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Freezer: check freeze binder ioctl

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Some old kernels don't have the necessary binder ioctls for freezer
(BINDER_FREEZE & BINDER_GET_FROZEN_INFO). In such a case, disable
freezer with a warning log.

Bug: 199803449
Test: confirm freezer is enabled/disabled on new/old kernels
Change-Id: I9e19515746d4c415dc5eb871e2d3e232c0876a15
This commit is contained in:
Li Li
2021-09-17 11:01:56 -07:00
parent b7c776aa19
commit 3a9b8aefcd
1 changed files with 7 additions and 3 deletions
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10
services/core/java/com/android/server/am/CachedAppOptimizer.java
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@@ -645,21 +645,25 @@ public final class CachedAppOptimizer {
char state = (char) fr.read();
if (state == '1' || state == '0') {
// Also check freezer binder ioctl
getBinderFreezeInfo(Process.myPid());
supported = true;
} else {
Slog.e(TAG_AM, "unexpected value in cgroup.freeze");
}
} catch (java.io.FileNotFoundException e) {
Slog.d(TAG_AM, "cgroup.freeze not present");
Slog.w(TAG_AM, "cgroup.freeze not present");
} catch (RuntimeException e) {
Slog.w(TAG_AM, "unable to read freezer info");
} catch (Exception e) {
Slog.d(TAG_AM, "unable to read cgroup.freeze: " + e.toString());
Slog.w(TAG_AM, "unable to read cgroup.freeze: " + e.toString());
}
if (fr != null) {
try {
fr.close();
} catch (java.io.IOException e) {
Slog.e(TAG_AM, "Exception closing freezer.killable: " + e.toString());
Slog.e(TAG_AM, "Exception closing cgroup.freeze: " + e.toString());
}
}