truffle: src/share/vm/gc_interface/collectedHeap.cpp annotate

annotate src/share/vm/gc_interface/collectedHeap.cpp @ 4872:aa3d708d67c4

7141200: log some interesting information in ring buffers for crashes Reviewed-by: kvn, jrose, kevinw, brutisso, twisti, jmasa

author	never
date	Wed, 01 Feb 2012 07:59:01 -0800
parents	b6a04c79ccbc
children	09d00c18e323

rev	line source
0 a61af66fc99e Initial load duke parents: diff changeset	1 /*
4872 aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
0 a61af66fc99e Initial load duke parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
a61af66fc99e Initial load duke parents: diff changeset	4 *
a61af66fc99e Initial load duke parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
a61af66fc99e Initial load duke parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
a61af66fc99e Initial load duke parents: diff changeset	7 * published by the Free Software Foundation.
a61af66fc99e Initial load duke parents: diff changeset	8 *
a61af66fc99e Initial load duke parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
a61af66fc99e Initial load duke parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
a61af66fc99e Initial load duke parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
a61af66fc99e Initial load duke parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
a61af66fc99e Initial load duke parents: diff changeset	13 * accompanied this code).
a61af66fc99e Initial load duke parents: diff changeset	14 *
a61af66fc99e Initial load duke parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
a61af66fc99e Initial load duke parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
a61af66fc99e Initial load duke parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
a61af66fc99e Initial load duke parents: diff changeset	18 *
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1549 diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1549 diff changeset	20 * or visit www.oracle.com if you need additional information or have any
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1549 diff changeset	21 * questions.
0 a61af66fc99e Initial load duke parents: diff changeset	22 *
a61af66fc99e Initial load duke parents: diff changeset	23 */
a61af66fc99e Initial load duke parents: diff changeset	24
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	25 #include "precompiled.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	26 #include "classfile/systemDictionary.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	27 #include "gc_implementation/shared/vmGCOperations.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	28 #include "gc_interface/collectedHeap.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	29 #include "gc_interface/collectedHeap.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	30 #include "oops/oop.inline.hpp"
4009 e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	31 #include "oops/instanceMirrorKlass.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	32 #include "runtime/init.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	33 #include "services/heapDumper.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	34 #ifdef TARGET_OS_FAMILY_linux
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	35 # include "thread_linux.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	36 #endif
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	37 #ifdef TARGET_OS_FAMILY_solaris
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	38 # include "thread_solaris.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	39 #endif
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	40 #ifdef TARGET_OS_FAMILY_windows
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	41 # include "thread_windows.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1833 diff changeset	42 #endif
3960 f08d439fab8c 7089790: integrate bsd-port changes never parents: 3910 diff changeset	43 #ifdef TARGET_OS_FAMILY_bsd
f08d439fab8c 7089790: integrate bsd-port changes never parents: 3910 diff changeset	44 # include "thread_bsd.inline.hpp"
f08d439fab8c 7089790: integrate bsd-port changes never parents: 3910 diff changeset	45 #endif
0 a61af66fc99e Initial load duke parents: diff changeset	46
a61af66fc99e Initial load duke parents: diff changeset	47
a61af66fc99e Initial load duke parents: diff changeset	48 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	49 int CollectedHeap::_fire_out_of_memory_count = 0;
a61af66fc99e Initial load duke parents: diff changeset	50 #endif
a61af66fc99e Initial load duke parents: diff changeset	51
481 7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	52 size_t CollectedHeap::_filler_array_max_size = 0;
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	53
4872 aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	54 template <>
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	55 void EventLogBase<GCMessage>::print(outputStream* st, GCMessage& m) {
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	56 st->print_cr("GC heap %s", m.is_before ? "before" : "after");
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	57 st->print_raw(m);
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	58 }
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	59
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	60 void GCHeapLog::log_heap(bool before) {
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	61 if (!should_log()) {
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	62 return;
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	63 }
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	64
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	65 jlong timestamp = os::javaTimeNanos() / NANOSECS_PER_MILLISEC;
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	66 MutexLockerEx ml(&_mutex, Mutex::_no_safepoint_check_flag);
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	67 int index = compute_log_index();
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	68 _records[index].thread = NULL; // Its the GC thread so it's not that interesting.
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	69 _records[index].timestamp = timestamp;
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	70 _records[index].data.is_before = before;
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	71 stringStream st(_records[index].data.buffer(), _records[index].data.size());
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	72 if (before) {
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	73 Universe::print_heap_before_gc(&st);
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	74 } else {
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	75 Universe::print_heap_after_gc(&st);
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	76 }
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	77 }
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	78
0 a61af66fc99e Initial load duke parents: diff changeset	79 // Memory state functions.
a61af66fc99e Initial load duke parents: diff changeset	80
1833 8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1579 diff changeset	81
8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1579 diff changeset	82 CollectedHeap::CollectedHeap() : _n_par_threads(0)
8b10f48633dc 6984287: Regularize how GC parallel workers are specified. jmasa parents: 1579 diff changeset	83
481 7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	84 {
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	85 const size_t max_len = size_t(arrayOopDesc::max_array_length(T_INT));
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	86 const size_t elements_per_word = HeapWordSize / sizeof(jint);
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	87 _filler_array_max_size = align_object_size(filler_array_hdr_size() +
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	88 max_len * elements_per_word);
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	89
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	90 _barrier_set = NULL;
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	91 _is_gc_active = false;
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	92 _total_collections = _total_full_collections = 0;
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	93 _gc_cause = _gc_lastcause = GCCause::_no_gc;
0 a61af66fc99e Initial load duke parents: diff changeset	94 NOT_PRODUCT(_promotion_failure_alot_count = 0;)
a61af66fc99e Initial load duke parents: diff changeset	95 NOT_PRODUCT(_promotion_failure_alot_gc_number = 0;)
a61af66fc99e Initial load duke parents: diff changeset	96
a61af66fc99e Initial load duke parents: diff changeset	97 if (UsePerfData) {
a61af66fc99e Initial load duke parents: diff changeset	98 EXCEPTION_MARK;
a61af66fc99e Initial load duke parents: diff changeset	99
a61af66fc99e Initial load duke parents: diff changeset	100 // create the gc cause jvmstat counters
a61af66fc99e Initial load duke parents: diff changeset	101 _perf_gc_cause = PerfDataManager::create_string_variable(SUN_GC, "cause",
a61af66fc99e Initial load duke parents: diff changeset	102 80, GCCause::to_string(_gc_cause), CHECK);
a61af66fc99e Initial load duke parents: diff changeset	103
a61af66fc99e Initial load duke parents: diff changeset	104 _perf_gc_lastcause =
a61af66fc99e Initial load duke parents: diff changeset	105 PerfDataManager::create_string_variable(SUN_GC, "lastCause",
a61af66fc99e Initial load duke parents: diff changeset	106 80, GCCause::to_string(_gc_lastcause), CHECK);
a61af66fc99e Initial load duke parents: diff changeset	107 }
1166 7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	108 _defer_initial_card_mark = false; // strengthened by subclass in pre_initialize() below.
4872 aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	109 // Create the ring log
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	110 if (LogEvents) {
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	111 _gc_heap_log = new GCHeapLog();
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	112 } else {
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	113 _gc_heap_log = NULL;
aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4746 diff changeset	114 }
0 a61af66fc99e Initial load duke parents: diff changeset	115 }
a61af66fc99e Initial load duke parents: diff changeset	116
1166 7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	117 void CollectedHeap::pre_initialize() {
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	118 // Used for ReduceInitialCardMarks (when COMPILER2 is used);
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	119 // otherwise remains unused.
1548 15190cbcabe9 6953483: Typo related to ReduceInitialCardMarks leaves concurrent collectors vulnerable to heap corruption ysr parents: 1194 diff changeset	120 #ifdef COMPILER2
1194 34fb2662f6c2 6920090: G1: Disable ReduceInitialCardMarks at least until 6920109 is fixed ysr parents: 1166 diff changeset	121 _defer_initial_card_mark = ReduceInitialCardMarks && can_elide_tlab_store_barriers()
34fb2662f6c2 6920090: G1: Disable ReduceInitialCardMarks at least until 6920109 is fixed ysr parents: 1166 diff changeset	122 && (DeferInitialCardMark \|\| card_mark_must_follow_store());
1166 7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	123 #else
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	124 assert(_defer_initial_card_mark == false, "Who would set it?");
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	125 #endif
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	126 }
0 a61af66fc99e Initial load duke parents: diff changeset	127
a61af66fc99e Initial load duke parents: diff changeset	128 #ifndef PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	129 void CollectedHeap::check_for_bad_heap_word_value(HeapWord* addr, size_t size) {
a61af66fc99e Initial load duke parents: diff changeset	130 if (CheckMemoryInitialization && ZapUnusedHeapArea) {
a61af66fc99e Initial load duke parents: diff changeset	131 for (size_t slot = 0; slot < size; slot += 1) {
a61af66fc99e Initial load duke parents: diff changeset	132 assert(((intptr_t) (addr + slot)) != ((intptr_t) badHeapWordVal),
a61af66fc99e Initial load duke parents: diff changeset	133 "Found badHeapWordValue in post-allocation check");
a61af66fc99e Initial load duke parents: diff changeset	134 }
a61af66fc99e Initial load duke parents: diff changeset	135 }
a61af66fc99e Initial load duke parents: diff changeset	136 }
a61af66fc99e Initial load duke parents: diff changeset	137
2226 c5a923563727 6912621: iCMS: Error: assert(_markBitMap.isMarked(addr + 1),"Missing Printezis bit?") ysr parents: 1972 diff changeset	138 void CollectedHeap::check_for_non_bad_heap_word_value(HeapWord* addr, size_t size) {
0 a61af66fc99e Initial load duke parents: diff changeset	139 if (CheckMemoryInitialization && ZapUnusedHeapArea) {
a61af66fc99e Initial load duke parents: diff changeset	140 for (size_t slot = 0; slot < size; slot += 1) {
a61af66fc99e Initial load duke parents: diff changeset	141 assert(((intptr_t) (addr + slot)) == ((intptr_t) badHeapWordVal),
a61af66fc99e Initial load duke parents: diff changeset	142 "Found non badHeapWordValue in pre-allocation check");
a61af66fc99e Initial load duke parents: diff changeset	143 }
a61af66fc99e Initial load duke parents: diff changeset	144 }
a61af66fc99e Initial load duke parents: diff changeset	145 }
a61af66fc99e Initial load duke parents: diff changeset	146 #endif // PRODUCT
a61af66fc99e Initial load duke parents: diff changeset	147
a61af66fc99e Initial load duke parents: diff changeset	148 #ifdef ASSERT
a61af66fc99e Initial load duke parents: diff changeset	149 void CollectedHeap::check_for_valid_allocation_state() {
a61af66fc99e Initial load duke parents: diff changeset	150 Thread *thread = Thread::current();
a61af66fc99e Initial load duke parents: diff changeset	151 // How to choose between a pending exception and a potential
a61af66fc99e Initial load duke parents: diff changeset	152 // OutOfMemoryError? Don't allow pending exceptions.
a61af66fc99e Initial load duke parents: diff changeset	153 // This is a VM policy failure, so how do we exhaustively test it?
a61af66fc99e Initial load duke parents: diff changeset	154 assert(!thread->has_pending_exception(),
a61af66fc99e Initial load duke parents: diff changeset	155 "shouldn't be allocating with pending exception");
a61af66fc99e Initial load duke parents: diff changeset	156 if (StrictSafepointChecks) {
a61af66fc99e Initial load duke parents: diff changeset	157 assert(thread->allow_allocation(),
a61af66fc99e Initial load duke parents: diff changeset	158 "Allocation done by thread for which allocation is blocked "
a61af66fc99e Initial load duke parents: diff changeset	159 "by No_Allocation_Verifier!");
a61af66fc99e Initial load duke parents: diff changeset	160 // Allocation of an oop can always invoke a safepoint,
a61af66fc99e Initial load duke parents: diff changeset	161 // hence, the true argument
a61af66fc99e Initial load duke parents: diff changeset	162 thread->check_for_valid_safepoint_state(true);
a61af66fc99e Initial load duke parents: diff changeset	163 }
a61af66fc99e Initial load duke parents: diff changeset	164 }
a61af66fc99e Initial load duke parents: diff changeset	165 #endif
a61af66fc99e Initial load duke parents: diff changeset	166
a61af66fc99e Initial load duke parents: diff changeset	167 HeapWord* CollectedHeap::allocate_from_tlab_slow(Thread* thread, size_t size) {
a61af66fc99e Initial load duke parents: diff changeset	168
a61af66fc99e Initial load duke parents: diff changeset	169 // Retain tlab and allocate object in shared space if
a61af66fc99e Initial load duke parents: diff changeset	170 // the amount free in the tlab is too large to discard.
a61af66fc99e Initial load duke parents: diff changeset	171 if (thread->tlab().free() > thread->tlab().refill_waste_limit()) {
a61af66fc99e Initial load duke parents: diff changeset	172 thread->tlab().record_slow_allocation(size);
a61af66fc99e Initial load duke parents: diff changeset	173 return NULL;
a61af66fc99e Initial load duke parents: diff changeset	174 }
a61af66fc99e Initial load duke parents: diff changeset	175
a61af66fc99e Initial load duke parents: diff changeset	176 // Discard tlab and allocate a new one.
a61af66fc99e Initial load duke parents: diff changeset	177 // To minimize fragmentation, the last TLAB may be smaller than the rest.
a61af66fc99e Initial load duke parents: diff changeset	178 size_t new_tlab_size = thread->tlab().compute_size(size);
a61af66fc99e Initial load duke parents: diff changeset	179
a61af66fc99e Initial load duke parents: diff changeset	180 thread->tlab().clear_before_allocation();
a61af66fc99e Initial load duke parents: diff changeset	181
a61af66fc99e Initial load duke parents: diff changeset	182 if (new_tlab_size == 0) {
a61af66fc99e Initial load duke parents: diff changeset	183 return NULL;
a61af66fc99e Initial load duke parents: diff changeset	184 }
a61af66fc99e Initial load duke parents: diff changeset	185
a61af66fc99e Initial load duke parents: diff changeset	186 // Allocate a new TLAB...
a61af66fc99e Initial load duke parents: diff changeset	187 HeapWord* obj = Universe::heap()->allocate_new_tlab(new_tlab_size);
a61af66fc99e Initial load duke parents: diff changeset	188 if (obj == NULL) {
a61af66fc99e Initial load duke parents: diff changeset	189 return NULL;
a61af66fc99e Initial load duke parents: diff changeset	190 }
a61af66fc99e Initial load duke parents: diff changeset	191 if (ZeroTLAB) {
a61af66fc99e Initial load duke parents: diff changeset	192 // ..and clear it.
a61af66fc99e Initial load duke parents: diff changeset	193 Copy::zero_to_words(obj, new_tlab_size);
a61af66fc99e Initial load duke parents: diff changeset	194 } else {
3892 baf763f388e6 7059037: Use BIS for zeroing on T4 kvn parents: 2426 diff changeset	195 // ...and zap just allocated object.
baf763f388e6 7059037: Use BIS for zeroing on T4 kvn parents: 2426 diff changeset	196 #ifdef ASSERT
baf763f388e6 7059037: Use BIS for zeroing on T4 kvn parents: 2426 diff changeset	197 // Skip mangling the space corresponding to the object header to
baf763f388e6 7059037: Use BIS for zeroing on T4 kvn parents: 2426 diff changeset	198 // ensure that the returned space is not considered parsable by
baf763f388e6 7059037: Use BIS for zeroing on T4 kvn parents: 2426 diff changeset	199 // any concurrent GC thread.
baf763f388e6 7059037: Use BIS for zeroing on T4 kvn parents: 2426 diff changeset	200 size_t hdr_size = oopDesc::header_size();
baf763f388e6 7059037: Use BIS for zeroing on T4 kvn parents: 2426 diff changeset	201 Copy::fill_to_words(obj + hdr_size, new_tlab_size - hdr_size, badHeapWordVal);
baf763f388e6 7059037: Use BIS for zeroing on T4 kvn parents: 2426 diff changeset	202 #endif // ASSERT
0 a61af66fc99e Initial load duke parents: diff changeset	203 }
a61af66fc99e Initial load duke parents: diff changeset	204 thread->tlab().fill(obj, obj + size, new_tlab_size);
a61af66fc99e Initial load duke parents: diff changeset	205 return obj;
a61af66fc99e Initial load duke parents: diff changeset	206 }
a61af66fc99e Initial load duke parents: diff changeset	207
1027 39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	208 void CollectedHeap::flush_deferred_store_barrier(JavaThread* thread) {
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	209 MemRegion deferred = thread->deferred_card_mark();
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	210 if (!deferred.is_empty()) {
1166 7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	211 assert(_defer_initial_card_mark, "Otherwise should be empty");
1027 39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	212 {
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	213 // Verify that the storage points to a parsable object in heap
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	214 DEBUG_ONLY(oop old_obj = oop(deferred.start());)
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	215 assert(is_in(old_obj), "Not in allocated heap");
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	216 assert(!can_elide_initializing_store_barrier(old_obj),
1166 7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	217 "Else should have been filtered in new_store_pre_barrier()");
1027 39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	218 assert(!is_in_permanent(old_obj), "Sanity: not expected");
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	219 assert(old_obj->is_oop(true), "Not an oop");
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	220 assert(old_obj->is_parsable(), "Will not be concurrently parsable");
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	221 assert(deferred.word_size() == (size_t)(old_obj->size()),
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	222 "Mismatch: multiple objects?");
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	223 }
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	224 BarrierSet* bs = barrier_set();
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	225 assert(bs->has_write_region_opt(), "No write_region() on BarrierSet");
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	226 bs->write_region(deferred);
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	227 // "Clear" the deferred_card_mark field
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	228 thread->set_deferred_card_mark(MemRegion());
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	229 }
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	230 assert(thread->deferred_card_mark().is_empty(), "invariant");
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	231 }
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	232
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	233 // Helper for ReduceInitialCardMarks. For performance,
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	234 // compiled code may elide card-marks for initializing stores
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	235 // to a newly allocated object along the fast-path. We
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	236 // compensate for such elided card-marks as follows:
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	237 // (a) Generational, non-concurrent collectors, such as
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	238 // GenCollectedHeap(ParNew,DefNew,Tenured) and
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	239 // ParallelScavengeHeap(ParallelGC, ParallelOldGC)
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	240 // need the card-mark if and only if the region is
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	241 // in the old gen, and do not care if the card-mark
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	242 // succeeds or precedes the initializing stores themselves,
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	243 // so long as the card-mark is completed before the next
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	244 // scavenge. For all these cases, we can do a card mark
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	245 // at the point at which we do a slow path allocation
1166 7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	246 // in the old gen, i.e. in this call.
1027 39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	247 // (b) GenCollectedHeap(ConcurrentMarkSweepGeneration) requires
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	248 // in addition that the card-mark for an old gen allocated
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	249 // object strictly follow any associated initializing stores.
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	250 // In these cases, the memRegion remembered below is
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	251 // used to card-mark the entire region either just before the next
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	252 // slow-path allocation by this thread or just before the next scavenge or
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	253 // CMS-associated safepoint, whichever of these events happens first.
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	254 // (The implicit assumption is that the object has been fully
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	255 // initialized by this point, a fact that we assert when doing the
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	256 // card-mark.)
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	257 // (c) G1CollectedHeap(G1) uses two kinds of write barriers. When a
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	258 // G1 concurrent marking is in progress an SATB (pre-write-)barrier is
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	259 // is used to remember the pre-value of any store. Initializing
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	260 // stores will not need this barrier, so we need not worry about
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	261 // compensating for the missing pre-barrier here. Turning now
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	262 // to the post-barrier, we note that G1 needs a RS update barrier
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	263 // which simply enqueues a (sequence of) dirty cards which may
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	264 // optionally be refined by the concurrent update threads. Note
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	265 // that this barrier need only be applied to a non-young write,
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	266 // but, like in CMS, because of the presence of concurrent refinement
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	267 // (much like CMS' precleaning), must strictly follow the oop-store.
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	268 // Thus, using the same protocol for maintaining the intended
1166 7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	269 // invariants turns out, serendepitously, to be the same for both
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	270 // G1 and CMS.
1027 39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	271 //
1166 7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	272 // For any future collector, this code should be reexamined with
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	273 // that specific collector in mind, and the documentation above suitably
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	274 // extended and updated.
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	275 oop CollectedHeap::new_store_pre_barrier(JavaThread* thread, oop new_obj) {
1027 39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	276 // If a previous card-mark was deferred, flush it now.
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	277 flush_deferred_store_barrier(thread);
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	278 if (can_elide_initializing_store_barrier(new_obj)) {
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	279 // The deferred_card_mark region should be empty
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	280 // following the flush above.
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	281 assert(thread->deferred_card_mark().is_empty(), "Error");
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	282 } else {
1166 7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	283 MemRegion mr((HeapWord*)new_obj, new_obj->size());
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	284 assert(!mr.is_empty(), "Error");
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	285 if (_defer_initial_card_mark) {
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	286 // Defer the card mark
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	287 thread->set_deferred_card_mark(mr);
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	288 } else {
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	289 // Do the card mark
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	290 BarrierSet* bs = barrier_set();
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	291 assert(bs->has_write_region_opt(), "No write_region() on BarrierSet");
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	292 bs->write_region(mr);
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	293 }
1027 39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	294 }
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	295 return new_obj;
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	296 }
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 628 diff changeset	297
481 7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	298 size_t CollectedHeap::filler_array_hdr_size() {
1571 2d127394260e 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb kvn parents: 1549 diff changeset	299 return size_t(align_object_offset(arrayOopDesc::header_size(T_INT))); // align to Long
481 7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	300 }
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	301
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	302 size_t CollectedHeap::filler_array_min_size() {
1571 2d127394260e 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb kvn parents: 1549 diff changeset	303 return align_object_size(filler_array_hdr_size()); // align to MinObjAlignment
481 7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	304 }
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	305
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	306 size_t CollectedHeap::filler_array_max_size() {
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	307 return _filler_array_max_size;
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	308 }
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	309
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	310 #ifdef ASSERT
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	311 void CollectedHeap::fill_args_check(HeapWord* start, size_t words)
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	312 {
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	313 assert(words >= min_fill_size(), "too small to fill");
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	314 assert(words % MinObjAlignment == 0, "unaligned size");
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	315 assert(Universe::heap()->is_in_reserved(start), "not in heap");
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	316 assert(Universe::heap()->is_in_reserved(start + words - 1), "not in heap");
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	317 }
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	318
1165 2dd52dea6d28 6902115: G1:assert(ignore_max_completed\|\|thread->is_Java_thread()\|\|SafepointSynchronize::is_at_safepoint()) johnc parents: 1142 diff changeset	319 void CollectedHeap::zap_filler_array(HeapWord* start, size_t words, bool zap)
481 7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	320 {
1165 2dd52dea6d28 6902115: G1:assert(ignore_max_completed\|\|thread->is_Java_thread()\|\|SafepointSynchronize::is_at_safepoint()) johnc parents: 1142 diff changeset	321 if (ZapFillerObjects && zap) {
481 7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	322 Copy::fill_to_words(start + filler_array_hdr_size(),
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	323 words - filler_array_hdr_size(), 0XDEAFBABE);
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	324 }
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	325 }
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	326 #endif // ASSERT
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	327
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	328 void
1165 2dd52dea6d28 6902115: G1:assert(ignore_max_completed\|\|thread->is_Java_thread()\|\|SafepointSynchronize::is_at_safepoint()) johnc parents: 1142 diff changeset	329 CollectedHeap::fill_with_array(HeapWord* start, size_t words, bool zap)
481 7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	330 {
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	331 assert(words >= filler_array_min_size(), "too small for an array");
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	332 assert(words <= filler_array_max_size(), "too big for a single object");
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	333
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	334 const size_t payload_size = words - filler_array_hdr_size();
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	335 const size_t len = payload_size * HeapWordSize / sizeof(jint);
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	336
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	337 // Set the length first for concurrent GC.
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	338 ((arrayOop)start)->set_length((int)len);
494 d593294016c3 6786195: many nsk.monitoring tests fail with -server -Xcomp jcoomes parents: 481 diff changeset	339 post_allocation_setup_common(Universe::intArrayKlassObj(), start, words);
1165 2dd52dea6d28 6902115: G1:assert(ignore_max_completed\|\|thread->is_Java_thread()\|\|SafepointSynchronize::is_at_safepoint()) johnc parents: 1142 diff changeset	340 DEBUG_ONLY(zap_filler_array(start, words, zap);)
481 7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	341 }
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	342
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	343 void
1165 2dd52dea6d28 6902115: G1:assert(ignore_max_completed\|\|thread->is_Java_thread()\|\|SafepointSynchronize::is_at_safepoint()) johnc parents: 1142 diff changeset	344 CollectedHeap::fill_with_object_impl(HeapWord* start, size_t words, bool zap)
481 7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	345 {
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	346 assert(words <= filler_array_max_size(), "too big for a single object");
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	347
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	348 if (words >= filler_array_min_size()) {
1165 2dd52dea6d28 6902115: G1:assert(ignore_max_completed\|\|thread->is_Java_thread()\|\|SafepointSynchronize::is_at_safepoint()) johnc parents: 1142 diff changeset	349 fill_with_array(start, words, zap);
481 7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	350 } else if (words > 0) {
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	351 assert(words == min_fill_size(), "unaligned size");
1142 4ce7240d622c 6914300: ciEnv should export all well known classes never parents: 1027 diff changeset	352 post_allocation_setup_common(SystemDictionary::Object_klass(), start,
481 7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	353 words);
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	354 }
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	355 }
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	356
1165 2dd52dea6d28 6902115: G1:assert(ignore_max_completed\|\|thread->is_Java_thread()\|\|SafepointSynchronize::is_at_safepoint()) johnc parents: 1142 diff changeset	357 void CollectedHeap::fill_with_object(HeapWord* start, size_t words, bool zap)
481 7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	358 {
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	359 DEBUG_ONLY(fill_args_check(start, words);)
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	360 HandleMark hm; // Free handles before leaving.
1165 2dd52dea6d28 6902115: G1:assert(ignore_max_completed\|\|thread->is_Java_thread()\|\|SafepointSynchronize::is_at_safepoint()) johnc parents: 1142 diff changeset	361 fill_with_object_impl(start, words, zap);
481 7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	362 }
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	363
1165 2dd52dea6d28 6902115: G1:assert(ignore_max_completed\|\|thread->is_Java_thread()\|\|SafepointSynchronize::is_at_safepoint()) johnc parents: 1142 diff changeset	364 void CollectedHeap::fill_with_objects(HeapWord* start, size_t words, bool zap)
481 7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	365 {
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	366 DEBUG_ONLY(fill_args_check(start, words);)
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	367 HandleMark hm; // Free handles before leaving.
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	368
1549 1634cec09505 6953952: collectedHeap.cpp should use #ifdef _LP64 not LP64 ysr parents: 1548 diff changeset	369 #ifdef _LP64
481 7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	370 // A single array can fill ~8G, so multiple objects are needed only in 64-bit.
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	371 // First fill with arrays, ensuring that any remaining space is big enough to
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	372 // fill. The remainder is filled with a single object.
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	373 const size_t min = min_fill_size();
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	374 const size_t max = filler_array_max_size();
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	375 while (words > max) {
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	376 const size_t cur = words - max >= min ? max : max - min;
1165 2dd52dea6d28 6902115: G1:assert(ignore_max_completed\|\|thread->is_Java_thread()\|\|SafepointSynchronize::is_at_safepoint()) johnc parents: 1142 diff changeset	377 fill_with_array(start, cur, zap);
481 7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	378 start += cur;
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	379 words -= cur;
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	380 }
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	381 #endif
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	382
1165 2dd52dea6d28 6902115: G1:assert(ignore_max_completed\|\|thread->is_Java_thread()\|\|SafepointSynchronize::is_at_safepoint()) johnc parents: 1142 diff changeset	383 fill_with_object_impl(start, words, zap);
481 7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	384 }
7d7a7c599c17 6578152: fill_region_with_object has usability and safety issues jcoomes parents: 356 diff changeset	385
0 a61af66fc99e Initial load duke parents: diff changeset	386 HeapWord* CollectedHeap::allocate_new_tlab(size_t size) {
a61af66fc99e Initial load duke parents: diff changeset	387 guarantee(false, "thread-local allocation buffers not supported");
a61af66fc99e Initial load duke parents: diff changeset	388 return NULL;
a61af66fc99e Initial load duke parents: diff changeset	389 }
a61af66fc99e Initial load duke parents: diff changeset	390
a61af66fc99e Initial load duke parents: diff changeset	391 void CollectedHeap::ensure_parsability(bool retire_tlabs) {
a61af66fc99e Initial load duke parents: diff changeset	392 // The second disjunct in the assertion below makes a concession
a61af66fc99e Initial load duke parents: diff changeset	393 // for the start-up verification done while the VM is being
a61af66fc99e Initial load duke parents: diff changeset	394 // created. Callers be careful that you know that mutators
a61af66fc99e Initial load duke parents: diff changeset	395 // aren't going to interfere -- for instance, this is permissible
a61af66fc99e Initial load duke parents: diff changeset	396 // if we are still single-threaded and have either not yet
a61af66fc99e Initial load duke parents: diff changeset	397 // started allocating (nothing much to verify) or we have
a61af66fc99e Initial load duke parents: diff changeset	398 // started allocating but are now a full-fledged JavaThread
a61af66fc99e Initial load duke parents: diff changeset	399 // (and have thus made our TLAB's) available for filling.
a61af66fc99e Initial load duke parents: diff changeset	400 assert(SafepointSynchronize::is_at_safepoint() \|\|
a61af66fc99e Initial load duke parents: diff changeset	401 !is_init_completed(),
a61af66fc99e Initial load duke parents: diff changeset	402 "Should only be called at a safepoint or at start-up"
a61af66fc99e Initial load duke parents: diff changeset	403 " otherwise concurrent mutator activity may make heap "
a61af66fc99e Initial load duke parents: diff changeset	404 " unparsable again");
1166 7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	405 const bool use_tlab = UseTLAB;
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	406 const bool deferred = _defer_initial_card_mark;
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	407 // The main thread starts allocating via a TLAB even before it
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	408 // has added itself to the threads list at vm boot-up.
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	409 assert(!use_tlab \|\| Threads::first() != NULL,
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	410 "Attempt to fill tlabs before main thread has been added"
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	411 " to threads list is doomed to failure!");
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	412 for (JavaThread *thread = Threads::first(); thread; thread = thread->next()) {
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	413 if (use_tlab) thread->tlab().make_parsable(retire_tlabs);
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	414 #ifdef COMPILER2
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	415 // The deferred store barriers must all have been flushed to the
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	416 // card-table (or other remembered set structure) before GC starts
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	417 // processing the card-table (or other remembered set).
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	418 if (deferred) flush_deferred_store_barrier(thread);
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	419 #else
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	420 assert(!deferred, "Should be false");
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	421 assert(thread->deferred_card_mark().is_empty(), "Should be empty");
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1165 diff changeset	422 #endif
0 a61af66fc99e Initial load duke parents: diff changeset	423 }
a61af66fc99e Initial load duke parents: diff changeset	424 }
a61af66fc99e Initial load duke parents: diff changeset	425
a61af66fc99e Initial load duke parents: diff changeset	426 void CollectedHeap::accumulate_statistics_all_tlabs() {
a61af66fc99e Initial load duke parents: diff changeset	427 if (UseTLAB) {
a61af66fc99e Initial load duke parents: diff changeset	428 assert(SafepointSynchronize::is_at_safepoint() \|\|
a61af66fc99e Initial load duke parents: diff changeset	429 !is_init_completed(),
a61af66fc99e Initial load duke parents: diff changeset	430 "should only accumulate statistics on tlabs at safepoint");
a61af66fc99e Initial load duke parents: diff changeset	431
a61af66fc99e Initial load duke parents: diff changeset	432 ThreadLocalAllocBuffer::accumulate_statistics_before_gc();
a61af66fc99e Initial load duke parents: diff changeset	433 }
a61af66fc99e Initial load duke parents: diff changeset	434 }
a61af66fc99e Initial load duke parents: diff changeset	435
a61af66fc99e Initial load duke parents: diff changeset	436 void CollectedHeap::resize_all_tlabs() {
a61af66fc99e Initial load duke parents: diff changeset	437 if (UseTLAB) {
a61af66fc99e Initial load duke parents: diff changeset	438 assert(SafepointSynchronize::is_at_safepoint() \|\|
a61af66fc99e Initial load duke parents: diff changeset	439 !is_init_completed(),
a61af66fc99e Initial load duke parents: diff changeset	440 "should only resize tlabs at safepoint");
a61af66fc99e Initial load duke parents: diff changeset	441
a61af66fc99e Initial load duke parents: diff changeset	442 ThreadLocalAllocBuffer::resize_all_tlabs();
a61af66fc99e Initial load duke parents: diff changeset	443 }
a61af66fc99e Initial load duke parents: diff changeset	444 }
615 c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 494 diff changeset	445
c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 494 diff changeset	446 void CollectedHeap::pre_full_gc_dump() {
c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 494 diff changeset	447 if (HeapDumpBeforeFullGC) {
3869 7f776886a215 6810861: G1: support -XX:+{PrintClassHistogram,HeapDump}{Before,After}FullGC ysr parents: 2426 diff changeset	448 TraceTime tt("Heap Dump (before full gc): ", PrintGCDetails, false, gclog_or_tty);
615 c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 494 diff changeset	449 // We are doing a "major" collection and a heap dump before
c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 494 diff changeset	450 // major collection has been requested.
c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 494 diff changeset	451 HeapDumper::dump_heap();
c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 494 diff changeset	452 }
c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 494 diff changeset	453 if (PrintClassHistogramBeforeFullGC) {
3869 7f776886a215 6810861: G1: support -XX:+{PrintClassHistogram,HeapDump}{Before,After}FullGC ysr parents: 2426 diff changeset	454 TraceTime tt("Class Histogram (before full gc): ", PrintGCDetails, true, gclog_or_tty);
615 c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 494 diff changeset	455 VM_GC_HeapInspection inspector(gclog_or_tty, false /* ! full gc /, false / ! prologue */);
c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 494 diff changeset	456 inspector.doit();
c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 494 diff changeset	457 }
c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 494 diff changeset	458 }
c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 494 diff changeset	459
c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 494 diff changeset	460 void CollectedHeap::post_full_gc_dump() {
c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 494 diff changeset	461 if (HeapDumpAfterFullGC) {
3869 7f776886a215 6810861: G1: support -XX:+{PrintClassHistogram,HeapDump}{Before,After}FullGC ysr parents: 2426 diff changeset	462 TraceTime tt("Heap Dump (after full gc): ", PrintGCDetails, false, gclog_or_tty);
615 c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 494 diff changeset	463 HeapDumper::dump_heap();
c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 494 diff changeset	464 }
c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 494 diff changeset	465 if (PrintClassHistogramAfterFullGC) {
3869 7f776886a215 6810861: G1: support -XX:+{PrintClassHistogram,HeapDump}{Before,After}FullGC ysr parents: 2426 diff changeset	466 TraceTime tt("Class Histogram (after full gc): ", PrintGCDetails, true, gclog_or_tty);
615 c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 494 diff changeset	467 VM_GC_HeapInspection inspector(gclog_or_tty, false /* ! full gc /, false / ! prologue */);
c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 494 diff changeset	468 inspector.doit();
c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 494 diff changeset	469 }
c6c601a0f2d6 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC ysr parents: 494 diff changeset	470 }
4009 e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	471
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	472 oop CollectedHeap::Class_obj_allocate(KlassHandle klass, int size, KlassHandle real_klass, TRAPS) {
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	473 debug_only(check_for_valid_allocation_state());
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	474 assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed");
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	475 assert(size >= 0, "int won't convert to size_t");
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	476 HeapWord* obj;
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	477 if (JavaObjectsInPerm) {
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	478 obj = common_permanent_mem_allocate_init(size, CHECK_NULL);
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	479 } else {
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	480 assert(ScavengeRootsInCode > 0, "must be");
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	481 obj = common_mem_allocate_init(size, CHECK_NULL);
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	482 }
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	483 post_allocation_setup_common(klass, obj, size);
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	484 assert(Universe::is_bootstrapping() \|\|
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	485 !((oop)obj)->blueprint()->oop_is_array(), "must not be an array");
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	486 NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size));
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	487 oop mirror = (oop)obj;
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	488
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	489 java_lang_Class::set_oop_size(mirror, size);
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	490
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	491 // Setup indirections
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	492 if (!real_klass.is_null()) {
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	493 java_lang_Class::set_klass(mirror, real_klass());
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	494 real_klass->set_java_mirror(mirror);
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	495 }
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	496
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	497 instanceMirrorKlass* mk = instanceMirrorKlass::cast(mirror->klass());
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	498 assert(size == mk->instance_size(real_klass), "should have been set");
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	499
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	500 // notify jvmti and dtrace
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	501 post_allocation_notify(klass, (oop)obj);
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	502
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	503 return mirror;
e5928e7dab26 7098528: crash with java -XX:+ExtendedDTraceProbes never parents: 3960 diff changeset	504 }
4708 3c648b9ad052 7121373: Clean up CollectedHeap::is_in stefank parents: 4009 diff changeset	505
3c648b9ad052 7121373: Clean up CollectedHeap::is_in stefank parents: 4009 diff changeset	506 /////////////// Unit tests ///////////////
3c648b9ad052 7121373: Clean up CollectedHeap::is_in stefank parents: 4009 diff changeset	507
3c648b9ad052 7121373: Clean up CollectedHeap::is_in stefank parents: 4009 diff changeset	508 #ifndef PRODUCT
3c648b9ad052 7121373: Clean up CollectedHeap::is_in stefank parents: 4009 diff changeset	509 void CollectedHeap::test_is_in() {
3c648b9ad052 7121373: Clean up CollectedHeap::is_in stefank parents: 4009 diff changeset	510 CollectedHeap* heap = Universe::heap();
3c648b9ad052 7121373: Clean up CollectedHeap::is_in stefank parents: 4009 diff changeset	511
4746 b6a04c79ccbc 7125503: Compiling collectedHeap.cpp fails with -Werror=int-to-pointer-cast with g++ 4.6.1 stefank parents: 4708 diff changeset	512 uintptr_t epsilon = (uintptr_t) MinObjAlignment;
b6a04c79ccbc 7125503: Compiling collectedHeap.cpp fails with -Werror=int-to-pointer-cast with g++ 4.6.1 stefank parents: 4708 diff changeset	513 uintptr_t heap_start = (uintptr_t) heap->_reserved.start();
b6a04c79ccbc 7125503: Compiling collectedHeap.cpp fails with -Werror=int-to-pointer-cast with g++ 4.6.1 stefank parents: 4708 diff changeset	514 uintptr_t heap_end = (uintptr_t) heap->_reserved.end();
b6a04c79ccbc 7125503: Compiling collectedHeap.cpp fails with -Werror=int-to-pointer-cast with g++ 4.6.1 stefank parents: 4708 diff changeset	515
4708 3c648b9ad052 7121373: Clean up CollectedHeap::is_in stefank parents: 4009 diff changeset	516 // Test that NULL is not in the heap.
3c648b9ad052 7121373: Clean up CollectedHeap::is_in stefank parents: 4009 diff changeset	517 assert(!heap->is_in(NULL), "NULL is unexpectedly in the heap");
3c648b9ad052 7121373: Clean up CollectedHeap::is_in stefank parents: 4009 diff changeset	518
3c648b9ad052 7121373: Clean up CollectedHeap::is_in stefank parents: 4009 diff changeset	519 // Test that a pointer to before the heap start is reported as outside the heap.
4746 b6a04c79ccbc 7125503: Compiling collectedHeap.cpp fails with -Werror=int-to-pointer-cast with g++ 4.6.1 stefank parents: 4708 diff changeset	520 assert(heap_start >= ((uintptr_t)NULL + epsilon), "sanity");
b6a04c79ccbc 7125503: Compiling collectedHeap.cpp fails with -Werror=int-to-pointer-cast with g++ 4.6.1 stefank parents: 4708 diff changeset	521 void* before_heap = (void*)(heap_start - epsilon);
4708 3c648b9ad052 7121373: Clean up CollectedHeap::is_in stefank parents: 4009 diff changeset	522 assert(!heap->is_in(before_heap),
3c648b9ad052 7121373: Clean up CollectedHeap::is_in stefank parents: 4009 diff changeset	523 err_msg("before_heap: " PTR_FORMAT " is unexpectedly in the heap", before_heap));
3c648b9ad052 7121373: Clean up CollectedHeap::is_in stefank parents: 4009 diff changeset	524
3c648b9ad052 7121373: Clean up CollectedHeap::is_in stefank parents: 4009 diff changeset	525 // Test that a pointer to after the heap end is reported as outside the heap.
4746 b6a04c79ccbc 7125503: Compiling collectedHeap.cpp fails with -Werror=int-to-pointer-cast with g++ 4.6.1 stefank parents: 4708 diff changeset	526 assert(heap_end <= ((uintptr_t)-1 - epsilon), "sanity");
b6a04c79ccbc 7125503: Compiling collectedHeap.cpp fails with -Werror=int-to-pointer-cast with g++ 4.6.1 stefank parents: 4708 diff changeset	527 void* after_heap = (void*)(heap_end + epsilon);
4708 3c648b9ad052 7121373: Clean up CollectedHeap::is_in stefank parents: 4009 diff changeset	528 assert(!heap->is_in(after_heap),
3c648b9ad052 7121373: Clean up CollectedHeap::is_in stefank parents: 4009 diff changeset	529 err_msg("after_heap: " PTR_FORMAT " is unexpectedly in the heap", after_heap));
3c648b9ad052 7121373: Clean up CollectedHeap::is_in stefank parents: 4009 diff changeset	530 }
3c648b9ad052 7121373: Clean up CollectedHeap::is_in stefank parents: 4009 diff changeset	531 #endif

Mercurial > hg > truffle

annotate src/share/vm/gc_interface/collectedHeap.cpp @ 4872:aa3d708d67c4