/* Cancellation handling with integration into exception handling. */
+struct __cancel_jmp_buf_tag
+{
+ __jmp_buf __cancel_jmp_buf;
+ int __mask_was_saved;
+};
+
typedef struct
{
- struct
- {
- __jmp_buf __cancel_jmp_buf;
- int __mask_was_saved;
- } __cancel_jmp_buf[1];
+ struct __cancel_jmp_buf_tag __cancel_jmp_buf[1];
void *__pad[4];
} __pthread_unwind_buf_t __attribute__ ((__aligned__));
__pthread_unwind_buf_t __cancel_buf; \
void (*__cancel_routine) (void *) = (routine); \
void *__cancel_arg = (arg); \
- int __not_first_call = __sigsetjmp ((struct __jmp_buf_tag *) (void *) \
- __cancel_buf.__cancel_jmp_buf, 0); \
+ int __not_first_call = __sigsetjmp_cancel (__cancel_buf.__cancel_jmp_buf, \
+ 0); \
if (__glibc_unlikely (__not_first_call)) \
{ \
__cancel_routine (__cancel_arg); \
__pthread_unwind_buf_t __cancel_buf; \
void (*__cancel_routine) (void *) = (routine); \
void *__cancel_arg = (arg); \
- int __not_first_call = __sigsetjmp ((struct __jmp_buf_tag *) (void *) \
- __cancel_buf.__cancel_jmp_buf, 0); \
+ int __not_first_call = __sigsetjmp_cancel (__cancel_buf.__cancel_jmp_buf, \
+ 0); \
if (__glibc_unlikely (__not_first_call)) \
{ \
__cancel_routine (__cancel_arg); \
;
#endif
-/* Function used in the macros. */
+/* Function used in the macros. Calling __sigsetjmp, with its first
+ argument declared as an array, results in a -Wstringop-overflow
+ warning from GCC 11 because struct pthread_unwind_buf is smaller
+ than jmp_buf. The calls from the macros have __SAVEMASK set to 0,
+ so nothing beyond the common prefix is used and this warning is a
+ false positive. Use an alias with its first argument declared to
+ use the type in the macros if possible to avoid this warning. */
+#if __GNUC_PREREQ (11, 0)
+extern int __REDIRECT_NTHNL (__sigsetjmp_cancel,
+ (struct __cancel_jmp_buf_tag __env[1],
+ int __savemask),
+ __sigsetjmp) __attribute_returns_twice__;
+#else
+# define __sigsetjmp_cancel(env, savemask) \
+ __sigsetjmp ((struct __jmp_buf_tag *) (void *) (env), (savemask))
extern int __sigsetjmp (struct __jmp_buf_tag __env[1],
int __savemask) __THROWNL;
+#endif
/* Mutex handling. */