1 /* 2 * Copyright (c) 2023, 2025, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_CDS_CDSCONFIG_HPP 26 #define SHARE_CDS_CDSCONFIG_HPP 27 28 #include "memory/allStatic.hpp" 29 #include "utilities/globalDefinitions.hpp" 30 #include "utilities/macros.hpp" 31 32 class InstanceKlass; 33 class JavaThread; 34 35 class CDSConfig : public AllStatic { 36 #if INCLUDE_CDS 37 static bool _is_dumping_static_archive; 38 static bool _is_dumping_preimage_static_archive; 39 static bool _is_dumping_final_static_archive; 40 static bool _is_dumping_dynamic_archive; 41 static bool _is_using_optimized_module_handling; 42 static bool _is_dumping_full_module_graph; 43 static bool _is_using_full_module_graph; 44 static bool _has_aot_linked_classes; 45 static bool _is_loading_packages; 46 static bool _is_loading_protection_domains; 47 static bool _is_security_manager_allowed; 48 49 static char* _default_archive_path; 50 static char* _static_archive_path; 51 static char* _dynamic_archive_path; 52 53 static bool _old_cds_flags_used; 54 static bool _new_aot_flags_used; 55 static bool _disable_heap_dumping; 56 57 static JavaThread* _dumper_thread; 58 #endif 59 60 static void extract_shared_archive_paths(const char* archive_path, 61 char** base_archive_path, 62 char** top_archive_path); 63 static void init_shared_archive_paths(); 64 65 static void check_flag_alias(bool alias_is_default, const char* alias_name); 66 static void check_aot_flags(); 67 static void check_aotmode_off(); 68 static void check_aotmode_auto_or_on(); 69 static void check_aotmode_record(); 70 static void check_aotmode_create(); 71 static void setup_compiler_args(); 72 static bool setup_experimental_leyden_workflow(bool xshare_auto_cmd_line); // Deprecated -- to be removed 73 74 public: 75 // Used by jdk.internal.misc.CDS.getCDSConfigStatus(); 76 static const int IS_DUMPING_ARCHIVE = 1 << 0; 77 static const int IS_DUMPING_STATIC_ARCHIVE = 1 << 1; 78 static const int IS_LOGGING_LAMBDA_FORM_INVOKERS = 1 << 2; 79 static const int IS_USING_ARCHIVE = 1 << 3; 80 static const int IS_DUMPING_HEAP = 1 << 4; 81 static const int IS_LOGGING_DYNAMIC_PROXIES = 1 << 5; 82 static const int IS_DUMPING_PACKAGES = 1 << 6; 83 static const int IS_DUMPING_PROTECTION_DOMAINS = 1 << 7; 84 static int get_status() NOT_CDS_RETURN_(0); 85 86 // Initialization and command-line checking 87 static void initialize() NOT_CDS_RETURN; 88 static void set_old_cds_flags_used() { CDS_ONLY(_old_cds_flags_used = true); } 89 static bool old_cds_flags_used() { return CDS_ONLY(_old_cds_flags_used) NOT_CDS(false); } 90 static bool new_aot_flags_used() { return CDS_ONLY(_new_aot_flags_used) NOT_CDS(false); } 91 static void check_internal_module_property(const char* key, const char* value) NOT_CDS_RETURN; 92 static void check_incompatible_property(const char* key, const char* value) NOT_CDS_RETURN; 93 static void check_unsupported_dumping_module_options() NOT_CDS_RETURN; 94 static bool has_unsupported_runtime_module_options() NOT_CDS_RETURN_(false); 95 static bool check_vm_args_consistency(bool patch_mod_javabase, bool mode_flag_cmd_line, bool xshare_auto_cmd_line) NOT_CDS_RETURN_(true); 96 static const char* type_of_archive_being_loaded(); 97 static const char* type_of_archive_being_written(); 98 99 // --- Basic CDS features 100 101 // archive(s) in general 102 static bool is_dumping_archive() { return is_dumping_static_archive() || is_dumping_dynamic_archive(); } 103 static bool is_using_archive() NOT_CDS_RETURN_(false); 104 static int num_archives(const char* archive_path) NOT_CDS_RETURN_(0); 105 106 // static_archive 107 static bool is_dumping_static_archive() { return (CDS_ONLY(_is_dumping_static_archive) NOT_CDS(false)) 108 || is_dumping_final_static_archive(); } 109 static void enable_dumping_static_archive() { CDS_ONLY(_is_dumping_static_archive = true); } 110 111 112 // A static CDS archive can be dumped in three modes: 113 // 114 // "classic" - This is the traditional CDS workflow of 115 // "java -Xshare:dump -XX:SharedClassListFile=file.txt". 116 // 117 // "preimage" - This happens when we execute the JEP 483 training run, e.g: 118 // "java -XX:AOTMode=record -XX:AOTConfiguration=app.aotconfig -cp app.jar App" 119 // The above command writes app.aotconfig as a "CDS preimage". This 120 // is a binary file that contains all the classes loaded during the 121 // training run, plus profiling data (e.g., the resolved constant pool entries). 122 // 123 // "final" - This happens when we execute the JEP 483 assembly phase, e.g: 124 // "java -XX:AOTMode=create -XX:AOTConfiguration=app.aotconfig -XX:AOTCache=app.aot -cp app.jar" 125 // The above command loads all classes from app.aotconfig, perform additional linking, 126 // and writes app.aot as a "CDS final image" file. 127 // 128 // The main structural difference between "preimage" and "final" is that the preimage 129 // - has a different magic number (0xcafea07c) 130 // - does not have any archived Java heap objects 131 // - does not have aot-linked classes 132 static bool is_dumping_classic_static_archive() NOT_CDS_RETURN_(false); 133 static bool is_dumping_preimage_static_archive() NOT_CDS_RETURN_(false); 134 static bool is_dumping_preimage_static_archive_with_triggers() NOT_CDS_RETURN_(false); 135 static bool is_dumping_final_static_archive() NOT_CDS_RETURN_(false); 136 137 // dynamic_archive 138 static bool is_dumping_dynamic_archive() { return CDS_ONLY(_is_dumping_dynamic_archive) NOT_CDS(false); } 139 static void enable_dumping_dynamic_archive() { CDS_ONLY(_is_dumping_dynamic_archive = true); } 140 static void disable_dumping_dynamic_archive() { CDS_ONLY(_is_dumping_dynamic_archive = false); } 141 142 // Misc CDS features 143 static bool preserve_all_dumptime_verification_states(const InstanceKlass* ik); 144 static bool allow_only_single_java_thread() NOT_CDS_RETURN_(false); 145 146 // optimized_module_handling -- can we skip some expensive operations related to modules? 147 static bool is_using_optimized_module_handling() { return CDS_ONLY(_is_using_optimized_module_handling) NOT_CDS(false); } 148 static void stop_using_optimized_module_handling() NOT_CDS_RETURN; 149 150 static bool is_logging_lambda_form_invokers() NOT_CDS_RETURN_(false); 151 static bool is_dumping_regenerated_lambdaform_invokers() NOT_CDS_RETURN_(false); 152 153 static bool is_dumping_aot_linked_classes() NOT_CDS_JAVA_HEAP_RETURN_(false); 154 static bool is_using_aot_linked_classes() NOT_CDS_JAVA_HEAP_RETURN_(false); 155 static void set_has_aot_linked_classes(bool has_aot_linked_classes) NOT_CDS_JAVA_HEAP_RETURN; 156 157 // archive_path 158 159 // Points to the classes.jsa in $JAVA_HOME 160 static char* default_archive_path() NOT_CDS_RETURN_(nullptr); 161 // The actual static archive (if any) selected at runtime 162 static const char* static_archive_path() { return CDS_ONLY(_static_archive_path) NOT_CDS(nullptr); } 163 // The actual dynamic archive (if any) selected at runtime 164 static const char* dynamic_archive_path() { return CDS_ONLY(_dynamic_archive_path) NOT_CDS(nullptr); } 165 166 // --- Archived java objects 167 168 static bool are_vm_options_incompatible_with_dumping_heap() NOT_CDS_JAVA_HEAP_RETURN_(true); 169 static void log_reasons_for_not_dumping_heap(); 170 171 static void disable_heap_dumping() { CDS_ONLY(_disable_heap_dumping = true); } 172 static bool is_dumping_heap() NOT_CDS_JAVA_HEAP_RETURN_(false); 173 static bool is_loading_heap() NOT_CDS_JAVA_HEAP_RETURN_(false); 174 static bool is_initing_classes_at_dump_time() NOT_CDS_JAVA_HEAP_RETURN_(false); 175 176 static bool is_dumping_invokedynamic() NOT_CDS_JAVA_HEAP_RETURN_(false); 177 static bool is_dumping_method_handles() NOT_CDS_JAVA_HEAP_RETURN_(false); 178 179 static bool is_dumping_packages() NOT_CDS_JAVA_HEAP_RETURN_(false); 180 static bool is_loading_packages() NOT_CDS_JAVA_HEAP_RETURN_(false); 181 static void set_is_loading_packages() { CDS_JAVA_HEAP_ONLY(_is_loading_packages = true); } 182 183 static bool is_dumping_protection_domains() NOT_CDS_JAVA_HEAP_RETURN_(false); 184 static bool is_loading_protection_domains() NOT_CDS_JAVA_HEAP_RETURN_(false); 185 static void set_is_loading_protection_domains() { CDS_JAVA_HEAP_ONLY(_is_loading_protection_domains = true); } 186 187 static bool is_dumping_reflection_data() NOT_CDS_JAVA_HEAP_RETURN_(false); 188 189 static bool is_dumping_dynamic_proxies() NOT_CDS_JAVA_HEAP_RETURN_(false); 190 static bool is_logging_dynamic_proxies() NOT_CDS_RETURN_(false); 191 192 // full_module_graph (requires optimized_module_handling) 193 static bool is_dumping_full_module_graph() { return CDS_ONLY(_is_dumping_full_module_graph) NOT_CDS(false); } 194 static bool is_using_full_module_graph() NOT_CDS_JAVA_HEAP_RETURN_(false); 195 static void stop_dumping_full_module_graph(const char* reason = nullptr) NOT_CDS_JAVA_HEAP_RETURN; 196 static void stop_using_full_module_graph(const char* reason = nullptr) NOT_CDS_JAVA_HEAP_RETURN; 197 198 // --- AOT compiler 199 200 static bool is_dumping_cached_code() NOT_CDS_RETURN_(false); 201 static void disable_dumping_cached_code() NOT_CDS_RETURN; 202 static void enable_dumping_cached_code() NOT_CDS_RETURN; 203 204 static bool is_dumping_adapters() NOT_CDS_RETURN_(false); 205 206 // Are we using the (to be deprecated) -XX:CacheDataStore workflow? 207 static bool is_experimental_leyden_workflow() NOT_CDS_RETURN_(false); 208 209 // Some CDS functions assume that they are called only within a single-threaded context. I.e., 210 // they are called from: 211 // - The VM thread (e.g., inside VM_PopulateDumpSharedSpace) 212 // - The thread that performs prepatory steps before switching to the VM thread 213 // Since these two threads never execute concurrently, we can avoid using locks in these CDS 214 // function. For safety, these functions should assert with CDSConfig::current_thread_is_vm_or_dumper(). 215 class DumperThreadMark { 216 public: 217 DumperThreadMark(JavaThread* current); 218 ~DumperThreadMark(); 219 }; 220 221 static bool current_thread_is_vm_or_dumper() NOT_CDS_RETURN_(false); 222 }; 223 224 #endif // SHARE_CDS_CDSCONFIG_HPP --- EOF ---