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Java example source code file (perfData.cpp)
The perfData.cpp Java example source code/* * 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 "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, mtInternal); 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, mtInternal); } if (is_on_c_heap()) { FREE_C_HEAP_ARRAY(PerfDataEntry, _pdep, mtInternal); } } 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, mtInternal); _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, JLONG_FORMAT, *(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() { // JJJ - This should not happen. Maybe the first sample is taken // while the _sample_helper is being null'ed out. // assert(_sample_helper != NULL || _sampled != NULL, "unexpected state"); if (_sample_helper == NULL) return; 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); } } PerfData* PerfDataManager::find_by_name(const char* name) { return _all->find_by_name(name); } 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, mtInternal) PerfDataArray(length, true); } PerfDataList::PerfDataList(PerfDataList* p) { _set = new(ResourceObj::C_HEAP, mtInternal) 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) { // if add_item hasn't been called the list won't be initialized if (this == NULL) return NULL; 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; } Other Java examples (source code examples)Here is a short list of links related to this Java perfData.cpp source code file: |
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