[Ravenwood] Cleanup and update RavenwoodEnvironment

- Move the UID/PID/targetSdk injection into RavenwoodRuntimeState
- Update VMRuntime to return the configured target SDK level
- Remove the Workaround class in RavenwoodEnvironment
- Implement Os.gettid to make Process.myTid return a real value

Flag: EXEMPT host test change only
Bug: 292141694
Test: $ANDROID_BUILD_TOP/frameworks/base/ravenwood/scripts/run-ravenwood-tests.sh
Change-Id: I611a6cde7c7fb53f71a7a25e93143f4884af734b

6 files changed, 125 insertions, 8 deletions

diff --git a/ravenwood/runtime-helper-src/framework/android/os/Process_ravenwood.java b/ravenwood/runtime-helper-src/framework/android/os/Process_ravenwood.java
new file mode 100644
index 000000000000..3c6a4d78d1d9
--- /dev/null
+++ b/ravenwood/runtime-helper-src/framework/android/os/Process_ravenwood.java
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.os;
+
+import android.util.Pair;
+
+public class Process_ravenwood {
+
+    private static volatile ThreadLocal<Pair<Integer, Boolean>> sThreadPriority;
+
+    static {
+        reset();
+    }
+
+    public static void reset() {
+        // Reset the thread local variable
+        sThreadPriority = ThreadLocal.withInitial(
+                () -> Pair.create(Process.THREAD_PRIORITY_DEFAULT, true));
+    }
+
+    /**
+     * Called by {@link Process#setThreadPriority(int, int)}
+     */
+    public static void setThreadPriority(int tid, int priority) {
+        if (Process.myTid() == tid) {
+            boolean backgroundOk = sThreadPriority.get().second;
+            if (priority >= Process.THREAD_PRIORITY_BACKGROUND && !backgroundOk) {
+                throw new IllegalArgumentException(
+                        "Priority " + priority + " blocked by setCanSelfBackground()");
+            }
+            sThreadPriority.set(Pair.create(priority, backgroundOk));
+        } else {
+            throw new UnsupportedOperationException(
+                    "Cross-thread priority management not yet available in Ravenwood");
+        }
+    }
+
+    /**
+     * Called by {@link Process#setCanSelfBackground(boolean)}
+     */
+    public static void setCanSelfBackground(boolean backgroundOk) {
+        int priority = sThreadPriority.get().first;
+        sThreadPriority.set(Pair.create(priority, backgroundOk));
+    }
+
+    /**
+     * Called by {@link Process#getThreadPriority(int)}
+     */
+    public static int getThreadPriority(int tid) {
+        if (Process.myTid() == tid) {
+            return sThreadPriority.get().first;
+        } else {
+            throw new UnsupportedOperationException(
+                    "Cross-thread priority management not yet available in Ravenwood");
+        }
+    }
+}
diff --git a/ravenwood/runtime-helper-src/framework/com/android/internal/ravenwood/RavenwoodEnvironment_host.java b/ravenwood/runtime-helper-src/framework/com/android/internal/ravenwood/RavenwoodEnvironment_host.java
index e12ff240c4d9..b65668b67e03 100644
--- a/ravenwood/runtime-helper-src/framework/com/android/internal/ravenwood/RavenwoodEnvironment_host.java
+++ b/ravenwood/runtime-helper-src/framework/com/android/internal/ravenwood/RavenwoodEnvironment_host.java
@@ -23,14 +23,6 @@ public class RavenwoodEnvironment_host {
     }
 
     /**
-     * Called from {@link RavenwoodEnvironment#ensureRavenwoodInitialized()}.
-     */
-    public static void ensureRavenwoodInitialized() {
-        // Initialization is now done by RavenwoodAwareTestRunner.
-        // Should we remove it?
-    }
-
-    /**
      * Called from {@link RavenwoodEnvironment#getRavenwoodRuntimePath()}.
      */
     public static String getRavenwoodRuntimePath(RavenwoodEnvironment env) {
diff --git a/ravenwood/runtime-helper-src/libcore-fake/android/system/Os.java b/ravenwood/runtime-helper-src/libcore-fake/android/system/Os.java
index c94ef31a5e5e..02981713674d 100644
--- a/ravenwood/runtime-helper-src/libcore-fake/android/system/Os.java
+++ b/ravenwood/runtime-helper-src/libcore-fake/android/system/Os.java
@@ -16,6 +16,7 @@
 package android.system;
 
 import com.android.ravenwood.RavenwoodRuntimeNative;
+import com.android.ravenwood.RavenwoodRuntimeState;
 import com.android.ravenwood.common.JvmWorkaround;
 
 import java.io.FileDescriptor;
@@ -97,4 +98,16 @@ public final class Os {
     public static void setenv(String name, String value, boolean overwrite) throws ErrnoException {
         RavenwoodRuntimeNative.setenv(name, value, overwrite);
     }
+
+    public static int getpid() {
+        return RavenwoodRuntimeState.sPid;
+    }
+
+    public static int getuid() {
+        return RavenwoodRuntimeState.sUid;
+    }
+
+    public static int gettid() {
+        return RavenwoodRuntimeNative.gettid();
+    }
 }
diff --git a/ravenwood/runtime-helper-src/libcore-fake/com/android/ravenwood/RavenwoodRuntimeNative.java b/ravenwood/runtime-helper-src/libcore-fake/com/android/ravenwood/RavenwoodRuntimeNative.java
index f13189f6f8be..7b940b423b69 100644
--- a/ravenwood/runtime-helper-src/libcore-fake/com/android/ravenwood/RavenwoodRuntimeNative.java
+++ b/ravenwood/runtime-helper-src/libcore-fake/com/android/ravenwood/RavenwoodRuntimeNative.java
@@ -58,6 +58,8 @@ public class RavenwoodRuntimeNative {
 
     public static native void clearSystemProperties();
 
+    public static native int gettid();
+
     public static long lseek(FileDescriptor fd, long offset, int whence) throws ErrnoException {
         return nLseek(JvmWorkaround.getInstance().getFdInt(fd), offset, whence);
     }
diff --git a/ravenwood/runtime-helper-src/libcore-fake/com/android/ravenwood/RavenwoodRuntimeState.java b/ravenwood/runtime-helper-src/libcore-fake/com/android/ravenwood/RavenwoodRuntimeState.java
new file mode 100644
index 000000000000..175e020d61d6
--- /dev/null
+++ b/ravenwood/runtime-helper-src/libcore-fake/com/android/ravenwood/RavenwoodRuntimeState.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.ravenwood;
+
+public class RavenwoodRuntimeState {
+    // This must match VMRuntime.SDK_VERSION_CUR_DEVELOPMENT.
+    public static final int CUR_DEVELOPMENT = 10000;
+
+    public static volatile int sUid;
+    public static volatile int sPid;
+    public static volatile int sTargetSdkLevel;
+
+    static {
+        reset();
+    }
+
+    public static void reset() {
+        sUid = -1;
+        sPid = -1;
+        sTargetSdkLevel = CUR_DEVELOPMENT;
+    }
+}
diff --git a/ravenwood/runtime-helper-src/libcore-fake/dalvik/system/VMRuntime.java b/ravenwood/runtime-helper-src/libcore-fake/dalvik/system/VMRuntime.java
index ba89f71dde8a..eaadac6a8b92 100644
--- a/ravenwood/runtime-helper-src/libcore-fake/dalvik/system/VMRuntime.java
+++ b/ravenwood/runtime-helper-src/libcore-fake/dalvik/system/VMRuntime.java
@@ -19,6 +19,7 @@ package dalvik.system;
 // The original is here:
 // $ANDROID_BUILD_TOP/libcore/libart/src/main/java/dalvik/system/VMRuntime.java
 
+import com.android.ravenwood.RavenwoodRuntimeState;
 import com.android.ravenwood.common.JvmWorkaround;
 
 import java.lang.reflect.Array;
@@ -52,4 +53,8 @@ public class VMRuntime {
     public long addressOf(Object obj) {
         return JvmWorkaround.getInstance().addressOf(obj);
     }
+
+    public int getTargetSdkVersion() {
+        return RavenwoodRuntimeState.sTargetSdkLevel;
+    }
 }