* signal.c (rb_sigaltstack_size): new. calculate stack size for

  sigsegv handler. enlarge value when x86 or x86_64 on Linux.
  Linux has very small MINSIGSTKSZ size (2048 bytes) and
  our sigsegv routine need 5KiB at least. [Bug #7141]
* internal.h: add declaration of rb_sigaltstack_size().
* vm_core.h: remove ALT_STACK_SIZE definition.

* signal.c (rb_register_sigaltstack): replace ALT_STACK_SIZE with
  rb_sigaltstack_size();
* gc.c (Init_heap): ditto.
* vm.c (th_init): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38409 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/gc.c b/gc.c
index 4c5e2b48a8..c87526d016 100644
--- a/gc.c
+++ b/gc.c
@@ -574,7 +574,7 @@ init_heap(rb_objspace_t *objspace)
 	/* altstack of another threads are allocated in another place */
 	rb_thread_t *th = GET_THREAD();
 	void *tmp = th->altstack;
-	th->altstack = malloc(ALT_STACK_SIZE);
+	th->altstack = malloc(rb_sigaltstack_size());
 	free(tmp); /* free previously allocated area */
     }
 #endif