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@ -37,264 +37,196 @@ Advanced:
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### Usage
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### Usage
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A demo:
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Start `arthas-demo` in [Quick Start](quick-start.md).
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```java
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public void execute() {
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List<String> list = new ArrayList<String>();
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list.add("a");
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list.add("b");
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List<String> list2 = new ArrayList<String>();
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list2.add("c");
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list2.add("d");
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int len = add(list, list2);
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}
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private static int add(List<String> list, List<String> list2) {
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list.addAll(list2);
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return list.size();
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}
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```
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#### Check the `out parameters` and `return value`
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#### Check the `out parameters` and `return value`
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```shell
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```bash
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$ watch com.alibaba.sample.petstore.web.store.module.screen.ItemList add "{params,returnObj}" -x 2
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$ watch demo.MathGame primeFactors "{params,returnObj}" -x 2
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Press Ctrl+C to abort.
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Press Ctrl+C to abort.
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Affect(class-cnt:1 , method-cnt:1) cost in 44 ms.
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Affect(class-cnt:1 , method-cnt:1) cost in 44 ms.
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@ArrayList[
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ts=2018-12-03 19:16:51; [cost=1.280502ms] result=@ArrayList[
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@Object[][
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@Object[][
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@ArrayList[isEmpty=false;size=4],
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@Integer[535629513],
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@ArrayList[isEmpty=false;size=2],
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],
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@ArrayList[
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@Integer[3],
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@Integer[19],
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@Integer[191],
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@Integer[49199],
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],
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],
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@Integer[4],
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]
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]
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```
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```
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#### Check `in parameters`
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#### Check `in parameters`
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```shell
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```bash
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$ watch com.alibaba.sample.petstore.web.store.module.screen.ItemList add "{params,returnObj}" -x 2 -b
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$ watch demo.MathGame primeFactors "{params,returnObj}" -x 2 -b
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Press Ctrl+C to abort.
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Press Ctrl+C to abort.
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Affect(class-cnt:1 , method-cnt:1) cost in 48 ms.
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Affect(class-cnt:1 , method-cnt:1) cost in 50 ms.
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@ArrayList[
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ts=2018-12-03 19:23:23; [cost=0.0353ms] result=@ArrayList[
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@Object[][
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@Object[][
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@ArrayList[isEmpty=false;size=2],
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@Integer[-1077465243],
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@ArrayList[isEmpty=false;size=2],
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],
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],
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null,
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null,
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]
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]
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```
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```
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Compared to the previous *check*, there are two differences:
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Compared to the previous *check*:
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1. size of `params[0]` is `2` instead of `4`;
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2. `return value` is `null` since it's `-b`.
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* `return value` is `null` since it's `-b`.
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#### Check *before* and *after* at the same time
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#### Check *before* and *after* at the same time
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```shell
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$ watch com.alibaba.sample.petstore.web.store.module.screen.ItemList add "{params,returnObj}" -x 2 -b -s
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```bash
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$ watch demo.MathGame primeFactors "{params,target,returnObj}" -x 2 -b -s -n 2
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Press Ctrl+C to abort.
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Press Ctrl+C to abort.
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Affect(class-cnt:1 , method-cnt:1) cost in 59 ms.
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Affect(class-cnt:1 , method-cnt:1) cost in 46 ms.
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@ArrayList[
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ts=2018-12-03 19:29:54; [cost=0.01696ms] result=@ArrayList[
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@Object[][
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@Object[][
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@ArrayList[isEmpty=false;size=2],
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@Integer[1544665400],
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@ArrayList[isEmpty=false;size=2],
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],
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@MathGame[
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random=@Random[java.util.Random@522b408a],
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illegalArgumentCount=@Integer[13038],
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],
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],
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null,
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null,
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]
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]
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@ArrayList[
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ts=2018-12-03 19:29:54; [cost=4.277392ms] result=@ArrayList[
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@Object[][
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@Object[][
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@ArrayList[isEmpty=false;size=4],
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@Integer[1544665400],
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@ArrayList[isEmpty=false;size=2],
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],
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@MathGame[
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random=@Random[java.util.Random@522b408a],
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illegalArgumentCount=@Integer[13038],
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],
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@ArrayList[
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@Integer[2],
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@Integer[2],
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@Integer[2],
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@Integer[5],
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@Integer[5],
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@Integer[73],
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@Integer[241],
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@Integer[439],
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],
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],
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@Integer[4],
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]
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]
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```
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```
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F.Y.I
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F.Y.I
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1. the first block of output is the *before watching* point;
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2. the order of the output determined by the *watching* order itself (nothing to do with the order of the options `-b -s`).
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* `-n 2`: threshold of execution times is 2.
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* the first block of output is the *before watching* point;
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* *the order of the output determined by the *watching* order itself (nothing to do with the order of the options `-b -s`).
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#### Use `-x` to check more details
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#### Use `-x` to check more details
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```shell
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```bash
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$ watch com.alibaba.sample.petstore.web.store.module.screen.ItemList add "{params,returnObj}" -x 3
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$ watch demo.MathGame primeFactors "{params,target}" -x 3
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Press Ctrl+C to abort.
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Press Ctrl+C to abort.
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Affect(class-cnt:1 , method-cnt:1) cost in 59 ms.
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Affect(class-cnt:1 , method-cnt:1) cost in 58 ms.
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@ArrayList[
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ts=2018-12-03 19:34:19; [cost=0.587833ms] result=@ArrayList[
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@Object[][
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@Object[][
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@ArrayList[
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@Integer[47816758],
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@String[a],
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],
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@MathGame[
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@String[b],
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random=@Random[
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serialVersionUID=@Long[3905348978240129619],
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@String[c],
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seed=@AtomicLong[3133719055989],
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multiplier=@Long[25214903917],
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@String[d],
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addend=@Long[11],
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],
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mask=@Long[281474976710655],
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@ArrayList[
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DOUBLE_UNIT=@Double[1.1102230246251565E-16],
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@String[c],
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BadBound=@String[bound must be positive],
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BadRange=@String[bound must be greater than origin],
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@String[d],
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BadSize=@String[size must be non-negative],
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seedUniquifier=@AtomicLong[-3282039941672302964],
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nextNextGaussian=@Double[0.0],
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haveNextNextGaussian=@Boolean[false],
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serialPersistentFields=@ObjectStreamField[][isEmpty=false;size=3],
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unsafe=@Unsafe[sun.misc.Unsafe@2eaa1027],
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seedOffset=@Long[24],
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],
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],
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illegalArgumentCount=@Integer[13159],
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],
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],
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@Integer[4],
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]
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]
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```
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```
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* `-x`: Expand level of object (1 by default)
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#### Use condition expressions to locate specific call
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#### Use condition expressions to locate specific call
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```shell
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```bash
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$ watch com.alibaba.sample.petstore.biz.impl.UserManagerImpl testAdd "{params, returnObj}" "params[0].equals('aaa')" -x 2
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$ watch demo.MathGame primeFactors "{params[0],target}" "params[0]<0"
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Press Ctrl+C to abort.
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Press Ctrl+C to abort.
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Affect(class-cnt:1 , method-cnt:1) cost in 29 ms.
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Affect(class-cnt:1 , method-cnt:1) cost in 68 ms.
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@ArrayList[
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ts=2018-12-03 19:36:04; [cost=0.530255ms] result=@ArrayList[
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@Object[][
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@Integer[-18178089],
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@String[aaa],
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@MathGame[demo.MathGame@41cf53f9],
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@String[bbb],
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],
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@Integer[6],
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]
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]
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```
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```
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#### Check `exceptions`
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#### Check `exceptions`
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```shell
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```bash
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$ watch com.alibaba.sample.petstore.biz.impl.UserManagerImpl testAdd "{params, throwExp}" -e -x 2
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$ watch demo.MathGame primeFactors "{params[0],throwExp}" -e -x 2
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Press Ctrl+C to abort.
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Press Ctrl+C to abort.
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Affect(class-cnt:1 , method-cnt:1) cost in 29 ms.
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Affect(class-cnt:1 , method-cnt:1) cost in 62 ms.
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@ArrayList[
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ts=2018-12-03 19:38:00; [cost=1.414993ms] result=@ArrayList[
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@Object[][
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@Integer[-1120397038],
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@String[aaa],
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java.lang.IllegalArgumentException: number is: -1120397038, need >= 2
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@String[bbb],
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at demo.MathGame.primeFactors(MathGame.java:46)
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],
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at demo.MathGame.run(MathGame.java:24)
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at demo.MathGame.main(MathGame.java:16)
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java.lang.NullPointerException
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,
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at com.alibaba.sample.petstore.biz.impl.UserManagerImpl.testAdd(UserManagerImpl.java:75)
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at com.alibaba.sample.petstore.biz.impl.UserManagerImpl.register(UserManagerImpl.java:60)
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at com.alibaba.sample.petstore.web.user.module.action.RegisterAction.doRegister(RegisterAction.java:45)
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at com.alibaba.sample.petstore.web.user.module.action.RegisterAction$$FastClassByCGLIB$$ad5428f1.invoke(<generated>)
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at net.sf.cglib.reflect.FastMethod.invoke(FastMethod.java:53)
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at com.alibaba.citrus.service.moduleloader.impl.adapter.MethodInvoker.invoke(MethodInvoker.java:70)
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at com.alibaba.citrus.service.moduleloader.impl.adapter.AbstractModuleEventAdapter.executeAndReturn(AbstractModuleEventAdapter.java:100)
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at com.alibaba.citrus.service.moduleloader.impl.adapter.AbstractModuleEventAdapter.execute(AbstractModuleEventAdapter.java:58)
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at com.alibaba.citrus.turbine.pipeline.valve.PerformActionValve.invoke(PerformActionValve.java:63)
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at com.alibaba.citrus.service.pipeline.impl.PipelineImpl$PipelineContextImpl.invokeNext(PipelineImpl.java:157)
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at com.alibaba.citrus.service.pipeline.impl.PipelineImpl$PipelineContextImpl.invoke(PipelineImpl.java:210)
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at com.alibaba.citrus.service.pipeline.impl.valve.ChooseValve.invoke(ChooseValve.java:98)
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at com.alibaba.citrus.service.pipeline.impl.PipelineImpl$PipelineContextImpl.invokeNext(PipelineImpl.java:157)
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at com.alibaba.citrus.service.pipeline.impl.PipelineImpl$PipelineContextImpl.invoke(PipelineImpl.java:210)
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at com.alibaba.citrus.service.pipeline.impl.valve.LoopValve.invokeBody(LoopValve.java:105)
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at com.alibaba.citrus.service.pipeline.impl.valve.LoopValve.invoke(LoopValve.java:83)
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at com.alibaba.citrus.service.pipeline.impl.PipelineImpl$PipelineContextImpl.invokeNext(PipelineImpl.java:157)
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at com.alibaba.citrus.turbine.pipeline.valve.PageAuthorizationValve.invoke(PageAuthorizationValve.java:105)
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at com.alibaba.citrus.service.pipeline.impl.PipelineImpl$PipelineContextImpl.invokeNext(PipelineImpl.java:157)
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at com.alibaba.citrus.turbine.pipeline.valve.CheckCsrfTokenValve.invoke(CheckCsrfTokenValve.java:123)
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at com.alibaba.citrus.service.pipeline.impl.PipelineImpl$PipelineContextImpl.invokeNext(PipelineImpl.java:157)
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at com.alibaba.citrus.turbine.pipeline.valve.AnalyzeURLValve.invoke(AnalyzeURLValve.java:126)
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at com.alibaba.citrus.service.pipeline.impl.PipelineImpl$PipelineContextImpl.invokeNext(PipelineImpl.java:157)
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at com.alibaba.citrus.turbine.pipeline.valve.SetLoggingContextValve.invoke(SetLoggingContextValve.java:66)
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at com.alibaba.citrus.service.pipeline.impl.PipelineImpl$PipelineContextImpl.invokeNext(PipelineImpl.java:157)
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at com.alibaba.citrus.turbine.pipeline.valve.PrepareForTurbineValve.invoke(PrepareForTurbineValve.java:52)
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at com.alibaba.citrus.service.pipeline.impl.PipelineImpl$PipelineContextImpl.invokeNext(PipelineImpl.java:157)
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at com.alibaba.citrus.service.pipeline.impl.PipelineImpl$PipelineContextImpl.invoke(PipelineImpl.java:210)
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at com.alibaba.citrus.webx.impl.WebxControllerImpl.service(WebxControllerImpl.java:43)
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at com.alibaba.citrus.webx.impl.WebxRootControllerImpl.handleRequest(WebxRootControllerImpl.java:53)
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at com.alibaba.citrus.webx.support.AbstractWebxRootController.service(AbstractWebxRootController.java:165)
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at com.alibaba.citrus.webx.servlet.WebxFrameworkFilter.doFilter(WebxFrameworkFilter.java:152)
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at com.alibaba.citrus.webx.servlet.FilterBean.doFilter(FilterBean.java:148)
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at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
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at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
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at com.alibaba.citrus.webx.servlet.SetLoggingContextFilter.doFilter(SetLoggingContextFilter.java:61)
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at com.alibaba.citrus.webx.servlet.FilterBean.doFilter(FilterBean.java:148)
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|
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
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at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
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at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
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at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
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|
at com.taobao.tomcat.valves.ContextLoadFilterValve.invoke(ContextLoadFilterValve.java:152)
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|
|
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
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|
|
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
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|
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
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|
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:429)
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|
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1085)
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|
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)
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|
|
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1760)
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|
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1719)
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|
|
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
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|
|
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
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|
|
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
|
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|
|
|
at java.lang.Thread.run(Thread.java:745),
|
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|
|
|
|
|
]
|
|
|
|
]
|
|
|
|
```
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
#### Filter based on time cost
|
|
|
|
* `-e`: Trigger when an exception is thrown
|
|
|
|
|
|
|
|
* `throwExp`: the exception object
|
|
|
|
|
|
|
|
|
|
|
|
```shell
|
|
|
|
#### Filter by time cost
|
|
|
|
$ watch com.alibaba.sample.petstore.web.store.module.screen.ItemList add "{params,returnObj}" #cost>200 -x 3
|
|
|
|
|
|
|
|
|
|
|
|
```bash
|
|
|
|
|
|
|
|
$ watch demo.MathGame primeFactors '{params, returnObj}' '#cost>200' -x 2
|
|
|
|
Press Ctrl+C to abort.
|
|
|
|
Press Ctrl+C to abort.
|
|
|
|
Affect(class-cnt:1 , method-cnt:1) cost in 59 ms.
|
|
|
|
Affect(class-cnt:1 , method-cnt:1) cost in 66 ms.
|
|
|
|
@ArrayList[
|
|
|
|
ts=2018-12-03 19:40:28; [cost=2112.168897ms] result=@ArrayList[
|
|
|
|
@Object[][
|
|
|
|
@Object[][
|
|
|
|
@ArrayList[
|
|
|
|
@Integer[2141897465],
|
|
|
|
@String[a],
|
|
|
|
],
|
|
|
|
|
|
|
|
@ArrayList[
|
|
|
|
@String[b],
|
|
|
|
@Integer[5],
|
|
|
|
|
|
|
|
@Integer[428379493],
|
|
|
|
@String[c],
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
@String[d],
|
|
|
|
|
|
|
|
],
|
|
|
|
|
|
|
|
@ArrayList[
|
|
|
|
|
|
|
|
@String[c],
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
@String[d],
|
|
|
|
|
|
|
|
],
|
|
|
|
|
|
|
|
],
|
|
|
|
],
|
|
|
|
|
|
|
|
|
|
|
|
@Integer[4],
|
|
|
|
|
|
|
|
]
|
|
|
|
]
|
|
|
|
```
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
F.Y.I
|
|
|
|
* `#cost>200` (`ms`) filter out all invokings that take less than `200ms`.
|
|
|
|
`#cost>200` (`ms`) filter out all invokings that take less than `200ms`.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#### Check the global properties of the target object
|
|
|
|
#### Check the field of the target object
|
|
|
|
|
|
|
|
|
|
|
|
`target` stands for the current object.
|
|
|
|
* `target` is the `this` object in java.
|
|
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
```bash
|
|
|
|
$ watch com.taobao.container.web.arthas.rest.MyAppsController myFavoriteApps 'target'
|
|
|
|
$ watch demo.MathGame primeFactors 'target'
|
|
|
|
Press Ctrl+C to abort.
|
|
|
|
Press Ctrl+C to abort.
|
|
|
|
Affect(class-cnt:1 , method-cnt:1) cost in 128 ms.
|
|
|
|
Affect(class-cnt:1 , method-cnt:1) cost in 52 ms.
|
|
|
|
ts=2017-10-31 18:45:55;result=@MyAppsController[
|
|
|
|
ts=2018-12-03 19:41:52; [cost=0.477882ms] result=@MathGame[
|
|
|
|
myFavAppsMapper=@$Proxy131[org.apache.ibatis.binding.MapperProxy@563e97f3],
|
|
|
|
random=@Random[java.util.Random@522b408a],
|
|
|
|
getAppNameAndIdByEmpId=@$Proxy135[HardCodedTarget(type=GetAppNameAndIdByEmpId, url=http://hello.com)],
|
|
|
|
illegalArgumentCount=@Integer[13355],
|
|
|
|
enableWebConsoleAppsMapper=@$Proxy132[org.apache.ibatis.binding.MapperProxy@7d51e4a8],
|
|
|
|
|
|
|
|
]
|
|
|
|
]
|
|
|
|
```
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
`target.field_name` stands for a global property of the current object.
|
|
|
|
* `target.field_name`: the field of the current object.
|
|
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
```
|
|
|
|
$ watch com.taobao.container.web.arthas.rest.MyAppsController myFavoriteApps 'target.myFavAppsMapper'
|
|
|
|
$ watch demo.MathGame primeFactors 'target.illegalArgumentCount'
|
|
|
|
Press Ctrl+C to abort.
|
|
|
|
Press Ctrl+C to abort.
|
|
|
|
Affect(class-cnt:1 , method-cnt:1) cost in 126 ms.
|
|
|
|
Affect(class-cnt:1 , method-cnt:1) cost in 67 ms.
|
|
|
|
ts=2017-10-31 18:46:17;result=@$Proxy131[
|
|
|
|
ts=2018-12-03 20:04:34; [cost=131.303498ms] result=@Integer[8]
|
|
|
|
m1=@Method[public boolean java.lang.Object.equals(java.lang.Object)],
|
|
|
|
ts=2018-12-03 20:04:35; [cost=0.961441ms] result=@Integer[8]
|
|
|
|
m2=@Method[public java.lang.String java.lang.Object.toString()],
|
|
|
|
|
|
|
|
m5=@Method[public abstract java.util.List com.taobao.container.dal.arthas.mapper.MyFavAppsMapper.listFavApps(java.util.Map)],
|
|
|
|
|
|
|
|
m3=@Method[public abstract int com.taobao.container.dal.arthas.mapper.MyFavAppsMapper.delete(java.lang.String,java.lang.String,java.lang.String)],
|
|
|
|
|
|
|
|
m4=@Method[public abstract long com.taobao.container.dal.arthas.mapper.MyFavAppsMapper.insert(com.taobao.container.dal.arthas.domain.MyFavAppsDO)],
|
|
|
|
|
|
|
|
m0=@Method[public native int java.lang.Object.hashCode()],
|
|
|
|
|
|
|
|
]
|
|
|
|
|
|
|
|
```
|
|
|
|
```
|
|
|
|
|
hengyunabc
6 years ago