ART: Add system properties support
Add simple support for GetSystemProperties, GetSystemProperty and
SetSystemProperty. Add a test.
Bug: 31455788
Test: m test-art-host-run-test-922-properties
Change-Id: I02914f04643f0f8fab96f1b372925c2c5306fc9b
diff --git a/test/922-properties/src/Main.java b/test/922-properties/src/Main.java
new file mode 100644
index 0000000..6cec6e9
--- /dev/null
+++ b/test/922-properties/src/Main.java
@@ -0,0 +1,155 @@
+/*
+ * Copyright (C) 2017 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.
+ */
+
+import java.util.Set;
+import java.util.TreeSet;
+
+public class Main {
+ public static void main(String[] args) throws Exception {
+ System.loadLibrary(args[1]);
+
+ doTest();
+ }
+
+ public static void doTest() throws Exception {
+ Set<String> recommendedProperties = getRecommendedProperties();
+
+ System.out.println("Recommended properties:");
+ for (String key : recommendedProperties) {
+ checkProperty(key);
+ }
+
+ Set<String> allProperties = getAllProperties();
+
+ Set<String> retained = new TreeSet<String>(recommendedProperties);
+ retained.retainAll(allProperties);
+ if (!retained.equals(recommendedProperties)) {
+ Set<String> missing = new TreeSet<String>(recommendedProperties);
+ missing.removeAll(retained);
+ System.out.println("Missing recommended properties: " + missing);
+ }
+
+ Set<String> nonRecommended = new TreeSet<String>(allProperties);
+ nonRecommended.removeAll(recommendedProperties);
+
+ System.out.println("Other properties:");
+ for (String key : nonRecommended) {
+ checkProperty(key);
+ }
+
+ System.out.println("Non-specified property:");
+ String key = generate(allProperties);
+ checkProperty(key);
+
+ System.out.println("Non-specified property (2):");
+ String key2 = generateUnique(allProperties);
+ checkProperty(key2);
+ }
+
+ private static Set<String> getRecommendedProperties() {
+ Set<String> keys = new TreeSet<String>();
+ keys.add("java.vm.vendor");
+ keys.add("java.vm.version");
+ keys.add("java.vm.name");
+ keys.add("java.vm.info");
+ keys.add("java.library.path");
+ keys.add("java.class.path");
+ return keys;
+ }
+
+ private static Set<String> getAllProperties() {
+ Set<String> keys = new TreeSet<String>();
+ String[] props = getSystemProperties();
+ for (String p : props) {
+ keys.add(p);
+ }
+ return keys;
+ }
+
+ private static boolean equals(String s1, String s2) {
+ if (s1 == null && s2 == null) {
+ return true;
+ } else if (s1 != null) {
+ return s1.equals(s2);
+ } else {
+ return false;
+ }
+ }
+
+ private static void checkProperty(String key) {
+ System.out.print(" \"" + key + "\": ");
+ String err = null;
+ String value = null;
+ try {
+ value = getSystemProperty(key);
+ } catch (RuntimeException e) {
+ err = e.getMessage();
+ }
+ String sysValue = System.getProperty(key);
+ if (equals(value, sysValue)) {
+ System.out.print("OK");
+ if (err != null) {
+ System.out.println(" !!!" + err);
+ } else {
+ System.out.println();
+ }
+ } else {
+ System.out.println("ERROR !!!" + err);
+ }
+
+ System.out.print(" Setting value to \"abc\": ");
+ try {
+ setSystemProperty(key, "abc");
+ System.out.println("SUCCEEDED");
+ } catch (RuntimeException e) {
+ System.out.println("!!!" + e.getMessage());
+ }
+ }
+
+ private static String generateUnique(Set<String> others) {
+ // Construct something. To be deterministic, just use "a+".
+ StringBuilder sb = new StringBuilder("a");
+ for (;;) {
+ String key = sb.toString();
+ if (!others.contains(key)) {
+ return key;
+ }
+ sb.append('a');
+ }
+ }
+
+ private static String generate(Set<String> others) {
+ // First check for something in the overall System properties.
+ TreeSet<String> sysProps = new TreeSet<String>(System.getProperties().stringPropertyNames());
+ sysProps.removeAll(others);
+ if (!sysProps.isEmpty()) {
+ // Find something that starts with "java" or "os," trying to be platform-independent.
+ for (String s: sysProps) {
+ if (s.startsWith("java.") || s.startsWith("os.")) {
+ return s;
+ }
+ }
+ // Just return the first thing.
+ return sysProps.iterator().next();
+ }
+
+ return generateUnique(others);
+ }
+
+ private static native String[] getSystemProperties();
+ private static native String getSystemProperty(String key);
+ private static native void setSystemProperty(String key, String value);
+}