jdk8-mips64-public/hotspot: src/share/vm/prims/jvmtiEnvBase.hpp@2f716c0acb64 (annotated)

src/share/vm/prims/jvmtiEnvBase.hpp@2f716c0acb64 (annotated)

src/share/vm/prims/jvmtiEnvBase.hpp

Mon, 02 Mar 2009 14:05:07 -0700

author: dcubed
date: Mon, 02 Mar 2009 14:05:07 -0700
changeset 1046: 2f716c0acb64
parent 435: a61af66fc99e
child 1557: dcb15a6f342d
permissions: -rw-r--r--

6567360: 3/4 SIGBUS in jvmti RawMonitor magic check for unaligned bad monitor pointer
Summary: Change JvmtiEnvBase::is_valid() and JvmtiRawMonitor::is_valid() to fetch the _magic fields via Bytes::get_native_u[248]().
Reviewed-by: coleenp, swamyv

 /*
  * Copyright 2003-2006 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  *
  */
 #ifndef _JAVA_JVMTIENVBASE_H_
 #define _JAVA_JVMTIENVBASE_H_
 //
 // Forward Declarations
 //
 class JvmtiEnv;
 class JvmtiThreadState;
 class JvmtiRawMonitor; // for jvmtiEnv.hpp
 class JvmtiEventControllerPrivate;
 class JvmtiTagMap;
 // One JvmtiEnv object is created per jvmti attachment;
 // done via JNI GetEnv() call. Multiple attachments are
 // allowed in jvmti.
 class JvmtiEnvBase : public CHeapObj {
  private:
   static JvmtiEnvBase*     _head_environment;  // head of environment list
   static bool              _globally_initialized;
   static jvmtiPhase        _phase;
   static volatile int      _dying_thread_env_iteration_count;
  public:
   enum {
     JDK15_JVMTI_VERSION = JVMTI_VERSION_1_0 +  33,  /* version: 1.0.33  */
     JDK16_JVMTI_VERSION = JVMTI_VERSION_1_1 + 102   /* version: 1.1.102 */
   };
   static jvmtiPhase  get_phase()                    { return _phase; }
   static void  set_phase(jvmtiPhase phase)          { _phase = phase; }
   static bool is_vm_live()                          { return _phase == JVMTI_PHASE_LIVE; }
   static void entering_dying_thread_env_iteration() { ++_dying_thread_env_iteration_count; }
   static void leaving_dying_thread_env_iteration()  { --_dying_thread_env_iteration_count; }
   static bool is_inside_dying_thread_env_iteration(){ return _dying_thread_env_iteration_count > 0; }
  private:
   enum {
       JVMTI_MAGIC    = 0x71EE,
       DISPOSED_MAGIC = 0xDEFC,
       BAD_MAGIC      = 0xDEAD
   };
   jvmtiEnv _jvmti_external;
   jint _magic;
   JvmtiEnvBase* _next;
   bool _is_retransformable;
   const void *_env_local_storage;     // per env agent allocated data.
   jvmtiEventCallbacks _event_callbacks;
   jvmtiExtEventCallbacks _ext_event_callbacks;
   JvmtiTagMap* _tag_map;
   JvmtiEnvEventEnable _env_event_enable;
   jvmtiCapabilities _current_capabilities;
   jvmtiCapabilities _prohibited_capabilities;
   volatile bool _class_file_load_hook_ever_enabled;
   static volatile bool _needs_clean_up;
   char** _native_method_prefixes;
   int    _native_method_prefix_count;
  protected:
   JvmtiEnvBase();
   ~JvmtiEnvBase();
   void dispose();
   void env_dispose();
   void set_env_local_storage(const void* data)     { _env_local_storage = data; }
   const void* get_env_local_storage()              { return _env_local_storage; }
   void record_class_file_load_hook_enabled();
   void record_first_time_class_file_load_hook_enabled();
   char** get_native_method_prefixes()              { return _native_method_prefixes; }
   int    get_native_method_prefix_count()          { return _native_method_prefix_count; }
   jvmtiError set_native_method_prefixes(jint prefix_count, char** prefixes);
  private:
   friend class JvmtiEventControllerPrivate;
   void initialize();
   void set_event_callbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks);
   static void globally_initialize();
   static void periodic_clean_up();
   friend class JvmtiEnvIterator;
   JvmtiEnv* next_environment()                     { return (JvmtiEnv*)_next; }
   void set_next_environment(JvmtiEnvBase* env)     { _next = env; }
   static JvmtiEnv* head_environment()              { return (JvmtiEnv*)_head_environment; }
  public:
   bool is_valid();
   bool is_retransformable()                        { return _is_retransformable; }
   static ByteSize jvmti_external_offset() {
     return byte_offset_of(JvmtiEnvBase, _jvmti_external);
   };
   static JvmtiEnv* JvmtiEnv_from_jvmti_env(jvmtiEnv *env) {
     return (JvmtiEnv*)((intptr_t)env - in_bytes(jvmti_external_offset()));
   };
   jvmtiCapabilities *get_capabilities()             { return &_current_capabilities; }
   jvmtiCapabilities *get_prohibited_capabilities()  { return &_prohibited_capabilities; }
   static char** get_all_native_method_prefixes(int* count_ptr);
   // This test will answer true when all environments have been disposed and some have
   // not yet been deallocated.  As a result, this test should only be used as an
   // optimization for the no environment case.
   static bool environments_might_exist() {
     return head_environment() != NULL;
   }
   static void check_for_periodic_clean_up();
   JvmtiEnvEventEnable *env_event_enable() {
     return &_env_event_enable;
   }
   jvmtiError allocate(jlong size, unsigned char** mem_ptr) {
     if (size < 0) {
       return JVMTI_ERROR_ILLEGAL_ARGUMENT;
     }
     if (size == 0) {
       *mem_ptr = NULL;
     } else {
       *mem_ptr = (unsigned char *)os::malloc((size_t)size);
       if (*mem_ptr == NULL) {
         return JVMTI_ERROR_OUT_OF_MEMORY;
       }
     }
     return JVMTI_ERROR_NONE;
   }
   jvmtiError deallocate(unsigned char* mem) {
     if (mem != NULL) {
       os::free(mem);
     }
     return JVMTI_ERROR_NONE;
   }
   // Memory functions
   unsigned char* jvmtiMalloc(jlong size);  // don't use this - call allocate
   // method to create a local handle
   jobject jni_reference(Handle hndl) {
     return JNIHandles::make_local(hndl());
   }
   // method to create a local handle.
   // This function allows caller to specify which
   // threads local handle table to use.
   jobject jni_reference(JavaThread *thread, Handle hndl) {
     return JNIHandles::make_local(thread, hndl());
   }
   // method to destroy a local handle
   void destroy_jni_reference(jobject jobj) {
     JNIHandles::destroy_local(jobj);
   }
   // method to destroy a local handle.
   // This function allows caller to specify which
   // threads local handle table to use although currently it is
   // not used.
   void destroy_jni_reference(JavaThread *thread, jobject jobj) {
     destroy_jni_reference(jobj);
   }
   jvmtiEnv* jvmti_external() { return &_jvmti_external; };
 // Event Dispatch
   bool has_callback(jvmtiEvent event_type) {
     assert(event_type >= JVMTI_MIN_EVENT_TYPE_VAL &&
            event_type <= JVMTI_MAX_EVENT_TYPE_VAL, "checking");
     return ((void**)&_event_callbacks)[event_type-JVMTI_MIN_EVENT_TYPE_VAL] != NULL;
   }
   jvmtiEventCallbacks* callbacks() {
     return &_event_callbacks;
   }
   jvmtiExtEventCallbacks* ext_callbacks() {
     return &_ext_event_callbacks;
   }
   void set_tag_map(JvmtiTagMap* tag_map) {
     _tag_map = tag_map;
   }
   JvmtiTagMap* tag_map() {
     return _tag_map;
   }
   // return true if event is enabled globally or for any thread
   // True only if there is a callback for it.
   bool is_enabled(jvmtiEvent event_type) {
     return _env_event_enable.is_enabled(event_type);
   }
 // Random Utilities
  protected:
   // helper methods for creating arrays of global JNI Handles from local Handles
   // allocated into environment specific storage
   jobject * new_jobjectArray(int length, Handle *handles);
   jthread * new_jthreadArray(int length, Handle *handles);
   jthreadGroup * new_jthreadGroupArray(int length, Handle *handles);
   // convert from JNIHandle to JavaThread *
   JavaThread  * get_JavaThread(jthread jni_thread);
   // convert to a jni jclass from a non-null klassOop
   jclass get_jni_class_non_null(klassOop k);
   void update_klass_field_access_flag(fieldDescriptor *fd);
   jint count_locked_objects(JavaThread *java_thread, Handle hobj);
   jvmtiError get_locked_objects_in_frame(JavaThread *calling_thread,
                                    JavaThread* java_thread,
                                    javaVFrame *jvf,
                                    GrowableArray<jvmtiMonitorStackDepthInfo*>* owned_monitors_list,
                                    jint depth);
   vframe* vframeFor(JavaThread* java_thread, jint depth);
  public:
   // get a field descriptor for the specified class and field
   static bool get_field_descriptor(klassOop k, jfieldID field, fieldDescriptor* fd);
   // test for suspend - most (all?) of these should go away
   static bool is_thread_fully_suspended(JavaThread *thread,
                                         bool wait_for_suspend,
                                         uint32_t *bits);
   // JVMTI API helper functions which are called at safepoint or thread is suspended.
   jvmtiError get_frame_count(JvmtiThreadState *state, jint *count_ptr);
   jvmtiError get_frame_location(JavaThread* java_thread, jint depth,
                                               jmethodID* method_ptr, jlocation* location_ptr);
   jvmtiError get_object_monitor_usage(JavaThread *calling_thread,
                                                     jobject object, jvmtiMonitorUsage* info_ptr);
   jvmtiError get_stack_trace(JavaThread *java_thread,
                                            jint stack_depth, jint max_count,
                                            jvmtiFrameInfo* frame_buffer, jint* count_ptr);
   jvmtiError get_current_contended_monitor(JavaThread *calling_thread,
                                                          JavaThread *java_thread,
                                                          jobject *monitor_ptr);
   jvmtiError get_owned_monitors(JavaThread *calling_thread, JavaThread* java_thread,
                           GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list);
   jvmtiError check_top_frame(JavaThread* current_thread, JavaThread* java_thread,
                              jvalue value, TosState tos, Handle* ret_ob_h);
   jvmtiError force_early_return(JavaThread* java_thread, jvalue value, TosState tos);
 };
 // This class is the only safe means of iterating through environments.
 // Note that this iteratation includes invalid environments pending
 // deallocation -- in fact, some uses depend on this behavior.
 class JvmtiEnvIterator : public StackObj {
  private:
   bool _entry_was_marked;
  public:
   JvmtiEnvIterator() {
     if (Threads::number_of_threads() == 0) {
       _entry_was_marked = false; // we are single-threaded, no need
     } else {
       Thread::current()->entering_jvmti_env_iteration();
       _entry_was_marked = true;
     }
   }
   ~JvmtiEnvIterator() {
     if (_entry_was_marked) {
       Thread::current()->leaving_jvmti_env_iteration();
     }
   }
   JvmtiEnv* first()                 { return JvmtiEnvBase::head_environment(); }
   JvmtiEnv* next(JvmtiEnvBase* env) { return env->next_environment(); }
 };
 // VM operation to get monitor information with stack depth.
 class VM_GetOwnedMonitorInfo : public VM_Operation {
 private:
   JvmtiEnv *_env;
   JavaThread* _calling_thread;
   JavaThread *_java_thread;
   jvmtiError _result;
   GrowableArray<jvmtiMonitorStackDepthInfo*> *_owned_monitors_list;
 public:
   VM_GetOwnedMonitorInfo(JvmtiEnv* env, JavaThread* calling_thread,
                                    JavaThread* java_thread,
                                    GrowableArray<jvmtiMonitorStackDepthInfo*>* owned_monitor_list) {
     _env = env;
     _calling_thread = calling_thread;
     _java_thread = java_thread;
     _owned_monitors_list = owned_monitor_list;
     _result = JVMTI_ERROR_NONE;
   }
   VMOp_Type type() const { return VMOp_GetOwnedMonitorInfo; }
   void doit() {
     ((JvmtiEnvBase *)_env)->get_owned_monitors(_calling_thread, _java_thread,
                                                          _owned_monitors_list);
   }
   jvmtiError result() { return _result; }
 };
 // VM operation to get object monitor usage.
 class VM_GetObjectMonitorUsage : public VM_Operation {
 private:
   JvmtiEnv *_env;
   jobject _object;
   JavaThread* _calling_thread;
   jvmtiMonitorUsage* _info_ptr;
   jvmtiError _result;
 public:
   VM_GetObjectMonitorUsage(JvmtiEnv *env, JavaThread* calling_thread, jobject object, jvmtiMonitorUsage* info_ptr) {
     _env = env;
     _object = object;
     _calling_thread = calling_thread;
     _info_ptr = info_ptr;
   }
   VMOp_Type type() const { return VMOp_GetObjectMonitorUsage; }
   jvmtiError result() { return _result; }
   void doit() {
     _result = ((JvmtiEnvBase*) _env)->get_object_monitor_usage(_calling_thread, _object, _info_ptr);
   }
 };
 // VM operation to get current contended monitor.
 class VM_GetCurrentContendedMonitor : public VM_Operation {
 private:
   JvmtiEnv *_env;
   JavaThread *_calling_thread;
   JavaThread *_java_thread;
   jobject *_owned_monitor_ptr;
   jvmtiError _result;
 public:
   VM_GetCurrentContendedMonitor(JvmtiEnv *env, JavaThread *calling_thread, JavaThread *java_thread, jobject *mon_ptr) {
     _env = env;
     _calling_thread = calling_thread;
     _java_thread = java_thread;
     _owned_monitor_ptr = mon_ptr;
   }
   VMOp_Type type() const { return VMOp_GetCurrentContendedMonitor; }
   jvmtiError result() { return _result; }
   void doit() {
     _result = ((JvmtiEnvBase *)_env)->get_current_contended_monitor(_calling_thread,_java_thread,_owned_monitor_ptr);
   }
 };
 // VM operation to get stack trace at safepoint.
 class VM_GetStackTrace : public VM_Operation {
 private:
   JvmtiEnv *_env;
   JavaThread *_java_thread;
   jint _start_depth;
   jint _max_count;
   jvmtiFrameInfo *_frame_buffer;
   jint *_count_ptr;
   jvmtiError _result;
 public:
   VM_GetStackTrace(JvmtiEnv *env, JavaThread *java_thread,
                    jint start_depth, jint max_count,
                    jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
     _env = env;
     _java_thread = java_thread;
     _start_depth = start_depth;
     _max_count = max_count;
     _frame_buffer = frame_buffer;
     _count_ptr = count_ptr;
   }
   jvmtiError result() { return _result; }
   VMOp_Type type() const { return VMOp_GetStackTrace; }
   void doit() {
     _result = ((JvmtiEnvBase *)_env)->get_stack_trace(_java_thread,
                                                       _start_depth, _max_count,
                                                       _frame_buffer, _count_ptr);
   }
 };
 // forward declaration
 struct StackInfoNode;
 // VM operation to get stack trace at safepoint.
 class VM_GetMultipleStackTraces : public VM_Operation {
 private:
   JvmtiEnv *_env;
   jint _max_frame_count;
   jvmtiStackInfo *_stack_info;
   jvmtiError _result;
   int _frame_count_total;
   struct StackInfoNode *_head;
   JvmtiEnvBase *env()                 { return (JvmtiEnvBase *)_env; }
   jint max_frame_count()              { return _max_frame_count; }
   struct StackInfoNode *head()        { return _head; }
   void set_head(StackInfoNode *head)  { _head = head; }
 protected:
   void set_result(jvmtiError result)  { _result = result; }
   void fill_frames(jthread jt, JavaThread *thr, oop thread_oop);
   void allocate_and_fill_stacks(jint thread_count);
 public:
   VM_GetMultipleStackTraces(JvmtiEnv *env, jint max_frame_count) {
     _env = env;
     _max_frame_count = max_frame_count;
     _frame_count_total = 0;
     _head = NULL;
     _result = JVMTI_ERROR_NONE;
   }
   VMOp_Type type() const             { return VMOp_GetMultipleStackTraces; }
   jvmtiStackInfo *stack_info()       { return _stack_info; }
   jvmtiError result()                { return _result; }
 };
 // VM operation to get stack trace at safepoint.
 class VM_GetAllStackTraces : public VM_GetMultipleStackTraces {
 private:
   JavaThread *_calling_thread;
   jint _final_thread_count;
 public:
   VM_GetAllStackTraces(JvmtiEnv *env, JavaThread *calling_thread,
                        jint max_frame_count)
       : VM_GetMultipleStackTraces(env, max_frame_count) {
     _calling_thread = calling_thread;
   }
   VMOp_Type type() const          { return VMOp_GetAllStackTraces; }
   void doit();
   jint final_thread_count()       { return _final_thread_count; }
 };
 // VM operation to get stack trace at safepoint.
 class VM_GetThreadListStackTraces : public VM_GetMultipleStackTraces {
 private:
   jint _thread_count;
   const jthread* _thread_list;
 public:
   VM_GetThreadListStackTraces(JvmtiEnv *env, jint thread_count, const jthread* thread_list, jint max_frame_count)
       : VM_GetMultipleStackTraces(env, max_frame_count) {
     _thread_count = thread_count;
     _thread_list = thread_list;
   }
   VMOp_Type type() const { return VMOp_GetThreadListStackTraces; }
   void doit();
 };
 // VM operation to count stack frames at safepoint.
 class VM_GetFrameCount : public VM_Operation {
 private:
   JvmtiEnv *_env;
   JvmtiThreadState *_state;
   jint *_count_ptr;
   jvmtiError _result;
 public:
   VM_GetFrameCount(JvmtiEnv *env, JvmtiThreadState *state, jint *count_ptr) {
     _env = env;
     _state = state;
     _count_ptr = count_ptr;
   }
   VMOp_Type type() const { return VMOp_GetFrameCount; }
   jvmtiError result()    { return _result; }
   void doit() {
     _result = ((JvmtiEnvBase*)_env)->get_frame_count(_state, _count_ptr);
   }
 };
 // VM operation to frame location at safepoint.
 class VM_GetFrameLocation : public VM_Operation {
 private:
   JvmtiEnv *_env;
   JavaThread* _java_thread;
   jint _depth;
   jmethodID* _method_ptr;
   jlocation* _location_ptr;
   jvmtiError _result;
 public:
   VM_GetFrameLocation(JvmtiEnv *env, JavaThread* java_thread, jint depth,
                       jmethodID* method_ptr, jlocation* location_ptr) {
     _env = env;
     _java_thread = java_thread;
     _depth = depth;
     _method_ptr = method_ptr;
     _location_ptr = location_ptr;
   }
   VMOp_Type type() const { return VMOp_GetFrameLocation; }
   jvmtiError result()    { return _result; }
   void doit() {
     _result = ((JvmtiEnvBase*)_env)->get_frame_location(_java_thread, _depth,
                                                         _method_ptr, _location_ptr);
   }
 };
 // ResourceTracker
 //
 // ResourceTracker works a little like a ResourceMark. All allocates
 // using the resource tracker are recorded. If an allocate using the
 // resource tracker fails the destructor will free any resources
 // that were allocated using the tracker.
 // The motive for this class is to avoid messy error recovery code
 // in situations where multiple allocations are done in sequence. If
 // the second or subsequent allocation fails it avoids any code to
 // release memory allocated in the previous calls.
 //
 // Usage :-
 //   ResourceTracker rt(env);
 //   :
 //   err = rt.allocate(1024, &ptr);
 class ResourceTracker : public StackObj {
  private:
   JvmtiEnv* _env;
   GrowableArray<unsigned char*> *_allocations;
   bool _failed;
  public:
   ResourceTracker(JvmtiEnv* env);
   ~ResourceTracker();
   jvmtiError allocate(jlong size, unsigned char** mem_ptr);
   unsigned char* allocate(jlong size);
   char* strdup(const char* str);
 };
 // Jvmti monitor closure to collect off stack monitors.
 class JvmtiMonitorClosure: public MonitorClosure {
  private:
   JavaThread *_java_thread;
   JavaThread *_calling_thread;
   GrowableArray<jvmtiMonitorStackDepthInfo*> *_owned_monitors_list;
   jvmtiError _error;
   JvmtiEnvBase *_env;
  public:
   JvmtiMonitorClosure(JavaThread* thread, JavaThread *calling_thread,
                       GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors,
                       JvmtiEnvBase *env) {
     _java_thread = thread;
     _calling_thread = calling_thread;
     _owned_monitors_list = owned_monitors;
     _error = JVMTI_ERROR_NONE;
     _env = env;
   }
   void do_monitor(ObjectMonitor* mon);
   jvmtiError error() { return _error;}
 };
 #endif   /* _JAVA_JVMTIENVBASE_H_ */

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/prims/jvmtiEnvBase.hpp@2f716c0acb64 (annotated)

src/share/vm/prims/jvmtiEnvBase.hpp