author | psandoz |
Mon, 02 Jul 2018 10:09:01 -0700 | |
changeset 50971 | 34872a21af82 |
parent 49449 | ef5d5d343e2a |
child 53546 | 63eb7e38ce84 |
permissions | -rw-r--r-- |
1 | 1 |
/* |
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* Copyright (c) 1999, 2018, 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 "ci/ciCallSite.hpp" |
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#include "ci/ciConstant.hpp" |
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#include "ci/ciField.hpp" |
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#include "ci/ciStreams.hpp" |
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#include "ci/ciUtilities.inline.hpp" |
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#include "runtime/handles.inline.hpp" |
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// ciExceptionHandlerStream |
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// |
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// Walk over some selected set of a methods exception handlers. |
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||
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// ------------------------------------------------------------------ |
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// ciExceptionHandlerStream::count |
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// |
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// How many exception handlers are there in this stream? |
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// |
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// Implementation note: Compiler2 needs this functionality, so I had |
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int ciExceptionHandlerStream::count() { |
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int save_pos = _pos; |
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int save_end = _end; |
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int count = 0; |
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_pos = -1; |
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_end = _method->_handler_count; |
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||
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next(); |
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while (!is_done()) { |
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count++; |
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next(); |
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} |
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_pos = save_pos; |
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_end = save_end; |
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return count; |
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} |
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int ciExceptionHandlerStream::count_remaining() { |
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int save_pos = _pos; |
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int save_end = _end; |
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int count = 0; |
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while (!is_done()) { |
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count++; |
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next(); |
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} |
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_pos = save_pos; |
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_end = save_end; |
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return count; |
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} |
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||
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// ciBytecodeStream |
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// |
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// The class is used to iterate over the bytecodes of a method. |
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// It hides the details of constant pool structure/access by |
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// providing accessors for constant pool items. |
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// ------------------------------------------------------------------ |
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// ciBytecodeStream::next_wide_or_table |
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// |
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// Special handling for switch ops |
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Bytecodes::Code ciBytecodeStream::next_wide_or_table(Bytecodes::Code bc) { |
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switch (bc) { // Check for special bytecode handling |
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case Bytecodes::_wide: |
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// Special handling for the wide bytcode |
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// Get following bytecode; do not return wide |
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assert(Bytecodes::Code(_pc[0]) == Bytecodes::_wide, ""); |
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bc = Bytecodes::java_code(_raw_bc = (Bytecodes::Code)_pc[1]); |
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assert(Bytecodes::wide_length_for(bc) > 2, "must make progress"); |
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_pc += Bytecodes::wide_length_for(bc); |
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_was_wide = _pc; // Flag last wide bytecode found |
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assert(is_wide(), "accessor works right"); |
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break; |
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case Bytecodes::_lookupswitch: |
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_pc++; // Skip wide bytecode |
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_pc += (_start-_pc)&3; // Word align |
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_table_base = (jint*)_pc; // Capture for later usage |
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// table_base[0] is default far_dest |
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// Table has 2 lead elements (default, length), then pairs of u4 values. |
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// So load table length, and compute address at end of table |
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_pc = (address)&_table_base[2+ 2*Bytes::get_Java_u4((address)&_table_base[1])]; |
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break; |
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case Bytecodes::_tableswitch: { |
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_pc++; // Skip wide bytecode |
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_pc += (_start-_pc)&3; // Word align |
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_table_base = (jint*)_pc; // Capture for later usage |
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// table_base[0] is default far_dest |
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int lo = Bytes::get_Java_u4((address)&_table_base[1]);// Low bound |
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int hi = Bytes::get_Java_u4((address)&_table_base[2]);// High bound |
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int len = hi - lo + 1; // Dense table size |
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_pc = (address)&_table_base[3+len]; // Skip past table |
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break; |
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} |
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default: |
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fatal("unhandled bytecode"); |
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} |
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return bc; |
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} |
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// ------------------------------------------------------------------ |
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// ciBytecodeStream::reset_to_bci |
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void ciBytecodeStream::reset_to_bci( int bci ) { |
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_bc_start=_was_wide=0; |
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_pc = _start+bci; |
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} |
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// ------------------------------------------------------------------ |
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// ciBytecodeStream::force_bci |
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void ciBytecodeStream::force_bci(int bci) { |
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if (bci < 0) { |
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reset_to_bci(0); |
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_bc_start = _start + bci; |
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_bc = EOBC(); |
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} else { |
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reset_to_bci(bci); |
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next(); |
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} |
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} |
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// ------------------------------------------------------------------ |
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// Constant pool access |
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// ------------------------------------------------------------------ |
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// ------------------------------------------------------------------ |
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// ciBytecodeStream::get_klass_index |
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// |
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// If this bytecodes references a klass, return the index of the |
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// referenced klass. |
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int ciBytecodeStream::get_klass_index() const { |
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switch(cur_bc()) { |
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case Bytecodes::_ldc: |
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return get_index_u1(); |
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case Bytecodes::_ldc_w: |
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case Bytecodes::_ldc2_w: |
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case Bytecodes::_checkcast: |
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case Bytecodes::_instanceof: |
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case Bytecodes::_anewarray: |
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case Bytecodes::_multianewarray: |
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case Bytecodes::_new: |
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case Bytecodes::_newarray: |
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return get_index_u2(); |
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default: |
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ShouldNotReachHere(); |
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return 0; |
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} |
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} |
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// ------------------------------------------------------------------ |
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// ciBytecodeStream::get_klass |
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// |
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// If this bytecode is a new, newarray, multianewarray, instanceof, |
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// or checkcast, get the referenced klass. |
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ciKlass* ciBytecodeStream::get_klass(bool& will_link) { |
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VM_ENTRY_MARK; |
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constantPoolHandle cpool(_method->get_Method()->constants()); |
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return CURRENT_ENV->get_klass_by_index(cpool, get_klass_index(), will_link, _holder); |
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} |
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// ------------------------------------------------------------------ |
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// ciBytecodeStream::get_constant_raw_index |
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// |
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// If this bytecode is one of the ldc variants, get the index of the |
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// referenced constant. |
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int ciBytecodeStream::get_constant_raw_index() const { |
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// work-alike for Bytecode_loadconstant::raw_index() |
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switch (cur_bc()) { |
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case Bytecodes::_ldc: |
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return get_index_u1(); |
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case Bytecodes::_ldc_w: |
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case Bytecodes::_ldc2_w: |
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return get_index_u2(); |
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default: |
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ShouldNotReachHere(); |
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return 0; |
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} |
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} |
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// ------------------------------------------------------------------ |
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// ciBytecodeStream::get_constant_pool_index |
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// Decode any reference index into a regular pool index. |
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int ciBytecodeStream::get_constant_pool_index() const { |
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// work-alike for Bytecode_loadconstant::pool_index() |
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int index = get_constant_raw_index(); |
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if (has_cache_index()) { |
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VM_ENTRY_MARK; |
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constantPoolHandle cpool(_method->get_Method()->constants()); |
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return cpool->object_to_cp_index(index); |
5882 | 222 |
} |
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return index; |
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} |
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// ------------------------------------------------------------------ |
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// ciBytecodeStream::get_constant_cache_index |
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// Return the CP cache index, or -1 if there isn't any. |
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int ciBytecodeStream::get_constant_cache_index() const { |
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// work-alike for Bytecode_loadconstant::cache_index() |
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return has_cache_index() ? get_constant_raw_index() : -1; |
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} |
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// ------------------------------------------------------------------ |
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// ciBytecodeStream::get_constant |
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// |
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// If this bytecode is one of the ldc variants, get the referenced |
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// constant. |
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ciConstant ciBytecodeStream::get_constant() { |
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5882 | 240 |
int pool_index = get_constant_raw_index(); |
241 |
int cache_index = -1; |
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if (has_cache_index()) { |
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cache_index = pool_index; |
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pool_index = -1; |
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} |
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VM_ENTRY_MARK; |
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constantPoolHandle cpool(_method->get_Method()->constants()); |
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return CURRENT_ENV->get_constant_by_index(cpool, pool_index, cache_index, _holder); |
1 | 249 |
} |
250 |
||
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// ------------------------------------------------------------------ |
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5882 | 252 |
// ciBytecodeStream::get_constant_pool_tag |
253 |
// |
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254 |
// If this bytecode is one of the ldc variants, get the referenced |
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// constant. |
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constantTag ciBytecodeStream::get_constant_pool_tag(int index) const { |
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VM_ENTRY_MARK; |
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return _method->get_Method()->constants()->constant_tag_at(index); |
1 | 259 |
} |
260 |
||
261 |
// ------------------------------------------------------------------ |
|
262 |
// ciBytecodeStream::get_field_index |
|
263 |
// |
|
264 |
// If this is a field access bytecode, get the constant pool |
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265 |
// index of the referenced field. |
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266 |
int ciBytecodeStream::get_field_index() { |
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267 |
assert(cur_bc() == Bytecodes::_getfield || |
|
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cur_bc() == Bytecodes::_putfield || |
|
269 |
cur_bc() == Bytecodes::_getstatic || |
|
270 |
cur_bc() == Bytecodes::_putstatic, "wrong bc"); |
|
5688 | 271 |
return get_index_u2_cpcache(); |
1 | 272 |
} |
273 |
||
274 |
||
275 |
// ------------------------------------------------------------------ |
|
276 |
// ciBytecodeStream::get_field |
|
277 |
// |
|
278 |
// If this bytecode is one of get_field, get_static, put_field, |
|
279 |
// or put_static, get the referenced field. |
|
280 |
ciField* ciBytecodeStream::get_field(bool& will_link) { |
|
281 |
ciField* f = CURRENT_ENV->get_field_by_index(_holder, get_field_index()); |
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will_link = f->will_link(_method, _bc); |
1 | 283 |
return f; |
284 |
} |
|
285 |
||
286 |
||
287 |
// ------------------------------------------------------------------ |
|
288 |
// ciBytecodeStream::get_declared_field_holder |
|
289 |
// |
|
290 |
// Get the declared holder of the currently referenced field. |
|
291 |
// |
|
292 |
// Usage note: the holder() of a ciField class returns the canonical |
|
293 |
// holder of the field, rather than the holder declared in the |
|
294 |
// bytecodes. |
|
295 |
// |
|
296 |
// There is no "will_link" result passed back. The user is responsible |
|
297 |
// for checking linkability when retrieving the associated field. |
|
298 |
ciInstanceKlass* ciBytecodeStream::get_declared_field_holder() { |
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VM_ENTRY_MARK; |
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constantPoolHandle cpool(_method->get_Method()->constants()); |
1 | 301 |
int holder_index = get_field_holder_index(); |
302 |
bool ignore; |
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return CURRENT_ENV->get_klass_by_index(cpool, holder_index, ignore, _holder) |
1 | 304 |
->as_instance_klass(); |
305 |
} |
|
306 |
||
307 |
// ------------------------------------------------------------------ |
|
308 |
// ciBytecodeStream::get_field_holder_index |
|
309 |
// |
|
310 |
// Get the constant pool index of the declared holder of the field |
|
311 |
// referenced by the current bytecode. Used for generating |
|
312 |
// deoptimization information. |
|
313 |
int ciBytecodeStream::get_field_holder_index() { |
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GUARDED_VM_ENTRY( |
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ConstantPool* cpool = _holder->get_instanceKlass()->constants(); |
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return cpool->klass_ref_index_at(get_field_index()); |
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) |
1 | 318 |
} |
319 |
||
320 |
// ------------------------------------------------------------------ |
|
321 |
// ciBytecodeStream::get_field_signature_index |
|
322 |
// |
|
323 |
// Get the constant pool index of the signature of the field |
|
324 |
// referenced by the current bytecode. Used for generating |
|
325 |
// deoptimization information. |
|
326 |
int ciBytecodeStream::get_field_signature_index() { |
|
327 |
VM_ENTRY_MARK; |
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328 |
ConstantPool* cpool = _holder->get_instanceKlass()->constants(); |
1 | 329 |
int nt_index = cpool->name_and_type_ref_index_at(get_field_index()); |
330 |
return cpool->signature_ref_index_at(nt_index); |
|
331 |
} |
|
332 |
||
333 |
// ------------------------------------------------------------------ |
|
334 |
// ciBytecodeStream::get_method_index |
|
335 |
// |
|
336 |
// If this is a method invocation bytecode, get the constant pool |
|
337 |
// index of the invoked method. |
|
338 |
int ciBytecodeStream::get_method_index() { |
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339 |
#ifdef ASSERT |
1 | 340 |
switch (cur_bc()) { |
341 |
case Bytecodes::_invokeinterface: |
|
342 |
case Bytecodes::_invokevirtual: |
|
343 |
case Bytecodes::_invokespecial: |
|
344 |
case Bytecodes::_invokestatic: |
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case Bytecodes::_invokedynamic: |
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346 |
break; |
1 | 347 |
default: |
348 |
ShouldNotReachHere(); |
|
349 |
} |
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350 |
#endif |
5688 | 351 |
if (has_index_u4()) |
352 |
return get_index_u4(); // invokedynamic |
|
353 |
return get_index_u2_cpcache(); |
|
1 | 354 |
} |
355 |
||
356 |
// ------------------------------------------------------------------ |
|
357 |
// ciBytecodeStream::get_method |
|
358 |
// |
|
359 |
// If this is a method invocation bytecode, get the invoked method. |
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// Additionally return the declared signature to get more concrete |
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// type information if required (Cf. invokedynamic and invokehandle). |
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ciMethod* ciBytecodeStream::get_method(bool& will_link, ciSignature* *declared_signature_result) { |
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VM_ENTRY_MARK; |
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ciEnv* env = CURRENT_ENV; |
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constantPoolHandle cpool(THREAD, _method->get_Method()->constants()); |
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ciMethod* m = env->get_method_by_index(cpool, get_method_index(), cur_bc(), _holder); |
1 | 367 |
will_link = m->is_loaded(); |
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368 |
|
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// Use the MethodType stored in the CP cache to create a signature |
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// with correct types (in respect to class loaders). |
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if (has_method_type()) { |
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ciSymbol* sig_sym = env->get_symbol(cpool->symbol_at(get_method_signature_index(cpool))); |
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ciKlass* pool_holder = env->get_klass(cpool->pool_holder()); |
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ciMethodType* method_type = get_method_type(); |
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ciSignature* declared_signature = new (env->arena()) ciSignature(pool_holder, sig_sym, method_type); |
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(*declared_signature_result) = declared_signature; |
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} else { |
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(*declared_signature_result) = m->signature(); |
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} |
1 | 380 |
return m; |
381 |
} |
|
382 |
||
383 |
// ------------------------------------------------------------------ |
|
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// ciBytecodeStream::has_appendix |
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// |
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// Returns true if there is an appendix argument stored in the |
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// constant pool cache at the current bci. |
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bool ciBytecodeStream::has_appendix() { |
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VM_ENTRY_MARK; |
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constantPoolHandle cpool(_method->get_Method()->constants()); |
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return ConstantPool::has_appendix_at_if_loaded(cpool, get_method_index()); |
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} |
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393 |
|
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// ------------------------------------------------------------------ |
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395 |
// ciBytecodeStream::get_appendix |
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// |
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// Return the appendix argument stored in the constant pool cache at |
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// the current bci. |
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399 |
ciObject* ciBytecodeStream::get_appendix() { |
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VM_ENTRY_MARK; |
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constantPoolHandle cpool(_method->get_Method()->constants()); |
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oop appendix_oop = ConstantPool::appendix_at_if_loaded(cpool, get_method_index()); |
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403 |
return CURRENT_ENV->get_object(appendix_oop); |
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} |
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405 |
|
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406 |
// ------------------------------------------------------------------ |
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// ciBytecodeStream::has_method_type |
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408 |
// |
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|
409 |
// Returns true if there is a MethodType argument stored in the |
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// constant pool cache at the current bci. |
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411 |
bool ciBytecodeStream::has_method_type() { |
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412 |
GUARDED_VM_ENTRY( |
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|
413 |
constantPoolHandle cpool(_method->get_Method()->constants()); |
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|
414 |
return ConstantPool::has_method_type_at_if_loaded(cpool, get_method_index()); |
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|
415 |
) |
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|
416 |
} |
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|
417 |
|
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|
418 |
// ------------------------------------------------------------------ |
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419 |
// ciBytecodeStream::get_method_type |
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420 |
// |
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|
421 |
// Return the MethodType stored in the constant pool cache at |
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|
422 |
// the current bci. |
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|
423 |
ciMethodType* ciBytecodeStream::get_method_type() { |
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424 |
GUARDED_VM_ENTRY( |
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|
425 |
constantPoolHandle cpool(_method->get_Method()->constants()); |
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|
426 |
oop method_type_oop = ConstantPool::method_type_at_if_loaded(cpool, get_method_index()); |
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|
427 |
return CURRENT_ENV->get_object(method_type_oop)->as_method_type(); |
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|
428 |
) |
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|
429 |
} |
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|
430 |
|
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|
431 |
// ------------------------------------------------------------------ |
1 | 432 |
// ciBytecodeStream::get_declared_method_holder |
433 |
// |
|
434 |
// Get the declared holder of the currently referenced method. |
|
435 |
// |
|
436 |
// Usage note: the holder() of a ciMethod class returns the canonical |
|
437 |
// holder of the method, rather than the holder declared in the |
|
438 |
// bytecodes. |
|
439 |
// |
|
440 |
// There is no "will_link" result passed back. The user is responsible |
|
441 |
// for checking linkability when retrieving the associated method. |
|
442 |
ciKlass* ciBytecodeStream::get_declared_method_holder() { |
|
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443 |
VM_ENTRY_MARK; |
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|
444 |
constantPoolHandle cpool(_method->get_Method()->constants()); |
1 | 445 |
bool ignore; |
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446 |
// report as MethodHandle for invokedynamic, which is syntactically classless |
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|
447 |
if (cur_bc() == Bytecodes::_invokedynamic) |
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|
448 |
return CURRENT_ENV->get_klass_by_name(_holder, ciSymbol::java_lang_invoke_MethodHandle(), false); |
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449 |
return CURRENT_ENV->get_klass_by_index(cpool, get_method_holder_index(), ignore, _holder); |
1 | 450 |
} |
451 |
||
452 |
// ------------------------------------------------------------------ |
|
453 |
// ciBytecodeStream::get_method_holder_index |
|
454 |
// |
|
455 |
// Get the constant pool index of the declared holder of the method |
|
456 |
// referenced by the current bytecode. Used for generating |
|
457 |
// deoptimization information. |
|
458 |
int ciBytecodeStream::get_method_holder_index() { |
|
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|
459 |
ConstantPool* cpool = _method->get_Method()->constants(); |
1 | 460 |
return cpool->klass_ref_index_at(get_method_index()); |
461 |
} |
|
462 |
||
463 |
// ------------------------------------------------------------------ |
|
464 |
// ciBytecodeStream::get_method_signature_index |
|
465 |
// |
|
466 |
// Get the constant pool index of the signature of the method |
|
467 |
// referenced by the current bytecode. Used for generating |
|
468 |
// deoptimization information. |
|
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469 |
int ciBytecodeStream::get_method_signature_index(const constantPoolHandle& cpool) { |
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|
470 |
GUARDED_VM_ENTRY( |
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|
471 |
const int method_index = get_method_index(); |
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|
472 |
const int name_and_type_index = cpool->name_and_type_ref_index_at(method_index); |
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|
473 |
return cpool->signature_ref_index_at(name_and_type_index); |
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|
474 |
) |
1 | 475 |
} |
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|
476 |
|
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477 |
// ------------------------------------------------------------------ |
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478 |
// ciBytecodeStream::get_resolved_references |
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479 |
ciObjArray* ciBytecodeStream::get_resolved_references() { |
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480 |
VM_ENTRY_MARK; |
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|
481 |
// Get the constant pool. |
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|
482 |
ConstantPool* cpool = _holder->get_instanceKlass()->constants(); |
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|
483 |
|
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484 |
// Create a resolved references array and return it. |
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|
485 |
return CURRENT_ENV->get_object(cpool->resolved_references())->as_obj_array(); |
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|
486 |
} |