04-04-2002
Hi
This happens when there is some sort of conflict within memory. A file called "core" is produced. This contains an image of the memory at the time the problem occurred. There are packages available to examine the "core" file to find out where the memory conflict occurs. But, its not always easy to trace the error.
There could be numerous reasons why this is happening. It could be that he application could require permissions or environment variables which are only available to the superuser. Although it may be just "luck" that the core dump does not happen as "superuser", such is the nature of memory faults. Do you have the source code to the application? If so, it may be worth checking the permissions/env variables theory within the code. It could also be a totally unrelated error in the source code.
Sorry to be vague, but memory faults are unpredictable by nature and difficult to track down without usually a great deal of investigation.
Good luck!
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LEARN ABOUT OPENSOLARIS
tnfxtract
tnfxtract(1) User Commands tnfxtract(1)
NAME
tnfxtract - extract kernel probes output into a trace file
SYNOPSIS
tnfxtract [-d dumpfile -n namelist] tnf_file
DESCRIPTION
The tnfxtract utility collects kernel trace output from an in-core buffer in the Solaris kernel, or from the memory image of a crashed sys-
tem, and generates a binary TNF trace file like those produced directly by user programs being traced.
Either both or neither of the -d and -n options must be specified. If neither is specified, trace output is extracted from the running ker-
nel. If both are specified, the -d argument names the file containing the (crashed) system memory image, and the -n argument names the file
containing the symbol table for the system memory image.
The TNF trace file tnf_file produced is exactly the same size as the in-core buffer; it is essentially a snapshot of that buffer. It is
legal to run tnfxtract while kernel tracing is active, i.e., while the in-core buffer is being written. tnfxtract insures that the output
file it generates is low-level consistent, that is, that only whole probes are written out, and that internal data structures in the buffer
are not corrupted because the buffer is being concurrently written.
The TNF trace file generated is suitable as input to tnfdump(1), which will generate an ASCII file.
OPTIONS
The following options are supported:
-d dumpfile Uses dumpfile as the system memory image, instead of the running kernel. The dumpfile is normally the path name of a file
generated by the savecore utility.
-n namelist Uses namelist as the file containing the symbol table information for the given dumpfile.
OPERANDS
The following operand is supported:
tnf_file Output file generated by tnfxtract based on kernel trace output from an in-core buffer in the Solaris kernel.
EXAMPLES
Example 1 Extracting probes from a running kernel
Extract probes from the running kernel into ktrace.out:
example% tnfxtract ktrace.out
Example 2 Extracting probes from a kernel crash dump
Extract probes from a kernel crash dump into ktrace.out:
example% tnfxtract -d /var/crash/`uname -n`/vmcore.0
-n /var/crash/`uname -n`/unix.0 ktrace.out
EXIT STATUS
The following exit values are returned:
0 Successful completion.
>0 An error occurred.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWtnfc |
+-----------------------------+-----------------------------+
SEE ALSO
prex(1), tnfdump(1), savecore(1M), tnf_kernel_probes(4), attributes(5)
SunOS 5.11 19 Aug 2003 tnfxtract(1)