24 
  25 #include "precompiled.hpp"
  26 #include "classfile/javaClasses.hpp"
  27 #include "classfile/stringTable.hpp"
  28 #include "classfile/symbolTable.hpp"
  29 #include "classfile/systemDictionary.hpp"
  30 #include "classfile/vmSymbols.hpp"
  31 #include "code/codeCache.hpp"
  32 #include "code/icBuffer.hpp"
  33 #include "gc/serial/genMarkSweep.hpp"
  34 #include "gc/shared/collectedHeap.inline.hpp"
  35 #include "gc/shared/gcHeapSummary.hpp"
  36 #include "gc/shared/gcTimer.hpp"
  37 #include "gc/shared/gcTrace.hpp"
  38 #include "gc/shared/gcTraceTime.inline.hpp"
  39 #include "gc/shared/genCollectedHeap.hpp"
  40 #include "gc/shared/generation.hpp"
  41 #include "gc/shared/genOopClosures.inline.hpp"
  42 #include "gc/shared/modRefBarrierSet.hpp"
  43 #include "gc/shared/referencePolicy.hpp"

  44 #include "gc/shared/space.hpp"
  45 #include "gc/shared/strongRootsScope.hpp"
  46 #include "gc/shared/weakProcessor.hpp"
  47 #include "oops/instanceRefKlass.hpp"
  48 #include "oops/oop.inline.hpp"
  49 #include "prims/jvmtiExport.hpp"
  50 #include "runtime/handles.inline.hpp"
  51 #include "runtime/synchronizer.hpp"
  52 #include "runtime/thread.inline.hpp"
  53 #include "runtime/vmThread.hpp"
  54 #include "utilities/copy.hpp"
  55 #include "utilities/events.hpp"
  56 #include "utilities/stack.inline.hpp"
  57 
  58 void GenMarkSweep::invoke_at_safepoint(ReferenceProcessor* rp, bool clear_all_softrefs) {
  59   assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint");
  60 
  61   GenCollectedHeap* gch = GenCollectedHeap::heap();
  62 #ifdef ASSERT
  63   if (gch->collector_policy()->should_clear_all_soft_refs()) {
  64     assert(clear_all_softrefs, "Policy should have been checked earlier");
  65   }
  66 #endif
  67 
  68   // hook up weak ref data so it can be used during Mark-Sweep
  69   assert(ref_processor() == NULL, "no stomping");
  70   assert(rp != NULL, "should be non-NULL");
  71   set_ref_processor(rp);
  72   rp->setup_policy(clear_all_softrefs);
  73 
  74   gch->trace_heap_before_gc(_gc_tracer);
  75 
  76   // When collecting the permanent generation Method*s may be moving,
  77   // so we either have to flush all bcp data or convert it into bci.
  78   CodeCache::gc_prologue();
  79 
  80   // Increment the invocation count
  81   _total_invocations++;
  82 
  83   // Capture used regions for each generation that will be

  24 
  25 #include "precompiled.hpp"
  26 #include "classfile/javaClasses.hpp"
  27 #include "classfile/stringTable.hpp"
  28 #include "classfile/symbolTable.hpp"
  29 #include "classfile/systemDictionary.hpp"
  30 #include "classfile/vmSymbols.hpp"
  31 #include "code/codeCache.hpp"
  32 #include "code/icBuffer.hpp"
  33 #include "gc/serial/genMarkSweep.hpp"
  34 #include "gc/shared/collectedHeap.inline.hpp"
  35 #include "gc/shared/gcHeapSummary.hpp"
  36 #include "gc/shared/gcTimer.hpp"
  37 #include "gc/shared/gcTrace.hpp"
  38 #include "gc/shared/gcTraceTime.inline.hpp"
  39 #include "gc/shared/genCollectedHeap.hpp"
  40 #include "gc/shared/generation.hpp"
  41 #include "gc/shared/genOopClosures.inline.hpp"
  42 #include "gc/shared/modRefBarrierSet.hpp"
  43 #include "gc/shared/referencePolicy.hpp"
  44 #include "gc/shared/softRefPolicy.hpp"
  45 #include "gc/shared/space.hpp"
  46 #include "gc/shared/strongRootsScope.hpp"
  47 #include "gc/shared/weakProcessor.hpp"
  48 #include "oops/instanceRefKlass.hpp"
  49 #include "oops/oop.inline.hpp"
  50 #include "prims/jvmtiExport.hpp"
  51 #include "runtime/handles.inline.hpp"
  52 #include "runtime/synchronizer.hpp"
  53 #include "runtime/thread.inline.hpp"
  54 #include "runtime/vmThread.hpp"
  55 #include "utilities/copy.hpp"
  56 #include "utilities/events.hpp"
  57 #include "utilities/stack.inline.hpp"
  58 
  59 void GenMarkSweep::invoke_at_safepoint(ReferenceProcessor* rp, bool clear_all_softrefs) {
  60   assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint");
  61 
  62   GenCollectedHeap* gch = GenCollectedHeap::heap();
  63 #ifdef ASSERT
  64   if (gch->soft_ref_policy()->should_clear_all_soft_refs()) {
  65     assert(clear_all_softrefs, "Policy should have been checked earlier");
  66   }
  67 #endif
  68 
  69   // hook up weak ref data so it can be used during Mark-Sweep
  70   assert(ref_processor() == NULL, "no stomping");
  71   assert(rp != NULL, "should be non-NULL");
  72   set_ref_processor(rp);
  73   rp->setup_policy(clear_all_softrefs);
  74 
  75   gch->trace_heap_before_gc(_gc_tracer);
  76 
  77   // When collecting the permanent generation Method*s may be moving,
  78   // so we either have to flush all bcp data or convert it into bci.
  79   CodeCache::gc_prologue();
  80 
  81   // Increment the invocation count
  82   _total_invocations++;
  83 
  84   // Capture used regions for each generation that will be