From 8101c141b697d00386855ec3dbc8df1301bca722 Mon Sep 17 00:00:00 2001
From: yanmengzhao1 <yanmengzhao1@huawei.com>
Date: Tue, 21 Mar 2023 14:54:30 +0800
Subject: [PATCH] update faultlogger guide

Signed-off-by: yanmengzhao1 <yanmengzhao1@huawei.com>
---
 .../figures/zh-cn_image_0000001261812333.png  | Bin 12336 -> 0 bytes
 .../figures/zh-cn_image_0000001261812334.png  | Bin 0 -> 7763 bytes
 .../subsystems/subsys-dfx-faultlogger.md      | 154 ++++++++++--------
 3 files changed, 85 insertions(+), 69 deletions(-)
 delete mode 100644 zh-cn/device-dev/subsystems/figures/zh-cn_image_0000001261812333.png
 create mode 100644 zh-cn/device-dev/subsystems/figures/zh-cn_image_0000001261812334.png

diff --git a/zh-cn/device-dev/subsystems/figures/zh-cn_image_0000001261812333.png b/zh-cn/device-dev/subsystems/figures/zh-cn_image_0000001261812333.png
deleted file mode 100644
index 76fd15e43b8ccf8566ed55cc0592d3f3e6580319..0000000000000000000000000000000000000000
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diff --git a/zh-cn/device-dev/subsystems/subsys-dfx-faultlogger.md b/zh-cn/device-dev/subsystems/subsys-dfx-faultlogger.md
index b290303ffd..06e91d7b7f 100644
--- a/zh-cn/device-dev/subsystems/subsys-dfx-faultlogger.md
+++ b/zh-cn/device-dev/subsystems/subsys-dfx-faultlogger.md
@@ -18,15 +18,15 @@ FaultLogger承载OpenHarmony系统上的故障记录功能，按照服务对象
 
   **图1** 进程崩溃处理流程图
 
-![zh-cn_image_0000001261812333](figures/zh-cn_image_0000001261812333.png)
+![zh-cn_image_0000001261812333](figures/zh-cn_image_0000001261812334.png)
 
-1. 进程安装信号处理器后，通过DFX_SignalHandler函数检测并响应进程崩溃异常信号；
+1. 进程安装信号处理器后，通过DFX_SignalHandler函数检测并响应由Kernel抛出的进程崩溃异常信号；
 
 2. SignalHandler检测到异常信号后Fork出子进程，并运行ProcessDump程序开始dump崩溃进程和线程的堆栈信息；
 
-3. ProcessDump程序在读取异常堆栈信息后将日志写入到Faultloggerd中的临时存储目录，进而生成完整的崩溃日志；
+3. ProcessDump程序向Faultloggerd服务申请用于存储故障日志的文件句柄，在读取到异常堆栈信息后写入到该文件中，进而生成完整的崩溃日志；
 
-4. Faultloggerd根据需要将故障通过Hiview提供的AddFaultLog()接口进行上报，hiview将处理生成简化的崩溃日志，并上报Hisysevent事件。
+4. ProcessDump完成崩溃日志收集后，根据需要将故障通过Hiview提供的AddFaultLog()接口进行上报，hiview将处理生成简化的崩溃日志，并上报Hisysevent事件。
 
 基于这样的设计，在资源有限的小型系统上可只部署Faultloggerd，也依然可以获取用于定位崩溃问题的日志。
 
@@ -39,14 +39,14 @@ Faultloggerd意在为开发者在开发测试过程中遇到的崩溃或卡死
 
   **表1** Faultloggerd模块应用场景
 
-| 场景描述 | 使用工具 | 使用方式 | 
+| 场景描述 | 使用工具 | 使用方式 |
 | -------- | -------- | -------- |
-| 了解函数的调用顺序 | DumpCatcher&nbsp;API | 参见：[使用DumpCatcher获取调用栈](#使用dumpcatcher获取调用栈) | 
-| 应用卡死/CPU占用高 | ProcessDump | 参见：[使用ProcessDump获取调用栈](#使用processdump获取调用栈) | 
-| 进程未处理信号崩溃 | 崩溃日志和addr2line工具 | 参见：[基于崩溃日志对问题进行定位](#基于崩溃日志对问题进行定位) | 
+| 了解函数的调用顺序 | DumpCatcher API | 参见：[使用DumpCatcher接口获取调用栈](#使用dumpcatcher接口获取调用栈) |
+| 应用卡死/CPU占用高 | DumpCatcher Command Tool | 参见：[使用DumpCatcher命令获取调用栈](#使用dumpcatcher命令获取调用栈) |
+| 崩溃问题定位 | 崩溃日志和addr2line工具 | 参见：[基于崩溃日志定位问题](#基于崩溃日志定位问题) |
 
 
-## 使用DumpCatcher获取调用栈
+## 使用DumpCatcher接口获取调用栈
 
 
 ### 接口说明
@@ -55,57 +55,70 @@ DumpCatcher可以抓取OpenHarmony指定进程（线程）的调用栈。
 
   **表2** DumpCatcher接口说明
 
-| 类 | 方法 | 描述 | 
+| 类 | 方法 | 描述 |
 | -------- | -------- | -------- |
-| DfxDumpCatcher | bool&nbsp;DumpCatch(const&nbsp;int&nbsp;pid,&nbsp;const&nbsp;int&nbsp;tid,&nbsp;std::string&amp;&nbsp;msg) | &nbsp;&nbsp;接口返回值：<br/>-&nbsp;true：回栈成功，回栈信息存储在msg字符串对象中；<br/>-&nbsp;false：回栈失败。<br/>&nbsp;&nbsp;输入参数：<br/>-&nbsp;pid：目标进程号；<br/>-&nbsp;tid：目标线程号，如果需要回栈进程中的所有线程，则tid设定为0；<br/>&nbsp;&nbsp;输出参数：<br/>-&nbsp;msg：如果回栈成功，则通过msg返回调用栈信息。 | 
+| DfxDumpCatcher | bool DumpCatch(const int pid, const int tid, std::string&amp; msg) |   接口返回值：<br/>- true：回栈成功，回栈信息存储在msg字符串对象中；<br/>- false：回栈失败。<br/>  输入参数：<br/>- pid：目标进程号；<br/>- tid：目标线程号，如果需要回栈进程中的所有线程，则tid设定为0；<br/>  输出参数：<br/>- msg：如果回栈成功，则通过msg返回调用栈信息。 |
+| DfxDumpCatcher | bool DumpCatchMix(const int pid, const int tid, std::string&amp; msg) |   接口返回值：<br/>- true：回栈成功，回栈信息存储在msg字符串对象中；<br/>- false：回栈失败。<br/>  输入参数：<br/>- pid：目标进程号；<br/>- tid：目标线程号，如果需要回栈进程中的所有线程，则tid设定为0；<br/>  输出参数：<br/>- msg：如果回栈成功，则通过msg返回混合栈信息。 |
+| DfxDumpCatcher | bool DumpCatchFd(const int pid, const int tid, std::string&amp; msg, int fd) |   接口返回值：<br/>- true：回栈成功，回栈信息存储在msg字符串对象中；<br/>- false：回栈失败。<br/>  输入参数：<br/>- pid：目标进程号；<br/>- tid：目标线程号，如果需要回栈进程中的所有线程，则tid设定为0；<br/>- fd：指定写入的文件句柄号；<br/>  输出参数：<br/>- msg：如果回栈成功，则通过msg返回调用栈信息。 |
+| DfxDumpCatcher | bool DumpCatchMultiPid(const std::vector\<int> pidV, std::string&amp; msg) |   接口返回值：<br/>- true：回栈成功，回栈信息存储在msg字符串对象中；<br/>- false：回栈失败。<br/>  输入参数：<br/>- pidV：目标进程号列表；<br/>  输出参数：<br/>- msg：如果回栈成功，则通过msg返回调用栈信息。 |
 
 > ![icon-note.gif](public_sys-resources/icon-note.gif) **说明：**
-> 当调用此接口的进程id与目标pid不一致时需要调用者是管理员（system，root）用户。当抓取非本用户组进程调用栈时还需具备读取对方/proc/pid/maps及ptrace到对方进程的权限。
+> 当调用此接口的进程id与目标pid不一致时需要调用者是管理员（system，root）用户。
 
 
 ### 开发实例
 
 
-系统应用开发者可以用DumpCatcher在自己的应用中获取指定进程（线程）的调用栈。下文以dumpcatcherdemo模块使用DumpCatcher接口获取调用栈作为实例进行讲解。
+系统应用开发者可以用DumpCatcher在自己的应用中获取指定进程（线程）的调用栈。下文以dumpcatcherdemo模块使用DumpCatcher基础接口获取调用栈作为实例进行讲解。
 
 
 1. 编译构建文件添加dumpcatcher依赖：以/base/hiviewdfx/faultloggerd/example/BUILD.gn为例，在include_dirs中添加DfxDumpCatcher头文件路径，并在deps中添加“//base/hiviewdfx/faultloggerd/interfaces/innerkits/dump_catcher:lib_dfx_dump_catcher”模块依赖。
-     
+
    ```
    import("//base/hiviewdfx/faultloggerd/faultloggerd.gni")
    import("//build/ohos.gni")
-   
+
    config("dumpcatcherdemo_config") {
      visibility = [ ":*" ]
-   
+
      include_dirs = [
        ".",
        "//utils/native/base/include",
        "//base/hiviewdfx/faultloggerd/interfaces/innerkits/dump_catcher/include/",  # 添加dumpcatcher头文件路径
      ]
    }
-   
-   ohos_executable("dumpcatcherdemo") {  sources = [ "dump_catcher_demo.cpp" ]  configs = [ ":dumpcatcherdemo_config" ]  deps = [     "//base/hiviewdfx/faultloggerd/interfaces/innerkits/dump_catcher:lib_dfx_dump_catcher", # 添加dumpcathcer模块依赖    "//utils/native/base:utils",  ]  external_deps = [ "hilog_native:libhilog" ]  install_enable = true  part_name = "faultloggerd"  subsystem_name = "hiviewdfx"
+
+   ohos_executable("dumpcatcherdemo") {
+    sources = [ "dump_catcher_demo.cpp" ]
+    configs = [ ":dumpcatcherdemo_config" ]
+    deps = [
+      "//base/hiviewdfx/faultloggerd/interfaces/innerkits/dump_catcher:lib_dfx_dump_catcher", # 添加dumpcathcer模块依赖
+      "//utils/native/base:utils",
+    ]
+    external_deps = [ "hilog_native:libhilog" ]
+    install_enable = true
+    part_name = "faultloggerd"
+    subsystem_name = "hiviewdfx"
    }
    ```
 
 2. 头文件定义用到的函数：以/base/hiviewdfx/faultloggerd/example/dump_catcher_demo.h为例，本样例代码中，通过调用栈深度测试的测试函数来构造一个指定深度的调用栈。
-     
+
    ```
    #ifndef DUMP_CATCHER_DEMO_H
    #define DUMP_CATCHER_DEMO_H
-   
+
    #include <inttypes.h>
-   
+
    #define NOINLINE __attribute__((noinline))
-   
+
    // 定义该宏函数用于自动生成函数调用链
    #define GEN_TEST_FUNCTION(FuncNumA, FuncNumB)          \
        __attribute__((noinline)) int TestFunc##FuncNumA() \
        {                                                  \
            return TestFunc##FuncNumB();                   \
        }
-   
+
    // 调用栈深度测试的测试函数
    int TestFunc0(void);
    int TestFunc1(void);
@@ -118,22 +131,22 @@ DumpCatcher可以抓取OpenHarmony指定进程（线程）的调用栈。
    int TestFunc8(void);
    int TestFunc9(void);
    int TestFunc10(void);
-   
+
    #endif // DUMP_CATCHER_DEMO_H
    ```
 
 3. 在源文件中调用DumpCatch接口：以/base/hiviewdfx/faultloggerd/example/dump_catcher_demo.cpp为例，引用dfx_dump_catcher.h头文件，声明DfxDumpCatcher对象，通过宏函数构造函数调用链，并最后调用DumpCatch接口方法，传入需要抓取调用栈的进程号、线程号。
-     
+
    ```
    #include "dump_catcher_demo.h"
-   
+
    #include <iostream>
    #include <string>
    #include <unistd.h>
    // dfx_dump_catcher.h头文件引入
    #include "dfx_dump_catcher.h"
    using namespace std;
-   
+
    NOINLINE int TestFunc10(void)
    {
        OHOS::HiviewDFX::DfxDumpCatcher dumplog;
@@ -144,7 +157,7 @@ DumpCatcher可以抓取OpenHarmony指定进程（线程）的调用栈。
        }
        return 0;
    }
-   
+
    // 通过宏函数自动生成函数调用链
    GEN_TEST_FUNCTION(0, 1)
    GEN_TEST_FUNCTION(1, 2)
@@ -156,7 +169,7 @@ DumpCatcher可以抓取OpenHarmony指定进程（线程）的调用栈。
    GEN_TEST_FUNCTION(7, 8)
    GEN_TEST_FUNCTION(8, 9)
    GEN_TEST_FUNCTION(9, 10)
-   
+
    int main(int argc, char *argv[])
    {
        TestFunc0();
@@ -165,55 +178,57 @@ DumpCatcher可以抓取OpenHarmony指定进程（线程）的调用栈。
    ```
 
 
-## 使用ProcessDump获取调用栈
+## 使用DumpCatcher命令获取调用栈
 
 
 ### 工具说明
 
-ProcessDump是一个抓取调用栈的命令行工具，在OpenHarmony系统中可直接使用，该工具通过-p、-t参数指定进程和线程，命令执行后在命令行窗口打印指定进程的线程栈信息。
+DumpCatcher Command Tool是一个抓取调用栈的命令行工具，在OpenHarmony系统中可直接使用，该工具通过-p、-t参数指定进程和线程，命令执行后在命令行窗口打印指定进程的线程栈信息。还可通过添加-m参数来抓取应用进程的JS Native混合栈。
 
-  **表3** ProcessDump命令行工具使用说明
+  **表3** DumpCatcher Command Tool使用说明
 
-| 工具名称 | 命令行工具路径 | 执行命令 | 描述 | 
+| 工具名称 | 命令行工具路径 | 执行命令 | 描述 |
 | -------- | -------- | -------- | -------- |
-| processdump | /system/bin | -&nbsp;processdump&nbsp;-p&nbsp;[pid]<br/>-&nbsp;processdump&nbsp;-p&nbsp;[pid]&nbsp;-t&nbsp;[tid] | **参数说明：**<br/>-&nbsp;-p&nbsp;[pid]：打印指定进程下面的所有线程栈信息。<br/>-&nbsp;-p&nbsp;[pid]&nbsp;-t&nbsp;[tid]：打印指定进程下面的指定线程信息。<br/>**返回值说明：**<br/>如果栈信息解析成功，则将信息显示到标准输出；失败则打印错误信息。 | 
-
-
-> ![icon-note.gif](public_sys-resources/icon-note.gif) **说明：**
-> 此工具需要在root下使用，或调用者有权限ptrace到目标进程，并读取目标进程的smaps。
+| dumpcatcher | /system/bin | - dumpcatcher -p [pid]<br/>- dumpcatcher -p [pid] -t [tid]<br/>- dumpcatcher -m -p [pid]<br/>- dumpcatcher -m -p [pid] -t [tid]<br/> | **参数说明：**<br/>- -p [pid]：打印指定进程下面的所有线程栈信息。<br/>- -p [pid] -t [tid]：打印指定进程下面的指定线程信息。<br/>- -m -p [pid]：打印指定进程下面的所有线程混合栈信息。<br/>- -m -p [pid] -t [tid]：打印指定进程下面的指定线程混合栈信息。<br/>**返回值说明：**<br/>如果栈信息解析成功，则将信息显示到标准输出；失败则打印错误信息。 |
 
 
 ### 使用实例
 
-通过processdump命令行工具打印hiview进程的调用栈。
+通过dumpcatcher命令打印hiview进程的调用栈。
+
 
-  
 ```
-# ps -A | grep hiview
-  114 ?        00:00:00 hiview
-# processdump -p 114 -t 114
-Tid:114, Name:hiview
-#00 pc 0000000000089824(00000000b6f44824) /system/lib/ld-musl-arm.so.1(ioctl+68)
-#01 pc 000000000002a709(00000000b6c56709) /system/lib/libipc_core.z.so(_ZN4OHOS15BinderConnector11WriteBinderEmPv+16)
-#02 pc 000000000002ba75(00000000b6c57a75) /system/lib/libipc_core.z.so(_ZN4OHOS13BinderInvoker18TransactWithDriverEb+224)
-#03 pc 000000000002bb37(00000000b6c57b37) /system/lib/libipc_core.z.so(_ZN4OHOS13BinderInvoker13StartWorkLoopEv+22)
-#04 pc 000000000002c211(00000000b6c58211) /system/lib/libipc_core.z.so(_ZN4OHOS13BinderInvoker10JoinThreadEb+36)
-#05 pc 0000000000038d07(00000000004bcd07) /system/bin/hiview(_ZNSt3__h6vectorINS_9sub_matchINS_11__wrap_iterIPKcEEEENS_9allocatorIS6_EEE8__appendEj+596)
-#06 pc 0000000000028655(00000000004ac655) /system/bin/hiview
-#07 pc 00000000000c2b08(00000000b6f7db08) /system/lib/ld-musl-arm.so.1(__libc_start_main+116)
-#08 pc 00000000000285f4(00000000004ac5f4) /system/bin/hiview
-#09 pc 0000000000028580(00000000004ac580) /system/bin/hiview
+# ps -ef |grep hiview
+hiview         240     1 0 17:01:49 ?     00:00:14 hiview
+root          1822  1560 7 20:56:36 pts/0 00:00:00 grep hiview
+# dumpcatcher -p 240 -t 240
+Result: 0 ( no error )
+Timestamp:2017-08-05 20:56:43.000
+Pid:240
+Uid:1201
+Process name:/system/bin/hiview
+Tid:240, Name:hiview
+#00 pc 00098f8c /system/lib/ld-musl-arm.so.1(ioctl+68)
+#01 pc 0000e2a1 /system/lib/chipset-pub-sdk/libipc_single.z.so
+#02 pc 0000ed59 /system/lib/chipset-pub-sdk/libipc_single.z.so
+#03 pc 0000ee1f /system/lib/chipset-pub-sdk/libipc_single.z.so
+#04 pc 0000f745 /system/lib/chipset-pub-sdk/libipc_single.z.so
+#05 pc 00037577 /system/bin/hiview
+#06 pc 00025973 /system/bin/hiview
+#07 pc 000db210 /system/lib/ld-musl-arm.so.1
+#08 pc 000258d8 /system/bin/hiview
+#09 pc 0002587c /system/bin/hiview
 ```
 
 
-## 基于崩溃日志对问题进行定位
+## 基于崩溃日志定位问题
 
 开发者可以通过faultloggerd生成的崩溃堆栈日志进行问题定位。本章节将主要介绍如何利用addr2line工具进行崩溃问题定位。
 
 1. 程序自崩溃或构造崩溃。
    例如将如下代码植入自己的代码中，调用触发一个无效内存访问故障（SIGSEGV）。
 
-     
+
    ```
    NOINLINE int TriggerSegmentFaultException()
    {
@@ -226,42 +241,43 @@ Tid:114, Name:hiview
    ```
 
 2. 获取崩溃函数调用栈日志。
-   因为存在未处理的异常，进程会在 /data/log/faultlog/temp路径下生成临时的日志文件，其命名规则为：
+   因为存在未处理的异常，进程会在/data/log/faultlog/temp路径下生成临时的日志文件，其命名规则为：
+
 
-     
    ```
    cppcrash-pid-time
    ```
 
    获取其生成的调用栈如下：
 
-     
+
    ```
+   Timestamp:2017-08-05 17:35:03.000
    Pid:816
    Uid:0
-   Process name:./crasher
+   Process name:./crasher_c
    Reason:Signal:SIGSEGV(SEGV_ACCERR)@0x0042d33d
    Fault thread Info:
    Tid:816, Name:crasher
+   #00 pc 0000332c /data/crasher(TriggerSegmentFaultException+15)(8bc37ceb8d6169e919d178fdc7f5449e)
+   #01 pc 000035c7 /data/crasher(ParseAndDoCrash+277)(8bc37ceb8d6169e919d178fdc7f5449e)
+   #02 pc 00003689 /data/crasher(main+39)(8bc37ceb8d6169e919d178fdc7f5449e)
+   #03 pc 000c3b08 /system/lib/ld-musl-arm.so.1(__libc_start_main+116)
+   #04 pc 000032f8 /data/crasher(_start_c+112)(8bc37ceb8d6169e919d178fdc7f5449e)
+   #05 pc 00003284 /data/crasher(_start+32)(8bc37ceb8d6169e919d178fdc7f5449e)
+   Registers:
    r0:0042d33d r1:0000000b r2:1725d4c4 r3:b6f9fa84
    r4:bec97e69 r5:b6fc0268 r6:0042d661 r7:bec97d60
    r8:00000000 r9:00000000 r10:00000000
    fp:bec97d20 ip:00000020 sp:bec97cd0 lr:b6f9fae4 pc:0042d32c
-   
-   #00 pc 000000000000332c(000000000042d32c) /data/crasher(TriggerSegmentFaultException+15)
-   #01 pc 00000000000035c7(000000000042d5c7) /data/crasher(ParseAndDoCrash+277)
-   #02 pc 0000000000003689(000000000042d689) /data/crasher(main+39)
-   #03 pc 00000000000c3b08(00000000b6fbbb08) /system/lib/ld-musl-arm.so.1(__libc_start_main+116)
-   #04 pc 00000000000032f8(000000000042d2f8) /data/crasher(_start_c+112)
-   #05 pc 0000000000003284(000000000042d284) /data/crasher(_start+32)
    ```
 
 3. 利用addr2line工具进行调用栈分析。
    使用addr2line工具根据偏移地址解析行号:
 
-     
+
    ```
-   root:~/OpenHarmony/out/hi3516dv300/exe.unstripped/hiviewdfx/faultloggerd$ addr2line -e crasher 000332c
+   root:~/OpenHarmony/out/hi3516dv300/exe.unstripped/hiviewdfx/faultloggerd$ addr2line -e crasher 0000332c
    base/hiviewdfx/faultloggerd/tools/crasher/dfx_crasher.c:57
    ```
 
-- 
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