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Press Q or Ctrl+C to abort.
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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">32</span> ms, listenerId: <span class="token number">5</span>
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<span class="token assign-left variable">method</span><span class="token operator">=</span>demo.MathGame.primeFactors <span class="token assign-left variable">location</span><span class="token operator">=</span>AtExceptionExit
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<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2021</span>-08-31 <span class="token number">15</span>:22:57<span class="token punctuation">;</span> <span class="token punctuation">[</span>cost<span class="token operator">=</span><span class="token number">0</span>.220625ms<span class="token punctuation">]</span> <span class="token assign-left variable">result</span><span class="token operator">=</span>@ArrayList<span class="token punctuation">[</span>
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@Object<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">[</span>
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@Integer<span class="token punctuation">[</span>-179173<span class="token punctuation">]</span>,
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<span class="token punctuation">]</span>,
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@MathGame<span class="token punctuation">[</span>
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<span class="token assign-left variable">random</span><span class="token operator">=</span>@Random<span class="token punctuation">[</span>java.util.Random@31cefde0<span class="token punctuation">]</span>,
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<span class="token assign-left variable">illegalArgumentCount</span><span class="token operator">=</span>@Integer<span class="token punctuation">[</span><span class="token number">44</span><span class="token punctuation">]</span>,
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<span class="token punctuation">]</span>,
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null,
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<span class="token punctuation">]</span>
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<span class="token assign-left variable">method</span><span class="token operator">=</span>demo.MathGame.primeFactors <span class="token assign-left variable">location</span><span class="token operator">=</span>AtExit
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<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2021</span>-08-31 <span class="token number">15</span>:22:58<span class="token punctuation">;</span> <span class="token punctuation">[</span>cost<span class="token operator">=</span><span class="token number">1</span>.020982ms<span class="token punctuation">]</span> <span class="token assign-left variable">result</span><span class="token operator">=</span>@ArrayList<span class="token punctuation">[</span>
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@Object<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">[</span>
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@Integer<span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span>,
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<span class="token punctuation">]</span>,
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@MathGame<span class="token punctuation">[</span>
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<span class="token assign-left variable">random</span><span class="token operator">=</span>@Random<span class="token punctuation">[</span>java.util.Random@31cefde0<span class="token punctuation">]</span>,
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<span class="token assign-left variable">illegalArgumentCount</span><span class="token operator">=</span>@Integer<span class="token punctuation">[</span><span class="token number">44</span><span class="token punctuation">]</span>,
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<span class="token punctuation">]</span>,
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@ArrayList<span class="token punctuation">[</span>
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@Integer<span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span>,
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@Integer<span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span>,
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@Integer<span class="token punctuation">[</span><span class="token number">26947</span><span class="token punctuation">]</span>,
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<span class="token punctuation">]</span>,
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<span class="token punctuation">]</span>
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</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></div><ul><li>In the above result, the method is executed twice, the first result is <code>location=AtExceptionExit</code>, indicating that the method throws an exception, so <code>returnObj</code> is null</li><li>In the second result is <code>location=AtExit</code>, indicating that the method returns normally, so you can see that the result of <code>returnObj</code> is an ArrayList</li></ul><h4 id="check-in-parameters" tabindex="-1"><a class="header-anchor" href="#check-in-parameters" aria-hidden="true">#</a> Check <code>in parameters</code></h4><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ <span class="token function">watch</span> demo.MathGame primeFactors <span class="token string">"{params,returnObj}"</span> -x <span class="token number">2</span> -b
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Press Ctrl+C to abort.
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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">50</span> ms.
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<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2018</span>-12-03 <span class="token number">19</span>:23:23<span class="token punctuation">;</span> <span class="token punctuation">[</span>cost<span class="token operator">=</span><span class="token number">0</span>.0353ms<span class="token punctuation">]</span> <span class="token assign-left variable">result</span><span class="token operator">=</span>@ArrayList<span class="token punctuation">[</span>
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@Object<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">[</span>
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@Integer<span class="token punctuation">[</span>-1077465243<span class="token punctuation">]</span>,
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<span class="token punctuation">]</span>,
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null,
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<span class="token punctuation">]</span>
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</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></div><p>Compared to the previous <em>check</em>:</p><ul><li><code>return value</code> is <code>null</code> since it's <code>-b</code>.</li></ul><h4 id="check-before-and-after-at-the-same-time" tabindex="-1"><a class="header-anchor" href="#check-before-and-after-at-the-same-time" aria-hidden="true">#</a> Check <em>before</em> and <em>after</em> at the same time</h4><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ <span class="token function">watch</span> demo.MathGame primeFactors <span class="token string">"{params,target,returnObj}"</span> -x <span class="token number">2</span> -b -s -n <span class="token number">2</span>
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Press Ctrl+C to abort.
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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">46</span> ms.
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<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2018</span>-12-03 <span class="token number">19</span>:29:54<span class="token punctuation">;</span> <span class="token punctuation">[</span>cost<span class="token operator">=</span><span class="token number">0</span>.01696ms<span class="token punctuation">]</span> <span class="token assign-left variable">result</span><span class="token operator">=</span>@ArrayList<span class="token punctuation">[</span>
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@Object<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">[</span>
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@Integer<span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span>,
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<span class="token punctuation">]</span>,
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@MathGame<span class="token punctuation">[</span>
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<span class="token assign-left variable">random</span><span class="token operator">=</span>@Random<span class="token punctuation">[</span>java.util.Random@522b408a<span class="token punctuation">]</span>,
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<span class="token assign-left variable">illegalArgumentCount</span><span class="token operator">=</span>@Integer<span class="token punctuation">[</span><span class="token number">13038</span><span class="token punctuation">]</span>,
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<span class="token punctuation">]</span>,
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null,
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<span class="token punctuation">]</span>
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<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2018</span>-12-03 <span class="token number">19</span>:29:54<span class="token punctuation">;</span> <span class="token punctuation">[</span>cost<span class="token operator">=</span><span class="token number">4</span>.277392ms<span class="token punctuation">]</span> <span class="token assign-left variable">result</span><span class="token operator">=</span>@ArrayList<span class="token punctuation">[</span>
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@Object<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">[</span>
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@Integer<span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span>,
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<span class="token punctuation">]</span>,
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@MathGame<span class="token punctuation">[</span>
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<span class="token assign-left variable">random</span><span class="token operator">=</span>@Random<span class="token punctuation">[</span>java.util.Random@522b408a<span class="token punctuation">]</span>,
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<span class="token assign-left variable">illegalArgumentCount</span><span class="token operator">=</span>@Integer<span class="token punctuation">[</span><span class="token number">13038</span><span class="token punctuation">]</span>,
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<span class="token punctuation">]</span>,
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@ArrayList<span class="token punctuation">[</span>
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@Integer<span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span>,
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@Integer<span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span>,
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@Integer<span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span>,
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@Integer<span class="token punctuation">[</span><span class="token number">5</span><span class="token punctuation">]</span>,
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@Integer<span class="token punctuation">[</span><span class="token number">5</span><span class="token punctuation">]</span>,
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@Integer<span class="token punctuation">[</span><span class="token number">73</span><span class="token punctuation">]</span>,
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@Integer<span class="token punctuation">[</span><span class="token number">241</span><span class="token punctuation">]</span>,
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@Integer<span class="token punctuation">[</span><span class="token number">439</span><span class="token punctuation">]</span>,
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<span class="token punctuation">]</span>,
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<span class="token punctuation">]</span>
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</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></div><p>F.Y.I</p><ul><li><code>-n 2</code>: threshold of execution times is 2.</li><li>the first block of output is the <em>before watching</em> point;</li><li>*the order of the output determined by the *watching* order itself (nothing to do with the order of the options <code>-b -s</code>).</li></ul><h4 id="use-x-to-check-more-details" tabindex="-1"><a class="header-anchor" href="#use-x-to-check-more-details" aria-hidden="true">#</a> Use <code>-x</code> to check more details</h4><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ <span class="token function">watch</span> demo.MathGame primeFactors <span class="token string">"{params,target}"</span> -x <span class="token number">3</span>
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Press Ctrl+C to abort.
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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">58</span> ms.
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<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2018</span>-12-03 <span class="token number">19</span>:34:19<span class="token punctuation">;</span> <span class="token punctuation">[</span>cost<span class="token operator">=</span><span class="token number">0</span>.587833ms<span class="token punctuation">]</span> <span class="token assign-left variable">result</span><span class="token operator">=</span>@ArrayList<span class="token punctuation">[</span>
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@Object<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">[</span>
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@Integer<span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span>,
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<span class="token punctuation">]</span>,
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@MathGame<span class="token punctuation">[</span>
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<span class="token assign-left variable">random</span><span class="token operator">=</span>@Random<span class="token punctuation">[</span>
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<span class="token assign-left variable">serialVersionUID</span><span class="token operator">=</span>@Long<span class="token punctuation">[</span><span class="token number">3905348978240129619</span><span class="token punctuation">]</span>,
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<span class="token assign-left variable">seed</span><span class="token operator">=</span>@AtomicLong<span class="token punctuation">[</span><span class="token number">3133719055989</span><span class="token punctuation">]</span>,
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<span class="token assign-left variable">multiplier</span><span class="token operator">=</span>@Long<span class="token punctuation">[</span><span class="token number">25214903917</span><span class="token punctuation">]</span>,
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<span class="token assign-left variable">addend</span><span class="token operator">=</span>@Long<span class="token punctuation">[</span><span class="token number">11</span><span class="token punctuation">]</span>,
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<span class="token assign-left variable">mask</span><span class="token operator">=</span>@Long<span class="token punctuation">[</span><span class="token number">281474976710655</span><span class="token punctuation">]</span>,
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<span class="token assign-left variable">DOUBLE_UNIT</span><span class="token operator">=</span>@Double<span class="token punctuation">[</span><span class="token number">1</span>.1102230246251565E-16<span class="token punctuation">]</span>,
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<span class="token assign-left variable">BadBound</span><span class="token operator">=</span>@String<span class="token punctuation">[</span>bound must be positive<span class="token punctuation">]</span>,
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<span class="token assign-left variable">BadRange</span><span class="token operator">=</span>@String<span class="token punctuation">[</span>bound must be greater than origin<span class="token punctuation">]</span>,
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<span class="token assign-left variable">BadSize</span><span class="token operator">=</span>@String<span class="token punctuation">[</span>size must be non-negative<span class="token punctuation">]</span>,
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<span class="token assign-left variable">seedUniquifier</span><span class="token operator">=</span>@AtomicLong<span class="token punctuation">[</span>-3282039941672302964<span class="token punctuation">]</span>,
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<span class="token assign-left variable">nextNextGaussian</span><span class="token operator">=</span>@Double<span class="token punctuation">[</span><span class="token number">0.0</span><span class="token punctuation">]</span>,
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<span class="token assign-left variable">haveNextNextGaussian</span><span class="token operator">=</span>@Boolean<span class="token punctuation">[</span>false<span class="token punctuation">]</span>,
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<span class="token assign-left variable">serialPersistentFields</span><span class="token operator">=</span>@ObjectStreamField<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">[</span>isEmpty<span class="token operator">=</span>false<span class="token punctuation">;</span><span class="token assign-left variable">size</span><span class="token operator">=</span><span class="token number">3</span><span class="token punctuation">]</span>,
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<span class="token assign-left variable">unsafe</span><span class="token operator">=</span>@Unsafe<span class="token punctuation">[</span>sun.misc.Unsafe@2eaa1027<span class="token punctuation">]</span>,
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<span class="token assign-left variable">seedOffset</span><span class="token operator">=</span>@Long<span class="token punctuation">[</span><span class="token number">24</span><span class="token punctuation">]</span>,
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<span class="token punctuation">]</span>,
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<span class="token assign-left variable">illegalArgumentCount</span><span class="token operator">=</span>@Integer<span class="token punctuation">[</span><span class="token number">13159</span><span class="token punctuation">]</span>,
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<span class="token punctuation">]</span>,
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<span class="token punctuation">]</span>
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</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></div><ul><li><code>-x</code>: Expand level of object (1 by default)</li><li>The max value of <code>-x</code> is 4, to prevent the expansion result taking up too much memory. Users can specify the field in the <code>ognl</code> expression.</li></ul><h4 id="use-condition-expressions-to-locate-specific-call" tabindex="-1"><a class="header-anchor" href="#use-condition-expressions-to-locate-specific-call" aria-hidden="true">#</a> Use condition expressions to locate specific call</h4><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ <span class="token function">watch</span> demo.MathGame primeFactors <span class="token string">"{params[0],target}"</span> <span class="token string">"params[0]<0"</span>
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Press Ctrl+C to abort.
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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">68</span> ms.
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<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2018</span>-12-03 <span class="token number">19</span>:36:04<span class="token punctuation">;</span> <span class="token punctuation">[</span>cost<span class="token operator">=</span><span class="token number">0</span>.530255ms<span class="token punctuation">]</span> <span class="token assign-left variable">result</span><span class="token operator">=</span>@ArrayList<span class="token punctuation">[</span>
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@Integer<span class="token punctuation">[</span>-18178089<span class="token punctuation">]</span>,
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@MathGame<span class="token punctuation">[</span>demo.MathGame@41cf53f9<span class="token punctuation">]</span>,
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<span class="token punctuation">]</span>
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</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><h4 id="check-exceptions" tabindex="-1"><a class="header-anchor" href="#check-exceptions" aria-hidden="true">#</a> Check <code>exceptions</code></h4><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ <span class="token function">watch</span> demo.MathGame primeFactors <span class="token string">"{params[0],throwExp}"</span> -e -x <span class="token number">2</span>
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Press Ctrl+C to abort.
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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">62</span> ms.
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<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2018</span>-12-03 <span class="token number">19</span>:38:00<span class="token punctuation">;</span> <span class="token punctuation">[</span>cost<span class="token operator">=</span><span class="token number">1</span>.414993ms<span class="token punctuation">]</span> <span class="token assign-left variable">result</span><span class="token operator">=</span>@ArrayList<span class="token punctuation">[</span>
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@Integer<span class="token punctuation">[</span>-1120397038<span class="token punctuation">]</span>,
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java.lang.IllegalArgumentException: number is: -1120397038, need <span class="token operator">>=</span> <span class="token number">2</span>
|
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at demo.MathGame.primeFactors<span class="token punctuation">(</span>MathGame.java:46<span class="token punctuation">)</span>
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at demo.MathGame.run<span class="token punctuation">(</span>MathGame.java:24<span class="token punctuation">)</span>
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at demo.MathGame.main<span class="token punctuation">(</span>MathGame.java:16<span class="token punctuation">)</span>
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,
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<span class="token punctuation">]</span>
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</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></div><ul><li><code>-e</code>: Trigger when an exception is thrown</li><li><code>throwExp</code>: the exception object</li></ul><h4 id="filter-by-time-cost" tabindex="-1"><a class="header-anchor" href="#filter-by-time-cost" aria-hidden="true">#</a> Filter by time cost</h4><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ <span class="token function">watch</span> demo.MathGame primeFactors <span class="token string">'{params, returnObj}'</span> <span class="token string">'#cost>200'</span> -x <span class="token number">2</span>
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Press Ctrl+C to abort.
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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">66</span> ms.
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<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2018</span>-12-03 <span class="token number">19</span>:40:28<span class="token punctuation">;</span> <span class="token punctuation">[</span>cost<span class="token operator">=</span><span class="token number">2112</span>.168897ms<span class="token punctuation">]</span> <span class="token assign-left variable">result</span><span class="token operator">=</span>@ArrayList<span class="token punctuation">[</span>
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@Object<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">[</span>
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@Integer<span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span>,
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<span class="token punctuation">]</span>,
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@ArrayList<span class="token punctuation">[</span>
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@Integer<span class="token punctuation">[</span><span class="token number">5</span><span class="token punctuation">]</span>,
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@Integer<span class="token punctuation">[</span><span class="token number">428379493</span><span class="token punctuation">]</span>,
|
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<span class="token punctuation">]</span>,
|
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<span class="token punctuation">]</span>
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</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><ul><li><code>#cost>200</code> (<code>ms</code>) filter out all invokings that take less than <code>200ms</code>.</li></ul><h4 id="check-the-field-of-the-target-object" tabindex="-1"><a class="header-anchor" href="#check-the-field-of-the-target-object" aria-hidden="true">#</a> Check the field of the target object</h4><ul><li><code>target</code> is the <code>this</code> object in java.</li></ul><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ <span class="token function">watch</span> demo.MathGame primeFactors <span class="token string">'target'</span>
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Press Ctrl+C to abort.
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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">52</span> ms.
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<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2018</span>-12-03 <span class="token number">19</span>:41:52<span class="token punctuation">;</span> <span class="token punctuation">[</span>cost<span class="token operator">=</span><span class="token number">0</span>.477882ms<span class="token punctuation">]</span> <span class="token assign-left variable">result</span><span class="token operator">=</span>@MathGame<span class="token punctuation">[</span>
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<span class="token assign-left variable">random</span><span class="token operator">=</span>@Random<span class="token punctuation">[</span>java.util.Random@522b408a<span class="token punctuation">]</span>,
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<span class="token assign-left variable">illegalArgumentCount</span><span class="token operator">=</span>@Integer<span class="token punctuation">[</span><span class="token number">13355</span><span class="token punctuation">]</span>,
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<span class="token punctuation">]</span>
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</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><ul><li><code>target.field_name</code>: the field of the current object.</li></ul><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ <span class="token function">watch</span> demo.MathGame primeFactors <span class="token string">'target.illegalArgumentCount'</span>
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Press Ctrl+C to abort.
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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">67</span> ms.
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<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2018</span>-12-03 <span class="token number">20</span>:04:34<span class="token punctuation">;</span> <span class="token punctuation">[</span>cost<span class="token operator">=</span><span class="token number">131</span>.303498ms<span class="token punctuation">]</span> <span class="token assign-left variable">result</span><span class="token operator">=</span>@Integer<span class="token punctuation">[</span><span class="token number">8</span><span class="token punctuation">]</span>
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<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2018</span>-12-03 <span class="token number">20</span>:04:35<span class="token punctuation">;</span> <span class="token punctuation">[</span>cost<span class="token operator">=</span><span class="token number">0</span>.961441ms<span class="token punctuation">]</span> <span class="token assign-left variable">result</span><span class="token operator">=</span>@Integer<span class="token punctuation">[</span><span class="token number">8</span><span class="token punctuation">]</span>
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</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></div><h4 id="get-a-static-field-and-calling-a-static-method" tabindex="-1"><a class="header-anchor" href="#get-a-static-field-and-calling-a-static-method" aria-hidden="true">#</a> Get a static field and calling a static method</h4><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code><span class="token function">watch</span> demo.MathGame * <span class="token string">'{params,@demo.MathGame@random.nextInt(100)}'</span> -v -n <span class="token number">1</span> -x <span class="token number">2</span>
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<span class="token punctuation">[</span>arthas@6527<span class="token punctuation">]</span>$ <span class="token function">watch</span> demo.MathGame * <span class="token string">'{params,@demo.MathGame@random.nextInt(100)}'</span> -n <span class="token number">1</span> -x <span class="token number">2</span>
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Press Q or Ctrl+C to abort.
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Affect<span class="token punctuation">(</span>class count: <span class="token number">1</span> , method count: <span class="token number">5</span><span class="token punctuation">)</span> cost <span class="token keyword">in</span> <span class="token number">34</span> ms, listenerId: <span class="token number">3</span>
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<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2021</span>-01-05 <span class="token number">21</span>:35:20<span class="token punctuation">;</span> <span class="token punctuation">[</span>cost<span class="token operator">=</span><span class="token number">0</span>.173966ms<span class="token punctuation">]</span> <span class="token assign-left variable">result</span><span class="token operator">=</span>@ArrayList<span class="token punctuation">[</span>
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@Object<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">[</span>
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@Integer<span class="token punctuation">[</span>-138282<span class="token punctuation">]</span>,
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<span class="token punctuation">]</span>,
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@Integer<span class="token punctuation">[</span><span class="token number">89</span><span class="token punctuation">]</span>,
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<span class="token punctuation">]</span>
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</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></div><ul><li>Note that here you use <code>Thread.currentThread().getContextClassLoader()</code> to load, and it is better to use the exact <code>classloader</code> <a href="/en/doc/ognl.html" class="">ognl</a>.</li></ul><h4 id="exclude-the-specified-class" tabindex="-1"><a class="header-anchor" href="#exclude-the-specified-class" aria-hidden="true">#</a> Exclude the specified class</h4><div class="custom-container tip"><p class="custom-container-title">TIP</p><p>The watch/trace/monitor/stack/tt commands all support the <code>--exclude-class-pattern</code> parameter</p></div><p>Use the <code>--exclude-class-pattern</code> parameter to exclude the specified class, for example:</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code><span class="token function">watch</span> javax.servlet.Filter * --exclude-class-pattern com.demo.TestFilter
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="does-not-match-subclass" tabindex="-1"><a class="header-anchor" href="#does-not-match-subclass" aria-hidden="true">#</a> Does not match subclass</h4><p>By default, the watch/trace/monitor/stack/tt commands will match subclass. If you don't want to match, you can turn it off.</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>options disable-sub-class <span class="token boolean">true</span>
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="use-the-v-parameter-to-print-more-information" tabindex="-1"><a class="header-anchor" href="#use-the-v-parameter-to-print-more-information" aria-hidden="true">#</a> Use the -v parameter to print more information</h4><blockquote><p>The watch/trace/monitor/stack/tt commands all support the <code>-v</code> parameter.</p></blockquote><p>When the command is executed, there is no output result. There are two possibilities:</p><ol><li>The matched function is not executed</li><li>The result of the conditional expression is false</li></ol><p>But the user cannot tell which situation is.</p><p>Using the <code>-v</code> option, the specific value and execution result of <code>Condition express</code> will be printed for easy confirmation.</p><p>such as:</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>$ watch -v -x 2 demo.MathGame print 'params' 'params[0] > 100000'
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Press Q or Ctrl+C to abort.
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Affect(class count: 1 , method count: 1) cost in 29 ms, listenerId: 11
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Condition express: params[0] > 100000 , result: false
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Condition express: params[0] > 100000 , result: false
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Condition express: params[0] > 100000 , result: true
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ts=2020-12-02 22:38:56; [cost=0.060843ms] result=@Object[][
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@Integer[1],
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@ArrayList[
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@Integer[200033],
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],
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]
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Condition express: params[0] > 100000 , result: true
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ts=2020-12-02 22:38:57; [cost=0.052877ms] result=@Object[][
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@Integer[1],
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@ArrayList[
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@Integer[29],
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@Integer[4243],
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],
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]
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</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></div></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/en/doc/watch.md" rel="noopener noreferrer" target="_blank" aria-label="Edit this page on GitHub"><!--[--><!--]--><span>Edit this page on 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">open in new window</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">Contributors: </span><span class="meta-item-info"><!--[--><!--[--><span class="contributor" title="email: hengyunabc@gmail.com">hengyunabc</span><!--[-->, <!--]--><!--]--><!--[--><span class="contributor" title="email: LHearen@126.com">Hearen</span><!--[-->, <!--]--><!--]--><!--[--><span class="contributor" title="email: hollowman186@vip.qq.com">Hollow Man</span><!--[-->, <!--]--><!--]--><!--[--><span class="contributor" title="email: lhearen@gmail.com">LHearen</span><!--[-->, <!--]--><!--]--><!--[--><span class="contributor" title="email: 983433479@qq.com">汪吉</span><!----><!--]--><!--]--></span></div></footer><!----><!--[--><!--]--></main><!--]--></div><!----><!--]--></div>
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