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