Merge pull request #18720 from mjstapp/compile_wnoreturn

*: enable the missing-noreturn compiler warning

babeld/babel_main.c

@@ -34,9 +34,9 @@ Copyright 2011 by Matthieu Boutier and Juliusz Chroboczek
 #include "babel_zebra.h"
 #include "babel_errors.h"
 
-static void babel_fail(void);
+static FRR_NORETURN void babel_fail(void);
 static void babel_init_random(void);
-static void babel_exit_properly(void);
+static FRR_NORETURN void babel_exit_properly(void);
 static void babel_save_state_file(void);
 
 
@@ -85,8 +85,7 @@ struct zebra_privs_t babeld_privs =
     .cap_num_i = 0
 };
 
-static void
-babel_sigexit(void)
+static FRR_NORETURN void babel_sigexit(void)
 {
     zlog_notice("Terminating on signal");
 
@@ -208,8 +207,7 @@ main(int argc, char **argv)
     return 0;
 }
 
-static void
-babel_fail(void)
+static FRR_NORETURN void babel_fail(void)
 {
     exit(1);
 }
@@ -297,8 +295,7 @@ fini:
     return ;
 }
 
-static void
-babel_exit_properly(void)
+static FRR_NORETURN void babel_exit_properly(void)
 {
     debugf(BABEL_DEBUG_COMMON, "Exiting...");
     usleep(roughly(10000));

bfdd/bfdd.c

@@ -57,7 +57,7 @@ static void sigusr1_handler(void)
 	zlog_rotate();
 }
 
-static void sigterm_handler(void)
+static FRR_NORETURN void sigterm_handler(void)
 {
 	bglobal.bg_shutdown = true;
 

configure.ac

@@ -468,9 +468,9 @@ AC_C_FLAG([-Wwrite-strings])
 AC_C_FLAG([-Wundef])
 AC_C_FLAG([-Wimplicit-fallthrough])
 AC_C_FLAG([-Wshadow])
+AC_C_FLAG([-Wmissing-noreturn])
 if test "$enable_gcc_ultra_verbose" = "yes" ; then
   AC_C_FLAG([-Wcast-qual])
-  AC_C_FLAG([-Wmissing-noreturn])
   AC_C_FLAG([-Wmissing-format-attribute])
   AC_C_FLAG([-Wunreachable-code])
   AC_C_FLAG([-Wpacked])

eigrpd/eigrp_main.c

@@ -92,7 +92,7 @@ static void sighup(void)
 }
 
 /* SIGINT / SIGTERM handler. */
-static void sigint(void)
+static FRR_NORETURN void sigint(void)
 {
 	zlog_notice("Terminating on signal");
 

ldpd/lde.c

@@ -176,8 +176,7 @@ lde_init(struct ldpd_init *init)
 	zclient_sync_init();
 }
 
-static void
-lde_shutdown(void)
+static FRR_NORETURN void lde_shutdown(void)
 {
 	/* close pipes */
 	if (iev_ldpe) {

ldpd/ldpd.c

@@ -443,8 +443,7 @@ main(int argc, char *argv[])
 	return (0);
 }
 
-static void
-ldpd_shutdown(void)
+static FRR_NORETURN void ldpd_shutdown(void)
 {
 	pid_t		 pid;
 	int		 status;

ldpd/ldpe.c

@@ -25,7 +25,7 @@
 #include "libfrr.h"
 #include "zlog_live.h"
 
-static void	 ldpe_shutdown(void);
+static FRR_NORETURN void ldpe_shutdown(void);
 static void ldpe_dispatch_main(struct event *thread);
 static void ldpe_dispatch_lde(struct event *thread);
 #ifdef __OpenBSD__
@@ -66,8 +66,7 @@ struct zebra_privs_t ldpe_privs =
 };
 
 /* SIGINT / SIGTERM handler. */
-static void
-sigint(void)
+static FRR_NORETURN void sigint(void)
 {
 	ldpe_shutdown();
 }
@@ -182,8 +181,7 @@ ldpe_init(struct ldpd_init *init)
 	accept_init();
 }
 
-static void
-ldpe_shutdown(void)
+static FRR_NORETURN void ldpe_shutdown(void)
 {
 	struct if_addr		*if_addr;
 	struct adj		*adj;

lib/command_lex.l

@@ -18,6 +18,7 @@
 /* ignore harmless bugs in old versions of flex */
 #pragma GCC diagnostic ignored "-Wsign-compare"
 #pragma GCC diagnostic ignored "-Wmissing-prototypes"
+#pragma GCC diagnostic ignored "-Wmissing-noreturn"
 
 #include "lib/command_parse.h"
 

lib/compiler.h

@@ -461,6 +461,9 @@ _Static_assert(sizeof(_uint64_t) == 8 && sizeof(_int64_t) == 8,
 #define _DATA_SECTION(name) __attribute__((section(".data." name)))
 #endif
 
+/* Wrapper for the 'noreturn' metadata */
+#define FRR_NORETURN __attribute__((noreturn))
+
 #ifdef __cplusplus
 }
 #endif

lib/defun_lex.l

@@ -29,6 +29,7 @@
 /* ignore harmless bugs in old versions of flex */
 #pragma GCC diagnostic ignored "-Wsign-compare"
 #pragma GCC diagnostic ignored "-Wunused-value"
+#pragma GCC diagnostic ignored "-Wmissing-noreturn"
 
 #include "config.h"
 #include <Python.h>

lib/libfrr.c

@@ -868,7 +868,7 @@ static void rcv_signal(int signum)
 	/* poll() is interrupted by the signal; handled below */
 }
 
-static void frr_daemon_wait(int fd)
+static FRR_NORETURN void frr_daemon_wait(int fd)
 {
 	struct pollfd pfd[1];
 	int ret;

lib/memory.h

@@ -183,8 +183,7 @@ typedef int qmem_walk_fn(void *arg, struct memgroup *mg, struct memtype *mt);
 extern int qmem_walk(qmem_walk_fn *func, void *arg);
 extern int log_memstats(const char *daemon_name, bool enabled);
 
-extern __attribute__((__noreturn__)) void memory_oom(size_t size,
-						     const char *name);
+extern FRR_NORETURN void memory_oom(size_t size, const char *name);
 
 #ifdef __cplusplus
 }

lib/sigevent.c

@@ -206,8 +206,8 @@ static void *program_counter(void *context)
 	return NULL;
 }
 
-static void __attribute__((noreturn))
-exit_handler(int signo, siginfo_t *siginfo, void *context)
+static void FRR_NORETURN exit_handler(int signo, siginfo_t *siginfo,
+				      void *context)
 {
 	void *pc = program_counter(context);
 
@@ -215,8 +215,8 @@ exit_handler(int signo, siginfo_t *siginfo, void *context)
 	_exit(128 + signo);
 }
 
-static void __attribute__((noreturn))
-core_handler(int signo, siginfo_t *siginfo, void *context)
+static void FRR_NORETURN core_handler(int signo, siginfo_t *siginfo,
+				      void *context)
 {
 	void *pc = program_counter(context);
 

mgmtd/mgmt_fe_adapter.c

@@ -2030,7 +2030,7 @@ void mgmt_fe_adapter_init(struct event_loop *tm)
 	}
 }
 
-static void mgmt_fe_abort_if_session(void *data)
+static FRR_NORETURN void mgmt_fe_abort_if_session(void *data)
 {
 	struct mgmt_fe_session_ctx *session = data;
 

nhrpd/nhrp_main.c

@@ -78,7 +78,7 @@ static void nhrp_sigusr1(void)
 	zlog_rotate();
 }
 
-static void nhrp_request_stop(void)
+static FRR_NORETURN void nhrp_request_stop(void)
 {
 	debugf(NHRP_DEBUG_COMMON, "Exiting...");
 	frr_early_fini();

ospf6d/ospf6_main.c

@@ -125,14 +125,14 @@ static void sighup(void)
 }
 
 /* SIGINT handler. */
-static void sigint(void)
+static FRR_NORETURN void sigint(void)
 {
 	zlog_notice("Terminating on signal SIGINT");
 	ospf6_exit(0);
 }
 
 /* SIGTERM handler. */
-static void sigterm(void)
+static FRR_NORETURN void sigterm(void)
 {
 	zlog_notice("Terminating on signal SIGTERM");
 	ospf6_exit(0);

ospfd/ospf_main.c

@@ -99,7 +99,7 @@ static void sighup(void)
 }
 
 /* SIGINT / SIGTERM handler. */
-static void sigint(void)
+static FRR_NORETURN void sigint(void)
 {
 	zlog_notice("Terminating on signal");
 	bfd_protocol_integration_set_shutdown(true);

pathd/path_main.c

@@ -55,7 +55,7 @@ static void sighup(void)
 }
 
 /* SIGINT / SIGTERM handler. */
-static void sigint(void)
+static FRR_NORETURN void sigint(void)
 {
 	zlog_notice("Terminating on signal");
 	zlog_notice("Unregister from opaque,etc ");

pbrd/pbr_main.c

@@ -65,7 +65,7 @@ static void sighup(void)
 }
 
 /* SIGINT / SIGTERM handler. */
-static void sigint(void)
+static FRR_NORETURN void sigint(void)
 {
 	zlog_notice("Terminating on signal");
 

pimd/pim6_main.c

@@ -56,14 +56,14 @@ static void pim6_sighup(void)
 	zlog_info("SIGHUP received, ignoring");
 }
 
-static void pim6_sigint(void)
+static FRR_NORETURN void pim6_sigint(void)
 {
 	zlog_notice("Terminating on signal SIGINT");
 	pim6_terminate();
 	exit(1);
 }
 
-static void pim6_sigterm(void)
+static FRR_NORETURN void pim6_sigterm(void)
 {
 	zlog_notice("Terminating on signal SIGTERM");
 	pim6_terminate();

pimd/pim_signals.c

@@ -25,14 +25,14 @@ static void pim_sighup(void)
 	zlog_info("SIGHUP received, ignoring");
 }
 
-static void pim_sigint(void)
+static FRR_NORETURN void pim_sigint(void)
 {
 	zlog_notice("Terminating on signal SIGINT");
 	pim_terminate();
 	exit(1);
 }
 
-static void pim_sigterm(void)
+static FRR_NORETURN void pim_sigterm(void)
 {
 	zlog_notice("Terminating on signal SIGTERM");
 	pim_terminate();

ripd/rip_main.c

@@ -69,7 +69,7 @@ static void sighup(void)
 }
 
 /* SIGINT handler. */
-static void sigint(void)
+static FRR_NORETURN void sigint(void)
 {
 	struct vrf *vrf;
 

ripngd/ripng_main.c

@@ -67,7 +67,7 @@ static void sighup(void)
 }
 
 /* SIGINT handler. */
-static void sigint(void)
+static FRR_NORETURN void sigint(void)
 {
 	struct vrf *vrf;
 

sharpd/sharp_main.c

@@ -90,7 +90,7 @@ static void sighup(void)
 }
 
 /* SIGINT / SIGTERM handler. */
-static void sigint(void)
+static FRR_NORETURN void sigint(void)
 {
 	zlog_notice("Terminating on signal");
 

staticd/static_main.c

@@ -65,7 +65,7 @@ static void sighup(void)
 }
 
 /* SIGINT / SIGTERM handler. */
-static void sigint(void)
+static FRR_NORETURN void sigint(void)
 {
 	zlog_notice("Terminating on signal");
 

vtysh/vtysh_main.c

@@ -156,7 +156,7 @@ static void vtysh_signal_init(void)
 }
 
 /* Help information display. */
-static void usage(int status)
+static FRR_NORETURN void usage(int status)
 {
 	if (status != 0)
 		fprintf(stderr, "Try `%s --help' for more information.\n",

watchfrr/watchfrr.c

@@ -1090,7 +1090,7 @@ void watchfrr_status(struct vty *vty)
 	}
 }
 
-static void sigint(void)
+static FRR_NORETURN void sigint(void)
 {
 	zlog_notice("Terminating on signal");
 	systemd_send_stopping();
@@ -1268,7 +1268,7 @@ static void netns_setup(const char *nsname)
 
 #else /* !GNU_LINUX */
 
-static void netns_setup(const char *nsname)
+static FRR_NORETURN void netns_setup(const char *nsname)
 {
 	fprintf(stderr, "network namespaces are only available on Linux\n");
 	exit(1);