restorer: Implement own BUG_ON_HANDLER

Due to code specifics (we're running without
glibc support) we need own one.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

include/restorer.h

@@ -311,4 +311,20 @@ static void always_inline rst_mutex_unlock(rst_mutex_t *mutex)
 	sys_futex(mutex, FUTEX_WAKE, 1, NULL, NULL, 0);
 }
 
+/* We need own handler */
+
+#ifdef BUG_ON_HANDLER
+# undef BUG_ON_HANDLER
+#endif
+
+#define BUG_ON_HANDLER(condition)					\
+	do {								\
+		if ((condition)) {					\
+			long tgid = sys_gettid();			\
+			write_hex_n(0x5a5a5a5a);			\
+			write_num_n(__LINE__);				\
+			sys_tgkill(tgid, tgid, SIGABRT);		\
+		}							\
+	} while (0)
+
 #endif /* CR_RESTORER_H__ */

include/syscall-codes.h

@@ -24,6 +24,7 @@
 #define __NR_exit		60
 #define __NR_flock		73
 #define __NR_unlink		87
+#define __NR_tgkill		131
 #define __NR__sysctl		156
 #define __NR_prctl		157
 #define __NR_arch_prctl		158

include/syscall.h

@@ -279,6 +279,11 @@ static void always_inline local_sleep(long seconds)
 	sys_nanosleep(&req, &rem);
 }
 
+static long always_inline sys_tgkill(long tgid, long pid, int sig)
+{
+	return syscall3(__NR_tgkill, tgid, pid, (long)sig);
+}
+
 #else /* CONFIG_X86_64 */
 # error x86-32 bit mode not yet implemented
 #endif /* CONFIG_X86_64 */