| /* |
| * Copyright (c) 1997, 2014, 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/classLoader.hpp" |
| #include "classfile/classLoaderExt.hpp" |
| #include "classfile/javaAssertions.hpp" |
| #include "classfile/javaClasses.hpp" |
| #include "classfile/symbolTable.hpp" |
| #include "classfile/systemDictionary.hpp" |
| #if INCLUDE_CDS |
| #include "classfile/sharedClassUtil.hpp" |
| #include "classfile/systemDictionaryShared.hpp" |
| #endif |
| #include "classfile/vmSymbols.hpp" |
| #include "gc_interface/collectedHeap.inline.hpp" |
| #include "interpreter/bytecode.hpp" |
| #include "memory/oopFactory.hpp" |
| #include "memory/universe.inline.hpp" |
| #include "oops/fieldStreams.hpp" |
| #include "oops/instanceKlass.hpp" |
| #include "oops/objArrayKlass.hpp" |
| #include "oops/method.hpp" |
| #include "prims/jvm.h" |
| #include "prims/jvm_misc.hpp" |
| #include "prims/jvmtiExport.hpp" |
| #include "prims/jvmtiThreadState.hpp" |
| #include "prims/nativeLookup.hpp" |
| #include "prims/privilegedStack.hpp" |
| #include "runtime/arguments.hpp" |
| #include "runtime/dtraceJSDT.hpp" |
| #include "runtime/handles.inline.hpp" |
| #include "runtime/init.hpp" |
| #include "runtime/interfaceSupport.hpp" |
| #include "runtime/java.hpp" |
| #include "runtime/javaCalls.hpp" |
| #include "runtime/jfieldIDWorkaround.hpp" |
| #include "runtime/orderAccess.inline.hpp" |
| #include "runtime/os.hpp" |
| #include "runtime/perfData.hpp" |
| #include "runtime/reflection.hpp" |
| #include "runtime/vframe.hpp" |
| #include "runtime/vm_operations.hpp" |
| #include "services/attachListener.hpp" |
| #include "services/management.hpp" |
| #include "services/threadService.hpp" |
| #include "trace/tracing.hpp" |
| #include "utilities/copy.hpp" |
| #include "utilities/defaultStream.hpp" |
| #include "utilities/dtrace.hpp" |
| #include "utilities/events.hpp" |
| #include "utilities/histogram.hpp" |
| #include "utilities/top.hpp" |
| #include "utilities/utf8.hpp" |
| #ifdef TARGET_OS_FAMILY_linux |
| # include "jvm_linux.h" |
| #endif |
| #ifdef TARGET_OS_FAMILY_solaris |
| # include "jvm_solaris.h" |
| #endif |
| #ifdef TARGET_OS_FAMILY_windows |
| # include "jvm_windows.h" |
| #endif |
| #ifdef TARGET_OS_FAMILY_aix |
| # include "jvm_aix.h" |
| #endif |
| #ifdef TARGET_OS_FAMILY_bsd |
| # include "jvm_bsd.h" |
| #endif |
| |
| #include <errno.h> |
| |
| #ifndef USDT2 |
| HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long); |
| HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int); |
| HS_DTRACE_PROBE_DECL0(hotspot, thread__yield); |
| #endif /* !USDT2 */ |
| |
| /* |
| NOTE about use of any ctor or function call that can trigger a safepoint/GC: |
| such ctors and calls MUST NOT come between an oop declaration/init and its |
| usage because if objects are move this may cause various memory stomps, bus |
| errors and segfaults. Here is a cookbook for causing so called "naked oop |
| failures": |
| |
| JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> { |
| JVMWrapper("JVM_GetClassDeclaredFields"); |
| |
| // Object address to be held directly in mirror & not visible to GC |
| oop mirror = JNIHandles::resolve_non_null(ofClass); |
| |
| // If this ctor can hit a safepoint, moving objects around, then |
| ComplexConstructor foo; |
| |
| // Boom! mirror may point to JUNK instead of the intended object |
| (some dereference of mirror) |
| |
| // Here's another call that may block for GC, making mirror stale |
| MutexLocker ml(some_lock); |
| |
| // And here's an initializer that can result in a stale oop |
| // all in one step. |
| oop o = call_that_can_throw_exception(TRAPS); |
| |
| |
| The solution is to keep the oop declaration BELOW the ctor or function |
| call that might cause a GC, do another resolve to reassign the oop, or |
| consider use of a Handle instead of an oop so there is immunity from object |
| motion. But note that the "QUICK" entries below do not have a handlemark |
| and thus can only support use of handles passed in. |
| */ |
| |
| static void trace_class_resolution_impl(Klass* to_class, TRAPS) { |
| ResourceMark rm; |
| int line_number = -1; |
| const char * source_file = NULL; |
| const char * trace = "explicit"; |
| InstanceKlass* caller = NULL; |
| JavaThread* jthread = JavaThread::current(); |
| if (jthread->has_last_Java_frame()) { |
| vframeStream vfst(jthread); |
| |
| // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames |
| TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK); |
| Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK); |
| TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK); |
| Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK); |
| |
| Method* last_caller = NULL; |
| |
| while (!vfst.at_end()) { |
| Method* m = vfst.method(); |
| if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&& |
| !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) && |
| !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) { |
| break; |
| } |
| last_caller = m; |
| vfst.next(); |
| } |
| // if this is called from Class.forName0 and that is called from Class.forName, |
| // then print the caller of Class.forName. If this is Class.loadClass, then print |
| // that caller, otherwise keep quiet since this should be picked up elsewhere. |
| bool found_it = false; |
| if (!vfst.at_end() && |
| vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() && |
| vfst.method()->name() == vmSymbols::forName0_name()) { |
| vfst.next(); |
| if (!vfst.at_end() && |
| vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() && |
| vfst.method()->name() == vmSymbols::forName_name()) { |
| vfst.next(); |
| found_it = true; |
| } |
| } else if (last_caller != NULL && |
| last_caller->method_holder()->name() == |
| vmSymbols::java_lang_ClassLoader() && |
| (last_caller->name() == vmSymbols::loadClassInternal_name() || |
| last_caller->name() == vmSymbols::loadClass_name())) { |
| found_it = true; |
| } else if (!vfst.at_end()) { |
| if (vfst.method()->is_native()) { |
| // JNI call |
| found_it = true; |
| } |
| } |
| if (found_it && !vfst.at_end()) { |
| // found the caller |
| caller = vfst.method()->method_holder(); |
| line_number = vfst.method()->line_number_from_bci(vfst.bci()); |
| if (line_number == -1) { |
| // show method name if it's a native method |
| trace = vfst.method()->name_and_sig_as_C_string(); |
| } |
| Symbol* s = caller->source_file_name(); |
| if (s != NULL) { |
| source_file = s->as_C_string(); |
| } |
| } |
| } |
| if (caller != NULL) { |
| if (to_class != caller) { |
| const char * from = caller->external_name(); |
| const char * to = to_class->external_name(); |
| // print in a single call to reduce interleaving between threads |
| if (source_file != NULL) { |
| tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace); |
| } else { |
| tty->print("RESOLVE %s %s (%s)\n", from, to, trace); |
| } |
| } |
| } |
| } |
| |
| void trace_class_resolution(Klass* to_class) { |
| EXCEPTION_MARK; |
| trace_class_resolution_impl(to_class, THREAD); |
| if (HAS_PENDING_EXCEPTION) { |
| CLEAR_PENDING_EXCEPTION; |
| } |
| } |
| |
| // Wrapper to trace JVM functions |
| |
| #ifdef ASSERT |
| class JVMTraceWrapper : public StackObj { |
| public: |
| JVMTraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) { |
| if (TraceJVMCalls) { |
| va_list ap; |
| va_start(ap, format); |
| tty->print("JVM "); |
| tty->vprint_cr(format, ap); |
| va_end(ap); |
| } |
| } |
| }; |
| |
| Histogram* JVMHistogram; |
| volatile jint JVMHistogram_lock = 0; |
| |
| class JVMHistogramElement : public HistogramElement { |
| public: |
| JVMHistogramElement(const char* name); |
| }; |
| |
| JVMHistogramElement::JVMHistogramElement(const char* elementName) { |
| _name = elementName; |
| uintx count = 0; |
| |
| while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) { |
| while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) { |
| count +=1; |
| if ( (WarnOnStalledSpinLock > 0) |
| && (count % WarnOnStalledSpinLock == 0)) { |
| warning("JVMHistogram_lock seems to be stalled"); |
| } |
| } |
| } |
| |
| if(JVMHistogram == NULL) |
| JVMHistogram = new Histogram("JVM Call Counts",100); |
| |
| JVMHistogram->add_element(this); |
| Atomic::dec(&JVMHistogram_lock); |
| } |
| |
| #define JVMCountWrapper(arg) \ |
| static JVMHistogramElement* e = new JVMHistogramElement(arg); \ |
| if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen! |
| |
| #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1) |
| #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2) |
| #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3) |
| #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4) |
| #else |
| #define JVMWrapper(arg1) |
| #define JVMWrapper2(arg1, arg2) |
| #define JVMWrapper3(arg1, arg2, arg3) |
| #define JVMWrapper4(arg1, arg2, arg3, arg4) |
| #endif |
| |
| |
| // Interface version ///////////////////////////////////////////////////////////////////// |
| |
| |
| JVM_LEAF(jint, JVM_GetInterfaceVersion()) |
| return JVM_INTERFACE_VERSION; |
| JVM_END |
| |
| |
| // java.lang.System ////////////////////////////////////////////////////////////////////// |
| |
| |
| JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored)) |
| JVMWrapper("JVM_CurrentTimeMillis"); |
| return os::javaTimeMillis(); |
| JVM_END |
| |
| JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored)) |
| JVMWrapper("JVM_NanoTime"); |
| return os::javaTimeNanos(); |
| JVM_END |
| |
| |
| JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos, |
| jobject dst, jint dst_pos, jint length)) |
| JVMWrapper("JVM_ArrayCopy"); |
| // Check if we have null pointers |
| if (src == NULL || dst == NULL) { |
| THROW(vmSymbols::java_lang_NullPointerException()); |
| } |
| arrayOop s = arrayOop(JNIHandles::resolve_non_null(src)); |
| arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst)); |
| assert(s->is_oop(), "JVM_ArrayCopy: src not an oop"); |
| assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop"); |
| // Do copy |
| s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread); |
| JVM_END |
| |
| |
| static void set_property(Handle props, const char* key, const char* value, TRAPS) { |
| JavaValue r(T_OBJECT); |
| // public synchronized Object put(Object key, Object value); |
| HandleMark hm(THREAD); |
| Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK); |
| Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK); |
| JavaCalls::call_virtual(&r, |
| props, |
| KlassHandle(THREAD, SystemDictionary::Properties_klass()), |
| vmSymbols::put_name(), |
| vmSymbols::object_object_object_signature(), |
| key_str, |
| value_str, |
| THREAD); |
| } |
| |
| |
| #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties)); |
| |
| |
| JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties)) |
| JVMWrapper("JVM_InitProperties"); |
| ResourceMark rm; |
| |
| Handle props(THREAD, JNIHandles::resolve_non_null(properties)); |
| |
| // System property list includes both user set via -D option and |
| // jvm system specific properties. |
| for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { |
| PUTPROP(props, p->key(), p->value()); |
| } |
| |
| // Convert the -XX:MaxDirectMemorySize= command line flag |
| // to the sun.nio.MaxDirectMemorySize property. |
| // Do this after setting user properties to prevent people |
| // from setting the value with a -D option, as requested. |
| { |
| if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) { |
| PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1"); |
| } else { |
| char as_chars[256]; |
| jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize); |
| PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars); |
| } |
| } |
| |
| // JVM monitoring and management support |
| // Add the sun.management.compiler property for the compiler's name |
| { |
| #undef CSIZE |
| #if defined(_LP64) || defined(_WIN64) |
| #define CSIZE "64-Bit " |
| #else |
| #define CSIZE |
| #endif // 64bit |
| |
| #ifdef TIERED |
| const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers"; |
| #else |
| #if defined(COMPILER1) |
| const char* compiler_name = "HotSpot " CSIZE "Client Compiler"; |
| #elif defined(COMPILER2) |
| const char* compiler_name = "HotSpot " CSIZE "Server Compiler"; |
| #else |
| const char* compiler_name = ""; |
| #endif // compilers |
| #endif // TIERED |
| |
| if (*compiler_name != '\0' && |
| (Arguments::mode() != Arguments::_int)) { |
| PUTPROP(props, "sun.management.compiler", compiler_name); |
| } |
| } |
| |
| const char* enableSharedLookupCache = "false"; |
| #if INCLUDE_CDS |
| if (ClassLoaderExt::is_lookup_cache_enabled()) { |
| enableSharedLookupCache = "true"; |
| } |
| #endif |
| PUTPROP(props, "sun.cds.enableSharedLookupCache", enableSharedLookupCache); |
| |
| return properties; |
| JVM_END |
| |
| |
| /* |
| * Return the temporary directory that the VM uses for the attach |
| * and perf data files. |
| * |
| * It is important that this directory is well-known and the |
| * same for all VM instances. It cannot be affected by configuration |
| * variables such as java.io.tmpdir. |
| */ |
| JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env)) |
| JVMWrapper("JVM_GetTemporaryDirectory"); |
| HandleMark hm(THREAD); |
| const char* temp_dir = os::get_temp_directory(); |
| Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL); |
| return (jstring) JNIHandles::make_local(env, h()); |
| JVM_END |
| |
| |
| // java.lang.Runtime ///////////////////////////////////////////////////////////////////////// |
| |
| extern volatile jint vm_created; |
| |
| JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code)) |
| if (vm_created != 0 && (code == 0)) { |
| // The VM is about to exit. We call back into Java to check whether finalizers should be run |
| Universe::run_finalizers_on_exit(); |
| } |
| before_exit(thread); |
| vm_exit(code); |
| JVM_END |
| |
| |
| JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code)) |
| before_exit(thread); |
| vm_exit(code); |
| JVM_END |
| |
| |
| JVM_LEAF(void, JVM_OnExit(void (*func)(void))) |
| register_on_exit_function(func); |
| JVM_END |
| |
| |
| JVM_ENTRY_NO_ENV(void, JVM_GC(void)) |
| JVMWrapper("JVM_GC"); |
| if (!DisableExplicitGC) { |
| Universe::heap()->collect(GCCause::_java_lang_system_gc); |
| } |
| JVM_END |
| |
| |
| JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void)) |
| JVMWrapper("JVM_MaxObjectInspectionAge"); |
| return Universe::heap()->millis_since_last_gc(); |
| JVM_END |
| |
| |
| JVM_LEAF(void, JVM_TraceInstructions(jboolean on)) |
| if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported"); |
| JVM_END |
| |
| |
| JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on)) |
| if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported"); |
| JVM_END |
| |
| static inline jlong convert_size_t_to_jlong(size_t val) { |
| // In the 64-bit vm, a size_t can overflow a jlong (which is signed). |
| NOT_LP64 (return (jlong)val;) |
| LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);) |
| } |
| |
| JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void)) |
| JVMWrapper("JVM_TotalMemory"); |
| size_t n = Universe::heap()->capacity(); |
| return convert_size_t_to_jlong(n); |
| JVM_END |
| |
| |
| JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void)) |
| JVMWrapper("JVM_FreeMemory"); |
| CollectedHeap* ch = Universe::heap(); |
| size_t n; |
| { |
| MutexLocker x(Heap_lock); |
| n = ch->capacity() - ch->used(); |
| } |
| return convert_size_t_to_jlong(n); |
| JVM_END |
| |
| |
| JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void)) |
| JVMWrapper("JVM_MaxMemory"); |
| size_t n = Universe::heap()->max_capacity(); |
| return convert_size_t_to_jlong(n); |
| JVM_END |
| |
| |
| JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void)) |
| JVMWrapper("JVM_ActiveProcessorCount"); |
| return os::active_processor_count(); |
| JVM_END |
| |
| |
| |
| // java.lang.Throwable ////////////////////////////////////////////////////// |
| |
| |
| JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver)) |
| JVMWrapper("JVM_FillInStackTrace"); |
| Handle exception(thread, JNIHandles::resolve_non_null(receiver)); |
| java_lang_Throwable::fill_in_stack_trace(exception); |
| JVM_END |
| |
| |
| JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable)) |
| JVMWrapper("JVM_GetStackTraceDepth"); |
| oop exception = JNIHandles::resolve(throwable); |
| return java_lang_Throwable::get_stack_trace_depth(exception, THREAD); |
| JVM_END |
| |
| |
| JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index)) |
| JVMWrapper("JVM_GetStackTraceElement"); |
| JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC |
| oop exception = JNIHandles::resolve(throwable); |
| oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL); |
| return JNIHandles::make_local(env, element); |
| JVM_END |
| |
| |
| // java.lang.Object /////////////////////////////////////////////// |
| |
| |
| JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle)) |
| JVMWrapper("JVM_IHashCode"); |
| // as implemented in the classic virtual machine; return 0 if object is NULL |
| return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ; |
| JVM_END |
| |
| |
| JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms)) |
| JVMWrapper("JVM_MonitorWait"); |
| Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); |
| JavaThreadInObjectWaitState jtiows(thread, ms != 0); |
| if (JvmtiExport::should_post_monitor_wait()) { |
| JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms); |
| |
| // The current thread already owns the monitor and it has not yet |
| // been added to the wait queue so the current thread cannot be |
| // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT |
| // event handler cannot accidentally consume an unpark() meant for |
| // the ParkEvent associated with this ObjectMonitor. |
| } |
| ObjectSynchronizer::wait(obj, ms, CHECK); |
| JVM_END |
| |
| |
| JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle)) |
| JVMWrapper("JVM_MonitorNotify"); |
| Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); |
| ObjectSynchronizer::notify(obj, CHECK); |
| JVM_END |
| |
| |
| JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle)) |
| JVMWrapper("JVM_MonitorNotifyAll"); |
| Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); |
| ObjectSynchronizer::notifyall(obj, CHECK); |
| JVM_END |
| |
| |
| JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle)) |
| JVMWrapper("JVM_Clone"); |
| Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); |
| const KlassHandle klass (THREAD, obj->klass()); |
| JvmtiVMObjectAllocEventCollector oam; |
| |
| #ifdef ASSERT |
| // Just checking that the cloneable flag is set correct |
| if (obj->is_array()) { |
| guarantee(klass->is_cloneable(), "all arrays are cloneable"); |
| } else { |
| guarantee(obj->is_instance(), "should be instanceOop"); |
| bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass()); |
| guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag"); |
| } |
| #endif |
| |
| // Check if class of obj supports the Cloneable interface. |
| // All arrays are considered to be cloneable (See JLS 20.1.5) |
| if (!klass->is_cloneable()) { |
| ResourceMark rm(THREAD); |
| THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name()); |
| } |
| |
| // Make shallow object copy |
| const int size = obj->size(); |
| oop new_obj_oop = NULL; |
| if (obj->is_array()) { |
| const int length = ((arrayOop)obj())->length(); |
| new_obj_oop = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL); |
| } else { |
| new_obj_oop = CollectedHeap::obj_allocate(klass, size, CHECK_NULL); |
| } |
| |
| // 4839641 (4840070): We must do an oop-atomic copy, because if another thread |
| // is modifying a reference field in the clonee, a non-oop-atomic copy might |
| // be suspended in the middle of copying the pointer and end up with parts |
| // of two different pointers in the field. Subsequent dereferences will crash. |
| // 4846409: an oop-copy of objects with long or double fields or arrays of same |
| // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead |
| // of oops. We know objects are aligned on a minimum of an jlong boundary. |
| // The same is true of StubRoutines::object_copy and the various oop_copy |
| // variants, and of the code generated by the inline_native_clone intrinsic. |
| assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned"); |
| Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj_oop, |
| (size_t)align_object_size(size) / HeapWordsPerLong); |
| // Clear the header |
| new_obj_oop->init_mark(); |
| |
| // Store check (mark entire object and let gc sort it out) |
| BarrierSet* bs = Universe::heap()->barrier_set(); |
| assert(bs->has_write_region_opt(), "Barrier set does not have write_region"); |
| bs->write_region(MemRegion((HeapWord*)new_obj_oop, size)); |
| |
| Handle new_obj(THREAD, new_obj_oop); |
| // Special handling for MemberNames. Since they contain Method* metadata, they |
| // must be registered so that RedefineClasses can fix metadata contained in them. |
| if (java_lang_invoke_MemberName::is_instance(new_obj()) && |
| java_lang_invoke_MemberName::is_method(new_obj())) { |
| Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(new_obj()); |
| // MemberName may be unresolved, so doesn't need registration until resolved. |
| if (method != NULL) { |
| methodHandle m(THREAD, method); |
| // This can safepoint and redefine method, so need both new_obj and method |
| // in a handle, for two different reasons. new_obj can move, method can be |
| // deleted if nothing is using it on the stack. |
| m->method_holder()->add_member_name(new_obj()); |
| } |
| } |
| |
| // Caution: this involves a java upcall, so the clone should be |
| // "gc-robust" by this stage. |
| if (klass->has_finalizer()) { |
| assert(obj->is_instance(), "should be instanceOop"); |
| new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL); |
| new_obj = Handle(THREAD, new_obj_oop); |
| } |
| |
| return JNIHandles::make_local(env, new_obj()); |
| JVM_END |
| |
| // java.lang.Compiler //////////////////////////////////////////////////// |
| |
| // The initial cuts of the HotSpot VM will not support JITs, and all existing |
| // JITs would need extensive changes to work with HotSpot. The JIT-related JVM |
| // functions are all silently ignored unless JVM warnings are printed. |
| |
| JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls)) |
| if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported"); |
| JVM_END |
| |
| |
| JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls)) |
| if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported"); |
| return JNI_FALSE; |
| JVM_END |
| |
| |
| JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls)) |
| if (PrintJVMWarnings) warning("JVM_CompileClass not supported"); |
| return JNI_FALSE; |
| JVM_END |
| |
| |
| JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname)) |
| if (PrintJVMWarnings) warning("JVM_CompileClasses not supported"); |
| return JNI_FALSE; |
| JVM_END |
| |
| |
| JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg)) |
| if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported"); |
| return NULL; |
| JVM_END |
| |
| |
| JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls)) |
| if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported"); |
| JVM_END |
| |
| |
| JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls)) |
| if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported"); |
| JVM_END |
| |
| |
| |
| // Error message support ////////////////////////////////////////////////////// |
| |
| JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len)) |
| JVMWrapper("JVM_GetLastErrorString"); |
| return (jint)os::lasterror(buf, len); |
| JVM_END |
| |
| |
| // java.io.File /////////////////////////////////////////////////////////////// |
| |
| JVM_LEAF(char*, JVM_NativePath(char* path)) |
| JVMWrapper2("JVM_NativePath (%s)", path); |
| return os::native_path(path); |
| JVM_END |
| |
| |
| // Misc. class handling /////////////////////////////////////////////////////////// |
| |
| |
| JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth)) |
| JVMWrapper("JVM_GetCallerClass"); |
| |
| // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or |
| // sun.reflect.Reflection.getCallerClass with a depth parameter is provided |
| // temporarily for existing code to use until a replacement API is defined. |
| if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) { |
| Klass* k = thread->security_get_caller_class(depth); |
| return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror()); |
| } |
| |
| // Getting the class of the caller frame. |
| // |
| // The call stack at this point looks something like this: |
| // |
| // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ] |
| // [1] [ @CallerSensitive API.method ] |
| // [.] [ (skipped intermediate frames) ] |
| // [n] [ caller ] |
| vframeStream vfst(thread); |
| // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass |
| for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) { |
| Method* m = vfst.method(); |
| assert(m != NULL, "sanity"); |
| switch (n) { |
| case 0: |
| // This must only be called from Reflection.getCallerClass |
| if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) { |
| THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass"); |
| } |
| // fall-through |
| case 1: |
| // Frame 0 and 1 must be caller sensitive. |
| if (!m->caller_sensitive()) { |
| THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n)); |
| } |
| break; |
| default: |
| if (!m->is_ignored_by_security_stack_walk()) { |
| // We have reached the desired frame; return the holder class. |
| return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror()); |
| } |
| break; |
| } |
| } |
| return NULL; |
| JVM_END |
| |
| |
| JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf)) |
| JVMWrapper("JVM_FindPrimitiveClass"); |
| oop mirror = NULL; |
| BasicType t = name2type(utf); |
| if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) { |
| mirror = Universe::java_mirror(t); |
| } |
| if (mirror == NULL) { |
| THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf); |
| } else { |
| return (jclass) JNIHandles::make_local(env, mirror); |
| } |
| JVM_END |
| |
| |
| JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls)) |
| JVMWrapper("JVM_ResolveClass"); |
| if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented"); |
| JVM_END |
| |
| |
| JVM_ENTRY(jboolean, JVM_KnownToNotExist(JNIEnv *env, jobject loader, const char *classname)) |
| JVMWrapper("JVM_KnownToNotExist"); |
| #if INCLUDE_CDS |
| return ClassLoaderExt::known_to_not_exist(env, loader, classname, CHECK_(false)); |
| #else |
| return false; |
| #endif |
| JVM_END |
| |
| |
| JVM_ENTRY(jobjectArray, JVM_GetResourceLookupCacheURLs(JNIEnv *env, jobject loader)) |
| JVMWrapper("JVM_GetResourceLookupCacheURLs"); |
| #if INCLUDE_CDS |
| return ClassLoaderExt::get_lookup_cache_urls(env, loader, CHECK_NULL); |
| #else |
| return NULL; |
| #endif |
| JVM_END |
| |
| |
| JVM_ENTRY(jintArray, JVM_GetResourceLookupCache(JNIEnv *env, jobject loader, const char *resource_name)) |
| JVMWrapper("JVM_GetResourceLookupCache"); |
| #if INCLUDE_CDS |
| return ClassLoaderExt::get_lookup_cache(env, loader, resource_name, CHECK_NULL); |
| #else |
| return NULL; |
| #endif |
| JVM_END |
| |
| |
| // Returns a class loaded by the bootstrap class loader; or null |
| // if not found. ClassNotFoundException is not thrown. |
| // |
| // Rationale behind JVM_FindClassFromBootLoader |
| // a> JVM_FindClassFromClassLoader was never exported in the export tables. |
| // b> because of (a) java.dll has a direct dependecy on the unexported |
| // private symbol "_JVM_FindClassFromClassLoader@20". |
| // c> the launcher cannot use the private symbol as it dynamically opens |
| // the entry point, so if something changes, the launcher will fail |
| // unexpectedly at runtime, it is safest for the launcher to dlopen a |
| // stable exported interface. |
| // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its |
| // signature to change from _JVM_FindClassFromClassLoader@20 to |
| // JVM_FindClassFromClassLoader and will not be backward compatible |
| // with older JDKs. |
| // Thus a public/stable exported entry point is the right solution, |
| // public here means public in linker semantics, and is exported only |
| // to the JDK, and is not intended to be a public API. |
| |
| JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env, |
| const char* name)) |
| JVMWrapper2("JVM_FindClassFromBootLoader %s", name); |
| |
| // Java libraries should ensure that name is never null... |
| if (name == NULL || (int)strlen(name) > Symbol::max_length()) { |
| // It's impossible to create this class; the name cannot fit |
| // into the constant pool. |
| return NULL; |
| } |
| |
| TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); |
| Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL); |
| if (k == NULL) { |
| return NULL; |
| } |
| |
| if (TraceClassResolution) { |
| trace_class_resolution(k); |
| } |
| return (jclass) JNIHandles::make_local(env, k->java_mirror()); |
| JVM_END |
| |
| // Not used; JVM_FindClassFromCaller replaces this. |
| JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name, |
| jboolean init, jobject loader, |
| jboolean throwError)) |
| JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name, |
| throwError ? "error" : "exception"); |
| // Java libraries should ensure that name is never null... |
| if (name == NULL || (int)strlen(name) > Symbol::max_length()) { |
| // It's impossible to create this class; the name cannot fit |
| // into the constant pool. |
| if (throwError) { |
| THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); |
| } else { |
| THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name); |
| } |
| } |
| TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); |
| Handle h_loader(THREAD, JNIHandles::resolve(loader)); |
| jclass result = find_class_from_class_loader(env, h_name, init, h_loader, |
| Handle(), throwError, THREAD); |
| |
| if (TraceClassResolution && result != NULL) { |
| trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); |
| } |
| return result; |
| JVM_END |
| |
| // Find a class with this name in this loader, using the caller's protection domain. |
| JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name, |
| jboolean init, jobject loader, |
| jclass caller)) |
| JVMWrapper2("JVM_FindClassFromCaller %s throws ClassNotFoundException", name); |
| // Java libraries should ensure that name is never null... |
| if (name == NULL || (int)strlen(name) > Symbol::max_length()) { |
| // It's impossible to create this class; the name cannot fit |
| // into the constant pool. |
| THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name); |
| } |
| |
| TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); |
| |
| oop loader_oop = JNIHandles::resolve(loader); |
| oop from_class = JNIHandles::resolve(caller); |
| oop protection_domain = NULL; |
| // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get |
| // NPE. Put it in another way, the bootstrap class loader has all permission and |
| // thus no checkPackageAccess equivalence in the VM class loader. |
| // The caller is also passed as NULL by the java code if there is no security |
| // manager to avoid the performance cost of getting the calling class. |
| if (from_class != NULL && loader_oop != NULL) { |
| protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain(); |
| } |
| |
| Handle h_loader(THREAD, loader_oop); |
| Handle h_prot(THREAD, protection_domain); |
| jclass result = find_class_from_class_loader(env, h_name, init, h_loader, |
| h_prot, false, THREAD); |
| |
| if (TraceClassResolution && result != NULL) { |
| trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); |
| } |
| return result; |
| JVM_END |
| |
| JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name, |
| jboolean init, jclass from)) |
| JVMWrapper2("JVM_FindClassFromClass %s", name); |
| if (name == NULL || (int)strlen(name) > Symbol::max_length()) { |
| // It's impossible to create this class; the name cannot fit |
| // into the constant pool. |
| THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); |
| } |
| TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); |
| oop from_class_oop = JNIHandles::resolve(from); |
| Klass* from_class = (from_class_oop == NULL) |
| ? (Klass*)NULL |
| : java_lang_Class::as_Klass(from_class_oop); |
| oop class_loader = NULL; |
| oop protection_domain = NULL; |
| if (from_class != NULL) { |
| class_loader = from_class->class_loader(); |
| protection_domain = from_class->protection_domain(); |
| } |
| Handle h_loader(THREAD, class_loader); |
| Handle h_prot (THREAD, protection_domain); |
| jclass result = find_class_from_class_loader(env, h_name, init, h_loader, |
| h_prot, true, thread); |
| |
| if (TraceClassResolution && result != NULL) { |
| // this function is generally only used for class loading during verification. |
| ResourceMark rm; |
| oop from_mirror = JNIHandles::resolve_non_null(from); |
| Klass* from_class = java_lang_Class::as_Klass(from_mirror); |
| const char * from_name = from_class->external_name(); |
| |
| oop mirror = JNIHandles::resolve_non_null(result); |
| Klass* to_class = java_lang_Class::as_Klass(mirror); |
| const char * to = to_class->external_name(); |
| tty->print("RESOLVE %s %s (verification)\n", from_name, to); |
| } |
| |
| return result; |
| JVM_END |
| |
| static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) { |
| if (loader.is_null()) { |
| return; |
| } |
| |
| // check whether the current caller thread holds the lock or not. |
| // If not, increment the corresponding counter |
| if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) != |
| ObjectSynchronizer::owner_self) { |
| counter->inc(); |
| } |
| } |
| |
| // common code for JVM_DefineClass() and JVM_DefineClassWithSource() |
| // and JVM_DefineClassWithSourceCond() |
| static jclass jvm_define_class_common(JNIEnv *env, const char *name, |
| jobject loader, const jbyte *buf, |
| jsize len, jobject pd, const char *source, |
| jboolean verify, TRAPS) { |
| if (source == NULL) source = "__JVM_DefineClass__"; |
| |
| assert(THREAD->is_Java_thread(), "must be a JavaThread"); |
| JavaThread* jt = (JavaThread*) THREAD; |
| |
| PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(), |
| ClassLoader::perf_define_appclass_selftime(), |
| ClassLoader::perf_define_appclasses(), |
| jt->get_thread_stat()->perf_recursion_counts_addr(), |
| jt->get_thread_stat()->perf_timers_addr(), |
| PerfClassTraceTime::DEFINE_CLASS); |
| |
| if (UsePerfData) { |
| ClassLoader::perf_app_classfile_bytes_read()->inc(len); |
| } |
| |
| // Since exceptions can be thrown, class initialization can take place |
| // if name is NULL no check for class name in .class stream has to be made. |
| TempNewSymbol class_name = NULL; |
| if (name != NULL) { |
| const int str_len = (int)strlen(name); |
| if (str_len > Symbol::max_length()) { |
| // It's impossible to create this class; the name cannot fit |
| // into the constant pool. |
| THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); |
| } |
| class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL); |
| } |
| |
| ResourceMark rm(THREAD); |
| ClassFileStream st((u1*) buf, len, (char *)source); |
| Handle class_loader (THREAD, JNIHandles::resolve(loader)); |
| if (UsePerfData) { |
| is_lock_held_by_thread(class_loader, |
| ClassLoader::sync_JVMDefineClassLockFreeCounter(), |
| THREAD); |
| } |
| Handle protection_domain (THREAD, JNIHandles::resolve(pd)); |
| Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader, |
| protection_domain, &st, |
| verify != 0, |
| CHECK_NULL); |
| |
| if (TraceClassResolution && k != NULL) { |
| trace_class_resolution(k); |
| } |
| |
| return (jclass) JNIHandles::make_local(env, k->java_mirror()); |
| } |
| |
| |
| JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd)) |
| JVMWrapper2("JVM_DefineClass %s", name); |
| |
| return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD); |
| JVM_END |
| |
| |
| JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source)) |
| JVMWrapper2("JVM_DefineClassWithSource %s", name); |
| |
| return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD); |
| JVM_END |
| |
| JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name, |
| jobject loader, const jbyte *buf, |
| jsize len, jobject pd, |
| const char *source, jboolean verify)) |
| JVMWrapper2("JVM_DefineClassWithSourceCond %s", name); |
| |
| return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD); |
| JVM_END |
| |
| JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name)) |
| JVMWrapper("JVM_FindLoadedClass"); |
| ResourceMark rm(THREAD); |
| |
| Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); |
| Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL); |
| |
| const char* str = java_lang_String::as_utf8_string(string()); |
| // Sanity check, don't expect null |
| if (str == NULL) return NULL; |
| |
| const int str_len = (int)strlen(str); |
| if (str_len > Symbol::max_length()) { |
| // It's impossible to create this class; the name cannot fit |
| // into the constant pool. |
| return NULL; |
| } |
| TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL); |
| |
| // Security Note: |
| // The Java level wrapper will perform the necessary security check allowing |
| // us to pass the NULL as the initiating class loader. |
| Handle h_loader(THREAD, JNIHandles::resolve(loader)); |
| if (UsePerfData) { |
| is_lock_held_by_thread(h_loader, |
| ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(), |
| THREAD); |
| } |
| |
| Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name, |
| h_loader, |
| Handle(), |
| CHECK_NULL); |
| #if INCLUDE_CDS |
| if (k == NULL) { |
| // If the class is not already loaded, try to see if it's in the shared |
| // archive for the current classloader (h_loader). |
| instanceKlassHandle ik = SystemDictionaryShared::find_or_load_shared_class( |
| klass_name, h_loader, CHECK_NULL); |
| k = ik(); |
| } |
| #endif |
| return (k == NULL) ? NULL : |
| (jclass) JNIHandles::make_local(env, k->java_mirror()); |
| JVM_END |
| |
| |
| // Reflection support ////////////////////////////////////////////////////////////////////////////// |
| |
| JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls)) |
| assert (cls != NULL, "illegal class"); |
| JVMWrapper("JVM_GetClassName"); |
| JvmtiVMObjectAllocEventCollector oam; |
| ResourceMark rm(THREAD); |
| const char* name; |
| if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { |
| name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls))); |
| } else { |
| // Consider caching interned string in Klass |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); |
| assert(k->is_klass(), "just checking"); |
| name = k->external_name(); |
| } |
| oop result = StringTable::intern((char*) name, CHECK_NULL); |
| return (jstring) JNIHandles::make_local(env, result); |
| JVM_END |
| |
| |
| JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls)) |
| JVMWrapper("JVM_GetClassInterfaces"); |
| JvmtiVMObjectAllocEventCollector oam; |
| oop mirror = JNIHandles::resolve_non_null(cls); |
| |
| // Special handling for primitive objects |
| if (java_lang_Class::is_primitive(mirror)) { |
| // Primitive objects does not have any interfaces |
| objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); |
| return (jobjectArray) JNIHandles::make_local(env, r); |
| } |
| |
| KlassHandle klass(thread, java_lang_Class::as_Klass(mirror)); |
| // Figure size of result array |
| int size; |
| if (klass->oop_is_instance()) { |
| size = InstanceKlass::cast(klass())->local_interfaces()->length(); |
| } else { |
| assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass"); |
| size = 2; |
| } |
| |
| // Allocate result array |
| objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL); |
| objArrayHandle result (THREAD, r); |
| // Fill in result |
| if (klass->oop_is_instance()) { |
| // Regular instance klass, fill in all local interfaces |
| for (int index = 0; index < size; index++) { |
| Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index); |
| result->obj_at_put(index, k->java_mirror()); |
| } |
| } else { |
| // All arrays implement java.lang.Cloneable and java.io.Serializable |
| result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror()); |
| result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror()); |
| } |
| return (jobjectArray) JNIHandles::make_local(env, result()); |
| JVM_END |
| |
| |
| JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls)) |
| JVMWrapper("JVM_GetClassLoader"); |
| if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { |
| return NULL; |
| } |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| oop loader = k->class_loader(); |
| return JNIHandles::make_local(env, loader); |
| JVM_END |
| |
| |
| JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls)) |
| JVMWrapper("JVM_IsInterface"); |
| oop mirror = JNIHandles::resolve_non_null(cls); |
| if (java_lang_Class::is_primitive(mirror)) { |
| return JNI_FALSE; |
| } |
| Klass* k = java_lang_Class::as_Klass(mirror); |
| jboolean result = k->is_interface(); |
| assert(!result || k->oop_is_instance(), |
| "all interfaces are instance types"); |
| // The compiler intrinsic for isInterface tests the |
| // Klass::_access_flags bits in the same way. |
| return result; |
| JVM_END |
| |
| |
| JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls)) |
| JVMWrapper("JVM_GetClassSigners"); |
| JvmtiVMObjectAllocEventCollector oam; |
| if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { |
| // There are no signers for primitive types |
| return NULL; |
| } |
| |
| objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls)); |
| |
| // If there are no signers set in the class, or if the class |
| // is an array, return NULL. |
| if (signers == NULL) return NULL; |
| |
| // copy of the signers array |
| Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass(); |
| objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL); |
| for (int index = 0; index < signers->length(); index++) { |
| signers_copy->obj_at_put(index, signers->obj_at(index)); |
| } |
| |
| // return the copy |
| return (jobjectArray) JNIHandles::make_local(env, signers_copy); |
| JVM_END |
| |
| |
| JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers)) |
| JVMWrapper("JVM_SetClassSigners"); |
| if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { |
| // This call is ignored for primitive types and arrays. |
| // Signers are only set once, ClassLoader.java, and thus shouldn't |
| // be called with an array. Only the bootstrap loader creates arrays. |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| if (k->oop_is_instance()) { |
| java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers))); |
| } |
| } |
| JVM_END |
| |
| |
| JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls)) |
| JVMWrapper("JVM_GetProtectionDomain"); |
| if (JNIHandles::resolve(cls) == NULL) { |
| THROW_(vmSymbols::java_lang_NullPointerException(), NULL); |
| } |
| |
| if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { |
| // Primitive types does not have a protection domain. |
| return NULL; |
| } |
| |
| oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls)); |
| return (jobject) JNIHandles::make_local(env, pd); |
| JVM_END |
| |
| |
| static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) { |
| // If there is a security manager and protection domain, check the access |
| // in the protection domain, otherwise it is authorized. |
| if (java_lang_System::has_security_manager()) { |
| |
| // For bootstrapping, if pd implies method isn't in the JDK, allow |
| // this context to revert to older behavior. |
| // In this case the isAuthorized field in AccessControlContext is also not |
| // present. |
| if (Universe::protection_domain_implies_method() == NULL) { |
| return true; |
| } |
| |
| // Whitelist certain access control contexts |
| if (java_security_AccessControlContext::is_authorized(context)) { |
| return true; |
| } |
| |
| oop prot = klass->protection_domain(); |
| if (prot != NULL) { |
| // Call pd.implies(new SecurityPermission("createAccessControlContext")) |
| // in the new wrapper. |
| methodHandle m(THREAD, Universe::protection_domain_implies_method()); |
| Handle h_prot(THREAD, prot); |
| JavaValue result(T_BOOLEAN); |
| JavaCallArguments args(h_prot); |
| JavaCalls::call(&result, m, &args, CHECK_false); |
| return (result.get_jboolean() != 0); |
| } |
| } |
| return true; |
| } |
| |
| // Create an AccessControlContext with a protection domain with null codesource |
| // and null permissions - which gives no permissions. |
| oop create_dummy_access_control_context(TRAPS) { |
| InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass()); |
| // new ProtectionDomain(null,null); |
| oop null_protection_domain = pd_klass->allocate_instance(CHECK_NULL); |
| Handle null_pd(THREAD, null_protection_domain); |
| |
| // new ProtectionDomain[] {pd}; |
| objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL); |
| context->obj_at_put(0, null_pd()); |
| |
| // new AccessControlContext(new ProtectionDomain[] {pd}) |
| objArrayHandle h_context(THREAD, context); |
| oop result = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL); |
| return result; |
| } |
| |
| JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException)) |
| JVMWrapper("JVM_DoPrivileged"); |
| |
| if (action == NULL) { |
| THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action"); |
| } |
| |
| // Compute the frame initiating the do privileged operation and setup the privileged stack |
| vframeStream vfst(thread); |
| vfst.security_get_caller_frame(1); |
| |
| if (vfst.at_end()) { |
| THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?"); |
| } |
| |
| Method* method = vfst.method(); |
| instanceKlassHandle klass (THREAD, method->method_holder()); |
| |
| // Check that action object understands "Object run()" |
| Handle h_context; |
| if (context != NULL) { |
| h_context = Handle(THREAD, JNIHandles::resolve(context)); |
| bool authorized = is_authorized(h_context, klass, CHECK_NULL); |
| if (!authorized) { |
| // Create an unprivileged access control object and call it's run function |
| // instead. |
| oop noprivs = create_dummy_access_control_context(CHECK_NULL); |
| h_context = Handle(THREAD, noprivs); |
| } |
| } |
| |
| // Check that action object understands "Object run()" |
| Handle object (THREAD, JNIHandles::resolve(action)); |
| |
| // get run() method |
| Method* m_oop = object->klass()->uncached_lookup_method( |
| vmSymbols::run_method_name(), |
| vmSymbols::void_object_signature(), |
| Klass::normal); |
| methodHandle m (THREAD, m_oop); |
| if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) { |
| THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method"); |
| } |
| |
| // Stack allocated list of privileged stack elements |
| PrivilegedElement pi; |
| if (!vfst.at_end()) { |
| pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL); |
| thread->set_privileged_stack_top(&pi); |
| } |
| |
| |
| // invoke the Object run() in the action object. We cannot use call_interface here, since the static type |
| // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction |
| Handle pending_exception; |
| JavaValue result(T_OBJECT); |
| JavaCallArguments args(object); |
| JavaCalls::call(&result, m, &args, THREAD); |
| |
| // done with action, remove ourselves from the list |
| if (!vfst.at_end()) { |
| assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element"); |
| thread->set_privileged_stack_top(thread->privileged_stack_top()->next()); |
| } |
| |
| if (HAS_PENDING_EXCEPTION) { |
| pending_exception = Handle(THREAD, PENDING_EXCEPTION); |
| CLEAR_PENDING_EXCEPTION; |
| // JVMTI has already reported the pending exception |
| // JVMTI internal flag reset is needed in order to report PrivilegedActionException |
| if (THREAD->is_Java_thread()) { |
| JvmtiExport::clear_detected_exception((JavaThread*) THREAD); |
| } |
| if ( pending_exception->is_a(SystemDictionary::Exception_klass()) && |
| !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) { |
| // Throw a java.security.PrivilegedActionException(Exception e) exception |
| JavaCallArguments args(pending_exception); |
| THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(), |
| vmSymbols::exception_void_signature(), |
| &args); |
| } |
| } |
| |
| if (pending_exception.not_null()) THROW_OOP_0(pending_exception()); |
| return JNIHandles::make_local(env, (oop) result.get_jobject()); |
| JVM_END |
| |
| |
| // Returns the inherited_access_control_context field of the running thread. |
| JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls)) |
| JVMWrapper("JVM_GetInheritedAccessControlContext"); |
| oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj()); |
| return JNIHandles::make_local(env, result); |
| JVM_END |
| |
| class RegisterArrayForGC { |
| private: |
| JavaThread *_thread; |
| public: |
| RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) { |
| _thread = thread; |
| _thread->register_array_for_gc(array); |
| } |
| |
| ~RegisterArrayForGC() { |
| _thread->register_array_for_gc(NULL); |
| } |
| }; |
| |
| |
| JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls)) |
| JVMWrapper("JVM_GetStackAccessControlContext"); |
| if (!UsePrivilegedStack) return NULL; |
| |
| ResourceMark rm(THREAD); |
| GrowableArray<oop>* local_array = new GrowableArray<oop>(12); |
| JvmtiVMObjectAllocEventCollector oam; |
| |
| // count the protection domains on the execution stack. We collapse |
| // duplicate consecutive protection domains into a single one, as |
| // well as stopping when we hit a privileged frame. |
| |
| // Use vframeStream to iterate through Java frames |
| vframeStream vfst(thread); |
| |
| oop previous_protection_domain = NULL; |
| Handle privileged_context(thread, NULL); |
| bool is_privileged = false; |
| oop protection_domain = NULL; |
| |
| for(; !vfst.at_end(); vfst.next()) { |
| // get method of frame |
| Method* method = vfst.method(); |
| intptr_t* frame_id = vfst.frame_id(); |
| |
| // check the privileged frames to see if we have a match |
| if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) { |
| // this frame is privileged |
| is_privileged = true; |
| privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context()); |
| protection_domain = thread->privileged_stack_top()->protection_domain(); |
| } else { |
| protection_domain = method->method_holder()->protection_domain(); |
| } |
| |
| if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) { |
| local_array->push(protection_domain); |
| previous_protection_domain = protection_domain; |
| } |
| |
| if (is_privileged) break; |
| } |
| |
| |
| // either all the domains on the stack were system domains, or |
| // we had a privileged system domain |
| if (local_array->is_empty()) { |
| if (is_privileged && privileged_context.is_null()) return NULL; |
| |
| oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL); |
| return JNIHandles::make_local(env, result); |
| } |
| |
| // the resource area must be registered in case of a gc |
| RegisterArrayForGC ragc(thread, local_array); |
| objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(), |
| local_array->length(), CHECK_NULL); |
| objArrayHandle h_context(thread, context); |
| for (int index = 0; index < local_array->length(); index++) { |
| h_context->obj_at_put(index, local_array->at(index)); |
| } |
| |
| oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL); |
| |
| return JNIHandles::make_local(env, result); |
| JVM_END |
| |
| |
| JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls)) |
| JVMWrapper("JVM_IsArrayClass"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| return (k != NULL) && k->oop_is_array() ? true : false; |
| JVM_END |
| |
| |
| JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls)) |
| JVMWrapper("JVM_IsPrimitiveClass"); |
| oop mirror = JNIHandles::resolve_non_null(cls); |
| return (jboolean) java_lang_Class::is_primitive(mirror); |
| JVM_END |
| |
| |
| JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls)) |
| JVMWrapper("JVM_GetComponentType"); |
| oop mirror = JNIHandles::resolve_non_null(cls); |
| oop result = Reflection::array_component_type(mirror, CHECK_NULL); |
| return (jclass) JNIHandles::make_local(env, result); |
| JVM_END |
| |
| |
| JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls)) |
| JVMWrapper("JVM_GetClassModifiers"); |
| if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { |
| // Primitive type |
| return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; |
| } |
| |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0)); |
| assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK"); |
| return k->modifier_flags(); |
| JVM_END |
| |
| |
| // Inner class reflection /////////////////////////////////////////////////////////////////////////////// |
| |
| JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass)) |
| JvmtiVMObjectAllocEventCollector oam; |
| // ofClass is a reference to a java_lang_Class object. The mirror object |
| // of an InstanceKlass |
| |
| if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || |
| ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) { |
| oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); |
| return (jobjectArray)JNIHandles::make_local(env, result); |
| } |
| |
| instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); |
| InnerClassesIterator iter(k); |
| |
| if (iter.length() == 0) { |
| // Neither an inner nor outer class |
| oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); |
| return (jobjectArray)JNIHandles::make_local(env, result); |
| } |
| |
| // find inner class info |
| constantPoolHandle cp(thread, k->constants()); |
| int length = iter.length(); |
| |
| // Allocate temp. result array |
| objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL); |
| objArrayHandle result (THREAD, r); |
| int members = 0; |
| |
| for (; !iter.done(); iter.next()) { |
| int ioff = iter.inner_class_info_index(); |
| int ooff = iter.outer_class_info_index(); |
| |
| if (ioff != 0 && ooff != 0) { |
| // Check to see if the name matches the class we're looking for |
| // before attempting to find the class. |
| if (cp->klass_name_at_matches(k, ooff)) { |
| Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL); |
| if (outer_klass == k()) { |
| Klass* ik = cp->klass_at(ioff, CHECK_NULL); |
| instanceKlassHandle inner_klass (THREAD, ik); |
| |
| // Throws an exception if outer klass has not declared k as |
| // an inner klass |
| Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL); |
| |
| result->obj_at_put(members, inner_klass->java_mirror()); |
| members++; |
| } |
| } |
| } |
| } |
| |
| if (members != length) { |
| // Return array of right length |
| objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL); |
| for(int i = 0; i < members; i++) { |
| res->obj_at_put(i, result->obj_at(i)); |
| } |
| return (jobjectArray)JNIHandles::make_local(env, res); |
| } |
| |
| return (jobjectArray)JNIHandles::make_local(env, result()); |
| JVM_END |
| |
| |
| JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass)) |
| { |
| // ofClass is a reference to a java_lang_Class object. |
| if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || |
| ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) { |
| return NULL; |
| } |
| |
| bool inner_is_member = false; |
| Klass* outer_klass |
| = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)) |
| )->compute_enclosing_class(&inner_is_member, CHECK_NULL); |
| if (outer_klass == NULL) return NULL; // already a top-level class |
| if (!inner_is_member) return NULL; // an anonymous class (inside a method) |
| return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror()); |
| } |
| JVM_END |
| |
| // should be in InstanceKlass.cpp, but is here for historical reasons |
| Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k, |
| bool* inner_is_member, |
| TRAPS) { |
| Thread* thread = THREAD; |
| InnerClassesIterator iter(k); |
| if (iter.length() == 0) { |
| // No inner class info => no declaring class |
| return NULL; |
| } |
| |
| constantPoolHandle i_cp(thread, k->constants()); |
| |
| bool found = false; |
| Klass* ok; |
| instanceKlassHandle outer_klass; |
| *inner_is_member = false; |
| |
| // Find inner_klass attribute |
| for (; !iter.done() && !found; iter.next()) { |
| int ioff = iter.inner_class_info_index(); |
| int ooff = iter.outer_class_info_index(); |
| int noff = iter.inner_name_index(); |
| if (ioff != 0) { |
| // Check to see if the name matches the class we're looking for |
| // before attempting to find the class. |
| if (i_cp->klass_name_at_matches(k, ioff)) { |
| Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL); |
| found = (k() == inner_klass); |
| if (found && ooff != 0) { |
| ok = i_cp->klass_at(ooff, CHECK_NULL); |
| outer_klass = instanceKlassHandle(thread, ok); |
| *inner_is_member = true; |
| } |
| } |
| } |
| } |
| |
| if (found && outer_klass.is_null()) { |
| // It may be anonymous; try for that. |
| int encl_method_class_idx = k->enclosing_method_class_index(); |
| if (encl_method_class_idx != 0) { |
| ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL); |
| outer_klass = instanceKlassHandle(thread, ok); |
| *inner_is_member = false; |
| } |
| } |
| |
| // If no inner class attribute found for this class. |
| if (outer_klass.is_null()) return NULL; |
| |
| // Throws an exception if outer klass has not declared k as an inner klass |
| // We need evidence that each klass knows about the other, or else |
| // the system could allow a spoof of an inner class to gain access rights. |
| Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL); |
| return outer_klass(); |
| } |
| |
| JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls)) |
| assert (cls != NULL, "illegal class"); |
| JVMWrapper("JVM_GetClassSignature"); |
| JvmtiVMObjectAllocEventCollector oam; |
| ResourceMark rm(THREAD); |
| // Return null for arrays and primatives |
| if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); |
| if (k->oop_is_instance()) { |
| Symbol* sym = InstanceKlass::cast(k)->generic_signature(); |
| if (sym == NULL) return NULL; |
| Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); |
| return (jstring) JNIHandles::make_local(env, str()); |
| } |
| } |
| return NULL; |
| JVM_END |
| |
| |
| JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls)) |
| assert (cls != NULL, "illegal class"); |
| JVMWrapper("JVM_GetClassAnnotations"); |
| |
| // Return null for arrays and primitives |
| if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); |
| if (k->oop_is_instance()) { |
| typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL); |
| return (jbyteArray) JNIHandles::make_local(env, a); |
| } |
| } |
| return NULL; |
| JVM_END |
| |
| |
| static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) { |
| // some of this code was adapted from from jni_FromReflectedField |
| |
| oop reflected = JNIHandles::resolve_non_null(field); |
| oop mirror = java_lang_reflect_Field::clazz(reflected); |
| Klass* k = java_lang_Class::as_Klass(mirror); |
| int slot = java_lang_reflect_Field::slot(reflected); |
| int modifiers = java_lang_reflect_Field::modifiers(reflected); |
| |
| KlassHandle kh(THREAD, k); |
| intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot); |
| |
| if (modifiers & JVM_ACC_STATIC) { |
| // for static fields we only look in the current class |
| if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) { |
| assert(false, "cannot find static field"); |
| return false; |
| } |
| } else { |
| // for instance fields we start with the current class and work |
| // our way up through the superclass chain |
| if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) { |
| assert(false, "cannot find instance field"); |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field)) |
| // field is a handle to a java.lang.reflect.Field object |
| assert(field != NULL, "illegal field"); |
| JVMWrapper("JVM_GetFieldAnnotations"); |
| |
| fieldDescriptor fd; |
| bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL); |
| if (!gotFd) { |
| return NULL; |
| } |
| |
| return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD)); |
| JVM_END |
| |
| |
| static Method* jvm_get_method_common(jobject method) { |
| // some of this code was adapted from from jni_FromReflectedMethod |
| |
| oop reflected = JNIHandles::resolve_non_null(method); |
| oop mirror = NULL; |
| int slot = 0; |
| |
| if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { |
| mirror = java_lang_reflect_Constructor::clazz(reflected); |
| slot = java_lang_reflect_Constructor::slot(reflected); |
| } else { |
| assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), |
| "wrong type"); |
| mirror = java_lang_reflect_Method::clazz(reflected); |
| slot = java_lang_reflect_Method::slot(reflected); |
| } |
| Klass* k = java_lang_Class::as_Klass(mirror); |
| |
| Method* m = InstanceKlass::cast(k)->method_with_idnum(slot); |
| assert(m != NULL, "cannot find method"); |
| return m; // caller has to deal with NULL in product mode |
| } |
| |
| |
| JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method)) |
| JVMWrapper("JVM_GetMethodAnnotations"); |
| |
| // method is a handle to a java.lang.reflect.Method object |
| Method* m = jvm_get_method_common(method); |
| if (m == NULL) { |
| return NULL; |
| } |
| |
| return (jbyteArray) JNIHandles::make_local(env, |
| Annotations::make_java_array(m->annotations(), THREAD)); |
| JVM_END |
| |
| |
| JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method)) |
| JVMWrapper("JVM_GetMethodDefaultAnnotationValue"); |
| |
| // method is a handle to a java.lang.reflect.Method object |
| Method* m = jvm_get_method_common(method); |
| if (m == NULL) { |
| return NULL; |
| } |
| |
| return (jbyteArray) JNIHandles::make_local(env, |
| Annotations::make_java_array(m->annotation_default(), THREAD)); |
| JVM_END |
| |
| |
| JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method)) |
| JVMWrapper("JVM_GetMethodParameterAnnotations"); |
| |
| // method is a handle to a java.lang.reflect.Method object |
| Method* m = jvm_get_method_common(method); |
| if (m == NULL) { |
| return NULL; |
| } |
| |
| return (jbyteArray) JNIHandles::make_local(env, |
| Annotations::make_java_array(m->parameter_annotations(), THREAD)); |
| JVM_END |
| |
| /* Type use annotations support (JDK 1.8) */ |
| |
| JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls)) |
| assert (cls != NULL, "illegal class"); |
| JVMWrapper("JVM_GetClassTypeAnnotations"); |
| ResourceMark rm(THREAD); |
| // Return null for arrays and primitives |
| if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); |
| if (k->oop_is_instance()) { |
| AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations(); |
| if (type_annotations != NULL) { |
| typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL); |
| return (jbyteArray) JNIHandles::make_local(env, a); |
| } |
| } |
| } |
| return NULL; |
| JVM_END |
| |
| JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method)) |
| assert (method != NULL, "illegal method"); |
| JVMWrapper("JVM_GetMethodTypeAnnotations"); |
| |
| // method is a handle to a java.lang.reflect.Method object |
| Method* m = jvm_get_method_common(method); |
| if (m == NULL) { |
| return NULL; |
| } |
| |
| AnnotationArray* type_annotations = m->type_annotations(); |
| if (type_annotations != NULL) { |
| typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL); |
| return (jbyteArray) JNIHandles::make_local(env, a); |
| } |
| |
| return NULL; |
| JVM_END |
| |
| JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field)) |
| assert (field != NULL, "illegal field"); |
| JVMWrapper("JVM_GetFieldTypeAnnotations"); |
| |
| fieldDescriptor fd; |
| bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL); |
| if (!gotFd) { |
| return NULL; |
| } |
| |
| return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD)); |
| JVM_END |
| |
| static void bounds_check(constantPoolHandle cp, jint index, TRAPS) { |
| if (!cp->is_within_bounds(index)) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); |
| } |
| } |
| |
| JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method)) |
| { |
| JVMWrapper("JVM_GetMethodParameters"); |
| // method is a handle to a java.lang.reflect.Method object |
| Method* method_ptr = jvm_get_method_common(method); |
| methodHandle mh (THREAD, method_ptr); |
| Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method)); |
| const int num_params = mh->method_parameters_length(); |
| |
| if (0 != num_params) { |
| // make sure all the symbols are properly formatted |
| for (int i = 0; i < num_params; i++) { |
| MethodParametersElement* params = mh->method_parameters_start(); |
| int index = params[i].name_cp_index; |
| bounds_check(mh->constants(), index, CHECK_NULL); |
| |
| if (0 != index && !mh->constants()->tag_at(index).is_utf8()) { |
| THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), |
| "Wrong type at constant pool index"); |
| } |
| |
| } |
| |
| objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL); |
| objArrayHandle result (THREAD, result_oop); |
| |
| for (int i = 0; i < num_params; i++) { |
| MethodParametersElement* params = mh->method_parameters_start(); |
| // For a 0 index, give a NULL symbol |
| Symbol* sym = 0 != params[i].name_cp_index ? |
| mh->constants()->symbol_at(params[i].name_cp_index) : NULL; |
| int flags = params[i].flags; |
| oop param = Reflection::new_parameter(reflected_method, i, sym, |
| flags, CHECK_NULL); |
| result->obj_at_put(i, param); |
| } |
| return (jobjectArray)JNIHandles::make_local(env, result()); |
| } else { |
| return (jobjectArray)NULL; |
| } |
| } |
| JVM_END |
| |
| // New (JDK 1.4) reflection implementation ///////////////////////////////////// |
| |
| JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly)) |
| { |
| JVMWrapper("JVM_GetClassDeclaredFields"); |
| JvmtiVMObjectAllocEventCollector oam; |
| |
| // Exclude primitive types and array types |
| if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || |
| java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { |
| // Return empty array |
| oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL); |
| return (jobjectArray) JNIHandles::make_local(env, res); |
| } |
| |
| instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); |
| constantPoolHandle cp(THREAD, k->constants()); |
| |
| // Ensure class is linked |
| k->link_class(CHECK_NULL); |
| |
| // 4496456 We need to filter out java.lang.Throwable.backtrace |
| bool skip_backtrace = false; |
| |
| // Allocate result |
| int num_fields; |
| |
| if (publicOnly) { |
| num_fields = 0; |
| for (JavaFieldStream fs(k()); !fs.done(); fs.next()) { |
| if (fs.access_flags().is_public()) ++num_fields; |
| } |
| } else { |
| num_fields = k->java_fields_count(); |
| |
| if (k() == SystemDictionary::Throwable_klass()) { |
| num_fields--; |
| skip_backtrace = true; |
| } |
| } |
| |
| objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL); |
| objArrayHandle result (THREAD, r); |
| |
| int out_idx = 0; |
| fieldDescriptor fd; |
| for (JavaFieldStream fs(k); !fs.done(); fs.next()) { |
| if (skip_backtrace) { |
| // 4496456 skip java.lang.Throwable.backtrace |
| int offset = fs.offset(); |
| if (offset == java_lang_Throwable::get_backtrace_offset()) continue; |
| } |
| |
| if (!publicOnly || fs.access_flags().is_public()) { |
| fd.reinitialize(k(), fs.index()); |
| oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); |
| result->obj_at_put(out_idx, field); |
| ++out_idx; |
| } |
| } |
| assert(out_idx == num_fields, "just checking"); |
| return (jobjectArray) JNIHandles::make_local(env, result()); |
| } |
| JVM_END |
| |
| static bool select_method(methodHandle method, bool want_constructor) { |
| if (want_constructor) { |
| return (method->is_initializer() && !method->is_static()); |
| } else { |
| return (!method->is_initializer() && !method->is_overpass()); |
| } |
| } |
| |
| static jobjectArray get_class_declared_methods_helper( |
| JNIEnv *env, |
| jclass ofClass, jboolean publicOnly, |
| bool want_constructor, |
| Klass* klass, TRAPS) { |
| |
| JvmtiVMObjectAllocEventCollector oam; |
| |
| // Exclude primitive types and array types |
| if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) |
| || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { |
| // Return empty array |
| oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL); |
| return (jobjectArray) JNIHandles::make_local(env, res); |
| } |
| |
| instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); |
| |
| // Ensure class is linked |
| k->link_class(CHECK_NULL); |
| |
| Array<Method*>* methods = k->methods(); |
| int methods_length = methods->length(); |
| |
| // Save original method_idnum in case of redefinition, which can change |
| // the idnum of obsolete methods. The new method will have the same idnum |
| // but if we refresh the methods array, the counts will be wrong. |
| ResourceMark rm(THREAD); |
| GrowableArray<int>* idnums = new GrowableArray<int>(methods_length); |
| int num_methods = 0; |
| |
| for (int i = 0; i < methods_length; i++) { |
| methodHandle method(THREAD, methods->at(i)); |
| if (select_method(method, want_constructor)) { |
| if (!publicOnly || method->is_public()) { |
| idnums->push(method->method_idnum()); |
| ++num_methods; |
| } |
| } |
| } |
| |
| // Allocate result |
| objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL); |
| objArrayHandle result (THREAD, r); |
| |
| // Now just put the methods that we selected above, but go by their idnum |
| // in case of redefinition. The methods can be redefined at any safepoint, |
| // so above when allocating the oop array and below when creating reflect |
| // objects. |
| for (int i = 0; i < num_methods; i++) { |
| methodHandle method(THREAD, k->method_with_idnum(idnums->at(i))); |
| if (method.is_null()) { |
| // Method may have been deleted and seems this API can handle null |
| // Otherwise should probably put a method that throws NSME |
| result->obj_at_put(i, NULL); |
| } else { |
| oop m; |
| if (want_constructor) { |
| m = Reflection::new_constructor(method, CHECK_NULL); |
| } else { |
| m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL); |
| } |
| result->obj_at_put(i, m); |
| } |
| } |
| |
| return (jobjectArray) JNIHandles::make_local(env, result()); |
| } |
| |
| JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) |
| { |
| JVMWrapper("JVM_GetClassDeclaredMethods"); |
| return get_class_declared_methods_helper(env, ofClass, publicOnly, |
| /*want_constructor*/ false, |
| SystemDictionary::reflect_Method_klass(), THREAD); |
| } |
| JVM_END |
| |
| JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly)) |
| { |
| JVMWrapper("JVM_GetClassDeclaredConstructors"); |
| return get_class_declared_methods_helper(env, ofClass, publicOnly, |
| /*want_constructor*/ true, |
| SystemDictionary::reflect_Constructor_klass(), THREAD); |
| } |
| JVM_END |
| |
| JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls)) |
| { |
| JVMWrapper("JVM_GetClassAccessFlags"); |
| if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { |
| // Primitive type |
| return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; |
| } |
| |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS; |
| } |
| JVM_END |
| |
| |
| // Constant pool access ////////////////////////////////////////////////////////// |
| |
| JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls)) |
| { |
| JVMWrapper("JVM_GetClassConstantPool"); |
| JvmtiVMObjectAllocEventCollector oam; |
| |
| // Return null for primitives and arrays |
| if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| if (k->oop_is_instance()) { |
| instanceKlassHandle k_h(THREAD, k); |
| Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL); |
| sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants()); |
| return JNIHandles::make_local(jcp()); |
| } |
| } |
| return NULL; |
| } |
| JVM_END |
| |
| |
| JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused)) |
| { |
| JVMWrapper("JVM_ConstantPoolGetSize"); |
| constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
| return cp->length(); |
| } |
| JVM_END |
| |
| |
| JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index)) |
| { |
| JVMWrapper("JVM_ConstantPoolGetClassAt"); |
| constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
| bounds_check(cp, index, CHECK_NULL); |
| constantTag tag = cp->tag_at(index); |
| if (!tag.is_klass() && !tag.is_unresolved_klass()) { |
| THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); |
| } |
| Klass* k = cp->klass_at(index, CHECK_NULL); |
| return (jclass) JNIHandles::make_local(k->java_mirror()); |
| } |
| JVM_END |
| |
| JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) |
| { |
| JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded"); |
| constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
| bounds_check(cp, index, CHECK_NULL); |
| constantTag tag = cp->tag_at(index); |
| if (!tag.is_klass() && !tag.is_unresolved_klass()) { |
| THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); |
| } |
| Klass* k = ConstantPool::klass_at_if_loaded(cp, index); |
| if (k == NULL) return NULL; |
| return (jclass) JNIHandles::make_local(k->java_mirror()); |
| } |
| JVM_END |
| |
| static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { |
| constantTag tag = cp->tag_at(index); |
| if (!tag.is_method() && !tag.is_interface_method()) { |
| THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); |
| } |
| int klass_ref = cp->uncached_klass_ref_index_at(index); |
| Klass* k_o; |
| if (force_resolution) { |
| k_o = cp->klass_at(klass_ref, CHECK_NULL); |
| } else { |
| k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); |
| if (k_o == NULL) return NULL; |
| } |
| instanceKlassHandle k(THREAD, k_o); |
| Symbol* name = cp->uncached_name_ref_at(index); |
| Symbol* sig = cp->uncached_signature_ref_at(index); |
| methodHandle m (THREAD, k->find_method(name, sig)); |
| if (m.is_null()) { |
| THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class"); |
| } |
| oop method; |
| if (!m->is_initializer() || m->is_static()) { |
| method = Reflection::new_method(m, true, true, CHECK_NULL); |
| } else { |
| method = Reflection::new_constructor(m, CHECK_NULL); |
| } |
| return JNIHandles::make_local(method); |
| } |
| |
| JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index)) |
| { |
| JVMWrapper("JVM_ConstantPoolGetMethodAt"); |
| JvmtiVMObjectAllocEventCollector oam; |
| constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
| bounds_check(cp, index, CHECK_NULL); |
| jobject res = get_method_at_helper(cp, index, true, CHECK_NULL); |
| return res; |
| } |
| JVM_END |
| |
| JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) |
| { |
| JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded"); |
| JvmtiVMObjectAllocEventCollector oam; |
| constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
| bounds_check(cp, index, CHECK_NULL); |
| jobject res = get_method_at_helper(cp, index, false, CHECK_NULL); |
| return res; |
| } |
| JVM_END |
| |
| static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { |
| constantTag tag = cp->tag_at(index); |
| if (!tag.is_field()) { |
| THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); |
| } |
| int klass_ref = cp->uncached_klass_ref_index_at(index); |
| Klass* k_o; |
| if (force_resolution) { |
| k_o = cp->klass_at(klass_ref, CHECK_NULL); |
| } else { |
| k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); |
| if (k_o == NULL) return NULL; |
| } |
| instanceKlassHandle k(THREAD, k_o); |
| Symbol* name = cp->uncached_name_ref_at(index); |
| Symbol* sig = cp->uncached_signature_ref_at(index); |
| fieldDescriptor fd; |
| Klass* target_klass = k->find_field(name, sig, &fd); |
| if (target_klass == NULL) { |
| THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class"); |
| } |
| oop field = Reflection::new_field(&fd, true, CHECK_NULL); |
| return JNIHandles::make_local(field); |
| } |
| |
| JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index)) |
| { |
| JVMWrapper("JVM_ConstantPoolGetFieldAt"); |
| JvmtiVMObjectAllocEventCollector oam; |
| constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
| bounds_check(cp, index, CHECK_NULL); |
| jobject res = get_field_at_helper(cp, index, true, CHECK_NULL); |
| return res; |
| } |
| JVM_END |
| |
| JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) |
| { |
| JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded"); |
| JvmtiVMObjectAllocEventCollector oam; |
| constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
| bounds_check(cp, index, CHECK_NULL); |
| jobject res = get_field_at_helper(cp, index, false, CHECK_NULL); |
| return res; |
| } |
| JVM_END |
| |
| JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index)) |
| { |
| JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt"); |
| JvmtiVMObjectAllocEventCollector oam; |
| constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
| bounds_check(cp, index, CHECK_NULL); |
| constantTag tag = cp->tag_at(index); |
| if (!tag.is_field_or_method()) { |
| THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); |
| } |
| int klass_ref = cp->uncached_klass_ref_index_at(index); |
| Symbol* klass_name = cp->klass_name_at(klass_ref); |
| Symbol* member_name = cp->uncached_name_ref_at(index); |
| Symbol* member_sig = cp->uncached_signature_ref_at(index); |
| objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL); |
| objArrayHandle dest(THREAD, dest_o); |
| Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL); |
| dest->obj_at_put(0, str()); |
| str = java_lang_String::create_from_symbol(member_name, CHECK_NULL); |
| dest->obj_at_put(1, str()); |
| str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL); |
| dest->obj_at_put(2, str()); |
| return (jobjectArray) JNIHandles::make_local(dest()); |
| } |
| JVM_END |
| |
| JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index)) |
| { |
| JVMWrapper("JVM_ConstantPoolGetIntAt"); |
| constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
| bounds_check(cp, index, CHECK_0); |
| constantTag tag = cp->tag_at(index); |
| if (!tag.is_int()) { |
| THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); |
| } |
| return cp->int_at(index); |
| } |
| JVM_END |
| |
| JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index)) |
| { |
| JVMWrapper("JVM_ConstantPoolGetLongAt"); |
| constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
| bounds_check(cp, index, CHECK_(0L)); |
| constantTag tag = cp->tag_at(index); |
| if (!tag.is_long()) { |
| THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); |
| } |
| return cp->long_at(index); |
| } |
| JVM_END |
| |
| JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index)) |
| { |
| JVMWrapper("JVM_ConstantPoolGetFloatAt"); |
| constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
| bounds_check(cp, index, CHECK_(0.0f)); |
| constantTag tag = cp->tag_at(index); |
| if (!tag.is_float()) { |
| THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); |
| } |
| return cp->float_at(index); |
| } |
| JVM_END |
| |
| JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index)) |
| { |
| JVMWrapper("JVM_ConstantPoolGetDoubleAt"); |
| constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
| bounds_check(cp, index, CHECK_(0.0)); |
| constantTag tag = cp->tag_at(index); |
| if (!tag.is_double()) { |
| THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); |
| } |
| return cp->double_at(index); |
| } |
| JVM_END |
| |
| JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index)) |
| { |
| JVMWrapper("JVM_ConstantPoolGetStringAt"); |
| constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
| bounds_check(cp, index, CHECK_NULL); |
| constantTag tag = cp->tag_at(index); |
| if (!tag.is_string()) { |
| THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); |
| } |
| oop str = cp->string_at(index, CHECK_NULL); |
| return (jstring) JNIHandles::make_local(str); |
| } |
| JVM_END |
| |
| JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index)) |
| { |
| JVMWrapper("JVM_ConstantPoolGetUTF8At"); |
| JvmtiVMObjectAllocEventCollector oam; |
| constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); |
| bounds_check(cp, index, CHECK_NULL); |
| constantTag tag = cp->tag_at(index); |
| if (!tag.is_symbol()) { |
| THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); |
| } |
| Symbol* sym = cp->symbol_at(index); |
| Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); |
| return (jstring) JNIHandles::make_local(str()); |
| } |
| JVM_END |
| |
| |
| // Assertion support. ////////////////////////////////////////////////////////// |
| |
| JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls)) |
| JVMWrapper("JVM_DesiredAssertionStatus"); |
| assert(cls != NULL, "bad class"); |
| |
| oop r = JNIHandles::resolve(cls); |
| assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed"); |
| if (java_lang_Class::is_primitive(r)) return false; |
| |
| Klass* k = java_lang_Class::as_Klass(r); |
| assert(k->oop_is_instance(), "must be an instance klass"); |
| if (! k->oop_is_instance()) return false; |
| |
| ResourceMark rm(THREAD); |
| const char* name = k->name()->as_C_string(); |
| bool system_class = k->class_loader() == NULL; |
| return JavaAssertions::enabled(name, system_class); |
| |
| JVM_END |
| |
| |
| // Return a new AssertionStatusDirectives object with the fields filled in with |
| // command-line assertion arguments (i.e., -ea, -da). |
| JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused)) |
| JVMWrapper("JVM_AssertionStatusDirectives"); |
| JvmtiVMObjectAllocEventCollector oam; |
| oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL); |
| return JNIHandles::make_local(env, asd); |
| JVM_END |
| |
| // Verification //////////////////////////////////////////////////////////////////////////////// |
| |
| // Reflection for the verifier ///////////////////////////////////////////////////////////////// |
| |
| // RedefineClasses support: bug 6214132 caused verification to fail. |
| // All functions from this section should call the jvmtiThreadSate function: |
| // Klass* class_to_verify_considering_redefinition(Klass* klass). |
| // The function returns a Klass* of the _scratch_class if the verifier |
| // was invoked in the middle of the class redefinition. |
| // Otherwise it returns its argument value which is the _the_class Klass*. |
| // Please, refer to the description in the jvmtiThreadSate.hpp. |
| |
| JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls)) |
| JVMWrapper("JVM_GetClassNameUTF"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| return k->name()->as_utf8(); |
| JVM_END |
| |
| |
| JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types)) |
| JVMWrapper("JVM_GetClassCPTypes"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| // types will have length zero if this is not an InstanceKlass |
| // (length is determined by call to JVM_GetClassCPEntriesCount) |
| if (k->oop_is_instance()) { |
| ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
| for (int index = cp->length() - 1; index >= 0; index--) { |
| constantTag tag = cp->tag_at(index); |
| types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value(); |
| } |
| } |
| JVM_END |
| |
| |
| JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls)) |
| JVMWrapper("JVM_GetClassCPEntriesCount"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| if (!k->oop_is_instance()) |
| return 0; |
| return InstanceKlass::cast(k)->constants()->length(); |
| JVM_END |
| |
| |
| JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls)) |
| JVMWrapper("JVM_GetClassFieldsCount"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| if (!k->oop_is_instance()) |
| return 0; |
| return InstanceKlass::cast(k)->java_fields_count(); |
| JVM_END |
| |
| |
| JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls)) |
| JVMWrapper("JVM_GetClassMethodsCount"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| if (!k->oop_is_instance()) |
| return 0; |
| return InstanceKlass::cast(k)->methods()->length(); |
| JVM_END |
| |
| |
| // The following methods, used for the verifier, are never called with |
| // array klasses, so a direct cast to InstanceKlass is safe. |
| // Typically, these methods are called in a loop with bounds determined |
| // by the results of JVM_GetClass{Fields,Methods}Count, which return |
| // zero for arrays. |
| JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions)) |
| JVMWrapper("JVM_GetMethodIxExceptionIndexes"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
| int length = method->checked_exceptions_length(); |
| if (length > 0) { |
| CheckedExceptionElement* table= method->checked_exceptions_start(); |
| for (int i = 0; i < length; i++) { |
| exceptions[i] = table[i].class_cp_index; |
| } |
| } |
| JVM_END |
| |
| |
| JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index)) |
| JVMWrapper("JVM_GetMethodIxExceptionsCount"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
| return method->checked_exceptions_length(); |
| JVM_END |
| |
| |
| JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code)) |
| JVMWrapper("JVM_GetMethodIxByteCode"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
| memcpy(code, method->code_base(), method->code_size()); |
| JVM_END |
| |
| |
| JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index)) |
| JVMWrapper("JVM_GetMethodIxByteCodeLength"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
| return method->code_size(); |
| JVM_END |
| |
| |
| JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry)) |
| JVMWrapper("JVM_GetMethodIxExceptionTableEntry"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
| ExceptionTable extable(method); |
| entry->start_pc = extable.start_pc(entry_index); |
| entry->end_pc = extable.end_pc(entry_index); |
| entry->handler_pc = extable.handler_pc(entry_index); |
| entry->catchType = extable.catch_type_index(entry_index); |
| JVM_END |
| |
| |
| JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index)) |
| JVMWrapper("JVM_GetMethodIxExceptionTableLength"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
| return method->exception_table_length(); |
| JVM_END |
| |
| |
| JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index)) |
| JVMWrapper("JVM_GetMethodIxModifiers"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
| return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; |
| JVM_END |
| |
| |
| JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index)) |
| JVMWrapper("JVM_GetFieldIxModifiers"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS; |
| JVM_END |
| |
| |
| JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index)) |
| JVMWrapper("JVM_GetMethodIxLocalsCount"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
| return method->max_locals(); |
| JVM_END |
| |
| |
| JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index)) |
| JVMWrapper("JVM_GetMethodIxArgsSize"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
| return method->size_of_parameters(); |
| JVM_END |
| |
| |
| JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index)) |
| JVMWrapper("JVM_GetMethodIxMaxStack"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
| return method->verifier_max_stack(); |
| JVM_END |
| |
| |
| JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index)) |
| JVMWrapper("JVM_IsConstructorIx"); |
| ResourceMark rm(THREAD); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
| return method->name() == vmSymbols::object_initializer_name(); |
| JVM_END |
| |
| |
| JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index)) |
| JVMWrapper("JVM_IsVMGeneratedMethodIx"); |
| ResourceMark rm(THREAD); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
| return method->is_overpass(); |
| JVM_END |
| |
| JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index)) |
| JVMWrapper("JVM_GetMethodIxIxUTF"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
| return method->name()->as_utf8(); |
| JVM_END |
| |
| |
| JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index)) |
| JVMWrapper("JVM_GetMethodIxSignatureUTF"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| Method* method = InstanceKlass::cast(k)->methods()->at(method_index); |
| return method->signature()->as_utf8(); |
| JVM_END |
| |
| /** |
| * All of these JVM_GetCP-xxx methods are used by the old verifier to |
| * read entries in the constant pool. Since the old verifier always |
| * works on a copy of the code, it will not see any rewriting that |
| * may possibly occur in the middle of verification. So it is important |
| * that nothing it calls tries to use the cpCache instead of the raw |
| * constant pool, so we must use cp->uncached_x methods when appropriate. |
| */ |
| JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index)) |
| JVMWrapper("JVM_GetCPFieldNameUTF"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
| switch (cp->tag_at(cp_index).value()) { |
| case JVM_CONSTANT_Fieldref: |
| return cp->uncached_name_ref_at(cp_index)->as_utf8(); |
| default: |
| fatal("JVM_GetCPFieldNameUTF: illegal constant"); |
| } |
| ShouldNotReachHere(); |
| return NULL; |
| JVM_END |
| |
| |
| JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index)) |
| JVMWrapper("JVM_GetCPMethodNameUTF"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
| switch (cp->tag_at(cp_index).value()) { |
| case JVM_CONSTANT_InterfaceMethodref: |
| case JVM_CONSTANT_Methodref: |
| case JVM_CONSTANT_NameAndType: // for invokedynamic |
| return cp->uncached_name_ref_at(cp_index)->as_utf8(); |
| default: |
| fatal("JVM_GetCPMethodNameUTF: illegal constant"); |
| } |
| ShouldNotReachHere(); |
| return NULL; |
| JVM_END |
| |
| |
| JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) |
| JVMWrapper("JVM_GetCPMethodSignatureUTF"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
| switch (cp->tag_at(cp_index).value()) { |
| case JVM_CONSTANT_InterfaceMethodref: |
| case JVM_CONSTANT_Methodref: |
| case JVM_CONSTANT_NameAndType: // for invokedynamic |
| return cp->uncached_signature_ref_at(cp_index)->as_utf8(); |
| default: |
| fatal("JVM_GetCPMethodSignatureUTF: illegal constant"); |
| } |
| ShouldNotReachHere(); |
| return NULL; |
| JVM_END |
| |
| |
| JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) |
| JVMWrapper("JVM_GetCPFieldSignatureUTF"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
| switch (cp->tag_at(cp_index).value()) { |
| case JVM_CONSTANT_Fieldref: |
| return cp->uncached_signature_ref_at(cp_index)->as_utf8(); |
| default: |
| fatal("JVM_GetCPFieldSignatureUTF: illegal constant"); |
| } |
| ShouldNotReachHere(); |
| return NULL; |
| JVM_END |
| |
| |
| JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) |
| JVMWrapper("JVM_GetCPClassNameUTF"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
| Symbol* classname = cp->klass_name_at(cp_index); |
| return classname->as_utf8(); |
| JVM_END |
| |
| |
| JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) |
| JVMWrapper("JVM_GetCPFieldClassNameUTF"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
| switch (cp->tag_at(cp_index).value()) { |
| case JVM_CONSTANT_Fieldref: { |
| int class_index = cp->uncached_klass_ref_index_at(cp_index); |
| Symbol* classname = cp->klass_name_at(class_index); |
| return classname->as_utf8(); |
| } |
| default: |
| fatal("JVM_GetCPFieldClassNameUTF: illegal constant"); |
| } |
| ShouldNotReachHere(); |
| return NULL; |
| JVM_END |
| |
| |
| JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) |
| JVMWrapper("JVM_GetCPMethodClassNameUTF"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
| switch (cp->tag_at(cp_index).value()) { |
| case JVM_CONSTANT_Methodref: |
| case JVM_CONSTANT_InterfaceMethodref: { |
| int class_index = cp->uncached_klass_ref_index_at(cp_index); |
| Symbol* classname = cp->klass_name_at(class_index); |
| return classname->as_utf8(); |
| } |
| default: |
| fatal("JVM_GetCPMethodClassNameUTF: illegal constant"); |
| } |
| ShouldNotReachHere(); |
| return NULL; |
| JVM_END |
| |
| |
| JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) |
| JVMWrapper("JVM_GetCPFieldModifiers"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); |
| ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
| ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants(); |
| switch (cp->tag_at(cp_index).value()) { |
| case JVM_CONSTANT_Fieldref: { |
| Symbol* name = cp->uncached_name_ref_at(cp_index); |
| Symbol* signature = cp->uncached_signature_ref_at(cp_index); |
| for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) { |
| if (fs.name() == name && fs.signature() == signature) { |
| return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS; |
| } |
| } |
| return -1; |
| } |
| default: |
| fatal("JVM_GetCPFieldModifiers: illegal constant"); |
| } |
| ShouldNotReachHere(); |
| return 0; |
| JVM_END |
| |
| |
| JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) |
| JVMWrapper("JVM_GetCPMethodModifiers"); |
| Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
| Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); |
| k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); |
| k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); |
| ConstantPool* cp = InstanceKlass::cast(k)->constants(); |
| switch (cp->tag_at(cp_index).value()) { |
| case JVM_CONSTANT_Methodref: |
| case JVM_CONSTANT_InterfaceMethodref: { |
| Symbol* name = cp->uncached_name_ref_at(cp_index); |
| Symbol* signature = cp->uncached_signature_ref_at(cp_index); |
| Array<Method*>* methods = InstanceKlass::cast(k_called)->methods(); |
| int methods_count = methods->length(); |
| for (int i = 0; i < methods_count; i++) { |
| Method* method = methods->at(i); |
| if (method->name() == name && method->signature() == signature) { |
| return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; |
| } |
| } |
| return -1; |
| } |
| default: |
| fatal("JVM_GetCPMethodModifiers: illegal constant"); |
| } |
| ShouldNotReachHere(); |
| return 0; |
| JVM_END |
| |
| |
| // Misc ////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| JVM_LEAF(void, JVM_ReleaseUTF(const char *utf)) |
| // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything |
| JVM_END |
| |
| |
| JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2)) |
| JVMWrapper("JVM_IsSameClassPackage"); |
| oop class1_mirror = JNIHandles::resolve_non_null(class1); |
| oop class2_mirror = JNIHandles::resolve_non_null(class2); |
| Klass* klass1 = java_lang_Class::as_Klass(class1_mirror); |
| Klass* klass2 = java_lang_Class::as_Klass(class2_mirror); |
| return (jboolean) Reflection::is_same_class_package(klass1, klass2); |
| JVM_END |
| |
| |
| // IO functions //////////////////////////////////////////////////////////////////////////////////////// |
| |
| JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode)) |
| JVMWrapper2("JVM_Open (%s)", fname); |
| |
| //%note jvm_r6 |
| int result = os::open(fname, flags, mode); |
| if (result >= 0) { |
| return result; |
| } else { |
| switch(errno) { |
| case EEXIST: |
| return JVM_EEXIST; |
| default: |
| return -1; |
| } |
| } |
| JVM_END |
| |
| |
| JVM_LEAF(jint, JVM_Close(jint fd)) |
| JVMWrapper2("JVM_Close (0x%x)", fd); |
| //%note jvm_r6 |
| return os::close(fd); |
| JVM_END |
| |
| |
| JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes)) |
| JVMWrapper2("JVM_Read (0x%x)", fd); |
| |
| //%note jvm_r6 |
| return (jint)os::restartable_read(fd, buf, nbytes); |
| JVM_END |
| |
| |
| JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes)) |
| JVMWrapper2("JVM_Write (0x%x)", fd); |
| |
| //%note jvm_r6 |
| return (jint)os::write(fd, buf, nbytes); |
| JVM_END |
| |
| |
| JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes)) |
| JVMWrapper2("JVM_Available (0x%x)", fd); |
| //%note jvm_r6 |
| return os::available(fd, pbytes); |
| JVM_END |
| |
| |
| JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence)) |
| JVMWrapper4("JVM_Lseek (0x%x, " INT64_FORMAT ", %d)", fd, (int64_t) offset, whence); |
| //%note jvm_r6 |
| return os::lseek(fd, offset, whence); |
| JVM_END |
| |
| |
| JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length)) |
| JVMWrapper3("JVM_SetLength (0x%x, " INT64_FORMAT ")", fd, (int64_t) length); |
| return os::ftruncate(fd, length); |
| JVM_END |
| |
| |
| JVM_LEAF(jint, JVM_Sync(jint fd)) |
| JVMWrapper2("JVM_Sync (0x%x)", fd); |
| //%note jvm_r6 |
| return os::fsync(fd); |
| JVM_END |
| |
| |
| // Printing support ////////////////////////////////////////////////// |
| extern "C" { |
| |
| ATTRIBUTE_PRINTF(3, 0) |
| int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) { |
| // see bug 4399518, 4417214 |
| if ((intptr_t)count <= 0) return -1; |
| return vsnprintf(str, count, fmt, args); |
| } |
| |
| ATTRIBUTE_PRINTF(3, 0) |
| int jio_snprintf(char *str, size_t count, const char *fmt, ...) { |
| va_list args; |
| int len; |
| va_start(args, fmt); |
| len = jio_vsnprintf(str, count, fmt, args); |
| va_end(args); |
| return len; |
| } |
| |
| ATTRIBUTE_PRINTF(2,3) |
| int jio_fprintf(FILE* f, const char *fmt, ...) { |
| int len; |
| va_list args; |
| va_start(args, fmt); |
| len = jio_vfprintf(f, fmt, args); |
| va_end(args); |
| return len; |
| } |
| |
| ATTRIBUTE_PRINTF(2, 0) |
| int jio_vfprintf(FILE* f, const char *fmt, va_list args) { |
| if (Arguments::vfprintf_hook() != NULL) { |
| return Arguments::vfprintf_hook()(f, fmt, args); |
| } else { |
| return vfprintf(f, fmt, args); |
| } |
| } |
| |
| ATTRIBUTE_PRINTF(1, 2) |
| JNIEXPORT int jio_printf(const char *fmt, ...) { |
| int len; |
| va_list args; |
| va_start(args, fmt); |
| len = jio_vfprintf(defaultStream::output_stream(), fmt, args); |
| va_end(args); |
| return len; |
| } |
| |
| |
| // HotSpot specific jio method |
| void jio_print(const char* s) { |
| // Try to make this function as atomic as possible. |
| if (Arguments::vfprintf_hook() != NULL) { |
| jio_fprintf(defaultStream::output_stream(), "%s", s); |
| } else { |
| // Make an unused local variable to avoid warning from gcc 4.x compiler. |
| size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s)); |
| } |
| } |
| |
| } // Extern C |
| |
| // java.lang.Thread ////////////////////////////////////////////////////////////////////////////// |
| |
| // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock |
| // to prevent the target thread from exiting after we have a pointer to the C++ Thread or |
| // OSThread objects. The exception to this rule is when the target object is the thread |
| // doing the operation, in which case we know that the thread won't exit until the |
| // operation is done (all exits being voluntary). There are a few cases where it is |
| // rather silly to do operations on yourself, like resuming yourself or asking whether |
| // you are alive. While these can still happen, they are not subject to deadlocks if |
| // the lock is held while the operation occurs (this is not the case for suspend, for |
| // instance), and are very unlikely. Because IsAlive needs to be fast and its |
| // implementation is local to this file, we always lock Threads_lock for that one. |
| |
| static void thread_entry(JavaThread* thread, TRAPS) { |
| HandleMark hm(THREAD); |
| Handle obj(THREAD, thread->threadObj()); |
| JavaValue result(T_VOID); |
| JavaCalls::call_virtual(&result, |
| obj, |
| KlassHandle(THREAD, SystemDictionary::Thread_klass()), |
| vmSymbols::run_method_name(), |
| vmSymbols::void_method_signature(), |
| THREAD); |
| } |
| |
| |
| JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread)) |
| JVMWrapper("JVM_StartThread"); |
| JavaThread *native_thread = NULL; |
| |
| // We cannot hold the Threads_lock when we throw an exception, |
| // due to rank ordering issues. Example: we might need to grab the |
| // Heap_lock while we construct the exception. |
| bool throw_illegal_thread_state = false; |
| |
| // We must release the Threads_lock before we can post a jvmti event |
| // in Thread::start. |
| { |
| // Ensure that the C++ Thread and OSThread structures aren't freed before |
| // we operate. |
| MutexLocker mu(Threads_lock); |
| |
| // Since JDK 5 the java.lang.Thread threadStatus is used to prevent |
| // re-starting an already started thread, so we should usually find |
| // that the JavaThread is null. However for a JNI attached thread |
| // there is a small window between the Thread object being created |
| // (with its JavaThread set) and the update to its threadStatus, so we |
| // have to check for this |
| if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) { |
| throw_illegal_thread_state = true; |
| } else { |
| // We could also check the stillborn flag to see if this thread was already stopped, but |
| // for historical reasons we let the thread detect that itself when it starts running |
| |
| jlong size = |
| java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread)); |
| // Allocate the C++ Thread structure and create the native thread. The |
| // stack size retrieved from java is signed, but the constructor takes |
| // size_t (an unsigned type), so avoid passing negative values which would |
| // result in really large stacks. |
| size_t sz = size > 0 ? (size_t) size : 0; |
| native_thread = new JavaThread(&thread_entry, sz); |
| |
| // At this point it may be possible that no osthread was created for the |
| // JavaThread due to lack of memory. Check for this situation and throw |
| // an exception if necessary. Eventually we may want to change this so |
| // that we only grab the lock if the thread was created successfully - |
| // then we can also do this check and throw the exception in the |
| // JavaThread constructor. |
| if (native_thread->osthread() != NULL) { |
| // Note: the current thread is not being used within "prepare". |
| native_thread->prepare(jthread); |
| } |
| } |
| } |
| |
| if (throw_illegal_thread_state) { |
| THROW(vmSymbols::java_lang_IllegalThreadStateException()); |
| } |
| |
| assert(native_thread != NULL, "Starting null thread?"); |
| |
| if (native_thread->osthread() == NULL) { |
| // No one should hold a reference to the 'native_thread'. |
| delete native_thread; |
| if (JvmtiExport::should_post_resource_exhausted()) { |
| JvmtiExport::post_resource_exhausted( |
| JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS, |
| "unable to create new native thread"); |
| } |
| THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), |
| "unable to create new native thread"); |
| } |
| |
| Thread::start(native_thread); |
| |
| JVM_END |
| |
| // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints |
| // before the quasi-asynchronous exception is delivered. This is a little obtrusive, |
| // but is thought to be reliable and simple. In the case, where the receiver is the |
| // same thread as the sender, no safepoint is needed. |
| JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable)) |
| JVMWrapper("JVM_StopThread"); |
| |
| oop java_throwable = JNIHandles::resolve(throwable); |
| if (java_throwable == NULL) { |
| THROW(vmSymbols::java_lang_NullPointerException()); |
| } |
| oop java_thread = JNIHandles::resolve_non_null(jthread); |
| JavaThread* receiver = java_lang_Thread::thread(java_thread); |
| Events::log_exception(JavaThread::current(), |
| "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", |
| p2i(receiver), p2i((address)java_thread), p2i(throwable)); |
| // First check if thread is alive |
| if (receiver != NULL) { |
| // Check if exception is getting thrown at self (use oop equality, since the |
| // target object might exit) |
| if (java_thread == thread->threadObj()) { |
| THROW_OOP(java_throwable); |
| } else { |
| // Enques a VM_Operation to stop all threads and then deliver the exception... |
| Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable)); |
| } |
| } |
| else { |
| // Either: |
| // - target thread has not been started before being stopped, or |
| // - target thread already terminated |
| // We could read the threadStatus to determine which case it is |
| // but that is overkill as it doesn't matter. We must set the |
| // stillborn flag for the first case, and if the thread has already |
| // exited setting this flag has no affect |
| java_lang_Thread::set_stillborn(java_thread); |
| } |
| JVM_END |
| |
| |
| JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread)) |
| JVMWrapper("JVM_IsThreadAlive"); |
| |
| oop thread_oop = JNIHandles::resolve_non_null(jthread); |
| return java_lang_Thread::is_alive(thread_oop); |
| JVM_END |
| |
| |
| JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread)) |
| JVMWrapper("JVM_SuspendThread"); |
| oop java_thread = JNIHandles::resolve_non_null(jthread); |
| JavaThread* receiver = java_lang_Thread::thread(java_thread); |
| |
| if (receiver != NULL) { |
| // thread has run and has not exited (still on threads list) |
| |
| { |
| MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag); |
| if (receiver->is_external_suspend()) { |
| // Don't allow nested external suspend requests. We can't return |
| // an error from this interface so just ignore the problem. |
| return; |
| } |
| if (receiver->is_exiting()) { // thread is in the process of exiting |
| return; |
| } |
| receiver->set_external_suspend(); |
| } |
| |
| // java_suspend() will catch threads in the process of exiting |
| // and will ignore them. |
| receiver->java_suspend(); |
| |
| // It would be nice to have the following assertion in all the |
| // time, but it is possible for a racing resume request to have |
| // resumed this thread right after we suspended it. Temporarily |
| // enable this assertion if you are chasing a different kind of |
| // bug. |
| // |
| // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL || |
| // receiver->is_being_ext_suspended(), "thread is not suspended"); |
| } |
| JVM_END |
| |
| |
| JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread)) |
| JVMWrapper("JVM_ResumeThread"); |
| // Ensure that the C++ Thread and OSThread structures aren't freed before we operate. |
| // We need to *always* get the threads lock here, since this operation cannot be allowed during |
| // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other |
| // threads randomly resumes threads, then a thread might not be suspended when the safepoint code |
| // looks at it. |
| MutexLocker ml(Threads_lock); |
| JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); |
| if (thr != NULL) { |
| // the thread has run and is not in the process of exiting |
| thr->java_resume(); |
| } |
| JVM_END |
| |
| |
| JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio)) |
| JVMWrapper("JVM_SetThreadPriority"); |
| // Ensure that the C++ Thread and OSThread structures aren't freed before we operate |
| MutexLocker ml(Threads_lock); |
| oop java_thread = JNIHandles::resolve_non_null(jthread); |
| java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio); |
| JavaThread* thr = java_lang_Thread::thread(java_thread); |
| if (thr != NULL) { // Thread not yet started; priority pushed down when it is |
| Thread::set_priority(thr, (ThreadPriority)prio); |
| } |
| JVM_END |
| |
| |
| JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass)) |
| JVMWrapper("JVM_Yield"); |
| if (os::dont_yield()) return; |
| #ifndef USDT2 |
| HS_DTRACE_PROBE0(hotspot, thread__yield); |
| #else /* USDT2 */ |
| HOTSPOT_THREAD_YIELD(); |
| #endif /* USDT2 */ |
| // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield. |
| // Critical for similar threading behaviour |
| if (ConvertYieldToSleep) { |
| os::sleep(thread, MinSleepInterval, false); |
| } else { |
| os::yield(); |
| } |
| JVM_END |
| |
| |
| JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis)) |
| JVMWrapper("JVM_Sleep"); |
| |
| if (millis < 0) { |
| THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative"); |
| } |
| |
| if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) { |
| THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); |
| } |
| |
| // Save current thread state and restore it at the end of this block. |
| // And set new thread state to SLEEPING. |
| JavaThreadSleepState jtss(thread); |
| |
| #ifndef USDT2 |
| HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis); |
| #else /* USDT2 */ |
| HOTSPOT_THREAD_SLEEP_BEGIN( |
| millis); |
| #endif /* USDT2 */ |
| |
| EventThreadSleep event; |
| |
| if (millis == 0) { |
| // When ConvertSleepToYield is on, this matches the classic VM implementation of |
| // JVM_Sleep. Critical for similar threading behaviour (Win32) |
| // It appears that in certain GUI contexts, it may be beneficial to do a short sleep |
| // for SOLARIS |
| if (ConvertSleepToYield) { |
| os::yield(); |
| } else { |
| ThreadState old_state = thread->osthread()->get_state(); |
| thread->osthread()->set_state(SLEEPING); |
| os::sleep(thread, MinSleepInterval, false); |
| thread->osthread()->set_state(old_state); |
| } |
| } else { |
| ThreadState old_state = thread->osthread()->get_state(); |
| thread->osthread()->set_state(SLEEPING); |
| if (os::sleep(thread, millis, true) == OS_INTRPT) { |
| // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on |
| // us while we were sleeping. We do not overwrite those. |
| if (!HAS_PENDING_EXCEPTION) { |
| if (event.should_commit()) { |
| event.set_time(millis); |
| event.commit(); |
| } |
| #ifndef USDT2 |
| HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1); |
| #else /* USDT2 */ |
| HOTSPOT_THREAD_SLEEP_END( |
| 1); |
| #endif /* USDT2 */ |
| // TODO-FIXME: THROW_MSG returns which means we will not call set_state() |
| // to properly restore the thread state. That's likely wrong. |
| THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); |
| } |
| } |
| thread->osthread()->set_state(old_state); |
| } |
| if (event.should_commit()) { |
| event.set_time(millis); |
| event.commit(); |
| } |
| #ifndef USDT2 |
| HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0); |
| #else /* USDT2 */ |
| HOTSPOT_THREAD_SLEEP_END( |
| 0); |
| #endif /* USDT2 */ |
| JVM_END |
| |
| JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass)) |
| JVMWrapper("JVM_CurrentThread"); |
| oop jthread = thread->threadObj(); |
| assert (thread != NULL, "no current thread!"); |
| return JNIHandles::make_local(env, jthread); |
| JVM_END |
| |
| |
| JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread)) |
| JVMWrapper("JVM_CountStackFrames"); |
| |
| // Ensure that the C++ Thread and OSThread structures aren't freed before we operate |
| oop java_thread = JNIHandles::resolve_non_null(jthread); |
| bool throw_illegal_thread_state = false; |
| int count = 0; |
| |
| { |
| MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); |
| // We need to re-resolve the java_thread, since a GC might have happened during the |
| // acquire of the lock |
| JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); |
| |
| if (thr == NULL) { |
| // do nothing |
| } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) { |
| // Check whether this java thread has been suspended already. If not, throws |
| // IllegalThreadStateException. We defer to throw that exception until |
| // Threads_lock is released since loading exception class has to leave VM. |
| // The correct way to test a thread is actually suspended is |
| // wait_for_ext_suspend_completion(), but we can't call that while holding |
| // the Threads_lock. The above tests are sufficient for our purposes |
| // provided the walkability of the stack is stable - which it isn't |
| // 100% but close enough for most practical purposes. |
| throw_illegal_thread_state = true; |
| } else { |
| // Count all java activation, i.e., number of vframes |
| for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) { |
| // Native frames are not counted |
| if (!vfst.method()->is_native()) count++; |
| } |
| } |
| } |
| |
| if (throw_illegal_thread_state) { |
| THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(), |
| "this thread is not suspended"); |
| } |
| return count; |
| JVM_END |
| |
| // Consider: A better way to implement JVM_Interrupt() is to acquire |
| // Threads_lock to resolve the jthread into a Thread pointer, fetch |
| // Thread->platformevent, Thread->native_thr, Thread->parker, etc., |
| // drop Threads_lock, and the perform the unpark() and thr_kill() operations |
| // outside the critical section. Threads_lock is hot so we want to minimize |
| // the hold-time. A cleaner interface would be to decompose interrupt into |
| // two steps. The 1st phase, performed under Threads_lock, would return |
| // a closure that'd be invoked after Threads_lock was dropped. |
| // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and |
| // admit spurious wakeups. |
| |
| JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread)) |
| JVMWrapper("JVM_Interrupt"); |
| |
| // Ensure that the C++ Thread and OSThread structures aren't freed before we operate |
| oop java_thread = JNIHandles::resolve_non_null(jthread); |
| MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); |
| // We need to re-resolve the java_thread, since a GC might have happened during the |
| // acquire of the lock |
| JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); |
| if (thr != NULL) { |
| Thread::interrupt(thr); |
| } |
| JVM_END |
| |
| |
| JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted)) |
| JVMWrapper("JVM_IsInterrupted"); |
| |
| // Ensure that the C++ Thread and OSThread structures aren't freed before we operate |
| oop java_thread = JNIHandles::resolve_non_null(jthread); |
| MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); |
| // We need to re-resolve the java_thread, since a GC might have happened during the |
| // acquire of the lock |
| JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); |
| if (thr == NULL) { |
| return JNI_FALSE; |
| } else { |
| return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0); |
| } |
| JVM_END |
| |
| |
| // Return true iff the current thread has locked the object passed in |
| |
| JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj)) |
| JVMWrapper("JVM_HoldsLock"); |
| assert(THREAD->is_Java_thread(), "sanity check"); |
| if (obj == NULL) { |
| THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); |
| } |
| Handle h_obj(THREAD, JNIHandles::resolve(obj)); |
| return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj); |
| JVM_END |
| |
| |
| JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass)) |
| JVMWrapper("JVM_DumpAllStacks"); |
| VM_PrintThreads op; |
| VMThread::execute(&op); |
| if (JvmtiExport::should_post_data_dump()) { |
| JvmtiExport::post_data_dump(); |
| } |
| JVM_END |
| |
| JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name)) |
| JVMWrapper("JVM_SetNativeThreadName"); |
| ResourceMark rm(THREAD); |
| oop java_thread = JNIHandles::resolve_non_null(jthread); |
| JavaThread* thr = java_lang_Thread::thread(java_thread); |
| // Thread naming only supported for the current thread, doesn't work for |
| // target threads. |
| if (Thread::current() == thr && !thr->has_attached_via_jni()) { |
| // we don't set the name of an attached thread to avoid stepping |
| // on other programs |
| const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); |
| os::set_native_thread_name(thread_name); |
| } |
| JVM_END |
| |
| // java.lang.SecurityManager /////////////////////////////////////////////////////////////////////// |
| |
| static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) { |
| assert(jthread->is_Java_thread(), "must be a Java thread"); |
| if (jthread->privileged_stack_top() == NULL) return false; |
| if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) { |
| oop loader = jthread->privileged_stack_top()->class_loader(); |
| if (loader == NULL) return true; |
| bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); |
| if (trusted) return true; |
| } |
| return false; |
| } |
| |
| JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env)) |
| JVMWrapper("JVM_CurrentLoadedClass"); |
| ResourceMark rm(THREAD); |
| |
| for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { |
| // if a method in a class in a trusted loader is in a doPrivileged, return NULL |
| bool trusted = is_trusted_frame(thread, &vfst); |
| if (trusted) return NULL; |
| |
| Method* m = vfst.method(); |
| if (!m->is_native()) { |
| InstanceKlass* holder = m->method_holder(); |
| oop loader = holder->class_loader(); |
| if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { |
| return (jclass) JNIHandles::make_local(env, holder->java_mirror()); |
| } |
| } |
| } |
| return NULL; |
| JVM_END |
| |
| |
| JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env)) |
| JVMWrapper("JVM_CurrentClassLoader"); |
| ResourceMark rm(THREAD); |
| |
| for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { |
| |
| // if a method in a class in a trusted loader is in a doPrivileged, return NULL |
| bool trusted = is_trusted_frame(thread, &vfst); |
| if (trusted) return NULL; |
| |
| Method* m = vfst.method(); |
| if (!m->is_native()) { |
| InstanceKlass* holder = m->method_holder(); |
| assert(holder->is_klass(), "just checking"); |
| oop loader = holder->class_loader(); |
| if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { |
| return JNIHandles::make_local(env, loader); |
| } |
| } |
| } |
| return NULL; |
| JVM_END |
| |
| |
| JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env)) |
| JVMWrapper("JVM_GetClassContext"); |
| ResourceMark rm(THREAD); |
| JvmtiVMObjectAllocEventCollector oam; |
| vframeStream vfst(thread); |
| |
| if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) { |
| // This must only be called from SecurityManager.getClassContext |
| Method* m = vfst.method(); |
| if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() && |
| m->name() == vmSymbols::getClassContext_name() && |
| m->signature() == vmSymbols::void_class_array_signature())) { |
| THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext"); |
| } |
| } |
| |
| // Collect method holders |
| GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>(); |
| for (; !vfst.at_end(); vfst.security_next()) { |
| Method* m = vfst.method(); |
| // Native frames are not returned |
| if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) { |
| Klass* holder = m->method_holder(); |
| assert(holder->is_klass(), "just checking"); |
| klass_array->append(holder); |
| } |
| } |
| |
| // Create result array of type [Ljava/lang/Class; |
| objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL); |
| // Fill in mirrors corresponding to method holders |
| for (int i = 0; i < klass_array->length(); i++) { |
| result->obj_at_put(i, klass_array->at(i)->java_mirror()); |
| } |
| |
| return (jobjectArray) JNIHandles::make_local(env, result); |
| JVM_END |
| |
| |
| JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name)) |
| JVMWrapper("JVM_ClassDepth"); |
| ResourceMark rm(THREAD); |
| Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); |
| Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0); |
| |
| const char* str = java_lang_String::as_utf8_string(class_name_str()); |
| TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str)); |
| if (class_name_sym == NULL) { |
| return -1; |
| } |
| |
| int depth = 0; |
| |
| for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { |
| if (!vfst.method()->is_native()) { |
| InstanceKlass* holder = vfst.method()->method_holder(); |
| assert(holder->is_klass(), "just checking"); |
| if (holder->name() == class_name_sym) { |
| return depth; |
| } |
| depth++; |
| } |
| } |
| return -1; |
| JVM_END |
| |
| |
| JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env)) |
| JVMWrapper("JVM_ClassLoaderDepth"); |
| ResourceMark rm(THREAD); |
| int depth = 0; |
| for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { |
| // if a method in a class in a trusted loader is in a doPrivileged, return -1 |
| bool trusted = is_trusted_frame(thread, &vfst); |
| if (trusted) return -1; |
| |
| Method* m = vfst.method(); |
| if (!m->is_native()) { |
| InstanceKlass* holder = m->method_holder(); |
| assert(holder->is_klass(), "just checking"); |
| oop loader = holder->class_loader(); |
| if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { |
| return depth; |
| } |
| depth++; |
| } |
| } |
| return -1; |
| JVM_END |
| |
| |
| // java.lang.Package //////////////////////////////////////////////////////////////// |
| |
| |
| JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name)) |
| JVMWrapper("JVM_GetSystemPackage"); |
| ResourceMark rm(THREAD); |
| JvmtiVMObjectAllocEventCollector oam; |
| char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); |
| oop result = ClassLoader::get_system_package(str, CHECK_NULL); |
| return (jstring) JNIHandles::make_local(result); |
| JVM_END |
| |
| |
| JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env)) |
| JVMWrapper("JVM_GetSystemPackages"); |
| JvmtiVMObjectAllocEventCollector oam; |
| objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL); |
| return (jobjectArray) JNIHandles::make_local(result); |
| JVM_END |
| |
| |
| // ObjectInputStream /////////////////////////////////////////////////////////////// |
| |
| bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) { |
| if (current_class == NULL) { |
| return true; |
| } |
| if ((current_class == field_class) || access.is_public()) { |
| return true; |
| } |
| |
| if (access.is_protected()) { |
| // See if current_class is a subclass of field_class |
| if (current_class->is_subclass_of(field_class)) { |
| return true; |
| } |
| } |
| |
| return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class)); |
| } |
| |
| |
| // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4 |
| JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass)) |
| JVMWrapper("JVM_AllocateNewObject"); |
| JvmtiVMObjectAllocEventCollector oam; |
| // Receiver is not used |
| oop curr_mirror = JNIHandles::resolve_non_null(currClass); |
| oop init_mirror = JNIHandles::resolve_non_null(initClass); |
| |
| // Cannot instantiate primitive types |
| if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) { |
| ResourceMark rm(THREAD); |
| THROW_0(vmSymbols::java_lang_InvalidClassException()); |
| } |
| |
| // Arrays not allowed here, must use JVM_AllocateNewArray |
| if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() || |
| java_lang_Class::as_Klass(init_mirror)->oop_is_array()) { |
| ResourceMark rm(THREAD); |
| THROW_0(vmSymbols::java_lang_InvalidClassException()); |
| } |
| |
| instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror)); |
| instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror)); |
| |
| assert(curr_klass->is_subclass_of(init_klass()), "just checking"); |
| |
| // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly. |
| curr_klass->check_valid_for_instantiation(false, CHECK_NULL); |
| |
| // Make sure klass is initialized, since we are about to instantiate one of them. |
| curr_klass->initialize(CHECK_NULL); |
| |
| methodHandle m (THREAD, |
| init_klass->find_method(vmSymbols::object_initializer_name(), |
| vmSymbols::void_method_signature())); |
| if (m.is_null()) { |
| ResourceMark rm(THREAD); |
| THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), |
| Method::name_and_sig_as_C_string(init_klass(), |
| vmSymbols::object_initializer_name(), |
| vmSymbols::void_method_signature())); |
| } |
| |
| if (curr_klass == init_klass && !m->is_public()) { |
| // Calling the constructor for class 'curr_klass'. |
| // Only allow calls to a public no-arg constructor. |
| // This path corresponds to creating an Externalizable object. |
| THROW_0(vmSymbols::java_lang_IllegalAccessException()); |
| } |
| |
| if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) { |
| // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb' |
| THROW_0(vmSymbols::java_lang_IllegalAccessException()); |
| } |
| |
| Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL); |
| // Call constructor m. This might call a constructor higher up in the hierachy |
| JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL); |
| |
| return JNIHandles::make_local(obj()); |
| JVM_END |
| |
| |
| JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length)) |
| JVMWrapper("JVM_AllocateNewArray"); |
| JvmtiVMObjectAllocEventCollector oam; |
| oop mirror = JNIHandles::resolve_non_null(currClass); |
| |
| if (java_lang_Class::is_primitive(mirror)) { |
| THROW_0(vmSymbols::java_lang_InvalidClassException()); |
| } |
| Klass* k = java_lang_Class::as_Klass(mirror); |
| oop result; |
| |
| if (k->oop_is_typeArray()) { |
| // typeArray |
| result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL); |
| } else if (k->oop_is_objArray()) { |
| // objArray |
| ObjArrayKlass* oak = ObjArrayKlass::cast(k); |
| oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior) |
| result = oak->allocate(length, CHECK_NULL); |
| } else { |
| THROW_0(vmSymbols::java_lang_InvalidClassException()); |
| } |
| return JNIHandles::make_local(env, result); |
| JVM_END |
| |
| |
| // Return the first non-null class loader up the execution stack, or null |
| // if only code from the null class loader is on the stack. |
| |
| JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env)) |
| for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { |
| // UseNewReflection |
| vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection |
| oop loader = vfst.method()->method_holder()->class_loader(); |
| if (loader != NULL) { |
| return JNIHandles::make_local(env, loader); |
| } |
| } |
| return NULL; |
| JVM_END |
| |
| |
| // Load a class relative to the most recent class on the stack with a non-null |
| // classloader. |
| // This function has been deprecated and should not be considered part of the |
| // specified JVM interface. |
| |
| JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver, |
| jclass currClass, jstring currClassName)) |
| JVMWrapper("JVM_LoadClass0"); |
| // Receiver is not used |
| ResourceMark rm(THREAD); |
| |
| // Class name argument is not guaranteed to be in internal format |
| Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName)); |
| Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL); |
| |
| const char* str = java_lang_String::as_utf8_string(string()); |
| |
| if (str == NULL || (int)strlen(str) > Symbol::max_length()) { |
| // It's impossible to create this class; the name cannot fit |
| // into the constant pool. |
| THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str); |
| } |
| |
| TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL); |
| Handle curr_klass (THREAD, JNIHandles::resolve(currClass)); |
| // Find the most recent class on the stack with a non-null classloader |
| oop loader = NULL; |
| oop protection_domain = NULL; |
| if (curr_klass.is_null()) { |
| for (vframeStream vfst(thread); |
| !vfst.at_end() && loader == NULL; |
| vfst.next()) { |
| if (!vfst.method()->is_native()) { |
| InstanceKlass* holder = vfst.method()->method_holder(); |
| loader = holder->class_loader(); |
| protection_domain = holder->protection_domain(); |
| } |
| } |
| } else { |
| Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass()); |
| loader = InstanceKlass::cast(curr_klass_oop)->class_loader(); |
| protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain(); |
| } |
| Handle h_loader(THREAD, loader); |
| Handle h_prot (THREAD, protection_domain); |
| jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot, |
| false, thread); |
| if (TraceClassResolution && result != NULL) { |
| trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); |
| } |
| return result; |
| JVM_END |
| |
| |
| // Array /////////////////////////////////////////////////////////////////////////////////////////// |
| |
| |
| // resolve array handle and check arguments |
| static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) { |
| if (arr == NULL) { |
| THROW_0(vmSymbols::java_lang_NullPointerException()); |
| } |
| oop a = JNIHandles::resolve_non_null(arr); |
| if (!a->is_array() || (type_array_only && !a->is_typeArray())) { |
| THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array"); |
| } |
| return arrayOop(a); |
| } |
| |
| |
| JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr)) |
| JVMWrapper("JVM_GetArrayLength"); |
| arrayOop a = check_array(env, arr, false, CHECK_0); |
| return a->length(); |
| JVM_END |
| |
| |
| JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index)) |
| JVMWrapper("JVM_Array_Get"); |
| JvmtiVMObjectAllocEventCollector oam; |
| arrayOop a = check_array(env, arr, false, CHECK_NULL); |
| jvalue value; |
| BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL); |
| oop box = Reflection::box(&value, type, CHECK_NULL); |
| return JNIHandles::make_local(env, box); |
| JVM_END |
| |
| |
| JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode)) |
| JVMWrapper("JVM_GetPrimitiveArrayElement"); |
| jvalue value; |
| value.i = 0; // to initialize value before getting used in CHECK |
| arrayOop a = check_array(env, arr, true, CHECK_(value)); |
| assert(a->is_typeArray(), "just checking"); |
| BasicType type = Reflection::array_get(&value, a, index, CHECK_(value)); |
| BasicType wide_type = (BasicType) wCode; |
| if (type != wide_type) { |
| Reflection::widen(&value, type, wide_type, CHECK_(value)); |
| } |
| return value; |
| JVM_END |
| |
| |
| JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val)) |
| JVMWrapper("JVM_SetArrayElement"); |
| arrayOop a = check_array(env, arr, false, CHECK); |
| oop box = JNIHandles::resolve(val); |
| jvalue value; |
| value.i = 0; // to initialize value before getting used in CHECK |
| BasicType value_type; |
| if (a->is_objArray()) { |
| // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array |
| value_type = Reflection::unbox_for_regular_object(box, &value); |
| } else { |
| value_type = Reflection::unbox_for_primitive(box, &value, CHECK); |
| } |
| Reflection::array_set(&value, a, index, value_type, CHECK); |
| JVM_END |
| |
| |
| JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode)) |
| JVMWrapper("JVM_SetPrimitiveArrayElement"); |
| arrayOop a = check_array(env, arr, true, CHECK); |
| assert(a->is_typeArray(), "just checking"); |
| BasicType value_type = (BasicType) vCode; |
| Reflection::array_set(&v, a, index, value_type, CHECK); |
| JVM_END |
| |
| |
| JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length)) |
| JVMWrapper("JVM_NewArray"); |
| JvmtiVMObjectAllocEventCollector oam; |
| oop element_mirror = JNIHandles::resolve(eltClass); |
| oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL); |
| return JNIHandles::make_local(env, result); |
| JVM_END |
| |
| |
| JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim)) |
| JVMWrapper("JVM_NewMultiArray"); |
| JvmtiVMObjectAllocEventCollector oam; |
| arrayOop dim_array = check_array(env, dim, true, CHECK_NULL); |
| oop element_mirror = JNIHandles::resolve(eltClass); |
| assert(dim_array->is_typeArray(), "just checking"); |
| oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL); |
| return JNIHandles::make_local(env, result); |
| JVM_END |
| |
| |
| // Networking library support //////////////////////////////////////////////////////////////////// |
| |
| JVM_LEAF(jint, JVM_InitializeSocketLibrary()) |
| JVMWrapper("JVM_InitializeSocketLibrary"); |
| return 0; |
| JVM_END |
| |
| |
| JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol)) |
| JVMWrapper("JVM_Socket"); |
| return os::socket(domain, type, protocol); |
| JVM_END |
| |
| |
| JVM_LEAF(jint, JVM_SocketClose(jint fd)) |
| JVMWrapper2("JVM_SocketClose (0x%x)", fd); |
| //%note jvm_r6 |
| return os::socket_close(fd); |
| JVM_END |
| |
| |
| JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto)) |
| JVMWrapper2("JVM_SocketShutdown (0x%x)", fd); |
| //%note jvm_r6 |
| return os::socket_shutdown(fd, howto); |
| JVM_END |
| |
| |
| JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags)) |
| JVMWrapper2("JVM_Recv (0x%x)", fd); |
| //%note jvm_r6 |
| return os::recv(fd, buf, (size_t)nBytes, (uint)flags); |
| JVM_END |
| |
| |
| JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags)) |
| JVMWrapper2("JVM_Send (0x%x)", fd); |
| //%note jvm_r6 |
| return os::send(fd, buf, (size_t)nBytes, (uint)flags); |
| JVM_END |
| |
| |
| JVM_LEAF(jint, JVM_Timeout(int fd, long timeout)) |
| JVMWrapper2("JVM_Timeout (0x%x)", fd); |
| //%note jvm_r6 |
| return os::timeout(fd, timeout); |
| JVM_END |
| |
| |
| JVM_LEAF(jint, JVM_Listen(jint fd, jint count)) |
| JVMWrapper2("JVM_Listen (0x%x)", fd); |
| //%note jvm_r6 |
| return os::listen(fd, count); |
| JVM_END |
| |
| |
| JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len)) |
| JVMWrapper2("JVM_Connect (0x%x)", fd); |
| //%note jvm_r6 |
| return os::connect(fd, him, (socklen_t)len); |
| JVM_END |
| |
| |
| JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len)) |
| JVMWrapper2("JVM_Bind (0x%x)", fd); |
| //%note jvm_r6 |
| return os::bind(fd, him, (socklen_t)len); |
| JVM_END |
| |
| |
| JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len)) |
| JVMWrapper2("JVM_Accept (0x%x)", fd); |
| //%note jvm_r6 |
| socklen_t socklen = (socklen_t)(*len); |
| jint result = os::accept(fd, him, &socklen); |
| *len = (jint)socklen; |
| return result; |
| JVM_END |
| |
| |
| JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen)) |
| JVMWrapper2("JVM_RecvFrom (0x%x)", fd); |
| //%note jvm_r6 |
| socklen_t socklen = (socklen_t)(*fromlen); |
| jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen); |
| *fromlen = (int)socklen; |
| return result; |
| JVM_END |
| |
| |
| JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len)) |
| JVMWrapper2("JVM_GetSockName (0x%x)", fd); |
| //%note jvm_r6 |
| socklen_t socklen = (socklen_t)(*len); |
| jint result = os::get_sock_name(fd, him, &socklen); |
| *len = (int)socklen; |
| return result; |
| JVM_END |
| |
| |
| JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen)) |
| JVMWrapper2("JVM_SendTo (0x%x)", fd); |
| //%note jvm_r6 |
| return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen); |
| JVM_END |
| |
| |
| JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes)) |
| JVMWrapper2("JVM_SocketAvailable (0x%x)", fd); |
| //%note jvm_r6 |
| return os::socket_available(fd, pbytes); |
| JVM_END |
| |
| |
| JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen)) |
| JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); |
| //%note jvm_r6 |
| socklen_t socklen = (socklen_t)(*optlen); |
| jint result = os::get_sock_opt(fd, level, optname, optval, &socklen); |
| *optlen = (int)socklen; |
| return result; |
| JVM_END |
| |
| |
| JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen)) |
| JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); |
| //%note jvm_r6 |
| return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen); |
| JVM_END |
| |
| |
| JVM_LEAF(int, JVM_GetHostName(char* name, int namelen)) |
| JVMWrapper("JVM_GetHostName"); |
| return os::get_host_name(name, namelen); |
| JVM_END |
| |
| |
| // Library support /////////////////////////////////////////////////////////////////////////// |
| |
| JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name)) |
| //%note jvm_ct |
| JVMWrapper2("JVM_LoadLibrary (%s)", name); |
| char ebuf[1024]; |
| void *load_result; |
| { |
| ThreadToNativeFromVM ttnfvm(thread); |
| load_result = os::dll_load(name, ebuf, sizeof ebuf); |
| } |
| if (load_result == NULL) { |
| char msg[1024]; |
| jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf); |
| // Since 'ebuf' may contain a string encoded using |
| // platform encoding scheme, we need to pass |
| // Exceptions::unsafe_to_utf8 to the new_exception method |
| // as the last argument. See bug 6367357. |
| Handle h_exception = |
| Exceptions::new_exception(thread, |
| vmSymbols::java_lang_UnsatisfiedLinkError(), |
| msg, Exceptions::unsafe_to_utf8); |
| |
| THROW_HANDLE_0(h_exception); |
| } |
| return load_result; |
| JVM_END |
| |
| |
| JVM_LEAF(void, JVM_UnloadLibrary(void* handle)) |
| JVMWrapper("JVM_UnloadLibrary"); |
| os::dll_unload(handle); |
| JVM_END |
| |
| |
| JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name)) |
| JVMWrapper2("JVM_FindLibraryEntry (%s)", name); |
| return os::dll_lookup(handle, name); |
| JVM_END |
| |
| |
| // Floating point support //////////////////////////////////////////////////////////////////// |
| |
| JVM_LEAF(jboolean, JVM_IsNaN(jdouble a)) |
| JVMWrapper("JVM_IsNaN"); |
| return g_isnan(a); |
| JVM_END |
| |
| |
| // JNI version /////////////////////////////////////////////////////////////////////////////// |
| |
| JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version)) |
| JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version); |
| return Threads::is_supported_jni_version_including_1_1(version); |
| JVM_END |
| |
| |
| // String support /////////////////////////////////////////////////////////////////////////// |
| |
| JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str)) |
| JVMWrapper("JVM_InternString"); |
| JvmtiVMObjectAllocEventCollector oam; |
| if (str == NULL) return NULL; |
| oop string = JNIHandles::resolve_non_null(str); |
| oop result = StringTable::intern(string, CHECK_NULL); |
| return (jstring) JNIHandles::make_local(env, result); |
| JVM_END |
| |
| |
| // Raw monitor support ////////////////////////////////////////////////////////////////////// |
| |
| // The lock routine below calls lock_without_safepoint_check in order to get a raw lock |
| // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because |
| // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check |
| // that only works with java threads. |
| |
| |
| JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) { |
| VM_Exit::block_if_vm_exited(); |
| JVMWrapper("JVM_RawMonitorCreate"); |
| return new Mutex(Mutex::native, "JVM_RawMonitorCreate"); |
| } |
| |
| |
| JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) { |
| VM_Exit::block_if_vm_exited(); |
| JVMWrapper("JVM_RawMonitorDestroy"); |
| delete ((Mutex*) mon); |
| } |
| |
| |
| JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) { |
| VM_Exit::block_if_vm_exited(); |
| JVMWrapper("JVM_RawMonitorEnter"); |
| ((Mutex*) mon)->jvm_raw_lock(); |
| return 0; |
| } |
| |
| |
| JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) { |
| VM_Exit::block_if_vm_exited(); |
| JVMWrapper("JVM_RawMonitorExit"); |
| ((Mutex*) mon)->jvm_raw_unlock(); |
| } |
| |
| |
| // Support for Serialization |
| |
| typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value); |
| typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value); |
| typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value); |
| typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value); |
| |
| static IntBitsToFloatFn int_bits_to_float_fn = NULL; |
| static LongBitsToDoubleFn long_bits_to_double_fn = NULL; |
| static FloatToIntBitsFn float_to_int_bits_fn = NULL; |
| static DoubleToLongBitsFn double_to_long_bits_fn = NULL; |
| |
| |
| void initialize_converter_functions() { |
| if (JDK_Version::is_gte_jdk14x_version()) { |
| // These functions only exist for compatibility with 1.3.1 and earlier |
| return; |
| } |
| |
| // called from universe_post_init() |
| assert( |
| int_bits_to_float_fn == NULL && |
| long_bits_to_double_fn == NULL && |
| float_to_int_bits_fn == NULL && |
| double_to_long_bits_fn == NULL , |
| "initialization done twice" |
| ); |
| // initialize |
| int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F")); |
| long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D")); |
| float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I")); |
| double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J")); |
| // verify |
| assert( |
| int_bits_to_float_fn != NULL && |
| long_bits_to_double_fn != NULL && |
| float_to_int_bits_fn != NULL && |
| double_to_long_bits_fn != NULL , |
| "initialization failed" |
| ); |
| } |
| |
| |
| |
| // Shared JNI/JVM entry points ////////////////////////////////////////////////////////////// |
| |
| jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, |
| Handle loader, Handle protection_domain, |
| jboolean throwError, TRAPS) { |
| // Security Note: |
| // The Java level wrapper will perform the necessary security check allowing |
| // us to pass the NULL as the initiating class loader. The VM is responsible for |
| // the checkPackageAccess relative to the initiating class loader via the |
| // protection_domain. The protection_domain is passed as NULL by the java code |
| // if there is no security manager in 3-arg Class.forName(). |
| Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL); |
| |
| KlassHandle klass_handle(THREAD, klass); |
| // Check if we should initialize the class |
| if (init && klass_handle->oop_is_instance()) { |
| klass_handle->initialize(CHECK_NULL); |
| } |
| return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror()); |
| } |
| |
| |
| // Internal SQE debugging support /////////////////////////////////////////////////////////// |
| |
| #ifndef PRODUCT |
| |
| extern "C" { |
| JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get); |
| JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get); |
| JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj); |
| } |
| |
| JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get)) |
| JVMWrapper("JVM_AccessBoolVMFlag"); |
| return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, Flag::INTERNAL); |
| JVM_END |
| |
| JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get)) |
| JVMWrapper("JVM_AccessVMIntFlag"); |
| intx v; |
| jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, Flag::INTERNAL); |
| *value = (jint)v; |
| return result; |
| JVM_END |
| |
| |
| JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj)) |
| JVMWrapper("JVM_VMBreakPoint"); |
| oop the_obj = JNIHandles::resolve(obj); |
| BREAKPOINT; |
| JVM_END |
| |
| |
| #endif |
| |
| |
| // Method /////////////////////////////////////////////////////////////////////////////////////////// |
| |
| JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0)) |
| JVMWrapper("JVM_InvokeMethod"); |
| Handle method_handle; |
| if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) { |
| method_handle = Handle(THREAD, JNIHandles::resolve(method)); |
| Handle receiver(THREAD, JNIHandles::resolve(obj)); |
| objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); |
| oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL); |
| jobject res = JNIHandles::make_local(env, result); |
| if (JvmtiExport::should_post_vm_object_alloc()) { |
| oop ret_type = java_lang_reflect_Method::return_type(method_handle()); |
| assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!"); |
| if (java_lang_Class::is_primitive(ret_type)) { |
| // Only for primitive type vm allocates memory for java object. |
| // See box() method. |
| JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); |
| } |
| } |
| return res; |
| } else { |
| THROW_0(vmSymbols::java_lang_StackOverflowError()); |
| } |
| JVM_END |
| |
| |
| JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0)) |
| JVMWrapper("JVM_NewInstanceFromConstructor"); |
| oop constructor_mirror = JNIHandles::resolve(c); |
| objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); |
| oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL); |
| jobject res = JNIHandles::make_local(env, result); |
| if (JvmtiExport::should_post_vm_object_alloc()) { |
| JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); |
| } |
| return res; |
| JVM_END |
| |
| // Atomic /////////////////////////////////////////////////////////////////////////////////////////// |
| |
| JVM_LEAF(jboolean, JVM_SupportsCX8()) |
| JVMWrapper("JVM_SupportsCX8"); |
| return VM_Version::supports_cx8(); |
| JVM_END |
| |
| |
| JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal)) |
| JVMWrapper("JVM_CX8Field"); |
| jlong res; |
| oop o = JNIHandles::resolve(obj); |
| intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); |
| volatile jlong* addr = (volatile jlong*)((address)o + fldOffs); |
| |
| assert(VM_Version::supports_cx8(), "cx8 not supported"); |
| res = Atomic::cmpxchg(newVal, addr, oldVal); |
| |
| return res == oldVal; |
| JVM_END |
| |
| // DTrace /////////////////////////////////////////////////////////////////// |
| |
| JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env)) |
| JVMWrapper("JVM_DTraceGetVersion"); |
| return (jint)JVM_TRACING_DTRACE_VERSION; |
| JVM_END |
| |
| JVM_ENTRY(jlong,JVM_DTraceActivate( |
| JNIEnv* env, jint version, jstring module_name, jint providers_count, |
| JVM_DTraceProvider* providers)) |
| JVMWrapper("JVM_DTraceActivate"); |
| return DTraceJSDT::activate( |
| version, module_name, providers_count, providers, CHECK_0); |
| JVM_END |
| |
| JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method)) |
| JVMWrapper("JVM_DTraceIsProbeEnabled"); |
| return DTraceJSDT::is_probe_enabled(method); |
| JVM_END |
| |
| JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle)) |
| JVMWrapper("JVM_DTraceDispose"); |
| DTraceJSDT::dispose(handle); |
| JVM_END |
| |
| JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env)) |
| JVMWrapper("JVM_DTraceIsSupported"); |
| return DTraceJSDT::is_supported(); |
| JVM_END |
| |
| // Returns an array of all live Thread objects (VM internal JavaThreads, |
| // jvmti agent threads, and JNI attaching threads are skipped) |
| // See CR 6404306 regarding JNI attaching threads |
| JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy)) |
| ResourceMark rm(THREAD); |
| ThreadsListEnumerator tle(THREAD, false, false); |
| JvmtiVMObjectAllocEventCollector oam; |
| |
| int num_threads = tle.num_threads(); |
| objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL); |
| objArrayHandle threads_ah(THREAD, r); |
| |
| for (int i = 0; i < num_threads; i++) { |
| Handle h = tle.get_threadObj(i); |
| threads_ah->obj_at_put(i, h()); |
| } |
| |
| return (jobjectArray) JNIHandles::make_local(env, threads_ah()); |
| JVM_END |
| |
| |
| // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods |
| // Return StackTraceElement[][], each element is the stack trace of a thread in |
| // the corresponding entry in the given threads array |
| JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads)) |
| JVMWrapper("JVM_DumpThreads"); |
| JvmtiVMObjectAllocEventCollector oam; |
| |
| // Check if threads is null |
| if (threads == NULL) { |
| THROW_(vmSymbols::java_lang_NullPointerException(), 0); |
| } |
| |
| objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads)); |
| objArrayHandle ah(THREAD, a); |
| int num_threads = ah->length(); |
| // check if threads is non-empty array |
| if (num_threads == 0) { |
| THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); |
| } |
| |
| // check if threads is not an array of objects of Thread class |
| Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass(); |
| if (k != SystemDictionary::Thread_klass()) { |
| THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); |
| } |
| |
| ResourceMark rm(THREAD); |
| |
| GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); |
| for (int i = 0; i < num_threads; i++) { |
| oop thread_obj = ah->obj_at(i); |
| instanceHandle h(THREAD, (instanceOop) thread_obj); |
| thread_handle_array->append(h); |
| } |
| |
| Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL); |
| return (jobjectArray)JNIHandles::make_local(env, stacktraces()); |
| |
| JVM_END |
| |
| // JVM monitoring and management support |
| JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version)) |
| return Management::get_jmm_interface(version); |
| JVM_END |
| |
| // com.sun.tools.attach.VirtualMachine agent properties support |
| // |
| // Initialize the agent properties with the properties maintained in the VM |
| JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties)) |
| JVMWrapper("JVM_InitAgentProperties"); |
| ResourceMark rm; |
| |
| Handle props(THREAD, JNIHandles::resolve_non_null(properties)); |
| |
| PUTPROP(props, "sun.java.command", Arguments::java_command()); |
| PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags()); |
| PUTPROP(props, "sun.jvm.args", Arguments::jvm_args()); |
| return properties; |
| JVM_END |
| |
| JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass)) |
| { |
| JVMWrapper("JVM_GetEnclosingMethodInfo"); |
| JvmtiVMObjectAllocEventCollector oam; |
| |
| if (ofClass == NULL) { |
| return NULL; |
| } |
| Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass)); |
| // Special handling for primitive objects |
| if (java_lang_Class::is_primitive(mirror())) { |
| return NULL; |
| } |
| Klass* k = java_lang_Class::as_Klass(mirror()); |
| if (!k->oop_is_instance()) { |
| return NULL; |
| } |
| instanceKlassHandle ik_h(THREAD, k); |
| int encl_method_class_idx = ik_h->enclosing_method_class_index(); |
| if (encl_method_class_idx == 0) { |
| return NULL; |
| } |
| objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL); |
| objArrayHandle dest(THREAD, dest_o); |
| Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL); |
| dest->obj_at_put(0, enc_k->java_mirror()); |
| int encl_method_method_idx = ik_h->enclosing_method_method_index(); |
| if (encl_method_method_idx != 0) { |
| Symbol* sym = ik_h->constants()->symbol_at( |
| extract_low_short_from_int( |
| ik_h->constants()->name_and_type_at(encl_method_method_idx))); |
| Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); |
| dest->obj_at_put(1, str()); |
| sym = ik_h->constants()->symbol_at( |
| extract_high_short_from_int( |
| ik_h->constants()->name_and_type_at(encl_method_method_idx))); |
| str = java_lang_String::create_from_symbol(sym, CHECK_NULL); |
| dest->obj_at_put(2, str()); |
| } |
| return (jobjectArray) JNIHandles::make_local(dest()); |
| } |
| JVM_END |
| |
| JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env, |
| jint javaThreadState)) |
| { |
| // If new thread states are added in future JDK and VM versions, |
| // this should check if the JDK version is compatible with thread |
| // states supported by the VM. Return NULL if not compatible. |
| // |
| // This function must map the VM java_lang_Thread::ThreadStatus |
| // to the Java thread state that the JDK supports. |
| // |
| |
| typeArrayHandle values_h; |
| switch (javaThreadState) { |
| case JAVA_THREAD_STATE_NEW : { |
| typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); |
| values_h = typeArrayHandle(THREAD, r); |
| values_h->int_at_put(0, java_lang_Thread::NEW); |
| break; |
| } |
| case JAVA_THREAD_STATE_RUNNABLE : { |
| typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); |
| values_h = typeArrayHandle(THREAD, r); |
| values_h->int_at_put(0, java_lang_Thread::RUNNABLE); |
| break; |
| } |
| case JAVA_THREAD_STATE_BLOCKED : { |
| typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); |
| values_h = typeArrayHandle(THREAD, r); |
| values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); |
| break; |
| } |
| case JAVA_THREAD_STATE_WAITING : { |
| typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL); |
| values_h = typeArrayHandle(THREAD, r); |
| values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT); |
| values_h->int_at_put(1, java_lang_Thread::PARKED); |
| break; |
| } |
| case JAVA_THREAD_STATE_TIMED_WAITING : { |
| typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL); |
| values_h = typeArrayHandle(THREAD, r); |
| values_h->int_at_put(0, java_lang_Thread::SLEEPING); |
| values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED); |
| values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED); |
| break; |
| } |
| case JAVA_THREAD_STATE_TERMINATED : { |
| typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); |
| values_h = typeArrayHandle(THREAD, r); |
| values_h->int_at_put(0, java_lang_Thread::TERMINATED); |
| break; |
| } |
| default: |
| // Unknown state - probably incompatible JDK version |
| return NULL; |
| } |
| |
| return (jintArray) JNIHandles::make_local(env, values_h()); |
| } |
| JVM_END |
| |
| |
| JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env, |
| jint javaThreadState, |
| jintArray values)) |
| { |
| // If new thread states are added in future JDK and VM versions, |
| // this should check if the JDK version is compatible with thread |
| // states supported by the VM. Return NULL if not compatible. |
| // |
| // This function must map the VM java_lang_Thread::ThreadStatus |
| // to the Java thread state that the JDK supports. |
| // |
| |
| ResourceMark rm; |
| |
| // Check if threads is null |
| if (values == NULL) { |
| THROW_(vmSymbols::java_lang_NullPointerException(), 0); |
| } |
| |
| typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values)); |
| typeArrayHandle values_h(THREAD, v); |
| |
| objArrayHandle names_h; |
| switch (javaThreadState) { |
| case JAVA_THREAD_STATE_NEW : { |
| assert(values_h->length() == 1 && |
| values_h->int_at(0) == java_lang_Thread::NEW, |
| "Invalid threadStatus value"); |
| |
| objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
| 1, /* only 1 substate */ |
| CHECK_NULL); |
| names_h = objArrayHandle(THREAD, r); |
| Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL); |
| names_h->obj_at_put(0, name()); |
| break; |
| } |
| case JAVA_THREAD_STATE_RUNNABLE : { |
| assert(values_h->length() == 1 && |
| values_h->int_at(0) == java_lang_Thread::RUNNABLE, |
| "Invalid threadStatus value"); |
| |
| objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
| 1, /* only 1 substate */ |
| CHECK_NULL); |
| names_h = objArrayHandle(THREAD, r); |
| Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL); |
| names_h->obj_at_put(0, name()); |
| break; |
| } |
| case JAVA_THREAD_STATE_BLOCKED : { |
| assert(values_h->length() == 1 && |
| values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER, |
| "Invalid threadStatus value"); |
| |
| objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
| 1, /* only 1 substate */ |
| CHECK_NULL); |
| names_h = objArrayHandle(THREAD, r); |
| Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL); |
| names_h->obj_at_put(0, name()); |
| break; |
| } |
| case JAVA_THREAD_STATE_WAITING : { |
| assert(values_h->length() == 2 && |
| values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT && |
| values_h->int_at(1) == java_lang_Thread::PARKED, |
| "Invalid threadStatus value"); |
| objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
| 2, /* number of substates */ |
| CHECK_NULL); |
| names_h = objArrayHandle(THREAD, r); |
| Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT", |
| CHECK_NULL); |
| Handle name1 = java_lang_String::create_from_str("WAITING.PARKED", |
| CHECK_NULL); |
| names_h->obj_at_put(0, name0()); |
| names_h->obj_at_put(1, name1()); |
| break; |
| } |
| case JAVA_THREAD_STATE_TIMED_WAITING : { |
| assert(values_h->length() == 3 && |
| values_h->int_at(0) == java_lang_Thread::SLEEPING && |
| values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED && |
| values_h->int_at(2) == java_lang_Thread::PARKED_TIMED, |
| "Invalid threadStatus value"); |
| objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
| 3, /* number of substates */ |
| CHECK_NULL); |
| names_h = objArrayHandle(THREAD, r); |
| Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING", |
| CHECK_NULL); |
| Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT", |
| CHECK_NULL); |
| Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED", |
| CHECK_NULL); |
| names_h->obj_at_put(0, name0()); |
| names_h->obj_at_put(1, name1()); |
| names_h->obj_at_put(2, name2()); |
| break; |
| } |
| case JAVA_THREAD_STATE_TERMINATED : { |
| assert(values_h->length() == 1 && |
| values_h->int_at(0) == java_lang_Thread::TERMINATED, |
| "Invalid threadStatus value"); |
| objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
| 1, /* only 1 substate */ |
| CHECK_NULL); |
| names_h = objArrayHandle(THREAD, r); |
| Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL); |
| names_h->obj_at_put(0, name()); |
| break; |
| } |
| default: |
| // Unknown state - probably incompatible JDK version |
| return NULL; |
| } |
| return (jobjectArray) JNIHandles::make_local(env, names_h()); |
| } |
| JVM_END |
| |
| JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size)) |
| { |
| memset(info, 0, info_size); |
| |
| info->jvm_version = Abstract_VM_Version::jvm_version(); |
| info->update_version = 0; /* 0 in HotSpot Express VM */ |
| info->special_update_version = 0; /* 0 in HotSpot Express VM */ |
| |
| // when we add a new capability in the jvm_version_info struct, we should also |
| // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat |
| // counter defined in runtimeService.cpp. |
| info->is_attachable = AttachListener::is_attach_supported(); |
| } |
| JVM_END |