author | neliasso |
Thu, 08 Nov 2012 22:39:08 +0100 | |
changeset 14396 | 4ac387decc03 |
parent 14391 | df0a1573d5bd |
parent 14393 | 93a4dcdbebfd |
child 14490 | 5bb45ed999ee |
permissions | -rw-r--r-- |
1 | 1 |
/* |
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* Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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||
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#include "precompiled.hpp" |
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#include "gc_implementation/shared/markSweep.inline.hpp" |
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#include "interpreter/interpreter.hpp" |
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#include "interpreter/rewriter.hpp" |
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#include "memory/universe.inline.hpp" |
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#include "oops/cpCache.hpp" |
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#include "oops/objArrayOop.hpp" |
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#include "oops/oop.inline.hpp" |
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#include "prims/jvmtiRedefineClassesTrace.hpp" |
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#include "prims/methodHandles.hpp" |
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#include "runtime/handles.inline.hpp" |
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#ifndef SERIALGC |
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# include "gc_implementation/parallelScavenge/psPromotionManager.hpp" |
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#endif |
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// Implememtation of ConstantPoolCacheEntry |
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void ConstantPoolCacheEntry::initialize_entry(int index) { |
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assert(0 < index && index < 0x10000, "sanity check"); |
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_indices = index; |
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assert(constant_pool_index() == index, ""); |
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} |
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int ConstantPoolCacheEntry::make_flags(TosState state, |
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int option_bits, |
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int field_index_or_method_params) { |
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assert(state < number_of_states, "Invalid state in make_flags"); |
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int f = ((int)state << tos_state_shift) | option_bits | field_index_or_method_params; |
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// Preserve existing flag bit values |
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// The low bits are a field offset, or else the method parameter size. |
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#ifdef ASSERT |
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TosState old_state = flag_state(); |
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assert(old_state == (TosState)0 || old_state == state, |
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"inconsistent cpCache flags state"); |
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#endif |
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return (_flags | f) ; |
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} |
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void ConstantPoolCacheEntry::set_bytecode_1(Bytecodes::Code code) { |
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#ifdef ASSERT |
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// Read once. |
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volatile Bytecodes::Code c = bytecode_1(); |
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assert(c == 0 || c == code || code == 0, "update must be consistent"); |
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#endif |
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// Need to flush pending stores here before bytecode is written. |
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OrderAccess::release_store_ptr(&_indices, _indices | ((u_char)code << bytecode_1_shift)); |
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} |
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void ConstantPoolCacheEntry::set_bytecode_2(Bytecodes::Code code) { |
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#ifdef ASSERT |
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// Read once. |
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volatile Bytecodes::Code c = bytecode_2(); |
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assert(c == 0 || c == code || code == 0, "update must be consistent"); |
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#endif |
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// Need to flush pending stores here before bytecode is written. |
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OrderAccess::release_store_ptr(&_indices, _indices | ((u_char)code << bytecode_2_shift)); |
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} |
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// Sets f1, ordering with previous writes. |
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void ConstantPoolCacheEntry::release_set_f1(Metadata* f1) { |
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assert(f1 != NULL, ""); |
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OrderAccess::release_store_ptr((HeapWord*) &_f1, f1); |
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} |
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// Sets flags, but only if the value was previously zero. |
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bool ConstantPoolCacheEntry::init_flags_atomic(intptr_t flags) { |
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intptr_t result = Atomic::cmpxchg_ptr(flags, &_flags, 0); |
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return (result == 0); |
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} |
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// Note that concurrent update of both bytecodes can leave one of them |
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// reset to zero. This is harmless; the interpreter will simply re-resolve |
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// the damaged entry. More seriously, the memory synchronization is needed |
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// to flush other fields (f1, f2) completely to memory before the bytecodes |
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// are updated, lest other processors see a non-zero bytecode but zero f1/f2. |
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void ConstantPoolCacheEntry::set_field(Bytecodes::Code get_code, |
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Bytecodes::Code put_code, |
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KlassHandle field_holder, |
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int field_index, |
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int field_offset, |
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TosState field_type, |
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bool is_final, |
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bool is_volatile, |
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Klass* root_klass) { |
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set_f1(field_holder()); |
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set_f2(field_offset); |
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assert((field_index & field_index_mask) == field_index, |
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"field index does not fit in low flag bits"); |
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set_field_flags(field_type, |
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((is_volatile ? 1 : 0) << is_volatile_shift) | |
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((is_final ? 1 : 0) << is_final_shift), |
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field_index); |
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set_bytecode_1(get_code); |
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set_bytecode_2(put_code); |
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NOT_PRODUCT(verify(tty)); |
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} |
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void ConstantPoolCacheEntry::set_parameter_size(int value) { |
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// This routine is called only in corner cases where the CPCE is not yet initialized. |
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// See AbstractInterpreter::deopt_continue_after_entry. |
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assert(_flags == 0 || parameter_size() == 0 || parameter_size() == value, |
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err_msg("size must not change: parameter_size=%d, value=%d", parameter_size(), value)); |
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// Setting the parameter size by itself is only safe if the |
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// current value of _flags is 0, otherwise another thread may have |
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// updated it and we don't want to overwrite that value. Don't |
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// bother trying to update it once it's nonzero but always make |
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// sure that the final parameter size agrees with what was passed. |
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if (_flags == 0) { |
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Atomic::cmpxchg_ptr((value & parameter_size_mask), &_flags, 0); |
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} |
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guarantee(parameter_size() == value, |
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err_msg("size must not change: parameter_size=%d, value=%d", parameter_size(), value)); |
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} |
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void ConstantPoolCacheEntry::set_method(Bytecodes::Code invoke_code, |
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methodHandle method, |
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int vtable_index) { |
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assert(method->interpreter_entry() != NULL, "should have been set at this point"); |
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144 |
assert(!method->is_obsolete(), "attempt to write obsolete method to cpCache"); |
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int byte_no = -1; |
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bool change_to_virtual = false; |
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switch (invoke_code) { |
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case Bytecodes::_invokeinterface: |
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// We get here from InterpreterRuntime::resolve_invoke when an invokeinterface |
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// instruction somehow links to a non-interface method (in Object). |
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// In that case, the method has no itable index and must be invoked as a virtual. |
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// Set a flag to keep track of this corner case. |
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change_to_virtual = true; |
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156 |
|
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// ...and fall through as if we were handling invokevirtual: |
1 | 158 |
case Bytecodes::_invokevirtual: |
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{ |
1 | 160 |
if (method->can_be_statically_bound()) { |
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// set_f2_as_vfinal_method checks if is_vfinal flag is true. |
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set_method_flags(as_TosState(method->result_type()), |
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( 1 << is_vfinal_shift) | |
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((method->is_final_method() ? 1 : 0) << is_final_shift) | |
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((change_to_virtual ? 1 : 0) << is_forced_virtual_shift), |
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method()->size_of_parameters()); |
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167 |
set_f2_as_vfinal_method(method()); |
1 | 168 |
} else { |
169 |
assert(vtable_index >= 0, "valid index"); |
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assert(!method->is_final_method(), "sanity"); |
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set_method_flags(as_TosState(method->result_type()), |
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((change_to_virtual ? 1 : 0) << is_forced_virtual_shift), |
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173 |
method()->size_of_parameters()); |
1 | 174 |
set_f2(vtable_index); |
175 |
} |
|
176 |
byte_no = 2; |
|
177 |
break; |
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} |
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|
1 | 180 |
case Bytecodes::_invokespecial: |
181 |
case Bytecodes::_invokestatic: |
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// Note: Read and preserve the value of the is_vfinal flag on any |
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// invokevirtual bytecode shared with this constant pool cache entry. |
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// It is cheap and safe to consult is_vfinal() at all times. |
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// Once is_vfinal is set, it must stay that way, lest we get a dangling oop. |
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set_method_flags(as_TosState(method->result_type()), |
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((is_vfinal() ? 1 : 0) << is_vfinal_shift) | |
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((method->is_final_method() ? 1 : 0) << is_final_shift), |
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189 |
method()->size_of_parameters()); |
1 | 190 |
set_f1(method()); |
191 |
byte_no = 1; |
|
192 |
break; |
|
193 |
default: |
|
194 |
ShouldNotReachHere(); |
|
195 |
break; |
|
196 |
} |
|
197 |
||
198 |
// Note: byte_no also appears in TemplateTable::resolve. |
|
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if (byte_no == 1) { |
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assert(invoke_code != Bytecodes::_invokevirtual && |
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invoke_code != Bytecodes::_invokeinterface, ""); |
1 | 202 |
set_bytecode_1(invoke_code); |
203 |
} else if (byte_no == 2) { |
|
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if (change_to_virtual) { |
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assert(invoke_code == Bytecodes::_invokeinterface, ""); |
1 | 206 |
// NOTE: THIS IS A HACK - BE VERY CAREFUL!!! |
207 |
// |
|
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// Workaround for the case where we encounter an invokeinterface, but we |
|
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// should really have an _invokevirtual since the resolved method is a |
|
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// virtual method in java.lang.Object. This is a corner case in the spec |
|
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// but is presumably legal. javac does not generate this code. |
|
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// |
|
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// We set bytecode_1() to _invokeinterface, because that is the |
|
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// bytecode # used by the interpreter to see if it is resolved. |
|
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// We set bytecode_2() to _invokevirtual. |
|
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// See also interpreterRuntime.cpp. (8/25/2000) |
|
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// Only set resolved for the invokeinterface case if method is public. |
|
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// Otherwise, the method needs to be reresolved with caller for each |
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// interface call. |
|
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if (method->is_public()) set_bytecode_1(invoke_code); |
|
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} else { |
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assert(invoke_code == Bytecodes::_invokevirtual, ""); |
1 | 223 |
} |
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// set up for invokevirtual, even if linking for invokeinterface also: |
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set_bytecode_2(Bytecodes::_invokevirtual); |
1 | 226 |
} else { |
227 |
ShouldNotReachHere(); |
|
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} |
|
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NOT_PRODUCT(verify(tty)); |
|
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} |
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231 |
||
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void ConstantPoolCacheEntry::set_interface_call(methodHandle method, int index) { |
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InstanceKlass* interf = method->method_holder(); |
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assert(interf->is_interface(), "must be an interface"); |
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assert(!method->is_final_method(), "interfaces do not have final methods; cannot link to one here"); |
1 | 237 |
set_f1(interf); |
238 |
set_f2(index); |
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set_method_flags(as_TosState(method->result_type()), |
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0, // no option bits |
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method()->size_of_parameters()); |
1 | 242 |
set_bytecode_1(Bytecodes::_invokeinterface); |
243 |
} |
|
244 |
||
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void ConstantPoolCacheEntry::set_method_handle(constantPoolHandle cpool, const CallInfo &call_info) { |
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set_method_handle_common(cpool, Bytecodes::_invokehandle, call_info); |
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} |
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249 |
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void ConstantPoolCacheEntry::set_dynamic_call(constantPoolHandle cpool, const CallInfo &call_info) { |
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set_method_handle_common(cpool, Bytecodes::_invokedynamic, call_info); |
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} |
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253 |
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void ConstantPoolCacheEntry::set_method_handle_common(constantPoolHandle cpool, |
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Bytecodes::Code invoke_code, |
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const CallInfo &call_info) { |
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// NOTE: This CPCE can be the subject of data races. |
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// There are three words to update: flags, refs[f2], f1 (in that order). |
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// Writers must store all other values before f1. |
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// Readers must test f1 first for non-null before reading other fields. |
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// Competing writers must acquire exclusive access via a lock. |
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// A losing writer waits on the lock until the winner writes f1 and leaves |
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// the lock, so that when the losing writer returns, he can use the linked |
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// cache entry. |
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265 |
|
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MonitorLockerEx ml(cpool->lock()); |
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if (!is_f1_null()) { |
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return; |
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269 |
} |
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270 |
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const methodHandle adapter = call_info.resolved_method(); |
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const Handle appendix = call_info.resolved_appendix(); |
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const Handle method_type = call_info.resolved_method_type(); |
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const bool has_appendix = appendix.not_null(); |
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const bool has_method_type = method_type.not_null(); |
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276 |
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// Write the flags. |
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set_method_flags(as_TosState(adapter->result_type()), |
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((has_appendix ? 1 : 0) << has_appendix_shift ) | |
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((has_method_type ? 1 : 0) << has_method_type_shift) | |
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( 1 << is_final_shift ), |
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adapter->size_of_parameters()); |
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283 |
|
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284 |
if (TraceInvokeDynamic) { |
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285 |
tty->print_cr("set_method_handle bc=%d appendix="PTR_FORMAT"%s method_type="PTR_FORMAT"%s method="PTR_FORMAT" ", |
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286 |
invoke_code, |
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(intptr_t)appendix(), (has_appendix ? "" : " (unused)"), |
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288 |
(intptr_t)method_type(), (has_method_type ? "" : " (unused)"), |
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|
289 |
(intptr_t)adapter()); |
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290 |
adapter->print(); |
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|
291 |
if (has_appendix) appendix()->print(); |
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|
292 |
} |
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|
293 |
|
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|
294 |
// Method handle invokes and invokedynamic sites use both cp cache words. |
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295 |
// refs[f2], if not null, contains a value passed as a trailing argument to the adapter. |
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296 |
// In the general case, this could be the call site's MethodType, |
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297 |
// for use with java.lang.Invokers.checkExactType, or else a CallSite object. |
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298 |
// f1 contains the adapter method which manages the actual call. |
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299 |
// In the general case, this is a compiled LambdaForm. |
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|
300 |
// (The Java code is free to optimize these calls by binding other |
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|
301 |
// sorts of methods and appendices to call sites.) |
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302 |
// JVM-level linking is via f1, as if for invokespecial, and signatures are erased. |
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303 |
// The appendix argument (if any) is added to the signature, and is counted in the parameter_size bits. |
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304 |
// Even with the appendix, the method will never take more than 255 parameter slots. |
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|
305 |
// |
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306 |
// This means that given a call site like (List)mh.invoke("foo"), |
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307 |
// the f1 method has signature '(Ljl/Object;Ljl/invoke/MethodType;)Ljl/Object;', |
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308 |
// not '(Ljava/lang/String;)Ljava/util/List;'. |
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309 |
// The fact that String and List are involved is encoded in the MethodType in refs[f2]. |
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310 |
// This allows us to create fewer method oops, while keeping type safety. |
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311 |
// |
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312 |
|
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objArrayHandle resolved_references = cpool->resolved_references(); |
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// Store appendix, if any. |
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315 |
if (has_appendix) { |
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316 |
const int appendix_index = f2_as_index() + _indy_resolved_references_appendix_offset; |
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317 |
assert(appendix_index >= 0 && appendix_index < resolved_references->length(), "oob"); |
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318 |
assert(resolved_references->obj_at(appendix_index) == NULL, "init just once"); |
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319 |
resolved_references->obj_at_put(appendix_index, appendix()); |
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320 |
} |
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321 |
|
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322 |
// Store MethodType, if any. |
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323 |
if (has_method_type) { |
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324 |
const int method_type_index = f2_as_index() + _indy_resolved_references_method_type_offset; |
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325 |
assert(method_type_index >= 0 && method_type_index < resolved_references->length(), "oob"); |
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326 |
assert(resolved_references->obj_at(method_type_index) == NULL, "init just once"); |
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327 |
resolved_references->obj_at_put(method_type_index, method_type()); |
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328 |
} |
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329 |
|
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330 |
release_set_f1(adapter()); // This must be the last one to set (see NOTE above)! |
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331 |
|
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changeset
|
332 |
// The interpreter assembly code does not check byte_2, |
8da0dc50a6e4
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|
333 |
// but it is used by is_resolved, method_if_resolved, etc. |
13728
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|
334 |
set_bytecode_1(invoke_code); |
13391
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changeset
|
335 |
NOT_PRODUCT(verify(tty)); |
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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diff
changeset
|
336 |
if (TraceInvokeDynamic) { |
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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diff
changeset
|
337 |
this->print(tty, 0); |
30245956af37
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changeset
|
338 |
} |
2570
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6655646: dynamic languages need dynamically linked call sites
jrose
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670
diff
changeset
|
339 |
} |
ecc7862946d4
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
670
diff
changeset
|
340 |
|
13728
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changeset
|
341 |
Method* ConstantPoolCacheEntry::method_if_resolved(constantPoolHandle cpool) { |
10008
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changeset
|
342 |
// Decode the action of set_method and set_interface_call |
13391
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|
343 |
Bytecodes::Code invoke_code = bytecode_1(); |
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|
344 |
if (invoke_code != (Bytecodes::Code)0) { |
13728
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|
345 |
Metadata* f1 = (Metadata*)_f1; |
10008
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changeset
|
346 |
if (f1 != NULL) { |
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changeset
|
347 |
switch (invoke_code) { |
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changeset
|
348 |
case Bytecodes::_invokeinterface: |
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|
349 |
assert(f1->is_klass(), ""); |
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|
350 |
return klassItable::method_for_itable_index((Klass*)f1, f2_as_index()); |
10008
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changeset
|
351 |
case Bytecodes::_invokestatic: |
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|
352 |
case Bytecodes::_invokespecial: |
13391
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|
353 |
assert(!has_appendix(), ""); |
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changeset
|
354 |
case Bytecodes::_invokehandle: |
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changeset
|
355 |
case Bytecodes::_invokedynamic: |
10008
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changeset
|
356 |
assert(f1->is_method(), ""); |
13728
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changeset
|
357 |
return (Method*)f1; |
10008
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changeset
|
358 |
} |
d84de97ad847
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diff
changeset
|
359 |
} |
d84de97ad847
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diff
changeset
|
360 |
} |
13391
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changeset
|
361 |
invoke_code = bytecode_2(); |
30245956af37
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diff
changeset
|
362 |
if (invoke_code != (Bytecodes::Code)0) { |
10008
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changeset
|
363 |
switch (invoke_code) { |
d84de97ad847
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diff
changeset
|
364 |
case Bytecodes::_invokevirtual: |
d84de97ad847
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diff
changeset
|
365 |
if (is_vfinal()) { |
d84de97ad847
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changeset
|
366 |
// invokevirtual |
13728
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changeset
|
367 |
Method* m = f2_as_vfinal_method(); |
10008
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7056328: JSR 292 invocation sometimes fails in adapters for types not on boot class path
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changeset
|
368 |
assert(m->is_method(), ""); |
d84de97ad847
7056328: JSR 292 invocation sometimes fails in adapters for types not on boot class path
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changeset
|
369 |
return m; |
d84de97ad847
7056328: JSR 292 invocation sometimes fails in adapters for types not on boot class path
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diff
changeset
|
370 |
} else { |
d84de97ad847
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diff
changeset
|
371 |
int holder_index = cpool->uncached_klass_ref_index_at(constant_pool_index()); |
d84de97ad847
7056328: JSR 292 invocation sometimes fails in adapters for types not on boot class path
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changeset
|
372 |
if (cpool->tag_at(holder_index).is_klass()) { |
13728
882756847a04
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changeset
|
373 |
Klass* klass = cpool->resolved_klass_at(holder_index); |
10008
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7056328: JSR 292 invocation sometimes fails in adapters for types not on boot class path
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changeset
|
374 |
if (!Klass::cast(klass)->oop_is_instance()) |
d84de97ad847
7056328: JSR 292 invocation sometimes fails in adapters for types not on boot class path
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changeset
|
375 |
klass = SystemDictionary::Object_klass(); |
13728
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changeset
|
376 |
return InstanceKlass::cast(klass)->method_at_vtable(f2_as_index()); |
10008
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7056328: JSR 292 invocation sometimes fails in adapters for types not on boot class path
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diff
changeset
|
377 |
} |
d84de97ad847
7056328: JSR 292 invocation sometimes fails in adapters for types not on boot class path
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parents:
9328
diff
changeset
|
378 |
} |
13391
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
379 |
break; |
10008
d84de97ad847
7056328: JSR 292 invocation sometimes fails in adapters for types not on boot class path
jrose
parents:
9328
diff
changeset
|
380 |
} |
d84de97ad847
7056328: JSR 292 invocation sometimes fails in adapters for types not on boot class path
jrose
parents:
9328
diff
changeset
|
381 |
} |
d84de97ad847
7056328: JSR 292 invocation sometimes fails in adapters for types not on boot class path
jrose
parents:
9328
diff
changeset
|
382 |
return NULL; |
d84de97ad847
7056328: JSR 292 invocation sometimes fails in adapters for types not on boot class path
jrose
parents:
9328
diff
changeset
|
383 |
} |
d84de97ad847
7056328: JSR 292 invocation sometimes fails in adapters for types not on boot class path
jrose
parents:
9328
diff
changeset
|
384 |
|
d84de97ad847
7056328: JSR 292 invocation sometimes fails in adapters for types not on boot class path
jrose
parents:
9328
diff
changeset
|
385 |
|
13728
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
386 |
oop ConstantPoolCacheEntry::appendix_if_resolved(constantPoolHandle cpool) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
387 |
if (is_f1_null() || !has_appendix()) |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
388 |
return NULL; |
13929
8da0dc50a6e4
7200949: JSR 292: rubybench/bench/time/bench_base64.rb fails with jruby.jar not on boot class path
twisti
parents:
13740
diff
changeset
|
389 |
const int ref_index = f2_as_index() + _indy_resolved_references_appendix_offset; |
8da0dc50a6e4
7200949: JSR 292: rubybench/bench/time/bench_base64.rb fails with jruby.jar not on boot class path
twisti
parents:
13740
diff
changeset
|
390 |
objArrayOop resolved_references = cpool->resolved_references(); |
8da0dc50a6e4
7200949: JSR 292: rubybench/bench/time/bench_base64.rb fails with jruby.jar not on boot class path
twisti
parents:
13740
diff
changeset
|
391 |
return resolved_references->obj_at(ref_index); |
8da0dc50a6e4
7200949: JSR 292: rubybench/bench/time/bench_base64.rb fails with jruby.jar not on boot class path
twisti
parents:
13740
diff
changeset
|
392 |
} |
8da0dc50a6e4
7200949: JSR 292: rubybench/bench/time/bench_base64.rb fails with jruby.jar not on boot class path
twisti
parents:
13740
diff
changeset
|
393 |
|
8da0dc50a6e4
7200949: JSR 292: rubybench/bench/time/bench_base64.rb fails with jruby.jar not on boot class path
twisti
parents:
13740
diff
changeset
|
394 |
|
8da0dc50a6e4
7200949: JSR 292: rubybench/bench/time/bench_base64.rb fails with jruby.jar not on boot class path
twisti
parents:
13740
diff
changeset
|
395 |
oop ConstantPoolCacheEntry::method_type_if_resolved(constantPoolHandle cpool) { |
8da0dc50a6e4
7200949: JSR 292: rubybench/bench/time/bench_base64.rb fails with jruby.jar not on boot class path
twisti
parents:
13740
diff
changeset
|
396 |
if (is_f1_null() || !has_method_type()) |
8da0dc50a6e4
7200949: JSR 292: rubybench/bench/time/bench_base64.rb fails with jruby.jar not on boot class path
twisti
parents:
13740
diff
changeset
|
397 |
return NULL; |
8da0dc50a6e4
7200949: JSR 292: rubybench/bench/time/bench_base64.rb fails with jruby.jar not on boot class path
twisti
parents:
13740
diff
changeset
|
398 |
const int ref_index = f2_as_index() + _indy_resolved_references_method_type_offset; |
13728
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
399 |
objArrayOop resolved_references = cpool->resolved_references(); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
400 |
return resolved_references->obj_at(ref_index); |
1 | 401 |
} |
402 |
||
403 |
||
404 |
// RedefineClasses() API support: |
|
405 |
// If this constantPoolCacheEntry refers to old_method then update it |
|
406 |
// to refer to new_method. |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
407 |
bool ConstantPoolCacheEntry::adjust_method_entry(Method* old_method, |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
408 |
Method* new_method, bool * trace_name_printed) { |
1 | 409 |
|
410 |
if (is_vfinal()) { |
|
13391
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11956
diff
changeset
|
411 |
// virtual and final so _f2 contains method ptr instead of vtable index |
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11956
diff
changeset
|
412 |
if (f2_as_vfinal_method() == old_method) { |
1 | 413 |
// match old_method so need an update |
13391
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
414 |
// NOTE: can't use set_f2_as_vfinal_method as it asserts on different values |
1 | 415 |
_f2 = (intptr_t)new_method; |
416 |
if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) { |
|
417 |
if (!(*trace_name_printed)) { |
|
418 |
// RC_TRACE_MESG macro has an embedded ResourceMark |
|
419 |
RC_TRACE_MESG(("adjust: name=%s", |
|
14391
df0a1573d5bd
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
parents:
13929
diff
changeset
|
420 |
old_method->method_holder()->external_name())); |
1 | 421 |
*trace_name_printed = true; |
422 |
} |
|
423 |
// RC_TRACE macro has an embedded ResourceMark |
|
424 |
RC_TRACE(0x00400000, ("cpc vf-entry update: %s(%s)", |
|
425 |
new_method->name()->as_C_string(), |
|
426 |
new_method->signature()->as_C_string())); |
|
427 |
} |
|
428 |
||
429 |
return true; |
|
430 |
} |
|
431 |
||
432 |
// f1() is not used with virtual entries so bail out |
|
433 |
return false; |
|
434 |
} |
|
435 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
436 |
if (_f1 == NULL) { |
1 | 437 |
// NULL f1() means this is a virtual entry so bail out |
438 |
// We are assuming that the vtable index does not need change. |
|
439 |
return false; |
|
440 |
} |
|
441 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
442 |
if (_f1 == old_method) { |
1 | 443 |
_f1 = new_method; |
444 |
if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) { |
|
445 |
if (!(*trace_name_printed)) { |
|
446 |
// RC_TRACE_MESG macro has an embedded ResourceMark |
|
447 |
RC_TRACE_MESG(("adjust: name=%s", |
|
14391
df0a1573d5bd
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
parents:
13929
diff
changeset
|
448 |
old_method->method_holder()->external_name())); |
1 | 449 |
*trace_name_printed = true; |
450 |
} |
|
451 |
// RC_TRACE macro has an embedded ResourceMark |
|
452 |
RC_TRACE(0x00400000, ("cpc entry update: %s(%s)", |
|
453 |
new_method->name()->as_C_string(), |
|
454 |
new_method->signature()->as_C_string())); |
|
455 |
} |
|
456 |
||
457 |
return true; |
|
458 |
} |
|
459 |
||
460 |
return false; |
|
461 |
} |
|
462 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
463 |
#ifndef PRODUCT |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
464 |
bool ConstantPoolCacheEntry::check_no_old_entries() { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
465 |
if (is_vfinal()) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
466 |
Metadata* f2 = (Metadata*)_f2; |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
467 |
return (f2->is_valid() && f2->is_method() && !((Method*)f2)->is_old()); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
468 |
} else { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
469 |
return (_f1 == NULL || (_f1->is_valid() && _f1->is_method() && !((Method*)_f1)->is_old())); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
470 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
471 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
472 |
#endif |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
473 |
|
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
474 |
bool ConstantPoolCacheEntry::is_interesting_method_entry(Klass* k) { |
1 | 475 |
if (!is_method_entry()) { |
476 |
// not a method entry so not interesting by default |
|
477 |
return false; |
|
478 |
} |
|
479 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
480 |
Method* m = NULL; |
1 | 481 |
if (is_vfinal()) { |
482 |
// virtual and final so _f2 contains method ptr instead of vtable index |
|
13391
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11956
diff
changeset
|
483 |
m = f2_as_vfinal_method(); |
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
484 |
} else if (is_f1_null()) { |
1 | 485 |
// NULL _f1 means this is a virtual entry so also not interesting |
486 |
return false; |
|
487 |
} else { |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
488 |
if (!(_f1->is_method())) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
489 |
// _f1 can also contain a Klass* for an interface |
1 | 490 |
return false; |
491 |
} |
|
13391
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11956
diff
changeset
|
492 |
m = f1_as_method(); |
1 | 493 |
} |
494 |
||
495 |
assert(m != NULL && m->is_method(), "sanity check"); |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
496 |
if (m == NULL || !m->is_method() || (k != NULL && m->method_holder() != k)) { |
1 | 497 |
// robustness for above sanity checks or method is not in |
498 |
// the interesting class |
|
499 |
return false; |
|
500 |
} |
|
501 |
||
502 |
// the method is in the interesting class so the entry is interesting |
|
503 |
return true; |
|
504 |
} |
|
505 |
||
506 |
void ConstantPoolCacheEntry::print(outputStream* st, int index) const { |
|
507 |
// print separator |
|
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508 |
if (index == 0) st->print_cr(" -------------"); |
1 | 509 |
// print entry |
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|
510 |
st->print("%3d ("PTR_FORMAT") ", index, (intptr_t)this); |
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|
511 |
st->print_cr("[%02x|%02x|%5d]", bytecode_2(), bytecode_1(), constant_pool_index()); |
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|
512 |
st->print_cr(" [ "PTR_FORMAT"]", (intptr_t)_f1); |
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|
513 |
st->print_cr(" [ "PTR_FORMAT"]", (intptr_t)_f2); |
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|
514 |
st->print_cr(" [ "PTR_FORMAT"]", (intptr_t)_flags); |
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|
515 |
st->print_cr(" -------------"); |
1 | 516 |
} |
517 |
||
518 |
void ConstantPoolCacheEntry::verify(outputStream* st) const { |
|
519 |
// not implemented yet |
|
520 |
} |
|
521 |
||
522 |
// Implementation of ConstantPoolCache |
|
523 |
||
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|
524 |
ConstantPoolCache* ConstantPoolCache::allocate(ClassLoaderData* loader_data, int length, TRAPS) { |
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|
525 |
int size = ConstantPoolCache::size(length); |
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|
526 |
|
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|
527 |
return new (loader_data, size, false, THREAD) ConstantPoolCache(length); |
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|
528 |
} |
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|
529 |
|
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|
530 |
void ConstantPoolCache::initialize(intArray& inverse_index_map, intArray& invokedynamic_references_map) { |
1 | 531 |
assert(inverse_index_map.length() == length(), "inverse index map must have same length as cache"); |
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|
532 |
for (int i = 0; i < length(); i++) { |
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|
533 |
ConstantPoolCacheEntry* e = entry_at(i); |
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|
534 |
int original_index = inverse_index_map[i]; |
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|
535 |
e->initialize_entry(original_index); |
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|
536 |
assert(entry_at(i) == e, "sanity"); |
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|
537 |
} |
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|
538 |
for (int ref = 0; ref < invokedynamic_references_map.length(); ref++) { |
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|
539 |
const int cpci = invokedynamic_references_map[ref]; |
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|
540 |
if (cpci >= 0) { |
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|
541 |
#ifdef ASSERT |
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|
542 |
// invokedynamic and invokehandle have more entries; check if they |
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|
543 |
// all point to the same constant pool cache entry. |
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|
544 |
for (int entry = 1; entry < ConstantPoolCacheEntry::_indy_resolved_references_entries; entry++) { |
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|
545 |
const int cpci_next = invokedynamic_references_map[ref + entry]; |
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|
546 |
assert(cpci == cpci_next, err_msg_res("%d == %d", cpci, cpci_next)); |
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|
547 |
} |
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|
548 |
#endif |
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|
549 |
entry_at(cpci)->initialize_resolved_reference_index(ref); |
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|
550 |
ref += ConstantPoolCacheEntry::_indy_resolved_references_entries - 1; // skip extra entries |
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|
551 |
} |
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|
552 |
} |
1 | 553 |
} |
554 |
||
555 |
// RedefineClasses() API support: |
|
556 |
// If any entry of this constantPoolCache points to any of |
|
557 |
// old_methods, replace it with the corresponding new_method. |
|
13728
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|
558 |
void ConstantPoolCache::adjust_method_entries(Method** old_methods, Method** new_methods, |
1 | 559 |
int methods_length, bool * trace_name_printed) { |
560 |
||
561 |
if (methods_length == 0) { |
|
562 |
// nothing to do if there are no methods |
|
563 |
return; |
|
564 |
} |
|
565 |
||
566 |
// get shorthand for the interesting class |
|
13728
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|
567 |
Klass* old_holder = old_methods[0]->method_holder(); |
1 | 568 |
|
569 |
for (int i = 0; i < length(); i++) { |
|
570 |
if (!entry_at(i)->is_interesting_method_entry(old_holder)) { |
|
571 |
// skip uninteresting methods |
|
572 |
continue; |
|
573 |
} |
|
574 |
||
575 |
// The constantPoolCache contains entries for several different |
|
576 |
// things, but we only care about methods. In fact, we only care |
|
577 |
// about methods in the same class as the one that contains the |
|
578 |
// old_methods. At this point, we have an interesting entry. |
|
579 |
||
580 |
for (int j = 0; j < methods_length; j++) { |
|
13728
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|
581 |
Method* old_method = old_methods[j]; |
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|
582 |
Method* new_method = new_methods[j]; |
1 | 583 |
|
584 |
if (entry_at(i)->adjust_method_entry(old_method, new_method, |
|
585 |
trace_name_printed)) { |
|
586 |
// current old_method matched this entry and we updated it so |
|
587 |
// break out and get to the next interesting entry if there one |
|
588 |
break; |
|
589 |
} |
|
590 |
} |
|
591 |
} |
|
592 |
} |
|
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|
593 |
|
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|
594 |
#ifndef PRODUCT |
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|
595 |
bool ConstantPoolCache::check_no_old_entries() { |
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changeset
|
596 |
for (int i = 1; i < length(); i++) { |
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|
597 |
if (entry_at(i)->is_interesting_method_entry(NULL) && |
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changeset
|
598 |
!entry_at(i)->check_no_old_entries()) { |
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changeset
|
599 |
return false; |
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changeset
|
600 |
} |
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changeset
|
601 |
} |
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changeset
|
602 |
return true; |
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6964458: Reimplement class meta-data storage to use native memory
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changeset
|
603 |
} |
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changeset
|
604 |
#endif // PRODUCT |
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changeset
|
605 |
|
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changeset
|
606 |
|
882756847a04
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changeset
|
607 |
// Printing |
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changeset
|
608 |
|
882756847a04
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changeset
|
609 |
void ConstantPoolCache::print_on(outputStream* st) const { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
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changeset
|
610 |
assert(is_constantPoolCache(), "obj must be constant pool cache"); |
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changeset
|
611 |
st->print_cr(internal_name()); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
612 |
// print constant pool cache entries |
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changeset
|
613 |
for (int i = 0; i < length(); i++) entry_at(i)->print(st, i); |
882756847a04
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changeset
|
614 |
} |
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changeset
|
615 |
|
882756847a04
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changeset
|
616 |
void ConstantPoolCache::print_value_on(outputStream* st) const { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
617 |
assert(is_constantPoolCache(), "obj must be constant pool cache"); |
882756847a04
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changeset
|
618 |
st->print("cache [%d]", length()); |
882756847a04
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changeset
|
619 |
print_address_on(st); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
620 |
st->print(" for "); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
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changeset
|
621 |
constant_pool()->print_value_on(st); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
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changeset
|
622 |
} |
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changeset
|
623 |
|
882756847a04
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
624 |
|
882756847a04
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diff
changeset
|
625 |
// Verification |
882756847a04
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changeset
|
626 |
|
882756847a04
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diff
changeset
|
627 |
void ConstantPoolCache::verify_on(outputStream* st) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
628 |
guarantee(is_constantPoolCache(), "obj must be constant pool cache"); |
882756847a04
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changeset
|
629 |
// print constant pool cache entries |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
630 |
for (int i = 0; i < length(); i++) entry_at(i)->verify(st); |
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changeset
|
631 |
} |