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Version: latest

deadlock

Use uprobe to trace pthread_mutex_lock and pthread_mutex_unlock in libc.so and detect potential deadlocks.

Getting started​

Running the gadget:

$ kubectl gadget run ghcr.io/inspektor-gadget/gadget/deadlock:latest [flags]

Flags​

No flags.

Guide​

To generate mutex lock/unlock events, you can run a test program in another container.

For this example, we use a test C++ program (from BCC) with lock inversions that can cause a potential deadlock.

The deadlock gadget can trace all mutex lock/unlock events in the following way:

$ sudo ig run ghcr.io/inspektor-gadget/gadget/deadlock:latest
RUNTIME.CONTAINERNAME      COMM                  PID        TID MUTEX_ADDR        OPERATION
hungry_turing              test                23148      23148 0x7FED1243EA58    lock
hungry_turing              test                23148      23148 0x7FED1243EA58    unlock
hungry_turing              test                23148      23237 0x5612ABB33160    lock
hungry_turing              test                23148      23237 0x5612ABB331A0    lock
hungry_turing              test                23148      23237 0x5612ABB331A0    unlock
hungry_turing              test                23148      23237 0x5612ABB33160    unlock
hungry_turing              test                23148      23148 0x7FED1243EA58    lock
hungry_turing              test                23148      23148 0x7FED1243EA58    unlock
hungry_turing              test                23148      23239 0x5612ABB331A0    lock
hungry_turing              test                23148      23239 0x5612ABB331E0    lock
hungry_turing              test                23148      23239 0x5612ABB331E0    unlock
hungry_turing              test                23148      23239 0x5612ABB331A0    unlock
hungry_turing              test                23148      23148 0x7FED1243EA58    lock
hungry_turing              test                23148      23148 0x7FED1243EA58    unlock
hungry_turing              test                23148      23240 0x5612ABB331E0    lock
hungry_turing              test                23148      23240 0x7FFDC68BEB80    lock
hungry_turing              test                23148      23240 0x7FFDC68BEB80    unlock
hungry_turing              test                23148      23240 0x5612ABB331E0    unlock
hungry_turing              test                23148      23148 0x7FED1243EA58    lock
hungry_turing              test                23148      23148 0x7FED1243EA58    unlock
hungry_turing              test                23148      23241 0x7FFDC68BEB80    lock
hungry_turing              test                23148      23241 0x5612ABB33160    lock
hungry_turing              test                23148      23241 0x5612ABB33160    unlock
hungry_turing              test                23148      23241 0x7FFDC68BEB80    unlock
hungry_turing              test                23148      23148 0x7FED1243EA08    lock
hungry_turing              test                23148      23148 0x7FED1243EA08    unlock