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GDB命令简介.html
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GDB命令简介
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<p>GDB命令简单总结。<span id="more"></span></p>
<h1 id="命令"><a href="#命令" class="headerlink" title="命令"></a>命令</h1><style>
table
th:first-of-type { width: 20%; }
th:nth-of-type(2) { width: 55%; }
th:nth-of-type(3) { width: 25%; }
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<table>
<thead>
<tr>
<th align="left">命令</th>
<th>解释</th>
<th>示例</th>
</tr>
</thead>
<tbody><tr>
<td align="left">file <文件名></td>
<td>加载被调试的可执行程序文件。<br />一般都在被调试程序所在目录下执行GDB，因而文本名不需要带路径。</td>
<td>(gdb) file gdb-sample</td>
</tr>
<tr>
<td align="left">r</td>
<td>Run的简写，运行被调试的程序。<br/>如果此前没有下过断点，则执行完整个程序；如果有断点，则程序暂停在第一个可用断点处。</td>
<td>(gdb) r</td>
</tr>
<tr>
<td align="left">c</td>
<td>Continue的简写，继续执行被调试程序，直至下一个断点或程序结束。</td>
<td>(gdb) c</td>
</tr>
<tr>
<td align="left">b <行号> <br />b <函数名称> <br />b *<函数名称> <br />b *<代码地址> <br />d [编号]</td>
<td>b: Breakpoint的简写，设置断点。两可以使用“行号”“函数名称”“执行地址”等方式指定断点位置。<br/>其中在函数名称前面加“*”符号表示将断点设置在“由编译器生成的prolog代码处”。如果不了解汇编，可以不予理会此用法。<br/>d: Delete breakpoint的简写，删除指定编号的某个断点，或删除所有断点。断点编号从1开始递增。</td>
<td>(gdb) b 8 <br />(gdb) b main <br />(gdb) b *main <br />(gdb) b *0x804835c</td>
</tr>
<tr>
<td align="left">s, n</td>
<td>s: 执行一行源程序代码，如果此行代码中有函数调用，则进入该函数；<br /> n: 执行一行源程序代码，此行代码中的函数调用也一并执行；<br />s 相当于其它调试器中的“Step Into (单步跟踪进入)”； <br />n 相当于其它调试器中的“Step Over (单步跟踪)”。<br />这两个命令必须在有源代码调试信息的情况下才可以使用（GCC编译时使用“-g”参数）。</td>
<td>(gdb) s<br/>(gdb) n</td>
</tr>
<tr>
<td align="left">si, ni</td>
<td>si命令类似于s命令，ni命令类似于n命令。所不同的是，这两个命令（si/ni）所针对的是汇编指令，而s/n针对的是源代码。</td>
<td>(gdb) si<br/>(gdb) ni</td>
</tr>
<tr>
<td align="left">p <变量名称></td>
<td>Print的简写，显示指定变量（临时变量或全局变量）的值。</td>
<td>(gdb) p i<br/>(gdb) p nGlobalVar</td>
</tr>
<tr>
<td align="left">display … <br />undisplay <编号></td>
<td>display，设置程序中断后欲显示的数据及其格式。<br />例如，如果希望每次程序中断后可以看到即将被执行的下一条汇编指令，可以使用命令<code>display /i $pc</code>其中<code>$pc</code>代表当前汇编指令，<code>/i</code>表示以十六进行显示。当需要关心汇编代码时，此命令相当有用。<br />undispaly，取消先前的display设置，编号从1开始递增。</td>
<td>(gdb) display /i $pc<br />(gdb) undisplay 1</td>
</tr>
<tr>
<td align="left">i</td>
<td>Info的简写，用于显示各类信息，详情请查阅“help i”。</td>
<td>(gdb) i r</td>
</tr>
<tr>
<td align="left">q</td>
<td>Quit的简写，退出GDB调试环境。</td>
<td>(gdb) q</td>
</tr>
<tr>
<td align="left">help [命令名称]</td>
<td>GDB帮助命令，提供对GDB名种命令的解释说明。<br/>如果指定了“命令名称”参数，则显示该命令的详细说明；如果没有指定参数，则分类显示所有GDB命令，供用户进一步浏览和查询。</td>
<td>(gdb) help display</td>
</tr>
</tbody></table>
<h1 id="实践"><a href="#实践" class="headerlink" title="实践"></a>实践</h1><p>未完待续—</p>
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<strong>版权声明： </strong>本博客所有文章除特别声明外，均采用 <a href="https://creativecommons.org/licenses/by-nc-sa/4.0/zh-cn" rel="noopener" target="_blank"><i class="fab fa-fw fa-creative-commons"></i>BY-NC-SA</a> 许可协议。转载请注明出处！
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