29 #include "classfile/symbolTable.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "code/codeCache.hpp"
33 #include "code/icBuffer.hpp"
34 #include "compiler/oopMap.hpp"
35 #include "gc/serial/cardTableRS.hpp"
36 #include "gc/serial/genMarkSweep.hpp"
37 #include "gc/serial/serialGcRefProcProxyTask.hpp"
38 #include "gc/shared/classUnloadingContext.hpp"
39 #include "gc/shared/collectedHeap.inline.hpp"
40 #include "gc/shared/gcHeapSummary.hpp"
41 #include "gc/shared/gcTimer.hpp"
42 #include "gc/shared/gcTrace.hpp"
43 #include "gc/shared/gcTraceTime.inline.hpp"
44 #include "gc/shared/genCollectedHeap.hpp"
45 #include "gc/shared/generation.hpp"
46 #include "gc/shared/modRefBarrierSet.hpp"
47 #include "gc/shared/referencePolicy.hpp"
48 #include "gc/shared/referenceProcessorPhaseTimes.hpp"
49 #include "gc/shared/space.hpp"
50 #include "gc/shared/strongRootsScope.hpp"
51 #include "gc/shared/weakProcessor.hpp"
52 #include "memory/universe.hpp"
53 #include "oops/instanceRefKlass.hpp"
54 #include "oops/oop.inline.hpp"
55 #include "prims/jvmtiExport.hpp"
56 #include "runtime/handles.inline.hpp"
57 #include "runtime/javaThread.hpp"
58 #include "runtime/synchronizer.hpp"
59 #include "runtime/vmThread.hpp"
60 #include "utilities/copy.hpp"
61 #include "utilities/events.hpp"
62 #include "utilities/stack.inline.hpp"
63 #if INCLUDE_JVMCI
64 #include "jvmci/jvmci.hpp"
65 #endif
66
67 void GenMarkSweep::invoke_at_safepoint(bool clear_all_softrefs) {
68 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint");
71 #ifdef ASSERT
72 if (gch->soft_ref_policy()->should_clear_all_soft_refs()) {
73 assert(clear_all_softrefs, "Policy should have been checked earlier");
74 }
75 #endif
76
77 gch->trace_heap_before_gc(_gc_tracer);
78
79 // Increment the invocation count
80 _total_invocations++;
81
82 // Capture used regions for each generation that will be
83 // subject to collection, so that card table adjustments can
84 // be made intelligently (see clear / invalidate further below).
85 gch->save_used_regions();
86
87 allocate_stacks();
88
89 mark_sweep_phase1(clear_all_softrefs);
90
91 mark_sweep_phase2();
92
93 // Don't add any more derived pointers during phase3
94 #if COMPILER2_OR_JVMCI
95 assert(DerivedPointerTable::is_active(), "Sanity");
96 DerivedPointerTable::set_active(false);
97 #endif
98
99 mark_sweep_phase3();
100
101 mark_sweep_phase4();
102
103 restore_marks();
104
105 // Set saved marks for allocation profiler (and other things? -- dld)
106 // (Should this be in general part?)
107 gch->save_marks();
108
109 deallocate_stacks();
110
111 MarkSweep::_string_dedup_requests->flush();
112
113 bool is_young_gen_empty = (gch->young_gen()->used() == 0);
114 gch->rem_set()->maintain_old_to_young_invariant(gch->old_gen(), is_young_gen_empty);
115
116 gch->prune_scavengable_nmethods();
117
118 // Update heap occupancy information which is used as
119 // input to soft ref clearing policy at the next gc.
120 Universe::heap()->update_capacity_and_used_at_gc();
121
122 // Signal that we have completed a visit to all live objects.
123 Universe::heap()->record_whole_heap_examined_timestamp();
124
125 gch->trace_heap_after_gc(_gc_tracer);
126 }
127
128 void GenMarkSweep::allocate_stacks() {
243 GCTraceTime(Info, gc, phases) tm("Phase 2: Compute new object addresses", _gc_timer);
244
245 GenCollectedHeap::heap()->prepare_for_compaction();
246 }
247
248 class GenAdjustPointersClosure: public GenCollectedHeap::GenClosure {
249 public:
250 void do_generation(Generation* gen) {
251 gen->adjust_pointers();
252 }
253 };
254
255 void GenMarkSweep::mark_sweep_phase3() {
256 GenCollectedHeap* gch = GenCollectedHeap::heap();
257
258 // Adjust the pointers to reflect the new locations
259 GCTraceTime(Info, gc, phases) tm("Phase 3: Adjust pointers", gc_timer());
260
261 ClassLoaderDataGraph::verify_claimed_marks_cleared(ClassLoaderData::_claim_stw_fullgc_adjust);
262
263 CodeBlobToOopClosure code_closure(&adjust_pointer_closure, CodeBlobToOopClosure::FixRelocations);
264 gch->process_roots(GenCollectedHeap::SO_AllCodeCache,
265 &adjust_pointer_closure,
266 &adjust_cld_closure,
267 &adjust_cld_closure,
268 &code_closure);
269
270 gch->gen_process_weak_roots(&adjust_pointer_closure);
271
272 adjust_marks();
273 GenAdjustPointersClosure blk;
274 gch->generation_iterate(&blk, true);
275 }
276
277 class GenCompactClosure: public GenCollectedHeap::GenClosure {
278 public:
279 void do_generation(Generation* gen) {
280 gen->compact();
281 }
282 };
283
284 void GenMarkSweep::mark_sweep_phase4() {
285 // All pointers are now adjusted, move objects accordingly
286 GCTraceTime(Info, gc, phases) tm("Phase 4: Move objects", _gc_timer);
287
288 GenCompactClosure blk;
289 GenCollectedHeap::heap()->generation_iterate(&blk, true);
290 }
|
29 #include "classfile/symbolTable.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "code/codeCache.hpp"
33 #include "code/icBuffer.hpp"
34 #include "compiler/oopMap.hpp"
35 #include "gc/serial/cardTableRS.hpp"
36 #include "gc/serial/genMarkSweep.hpp"
37 #include "gc/serial/serialGcRefProcProxyTask.hpp"
38 #include "gc/shared/classUnloadingContext.hpp"
39 #include "gc/shared/collectedHeap.inline.hpp"
40 #include "gc/shared/gcHeapSummary.hpp"
41 #include "gc/shared/gcTimer.hpp"
42 #include "gc/shared/gcTrace.hpp"
43 #include "gc/shared/gcTraceTime.inline.hpp"
44 #include "gc/shared/genCollectedHeap.hpp"
45 #include "gc/shared/generation.hpp"
46 #include "gc/shared/modRefBarrierSet.hpp"
47 #include "gc/shared/referencePolicy.hpp"
48 #include "gc/shared/referenceProcessorPhaseTimes.hpp"
49 #include "gc/shared/slidingForwarding.hpp"
50 #include "gc/shared/space.hpp"
51 #include "gc/shared/strongRootsScope.hpp"
52 #include "gc/shared/weakProcessor.hpp"
53 #include "memory/universe.hpp"
54 #include "oops/instanceRefKlass.hpp"
55 #include "oops/oop.inline.hpp"
56 #include "prims/jvmtiExport.hpp"
57 #include "runtime/handles.inline.hpp"
58 #include "runtime/javaThread.hpp"
59 #include "runtime/synchronizer.hpp"
60 #include "runtime/vmThread.hpp"
61 #include "utilities/copy.hpp"
62 #include "utilities/events.hpp"
63 #include "utilities/stack.inline.hpp"
64 #if INCLUDE_JVMCI
65 #include "jvmci/jvmci.hpp"
66 #endif
67
68 void GenMarkSweep::invoke_at_safepoint(bool clear_all_softrefs) {
69 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint");
72 #ifdef ASSERT
73 if (gch->soft_ref_policy()->should_clear_all_soft_refs()) {
74 assert(clear_all_softrefs, "Policy should have been checked earlier");
75 }
76 #endif
77
78 gch->trace_heap_before_gc(_gc_tracer);
79
80 // Increment the invocation count
81 _total_invocations++;
82
83 // Capture used regions for each generation that will be
84 // subject to collection, so that card table adjustments can
85 // be made intelligently (see clear / invalidate further below).
86 gch->save_used_regions();
87
88 allocate_stacks();
89
90 mark_sweep_phase1(clear_all_softrefs);
91
92 SlidingForwarding::begin();
93
94 mark_sweep_phase2();
95
96 // Don't add any more derived pointers during phase3
97 #if COMPILER2_OR_JVMCI
98 assert(DerivedPointerTable::is_active(), "Sanity");
99 DerivedPointerTable::set_active(false);
100 #endif
101
102 mark_sweep_phase3();
103
104 mark_sweep_phase4();
105
106 restore_marks();
107
108 // Set saved marks for allocation profiler (and other things? -- dld)
109 // (Should this be in general part?)
110 gch->save_marks();
111
112 SlidingForwarding::end();
113
114 deallocate_stacks();
115
116 MarkSweep::_string_dedup_requests->flush();
117
118 bool is_young_gen_empty = (gch->young_gen()->used() == 0);
119 gch->rem_set()->maintain_old_to_young_invariant(gch->old_gen(), is_young_gen_empty);
120
121 gch->prune_scavengable_nmethods();
122
123 // Update heap occupancy information which is used as
124 // input to soft ref clearing policy at the next gc.
125 Universe::heap()->update_capacity_and_used_at_gc();
126
127 // Signal that we have completed a visit to all live objects.
128 Universe::heap()->record_whole_heap_examined_timestamp();
129
130 gch->trace_heap_after_gc(_gc_tracer);
131 }
132
133 void GenMarkSweep::allocate_stacks() {
248 GCTraceTime(Info, gc, phases) tm("Phase 2: Compute new object addresses", _gc_timer);
249
250 GenCollectedHeap::heap()->prepare_for_compaction();
251 }
252
253 class GenAdjustPointersClosure: public GenCollectedHeap::GenClosure {
254 public:
255 void do_generation(Generation* gen) {
256 gen->adjust_pointers();
257 }
258 };
259
260 void GenMarkSweep::mark_sweep_phase3() {
261 GenCollectedHeap* gch = GenCollectedHeap::heap();
262
263 // Adjust the pointers to reflect the new locations
264 GCTraceTime(Info, gc, phases) tm("Phase 3: Adjust pointers", gc_timer());
265
266 ClassLoaderDataGraph::verify_claimed_marks_cleared(ClassLoaderData::_claim_stw_fullgc_adjust);
267
268 if (UseAltGCForwarding) {
269 AdjustPointerClosure<true> adjust_pointer_closure;
270 CLDToOopClosure adjust_cld_closure(&adjust_pointer_closure, ClassLoaderData::_claim_stw_fullgc_adjust);
271 CodeBlobToOopClosure code_closure(&adjust_pointer_closure, CodeBlobToOopClosure::FixRelocations);
272 gch->process_roots(GenCollectedHeap::SO_AllCodeCache,
273 &adjust_pointer_closure,
274 &adjust_cld_closure,
275 &adjust_cld_closure,
276 &code_closure);
277 gch->gen_process_weak_roots(&adjust_pointer_closure);
278 } else {
279 AdjustPointerClosure<false> adjust_pointer_closure;
280 CLDToOopClosure adjust_cld_closure(&adjust_pointer_closure, ClassLoaderData::_claim_stw_fullgc_adjust);
281 CodeBlobToOopClosure code_closure(&adjust_pointer_closure, CodeBlobToOopClosure::FixRelocations);
282 gch->process_roots(GenCollectedHeap::SO_AllCodeCache,
283 &adjust_pointer_closure,
284 &adjust_cld_closure,
285 &adjust_cld_closure,
286 &code_closure);
287 gch->gen_process_weak_roots(&adjust_pointer_closure);
288 }
289 adjust_marks();
290 GenAdjustPointersClosure blk;
291 gch->generation_iterate(&blk, true);
292 }
293
294 class GenCompactClosure: public GenCollectedHeap::GenClosure {
295 public:
296 void do_generation(Generation* gen) {
297 gen->compact();
298 }
299 };
300
301 void GenMarkSweep::mark_sweep_phase4() {
302 // All pointers are now adjusted, move objects accordingly
303 GCTraceTime(Info, gc, phases) tm("Phase 4: Move objects", _gc_timer);
304
305 GenCompactClosure blk;
306 GenCollectedHeap::heap()->generation_iterate(&blk, true);
307 }
|