05-21-2009
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
Does anyone know how to read core dumps. Is gdb the only tool for it ? The OS is Solaris.
Thanks (2 Replies)
Discussion started by: suntan
2 Replies
2. Solaris
I have the following set up on a Sun server running solaris 5.8 for core dump generation
coreadm
global core file pattern: /var/core
init core file pattern: /var/core
global core dumps: enabled
per-process core dumps: enabled
global setid core dumps:... (4 Replies)
Discussion started by: handak9
4 Replies
3. Programming
hi everyone,
Right now when I do:
strcmp(s1, s2);
i get a core dump because at times s1 or s2 can be nothing so that makes strcmp() core dump.
What is the solution, if at times I expect one of them (or both) to be NULL?
I want to be able to compare that s1 is NULL and s2 is "blah" or... (6 Replies)
Discussion started by: annie
6 Replies
4. SCO
Anyone know how you go about interrogating a panic / core dump with crash for SCO Unix (5 Replies)
Discussion started by: ccarcher
5 Replies
5. UNIX for Advanced & Expert Users
Hi,
Can we modify the GDB source code so as to analyze core dumps from different targets? From my analysis, I think we need to build our section table statically for each target. i.e., including the various address boundaries in build_section_table() function. If this is the case, then the GDB... (2 Replies)
Discussion started by: nsdeeps
2 Replies
6. Programming
My program is not dumping core when hitting a segmentation violation inside a thread.
However, it dumps core when the segv occurs within main.
Any ideas on how to diagnose this?
AIX 5.3 (4 Replies)
Discussion started by: bean66
4 Replies
7. Ubuntu
Hello,
I am debugging a program which works as daemon. It sigfaults, unfortunately I'm unable to generate core dump file. Here is what I am doing:
tsurko@bastila:~$ ulimit -c unlimited
tsurko@bastila:~$ ulimit -c
unlimited
tsurko@bastila:~$ cat /etc/sysctl.conf | grep 'core_pattern'... (1 Reply)
Discussion started by: tsurko
1 Replies
8. Red Hat
Hi
I have a Fedora installed and I try to generate my application's core dump file.
My system has no coredump limit:
$ ulimit
core file size (blocks, -c) unlimited
But when my application crashes no core dumps generated. I can generate dump file using gcore but it is not appropraite... (1 Reply)
Discussion started by: xyzt
1 Replies
9. Programming
I'm working on a program in Linux with a group of people scattered around the country. When we have a crash, I like to send a core dump to the appropriate person so that they can understand the problem better. The problem is that our application uses several gigabytes worth of data and these... (4 Replies)
Discussion started by: bmsterner
4 Replies
10. HP-UX
kill -SEGV <pid> gives me the core file for that process but also terminates the process.
Can I not get the core dump without terminating the process ? (2 Replies)
Discussion started by: mohtashims
2 Replies
preap(1) User Commands preap(1)
NAME
preap - force a defunct process to be reaped by its parent
SYNOPSIS
preap [-F] pid...
DESCRIPTION
A defunct (or zombie) process is one whose exit status has yet to be reaped by its parent. The exit status is reaped via the wait(3C),
waitid(2), or waitpid(3C) system call. In the normal course of system operation, zombies may occur, but are typically short-lived. This may
happen if a parent exits without having reaped the exit status of some or all of its children. In that case, those children are reparented
to PID 1. See init(1M), which periodically reaps such processes.
An irresponsible parent process may not exit for a very long time and thus leave zombies on the system. Since the operating system destroys
nearly all components of a process before it becomes defunct, such defunct processes do not normally impact system operation. However, they
do consume a small amount of system memory.
preap forces the parent of the process specified by pid to waitid(3C) for pid, if pid represents a defunct process.
preap will attempt to prevent the administrator from unwisely reaping a child process which might soon be reaped by the parent, if:
o The process is a child of init(1M).
o The parent process is stopped and might wait on the child when it is again allowed to run.
o The process has been defunct for less than one minute.
OPTIONS
The following option is supported:
-F Forces the parent to reap the child, overriding safety checks.
OPERANDS
The following operand is supported:
pid Process ID list.
EXIT STATUS
The following exit values are returned by preap, which prints the exit status of each target process reaped:
0 Successfully operation.
non-zero Failure, such as no such process, permission denied, or invalid option.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWesu (32-bit) |
+-----------------------------+-----------------------------+
| |SUNWesxu (64-bit) |
+-----------------------------+-----------------------------+
SEE ALSO
proc(1), init(1M), waitid(2), wait(3C), waitpid(3C), proc(4), attributes(5)
WARNINGS
preap should be applied sparingly and only in situations in which the administrator or developer has confirmed that defunct processes will
not be reaped by the parent process. Otherwise, applying preap may damage the parent process in unpredictable ways.
SunOS 5.10 26 Mar 2001 preap(1)