Mercurial > hg > truffle
annotate src/share/vm/gc_interface/collectedHeap.cpp @ 5130:ab038e0d6b43
Merge
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Wed, 21 Mar 2012 11:28:22 +0100 |
parents | 09d00c18e323 |
children | cc74fa5a91a9 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/systemDictionary.hpp" | |
27 #include "gc_implementation/shared/vmGCOperations.hpp" | |
28 #include "gc_interface/collectedHeap.hpp" | |
29 #include "gc_interface/collectedHeap.inline.hpp" | |
30 #include "oops/oop.inline.hpp" | |
4009 | 31 #include "oops/instanceMirrorKlass.hpp" |
1972 | 32 #include "runtime/init.hpp" |
33 #include "services/heapDumper.hpp" | |
34 #ifdef TARGET_OS_FAMILY_linux | |
35 # include "thread_linux.inline.hpp" | |
36 #endif | |
37 #ifdef TARGET_OS_FAMILY_solaris | |
38 # include "thread_solaris.inline.hpp" | |
39 #endif | |
40 #ifdef TARGET_OS_FAMILY_windows | |
41 # include "thread_windows.inline.hpp" | |
42 #endif | |
3960 | 43 #ifdef TARGET_OS_FAMILY_bsd |
44 # include "thread_bsd.inline.hpp" | |
45 #endif | |
0 | 46 |
47 | |
48 #ifdef ASSERT | |
49 int CollectedHeap::_fire_out_of_memory_count = 0; | |
50 #endif | |
51 | |
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52 size_t CollectedHeap::_filler_array_max_size = 0; |
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53 |
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54 template <> |
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55 void EventLogBase<GCMessage>::print(outputStream* st, GCMessage& m) { |
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56 st->print_cr("GC heap %s", m.is_before ? "before" : "after"); |
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57 st->print_raw(m); |
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58 } |
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59 |
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60 void GCHeapLog::log_heap(bool before) { |
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61 if (!should_log()) { |
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62 return; |
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63 } |
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64 |
4944 | 65 double timestamp = fetch_timestamp(); |
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66 MutexLockerEx ml(&_mutex, Mutex::_no_safepoint_check_flag); |
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67 int index = compute_log_index(); |
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68 _records[index].thread = NULL; // Its the GC thread so it's not that interesting. |
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69 _records[index].timestamp = timestamp; |
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70 _records[index].data.is_before = before; |
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71 stringStream st(_records[index].data.buffer(), _records[index].data.size()); |
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72 if (before) { |
4944 | 73 Universe::print_heap_before_gc(&st, true); |
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74 } else { |
4944 | 75 Universe::print_heap_after_gc(&st, true); |
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76 } |
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77 } |
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78 |
0 | 79 // Memory state functions. |
80 | |
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81 |
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82 CollectedHeap::CollectedHeap() : _n_par_threads(0) |
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83 |
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84 { |
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85 const size_t max_len = size_t(arrayOopDesc::max_array_length(T_INT)); |
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86 const size_t elements_per_word = HeapWordSize / sizeof(jint); |
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87 _filler_array_max_size = align_object_size(filler_array_hdr_size() + |
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88 max_len * elements_per_word); |
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89 |
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90 _barrier_set = NULL; |
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91 _is_gc_active = false; |
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92 _total_collections = _total_full_collections = 0; |
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93 _gc_cause = _gc_lastcause = GCCause::_no_gc; |
0 | 94 NOT_PRODUCT(_promotion_failure_alot_count = 0;) |
95 NOT_PRODUCT(_promotion_failure_alot_gc_number = 0;) | |
96 | |
97 if (UsePerfData) { | |
98 EXCEPTION_MARK; | |
99 | |
100 // create the gc cause jvmstat counters | |
101 _perf_gc_cause = PerfDataManager::create_string_variable(SUN_GC, "cause", | |
102 80, GCCause::to_string(_gc_cause), CHECK); | |
103 | |
104 _perf_gc_lastcause = | |
105 PerfDataManager::create_string_variable(SUN_GC, "lastCause", | |
106 80, GCCause::to_string(_gc_lastcause), CHECK); | |
107 } | |
1166 | 108 _defer_initial_card_mark = false; // strengthened by subclass in pre_initialize() below. |
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109 // Create the ring log |
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110 if (LogEvents) { |
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111 _gc_heap_log = new GCHeapLog(); |
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112 } else { |
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113 _gc_heap_log = NULL; |
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114 } |
0 | 115 } |
116 | |
1166 | 117 void CollectedHeap::pre_initialize() { |
118 // Used for ReduceInitialCardMarks (when COMPILER2 is used); | |
119 // otherwise remains unused. | |
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120 #ifdef COMPILER2 |
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121 _defer_initial_card_mark = ReduceInitialCardMarks && can_elide_tlab_store_barriers() |
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122 && (DeferInitialCardMark || card_mark_must_follow_store()); |
1166 | 123 #else |
124 assert(_defer_initial_card_mark == false, "Who would set it?"); | |
125 #endif | |
126 } | |
0 | 127 |
128 #ifndef PRODUCT | |
129 void CollectedHeap::check_for_bad_heap_word_value(HeapWord* addr, size_t size) { | |
130 if (CheckMemoryInitialization && ZapUnusedHeapArea) { | |
131 for (size_t slot = 0; slot < size; slot += 1) { | |
132 assert((*(intptr_t*) (addr + slot)) != ((intptr_t) badHeapWordVal), | |
133 "Found badHeapWordValue in post-allocation check"); | |
134 } | |
135 } | |
136 } | |
137 | |
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138 void CollectedHeap::check_for_non_bad_heap_word_value(HeapWord* addr, size_t size) { |
0 | 139 if (CheckMemoryInitialization && ZapUnusedHeapArea) { |
140 for (size_t slot = 0; slot < size; slot += 1) { | |
141 assert((*(intptr_t*) (addr + slot)) == ((intptr_t) badHeapWordVal), | |
142 "Found non badHeapWordValue in pre-allocation check"); | |
143 } | |
144 } | |
145 } | |
146 #endif // PRODUCT | |
147 | |
148 #ifdef ASSERT | |
149 void CollectedHeap::check_for_valid_allocation_state() { | |
150 Thread *thread = Thread::current(); | |
151 // How to choose between a pending exception and a potential | |
152 // OutOfMemoryError? Don't allow pending exceptions. | |
153 // This is a VM policy failure, so how do we exhaustively test it? | |
154 assert(!thread->has_pending_exception(), | |
155 "shouldn't be allocating with pending exception"); | |
156 if (StrictSafepointChecks) { | |
157 assert(thread->allow_allocation(), | |
158 "Allocation done by thread for which allocation is blocked " | |
159 "by No_Allocation_Verifier!"); | |
160 // Allocation of an oop can always invoke a safepoint, | |
161 // hence, the true argument | |
162 thread->check_for_valid_safepoint_state(true); | |
163 } | |
164 } | |
165 #endif | |
166 | |
167 HeapWord* CollectedHeap::allocate_from_tlab_slow(Thread* thread, size_t size) { | |
168 | |
169 // Retain tlab and allocate object in shared space if | |
170 // the amount free in the tlab is too large to discard. | |
171 if (thread->tlab().free() > thread->tlab().refill_waste_limit()) { | |
172 thread->tlab().record_slow_allocation(size); | |
173 return NULL; | |
174 } | |
175 | |
176 // Discard tlab and allocate a new one. | |
177 // To minimize fragmentation, the last TLAB may be smaller than the rest. | |
178 size_t new_tlab_size = thread->tlab().compute_size(size); | |
179 | |
180 thread->tlab().clear_before_allocation(); | |
181 | |
182 if (new_tlab_size == 0) { | |
183 return NULL; | |
184 } | |
185 | |
186 // Allocate a new TLAB... | |
187 HeapWord* obj = Universe::heap()->allocate_new_tlab(new_tlab_size); | |
188 if (obj == NULL) { | |
189 return NULL; | |
190 } | |
191 if (ZeroTLAB) { | |
192 // ..and clear it. | |
193 Copy::zero_to_words(obj, new_tlab_size); | |
194 } else { | |
3892 | 195 // ...and zap just allocated object. |
196 #ifdef ASSERT | |
197 // Skip mangling the space corresponding to the object header to | |
198 // ensure that the returned space is not considered parsable by | |
199 // any concurrent GC thread. | |
200 size_t hdr_size = oopDesc::header_size(); | |
201 Copy::fill_to_words(obj + hdr_size, new_tlab_size - hdr_size, badHeapWordVal); | |
202 #endif // ASSERT | |
0 | 203 } |
204 thread->tlab().fill(obj, obj + size, new_tlab_size); | |
205 return obj; | |
206 } | |
207 | |
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208 void CollectedHeap::flush_deferred_store_barrier(JavaThread* thread) { |
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209 MemRegion deferred = thread->deferred_card_mark(); |
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210 if (!deferred.is_empty()) { |
1166 | 211 assert(_defer_initial_card_mark, "Otherwise should be empty"); |
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212 { |
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213 // Verify that the storage points to a parsable object in heap |
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214 DEBUG_ONLY(oop old_obj = oop(deferred.start());) |
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215 assert(is_in(old_obj), "Not in allocated heap"); |
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216 assert(!can_elide_initializing_store_barrier(old_obj), |
1166 | 217 "Else should have been filtered in new_store_pre_barrier()"); |
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218 assert(!is_in_permanent(old_obj), "Sanity: not expected"); |
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219 assert(old_obj->is_oop(true), "Not an oop"); |
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220 assert(old_obj->is_parsable(), "Will not be concurrently parsable"); |
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221 assert(deferred.word_size() == (size_t)(old_obj->size()), |
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222 "Mismatch: multiple objects?"); |
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223 } |
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224 BarrierSet* bs = barrier_set(); |
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225 assert(bs->has_write_region_opt(), "No write_region() on BarrierSet"); |
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226 bs->write_region(deferred); |
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227 // "Clear" the deferred_card_mark field |
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228 thread->set_deferred_card_mark(MemRegion()); |
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229 } |
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230 assert(thread->deferred_card_mark().is_empty(), "invariant"); |
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231 } |
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232 |
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233 // Helper for ReduceInitialCardMarks. For performance, |
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234 // compiled code may elide card-marks for initializing stores |
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235 // to a newly allocated object along the fast-path. We |
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236 // compensate for such elided card-marks as follows: |
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237 // (a) Generational, non-concurrent collectors, such as |
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238 // GenCollectedHeap(ParNew,DefNew,Tenured) and |
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239 // ParallelScavengeHeap(ParallelGC, ParallelOldGC) |
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240 // need the card-mark if and only if the region is |
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241 // in the old gen, and do not care if the card-mark |
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242 // succeeds or precedes the initializing stores themselves, |
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243 // so long as the card-mark is completed before the next |
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244 // scavenge. For all these cases, we can do a card mark |
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245 // at the point at which we do a slow path allocation |
1166 | 246 // in the old gen, i.e. in this call. |
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247 // (b) GenCollectedHeap(ConcurrentMarkSweepGeneration) requires |
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248 // in addition that the card-mark for an old gen allocated |
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249 // object strictly follow any associated initializing stores. |
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250 // In these cases, the memRegion remembered below is |
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251 // used to card-mark the entire region either just before the next |
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252 // slow-path allocation by this thread or just before the next scavenge or |
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253 // CMS-associated safepoint, whichever of these events happens first. |
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254 // (The implicit assumption is that the object has been fully |
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255 // initialized by this point, a fact that we assert when doing the |
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256 // card-mark.) |
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257 // (c) G1CollectedHeap(G1) uses two kinds of write barriers. When a |
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258 // G1 concurrent marking is in progress an SATB (pre-write-)barrier is |
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259 // is used to remember the pre-value of any store. Initializing |
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260 // stores will not need this barrier, so we need not worry about |
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261 // compensating for the missing pre-barrier here. Turning now |
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262 // to the post-barrier, we note that G1 needs a RS update barrier |
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263 // which simply enqueues a (sequence of) dirty cards which may |
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264 // optionally be refined by the concurrent update threads. Note |
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265 // that this barrier need only be applied to a non-young write, |
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266 // but, like in CMS, because of the presence of concurrent refinement |
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267 // (much like CMS' precleaning), must strictly follow the oop-store. |
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268 // Thus, using the same protocol for maintaining the intended |
1166 | 269 // invariants turns out, serendepitously, to be the same for both |
270 // G1 and CMS. | |
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271 // |
1166 | 272 // For any future collector, this code should be reexamined with |
273 // that specific collector in mind, and the documentation above suitably | |
274 // extended and updated. | |
275 oop CollectedHeap::new_store_pre_barrier(JavaThread* thread, oop new_obj) { | |
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276 // If a previous card-mark was deferred, flush it now. |
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277 flush_deferred_store_barrier(thread); |
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278 if (can_elide_initializing_store_barrier(new_obj)) { |
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279 // The deferred_card_mark region should be empty |
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280 // following the flush above. |
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281 assert(thread->deferred_card_mark().is_empty(), "Error"); |
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282 } else { |
1166 | 283 MemRegion mr((HeapWord*)new_obj, new_obj->size()); |
284 assert(!mr.is_empty(), "Error"); | |
285 if (_defer_initial_card_mark) { | |
286 // Defer the card mark | |
287 thread->set_deferred_card_mark(mr); | |
288 } else { | |
289 // Do the card mark | |
290 BarrierSet* bs = barrier_set(); | |
291 assert(bs->has_write_region_opt(), "No write_region() on BarrierSet"); | |
292 bs->write_region(mr); | |
293 } | |
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294 } |
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295 return new_obj; |
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296 } |
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297 |
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298 size_t CollectedHeap::filler_array_hdr_size() { |
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299 return size_t(align_object_offset(arrayOopDesc::header_size(T_INT))); // align to Long |
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300 } |
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301 |
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302 size_t CollectedHeap::filler_array_min_size() { |
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303 return align_object_size(filler_array_hdr_size()); // align to MinObjAlignment |
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304 } |
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305 |
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306 size_t CollectedHeap::filler_array_max_size() { |
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307 return _filler_array_max_size; |
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308 } |
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309 |
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310 #ifdef ASSERT |
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311 void CollectedHeap::fill_args_check(HeapWord* start, size_t words) |
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312 { |
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313 assert(words >= min_fill_size(), "too small to fill"); |
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314 assert(words % MinObjAlignment == 0, "unaligned size"); |
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315 assert(Universe::heap()->is_in_reserved(start), "not in heap"); |
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316 assert(Universe::heap()->is_in_reserved(start + words - 1), "not in heap"); |
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317 } |
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318 |
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319 void CollectedHeap::zap_filler_array(HeapWord* start, size_t words, bool zap) |
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320 { |
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321 if (ZapFillerObjects && zap) { |
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322 Copy::fill_to_words(start + filler_array_hdr_size(), |
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323 words - filler_array_hdr_size(), 0XDEAFBABE); |
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324 } |
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325 } |
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326 #endif // ASSERT |
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327 |
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328 void |
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329 CollectedHeap::fill_with_array(HeapWord* start, size_t words, bool zap) |
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330 { |
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331 assert(words >= filler_array_min_size(), "too small for an array"); |
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332 assert(words <= filler_array_max_size(), "too big for a single object"); |
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333 |
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334 const size_t payload_size = words - filler_array_hdr_size(); |
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335 const size_t len = payload_size * HeapWordSize / sizeof(jint); |
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336 |
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337 // Set the length first for concurrent GC. |
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338 ((arrayOop)start)->set_length((int)len); |
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339 post_allocation_setup_common(Universe::intArrayKlassObj(), start, words); |
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340 DEBUG_ONLY(zap_filler_array(start, words, zap);) |
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341 } |
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342 |
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343 void |
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344 CollectedHeap::fill_with_object_impl(HeapWord* start, size_t words, bool zap) |
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345 { |
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346 assert(words <= filler_array_max_size(), "too big for a single object"); |
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347 |
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348 if (words >= filler_array_min_size()) { |
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349 fill_with_array(start, words, zap); |
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350 } else if (words > 0) { |
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351 assert(words == min_fill_size(), "unaligned size"); |
1142 | 352 post_allocation_setup_common(SystemDictionary::Object_klass(), start, |
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353 words); |
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354 } |
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355 } |
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356 |
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357 void CollectedHeap::fill_with_object(HeapWord* start, size_t words, bool zap) |
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358 { |
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359 DEBUG_ONLY(fill_args_check(start, words);) |
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360 HandleMark hm; // Free handles before leaving. |
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361 fill_with_object_impl(start, words, zap); |
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362 } |
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363 |
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364 void CollectedHeap::fill_with_objects(HeapWord* start, size_t words, bool zap) |
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365 { |
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366 DEBUG_ONLY(fill_args_check(start, words);) |
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367 HandleMark hm; // Free handles before leaving. |
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368 |
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369 #ifdef _LP64 |
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370 // A single array can fill ~8G, so multiple objects are needed only in 64-bit. |
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371 // First fill with arrays, ensuring that any remaining space is big enough to |
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372 // fill. The remainder is filled with a single object. |
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373 const size_t min = min_fill_size(); |
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374 const size_t max = filler_array_max_size(); |
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375 while (words > max) { |
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376 const size_t cur = words - max >= min ? max : max - min; |
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377 fill_with_array(start, cur, zap); |
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378 start += cur; |
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379 words -= cur; |
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380 } |
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381 #endif |
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382 |
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383 fill_with_object_impl(start, words, zap); |
481
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384 } |
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385 |
0 | 386 HeapWord* CollectedHeap::allocate_new_tlab(size_t size) { |
387 guarantee(false, "thread-local allocation buffers not supported"); | |
388 return NULL; | |
389 } | |
390 | |
391 void CollectedHeap::ensure_parsability(bool retire_tlabs) { | |
392 // The second disjunct in the assertion below makes a concession | |
393 // for the start-up verification done while the VM is being | |
394 // created. Callers be careful that you know that mutators | |
395 // aren't going to interfere -- for instance, this is permissible | |
396 // if we are still single-threaded and have either not yet | |
397 // started allocating (nothing much to verify) or we have | |
398 // started allocating but are now a full-fledged JavaThread | |
399 // (and have thus made our TLAB's) available for filling. | |
400 assert(SafepointSynchronize::is_at_safepoint() || | |
401 !is_init_completed(), | |
402 "Should only be called at a safepoint or at start-up" | |
403 " otherwise concurrent mutator activity may make heap " | |
404 " unparsable again"); | |
1166 | 405 const bool use_tlab = UseTLAB; |
406 const bool deferred = _defer_initial_card_mark; | |
407 // The main thread starts allocating via a TLAB even before it | |
408 // has added itself to the threads list at vm boot-up. | |
409 assert(!use_tlab || Threads::first() != NULL, | |
410 "Attempt to fill tlabs before main thread has been added" | |
411 " to threads list is doomed to failure!"); | |
412 for (JavaThread *thread = Threads::first(); thread; thread = thread->next()) { | |
413 if (use_tlab) thread->tlab().make_parsable(retire_tlabs); | |
414 #ifdef COMPILER2 | |
415 // The deferred store barriers must all have been flushed to the | |
416 // card-table (or other remembered set structure) before GC starts | |
417 // processing the card-table (or other remembered set). | |
418 if (deferred) flush_deferred_store_barrier(thread); | |
419 #else | |
420 assert(!deferred, "Should be false"); | |
421 assert(thread->deferred_card_mark().is_empty(), "Should be empty"); | |
422 #endif | |
0 | 423 } |
424 } | |
425 | |
426 void CollectedHeap::accumulate_statistics_all_tlabs() { | |
427 if (UseTLAB) { | |
428 assert(SafepointSynchronize::is_at_safepoint() || | |
429 !is_init_completed(), | |
430 "should only accumulate statistics on tlabs at safepoint"); | |
431 | |
432 ThreadLocalAllocBuffer::accumulate_statistics_before_gc(); | |
433 } | |
434 } | |
435 | |
436 void CollectedHeap::resize_all_tlabs() { | |
437 if (UseTLAB) { | |
438 assert(SafepointSynchronize::is_at_safepoint() || | |
439 !is_init_completed(), | |
440 "should only resize tlabs at safepoint"); | |
441 | |
442 ThreadLocalAllocBuffer::resize_all_tlabs(); | |
443 } | |
444 } | |
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445 |
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446 void CollectedHeap::pre_full_gc_dump() { |
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447 if (HeapDumpBeforeFullGC) { |
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448 TraceTime tt("Heap Dump (before full gc): ", PrintGCDetails, false, gclog_or_tty); |
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449 // We are doing a "major" collection and a heap dump before |
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450 // major collection has been requested. |
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451 HeapDumper::dump_heap(); |
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452 } |
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453 if (PrintClassHistogramBeforeFullGC) { |
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454 TraceTime tt("Class Histogram (before full gc): ", PrintGCDetails, true, gclog_or_tty); |
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455 VM_GC_HeapInspection inspector(gclog_or_tty, false /* ! full gc */, false /* ! prologue */); |
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456 inspector.doit(); |
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457 } |
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458 } |
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459 |
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460 void CollectedHeap::post_full_gc_dump() { |
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461 if (HeapDumpAfterFullGC) { |
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462 TraceTime tt("Heap Dump (after full gc): ", PrintGCDetails, false, gclog_or_tty); |
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463 HeapDumper::dump_heap(); |
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464 } |
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465 if (PrintClassHistogramAfterFullGC) { |
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466 TraceTime tt("Class Histogram (after full gc): ", PrintGCDetails, true, gclog_or_tty); |
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467 VM_GC_HeapInspection inspector(gclog_or_tty, false /* ! full gc */, false /* ! prologue */); |
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468 inspector.doit(); |
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469 } |
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470 } |
4009 | 471 |
472 oop CollectedHeap::Class_obj_allocate(KlassHandle klass, int size, KlassHandle real_klass, TRAPS) { | |
473 debug_only(check_for_valid_allocation_state()); | |
474 assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); | |
475 assert(size >= 0, "int won't convert to size_t"); | |
476 HeapWord* obj; | |
477 if (JavaObjectsInPerm) { | |
478 obj = common_permanent_mem_allocate_init(size, CHECK_NULL); | |
479 } else { | |
480 assert(ScavengeRootsInCode > 0, "must be"); | |
481 obj = common_mem_allocate_init(size, CHECK_NULL); | |
482 } | |
483 post_allocation_setup_common(klass, obj, size); | |
484 assert(Universe::is_bootstrapping() || | |
485 !((oop)obj)->blueprint()->oop_is_array(), "must not be an array"); | |
486 NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size)); | |
487 oop mirror = (oop)obj; | |
488 | |
489 java_lang_Class::set_oop_size(mirror, size); | |
490 | |
491 // Setup indirections | |
492 if (!real_klass.is_null()) { | |
493 java_lang_Class::set_klass(mirror, real_klass()); | |
494 real_klass->set_java_mirror(mirror); | |
495 } | |
496 | |
497 instanceMirrorKlass* mk = instanceMirrorKlass::cast(mirror->klass()); | |
498 assert(size == mk->instance_size(real_klass), "should have been set"); | |
499 | |
500 // notify jvmti and dtrace | |
501 post_allocation_notify(klass, (oop)obj); | |
502 | |
503 return mirror; | |
504 } | |
4708 | 505 |
506 /////////////// Unit tests /////////////// | |
507 | |
508 #ifndef PRODUCT | |
509 void CollectedHeap::test_is_in() { | |
510 CollectedHeap* heap = Universe::heap(); | |
511 | |
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512 uintptr_t epsilon = (uintptr_t) MinObjAlignment; |
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513 uintptr_t heap_start = (uintptr_t) heap->_reserved.start(); |
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514 uintptr_t heap_end = (uintptr_t) heap->_reserved.end(); |
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515 |
4708 | 516 // Test that NULL is not in the heap. |
517 assert(!heap->is_in(NULL), "NULL is unexpectedly in the heap"); | |
518 | |
519 // Test that a pointer to before the heap start is reported as outside the heap. | |
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520 assert(heap_start >= ((uintptr_t)NULL + epsilon), "sanity"); |
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521 void* before_heap = (void*)(heap_start - epsilon); |
4708 | 522 assert(!heap->is_in(before_heap), |
523 err_msg("before_heap: " PTR_FORMAT " is unexpectedly in the heap", before_heap)); | |
524 | |
525 // Test that a pointer to after the heap end is reported as outside the heap. | |
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526 assert(heap_end <= ((uintptr_t)-1 - epsilon), "sanity"); |
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527 void* after_heap = (void*)(heap_end + epsilon); |
4708 | 528 assert(!heap->is_in(after_heap), |
529 err_msg("after_heap: " PTR_FORMAT " is unexpectedly in the heap", after_heap)); | |
530 } | |
531 #endif |