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update tt doc

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hengyunabc 6 years ago
parent 307e6bad5a
commit a598382890
4 changed files with 192 additions and 262 deletions
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6
core/src/main/java/com/taobao/arthas/core/command/monitor200/TimeTunnelCommand.java
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@ -42,10 +42,10 @@ import static java.lang.String.format;
" tt -t *StringUtils isEmpty\n" + " tt -t *StringUtils isEmpty\n" +
" tt -t *StringUtils isEmpty params[0].length==1\n" + " tt -t *StringUtils isEmpty params[0].length==1\n" +
" tt -l\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\n" +
" tt -i 1000 -w params[0]\n" +
" tt -i 1000 -p\n" +
" tt --delete-all\n" +
Constants.WIKI + Constants.WIKI_HOME + "tt") Constants.WIKI + Constants.WIKI_HOME + "tt")
public class TimeTunnelCommand extends EnhancerCommand { public class TimeTunnelCommand extends EnhancerCommand {
// 时间隧道(时间碎片的集合) // 时间隧道(时间碎片的集合)

229
site/src/site/sphinx/en/tt.md
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@ -11,35 +11,37 @@ With the help of `tt` (*TimeTunnel*), you can check the contexts of the methods
### Usage ### Usage
Let's record the whole calling contexts:
```java #### Start Demo
$ 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 Start `arthas-demo` in [Quick Start](quick-start.md).
- `-t`
record the calling context of the method `*Test.print` #### Record method calls
- `-n 3`
```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`
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) 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| |Name|Specification|
|---|---| |---|---|
@ -52,7 +54,7 @@ Let's record the whole calling contexts:
|CLASS|class name of the object invoking the method| |CLASS|class name of the object invoking the method|
|METHOD|method being invoked| |METHOD|method being invoked|
#### Condition expression * Condition expression
Tips: Tips:
1. `tt -t *Test print params[0].length==1` with different amounts of parameters; 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) * [Special usage](https://github.com/alibaba/arthas/issues/71)
* [OGNL official guide](https://commons.apache.org/proper/commons-ognl/language-guide.html) * [OGNL official guide](https://commons.apache.org/proper/commons-ognl/language-guide.html)
#### List all records
### Searching for records ```bash
#### All the recorded
```
$ tt -l $ tt -l
+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ INDEX TIMESTAMP COST(ms) IS-RET IS-EXP OBJECT CLASS METHOD
| 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
| 1000 | 2015-07-26 01:16:27 | 130 | true | false | 0x42cc13a0 | GaOgnlUtilsTest | print | 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
| 1001 | 2015-07-26 01:16:27 | 0 | false | true | 0x42cc13a0 | GaOgnlUtilsTest | printAddress | 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
| 1002 | 2015-07-26 01:16:28 | 119 | true | false | 0x42cc13a0 | GaOgnlUtilsTest | print | 9
+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ 1005 2018-12-04 11:15:43 0.4776 false true 0x4b67cf4d MathGame primeFactors
| 1003 | 2015-07-26 01:16:28 | 0 | false | true | 0x42cc13a0 | GaOgnlUtilsTest | printAddress | Affect(row-cnt:6) cost in 4 ms.
+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+
| 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.
$
``` ```
#### A specified method
``` #### Searching for records
$ tt -s method.name=="printAddress"
+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ ```bash
| INDEX | TIMESTAMP | COST(ms) | IS-RET | IS-EXP | OBJECT | CLASS | METHOD | $ tt -s 'method.name=="primeFactors"'
+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ INDEX TIMESTAMP COST(ms) IS-RET IS-EXP OBJECT CLASS METHOD
| 1001 | 2015-07-26 01:16:27 | 0 | false | true | 0x42cc13a0 | GaOgnlUtilsTest | printAddress | -------------------------------------------------------------------------------------------------------------------------------------
+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ 1000 2018-12-04 11:15:38 1.096236 false true 0x4b67cf4d MathGame primeFactors
| 1003 | 2015-07-26 01:16:28 | 0 | false | true | 0x42cc13a0 | GaOgnlUtilsTest | printAddress | 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
Affect(row-cnt:2) cost in 55 ms. 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: Advanced:
* [Critical fields in expression](advice-class.md) * [Critical fields in expression](advice-class.md)
### Check context of the call #### Check context of the call
Using `tt -i <index>` to check a specific calling details. Using `tt -i <index>` to check a specific calling details.
``` ```bash
$
$ tt -i 1003 $ tt -i 1003
+-----------------+------------------------------------------------------------------------------------------------------+ INDEX 1003
| INDEX | 1003 | GMT-CREATE 2018-12-04 11:15:41
+-----------------+------------------------------------------------------------------------------------------------------+ COST(ms) 0.186073
| GMT-CREATE | 2015-07-26 01:16:28 | OBJECT 0x4b67cf4d
+-----------------+------------------------------------------------------------------------------------------------------+ CLASS demo.MathGame
| COST(ms) | 0 | METHOD primeFactors
+-----------------+------------------------------------------------------------------------------------------------------+ IS-RETURN false
| OBJECT | 0x42cc13a0 | IS-EXCEPTION true
+-----------------+------------------------------------------------------------------------------------------------------+ PARAMETERS[0] @Integer[-564322413]
| CLASS | GaOgnlUtilsTest | THROW-EXCEPTION java.lang.IllegalArgumentException: number is: -564322413, need >= 2
+-----------------+------------------------------------------------------------------------------------------------------+ at demo.MathGame.primeFactors(MathGame.java:46)
| METHOD | printAddress | at demo.MathGame.run(MathGame.java:24)
+-----------------+------------------------------------------------------------------------------------------------------+ at demo.MathGame.main(MathGame.java:16)
| IS-RETURN | false |
+-----------------+------------------------------------------------------------------------------------------------------+ Affect(row-cnt:1) cost in 11 ms.
| IS-EXCEPTION | true |
+-----------------+------------------------------------------------------------------------------------------------------+
| PARAMETERS[0] | Address@53448f87 |
+-----------------+------------------------------------------------------------------------------------------------------+
| THROW-EXCEPTION | java.lang.RuntimeException: test |
| | at GaOgnlUtilsTest.printAddress(Unknown Source) |
| | at GaOgnlUtilsTest.<init>(Unknown Source) |
| | at GaOgnlUtilsTest.main(Unknown Source) |
+-----------------+------------------------------------------------------------------------------------------------------+
Affect(row-cnt:1) cost in 1 ms.
$
``` ```
### Re-produce ### Replay record
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. 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 1003 -p $ tt -i 1004 -p
+-----------------+---------------------------------------------------------------------------------------------------------+ RE-INDEX 1004
| RE-INDEX | 1003 | GMT-REPLAY 2018-12-04 11:26:00
+-----------------+---------------------------------------------------------------------------------------------------------+ OBJECT 0x4b67cf4d
| GMT-REPLAY | 2015-07-26 17:29:51 | CLASS demo.MathGame
+-----------------+---------------------------------------------------------------------------------------------------------+ METHOD primeFactors
| OBJECT | 0x42cc13a0 | PARAMETERS[0] @Integer[946738738]
+-----------------+---------------------------------------------------------------------------------------------------------+ IS-RETURN true
| CLASS | GaOgnlUtilsTest | IS-EXCEPTION false
+-----------------+---------------------------------------------------------------------------------------------------------+ RETURN-OBJ @ArrayList[
| METHOD | printAddress | @Integer[2],
+-----------------+---------------------------------------------------------------------------------------------------------+ @Integer[11],
| PARAMETERS[0] | Address@53448f87 | @Integer[17],
+-----------------+---------------------------------------------------------------------------------------------------------+ @Integer[2531387],
| IS-RETURN | false | ]
+-----------------+---------------------------------------------------------------------------------------------------------+ Time fragment[1004] successfully replayed.
| IS-EXCEPTION | true | Affect(row-cnt:1) cost in 14 ms.
+-----------------+---------------------------------------------------------------------------------------------------------+
| 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.
$
``` ```
F.Y.I 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)*). 1. **Loss** of the `ThreadLocal`
3. **Potential** modifications of objects can happen since only a reference will be recorded while later operations might modify objects without Arthas's watch.
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.

4
site/src/site/sphinx/quick-start.md
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@ -4,8 +4,8 @@
## 1. 启动Demo ## 1. 启动Demo
```bash ```bash
wget https://alibaba.github.io/arthas/arthas-demo.jar $ wget https://alibaba.github.io/arthas/arthas-demo.jar
java -jar 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。 `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。

211
site/src/site/sphinx/tt.md
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@ -9,27 +9,29 @@ tt
于是乎，TimeTunnel 命令就诞生了。 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
#### 启动 Demo
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。
启动[快速入门](quick-start.md)里的`arthas-demo`。
```java
$ tt -t -n 3 *Test print #### 记录调用
Press Ctrl+D or Ctrl+X to abort.
Affect(class-cnt:1 , method-cnt:1) cost in 115 ms. 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。
+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+
| INDEX | TIMESTAMP | COST(ms) | IS-RET | IS-EXP | OBJECT | CLASS | METHOD | ```bash
+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ $ tt -t demo.MathGame primeFactors
| 1007 | 2015-07-26 12:23:21 | 138 | true | false | 0x42cc13a0 | GaOgnlUtilsTest | print | Press Ctrl+C to abort.
+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ Affect(class-cnt:1 , method-cnt:1) cost in 66 ms.
| 1008 | 2015-07-26 12:23:22 | 143 | true | false | 0x42cc13a0 | GaOgnlUtilsTest | print | INDEX TIMESTAMP COST(ms) IS-RET IS-EXP OBJECT CLASS METHOD
+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ -------------------------------------------------------------------------------------------------------------------------------------
| 1009 | 2015-07-26 12:23:23 | 130 | true | false | 0x42cc13a0 | GaOgnlUtilsTest | print | 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 - 命令参数解析
@ -59,8 +61,8 @@ tt
- 条件表达式 - 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 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 * 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 * 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。 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) 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。 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 假设我们有这些记录
``` ```bash
$ tt -l $ tt -l
+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ INDEX TIMESTAMP COST(ms) IS-RET IS-EXP OBJECT CLASS METHOD
| 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
| 1000 | 2015-07-26 01:16:27 | 130 | true | false | 0x42cc13a0 | GaOgnlUtilsTest | print | 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
| 1001 | 2015-07-26 01:16:27 | 0 | false | true | 0x42cc13a0 | GaOgnlUtilsTest | printAddress | 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
| 1002 | 2015-07-26 01:16:28 | 119 | true | false | 0x42cc13a0 | GaOgnlUtilsTest | print | 9
+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ 1005 2018-12-04 11:15:43 0.4776 false true 0x4b67cf4d MathGame primeFactors
| 1003 | 2015-07-26 01:16:28 | 0 | false | true | 0x42cc13a0 | GaOgnlUtilsTest | printAddress | Affect(row-cnt:6) cost in 4 ms.
+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+
| 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.
$
``` ```
我需要筛选出 `printAddress` 方法的调用信息 我需要筛选出 `primeFactors` 方法的调用信息
``` ```bash
$ tt -s method.name=="printAddress" $ tt -s 'method.name=="primeFactors"'
+----------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ INDEX TIMESTAMP COST(ms) IS-RET IS-EXP OBJECT CLASS METHOD
| 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 | 2015-07-26 01:16:27 | 0 | false | true | 0x42cc13a0 | GaOgnlUtilsTest | printAddress | 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 | 2015-07-26 01:16:28 | 0 | false | true | 0x42cc13a0 | GaOgnlUtilsTest | printAddress | 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
Affect(row-cnt:2) cost in 55 ms. 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。<span style="color:red;">同样的，搜索表达式的核心对象依旧是 `Advice` 对象。</span> 你需要一个 `-s` 参数。<span style="color:red;">同样的，搜索表达式的核心对象依旧是 `Advice` 对象。</span>
### 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。 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 $ tt -i 1003
+-----------------+------------------------------------------------------------------------------------------------------+ INDEX 1003
| INDEX | 1003 | GMT-CREATE 2018-12-04 11:15:41
+-----------------+------------------------------------------------------------------------------------------------------+ COST(ms) 0.186073
| GMT-CREATE | 2015-07-26 01:16:28 | OBJECT 0x4b67cf4d
+-----------------+------------------------------------------------------------------------------------------------------+ CLASS demo.MathGame
| COST(ms) | 0 | METHOD primeFactors
+-----------------+------------------------------------------------------------------------------------------------------+ IS-RETURN false
| OBJECT | 0x42cc13a0 | IS-EXCEPTION true
+-----------------+------------------------------------------------------------------------------------------------------+ PARAMETERS[0] @Integer[-564322413]
| CLASS | GaOgnlUtilsTest | THROW-EXCEPTION java.lang.IllegalArgumentException: number is: -564322413, need >= 2
+-----------------+------------------------------------------------------------------------------------------------------+ at demo.MathGame.primeFactors(MathGame.java:46)
| METHOD | printAddress | at demo.MathGame.run(MathGame.java:24)
+-----------------+------------------------------------------------------------------------------------------------------+ at demo.MathGame.main(MathGame.java:16)
| IS-RETURN | false |
+-----------------+------------------------------------------------------------------------------------------------------+ Affect(row-cnt:1) cost in 11 ms.
| IS-EXCEPTION | true |
+-----------------+------------------------------------------------------------------------------------------------------+
| PARAMETERS[0] | Address@53448f87 |
+-----------------+------------------------------------------------------------------------------------------------------+
| THROW-EXCEPTION | java.lang.RuntimeException: test |
| | at GaOgnlUtilsTest.printAddress(Unknown Source) |
| | at GaOgnlUtilsTest.<init>(Unknown Source) |
| | at GaOgnlUtilsTest.main(Unknown Source) |
+-----------------+------------------------------------------------------------------------------------------------------+
Affect(row-cnt:1) cost in 1 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。 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` 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。
``` ```bash
$ tt -i 1003 -p $ tt -i 1004 -p
+-----------------+---------------------------------------------------------------------------------------------------------+ RE-INDEX 1004
| RE-INDEX | 1003 | GMT-REPLAY 2018-12-04 11:26:00
+-----------------+---------------------------------------------------------------------------------------------------------+ OBJECT 0x4b67cf4d
| GMT-REPLAY | 2015-07-26 17:29:51 | CLASS demo.MathGame
+-----------------+---------------------------------------------------------------------------------------------------------+ METHOD primeFactors
| OBJECT | 0x42cc13a0 | PARAMETERS[0] @Integer[946738738]
+-----------------+---------------------------------------------------------------------------------------------------------+ IS-RETURN true
| CLASS | GaOgnlUtilsTest | IS-EXCEPTION false
+-----------------+---------------------------------------------------------------------------------------------------------+ RETURN-OBJ @ArrayList[
| METHOD | printAddress | @Integer[2],
+-----------------+---------------------------------------------------------------------------------------------------------+ @Integer[11],
| PARAMETERS[0] | Address@53448f87 | @Integer[17],
+-----------------+---------------------------------------------------------------------------------------------------------+ @Integer[2531387],
| IS-RETURN | false | ]
+-----------------+---------------------------------------------------------------------------------------------------------+ Time fragment[1004] successfully replayed.
| IS-EXCEPTION | true | Affect(row-cnt:1) cost in 14 ms.
+-----------------+---------------------------------------------------------------------------------------------------------+
| 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.
$
``` ```
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。 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。

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