494
495 // Check that there are no old or obsolete methods
496 class CheckClass : public KlassClosure {
497 Thread* _thread;
498 public:
499 CheckClass(Thread* t) : _thread(t) {}
500 void do_klass(Klass* k);
501 };
502
503 // Unevolving classes may point to methods of the_class directly
504 // from their constant pool caches, itables, and/or vtables. We
505 // use the ClassLoaderDataGraph::classes_do() facility and this helper
506 // to fix up these pointers.
507 class AdjustCpoolCacheAndVtable : public KlassClosure {
508 Thread* _thread;
509 public:
510 AdjustCpoolCacheAndVtable(Thread* t) : _thread(t) {}
511 void do_klass(Klass* k);
512 };
513
514 public:
515 VM_RedefineClasses(jint class_count,
516 const jvmtiClassDefinition *class_defs,
517 JvmtiClassLoadKind class_load_kind);
518 VMOp_Type type() const { return VMOp_RedefineClasses; }
519 bool doit_prologue();
520 void doit();
521 void doit_epilogue();
522
523 bool allow_nested_vm_operations() const { return true; }
524 jvmtiError check_error() { return _res; }
525
526 // Modifiable test must be shared between IsModifiableClass query
527 // and redefine implementation
528 static bool is_modifiable_class(oop klass_mirror);
529
530 static jint get_cached_class_file_len(JvmtiCachedClassFileData *cache) {
531 return cache == NULL ? 0 : cache->length;
532 }
533 static unsigned char * get_cached_class_file_bytes(JvmtiCachedClassFileData *cache) {
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494
495 // Check that there are no old or obsolete methods
496 class CheckClass : public KlassClosure {
497 Thread* _thread;
498 public:
499 CheckClass(Thread* t) : _thread(t) {}
500 void do_klass(Klass* k);
501 };
502
503 // Unevolving classes may point to methods of the_class directly
504 // from their constant pool caches, itables, and/or vtables. We
505 // use the ClassLoaderDataGraph::classes_do() facility and this helper
506 // to fix up these pointers.
507 class AdjustCpoolCacheAndVtable : public KlassClosure {
508 Thread* _thread;
509 public:
510 AdjustCpoolCacheAndVtable(Thread* t) : _thread(t) {}
511 void do_klass(Klass* k);
512 };
513
514 // Clean MethodData out
515 class MethodDataCleaner : public KlassClosure {
516 public:
517 MethodDataCleaner() {}
518 void do_klass(Klass* k);
519 };
520 public:
521 VM_RedefineClasses(jint class_count,
522 const jvmtiClassDefinition *class_defs,
523 JvmtiClassLoadKind class_load_kind);
524 VMOp_Type type() const { return VMOp_RedefineClasses; }
525 bool doit_prologue();
526 void doit();
527 void doit_epilogue();
528
529 bool allow_nested_vm_operations() const { return true; }
530 jvmtiError check_error() { return _res; }
531
532 // Modifiable test must be shared between IsModifiableClass query
533 // and redefine implementation
534 static bool is_modifiable_class(oop klass_mirror);
535
536 static jint get_cached_class_file_len(JvmtiCachedClassFileData *cache) {
537 return cache == NULL ? 0 : cache->length;
538 }
539 static unsigned char * get_cached_class_file_bytes(JvmtiCachedClassFileData *cache) {
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