author | xdono |
Tue, 28 Jul 2009 12:12:40 -0700 | |
changeset 3261 | c7d5aae8d3f7 |
parent 2570 | ecc7862946d4 |
child 4429 | d7eb4e2099aa |
permissions | -rw-r--r-- |
1 | 1 |
/* |
3261 | 2 |
* Copyright 1998-2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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* CA 95054 USA or visit www.sun.com if you need additional information or |
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* have any questions. |
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* |
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*/ |
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#include "incls/_precompiled.incl" |
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#include "incls/_cpCacheOop.cpp.incl" |
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// Implememtation of ConstantPoolCacheEntry |
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void ConstantPoolCacheEntry::set_initial_state(int index) { |
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if (constantPoolCacheOopDesc::is_secondary_index(index)) { |
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// Hack: The rewriter is trying to say that this entry itself |
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// will be a secondary entry. |
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int main_index = constantPoolCacheOopDesc::decode_secondary_index(index); |
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assert(0 <= main_index && main_index < 0x10000, "sanity check"); |
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_indices = (main_index << 16); |
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assert(main_entry_index() == main_index, ""); |
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return; |
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} |
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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::as_flags(TosState state, bool is_final, |
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bool is_vfinal, bool is_volatile, |
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bool is_method_interface, bool is_method) { |
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int f = state; |
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assert( state < number_of_states, "Invalid state in as_flags"); |
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f <<= 1; |
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if (is_final) f |= 1; |
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f <<= 1; |
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if (is_vfinal) f |= 1; |
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f <<= 1; |
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if (is_volatile) f |= 1; |
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f <<= 1; |
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if (is_method_interface) f |= 1; |
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f <<= 1; |
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if (is_method) f |= 1; |
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f <<= ConstantPoolCacheEntry::hotSwapBit; |
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// Preserve existing flag bit values |
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#ifdef ASSERT |
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int old_state = ((_flags >> tosBits) & 0x0F); |
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assert(old_state == 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 << 16)); |
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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 << 24)); |
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} |
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#ifdef ASSERT |
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// It is possible to have two different dummy methodOops created |
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// when the resolve code for invoke interface executes concurrently |
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// Hence the assertion below is weakened a bit for the invokeinterface |
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// case. |
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bool ConstantPoolCacheEntry::same_methodOop(oop cur_f1, oop f1) { |
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return (cur_f1 == f1 || ((methodOop)cur_f1)->name() == |
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((methodOop)f1)->name() || ((methodOop)cur_f1)->signature() == |
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((methodOop)f1)->signature()); |
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} |
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#endif |
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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 orig_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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set_f1(field_holder()); |
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set_f2(field_offset); |
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// The field index is used by jvm/ti and is the index into fields() array |
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// in holder instanceKlass. This is scaled by instanceKlass::next_offset. |
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assert((orig_field_index % instanceKlass::next_offset) == 0, "wierd index"); |
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const int field_index = orig_field_index / instanceKlass::next_offset; |
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assert(field_index <= field_index_mask, |
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"field index does not fit in low flag bits"); |
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set_flags(as_flags(field_type, is_final, false, is_volatile, false, false) | |
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(field_index & field_index_mask)); |
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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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int ConstantPoolCacheEntry::field_index() const { |
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return (_flags & field_index_mask) * instanceKlass::next_offset; |
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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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assert(!method->is_obsolete(), "attempt to write obsolete method to cpCache"); |
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bool change_to_virtual = (invoke_code == Bytecodes::_invokeinterface); |
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int byte_no = -1; |
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bool needs_vfinal_flag = false; |
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switch (invoke_code) { |
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case Bytecodes::_invokedynamic: |
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case Bytecodes::_invokevirtual: |
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case Bytecodes::_invokeinterface: { |
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if (method->can_be_statically_bound()) { |
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set_f2((intptr_t)method()); |
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needs_vfinal_flag = true; |
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} else { |
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assert(vtable_index >= 0, "valid index"); |
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set_f2(vtable_index); |
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} |
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byte_no = 2; |
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break; |
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} |
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case Bytecodes::_invokespecial: |
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// Preserve the value of the vfinal flag on invokevirtual bytecode |
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// which may be shared with this constant pool cache entry. |
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needs_vfinal_flag = is_resolved(Bytecodes::_invokevirtual) && is_vfinal(); |
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// fall through |
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case Bytecodes::_invokestatic: |
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set_f1(method()); |
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byte_no = 1; |
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break; |
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default: |
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ShouldNotReachHere(); |
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break; |
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} |
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set_flags(as_flags(as_TosState(method->result_type()), |
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method->is_final_method(), |
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needs_vfinal_flag, |
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false, |
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change_to_virtual, |
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true)| |
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method()->size_of_parameters()); |
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// Note: byte_no also appears in TemplateTable::resolve. |
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if (byte_no == 1) { |
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set_bytecode_1(invoke_code); |
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} else if (byte_no == 2) { |
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if (change_to_virtual) { |
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// NOTE: THIS IS A HACK - BE VERY CAREFUL!!! |
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// |
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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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set_bytecode_2(Bytecodes::_invokevirtual); |
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} else { |
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set_bytecode_2(invoke_code); |
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} |
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} else { |
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ShouldNotReachHere(); |
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} |
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NOT_PRODUCT(verify(tty)); |
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} |
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void ConstantPoolCacheEntry::set_interface_call(methodHandle method, int index) { |
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klassOop interf = method->method_holder(); |
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assert(instanceKlass::cast(interf)->is_interface(), "must be an interface"); |
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set_f1(interf); |
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set_f2(index); |
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set_flags(as_flags(as_TosState(method->result_type()), method->is_final_method(), false, false, false, true) | method()->size_of_parameters()); |
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set_bytecode_1(Bytecodes::_invokeinterface); |
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} |
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void ConstantPoolCacheEntry::set_dynamic_call(Handle call_site, int extra_data) { |
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methodOop method = (methodOop) sun_dyn_CallSiteImpl::vmmethod(call_site()); |
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assert(method->is_method(), "must be initialized properly"); |
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int param_size = method->size_of_parameters(); |
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assert(param_size > 1, "method argument size must include MH.this & initial dynamic receiver"); |
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param_size -= 1; // do not count MH.this; it is not stacked for invokedynamic |
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if (Atomic::cmpxchg_ptr(call_site(), &_f1, NULL) == NULL) { |
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// racing threads might be trying to install their own favorites |
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set_f1(call_site()); |
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} |
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set_f2(extra_data); |
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set_flags(as_flags(as_TosState(method->result_type()), method->is_final_method(), false, false, false, true) | param_size); |
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// do not do set_bytecode on a secondary CP cache entry |
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//set_bytecode_1(Bytecodes::_invokedynamic); |
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} |
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class LocalOopClosure: public OopClosure { |
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private: |
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void (*_f)(oop*); |
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public: |
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LocalOopClosure(void f(oop*)) { _f = f; } |
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virtual void do_oop(oop* o) { _f(o); } |
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virtual void do_oop(narrowOop *o) { ShouldNotReachHere(); } |
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}; |
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void ConstantPoolCacheEntry::oops_do(void f(oop*)) { |
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LocalOopClosure blk(f); |
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oop_iterate(&blk); |
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} |
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void ConstantPoolCacheEntry::oop_iterate(OopClosure* blk) { |
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assert(in_words(size()) == 4, "check code below - may need adjustment"); |
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// field[1] is always oop or NULL |
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blk->do_oop((oop*)&_f1); |
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if (is_vfinal()) { |
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blk->do_oop((oop*)&_f2); |
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} |
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} |
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267 |
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void ConstantPoolCacheEntry::oop_iterate_m(OopClosure* blk, MemRegion mr) { |
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assert(in_words(size()) == 4, "check code below - may need adjustment"); |
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// field[1] is always oop or NULL |
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if (mr.contains((oop *)&_f1)) blk->do_oop((oop*)&_f1); |
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if (is_vfinal()) { |
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if (mr.contains((oop *)&_f2)) blk->do_oop((oop*)&_f2); |
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} |
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} |
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279 |
void ConstantPoolCacheEntry::follow_contents() { |
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assert(in_words(size()) == 4, "check code below - may need adjustment"); |
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// field[1] is always oop or NULL |
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MarkSweep::mark_and_push((oop*)&_f1); |
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283 |
if (is_vfinal()) { |
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284 |
MarkSweep::mark_and_push((oop*)&_f2); |
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285 |
} |
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286 |
} |
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287 |
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288 |
#ifndef SERIALGC |
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289 |
void ConstantPoolCacheEntry::follow_contents(ParCompactionManager* cm) { |
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290 |
assert(in_words(size()) == 4, "check code below - may need adjustment"); |
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// field[1] is always oop or NULL |
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292 |
PSParallelCompact::mark_and_push(cm, (oop*)&_f1); |
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293 |
if (is_vfinal()) { |
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294 |
PSParallelCompact::mark_and_push(cm, (oop*)&_f2); |
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295 |
} |
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296 |
} |
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297 |
#endif // SERIALGC |
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298 |
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299 |
void ConstantPoolCacheEntry::adjust_pointers() { |
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300 |
assert(in_words(size()) == 4, "check code below - may need adjustment"); |
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301 |
// field[1] is always oop or NULL |
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302 |
MarkSweep::adjust_pointer((oop*)&_f1); |
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303 |
if (is_vfinal()) { |
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304 |
MarkSweep::adjust_pointer((oop*)&_f2); |
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305 |
} |
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306 |
} |
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307 |
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308 |
#ifndef SERIALGC |
|
309 |
void ConstantPoolCacheEntry::update_pointers() { |
|
310 |
assert(in_words(size()) == 4, "check code below - may need adjustment"); |
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311 |
// field[1] is always oop or NULL |
|
312 |
PSParallelCompact::adjust_pointer((oop*)&_f1); |
|
313 |
if (is_vfinal()) { |
|
314 |
PSParallelCompact::adjust_pointer((oop*)&_f2); |
|
315 |
} |
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316 |
} |
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317 |
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318 |
void ConstantPoolCacheEntry::update_pointers(HeapWord* beg_addr, |
|
319 |
HeapWord* end_addr) { |
|
320 |
assert(in_words(size()) == 4, "check code below - may need adjustment"); |
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321 |
// field[1] is always oop or NULL |
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322 |
PSParallelCompact::adjust_pointer((oop*)&_f1, beg_addr, end_addr); |
|
323 |
if (is_vfinal()) { |
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324 |
PSParallelCompact::adjust_pointer((oop*)&_f2, beg_addr, end_addr); |
|
325 |
} |
|
326 |
} |
|
327 |
#endif // SERIALGC |
|
328 |
||
329 |
// RedefineClasses() API support: |
|
330 |
// If this constantPoolCacheEntry refers to old_method then update it |
|
331 |
// to refer to new_method. |
|
332 |
bool ConstantPoolCacheEntry::adjust_method_entry(methodOop old_method, |
|
333 |
methodOop new_method, bool * trace_name_printed) { |
|
334 |
||
335 |
if (is_vfinal()) { |
|
336 |
// virtual and final so f2() contains method ptr instead of vtable index |
|
337 |
if (f2() == (intptr_t)old_method) { |
|
338 |
// match old_method so need an update |
|
339 |
_f2 = (intptr_t)new_method; |
|
340 |
if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) { |
|
341 |
if (!(*trace_name_printed)) { |
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342 |
// RC_TRACE_MESG macro has an embedded ResourceMark |
|
343 |
RC_TRACE_MESG(("adjust: name=%s", |
|
344 |
Klass::cast(old_method->method_holder())->external_name())); |
|
345 |
*trace_name_printed = true; |
|
346 |
} |
|
347 |
// RC_TRACE macro has an embedded ResourceMark |
|
348 |
RC_TRACE(0x00400000, ("cpc vf-entry update: %s(%s)", |
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349 |
new_method->name()->as_C_string(), |
|
350 |
new_method->signature()->as_C_string())); |
|
351 |
} |
|
352 |
||
353 |
return true; |
|
354 |
} |
|
355 |
||
356 |
// f1() is not used with virtual entries so bail out |
|
357 |
return false; |
|
358 |
} |
|
359 |
||
360 |
if ((oop)_f1 == NULL) { |
|
361 |
// NULL f1() means this is a virtual entry so bail out |
|
362 |
// We are assuming that the vtable index does not need change. |
|
363 |
return false; |
|
364 |
} |
|
365 |
||
366 |
if ((oop)_f1 == old_method) { |
|
367 |
_f1 = new_method; |
|
368 |
if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) { |
|
369 |
if (!(*trace_name_printed)) { |
|
370 |
// RC_TRACE_MESG macro has an embedded ResourceMark |
|
371 |
RC_TRACE_MESG(("adjust: name=%s", |
|
372 |
Klass::cast(old_method->method_holder())->external_name())); |
|
373 |
*trace_name_printed = true; |
|
374 |
} |
|
375 |
// RC_TRACE macro has an embedded ResourceMark |
|
376 |
RC_TRACE(0x00400000, ("cpc entry update: %s(%s)", |
|
377 |
new_method->name()->as_C_string(), |
|
378 |
new_method->signature()->as_C_string())); |
|
379 |
} |
|
380 |
||
381 |
return true; |
|
382 |
} |
|
383 |
||
384 |
return false; |
|
385 |
} |
|
386 |
||
387 |
bool ConstantPoolCacheEntry::is_interesting_method_entry(klassOop k) { |
|
388 |
if (!is_method_entry()) { |
|
389 |
// not a method entry so not interesting by default |
|
390 |
return false; |
|
391 |
} |
|
392 |
||
393 |
methodOop m = NULL; |
|
394 |
if (is_vfinal()) { |
|
395 |
// virtual and final so _f2 contains method ptr instead of vtable index |
|
396 |
m = (methodOop)_f2; |
|
397 |
} else if ((oop)_f1 == NULL) { |
|
398 |
// NULL _f1 means this is a virtual entry so also not interesting |
|
399 |
return false; |
|
400 |
} else { |
|
401 |
if (!((oop)_f1)->is_method()) { |
|
402 |
// _f1 can also contain a klassOop for an interface |
|
403 |
return false; |
|
404 |
} |
|
405 |
m = (methodOop)_f1; |
|
406 |
} |
|
407 |
||
408 |
assert(m != NULL && m->is_method(), "sanity check"); |
|
409 |
if (m == NULL || !m->is_method() || m->method_holder() != k) { |
|
410 |
// robustness for above sanity checks or method is not in |
|
411 |
// the interesting class |
|
412 |
return false; |
|
413 |
} |
|
414 |
||
415 |
// the method is in the interesting class so the entry is interesting |
|
416 |
return true; |
|
417 |
} |
|
418 |
||
419 |
void ConstantPoolCacheEntry::print(outputStream* st, int index) const { |
|
420 |
// print separator |
|
421 |
if (index == 0) tty->print_cr(" -------------"); |
|
422 |
// print entry |
|
2570
ecc7862946d4
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
670
diff
changeset
|
423 |
tty->print_cr("%3d (%08x) ", index, this); |
ecc7862946d4
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
670
diff
changeset
|
424 |
if (is_secondary_entry()) |
ecc7862946d4
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
670
diff
changeset
|
425 |
tty->print_cr("[%5d|secondary]", main_entry_index()); |
ecc7862946d4
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
670
diff
changeset
|
426 |
else |
ecc7862946d4
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
670
diff
changeset
|
427 |
tty->print_cr("[%02x|%02x|%5d]", bytecode_2(), bytecode_1(), constant_pool_index()); |
1 | 428 |
tty->print_cr(" [ %08x]", (address)(oop)_f1); |
429 |
tty->print_cr(" [ %08x]", _f2); |
|
430 |
tty->print_cr(" [ %08x]", _flags); |
|
431 |
tty->print_cr(" -------------"); |
|
432 |
} |
|
433 |
||
434 |
void ConstantPoolCacheEntry::verify(outputStream* st) const { |
|
435 |
// not implemented yet |
|
436 |
} |
|
437 |
||
438 |
// Implementation of ConstantPoolCache |
|
439 |
||
440 |
void constantPoolCacheOopDesc::initialize(intArray& inverse_index_map) { |
|
441 |
assert(inverse_index_map.length() == length(), "inverse index map must have same length as cache"); |
|
442 |
for (int i = 0; i < length(); i++) entry_at(i)->set_initial_state(inverse_index_map[i]); |
|
443 |
} |
|
444 |
||
445 |
// RedefineClasses() API support: |
|
446 |
// If any entry of this constantPoolCache points to any of |
|
447 |
// old_methods, replace it with the corresponding new_method. |
|
448 |
void constantPoolCacheOopDesc::adjust_method_entries(methodOop* old_methods, methodOop* new_methods, |
|
449 |
int methods_length, bool * trace_name_printed) { |
|
450 |
||
451 |
if (methods_length == 0) { |
|
452 |
// nothing to do if there are no methods |
|
453 |
return; |
|
454 |
} |
|
455 |
||
456 |
// get shorthand for the interesting class |
|
457 |
klassOop old_holder = old_methods[0]->method_holder(); |
|
458 |
||
459 |
for (int i = 0; i < length(); i++) { |
|
460 |
if (!entry_at(i)->is_interesting_method_entry(old_holder)) { |
|
461 |
// skip uninteresting methods |
|
462 |
continue; |
|
463 |
} |
|
464 |
||
465 |
// The constantPoolCache contains entries for several different |
|
466 |
// things, but we only care about methods. In fact, we only care |
|
467 |
// about methods in the same class as the one that contains the |
|
468 |
// old_methods. At this point, we have an interesting entry. |
|
469 |
||
470 |
for (int j = 0; j < methods_length; j++) { |
|
471 |
methodOop old_method = old_methods[j]; |
|
472 |
methodOop new_method = new_methods[j]; |
|
473 |
||
474 |
if (entry_at(i)->adjust_method_entry(old_method, new_method, |
|
475 |
trace_name_printed)) { |
|
476 |
// current old_method matched this entry and we updated it so |
|
477 |
// break out and get to the next interesting entry if there one |
|
478 |
break; |
|
479 |
} |
|
480 |
} |
|
481 |
} |
|
482 |
} |