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| Previous: <a href="Branch-Trace-Format.html#Branch-Trace-Format" accesskey="p" rel="prev">Branch Trace Format</a>, Up: <a href="Remote-Protocol.html#Remote-Protocol" accesskey="u" rel="up">Remote Protocol</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p> |
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| <a name="Branch-Trace-Configuration-Format-1"></a> |
| <h3 class="section">E.20 Branch Trace Configuration Format</h3> |
| <a name="index-branch-trace-configuration-format"></a> |
| |
| <p>For each inferior thread, <small>GDB</small> can obtain the branch trace |
| configuration using the ‘<samp>qXfer:btrace-conf:read</samp>’ |
| (see <a href="General-Query-Packets.html#qXfer-btrace_002dconf-read">qXfer btrace-conf read</a>) packet. |
| </p> |
| <p>The configuration describes the branch trace format and configuration |
| settings for that format. The following information is described: |
| </p> |
| <dl compact="compact"> |
| <dt><code>bts</code></dt> |
| <dd><p>This thread uses the <em>Branch Trace Store</em> (<acronym>BTS</acronym>) format. |
| </p><dl compact="compact"> |
| <dt><code>size</code></dt> |
| <dd><p>The size of the <acronym>BTS</acronym> ring buffer in bytes. |
| </p></dd> |
| </dl> |
| </dd> |
| <dt><code>pt</code></dt> |
| <dd><p>This thread uses the <em>Intel(R) Processor Trace</em> (<acronym>Intel(R) |
| PT</acronym>) format. |
| </p><dl compact="compact"> |
| <dt><code>size</code></dt> |
| <dd><p>The size of the <acronym>Intel(R) PT</acronym> ring buffer in bytes. |
| </p></dd> |
| </dl> |
| </dd> |
| </dl> |
| |
| <p><small>GDB</small> must be linked with the Expat library to support XML |
| branch trace configuration discovery. See <a href="Requirements.html#Expat">Expat</a>. |
| </p> |
| <p>The formal DTD for the branch trace configuration format is given below: |
| </p> |
| <div class="smallexample"> |
| <pre class="smallexample"><!ELEMENT btrace-conf (bts?, pt?)> |
| <!ATTLIST btrace-conf version CDATA #FIXED "1.0"> |
| |
| <!ELEMENT bts EMPTY> |
| <!ATTLIST bts size CDATA #IMPLIED> |
| |
| <!ELEMENT pt EMPTY> |
| <!ATTLIST pt size CDATA #IMPLIED> |
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