gstack命令的说明如下：

NAME       gstack - print a stack trace of a running processSYNOPSIS       gstack pidDESCRIPTION       gstack  attaches  to the active process named by the pid on the command line, and prints out an execution stack trace.  If ELF sym‐bols exist in the binary (usually the case unless you have run strip(1)), then symbolic addresses are printed as well.       If the process is part of a thread group, then gstack will print out a stack trace for each of the threads in the group.

它的用法很简单，只要在gstack命令后面跟上某个进程pid就可以，例如查询一个newthread进程的运行堆栈信息：

[yuanping@Linux ~]$ gstack `pgrep newthread | head -1`Thread 2 (Thread 0xb77d7b40 (LWP 4165)):#0  0x00e13424 in __kernel_vsyscall ()#1  0x4ebf79c6 in nanosleep () from /lib/libc.so.6#2  0x4ebf77df in sleep () from /lib/libc.so.6#3  0x0804853a in thread ()#4  0x4ed27cd3 in start_thread () from /lib/libpthread.so.0#5  0x4ec324de in clone () from /lib/libc.so.6Thread 1 (Thread 0xb77d8900 (LWP 4164)):#0  0x00e13424 in __kernel_vsyscall ()#1  0x4ed28dd5 in pthread_join () from /lib/libpthread.so.0#2  0x080485bd in main ()[yuanping@Linux ~]$