[Mingw-users] GDB began crashing in GetOpenFileNameA()

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Eli Zaretskii eliz****@gnu*****
Sun May 13 11:40:41 JST 2018


> From: "raynebc ." <rayne****@gmail*****>
> Date: Sat, 12 May 2018 19:08:17 -0600
> 
> I've been using GDB 7.6.1-1 with MinGW for a while now across various
> versions of Windows, and after recently performing some Windows on my
> development computer (Windows 7 Pro x64 SP1) and rebooting, running my
> program through the GDB debugger in Code::Blocks would trigger GDB to crash
> when I invoked a file browser (Windows's GetOpenFileNameA() function).  I
> don't know much about debugging, but under the advice of others I collected
> the following output by attaching GDB to the crashed GDB process:
> 
> (gdb) bt full
> #0  0x77bd000d in ntdll!DbgBreakPoint () from C:\Windows\SysWOW64\ntdll.dll
> No symbol table info available.
> #1  0x77c5f306 in ntdll!DbgUiRemoteBreakin ()
>    from C:\Windows\SysWOW64\ntdll.dll
> No symbol table info available.
> #2  0x4c6174e9 in ?? ()
> No symbol table info available.
> #3  0x00000000 in ?? ()
> No symbol table info available.
> (gdb) bt 1 full
> #0  0x77bd000d in ntdll!DbgBreakPoint () from C:\Windows\SysWOW64\ntdll.dll
> No symbol table info available.
> (More stack frames follow...)
> (gdb) info thread
>   Id   Target Id         Frame
> * 3    Thread 8484.0x2278 0x77bd000d in ntdll!DbgBreakPoint ()
>    from C:\Windows\SysWOW64\ntdll.dll
>   2    Thread 8484.0x19a4 0x77be018d in ntdll!ZwWaitForMultipleObjects ()
>    from C:\Windows\SysWOW64\ntdll.dll
>   1    Thread 8484.0x2310 0x77be018d in ntdll!ZwWaitForMultipleObjects ()
>    from C:\Windows\SysWOW64\ntdll.dll
> (gdb)

It looks like your GDB was stripped of debugging symbols, so the
backtrace is not meaningful.

> I can work around this problem by passing the file I wanted to load in my
> program over the command line so I didn't have to use the file browser, but
> I was hoping there is a way I could resolve this.  Given the timing of this
> problem, I would assume it's likely due to the Windows updates, but does
> anybody else know if this is the case?

I'm using a MinGW GDB on Windows 7 almost every day without problems,
but I cannot be sure the programs I debug call that Windows API.

You could try a newer GDB from the ezwinports site, maybe it will be
free of this problem.

> Is there any useful debugging I can collect to help provide a
> solution?

The Windows Events Log might have additional info about the crash,
although I doubt it will pinpoint the root cause.




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