54
55 void ShenandoahAsserts::print_obj(ShenandoahMessageBuffer& msg, oop obj) {
56 ShenandoahHeap* heap = ShenandoahHeap::heap();
57 ShenandoahHeapRegion *r = heap->heap_region_containing(obj);
58
59 ResourceMark rm;
60 stringStream ss;
61 r->print_on(&ss);
62
63 stringStream mw_ss;
64 obj->mark().print_on(&mw_ss);
65
66 ShenandoahMarkingContext* const ctx = heap->marking_context();
67
68 msg.append(" " PTR_FORMAT " - klass " PTR_FORMAT " %s\n", p2i(obj), p2i(obj->klass()), obj->klass()->external_name());
69 msg.append(" %3s allocated after mark start\n", ctx->allocated_after_mark_start(obj) ? "" : "not");
70 msg.append(" %3s after update watermark\n", cast_from_oop<HeapWord*>(obj) >= r->get_update_watermark() ? "" : "not");
71 msg.append(" %3s marked strong\n", ctx->is_marked_strong(obj) ? "" : "not");
72 msg.append(" %3s marked weak\n", ctx->is_marked_weak(obj) ? "" : "not");
73 msg.append(" %3s in collection set\n", heap->in_collection_set(obj) ? "" : "not");
74 msg.append(" mark:%s\n", mw_ss.freeze());
75 msg.append(" region: %s", ss.freeze());
76 }
77
78 void ShenandoahAsserts::print_non_obj(ShenandoahMessageBuffer& msg, void* loc) {
79 ShenandoahHeap* heap = ShenandoahHeap::heap();
80 if (heap->is_in_reserved(loc)) {
81 msg.append(" inside Java heap\n");
82 ShenandoahHeapRegion *r = heap->heap_region_containing(loc);
83 stringStream ss;
84 r->print_on(&ss);
85
86 msg.append(" %3s in collection set\n", heap->in_collection_set_loc(loc) ? "" : "not");
87 msg.append(" region: %s", ss.freeze());
88 } else {
89 msg.append(" outside of Java heap\n");
90 stringStream ss;
91 os::print_location(&ss, (intptr_t) loc, false);
92 msg.append(" %s", ss.freeze());
93 }
245 if (!heap->is_in(fwd)) {
246 print_failure(_safe_oop, obj, interior_loc, nullptr, "Shenandoah assert_correct failed",
247 "Forwardee should be in active region area",
248 file, line);
249 }
250
251 if (heap->heap_region_index_containing(fwd) == heap->heap_region_index_containing(obj)) {
252 print_failure(_safe_all, obj, interior_loc, nullptr, "Shenandoah assert_correct failed",
253 "Non-trivial forwardee should be in another region",
254 file, line);
255 }
256
257 // Step 4. Check for multiple forwardings
258 oop fwd2 = ShenandoahForwarding::get_forwardee_raw_unchecked(fwd);
259 if (fwd != fwd2) {
260 print_failure(_safe_all, obj, interior_loc, nullptr, "Shenandoah assert_correct failed",
261 "Multiple forwardings",
262 file, line);
263 }
264 }
265 }
266
267 void ShenandoahAsserts::assert_in_correct_region(void* interior_loc, oop obj, const char* file, int line) {
268 assert_correct(interior_loc, obj, file, line);
269
270 ShenandoahHeap* heap = ShenandoahHeap::heap();
271 ShenandoahHeapRegion* r = heap->heap_region_containing(obj);
272 if (!r->is_active()) {
273 print_failure(_safe_unknown, obj, interior_loc, nullptr, "Shenandoah assert_in_correct_region failed",
274 "Object must reside in active region",
275 file, line);
276 }
277
278 size_t alloc_size = obj->size();
279 if (alloc_size > ShenandoahHeapRegion::humongous_threshold_words()) {
280 size_t idx = r->index();
281 size_t num_regions = ShenandoahHeapRegion::required_regions(alloc_size * HeapWordSize);
282 for (size_t i = idx; i < idx + num_regions; i++) {
283 ShenandoahHeapRegion* chain_reg = heap->get_region(i);
284 if (i == idx && !chain_reg->is_humongous_start()) {
285 print_failure(_safe_unknown, obj, interior_loc, nullptr, "Shenandoah assert_in_correct_region failed",
286 "Object must reside in humongous start",
287 file, line);
288 }
289 if (i != idx && !chain_reg->is_humongous_continuation()) {
290 print_failure(_safe_oop, obj, interior_loc, nullptr, "Shenandoah assert_in_correct_region failed",
291 "Humongous continuation should be of proper size",
292 file, line);
293 }
294 }
295 }
296 }
297
298 void ShenandoahAsserts::assert_forwarded(void* interior_loc, oop obj, const char* file, int line) {
299 assert_correct(interior_loc, obj, file, line);
380 file, line);
381 }
382 }
383
384 void ShenandoahAsserts::print_rp_failure(const char *label, BoolObjectClosure* actual,
385 const char *file, int line) {
386 ShenandoahMessageBuffer msg("%s\n", label);
387 msg.append(" Actual: " PTR_FORMAT "\n", p2i(actual));
388 report_vm_error(file, line, msg.buffer());
389 }
390
391 void ShenandoahAsserts::assert_locked_or_shenandoah_safepoint(Mutex* lock, const char* file, int line) {
392 if (ShenandoahSafepoint::is_at_shenandoah_safepoint()) {
393 return;
394 }
395
396 if (lock->owned_by_self()) {
397 return;
398 }
399
400 ShenandoahMessageBuffer msg("Must ba at a Shenandoah safepoint or held %s lock", lock->name());
401 report_vm_error(file, line, msg.buffer());
402 }
403
404 void ShenandoahAsserts::assert_heaplocked(const char* file, int line) {
405 ShenandoahHeap* heap = ShenandoahHeap::heap();
406
407 if (heap->lock()->owned_by_self()) {
408 return;
409 }
410
411 ShenandoahMessageBuffer msg("Heap lock must be owned by current thread");
412 report_vm_error(file, line, msg.buffer());
413 }
414
415 void ShenandoahAsserts::assert_not_heaplocked(const char* file, int line) {
416 ShenandoahHeap* heap = ShenandoahHeap::heap();
417
418 if (!heap->lock()->owned_by_self()) {
419 return;
420 }
421
422 ShenandoahMessageBuffer msg("Heap lock must not be owned by current thread");
423 report_vm_error(file, line, msg.buffer());
424 }
425
426 void ShenandoahAsserts::assert_heaplocked_or_safepoint(const char* file, int line) {
427 ShenandoahHeap* heap = ShenandoahHeap::heap();
428
429 if (heap->lock()->owned_by_self()) {
430 return;
431 }
432
433 if (ShenandoahSafepoint::is_at_shenandoah_safepoint() && Thread::current()->is_VM_thread()) {
434 return;
435 }
436
437 ShenandoahMessageBuffer msg("Heap lock must be owned by current thread, or be at safepoint");
438 report_vm_error(file, line, msg.buffer());
439 }
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54
55 void ShenandoahAsserts::print_obj(ShenandoahMessageBuffer& msg, oop obj) {
56 ShenandoahHeap* heap = ShenandoahHeap::heap();
57 ShenandoahHeapRegion *r = heap->heap_region_containing(obj);
58
59 ResourceMark rm;
60 stringStream ss;
61 r->print_on(&ss);
62
63 stringStream mw_ss;
64 obj->mark().print_on(&mw_ss);
65
66 ShenandoahMarkingContext* const ctx = heap->marking_context();
67
68 msg.append(" " PTR_FORMAT " - klass " PTR_FORMAT " %s\n", p2i(obj), p2i(obj->klass()), obj->klass()->external_name());
69 msg.append(" %3s allocated after mark start\n", ctx->allocated_after_mark_start(obj) ? "" : "not");
70 msg.append(" %3s after update watermark\n", cast_from_oop<HeapWord*>(obj) >= r->get_update_watermark() ? "" : "not");
71 msg.append(" %3s marked strong\n", ctx->is_marked_strong(obj) ? "" : "not");
72 msg.append(" %3s marked weak\n", ctx->is_marked_weak(obj) ? "" : "not");
73 msg.append(" %3s in collection set\n", heap->in_collection_set(obj) ? "" : "not");
74 if (heap->mode()->is_generational() && !obj->is_forwarded()) {
75 msg.append(" age: %d\n", obj->age());
76 }
77 msg.append(" mark:%s\n", mw_ss.freeze());
78 msg.append(" region: %s", ss.freeze());
79 }
80
81 void ShenandoahAsserts::print_non_obj(ShenandoahMessageBuffer& msg, void* loc) {
82 ShenandoahHeap* heap = ShenandoahHeap::heap();
83 if (heap->is_in_reserved(loc)) {
84 msg.append(" inside Java heap\n");
85 ShenandoahHeapRegion *r = heap->heap_region_containing(loc);
86 stringStream ss;
87 r->print_on(&ss);
88
89 msg.append(" %3s in collection set\n", heap->in_collection_set_loc(loc) ? "" : "not");
90 msg.append(" region: %s", ss.freeze());
91 } else {
92 msg.append(" outside of Java heap\n");
93 stringStream ss;
94 os::print_location(&ss, (intptr_t) loc, false);
95 msg.append(" %s", ss.freeze());
96 }
248 if (!heap->is_in(fwd)) {
249 print_failure(_safe_oop, obj, interior_loc, nullptr, "Shenandoah assert_correct failed",
250 "Forwardee should be in active region area",
251 file, line);
252 }
253
254 if (heap->heap_region_index_containing(fwd) == heap->heap_region_index_containing(obj)) {
255 print_failure(_safe_all, obj, interior_loc, nullptr, "Shenandoah assert_correct failed",
256 "Non-trivial forwardee should be in another region",
257 file, line);
258 }
259
260 // Step 4. Check for multiple forwardings
261 oop fwd2 = ShenandoahForwarding::get_forwardee_raw_unchecked(fwd);
262 if (fwd != fwd2) {
263 print_failure(_safe_all, obj, interior_loc, nullptr, "Shenandoah assert_correct failed",
264 "Multiple forwardings",
265 file, line);
266 }
267 }
268
269 // Do additional checks for special objects: their fields can hold metadata as well.
270 // We want to check class loading/unloading did not corrupt them.
271
272 if (obj_klass == vmClasses::Class_klass()) {
273 Metadata* klass = obj->metadata_field(java_lang_Class::klass_offset());
274 if (klass != nullptr && !Metaspace::contains(klass)) {
275 print_failure(_safe_all, obj, interior_loc, nullptr, "Shenandoah assert_correct failed",
276 "Instance class mirror should point to Metaspace",
277 file, line);
278 }
279
280 Metadata* array_klass = obj->metadata_field(java_lang_Class::array_klass_offset());
281 if (array_klass != nullptr && !Metaspace::contains(array_klass)) {
282 print_failure(_safe_all, obj, interior_loc, nullptr, "Shenandoah assert_correct failed",
283 "Array class mirror should point to Metaspace",
284 file, line);
285 }
286 }
287 }
288
289 void ShenandoahAsserts::assert_in_correct_region(void* interior_loc, oop obj, const char* file, int line) {
290 assert_correct(interior_loc, obj, file, line);
291
292 ShenandoahHeap* heap = ShenandoahHeap::heap();
293 ShenandoahHeapRegion* r = heap->heap_region_containing(obj);
294 if (!r->is_active()) {
295 print_failure(_safe_unknown, obj, interior_loc, nullptr, "Shenandoah assert_in_correct_region failed",
296 "Object must reside in active region",
297 file, line);
298 }
299
300 size_t alloc_size = obj->size();
301 if (ShenandoahHeapRegion::requires_humongous(alloc_size)) {
302 size_t idx = r->index();
303 size_t num_regions = ShenandoahHeapRegion::required_regions(alloc_size * HeapWordSize);
304 for (size_t i = idx; i < idx + num_regions; i++) {
305 ShenandoahHeapRegion* chain_reg = heap->get_region(i);
306 if (i == idx && !chain_reg->is_humongous_start()) {
307 print_failure(_safe_unknown, obj, interior_loc, nullptr, "Shenandoah assert_in_correct_region failed",
308 "Object must reside in humongous start",
309 file, line);
310 }
311 if (i != idx && !chain_reg->is_humongous_continuation()) {
312 print_failure(_safe_oop, obj, interior_loc, nullptr, "Shenandoah assert_in_correct_region failed",
313 "Humongous continuation should be of proper size",
314 file, line);
315 }
316 }
317 }
318 }
319
320 void ShenandoahAsserts::assert_forwarded(void* interior_loc, oop obj, const char* file, int line) {
321 assert_correct(interior_loc, obj, file, line);
402 file, line);
403 }
404 }
405
406 void ShenandoahAsserts::print_rp_failure(const char *label, BoolObjectClosure* actual,
407 const char *file, int line) {
408 ShenandoahMessageBuffer msg("%s\n", label);
409 msg.append(" Actual: " PTR_FORMAT "\n", p2i(actual));
410 report_vm_error(file, line, msg.buffer());
411 }
412
413 void ShenandoahAsserts::assert_locked_or_shenandoah_safepoint(Mutex* lock, const char* file, int line) {
414 if (ShenandoahSafepoint::is_at_shenandoah_safepoint()) {
415 return;
416 }
417
418 if (lock->owned_by_self()) {
419 return;
420 }
421
422 ShenandoahMessageBuffer msg("Must be at a Shenandoah safepoint or held %s lock", lock->name());
423 report_vm_error(file, line, msg.buffer());
424 }
425
426 void ShenandoahAsserts::assert_heaplocked(const char* file, int line) {
427 ShenandoahHeap* heap = ShenandoahHeap::heap();
428
429 if (heap->lock()->owned_by_self()) {
430 return;
431 }
432
433 ShenandoahMessageBuffer msg("Heap lock must be owned by current thread");
434 report_vm_error(file, line, msg.buffer());
435 }
436
437 void ShenandoahAsserts::assert_not_heaplocked(const char* file, int line) {
438 ShenandoahHeap* heap = ShenandoahHeap::heap();
439
440 if (!heap->lock()->owned_by_self()) {
441 return;
442 }
443
444 ShenandoahMessageBuffer msg("Heap lock must not be owned by current thread");
445 report_vm_error(file, line, msg.buffer());
446 }
447
448 void ShenandoahAsserts::assert_heaplocked_or_safepoint(const char* file, int line) {
449 ShenandoahHeap* heap = ShenandoahHeap::heap();
450
451 if (heap->lock()->owned_by_self()) {
452 return;
453 }
454
455 if (ShenandoahSafepoint::is_at_shenandoah_safepoint()) {
456 return;
457 }
458
459 ShenandoahMessageBuffer msg("Heap lock must be owned by current thread, or be at safepoint");
460 report_vm_error(file, line, msg.buffer());
461 }
462
463 void ShenandoahAsserts::assert_generational(const char* file, int line) {
464 if (ShenandoahHeap::heap()->mode()->is_generational()) {
465 return;
466 }
467
468 ShenandoahMessageBuffer msg("Must be in generational mode");
469 report_vm_error(file, line, msg.buffer());
470 }
471
472 void ShenandoahAsserts::assert_control_or_vm_thread_at_safepoint(bool at_safepoint, const char* file, int line) {
473 Thread* thr = Thread::current();
474 if (thr == ShenandoahHeap::heap()->control_thread()) {
475 return;
476 }
477 if (thr->is_VM_thread()) {
478 if (!at_safepoint) {
479 return;
480 } else if (SafepointSynchronize::is_at_safepoint()) {
481 return;
482 }
483 }
484
485 ShenandoahMessageBuffer msg("Must be either control thread, or vm thread");
486 if (at_safepoint) {
487 msg.append(" at a safepoint");
488 }
489 report_vm_error(file, line, msg.buffer());
490 }
491
492 void ShenandoahAsserts::assert_generations_reconciled(const char* file, int line) {
493 if (!SafepointSynchronize::is_at_safepoint()) {
494 return;
495 }
496
497 ShenandoahHeap* heap = ShenandoahHeap::heap();
498 ShenandoahGeneration* ggen = heap->gc_generation();
499 ShenandoahGeneration* agen = heap->active_generation();
500 if (agen == ggen) {
501 return;
502 }
503
504 ShenandoahMessageBuffer msg("Active(%d) & GC(%d) Generations aren't reconciled", agen->type(), ggen->type());
505 report_vm_error(file, line, msg.buffer());
506 }
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