//啟動gdb除錯
#gdb ./jccc
//設定預設跟蹤子程序
(gdb) set follow-fork-mode child
//設定當程式在gdb中停止，只有當前的執行緒會被停止，而其他的執行緒將會繼續執行(gdb預設程序的所有執行緒都會停止)
(gdb) set non-stop on
//接下來設定斷點
(gdb) b processcore.cpp:454
//執行jccc程式
(gdb) r -c /home/xiongli/workspace/paas/jchang/jc.conf
starting program: /home/xiongli/workspace/paas/jchang/jccc -c /home/xiongli/workspace/paas/jchang/jc.conf
[thread debugging using libthread_db enabled]
using host libthread_db library "/lib64/libthread_db.so.1".
setrlimit 500000 ok
[new process 989]
[thread debugging using libthread_db enabled]
using host libthread_db library "/lib64/libthread_db.so.1".
[new thread 0x7ffff7aef700 (lwp 990)]
[thread 0x7ffff7aef700 (lwp 990) exited]
[tcsetpgrp failed in terminal_inferior: no such process]
[new thread 0x7ffff7aef700 (lwp 991)]
[new thread 0x7ffff6ed0700 (lwp 992)]
[new thread 0x7ffff64cf700 (lwp 994)]
[new thread 0x7ffff5ace700 (lwp 995)]
[new thread 0x7ffff50cd700 (lwp 996)]
[new thread 0x7fffeffff700 (lwp 997)]
[new thread 0x7fffef5fe700 (lwp 998)]
[new thread 0x7fffeebfd700 (lwp 999)]
（這裡我們看到4個執行緒因為斷點停住了，其他執行緒如期執行）
thread 2.8 "jccc" hit breakpoint 1, thread_processor (lpvoid=0x70f5e0) at processcore.cpp:454
warning: source file is more recent than executable.
454 if(!g_processcore.m_mobilelist.isvalid(fd))
(gdb)
(gdb)
(gdb)
thread 2.9 "jccc" hit breakpoint 1, thread_processor (lpvoid=0x70fbb0) at processcore.cpp:454
454 if(!g_processcore.m_mobilelist.isvalid(fd))
thread 2.10 "jccc" hit breakpoint 1, thread_processor (lpvoid=0x710190) at processcore.cpp:454
454 if(!g_processcore.m_mobilelist.isvalid(fd))
thread 2.7 "jccc" hit breakpoint 1, thread_processor (lpvoid=0x70edb0) at processcore.cpp:454
454
//檢視一下所有執行緒資訊
(gdb) info threads
id target id frame
2.1 thread 0x7ffff7af17e0 (lwp 989) "jccc" (running)
2.3 thread 0x7ffff7aef700 (lwp 991) "jccc" (running)
2.4 thread 0x7ffff6ed0700 (lwp 992) "jccc" (running)
2.5 thread 0x7ffff64cf700 (lwp 994) "jccc" (running)
2.6 thread 0x7ffff5ace700 (lwp 995) "jccc" (running)
2.7 thread 0x7ffff50cd700 (lwp 996) "jccc" thread_processor (lpvoid=0x70edb0) at processcore.cpp:454
2.8 thread 0x7fffeffff700 (lwp 997) "jccc" thread_processor (lpvoid=0x70f5e0) at processcore.cpp:454
2.9 thread 0x7fffef5fe700 (lwp 998) "jccc" thread_processor (lpvoid=0x70fbb0) at processcore.cpp:454
2.10 thread 0x7fffeebfd700 (lwp 999) "jccc" thread_processor (lpvoid=0x710190) at processcore.cpp:454
//指定id可以切換到任何執行緒，這裡切換到要除錯的執行緒
(gdb) thread 2.7
[switching to thread 2.7 (thread 0x7ffff50cd700 (lwp 996))]
#0 thread_processor (lpvoid=0x70edb0) at processcore.cpp:454
454 if(!g_processcore.m_mobilelist.isvalid(fd))
//接下來，單步除錯當前執行緒
(gdb) p g_processcore.m_mobilelist.isvalid(fd)
$2 = true
(gdb) n
395 while(!g_bwantexit)
(gdb)
397 if(0!=pthread_mutex_lock(&(process->m_mutex_mobiletcptask)))
(gdb)
404 while(process->m_mobiletcptaskqueue.empty())
(gdb)
414 if(g_bwantexit)
(gdb)
421 fd = process->m_mobiletcptaskqueue.front();
(gdb)
422 process->m_mobiletcptaskqueue.pop();
(gdb)
423 int nqueuesize=process->m_mobiletcptaskqueue.size();
(gdb)
425 write_log(debug, "fd=%d,qsize=%d",nthreadindex,fd,nqueuesize);
(gdb)
427 if(0!=pthread_mutex_unlock(&(process->m_mutex_mobiletcptask)))
(gdb)
434 memset(slinedata,0,sizeof(slinedata));
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