1 /*
2 * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
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 "precompiled.hpp"
26 #include "jni.h"
27 #include "jvm.h"
28 #include "jfr/jfr.hpp"
29 #include "jfr/jfrEvents.hpp"
30 #include "jfr/periodic/sampling/jfrThreadSampler.hpp"
31 #include "jfr/recorder/jfrEventSetting.hpp"
32 #include "jfr/recorder/jfrRecorder.hpp"
33 #include "jfr/recorder/checkpoint/jfrMetadataEvent.hpp"
34 #include "jfr/recorder/checkpoint/types/traceid/jfrTraceId.inline.hpp"
35 #include "jfr/recorder/repository/jfrRepository.hpp"
36 #include "jfr/recorder/repository/jfrChunkSizeNotifier.hpp"
37 #include "jfr/recorder/repository/jfrChunkWriter.hpp"
38 #include "jfr/recorder/service/jfrOptionSet.hpp"
39 #include "jfr/recorder/stacktrace/jfrStackTraceRepository.hpp"
40 #include "jfr/recorder/stringpool/jfrStringPool.hpp"
41 #include "jfr/jni/jfrGetAllEventClasses.hpp"
42 #include "jfr/jni/jfrJavaSupport.hpp"
43 #include "jfr/jni/jfrJniMethodRegistration.hpp"
44 #include "jfr/instrumentation/jfrEventClassTransformer.hpp"
45 #include "jfr/instrumentation/jfrJvmtiAgent.hpp"
46 #include "jfr/leakprofiler/leakProfiler.hpp"
47 #include "jfr/utilities/jfrJavaLog.hpp"
48 #include "jfr/utilities/jfrTimeConverter.hpp"
49 #include "jfr/utilities/jfrTime.hpp"
50 #include "jfr/writers/jfrJavaEventWriter.hpp"
51 #include "jfrfiles/jfrPeriodic.hpp"
52 #include "memory/resourceArea.hpp"
53 #include "runtime/interfaceSupport.hpp"
54 #include "runtime/mutexLocker.hpp"
55 #include "runtime/os.hpp"
56 #include "runtime/thread.hpp"
57 #include "utilities/debug.hpp"
58
59 #define NO_TRANSITION(result_type, header) extern "C" { result_type JNICALL header {
60 #define NO_TRANSITION_END } }
61
62 /*
63 * NO_TRANSITION entries
64 *
65 * Thread remains _thread_in_native
66 */
67
68 NO_TRANSITION(void, jfr_register_natives(JNIEnv* env, jclass jvmclass))
69 JfrJniMethodRegistration register_native_methods(env);
70 NO_TRANSITION_END
71
72 NO_TRANSITION(jboolean, jfr_is_enabled())
73 return Jfr::is_enabled() ? JNI_TRUE : JNI_FALSE;
74 NO_TRANSITION_END
75
76 NO_TRANSITION(jboolean, jfr_is_disabled())
77 return Jfr::is_disabled() ? JNI_TRUE : JNI_FALSE;
78 NO_TRANSITION_END
79
80 NO_TRANSITION(jboolean, jfr_is_started())
81 return JfrRecorder::is_created() ? JNI_TRUE : JNI_FALSE;
82 NO_TRANSITION_END
83
84 NO_TRANSITION(jstring, jfr_get_pid(JNIEnv* env, jobject jvm))
85 char pid_buf[32] = { 0 };
86 jio_snprintf(pid_buf, sizeof(pid_buf), "%d", os::current_process_id());
87 jstring pid_string = env->NewStringUTF(pid_buf);
88 return pid_string; // exception pending if NULL
89 NO_TRANSITION_END
90
91 NO_TRANSITION(jlong, jfr_elapsed_frequency(JNIEnv* env, jobject jvm))
92 return JfrTime::frequency();
93 NO_TRANSITION_END
94
95 NO_TRANSITION(jlong, jfr_elapsed_counter(JNIEnv* env, jobject jvm))
96 return JfrTicks::now();
97 NO_TRANSITION_END
98
99 NO_TRANSITION(void, jfr_retransform_classes(JNIEnv* env, jobject jvm, jobjectArray classes))
100 JfrJvmtiAgent::retransform_classes(env, classes, JavaThread::thread_from_jni_environment(env));
101 NO_TRANSITION_END
102
103 NO_TRANSITION(void, jfr_set_enabled(JNIEnv* env, jobject jvm, jlong event_type_id, jboolean enabled))
104 JfrEventSetting::set_enabled(event_type_id, JNI_TRUE == enabled);
105 if (EventOldObjectSample::eventId == event_type_id) {
106 ThreadInVMfromNative transition(JavaThread::thread_from_jni_environment(env));
107 if (JNI_TRUE == enabled) {
108 LeakProfiler::start(JfrOptionSet::old_object_queue_size());
109 } else {
110 LeakProfiler::stop();
111 }
112 }
113 NO_TRANSITION_END
114
115 NO_TRANSITION(void, jfr_set_file_notification(JNIEnv* env, jobject jvm, jlong threshold))
116 JfrChunkSizeNotifier::set_chunk_size_threshold((size_t)threshold);
117 NO_TRANSITION_END
118
119 NO_TRANSITION(void, jfr_set_sample_threads(JNIEnv* env, jobject jvm, jboolean sampleThreads))
120 JfrOptionSet::set_sample_threads(sampleThreads);
121 NO_TRANSITION_END
122
123 NO_TRANSITION(void, jfr_set_stack_depth(JNIEnv* env, jobject jvm, jint depth))
124 JfrOptionSet::set_stackdepth((jlong)depth);
125 NO_TRANSITION_END
126
127 NO_TRANSITION(void, jfr_set_stacktrace_enabled(JNIEnv* env, jobject jvm, jlong event_type_id, jboolean enabled))
128 JfrEventSetting::set_stacktrace(event_type_id, JNI_TRUE == enabled);
129 NO_TRANSITION_END
130
131 NO_TRANSITION(void, jfr_set_global_buffer_count(JNIEnv* env, jobject jvm, jlong count))
132 JfrOptionSet::set_num_global_buffers(count);
133 NO_TRANSITION_END
134
135 NO_TRANSITION(void, jfr_set_global_buffer_size(JNIEnv* env, jobject jvm, jlong size))
136 JfrOptionSet::set_global_buffer_size(size);
137 NO_TRANSITION_END
138
139 NO_TRANSITION(void, jfr_set_thread_buffer_size(JNIEnv* env, jobject jvm, jlong size))
140 JfrOptionSet::set_thread_buffer_size(size);
141 NO_TRANSITION_END
142
143 NO_TRANSITION(void, jfr_set_memory_size(JNIEnv* env, jobject jvm, jlong size))
144 JfrOptionSet::set_memory_size(size);
145 NO_TRANSITION_END
146
147 NO_TRANSITION(jboolean, jfr_set_threshold(JNIEnv* env, jobject jvm, jlong event_type_id, jlong thresholdTicks))
148 return JfrEventSetting::set_threshold(event_type_id, thresholdTicks) ? JNI_TRUE : JNI_FALSE;
149 NO_TRANSITION_END
150
151 NO_TRANSITION(jboolean, jfr_allow_event_retransforms(JNIEnv* env, jobject jvm))
152 return JfrOptionSet::allow_event_retransforms() ? JNI_TRUE : JNI_FALSE;
153 NO_TRANSITION_END
154
155 NO_TRANSITION(jboolean, jfr_is_available(JNIEnv* env, jclass jvm))
156 return !Jfr::is_disabled() ? JNI_TRUE : JNI_FALSE;
157 NO_TRANSITION_END
158
159 NO_TRANSITION(jlong, jfr_get_epoch_address(JNIEnv* env, jobject jvm))
160 return JfrTraceIdEpoch::epoch_address();
161 NO_TRANSITION_END
162
163 NO_TRANSITION(jlong, jfr_get_unloaded_event_classes_count(JNIEnv* env, jobject jvm))
164 return JfrEventClasses::unloaded_event_classes_count();
165 NO_TRANSITION_END
166
167 NO_TRANSITION(jdouble, jfr_time_conv_factor(JNIEnv* env, jobject jvm))
168 return (jdouble)JfrTimeConverter::nano_to_counter_multiplier();
169 NO_TRANSITION_END
170
171 NO_TRANSITION(jboolean, jfr_set_cutoff(JNIEnv* env, jobject jvm, jlong event_type_id, jlong cutoff_ticks))
172 return JfrEventSetting::set_cutoff(event_type_id, cutoff_ticks) ? JNI_TRUE : JNI_FALSE;
173 NO_TRANSITION_END
174
175
176 /*
177 * JVM_ENTRY_NO_ENV entries
178 *
179 * Transitions:
180 * Entry: _thread_in_native -> _thread_in_vm
181 * Exit: _thread_in_vm -> _thread_in_native
182 *
183 * Current JavaThread available as "thread" variable
184 */
185
186 JVM_ENTRY_NO_ENV(jboolean, jfr_create_jfr(JNIEnv* env, jobject jvm, jboolean simulate_failure))
187 if (JfrRecorder::is_created()) {
188 return JNI_TRUE;
189 }
190 if (!JfrRecorder::create(simulate_failure == JNI_TRUE)) {
191 JfrJavaSupport::throw_illegal_state_exception("Unable to start Jfr", thread);
192 return JNI_FALSE;
193 }
194 return JNI_TRUE;
195 JVM_END
196
197 JVM_ENTRY_NO_ENV(jboolean, jfr_destroy_jfr(JNIEnv* env, jobject jvm))
198 JfrRecorder::destroy();
199 return JNI_TRUE;
200 JVM_END
201
202 JVM_ENTRY_NO_ENV(void, jfr_begin_recording(JNIEnv* env, jobject jvm))
203 if (JfrRecorder::is_recording()) {
204 return;
205 }
206 JfrRecorder::start_recording();
207 JVM_END
208
209 JVM_ENTRY_NO_ENV(void, jfr_end_recording(JNIEnv* env, jobject jvm))
210 if (!JfrRecorder::is_recording()) {
211 return;
212 }
213 JfrRecorder::stop_recording();
214 JVM_END
215
216
217 JVM_ENTRY_NO_ENV(jboolean, jfr_emit_event(JNIEnv* env, jobject jvm, jlong eventTypeId, jlong timeStamp, jlong when))
218 JfrPeriodicEventSet::requestEvent((JfrEventId)eventTypeId);
219 return thread->has_pending_exception() ? JNI_FALSE : JNI_TRUE;
220 JVM_END
221
222 JVM_ENTRY_NO_ENV(jobject, jfr_get_all_event_classes(JNIEnv* env, jobject jvm))
223 return JfrEventClasses::get_all_event_classes(thread);
224 JVM_END
225
226 JVM_ENTRY_NO_ENV(jlong, jfr_class_id(JNIEnv* env, jclass jvm, jclass jc))
227 return JfrTraceId::use(jc);
228 JVM_END
229
230 JVM_ENTRY_NO_ENV(jlong, jfr_stacktrace_id(JNIEnv* env, jobject jvm, jint skip))
231 return JfrStackTraceRepository::record(thread, skip);
232 JVM_END
233
234 JVM_ENTRY_NO_ENV(void, jfr_log(JNIEnv* env, jobject jvm, jint tag_set, jint level, jstring message))
235 JfrJavaLog::log(tag_set, level, message, thread);
236 JVM_END
237
238 JVM_ENTRY_NO_ENV(void, jfr_subscribe_log_level(JNIEnv* env, jobject jvm, jobject log_tag, jint id))
239 JfrJavaLog::subscribe_log_level(log_tag, id, thread);
240 JVM_END
241
242 JVM_ENTRY_NO_ENV(void, jfr_set_output(JNIEnv* env, jobject jvm, jstring path))
243 JfrRepository::set_chunk_path(path, thread);
244 JVM_END
245
246 JVM_ENTRY_NO_ENV(void, jfr_set_method_sampling_interval(JNIEnv* env, jobject jvm, jlong type, jlong intervalMillis))
247 if (intervalMillis < 0) {
248 intervalMillis = 0;
249 }
250 JfrEventId typed_event_id = (JfrEventId)type;
251 assert(EventExecutionSample::eventId == typed_event_id || EventNativeMethodSample::eventId == typed_event_id, "invariant");
252 if (intervalMillis > 0) {
253 JfrEventSetting::set_enabled(typed_event_id, true); // ensure sampling event is enabled
254 }
255 if (EventExecutionSample::eventId == type) {
256 JfrThreadSampling::set_java_sample_interval(intervalMillis);
257 } else {
258 JfrThreadSampling::set_native_sample_interval(intervalMillis);
259 }
260 JVM_END
261
262 JVM_ENTRY_NO_ENV(void, jfr_store_metadata_descriptor(JNIEnv* env, jobject jvm, jbyteArray descriptor))
263 JfrMetadataEvent::update(descriptor);
264 JVM_END
265
266 // trace thread id for a thread object
267 JVM_ENTRY_NO_ENV(jlong, jfr_id_for_thread(JNIEnv* env, jobject jvm, jobject t))
268 return JfrJavaSupport::jfr_thread_id(t);
269 JVM_END
270
271 JVM_ENTRY_NO_ENV(jobject, jfr_get_event_writer(JNIEnv* env, jclass cls))
272 return JfrJavaEventWriter::event_writer(thread);
273 JVM_END
274
275 JVM_ENTRY_NO_ENV(jobject, jfr_new_event_writer(JNIEnv* env, jclass cls))
276 return JfrJavaEventWriter::new_event_writer(thread);
277 JVM_END
278
279 JVM_ENTRY_NO_ENV(jboolean, jfr_event_writer_flush(JNIEnv* env, jclass cls, jobject writer, jint used_size, jint requested_size))
280 return JfrJavaEventWriter::flush(writer, used_size, requested_size, thread);
281 JVM_END
282
283 JVM_ENTRY_NO_ENV(void, jfr_set_repository_location(JNIEnv* env, jobject repo, jstring location))
284 return JfrRepository::set_path(location, thread);
285 JVM_END
286
287 JVM_ENTRY_NO_ENV(void, jfr_uncaught_exception(JNIEnv* env, jobject jvm, jobject t, jthrowable throwable))
288 JfrJavaSupport::uncaught_exception(throwable, thread);
289 JVM_END
290
291 JVM_ENTRY_NO_ENV(void, jfr_abort(JNIEnv* env, jobject jvm, jstring errorMsg))
292 JfrJavaSupport::abort(errorMsg, thread);
293 JVM_END
294
295 JVM_ENTRY_NO_ENV(jlong, jfr_type_id(JNIEnv* env, jobject jvm, jclass jc))
296 return JfrTraceId::get(jc);
297 JVM_END
298
299 JVM_ENTRY_NO_ENV(jboolean, jfr_add_string_constant(JNIEnv* env, jclass jvm, jboolean epoch, jlong id, jstring string))
300 return JfrStringPool::add(epoch == JNI_TRUE, id, string, thread) ? JNI_TRUE : JNI_FALSE;
301 JVM_END
302
303 JVM_ENTRY_NO_ENV(void, jfr_set_force_instrumentation(JNIEnv* env, jobject jvm, jboolean force_instrumentation))
304 JfrEventClassTransformer::set_force_instrumentation(force_instrumentation == JNI_TRUE);
305 JVM_END
306
307 JVM_ENTRY_NO_ENV(void, jfr_emit_old_object_samples(JNIEnv* env, jobject jvm, jlong cutoff_ticks, jboolean emit_all))
308 LeakProfiler::emit_events(cutoff_ticks, emit_all == JNI_TRUE);
309 JVM_END