8315576: compiler/codecache/CodeCacheFullCountTest.java fails after JDK-8314837

Reviewed-by: phh
Backport-of: 343cc0ce2bba797e206f6b7312018a8c6d1bdb66

test/hotspot/jtreg/compiler/codecache/CodeCacheFullCountTest.java

@@ -45,13 +45,21 @@ public class CodeCacheFullCountTest {
         }
     }
 
-    public static void wasteCodeCache()  throws Exception {
+    public static void wasteCodeCache() throws Throwable {
         URL url = CodeCacheFullCountTest.class.getProtectionDomain().getCodeSource().getLocation();
 
+        try {
             for (int i = 0; i < 500; i++) {
                 ClassLoader cl = new MyClassLoader(url);
                 refClass(cl.loadClass("SomeClass"));
             }
+        } catch (Throwable t) {
+            // Expose the root cause of the Throwable instance.
+            while (t.getCause() != null) {
+                t = t.getCause();
+            }
+            throw t;
+        }
     }
 
     public static void runTest() throws Throwable {
@@ -59,7 +67,7 @@ public class CodeCacheFullCountTest {
           "-XX:ReservedCodeCacheSize=2496k", "-XX:-UseCodeCacheFlushing", "CodeCacheFullCountTest", "WasteCodeCache");
         OutputAnalyzer oa = ProcessTools.executeProcess(pb);
         // Ignore adapter creation failures
-        if (oa.getExitValue() != 0 && !oa.getStderr().contains("Out of space in CodeCache for adapters")) {
+        if (oa.getExitValue() != 0 && !oa.getOutput().contains("Out of space in CodeCache for adapters")) {
             oa.reportDiagnosticSummary();
             throw new RuntimeException("VM finished with exit code " + oa.getExitValue());
         }