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From: "jiang30056284 at sina dot com" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug breakpoints/14588] New: Option-g-O0 bug
Date: Sun, 16 Sep 2012 06:43:00 -0000
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http://sourceware.org/bugzilla/show_bug.cgi?id=14588

             Bug #: 14588
           Summary: Option-g-O0 bug
           Product: gdb
           Version: 7.4
            Status: NEW
          Severity: normal
          Priority: P2
         Component: breakpoints
        AssignedTo: unassigned@sourceware.org
        ReportedBy: jiang30056284@sina.com
    Classification: Unclassified


//123.c
char macro_ptr=0;
void next(void)
{
redo:
    if (!macro_ptr)
    {    
        if (macro_ptr)
        {
            if (macro_ptr)
            {
                if (macro_ptr)
                {
                    goto redo;
                }
            }
        }
    }
    else
    {    
        goto redo;        
    }
}

int main()
{
    char a=0,b=9;
    next();
    b=a+b;
    return 0;
}

jiang@jiang:~$ gcc -o123 -g -O0 123.c
jiang@jiang:~$ gdb 123
GNU gdb (Ubuntu/Linaro 7.4-2012.04-0ubuntu2) 7.4-2012.04
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://bugs.launchpad.net/gdb-linaro/>...
Reading symbols from /home/jiang/123...done.
(gdb) break main 
Breakpoint 1 at 0x4004f4: file 123.c, line 28.
(gdb) run
Starting program: /home/jiang/123 

Breakpoint 1, main () at 123.c:28
28        char a=0,b=9;
(gdb) s
29        next();
(gdb) 
[Inferior 1 (process 2322) exited normally]
warning: Error removing breakpoint 0
warning: Error removing breakpoint 0
warning: Error removing breakpoint 0
(gdb)

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