This is the mail archive of the
gdb-patches@sourceware.org
mailing list for the GDB project.
Re: [Cygwin] Fix for: detaching crashes the inferior.
On 4/10/07, Christopher Faylor wrote:
Are you sure you aren't seeing problems when you attach/detach more than
once? I know that there is someplace that isn't getting cleared in that
scenario. I have thought that I fixed that problem a few times but it
still seems to be there in the latest cygwin release.
I tried that many times, with the following test program:
$ cat main.c
#include <stdio.h>
#include <windows.h>
int
main(int argc, char** argv)
{
int count = 0;
while (1)
{
printf ("count = %d\n", count++);
fflush (stdout);
Sleep (1000);
}
}
I attached with gdb --pid <pid>, set a break on line 9, continue,
breakpoint is hit, hit next a couple of times, detach, reattach without
restarting gdb, continue till the breakpoint, step a couple times,
remove breakpoint, detach, restart gdb, attach, do the same, but
letting gdb start the inferior as a child, redo the testing a couple of
times, and nothing bad happens...
... except that once, I saw for this warning:
(gdb) attach 2396
Warning: Failed to get SE_DEBUG_NAME privilege
This can cause attach to fail on Windows NT/2K/XP
Attaching to program `/cygdrive/d/gdb-20070402/build/main.exe', process 2396
Loaded symbols for /cygdrive/c/WINNT/system32/ntdll.dll
Loaded symbols for /cygdrive/c/WINNT/system32/kernel32.dll
Loaded symbols for /usr/bin/cygwin1.dll
Loaded symbols for /cygdrive/c/WINNT/system32/advapi32.dll
Loaded symbols for /cygdrive/c/WINNT/system32/rpcrt4.dll
Loaded symbols for /cygdrive/c/WINNT/system32/secur32.dll
Loaded symbols for /cygdrive/c/WINNT/system32/user32.dll
Loaded symbols for /cygdrive/c/WINNT/system32/gdi32.dll
[Switching to thread 2396.0xe3c]
Have no idea if that is really a problem, but it should be a
separate patch.
Cheers,
Pedro Alves