GDB usage

gcc parameter

shell gcc -g something.c -o something  // "-g" means debug informations added  // source code will be added to the onbjected file

Mac OS configuration

"please check gdb is codesigned - see taskgated(8)"

This error occurs because OSX implements a pid access policy which requires a digital signature for binaries to access other processes pids. To enable gdb access to other processes, we must first code sign the binary. This signature depends on a particular certificate, which the user must create and register with the system.

https://sourceware.org/gdb/wiki/PermissionsDarwin

先创建一个文件 gdb-entitlement.xml，内容为:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>com.apple.security.cs.debugger</key>
    <true/>
</dict>
</plist>
</pre>
再执行:
codesign --entitlements gdb-entitlement.xml -fs gdb-cert $(which gdb)

command

``shell lay next: CLT interface