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Merge changes Ibf64db88,I033ee79c

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* changes:
  Pass MTE RuntimeFlags to AppZygote.
  Revert "Pass MTE RuntimeFlags to AppZygote."
This commit is contained in:
Evgenii Stepanov
2021-12-09 20:52:08 +00:00
committed by Gerrit Code Review
parent e97c024d9a 2e50afbd53
commit 689bba18b3
1 changed files with 21 additions and 1 deletions
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22
services/core/java/com/android/server/am/ProcessList.java
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@@ -373,6 +373,16 @@ public final class ProcessList {
@EnabledAfter(targetSdkVersion = Build.VERSION_CODES.Q)
private static final long NATIVE_HEAP_POINTER_TAGGING = 135754954; // This is a bug id.
/**
* Native heap allocations in AppZygote process and its descendants will now have a
* non-zero tag in the most significant byte.
* @see <a href="https://source.android.com/devices/tech/debug/tagged-pointers">Tagged
* Pointers</a>
*/
@ChangeId
@EnabledAfter(targetSdkVersion = Build.VERSION_CODES.S)
private static final long NATIVE_HEAP_POINTER_TAGGING_APP_ZYGOTE = 207557677;
/**
* Enable asynchronous (ASYNC) memory tag checking in this process. This
* flag will only have an effect on hardware supporting the ARM Memory
@@ -1738,6 +1748,16 @@ public final class ProcessList {
return level;
}
private int decideTaggingLevelForAppZygote(ProcessRecord app) {
int level = decideTaggingLevel(app);
// TBI ("fake" pointer tagging) in AppZygote is controlled by a separate compat feature.
if (!mPlatformCompat.isChangeEnabled(NATIVE_HEAP_POINTER_TAGGING_APP_ZYGOTE, app.info)
&& level == Zygote.MEMORY_TAG_LEVEL_TBI) {
level = Zygote.MEMORY_TAG_LEVEL_NONE;
}
return level;
}
private int decideGwpAsanLevel(ProcessRecord app) {
// Look at the process attribute first.
if (app.processInfo != null
@@ -2238,7 +2258,7 @@ public final class ProcessList {
// not the calling one.
appInfo.packageName = app.getHostingRecord().getDefiningPackageName();
appInfo.uid = uid;
int runtimeFlags = decideTaggingLevel(app);
int runtimeFlags = decideTaggingLevelForAppZygote(app);
appZygote = new AppZygote(appInfo, uid, firstUid, lastUid, runtimeFlags);
mAppZygotes.put(app.info.processName, uid, appZygote);
zygoteProcessList = new ArrayList<ProcessRecord>();