[GHC] #13108: Improve poor Access Violation reporting on Windows

[GHC]

#13108: Improve poor Access Violation reporting on Windows
-------------------------------------+-------------------------------------
        Reporter:  awson             |                Owner:
            Type:  task              |               Status:  patch
        Priority:  normal            |            Milestone:
       Component:  Runtime System    |              Version:
      Resolution:                    |             Keywords:
Operating System:  Windows           |         Architecture:
 Type of failure:  Poor/confusing    |  Unknown/Multiple
  error message                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D2969
       Wiki Page:                    |
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Comment (by Ryan Scott <ryan.gl.scott@…>):

 In [changeset:"c13151e5ac774d38d7c5a807692851022c18fe6b/ghc" c13151e/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="c13151e5ac774d38d7c5a807692851022c18fe6b"
 Improve access violation reporting on Windows

 Summary:
 This patch is courtesy of @awson.

 Currently, whenever GHC catches a segfault on Windows, it simply reports
 the
 somewhat uninformative message
 `Segmentation fault/access violation in generated code`. This patch adds
 to
 the message the type of violation (read/write/dep) and location
 information,
 which should help debugging segfaults in the future.

 Fixes #13108.

 Test Plan: Build on Windows

 Reviewers: austin, erikd, bgamari, simonmar, Phyx

 Reviewed By: bgamari, Phyx

 Subscribers: awson, thomie, #ghc_windows_task_force

 Differential Revision: https://phabricator.haskell.org/D2969

 GHC Trac Issues: #13108
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13108#comment:4>
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