MacOS + gdb 亲测有效

MacOS使用GDB调试程序

系统信息: macOS Mojave 10.14.6

安装GDB

安装最新

brew install gdb --HEAD

调试程序出错

错误信息

Unable to find Mach task port for process-id 57906: (os/kern) failure (0x5).
 (please check gdb is codesigned - see taskgated(8))

解决方法

• 打开钥匙串访问
  
• 创建证书
  
  一直点继续，知道下面这一步。选择系统。
  
  如果选择系统，有些人会成功，有些人会失败，比如我，选择系统时会出现下面的错误
  
  重复上面的步骤，知道要选择登录/系统这一步。此时选择登录，成功创建后如下
  

可以看到刚刚创建的： 登录 - 我的证书 - gdb_cert

---

1. 解锁钥匙串系统
   
2. 选中gdb_cert并拖动到系统中
   
   可以看到系统 - 我的证书 - gdb_bert
3. 更改信任
   
   双击或右击gdb_cert，打开简介，将信任更改为始终信任
   

• 设置系统偏好
系统偏好设置 - 用户与群组 - 登录选项 - 解锁 - 编辑

打开目录实用工具 - 解锁 - 启用Root用户
  
• 创建gdb.xml

<plist version="1.0">
<dict>
    <key>com.apple.security.cs.debuggerkey>
    <true/>
dict>
plist>

• 打开终端
  在终端输入

codesign --entitlements gdb.xml -fs gdb_cert $(which gdb)

• 重启电脑

后续

运行gdb

第一次运行gdb xxx可能卡死，如下。

[New Thread 0x2703 of process 757]

杀死程序，重新执行即可。

错误参考

1.No symbol table is loaded. Use the “file” command.

使用gdb调试程序时，出现以下错误和警告

1. 错误

No symbol table is loaded.  Use the "file" command.

2. 警告

warning: `/BuildRoot/Library/Caches/com.apple.xbs/Binaries/Libc_darwin/install/TempContent/Objects/Libc.build/libsystem_darwin.dylib.build/Objects-normal/x86_64/bsd.o': can't open to read symbols: No such file or directory.
warning: `/BuildRoot/Library/Caches/com.apple.xbs/Binaries/Libc_darwin/install/TempContent/Objects/Libc.build/libsystem_darwin.dylib.build/Objects-normal/x86_64/darwin_vers.o': can't open to read symbols: No such file or directory.
warning: `/BuildRoot/Library/Caches/com.apple.xbs/Binaries/Libc_darwin/install/TempContent/Objects/Libc.build/libsystem_darwin.dylib.build/Objects-normal/x86_64/dirstat.o': can't open to read symbols: No such file or directory.
warning: `/BuildRoot/Library/Caches/com.apple.xbs/Binaries/Libc_darwin/install/TempContent/Objects/Libc.build/libsystem_darwin.dylib.build/Objects-normal/x86_64/dirstat_collection.o': can't open to read symbols: No such file or directory.
warning: `/BuildRoot/Library/Caches/com.apple.xbs/Binaries/Libc_darwin/install/TempContent/Objects/Libc.build/libsystem_darwin.dylib.build/Objects-normal/x86_64/err.o': can't open to read symbols: No such file or directory.
warning: `/BuildRoot/Library/Caches/com.apple.xbs/Binaries/Libc_darwin/install/TempContent/Objects/Libc.build/libsystem_darwin.dylib.build/Objects-normal/x86_64/exception.o': can't open to read symbols: No such file or directory.
warning: `/BuildRoot/Library/Caches/com.apple.xbs/Binaries/Libc_darwin/install/TempContent/Objects/Libc.build/libsystem_darwin.dylib.build/Objects-normal/x86_64/init.o': can't open to read symbols: No such file or directory.
warning: `/BuildRoot/Library/Caches/com.apple.xbs/Binaries/Libc_darwin/install/TempContent/Objects/Libc.build/libsystem_darwin.dylib.build/Objects-normal/x86_64/mach.o': can't open to read symbols: No such file or directory.
warning: `/BuildRoot/Library/Caches/com.apple.xbs/Binaries/Libc_darwin/install/TempContent/Objects/Libc.build/libsystem_darwin.dylib.build/Objects-normal/x86_64/stdio.o': can't open to read symbols: No such file or directory.
warning: `/BuildRoot/Library/Caches/com.apple.xbs/Binaries/Libc_darwin/install/TempContent/Objects/Libc.build/libsystem_darwin.dylib.build/Objects-normal/x86_64/stdlib.o': can't open to read symbols: No such file or directory.
warning: `/BuildRoot/Library/Caches/com.apple.xbs/Binaries/Libc_darwin/install/TempContent/Objects/Libc.build/libsystem_darwin.dylib.build/Objects-normal/x86_64/string.o': can't open to read symbols: No such file or directory.
warning: `/BuildRoot/Library/Caches/com.apple.xbs/Binaries/Libc_darwin/install/TempContent/Objects/Libc.build/libsystem_darwin.dylib.build/Objects-normal/x86_64/variant.o': can't open to read symbols: No such file or directory.

解决方法：
使用g++编译程序时，添加-ggdb选项

g++ -ggdb main.cpp -o main -std=c++11 -Wall

sudo gdb main

参考

1. https://stackoverflow.com/questions/52699661/macos-mojave-how-to-achieve-codesign-to-enable-debugging-gdb