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8065579: WB method to start G1 concurrent mark cycle should be introduced

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Add a WhiteBox callback to the VM to start a concurrent mark cycle in G1.

Reviewed-by: tschatzl, sjohanss
This commit is contained in:
Leonid Mesnik 2014-11-28 09:33:48 +01:00 • committed by Thomas Schatzl
parent 0ecc753586
commit c8a147b8c7
7 changed files with 82 additions and 10 deletions
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14
hotspot/src/share/vm/prims/whitebox.cpp
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@ -49,6 +49,7 @@
#if INCLUDE_ALL_GCS
#include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp"
#include "gc_implementation/g1/concurrentMark.hpp"
#include "gc_implementation/g1/concurrentMarkThread.hpp"
#include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
#include "gc_implementation/g1/heapRegionRemSet.hpp"
#endif // INCLUDE_ALL_GCS
@ -266,8 +267,16 @@ WB_END
WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
G1CollectedHeap* g1 = G1CollectedHeap::heap();
ConcurrentMark* cm = g1->concurrent_mark();
return cm->concurrent_marking_in_progress();
return g1->concurrent_mark()->cmThread()->during_cycle();
WB_END
WB_ENTRY(jboolean, WB_G1StartMarkCycle(JNIEnv* env, jobject o))
G1CollectedHeap* g1h = G1CollectedHeap::heap();
if (!g1h->concurrent_mark()->cmThread()->during_cycle()) {
g1h->collect(GCCause::_wb_conc_mark);
return true;
}
return false;
WB_END
WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
@ -1106,6 +1115,7 @@ static JNINativeMethod methods[] = {
{CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
{CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
{CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
{CC"g1StartConcMarkCycle", CC"()Z", (void*)&WB_G1StartMarkCycle },
#endif // INCLUDE_ALL_GCS
#if INCLUDE_NMT
{CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },