aoqi@0: /*
aoqi@0:  * Copyright (c) 2005, 2014, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: #include "precompiled.hpp"
aoqi@0: #include "classfile/javaClasses.hpp"
aoqi@0: #include "classfile/systemDictionary.hpp"
aoqi@0: #include "gc_implementation/shared/vmGCOperations.hpp"
aoqi@0: #include "memory/resourceArea.hpp"
aoqi@0: #include "prims/jvmtiExport.hpp"
aoqi@0: #include "runtime/arguments.hpp"
aoqi@0: #include "runtime/globals.hpp"
aoqi@0: #include "runtime/java.hpp"
aoqi@0: #include "runtime/javaCalls.hpp"
aoqi@0: #include "runtime/os.hpp"
aoqi@0: #include "services/attachListener.hpp"
aoqi@0: #include "services/diagnosticCommand.hpp"
aoqi@0: #include "services/heapDumper.hpp"
aoqi@0: 
aoqi@0: volatile bool AttachListener::_initialized;
aoqi@0: 
aoqi@0: // Implementation of "properties" command.
aoqi@0: //
aoqi@0: // Invokes sun.misc.VMSupport.serializePropertiesToByteArray to serialize
aoqi@0: // the system properties into a byte array.
aoqi@0: 
aoqi@0: static Klass* load_and_initialize_klass(Symbol* sh, TRAPS) {
aoqi@0:   Klass* k = SystemDictionary::resolve_or_fail(sh, true, CHECK_NULL);
aoqi@0:   instanceKlassHandle ik (THREAD, k);
aoqi@0:   if (ik->should_be_initialized()) {
aoqi@0:     ik->initialize(CHECK_NULL);
aoqi@0:   }
aoqi@0:   return ik();
aoqi@0: }
aoqi@0: 
aoqi@0: static jint get_properties(AttachOperation* op, outputStream* out, Symbol* serializePropertiesMethod) {
aoqi@0:   Thread* THREAD = Thread::current();
aoqi@0:   HandleMark hm;
aoqi@0: 
aoqi@0:   // load sun.misc.VMSupport
aoqi@0:   Symbol* klass = vmSymbols::sun_misc_VMSupport();
aoqi@0:   Klass* k = load_and_initialize_klass(klass, THREAD);
aoqi@0:   if (HAS_PENDING_EXCEPTION) {
aoqi@0:     java_lang_Throwable::print(PENDING_EXCEPTION, out);
aoqi@0:     CLEAR_PENDING_EXCEPTION;
aoqi@0:     return JNI_ERR;
aoqi@0:   }
aoqi@0:   instanceKlassHandle ik(THREAD, k);
aoqi@0: 
aoqi@0:   // invoke the serializePropertiesToByteArray method
aoqi@0:   JavaValue result(T_OBJECT);
aoqi@0:   JavaCallArguments args;
aoqi@0: 
aoqi@0: 
aoqi@0:   Symbol* signature = vmSymbols::serializePropertiesToByteArray_signature();
aoqi@0:   JavaCalls::call_static(&result,
aoqi@0:                            ik,
aoqi@0:                            serializePropertiesMethod,
aoqi@0:                            signature,
aoqi@0:                            &args,
aoqi@0:                            THREAD);
aoqi@0:   if (HAS_PENDING_EXCEPTION) {
aoqi@0:     java_lang_Throwable::print(PENDING_EXCEPTION, out);
aoqi@0:     CLEAR_PENDING_EXCEPTION;
aoqi@0:     return JNI_ERR;
aoqi@0:   }
aoqi@0: 
aoqi@0:   // The result should be a [B
aoqi@0:   oop res = (oop)result.get_jobject();
aoqi@0:   assert(res->is_typeArray(), "just checking");
aoqi@0:   assert(TypeArrayKlass::cast(res->klass())->element_type() == T_BYTE, "just checking");
aoqi@0: 
aoqi@0:   // copy the bytes to the output stream
aoqi@0:   typeArrayOop ba = typeArrayOop(res);
aoqi@0:   jbyte* addr = typeArrayOop(res)->byte_at_addr(0);
aoqi@0:   out->print_raw((const char*)addr, ba->length());
aoqi@0: 
aoqi@0:   return JNI_OK;
aoqi@0: }
aoqi@0: 
aoqi@0: // Implementation of "properties" command.
aoqi@0: // See also: PrintSystemPropertiesDCmd class
aoqi@0: static jint get_system_properties(AttachOperation* op, outputStream* out) {
aoqi@0:   return get_properties(op, out, vmSymbols::serializePropertiesToByteArray_name());
aoqi@0: }
aoqi@0: 
aoqi@0: // Implementation of "agent_properties" command.
aoqi@0: static jint get_agent_properties(AttachOperation* op, outputStream* out) {
aoqi@0:   return get_properties(op, out, vmSymbols::serializeAgentPropertiesToByteArray_name());
aoqi@0: }
aoqi@0: 
aoqi@0: // Implementation of "datadump" command.
aoqi@0: //
aoqi@0: // Raises a SIGBREAK signal so that VM dump threads, does deadlock detection,
aoqi@0: // etc. In theory this command should only post a DataDumpRequest to any
aoqi@0: // JVMTI environment that has enabled this event. However it's useful to
aoqi@0: // trigger the SIGBREAK handler.
aoqi@0: 
aoqi@0: static jint data_dump(AttachOperation* op, outputStream* out) {
aoqi@0:   if (!ReduceSignalUsage) {
aoqi@0:     AttachListener::pd_data_dump();
aoqi@0:   } else {
aoqi@0:     if (JvmtiExport::should_post_data_dump()) {
aoqi@0:       JvmtiExport::post_data_dump();
aoqi@0:     }
aoqi@0:   }
aoqi@0:   return JNI_OK;
aoqi@0: }
aoqi@0: 
aoqi@0: // Implementation of "threaddump" command - essentially a remote ctrl-break
aoqi@0: // See also: ThreadDumpDCmd class
aoqi@0: //
aoqi@0: static jint thread_dump(AttachOperation* op, outputStream* out) {
aoqi@0:   bool print_concurrent_locks = false;
aoqi@0:   if (op->arg(0) != NULL && strcmp(op->arg(0), "-l") == 0) {
aoqi@0:     print_concurrent_locks = true;
aoqi@0:   }
aoqi@0: 
aoqi@0:   // thread stacks
aoqi@0:   VM_PrintThreads op1(out, print_concurrent_locks);
aoqi@0:   VMThread::execute(&op1);
aoqi@0: 
aoqi@0:   // JNI global handles
aoqi@0:   VM_PrintJNI op2(out);
aoqi@0:   VMThread::execute(&op2);
aoqi@0: 
aoqi@0:   // Deadlock detection
aoqi@0:   VM_FindDeadlocks op3(out);
aoqi@0:   VMThread::execute(&op3);
aoqi@0: 
aoqi@0:   return JNI_OK;
aoqi@0: }
aoqi@0: 
aoqi@0: // A jcmd attach operation request was received, which will now
aoqi@0: // dispatch to the diagnostic commands used for serviceability functions.
aoqi@0: static jint jcmd(AttachOperation* op, outputStream* out) {
aoqi@0:   Thread* THREAD = Thread::current();
aoqi@0:   // All the supplied jcmd arguments are stored as a single
aoqi@0:   // string (op->arg(0)). This is parsed by the Dcmd framework.
aoqi@0:   DCmd::parse_and_execute(DCmd_Source_AttachAPI, out, op->arg(0), ' ', THREAD);
aoqi@0:   if (HAS_PENDING_EXCEPTION) {
aoqi@0:     java_lang_Throwable::print(PENDING_EXCEPTION, out);
aoqi@0:     out->cr();
aoqi@0:     CLEAR_PENDING_EXCEPTION;
aoqi@0:     // The exception has been printed on the output stream
aoqi@0:     // If the JVM returns JNI_ERR, the attachAPI throws a generic I/O
aoqi@0:     // exception and the content of the output stream is not processed.
aoqi@0:     // By returning JNI_OK, the exception will be displayed on the client side
aoqi@0:   }
aoqi@0:   return JNI_OK;
aoqi@0: }
aoqi@0: 
aoqi@0: // Implementation of "dumpheap" command.
aoqi@0: // See also: HeapDumpDCmd class
aoqi@0: //
aoqi@0: // Input arguments :-
aoqi@0: //   arg0: Name of the dump file
aoqi@0: //   arg1: "-live" or "-all"
aoqi@0: jint dump_heap(AttachOperation* op, outputStream* out) {
aoqi@0:   const char* path = op->arg(0);
aoqi@0:   if (path == NULL || path[0] == '\0') {
aoqi@0:     out->print_cr("No dump file specified");
aoqi@0:   } else {
aoqi@0:     bool live_objects_only = true;   // default is true to retain the behavior before this change is made
aoqi@0:     const char* arg1 = op->arg(1);
aoqi@0:     if (arg1 != NULL && (strlen(arg1) > 0)) {
aoqi@0:       if (strcmp(arg1, "-all") != 0 && strcmp(arg1, "-live") != 0) {
aoqi@0:         out->print_cr("Invalid argument to dumpheap operation: %s", arg1);
aoqi@0:         return JNI_ERR;
aoqi@0:       }
aoqi@0:       live_objects_only = strcmp(arg1, "-live") == 0;
aoqi@0:     }
aoqi@0: 
aoqi@0:     // Request a full GC before heap dump if live_objects_only = true
aoqi@0:     // This helps reduces the amount of unreachable objects in the dump
aoqi@0:     // and makes it easier to browse.
aoqi@0:     HeapDumper dumper(live_objects_only /* request GC */);
aoqi@0:     int res = dumper.dump(op->arg(0));
aoqi@0:     if (res == 0) {
aoqi@0:       out->print_cr("Heap dump file created");
aoqi@0:     } else {
aoqi@0:       // heap dump failed
aoqi@0:       ResourceMark rm;
aoqi@0:       char* error = dumper.error_as_C_string();
aoqi@0:       if (error == NULL) {
aoqi@0:         out->print_cr("Dump failed - reason unknown");
aoqi@0:       } else {
aoqi@0:         out->print_cr("%s", error);
aoqi@0:       }
aoqi@0:     }
aoqi@0:   }
aoqi@0:   return JNI_OK;
aoqi@0: }
aoqi@0: 
aoqi@0: // Implementation of "inspectheap" command
aoqi@0: // See also: ClassHistogramDCmd class
aoqi@0: //
aoqi@0: // Input arguments :-
aoqi@0: //   arg0: "-live" or "-all"
aoqi@0: static jint heap_inspection(AttachOperation* op, outputStream* out) {
aoqi@0:   bool live_objects_only = true;   // default is true to retain the behavior before this change is made
aoqi@0:   const char* arg0 = op->arg(0);
aoqi@0:   if (arg0 != NULL && (strlen(arg0) > 0)) {
aoqi@0:     if (strcmp(arg0, "-all") != 0 && strcmp(arg0, "-live") != 0) {
aoqi@0:       out->print_cr("Invalid argument to inspectheap operation: %s", arg0);
aoqi@0:       return JNI_ERR;
aoqi@0:     }
aoqi@0:     live_objects_only = strcmp(arg0, "-live") == 0;
aoqi@0:   }
aoqi@0:   VM_GC_HeapInspection heapop(out, live_objects_only /* request full gc */);
aoqi@0:   VMThread::execute(&heapop);
aoqi@0:   return JNI_OK;
aoqi@0: }
aoqi@0: 
aoqi@0: // set a boolean global flag using value from AttachOperation
aoqi@0: static jint set_bool_flag(const char* name, AttachOperation* op, outputStream* out) {
aoqi@0:   bool value = true;
aoqi@0:   const char* arg1;
aoqi@0:   if ((arg1 = op->arg(1)) != NULL) {
aoqi@0:     int tmp;
aoqi@0:     int n = sscanf(arg1, "%d", &tmp);
aoqi@0:     if (n != 1) {
aoqi@0:       out->print_cr("flag value must be a boolean (1 or 0)");
aoqi@0:       return JNI_ERR;
aoqi@0:     }
aoqi@0:     value = (tmp != 0);
aoqi@0:   }
aoqi@0:   bool res = CommandLineFlags::boolAtPut((char*)name, &value, Flag::ATTACH_ON_DEMAND);
aoqi@0:   if (! res) {
aoqi@0:     out->print_cr("setting flag %s failed", name);
aoqi@0:   }
aoqi@0:   return res? JNI_OK : JNI_ERR;
aoqi@0: }
aoqi@0: 
aoqi@0: // set a intx global flag using value from AttachOperation
aoqi@0: static jint set_intx_flag(const char* name, AttachOperation* op, outputStream* out) {
aoqi@0:   intx value;
aoqi@0:   const char* arg1;
aoqi@0:   if ((arg1 = op->arg(1)) != NULL) {
aoqi@0:     int n = sscanf(arg1, INTX_FORMAT, &value);
aoqi@0:     if (n != 1) {
aoqi@0:       out->print_cr("flag value must be an integer");
aoqi@0:       return JNI_ERR;
aoqi@0:     }
aoqi@0:   }
aoqi@0:   bool res = CommandLineFlags::intxAtPut((char*)name, &value, Flag::ATTACH_ON_DEMAND);
aoqi@0:   if (! res) {
aoqi@0:     out->print_cr("setting flag %s failed", name);
aoqi@0:   }
aoqi@0: 
aoqi@0:   return res? JNI_OK : JNI_ERR;
aoqi@0: }
aoqi@0: 
aoqi@0: // set a uintx global flag using value from AttachOperation
aoqi@0: static jint set_uintx_flag(const char* name, AttachOperation* op, outputStream* out) {
aoqi@0:   uintx value;
aoqi@0:   const char* arg1;
aoqi@0:   if ((arg1 = op->arg(1)) != NULL) {
aoqi@0:     int n = sscanf(arg1, UINTX_FORMAT, &value);
aoqi@0:     if (n != 1) {
aoqi@0:       out->print_cr("flag value must be an unsigned integer");
aoqi@0:       return JNI_ERR;
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (strncmp(name, "MaxHeapFreeRatio", 17) == 0) {
aoqi@0:     FormatBuffer<80> err_msg("%s", "");
aoqi@0:     if (!Arguments::verify_MaxHeapFreeRatio(err_msg, value)) {
aoqi@0:       out->print_cr("%s", err_msg.buffer());
aoqi@0:       return JNI_ERR;
aoqi@0:     }
aoqi@0:   } else if (strncmp(name, "MinHeapFreeRatio", 17) == 0) {
aoqi@0:     FormatBuffer<80> err_msg("%s", "");
aoqi@0:     if (!Arguments::verify_MinHeapFreeRatio(err_msg, value)) {
aoqi@0:       out->print_cr("%s", err_msg.buffer());
aoqi@0:       return JNI_ERR;
aoqi@0:     }
aoqi@0:   }
aoqi@0:   bool res = CommandLineFlags::uintxAtPut((char*)name, &value, Flag::ATTACH_ON_DEMAND);
aoqi@0:   if (! res) {
aoqi@0:     out->print_cr("setting flag %s failed", name);
aoqi@0:   }
aoqi@0: 
aoqi@0:   return res? JNI_OK : JNI_ERR;
aoqi@0: }
aoqi@0: 
aoqi@0: // set a uint64_t global flag using value from AttachOperation
aoqi@0: static jint set_uint64_t_flag(const char* name, AttachOperation* op, outputStream* out) {
aoqi@0:   uint64_t value;
aoqi@0:   const char* arg1;
aoqi@0:   if ((arg1 = op->arg(1)) != NULL) {
aoqi@0:     int n = sscanf(arg1, UINT64_FORMAT, &value);
aoqi@0:     if (n != 1) {
aoqi@0:       out->print_cr("flag value must be an unsigned 64-bit integer");
aoqi@0:       return JNI_ERR;
aoqi@0:     }
aoqi@0:   }
aoqi@0:   bool res = CommandLineFlags::uint64_tAtPut((char*)name, &value, Flag::ATTACH_ON_DEMAND);
aoqi@0:   if (! res) {
aoqi@0:     out->print_cr("setting flag %s failed", name);
aoqi@0:   }
aoqi@0: 
aoqi@0:   return res? JNI_OK : JNI_ERR;
aoqi@0: }
aoqi@0: 
aoqi@0: // set a string global flag using value from AttachOperation
aoqi@0: static jint set_ccstr_flag(const char* name, AttachOperation* op, outputStream* out) {
aoqi@0:   const char* value;
aoqi@0:   if ((value = op->arg(1)) == NULL) {
aoqi@0:     out->print_cr("flag value must be a string");
aoqi@0:     return JNI_ERR;
aoqi@0:   }
aoqi@0:   bool res = CommandLineFlags::ccstrAtPut((char*)name, &value, Flag::ATTACH_ON_DEMAND);
aoqi@0:   if (res) {
aoqi@0:     FREE_C_HEAP_ARRAY(char, value, mtInternal);
aoqi@0:   } else {
aoqi@0:     out->print_cr("setting flag %s failed", name);
aoqi@0:   }
aoqi@0: 
aoqi@0:   return res? JNI_OK : JNI_ERR;
aoqi@0: }
aoqi@0: 
aoqi@0: // Implementation of "setflag" command
aoqi@0: static jint set_flag(AttachOperation* op, outputStream* out) {
aoqi@0: 
aoqi@0:   const char* name = NULL;
aoqi@0:   if ((name = op->arg(0)) == NULL) {
aoqi@0:     out->print_cr("flag name is missing");
aoqi@0:     return JNI_ERR;
aoqi@0:   }
aoqi@0: 
aoqi@0:   Flag* f = Flag::find_flag((char*)name, strlen(name));
aoqi@0:   if (f && f->is_external() && f->is_writeable()) {
aoqi@0:     if (f->is_bool()) {
aoqi@0:       return set_bool_flag(name, op, out);
aoqi@0:     } else if (f->is_intx()) {
aoqi@0:       return set_intx_flag(name, op, out);
aoqi@0:     } else if (f->is_uintx()) {
aoqi@0:       return set_uintx_flag(name, op, out);
aoqi@0:     } else if (f->is_uint64_t()) {
aoqi@0:       return set_uint64_t_flag(name, op, out);
aoqi@0:     } else if (f->is_ccstr()) {
aoqi@0:       return set_ccstr_flag(name, op, out);
aoqi@0:     } else {
aoqi@0:       ShouldNotReachHere();
aoqi@0:       return JNI_ERR;
aoqi@0:     }
aoqi@0:   } else {
aoqi@0:     return AttachListener::pd_set_flag(op, out);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: // Implementation of "printflag" command
aoqi@0: // See also: PrintVMFlagsDCmd class
aoqi@0: static jint print_flag(AttachOperation* op, outputStream* out) {
aoqi@0:   const char* name = NULL;
aoqi@0:   if ((name = op->arg(0)) == NULL) {
aoqi@0:     out->print_cr("flag name is missing");
aoqi@0:     return JNI_ERR;
aoqi@0:   }
aoqi@0:   Flag* f = Flag::find_flag((char*)name, strlen(name));
aoqi@0:   if (f) {
aoqi@0:     f->print_as_flag(out);
aoqi@0:     out->cr();
aoqi@0:   } else {
aoqi@0:     out->print_cr("no such flag '%s'", name);
aoqi@0:   }
aoqi@0:   return JNI_OK;
aoqi@0: }
aoqi@0: 
aoqi@0: // Table to map operation names to functions.
aoqi@0: 
aoqi@0: // names must be of length <= AttachOperation::name_length_max
aoqi@0: static AttachOperationFunctionInfo funcs[] = {
aoqi@0:   { "agentProperties",  get_agent_properties },
aoqi@0:   { "datadump",         data_dump },
aoqi@0:   { "dumpheap",         dump_heap },
aoqi@0:   { "load",             JvmtiExport::load_agent_library },
aoqi@0:   { "properties",       get_system_properties },
aoqi@0:   { "threaddump",       thread_dump },
aoqi@0:   { "inspectheap",      heap_inspection },
aoqi@0:   { "setflag",          set_flag },
aoqi@0:   { "printflag",        print_flag },
aoqi@0:   { "jcmd",             jcmd },
aoqi@0:   { NULL,               NULL }
aoqi@0: };
aoqi@0: 
aoqi@0: 
aoqi@0: 
aoqi@0: // The Attach Listener threads services a queue. It dequeues an operation
aoqi@0: // from the queue, examines the operation name (command), and dispatches
aoqi@0: // to the corresponding function to perform the operation.
aoqi@0: 
aoqi@0: static void attach_listener_thread_entry(JavaThread* thread, TRAPS) {
aoqi@0:   os::set_priority(thread, NearMaxPriority);
aoqi@0: 
aoqi@0:   thread->record_stack_base_and_size();
aoqi@0: 
aoqi@0:   if (AttachListener::pd_init() != 0) {
aoqi@0:     return;
aoqi@0:   }
aoqi@0:   AttachListener::set_initialized();
aoqi@0: 
aoqi@0:   for (;;) {
aoqi@0:     AttachOperation* op = AttachListener::dequeue();
aoqi@0:     if (op == NULL) {
aoqi@0:       return;   // dequeue failed or shutdown
aoqi@0:     }
aoqi@0: 
aoqi@0:     ResourceMark rm;
aoqi@0:     bufferedStream st;
aoqi@0:     jint res = JNI_OK;
aoqi@0: 
aoqi@0:     // handle special detachall operation
aoqi@0:     if (strcmp(op->name(), AttachOperation::detachall_operation_name()) == 0) {
aoqi@0:       AttachListener::detachall();
aoqi@0:     } else {
aoqi@0:       // find the function to dispatch too
aoqi@0:       AttachOperationFunctionInfo* info = NULL;
aoqi@0:       for (int i=0; funcs[i].name != NULL; i++) {
aoqi@0:         const char* name = funcs[i].name;
aoqi@0:         assert(strlen(name) <= AttachOperation::name_length_max, "operation <= name_length_max");
aoqi@0:         if (strcmp(op->name(), name) == 0) {
aoqi@0:           info = &(funcs[i]);
aoqi@0:           break;
aoqi@0:         }
aoqi@0:       }
aoqi@0: 
aoqi@0:       // check for platform dependent attach operation
aoqi@0:       if (info == NULL) {
aoqi@0:         info = AttachListener::pd_find_operation(op->name());
aoqi@0:       }
aoqi@0: 
aoqi@0:       if (info != NULL) {
aoqi@0:         // dispatch to the function that implements this operation
aoqi@0:         res = (info->func)(op, &st);
aoqi@0:       } else {
aoqi@0:         st.print("Operation %s not recognized!", op->name());
aoqi@0:         res = JNI_ERR;
aoqi@0:       }
aoqi@0:     }
aoqi@0: 
aoqi@0:     // operation complete - send result and output to client
aoqi@0:     op->complete(res, &st);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: // Starts the Attach Listener thread
aoqi@0: void AttachListener::init() {
aoqi@0:   EXCEPTION_MARK;
aoqi@0:   Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK);
aoqi@0:   instanceKlassHandle klass (THREAD, k);
aoqi@0:   instanceHandle thread_oop = klass->allocate_instance_handle(CHECK);
aoqi@0: 
aoqi@0:   const char thread_name[] = "Attach Listener";
aoqi@0:   Handle string = java_lang_String::create_from_str(thread_name, CHECK);
aoqi@0: 
aoqi@0:   // Initialize thread_oop to put it into the system threadGroup
aoqi@0:   Handle thread_group (THREAD, Universe::system_thread_group());
aoqi@0:   JavaValue result(T_VOID);
aoqi@0:   JavaCalls::call_special(&result, thread_oop,
aoqi@0:                        klass,
aoqi@0:                        vmSymbols::object_initializer_name(),
aoqi@0:                        vmSymbols::threadgroup_string_void_signature(),
aoqi@0:                        thread_group,
aoqi@0:                        string,
aoqi@0:                        THREAD);
aoqi@0: 
aoqi@0:   if (HAS_PENDING_EXCEPTION) {
aoqi@0:     tty->print_cr("Exception in VM (AttachListener::init) : ");
aoqi@0:     java_lang_Throwable::print(PENDING_EXCEPTION, tty);
aoqi@0:     tty->cr();
aoqi@0: 
aoqi@0:     CLEAR_PENDING_EXCEPTION;
aoqi@0: 
aoqi@0:     return;
aoqi@0:   }
aoqi@0: 
aoqi@0:   KlassHandle group(THREAD, SystemDictionary::ThreadGroup_klass());
aoqi@0:   JavaCalls::call_special(&result,
aoqi@0:                         thread_group,
aoqi@0:                         group,
aoqi@0:                         vmSymbols::add_method_name(),
aoqi@0:                         vmSymbols::thread_void_signature(),
aoqi@0:                         thread_oop,             // ARG 1
aoqi@0:                         THREAD);
aoqi@0: 
aoqi@0:   if (HAS_PENDING_EXCEPTION) {
aoqi@0:     tty->print_cr("Exception in VM (AttachListener::init) : ");
aoqi@0:     java_lang_Throwable::print(PENDING_EXCEPTION, tty);
aoqi@0:     tty->cr();
aoqi@0: 
aoqi@0:     CLEAR_PENDING_EXCEPTION;
aoqi@0: 
aoqi@0:     return;
aoqi@0:   }
aoqi@0: 
aoqi@0:   { MutexLocker mu(Threads_lock);
aoqi@0:     JavaThread* listener_thread = new JavaThread(&attach_listener_thread_entry);
aoqi@0: 
aoqi@0:     // Check that thread and osthread were created
aoqi@0:     if (listener_thread == NULL || listener_thread->osthread() == NULL) {
aoqi@0:       vm_exit_during_initialization("java.lang.OutOfMemoryError",
aoqi@0:                                     "unable to create new native thread");
aoqi@0:     }
aoqi@0: 
aoqi@0:     java_lang_Thread::set_thread(thread_oop(), listener_thread);
aoqi@0:     java_lang_Thread::set_daemon(thread_oop());
aoqi@0: 
aoqi@0:     listener_thread->set_threadObj(thread_oop());
aoqi@0:     Threads::add(listener_thread);
aoqi@0:     Thread::start(listener_thread);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: // Performs clean-up tasks on platforms where we can detect that the last
aoqi@0: // client has detached
aoqi@0: void AttachListener::detachall() {
aoqi@0:   // call the platform dependent clean-up
aoqi@0:   pd_detachall();
aoqi@0: }