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User Commandstnfxtract(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 system, 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 kernel. 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, i.e., 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
Use 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
Use 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 TYPEATTRIBUTE VALUE
AvailabilitySUNWtnfc (32-bit)
 SUNWtnfcx (64-bit)

SEE ALSO

 

prex(1), tnfdump(1), savecore(1M), tnf_kernel_probes(4), attributes(5)


SunOS 5.9Go To TopLast Changed 4 Aug 1995

 
      
      
Copyright 2002 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.