c80ffece02
Previously, arc4random would register a fork-detecting pthread_atfork handler to not have to call getpid() after a fork. pthread_atfork uses pthread_mutex_lock, which requires the current thread to be initialized, preventing the use of arc4random for initializing the global stack guard, which needs to happen before the main thread has been initialized. Extract the arc4random fork-detection flag and use the existing arc4random fork handler to set it. Bug: http://b/29622562 Change-Id: I98c9329fa0e489c3f78cad52747eaaf2f5226b80
57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
/* $OpenBSD: thread_private.h,v 1.18 2006/02/22 07:16:31 otto Exp $ */
|
|
|
|
/* PUBLIC DOMAIN: No Rights Reserved. Marco S Hyman <marc@snafu.org> */
|
|
|
|
#ifndef _THREAD_PRIVATE_H_
|
|
#define _THREAD_PRIVATE_H_
|
|
|
|
#include <pthread.h>
|
|
|
|
__BEGIN_DECLS
|
|
|
|
/*
|
|
* This file defines the thread library interface to libc. Thread
|
|
* libraries must implement the functions described here for proper
|
|
* inter-operation with libc. libc contains weak versions of the
|
|
* described functions for operation in a non-threaded environment.
|
|
*/
|
|
|
|
/*
|
|
* helper macro to make unique names in the thread namespace
|
|
*/
|
|
#define __THREAD_NAME(name) __CONCAT(_thread_tagname_,name)
|
|
|
|
struct __thread_private_tag_t {
|
|
pthread_mutex_t _private_lock;
|
|
pthread_key_t _private_key;
|
|
};
|
|
|
|
#define _THREAD_PRIVATE_MUTEX(name) \
|
|
static struct __thread_private_tag_t __THREAD_NAME(name) = { PTHREAD_MUTEX_INITIALIZER, -1 }
|
|
#define _THREAD_PRIVATE_MUTEX_LOCK(name) \
|
|
pthread_mutex_lock( &__THREAD_NAME(name)._private_lock )
|
|
#define _THREAD_PRIVATE_MUTEX_UNLOCK(name) \
|
|
pthread_mutex_unlock( &__THREAD_NAME(name)._private_lock )
|
|
|
|
/* Note that these aren't compatible with the usual OpenBSD ones which lazy-initialize! */
|
|
#define _MUTEX_LOCK(l) pthread_mutex_lock((pthread_mutex_t*) l)
|
|
#define _MUTEX_UNLOCK(l) pthread_mutex_unlock((pthread_mutex_t*) l)
|
|
|
|
__LIBC_HIDDEN__ void _thread_atexit_lock(void);
|
|
__LIBC_HIDDEN__ void _thread_atexit_unlock(void);
|
|
|
|
#define _ATEXIT_LOCK() _thread_atexit_lock()
|
|
#define _ATEXIT_UNLOCK() _thread_atexit_unlock()
|
|
|
|
__LIBC_HIDDEN__ void _thread_arc4_lock(void);
|
|
__LIBC_HIDDEN__ void _thread_arc4_unlock(void);
|
|
|
|
#define _ARC4_LOCK() _thread_arc4_lock()
|
|
#define _ARC4_UNLOCK() _thread_arc4_unlock()
|
|
#define _ARC4_ATFORK(f) pthread_atfork(NULL, NULL, (f))
|
|
|
|
extern volatile sig_atomic_t _rs_forked;
|
|
|
|
__END_DECLS
|
|
|
|
#endif /* _THREAD_PRIVATE_H_ */
|