diff --git a/core/src/main/java/com/taobao/arthas/core/command/monitor200/TimeTunnelCommand.java b/core/src/main/java/com/taobao/arthas/core/command/monitor200/TimeTunnelCommand.java index 31281edbc..4282fc76c 100644 --- a/core/src/main/java/com/taobao/arthas/core/command/monitor200/TimeTunnelCommand.java +++ b/core/src/main/java/com/taobao/arthas/core/command/monitor200/TimeTunnelCommand.java @@ -42,10 +42,10 @@ import static java.lang.String.format; " tt -t *StringUtils isEmpty\n" + " tt -t *StringUtils isEmpty params[0].length==1\n" + " tt -l\n" + - " tt --delete-all\n" + - " tt -i 1000 -w params[0]\n" + - " tt -i 1000 -d\n" + " tt -i 1000\n" + + " tt -i 1000 -w params[0]\n" + + " tt -i 1000 -p\n" + + " tt --delete-all\n" + Constants.WIKI + Constants.WIKI_HOME + "tt") public class TimeTunnelCommand extends EnhancerCommand { // 时间隧道(时间碎片的集合) diff --git a/site/src/site/sphinx/en/tt.md b/site/src/site/sphinx/en/tt.md index a005e8f49..28c3f98ab 100644 --- a/site/src/site/sphinx/en/tt.md +++ b/site/src/site/sphinx/en/tt.md @@ -11,35 +11,37 @@ With the help of `tt` (*TimeTunnel*), you can check the contexts of the methods ### Usage -Let's record the whole calling contexts: - - ```java - $ tt -t -n 3 *Test print - Press Ctrl+D or Ctrl+X to abort. - Affect(class-cnt:1 , method-cnt:1) cost in 115 ms. - +----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ - | INDEX | TIMESTAMP | COST(ms) | IS-RET | IS-EXP | OBJECT | CLASS | METHOD | - +----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ - | 1007 | 2015-07-26 12:23:21 | 138 | true | false | 0x42cc13a0 | GaOgnlUtilsTest | print | - +----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ - | 1008 | 2015-07-26 12:23:22 | 143 | true | false | 0x42cc13a0 | GaOgnlUtilsTest | print | - +----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ - | 1009 | 2015-07-26 12:23:23 | 130 | true | false | 0x42cc13a0 | GaOgnlUtilsTest | print | - +----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ - $ - ``` - -#### F.Y.I - - - `-t` - - record the calling context of the method `*Test.print` + +#### Start Demo + +Start `arthas-demo` in [Quick Start](quick-start.md). + + +#### Record method calls + + +```bash +$ tt -t demo.MathGame primeFactors +Press Ctrl+C to abort. +Affect(class-cnt:1 , method-cnt:1) cost in 66 ms. + INDEX TIMESTAMP COST(ms) IS-RET IS-EXP OBJECT CLASS METHOD +------------------------------------------------------------------------------------------------------------------------------------- + 1000 2018-12-04 11:15:38 1.096236 false true 0x4b67cf4d MathGame primeFactors + 1001 2018-12-04 11:15:39 0.191848 false true 0x4b67cf4d MathGame primeFactors + 1002 2018-12-04 11:15:40 0.069523 false true 0x4b67cf4d MathGame primeFactors + 1003 2018-12-04 11:15:41 0.186073 false true 0x4b67cf4d MathGame primeFactors + 1004 2018-12-04 11:15:42 17.76437 true false 0x4b67cf4d MathGame primeFactors +``` + +* `-t` + + record the calling context of the method `demo.MathGame primeFactors` - - `-n 3` +* `-n 3` limit the number of the records (avoid overflow for too many records; with `-n` option, Arthas can automatically stop recording once the records reach the specified limit) -#### Property +* Property |Name|Specification| |---|---| @@ -52,7 +54,7 @@ Let's record the whole calling contexts: |CLASS|class name of the object invoking the method| |METHOD|method being invoked| -#### Condition expression +* Condition expression Tips: 1. `tt -t *Test print params[0].length==1` with different amounts of parameters; @@ -64,131 +66,96 @@ Advanced: * [Special usage](https://github.com/alibaba/arthas/issues/71) * [OGNL official guide](https://commons.apache.org/proper/commons-ognl/language-guide.html) +#### List all records -### Searching for records - -#### All the recorded - -``` +```bash $ tt -l -+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -| INDEX | TIMESTAMP | COST(ms) | IS-RET | IS-EXP | OBJECT | CLASS | METHOD | -+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -| 1000 | 2015-07-26 01:16:27 | 130 | true | false | 0x42cc13a0 | GaOgnlUtilsTest | print | -+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -| 1001 | 2015-07-26 01:16:27 | 0 | false | true | 0x42cc13a0 | GaOgnlUtilsTest | printAddress | -+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -| 1002 | 2015-07-26 01:16:28 | 119 | true | false | 0x42cc13a0 | GaOgnlUtilsTest | print | -+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -| 1003 | 2015-07-26 01:16:28 | 0 | false | true | 0x42cc13a0 | GaOgnlUtilsTest | printAddress | -+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -| 1004 | 2015-07-26 12:21:56 | 130 | true | false | 0x42cc13a0 | GaOgnlUtilsTest | print | -+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -| 1005 | 2015-07-26 12:21:57 | 138 | true | false | 0x42cc13a0 | GaOgnlUtilsTest | print | -+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -| 1006 | 2015-07-26 12:21:58 | 130 | true | false | 0x42cc13a0 | GaOgnlUtilsTest | print | -+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -Affect(row-cnt:7) cost in 2 ms. -$ + INDEX TIMESTAMP COST(ms) IS-RET IS-EXP OBJECT CLASS METHOD +------------------------------------------------------------------------------------------------------------------------------------- + 1000 2018-12-04 11:15:38 1.096236 false true 0x4b67cf4d MathGame primeFactors + 1001 2018-12-04 11:15:39 0.191848 false true 0x4b67cf4d MathGame primeFactors + 1002 2018-12-04 11:15:40 0.069523 false true 0x4b67cf4d MathGame primeFactors + 1003 2018-12-04 11:15:41 0.186073 false true 0x4b67cf4d MathGame primeFactors + 1004 2018-12-04 11:15:42 17.76437 true false 0x4b67cf4d MathGame primeFactors + 9 + 1005 2018-12-04 11:15:43 0.4776 false true 0x4b67cf4d MathGame primeFactors +Affect(row-cnt:6) cost in 4 ms. ``` -#### A specified method -``` -$ tt -s method.name=="printAddress" -+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -| INDEX | TIMESTAMP | COST(ms) | IS-RET | IS-EXP | OBJECT | CLASS | METHOD | -+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -| 1001 | 2015-07-26 01:16:27 | 0 | false | true | 0x42cc13a0 | GaOgnlUtilsTest | printAddress | -+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -| 1003 | 2015-07-26 01:16:28 | 0 | false | true | 0x42cc13a0 | GaOgnlUtilsTest | printAddress | -+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -Affect(row-cnt:2) cost in 55 ms. -$ +#### Searching for records + +```bash +$ tt -s 'method.name=="primeFactors"' + INDEX TIMESTAMP COST(ms) IS-RET IS-EXP OBJECT CLASS METHOD +------------------------------------------------------------------------------------------------------------------------------------- + 1000 2018-12-04 11:15:38 1.096236 false true 0x4b67cf4d MathGame primeFactors + 1001 2018-12-04 11:15:39 0.191848 false true 0x4b67cf4d MathGame primeFactors + 1002 2018-12-04 11:15:40 0.069523 false true 0x4b67cf4d MathGame primeFactors + 1003 2018-12-04 11:15:41 0.186073 false true 0x4b67cf4d MathGame primeFactors + 1004 2018-12-04 11:15:42 17.76437 true false 0x4b67cf4d MathGame primeFactors + 9 + 1005 2018-12-04 11:15:43 0.4776 false true 0x4b67cf4d MathGame primeFactors +Affect(row-cnt:6) cost in 607 ms. ``` Advanced: * [Critical fields in expression](advice-class.md) -### Check context of the call +#### Check context of the call Using `tt -i ` to check a specific calling details. -``` -$ +```bash $ tt -i 1003 -+-----------------+------------------------------------------------------------------------------------------------------+ -| INDEX | 1003 | -+-----------------+------------------------------------------------------------------------------------------------------+ -| GMT-CREATE | 2015-07-26 01:16:28 | -+-----------------+------------------------------------------------------------------------------------------------------+ -| COST(ms) | 0 | -+-----------------+------------------------------------------------------------------------------------------------------+ -| OBJECT | 0x42cc13a0 | -+-----------------+------------------------------------------------------------------------------------------------------+ -| CLASS | GaOgnlUtilsTest | -+-----------------+------------------------------------------------------------------------------------------------------+ -| METHOD | printAddress | -+-----------------+------------------------------------------------------------------------------------------------------+ -| IS-RETURN | false | -+-----------------+------------------------------------------------------------------------------------------------------+ -| IS-EXCEPTION | true | -+-----------------+------------------------------------------------------------------------------------------------------+ -| PARAMETERS[0] | Address@53448f87 | -+-----------------+------------------------------------------------------------------------------------------------------+ -| THROW-EXCEPTION | java.lang.RuntimeException: test | -| | at GaOgnlUtilsTest.printAddress(Unknown Source) | -| | at GaOgnlUtilsTest.(Unknown Source) | -| | at GaOgnlUtilsTest.main(Unknown Source) | -+-----------------+------------------------------------------------------------------------------------------------------+ -Affect(row-cnt:1) cost in 1 ms. -$ + INDEX 1003 + GMT-CREATE 2018-12-04 11:15:41 + COST(ms) 0.186073 + OBJECT 0x4b67cf4d + CLASS demo.MathGame + METHOD primeFactors + IS-RETURN false + IS-EXCEPTION true + PARAMETERS[0] @Integer[-564322413] + THROW-EXCEPTION java.lang.IllegalArgumentException: number is: -564322413, need >= 2 + at demo.MathGame.primeFactors(MathGame.java:46) + at demo.MathGame.run(MathGame.java:24) + at demo.MathGame.main(MathGame.java:16) + +Affect(row-cnt:1) cost in 11 ms. ``` -### Re-produce - -Since Arthas stores the context of the call, you can even *replay* the method calling afterwards with extra option `-p` to re-produce the issue for advanced troubleshooting. - -``` -$ tt -i 1003 -p -+-----------------+---------------------------------------------------------------------------------------------------------+ -| RE-INDEX | 1003 | -+-----------------+---------------------------------------------------------------------------------------------------------+ -| GMT-REPLAY | 2015-07-26 17:29:51 | -+-----------------+---------------------------------------------------------------------------------------------------------+ -| OBJECT | 0x42cc13a0 | -+-----------------+---------------------------------------------------------------------------------------------------------+ -| CLASS | GaOgnlUtilsTest | -+-----------------+---------------------------------------------------------------------------------------------------------+ -| METHOD | printAddress | -+-----------------+---------------------------------------------------------------------------------------------------------+ -| PARAMETERS[0] | Address@53448f87 | -+-----------------+---------------------------------------------------------------------------------------------------------+ -| IS-RETURN | false | -+-----------------+---------------------------------------------------------------------------------------------------------+ -| IS-EXCEPTION | true | -+-----------------+---------------------------------------------------------------------------------------------------------+ -| THROW-EXCEPTION | java.lang.RuntimeException: test | -| | at GaOgnlUtilsTest.printAddress(GaOgnlUtilsTest.java:78) | -| | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | -| | at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) | -| | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) | -| | at java.lang.reflect.Method.invoke(Method.java:483) | -| | at com.github.ompc.Arthas.util.GaMethod.invoke(GaMethod.java:81) | -| | at com.github.ompc.Arthas.command.TimeTunnelCommand$6.action(TimeTunnelCommand.java:592) | -| | at com.github.ompc.Arthas.server.DefaultCommandHandler.execute(DefaultCommandHandler.java:175) | -| | at com.github.ompc.Arthas.server.DefaultCommandHandler.executeCommand(DefaultCommandHandler.java:83) | -| | at com.github.ompc.Arthas.server.GaServer$4.run(GaServer.java:329) | -| | at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) | -| | at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) | -| | at java.lang.Thread.run(Thread.java:745) | -+-----------------+---------------------------------------------------------------------------------------------------------+ -replay time fragment[1003] success. -Affect(row-cnt:1) cost in 3 ms. -$ +### Replay record + +Since Arthas stores the context of the call, you can even *replay* the method calling afterwards with extra option `-p` to replay the issue for advanced troubleshooting. + +```bash +$ tt -i 1004 -p + RE-INDEX 1004 + GMT-REPLAY 2018-12-04 11:26:00 + OBJECT 0x4b67cf4d + CLASS demo.MathGame + METHOD primeFactors + PARAMETERS[0] @Integer[946738738] + IS-RETURN true + IS-EXCEPTION false + RETURN-OBJ @ArrayList[ + @Integer[2], + @Integer[11], + @Integer[17], + @Integer[2531387], + ] +Time fragment[1004] successfully replayed. +Affect(row-cnt:1) cost in 14 ms. ``` F.Y.I -1. the calling stack is little different using Arthas now unlike the original; -2. **Loss** of the thread local variables will be a undeniable fact since there is no way for Arthas to record the thread local info (*If you find one, please share with us in [issues tracker](https://github.com/alibaba/arthas/issues)*). -3. **Potential** modifications of objects can happen since only a reference will be recorded while later operations might modify objects without Arthas's watch. + +1. **Loss** of the `ThreadLocal` + + Arthas save params into an array, then invoke the method with the params again. The method execute in another thead, so the `ThreadLocal` **lost**. + +1. params may be modified + + Arthas save params into an array, they are object references. The Objects may be modified by other code. + diff --git a/site/src/site/sphinx/quick-start.md b/site/src/site/sphinx/quick-start.md index 484f7db4a..fe4f6ca5c 100644 --- a/site/src/site/sphinx/quick-start.md +++ b/site/src/site/sphinx/quick-start.md @@ -4,8 +4,8 @@ ## 1. 启动Demo ```bash -wget https://alibaba.github.io/arthas/arthas-demo.jar -java -jar arthas-demo.jar +$ wget https://alibaba.github.io/arthas/arthas-demo.jar +$ java -jar arthas-demo.jar ``` `arthas-demo`是一个简单的程序，每隔一秒生成一个随机数，再执行质因式分解，并打印出分解结果。 diff --git a/site/src/site/sphinx/tt.md b/site/src/site/sphinx/tt.md index 1016fb63c..da00ecb9e 100644 --- a/site/src/site/sphinx/tt.md +++ b/site/src/site/sphinx/tt.md @@ -9,27 +9,29 @@ tt 于是乎，TimeTunnel 命令就诞生了。 -### 记录方法的调用 +### 使用参考 -- 基本用法 - 对于一个最基本的使用来说，就是记录下当前方法的每次调用环境现场。 - - ```java - $ tt -t -n 3 *Test print - Press Ctrl+D or Ctrl+X to abort. - Affect(class-cnt:1 , method-cnt:1) cost in 115 ms. - +----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ - | INDEX | TIMESTAMP | COST(ms) | IS-RET | IS-EXP | OBJECT | CLASS | METHOD | - +----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ - | 1007 | 2015-07-26 12:23:21 | 138 | true | false | 0x42cc13a0 | GaOgnlUtilsTest | print | - +----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ - | 1008 | 2015-07-26 12:23:22 | 143 | true | false | 0x42cc13a0 | GaOgnlUtilsTest | print | - +----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ - | 1009 | 2015-07-26 12:23:23 | 130 | true | false | 0x42cc13a0 | GaOgnlUtilsTest | print | - +----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ - $ - ``` +#### 启动 Demo + +启动[快速入门](quick-start.md)里的`arthas-demo`。 + +#### 记录调用 + +对于一个最基本的使用来说，就是记录下当前方法的每次调用环境现场。 + +```bash +$ tt -t demo.MathGame primeFactors +Press Ctrl+C to abort. +Affect(class-cnt:1 , method-cnt:1) cost in 66 ms. + INDEX TIMESTAMP COST(ms) IS-RET IS-EXP OBJECT CLASS METHOD +------------------------------------------------------------------------------------------------------------------------------------- + 1000 2018-12-04 11:15:38 1.096236 false true 0x4b67cf4d MathGame primeFactors + 1001 2018-12-04 11:15:39 0.191848 false true 0x4b67cf4d MathGame primeFactors + 1002 2018-12-04 11:15:40 0.069523 false true 0x4b67cf4d MathGame primeFactors + 1003 2018-12-04 11:15:41 0.186073 false true 0x4b67cf4d MathGame primeFactors + 1004 2018-12-04 11:15:42 17.76437 true false 0x4b67cf4d MathGame primeFactors +``` - 命令参数解析 @@ -59,8 +61,8 @@ tt - 条件表达式 不知道大家是否有在使用过程中遇到以下困惑 - * Arthas 似乎很难区分出重载的方法 - * 我只需要观察特定参数，但是 tt 却全部都给我记录了下来 + * Arthas 似乎很难区分出重载的方法 + * 我只需要观察特定参数，但是 tt 却全部都给我记录了下来 条件表达式也是用 `OGNL` 来编写，核心的判断对象依然是 `Advice` 对象。除了 `tt` 命令之外，`watch`、`trace`、`stack` 命令也都支持条件表达式。 @@ -80,130 +82,91 @@ tt 前边看到了很多条件表达式中，都适用了 `params[0]`，有关这个变量的介绍，请参考[表达式核心变量](advice-class.md) -### 检索调用记录 +#### 检索调用记录 当你用 `tt` 记录了一大片的时间片段之后，你希望能从中筛选出自己需要的时间片段，这个时候你就需要对现有记录进行检索。 假设我们有这些记录 -``` +```bash $ tt -l -+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -| INDEX | TIMESTAMP | COST(ms) | IS-RET | IS-EXP | OBJECT | CLASS | METHOD | -+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -| 1000 | 2015-07-26 01:16:27 | 130 | true | false | 0x42cc13a0 | GaOgnlUtilsTest | print | -+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -| 1001 | 2015-07-26 01:16:27 | 0 | false | true | 0x42cc13a0 | GaOgnlUtilsTest | printAddress | -+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -| 1002 | 2015-07-26 01:16:28 | 119 | true | false | 0x42cc13a0 | GaOgnlUtilsTest | print | -+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -| 1003 | 2015-07-26 01:16:28 | 0 | false | true | 0x42cc13a0 | GaOgnlUtilsTest | printAddress | -+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -| 1004 | 2015-07-26 12:21:56 | 130 | true | false | 0x42cc13a0 | GaOgnlUtilsTest | print | -+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -| 1005 | 2015-07-26 12:21:57 | 138 | true | false | 0x42cc13a0 | GaOgnlUtilsTest | print | -+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -| 1006 | 2015-07-26 12:21:58 | 130 | true | false | 0x42cc13a0 | GaOgnlUtilsTest | print | -+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -Affect(row-cnt:7) cost in 2 ms. -$ + INDEX TIMESTAMP COST(ms) IS-RET IS-EXP OBJECT CLASS METHOD +------------------------------------------------------------------------------------------------------------------------------------- + 1000 2018-12-04 11:15:38 1.096236 false true 0x4b67cf4d MathGame primeFactors + 1001 2018-12-04 11:15:39 0.191848 false true 0x4b67cf4d MathGame primeFactors + 1002 2018-12-04 11:15:40 0.069523 false true 0x4b67cf4d MathGame primeFactors + 1003 2018-12-04 11:15:41 0.186073 false true 0x4b67cf4d MathGame primeFactors + 1004 2018-12-04 11:15:42 17.76437 true false 0x4b67cf4d MathGame primeFactors + 9 + 1005 2018-12-04 11:15:43 0.4776 false true 0x4b67cf4d MathGame primeFactors +Affect(row-cnt:6) cost in 4 ms. ``` -我需要筛选出 `printAddress` 方法的调用信息 - -``` -$ tt -s method.name=="printAddress" -+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -| INDEX | TIMESTAMP | COST(ms) | IS-RET | IS-EXP | OBJECT | CLASS | METHOD | -+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -| 1001 | 2015-07-26 01:16:27 | 0 | false | true | 0x42cc13a0 | GaOgnlUtilsTest | printAddress | -+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -| 1003 | 2015-07-26 01:16:28 | 0 | false | true | 0x42cc13a0 | GaOgnlUtilsTest | printAddress | -+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -Affect(row-cnt:2) cost in 55 ms. -$ +我需要筛选出 `primeFactors` 方法的调用信息 + +```bash +$ tt -s 'method.name=="primeFactors"' + INDEX TIMESTAMP COST(ms) IS-RET IS-EXP OBJECT CLASS METHOD +------------------------------------------------------------------------------------------------------------------------------------- + 1000 2018-12-04 11:15:38 1.096236 false true 0x4b67cf4d MathGame primeFactors + 1001 2018-12-04 11:15:39 0.191848 false true 0x4b67cf4d MathGame primeFactors + 1002 2018-12-04 11:15:40 0.069523 false true 0x4b67cf4d MathGame primeFactors + 1003 2018-12-04 11:15:41 0.186073 false true 0x4b67cf4d MathGame primeFactors + 1004 2018-12-04 11:15:42 17.76437 true false 0x4b67cf4d MathGame primeFactors + 9 + 1005 2018-12-04 11:15:43 0.4776 false true 0x4b67cf4d MathGame primeFactors +Affect(row-cnt:6) cost in 607 ms. ``` 你需要一个 `-s` 参数。同样的，搜索表达式的核心对象依旧是 `Advice` 对象。 -### 查看调用信息 +#### 查看调用信息 对于具体一个时间片的信息而言，你可以通过 `-i` 参数后边跟着对应的 `INDEX` 编号查看到他的详细信息。 -``` -$ +```bash $ tt -i 1003 -+-----------------+------------------------------------------------------------------------------------------------------+ -| INDEX | 1003 | -+-----------------+------------------------------------------------------------------------------------------------------+ -| GMT-CREATE | 2015-07-26 01:16:28 | -+-----------------+------------------------------------------------------------------------------------------------------+ -| COST(ms) | 0 | -+-----------------+------------------------------------------------------------------------------------------------------+ -| OBJECT | 0x42cc13a0 | -+-----------------+------------------------------------------------------------------------------------------------------+ -| CLASS | GaOgnlUtilsTest | -+-----------------+------------------------------------------------------------------------------------------------------+ -| METHOD | printAddress | -+-----------------+------------------------------------------------------------------------------------------------------+ -| IS-RETURN | false | -+-----------------+------------------------------------------------------------------------------------------------------+ -| IS-EXCEPTION | true | -+-----------------+------------------------------------------------------------------------------------------------------+ -| PARAMETERS[0] | Address@53448f87 | -+-----------------+------------------------------------------------------------------------------------------------------+ -| THROW-EXCEPTION | java.lang.RuntimeException: test | -| | at GaOgnlUtilsTest.printAddress(Unknown Source) | -| | at GaOgnlUtilsTest.(Unknown Source) | -| | at GaOgnlUtilsTest.main(Unknown Source) | -+-----------------+------------------------------------------------------------------------------------------------------+ -Affect(row-cnt:1) cost in 1 ms. -$ + INDEX 1003 + GMT-CREATE 2018-12-04 11:15:41 + COST(ms) 0.186073 + OBJECT 0x4b67cf4d + CLASS demo.MathGame + METHOD primeFactors + IS-RETURN false + IS-EXCEPTION true + PARAMETERS[0] @Integer[-564322413] + THROW-EXCEPTION java.lang.IllegalArgumentException: number is: -564322413, need >= 2 + at demo.MathGame.primeFactors(MathGame.java:46) + at demo.MathGame.run(MathGame.java:24) + at demo.MathGame.main(MathGame.java:16) + +Affect(row-cnt:1) cost in 11 ms. ``` -### 重做一次调用 +#### 重做一次调用 当你稍稍做了一些调整之后，你可能需要前端系统重新触发一次你的调用，此时得求爷爷告奶奶的需要前端配合联调的同学再次发起一次调用。而有些场景下，这个调用不是这么好触发的。 `tt` 命令由于保存了当时调用的所有现场信息，所以我们可以自己主动对一个 `INDEX` 编号的时间片自主发起一次调用，从而解放你的沟通成本。此时你需要 `-p` 参数。 -``` -$ tt -i 1003 -p -+-----------------+---------------------------------------------------------------------------------------------------------+ -| RE-INDEX | 1003 | -+-----------------+---------------------------------------------------------------------------------------------------------+ -| GMT-REPLAY | 2015-07-26 17:29:51 | -+-----------------+---------------------------------------------------------------------------------------------------------+ -| OBJECT | 0x42cc13a0 | -+-----------------+---------------------------------------------------------------------------------------------------------+ -| CLASS | GaOgnlUtilsTest | -+-----------------+---------------------------------------------------------------------------------------------------------+ -| METHOD | printAddress | -+-----------------+---------------------------------------------------------------------------------------------------------+ -| PARAMETERS[0] | Address@53448f87 | -+-----------------+---------------------------------------------------------------------------------------------------------+ -| IS-RETURN | false | -+-----------------+---------------------------------------------------------------------------------------------------------+ -| IS-EXCEPTION | true | -+-----------------+---------------------------------------------------------------------------------------------------------+ -| THROW-EXCEPTION | java.lang.RuntimeException: test | -| | at GaOgnlUtilsTest.printAddress(GaOgnlUtilsTest.java:78) | -| | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | -| | at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) | -| | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) | -| | at java.lang.reflect.Method.invoke(Method.java:483) | -| | at com.github.ompc.Arthas.util.GaMethod.invoke(GaMethod.java:81) | -| | at com.github.ompc.Arthas.command.TimeTunnelCommand$6.action(TimeTunnelCommand.java:592) | -| | at com.github.ompc.Arthas.server.DefaultCommandHandler.execute(DefaultCommandHandler.java:175) | -| | at com.github.ompc.Arthas.server.DefaultCommandHandler.executeCommand(DefaultCommandHandler.java:83) | -| | at com.github.ompc.Arthas.server.GaServer$4.run(GaServer.java:329) | -| | at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) | -| | at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) | -| | at java.lang.Thread.run(Thread.java:745) | -+-----------------+---------------------------------------------------------------------------------------------------------+ -replay time fragment[1003] success. -Affect(row-cnt:1) cost in 3 ms. -$ +```bash +$ tt -i 1004 -p + RE-INDEX 1004 + GMT-REPLAY 2018-12-04 11:26:00 + OBJECT 0x4b67cf4d + CLASS demo.MathGame + METHOD primeFactors + PARAMETERS[0] @Integer[946738738] + IS-RETURN true + IS-EXCEPTION false + RETURN-OBJ @ArrayList[ + @Integer[2], + @Integer[11], + @Integer[17], + @Integer[2531387], + ] +Time fragment[1004] successfully replayed. +Affect(row-cnt:1) cost in 14 ms. ``` 你会发现结果虽然一样，但调用的路径发生了变化，有原来的程序发起变成了 Arthas 自己的内部线程发起的调用了。