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-rw-r--r--src/mongo/base/secure_allocator.cpp11
1 files changed, 11 insertions, 0 deletions
diff --git a/src/mongo/base/secure_allocator.cpp b/src/mongo/base/secure_allocator.cpp
index ecfc6b12f0d..b888c6e781a 100644
--- a/src/mongo/base/secure_allocator.cpp
+++ b/src/mongo/base/secure_allocator.cpp
@@ -154,10 +154,21 @@ void* systemAllocate(std::size_t bytes) {
fassertFailed(28832);
}
+#if defined(MADV_DONTDUMP)
+ // We deliberately ignore the return value since if the Linux version is < 3.4, madvise
+ // will fail since MADV_DONTDUMP is not supported.
+ (void)madvise(ptr, bytes, MADV_DONTDUMP);
+#endif
+
return ptr;
}
void systemDeallocate(void* ptr, std::size_t bytes) {
+#if defined(MADV_DONTDUMP) && defined(MADV_DODUMP)
+ // See comment above madvise in systemAllocate().
+ (void)madvise(ptr, bytes, MADV_DODUMP);
+#endif
+
if (munlock(ptr, bytes) != 0) {
severe() << errnoWithPrefix("Failed to munlock");
fassertFailed(28833);