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<a href="https://github.com/alibaba/arthas/blob/master/site/src/site/sphinx/en/redefine.md" class="fa fa-github"> Edit on GitHub</a>
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<div class="section" id="redefine">
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<span id="redefine"></span><h1>redefine<a class="headerlink" href="#redefine" title="Permalink to this headline">¶</a></h1>
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<blockquote>
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<div>Load the external <code class="docutils literal notranslate"><span class="pre">*.class</span></code> files to re-define the loaded peer class in JVM.</div></blockquote>
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<p>Reference: <a class="reference external" href="https://docs.oracle.com/javase/8/docs/api/java/lang/instrument/Instrumentation.html#redefineClasses-java.lang.instrument.ClassDefinition...-">Instrumentation#redefineClasses</a></p>
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<blockquote>
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<div>Notes: Re-defined classes cannot be restored. There are chances that redefining may fail due to some reasons, for example: there’s new field introduced in the new version of the class, pls. refer to JDK’s documentation for the limitations.</div></blockquote>
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<span id="options"></span><h2>Options<a class="headerlink" href="#options" title="Permalink to this headline">¶</a></h2>
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<tbody>
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<tr>
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<td align="right"><code>[c:]</code></td>
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<td align="left">hashcode of the class loader</td>
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</tr>
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<tr>
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<td align="right"><code>[p:]</code></td>
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<td align="left">absolute path of the external <code>*.class</code>, multiple paths are separated with 'space'</td>
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<div class="section" id="usage">
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<span id="usage"></span><h2>Usage<a class="headerlink" href="#usage" title="Permalink to this headline">¶</a></h2>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>redefine -p /tmp/Test.class
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redefine -c 327a647b -p /tmp/Test.class /tmp/Test$Inner.class
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</pre></div>
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