From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-195564-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 18661 invoked by alias); 31 Aug 2006 19:06:09 -0000
Received: (qmail 18637 invoked by uid 48); 31 Aug 2006 19:06:01 -0000
Date: Thu, 31 Aug 2006 19:06:00 -0000
Subject: [Bug other/28917]  New: try/catch block removed. too optimistic optimization?
X-Bugzilla-Reason: CC
Message-ID: <bug-28917-7667@http.gcc.gnu.org/bugzilla/>
Reply-To: gcc-bugzilla@gcc.gnu.org
To: gcc-bugs@gcc.gnu.org
From: "pluto at agmk dot net" <gcc-bugzilla@gcc.gnu.org>
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
X-SW-Source: 2006-08/txt/msg02796.txt.bz2
List-Id: <gcc-bugs.sourceware.org>

with fixed PR26208 we can throw exceptions from signal handlers.
catch() works pretty fine with complex call-chain but fails on
simple testcase.

#include <csignal>
void signalHandler( int signalNumber )
{
        throw 0;
}
int main()
{
        signal( SIGSEGV, signalHandler );
        try
        {
                int* p = 0;
                *p = 0;
        }
        catch ( int )
        {
        }
        return 0;
}

$ g++ throw_from_sighandler.cpp -O1 --save-temps && ./a.out
terminate called after throwing an instance of 'int'
zsh: abort      ./a.out

main:
        subq    $8, %rsp
        movl    $_Z13signalHandleri, %esi
        movl    $11, %edi
        call    signal
        movl    $0, 0
        movl    $0, %eax
        addq    $8, %rsp
        ret


-- 
           Summary: try/catch block removed. too optimistic optimization?
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pluto at agmk dot net
GCC target triplet: x86-64-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28917