Bug 19774 - VLA's vs SjLj EH unwind
Summary: VLA's vs SjLj EH unwind
Status: RESOLVED FIXED
Alias: None
Product: gcc
Classification: Unclassified
Component: middle-end (show other bugs)
Version: 3.4.4
: P2 normal
Target Milestone: ---
Assignee: Not yet assigned to anyone
URL:
Keywords: EH, sjlj-eh, wrong-code
: 30196 33874 (view as bug list)
Depends on:
Blocks: 25266
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Reported: 2005-02-03 08:11 UTC by Danny Smith
Modified: 2012-01-23 23:18 UTC (History)
6 users (show)

See Also:
Host: i686-pc-mingw32
Target: i686-pc-mingw32
Build: i686-pc-mingw32
Known to work:
Known to fail:
Last reconfirmed: 2005-09-30 05:32:58

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Description Danny Smith 2005-02-03 08:11:54 UTC 
The following testcase fails when using  sjlj EH unwind (mingw32
compiler) but succeeds when using Dwarf2 EH unwind (also mingw with
sources modified to enable Dwarf2).

Is this related to PR 19771?

/* sjlj_vla.cc */
extern "C" void abort(void);

void foo()
{
  int size = 1;
  int a[size];

  a[0] = 0;

  try
    {
      throw 0;
    }
  catch (int i)
    {
    }
  
  if (a[0] != 0)
    abort();
}

int main()
{
  foo();
}
Comment 1 Andrew Pinski 2005-05-05 05:34:12 UTC 
Confirmed, also on i686-pc-openbsd3.1 which also uses sjlj exceptions.
Comment 2 Andrew Pinski 2007-03-14 06:06:08 UTC 
*** Bug 30196 has been marked as a duplicate of this bug. ***
Comment 3 patchapp@dberlin.org 2007-03-14 18:46:00 UTC 
Subject: Bug number PR middle-end/19774

A patch for this bug has been added to the patch tracker.
The mailing list url for the patch is http://gcc.gnu.org/ml/gcc-patches/2007-03/msg00946.html
Comment 4 Andrew Pinski 2007-10-23 20:48:43 UTC 
*** Bug 33874 has been marked as a duplicate of this bug. ***
Comment 5 Kai Tietz 2012-01-23 23:18:07 UTC 
I tested this patch with current trunk (4.7.0) and test passes without issues.  The reported gcc version having this bug is pretty old.  So I close it.