| /* { dg-do compile } */ |
| /* { dg-options "-fdiagnostics-path-format=inline-events -fdiagnostics-show-caret -fdiagnostics-show-line-numbers" } */ |
| /* { dg-enable-nn-line-numbers "" } */ |
| |
| extern void acquire_lock_a(void); |
| extern void acquire_lock_b(void); |
| |
| void foo () |
| { |
| acquire_lock_a (); |
| acquire_lock_b (); |
| } |
| |
| void bar () |
| { |
| acquire_lock_b (); |
| acquire_lock_a (); /* { dg-warning "deadlock due to inconsistent lock acquisition order" } */ |
| } |
| |
| /* { dg-begin-multiline-output "" } |
| NN | acquire_lock_a (); |
| | ^~~~~~~~~~~~~~~~~ |
| Thread: 'Thread 1' |
| 'foo': event 1 |
| | |
| | NN | { |
| | | ^ |
| | | | |
| | | (1) entering 'foo' |
| | |
| +--> 'foo': event 2 |
| | |
| | NN | acquire_lock_a (); |
| | | ^~~~~~~~~~~~~~~~~ |
| | | | |
| | | (2) lock a is now held by thread 1 |
| | |
| |
| Thread: 'Thread 2' |
| 'bar': event 3 |
| | |
| | NN | { |
| | | ^ |
| | | | |
| | | (3) entering 'bar' |
| | |
| +--> 'bar': event 4 |
| | |
| | NN | acquire_lock_b (); |
| | | ^~~~~~~~~~~~~~~~~ |
| | | | |
| | | (4) lock b is now held by thread 2 |
| | |
| |
| Thread: 'Thread 1' |
| 'foo': event 5 |
| | |
| | NN | acquire_lock_b (); |
| | | ^~~~~~~~~~~~~~~~~ |
| | | | |
| | | (5) deadlocked due to waiting for lock b in thread 1 (acquired by thread 2 at (4))... |
| | |
| |
| Thread: 'Thread 2' |
| 'bar': event 6 |
| | |
| | NN | acquire_lock_a (); |
| | | ^~~~~~~~~~~~~~~~~ |
| | | | |
| | | (6) ...whilst waiting for lock a in thread 2 (acquired by thread 1 at (2)) |
| | |
| { dg-end-multiline-output "" } */ |
