Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * Copyright (c) 2001, 2010, 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 "oops/oop.inline.hpp"

 #include "runtime/handles.inline.hpp"

 #include "runtime/java.hpp"

 #include "runtime/mutex.hpp"

 #include "runtime/mutexLocker.hpp"

 #include "runtime/os.hpp"

 #include "runtime/perfData.hpp"

 #include "utilities/exceptions.hpp"

 #include "utilities/globalDefinitions.hpp"

 PerfDataList*   PerfDataManager::_all = NULL;

 PerfDataList*   PerfDataManager::_sampled = NULL;

 PerfDataList*   PerfDataManager::_constants = NULL;

 /*

  * The jvmstat global and subsysem jvmstat counter name spaces. The top

  * level name spaces imply the interface stability level of the counter,

  * which generally follows the Java package, class, and property naming

  * conventions. The CounterNS enumeration values should be used to index

  * into this array.

  */

 const char* PerfDataManager::_name_spaces[] = {

   // top level name spaces

   "java",                   // stable and supported name space

   "com.sun",                // unstable but supported name space

   "sun",                    // unstable and unsupported name space

   // subsystem name spaces

   "java.gc",                // Garbage Collection name spaces

   "com.sun.gc",

   "sun.gc",

   "java.ci",                // Compiler name spaces

   "com.sun.ci",

   "sun.ci",

   "java.cls",               // Class Loader name spaces

   "com.sun.cls",

   "sun.cls",

   "java.rt",                // Runtime name spaces

   "com.sun.rt",

   "sun.rt",

   "java.os",                // Operating System name spaces

   "com.sun.os",

   "sun.os",

   "java.threads",           // Threads System name spaces

   "com.sun.threads",

   "sun.threads",

   "java.property",          // Java Property name spaces

   "com.sun.property",

   "sun.property",

   "",

 };

 PerfData::PerfData(CounterNS ns, const char* name, Units u, Variability v)

                   : _name(NULL), _u(u), _v(v), _valuep(NULL),

                     _on_c_heap(false) {

   const char* prefix = PerfDataManager::ns_to_string(ns);

   _name = NEW_C_HEAP_ARRAY(char, strlen(name) + strlen(prefix) + 2);

   assert(_name != NULL && strlen(name) != 0, "invalid name");

   if (ns == NULL_NS) {

      // No prefix is added to counters with the NULL_NS namespace.

      strcpy(_name, name);

      // set the F_Supported flag based on the counter name prefix.

      if (PerfDataManager::is_stable_supported(_name) ||

          PerfDataManager::is_unstable_supported(_name)) {

        _flags = F_Supported;

      }

      else {

        _flags = F_None;

      }

   }

   else {

     sprintf(_name, "%s.%s", prefix, name);

     // set the F_Supported flag based on the given namespace.

     if (PerfDataManager::is_stable_supported(ns) ||

         PerfDataManager::is_unstable_supported(ns)) {

       _flags = F_Supported;

     }

     else {

       _flags = F_None;

     }

   }

 }

 PerfData::~PerfData() {

   if (_name != NULL) {

     FREE_C_HEAP_ARRAY(char, _name);

   }

   if (is_on_c_heap()) {

     FREE_C_HEAP_ARRAY(PerfDataEntry, _pdep);

   }

 }

 void PerfData::create_entry(BasicType dtype, size_t dsize, size_t vlen) {

   size_t dlen = vlen==0 ? 1 : vlen;

   size_t namelen = strlen(name()) + 1;  // include null terminator

   size_t size = sizeof(PerfDataEntry) + namelen;

   size_t pad_length = ((size % dsize) == 0) ? 0 : dsize - (size % dsize);

   size += pad_length;

   size_t data_start = size;

   size += (dsize * dlen);

   // align size to assure allocation in units of 8 bytes

   int align = sizeof(jlong) - 1;

   size = ((size + align) & ~align);

   char* psmp = PerfMemory::alloc(size);

   if (psmp == NULL) {

     // out of PerfMemory memory resources. allocate on the C heap

     // to avoid vm termination.

     psmp = NEW_C_HEAP_ARRAY(char, size);

     _on_c_heap = true;

   }

   // compute the addresses for the name and data

   char* cname = psmp + sizeof(PerfDataEntry);

   // data is in the last dsize*dlen bytes of the entry

   void* valuep = (void*) (psmp + data_start);

   assert(is_on_c_heap() || PerfMemory::contains(cname), "just checking");

   assert(is_on_c_heap() || PerfMemory::contains((char*)valuep), "just checking");

   // copy the name, including null terminator, into PerfData memory

   strcpy(cname, name());

   // set the header values in PerfData memory

   PerfDataEntry* pdep = (PerfDataEntry*)psmp;

   pdep->entry_length = (jint)size;

   pdep->name_offset = (jint) ((uintptr_t) cname - (uintptr_t) psmp);

   pdep->vector_length = (jint)vlen;

   pdep->data_type = (jbyte) type2char(dtype);

   pdep->data_units = units();

   pdep->data_variability = variability();

   pdep->flags = (jbyte)flags();

   pdep->data_offset = (jint) data_start;

   if (PerfTraceDataCreation) {

     tty->print("name = %s, dtype = %d, variability = %d,"

                " units = %d, dsize = %d, vlen = %d,"

                " pad_length = %d, size = %d, on_c_heap = %s,"

                " address = " INTPTR_FORMAT ","

                " data address = " INTPTR_FORMAT "\n",

                cname, dtype, variability(),

                units(), dsize, vlen,

                pad_length, size, is_on_c_heap() ? "TRUE":"FALSE",

                psmp, valuep);

   }

   // record the start of the entry and the location of the data field.

   _pdep = pdep;

   _valuep = valuep;

   // mark the PerfData memory region as having been updated.

   PerfMemory::mark_updated();

 }

 PerfLong::PerfLong(CounterNS ns, const char* namep, Units u, Variability v)

                  : PerfData(ns, namep, u, v) {

   create_entry(T_LONG, sizeof(jlong));

 }

 int PerfLong::format(char* buffer, int length) {

   return jio_snprintf(buffer, length,"%lld", *(jlong*)_valuep);

 }

 PerfLongVariant::PerfLongVariant(CounterNS ns, const char* namep, Units u,

                                  Variability v, jlong* sampled)

                                 : PerfLong(ns, namep, u, v),

                                   _sampled(sampled), _sample_helper(NULL) {

   sample();

 }

 PerfLongVariant::PerfLongVariant(CounterNS ns, const char* namep, Units u,

                                  Variability v, PerfLongSampleHelper* helper)

                                 : PerfLong(ns, namep, u, v),

                                   _sampled(NULL), _sample_helper(helper) {

   sample();

 }

 void PerfLongVariant::sample() {

   assert(_sample_helper != NULL || _sampled != NULL, "unexpected state");

   if (_sample_helper != NULL) {

     *(jlong*)_valuep = _sample_helper->take_sample();

   }

   else if (_sampled != NULL) {

     *(jlong*)_valuep = *_sampled;

   }

 }

 PerfByteArray::PerfByteArray(CounterNS ns, const char* namep, Units u,

                              Variability v, jint length)

                             : PerfData(ns, namep, u, v), _length(length) {

   create_entry(T_BYTE, sizeof(jbyte), (size_t)_length);

 }

 void PerfString::set_string(const char* s2) {

   // copy n bytes of the string, assuring the null string is

   // copied if s2 == NULL.

   strncpy((char *)_valuep, s2 == NULL ? "" : s2, _length);

   // assure the string is null terminated when strlen(s2) >= _length

   ((char*)_valuep)[_length-1] = '\0';

 }

 int PerfString::format(char* buffer, int length) {

   return jio_snprintf(buffer, length, "%s", (char*)_valuep);

 }

 PerfStringConstant::PerfStringConstant(CounterNS ns, const char* namep,

                                        const char* initial_value)

                      : PerfString(ns, namep, V_Constant,

                                   initial_value == NULL ? 1 :

                                   MIN2((jint)(strlen((char*)initial_value)+1),

                                        (jint)(PerfMaxStringConstLength+1)),

                                   initial_value) {

   if (PrintMiscellaneous && Verbose) {

     if (is_valid() && initial_value != NULL &&

         ((jint)strlen(initial_value) > (jint)PerfMaxStringConstLength)) {

       warning("Truncating PerfStringConstant: name = %s,"

               " length = " INT32_FORMAT ","

               " PerfMaxStringConstLength = " INT32_FORMAT "\n",

               namep,

               (jint)strlen(initial_value),

               (jint)PerfMaxStringConstLength);

     }

   }

 }

 void PerfDataManager::destroy() {

   if (_all == NULL)

     // destroy already called, or initialization never happened

     return;

   for (int index = 0; index < _all->length(); index++) {

     PerfData* p = _all->at(index);

     delete p;

   }

   delete(_all);

   delete(_sampled);

   delete(_constants);

   _all = NULL;

   _sampled = NULL;

   _constants = NULL;

 }

 void PerfDataManager::add_item(PerfData* p, bool sampled) {

   MutexLocker ml(PerfDataManager_lock);

   if (_all == NULL) {

     _all = new PerfDataList(100);

   }

   assert(!_all->contains(p->name()), "duplicate name added");

   // add to the list of all perf data items

   _all->append(p);

   if (p->variability() == PerfData::V_Constant) {

     if (_constants == NULL) {

       _constants = new PerfDataList(25);

     }

     _constants->append(p);

     return;

   }

   if (sampled) {

     if (_sampled == NULL) {

       _sampled = new PerfDataList(25);

     }

     _sampled->append(p);

   }

 }

 PerfDataList* PerfDataManager::all() {

   MutexLocker ml(PerfDataManager_lock);

   if (_all == NULL)

     return NULL;

   PerfDataList* clone = _all->clone();

   return clone;

 }

 PerfDataList* PerfDataManager::sampled() {

   MutexLocker ml(PerfDataManager_lock);

   if (_sampled == NULL)

     return NULL;

   PerfDataList* clone = _sampled->clone();

   return clone;

 }

 PerfDataList* PerfDataManager::constants() {

   MutexLocker ml(PerfDataManager_lock);

   if (_constants == NULL)

     return NULL;

   PerfDataList* clone = _constants->clone();

   return clone;

 }

 char* PerfDataManager::counter_name(const char* ns, const char* name) {

    assert(ns != NULL, "ns string required");

    assert(name != NULL, "name string required");

    size_t len = strlen(ns) + strlen(name) + 2;

    char* result = NEW_RESOURCE_ARRAY(char, len);

    sprintf(result, "%s.%s", ns, name);

    return result;

 }

 char* PerfDataManager::name_space(const char* ns, const char* sub,

                                   int instance) {

    char intbuf[40];

    jio_snprintf(intbuf, 40, UINT32_FORMAT, instance);

    return name_space(ns, name_space(sub, intbuf));

 }

 char *PerfDataManager::name_space(const char* ns, int instance) {

    char intbuf[40];

    jio_snprintf(intbuf, 40, UINT32_FORMAT, instance);

    return name_space(ns, intbuf);

 }

 PerfStringConstant* PerfDataManager::create_string_constant(CounterNS ns,

                                                             const char* name,

                                                             const char* s,

                                                             TRAPS) {

   PerfStringConstant* p = new PerfStringConstant(ns, name, s);

   if (!p->is_valid()) {

     // allocation of native resources failed.

     delete p;

     THROW_0(vmSymbols::java_lang_OutOfMemoryError());

   }

   add_item(p, false);

   return p;

 }

 PerfLongConstant* PerfDataManager::create_long_constant(CounterNS ns,

                                                         const char* name,

                                                         PerfData::Units u,

                                                         jlong val, TRAPS) {

   PerfLongConstant* p = new PerfLongConstant(ns, name, u, val);

   if (!p->is_valid()) {

     // allocation of native resources failed.

     delete p;

     THROW_0(vmSymbols::java_lang_OutOfMemoryError());

   }

   add_item(p, false);

   return p;

 }

 PerfStringVariable* PerfDataManager::create_string_variable(CounterNS ns,

                                                             const char* name,

                                                             jint max_length,

                                                             const char* s,

                                                             TRAPS) {

   if (max_length == 0 && s != NULL) max_length = (jint)strlen(s);

   assert(max_length != 0, "PerfStringVariable with length 0");

   PerfStringVariable* p = new PerfStringVariable(ns, name, max_length, s);

   if (!p->is_valid()) {

     // allocation of native resources failed.

     delete p;

     THROW_0(vmSymbols::java_lang_OutOfMemoryError());

   }

   add_item(p, false);

   return p;

 }

 PerfLongVariable* PerfDataManager::create_long_variable(CounterNS ns,

                                                         const char* name,

                                                         PerfData::Units u,

                                                         jlong ival, TRAPS) {

   PerfLongVariable* p = new PerfLongVariable(ns, name, u, ival);

   if (!p->is_valid()) {

     // allocation of native resources failed.

     delete p;

     THROW_0(vmSymbols::java_lang_OutOfMemoryError());

   }

   add_item(p, false);

   return p;

 }

 PerfLongVariable* PerfDataManager::create_long_variable(CounterNS ns,

                                                         const char* name,

                                                         PerfData::Units u,

                                                         jlong* sp, TRAPS) {

   // Sampled counters not supported if UsePerfData is false

   if (!UsePerfData) return NULL;

   PerfLongVariable* p = new PerfLongVariable(ns, name, u, sp);

   if (!p->is_valid()) {

     // allocation of native resources failed.

     delete p;

     THROW_0(vmSymbols::java_lang_OutOfMemoryError());

   }

   add_item(p, true);

   return p;

 }

 PerfLongVariable* PerfDataManager::create_long_variable(CounterNS ns,

                                                         const char* name,

                                                         PerfData::Units u,

                                                         PerfSampleHelper* sh,

                                                         TRAPS) {

   // Sampled counters not supported if UsePerfData is false

   if (!UsePerfData) return NULL;

   PerfLongVariable* p = new PerfLongVariable(ns, name, u, sh);

   if (!p->is_valid()) {

     // allocation of native resources failed.

     delete p;

     THROW_0(vmSymbols::java_lang_OutOfMemoryError());

   }

   add_item(p, true);

   return p;

 }

 PerfLongCounter* PerfDataManager::create_long_counter(CounterNS ns,

                                                       const char* name,

                                                       PerfData::Units u,

                                                       jlong ival, TRAPS) {

   PerfLongCounter* p = new PerfLongCounter(ns, name, u, ival);

   if (!p->is_valid()) {

     // allocation of native resources failed.

     delete p;

     THROW_0(vmSymbols::java_lang_OutOfMemoryError());

   }

   add_item(p, false);

   return p;

 }

 PerfLongCounter* PerfDataManager::create_long_counter(CounterNS ns,

                                                       const char* name,

                                                       PerfData::Units u,

                                                       jlong* sp, TRAPS) {

   // Sampled counters not supported if UsePerfData is false

   if (!UsePerfData) return NULL;

   PerfLongCounter* p = new PerfLongCounter(ns, name, u, sp);

   if (!p->is_valid()) {

     // allocation of native resources failed.

     delete p;

     THROW_0(vmSymbols::java_lang_OutOfMemoryError());

   }

   add_item(p, true);

   return p;

 }

 PerfLongCounter* PerfDataManager::create_long_counter(CounterNS ns,

                                                       const char* name,

                                                       PerfData::Units u,

                                                       PerfSampleHelper* sh,

                                                       TRAPS) {

   // Sampled counters not supported if UsePerfData is false

   if (!UsePerfData) return NULL;

   PerfLongCounter* p = new PerfLongCounter(ns, name, u, sh);

   if (!p->is_valid()) {

     // allocation of native resources failed.

     delete p;

     THROW_0(vmSymbols::java_lang_OutOfMemoryError());

   }

   add_item(p, true);

   return p;

 }

 PerfDataList::PerfDataList(int length) {

   _set = new(ResourceObj::C_HEAP) PerfDataArray(length, true);

 }

 PerfDataList::PerfDataList(PerfDataList* p) {

   _set = new(ResourceObj::C_HEAP) PerfDataArray(p->length(), true);

   _set->appendAll(p->get_impl());

 }

 PerfDataList::~PerfDataList() {

   delete _set;

 }

 bool PerfDataList::by_name(void* name, PerfData* pd) {

   if (pd == NULL)

     return false;

   return strcmp((const char*)name, pd->name()) == 0;

 }

 PerfData* PerfDataList::find_by_name(const char* name) {

   int i = _set->find((void*)name, PerfDataList::by_name);

   if (i >= 0 && i <= _set->length())

     return _set->at(i);

   else

     return NULL;

 }

 PerfDataList* PerfDataList::clone() {

   PerfDataList* copy = new PerfDataList(this);

   assert(copy != NULL, "just checking");

   return copy;

 }