ming <[email protected]> added the comment:
I was using cffi callback to call my python function from my c library; it
works
fine when they are all in one thread, but it crashes when my c library create a
new thread and do the "callback" in new thread.
The error sometime is "Segmentfalut 11", sometimes is "bus error"
Pypy version: pypy-2.0-beta2
CPython works fine in my test program.
You can see the code crashes Pypy in the attached file. The C code is like this:
#include <stdio.h>
int (*global_thread_callback)();
#include <pthread.h>
void *another_thread(void *arg)
{
printf("this is another thread\n");
global_thread_callback();
return NULL;
}
void register_thread_callback(int (*func)())
{
global_thread_callback = func;
pthread_t tid;
pthread_create(&tid, NULL, another_thread, NULL);
}
The Python code is like this:
from cffi import FFI
ffi = FFI()
ffi.cdef("""
void register_thread_callback(int (*func)());
""")
lib = ffi.dlopen("libtest.dylib")
# crashes here
def test_thread_callback():
print 'thread call back OK'
return 0
thread_func = ffi.callback("int()", test_thread_callback)
lib.register_thread_callback(thread_func)
while True:
pass
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PyPy bug tracker <[email protected]>
<https://bugs.pypy.org/issue1465>
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