Avoid race b/w read/write shm_global_variable#146
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aayushi363 wants to merge 1 commit intomcminickpt:mcmini-with-dmtcpfrom
Open
Avoid race b/w read/write shm_global_variable#146aayushi363 wants to merge 1 commit intomcminickpt:mcmini-with-dmtcpfrom
aayushi363 wants to merge 1 commit intomcminickpt:mcmini-with-dmtcpfrom
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Added a function to write shm_global_variable address which is protected by the mutexes. Another function to read shm_global_variable with a thread local variable to make sure it read only once. This way we avoid the race happening between reading and writing of this shared global variable.
maxwellpirtle
requested changes
Aug 5, 2025
Comment on lines
+34
to
+36
| if (local_shm_start == NULL) { | ||
| local_shm_start = global_shm_start; | ||
| } |
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This needs to be wrapped in a pthread_mutex_lock()/pthread_mutex_unlock(), but otherwise it's good
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When I say this, I meant only line 35 to be precise since local_shm_start is thread_local.
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Added a function to write shm_global_variable address which is protected by the mutexes. Another function to read shm_global_variable with a thread local variable to make sure it read only once. This way we avoid the race happening between reading and writing of this shared global variable.