[Embedded] GDB script -- check deadlock caused by mutex

Gdb scripts can be used to fix bugs easily. So I collect some gdb script here as reference.

The first script is used to find the deadlock caused by mutex misuse.

Reference : Debug Hacks

1. For example: debug.cmd

set pagination offset logging file debug.log
set logging overwrite
set logging on
start
set $addr1 = pthread_mutex_lock
set $addr2 = pthread_mutex_unlock
b *$addr1
b *$addr2
while 1
   c
   if $pc != $addr1 & $pc != $addr2
      quit
   end
   printf "## addr : %08x\n", *(int *)($esp+4)
   bt
end 

NOTE: when you press ctrl+c, this script will quit.

2. Usage

$ gdb ./a.out -x debug.cmd