From d831831822885717e9841f1ff67c19add566fa45 Mon Sep 17 00:00:00 2001
From: Luke Dashjr <luke-jr+git@utopios.org>
Date: Thu, 14 Mar 2019 13:36:24 +0000
Subject: [PATCH] lockedpool: When possible, use madvise to avoid including
 sensitive information in core dumps

---
 src/support/lockedpool.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/support/lockedpool.cpp b/src/support/lockedpool.cpp
index 070b3ed80e7..fc1f660aece 100644
--- a/src/support/lockedpool.cpp
+++ b/src/support/lockedpool.cpp
@@ -250,6 +250,9 @@ void *PosixLockedPageAllocator::AllocateLocked(size_t len, bool *lockingSuccess)
     addr = mmap(nullptr, len, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
     if (addr) {
         *lockingSuccess = mlock(addr, len) == 0;
+#ifdef MADV_DONTDUMP
+        madvise(addr, len, MADV_DONTDUMP);
+#endif
     }
     return addr;
 }