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${ item.name }
Create tag ${ searchTerm }
Create branch ${ searchTerm }
from '628f3e71ef'
${ noResults }
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<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1">
<meta name="generator" content="VuePress 2.0.0-beta.49">
<style>
:root {
--c-bg: #fff;
}
html.dark {
--c-bg: #22272e;
}
html, body {
background-color: var(--c-bg);
}
</style>
<script>
const userMode = localStorage.getItem('vuepress-color-scheme');
const systemDarkMode = window.matchMedia && window.matchMedia('(prefers-color-scheme: dark)').matches;
if (userMode === 'dark' || (userMode !== 'light' && systemDarkMode)) {
document.documentElement.classList.toggle('dark', true);
}
</script>
<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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var hm = document.createElement("script");
hm.src = "https://hm.baidu.com/hm.js?d5c5e25b100f0eb51a4c35c8a86ea9b4";
var s = document.getElementsByTagName("script")[0];
s.parentNode.insertBefore(hm, s);
})();
</script><title>options | arthas</title><meta name="description" content="arthas 使用文档">
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href="/doc/contact-us.md" class="sidebar-item" aria-label="QQ群/钉钉群"><!--[--><!--]--> QQ群/钉钉群 <!--[--><!--]--></a><!----></li><!--]--></ul></li><!--]--></ul><!--[--><!--]--></aside><!--]--><!--[--><main class="page" data-v-e0e60120><!--[--><!--]--><div class="right-menu-padding theme-default-content" data-v-e0e60120><!--[--><!--]--><div class="right-menu-wrapper" data-v-e0e60120 data-v-7f642c19><div class="right-menu-margin" data-v-7f642c19><div class="right-menu-title" data-v-7f642c19>目录</div><div class="right-menu-content" data-v-7f642c19><!--[--><!--]--></div></div></div><div data-v-e0e60120><h1 id="options" tabindex="-1"><a class="header-anchor" href="#options" aria-hidden="true">#</a> options</h1><p><a href="https://arthas.aliyun.com/doc/arthas-tutorials.html?language=cn&amp;id=command-options" target="_blank" rel="noopener noreferrer"><code>options</code>在线教程<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></p><div class="custom-container tip"><p class="custom-container-title">提示</p><p>全局开关</p></div><table><thead><tr><th>名称</th><th>默认值</th><th>描述</th></tr></thead><tbody><tr><td>unsafe</td><td>false</td><td>是否支持对系统级别的类进行增强，打开该开关可能导致把 JVM 搞挂，请慎重选择！</td></tr><tr><td>dump</td><td>false</td><td>是否支持被增强了的类 dump 到外部文件中，如果打开开关，class 文件会被 dump 到<code>/${application working dir}/arthas-class-dump/</code>目录下，具体位置详见控制台输出</td></tr><tr><td>batch-re-transform</td><td>true</td><td>是否支持批量对匹配到的类执行 retransform 操作</td></tr><tr><td>json-format</td><td>false</td><td>是否支持 json 化的输出</td></tr><tr><td>disable-sub-class</td><td>false</td><td>是否禁用子类匹配，默认在匹配目标类的时候会默认匹配到其子类，如果想精确匹配，可以关闭此开关</td></tr><tr><td>support-default-method</td><td>true</td><td>是否支持匹配到 default method， 默认会查找 interface，匹配里面的 default method。参考 <a href="https://github.com/alibaba/arthas/issues/1105" target="_blank" rel="noopener noreferrer">#1105<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></td></tr><tr><td>save-result</td><td>false</td><td>是否打开执行结果存日志功能，打开之后所有命令的运行结果都将保存到<code>~/logs/arthas-cache/result.log</code>中</td></tr><tr><td>job-timeout</td><td>1d</td><td>异步后台任务的默认超时时间，超过这个时间，任务自动停止； 比如设置 1d, 2h, 3m, 25s，分别代表天、小时、分、秒</td></tr><tr><td>print-parent-fields</td><td>true</td><td>是否打印在 parent class 里的 filed</td></tr><tr><td>verbose</td><td>false</td><td>是否打  印更多详细信息</td></tr><tr><td>strict</td><td>true</td><td>是否启用 strict 模式</td></tr></tbody></table><h3 id="查看所有的-options" tabindex="-1"><a class="header-anchor" href="#查看所有的-options" aria-hidden="true">#</a> 查看所有的 options</h3><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ options
LEVEL TYPE NAME VALUE SUMMARY DESCRIPTION
-------------------------------------------------------------------------------------------------------
<span class="token number">0</span> boolea unsafe <span class="token boolean">false</span> Option to support sy This option enables to proxy functionality
n stem-level class of JVM classes. Due to serious security r
isk a JVM crash is possibly be introduced.
Do not activate it unless you are able to
manage.
<span class="token number">1</span> boolea dump <span class="token boolean">false</span> Option to dump the e This option enables the enhanced classes t
n nhanced classes o be dumped to external <span class="token function">file</span> <span class="token keyword">for</span> further d
e-compilation and analysis.
<span class="token number">1</span> boolea batch-re-tra <span class="token boolean">true</span> Option to support ba This options enables to reTransform classe
n nsform tch reTransform Clas s with batch mode.
s
<span class="token number">2</span> boolea json-format <span class="token boolean">false</span> Option to support JS This option enables to <span class="token function">format</span> object outpu
n ON <span class="token function">format</span> of object t with JSON when -x option selected.
output
<span class="token number">1</span> boolea disable-sub- <span class="token boolean">false</span> Option to control <span class="token keyword">in</span> This option disable to include sub class w
n class clude sub class when hen matching class.
class matching
<span class="token number">1</span> boolea support-defa <span class="token boolean">true</span> Option to control <span class="token keyword">in</span> This option disable to include default met
n ult-method clude default method hod <span class="token keyword">in</span> interface when matching class.
<span class="token keyword">in</span> interface when c
lass matching
<span class="token number">1</span> boolea save-result <span class="token boolean">false</span> Option to print <span class="token function">comm</span> This option enables to save each <span class="token builtin class-name">command</span><span class="token string">&#39;s
n and&#39;</span>s result to log result to log file, <span class="token function">which</span> path is <span class="token variable">${user.
file home}</span>/logs/arthas-cache/result.log.
<span class="token number">2</span> String job-timeout 1d Option to job timeou This option setting job timeout,The unit c
t an be d, h, m, s <span class="token keyword">for</span> day, hour, minute, se
cond. 1d is one day <span class="token keyword">in</span> default
<span class="token number">1</span> boolea print-parent <span class="token boolean">true</span> Option to print all This option enables print files <span class="token keyword">in</span> parent
n -fields fileds <span class="token keyword">in</span> parent cla class, default value true.
ss
<span class="token number">1</span> boolea verbose <span class="token boolean">false</span> Option to print verb This option enables print verbose informat
n ose information ion, default value false.
<span class="token number">1</span> boolea strict <span class="token boolean">true</span> Option to strict mod By default, strict mode is true, not allow
n e ed to <span class="token builtin class-name">set</span> object properties. Want to <span class="token builtin class-name">set</span> o
bject properties, execute <span class="token variable"><span class="token variable">`</span>options strict
<span class="token boolean">false</span><span class="token variable">`</span></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 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 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 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="获取-option-的值" tabindex="-1"><a class="header-anchor" href="#获取-option-的值" aria-hidden="true">#</a> 获取 option 的值</h3><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>$ options json-format
LEVEL TYPE NAME VALUE SUMMARY DESCRIPTION
--------------------------------------------------------------------------------------------
2 bool json-format false Option to support This option enables to format object
ean JSON format of obj output with JSON when -x option selec
ect output ted.
</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><div class="custom-container tip"><p class="custom-container-title">提示</p><p>默认情况下<code>json-format</code>为 false，如果希望<code>watch</code>/<code>tt</code>等命令结果以 json 格式输出，则可以设置<code>json-format</code>为 true。</p></div><h3 id="设置指定的-option" tabindex="-1"><a class="header-anchor" href="#设置指定的-option" aria-hidden="true">#</a> 设置指定的 option</h3><p>例如，想打开执行结果存日志功能，输入如下命令即可：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>$ options save-result true
NAME BEFORE-VALUE AFTER-VALUE
----------------------------------------
save-result false true
</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></div><h3 id="打开-unsafe-开关-支持-jdk-package-下的类" tabindex="-1"><a class="header-anchor" href="#打开-unsafe-开关-支持-jdk-package-下的类" aria-hidden="true">#</a> 打开 unsafe 开关，支持 jdk package 下的类</h3><p>默认情况下，<code>watch</code>/<code>trace</code>/<code>tt</code>/<code>trace</code>/<code>monitor</code>等命令不支持<code>java.*</code> package 下的类。可以设置<code>unsafe</code>为 true，则可以增强。</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ options unsafe <span class="token boolean">true</span>
NAME BEFORE-VALUE AFTER-VALUE
-----------------------------------
unsafe <span class="token boolean">false</span> <span class="token boolean">true</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></div><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ <span class="token function">watch</span> java.lang.invoke.Invokers callSiteForm
Press Q or Ctrl+C to abort.
Affect<span class="token punctuation">(</span>class count: <span class="token number">1</span> , method count: <span class="token number">1</span><span class="token punctuation">)</span> cost <span class="token keyword">in</span> <span class="token number">61</span> ms, listenerId: <span class="token number">1</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></div><h3 id="关闭-strict-模式-允许在-ognl-表达式里设置对象属性" tabindex="-1"><a class="header-anchor" href="#关闭-strict-模式-允许在-ognl-表达式里设置对象属性" aria-hidden="true">#</a> 关闭 strict 模式，允许在 ognl 表达式里设置对象属性</h3><div class="custom-container tip"><p class="custom-container-title">提示</p><p>since 3.6.0</p></div><p>对于新用户，在编写 ognl 表达式时，可能会出现误用。</p><p>比如对于<code>Student</code>，判断年龄等于 18 时，可能条件表达式会误写为<code>target.age=18</code>，这个表达式实际上是把当前对象的<code>age</code>设置为 18 了。正确的写法是<code>target.age==18</code>。</p><p>为了防止出现类似上面的误用，Arthas 默认启用<code>strict</code>模式，在<code>ognl</code>表达式里，禁止更新对象的 Property 或者调用<code>setter</code>函数。</p><p>以<code>MathGame</code>为例，会出现以下的错误提示。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>$ watch demo.MathGame primeFactors &#39;target&#39; &#39;target.illegalArgumentCount=1&#39;
Press Q or Ctrl+C to abort.
Affect(class count: 1 , method count: 1) cost in 206 ms, listenerId: 1
watch failed, condition is: target.illegalArgumentCount=1, express is: target, By default, strict mode is true, not allowed to set object properties. Want to set object properties, execute `options strict false`, visit /Users/admin/logs/arthas/arthas.log for more details.
</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></div><p>用户如果确定要在<code>ognl</code>表达式里更新对象，可以执行<code>options strict false</code>，关闭<code>strict</code>模式。</p><ul><li>更多信息参考： https://github.com/alibaba/arthas/issues/2128</li></ul></div><!--[--><!--]--></div><footer class="page-meta right-menu-padding" data-v-e0e60120><div class="meta-item edit-link"><a class="external-link meta-item-label" href="https://github.com/alibaba/arthas/edit/master/site/docs/doc/options.md" rel="noopener noreferrer" target="_blank" aria-label="在 GitHub 上编辑此页"><!--[--><!--]--><span>在 GitHub 上编辑此页</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><div class="meta-item last-updated"><span class="meta-item-label">Last Updated: </span><!----></div><div class="meta-item contributors"><span class="meta-item-label">贡献者: </span><span class="meta-item-info"><!--[--><!--[--><span class="contributor" title="email: hengyunabc@gmail.com">hengyunabc</span><!--[-->, <!--]--><!--]--><!--[--><span class="contributor" title="email: hollowman186@vip.qq.com">Hollow Man</span><!--[-->, <!--]--><!--]--><!--[--><span class="contributor" title="email: zzilovey@gmail.com">qianmoke</span><!----><!--]--><!--]--></span></div></footer><!----><!--[--><!--]--></main><!--]--></div><!----><!--]--></div>
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