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Merge "Zygote: disable heap 0'ing in apps." am: 1e19124f42 am: d44577e9e6 am: c12d11de03

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Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1462849

Change-Id: I3181a2664f53f05692b01d053360a2389141bdc9
This commit is contained in:
Steven Moreland
2020-10-16 18:19:08 +00:00
committed by Automerger Merge Worker
parent 46d86297c9 c12d11de03
commit b402e6930a
1 changed files with 8 additions and 0 deletions
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8
core/jni/com_android_internal_os_Zygote.cpp
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@@ -80,6 +80,7 @@
#include <bionic/mte.h> #include <bionic/mte.h>
#include <bionic/mte_kernel.h> #include <bionic/mte_kernel.h>
#include <cutils/fs.h> #include <cutils/fs.h>
#include <cutils/memory.h>
#include <cutils/multiuser.h> #include <cutils/multiuser.h>
#include <cutils/sockets.h> #include <cutils/sockets.h>
#include <private/android_filesystem_config.h> #include <private/android_filesystem_config.h>
@@ -647,6 +648,13 @@ static void PreApplicationInit() {
// Set the jemalloc decay time to 1. // Set the jemalloc decay time to 1.
mallopt(M_DECAY_TIME, 1); mallopt(M_DECAY_TIME, 1);
// Avoid potentially expensive memory mitigations, mostly meant for system
// processes, in apps. These may cause app compat problems, use more memory,
// or reduce performance. While it would be nice to have them for apps,
// we will have to wait until they are proven out, have more efficient
// hardware, and/or apply them only to new applications.
process_disable_memory_mitigations();
} }
static void SetUpSeccompFilter(uid_t uid, bool is_child_zygote) { static void SetUpSeccompFilter(uid_t uid, bool is_child_zygote) {