44 
45     public static void main(String[] args) throws Exception {                                                              
46         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(                                                         
47             "-XX:+UseG1GC",                                                                                                
48             "-Xms" + heapSize + "m",                                                                                       
49             "-Xmx" + heapSize + "m",                                                                                       
50             "-XX:G1HeapRegionSize=" + heapRegionSize + "m",                                                                
51             "-Xlog:gc",                                                                                                    
52             HumongousObjectAllocator.class.getName());                                                                     
53 
54         OutputAnalyzer output = new OutputAnalyzer(pb.start());                                                            
55         output.shouldContain("Pause Young (Concurrent Start) (G1 Humongous Allocation)");                                  
56         output.shouldHaveExitValue(0);                                                                                     
57     }                                                                                                                      
58 
59     static class HumongousObjectAllocator {                                                                                
60         public static void main(String [] args) {                                                                          
61             for (int i = 0; i < heapSize; i++) {                                                                           
62                 // 131069 is the number of longs it takes to fill a heapRegion except                                      
63                 // for 8 bytes on 64 bit.                                                                                  
                                                                                                                           
64                 long[] largeObect = new long[131069];                                                                      
65             }                                                                                                              
66         }                                                                                                                  
67     }                                                                                                                      
68 }                                                                                                                          
69 

44 
45     public static void main(String[] args) throws Exception {
46         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
47             "-XX:+UseG1GC",
48             "-Xms" + heapSize + "m",
49             "-Xmx" + heapSize + "m",
50             "-XX:G1HeapRegionSize=" + heapRegionSize + "m",
51             "-Xlog:gc",
52             HumongousObjectAllocator.class.getName());
53 
54         OutputAnalyzer output = new OutputAnalyzer(pb.start());
55         output.shouldContain("Pause Young (Concurrent Start) (G1 Humongous Allocation)");
56         output.shouldHaveExitValue(0);
57     }
58 
59     static class HumongousObjectAllocator {
60         public static void main(String [] args) {
61             for (int i = 0; i < heapSize; i++) {
62                 // 131069 is the number of longs it takes to fill a heapRegion except
63                 // for 8 bytes on 64 bit.
64                 @SuppressWarnings("unused")
65                 long[] largeObect = new long[131069];
66             }
67         }
68     }
69 }
70