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Merge "Change the android_mallopt(M_SET_HEAP_TAGGING_LEVEL) API." am: 69872da21d

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Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1484996

Change-Id: Ic42f833733a630374b2d2292971f0b0039edd4fe
This commit is contained in:
Peter Collingbourne
2020-11-18 21:39:11 +00:00
committed by Automerger Merge Worker
parent fad6403b9f 69872da21d
commit 88249ac6ad
1 changed files with 1 additions and 32 deletions
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33
core/jni/com_android_internal_os_Zygote.cpp
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@@ -78,7 +78,6 @@
#include <android-base/unique_fd.h>
#include <bionic/malloc.h>
#include <bionic/mte.h>
#include <bionic/mte_kernel.h>
#include <cutils/fs.h>
#include <cutils/memory.h>
#include <cutils/multiuser.h>
@@ -1676,28 +1675,6 @@ static void BindMountStorageDirs(JNIEnv* env, jobjectArray pkg_data_info_list,
}
}
#ifdef ANDROID_EXPERIMENTAL_MTE
static void SetTagCheckingLevel(int level) {
#ifdef __aarch64__
if (!(getauxval(AT_HWCAP2) & HWCAP2_MTE)) {
return;
}
int tagged_addr_ctrl = prctl(PR_GET_TAGGED_ADDR_CTRL, 0, 0, 0, 0);
if (tagged_addr_ctrl < 0) {
ALOGE("prctl(PR_GET_TAGGED_ADDR_CTRL) failed: %s", strerror(errno));
return;
}
tagged_addr_ctrl = (tagged_addr_ctrl & ~PR_MTE_TCF_MASK) | level;
if (prctl(PR_SET_TAGGED_ADDR_CTRL, tagged_addr_ctrl, 0, 0, 0) < 0) {
ALOGE("prctl(PR_SET_TAGGED_ADDR_CTRL, %d) failed: %s", tagged_addr_ctrl,
strerror(errno));
}
#endif
}
#endif
// Utility routine to specialize a zygote child process.
static void SpecializeCommon(JNIEnv* env, uid_t uid, gid_t gid, jintArray gids,
jint runtime_flags, jobjectArray rlimits,
@@ -1833,22 +1810,14 @@ static void SpecializeCommon(JNIEnv* env, uid_t uid, gid_t gid, jintArray gids,
heap_tagging_level = M_HEAP_TAGGING_LEVEL_TBI;
break;
case RuntimeFlags::MEMORY_TAG_LEVEL_ASYNC:
#ifdef ANDROID_EXPERIMENTAL_MTE
SetTagCheckingLevel(PR_MTE_TCF_ASYNC);
#endif
heap_tagging_level = M_HEAP_TAGGING_LEVEL_ASYNC;
break;
case RuntimeFlags::MEMORY_TAG_LEVEL_SYNC:
#ifdef ANDROID_EXPERIMENTAL_MTE
SetTagCheckingLevel(PR_MTE_TCF_SYNC);
#endif
heap_tagging_level = M_HEAP_TAGGING_LEVEL_SYNC;
break;
default:
#ifdef ANDROID_EXPERIMENTAL_MTE
SetTagCheckingLevel(PR_MTE_TCF_NONE);
#endif
heap_tagging_level = M_HEAP_TAGGING_LEVEL_NONE;
break;
}
android_mallopt(M_SET_HEAP_TAGGING_LEVEL, &heap_tagging_level, sizeof(heap_tagging_level));
// Now that we've used the flag, clear it so that we don't pass unknown flags to the ART runtime.