CORE(5) BSD File Formats Manual CORE(5)NAME
core -- memory image file format
SYNOPSIS
#include <sys/param.h>
DESCRIPTION
A small number of signals which cause abnormal termination of a process also cause a record of the process's in-core state to be written to
disk for later examination by one of the available debuggers. (See sigaction(2).) This memory image is written to a file named by default
core.pid in the /cores directory; provided the terminated process had write permission in the directory, and the directory existed.
The maximum size of a core file is limited by setrlimit(2). Files which would be larger than the limit are not created.
The core file consists of the ~ Mach-O(5) header as described in the <mach-o/loader.h> file. The remainder of the core file consists of
various sections described in the Mach-O(5) header.
NOTE
Core dumps are disabled by default under Darwin/Mac OS X. To re-enable core dumps, a privlaged user must edit /etc/hostconfig to contain the
line:
COREDUMPS=-YES-
SEE ALSO gdb(1), setrlimit(2), sigaction(2), Mach-O(5), sysctl(8)HISTORY
A core file format appeared in Version 6 AT&T UNIX.
BSD March 18, 2002 BSD
Check Out this Related Man Page
CORE(5) File Formats Manual CORE(5)NAME
core - format of memory image file
SYNOPSIS
#include <sys/param.h>
DESCRIPTION
The UNIX System writes out a memory image of a terminated process when any of various errors occur. See sigvec(2) for the list of reasons;
the most common are memory violations, illegal instructions, bus errors, and user-generated quit signals. The memory image is called
`core' and is written in the process's working directory (provided it can be; normal access controls apply).
The core file consists of the u. area, whose size (in 64 byte `clicks') is defined by the USIZE manifest in the <sys/param.h> file. The
u. area starts with a user structure as given in <sys/user.h>. The rest of the u. area consists of the kernel stack for the terminated
process which includes (among other things) the processor registers at the time of the fault; see the system listings for the format of
this area. The remainder of the core file consists first of the data pages and then the stack pages of the process image. The amount of
data space image in the core file is given (in clicks) by the variable u_dsize in the u. area. If the text segment was not write-only and
and shared it is included as the first etext bytes of the data image where etext is taken from the symbol table of the object file which
generated the memory image. The amount of stack image in the core file is given (in clicks) by the variable u_ssize in the u. area.
In general the debugger adb(1) is sufficient to deal with core images.
SEE ALSO adb(1), sigvec(2), stack(5)3rd Berkeley Distribution January 26, 1987 CORE(5)
Hi ALL,
Is it possible to decode the core dumb file to find the error?
I get an Memory Core Dumb error with an core file.
Regards,
P. Prathaban. (3 Replies)
Hi,
Is there any way to find the mode of the binary file (debug or release) by analyzing the core file generated by that binary on the HPUX11i Platform? (5 Replies)
Ok, I have what I think is a relatively simple question, but being me I'll give the full background. In writing a new CheckSystem for one of my servers at work I want to check for core dumps. I was originally doing this like so:
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Hello all.
I have made an application in C using pthreads. My problem is that my program seems to be only using 1 of my cores when I create multiple threads. I have 4 cores (Q9300). I am using Ubuntu 8.04.
I do believe the problem is that on linkage it's using a pthread emulation package... (4 Replies)
My program is not dumping core when hitting a segmentation violation inside a thread.
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Any ideas on how to diagnose this?
AIX 5.3 (4 Replies)
Hi All ,
i found two core files on aix customer machine due to two pro-c executables . we dont have any debugger like dbx . even i captured the log reports reg the core dumps .. i pasted the details here belo3w .please help me out h ow to resolve the issue :-( .... THANKS IN ADVANCE ...
... (4 Replies)
Hello All,
I need to basically capture any core dump of C++ binary which is running in a perl script on SUN Solaris OS.
I dont kno much in C++. Can you please suggest me a C++ binary that core dumps when i run which i can use to capture in my Perl script.
Thanks,
Sateesh (3 Replies)
Hi,
I am running a iplanet webserver in a HP-UX box and the iplanet webserver is crashing oftenly. I want to take a core dump. Could you please let me know how can i check whether server core is enabled?
if not how can i enable the same?
Also let me know to which path it saves the core.
... (7 Replies)
I have a weird situation in which the binary dumps core and gives bus error. But before dumping the core and throwing the buss error, it gives some output.
unfortunately I can't grep the output before core dump
db2bfd -b test.bnd
maxSect 15
Bus Error (core dumped)
But if I do ... (4 Replies)
hello everyone,
can anyone tell me what drivers the Mach kernel works with. I'm thinking about experimenting with the Mach kernel, and yes I know there are other kernels that are easier to work with but I just want to use the Mach kernel. So with that being said, can the Mach kernel work with... (11 Replies)
1. The problem statement, all variables and given/known data:
When looking for corefiles, include any file with core in its name. (Some UNIX/Linux systems add the PID of the process that created the core to reduce the chances of overwriting an already existing core file that might be needed. The... (6 Replies)
In sun solaris whenever a jvm crashes we used to get the core file generated in binary format. We convert this core file to human readable format using
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Yesterday someone asked me to install TeamViewer and share my Mac screen with them while on a conference call.
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Hi,
Currently, we have a Perl script from a third-party vendor that is generating core dumps. It has been reported. We can't turn off the script as it does generate some diagnostic file that's required. So at the moment, we have to let it continue to do its run.
I wish I can say the vendor is... (8 Replies)