Mercurial > hg > graal-compiler
view src/share/vm/ci/ciStreams.cpp @ 12258:69f26e8e09f9
8024760: add more types, fields and constants to VMStructs
Reviewed-by: kvn, coleenp
author | twisti |
---|---|
date | Fri, 13 Sep 2013 16:55:44 -0700 |
parents | f6b0eb4e44cf |
children |
line wrap: on
line source
/* * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "ci/ciCallSite.hpp" #include "ci/ciConstant.hpp" #include "ci/ciField.hpp" #include "ci/ciStreams.hpp" #include "ci/ciUtilities.hpp" // ciExceptionHandlerStream // // Walk over some selected set of a methods exception handlers. // ------------------------------------------------------------------ // ciExceptionHandlerStream::count // // How many exception handlers are there in this stream? // // Implementation note: Compiler2 needs this functionality, so I had int ciExceptionHandlerStream::count() { int save_pos = _pos; int save_end = _end; int count = 0; _pos = -1; _end = _method->_handler_count; next(); while (!is_done()) { count++; next(); } _pos = save_pos; _end = save_end; return count; } int ciExceptionHandlerStream::count_remaining() { int save_pos = _pos; int save_end = _end; int count = 0; while (!is_done()) { count++; next(); } _pos = save_pos; _end = save_end; return count; } // ciBytecodeStream // // The class is used to iterate over the bytecodes of a method. // It hides the details of constant pool structure/access by // providing accessors for constant pool items. // ------------------------------------------------------------------ // ciBytecodeStream::next_wide_or_table // // Special handling for switch ops Bytecodes::Code ciBytecodeStream::next_wide_or_table(Bytecodes::Code bc) { switch (bc) { // Check for special bytecode handling case Bytecodes::_wide: // Special handling for the wide bytcode // Get following bytecode; do not return wide assert(Bytecodes::Code(_pc[0]) == Bytecodes::_wide, ""); bc = Bytecodes::java_code(_raw_bc = (Bytecodes::Code)_pc[1]); assert(Bytecodes::wide_length_for(bc) > 2, "must make progress"); _pc += Bytecodes::wide_length_for(bc); _was_wide = _pc; // Flag last wide bytecode found assert(is_wide(), "accessor works right"); break; case Bytecodes::_lookupswitch: _pc++; // Skip wide bytecode _pc += (_start-_pc)&3; // Word align _table_base = (jint*)_pc; // Capture for later usage // table_base[0] is default far_dest // Table has 2 lead elements (default, length), then pairs of u4 values. // So load table length, and compute address at end of table _pc = (address)&_table_base[2+ 2*Bytes::get_Java_u4((address)&_table_base[1])]; break; case Bytecodes::_tableswitch: { _pc++; // Skip wide bytecode _pc += (_start-_pc)&3; // Word align _table_base = (jint*)_pc; // Capture for later usage // table_base[0] is default far_dest int lo = Bytes::get_Java_u4((address)&_table_base[1]);// Low bound int hi = Bytes::get_Java_u4((address)&_table_base[2]);// High bound int len = hi - lo + 1; // Dense table size _pc = (address)&_table_base[3+len]; // Skip past table break; } default: fatal("unhandled bytecode"); } return bc; } // ------------------------------------------------------------------ // ciBytecodeStream::reset_to_bci void ciBytecodeStream::reset_to_bci( int bci ) { _bc_start=_was_wide=0; _pc = _start+bci; } // ------------------------------------------------------------------ // ciBytecodeStream::force_bci void ciBytecodeStream::force_bci(int bci) { if (bci < 0) { reset_to_bci(0); _bc_start = _start + bci; _bc = EOBC(); } else { reset_to_bci(bci); next(); } } // ------------------------------------------------------------------ // Constant pool access // ------------------------------------------------------------------ // ------------------------------------------------------------------ // ciBytecodeStream::get_klass_index // // If this bytecodes references a klass, return the index of the // referenced klass. int ciBytecodeStream::get_klass_index() const { switch(cur_bc()) { case Bytecodes::_ldc: return get_index_u1(); case Bytecodes::_ldc_w: case Bytecodes::_ldc2_w: case Bytecodes::_checkcast: case Bytecodes::_instanceof: case Bytecodes::_anewarray: case Bytecodes::_multianewarray: case Bytecodes::_new: case Bytecodes::_newarray: return get_index_u2(); default: ShouldNotReachHere(); return 0; } } // ------------------------------------------------------------------ // ciBytecodeStream::get_klass // // If this bytecode is a new, newarray, multianewarray, instanceof, // or checkcast, get the referenced klass. ciKlass* ciBytecodeStream::get_klass(bool& will_link) { VM_ENTRY_MARK; constantPoolHandle cpool(_method->get_Method()->constants()); return CURRENT_ENV->get_klass_by_index(cpool, get_klass_index(), will_link, _holder); } // ------------------------------------------------------------------ // ciBytecodeStream::get_constant_raw_index // // If this bytecode is one of the ldc variants, get the index of the // referenced constant. int ciBytecodeStream::get_constant_raw_index() const { // work-alike for Bytecode_loadconstant::raw_index() switch (cur_bc()) { case Bytecodes::_ldc: return get_index_u1(); case Bytecodes::_ldc_w: case Bytecodes::_ldc2_w: return get_index_u2(); default: ShouldNotReachHere(); return 0; } } // ------------------------------------------------------------------ // ciBytecodeStream::get_constant_pool_index // Decode any reference index into a regular pool index. int ciBytecodeStream::get_constant_pool_index() const { // work-alike for Bytecode_loadconstant::pool_index() int index = get_constant_raw_index(); if (has_cache_index()) { VM_ENTRY_MARK; constantPoolHandle cpool(_method->get_Method()->constants()); return cpool->object_to_cp_index(index); } return index; } // ------------------------------------------------------------------ // ciBytecodeStream::get_constant_cache_index // Return the CP cache index, or -1 if there isn't any. int ciBytecodeStream::get_constant_cache_index() const { // work-alike for Bytecode_loadconstant::cache_index() return has_cache_index() ? get_constant_raw_index() : -1; } // ------------------------------------------------------------------ // ciBytecodeStream::get_constant // // If this bytecode is one of the ldc variants, get the referenced // constant. ciConstant ciBytecodeStream::get_constant() { int pool_index = get_constant_raw_index(); int cache_index = -1; if (has_cache_index()) { cache_index = pool_index; pool_index = -1; } VM_ENTRY_MARK; constantPoolHandle cpool(_method->get_Method()->constants()); return CURRENT_ENV->get_constant_by_index(cpool, pool_index, cache_index, _holder); } // ------------------------------------------------------------------ // ciBytecodeStream::get_constant_pool_tag // // If this bytecode is one of the ldc variants, get the referenced // constant. constantTag ciBytecodeStream::get_constant_pool_tag(int index) const { VM_ENTRY_MARK; return _method->get_Method()->constants()->tag_at(index); } // ------------------------------------------------------------------ // ciBytecodeStream::get_field_index // // If this is a field access bytecode, get the constant pool // index of the referenced field. int ciBytecodeStream::get_field_index() { assert(cur_bc() == Bytecodes::_getfield || cur_bc() == Bytecodes::_putfield || cur_bc() == Bytecodes::_getstatic || cur_bc() == Bytecodes::_putstatic, "wrong bc"); return get_index_u2_cpcache(); } // ------------------------------------------------------------------ // ciBytecodeStream::get_field // // If this bytecode is one of get_field, get_static, put_field, // or put_static, get the referenced field. ciField* ciBytecodeStream::get_field(bool& will_link) { ciField* f = CURRENT_ENV->get_field_by_index(_holder, get_field_index()); will_link = f->will_link(_holder, _bc); return f; } // ------------------------------------------------------------------ // ciBytecodeStream::get_declared_field_holder // // Get the declared holder of the currently referenced field. // // Usage note: the holder() of a ciField class returns the canonical // holder of the field, rather than the holder declared in the // bytecodes. // // There is no "will_link" result passed back. The user is responsible // for checking linkability when retrieving the associated field. ciInstanceKlass* ciBytecodeStream::get_declared_field_holder() { VM_ENTRY_MARK; constantPoolHandle cpool(_method->get_Method()->constants()); int holder_index = get_field_holder_index(); bool ignore; return CURRENT_ENV->get_klass_by_index(cpool, holder_index, ignore, _holder) ->as_instance_klass(); } // ------------------------------------------------------------------ // ciBytecodeStream::get_field_holder_index // // Get the constant pool index of the declared holder of the field // referenced by the current bytecode. Used for generating // deoptimization information. int ciBytecodeStream::get_field_holder_index() { GUARDED_VM_ENTRY( ConstantPool* cpool = _holder->get_instanceKlass()->constants(); return cpool->klass_ref_index_at(get_field_index()); ) } // ------------------------------------------------------------------ // ciBytecodeStream::get_field_signature_index // // Get the constant pool index of the signature of the field // referenced by the current bytecode. Used for generating // deoptimization information. int ciBytecodeStream::get_field_signature_index() { VM_ENTRY_MARK; ConstantPool* cpool = _holder->get_instanceKlass()->constants(); int nt_index = cpool->name_and_type_ref_index_at(get_field_index()); return cpool->signature_ref_index_at(nt_index); } // ------------------------------------------------------------------ // ciBytecodeStream::get_method_index // // If this is a method invocation bytecode, get the constant pool // index of the invoked method. int ciBytecodeStream::get_method_index() { #ifdef ASSERT switch (cur_bc()) { case Bytecodes::_invokeinterface: case Bytecodes::_invokevirtual: case Bytecodes::_invokespecial: case Bytecodes::_invokestatic: case Bytecodes::_invokedynamic: break; default: ShouldNotReachHere(); } #endif if (has_index_u4()) return get_index_u4(); // invokedynamic return get_index_u2_cpcache(); } // ------------------------------------------------------------------ // ciBytecodeStream::get_method // // If this is a method invocation bytecode, get the invoked method. // Additionally return the declared signature to get more concrete // type information if required (Cf. invokedynamic and invokehandle). ciMethod* ciBytecodeStream::get_method(bool& will_link, ciSignature* *declared_signature_result) { VM_ENTRY_MARK; ciEnv* env = CURRENT_ENV; constantPoolHandle cpool(_method->get_Method()->constants()); ciMethod* m = env->get_method_by_index(cpool, get_method_index(), cur_bc(), _holder); will_link = m->is_loaded(); // Use the MethodType stored in the CP cache to create a signature // with correct types (in respect to class loaders). if (has_method_type()) { ciSymbol* sig_sym = env->get_symbol(cpool->symbol_at(get_method_signature_index())); ciKlass* pool_holder = env->get_klass(cpool->pool_holder()); ciMethodType* method_type = get_method_type(); ciSignature* declared_signature = new (env->arena()) ciSignature(pool_holder, sig_sym, method_type); (*declared_signature_result) = declared_signature; } else { (*declared_signature_result) = m->signature(); } return m; } // ------------------------------------------------------------------ // ciBytecodeStream::has_appendix // // Returns true if there is an appendix argument stored in the // constant pool cache at the current bci. bool ciBytecodeStream::has_appendix() { VM_ENTRY_MARK; constantPoolHandle cpool(_method->get_Method()->constants()); return ConstantPool::has_appendix_at_if_loaded(cpool, get_method_index()); } // ------------------------------------------------------------------ // ciBytecodeStream::get_appendix // // Return the appendix argument stored in the constant pool cache at // the current bci. ciObject* ciBytecodeStream::get_appendix() { VM_ENTRY_MARK; constantPoolHandle cpool(_method->get_Method()->constants()); oop appendix_oop = ConstantPool::appendix_at_if_loaded(cpool, get_method_index()); return CURRENT_ENV->get_object(appendix_oop); } // ------------------------------------------------------------------ // ciBytecodeStream::has_method_type // // Returns true if there is a MethodType argument stored in the // constant pool cache at the current bci. bool ciBytecodeStream::has_method_type() { GUARDED_VM_ENTRY( constantPoolHandle cpool(_method->get_Method()->constants()); return ConstantPool::has_method_type_at_if_loaded(cpool, get_method_index()); ) } // ------------------------------------------------------------------ // ciBytecodeStream::get_method_type // // Return the MethodType stored in the constant pool cache at // the current bci. ciMethodType* ciBytecodeStream::get_method_type() { GUARDED_VM_ENTRY( constantPoolHandle cpool(_method->get_Method()->constants()); oop method_type_oop = ConstantPool::method_type_at_if_loaded(cpool, get_method_index()); return CURRENT_ENV->get_object(method_type_oop)->as_method_type(); ) } // ------------------------------------------------------------------ // ciBytecodeStream::get_declared_method_holder // // Get the declared holder of the currently referenced method. // // Usage note: the holder() of a ciMethod class returns the canonical // holder of the method, rather than the holder declared in the // bytecodes. // // There is no "will_link" result passed back. The user is responsible // for checking linkability when retrieving the associated method. ciKlass* ciBytecodeStream::get_declared_method_holder() { VM_ENTRY_MARK; constantPoolHandle cpool(_method->get_Method()->constants()); bool ignore; // report as MethodHandle for invokedynamic, which is syntactically classless if (cur_bc() == Bytecodes::_invokedynamic) return CURRENT_ENV->get_klass_by_name(_holder, ciSymbol::java_lang_invoke_MethodHandle(), false); return CURRENT_ENV->get_klass_by_index(cpool, get_method_holder_index(), ignore, _holder); } // ------------------------------------------------------------------ // ciBytecodeStream::get_method_holder_index // // Get the constant pool index of the declared holder of the method // referenced by the current bytecode. Used for generating // deoptimization information. int ciBytecodeStream::get_method_holder_index() { ConstantPool* cpool = _method->get_Method()->constants(); return cpool->klass_ref_index_at(get_method_index()); } // ------------------------------------------------------------------ // ciBytecodeStream::get_method_signature_index // // Get the constant pool index of the signature of the method // referenced by the current bytecode. Used for generating // deoptimization information. int ciBytecodeStream::get_method_signature_index() { GUARDED_VM_ENTRY( ConstantPool* cpool = _holder->get_instanceKlass()->constants(); const int method_index = get_method_index(); const int name_and_type_index = cpool->name_and_type_ref_index_at(method_index); return cpool->signature_ref_index_at(name_and_type_index); ) } // ------------------------------------------------------------------ // ciBytecodeStream::get_resolved_references ciObjArray* ciBytecodeStream::get_resolved_references() { VM_ENTRY_MARK; // Get the constant pool. ConstantPool* cpool = _holder->get_instanceKlass()->constants(); // Create a resolved references array and return it. return CURRENT_ENV->get_object(cpool->resolved_references())->as_obj_array(); }