From 087e888a1535d814670e4299d04482bae6e8caf1 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 21 Feb 2013 07:34:53 +0000
Subject: signal.c: extract check_stack_overflow

* signal.c (check_stack_overflow): extract duplicated code and get rid
  of declaration-after-statement.  [Bug #5014]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39356 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 signal.c | 35 ++++++++++++++++++++---------------
 1 file changed, 20 insertions(+), 15 deletions(-)

(limited to 'signal.c')

diff --git a/signal.c b/signal.c
index 4bcb79e389..44f5a20a3a 100644
--- a/signal.c
+++ b/signal.c
@@ -604,6 +604,23 @@ rb_get_next_signal(void)
     return sig;
 }
 
+
+#ifdef USE_SIGALTSTACK
+static void
+check_stack_overflow(const void *addr)
+{
+    int ruby_stack_overflowed_p(const rb_thread_t *, const void *);
+    NORETURN(void ruby_thread_stack_overflow(rb_thread_t *th));
+    rb_thread_t *th = GET_THREAD();
+    if (ruby_stack_overflowed_p(th, addr)) {
+	ruby_thread_stack_overflow(th);
+    }
+}
+#define CHECK_STACK_OVERFLOW() check_stack_overflow(info->si_addr)
+#else
+#define CHECK_STACK_OVERFLOW() (void)0
+#endif
+
 #ifdef SIGBUS
 static RETSIGTYPE
 sigbus(int sig SIGINFO_ARG)
@@ -613,13 +630,8 @@ sigbus(int sig SIGINFO_ARG)
  * and it's delivered as SIGBUS instaed of SIGSEGV to userland. It's crazy
  * wrong IMHO. but anyway we have to care it. Sigh.
  */
-#if defined __APPLE__ && defined USE_SIGALTSTACK
-    int ruby_stack_overflowed_p(const rb_thread_t *, const void *);
-    NORETURN(void ruby_thread_stack_overflow(rb_thread_t *th));
-    rb_thread_t *th = GET_THREAD();
-    if (ruby_stack_overflowed_p(th, info->si_addr)) {
-	ruby_thread_stack_overflow(th);
-    }
+#if defined __APPLE__
+    CHECK_STACK_OVERFLOW();
 #endif
     rb_bug("Bus Error");
 }
@@ -651,14 +663,7 @@ sigsegv(int sig SIGINFO_ARG)
 	ruby_abort();
     }
 
-#ifdef USE_SIGALTSTACK
-    int ruby_stack_overflowed_p(const rb_thread_t *, const void *);
-    NORETURN(void ruby_thread_stack_overflow(rb_thread_t *th));
-    rb_thread_t *th = GET_THREAD();
-    if (ruby_stack_overflowed_p(th, info->si_addr)) {
-	ruby_thread_stack_overflow(th);
-    }
-#endif
+    CHECK_STACK_OVERFLOW();
 
     segv_received = 1;
     ruby_disable_gc_stress = 1;
-- 
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