Mercurial > hg > graal-compiler
comparison src/share/vm/gc_implementation/g1/heapRegionSet.cpp @ 17737:0d2ce7411240
8037407: G1: Remove heapRegionSets.cpp
Reviewed-by: tschatzl, pliden
author | brutisso |
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date | Mon, 17 Mar 2014 13:42:16 +0100 |
parents | 58fc1b1523dc |
children | 8ee855b4e667 |
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17736:58fc1b1523dc | 17737:0d2ce7411240 |
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270 HeapRegion* hr = iter.get_next(); | 270 HeapRegion* hr = iter.get_next(); |
271 hr->print_on(out); | 271 hr->print_on(out); |
272 } | 272 } |
273 } | 273 } |
274 } | 274 } |
275 | |
276 void FreeRegionList::verify_list() { | |
277 HeapRegion* curr = head(); | |
278 HeapRegion* prev1 = NULL; | |
279 HeapRegion* prev0 = NULL; | |
280 uint count = 0; | |
281 size_t capacity = 0; | |
282 while (curr != NULL) { | |
283 verify_region(curr); | |
284 | |
285 count++; | |
286 guarantee(count < _unrealistically_long_length, | |
287 hrs_err_msg("[%s] the calculated length: %u seems very long, is there maybe a cycle? curr: "PTR_FORMAT" prev0: "PTR_FORMAT" " "prev1: "PTR_FORMAT" length: %u", name(), count, curr, prev0, prev1, length())); | |
288 | |
289 capacity += curr->capacity(); | |
290 | |
291 prev1 = prev0; | |
292 prev0 = curr; | |
293 curr = curr->next(); | |
294 } | |
295 | |
296 guarantee(tail() == prev0, err_msg("Expected %s to end with %u but it ended with %u.", name(), tail()->hrs_index(), prev0->hrs_index())); | |
297 | |
298 guarantee(length() == count, err_msg("%s count mismatch. Expected %u, actual %u.", name(), length(), count)); | |
299 guarantee(total_capacity_bytes() == capacity, err_msg("%s capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, | |
300 name(), total_capacity_bytes(), capacity)); | |
301 } | |
302 | |
303 // Note on the check_mt_safety() methods below: | |
304 // | |
305 // Verification of the "master" heap region sets / lists that are | |
306 // maintained by G1CollectedHeap is always done during a STW pause and | |
307 // by the VM thread at the start / end of the pause. The standard | |
308 // verification methods all assert check_mt_safety(). This is | |
309 // important as it ensures that verification is done without | |
310 // concurrent updates taking place at the same time. It follows, that, | |
311 // for the "master" heap region sets / lists, the check_mt_safety() | |
312 // method should include the VM thread / STW case. | |
313 | |
314 void MasterFreeRegionListMtSafeChecker::check() { | |
315 // Master Free List MT safety protocol: | |
316 // (a) If we're at a safepoint, operations on the master free list | |
317 // should be invoked by either the VM thread (which will serialize | |
318 // them) or by the GC workers while holding the | |
319 // FreeList_lock. | |
320 // (b) If we're not at a safepoint, operations on the master free | |
321 // list should be invoked while holding the Heap_lock. | |
322 | |
323 if (SafepointSynchronize::is_at_safepoint()) { | |
324 guarantee(Thread::current()->is_VM_thread() || | |
325 FreeList_lock->owned_by_self(), "master free list MT safety protocol at a safepoint"); | |
326 } else { | |
327 guarantee(Heap_lock->owned_by_self(), "master free list MT safety protocol outside a safepoint"); | |
328 } | |
329 } | |
330 | |
331 void SecondaryFreeRegionListMtSafeChecker::check() { | |
332 // Secondary Free List MT safety protocol: | |
333 // Operations on the secondary free list should always be invoked | |
334 // while holding the SecondaryFreeList_lock. | |
335 | |
336 guarantee(SecondaryFreeList_lock->owned_by_self(), "secondary free list MT safety protocol"); | |
337 } | |
338 | |
339 void OldRegionSetMtSafeChecker::check() { | |
340 // Master Old Set MT safety protocol: | |
341 // (a) If we're at a safepoint, operations on the master old set | |
342 // should be invoked: | |
343 // - by the VM thread (which will serialize them), or | |
344 // - by the GC workers while holding the FreeList_lock, if we're | |
345 // at a safepoint for an evacuation pause (this lock is taken | |
346 // anyway when an GC alloc region is retired so that a new one | |
347 // is allocated from the free list), or | |
348 // - by the GC workers while holding the OldSets_lock, if we're at a | |
349 // safepoint for a cleanup pause. | |
350 // (b) If we're not at a safepoint, operations on the master old set | |
351 // should be invoked while holding the Heap_lock. | |
352 | |
353 if (SafepointSynchronize::is_at_safepoint()) { | |
354 guarantee(Thread::current()->is_VM_thread() | |
355 || FreeList_lock->owned_by_self() || OldSets_lock->owned_by_self(), | |
356 "master old set MT safety protocol at a safepoint"); | |
357 } else { | |
358 guarantee(Heap_lock->owned_by_self(), "master old set MT safety protocol outside a safepoint"); | |
359 } | |
360 } | |
361 | |
362 void HumongousRegionSetMtSafeChecker::check() { | |
363 // Humongous Set MT safety protocol: | |
364 // (a) If we're at a safepoint, operations on the master humongous | |
365 // set should be invoked by either the VM thread (which will | |
366 // serialize them) or by the GC workers while holding the | |
367 // OldSets_lock. | |
368 // (b) If we're not at a safepoint, operations on the master | |
369 // humongous set should be invoked while holding the Heap_lock. | |
370 | |
371 if (SafepointSynchronize::is_at_safepoint()) { | |
372 guarantee(Thread::current()->is_VM_thread() || | |
373 OldSets_lock->owned_by_self(), | |
374 "master humongous set MT safety protocol at a safepoint"); | |
375 } else { | |
376 guarantee(Heap_lock->owned_by_self(), | |
377 "master humongous set MT safety protocol outside a safepoint"); | |
378 } | |
379 } |