I have a multi-threaded process that got stuck while running under Linux. But I don't have multi-threaded version to pstack (made alias with gstack). As such, gstack <pid> does not provide me anything. How can I (a) attach gdb to an already running process (b) get stack trace of individual threads (c) know threadids of a running process (d) from threadid (if known) how can I see the stack trace / call stack for a running thread under stuck process?
how to see stack trace for a particular thread within a hanged process in Linux
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At first, compile it with options
-O0 -ggdbfor best debugging.If you can run in under gdb, just run
And just wait problem. When process get stuck, just press
^Cand you in.If you can't run under gdb, just:
At both cases, type
info threadsand you will see all your threads. Then select one and you can seebtor anything else.