jdk8-mips64-public/hotspot: src/share/vm/prims/perf.cpp@710a3c8b516e (annotated)

src/share/vm/prims/perf.cpp@710a3c8b516e (annotated)

src/share/vm/prims/perf.cpp

Tue, 08 Aug 2017 15:57:29 +0800

author: aoqi
date: Tue, 08 Aug 2017 15:57:29 +0800
changeset 6876: 710a3c8b516e
parent 6198: 55fb97c4c58d
parent 0: f90c822e73f8
child 9448: 73d689add964
permissions: -rw-r--r--

merge

 /*
  * 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

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/prims/perf.cpp@710a3c8b516e (annotated)

src/share/vm/prims/perf.cpp