[pypy-commit] stmgc default: clean up shadowstack in demo_random for leaveframe

[Raemi]

Author: Remi Meier <remi.meier at inf.ethz.ch>
Branch: 
Changeset: r1304:8e8c594bbad1
Date: 2014-08-12 17:51 +0200
http://bitbucket.org/pypy/stmgc/changeset/8e8c594bbad1/

Log:	clean up shadowstack in demo_random for leaveframe

diff --git a/c7/demo/demo_random.c b/c7/demo/demo_random.c
--- a/c7/demo/demo_random.c
+++ b/c7/demo/demo_random.c
@@ -393,6 +393,16 @@
             }
         }
     }
+    push_roots();
+    stm_commit_transaction();
+
+    /* even out the shadow stack before leaveframe: */
+    stm_start_inevitable_transaction(&stm_thread_local);
+    while (td.num_roots > 0) {
+        td.num_roots--;
+        objptr_t t;
+        STM_POP_ROOT(stm_thread_local, t);
+    }
     stm_commit_transaction();
 
     stm_rewind_jmp_leaveframe(&stm_thread_local, &rjbuf);