add new instruction attribute called leaf

An instruction is leaf if it has no rb_funcall inside.  In order to
check this property, we introduce stack canary which is a random
number collected at runtime.  Stack top is always filled with this
number and checked for stack smashing operations, when VM_CHECK_MODE.
[GH-1947]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64677 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/random.c b/random.c
index 14588c75d7..d8cfd38016 100644
--- a/random.c
+++ b/random.c
@@ -573,7 +573,7 @@ fill_random_bytes_syscall(void *seed, size_t size, int need_secure)
 # define fill_random_bytes_syscall(seed, size, need_secure) -1
 #endif
 
-static int
+int
 fill_random_bytes(void *seed, size_t size, int need_secure)
 {
     int ret = fill_random_bytes_syscall(seed, size, need_secure);