* gc.c (ruby_stack_check): no check if using sigaltstack.

* signal.c (register_sigaltstack): minimum size is insufficient for
  method calls.

* signal.c (sigsegv): handles stack overflow if possible.

* thread.c (ruby_thread_stack_overflow): helper function to raise
  sysstack_error.

* thread_pthread.c (ruby_stack_overflowed_p): checks for stack
  overflow.


git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@20372 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 0 deletions

diff --git a/gc.c b/gc.c
index e1878de3b..828187512 100644
--- a/gc.c
+++ b/gc.c
@@ -1050,6 +1050,9 @@ ruby_stack_length(VALUE **p)
 int
 ruby_stack_check(void)
 {
+#if defined(POSIX_SIGNAL) && defined(SIGSEGV) && defined(HAVE_SIGALTSTACK)
+    return 0;
+#else
     int ret;
     rb_thread_t *th = GET_THREAD();
     SET_STACK_END;
@@ -1061,6 +1064,7 @@ ruby_stack_check(void)
     }
 #endif
     return ret;
+#endif
 }
 
 static void