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Diffstat (limited to 'src/thread/pthread_create.c')
-rw-r--r--src/thread/pthread_create.c48
1 files changed, 13 insertions, 35 deletions
diff --git a/src/thread/pthread_create.c b/src/thread/pthread_create.c
index a722a2d6..844d7bf9 100644
--- a/src/thread/pthread_create.c
+++ b/src/thread/pthread_create.c
@@ -19,6 +19,7 @@ weak_alias(dummy_1, __pthread_tsd_run_dtors);
void __pthread_unwind_next(struct __ptcb *cb)
{
pthread_t self;
+ int n;
if (cb->__next) longjmp((void *)cb->__next->__jb, 1);
@@ -31,8 +32,9 @@ void __pthread_unwind_next(struct __ptcb *cb)
/* Mark this thread dead before decrementing count */
self->dead = 1;
- if (!a_fetch_add(&libc.threads_minus_1, -1))
- exit(0);
+ do n = libc.threads_minus_1;
+ while (n && a_cas(&libc.threads_minus_1, n, n-1)!=n);
+ if (!n) exit(0);
if (self->detached && self->map_base) {
__syscall(SYS_rt_sigprocmask, SIG_BLOCK, (long)(uint64_t[1]){-1},0,8);
@@ -42,43 +44,16 @@ void __pthread_unwind_next(struct __ptcb *cb)
__syscall(SYS_exit, 0);
}
-static void docancel(struct pthread *self)
-{
- struct __ptcb cb = { .__next = self->cancelbuf };
- self->canceldisable = 1;
- self->cancelasync = 0;
- __pthread_unwind_next(&cb);
-}
-
-static void cancel_handler(int sig, siginfo_t *si, void *ctx)
-{
- struct pthread *self = __pthread_self();
- if (self->cancel && !self->canceldisable &&
- (self->cancelasync || (self->cancelpoint==1 && PC_AT_SYS(ctx))))
- docancel(self);
-}
-
-static void cancelpt(int x)
-{
- struct pthread *self = __pthread_self();
- if ((self->cancelpoint+=x)==1 && self->cancel
- && x<2U && !self->canceldisable) docancel(self);
-}
-
static void init_threads()
{
- struct sigaction sa = { .sa_flags = SA_SIGINFO | SA_RESTART };
+ sigset_t set;
libc.lock = __lock;
libc.lockfile = __lockfile;
- libc.cancelpt = cancelpt;
-
- sigemptyset(&sa.sa_mask);
- sa.sa_sigaction = cancel_handler;
- __libc_sigaction(SIGCANCEL, &sa, 0);
- sigaddset(&sa.sa_mask, SIGSYSCALL);
- sigaddset(&sa.sa_mask, SIGCANCEL);
- __libc_sigprocmask(SIG_UNBLOCK, &sa.sa_mask, 0);
+ sigemptyset(&set);
+ sigaddset(&set, SIGSYSCALL);
+ sigaddset(&set, SIGCANCEL);
+ __libc_sigprocmask(SIG_UNBLOCK, &set, 0);
}
static int start(void *p)
@@ -159,6 +134,9 @@ int pthread_create(pthread_t *res, const pthread_attr_t *attr, void *(*entry)(vo
void pthread_exit(void *result)
{
struct pthread *self = pthread_self();
+ struct __ptcb cb = { .__next = self->cancelbuf };
self->result = result;
- docancel(self);
+ self->canceldisable = 1;
+ self->cancelasync = 0;
+ __pthread_unwind_next(&cb);
}