Merge "getRuntimeStat() support (libcore)."
diff --git a/dalvik/src/main/java/dalvik/system/VMDebug.java b/dalvik/src/main/java/dalvik/system/VMDebug.java
index 4b606e6..59e28e2 100644
--- a/dalvik/src/main/java/dalvik/system/VMDebug.java
+++ b/dalvik/src/main/java/dalvik/system/VMDebug.java
@@ -18,6 +18,8 @@
import java.io.FileDescriptor;
import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
/**
* Provides access to some VM-specific debug features. Though this class and
@@ -389,4 +391,57 @@
* @param data the array into which the stats are written.
*/
public static native void getHeapSpaceStats(long[] data);
+
+ /* Map from the names of the runtime stats supported by getRuntimeStat() to their IDs */
+ private static final HashMap<String, Integer> runtimeStatsMap = new HashMap<>();
+
+ static {
+ runtimeStatsMap.put("art.gc.gc-count", 0);
+ runtimeStatsMap.put("art.gc.gc-time", 1);
+ runtimeStatsMap.put("art.gc.bytes-allocated", 2);
+ runtimeStatsMap.put("art.gc.bytes-freed", 3);
+ runtimeStatsMap.put("art.gc.blocking-gc-count", 4);
+ runtimeStatsMap.put("art.gc.blocking-gc-time", 5);
+ runtimeStatsMap.put("art.gc.gc-count-rate-histogram", 6);
+ runtimeStatsMap.put("art.gc.blocking-gc-count-rate-histogram", 7);
+ }
+
+ /**
+ * Returns the value of a particular runtime statistic or {@code null} if no
+ * such runtime statistic exists.
+ *
+ * @param statName
+ * the name of the runtime statistic to look up.
+ * @return the value of the runtime statistic.
+ */
+ public static String getRuntimeStat(String statName) {
+ if (statName == null) {
+ throw new NullPointerException("statName == null");
+ }
+ Integer statId = runtimeStatsMap.get(statName);
+ if (statId != null) {
+ return getRuntimeStatInternal(statId);
+ }
+ return null;
+ }
+
+ /**
+ * Returns a map of the names/values of the runtime statistics
+ * that {@link #getRuntimeStat()} supports.
+ *
+ * @return a map of the names/values of the supported runtime statistics.
+ */
+ public static Map<String, String> getRuntimeStats() {
+ HashMap<String, String> map = new HashMap<>();
+ String[] values = getRuntimeStatsInternal();
+ for (String name : runtimeStatsMap.keySet()) {
+ int id = runtimeStatsMap.get(name);
+ String value = values[id];
+ map.put(name, value);
+ }
+ return map;
+ }
+
+ private static native String getRuntimeStatInternal(int statId);
+ private static native String[] getRuntimeStatsInternal();
}