pstack

显示每个进程的栈跟踪

补充说明

pstack命令 可显示每个进程的栈跟踪。 命令必须由相应进程的属主或 root 运行。可以使用 来确定进程挂起的位置。此命令允许使用的唯一选项是要检查的进程的 PID。

命令软件包下载地址：https://packages.debian.org/sid/pstack

实例

pstree以树结构显示进程

  1. pstree -p work | grep ad
  2. sshd(22669)---bash(22670)---ad_preprocess(4551)-+-{ad_preprocess}(4552)
  3.                                                 |-{ad_preprocess}(4553)
  4.                                                 |-{ad_preprocess}(4554)
  5.                                                 |-{ad_preprocess}(4555)
  6.                                                 |-{ad_preprocess}(4556)
  7.                                                 `-{ad_preprocess}(4557)

work为工作用户，-p为显示进程识别码，ad_preprocess共启动了6个子线程，加上主线程共7个线程。

  1. ps -Lf 4551
  2. UID        PID  PPID   LWP  C NLWP STIME TTY      stat   time CMD
  3. work      4551 22670  4551  2    7 16:30 pts/2    Sl+    0:02 ./ad_preprocess
  4. work      4551 22670  4552  0    7 16:30 pts/2    Sl+    0:00 ./ad_preprocess
  5. work      4551 22670  4553  0    7 16:30 pts/2    Sl+    0:00 ./ad_preprocess
  6. work      4551 22670  4554  0    7 16:30 pts/2    Sl+    0:00 ./ad_preprocess
  7. work      4551 22670  4555  0    7 16:30 pts/2    Sl+    0:00 ./ad_preprocess
  8. work      4551 22670  4556  0    7 16:30 pts/2    Sl+    0:00 ./ad_preprocess
  9. work      4551 22670  4557  0    7 16:30 pts/2    Sl+    0:00 ./ad_preprocess

进程共启动了7个线程

pstack显示每个进程的栈跟踪：

  1. pstack 4551
  2. Thread 7 (Thread 1084229984 (LWP 4552)):
  3. #0  0x000000302afc63dc in epoll_wait () from /lib64/tls/libc.so.6
  4. #1  0x00000000006f0730 in ub::EPollEx::poll ()
  5. #2  0x00000000006f172a in ub::NetReactor::callback ()
  6. #3  0x00000000006fbbbb in ub::UBTask::CALLBACK ()
  7. #4  0x000000302b80610a in start_thread () from /lib64/tls/libpthread.so.0
  8. #5  0x000000302afc6003 in clone () from /lib64/tls/libc.so.6
  9. #6  0x0000000000000000 in ?? ()
  10. Thread 6 (Thread 1094719840 (LWP 4553)):
  11. #0  0x000000302afc63dc in epoll_wait () from /lib64/tls/libc.so.6
  12. #1  0x00000000006f0730 in ub::EPollEx::poll ()
  13. #2  0x00000000006f172a in ub::NetReactor::callback ()
  14. #3  0x00000000006fbbbb in ub::UBTask::CALLBACK ()
  15. #4  0x000000302b80610a in start_thread () from /lib64/tls/libpthread.so.0
  16. #5  0x000000302afc6003 in clone () from /lib64/tls/libc.so.6
  17. #6  0x0000000000000000 in ?? ()
  18. Thread 5 (Thread 1105209696 (LWP 4554)):
  19. #0  0x000000302b80baa5 in __nanosleep_nocancel ()
  20. #1  0x000000000079e758 in comcm::ms_sleep ()
  21. #2  0x00000000006c8581 in ub::UbClientManager::healthyCheck ()
  22. #3  0x00000000006c8471 in ub::UbClientManager::start_healthy_check ()
  23. #4  0x000000302b80610a in start_thread () from /lib64/tls/libpthread.so.0
  24. #5  0x000000302afc6003 in clone () from /lib64/tls/libc.so.6
  25. #6  0x0000000000000000 in ?? ()
  26. Thread 4 (Thread 1115699552 (LWP 4555)):
  27. #0  0x000000302b80baa5 in __nanosleep_nocancel ()
  28. #1  0x0000000000482b0e in armor::armor_check_thread ()
  29. #2  0x000000302b80610a in start_thread () from /lib64/tls/libpthread.so.0
  30. #3  0x000000302afc6003 in clone () from /lib64/tls/libc.so.6
  31. #4  0x0000000000000000 in ?? ()
  32. Thread 3 (Thread 1126189408 (LWP 4556)):
  33. #0  0x000000302af8f1a5 in __nanosleep_nocancel () from /lib64/tls/libc.so.6
  34. #1  0x000000302af8f010 in sleep () from /lib64/tls/libc.so.6
  35. #2  0x000000000044c972 in Business_config_manager::run ()
  36. #3  0x0000000000457b83 in Thread::run_thread ()
  37. #4  0x000000302b80610a in start_thread () from /lib64/tls/libpthread.so.0
  38. #5  0x000000302afc6003 in clone () from /lib64/tls/libc.so.6
  39. #6  0x0000000000000000 in ?? ()
  40. Thread 2 (Thread 1136679264 (LWP 4557)):
  41. #0  0x000000302af8f1a5 in __nanosleep_nocancel () from /lib64/tls/libc.so.6
  42. #1  0x000000302af8f010 in sleep () from /lib64/tls/libc.so.6
  43. #2  0x00000000004524bb in Process_thread::sleep_period ()
  44. #3  0x0000000000452641 in Process_thread::run ()
  45. #4  0x0000000000457b83 in Thread::run_thread ()
  46. #5  0x000000302b80610a in start_thread () from /lib64/tls/libpthread.so.0
  47. #6  0x000000302afc6003 in clone () from /lib64/tls/libc.so.6
  48. #7  0x0000000000000000 in ?? ()
  49. Thread 1 (Thread 182894129792 (LWP 4551)):
  50. #0  0x000000302af8f1a5 in __nanosleep_nocancel () from /lib64/tls/libc.so.6
  51. #1  0x000000302af8f010 in sleep () from /lib64/tls/libc.so.6
  52. #2  0x0000000000420d79 in Ad_preprocess::run ()
  53. #3  0x0000000000450ad0 in main ()