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| <h3 class="section">13.4 Using Trace Files</h3> |
| |
| <p><a name="index-trace-files-757"></a> |
| In some situations, the target running a trace experiment may no |
| longer be available; perhaps it crashed, or the hardware was needed |
| for a different activity. To handle these cases, you can arrange to |
| dump the trace data into a file, and later use that file as a source |
| of trace data, via the <code>target tfile</code> command. |
| |
| |
| <a name="index-tsave-758"></a> |
| <dl><dt><code>tsave [ -r ] </code><var>filename</var><dd>Save the trace data to <var>filename</var>. By default, this command |
| assumes that <var>filename</var> refers to the host filesystem, so if |
| necessary <span class="sc">gdb</span> will copy raw trace data up from the target and |
| then save it. If the target supports it, you can also supply the |
| optional argument <code>-r</code> (“remote”) to direct the target to save |
| the data directly into <var>filename</var> in its own filesystem, which may be |
| more efficient if the trace buffer is very large. (Note, however, that |
| <code>target tfile</code> can only read from files accessible to the host.) |
| |
| <p><a name="index-target-tfile-759"></a><a name="index-tfile-760"></a><br><dt><code>target tfile </code><var>filename</var><dd>Use the file named <var>filename</var> as a source of trace data. Commands |
| that examine data work as they do with a live target, but it is not |
| possible to run any new trace experiments. <code>tstatus</code> will report |
| the state of the trace run at the moment the data was saved, as well |
| as the current trace frame you are examining. <var>filename</var> must be |
| on a filesystem accessible to the host. |
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