From 11557daaec63db3fab270ba5293e38abf3efc135 Mon Sep 17 00:00:00 2001
From: Jon Meredith <jmeredith@basho.com>
Date: Fri, 15 Jun 2012 16:29:36 +0100
Subject: [PATCH] Lock spidermonkey_drv.so in memory so NSPR thread cleanup
 code runs.

Fixes SEGV under R15B
---
 c_src/spidermonkey_drv.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/c_src/spidermonkey_drv.c b/c_src/spidermonkey_drv.c
index d9f2e73..3a90381 100644
--- a/c_src/spidermonkey_drv.c
+++ b/c_src/spidermonkey_drv.c
@@ -193,6 +193,13 @@ static ErlDrvData start(ErlDrvPort port, char *cmd) {
   retval->atom_ok = driver_mk_atom((char *) "ok");
   retval->atom_error = driver_mk_atom((char *) "error");
   retval->atom_unknown_cmd = driver_mk_atom((char *) "unknown_command");
+
+  /* Lock the driver in memory.  NSPR registers some thread cleanup
+  ** code in _pt_thread_death on the async thread pool which
+  ** gets called after spidermonkey_drv.so is unloaded on R15B
+  */
+  driver_lock_driver(port);
+
   return (ErlDrvData) retval;
 }