8373022: Increase initial heap size for test which assumes no GC

Author: jsikstro

test/hotspot/jtreg/serviceability/sa/ClhsdbScanOops.java

@@ -60,7 +60,10 @@ private static void testWithGcType(String gc) throws Exception {
 
         try {
             ClhsdbLauncher test = new ClhsdbLauncher();
-            theApp = LingeredApp.startApp(gc);
+            // This test assumes that no GC should happen during its execution.
+            // Setting the initial heap size to a reasonable high number avoids
+            // running a GC.
+            theApp = LingeredApp.startApp(gc, "-XX:InitialHeapSize=100M");
 
             System.out.println ("Started LingeredApp with the GC option " + gc +
                                 " and pid " + theApp.getPid());

test/jdk/com/sun/jdi/MethodInvokeWithTraceOnTest.java

@@ -29,7 +29,7 @@
  * @library /test/lib
  * @run build TestScaffold VMConnection TargetListener TargetAdapter
  * @run compile -g MethodInvokeWithTraceOnTest.java
- * @run driver MethodInvokeWithTraceOnTest
+ * @run driver MethodInvokeWithTraceOnTest -XX:InitialHeapSize=100M
  */
 
 import com.sun.jdi.*;