17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "jfr/leakprofiler/leakProfiler.hpp"
26 #include "jfr/leakprofiler/startOperation.hpp"
27 #include "jfr/leakprofiler/stopOperation.hpp"
28 #include "jfr/leakprofiler/checkpoint/eventEmitter.hpp"
29 #include "jfr/leakprofiler/sampling/objectSampler.hpp"
30 #include "jfr/recorder/service/jfrOptionSet.hpp"
31 #include "logging/log.hpp"
32 #include "memory/iterator.hpp"
33 #include "runtime/javaThread.inline.hpp"
34 #include "runtime/vmThread.hpp"
35
36 bool LeakProfiler::is_supported() {
37 if (UseShenandoahGC) {
38 // Leak Profiler uses mark words in the ways that might interfere
39 // with concurrent GC uses of them. This affects Shenandoah.
40 return false;
41 }
42 return true;
43 }
44
45 bool LeakProfiler::is_running() {
46 return ObjectSampler::is_created();
47 }
48
49 bool LeakProfiler::start(int sample_count) {
50 if (is_running()) {
51 return true;
52 }
53
54 // Allows user to disable leak profiler on command line by setting queue size to zero.
55 if (sample_count == 0) {
56 return false;
57 }
58
59 // Exit cleanly if not supported
|
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "jfr/leakprofiler/leakProfiler.hpp"
26 #include "jfr/leakprofiler/startOperation.hpp"
27 #include "jfr/leakprofiler/stopOperation.hpp"
28 #include "jfr/leakprofiler/checkpoint/eventEmitter.hpp"
29 #include "jfr/leakprofiler/sampling/objectSampler.hpp"
30 #include "jfr/recorder/service/jfrOptionSet.hpp"
31 #include "logging/log.hpp"
32 #include "memory/iterator.hpp"
33 #include "runtime/javaThread.inline.hpp"
34 #include "runtime/vmThread.hpp"
35
36 bool LeakProfiler::is_supported() {
37 if (UseCompactObjectHeaders || UseShenandoahGC) {
38 // 1. With a 32-bit mark word in Lilliput2, we don't have enough unused
39 // bits to store edge index information in the mark word
40 // 2. Even without compressed object headers, with Shenandoah, we don't
41 // have enough free bits in the mark word because of needing that
42 // space for forwarding pointers in the evacuation & update refs phase.
43 return false;
44 }
45 return true;
46 }
47
48 bool LeakProfiler::is_running() {
49 return ObjectSampler::is_created();
50 }
51
52 bool LeakProfiler::start(int sample_count) {
53 if (is_running()) {
54 return true;
55 }
56
57 // Allows user to disable leak profiler on command line by setting queue size to zero.
58 if (sample_count == 0) {
59 return false;
60 }
61
62 // Exit cleanly if not supported
|