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termux-packages/root-packages/libfuse2/lib-fuse_loop_mt.c.patch
Tee KOBAYASHI bf556291eb libfuse2: Use negative logic for pthread cancelation
to avoid race condition.
2022-12-13 13:23:21 +00:00

47 lines
1.2 KiB
Diff

--- a/lib/fuse_loop_mt.c
+++ b/lib/fuse_loop_mt.c
@@ -19,6 +19,7 @@
#include <semaphore.h>
#include <errno.h>
#include <sys/time.h>
+#include <stdatomic.h>
/* Environment var controlling the thread stack size */
#define ENVNAME_THREAD_STACK "FUSE_THREAD_STACK"
@@ -30,6 +31,7 @@ struct fuse_worker {
size_t bufsize;
char *buf;
struct fuse_mt *mt;
+ atomic_flag cancel;
};
struct fuse_mt {
@@ -77,9 +79,8 @@ static void *fuse_do_work(void *data)
};
int res;
- pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
+ if (!atomic_flag_test_and_set(&w->cancel)) pthread_exit(NULL);
res = fuse_session_receive_buf(mt->se, &fbuf, &ch);
- pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);
if (res == -EINTR)
continue;
if (res <= 0) {
@@ -193,6 +194,7 @@ static int fuse_loop_start_thread(struct
return -1;
}
+ atomic_flag_test_and_set(&w->cancel);
res = fuse_start_thread(&w->thread_id, fuse_do_work, w);
if (res == -1) {
free(w->buf);
@@ -243,7 +245,7 @@ int fuse_session_loop_mt(struct fuse_ses
pthread_mutex_lock(&mt.lock);
for (w = mt.main.next; w != &mt.main; w = w->next)
- pthread_cancel(w->thread_id);
+ atomic_flag_clear(&w->cancel);
mt.exit = 1;
pthread_mutex_unlock(&mt.lock);