X-Git-Url: http://nsz.repo.hu/git/?p=musl;a=blobdiff_plain;f=src%2Fthread%2Fpthread_create.c;h=cdf36ff249063bbd6b053ec7247afae3adf29e13;hp=d829fa26950c30d841cd7f3a946c6feda997d09b;hb=66def4e776a0c6d68559309aa043163f77b148a5;hpb=5fcebcde6aeba6ae4a339790beba5331fbcd3b6e

diff --git a/src/thread/pthread_create.c b/src/thread/pthread_create.c
index d829fa26..cdf36ff2 100644
--- a/src/thread/pthread_create.c
+++ b/src/thread/pthread_create.c
@@ -1,29 +1,27 @@
 #include "pthread_impl.h"
 
+static void dummy_1(pthread_t self)
+{
+}
+weak_alias(dummy_1, __pthread_tsd_run_dtors);
+weak_alias(dummy_1, __sigtimer_handler);
+
+#ifdef __pthread_unwind_next
+#undef __pthread_unwind_next
+#define __pthread_unwind_next __pthread_unwind_next_3
+#endif
+
 void __pthread_unwind_next(struct __ptcb *cb)
 {
-	int i, j, not_finished;
 	pthread_t self;
 
 	if (cb->__next) longjmp((void *)cb->__next->__jb, 1);
 
 	self = pthread_self();
-	if (self->cancel) self->result = PTHREAD_CANCELLED;
 
 	LOCK(&self->exitlock);
 
-	not_finished = self->tsd_used;
-	for (j=0; not_finished && j<PTHREAD_DESTRUCTOR_ITERATIONS; j++) {
-		not_finished = 0;
-		for (i=0; i<PTHREAD_KEYS_MAX; i++) {
-			if (self->tsd[i] && libc.tsd_keys[i]) {
-				void *tmp = self->tsd[i];
-				self->tsd[i] = 0;
-				libc.tsd_keys[i](tmp);
-				not_finished = 1;
-			}
-		}
-	}
+	__pthread_tsd_run_dtors(self);
 
 	/* Mark this thread dead before decrementing count */
 	self->dead = 1;
@@ -32,35 +30,36 @@ void __pthread_unwind_next(struct __ptcb *cb)
 		exit(0);
 
 	if (self->detached && self->map_base) {
-		syscall4(__NR_rt_sigprocmask, SIG_BLOCK, (long)(uint64_t[1]){-1},0,8);
+		syscall(__NR_rt_sigprocmask, SIG_BLOCK, (long)(uint64_t[1]){-1},0,8);
 		__unmapself(self->map_base, self->map_size);
 	}
 
-	__syscall_exit(0);
+	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 (si->si_code > 0 || si->si_pid != self->pid) return;
-	self->cancel = 1;
-	if (self->canceldisable || (!self->cancelasync && !self->cancelpoint))
-		return;
-	docancel(self);
+	if (si->si_code == SI_TIMER) __sigtimer_handler(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->canceldisable) return;
-	self->cancelpoint = x;
-	if (self->cancel) docancel(self);
+	if ((self->cancelpoint+=x)==1 && x>=0 && self->cancel)
+		docancel(self);
 }
 
 /* "rsyscall" is a mechanism by which a thread can synchronously force all
@@ -81,17 +80,16 @@ static void rsyscall_handler(int sig, siginfo_t *si, void *ctx)
 {
 	struct pthread *self = __pthread_self();
 
-	if (si->si_code > 0 || si->si_pid != self->pid ||
-		rs.cnt == libc.threads_minus_1) return;
+	if (!rs.hold || rs.cnt == libc.threads_minus_1) return;
 
 	/* Threads which have already decremented themselves from the
 	 * thread count must not increment rs.cnt or otherwise act. */
 	if (self->dead) {
-		__wait(&rs.hold, 0, 1, 1);
+		sigfillset(&((ucontext_t *)ctx)->uc_sigmask);
 		return;
 	}
 
-	if (syscall6(rs.nr, rs.arg[0], rs.arg[1], rs.arg[2],
+	if (syscall(rs.nr, rs.arg[0], rs.arg[1], rs.arg[2],
 		rs.arg[3], rs.arg[4], rs.arg[5]) < 0 && !rs.err) rs.err=errno;
 
 	a_inc(&rs.cnt);
@@ -119,9 +117,9 @@ static int rsyscall(int nr, long a, long b, long c, long d, long e, long f)
 	rs.arg[0] = a; rs.arg[1] = b;
 	rs.arg[2] = c; rs.arg[3] = d;
 	rs.arg[4] = d; rs.arg[5] = f;
-	rs.hold = 1;
 	rs.err = 0;
 	rs.cnt = 0;
+	rs.hold = 1;
 
 	/* Dispatch signals until all threads respond */
 	for (i=libc.threads_minus_1; i; i--)
@@ -140,7 +138,7 @@ static int rsyscall(int nr, long a, long b, long c, long d, long e, long f)
 	while((i=rs.cnt)) __wait(&rs.cnt, 0, i, 1);
 
 	if (rs.err) errno = rs.err, ret = -1;
-	else ret = syscall6(nr, a, b, c, d, e, f);
+	else ret = syscall(nr, a, b, c, d, e, f);
 
 	UNLOCK(&rs.lock);
 	return ret;
@@ -150,20 +148,32 @@ static void init_threads()
 {
 	struct sigaction sa = { .sa_flags = SA_SIGINFO | SA_RESTART };
 	libc.lock = __lock;
+	libc.lockfile = __lockfile;
 	libc.cancelpt = cancelpt;
 	libc.rsyscall = rsyscall;
+
+	sigfillset(&sa.sa_mask);
+	sa.sa_sigaction = rsyscall_handler;
+	__libc_sigaction(SIGSYSCALL, &sa, 0);
+
+	sigemptyset(&sa.sa_mask);
 	sa.sa_sigaction = cancel_handler;
 	__libc_sigaction(SIGCANCEL, &sa, 0);
+
 	sigaddset(&sa.sa_mask, SIGSYSCALL);
 	sigaddset(&sa.sa_mask, SIGCANCEL);
-	sa.sa_sigaction = rsyscall_handler;
-	__libc_sigaction(SIGSYSCALL, &sa, 0);
-	sigprocmask(SIG_UNBLOCK, &sa.sa_mask, 0);
+	__libc_sigprocmask(SIG_UNBLOCK, &sa.sa_mask, 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);
+	}
 	pthread_exit(self->start(self->start_arg));
 	return 0;
 }
@@ -194,7 +204,7 @@ int pthread_create(pthread_t *res, const pthread_attr_t *attr, void *(*entry)(vo
 	size += __pthread_tsd_size;
 	map = mmap(0, size, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON, -1, 0);
 	if (!map) return EAGAIN;
-	mprotect(map, guard, PROT_NONE);
+	if (guard) mprotect(map, guard, PROT_NONE);
 
 	tsd = map + size - __pthread_tsd_size;
 	new = (void *)(tsd - sizeof *new - PAGE_SIZE%sizeof *new);
@@ -208,6 +218,8 @@ int pthread_create(pthread_t *res, const pthread_attr_t *attr, void *(*entry)(vo
 	new->tsd = (void *)tsd;
 	new->detached = attr->_a_detach;
 	new->attr = *attr;
+	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);