The following might override the HTM lock elision. Can someone try it
to see if it works?
bergner@ampere:~$ cat pthread_mutex_lock.c
#include <pthread.h>
#define PTHREAD_MUTEX_NO_ELISION_NP 512
extern int __pthread_mutex_lock (pthread_mutex_t *);
int
pthread_mutex_lock (pthread_mutex_t *mutex)
{
mutex->__data.__kind |= PTHREAD_MUTEX_NO_ELISION_NP;
return __pthread_mutex_lock (mutex);
}
bergner@ampere:~$ gcc -c -fPIC pthread_mutex_lock.c
bergner@ampere:~$ gcc -shared -Wl,-soname,libfoo.so.1 -o libfoo.so.1
pthread_mutex_lock.o
bergner@ampere:~$ LD_PRELOAD=./libfoo.so.1 ./a.out
...replacing ./a.out with the binary you want to run without lock
elision.
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https://bugs.launchpad.net/bugs/1640518
Title:
MongoDB Memory corruption
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