diff options
| author | deischen <deischen@FreeBSD.org> | 2003-11-04 19:49:56 +0000 |
|---|---|---|
| committer | deischen <deischen@FreeBSD.org> | 2003-11-04 19:49:56 +0000 |
| commit | 96918b9811a81aec1bc2aaee34a0db88044994ee (patch) | |
| tree | a33d6c63283c302eaad019257473e23862fdb6d0 /lib/libc/stdlib | |
| parent | 07928289515debef8667077b7faedd939af2a8f0 (diff) | |
| download | FreeBSD-src-96918b9811a81aec1bc2aaee34a0db88044994ee.zip FreeBSD-src-96918b9811a81aec1bc2aaee34a0db88044994ee.tar.gz | |
Externalize malloc's spinlock so that a thread library can take
it around an application's fork() call. Our new thread libraries
(libthr, libpthread) can now have threads running while another
thread calls fork(). In this case, it is possible for malloc
to be left in an inconsistent state in the child. Our thread
libraries, libpthread in particular, need to use malloc internally
after a fork (in the child).
Reviewed by: davidxu
Diffstat (limited to 'lib/libc/stdlib')
| -rw-r--r-- | lib/libc/stdlib/malloc.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/libc/stdlib/malloc.c b/lib/libc/stdlib/malloc.c index 7006df2..d99457a 100644 --- a/lib/libc/stdlib/malloc.c +++ b/lib/libc/stdlib/malloc.c @@ -74,6 +74,7 @@ __FBSDID("$FreeBSD$"); # include "libc_private.h" # include "spinlock.h" static spinlock_t thread_lock = _SPINLOCK_INITIALIZER; + spinlock_t *__malloc_lock = &thread_lock; # define _MALLOC_LOCK() if (__isthreaded) _SPINLOCK(&thread_lock); # define _MALLOC_UNLOCK() if (__isthreaded) _SPINUNLOCK(&thread_lock); #endif /* __FreeBSD__ */ |
