fix off-by-one bug in siglongjmp that caused unpredictable behavior

[musl] / src / internal / libc.h

diff --git a/src/internal/libc.h b/src/internal/libc.h
index 3f1e55e..929ff97 100644 (file)
--- a/src/internal/libc.h
+++ b/src/internal/libc.h
@@ -7,8 +7,8 @@
 struct __libc {
        int *(*errno_location)(void);
        void (*testcancel)(void);
-       void (*lock)(volatile int *);
-       void (*lockfile)(FILE *);
+       int threaded;
+       int canceldisable;
        void (*fork_handler)(int);
        int (*atexit)(void (*)(void));
        void (*fini)(void);
@@ -16,6 +16,7 @@ struct __libc {
        volatile int threads_minus_1;
        int ofl_lock;
        FILE *ofl_head;
+       void *main_thread;
 };
 
 
@@ -37,11 +38,13 @@ extern struct __libc *__libc_loc(void) __attribute__((const));
 
 /* Designed to avoid any overhead in non-threaded processes */
 void __lock(volatile int *);
-void __lockfile(FILE *);
+int __lockfile(FILE *);
+void __unlockfile(FILE *);
 #define LOCK(x) (libc.threads_minus_1 ? (__lock(x),1) : ((void)(x),1))
-#define UNLOCK(x) (*(x)=0)
+#define UNLOCK(x) (*(volatile int *)(x)=0)
 
-int __rsyscall(int, long, long, long, long, long, long);
+void __synccall(void (*)(void *), void *);
+int __setxid(int, int, int, int);
 
 extern char **__environ;
 #define environ __environ