94 lines
3.0 KiB
C++
94 lines
3.0 KiB
C++
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/* Copyright (C) 2017 The Android Open Source Project
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This file implements interfaces from the file jvmti.h. This implementation
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* is licensed under the same terms as the file jvmti.h. The
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* copyright and license information for the file jvmti.h follows.
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*
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* Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#include "ti_timers.h"
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#include <limits>
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#ifndef __APPLE__
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#include <time.h>
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#else
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#include <sys/time.h>
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#endif
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#include <unistd.h>
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#include "art_jvmti.h"
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#include "base/macros.h"
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namespace openjdkjvmti {
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jvmtiError TimerUtil::GetAvailableProcessors(jvmtiEnv* env ATTRIBUTE_UNUSED,
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jint* processor_count_ptr) {
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if (processor_count_ptr == nullptr) {
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return ERR(NULL_POINTER);
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}
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*processor_count_ptr = static_cast<jint>(sysconf(_SC_NPROCESSORS_CONF));
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return ERR(NONE);
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}
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jvmtiError TimerUtil::GetTimerInfo(jvmtiEnv* env ATTRIBUTE_UNUSED, jvmtiTimerInfo* info_ptr) {
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if (info_ptr == nullptr) {
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return ERR(NULL_POINTER);
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}
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info_ptr->max_value = static_cast<jlong>(std::numeric_limits<uint64_t>::max());
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info_ptr->may_skip_forward = JNI_TRUE;
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info_ptr->may_skip_backward = JNI_TRUE;
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info_ptr->kind = jvmtiTimerKind::JVMTI_TIMER_ELAPSED;
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return ERR(NONE);
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}
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jvmtiError TimerUtil::GetTime(jvmtiEnv* env ATTRIBUTE_UNUSED, jlong* nanos_ptr) {
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if (nanos_ptr == nullptr) {
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return ERR(NULL_POINTER);
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}
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#ifndef __APPLE__
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// Use the same implementation as System.nanoTime.
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struct timespec now;
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clock_gettime(CLOCK_MONOTONIC, &now);
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*nanos_ptr = now.tv_sec * 1000000000LL + now.tv_nsec;
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#else
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// No CLOCK_MONOTONIC support on older Mac OS.
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struct timeval t;
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t.tv_sec = t.tv_usec = 0;
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gettimeofday(&t, nullptr);
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*nanos_ptr = static_cast<jlong>(t.tv_sec)*1000000000LL + static_cast<jlong>(t.tv_usec)*1000LL;
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#endif
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return ERR(NONE);
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}
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} // namespace openjdkjvmti
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