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<link rel="icon" href="/images/favicon.ico"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta property="og:title" content="Arthas"><meta property="og:image:alt" content="Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas - alibaba/arthas: Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas"><meta property="og:image" content="/images/arthas_mate_image.png"><meta property="og:description" content="Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas - alibaba/arthas: Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas"><meta property="og:image:width" content="1200"><meta property="og:image:height" content="600"><meta property="twitter:image:src" content="/images/arthas_mate_image.png"><meta property="twitter:image:alt" content="Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas - alibaba/arthas: Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas"><meta itemprop="name" content="Arthas"><meta itemprop="image" content="/images/arthas_mate_image.png"><meta itemprop="description" content="Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas - alibaba/arthas: Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas"><script>
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dashboard <!--[--><!--]--></a></div><!----></li><li data-v-558ea87d data-v-558ea87d><div class="sidebar-tree-row" data-v-558ea87d><span class="sidebar-tree-toggle-placeholder" data-v-558ea87d></span><a href="/doc/dump.html" class="sidebar-item" aria-label="dump" data-v-558ea87d><!--[--><!--]--> dump <!--[--><!--]--></a></div><!----></li><li data-v-558ea87d data-v-558ea87d><div class="sidebar-tree-row" data-v-558ea87d><span class="sidebar-tree-toggle-placeholder" data-v-558ea87d></span><a href="/doc/echo.html" class="sidebar-item" aria-label="echo" data-v-558ea87d><!--[--><!--]--> echo <!--[--><!--]--></a></div><!----></li><li data-v-558ea87d data-v-558ea87d><div class="sidebar-tree-row" data-v-558ea87d><span class="sidebar-tree-toggle-placeholder" data-v-558ea87d></span><a href="/doc/getstatic.html" class="sidebar-item" aria-label="getstatic" data-v-558ea87d><!--[--><!--]--> getstatic <!--[--><!--]--></a></div><!----></li><li data-v-558ea87d data-v-558ea87d><div 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<!--[--><!--]--></a></div><!----></li><li data-v-558ea87d data-v-558ea87d><div class="sidebar-tree-row" data-v-558ea87d><span class="sidebar-tree-toggle-placeholder" data-v-558ea87d></span><a href="/doc/web-console.html" class="sidebar-item" aria-label="Web Console" data-v-558ea87d><!--[--><!--]--> Web Console <!--[--><!--]--></a></div><!----></li><li data-v-558ea87d data-v-558ea87d><div class="sidebar-tree-row" data-v-558ea87d><span class="sidebar-tree-toggle-placeholder" data-v-558ea87d></span><a href="/doc/tunnel.html" class="sidebar-item" aria-label="Arthas Tunnel" data-v-558ea87d><!--[--><!--]--> Arthas Tunnel <!--[--><!--]--></a></div><!----></li><li data-v-558ea87d data-v-558ea87d><div class="sidebar-tree-row" data-v-558ea87d><span class="sidebar-tree-toggle-placeholder" data-v-558ea87d></span><a href="/doc/idea-plugin.html" class="sidebar-item" aria-label="IDEA Plugin" data-v-558ea87d><!--[--><!--]--> IDEA Plugin <!--[--><!--]--></a></div><!----></li><li data-v-558ea87d data-v-558ea87d><div class="sidebar-tree-row" data-v-558ea87d><span class="sidebar-tree-toggle-placeholder" data-v-558ea87d></span><a href="/doc/arthas-properties.html" class="sidebar-item" aria-label="Arthas Properties" data-v-558ea87d><!--[--><!--]--> Arthas Properties <!--[--><!--]--></a></div><!----></li><li data-v-558ea87d data-v-558ea87d><div class="sidebar-tree-row" data-v-558ea87d><span class="sidebar-tree-toggle-placeholder" data-v-558ea87d></span><a href="/doc/agent.html" class="sidebar-item" aria-label="以 Java Agent 的方式启动" data-v-558ea87d><!--[--><!--]--> 以 Java Agent 的方式启动 <!--[--><!--]--></a></div><!----></li><li data-v-558ea87d data-v-558ea87d><div class="sidebar-tree-row" data-v-558ea87d><span class="sidebar-tree-toggle-placeholder" data-v-558ea87d></span><a href="/doc/spring-boot-starter.html" class="sidebar-item" aria-label="Arthas Spring Boot Starter" data-v-558ea87d><!--[--><!--]--> Arthas Spring Boot Starter <!--[--><!--]--></a></div><!----></li><li data-v-558ea87d data-v-558ea87d><div class="sidebar-tree-row" data-v-558ea87d><span class="sidebar-tree-toggle-placeholder" data-v-558ea87d></span><a href="/doc/external-command.html" class="sidebar-item" aria-label="加载外部命令" data-v-558ea87d><!--[--><!--]--> 加载外部命令 <!--[--><!--]--></a></div><!----></li><li data-v-558ea87d data-v-558ea87d><div class="sidebar-tree-row" data-v-558ea87d><span class="sidebar-tree-toggle-placeholder" data-v-558ea87d></span><a href="/doc/http-api.html" class="sidebar-item" aria-label="Http API" data-v-558ea87d><!--[--><!--]--> Http API <!--[--><!--]--></a></div><!----></li><li data-v-558ea87d data-v-558ea87d><div class="sidebar-tree-row" data-v-558ea87d><span class="sidebar-tree-toggle-placeholder" data-v-558ea87d></span><a href="/doc/batch-support.html" class="sidebar-item" aria-label="批处理功能" data-v-558ea87d><!--[--><!--]--> 批处理功能 <!--[--><!--]--></a></div><!----></li><!--]--></ul></li><li data-v-558ea87d data-v-558ea87d><div class="sidebar-tree-row" data-v-558ea87d><span class="sidebar-tree-toggle-placeholder" data-v-558ea87d></span><a href="/doc/faq.html" class="sidebar-item" aria-label="FAQ" data-v-558ea87d><!--[--><!--]--> FAQ <!--[--><!--]--></a></div><!----></li><li data-v-558ea87d data-v-558ea87d><div class="sidebar-tree-row" data-v-558ea87d><span class="sidebar-tree-toggle-placeholder" data-v-558ea87d></span><a class="external-link sidebar-item" href="https://github.com/alibaba/arthas/issues?q=label%3Auser-case" rel="noopener noreferrer" target="_blank" aria-label="用户案例" data-v-558ea87d><!--[--><!--]--><span>用户案例</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">在新窗口打开</span></span><!--[--><!--]--></a></div><!----></li><li data-v-558ea87d data-v-558ea87d><div class="sidebar-tree-row" data-v-558ea87d><span class="sidebar-tree-toggle-placeholder" data-v-558ea87d></span><a class="external-link sidebar-item" href="https://github.com/alibaba/arthas" rel="noopener noreferrer" target="_blank" aria-label="Star me at github" data-v-558ea87d><!--[--><!--]--><span>Star me at github</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">在新窗口打开</span></span><!--[--><!--]--></a></div><!----></li><li data-v-558ea87d data-v-558ea87d><div class="sidebar-tree-row" data-v-558ea87d><span class="sidebar-tree-toggle-placeholder" data-v-558ea87d></span><a class="external-link sidebar-item" href="https://github.com/alibaba/arthas/blob/master/CONTRIBUTING.md" rel="noopener noreferrer" target="_blank" aria-label="编译调试/参与贡献" data-v-558ea87d><!--[--><!--]--><span>编译调试/参与贡献</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">在新窗口打开</span></span><!--[--><!--]--></a></div><!----></li><li data-v-558ea87d data-v-558ea87d><div class="sidebar-tree-row" data-v-558ea87d><span class="sidebar-tree-toggle-placeholder" data-v-558ea87d></span><a class="external-link sidebar-item" href="https://github.com/alibaba/arthas/releases" rel="noopener noreferrer" target="_blank" aria-label="Release Notes" data-v-558ea87d><!--[--><!--]--><span>Release Notes</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">在新窗口打开</span></span><!--[--><!--]--></a></div><!----></li><li data-v-558ea87d data-v-558ea87d><div class="sidebar-tree-row" data-v-558ea87d><span class="sidebar-tree-toggle-placeholder" data-v-558ea87d></span><a href="/doc/contact-us.md" class="sidebar-item" aria-label="QQ 群/钉钉群" data-v-558ea87d><!--[--><!--]--> QQ 群/钉钉群 <!--[--><!--]--></a></div><!----></li><!--]--></ul></li><!--]--></ul><!--]--><!--[--><!--]--></aside><!--]--><!--[--><main class="page" data-v-fdd717e0><!--[--><!--]--><div class="right-menu-padding theme-default-content" data-v-fdd717e0><!--[--><!--]--><div class="right-menu-wrapper" data-v-fdd717e0 data-v-64666cd5><div class="right-menu-margin" data-v-64666cd5><div class="right-menu-title" data-v-64666cd5>目录</div><div class="right-menu-content" data-v-64666cd5><!--[--><!--]--></div></div></div><div data-v-fdd717e0><h1 id="stack" tabindex="-1"><a class="header-anchor" href="#stack" aria-hidden="true">#</a> stack</h1><div class="custom-container tip"><p class="custom-container-title">提示</p><p>输出当前方法被调用的调用路径</p></div><p>很多时候我们都知道一个方法被执行,但这个方法被执行的路径非常多,或者你根本就不知道这个方法是从那里被执行了,此时你需要的是 stack 命令。</p><h2 id="参数说明" tabindex="-1"><a class="header-anchor" href="#参数说明" aria-hidden="true">#</a> 参数说明</h2><table><thead><tr><th style="text-align:right;">参数名称</th><th style="text-align:left;">参数说明</th></tr></thead><tbody><tr><td style="text-align:right;"><em>class-pattern</em></td><td style="text-align:left;">类名表达式匹配</td></tr><tr><td style="text-align:right;"><em>method-pattern</em></td><td style="text-align:left;">方法名表达式匹配</td></tr><tr><td style="text-align:right;"><em>condition-express</em></td><td style="text-align:left;">条件表达式</td></tr><tr><td style="text-align:right;">[E]</td><td style="text-align:left;">开启正则表达式匹配,默认为通配符匹配</td></tr><tr><td style="text-align:right;"><code>[n:]</code></td><td style="text-align:left;">执行次数限制</td></tr><tr><td style="text-align:right;"><code>[c:]</code></td><td style="text-align:left;">指定 classloader hash,只增强该 classloader 加载的类</td></tr><tr><td style="text-align:right;"><code>[m &lt;arg&gt;]</code></td><td style="text-align:left;">指定 Class 最大匹配数量,默认值为 50。长格式为<code>[maxMatch &lt;arg&gt;]</code>。</td></tr></tbody></table><p>这里重点要说明的是观察表达式,观察表达式的构成主要由 ognl 表达式组成,所以你可以这样写<code>&quot;{params,returnObj}&quot;</code>,只要是一个合法的 ognl 表达式,都能被正常支持。</p><p>观察的维度也比较多,主要体现在参数 <code>advice</code> 的数据结构上。<code>Advice</code> 参数最主要是封装了通知节点的所有信息。</p><p>请参考<a href="/doc/advice-class.html" class="">表达式核心变量</a>中关于该节点的描述。</p><ul><li><a href="/doc/ognl-express.html" class="">OGNL 复杂表达式使用技巧</a></li></ul><h2 id="使用例子" tabindex="-1"><a class="header-anchor" href="#使用例子" aria-hidden="true">#</a> 使用例子</h2><h3 id="启动-demo" tabindex="-1"><a class="header-anchor" href="#启动-demo" aria-hidden="true">#</a> 启动 Demo</h3><p>启动<a href="/doc/quick-start.html" class="">快速入门</a>里的<code>math-game</code>。</p><h3 id="stack-1" tabindex="-1"><a class="header-anchor" href="#stack-1" aria-hidden="true">#</a> stack</h3><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ stack demo.MathGame primeFactors
Press Ctrl+C to abort.
Affect<span class="token punctuation">(</span>class-cnt:1 , method-cnt:1<span class="token punctuation">)</span> cost <span class="token keyword">in</span> <span class="token number">36</span> ms.
<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2018</span>-12-04 01:32:19<span class="token punctuation">;</span><span class="token assign-left variable">thread_name</span><span class="token operator">=</span>main<span class="token punctuation">;</span><span class="token assign-left variable">id</span><span class="token operator">=</span><span class="token number">1</span><span class="token punctuation">;</span><span class="token assign-left variable">is_daemon</span><span class="token operator">=</span>false<span class="token punctuation">;</span><span class="token assign-left variable">priority</span><span class="token operator">=</span><span class="token number">5</span><span class="token punctuation">;</span><span class="token assign-left variable">TCCL</span><span class="token operator">=</span>sun.misc.Launcher<span class="token variable">$AppClassLoader</span>@3d4eac69
@demo.MathGame.run<span class="token punctuation">(</span><span class="token punctuation">)</span>
at demo.MathGame.main<span class="token punctuation">(</span>MathGame.java:16<span class="token punctuation">)</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="指定-class-最大匹配数量" tabindex="-1"><a class="header-anchor" href="#指定-class-最大匹配数量" aria-hidden="true">#</a> 指定 Class 最大匹配数量</h3><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ stack demo.MathGame primeFactors <span class="token parameter variable">-m</span> <span class="token number">1</span>
Press Q or Ctrl+C to abort.
Affect<span class="token punctuation">(</span>class count:1 , method count:1<span class="token punctuation">)</span> cost <span class="token keyword">in</span> <span class="token number">561</span> ms, listenerId: <span class="token number">5</span>.
<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2022</span>-12-25 <span class="token number">21</span>:07:07<span class="token punctuation">;</span><span class="token assign-left variable">thread_name</span><span class="token operator">=</span>main<span class="token punctuation">;</span><span class="token assign-left variable">id</span><span class="token operator">=</span><span class="token number">1</span><span class="token punctuation">;</span><span class="token assign-left variable">is_daemon</span><span class="token operator">=</span>false<span class="token punctuation">;</span><span class="token assign-left variable">priority</span><span class="token operator">=</span><span class="token number">5</span><span class="token punctuation">;</span><span class="token assign-left variable">TCCL</span><span class="token operator">=</span>sun.misc.Launcher<span class="token variable">$AppClassLoader</span>@b4aac2
@demo.MathGame.primeFactors<span class="token punctuation">(</span><span class="token punctuation">)</span>
at demo.MathGame.run<span class="token punctuation">(</span>MathGame.java:46<span class="token punctuation">)</span>
at demo.MathGame.main<span class="token punctuation">(</span>MathGame.java:38<span class="token punctuation">)</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="指定-classloader-增强" tabindex="-1"><a class="header-anchor" href="#指定-classloader-增强" aria-hidden="true">#</a> 指定 ClassLoader 增强</h3><p>当同名类被多个 classloader 加载时,可以先用 <code>sc -d</code> 查看 classloader hash,然后用 <code>-c</code> 指定增强的 classloader:</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>sc <span class="token parameter variable">-d</span> com.example.Foo
stack <span class="token parameter variable">-c</span> 3d4eac69 com.example.Foo bar
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="据条件表达式来过滤" tabindex="-1"><a class="header-anchor" href="#据条件表达式来过滤" aria-hidden="true">#</a> 据条件表达式来过滤</h3><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ stack demo.MathGame primeFactors <span class="token string">&#39;params[0]&lt;0&#39;</span> <span class="token parameter variable">-n</span> <span class="token number">2</span>
Press Ctrl+C to abort.
Affect<span class="token punctuation">(</span>class-cnt:1 , method-cnt:1<span class="token punctuation">)</span> cost <span class="token keyword">in</span> <span class="token number">30</span> ms.
<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2018</span>-12-04 01:34:27<span class="token punctuation">;</span><span class="token assign-left variable">thread_name</span><span class="token operator">=</span>main<span class="token punctuation">;</span><span class="token assign-left variable">id</span><span class="token operator">=</span><span class="token number">1</span><span class="token punctuation">;</span><span class="token assign-left variable">is_daemon</span><span class="token operator">=</span>false<span class="token punctuation">;</span><span class="token assign-left variable">priority</span><span class="token operator">=</span><span class="token number">5</span><span class="token punctuation">;</span><span class="token assign-left variable">TCCL</span><span class="token operator">=</span>sun.misc.Launcher<span class="token variable">$AppClassLoader</span>@3d4eac69
@demo.MathGame.run<span class="token punctuation">(</span><span class="token punctuation">)</span>
at demo.MathGame.main<span class="token punctuation">(</span>MathGame.java:16<span class="token punctuation">)</span>
<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2018</span>-12-04 01:34:30<span class="token punctuation">;</span><span class="token assign-left variable">thread_name</span><span class="token operator">=</span>main<span class="token punctuation">;</span><span class="token assign-left variable">id</span><span class="token operator">=</span><span class="token number">1</span><span class="token punctuation">;</span><span class="token assign-left variable">is_daemon</span><span class="token operator">=</span>false<span class="token punctuation">;</span><span class="token assign-left variable">priority</span><span class="token operator">=</span><span class="token number">5</span><span class="token punctuation">;</span><span class="token assign-left variable">TCCL</span><span class="token operator">=</span>sun.misc.Launcher<span class="token variable">$AppClassLoader</span>@3d4eac69
@demo.MathGame.run<span class="token punctuation">(</span><span class="token punctuation">)</span>
at demo.MathGame.main<span class="token punctuation">(</span>MathGame.java:16<span class="token punctuation">)</span>
Command execution <span class="token builtin class-name">times</span> exceed limit: <span class="token number">2</span>, so <span class="token builtin class-name">command</span> will exit. You can <span class="token builtin class-name">set</span> it with <span class="token parameter variable">-n</span> option.
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="据执行时间来过滤" tabindex="-1"><a class="header-anchor" href="#据执行时间来过滤" aria-hidden="true">#</a> 据执行时间来过滤</h3><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ stack demo.MathGame primeFactors <span class="token string">&#39;#cost&gt;5&#39;</span>
Press Ctrl+C to abort.
Affect<span class="token punctuation">(</span>class-cnt:1 , method-cnt:1<span class="token punctuation">)</span> cost <span class="token keyword">in</span> <span class="token number">35</span> ms.
<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2018</span>-12-04 01:35:58<span class="token punctuation">;</span><span class="token assign-left variable">thread_name</span><span class="token operator">=</span>main<span class="token punctuation">;</span><span class="token assign-left variable">id</span><span class="token operator">=</span><span class="token number">1</span><span class="token punctuation">;</span><span class="token assign-left variable">is_daemon</span><span class="token operator">=</span>false<span class="token punctuation">;</span><span class="token assign-left variable">priority</span><span class="token operator">=</span><span class="token number">5</span><span class="token punctuation">;</span><span class="token assign-left variable">TCCL</span><span class="token operator">=</span>sun.misc.Launcher<span class="token variable">$AppClassLoader</span>@3d4eac69
@demo.MathGame.run<span class="token punctuation">(</span><span class="token punctuation">)</span>
at demo.MathGame.main<span class="token punctuation">(</span>MathGame.java:16<span class="token punctuation">)</span>
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