Support generating crash reports.

[llvmbot]

Bugzilla Link	4491
Resolution	FIXED
Resolved on	Jun 13, 2012 13:23
Version	unspecified
OS	All
Reporter	LLVM Bugzilla Contributor

Extended Description

The clang driver should support generating crash reports, to aid development and help users in providing useful feedback.

This is what I envision:

1. Accept options like -fcrash-report and -fcrash-report=always.

2. When the driver detects a command failure it attempts to generate a crash report. If -fcrash-report is given instead of -fcrash-report=always then it only does this for "abnormal failures".

3. Crash reports are generated by creating a new directory in /tmp such as
   /tmp/clang-crashreport-X386ysd
   which would have the following contents:
   a) Contextual information like the environment, path, command line arguments, operating system, versions, etc.
   b) The inputs to the driver.
   c) The temporary results of the compilation, essentially this is -save-temps if the command is rerun on the inputs inside the crash report directory. The crash report function obviously should notice if the compilation succeeds when it tries to reproduce it.

4. Provide optional support for reducing the crash report. In general this is probably better done by a clang developer, but reducing the crash report on the client side would solve some problems where the user doesn't want to submit as much data as is in a generic crash report.

5. Optional autosubmit is overkill. Sweet sweet productivity enhancing overkill.

[llvmbot]

I wrote up a proposal for this here:
http://lists.cs.uiuc.edu/pipermail/cfe-dev/2010-July/009903.html

[llvmbot]

*** Bug #4621 has been marked as a duplicate of this bug. ***

[chandlerc]

I think Chad has implemented this. Further issues w.r.t. crash reporting should
be new bugs.