30 #include "jfr/leakprofiler/sampling/objectSampler.hpp" 31 #include "jfr/recorder/service/jfrOptionSet.hpp" 32 #include "memory/iterator.hpp" 33 #include "oops/oop.hpp" 34 #include "runtime/atomic.hpp" 35 #include "runtime/orderAccess.hpp" 36 #include "runtime/thread.inline.hpp" 37 #include "runtime/vmThread.hpp" 38 #include "utilities/ostream.hpp" 39 40 // Only to be updated during safepoint 41 ObjectSampler* LeakProfiler::_object_sampler = NULL; 42 43 static volatile jbyte suspended = 0; 44 bool LeakProfiler::start(jint sample_count) { 45 if (UseZGC) { 46 log_warning(jfr)("LeakProfiler is currently not supported in combination with ZGC"); 47 return false; 48 } 49 50 if (_object_sampler != NULL) { 51 // already started 52 return true; 53 } 54 // Allows user to disable leak profiler on command line by setting queue size to zero. 55 if (sample_count > 0) { 56 StartOperation op(sample_count); 57 VMThread::execute(&op); 58 return _object_sampler != NULL; 59 } 60 return false; 61 } 62 63 bool LeakProfiler::stop() { 64 if (_object_sampler == NULL) { 65 // already stopped/not started 66 return true; 67 } 68 StopOperation op; 69 VMThread::execute(&op); | 30 #include "jfr/leakprofiler/sampling/objectSampler.hpp" 31 #include "jfr/recorder/service/jfrOptionSet.hpp" 32 #include "memory/iterator.hpp" 33 #include "oops/oop.hpp" 34 #include "runtime/atomic.hpp" 35 #include "runtime/orderAccess.hpp" 36 #include "runtime/thread.inline.hpp" 37 #include "runtime/vmThread.hpp" 38 #include "utilities/ostream.hpp" 39 40 // Only to be updated during safepoint 41 ObjectSampler* LeakProfiler::_object_sampler = NULL; 42 43 static volatile jbyte suspended = 0; 44 bool LeakProfiler::start(jint sample_count) { 45 if (UseZGC) { 46 log_warning(jfr)("LeakProfiler is currently not supported in combination with ZGC"); 47 return false; 48 } 49 50 if (UseShenandoahGC) { 51 log_warning(jfr)("LeakProfiler is currently not supported in combination with Shenandoah GC"); 52 return false; 53 } 54 55 if (_object_sampler != NULL) { 56 // already started 57 return true; 58 } 59 // Allows user to disable leak profiler on command line by setting queue size to zero. 60 if (sample_count > 0) { 61 StartOperation op(sample_count); 62 VMThread::execute(&op); 63 return _object_sampler != NULL; 64 } 65 return false; 66 } 67 68 bool LeakProfiler::stop() { 69 if (_object_sampler == NULL) { 70 // already stopped/not started 71 return true; 72 } 73 StopOperation op; 74 VMThread::execute(&op); |