commit ac578f2587a3bd91b6357fe6cfbef25a627eecde
author Tim Murray <timmurray@google.com> Mon Oct 15 16:26:56 2018 -0700
committer Christopher Ferris <cferris@google.com> Mon Oct 22 16:25:28 2018 -0700
tree f192df82f45783ee7d50f737ef6012fbdb4881e8
parent a8a716e42a8e6b8f28abf2b2f8f93b1e8579423d

malloc: add M_PURGE mallopt flag

Add a new mallopt flag that purges any pending decaying pages.

Test: boots and works
bug 117795621

Change-Id: Ib250ae2b705b6a368c1efb801d6a7be54e075acb
(cherry pciekd from commit 5083e833a650ebe510ed52603ce5c8cd4374c48e)

libc/include/malloc.h

diff --git a/libc/include/malloc.h b/libc/include/malloc.h
index f5fbedf..58a9b1d 100644
--- a/libc/include/malloc.h
+++ b/libc/include/malloc.h
@@ -163,6 +163,7 @@
 
 /** mallopt() option to set the decay time. Valid values are 0 and 1. */
 #define M_DECAY_TIME -100
+#define M_PURGE -101
 
 /**
  * [mallopt(3)](http://man7.org/linux/man-pages/man3/mallopt.3.html) modifies