| /* |
| * Copyright (c) 2001, 2013, 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. |
| * |
| * 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 "precompiled.hpp" |
| #include "classfile/vmSymbols.hpp" |
| #include "memory/allocation.inline.hpp" |
| #include "memory/resourceArea.hpp" |
| #include "oops/oop.inline.hpp" |
| #include "prims/jni.h" |
| #include "prims/jvm.h" |
| #include "runtime/interfaceSupport.hpp" |
| #include "runtime/perfData.hpp" |
| #include "runtime/perfMemory.hpp" |
| |
| /* |
| * Implementation of class sun.misc.Perf |
| */ |
| |
| |
| #define PERF_ENTRY(result_type, header) \ |
| JVM_ENTRY(result_type, header) |
| |
| #define PERF_END JVM_END |
| |
| #define PerfWrapper(arg) /* Unimplemented at this time */ |
| |
| static char* jstr_to_utf(JNIEnv *env, jstring str, TRAPS) { |
| |
| char* utfstr = NULL; |
| |
| if (str == NULL) { |
| THROW_0(vmSymbols::java_lang_NullPointerException()); |
| //throw_new(env,"NullPointerException"); |
| } |
| |
| int len = env->GetStringUTFLength(str); |
| int unicode_len = env->GetStringLength(str); |
| |
| utfstr = NEW_RESOURCE_ARRAY(char, len + 1); |
| |
| env->GetStringUTFRegion(str, 0, unicode_len, utfstr); |
| |
| return utfstr; |
| } |
| |
| PERF_ENTRY(jobject, Perf_Attach(JNIEnv *env, jobject unused, jstring user, int vmid, int mode)) |
| |
| PerfWrapper("Perf_Attach"); |
| |
| char* address = 0; |
| size_t capacity = 0; |
| const char* user_utf = NULL; |
| |
| ResourceMark rm; |
| |
| { |
| ThreadToNativeFromVM ttnfv(thread); |
| |
| user_utf = user == NULL ? NULL : jstr_to_utf(env, user, CHECK_NULL); |
| } |
| |
| if (mode != PerfMemory::PERF_MODE_RO && |
| mode != PerfMemory::PERF_MODE_RW) { |
| THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
| } |
| |
| // attach to the PerfData memory region for the specified VM |
| PerfMemory::attach(user_utf, vmid, (PerfMemory::PerfMemoryMode) mode, |
| &address, &capacity, CHECK_NULL); |
| |
| { |
| ThreadToNativeFromVM ttnfv(thread); |
| return env->NewDirectByteBuffer(address, (jlong)capacity); |
| } |
| |
| PERF_END |
| |
| PERF_ENTRY(void, Perf_Detach(JNIEnv *env, jobject unused, jobject buffer)) |
| |
| PerfWrapper("Perf_Detach"); |
| |
| void* address = 0; |
| jlong capacity = 0; |
| |
| // get buffer address and capacity |
| { |
| ThreadToNativeFromVM ttnfv(thread); |
| address = env->GetDirectBufferAddress(buffer); |
| capacity = env->GetDirectBufferCapacity(buffer); |
| } |
| |
| PerfMemory::detach((char*)address, capacity, CHECK); |
| |
| PERF_END |
| |
| PERF_ENTRY(jobject, Perf_CreateLong(JNIEnv *env, jobject perf, jstring name, |
| int variability, int units, jlong value)) |
| |
| PerfWrapper("Perf_CreateLong"); |
| |
| char* name_utf = NULL; |
| |
| if (units <= 0 || units > PerfData::U_Last) { |
| debug_only(warning("unexpected units argument, units = %d", units)); |
| THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
| } |
| |
| ResourceMark rm; |
| |
| { |
| ThreadToNativeFromVM ttnfv(thread); |
| |
| name_utf = jstr_to_utf(env, name, CHECK_NULL); |
| } |
| |
| PerfLong* pl = NULL; |
| |
| // check that the PerfData name doesn't already exist |
| if (PerfDataManager::exists(name_utf)) { |
| THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "PerfLong name already exists"); |
| } |
| |
| switch(variability) { |
| case PerfData::V_Constant: |
| pl = PerfDataManager::create_long_constant(NULL_NS, (char *)name_utf, |
| (PerfData::Units)units, value, |
| CHECK_NULL); |
| break; |
| |
| case PerfData::V_Monotonic: |
| pl = PerfDataManager::create_long_counter(NULL_NS, (char *)name_utf, |
| (PerfData::Units)units, value, |
| CHECK_NULL); |
| break; |
| |
| case PerfData::V_Variable: |
| pl = PerfDataManager::create_long_variable(NULL_NS, (char *)name_utf, |
| (PerfData::Units)units, value, |
| CHECK_NULL); |
| break; |
| |
| default: /* Illegal Argument */ |
| debug_only(warning("unexpected variability value: %d", variability)); |
| THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
| break; |
| } |
| |
| long* lp = (long*)pl->get_address(); |
| |
| { |
| ThreadToNativeFromVM ttnfv(thread); |
| return env->NewDirectByteBuffer(lp, sizeof(jlong)); |
| } |
| |
| PERF_END |
| |
| PERF_ENTRY(jobject, Perf_CreateByteArray(JNIEnv *env, jobject perf, |
| jstring name, jint variability, |
| jint units, jbyteArray value, |
| jint maxlength)) |
| |
| PerfWrapper("Perf_CreateByteArray"); |
| |
| // check for valid byte array objects |
| if (name == NULL || value == NULL) { |
| THROW_0(vmSymbols::java_lang_NullPointerException()); |
| } |
| |
| // check for valid variability classification |
| if (variability != PerfData::V_Constant && |
| variability != PerfData::V_Variable) { |
| debug_only(warning("unexpected variability value: %d", variability)); |
| THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
| } |
| |
| // check for valid units |
| if (units != PerfData::U_String) { |
| // only String based ByteArray objects are currently supported |
| debug_only(warning("unexpected units value: %d", variability)); |
| THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
| } |
| |
| int value_length; |
| char* name_utf = NULL; |
| jbyte* value_local = NULL; |
| |
| ResourceMark rm; |
| |
| { |
| ThreadToNativeFromVM ttnfv(thread); |
| |
| name_utf = jstr_to_utf(env, name, CHECK_NULL); |
| |
| value_length = env->GetArrayLength(value); |
| |
| value_local = NEW_RESOURCE_ARRAY(jbyte, value_length + 1); |
| |
| env->GetByteArrayRegion(value, 0, value_length, value_local); |
| } |
| |
| // check that the counter name doesn't already exist |
| if (PerfDataManager::exists((char*)name_utf)) { |
| THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "PerfByteArray name already exists"); |
| } |
| |
| PerfByteArray* pbv = NULL; |
| |
| if (units == PerfData::U_String) { |
| |
| if (variability == PerfData::V_Constant) { |
| // create the string constant |
| pbv = PerfDataManager::create_string_constant(NULL_NS, (char*)name_utf, |
| (char*)value_local, |
| CHECK_NULL); |
| |
| assert(maxlength == value_length, "string constant length should be == maxlength"); |
| maxlength = value_length; |
| } |
| else { |
| |
| // create the string variable |
| pbv = PerfDataManager::create_string_variable(NULL_NS, (char*)name_utf, |
| maxlength, |
| (char*)value_local, |
| CHECK_NULL); |
| |
| assert(maxlength >= value_length,"string variable length should be <= maxlength"); |
| } |
| } |
| |
| char* cp = (char*)pbv->get_address(); |
| |
| { |
| ThreadToNativeFromVM ttnfv(thread); |
| return env->NewDirectByteBuffer(cp, maxlength+1); |
| } |
| |
| PERF_END |
| |
| PERF_ENTRY(jlong, Perf_HighResCounter(JNIEnv *env, jobject perf)) |
| |
| PerfWrapper("Perf_HighResCounter"); |
| |
| // this should be a method in java.lang.System. This value could |
| // be acquired through access to a PerfData performance counter, but |
| // doing so would require that the PerfData monitoring overhead be |
| // incurred by all Java applications, which is unacceptable. |
| |
| return os::elapsed_counter(); |
| |
| PERF_END |
| |
| PERF_ENTRY(jlong, Perf_HighResFrequency(JNIEnv *env, jobject perf)) |
| |
| PerfWrapper("Perf_HighResFrequency"); |
| |
| // this should be a method in java.lang.System. This value could |
| // be acquired through access to a PerfData performance counter, but |
| // doing so would require that the PerfData monitoring overhead be |
| // incurred by all Java applications, which is unacceptable. |
| |
| return os::elapsed_frequency(); |
| |
| PERF_END |
| |
| /// JVM_RegisterPerfMethods |
| |
| #define CC (char*) /*cast a literal from (const char*)*/ |
| #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) |
| #define BB "Ljava/nio/ByteBuffer;" |
| #define JLS "Ljava/lang/String;" |
| #define CL_ARGS CC"("JLS"IIJ)"BB |
| #define CBA_ARGS CC"("JLS"II[BI)"BB |
| |
| static JNINativeMethod perfmethods[] = { |
| |
| {CC"attach", CC"("JLS"II)"BB, FN_PTR(Perf_Attach)}, |
| {CC"detach", CC"("BB")V", FN_PTR(Perf_Detach)}, |
| {CC"createLong", CL_ARGS, FN_PTR(Perf_CreateLong)}, |
| {CC"createByteArray", CBA_ARGS, FN_PTR(Perf_CreateByteArray)}, |
| {CC"highResCounter", CC"()J", FN_PTR(Perf_HighResCounter)}, |
| {CC"highResFrequency", CC"()J", FN_PTR(Perf_HighResFrequency)} |
| }; |
| |
| #undef CBA_ARGS |
| #undef CL_ARGS |
| #undef JLS |
| #undef BB |
| #undef FN_PTR |
| #undef CC |
| |
| // This one function is exported, used by NativeLookup. |
| JVM_ENTRY(void, JVM_RegisterPerfMethods(JNIEnv *env, jclass perfclass)) |
| PerfWrapper("JVM_RegisterPerfMethods"); |
| { |
| ThreadToNativeFromVM ttnfv(thread); |
| int ok = env->RegisterNatives(perfclass, perfmethods, sizeof(perfmethods)/sizeof(JNINativeMethod)); |
| guarantee(ok == 0, "register perf natives"); |
| } |
| JVM_END |