duke@435: /*
stefank@2314:  * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
stefank@2314: #include "precompiled.hpp"
stefank@2314: #include "classfile/vmSymbols.hpp"
stefank@2314: #include "memory/allocation.inline.hpp"
stefank@2314: #include "memory/resourceArea.hpp"
stefank@2314: #include "oops/oop.inline.hpp"
stefank@2314: #include "prims/jni.h"
stefank@2314: #include "prims/jvm.h"
stefank@2314: #include "runtime/interfaceSupport.hpp"
stefank@2314: #include "runtime/perfData.hpp"
stefank@2314: #include "runtime/perfMemory.hpp"
stefank@2314: 
duke@435: /*
duke@435:  *      Implementation of class sun.misc.Perf
duke@435:  */
duke@435: 
duke@435: 
duke@435: #define PERF_ENTRY(result_type, header) \
duke@435:   JVM_ENTRY(result_type, header)
duke@435: 
duke@435: #define PERF_END JVM_END
duke@435: 
duke@435: #define PerfWrapper(arg) /* Unimplemented at this time */
duke@435: 
duke@435: static char* jstr_to_utf(JNIEnv *env, jstring str, TRAPS) {
duke@435: 
duke@435:   char* utfstr = NULL;
duke@435: 
duke@435:   if (str == NULL) {
duke@435:     THROW_0(vmSymbols::java_lang_NullPointerException());
duke@435:     //throw_new(env,"NullPointerException");
duke@435:   }
duke@435: 
duke@435:   int len = env->GetStringUTFLength(str);
duke@435:   int unicode_len = env->GetStringLength(str);
duke@435: 
duke@435:   utfstr = NEW_RESOURCE_ARRAY(char, len + 1);
duke@435: 
duke@435:   env->GetStringUTFRegion(str, 0, unicode_len, utfstr);
duke@435: 
duke@435:   return utfstr;
duke@435: }
duke@435: 
duke@435: PERF_ENTRY(jobject, Perf_Attach(JNIEnv *env, jobject unused, jstring user, int vmid, int mode))
duke@435: 
duke@435:   PerfWrapper("Perf_Attach");
duke@435: 
duke@435:   char* address = 0;
duke@435:   size_t capacity = 0;
duke@435:   const char* user_utf = NULL;
duke@435: 
duke@435:   ResourceMark rm;
duke@435: 
duke@435:   {
duke@435:     ThreadToNativeFromVM ttnfv(thread);
duke@435: 
duke@435:     user_utf = user == NULL ? NULL : jstr_to_utf(env, user, CHECK_NULL);
duke@435:   }
duke@435: 
duke@435:   if (mode != PerfMemory::PERF_MODE_RO &&
duke@435:       mode != PerfMemory::PERF_MODE_RW) {
duke@435:     THROW_0(vmSymbols::java_lang_IllegalArgumentException());
duke@435:   }
duke@435: 
duke@435:   // attach to the PerfData memory region for the specified VM
duke@435:   PerfMemory::attach(user_utf, vmid, (PerfMemory::PerfMemoryMode) mode,
duke@435:                      &address, &capacity, CHECK_NULL);
duke@435: 
duke@435:   {
duke@435:     ThreadToNativeFromVM ttnfv(thread);
duke@435:     return env->NewDirectByteBuffer(address, (jlong)capacity);
duke@435:   }
duke@435: 
duke@435: PERF_END
duke@435: 
duke@435: PERF_ENTRY(void, Perf_Detach(JNIEnv *env, jobject unused, jobject buffer))
duke@435: 
duke@435:   PerfWrapper("Perf_Detach");
duke@435: 
duke@435:   void* address = 0;
duke@435:   jlong capacity = 0;
duke@435: 
duke@435:   // get buffer address and capacity
duke@435:   {
duke@435:    ThreadToNativeFromVM ttnfv(thread);
duke@435:    address = env->GetDirectBufferAddress(buffer);
duke@435:    capacity = env->GetDirectBufferCapacity(buffer);
duke@435:   }
duke@435: 
duke@435:   PerfMemory::detach((char*)address, capacity, CHECK);
duke@435: 
duke@435: PERF_END
duke@435: 
duke@435: PERF_ENTRY(jobject, Perf_CreateLong(JNIEnv *env, jobject perf, jstring name,
duke@435:            int variability, int units, jlong value))
duke@435: 
duke@435:   PerfWrapper("Perf_CreateLong");
duke@435: 
duke@435:   char* name_utf = NULL;
duke@435: 
duke@435:   if (units <= 0 || units > PerfData::U_Last) {
duke@435:     debug_only(warning("unexpected units argument, units = %d", units));
duke@435:     THROW_0(vmSymbols::java_lang_IllegalArgumentException());
duke@435:   }
duke@435: 
duke@435:   ResourceMark rm;
duke@435: 
duke@435:   {
duke@435:     ThreadToNativeFromVM ttnfv(thread);
duke@435: 
duke@435:     name_utf = jstr_to_utf(env, name, CHECK_NULL);
duke@435:   }
duke@435: 
duke@435:   PerfLong* pl = NULL;
duke@435: 
duke@435:   // check that the PerfData name doesn't already exist
duke@435:   if (PerfDataManager::exists(name_utf)) {
duke@435:     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "PerfLong name already exists");
duke@435:   }
duke@435: 
duke@435:   switch(variability) {
ccheung@5049:   case PerfData::V_Constant:
duke@435:     pl = PerfDataManager::create_long_constant(NULL_NS, (char *)name_utf,
duke@435:                                                (PerfData::Units)units, value,
duke@435:                                                CHECK_NULL);
duke@435:     break;
duke@435: 
ccheung@5049:   case PerfData::V_Monotonic:
ccheung@5049:     pl = PerfDataManager::create_long_counter(NULL_NS, (char *)name_utf,
duke@435:                                                (PerfData::Units)units, value,
duke@435:                                                CHECK_NULL);
duke@435:     break;
duke@435: 
ccheung@5049:   case PerfData::V_Variable:
ccheung@5049:     pl = PerfDataManager::create_long_variable(NULL_NS, (char *)name_utf,
duke@435:                                               (PerfData::Units)units, value,
duke@435:                                               CHECK_NULL);
duke@435:     break;
duke@435: 
duke@435:   default: /* Illegal Argument */
duke@435:     debug_only(warning("unexpected variability value: %d", variability));
duke@435:     THROW_0(vmSymbols::java_lang_IllegalArgumentException());
duke@435:     break;
duke@435:   }
duke@435: 
duke@435:   long* lp = (long*)pl->get_address();
duke@435: 
duke@435:   {
duke@435:     ThreadToNativeFromVM ttnfv(thread);
duke@435:     return env->NewDirectByteBuffer(lp, sizeof(jlong));
duke@435:   }
duke@435: 
duke@435: PERF_END
duke@435: 
duke@435: PERF_ENTRY(jobject, Perf_CreateByteArray(JNIEnv *env, jobject perf,
duke@435:                                          jstring name, jint variability,
duke@435:                                          jint units, jbyteArray value,
duke@435:                                          jint maxlength))
duke@435: 
duke@435:   PerfWrapper("Perf_CreateByteArray");
duke@435: 
duke@435:   // check for valid byte array objects
duke@435:   if (name == NULL || value == NULL) {
duke@435:     THROW_0(vmSymbols::java_lang_NullPointerException());
duke@435:   }
duke@435: 
duke@435:   // check for valid variability classification
duke@435:   if (variability != PerfData::V_Constant &&
duke@435:       variability != PerfData::V_Variable) {
duke@435:     debug_only(warning("unexpected variability value: %d", variability));
duke@435:     THROW_0(vmSymbols::java_lang_IllegalArgumentException());
duke@435:   }
duke@435: 
duke@435:   // check for valid units
duke@435:   if (units != PerfData::U_String) {
duke@435:     // only String based ByteArray objects are currently supported
duke@435:     debug_only(warning("unexpected units value: %d", variability));
duke@435:     THROW_0(vmSymbols::java_lang_IllegalArgumentException());
duke@435:   }
duke@435: 
duke@435:   int value_length;
duke@435:   char* name_utf = NULL;
duke@435:   jbyte* value_local = NULL;
duke@435: 
duke@435:   ResourceMark rm;
duke@435: 
duke@435:   {
duke@435:     ThreadToNativeFromVM ttnfv(thread);
duke@435: 
duke@435:     name_utf = jstr_to_utf(env, name, CHECK_NULL);
duke@435: 
duke@435:     value_length = env->GetArrayLength(value);
duke@435: 
duke@435:     value_local = NEW_RESOURCE_ARRAY(jbyte, value_length + 1);
duke@435: 
duke@435:     env->GetByteArrayRegion(value, 0, value_length, value_local);
duke@435:   }
duke@435: 
duke@435:   // check that the counter name doesn't already exist
duke@435:   if (PerfDataManager::exists((char*)name_utf)) {
duke@435:     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "PerfByteArray name already exists");
duke@435:   }
duke@435: 
duke@435:   PerfByteArray* pbv = NULL;
duke@435: 
duke@435:   if (units == PerfData::U_String) {
duke@435: 
duke@435:     if (variability == PerfData::V_Constant) {
duke@435:       // create the string constant
duke@435:       pbv = PerfDataManager::create_string_constant(NULL_NS, (char*)name_utf,
duke@435:                                                     (char*)value_local,
duke@435:                                                     CHECK_NULL);
duke@435: 
duke@435:       assert(maxlength == value_length, "string constant length should be == maxlength");
duke@435:       maxlength = value_length;
duke@435:     }
duke@435:     else {
duke@435: 
duke@435:       // create the string variable
duke@435:       pbv = PerfDataManager::create_string_variable(NULL_NS, (char*)name_utf,
duke@435:                                                     maxlength,
duke@435:                                                     (char*)value_local,
duke@435:                                                     CHECK_NULL);
duke@435: 
duke@435:      assert(maxlength >= value_length,"string variable length should be <= maxlength");
duke@435:     }
duke@435:   }
duke@435: 
duke@435:   char* cp = (char*)pbv->get_address();
duke@435: 
duke@435:   {
duke@435:     ThreadToNativeFromVM ttnfv(thread);
duke@435:     return env->NewDirectByteBuffer(cp, maxlength+1);
duke@435:   }
duke@435: 
duke@435: PERF_END
duke@435: 
duke@435: PERF_ENTRY(jlong, Perf_HighResCounter(JNIEnv *env, jobject perf))
duke@435: 
duke@435:   PerfWrapper("Perf_HighResCounter");
duke@435: 
duke@435:   // this should be a method in java.lang.System. This value could
duke@435:   // be acquired through access to a PerfData performance counter, but
duke@435:   // doing so would require that the PerfData monitoring overhead be
duke@435:   // incurred by all Java applications, which is unacceptable.
duke@435: 
duke@435:   return os::elapsed_counter();
duke@435: 
duke@435: PERF_END
duke@435: 
duke@435: PERF_ENTRY(jlong, Perf_HighResFrequency(JNIEnv *env, jobject perf))
duke@435: 
duke@435:   PerfWrapper("Perf_HighResFrequency");
duke@435: 
duke@435:   // this should be a method in java.lang.System. This value could
duke@435:   // be acquired through access to a PerfData performance counter, but
duke@435:   // doing so would require that the PerfData monitoring overhead be
duke@435:   // incurred by all Java applications, which is unacceptable.
duke@435: 
duke@435:   return os::elapsed_frequency();
duke@435: 
duke@435: PERF_END
duke@435: 
duke@435: /// JVM_RegisterPerfMethods
duke@435: 
duke@435: #define CC (char*)  /*cast a literal from (const char*)*/
duke@435: #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f)
duke@435: #define BB "Ljava/nio/ByteBuffer;"
duke@435: #define JLS "Ljava/lang/String;"
duke@435: #define CL_ARGS     CC"("JLS"IIJ)"BB
duke@435: #define CBA_ARGS    CC"("JLS"II[BI)"BB
duke@435: 
duke@435: static JNINativeMethod perfmethods[] = {
duke@435: 
duke@435:   {CC"attach",              CC"("JLS"II)"BB,  FN_PTR(Perf_Attach)},
duke@435:   {CC"detach",              CC"("BB")V",      FN_PTR(Perf_Detach)},
duke@435:   {CC"createLong",          CL_ARGS,          FN_PTR(Perf_CreateLong)},
duke@435:   {CC"createByteArray",     CBA_ARGS,         FN_PTR(Perf_CreateByteArray)},
duke@435:   {CC"highResCounter",      CC"()J",          FN_PTR(Perf_HighResCounter)},
duke@435:   {CC"highResFrequency",    CC"()J",          FN_PTR(Perf_HighResFrequency)}
duke@435: };
duke@435: 
duke@435: #undef CBA_ARGS
duke@435: #undef CL_ARGS
duke@435: #undef JLS
duke@435: #undef BB
duke@435: #undef FN_PTR
duke@435: #undef CC
duke@435: 
duke@435: // This one function is exported, used by NativeLookup.
duke@435: JVM_ENTRY(void, JVM_RegisterPerfMethods(JNIEnv *env, jclass perfclass))
duke@435:   PerfWrapper("JVM_RegisterPerfMethods");
duke@435:   {
duke@435:     ThreadToNativeFromVM ttnfv(thread);
duke@435:     int ok = env->RegisterNatives(perfclass, perfmethods, sizeof(perfmethods)/sizeof(JNINativeMethod));
duke@435:     guarantee(ok == 0, "register perf natives");
duke@435:   }
duke@435: JVM_END