1 /* Copyright (C) 2017 The Android Open Source Project
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3 *
4 * This file implements interfaces from the file jvmti.h. This implementation
5 * is licensed under the same terms as the file jvmti.h. The
6 * copyright and license information for the file jvmti.h follows.
7 *
8 * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
9 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
10 *
11 * This code is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License version 2 only, as
13 * published by the Free Software Foundation. Oracle designates this
14 * particular file as subject to the "Classpath" exception as provided
15 * by Oracle in the LICENSE file that accompanied this code.
16 *
17 * This code is distributed in the hope that it will be useful, but WITHOUT
18 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
19 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
20 * version 2 for more details (a copy is included in the LICENSE file that
21 * accompanied this code).
22 *
23 * You should have received a copy of the GNU General Public License version
24 * 2 along with this work; if not, write to the Free Software Foundation,
25 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
26 *
27 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
28 * or visit www.oracle.com if you need additional information or have any
29 * questions.
30 */
31
32 #include "ti_timers.h"
33
34 #include <limits>
35
36 #ifndef __APPLE__
37 #include <time.h>
38 #else
39 #include <sys/time.h>
40 #endif
41 #include <unistd.h>
42
43 #include "art_jvmti.h"
44 #include "base/macros.h"
45
46 namespace openjdkjvmti {
47
GetAvailableProcessors(jvmtiEnv * env ATTRIBUTE_UNUSED,jint * processor_count_ptr)48 jvmtiError TimerUtil::GetAvailableProcessors(jvmtiEnv* env ATTRIBUTE_UNUSED,
49 jint* processor_count_ptr) {
50 if (processor_count_ptr == nullptr) {
51 return ERR(NULL_POINTER);
52 }
53
54 *processor_count_ptr = static_cast<jint>(sysconf(_SC_NPROCESSORS_CONF));
55
56 return ERR(NONE);
57 }
58
GetTimerInfo(jvmtiEnv * env ATTRIBUTE_UNUSED,jvmtiTimerInfo * info_ptr)59 jvmtiError TimerUtil::GetTimerInfo(jvmtiEnv* env ATTRIBUTE_UNUSED, jvmtiTimerInfo* info_ptr) {
60 if (info_ptr == nullptr) {
61 return ERR(NULL_POINTER);
62 }
63
64 info_ptr->max_value = static_cast<jlong>(std::numeric_limits<uint64_t>::max());
65 info_ptr->may_skip_forward = JNI_TRUE;
66 info_ptr->may_skip_backward = JNI_TRUE;
67 info_ptr->kind = jvmtiTimerKind::JVMTI_TIMER_ELAPSED;
68
69 return ERR(NONE);
70 }
71
GetTime(jvmtiEnv * env ATTRIBUTE_UNUSED,jlong * nanos_ptr)72 jvmtiError TimerUtil::GetTime(jvmtiEnv* env ATTRIBUTE_UNUSED, jlong* nanos_ptr) {
73 if (nanos_ptr == nullptr) {
74 return ERR(NULL_POINTER);
75 }
76
77 #ifndef __APPLE__
78 // Use the same implementation as System.nanoTime.
79 struct timespec now;
80 clock_gettime(CLOCK_MONOTONIC, &now);
81 *nanos_ptr = now.tv_sec * 1000000000LL + now.tv_nsec;
82 #else
83 // No CLOCK_MONOTONIC support on older Mac OS.
84 struct timeval t;
85 t.tv_sec = t.tv_usec = 0;
86 gettimeofday(&t, nullptr);
87 *nanos_ptr = static_cast<jlong>(t.tv_sec)*1000000000LL + static_cast<jlong>(t.tv_usec)*1000LL;
88 #endif
89
90 return ERR(NONE);
91 }
92
93 } // namespace openjdkjvmti
94