Dump JVM arguments on startup

Flag: EXEMPT host test change only
Bug: 371602426
Test: atest RavenwoodBivalentTest, check the log
Change-Id: I061dad98f1e1f2ebea3dba41a48307c96b990010

1 files changed, 17 insertions, 0 deletions

diff --git a/ravenwood/junit-impl-src/android/platform/test/ravenwood/RavenwoodRuntimeEnvironmentController.java b/ravenwood/junit-impl-src/android/platform/test/ravenwood/RavenwoodRuntimeEnvironmentController.java
index 1c1f15761329..979076eaabfd 100644
--- a/ravenwood/junit-impl-src/android/platform/test/ravenwood/RavenwoodRuntimeEnvironmentController.java
+++ b/ravenwood/junit-impl-src/android/platform/test/ravenwood/RavenwoodRuntimeEnvironmentController.java
@@ -67,6 +67,7 @@ import com.android.ravenwood.common.SneakyThrow;
 import com.android.server.LocalServices;
 import com.android.server.compat.PlatformCompat;
 
+import org.junit.internal.management.ManagementFactory;
 import org.junit.runner.Description;
 
 import java.io.File;
@@ -204,6 +205,8 @@ public class RavenwoodRuntimeEnvironmentController {
         // Some process-wide initialization. (maybe redirect stdout/stderr)
         RavenwoodCommonUtils.loadJniLibrary(LIBRAVENWOOD_INITIALIZER_NAME);
 
+        dumpCommandLineArgs();
+
         // We haven't initialized liblog yet, so directly write to System.out here.
         RavenwoodCommonUtils.log(TAG, "globalInitInner()");
 
@@ -588,4 +591,18 @@ public class RavenwoodRuntimeEnvironmentController {
                     + " access to system property '" + key + "' denied via RavenwoodConfig");
         }
     }
+
+    private static void dumpCommandLineArgs() {
+        Log.i(TAG, "JVM arguments:");
+
+        // Note, we use the wrapper in JUnit4, not the actual class (
+        // java.lang.management.ManagementFactory), because we can't see the later at the build
+        // because this source file is compiled for the device target, where ManagementFactory
+        // doesn't exist.
+        var args = ManagementFactory.getRuntimeMXBean().getInputArguments();
+
+        for (var arg : args) {
+            Log.i(TAG, "  " + arg);
+        }
+    }
 }