https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66842
Bin Fan <bin.x.fan at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|c |c++
--- Comment #4 from Bin Fan <bin.x.fan at oracle dot com> ---
Since I don't see any response from C so far, I change the example to C++ code,
and change the category to c++. Could C++ folks take a look?
-bash-4.2$ cat c++11_locked_atomics.cpp
#include <atomic>
using namespace std;
#ifndef SIZE
#define SIZE 1024
#endif
typedef struct {
char a[SIZE];
} lock_obj_t;
extern "C" {
extern void display_nlocks ();
}
int main()
{
lock_obj_t v2 = {0};
atomic<lock_obj_t> v1 = ATOMIC_VAR_INIT(v2);
v2 = atomic_load (&v1);
display_nlocks ();
return 0;
}
gcc -shared -ldl -fPIC libmythread.c -o libmythread.so -g
g++ -std=c++11 -latomic c++11_locked_atomics.cpp -DSIZE=2048 -g -L./
-Wl,-rpath=./ -lmythread
+ LD_PRELOAD=./libmythread.so
+ a.out
pthread_mutex_lock is called 32 times
The g++ version is still 4.9.2.
