--- old/hotspot/src/share/vm/code/codeCacheExtensions_ext.hpp 2016-12-02 11:26:42.906154714 -0500 +++ /dev/null 2016-08-24 15:41:39.598575000 -0400 @@ -1,130 +0,0 @@ -/* - * Copyright (c) 2012, 2015, 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. - * - */ - -#ifndef SHARE_VM_CODE_CODE_CACHE_EXTENSIONS_EXT_HPP -#define SHARE_VM_CODE_CODE_CACHE_EXTENSIONS_EXT_HPP - -#include "utilities/macros.hpp" -#include "memory/allocation.hpp" -#include "utilities/globalDefinitions.hpp" -#include "interpreter/bytecodes.hpp" - -class AdapterHandlerEntry; -class CodeBlob; -class CodeBuffer; -class InterpreterMacroAssembler; -class Template; - -// All the methods defined here are placeholders for possible extensions. - -class CodeCacheExtensions: AllStatic { - friend class CodeCacheDumper; - -public: - // init both code saving and loading - // Must be called very early, before any code is generated. - static void initialize() {} - - // Check whether the generated interpreter will be saved. - static bool saving_generated_interpreter() { return false; } - - // Check whether a pregenerated interpreter is used. - static bool use_pregenerated_interpreter() { return false; } - - // Placeholder for additional VM initialization code - static void complete_step(CodeCacheExtensionsSteps::Step phase) {} - - // Return false for newly generated code, on systems where it is not - // executable. - static bool is_executable(void *pc) { return true; } - - // Return whether dynamically generated code can be executable - static bool support_dynamic_code() { return true; } - - // Skip new code generation when known to be useless. - static bool skip_code_generation() { return false; } - - // Skip stubs used only for compiled code support. - static bool skip_compiler_support() { return false; } - - // Ignore UseFastSignatureHandlers when returning false - static bool support_fast_signature_handlers() { return true; } - - ///////////////////////// - // Handle generated code: - // - allow newly generated code to be shared - // - allow pregenerated code to be used in place of the newly generated one - // (modifying pc). - // - support remapping when doing both save and load - // 'remap' can be set to false if the addresses handled are not referenced - // from code generated later. - - // Associate a name to a generated codelet and possibly modify the pc - // Note: use instead the specialized versions when they exist: - // - handle_generated_blob for CodeBlob - // - handle_generated_handler for SignatureHandlers - // See also the optimized calls below that handle several PCs at once. - static void handle_generated_pc(address &pc, const char *name) {} - - // Adds a safe definition of the codelet, for codelets used right after - // generation (else we would need to immediately stop the JVM and convert - // the generated code to executable format before being able to go further). - static void handle_generated_pc(address &pc, const char *name, address default_entry) {} - - // Special cases - - // Special case for CodeBlobs, which may require blob specific actions. - static CodeBlob* handle_generated_blob(CodeBlob* blob, const char *name = NULL) { return blob; } - - // Special case for Signature Handlers. - static void handle_generated_handler(address &handler_start, const char *name, address handler_end) {} - - // Support for generating different variants of the interpreter - // that can be dynamically selected after reload. - // - // - init_interpreter_assembler allows to configure the assembler for - // the current variant - // - // - needs_other_interpreter_variant returns true as long as other - // variants are needed. - // - // - skip_template_interpreter_entries returns true if new entries - // need not be generated for this masm setup and this bytecode - // - // - completed_template_interpreter_entries is called after new - // entries have been generated and installed, for any non skipped - // bytecode. - static void init_interpreter_assembler(InterpreterMacroAssembler* masm, CodeBuffer* code) {} - static bool needs_other_interpreter_variant() { return false; } - static bool skip_template_interpreter_entries(Bytecodes::Code code) { return false; } - static void completed_template_interpreter_entries(InterpreterMacroAssembler* masm, Bytecodes::Code code) {} - - // Code size optimization. May optimize the requested size. - static void size_blob(const char* name, int *updatable_size) {} - - // ergonomics - static void set_ergonomics_flags() {} -}; - -#endif // SHARE_VM_CODE_CODE_CACHE_EXTENSIONS_EXT_HPP