:47 AM, Chad Rosier <mcrosier at apple.com> wrote:
> On May 3, 2012, at 10:37 AM, Chandler Carruth wrote:
>> On Thu, May 3, 2012 at 10:07 AM, Chad Rosier <mcrosier at apple.com> wrote:
>> Author: mcrosier
>> Date: Thu May  3 12:07:55 2012
>> New Revision: 156079
>> URL: http://llvm.org/viewvc/llvm-project?rev=156079&view=rev
>> Log:
>> [driver crash diagnostics] Remove more flags that reference absolute paths that
>> aren't necessary to reproduce the clang crash.
>> Out of curiosity, is it easy to test this by triggering a crash in the test suite, and then FileCheck-ing the resulting repro stuff?
> In r155205 (http://llvm.org/viewvc/llvm-project?view=rev&revision=155205) I added a simple hack to cause the compiler to crash on demand.  We could add a test case to cause a crash, but what were checking is the contents of the generated script file, which has a non-deterministic name.  You'd have to grep the name from the clang output and then FileCheck the output script.  Doesn't sound too difficult, but since this is off the critical path I honestly haven't spent a lot of time trying to get that to work.  I can do so if you (or whoever) really think it's necessary.
> It's not a big deal... I was more thinking if we're going to keep tweaking this, maybe we should get some testing coverage of it.

I expect the noise to die down shortly, but test cases are never a bad thing.

> If you're interested in testing it, I would just add an environment variable much like the one you added to force the crash (maybe the same one?) that forces the output to a particular location.

I like this idea.

> Actually, now that I think about it, I have a very distinct use case for exactly such an environment variable... maybe I can write up a patch and send it your way?

Sounds good to me.  Thanks, Chandler.

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