Workaround 'value of SIGBUS unknown' cppcheck info messages

* include/private/gcconfig.h [SIGBUS && !CPPCHECK] (HAVE_SIGBUS): New
macro.
* os_dep.c [NEED_FIND_LIMIT || UNIX_LIKE] (old_bus_handler,
GC_set_and_save_fault_handler, GC_reset_fault_handler): Replace
"ifdef SIGBUS" with "ifdef HAVE_SIGBUS".
* pthread_stop_world.c [!GC_OPENBSD_UTHREADS && !NACL]
(GC_remove_allowed_signals): Likewise.

diff --git a/include/private/gcconfig.h b/include/private/gcconfig.h
index c8a25ec..714e5d1 100644 (file)
--- a/include/private/gcconfig.h
+++ b/include/private/gcconfig.h
@@ -2862,6 +2862,10 @@
 # undef MPROTECT_VDB
 #endif
 
+#if defined(SIGBUS) && !defined(HAVE_SIGBUS) && !defined(CPPCHECK)
+# define HAVE_SIGBUS
+#endif
+
 #ifndef SA_SIGINFO
 # define NO_SA_SIGACTION
 #endif

diff --git a/os_dep.c b/os_dep.c
index f1606be..b3e7fb5 100644 (file)
--- a/os_dep.c
+++ b/os_dep.c
@@ -847,7 +847,7 @@ GC_INNER size_t GC_page_size = 0;
 #       endif
 #   else
       static GC_fault_handler_t old_segv_handler;
-#     ifdef SIGBUS
+#     ifdef HAVE_SIGBUS
         static GC_fault_handler_t old_bus_handler;
 #     endif
 #   endif
@@ -886,7 +886,7 @@ GC_INNER size_t GC_page_size = 0;
 #         endif /* !GC_IRIX_THREADS */
 #       else
           old_segv_handler = signal(SIGSEGV, h);
-#         ifdef SIGBUS
+#         ifdef HAVE_SIGBUS
             old_bus_handler = signal(SIGBUS, h);
 #         endif
 #       endif
@@ -922,7 +922,7 @@ GC_INNER size_t GC_page_size = 0;
 #         endif
 #       else
           (void) signal(SIGSEGV, old_segv_handler);
-#         ifdef SIGBUS
+#         ifdef HAVE_SIGBUS
             (void) signal(SIGBUS, old_bus_handler);
 #         endif
 #       endif

diff --git a/pthread_stop_world.c b/pthread_stop_world.c
index fa13f5c..407db8f 100644 (file)
--- a/pthread_stop_world.c
+++ b/pthread_stop_world.c
@@ -96,7 +96,7 @@ STATIC void GC_remove_allowed_signals(sigset_t *set)
       /* Handlers write to the thread structure, which is in the heap,  */
       /* and hence can trigger a protection fault.                      */
       if (sigdelset(set, SIGSEGV) != 0
-#         ifdef SIGBUS
+#         ifdef HAVE_SIGBUS
             || sigdelset(set, SIGBUS) != 0
 #         endif
           ) {