288 /**
289 * Tests event stacktrace during metaspace GC threshold if
290 * -XX:+UseParallelGC is used
291 */
292 public static void testMetaspaceParallelGCAllocEvent() throws Exception {
293 GarbageCollectorMXBean bean = garbageCollectorMXBean("PS MarkSweep");
294 MemoryAllocator memory = new MetaspaceMemoryAllocator();
295
296 String[] expectedStack = new String[]{
297 "jdk.jfr.event.gc.stacktrace.AllocationStackTrace.testAllocEvent",
298 "jdk.jfr.event.gc.stacktrace.AllocationStackTrace.testMetaspaceParallelGCAllocEvent"
299 };
300
301 testAllocEvent(bean, memory, expectedStack);
302 }
303
304 /**
305 * Tests event stacktrace for young GC if -XX:+UseG1GC is used
306 */
307 public static void testG1YoungAllocEvent() throws Exception {
308 GarbageCollectorMXBean bean = garbageCollectorMXBean("G1 Young Generation");
309 MemoryAllocator memory = new EdenMemoryAllocator();
310
311 String[] expectedStack = new String[]{
312 "jdk.jfr.event.gc.stacktrace.AllocationStackTrace.testAllocEvent",
313 "jdk.jfr.event.gc.stacktrace.AllocationStackTrace.testG1YoungAllocEvent"
314 };
315
316 testAllocEvent(bean, memory, expectedStack);
317 }
318
319 /**
320 * Tests event stacktrace for old GC if -XX:+UseG1GC is used
321 */
322 public static void testG1OldAllocEvent() throws Exception {
323 GarbageCollectorMXBean bean = garbageCollectorMXBean("G1 Old Generation");
324 MemoryAllocator memory = new OldGenMemoryAllocator();
325
326 String[] expectedStack = new String[]{
327 "jdk.jfr.event.gc.stacktrace.AllocationStackTrace.testAllocEvent",
328 "jdk.jfr.event.gc.stacktrace.AllocationStackTrace.testG1OldAllocEvent"
329 };
330
331 testAllocEvent(bean, memory, expectedStack);
332 }
333
334 /**
335 * Tests event stacktrace during metaspace GC threshold if -XX:+UseG1GC is
336 * used
337 */
338 public static void testMetaspaceG1GCAllocEvent() throws Exception {
339 GarbageCollectorMXBean bean = garbageCollectorMXBean("G1 Young Generation");
340 MemoryAllocator memory = new MetaspaceMemoryAllocator();
341
342 String[] expectedStack = new String[]{
343 "jdk.jfr.event.gc.stacktrace.AllocationStackTrace.testAllocEvent",
344 "jdk.jfr.event.gc.stacktrace.AllocationStackTrace.testMetaspaceG1GCAllocEvent"
345 };
346
347 testAllocEvent(bean, memory, expectedStack);
348 }
349
350 /**
351 * Tests event stacktrace for GC caused by humongous allocations if
352 * -XX:+UseG1GC is used
353 */
354 public static void testG1HumonAllocEvent() throws Exception {
355 // G1 tries to reclaim humongous objects at every young collection
356 // after doing a conservative estimate of its liveness
357 GarbageCollectorMXBean bean = garbageCollectorMXBean("G1 Young Generation");
358 MemoryAllocator memory = new HumongousMemoryAllocator();
359
360 String[] expectedStack = new String[]{
361 "jdk.jfr.event.gc.stacktrace.AllocationStackTrace.testAllocEvent",
362 "jdk.jfr.event.gc.stacktrace.AllocationStackTrace.testG1HumonAllocEvent"
363 };
364
365 testAllocEvent(bean, memory, expectedStack);
366 }
367
368 private static GarbageCollectorMXBean garbageCollectorMXBean(String name) throws Exception {
369 MBeanServer server = ManagementFactory.getPlatformMBeanServer();
370 GarbageCollectorMXBean bean = ManagementFactory.newPlatformMXBeanProxy(
371 server, "java.lang:type=GarbageCollector,name=" + name, GarbageCollectorMXBean.class);
372 return bean;
373 }
374
375 /**
376 * Performs JFR recording, GC provocation/detection and stacktrace
377 * verification for JFR event. In case of verification failure
378 * repeats several times.
379 *
380 * @param bean MX bean for desired GC
381 * @param memory allocator for desired type of allocations
382 * @param expectedStack array of expected frames
383 */
384 private static void testAllocEvent(GarbageCollectorMXBean bean, MemoryAllocator memory, String[] expectedStack) throws Exception {
385 // The test checks the stacktrace of events and expects all the events are fired
386 // in the current thread. But compilation may also trigger GC.
387 // So to filter out such cases the test performs several iterations and expects
388 // that the memory allocations made by the test will produce the desired JFR event.
389 final int iterations = 5;
390 for (int i = 0; i < iterations; i++) {
391 if (allocAndCheck(bean, memory, expectedStack)) {
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288 /**
289 * Tests event stacktrace during metaspace GC threshold if
290 * -XX:+UseParallelGC is used
291 */
292 public static void testMetaspaceParallelGCAllocEvent() throws Exception {
293 GarbageCollectorMXBean bean = garbageCollectorMXBean("PS MarkSweep");
294 MemoryAllocator memory = new MetaspaceMemoryAllocator();
295
296 String[] expectedStack = new String[]{
297 "jdk.jfr.event.gc.stacktrace.AllocationStackTrace.testAllocEvent",
298 "jdk.jfr.event.gc.stacktrace.AllocationStackTrace.testMetaspaceParallelGCAllocEvent"
299 };
300
301 testAllocEvent(bean, memory, expectedStack);
302 }
303
304 /**
305 * Tests event stacktrace for young GC if -XX:+UseG1GC is used
306 */
307 public static void testG1YoungAllocEvent() throws Exception {
308 GarbageCollectorMXBean bean = g1YoungGarbageCollectorMXBean();
309 MemoryAllocator memory = new EdenMemoryAllocator();
310
311 String[] expectedStack = new String[]{
312 "jdk.jfr.event.gc.stacktrace.AllocationStackTrace.testAllocEvent",
313 "jdk.jfr.event.gc.stacktrace.AllocationStackTrace.testG1YoungAllocEvent"
314 };
315
316 testAllocEvent(bean, memory, expectedStack);
317 }
318
319 /**
320 * Tests event stacktrace for old/full GC if -XX:+UseG1GC is used
321 */
322 public static void testG1OldAllocEvent() throws Exception {
323 GarbageCollectorMXBean bean = g1FullGarbageCollectorMXBean();
324 MemoryAllocator memory = new OldGenMemoryAllocator();
325
326 String[] expectedStack = new String[]{
327 "jdk.jfr.event.gc.stacktrace.AllocationStackTrace.testAllocEvent",
328 "jdk.jfr.event.gc.stacktrace.AllocationStackTrace.testG1OldAllocEvent"
329 };
330
331 testAllocEvent(bean, memory, expectedStack);
332 }
333
334 /**
335 * Tests event stacktrace during metaspace GC threshold if -XX:+UseG1GC is
336 * used
337 */
338 public static void testMetaspaceG1GCAllocEvent() throws Exception {
339 GarbageCollectorMXBean bean = g1YoungGarbageCollectorMXBean();
340 MemoryAllocator memory = new MetaspaceMemoryAllocator();
341
342 String[] expectedStack = new String[]{
343 "jdk.jfr.event.gc.stacktrace.AllocationStackTrace.testAllocEvent",
344 "jdk.jfr.event.gc.stacktrace.AllocationStackTrace.testMetaspaceG1GCAllocEvent"
345 };
346
347 testAllocEvent(bean, memory, expectedStack);
348 }
349
350 /**
351 * Tests event stacktrace for GC caused by humongous allocations if
352 * -XX:+UseG1GC is used
353 */
354 public static void testG1HumonAllocEvent() throws Exception {
355 // G1 tries to reclaim humongous objects at every young collection
356 // after doing a conservative estimate of its liveness
357 GarbageCollectorMXBean bean = g1YoungGarbageCollectorMXBean();
358 MemoryAllocator memory = new HumongousMemoryAllocator();
359
360 String[] expectedStack = new String[]{
361 "jdk.jfr.event.gc.stacktrace.AllocationStackTrace.testAllocEvent",
362 "jdk.jfr.event.gc.stacktrace.AllocationStackTrace.testG1HumonAllocEvent"
363 };
364
365 testAllocEvent(bean, memory, expectedStack);
366 }
367
368 private static GarbageCollectorMXBean garbageCollectorMXBean(String name) throws Exception {
369 MBeanServer server = ManagementFactory.getPlatformMBeanServer();
370 GarbageCollectorMXBean bean;
371 try {
372 bean = ManagementFactory.newPlatformMXBeanProxy(server,
373 "java.lang:type=GarbageCollector,name=" + name,
374 GarbageCollectorMXBean.class);
375 } catch (IllegalArgumentException e) {
376 bean = null;
377 }
378 return bean;
379 }
380
381 private static GarbageCollectorMXBean g1YoungGarbageCollectorMXBean() throws Exception {
382 GarbageCollectorMXBean bean = garbageCollectorMXBean("G1 Young Generation");
383 if (bean == null) {
384 bean = garbageCollectorMXBean("G1 Young");
385 }
386 return bean;
387 }
388
389 private static GarbageCollectorMXBean g1FullGarbageCollectorMXBean() throws Exception {
390 GarbageCollectorMXBean bean = garbageCollectorMXBean("G1 Old Generation");
391 if (bean == null) {
392 bean = garbageCollectorMXBean("G1 Full");
393 }
394 return bean;
395 }
396
397 /**
398 * Performs JFR recording, GC provocation/detection and stacktrace
399 * verification for JFR event. In case of verification failure
400 * repeats several times.
401 *
402 * @param bean MX bean for desired GC
403 * @param memory allocator for desired type of allocations
404 * @param expectedStack array of expected frames
405 */
406 private static void testAllocEvent(GarbageCollectorMXBean bean, MemoryAllocator memory, String[] expectedStack) throws Exception {
407 // The test checks the stacktrace of events and expects all the events are fired
408 // in the current thread. But compilation may also trigger GC.
409 // So to filter out such cases the test performs several iterations and expects
410 // that the memory allocations made by the test will produce the desired JFR event.
411 final int iterations = 5;
412 for (int i = 0; i < iterations; i++) {
413 if (allocAndCheck(bean, memory, expectedStack)) {
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