--- old/src/share/vm/classfile/defaultMethods.cpp Fri Feb 20 13:13:29 2015 +++ new/src/share/vm/classfile/defaultMethods.cpp Fri Feb 20 13:13:28 2015 @@ -1091,6 +1091,7 @@ } // update idnum for new location merged_methods->at(i)->set_method_idnum(i); + merged_methods->at(i)->set_orig_method_idnum(i); } // Verify correct order --- old/src/share/vm/oops/constMethod.hpp Fri Feb 20 13:13:30 2015 +++ new/src/share/vm/oops/constMethod.hpp Fri Feb 20 13:13:30 2015 @@ -215,6 +215,7 @@ u2 _max_stack; // Maximum number of entries on the expression stack u2 _max_locals; // Number of local variables used by this method u2 _size_of_parameters; // size of the parameter block (receiver + arguments) in words + u2 _orig_method_idnum; // Original unique identification number for the method // Constructor ConstMethod(int byte_code_size, @@ -473,6 +474,9 @@ u2 method_idnum() const { return _method_idnum; } void set_method_idnum(u2 idnum) { _method_idnum = idnum; } + u2 orig_method_idnum() const { return _orig_method_idnum; } + void set_orig_method_idnum(u2 idnum) { _orig_method_idnum = idnum; } + // max stack int max_stack() const { return _max_stack; } void set_max_stack(int size) { _max_stack = size; } --- old/src/share/vm/oops/cpCache.cpp Fri Feb 20 13:13:32 2015 +++ new/src/share/vm/oops/cpCache.cpp Fri Feb 20 13:13:31 2015 @@ -1,5 +1,5 @@ /* - * Copyright (c) 1998, 2014, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 1998, 2015, 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 @@ -455,7 +455,6 @@ new_method->name()->as_C_string(), new_method->signature()->as_C_string())); } - return true; } @@ -483,7 +482,6 @@ new_method->name()->as_C_string(), new_method->signature()->as_C_string())); } - return true; } @@ -510,12 +508,11 @@ (!f1_as_method()->is_old() && !f1_as_method()->is_obsolete()))); } -bool ConstantPoolCacheEntry::is_interesting_method_entry(Klass* k) { +Method* ConstantPoolCacheEntry::get_interesting_method_entry(Klass* k) { if (!is_method_entry()) { // not a method entry so not interesting by default - return false; + return NULL; } - Method* m = NULL; if (is_vfinal()) { // virtual and final so _f2 contains method ptr instead of vtable index @@ -522,24 +519,22 @@ m = f2_as_vfinal_method(); } else if (is_f1_null()) { // NULL _f1 means this is a virtual entry so also not interesting - return false; + return NULL; } else { if (!(_f1->is_method())) { // _f1 can also contain a Klass* for an interface - return false; + return NULL; } m = f1_as_method(); } - assert(m != NULL && m->is_method(), "sanity check"); if (m == NULL || !m->is_method() || (k != NULL && m->method_holder() != k)) { // robustness for above sanity checks or method is not in // the interesting class - return false; + return NULL; } - // the method is in the interesting class so the entry is interesting - return true; + return m; } #endif // INCLUDE_JVMTI @@ -616,7 +611,7 @@ // If any entry of this ConstantPoolCache points to any of // old_methods, replace it with the corresponding new_method. void ConstantPoolCache::adjust_method_entries(Method** old_methods, Method** new_methods, - int methods_length, bool * trace_name_printed) { + int methods_length, bool * trace_name_printed) { if (methods_length == 0) { // nothing to do if there are no methods @@ -627,7 +622,7 @@ Klass* old_holder = old_methods[0]->method_holder(); for (int i = 0; i < length(); i++) { - if (!entry_at(i)->is_interesting_method_entry(old_holder)) { + if (entry_at(i)->get_interesting_method_entry(old_holder) == NULL) { // skip uninteresting methods continue; } @@ -651,10 +646,33 @@ } } +// If any entry of this ConstantPoolCache points to any of +// old_methods, replace it with the corresponding new_method. +void ConstantPoolCache::adjust_method_entries(InstanceKlass* holder, bool * trace_name_printed) { + for (int i = 0; i < length(); i++) { + ConstantPoolCacheEntry* entry = entry_at(i); + Method* old_method = entry->get_interesting_method_entry(holder); + if (old_method == NULL || !old_method->is_old()) { + continue; // skip uninteresting entries + } + if (old_method->is_deleted()) { + // clean up entries with deleted methods + entry->initialize_entry(entry->constant_pool_index()); + continue; + } + Method* new_method = holder->method_with_idnum(old_method->orig_method_idnum()); + + assert(new_method != NULL, "method_with_idnum() should not be NULL"); + assert(old_method != new_method, "sanity check"); + + entry_at(i)->adjust_method_entry(old_method, new_method, trace_name_printed); + } +} + // the constant pool cache should never contain old or obsolete methods bool ConstantPoolCache::check_no_old_or_obsolete_entries() { for (int i = 1; i < length(); i++) { - if (entry_at(i)->is_interesting_method_entry(NULL) && + if (entry_at(i)->get_interesting_method_entry(NULL) != NULL && !entry_at(i)->check_no_old_or_obsolete_entries()) { return false; } @@ -664,7 +682,7 @@ void ConstantPoolCache::dump_cache() { for (int i = 1; i < length(); i++) { - if (entry_at(i)->is_interesting_method_entry(NULL)) { + if (entry_at(i)->get_interesting_method_entry(NULL) != NULL) { entry_at(i)->print(tty, i); } } --- old/src/share/vm/oops/cpCache.hpp Fri Feb 20 13:13:33 2015 +++ new/src/share/vm/oops/cpCache.hpp Fri Feb 20 13:13:33 2015 @@ -1,5 +1,5 @@ /* - * Copyright (c) 1998, 2014, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 1998, 2015, 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 @@ -381,7 +381,7 @@ bool adjust_method_entry(Method* old_method, Method* new_method, bool * trace_name_printed); bool check_no_old_or_obsolete_entries(); - bool is_interesting_method_entry(Klass* k); + Method* get_interesting_method_entry(Klass* k); #endif // INCLUDE_JVMTI // Debugging & Printing @@ -479,6 +479,7 @@ // group don't print the klass name. void adjust_method_entries(Method** old_methods, Method** new_methods, int methods_length, bool * trace_name_printed); + void adjust_method_entries(InstanceKlass* holder, bool * trace_name_printed); bool check_no_old_or_obsolete_entries(); void dump_cache(); #endif // INCLUDE_JVMTI --- old/src/share/vm/oops/instanceKlass.cpp Fri Feb 20 13:13:35 2015 +++ new/src/share/vm/oops/instanceKlass.cpp Fri Feb 20 13:13:35 2015 @@ -2793,30 +2793,33 @@ // not yet in the vtable due to concurrent subclass define and superinterface // redefinition // Note: those in the vtable, should have been updated via adjust_method_entries -void InstanceKlass::adjust_default_methods(Method** old_methods, Method** new_methods, - int methods_length, bool* trace_name_printed) { +void InstanceKlass::adjust_default_methods(InstanceKlass* holder, bool* trace_name_printed) { // search the default_methods for uses of either obsolete or EMCP methods if (default_methods() != NULL) { - for (int j = 0; j < methods_length; j++) { - Method* old_method = old_methods[j]; - Method* new_method = new_methods[j]; + for (int index = 0; index < default_methods()->length(); index ++) { + Method* old_method = default_methods()->at(index); + if (old_method == NULL || old_method->method_holder() != holder || !old_method->is_old()) { + continue; // skip uninteresting entries + } + assert(!old_method->is_deleted(), "default methods may not be deleted"); - for (int index = 0; index < default_methods()->length(); index ++) { - if (default_methods()->at(index) == old_method) { - default_methods()->at_put(index, new_method); - if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) { - if (!(*trace_name_printed)) { - // RC_TRACE_MESG macro has an embedded ResourceMark - RC_TRACE_MESG(("adjust: klassname=%s default methods from name=%s", - external_name(), - old_method->method_holder()->external_name())); - *trace_name_printed = true; - } - RC_TRACE(0x00100000, ("default method update: %s(%s) ", - new_method->name()->as_C_string(), - new_method->signature()->as_C_string())); - } + Method* new_method = holder->method_with_idnum(old_method->orig_method_idnum()); + + assert(new_method != NULL, "method_with_idnum() should not be NULL"); + assert(old_method != new_method, "sanity check"); + + default_methods()->at_put(index, new_method); + if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) { + if (!(*trace_name_printed)) { + // RC_TRACE_MESG macro has an embedded ResourceMark + RC_TRACE_MESG(("adjust: klassname=%s default methods from name=%s", + external_name(), + old_method->method_holder()->external_name())); + *trace_name_printed = true; } + RC_TRACE(0x00100000, ("default method update: %s(%s) ", + new_method->name()->as_C_string(), + new_method->signature()->as_C_string())); } } } --- old/src/share/vm/oops/instanceKlass.hpp Fri Feb 20 13:13:36 2015 +++ new/src/share/vm/oops/instanceKlass.hpp Fri Feb 20 13:13:36 2015 @@ -937,8 +937,7 @@ Method* method_at_itable(Klass* holder, int index, TRAPS); #if INCLUDE_JVMTI - void adjust_default_methods(Method** old_methods, Method** new_methods, - int methods_length, bool* trace_name_printed); + void adjust_default_methods(InstanceKlass* holder, bool* trace_name_printed); #endif // INCLUDE_JVMTI // Garbage collection --- old/src/share/vm/oops/klassVtable.cpp Fri Feb 20 13:13:38 2015 +++ new/src/share/vm/oops/klassVtable.cpp Fri Feb 20 13:13:38 2015 @@ -864,44 +864,43 @@ } return updated; } -void klassVtable::adjust_method_entries(Method** old_methods, Method** new_methods, - int methods_length, bool * trace_name_printed) { - // search the vtable for uses of either obsolete or EMCP methods - for (int j = 0; j < methods_length; j++) { - Method* old_method = old_methods[j]; - Method* new_method = new_methods[j]; - // In the vast majority of cases we could get the vtable index - // by using: old_method->vtable_index() - // However, there are rare cases, eg. sun.awt.X11.XDecoratedPeer.getX() - // in sun.awt.X11.XFramePeer where methods occur more than once in the - // vtable, so, alas, we must do an exhaustive search. - for (int index = 0; index < length(); index++) { - if (unchecked_method_at(index) == old_method) { - put_method_at(new_method, index); - // For default methods, need to update the _default_methods array - // which can only have one method entry for a given signature - bool updated_default = false; - if (old_method->is_default_method()) { - updated_default = adjust_default_method(index, old_method, new_method); - } +// search the vtable for uses of either obsolete or EMCP methods +void klassVtable::adjust_method_entries(InstanceKlass* holder, bool * trace_name_printed) { + int prn_enabled = 0; + for (int index = 0; index < length(); index++) { + Method* old_method = unchecked_method_at(index); + if (old_method == NULL || old_method->method_holder() != holder || !old_method->is_old()) { + continue; // skip uninteresting entries + } + assert(!old_method->is_deleted(), "vtable methods may not be deleted"); - if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) { - if (!(*trace_name_printed)) { - // RC_TRACE_MESG macro has an embedded ResourceMark - RC_TRACE_MESG(("adjust: klassname=%s for methods from name=%s", - klass()->external_name(), - old_method->method_holder()->external_name())); - *trace_name_printed = true; - } - // RC_TRACE macro has an embedded ResourceMark - RC_TRACE(0x00100000, ("vtable method update: %s(%s), updated default = %s", - new_method->name()->as_C_string(), - new_method->signature()->as_C_string(), - updated_default ? "true" : "false")); - } - // cannot 'break' here; see for-loop comment above. + Method* new_method = holder->method_with_idnum(old_method->orig_method_idnum()); + + assert(new_method != NULL, "method_with_idnum() should not be NULL"); + assert(old_method != new_method, "sanity check"); + + put_method_at(new_method, index); + // For default methods, need to update the _default_methods array + // which can only have one method entry for a given signature + bool updated_default = false; + if (old_method->is_default_method()) { + updated_default = adjust_default_method(index, old_method, new_method); + } + + if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) { + if (!(*trace_name_printed)) { + // RC_TRACE_MESG macro has an embedded ResourceMark + RC_TRACE_MESG(("adjust: klassname=%s for methods from name=%s", + klass()->external_name(), + old_method->method_holder()->external_name())); + *trace_name_printed = true; } + // RC_TRACE macro has an embedded ResourceMark + RC_TRACE(0x00100000, ("vtable method update: %s(%s), updated default = %s", + new_method->name()->as_C_string(), + new_method->signature()->as_C_string(), + updated_default ? "true" : "false")); } } } @@ -1194,37 +1193,35 @@ } #if INCLUDE_JVMTI -void klassItable::adjust_method_entries(Method** old_methods, Method** new_methods, - int methods_length, bool * trace_name_printed) { - // search the itable for uses of either obsolete or EMCP methods - for (int j = 0; j < methods_length; j++) { - Method* old_method = old_methods[j]; - Method* new_method = new_methods[j]; - itableMethodEntry* ime = method_entry(0); +// search the itable for uses of either obsolete or EMCP methods +void klassItable::adjust_method_entries(InstanceKlass* holder, bool * trace_name_printed) { - // The itable can describe more than one interface and the same - // method signature can be specified by more than one interface. - // This means we have to do an exhaustive search to find all the - // old_method references. - for (int i = 0; i < _size_method_table; i++) { - if (ime->method() == old_method) { - ime->initialize(new_method); + itableMethodEntry* ime = method_entry(0); + for (int i = 0; i < _size_method_table; i++, ime++) { + Method* old_method = ime->method(); + if (old_method == NULL || old_method->method_holder() != holder || !old_method->is_old()) { + continue; // skip uninteresting entries + } + assert(!old_method->is_deleted(), "itable methods may not be deleted"); - if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) { - if (!(*trace_name_printed)) { - // RC_TRACE_MESG macro has an embedded ResourceMark - RC_TRACE_MESG(("adjust: name=%s", - old_method->method_holder()->external_name())); - *trace_name_printed = true; - } - // RC_TRACE macro has an embedded ResourceMark - RC_TRACE(0x00200000, ("itable method update: %s(%s)", - new_method->name()->as_C_string(), - new_method->signature()->as_C_string())); - } - // cannot 'break' here; see for-loop comment above. + Method* new_method = holder->method_with_idnum(old_method->orig_method_idnum()); + + assert(new_method != NULL, "method_with_idnum() should not be NULL"); + assert(old_method != new_method, "sanity check"); + + ime->initialize(new_method); + + if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) { + if (!(*trace_name_printed)) { + // RC_TRACE_MESG macro has an embedded ResourceMark + RC_TRACE_MESG(("adjust: name=%s", + old_method->method_holder()->external_name())); + *trace_name_printed = true; } - ime++; + // RC_TRACE macro has an embedded ResourceMark + RC_TRACE(0x00200000, ("itable method update: %s(%s)", + new_method->name()->as_C_string(), + new_method->signature()->as_C_string())); } } } --- old/src/share/vm/oops/klassVtable.hpp Fri Feb 20 13:13:40 2015 +++ new/src/share/vm/oops/klassVtable.hpp Fri Feb 20 13:13:40 2015 @@ -98,8 +98,7 @@ // printed the klass name so that other routines in the adjust_* // group don't print the klass name. bool adjust_default_method(int vtable_index, Method* old_method, Method* new_method); - void adjust_method_entries(Method** old_methods, Method** new_methods, - int methods_length, bool * trace_name_printed); + void adjust_method_entries(InstanceKlass* holder, bool * trace_name_printed); bool check_no_old_or_obsolete_entries(); void dump_vtable(); #endif // INCLUDE_JVMTI @@ -288,8 +287,7 @@ // trace_name_printed is set to true if the current call has // printed the klass name so that other routines in the adjust_* // group don't print the klass name. - void adjust_method_entries(Method** old_methods, Method** new_methods, - int methods_length, bool * trace_name_printed); + void adjust_method_entries(InstanceKlass* holder, bool * trace_name_printed); bool check_no_old_or_obsolete_entries(); void dump_itable(); #endif // INCLUDE_JVMTI --- old/src/share/vm/oops/method.cpp Fri Feb 20 13:13:42 2015 +++ new/src/share/vm/oops/method.cpp Fri Feb 20 13:13:41 2015 @@ -1450,6 +1450,7 @@ for (int i = 0; i < length; i++) { Method* m = methods->at(i); m->set_method_idnum(i); + m->set_orig_method_idnum(i); } } } --- old/src/share/vm/oops/method.hpp Fri Feb 20 13:13:43 2015 +++ new/src/share/vm/oops/method.hpp Fri Feb 20 13:13:43 2015 @@ -233,6 +233,9 @@ u2 method_idnum() const { return constMethod()->method_idnum(); } void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); } + u2 orig_method_idnum() const { return constMethod()->orig_method_idnum(); } + void set_orig_method_idnum(u2 idnum) { constMethod()->set_orig_method_idnum(idnum); } + // code size int code_size() const { return constMethod()->code_size(); } --- old/src/share/vm/prims/jvmtiRedefineClasses.cpp Fri Feb 20 13:13:45 2015 +++ new/src/share/vm/prims/jvmtiRedefineClasses.cpp Fri Feb 20 13:13:45 2015 @@ -781,9 +781,13 @@ Method* idnum_owner = scratch_class->method_with_idnum(old_num); if (idnum_owner != NULL) { // There is already a method assigned this idnum -- switch them + // Take current and original idnum from the new_method idnum_owner->set_method_idnum(new_num); + idnum_owner->set_orig_method_idnum(k_new_method->orig_method_idnum()); } + // Take current and original idnum from the old_method k_new_method->set_method_idnum(old_num); + k_new_method->set_orig_method_idnum(k_old_method->orig_method_idnum()); if (thread->has_pending_exception()) { return JVMTI_ERROR_OUT_OF_MEMORY; } @@ -816,9 +820,12 @@ Method* idnum_owner = scratch_class->method_with_idnum(num); if (idnum_owner != NULL) { // There is already a method assigned this idnum -- switch them + // Take current and original idnum from the new_method idnum_owner->set_method_idnum(new_num); + idnum_owner->set_orig_method_idnum(k_new_method->orig_method_idnum()); } k_new_method->set_method_idnum(num); + k_new_method->set_orig_method_idnum(num); if (thread->has_pending_exception()) { return JVMTI_ERROR_OUT_OF_MEMORY; } @@ -3326,6 +3333,7 @@ // This is a very busy routine. We don't want too much tracing // printed out. bool trace_name_printed = false; + InstanceKlass *the_class = InstanceKlass::cast(_the_class_oop); // Very noisy: only enable this call if you are trying to determine // that a specific class gets found by this routine. @@ -3337,10 +3345,8 @@ // If the class being redefined is java.lang.Object, we need to fix all // array class vtables also if (k->oop_is_array() && _the_class_oop == SystemDictionary::Object_klass()) { - k->vtable()->adjust_method_entries(_matching_old_methods, - _matching_new_methods, - _matching_methods_length, - &trace_name_printed); + k->vtable()->adjust_method_entries(the_class, &trace_name_printed); + } else if (k->oop_is_instance()) { HandleMark hm(_thread); InstanceKlass *ik = InstanceKlass::cast(k); @@ -3382,14 +3388,9 @@ || ik->is_subtype_of(_the_class_oop))) { // ik->vtable() creates a wrapper object; rm cleans it up ResourceMark rm(_thread); - ik->vtable()->adjust_method_entries(_matching_old_methods, - _matching_new_methods, - _matching_methods_length, - &trace_name_printed); - ik->adjust_default_methods(_matching_old_methods, - _matching_new_methods, - _matching_methods_length, - &trace_name_printed); + + ik->vtable()->adjust_method_entries(the_class, &trace_name_printed); + ik->adjust_default_methods(the_class, &trace_name_printed); } // If the current class has an itable and we are either redefining an @@ -3404,10 +3405,8 @@ || ik->is_subclass_of(_the_class_oop))) { // ik->itable() creates a wrapper object; rm cleans it up ResourceMark rm(_thread); - ik->itable()->adjust_method_entries(_matching_old_methods, - _matching_new_methods, - _matching_methods_length, - &trace_name_printed); + + ik->itable()->adjust_method_entries(the_class, &trace_name_printed); } // The constant pools in other classes (other_cp) can refer to @@ -3431,10 +3430,7 @@ other_cp = constantPoolHandle(ik->constants()); cp_cache = other_cp->cache(); if (cp_cache != NULL) { - cp_cache->adjust_method_entries(_matching_old_methods, - _matching_new_methods, - _matching_methods_length, - &trace_name_printed); + cp_cache->adjust_method_entries(the_class, &trace_name_printed); } } @@ -3577,6 +3573,7 @@ // obsolete methods need a unique idnum so they become new entries in // the jmethodID cache in InstanceKlass + assert(old_method->method_idnum() == new_method->method_idnum(), "must match"); u2 num = InstanceKlass::cast(_the_class_oop)->next_method_idnum(); if (num != ConstMethod::UNSET_IDNUM) { old_method->set_method_idnum(num);