tnfxtract - extract kernel probes output into a trace file
tnfxtract [-d dumpfile -n namelist] tnf_file
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, 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.
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.
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.
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/data/UUID/core.0 \
-n /var/crash/data/UUID/unix.0 ktrace.out
The following exit values are returned:
0
Successful completion.
>0
An error occurred.
prex(1),
tnfdump(1),
savecore(1M),
tnf_kernel_probes(4),
attributes(5)