Comment 21 for bug 1640518

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.