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<title>Debugging with GDB: C++ Exception GDB/MI Catchpoint Commands</title>
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<a name="C_002b_002b-Exception-GDB_002fMI-Catchpoint-Commands"></a>
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<div class="header">
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<p>
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Previous: <a href="Ada-Exception-GDB_002fMI-Catchpoint-Commands.html#Ada-Exception-GDB_002fMI-Catchpoint-Commands" accesskey="p" rel="previous">Ada Exception GDB/MI Catchpoint Commands</a>, Up: <a href="GDB_002fMI-Catchpoint-Commands.html#GDB_002fMI-Catchpoint-Commands" accesskey="u" rel="up">GDB/MI Catchpoint Commands</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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</div>
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<hr>
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<a name="C_002b_002b-Exception-GDB_002fMI-Catchpoints"></a>
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<h4 class="subsection">27.9.3 C<tt>++</tt> Exception <small>GDB/MI</small> Catchpoints</h4>
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<p>The following <small>GDB/MI</small> commands can be used to create catchpoints
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that stop the execution when C<tt>++</tt> exceptions are being throw, rethrown,
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or caught.
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</p>
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<a name="The-_002dcatch_002dthrow-Command"></a>
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<h4 class="subheading">The <code>-catch-throw</code> Command</h4>
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<a name="index-_002dcatch_002dthrow"></a>
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<a name="Synopsis-18"></a>
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<h4 class="subsubheading">Synopsis</h4>
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<div class="smallexample">
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<pre class="smallexample"> -catch-throw [ -t ] [ -r <var>regexp</var>]
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</pre></div>
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<p>Stop when the debuggee throws a C<tt>++</tt> exception. If <var>regexp</var> is
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given, then only exceptions whose type matches the regular expression
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will be caught.
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</p>
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<p>If ‘<samp>-t</samp>’ is given, then the catchpoint is enabled only for one
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stop, the catchpoint is automatically deleted after stopping once for
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the event.
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</p>
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<a name="GDB-Command-17"></a>
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<h4 class="subsubheading"><small>GDB</small> Command</h4>
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<p>The corresponding <small>GDB</small> commands are ‘<samp>catch throw</samp>’
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and ‘<samp>tcatch throw</samp>’ (see <a href="Set-Catchpoints.html#Set-Catchpoints">Set Catchpoints</a>).
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</p>
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<a name="Example-17"></a>
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<h4 class="subsubheading">Example</h4>
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<div class="smallexample">
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<pre class="smallexample">-catch-throw -r exception_type
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^done,bkpt={number="1",type="catchpoint",disp="keep",enabled="y",
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what="exception throw",catch-type="throw",
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thread-groups=["i1"],
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regexp="exception_type",times="0"}
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(gdb)
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-exec-run
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^running
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(gdb)
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~"\n"
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~"Catchpoint 1 (exception thrown), 0x00007ffff7ae00ed
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in __cxa_throw () from /lib64/libstdc++.so.6\n"
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*stopped,bkptno="1",reason="breakpoint-hit",disp="keep",
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frame={addr="0x00007ffff7ae00ed",func="__cxa_throw",
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args=[],from="/lib64/libstdc++.so.6",arch="i386:x86-64"},
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thread-id="1",stopped-threads="all",core="6"
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(gdb)
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</pre></div>
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<a name="The-_002dcatch_002drethrow-Command"></a>
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<h4 class="subheading">The <code>-catch-rethrow</code> Command</h4>
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<a name="index-_002dcatch_002drethrow"></a>
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<a name="Synopsis-19"></a>
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<h4 class="subsubheading">Synopsis</h4>
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<div class="smallexample">
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<pre class="smallexample"> -catch-rethrow [ -t ] [ -r <var>regexp</var>]
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</pre></div>
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<p>Stop when a C<tt>++</tt> exception is re-thrown. If <var>regexp</var> is given,
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then only exceptions whose type matches the regular expression will be
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caught.
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</p>
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<p>If ‘<samp>-t</samp>’ is given, then the catchpoint is enabled only for one
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stop, the catchpoint is automatically deleted after the first event is
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caught.
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</p>
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<a name="GDB-Command-18"></a>
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<h4 class="subsubheading"><small>GDB</small> Command</h4>
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<p>The corresponding <small>GDB</small> commands are ‘<samp>catch rethrow</samp>’
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and ‘<samp>tcatch rethrow</samp>’ (see <a href="Set-Catchpoints.html#Set-Catchpoints">Set Catchpoints</a>).
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</p>
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<a name="Example-18"></a>
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<h4 class="subsubheading">Example</h4>
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<div class="smallexample">
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<pre class="smallexample">-catch-rethrow -r exception_type
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^done,bkpt={number="1",type="catchpoint",disp="keep",enabled="y",
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what="exception rethrow",catch-type="rethrow",
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thread-groups=["i1"],
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regexp="exception_type",times="0"}
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(gdb)
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-exec-run
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^running
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(gdb)
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~"\n"
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~"Catchpoint 1 (exception rethrown), 0x00007ffff7ae00ed
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in __cxa_rethrow () from /lib64/libstdc++.so.6\n"
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*stopped,bkptno="1",reason="breakpoint-hit",disp="keep",
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frame={addr="0x00007ffff7ae00ed",func="__cxa_rethrow",
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args=[],from="/lib64/libstdc++.so.6",arch="i386:x86-64"},
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thread-id="1",stopped-threads="all",core="6"
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(gdb)
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</pre></div>
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<a name="The-_002dcatch_002dcatch-Command"></a>
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<h4 class="subheading">The <code>-catch-catch</code> Command</h4>
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<a name="index-_002dcatch_002dcatch"></a>
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<a name="Synopsis-20"></a>
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<h4 class="subsubheading">Synopsis</h4>
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<div class="smallexample">
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<pre class="smallexample"> -catch-catch [ -t ] [ -r <var>regexp</var>]
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</pre></div>
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<p>Stop when the debuggee catches a C<tt>++</tt> exception. If <var>regexp</var>
|
is given, then only exceptions whose type matches the regular
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expression will be caught.
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</p>
|
<p>If ‘<samp>-t</samp>’ is given, then the catchpoint is enabled only for one
|
stop, the catchpoint is automatically deleted after the first event is
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caught.
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</p>
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<a name="GDB-Command-19"></a>
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<h4 class="subsubheading"><small>GDB</small> Command</h4>
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<p>The corresponding <small>GDB</small> commands are ‘<samp>catch catch</samp>’
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and ‘<samp>tcatch catch</samp>’ (see <a href="Set-Catchpoints.html#Set-Catchpoints">Set Catchpoints</a>).
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</p>
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<a name="Example-19"></a>
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<h4 class="subsubheading">Example</h4>
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<div class="smallexample">
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<pre class="smallexample">-catch-catch -r exception_type
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^done,bkpt={number="1",type="catchpoint",disp="keep",enabled="y",
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what="exception catch",catch-type="catch",
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thread-groups=["i1"],
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regexp="exception_type",times="0"}
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(gdb)
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-exec-run
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^running
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(gdb)
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~"\n"
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~"Catchpoint 1 (exception caught), 0x00007ffff7ae00ed
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in __cxa_begin_catch () from /lib64/libstdc++.so.6\n"
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*stopped,bkptno="1",reason="breakpoint-hit",disp="keep",
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frame={addr="0x00007ffff7ae00ed",func="__cxa_begin_catch",
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args=[],from="/lib64/libstdc++.so.6",arch="i386:x86-64"},
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thread-id="1",stopped-threads="all",core="6"
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(gdb)
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</pre></div>
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<hr>
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<div class="header">
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<p>
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Previous: <a href="Ada-Exception-GDB_002fMI-Catchpoint-Commands.html#Ada-Exception-GDB_002fMI-Catchpoint-Commands" accesskey="p" rel="previous">Ada Exception GDB/MI Catchpoint Commands</a>, Up: <a href="GDB_002fMI-Catchpoint-Commands.html#GDB_002fMI-Catchpoint-Commands" accesskey="u" rel="up">GDB/MI Catchpoint Commands</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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