signal.c: fault address

* signal.c (sigbus, sigsegv): show fault address in the bug message.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43966 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

signal.c

@@ -641,11 +641,16 @@ check_stack_overflow(const void *addr)
 #ifdef _WIN32
 #define CHECK_STACK_OVERFLOW() check_stack_overflow(0)
 #else
-#define CHECK_STACK_OVERFLOW() check_stack_overflow(info->si_addr)
+#define FAULT_ADDRESS info->si_addr
+#define CHECK_STACK_OVERFLOW() check_stack_overflow(FAULT_ADDRESS)
+#define MESSAGE_FAULT_ADDRESS " at %p", FAULT_ADDRESS
 #endif
 #else
 #define CHECK_STACK_OVERFLOW() (void)0
 #endif
+#ifndef MESSAGE_FAULT_ADDRESS
+#define MESSAGE_FAULT_ADDRESS
+#endif
 
 #ifdef SIGBUS
 static RETSIGTYPE
@@ -659,7 +664,7 @@ sigbus(int sig SIGINFO_ARG)
 #if defined __APPLE__
     CHECK_STACK_OVERFLOW();
 #endif
-    rb_bug("Bus Error");
+    rb_bug("Bus Error" MESSAGE_FAULT_ADDRESS);
 }
 #endif
 
@@ -696,7 +701,7 @@ sigsegv(int sig SIGINFO_ARG)
 
     segv_received = 1;
     ruby_disable_gc_stress = 1;
-    rb_bug("Segmentation fault");
+    rb_bug("Segmentation fault" MESSAGE_FAULT_ADDRESS);
 }
 #endif