| Andreas Gampe | 35bcf81 | 2017-01-13 16:24:17 -0800 | [diff] [blame^] | 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 | #include <time.h> |
| 37 | #include <unistd.h> |
| 38 | |
| 39 | #include "art_jvmti.h" |
| 40 | #include "base/macros.h" |
| 41 | |
| 42 | namespace openjdkjvmti { |
| 43 | |
| 44 | jvmtiError TimerUtil::GetAvailableProcessors(jvmtiEnv* env ATTRIBUTE_UNUSED, |
| 45 | jint* processor_count_ptr) { |
| 46 | if (processor_count_ptr == nullptr) { |
| 47 | return ERR(NULL_POINTER); |
| 48 | } |
| 49 | |
| 50 | *processor_count_ptr = static_cast<jint>(sysconf(_SC_NPROCESSORS_CONF)); |
| 51 | |
| 52 | return ERR(NONE); |
| 53 | } |
| 54 | |
| 55 | jvmtiError TimerUtil::GetTimerInfo(jvmtiEnv* env ATTRIBUTE_UNUSED, jvmtiTimerInfo* info_ptr) { |
| 56 | if (info_ptr == nullptr) { |
| 57 | return ERR(NULL_POINTER); |
| 58 | } |
| 59 | |
| 60 | info_ptr->max_value = static_cast<jlong>(std::numeric_limits<uint64_t>::max()); |
| 61 | info_ptr->may_skip_forward = JNI_TRUE; |
| 62 | info_ptr->may_skip_backward = JNI_TRUE; |
| 63 | info_ptr->kind = jvmtiTimerKind::JVMTI_TIMER_ELAPSED; |
| 64 | |
| 65 | return ERR(NONE); |
| 66 | } |
| 67 | |
| 68 | jvmtiError TimerUtil::GetTime(jvmtiEnv* env ATTRIBUTE_UNUSED, jlong* nanos_ptr) { |
| 69 | if (nanos_ptr == nullptr) { |
| 70 | return ERR(NULL_POINTER); |
| 71 | } |
| 72 | |
| 73 | // Use the same implementation as System.nanoTime. |
| 74 | struct timespec now; |
| 75 | clock_gettime(CLOCK_MONOTONIC, &now); |
| 76 | *nanos_ptr = now.tv_sec * 1000000000LL + now.tv_nsec; |
| 77 | |
| 78 | return ERR(NONE); |
| 79 | } |
| 80 | |
| 81 | } // namespace openjdkjvmti |