| <html lang="en"> |
| <head> |
| <title>GDB/MI Breakpoint Commands - Debugging with GDB</title> |
| <meta http-equiv="Content-Type" content="text/html"> |
| <meta name="description" content="Debugging with GDB"> |
| <meta name="generator" content="makeinfo 4.13"> |
| <link title="Top" rel="start" href="index.html#Top"> |
| <link rel="up" href="GDB_002fMI.html#GDB_002fMI" title="GDB/MI"> |
| <link rel="prev" href="GDB_002fMI-Command-Description-Format.html#GDB_002fMI-Command-Description-Format" title="GDB/MI Command Description Format"> |
| <link rel="next" href="GDB_002fMI-Catchpoint-Commands.html#GDB_002fMI-Catchpoint-Commands" title="GDB/MI Catchpoint Commands"> |
| <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> |
| <!-- |
| Copyright (C) 1988-2019 Free Software Foundation, Inc. |
| |
| Permission is granted to copy, distribute and/or modify this document |
| under the terms of the GNU Free Documentation License, Version 1.3 or |
| any later version published by the Free Software Foundation; with the |
| Invariant Sections being ``Free Software'' and ``Free Software Needs |
| Free Documentation'', with the Front-Cover Texts being ``A GNU Manual,'' |
| and with the Back-Cover Texts as in (a) below. |
| |
| (a) The FSF's Back-Cover Text is: ``You are free to copy and modify |
| this GNU Manual. Buying copies from GNU Press supports the FSF in |
| developing GNU and promoting software freedom.'' |
| --> |
| <meta http-equiv="Content-Style-Type" content="text/css"> |
| <style type="text/css"><!-- |
| pre.display { font-family:inherit } |
| pre.format { font-family:inherit } |
| pre.smalldisplay { font-family:inherit; font-size:smaller } |
| pre.smallformat { font-family:inherit; font-size:smaller } |
| pre.smallexample { font-size:smaller } |
| pre.smalllisp { font-size:smaller } |
| span.sc { font-variant:small-caps } |
| span.roman { font-family:serif; font-weight:normal; } |
| span.sansserif { font-family:sans-serif; font-weight:normal; } |
| --></style> |
| </head> |
| <body> |
| <div class="node"> |
| <a name="GDB%2fMI-Breakpoint-Commands"></a> |
| <a name="GDB_002fMI-Breakpoint-Commands"></a> |
| <p> |
| Next: <a rel="next" accesskey="n" href="GDB_002fMI-Catchpoint-Commands.html#GDB_002fMI-Catchpoint-Commands">GDB/MI Catchpoint Commands</a>, |
| Previous: <a rel="previous" accesskey="p" href="GDB_002fMI-Command-Description-Format.html#GDB_002fMI-Command-Description-Format">GDB/MI Command Description Format</a>, |
| Up: <a rel="up" accesskey="u" href="GDB_002fMI.html#GDB_002fMI">GDB/MI</a> |
| <hr> |
| </div> |
| |
| <h3 class="section">27.8 <span class="sc">gdb/mi</span> Breakpoint Commands</h3> |
| |
| <p><a name="index-breakpoint-commands-for-_0040sc_007bgdb_002fmi_007d-2980"></a><a name="index-g_t_0040sc_007bgdb_002fmi_007d_002c-breakpoint-commands-2981"></a>This section documents <span class="sc">gdb/mi</span> commands for manipulating |
| breakpoints. |
| |
| <h4 class="subheading">The <code>-break-after</code> Command</h4> |
| |
| <p><a name="index-g_t_002dbreak_002dafter-2982"></a> |
| |
| <h5 class="subsubheading">Synopsis</h5> |
| |
| <pre class="smallexample"> -break-after <var>number</var> <var>count</var> |
| </pre> |
| <p>The breakpoint number <var>number</var> is not in effect until it has been |
| hit <var>count</var> times. To see how this is reflected in the output of |
| the ‘<samp><span class="samp">-break-list</span></samp>’ command, see the description of the |
| ‘<samp><span class="samp">-break-list</span></samp>’ command below. |
| |
| <h5 class="subsubheading"><span class="sc">gdb</span> Command</h5> |
| |
| <p>The corresponding <span class="sc">gdb</span> command is ‘<samp><span class="samp">ignore</span></samp>’. |
| |
| <h5 class="subsubheading">Example</h5> |
| |
| <pre class="smallexample"> (gdb) |
| -break-insert main |
| ^done,bkpt={number="1",type="breakpoint",disp="keep", |
| enabled="y",addr="0x000100d0",func="main",file="hello.c", |
| fullname="/home/foo/hello.c",line="5",thread-groups=["i1"], |
| times="0"} |
| (gdb) |
| -break-after 1 3 |
| ~ |
| ^done |
| (gdb) |
| -break-list |
| ^done,BreakpointTable={nr_rows="1",nr_cols="6", |
| hdr=[{width="3",alignment="-1",col_name="number",colhdr="Num"}, |
| {width="14",alignment="-1",col_name="type",colhdr="Type"}, |
| {width="4",alignment="-1",col_name="disp",colhdr="Disp"}, |
| {width="3",alignment="-1",col_name="enabled",colhdr="Enb"}, |
| {width="10",alignment="-1",col_name="addr",colhdr="Address"}, |
| {width="40",alignment="2",col_name="what",colhdr="What"}], |
| body=[bkpt={number="1",type="breakpoint",disp="keep",enabled="y", |
| addr="0x000100d0",func="main",file="hello.c",fullname="/home/foo/hello.c", |
| line="5",thread-groups=["i1"],times="0",ignore="3"}]} |
| (gdb) |
| </pre> |
| <h4 class="subheading">The <code>-break-commands</code> Command</h4> |
| |
| <p><a name="index-g_t_002dbreak_002dcommands-2983"></a> |
| |
| <h5 class="subsubheading">Synopsis</h5> |
| |
| <pre class="smallexample"> -break-commands <var>number</var> [ <var>command1</var> ... <var>commandN</var> ] |
| </pre> |
| <p>Specifies the CLI commands that should be executed when breakpoint |
| <var>number</var> is hit. The parameters <var>command1</var> to <var>commandN</var> |
| are the commands. If no command is specified, any previously-set |
| commands are cleared. See <a href="Break-Commands.html#Break-Commands">Break Commands</a>. Typical use of this |
| functionality is tracing a program, that is, printing of values of |
| some variables whenever breakpoint is hit and then continuing. |
| |
| <h5 class="subsubheading"><span class="sc">gdb</span> Command</h5> |
| |
| <p>The corresponding <span class="sc">gdb</span> command is ‘<samp><span class="samp">commands</span></samp>’. |
| |
| <h5 class="subsubheading">Example</h5> |
| |
| <pre class="smallexample"> (gdb) |
| -break-insert main |
| ^done,bkpt={number="1",type="breakpoint",disp="keep", |
| enabled="y",addr="0x000100d0",func="main",file="hello.c", |
| fullname="/home/foo/hello.c",line="5",thread-groups=["i1"], |
| times="0"} |
| (gdb) |
| -break-commands 1 "print v" "continue" |
| ^done |
| (gdb) |
| </pre> |
| <h4 class="subheading">The <code>-break-condition</code> Command</h4> |
| |
| <p><a name="index-g_t_002dbreak_002dcondition-2984"></a> |
| |
| <h5 class="subsubheading">Synopsis</h5> |
| |
| <pre class="smallexample"> -break-condition <var>number</var> <var>expr</var> |
| </pre> |
| <p>Breakpoint <var>number</var> will stop the program only if the condition in |
| <var>expr</var> is true. The condition becomes part of the |
| ‘<samp><span class="samp">-break-list</span></samp>’ output (see the description of the ‘<samp><span class="samp">-break-list</span></samp>’ |
| command below). |
| |
| <h5 class="subsubheading"><span class="sc">gdb</span> Command</h5> |
| |
| <p>The corresponding <span class="sc">gdb</span> command is ‘<samp><span class="samp">condition</span></samp>’. |
| |
| <h5 class="subsubheading">Example</h5> |
| |
| <pre class="smallexample"> (gdb) |
| -break-condition 1 1 |
| ^done |
| (gdb) |
| -break-list |
| ^done,BreakpointTable={nr_rows="1",nr_cols="6", |
| hdr=[{width="3",alignment="-1",col_name="number",colhdr="Num"}, |
| {width="14",alignment="-1",col_name="type",colhdr="Type"}, |
| {width="4",alignment="-1",col_name="disp",colhdr="Disp"}, |
| {width="3",alignment="-1",col_name="enabled",colhdr="Enb"}, |
| {width="10",alignment="-1",col_name="addr",colhdr="Address"}, |
| {width="40",alignment="2",col_name="what",colhdr="What"}], |
| body=[bkpt={number="1",type="breakpoint",disp="keep",enabled="y", |
| addr="0x000100d0",func="main",file="hello.c",fullname="/home/foo/hello.c", |
| line="5",cond="1",thread-groups=["i1"],times="0",ignore="3"}]} |
| (gdb) |
| </pre> |
| <h4 class="subheading">The <code>-break-delete</code> Command</h4> |
| |
| <p><a name="index-g_t_002dbreak_002ddelete-2985"></a> |
| |
| <h5 class="subsubheading">Synopsis</h5> |
| |
| <pre class="smallexample"> -break-delete ( <var>breakpoint</var> )+ |
| </pre> |
| <p>Delete the breakpoint(s) whose number(s) are specified in the argument |
| list. This is obviously reflected in the breakpoint list. |
| |
| <h5 class="subsubheading"><span class="sc">gdb</span> Command</h5> |
| |
| <p>The corresponding <span class="sc">gdb</span> command is ‘<samp><span class="samp">delete</span></samp>’. |
| |
| <h5 class="subsubheading">Example</h5> |
| |
| <pre class="smallexample"> (gdb) |
| -break-delete 1 |
| ^done |
| (gdb) |
| -break-list |
| ^done,BreakpointTable={nr_rows="0",nr_cols="6", |
| hdr=[{width="3",alignment="-1",col_name="number",colhdr="Num"}, |
| {width="14",alignment="-1",col_name="type",colhdr="Type"}, |
| {width="4",alignment="-1",col_name="disp",colhdr="Disp"}, |
| {width="3",alignment="-1",col_name="enabled",colhdr="Enb"}, |
| {width="10",alignment="-1",col_name="addr",colhdr="Address"}, |
| {width="40",alignment="2",col_name="what",colhdr="What"}], |
| body=[]} |
| (gdb) |
| </pre> |
| <h4 class="subheading">The <code>-break-disable</code> Command</h4> |
| |
| <p><a name="index-g_t_002dbreak_002ddisable-2986"></a> |
| |
| <h5 class="subsubheading">Synopsis</h5> |
| |
| <pre class="smallexample"> -break-disable ( <var>breakpoint</var> )+ |
| </pre> |
| <p>Disable the named <var>breakpoint</var>(s). The field ‘<samp><span class="samp">enabled</span></samp>’ in the |
| break list is now set to ‘<samp><span class="samp">n</span></samp>’ for the named <var>breakpoint</var>(s). |
| |
| <h5 class="subsubheading"><span class="sc">gdb</span> Command</h5> |
| |
| <p>The corresponding <span class="sc">gdb</span> command is ‘<samp><span class="samp">disable</span></samp>’. |
| |
| <h5 class="subsubheading">Example</h5> |
| |
| <pre class="smallexample"> (gdb) |
| -break-disable 2 |
| ^done |
| (gdb) |
| -break-list |
| ^done,BreakpointTable={nr_rows="1",nr_cols="6", |
| hdr=[{width="3",alignment="-1",col_name="number",colhdr="Num"}, |
| {width="14",alignment="-1",col_name="type",colhdr="Type"}, |
| {width="4",alignment="-1",col_name="disp",colhdr="Disp"}, |
| {width="3",alignment="-1",col_name="enabled",colhdr="Enb"}, |
| {width="10",alignment="-1",col_name="addr",colhdr="Address"}, |
| {width="40",alignment="2",col_name="what",colhdr="What"}], |
| body=[bkpt={number="2",type="breakpoint",disp="keep",enabled="n", |
| addr="0x000100d0",func="main",file="hello.c",fullname="/home/foo/hello.c", |
| line="5",thread-groups=["i1"],times="0"}]} |
| (gdb) |
| </pre> |
| <h4 class="subheading">The <code>-break-enable</code> Command</h4> |
| |
| <p><a name="index-g_t_002dbreak_002denable-2987"></a> |
| |
| <h5 class="subsubheading">Synopsis</h5> |
| |
| <pre class="smallexample"> -break-enable ( <var>breakpoint</var> )+ |
| </pre> |
| <p>Enable (previously disabled) <var>breakpoint</var>(s). |
| |
| <h5 class="subsubheading"><span class="sc">gdb</span> Command</h5> |
| |
| <p>The corresponding <span class="sc">gdb</span> command is ‘<samp><span class="samp">enable</span></samp>’. |
| |
| <h5 class="subsubheading">Example</h5> |
| |
| <pre class="smallexample"> (gdb) |
| -break-enable 2 |
| ^done |
| (gdb) |
| -break-list |
| ^done,BreakpointTable={nr_rows="1",nr_cols="6", |
| hdr=[{width="3",alignment="-1",col_name="number",colhdr="Num"}, |
| {width="14",alignment="-1",col_name="type",colhdr="Type"}, |
| {width="4",alignment="-1",col_name="disp",colhdr="Disp"}, |
| {width="3",alignment="-1",col_name="enabled",colhdr="Enb"}, |
| {width="10",alignment="-1",col_name="addr",colhdr="Address"}, |
| {width="40",alignment="2",col_name="what",colhdr="What"}], |
| body=[bkpt={number="2",type="breakpoint",disp="keep",enabled="y", |
| addr="0x000100d0",func="main",file="hello.c",fullname="/home/foo/hello.c", |
| line="5",thread-groups=["i1"],times="0"}]} |
| (gdb) |
| </pre> |
| <h4 class="subheading">The <code>-break-info</code> Command</h4> |
| |
| <p><a name="index-g_t_002dbreak_002dinfo-2988"></a> |
| |
| <h5 class="subsubheading">Synopsis</h5> |
| |
| <pre class="smallexample"> -break-info <var>breakpoint</var> |
| </pre> |
| <!-- REDUNDANT??? --> |
| <p>Get information about a single breakpoint. |
| |
| <p>The result is a table of breakpoints. See <a href="GDB_002fMI-Breakpoint-Information.html#GDB_002fMI-Breakpoint-Information">GDB/MI Breakpoint Information</a>, for details on the format of each breakpoint in the |
| table. |
| |
| <h5 class="subsubheading"><span class="sc">gdb</span> Command</h5> |
| |
| <p>The corresponding <span class="sc">gdb</span> command is ‘<samp><span class="samp">info break </span><var>breakpoint</var></samp>’. |
| |
| <h5 class="subsubheading">Example</h5> |
| |
| <p>N.A. |
| |
| <h4 class="subheading">The <code>-break-insert</code> Command</h4> |
| |
| <p><a name="index-g_t_002dbreak_002dinsert-2989"></a><a name="g_t_002dbreak_002dinsert"></a> |
| |
| <h5 class="subsubheading">Synopsis</h5> |
| |
| <pre class="smallexample"> -break-insert [ -t ] [ -h ] [ -f ] [ -d ] [ -a ] |
| [ -c <var>condition</var> ] [ -i <var>ignore-count</var> ] |
| [ -p <var>thread-id</var> ] [ <var>location</var> ] |
| </pre> |
| <p class="noindent">If specified, <var>location</var>, can be one of: |
| |
| <dl> |
| <dt><var>linespec location</var><dd>A linespec location. See <a href="Linespec-Locations.html#Linespec-Locations">Linespec Locations</a>. |
| |
| <br><dt><var>explicit location</var><dd>An explicit location. <span class="sc">gdb/mi</span> explicit locations are |
| analogous to the CLI's explicit locations using the option names |
| listed below. See <a href="Explicit-Locations.html#Explicit-Locations">Explicit Locations</a>. |
| |
| <dl> |
| <dt>‘<samp><span class="samp">--source </span><var>filename</var></samp>’<dd>The source file name of the location. This option requires the use |
| of either ‘<samp><span class="samp">--function</span></samp>’ or ‘<samp><span class="samp">--line</span></samp>’. |
| |
| <br><dt>‘<samp><span class="samp">--function </span><var>function</var></samp>’<dd>The name of a function or method. |
| |
| <br><dt>‘<samp><span class="samp">--label </span><var>label</var></samp>’<dd>The name of a label. |
| |
| <br><dt>‘<samp><span class="samp">--line </span><var>lineoffset</var></samp>’<dd>An absolute or relative line offset from the start of the location. |
| </dl> |
| |
| <br><dt><var>address location</var><dd>An address location, *<var>address</var>. See <a href="Address-Locations.html#Address-Locations">Address Locations</a>. |
| </dl> |
| |
| <p class="noindent">The possible optional parameters of this command are: |
| |
| <dl> |
| <dt>‘<samp><span class="samp">-t</span></samp>’<dd>Insert a temporary breakpoint. |
| <br><dt>‘<samp><span class="samp">-h</span></samp>’<dd>Insert a hardware breakpoint. |
| <br><dt>‘<samp><span class="samp">-f</span></samp>’<dd>If <var>location</var> cannot be parsed (for example if it |
| refers to unknown files or functions), create a pending |
| breakpoint. Without this flag, <span class="sc">gdb</span> will report |
| an error, and won't create a breakpoint, if <var>location</var> |
| cannot be parsed. |
| <br><dt>‘<samp><span class="samp">-d</span></samp>’<dd>Create a disabled breakpoint. |
| <br><dt>‘<samp><span class="samp">-a</span></samp>’<dd>Create a tracepoint. See <a href="Tracepoints.html#Tracepoints">Tracepoints</a>. When this parameter |
| is used together with ‘<samp><span class="samp">-h</span></samp>’, a fast tracepoint is created. |
| <br><dt>‘<samp><span class="samp">-c </span><var>condition</var></samp>’<dd>Make the breakpoint conditional on <var>condition</var>. |
| <br><dt>‘<samp><span class="samp">-i </span><var>ignore-count</var></samp>’<dd>Initialize the <var>ignore-count</var>. |
| <br><dt>‘<samp><span class="samp">-p </span><var>thread-id</var></samp>’<dd>Restrict the breakpoint to the thread with the specified global |
| <var>thread-id</var>. |
| </dl> |
| |
| <h5 class="subsubheading">Result</h5> |
| |
| <p>See <a href="GDB_002fMI-Breakpoint-Information.html#GDB_002fMI-Breakpoint-Information">GDB/MI Breakpoint Information</a>, for details on the format of the |
| resulting breakpoint. |
| |
| <p>Note: this format is open to change. |
| <!-- An out-of-band breakpoint instead of part of the result? --> |
| |
| <h5 class="subsubheading"><span class="sc">gdb</span> Command</h5> |
| |
| <p>The corresponding <span class="sc">gdb</span> commands are ‘<samp><span class="samp">break</span></samp>’, ‘<samp><span class="samp">tbreak</span></samp>’, |
| ‘<samp><span class="samp">hbreak</span></samp>’, and ‘<samp><span class="samp">thbreak</span></samp>’. <!-- and @samp{rbreak}. --> |
| |
| <h5 class="subsubheading">Example</h5> |
| |
| <pre class="smallexample"> (gdb) |
| -break-insert main |
| ^done,bkpt={number="1",addr="0x0001072c",file="recursive2.c", |
| fullname="/home/foo/recursive2.c,line="4",thread-groups=["i1"], |
| times="0"} |
| (gdb) |
| -break-insert -t foo |
| ^done,bkpt={number="2",addr="0x00010774",file="recursive2.c", |
| fullname="/home/foo/recursive2.c,line="11",thread-groups=["i1"], |
| times="0"} |
| (gdb) |
| -break-list |
| ^done,BreakpointTable={nr_rows="2",nr_cols="6", |
| hdr=[{width="3",alignment="-1",col_name="number",colhdr="Num"}, |
| {width="14",alignment="-1",col_name="type",colhdr="Type"}, |
| {width="4",alignment="-1",col_name="disp",colhdr="Disp"}, |
| {width="3",alignment="-1",col_name="enabled",colhdr="Enb"}, |
| {width="10",alignment="-1",col_name="addr",colhdr="Address"}, |
| {width="40",alignment="2",col_name="what",colhdr="What"}], |
| body=[bkpt={number="1",type="breakpoint",disp="keep",enabled="y", |
| addr="0x0001072c", func="main",file="recursive2.c", |
| fullname="/home/foo/recursive2.c,"line="4",thread-groups=["i1"], |
| times="0"}, |
| bkpt={number="2",type="breakpoint",disp="del",enabled="y", |
| addr="0x00010774",func="foo",file="recursive2.c", |
| fullname="/home/foo/recursive2.c",line="11",thread-groups=["i1"], |
| times="0"}]} |
| (gdb) |
| <!-- break-insert -r foo.* --> |
| <!-- ~int foo(int, int); --> |
| <!-- ^done,bkpt=@{number="3",addr="0x00010774",file="recursive2.c, --> |
| <!-- "fullname="/home/foo/recursive2.c",line="11",thread-groups=["i1"], --> |
| <!-- times="0"@} --> |
| <!-- (gdb) --> |
| </pre> |
| <h4 class="subheading">The <code>-dprintf-insert</code> Command</h4> |
| |
| <p><a name="index-g_t_002ddprintf_002dinsert-2990"></a> |
| |
| <h5 class="subsubheading">Synopsis</h5> |
| |
| <pre class="smallexample"> -dprintf-insert [ -t ] [ -f ] [ -d ] |
| [ -c <var>condition</var> ] [ -i <var>ignore-count</var> ] |
| [ -p <var>thread-id</var> ] [ <var>location</var> ] [ <var>format</var> ] |
| [ <var>argument</var> ] |
| </pre> |
| <p class="noindent">If supplied, <var>location</var> may be specified the same way as for |
| the <code>-break-insert</code> command. See <a href="_002dbreak_002dinsert.html#g_t_002dbreak_002dinsert">-break-insert</a>. |
| |
| <p>The possible optional parameters of this command are: |
| |
| <dl> |
| <dt>‘<samp><span class="samp">-t</span></samp>’<dd>Insert a temporary breakpoint. |
| <br><dt>‘<samp><span class="samp">-f</span></samp>’<dd>If <var>location</var> cannot be parsed (for example, if it |
| refers to unknown files or functions), create a pending |
| breakpoint. Without this flag, <span class="sc">gdb</span> will report |
| an error, and won't create a breakpoint, if <var>location</var> |
| cannot be parsed. |
| <br><dt>‘<samp><span class="samp">-d</span></samp>’<dd>Create a disabled breakpoint. |
| <br><dt>‘<samp><span class="samp">-c </span><var>condition</var></samp>’<dd>Make the breakpoint conditional on <var>condition</var>. |
| <br><dt>‘<samp><span class="samp">-i </span><var>ignore-count</var></samp>’<dd>Set the ignore count of the breakpoint (see <a href="Conditions.html#Conditions">ignore count</a>) |
| to <var>ignore-count</var>. |
| <br><dt>‘<samp><span class="samp">-p </span><var>thread-id</var></samp>’<dd>Restrict the breakpoint to the thread with the specified global |
| <var>thread-id</var>. |
| </dl> |
| |
| <h5 class="subsubheading">Result</h5> |
| |
| <p>See <a href="GDB_002fMI-Breakpoint-Information.html#GDB_002fMI-Breakpoint-Information">GDB/MI Breakpoint Information</a>, for details on the format of the |
| resulting breakpoint. |
| |
| <!-- An out-of-band breakpoint instead of part of the result? --> |
| <h5 class="subsubheading"><span class="sc">gdb</span> Command</h5> |
| |
| <p>The corresponding <span class="sc">gdb</span> command is ‘<samp><span class="samp">dprintf</span></samp>’. |
| |
| <h5 class="subsubheading">Example</h5> |
| |
| <pre class="smallexample"> (gdb) |
| 4-dprintf-insert foo "At foo entry\n" |
| 4^done,bkpt={number="1",type="dprintf",disp="keep",enabled="y", |
| addr="0x000000000040061b",func="foo",file="mi-dprintf.c", |
| fullname="mi-dprintf.c",line="25",thread-groups=["i1"], |
| times="0",script={"printf \"At foo entry\\n\"","continue"}, |
| original-location="foo"} |
| (gdb) |
| 5-dprintf-insert 26 "arg=%d, g=%d\n" arg g |
| 5^done,bkpt={number="2",type="dprintf",disp="keep",enabled="y", |
| addr="0x000000000040062a",func="foo",file="mi-dprintf.c", |
| fullname="mi-dprintf.c",line="26",thread-groups=["i1"], |
| times="0",script={"printf \"arg=%d, g=%d\\n\", arg, g","continue"}, |
| original-location="mi-dprintf.c:26"} |
| (gdb) |
| </pre> |
| <h4 class="subheading">The <code>-break-list</code> Command</h4> |
| |
| <p><a name="index-g_t_002dbreak_002dlist-2991"></a> |
| |
| <h5 class="subsubheading">Synopsis</h5> |
| |
| <pre class="smallexample"> -break-list |
| </pre> |
| <p>Displays the list of inserted breakpoints, showing the following fields: |
| |
| <dl> |
| <dt>‘<samp><span class="samp">Number</span></samp>’<dd>number of the breakpoint |
| <br><dt>‘<samp><span class="samp">Type</span></samp>’<dd>type of the breakpoint: ‘<samp><span class="samp">breakpoint</span></samp>’ or ‘<samp><span class="samp">watchpoint</span></samp>’ |
| <br><dt>‘<samp><span class="samp">Disposition</span></samp>’<dd>should the breakpoint be deleted or disabled when it is hit: ‘<samp><span class="samp">keep</span></samp>’ |
| or ‘<samp><span class="samp">nokeep</span></samp>’ |
| <br><dt>‘<samp><span class="samp">Enabled</span></samp>’<dd>is the breakpoint enabled or no: ‘<samp><span class="samp">y</span></samp>’ or ‘<samp><span class="samp">n</span></samp>’ |
| <br><dt>‘<samp><span class="samp">Address</span></samp>’<dd>memory location at which the breakpoint is set |
| <br><dt>‘<samp><span class="samp">What</span></samp>’<dd>logical location of the breakpoint, expressed by function name, file |
| name, line number |
| <br><dt>‘<samp><span class="samp">Thread-groups</span></samp>’<dd>list of thread groups to which this breakpoint applies |
| <br><dt>‘<samp><span class="samp">Times</span></samp>’<dd>number of times the breakpoint has been hit |
| </dl> |
| |
| <p>If there are no breakpoints or watchpoints, the <code>BreakpointTable</code> |
| <code>body</code> field is an empty list. |
| |
| <h5 class="subsubheading"><span class="sc">gdb</span> Command</h5> |
| |
| <p>The corresponding <span class="sc">gdb</span> command is ‘<samp><span class="samp">info break</span></samp>’. |
| |
| <h5 class="subsubheading">Example</h5> |
| |
| <pre class="smallexample"> (gdb) |
| -break-list |
| ^done,BreakpointTable={nr_rows="2",nr_cols="6", |
| hdr=[{width="3",alignment="-1",col_name="number",colhdr="Num"}, |
| {width="14",alignment="-1",col_name="type",colhdr="Type"}, |
| {width="4",alignment="-1",col_name="disp",colhdr="Disp"}, |
| {width="3",alignment="-1",col_name="enabled",colhdr="Enb"}, |
| {width="10",alignment="-1",col_name="addr",colhdr="Address"}, |
| {width="40",alignment="2",col_name="what",colhdr="What"}], |
| body=[bkpt={number="1",type="breakpoint",disp="keep",enabled="y", |
| addr="0x000100d0",func="main",file="hello.c",line="5",thread-groups=["i1"], |
| times="0"}, |
| bkpt={number="2",type="breakpoint",disp="keep",enabled="y", |
| addr="0x00010114",func="foo",file="hello.c",fullname="/home/foo/hello.c", |
| line="13",thread-groups=["i1"],times="0"}]} |
| (gdb) |
| </pre> |
| <p>Here's an example of the result when there are no breakpoints: |
| |
| <pre class="smallexample"> (gdb) |
| -break-list |
| ^done,BreakpointTable={nr_rows="0",nr_cols="6", |
| hdr=[{width="3",alignment="-1",col_name="number",colhdr="Num"}, |
| {width="14",alignment="-1",col_name="type",colhdr="Type"}, |
| {width="4",alignment="-1",col_name="disp",colhdr="Disp"}, |
| {width="3",alignment="-1",col_name="enabled",colhdr="Enb"}, |
| {width="10",alignment="-1",col_name="addr",colhdr="Address"}, |
| {width="40",alignment="2",col_name="what",colhdr="What"}], |
| body=[]} |
| (gdb) |
| </pre> |
| <h4 class="subheading">The <code>-break-passcount</code> Command</h4> |
| |
| <p><a name="index-g_t_002dbreak_002dpasscount-2992"></a> |
| |
| <h5 class="subsubheading">Synopsis</h5> |
| |
| <pre class="smallexample"> -break-passcount <var>tracepoint-number</var> <var>passcount</var> |
| </pre> |
| <p>Set the passcount for tracepoint <var>tracepoint-number</var> to |
| <var>passcount</var>. If the breakpoint referred to by <var>tracepoint-number</var> |
| is not a tracepoint, error is emitted. This corresponds to CLI |
| command ‘<samp><span class="samp">passcount</span></samp>’. |
| |
| <h4 class="subheading">The <code>-break-watch</code> Command</h4> |
| |
| <p><a name="index-g_t_002dbreak_002dwatch-2993"></a> |
| |
| <h5 class="subsubheading">Synopsis</h5> |
| |
| <pre class="smallexample"> -break-watch [ -a | -r ] |
| </pre> |
| <p>Create a watchpoint. With the ‘<samp><span class="samp">-a</span></samp>’ option it will create an |
| <dfn>access</dfn> watchpoint, i.e., a watchpoint that triggers either on a |
| read from or on a write to the memory location. With the ‘<samp><span class="samp">-r</span></samp>’ |
| option, the watchpoint created is a <dfn>read</dfn> watchpoint, i.e., it will |
| trigger only when the memory location is accessed for reading. Without |
| either of the options, the watchpoint created is a regular watchpoint, |
| i.e., it will trigger when the memory location is accessed for writing. |
| See <a href="Set-Watchpoints.html#Set-Watchpoints">Setting Watchpoints</a>. |
| |
| <p>Note that ‘<samp><span class="samp">-break-list</span></samp>’ will report a single list of watchpoints and |
| breakpoints inserted. |
| |
| <h5 class="subsubheading"><span class="sc">gdb</span> Command</h5> |
| |
| <p>The corresponding <span class="sc">gdb</span> commands are ‘<samp><span class="samp">watch</span></samp>’, ‘<samp><span class="samp">awatch</span></samp>’, and |
| ‘<samp><span class="samp">rwatch</span></samp>’. |
| |
| <h5 class="subsubheading">Example</h5> |
| |
| <p>Setting a watchpoint on a variable in the <code>main</code> function: |
| |
| <pre class="smallexample"> (gdb) |
| -break-watch x |
| ^done,wpt={number="2",exp="x"} |
| (gdb) |
| -exec-continue |
| ^running |
| (gdb) |
| *stopped,reason="watchpoint-trigger",wpt={number="2",exp="x"}, |
| value={old="-268439212",new="55"}, |
| frame={func="main",args=[],file="recursive2.c", |
| fullname="/home/foo/bar/recursive2.c",line="5",arch="i386:x86_64"} |
| (gdb) |
| </pre> |
| <p>Setting a watchpoint on a variable local to a function. <span class="sc">gdb</span> will stop |
| the program execution twice: first for the variable changing value, then |
| for the watchpoint going out of scope. |
| |
| <pre class="smallexample"> (gdb) |
| -break-watch C |
| ^done,wpt={number="5",exp="C"} |
| (gdb) |
| -exec-continue |
| ^running |
| (gdb) |
| *stopped,reason="watchpoint-trigger", |
| wpt={number="5",exp="C"},value={old="-276895068",new="3"}, |
| frame={func="callee4",args=[], |
| file="../../../devo/gdb/testsuite/gdb.mi/basics.c", |
| fullname="/home/foo/bar/devo/gdb/testsuite/gdb.mi/basics.c",line="13", |
| arch="i386:x86_64"} |
| (gdb) |
| -exec-continue |
| ^running |
| (gdb) |
| *stopped,reason="watchpoint-scope",wpnum="5", |
| frame={func="callee3",args=[{name="strarg", |
| value="0x11940 \"A string argument.\""}], |
| file="../../../devo/gdb/testsuite/gdb.mi/basics.c", |
| fullname="/home/foo/bar/devo/gdb/testsuite/gdb.mi/basics.c",line="18", |
| arch="i386:x86_64"} |
| (gdb) |
| </pre> |
| <p>Listing breakpoints and watchpoints, at different points in the program |
| execution. Note that once the watchpoint goes out of scope, it is |
| deleted. |
| |
| <pre class="smallexample"> (gdb) |
| -break-watch C |
| ^done,wpt={number="2",exp="C"} |
| (gdb) |
| -break-list |
| ^done,BreakpointTable={nr_rows="2",nr_cols="6", |
| hdr=[{width="3",alignment="-1",col_name="number",colhdr="Num"}, |
| {width="14",alignment="-1",col_name="type",colhdr="Type"}, |
| {width="4",alignment="-1",col_name="disp",colhdr="Disp"}, |
| {width="3",alignment="-1",col_name="enabled",colhdr="Enb"}, |
| {width="10",alignment="-1",col_name="addr",colhdr="Address"}, |
| {width="40",alignment="2",col_name="what",colhdr="What"}], |
| body=[bkpt={number="1",type="breakpoint",disp="keep",enabled="y", |
| addr="0x00010734",func="callee4", |
| file="../../../devo/gdb/testsuite/gdb.mi/basics.c", |
| fullname="/home/foo/devo/gdb/testsuite/gdb.mi/basics.c"line="8",thread-groups=["i1"], |
| times="1"}, |
| bkpt={number="2",type="watchpoint",disp="keep", |
| enabled="y",addr="",what="C",thread-groups=["i1"],times="0"}]} |
| (gdb) |
| -exec-continue |
| ^running |
| (gdb) |
| *stopped,reason="watchpoint-trigger",wpt={number="2",exp="C"}, |
| value={old="-276895068",new="3"}, |
| frame={func="callee4",args=[], |
| file="../../../devo/gdb/testsuite/gdb.mi/basics.c", |
| fullname="/home/foo/bar/devo/gdb/testsuite/gdb.mi/basics.c",line="13", |
| arch="i386:x86_64"} |
| (gdb) |
| -break-list |
| ^done,BreakpointTable={nr_rows="2",nr_cols="6", |
| hdr=[{width="3",alignment="-1",col_name="number",colhdr="Num"}, |
| {width="14",alignment="-1",col_name="type",colhdr="Type"}, |
| {width="4",alignment="-1",col_name="disp",colhdr="Disp"}, |
| {width="3",alignment="-1",col_name="enabled",colhdr="Enb"}, |
| {width="10",alignment="-1",col_name="addr",colhdr="Address"}, |
| {width="40",alignment="2",col_name="what",colhdr="What"}], |
| body=[bkpt={number="1",type="breakpoint",disp="keep",enabled="y", |
| addr="0x00010734",func="callee4", |
| file="../../../devo/gdb/testsuite/gdb.mi/basics.c", |
| fullname="/home/foo/devo/gdb/testsuite/gdb.mi/basics.c",line="8",thread-groups=["i1"], |
| times="1"}, |
| bkpt={number="2",type="watchpoint",disp="keep", |
| enabled="y",addr="",what="C",thread-groups=["i1"],times="-5"}]} |
| (gdb) |
| -exec-continue |
| ^running |
| ^done,reason="watchpoint-scope",wpnum="2", |
| frame={func="callee3",args=[{name="strarg", |
| value="0x11940 \"A string argument.\""}], |
| file="../../../devo/gdb/testsuite/gdb.mi/basics.c", |
| fullname="/home/foo/bar/devo/gdb/testsuite/gdb.mi/basics.c",line="18", |
| arch="i386:x86_64"} |
| (gdb) |
| -break-list |
| ^done,BreakpointTable={nr_rows="1",nr_cols="6", |
| hdr=[{width="3",alignment="-1",col_name="number",colhdr="Num"}, |
| {width="14",alignment="-1",col_name="type",colhdr="Type"}, |
| {width="4",alignment="-1",col_name="disp",colhdr="Disp"}, |
| {width="3",alignment="-1",col_name="enabled",colhdr="Enb"}, |
| {width="10",alignment="-1",col_name="addr",colhdr="Address"}, |
| {width="40",alignment="2",col_name="what",colhdr="What"}], |
| body=[bkpt={number="1",type="breakpoint",disp="keep",enabled="y", |
| addr="0x00010734",func="callee4", |
| file="../../../devo/gdb/testsuite/gdb.mi/basics.c", |
| fullname="/home/foo/devo/gdb/testsuite/gdb.mi/basics.c",line="8", |
| thread-groups=["i1"],times="1"}]} |
| (gdb) |
| </pre> |
| <!-- %%%%%%%%%%%%%%%%%%%%%%%%%%%% SECTION %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% --> |
| </body></html> |
| |
