| /* |
| * Copyright (c) 2001, 2025, 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 "classfile/vmSymbols.hpp" |
| #include "jvm.h" |
| #include "logging/log.hpp" |
| #include "memory/allocation.inline.hpp" |
| #include "oops/oop.inline.hpp" |
| #include "runtime/arguments.hpp" |
| #include "runtime/handles.inline.hpp" |
| #include "runtime/java.hpp" |
| #include "runtime/javaCalls.hpp" |
| #include "runtime/mutex.hpp" |
| #include "runtime/mutexLocker.hpp" |
| #include "runtime/os.hpp" |
| #include "runtime/perfData.inline.hpp" |
| #include "utilities/exceptions.hpp" |
| #include "utilities/globalCounter.inline.hpp" |
| #include "utilities/globalDefinitions.hpp" |
| |
| PerfDataList* PerfDataManager::_all = nullptr; |
| PerfDataList* PerfDataManager::_constants = nullptr; |
| 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.threads.cpu_time", //Thread CPU time name spaces |
| "com.sun.threads.cpu_time", |
| "sun.threads.cpu_time", |
| "java.property", // Java Property name spaces |
| "com.sun.property", |
| "sun.property", |
| "", |
| }; |
| |
| PerfData::PerfData(CounterNS ns, const char* name, Units u, Variability v) |
| : _name(nullptr), _v(v), _u(u), _on_c_heap(false), _valuep(nullptr) { |
| |
| const char* prefix = PerfDataManager::ns_to_string(ns); |
| |
| const size_t _name_size = strlen(name) + strlen(prefix) + 2; |
| _name = NEW_C_HEAP_ARRAY(char, _name_size, mtInternal); |
| assert(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 { |
| os::snprintf_checked(_name, _name_size, "%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() { |
| 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 == nullptr) { |
| // 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 = %zu, vlen = %zu," |
| " pad_length = %zu, size = %zu, on_c_heap = %s," |
| " address = " INTPTR_FORMAT "," |
| " data address = " INTPTR_FORMAT, |
| 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(); |
| } |
| |
| bool PerfData::name_equals(const char* name) const { |
| return strcmp(name, this->name()) == 0; |
| } |
| |
| PerfLong::PerfLong(CounterNS ns, const char* namep, Units u, Variability v) |
| : PerfData(ns, namep, u, v) { |
| |
| create_entry(T_LONG, sizeof(jlong)); |
| } |
| |
| 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 == nullptr. |
| strncpy((char *)_valuep, s2 == nullptr ? "" : s2, _length); |
| |
| // assure the string is null terminated when strlen(s2) >= _length |
| ((char*)_valuep)[_length-1] = '\0'; |
| } |
| |
| PerfStringConstant::PerfStringConstant(CounterNS ns, const char* namep, |
| const char* initial_value) |
| : PerfString(ns, namep, V_Constant, |
| initial_value == nullptr ? 1 : |
| MIN2((jint)(strlen((char*)initial_value)+1), |
| (jint)(PerfMaxStringConstLength+1)), |
| initial_value) { |
| |
| if (PrintMiscellaneous && Verbose) { |
| if (is_valid() && initial_value != nullptr && |
| ((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 == nullptr) |
| // destroy already called, or initialization never happened |
| return; |
| |
| // About to delete the counters than might still be accessed by other threads. |
| // The shutdown is performed in two stages: a) clear the flag to notify future |
| // counter users that we are at shutdown; b) sync up with current users, waiting |
| // for them to finish with counters. |
| // |
| Atomic::store(&_has_PerfData, false); |
| GlobalCounter::write_synchronize(); |
| |
| log_debug(perf, datacreation)("Total = %d, Constants = %d", |
| _all->length(), |
| _constants == nullptr ? 0 : _constants->length()); |
| |
| for (int index = 0; index < _all->length(); index++) { |
| PerfData* p = _all->at(index); |
| delete p; |
| } |
| |
| delete(_all); |
| delete(_constants); |
| |
| _all = nullptr; |
| _constants = nullptr; |
| } |
| |
| void PerfDataManager::add_item(PerfData* p) { |
| |
| MutexLocker ml(PerfDataManager_lock); |
| |
| // Default sizes determined using -Xlog:perf+datacreation=debug |
| if (_all == nullptr) { |
| _all = new PerfDataList(191); |
| Atomic::release_store(&_has_PerfData, true); |
| } |
| |
| assert(!_all->contains(p->name()), "duplicate name added: %s", p->name()); |
| |
| // add to the list of all perf data items |
| _all->append(p); |
| |
| if (p->variability() == PerfData::V_Constant) { |
| if (_constants == nullptr) { |
| _constants = new PerfDataList(51); |
| } |
| _constants->append(p); |
| return; |
| } |
| } |
| |
| char* PerfDataManager::counter_name(const char* ns, const char* name) { |
| assert(ns != nullptr, "ns string required"); |
| assert(name != nullptr, "name string required"); |
| |
| size_t len = strlen(ns) + strlen(name) + 2; |
| char* result = NEW_RESOURCE_ARRAY(char, len); |
| os::snprintf_checked(result, len, "%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_NULL(vmSymbols::java_lang_OutOfMemoryError()); |
| } |
| |
| add_item(p); |
| |
| 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_NULL(vmSymbols::java_lang_OutOfMemoryError()); |
| } |
| |
| add_item(p); |
| |
| return p; |
| } |
| |
| PerfStringVariable* PerfDataManager::create_string_variable(CounterNS ns, |
| const char* name, |
| int max_length, |
| const char* s, |
| TRAPS) { |
| |
| if (max_length == 0 && s != nullptr) max_length = (int)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_NULL(vmSymbols::java_lang_OutOfMemoryError()); |
| } |
| |
| add_item(p); |
| |
| 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_NULL(vmSymbols::java_lang_OutOfMemoryError()); |
| } |
| |
| add_item(p); |
| |
| 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_NULL(vmSymbols::java_lang_OutOfMemoryError()); |
| } |
| |
| add_item(p); |
| |
| return p; |
| } |
| |
| /* |
| * Call into java.lang.System.getProperty to check that the value of the |
| * specified property matches |
| */ |
| void PerfDataManager::assert_system_property(const char* name, const char* value, TRAPS) { |
| #ifdef ASSERT |
| ResourceMark rm(THREAD); |
| |
| // setup the arguments to getProperty |
| Handle key_str = java_lang_String::create_from_str(name, CHECK); |
| |
| // return value |
| JavaValue result(T_OBJECT); |
| |
| // public static String getProperty(String key, String def); |
| JavaCalls::call_static(&result, vmClasses::System_klass(), |
| vmSymbols::getProperty_name(), |
| vmSymbols::string_string_signature(), key_str, CHECK); |
| |
| oop value_oop = result.get_oop(); |
| assert(value_oop != nullptr, "property must have a value"); |
| |
| // convert Java String to utf8 string |
| char *system_value = java_lang_String::as_utf8_string(value_oop); |
| |
| assert(strcmp(value, system_value) == 0, "property value mustn't differ from System.getProperty. Our value is: %s, System.getProperty is: %s", |
| value, system_value); |
| #endif // ASSERT |
| } |
| |
| /* |
| * Adds a constant counter of the given property. Asserts the value does not |
| * differ from the value retrievable from System.getProperty(name) |
| */ |
| void PerfDataManager::add_property_constant(CounterNS name_space, const char* name, const char* value, TRAPS) { |
| // the property must exist |
| assert(value != nullptr, "property name should be have a value: %s", name); |
| assert_system_property(name, value, CHECK); |
| |
| // create the property counter |
| PerfDataManager::create_string_constant(name_space, name, value, CHECK); |
| } |
| |
| /* |
| * Adds a string constant of the given property. Retrieves the value via |
| * Arguments::get_property() and asserts the value for the does not differ from |
| * the value retrievable from System.getProperty() |
| */ |
| void PerfDataManager::add_property_constant(CounterNS name_space, const char* name, TRAPS) { |
| add_property_constant(name_space, name, Arguments::get_property(name), CHECK); |
| } |
| |
| /* |
| * Adds a string constant of the given property. Retrieves the value via |
| * Arguments::get_property() and asserts the value for the does not differ from |
| * the value retrievable from System.getProperty() |
| */ |
| void PerfDataManager::add_optional_property_constant(CounterNS name_space, const char* name, TRAPS) { |
| const char* value = Arguments::get_property(name); |
| |
| if (value != nullptr) { |
| add_property_constant(name_space, name, value, CHECK); |
| } |
| } |
| |
| void PerfDataManager::create_system_property_instrumentation(TRAPS) { |
| |
| // Non-writeable, constant properties |
| add_property_constant(JAVA_PROPERTY, "java.vm.specification.name", "Java Virtual Machine Specification", CHECK); |
| add_property_constant(JAVA_PROPERTY, "java.version", JDK_Version::java_version(), CHECK); |
| add_property_constant(JAVA_PROPERTY, "java.vm.version", VM_Version::vm_release(), CHECK); |
| add_property_constant(JAVA_PROPERTY, "java.vm.name", VM_Version::vm_name(), CHECK); |
| add_property_constant(JAVA_PROPERTY, "java.vm.vendor", VM_Version::vm_vendor(), CHECK); |
| add_property_constant(JAVA_PROPERTY, "jdk.debug", VM_Version::jdk_debug_level(), CHECK); |
| |
| // Get remaining property constants via Arguments::get_property, |
| // which does a linear search over the internal system properties list. |
| |
| // SUN_PROPERTY properties |
| add_property_constant(SUN_PROPERTY, "sun.boot.library.path", CHECK); |
| |
| // JAVA_PROPERTY properties |
| add_property_constant(JAVA_PROPERTY, "java.vm.specification.version", CHECK); |
| add_property_constant(JAVA_PROPERTY, "java.vm.specification.vendor", CHECK); |
| add_property_constant(JAVA_PROPERTY, "java.vm.info", CHECK); |
| add_property_constant(JAVA_PROPERTY, "java.library.path", CHECK); |
| add_property_constant(JAVA_PROPERTY, "java.class.path", CHECK); |
| add_property_constant(JAVA_PROPERTY, "java.home", CHECK); |
| |
| add_optional_property_constant(JAVA_PROPERTY, "jdk.module.path", CHECK); |
| add_optional_property_constant(JAVA_PROPERTY, "jdk.module.upgrade.path", CHECK); |
| add_optional_property_constant(JAVA_PROPERTY, "jdk.module.main", CHECK); |
| } |
| |
| void PerfDataManager::create_misc_perfdata() { |
| |
| ResourceMark rm; |
| EXCEPTION_MARK; |
| |
| // numeric constants |
| |
| // frequency of the native high resolution timer |
| create_constant(SUN_OS, "hrt.frequency", PerfData::U_Hertz, |
| os::elapsed_frequency(), CHECK); |
| |
| // string constants |
| |
| // create string instrumentation for various Java properties. |
| create_system_property_instrumentation(CHECK); |
| |
| // HotSpot flags (from .hotspotrc) and args (from command line) |
| // |
| create_string_constant(JAVA_RT, "vmFlags", Arguments::jvm_flags(), CHECK); |
| create_string_constant(JAVA_RT, "vmArgs", Arguments::jvm_args(), CHECK); |
| |
| // java class name/jar file and arguments to main class |
| // note: name is coordinated with launcher and Arguments.cpp |
| create_string_constant(SUN_RT, "javaCommand", Arguments::java_command(), CHECK); |
| |
| // the Java VM Internal version string |
| create_string_constant(SUN_RT, "internalVersion", |
| VM_Version::internal_vm_info_string(), CHECK); |
| } |
| |
| PerfDataList::PerfDataList(int length) { |
| |
| _set = new (mtInternal) PerfDataArray(length, mtInternal); |
| } |
| |
| PerfDataList::PerfDataList(PerfDataList* p) { |
| |
| _set = new (mtInternal) PerfDataArray(p->length(), mtInternal); |
| |
| _set->appendAll(p->get_impl()); |
| } |
| |
| PerfDataList::~PerfDataList() { |
| |
| delete _set; |
| |
| } |
| |
| PerfData* PerfDataList::find_by_name(const char* name) { |
| |
| int i = _set->find_if([&](PerfData* pd) { return pd->name_equals(name); }); |
| |
| if (i >= 0 && i <= _set->length()) |
| return _set->at(i); |
| else |
| return nullptr; |
| } |
| |
| PerfDataList* PerfDataList::clone() { |
| |
| PerfDataList* copy = new PerfDataList(this); |
| |
| assert(copy != nullptr, "just checking"); |
| |
| return copy; |
| } |
| |
