211 lines
9.7 KiB
Markdown
211 lines
9.7 KiB
Markdown
# 1. gdb coredump分析
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  本文介绍ubuntu系统环境下coredump文件的分析方法。**重要：此文的场景在Ubuntu每次开机后需要重复设置coredump调试环境，例如开启coredump和设置coredump文件生成路径。**
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**一个coredump示例：**
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```code
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$ ../output_files/test/bin/McuManagerTest --gtest_filter=McuManagerTest.RH_INTEGRATION_McuManager_AUTO_OtherSideSendIpcMission
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Note: Google Test filter = McuManagerTest.RH_INTEGRATION_McuManager_AUTO_OtherSideSendIpcMission
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[==========] Running 1 test from 1 test suite.
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[----------] Global test environment set-up.
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[----------] 1 test from McuManagerTest
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NewLog succeed.
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LogImplInit
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[ RUN ] McuManagerTest.RH_INTEGRATION_McuManager_AUTO_OtherSideSendIpcMission
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2024-05-15 17:43:04,782 INFO [default] [McuManagerMakePtr.cpp:23]:CreateMcuManager is ok.
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2024-05-15 17:43:04,783 INFO [default] [IMcuManager.cpp:72]:Instance changed succeed.
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2024-05-15 17:43:04,783 INFO [default] [UartDeviceImpl.cpp:277]:Create the uart device object.
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Can't Open Serial Port: No such file or directory
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2024-05-15 17:43:04,784 ERROR [default] [McuDevice.cpp:51]:IUartOpen failed.
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2024-05-15 17:43:04,787 INFO [default] [UartDeviceImpl.cpp:277]:Create the uart device object.
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Can't Open Serial Port: No such file or directory
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2024-05-15 17:43:04,787 ERROR [default] [McuDevice.cpp:51]:IUartOpen failed.
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terminate called without an active exception
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Aborted (core dumped)
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```
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## 1.1. coredump文件生成路径查询
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```code
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$ cat /proc/sys/kernel/core_pattern
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|/usr/share/apport/apport -p%p -s%s -c%c -d%d -P%P -u%u -g%g -- %E
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```
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修改coredump文件生成路径：
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```code
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$ sudo sh -c 'echo /home/xiaojiazhu/project/ipc-sdk/ipc/cmake-shell/core.%e.%p > /proc/sys/kernel/core_pattern'
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$ cat /proc/sys/kernel/core_pattern
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/home/xiaojiazhu/project/rkipc/battery/ipc-rk1106/ipc-sdk/cmake-shell/core.%e.%p
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```
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命令：
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sudo sh -c 'echo /path/core.%e.%p > /proc/sys/kernel/core_pattern'
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例如(根据自己的实际情况写路径参数)：
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```code
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sudo sh -c 'echo /home/xiaojiazhu/project/rkipc/battery/ipc-rk1106/ipc-sdk/cmake-shell/core.%e.%p > /proc/sys/kernel/core_pattern'
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```
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**发现路径下并未生成coredump文件**
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```code
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$ ulimit -a
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core file size (blocks, -c) 0 // 0表示终端未开启core dump
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data seg size (kbytes, -d) unlimited
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scheduling priority (-e) 0
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file size (blocks, -f) unlimited
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pending signals (-i) 63499
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max locked memory (kbytes, -l) 65536
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max memory size (kbytes, -m) unlimited
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open files (-n) 1024
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pipe size (512 bytes, -p) 8
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POSIX message queues (bytes, -q) 819200
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real-time priority (-r) 0
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stack size (kbytes, -s) 8192
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cpu time (seconds, -t) unlimited
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max user processes (-u) 63499
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virtual memory (kbytes, -v) unlimited
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file locks (-x) unlimited
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```
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解决：
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```code
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$ ulimit -c unlimited
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```
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## 1.2. gdb查看堆栈信息
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**Ubuntu系统需要加sudo执行程序才会生成coredump文件。**
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### 1.2.1. 无法识别coredump文件
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  在gdb中无法识别coredump文件，如下所示：
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```code
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$ sudo gdb ../output_files/test/bin/McuManagerTest core.smbd.3390383
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[sudo] password for xiaojiazhu:
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Sorry, try again.
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[sudo] password for xiaojiazhu:
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GNU gdb (Ubuntu 9.2-0ubuntu1~20.04.1) 9.2
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Copyright (C) 2020 Free Software Foundation, Inc.
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License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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This is free software: you are free to change and redistribute it.
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There is NO WARRANTY, to the extent permitted by law.
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Type "show copying" and "show warranty" for details.
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This GDB was configured as "x86_64-linux-gnu".
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Type "show configuration" for configuration details.
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For bug reporting instructions, please see:
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<http://www.gnu.org/software/gdb/bugs/>.
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Find the GDB manual and other documentation resources online at:
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<http://www.gnu.org/software/gdb/documentation/>.
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For help, type "help".
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Type "apropos word" to search for commands related to "word"...
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Reading symbols from ../output_files/test/bin/McuManagerTest...
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warning: core file may not match specified executable file. // 表示coredump文件与可执行文件不匹配
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[New LWP 3390383]
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Core was generated by `/usr/sbin/smbd --foreground --no-process-group'.
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Program terminated with signal SIGABRT, Aborted.
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#0 0x00007fd59718600b in ?? ()
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(gdb) bt
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#0 0x00007fd59718600b in ?? ()
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#1 0x0000000000001c80 in ?? ()
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#2 0x0000000000000000 in ?? ()
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```
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**由于gdb和asan同时启用会冲突，导致无法识别coredump文件。解决办法如下：**
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修改：//build/sdk_config.cmake
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```code
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# Gdb debug
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if(${TARGET_PLATFORM} MATCHES ${DEFINE_LINUX})
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message("---------------------------Debug mode.-----------------------")
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SET(CMAKE_BUILD_TYPE "Debug")
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O0 -Wall -g -ggdb")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O0 -Wall -g -ggdb")
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SET(CMAKE_CXX_FLAGS_DEBUG "$ENV{CXXFLAGS} -O0 -Wall -g -ggdb")
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SET(CMAKE_CXX_FLAGS_RELEASE "$ENV{CXXFLAGS} -O3 -Wall")
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# asan
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# set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=leak -fsanitize=address -fno-omit-frame-pointer -fsanitize=undefined")
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# set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=leak -fsanitize=address -fno-omit-frame-pointer -fsanitize=undefined")
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else()
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message("---------------------------Release mode.-----------------------")
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SET(CMAKE_BUILD_TYPE "Release")
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Os")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Os")
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endif()
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```
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解决后：
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```code
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$ sudo gdb ../output_files/test/bin/McuManagerTest core.McuManagerTest.3406751
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GNU gdb (Ubuntu 9.2-0ubuntu1~20.04.1) 9.2
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Copyright (C) 2020 Free Software Foundation, Inc.
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License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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This is free software: you are free to change and redistribute it.
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There is NO WARRANTY, to the extent permitted by law.
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Type "show copying" and "show warranty" for details.
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This GDB was configured as "x86_64-linux-gnu".
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Type "show configuration" for configuration details.
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For bug reporting instructions, please see:
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<http://www.gnu.org/software/gdb/bugs/>.
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Find the GDB manual and other documentation resources online at:
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<http://www.gnu.org/software/gdb/documentation/>.
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For help, type "help".
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Type "apropos word" to search for commands related to "word"...
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Reading symbols from ../output_files/test/bin/McuManagerTest...
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[New LWP 3406751]
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[New LWP 3406753]
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[New LWP 3406752]
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[Thread debugging using libthread_db enabled]
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Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
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Core was generated by `../output_files/test/bin/McuManagerTest --gtest_filter=McuManagerTest.RH_INTEGR'.
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Program terminated with signal SIGABRT, Aborted.
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#0 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
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50 ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
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[Current thread is 1 (Thread 0x7fd355968740 (LWP 3406751))]
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(gdb) bt
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#0 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
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#1 0x00007fd35598f859 in __GI_abort () at abort.c:79
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#2 0x00007fd355d678d1 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
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#3 0x00007fd355d7337c in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
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#4 0x00007fd355d733e7 in std::terminate() () from /lib/x86_64-linux-gnu/libstdc++.so.6
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#5 0x000055c247b3ae41 in std::thread::operator= (__t=..., this=0x55c248d19748) at /usr/include/c++/9/thread:152
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#6 McuProtocol::Init (this=this@entry=0x55c248d196f8) at /home/xiaojiazhu/project/rkipc/battery/ipc-rk1106/ipc-sdk/utils/McuProtocol/src/McuProtocol.cpp:58
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#7 0x000055c247b03e57 in McuManagerImpl::Init (this=0x55c248d19680)
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at /home/xiaojiazhu/project/rkipc/battery/ipc-rk1106/ipc-sdk/middleware/McuManager/src/McuManagerImpl.cpp:46
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#8 0x000055c247acd3d4 in McuManagerTest::McuManagerTest_RH_INTEGRATION_McuManager_AUTO_OtherSideSendIpcMission_Test::TestBody (this=<optimized out>)
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at /usr/include/c++/9/bits/shared_ptr_base.h:1020
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#9 0x000055c247b303fd in void testing::internal::HandleExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*) () at /home/xiaojiazhu/project/rkipc/battery/ipc-rk1106/ipc-sdk/utils/McuProtocol/./include/McuProtocol.h:121
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#10 0x000055c247b23343 in testing::Test::Run() () at /home/xiaojiazhu/project/rkipc/battery/ipc-rk1106/ipc-sdk/utils/McuProtocol/./include/McuProtocol.h:121
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#11 0x000055c247b2342b in testing::TestInfo::Run() ()
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at /home/xiaojiazhu/project/rkipc/battery/ipc-rk1106/ipc-sdk/utils/McuProtocol/./include/McuProtocol.h:121
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#12 0x000055c247b2376e in testing::TestSuite::Run() ()
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at /home/xiaojiazhu/project/rkipc/battery/ipc-rk1106/ipc-sdk/utils/McuProtocol/./include/McuProtocol.h:121
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#13 0x000055c247b2a0fa in testing::internal::UnitTestImpl::RunAllTests() ()
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at /home/xiaojiazhu/project/rkipc/battery/ipc-rk1106/ipc-sdk/utils/McuProtocol/./include/McuProtocol.h:121
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#14 0x000055c247b3085e in bool testing::internal::HandleExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*) ()
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at /home/xiaojiazhu/project/rkipc/battery/ipc-rk1106/ipc-sdk/utils/McuProtocol/./include/McuProtocol.h:121
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#15 0x000055c247b23529 in testing::UnitTest::Run() ()
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at /home/xiaojiazhu/project/rkipc/battery/ipc-rk1106/ipc-sdk/utils/McuProtocol/./include/McuProtocol.h:121
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#16 0x000055c247ac9287 in RUN_ALL_TESTS ()
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at /home/xiaojiazhu/project/rkipc/battery/ipc-rk1106/ipc-sdk/external/gtest/googletest-release-1.11.0/googletest/include/gtest/gtest.h:2490
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#17 main (argc=<optimized out>, argv=<optimized out>)
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at /home/xiaojiazhu/project/rkipc/battery/ipc-rk1106/ipc-sdk/test/middleware/McuManager/mainTest.cpp:22
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(gdb)
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```
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