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  18. <title>GDB/MI Breakpoint Information (Debugging with GDB)</title>

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  63. <a name="GDB_002fMI-Breakpoint-Information"></a>

  64. <div class="header">

  65. <p>

  66. Next: <a href="GDB_002fMI-Frame-Information.html#GDB_002fMI-Frame-Information" accesskey="n" rel="next">GDB/MI Frame Information</a>, Previous: <a href="GDB_002fMI-Async-Records.html#GDB_002fMI-Async-Records" accesskey="p" rel="prev">GDB/MI Async Records</a>, Up: <a href="GDB_002fMI-Output-Records.html#GDB_002fMI-Output-Records" accesskey="u" rel="up">GDB/MI Output Records</a> &nbsp; [<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>

  67. </div>

  68. <hr>

  69. <a name="GDB_002fMI-Breakpoint-Information-1"></a>

  70. <h4 class="subsection">27.5.4 <small>GDB/MI</small> Breakpoint Information</h4>

  71. 

  72. <p>When <small>GDB</small> reports information about a breakpoint, a

  73. tracepoint, a watchpoint, or a catchpoint, it uses a tuple with the

  74. following fields:

  75. </p>

  76. <dl compact="compact">

  77. <dt><code>number</code></dt>

  78. <dd><p>The breakpoint number.

  79. </p>

  80. </dd>

  81. <dt><code>type</code></dt>

  82. <dd><p>The type of the breakpoint.  For ordinary breakpoints this will be

  83. &lsquo;<samp>breakpoint</samp>&rsquo;, but many values are possible.

  84. </p>

  85. </dd>

  86. <dt><code>catch-type</code></dt>

  87. <dd><p>If the type of the breakpoint is &lsquo;<samp>catchpoint</samp>&rsquo;, then this

  88. indicates the exact type of catchpoint.

  89. </p>

  90. </dd>

  91. <dt><code>disp</code></dt>

  92. <dd><p>This is the breakpoint disposition&mdash;either &lsquo;<samp>del</samp>&rsquo;, meaning that

  93. the breakpoint will be deleted at the next stop, or &lsquo;<samp>keep</samp>&rsquo;,

  94. meaning that the breakpoint will not be deleted.

  95. </p>

  96. </dd>

  97. <dt><code>enabled</code></dt>

  98. <dd><p>This indicates whether the breakpoint is enabled, in which case the

  99. value is &lsquo;<samp>y</samp>&rsquo;, or disabled, in which case the value is &lsquo;<samp>n</samp>&rsquo;.

  100. Note that this is not the same as the field <code>enable</code>.

  101. </p>

  102. </dd>

  103. <dt><code>addr</code></dt>

  104. <dd><p>The address of the breakpoint.  This may be a hexidecimal number,

  105. giving the address; or the string &lsquo;<samp>&lt;PENDING&gt;</samp>&rsquo;, for a pending

  106. breakpoint; or the string &lsquo;<samp>&lt;MULTIPLE&gt;</samp>&rsquo;, for a breakpoint with

  107. multiple locations.  This field will not be present if no address can

  108. be determined.  For example, a watchpoint does not have an address.

  109. </p>

  110. </dd>

  111. <dt><code>addr_flags</code></dt>

  112. <dd><p>Optional field containing any flags related to the address.  These flags are

  113. architecture-dependent; see <a href="Architectures.html#Architectures">Architectures</a> for their meaning for a

  114. particular CPU.

  115. </p>

  116. </dd>

  117. <dt><code>func</code></dt>

  118. <dd><p>If known, the function in which the breakpoint appears.

  119. If not known, this field is not present.

  120. </p>

  121. </dd>

  122. <dt><code>filename</code></dt>

  123. <dd><p>The name of the source file which contains this function, if known.

  124. If not known, this field is not present.

  125. </p>

  126. </dd>

  127. <dt><code>fullname</code></dt>

  128. <dd><p>The full file name of the source file which contains this function, if

  129. known.  If not known, this field is not present.

  130. </p>

  131. </dd>

  132. <dt><code>line</code></dt>

  133. <dd><p>The line number at which this breakpoint appears, if known.

  134. If not known, this field is not present.

  135. </p>

  136. </dd>

  137. <dt><code>at</code></dt>

  138. <dd><p>If the source file is not known, this field may be provided.  If

  139. provided, this holds the address of the breakpoint, possibly followed

  140. by a symbol name.

  141. </p>

  142. </dd>

  143. <dt><code>pending</code></dt>

  144. <dd><p>If this breakpoint is pending, this field is present and holds the

  145. text used to set the breakpoint, as entered by the user.

  146. </p>

  147. </dd>

  148. <dt><code>evaluated-by</code></dt>

  149. <dd><p>Where this breakpoint&rsquo;s condition is evaluated, either &lsquo;<samp>host</samp>&rsquo; or

  150. &lsquo;<samp>target</samp>&rsquo;.

  151. </p>

  152. </dd>

  153. <dt><code>thread</code></dt>

  154. <dd><p>If this is a thread-specific breakpoint, then this identifies the

  155. thread in which the breakpoint can trigger.

  156. </p>

  157. </dd>

  158. <dt><code>task</code></dt>

  159. <dd><p>If this breakpoint is restricted to a particular Ada task, then this

  160. field will hold the task identifier.

  161. </p>

  162. </dd>

  163. <dt><code>cond</code></dt>

  164. <dd><p>If the breakpoint is conditional, this is the condition expression.

  165. </p>

  166. </dd>

  167. <dt><code>ignore</code></dt>

  168. <dd><p>The ignore count of the breakpoint.

  169. </p>

  170. </dd>

  171. <dt><code>enable</code></dt>

  172. <dd><p>The enable count of the breakpoint.

  173. </p>

  174. </dd>

  175. <dt><code>traceframe-usage</code></dt>

  176. <dd><p>FIXME.

  177. </p>

  178. </dd>

  179. <dt><code>static-tracepoint-marker-string-id</code></dt>

  180. <dd><p>For a static tracepoint, the name of the static tracepoint marker.

  181. </p>

  182. </dd>

  183. <dt><code>mask</code></dt>

  184. <dd><p>For a masked watchpoint, this is the mask.

  185. </p>

  186. </dd>

  187. <dt><code>pass</code></dt>

  188. <dd><p>A tracepoint&rsquo;s pass count.

  189. </p>

  190. </dd>

  191. <dt><code>original-location</code></dt>

  192. <dd><p>The location of the breakpoint as originally specified by the user.

  193. This field is optional.

  194. </p>

  195. </dd>

  196. <dt><code>times</code></dt>

  197. <dd><p>The number of times the breakpoint has been hit.

  198. </p>

  199. </dd>

  200. <dt><code>installed</code></dt>

  201. <dd><p>This field is only given for tracepoints.  This is either &lsquo;<samp>y</samp>&rsquo;,

  202. meaning that the tracepoint is installed, or &lsquo;<samp>n</samp>&rsquo;, meaning that it

  203. is not.

  204. </p>

  205. </dd>

  206. <dt><code>what</code></dt>

  207. <dd><p>Some extra data, the exact contents of which are type-dependent.

  208. </p>

  209. </dd>

  210. <dt><code>locations</code></dt>

  211. <dd><p>This field is present if the breakpoint has multiple locations.  It is also

  212. exceptionally present if the breakpoint is enabled and has a single, disabled

  213. location.

  214. </p>

  215. <p>The value is a list of locations.  The format of a location is described below.

  216. </p>

  217. </dd>

  218. </dl>

  219. 

  220. <p>A location in a multi-location breakpoint is represented as a tuple with the

  221. following fields:

  222. </p>

  223. <dl compact="compact">

  224. <dt><code>number</code></dt>

  225. <dd><p>The location number as a dotted pair, like &lsquo;<samp>1.2</samp>&rsquo;.  The first digit is the

  226. number of the parent breakpoint.  The second digit is the number of the

  227. location within that breakpoint.

  228. </p>

  229. </dd>

  230. <dt><code>enabled</code></dt>

  231. <dd><p>This indicates whether the location is enabled, in which case the

  232. value is &lsquo;<samp>y</samp>&rsquo;, or disabled, in which case the value is &lsquo;<samp>n</samp>&rsquo;.

  233. Note that this is not the same as the field <code>enable</code>.

  234. </p>

  235. </dd>

  236. <dt><code>addr</code></dt>

  237. <dd><p>The address of this location as an hexidecimal number.

  238. </p>

  239. </dd>

  240. <dt><code>addr_flags</code></dt>

  241. <dd><p>Optional field containing any flags related to the address.  These flags are

  242. architecture-dependent; see <a href="Architectures.html#Architectures">Architectures</a> for their meaning for a

  243. particular CPU.

  244. </p>

  245. </dd>

  246. <dt><code>func</code></dt>

  247. <dd><p>If known, the function in which the location appears.

  248. If not known, this field is not present.

  249. </p>

  250. </dd>

  251. <dt><code>file</code></dt>

  252. <dd><p>The name of the source file which contains this location, if known.

  253. If not known, this field is not present.

  254. </p>

  255. </dd>

  256. <dt><code>fullname</code></dt>

  257. <dd><p>The full file name of the source file which contains this location, if

  258. known.  If not known, this field is not present.

  259. </p>

  260. </dd>

  261. <dt><code>line</code></dt>

  262. <dd><p>The line number at which this location appears, if known.

  263. If not known, this field is not present.

  264. </p>

  265. </dd>

  266. <dt><code>thread-groups</code></dt>

  267. <dd><p>The thread groups this location is in.

  268. </p>

  269. </dd>

  270. </dl>

  271. 

  272. <p>For example, here is what the output of <code>-break-insert</code>

  273. (see <a href="GDB_002fMI-Breakpoint-Commands.html#GDB_002fMI-Breakpoint-Commands">GDB/MI Breakpoint Commands</a>) might be:

  274. </p>

  275. <div class="smallexample">

  276. <pre class="smallexample">-&gt; -break-insert main

  277. &lt;- ^done,bkpt={number=&quot;1&quot;,type=&quot;breakpoint&quot;,disp=&quot;keep&quot;,

  278.     enabled=&quot;y&quot;,addr=&quot;0x08048564&quot;,func=&quot;main&quot;,file=&quot;myprog.c&quot;,

  279.     fullname=&quot;/home/nickrob/myprog.c&quot;,line=&quot;68&quot;,thread-groups=[&quot;i1&quot;],

  280.     times=&quot;0&quot;}

  281. &lt;- (gdb)

  282. </pre></div>

  283. 

  284. <hr>

  285. <div class="header">

  286. <p>

  287. Next: <a href="GDB_002fMI-Frame-Information.html#GDB_002fMI-Frame-Information" accesskey="n" rel="next">GDB/MI Frame Information</a>, Previous: <a href="GDB_002fMI-Async-Records.html#GDB_002fMI-Async-Records" accesskey="p" rel="prev">GDB/MI Async Records</a>, Up: <a href="GDB_002fMI-Output-Records.html#GDB_002fMI-Output-Records" accesskey="u" rel="up">GDB/MI Output Records</a> &nbsp; [<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>

  288. </div>

  289. 

  290. 

  291. 

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