X-Git-Url: http://nsz.repo.hu/git/?p=musl;a=blobdiff_plain;f=src%2Fthread%2Fpthread_create.c;h=a6afd1e584873825dd4c3e2793b497fddddff236;hp=844d7bf90e397b1f07b4afc4027b23ca9325cb13;hb=730bee725a770b543181424b52203dd1634ab5d1;hpb=feee98903cd8119d9a3db62589246a940f44a9f5

diff --git a/src/thread/pthread_create.c b/src/thread/pthread_create.c
index 844d7bf9..a6afd1e5 100644
--- a/src/thread/pthread_create.c
+++ b/src/thread/pthread_create.c
@@ -1,70 +1,49 @@
 #include "pthread_impl.h"
+#include "stdio_impl.h"
 
 static void dummy_0()
 {
 }
-weak_alias(dummy_0, __rsyscall_lock);
-weak_alias(dummy_0, __rsyscall_unlock);
+weak_alias(dummy_0, __synccall_lock);
+weak_alias(dummy_0, __synccall_unlock);
+weak_alias(dummy_0, __pthread_tsd_run_dtors);
 
-static void dummy_1(pthread_t self)
+void __pthread_do_unwind(struct __ptcb *cb)
 {
-}
-weak_alias(dummy_1, __pthread_tsd_run_dtors);
-
-#ifdef __pthread_unwind_next
-#undef __pthread_unwind_next
-#define __pthread_unwind_next __pthread_unwind_next_3
-#endif
-
-void __pthread_unwind_next(struct __ptcb *cb)
-{
-	pthread_t self;
+	pthread_t self = pthread_self();
 	int n;
 
-	if (cb->__next) longjmp((void *)cb->__next->__jb, 1);
-
-	self = pthread_self();
+	if (cb->__next) {
+		self->cancelbuf = cb->__next->__next;
+		longjmp((void *)cb->__next->__jb, 1);
+	}
 
-	LOCK(&self->exitlock);
+	__pthread_tsd_run_dtors();
 
-	__pthread_tsd_run_dtors(self);
+	__lock(&self->exitlock);
 
 	/* Mark this thread dead before decrementing count */
+	__lock(&self->killlock);
 	self->dead = 1;
+	a_store(&self->killlock, 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);
+		__syscall(SYS_rt_sigprocmask, SIG_BLOCK, (uint64_t[]){-1},0,8);
 		__unmapself(self->map_base, self->map_size);
 	}
 
 	__syscall(SYS_exit, 0);
 }
 
-static void init_threads()
-{
-	sigset_t set;
-	libc.lock = __lock;
-	libc.lockfile = __lockfile;
-
-	sigemptyset(&set);
-	sigaddset(&set, SIGSYSCALL);
-	sigaddset(&set, SIGCANCEL);
-	__libc_sigprocmask(SIG_UNBLOCK, &set, 0);
-}
-
 static int start(void *p)
 {
 	struct pthread *self = p;
-	if (self->unblock_cancel) {
-		sigset_t set;
-		sigemptyset(&set);
-		sigaddset(&set, SIGCANCEL);
-		__libc_sigprocmask(SIG_UNBLOCK, &set, 0);
-	}
+	if (self->unblock_cancel)
+		__syscall(SYS_rt_sigprocmask, SIG_UNBLOCK, SIGPT_SET, 0, 8);
 	pthread_exit(self->start(self->start_arg));
 	return 0;
 }
@@ -77,21 +56,39 @@ int __uniclone(void *, int (*)(), void *);
 static const size_t dummy = 0;
 weak_alias(dummy, __pthread_tsd_size);
 
+static FILE *const dummy_file = 0;
+weak_alias(dummy_file, __stdin_used);
+weak_alias(dummy_file, __stdout_used);
+weak_alias(dummy_file, __stderr_used);
+
+static void init_file_lock(FILE *f)
+{
+	if (f && f->lock<0) f->lock = 0;
+}
+
 int pthread_create(pthread_t *res, const pthread_attr_t *attr, void *(*entry)(void *), void *arg)
 {
-	static int init;
 	int ret;
-	size_t size, guard;
+	size_t size = DEFAULT_STACK_SIZE + DEFAULT_GUARD_SIZE;
+	size_t guard = DEFAULT_GUARD_SIZE;
 	struct pthread *self = pthread_self(), *new;
 	unsigned char *map, *stack, *tsd;
-	const pthread_attr_t default_attr = { 0 };
 
 	if (!self) return ENOSYS;
-	if (!init && ++init) init_threads();
+	if (!libc.threaded) {
+		for (FILE *f=libc.ofl_head; f; f=f->next)
+			init_file_lock(f);
+		init_file_lock(__stdin_used);
+		init_file_lock(__stdout_used);
+		init_file_lock(__stderr_used);
+		__syscall(SYS_rt_sigprocmask, SIG_UNBLOCK, SIGPT_SET, 0, 8);
+		libc.threaded = 1;
+	}
 
-	if (!attr) attr = &default_attr;
-	guard = ROUND(attr->_a_guardsize + DEFAULT_GUARD_SIZE);
-	size = guard + ROUND(attr->_a_stacksize + DEFAULT_STACK_SIZE);
+	if (attr) {
+		guard = ROUND(attr->_a_guardsize + DEFAULT_GUARD_SIZE);
+		size = guard + ROUND(attr->_a_stacksize + DEFAULT_STACK_SIZE);
+	}
 	size += __pthread_tsd_size;
 	map = mmap(0, size, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON, -1, 0);
 	if (!map) return EAGAIN;
@@ -107,20 +104,18 @@ int pthread_create(pthread_t *res, const pthread_attr_t *attr, void *(*entry)(vo
 	new->start_arg = arg;
 	new->self = new;
 	new->tsd = (void *)tsd;
-	new->detached = attr->_a_detach;
-	new->attr = *attr;
+	if (attr) new->detached = attr->_a_detach;
 	new->unblock_cancel = self->cancel;
-	new->result = PTHREAD_CANCELED;
 	memcpy(new->tlsdesc, self->tlsdesc, sizeof new->tlsdesc);
 	new->tlsdesc[1] = (uintptr_t)new;
 	stack = (void *)((uintptr_t)new-1 & ~(uintptr_t)15);
 
-	__rsyscall_lock();
+	__synccall_lock();
 
 	a_inc(&libc.threads_minus_1);
 	ret = __uniclone(stack, start, new);
 
-	__rsyscall_unlock();
+	__synccall_unlock();
 
 	if (ret < 0) {
 		a_dec(&libc.threads_minus_1);
@@ -136,7 +131,5 @@ void pthread_exit(void *result)
 	struct pthread *self = pthread_self();
 	struct __ptcb cb = { .__next = self->cancelbuf };
 	self->result = result;
-	self->canceldisable = 1;
-	self->cancelasync = 0;
 	__pthread_unwind_next(&cb);
 }