author | coleenp |
Wed, 13 Nov 2019 08:23:23 -0500 | |
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parent 58861 | 2c3cc4b01880 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1997, 2019, 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 "interpreter/bytecode.inline.hpp" |
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#include "interpreter/linkResolver.hpp" |
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#include "oops/constantPool.hpp" |
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#include "oops/cpCache.inline.hpp" |
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#include "oops/oop.inline.hpp" |
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#include "runtime/fieldType.hpp" |
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#include "runtime/handles.inline.hpp" |
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#include "runtime/safepoint.hpp" |
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#include "runtime/signature.hpp" |
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// Implementation of Bytecode |
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#ifdef ASSERT |
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void Bytecode::assert_same_format_as(Bytecodes::Code testbc, bool is_wide) const { |
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Bytecodes::Code thisbc = Bytecodes::cast(byte_at(0)); |
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if (thisbc == Bytecodes::_breakpoint) return; // let the assertion fail silently |
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if (is_wide) { |
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assert(thisbc == Bytecodes::_wide, "expected a wide instruction"); |
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thisbc = Bytecodes::cast(byte_at(1)); |
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if (thisbc == Bytecodes::_breakpoint) return; |
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} |
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int thisflags = Bytecodes::flags(testbc, is_wide) & Bytecodes::_all_fmt_bits; |
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int testflags = Bytecodes::flags(thisbc, is_wide) & Bytecodes::_all_fmt_bits; |
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if (thisflags != testflags) |
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tty->print_cr("assert_same_format_as(%d) failed on bc=%d%s; %d != %d", |
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(int)testbc, (int)thisbc, (is_wide?"/wide":""), testflags, thisflags); |
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assert(thisflags == testflags, "expected format"); |
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} |
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void Bytecode::assert_index_size(int size, Bytecodes::Code bc, bool is_wide) { |
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int have_fmt = (Bytecodes::flags(bc, is_wide) |
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& (Bytecodes::_fmt_has_u2 | Bytecodes::_fmt_has_u4 | |
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Bytecodes::_fmt_not_simple | |
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// Not an offset field: |
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Bytecodes::_fmt_has_o)); |
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int need_fmt = -1; |
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switch (size) { |
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case 1: need_fmt = 0; break; |
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case 2: need_fmt = Bytecodes::_fmt_has_u2; break; |
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case 4: need_fmt = Bytecodes::_fmt_has_u4; break; |
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} |
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if (is_wide) need_fmt |= Bytecodes::_fmt_not_simple; |
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if (have_fmt != need_fmt) { |
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tty->print_cr("assert_index_size %d: bc=%d%s %d != %d", size, bc, (is_wide?"/wide":""), have_fmt, need_fmt); |
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assert(have_fmt == need_fmt, "assert_index_size"); |
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} |
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} |
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void Bytecode::assert_offset_size(int size, Bytecodes::Code bc, bool is_wide) { |
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int have_fmt = Bytecodes::flags(bc, is_wide) & Bytecodes::_all_fmt_bits; |
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int need_fmt = -1; |
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switch (size) { |
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case 2: need_fmt = Bytecodes::_fmt_bo2; break; |
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case 4: need_fmt = Bytecodes::_fmt_bo4; break; |
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} |
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if (is_wide) need_fmt |= Bytecodes::_fmt_not_simple; |
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if (have_fmt != need_fmt) { |
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tty->print_cr("assert_offset_size %d: bc=%d%s %d != %d", size, bc, (is_wide?"/wide":""), have_fmt, need_fmt); |
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assert(have_fmt == need_fmt, "assert_offset_size"); |
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} |
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} |
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void Bytecode::assert_constant_size(int size, int where, Bytecodes::Code bc, bool is_wide) { |
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int have_fmt = Bytecodes::flags(bc, is_wide) & (Bytecodes::_all_fmt_bits |
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// Ignore any 'i' field (for iinc): |
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& ~Bytecodes::_fmt_has_i); |
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int need_fmt = -1; |
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switch (size) { |
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case 1: need_fmt = Bytecodes::_fmt_bc; break; |
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case 2: need_fmt = Bytecodes::_fmt_bc | Bytecodes::_fmt_has_u2; break; |
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} |
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if (is_wide) need_fmt |= Bytecodes::_fmt_not_simple; |
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int length = is_wide ? Bytecodes::wide_length_for(bc) : Bytecodes::length_for(bc); |
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if (have_fmt != need_fmt || where + size != length) { |
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tty->print_cr("assert_constant_size %d @%d: bc=%d%s %d != %d", size, where, bc, (is_wide?"/wide":""), have_fmt, need_fmt); |
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} |
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assert(have_fmt == need_fmt, "assert_constant_size"); |
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assert(where + size == length, "assert_constant_size oob"); |
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} |
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void Bytecode::assert_native_index(Bytecodes::Code bc, bool is_wide) { |
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assert((Bytecodes::flags(bc, is_wide) & Bytecodes::_fmt_has_nbo) != 0, "native index"); |
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} |
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#endif //ASSERT |
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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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return get_aligned_Java_u4_at(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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assert(is_valid(), "check invoke"); |
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assert(cpcache() != NULL, "do not call this from verifier or rewriter"); |
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} |
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int Bytecode_invoke::size_of_parameters() const { |
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ArgumentSizeComputer asc(signature()); |
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return asc.size() + (has_receiver() ? 1 : 0); |
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} |
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Symbol* Bytecode_member_ref::klass() const { |
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return constants()->klass_ref_at_noresolve(index()); |
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} |
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Symbol* Bytecode_member_ref::name() const { |
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return constants()->name_ref_at(index()); |
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} |
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Symbol* Bytecode_member_ref::signature() const { |
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return constants()->signature_ref_at(index()); |
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} |
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BasicType Bytecode_member_ref::result_type() const { |
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ResultTypeFinder rts(signature()); |
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return rts.type(); |
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} |
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Method* Bytecode_invoke::static_target(TRAPS) { |
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constantPoolHandle constants(THREAD, this->constants()); |
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Bytecodes::Code bc = invoke_code(); |
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return LinkResolver::resolve_method_statically(bc, constants, index(), THREAD); |
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} |
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Handle Bytecode_invoke::appendix(TRAPS) { |
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ConstantPoolCacheEntry* cpce = cpcache_entry(); |
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if (cpce->has_appendix()) { |
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constantPoolHandle cp(THREAD, constants()); |
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return Handle(THREAD, cpce->appendix_if_resolved(cp)); |
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} |
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return Handle(); // usual case |
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} |
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int Bytecode_member_ref::index() const { |
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// Note: Rewriter::rewrite changes the Java_u2 of an invokedynamic to a native_u4, |
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// at the same time it allocates per-call-site CP cache entries. |
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Bytecodes::Code rawc = code(); |
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if (has_index_u4(rawc)) |
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return get_index_u4(rawc); |
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else |
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return get_index_u2_cpcache(rawc); |
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} |
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int Bytecode_member_ref::pool_index() const { |
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return cpcache_entry()->constant_pool_index(); |
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} |
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ConstantPoolCacheEntry* Bytecode_member_ref::cpcache_entry() const { |
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int index = this->index(); |
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return cpcache()->entry_at(ConstantPool::decode_cpcache_index(index, true)); |
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} |
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// Implementation of Bytecode_field |
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190 |
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191 |
void Bytecode_field::verify() const { |
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5882 | 192 |
assert(is_valid(), "check field"); |
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} |
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195 |
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5882 | 196 |
// Implementation of Bytecode_loadconstant |
197 |
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198 |
int Bytecode_loadconstant::raw_index() const { |
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7913 | 199 |
Bytecodes::Code rawc = code(); |
5882 | 200 |
assert(rawc != Bytecodes::_wide, "verifier prevents this"); |
201 |
if (Bytecodes::java_code(rawc) == Bytecodes::_ldc) |
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7913 | 202 |
return get_index_u1(rawc); |
5882 | 203 |
else |
7913 | 204 |
return get_index_u2(rawc, false); |
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} |
206 |
||
5882 | 207 |
int Bytecode_loadconstant::pool_index() const { |
208 |
int index = raw_index(); |
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if (has_cache_index()) { |
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return _method->constants()->object_to_cp_index(index); |
5882 | 211 |
} |
212 |
return index; |
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213 |
} |
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1 | 214 |
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5882 | 215 |
BasicType Bytecode_loadconstant::result_type() const { |
216 |
int index = pool_index(); |
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48826 | 217 |
return _method->constants()->basic_type_for_constant_at(index); |
5882 | 218 |
} |
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220 |
oop Bytecode_loadconstant::resolve_constant(TRAPS) const { |
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assert(_method != NULL, "must supply method to resolve constant"); |
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int index = raw_index(); |
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ConstantPool* constants = _method->constants(); |
5882 | 224 |
if (has_cache_index()) { |
225 |
return constants->resolve_cached_constant_at(index, THREAD); |
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48826 | 226 |
} else if (_method->constants()->tag_at(index).is_dynamic_constant()) { |
227 |
return constants->resolve_possibly_cached_constant_at(index, THREAD); |
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5882 | 228 |
} else { |
229 |
return constants->resolve_constant_at(index, THREAD); |
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5697 | 230 |
} |
1 | 231 |
} |
232 |
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233 |
//------------------------------------------------------------------------------ |
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234 |
// Non-product code |
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235 |
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236 |
#ifndef PRODUCT |
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237 |
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238 |
void Bytecode_lookupswitch::verify() const { |
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239 |
switch (Bytecodes::java_code(code())) { |
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240 |
case Bytecodes::_lookupswitch: |
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241 |
{ int i = number_of_pairs() - 1; |
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242 |
while (i-- > 0) { |
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7913 | 243 |
assert(pair_at(i).match() < pair_at(i+1).match(), "unsorted table entries"); |
1 | 244 |
} |
245 |
} |
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246 |
break; |
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247 |
default: |
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248 |
fatal("not a lookupswitch bytecode"); |
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249 |
} |
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250 |
} |
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251 |
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252 |
void Bytecode_tableswitch::verify() const { |
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253 |
switch (Bytecodes::java_code(code())) { |
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254 |
case Bytecodes::_tableswitch: |
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255 |
{ int lo = low_key(); |
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256 |
int hi = high_key(); |
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257 |
assert (hi >= lo, "incorrect hi/lo values in tableswitch"); |
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258 |
int i = hi - lo - 1 ; |
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259 |
while (i-- > 0) { |
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260 |
// no special check needed |
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261 |
} |
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262 |
} |
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263 |
break; |
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264 |
default: |
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265 |
fatal("not a tableswitch bytecode"); |
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266 |
} |
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267 |
} |
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268 |
||
269 |
#endif |