[Mingw-notify] [ mingw-Bugs-630952 ] Crash using Kernel32 and C++ exceptions

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Bugs item #630952, was opened at 2002-10-30 22:32
Message generated for change (Comment added) made by dannysmith
You can respond by visiting: 
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Category: gcc
Group: component package
Status: Open
Resolution: Remind
Priority: 5
Submitted By: Florin Ghido (ghido)
Assigned to: Danny Smith (dannysmith)
Summary: Crash using Kernel32 and C++ exceptions

Initial Comment:

Hi!

There is a big problem with using Kernel32.dll functions
and C++ exceptions. After calling a Kernel32.dll function
with at least one parameter, the program fails to catch
any C++ exception.
This appears only when compiling with the option:
-fomit-frame-pointer 

The command line used is:
gcc -fomit-frame-pointer Test.cpp -lstdc++ -o Test.exe -s

I am using the latest packages:
MinGW-2.0.0-3.exe
binutils-2.13.90-20021006-2.tar.gz

The source.cpp file is:
--------------------------------------
#include <windows.h>

void test()
{
  SYSTEMTIME p;
  GetSystemTime(&p);
  throw 1;
}

int main(int argc,char* argv[])
{
  try
  {
    test();    
    return 0;
  }
  catch(...)
  {
    return 1;
  }
}
-----------------------------------------
Running it under W98 SE and W2000 P produces
the following result:

abnormal program termination

Best regards,
Florin Ghido


----------------------------------------------------------------------

>Comment By: Danny Smith (dannysmith)
Date: 2004-07-29 12:09

Message:
Logged In: YES 
user_id=11494

A follow up to report status with current (20040728( GCC 
sources and Dwarf2  enabled:

FAIL
 g++ -O0  -fomit-frame-pointer  test.cpp

PASS
 g++ -O1  -mno-accumulate-outgoing-args -fomit-frame-
pointer  test.cpp
[and all higher optimization]

 g++ -O[anything]  -maccumulate-outgoing-args -fomit-
frame-pointer  test.cpp

 g++ -O[anything]  -mno-accumulate-outgoing-args -fno-
omit-frame-pointer  test.cpp

So its still a problem with Dwarf2, but only when the _only_ 
optimizarion is -fomit-frame-pointer

Danny

----------------------------------------------------------------------

Comment By: Earnie Boyd (earnie)
Date: 2003-01-04 11:43

Message:
Logged In: YES 
user_id=15438

Florin, did you try Danny's suggestion?  What was the
result?  Also, please  try the gcc-3.2.1 release candidate
and report your results.

Thanks,
Earnie.

----------------------------------------------------------------------

Comment By: Danny Smith (dannysmith)
Date: 2002-10-31 12:53

Message:
Logged In: YES 
user_id=11494

Thanks for your report and testcase.

I confirm the bug on GCC 3.3 (CVS) built with with 
Dwarf2 EH handling.  The workaround is to add -
maccumulate-outgoing-args switch when using -fomit-
frame-pointer with Dwarf 2.

Could you try that with gcc 3.2 please?

With same gcc 3.3 source built with sjlj exception 
model, the  -fomit-frame-pointer switch works on your 
testcase, _without_ need for -maccumulate-outgoing-
args switch.

Have a look at PR 6764 at gnatsweb for another  
testcase that shows the same bug and the same 
workaround. 

Gnatsweb is here: 
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?database=gcc

Also, PR6764 tescase works fine with sjlj exception 
handling.

 Danny

----------------------------------------------------------------------

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