Mercurial > hg > truffle
view src/share/vm/oops/constMethod.cpp @ 7566:dea5423a9479
Exclude FastMath::slowLog for now
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Wed, 30 Jan 2013 16:46:15 +0100 |
parents | ade95d680b42 |
children | 16fb9f942703 |
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/* * Copyright (c) 2003, 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 "interpreter/interpreter.hpp" #include "memory/gcLocker.hpp" #include "memory/metadataFactory.hpp" #include "oops/constMethod.hpp" #include "oops/method.hpp" // Static initialization const u2 ConstMethod::MAX_IDNUM = 0xFFFE; const u2 ConstMethod::UNSET_IDNUM = 0xFFFF; ConstMethod* ConstMethod::allocate(ClassLoaderData* loader_data, int byte_code_size, int compressed_line_number_size, int localvariable_table_length, int exception_table_length, int checked_exceptions_length, int method_parameters_length, u2 generic_signature_index, MethodType method_type, TRAPS) { int size = ConstMethod::size(byte_code_size, compressed_line_number_size, localvariable_table_length, exception_table_length, checked_exceptions_length, method_parameters_length, generic_signature_index); return new (loader_data, size, true, THREAD) ConstMethod( byte_code_size, compressed_line_number_size, localvariable_table_length, exception_table_length, checked_exceptions_length, method_parameters_length, generic_signature_index, method_type, size); } ConstMethod::ConstMethod(int byte_code_size, int compressed_line_number_size, int localvariable_table_length, int exception_table_length, int checked_exceptions_length, int method_parameters_length, u2 generic_signature_index, MethodType method_type, int size) { No_Safepoint_Verifier no_safepoint; set_interpreter_kind(Interpreter::invalid); init_fingerprint(); set_constants(NULL); set_stackmap_data(NULL); set_code_size(byte_code_size); set_constMethod_size(size); set_inlined_tables_length(generic_signature_index, checked_exceptions_length, compressed_line_number_size, localvariable_table_length, exception_table_length, method_parameters_length); set_method_type(method_type); assert(this->size() == size, "wrong size for object"); } // Deallocate metadata fields associated with ConstMethod* void ConstMethod::deallocate_contents(ClassLoaderData* loader_data) { set_interpreter_kind(Interpreter::invalid); if (stackmap_data() != NULL) { MetadataFactory::free_array<u1>(loader_data, stackmap_data()); } set_stackmap_data(NULL); } // How big must this constMethodObject be? int ConstMethod::size(int code_size, int compressed_line_number_size, int local_variable_table_length, int exception_table_length, int checked_exceptions_length, int method_parameters_length, u2 generic_signature_index) { int extra_bytes = code_size; if (compressed_line_number_size > 0) { extra_bytes += compressed_line_number_size; } if (checked_exceptions_length > 0) { extra_bytes += sizeof(u2); extra_bytes += checked_exceptions_length * sizeof(CheckedExceptionElement); } if (local_variable_table_length > 0) { extra_bytes += sizeof(u2); extra_bytes += local_variable_table_length * sizeof(LocalVariableTableElement); } if (exception_table_length > 0) { extra_bytes += sizeof(u2); extra_bytes += exception_table_length * sizeof(ExceptionTableElement); } if (generic_signature_index != 0) { extra_bytes += sizeof(u2); } if (method_parameters_length > 0) { extra_bytes += sizeof(u2); extra_bytes += method_parameters_length * sizeof(MethodParametersElement); } int extra_words = align_size_up(extra_bytes, BytesPerWord) / BytesPerWord; return align_object_size(header_size() + extra_words); } Method* ConstMethod::method() const { return _constants->pool_holder()->method_with_idnum(_method_idnum); } // linenumber table - note that length is unknown until decompression, // see class CompressedLineNumberReadStream. u_char* ConstMethod::compressed_linenumber_table() const { // Located immediately following the bytecodes. assert(has_linenumber_table(), "called only if table is present"); return code_end(); } u2* ConstMethod::generic_signature_index_addr() const { // Located at the end of the constMethod. assert(has_generic_signature(), "called only if generic signature exists"); return last_u2_element(); } u2* ConstMethod::checked_exceptions_length_addr() const { // Located immediately before the generic signature index. assert(has_checked_exceptions(), "called only if table is present"); if(has_method_parameters()) { // If method parameters present, locate immediately before them. return (u2*)method_parameters_start() - 1; } else { // Else, the exception table is at the end of the constMethod. return has_generic_signature() ? (last_u2_element() - 1) : last_u2_element(); } } u2* ConstMethod::method_parameters_length_addr() const { assert(has_method_parameters(), "called only if table is present"); return has_generic_signature() ? (last_u2_element() - 1) : last_u2_element(); } u2* ConstMethod::exception_table_length_addr() const { assert(has_exception_handler(), "called only if table is present"); if (has_checked_exceptions()) { // If checked_exception present, locate immediately before them. return (u2*) checked_exceptions_start() - 1; } else { if(has_method_parameters()) { // If method parameters present, locate immediately before them. return (u2*)method_parameters_start() - 1; } else { // Else, the exception table is at the end of the constMethod. return has_generic_signature() ? (last_u2_element() - 1) : last_u2_element(); } } } u2* ConstMethod::localvariable_table_length_addr() const { assert(has_localvariable_table(), "called only if table is present"); if (has_exception_handler()) { // If exception_table present, locate immediately before them. return (u2*) exception_table_start() - 1; } else { if (has_checked_exceptions()) { // If checked_exception present, locate immediately before them. return (u2*) checked_exceptions_start() - 1; } else { if(has_method_parameters()) { // If method parameters present, locate immediately before them. return (u2*)method_parameters_start() - 1; } else { // Else, the exception table is at the end of the constMethod. return has_generic_signature() ? (last_u2_element() - 1) : last_u2_element(); } } } } // Update the flags to indicate the presence of these optional fields. void ConstMethod::set_inlined_tables_length(u2 generic_signature_index, int checked_exceptions_len, int compressed_line_number_size, int localvariable_table_len, int exception_table_len, int method_parameters_len) { assert(_flags == 0, "Error"); if (compressed_line_number_size > 0) _flags |= _has_linenumber_table; if (generic_signature_index != 0) _flags |= _has_generic_signature; if (method_parameters_len > 0) _flags |= _has_method_parameters; if (checked_exceptions_len > 0) _flags |= _has_checked_exceptions; if (exception_table_len > 0) _flags |= _has_exception_table; if (localvariable_table_len > 0) _flags |= _has_localvariable_table; // This code is extremely brittle and should possibly be revised. // The *_length_addr functions walk backwards through the // constMethod data, using each of the length indexes ahead of them, // as well as the flags variable. Therefore, the indexes must be // initialized in reverse order, or else they will compute the wrong // offsets. Moving the initialization of _flags into a separate // block solves *half* of the problem, but the following part will // still break if the order is not exactly right. // // Also, the servicability agent needs to be informed anytime // anything is added here. It might be advisable to have some sort // of indication of this inline. if (generic_signature_index != 0) *(generic_signature_index_addr()) = generic_signature_index; // New data should probably go here. if (method_parameters_len > 0) *(method_parameters_length_addr()) = method_parameters_len; if (checked_exceptions_len > 0) *(checked_exceptions_length_addr()) = checked_exceptions_len; if (exception_table_len > 0) *(exception_table_length_addr()) = exception_table_len; if (localvariable_table_len > 0) *(localvariable_table_length_addr()) = localvariable_table_len; } int ConstMethod::method_parameters_length() const { return has_method_parameters() ? *(method_parameters_length_addr()) : 0; } MethodParametersElement* ConstMethod::method_parameters_start() const { u2* addr = method_parameters_length_addr(); u2 length = *addr; assert(length > 0, "should only be called if table is present"); addr -= length * sizeof(MethodParametersElement) / sizeof(u2); return (MethodParametersElement*) addr; } int ConstMethod::checked_exceptions_length() const { return has_checked_exceptions() ? *(checked_exceptions_length_addr()) : 0; } CheckedExceptionElement* ConstMethod::checked_exceptions_start() const { u2* addr = checked_exceptions_length_addr(); u2 length = *addr; assert(length > 0, "should only be called if table is present"); addr -= length * sizeof(CheckedExceptionElement) / sizeof(u2); return (CheckedExceptionElement*) addr; } int ConstMethod::localvariable_table_length() const { return has_localvariable_table() ? *(localvariable_table_length_addr()) : 0; } LocalVariableTableElement* ConstMethod::localvariable_table_start() const { u2* addr = localvariable_table_length_addr(); u2 length = *addr; assert(length > 0, "should only be called if table is present"); addr -= length * sizeof(LocalVariableTableElement) / sizeof(u2); return (LocalVariableTableElement*) addr; } int ConstMethod::exception_table_length() const { return has_exception_handler() ? *(exception_table_length_addr()) : 0; } ExceptionTableElement* ConstMethod::exception_table_start() const { u2* addr = exception_table_length_addr(); u2 length = *addr; assert(length > 0, "should only be called if table is present"); addr -= length * sizeof(ExceptionTableElement) / sizeof(u2); return (ExceptionTableElement*)addr; } // Printing void ConstMethod::print_on(outputStream* st) const { ResourceMark rm; assert(is_constMethod(), "must be constMethod"); st->print_cr(internal_name()); st->print(" - method: " INTPTR_FORMAT " ", (address)method()); method()->print_value_on(st); st->cr(); if (has_stackmap_table()) { st->print(" - stackmap data: "); stackmap_data()->print_value_on(st); st->cr(); } } // Short version of printing ConstMethod* - just print the name of the // method it belongs to. void ConstMethod::print_value_on(outputStream* st) const { assert(is_constMethod(), "must be constMethod"); st->print(" const part of method " ); method()->print_value_on(st); } // Verification void ConstMethod::verify_on(outputStream* st) { guarantee(is_constMethod(), "object must be constMethod"); guarantee(is_metadata(), err_msg("Should be metadata " PTR_FORMAT, this)); // Verification can occur during oop construction before the method or // other fields have been initialized. guarantee(is_metadata(), err_msg("Should be metadata " PTR_FORMAT, this)); guarantee(method()->is_method(), "should be method"); address m_end = (address)((oop*) this + size()); address compressed_table_start = code_end(); guarantee(compressed_table_start <= m_end, "invalid method layout"); address compressed_table_end = compressed_table_start; // Verify line number table if (has_linenumber_table()) { CompressedLineNumberReadStream stream(compressed_linenumber_table()); while (stream.read_pair()) { guarantee(stream.bci() >= 0 && stream.bci() <= code_size(), "invalid bci in line number table"); } compressed_table_end += stream.position(); } guarantee(compressed_table_end <= m_end, "invalid method layout"); // Verify checked exceptions, exception table and local variable tables if (has_method_parameters()) { u2* addr = method_parameters_length_addr(); guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout"); } if (has_checked_exceptions()) { u2* addr = checked_exceptions_length_addr(); guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout"); } if (has_exception_handler()) { u2* addr = exception_table_length_addr(); guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout"); } if (has_localvariable_table()) { u2* addr = localvariable_table_length_addr(); guarantee(*addr > 0 && (address) addr >= compressed_table_end && (address) addr < m_end, "invalid method layout"); } // Check compressed_table_end relative to uncompressed_table_start u2* uncompressed_table_start; if (has_localvariable_table()) { uncompressed_table_start = (u2*) localvariable_table_start(); } else if (has_exception_handler()) { uncompressed_table_start = (u2*) exception_table_start(); } else if (has_checked_exceptions()) { uncompressed_table_start = (u2*) checked_exceptions_start(); } else if (has_method_parameters()) { uncompressed_table_start = (u2*) method_parameters_start(); } else { uncompressed_table_start = (u2*) m_end; } int gap = (intptr_t) uncompressed_table_start - (intptr_t) compressed_table_end; int max_gap = align_object_size(1)*BytesPerWord; guarantee(gap >= 0 && gap < max_gap, "invalid method layout"); }