author | xdono |
Tue, 28 Jul 2009 12:12:40 -0700 | |
changeset 3261 | c7d5aae8d3f7 |
parent 2570 | ecc7862946d4 |
child 4564 | 55dfb20908d0 |
permissions | -rw-r--r-- |
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/* |
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* Copyright 1997-2009 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/_bytecode.cpp.incl" |
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// Implementation of Bytecode |
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// Should eventually get rid of these functions and use ThisRelativeObj methods instead |
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void Bytecode::set_code(Bytecodes::Code code) { |
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Bytecodes::check(code); |
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*addr_at(0) = u_char(code); |
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} |
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bool Bytecode::check_must_rewrite() const { |
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assert(Bytecodes::can_rewrite(code()), "post-check only"); |
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// Some codes are conditionally rewriting. Look closely at them. |
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switch (code()) { |
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case Bytecodes::_aload_0: |
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// Even if RewriteFrequentPairs is turned on, |
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// the _aload_0 code might delay its rewrite until |
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// a following _getfield rewrites itself. |
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return false; |
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case Bytecodes::_lookupswitch: |
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return false; // the rewrite is not done by the interpreter |
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case Bytecodes::_new: |
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// (Could actually look at the class here, but the profit would be small.) |
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return false; // the rewrite is not always done |
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} |
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// No other special cases. |
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return true; |
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} |
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// Implementation of Bytecode_tableupswitch |
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int Bytecode_tableswitch::dest_offset_at(int i) const { |
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address x = aligned_addr_at(1); |
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int x2 = aligned_offset(1 + (3 + i)*jintSize); |
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int val = java_signed_word_at(x2); |
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return java_signed_word_at(aligned_offset(1 + (3 + i)*jintSize)); |
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} |
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// Implementation of Bytecode_invoke |
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void Bytecode_invoke::verify() const { |
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Bytecodes::Code bc = adjusted_invoke_code(); |
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assert(is_valid(), "check invoke"); |
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} |
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symbolOop Bytecode_invoke::signature() const { |
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constantPoolOop constants = method()->constants(); |
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return constants->signature_ref_at(index()); |
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} |
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symbolOop Bytecode_invoke::name() const { |
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constantPoolOop constants = method()->constants(); |
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return constants->name_ref_at(index()); |
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} |
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BasicType Bytecode_invoke::result_type(Thread *thread) const { |
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symbolHandle sh(thread, signature()); |
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ResultTypeFinder rts(sh); |
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rts.iterate(); |
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return rts.type(); |
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} |
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methodHandle Bytecode_invoke::static_target(TRAPS) { |
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methodHandle m; |
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KlassHandle resolved_klass; |
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constantPoolHandle constants(THREAD, _method->constants()); |
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if (adjusted_invoke_code() != Bytecodes::_invokeinterface) { |
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LinkResolver::resolve_method(m, resolved_klass, constants, index(), CHECK_(methodHandle())); |
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} else { |
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LinkResolver::resolve_interface_method(m, resolved_klass, constants, index(), CHECK_(methodHandle())); |
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} |
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return m; |
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} |
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int Bytecode_invoke::index() const { |
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2570
ecc7862946d4
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
1
diff
changeset
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// Note: Rewriter::rewrite changes the Java_u2 of an invokedynamic to a native_u4, |
ecc7862946d4
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
1
diff
changeset
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// at the same time it allocates per-call-site CP cache entries. |
ecc7862946d4
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
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if (has_giant_index()) |
ecc7862946d4
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
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return Bytes::get_native_u4(bcp() + 1); |
ecc7862946d4
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
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else |
ecc7862946d4
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return Bytes::get_Java_u2(bcp() + 1); |
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} |
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// Implementation of Bytecode_static |
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void Bytecode_static::verify() const { |
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assert(Bytecodes::java_code(code()) == Bytecodes::_putstatic |
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|| Bytecodes::java_code(code()) == Bytecodes::_getstatic, "check static"); |
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} |
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BasicType Bytecode_static::result_type(methodOop method) const { |
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int index = java_hwrd_at(1); |
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constantPoolOop constants = method->constants(); |
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symbolOop field_type = constants->signature_ref_at(index); |
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BasicType basic_type = FieldType::basic_type(field_type); |
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return basic_type; |
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} |
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// Implementation of Bytecode_field |
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void Bytecode_field::verify() const { |
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Bytecodes::Code stdc = Bytecodes::java_code(code()); |
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assert(stdc == Bytecodes::_putstatic || stdc == Bytecodes::_getstatic || |
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stdc == Bytecodes::_putfield || stdc == Bytecodes::_getfield, "check field"); |
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} |
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bool Bytecode_field::is_static() const { |
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Bytecodes::Code stdc = Bytecodes::java_code(code()); |
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return stdc == Bytecodes::_putstatic || stdc == Bytecodes::_getstatic; |
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} |
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int Bytecode_field::index() const { |
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return java_hwrd_at(1); |
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} |
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// Implementation of Bytecodes loac constant |
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int Bytecode_loadconstant::index() const { |
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Bytecodes::Code stdc = Bytecodes::java_code(code()); |
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return stdc == Bytecodes::_ldc ? java_byte_at(1) : java_hwrd_at(1); |
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} |
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//------------------------------------------------------------------------------ |
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// Non-product code |
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#ifndef PRODUCT |
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void Bytecode_lookupswitch::verify() const { |
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switch (Bytecodes::java_code(code())) { |
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case Bytecodes::_lookupswitch: |
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{ int i = number_of_pairs() - 1; |
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while (i-- > 0) { |
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assert(pair_at(i)->match() < pair_at(i+1)->match(), "unsorted table entries"); |
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} |
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} |
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break; |
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default: |
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fatal("not a lookupswitch bytecode"); |
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} |
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} |
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void Bytecode_tableswitch::verify() const { |
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switch (Bytecodes::java_code(code())) { |
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case Bytecodes::_tableswitch: |
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{ int lo = low_key(); |
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int hi = high_key(); |
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assert (hi >= lo, "incorrect hi/lo values in tableswitch"); |
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int i = hi - lo - 1 ; |
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while (i-- > 0) { |
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// no special check needed |
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} |
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} |
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break; |
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default: |
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fatal("not a tableswitch bytecode"); |
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} |
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} |
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#endif |