--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/runtime/perfData.cpp Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,613 @@
+/*
+ * Copyright (c) 2001, 2017, 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 "logging/log.hpp"
+#include "oops/oop.inline.hpp"
+#include "prims/jvm.h"
+#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;
+volatile bool PerfDataManager::_has_PerfData = 0;
+
+/*
+ * The jvmstat global and subsystem 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);
+ }
+ 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, 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;
+
+ log_debug(perf, datacreation)("name = %s, dtype = %d, variability = %d,"
+ " units = %d, dsize = " SIZE_FORMAT ", vlen = " SIZE_FORMAT ","
+ " pad_length = " SIZE_FORMAT ", size = " SIZE_FORMAT ", 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",
+ p2i(psmp), p2i(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() {
+ if (_sample_helper != NULL) {
+ *(jlong*)_valuep = _sample_helper->take_sample();
+ }
+}
+
+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;
+
+ // Clear the flag before we free the PerfData counters. Thus begins
+ // the race between this thread and another thread that has just
+ // queried PerfDataManager::has_PerfData() and gotten back 'true'.
+ // The hope is that the other thread will finish its PerfData
+ // manipulation before we free the memory. The two alternatives are
+ // 1) leak the PerfData memory or 2) do some form of synchronized
+ // access or check before every PerfData operation.
+ _has_PerfData = false;
+ os::naked_short_sleep(1); // 1ms sleep to let other thread(s) run
+
+ 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);
+ _has_PerfData = true;
+ }
+
+ 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;
+}