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src/hotspot/share/classfile/classLoaderExt.cpp

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  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 #include "precompiled.hpp"
  26 #include "classfile/classFileParser.hpp"
  27 #include "classfile/classFileStream.hpp"
  28 #include "classfile/classLoader.inline.hpp"
  29 #include "classfile/classLoaderExt.hpp"
  30 #include "classfile/classLoaderData.inline.hpp"
  31 #include "classfile/klassFactory.hpp"
  32 #include "classfile/modules.hpp"

  33 #include "classfile/systemDictionaryShared.hpp"
  34 #include "classfile/vmSymbols.hpp"
  35 #include "memory/allocation.inline.hpp"
  36 #include "memory/filemap.hpp"
  37 #include "memory/resourceArea.hpp"
  38 #include "oops/instanceKlass.hpp"
  39 #include "oops/oop.inline.hpp"
  40 #include "oops/symbol.hpp"
  41 #include "runtime/arguments.hpp"
  42 #include "runtime/handles.inline.hpp"
  43 #include "runtime/java.hpp"
  44 #include "runtime/javaCalls.hpp"
  45 #include "runtime/os.hpp"
  46 #include "services/threadService.hpp"
  47 #include "utilities/stringUtils.hpp"
  48 
  49 jshort ClassLoaderExt::_app_class_paths_start_index = ClassLoaderExt::max_classpath_index;
  50 jshort ClassLoaderExt::_app_module_paths_start_index = ClassLoaderExt::max_classpath_index;
  51 jshort ClassLoaderExt::_max_used_path_index = 0;
  52 bool ClassLoaderExt::_has_app_classes = false;


  56   if (UseSharedSpaces) {
  57     warning("Sharing is only supported for boot loader classes because bootstrap classpath has been appended");
  58     FileMapInfo::current_info()->header()->set_has_platform_or_app_classes(false);
  59   }
  60   ClassLoader::add_to_boot_append_entries(new_entry);
  61 }
  62 
  63 void ClassLoaderExt::setup_app_search_path() {
  64   assert(DumpSharedSpaces || DynamicDumpSharedSpaces,
  65          "this function is only used at CDS dump time");
  66   _app_class_paths_start_index = ClassLoader::num_boot_classpath_entries();
  67   char* app_class_path = os::strdup(Arguments::get_appclasspath());
  68 
  69   if (strcmp(app_class_path, ".") == 0) {
  70     // This doesn't make any sense, even for AppCDS, so let's skip it. We
  71     // don't want to throw an error here because -cp "." is usually assigned
  72     // by the launcher when classpath is not specified.
  73     trace_class_path("app loader class path (skipped)=", app_class_path);
  74   } else {
  75     trace_class_path("app loader class path=", app_class_path);

  76     ClassLoader::setup_app_search_path(app_class_path);
  77   }
  78 }
  79 
  80 void ClassLoaderExt::process_module_table(ModuleEntryTable* met, TRAPS) {
  81   ResourceMark rm(THREAD);
  82   for (int i = 0; i < met->table_size(); i++) {
  83     for (ModuleEntry* m = met->bucket(i); m != NULL;) {
  84       char* path = m->location()->as_C_string();
  85       if (strncmp(path, "file:", 5) == 0) {
  86         path = ClassLoader::skip_uri_protocol(path);
  87         ClassLoader::setup_module_search_path(path, THREAD);
  88       }
  89       m = m->next();
  90     }
  91   }
  92 }
  93 void ClassLoaderExt::setup_module_paths(TRAPS) {
  94   assert(DumpSharedSpaces || DynamicDumpSharedSpaces,
  95          "this function is only used with CDS dump time");


 193     // Split the cp_attr by spaces, and add each file
 194     char* file_start = cp_attr;
 195     char* end = file_start + strlen(file_start);
 196 
 197     while (file_start < end) {
 198       char* file_end = strchr(file_start, ' ');
 199       if (file_end != NULL) {
 200         *file_end = 0;
 201         file_end += 1;
 202       } else {
 203         file_end = end;
 204       }
 205 
 206       size_t name_len = strlen(file_start);
 207       if (name_len > 0) {
 208         ResourceMark rm(THREAD);
 209         size_t libname_len = dir_len + name_len;
 210         char* libname = NEW_RESOURCE_ARRAY(char, libname_len + 1);
 211         int n = os::snprintf(libname, libname_len + 1, "%.*s%s", dir_len, dir_name, file_start);
 212         assert((size_t)n == libname_len, "Unexpected number of characters in string");
 213         if (ClassLoader::update_class_path_entry_list(libname, true, false, true /* from_class_path_attr */)) {
 214           trace_class_path("library = ", libname);
 215         } else {
 216           trace_class_path("library (non-existent) = ", libname);
 217           FileMapInfo::record_non_existent_class_path_entry(libname);
 218         }
 219       }
 220 
 221       file_start = file_end;
 222     }
 223   }
 224 }
 225 
 226 void ClassLoaderExt::setup_search_paths() {

 227   ClassLoaderExt::setup_app_search_path();
 228 }
 229 
 230 void ClassLoaderExt::record_result(const s2 classpath_index,
 231                                    InstanceKlass* result,
 232                                    TRAPS) {
 233   assert(DumpSharedSpaces || DynamicDumpSharedSpaces, "Sanity");
 234 
 235   // We need to remember where the class comes from during dumping.
 236   oop loader = result->class_loader();
 237   s2 classloader_type = ClassLoader::BOOT_LOADER;
 238   if (SystemDictionary::is_system_class_loader(loader)) {
 239     classloader_type = ClassLoader::APP_LOADER;
 240     ClassLoaderExt::set_has_app_classes();
 241   } else if (SystemDictionary::is_platform_class_loader(loader)) {
 242     classloader_type = ClassLoader::PLATFORM_LOADER;
 243     ClassLoaderExt::set_has_platform_classes();
 244   }
 245   if (classpath_index > ClassLoaderExt::max_used_path_index()) {
 246     ClassLoaderExt::set_max_used_path_index(classpath_index);
 247   }
 248   result->set_shared_classpath_index(classpath_index);
 249   result->set_class_loader_type(classloader_type);
 250 }
 251 






 252 // Load the class of the given name from the location given by path. The path is specified by
 253 // the "source:" in the class list file (see classListParser.cpp), and can be a directory or
 254 // a JAR file.
 255 InstanceKlass* ClassLoaderExt::load_class(Symbol* name, const char* path, TRAPS) {
 256   assert(name != NULL, "invariant");
 257   assert(DumpSharedSpaces, "this function is only used with -Xshare:dump");
 258   ResourceMark rm(THREAD);
 259   const char* class_name = name->as_C_string();
 260 
 261   const char* file_name = file_name_for_class_name(class_name,
 262                                                    name->utf8_length());
 263   assert(file_name != NULL, "invariant");
 264 
 265   // Lookup stream for parsing .class file
 266   ClassFileStream* stream = NULL;
 267   ClassPathEntry* e = find_classpath_entry_from_cache(path, CHECK_NULL);
 268   if (e == NULL) {
 269     return NULL;
 270   }
 271   {


 317   CachedClassPathEntry ccpe;
 318   for (int i=0; i<cached_path_entries->length(); i++) {
 319     ccpe = cached_path_entries->at(i);
 320     if (strcmp(ccpe._path, path) == 0) {
 321       if (i != 0) {
 322         // Put recent entries at the beginning to speed up searches.
 323         cached_path_entries->remove_at(i);
 324         cached_path_entries->insert_before(0, ccpe);
 325       }
 326       return ccpe._entry;
 327     }
 328   }
 329 
 330   struct stat st;
 331   if (os::stat(path, &st) != 0) {
 332     // File or directory not found
 333     return NULL;
 334   }
 335   ClassPathEntry* new_entry = NULL;
 336 
 337   new_entry = create_class_path_entry(path, &st, false, false, false, CHECK_NULL);
 338   if (new_entry == NULL) {
 339     return NULL;
 340   }
 341   ccpe._path = strdup(path);
 342   ccpe._entry = new_entry;
 343   cached_path_entries->insert_before(0, ccpe);
 344   return new_entry;
 345 }


  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 #include "precompiled.hpp"
  26 #include "classfile/classFileParser.hpp"
  27 #include "classfile/classFileStream.hpp"
  28 #include "classfile/classLoader.inline.hpp"
  29 #include "classfile/classLoaderExt.hpp"
  30 #include "classfile/classLoaderData.inline.hpp"
  31 #include "classfile/klassFactory.hpp"
  32 #include "classfile/modules.hpp"
  33 #include "classfile/sharedPathsMiscInfo.hpp"
  34 #include "classfile/systemDictionaryShared.hpp"
  35 #include "classfile/vmSymbols.hpp"
  36 #include "memory/allocation.inline.hpp"
  37 #include "memory/filemap.hpp"
  38 #include "memory/resourceArea.hpp"
  39 #include "oops/instanceKlass.hpp"
  40 #include "oops/oop.inline.hpp"
  41 #include "oops/symbol.hpp"
  42 #include "runtime/arguments.hpp"
  43 #include "runtime/handles.inline.hpp"
  44 #include "runtime/java.hpp"
  45 #include "runtime/javaCalls.hpp"
  46 #include "runtime/os.hpp"
  47 #include "services/threadService.hpp"
  48 #include "utilities/stringUtils.hpp"
  49 
  50 jshort ClassLoaderExt::_app_class_paths_start_index = ClassLoaderExt::max_classpath_index;
  51 jshort ClassLoaderExt::_app_module_paths_start_index = ClassLoaderExt::max_classpath_index;
  52 jshort ClassLoaderExt::_max_used_path_index = 0;
  53 bool ClassLoaderExt::_has_app_classes = false;


  57   if (UseSharedSpaces) {
  58     warning("Sharing is only supported for boot loader classes because bootstrap classpath has been appended");
  59     FileMapInfo::current_info()->header()->set_has_platform_or_app_classes(false);
  60   }
  61   ClassLoader::add_to_boot_append_entries(new_entry);
  62 }
  63 
  64 void ClassLoaderExt::setup_app_search_path() {
  65   assert(DumpSharedSpaces || DynamicDumpSharedSpaces,
  66          "this function is only used at CDS dump time");
  67   _app_class_paths_start_index = ClassLoader::num_boot_classpath_entries();
  68   char* app_class_path = os::strdup(Arguments::get_appclasspath());
  69 
  70   if (strcmp(app_class_path, ".") == 0) {
  71     // This doesn't make any sense, even for AppCDS, so let's skip it. We
  72     // don't want to throw an error here because -cp "." is usually assigned
  73     // by the launcher when classpath is not specified.
  74     trace_class_path("app loader class path (skipped)=", app_class_path);
  75   } else {
  76     trace_class_path("app loader class path=", app_class_path);
  77     shared_paths_misc_info()->add_app_classpath(app_class_path);
  78     ClassLoader::setup_app_search_path(app_class_path);
  79   }
  80 }
  81 
  82 void ClassLoaderExt::process_module_table(ModuleEntryTable* met, TRAPS) {
  83   ResourceMark rm(THREAD);
  84   for (int i = 0; i < met->table_size(); i++) {
  85     for (ModuleEntry* m = met->bucket(i); m != NULL;) {
  86       char* path = m->location()->as_C_string();
  87       if (strncmp(path, "file:", 5) == 0) {
  88         path = ClassLoader::skip_uri_protocol(path);
  89         ClassLoader::setup_module_search_path(path, THREAD);
  90       }
  91       m = m->next();
  92     }
  93   }
  94 }
  95 void ClassLoaderExt::setup_module_paths(TRAPS) {
  96   assert(DumpSharedSpaces || DynamicDumpSharedSpaces,
  97          "this function is only used with CDS dump time");


 195     // Split the cp_attr by spaces, and add each file
 196     char* file_start = cp_attr;
 197     char* end = file_start + strlen(file_start);
 198 
 199     while (file_start < end) {
 200       char* file_end = strchr(file_start, ' ');
 201       if (file_end != NULL) {
 202         *file_end = 0;
 203         file_end += 1;
 204       } else {
 205         file_end = end;
 206       }
 207 
 208       size_t name_len = strlen(file_start);
 209       if (name_len > 0) {
 210         ResourceMark rm(THREAD);
 211         size_t libname_len = dir_len + name_len;
 212         char* libname = NEW_RESOURCE_ARRAY(char, libname_len + 1);
 213         int n = os::snprintf(libname, libname_len + 1, "%.*s%s", dir_len, dir_name, file_start);
 214         assert((size_t)n == libname_len, "Unexpected number of characters in string");
 215         trace_class_path("library = ", libname);
 216         ClassLoader::update_class_path_entry_list(libname, true, false);




 217       }
 218 
 219       file_start = file_end;
 220     }
 221   }
 222 }
 223 
 224 void ClassLoaderExt::setup_search_paths() {
 225   shared_paths_misc_info()->record_app_offset();
 226   ClassLoaderExt::setup_app_search_path();
 227 }
 228 
 229 void ClassLoaderExt::record_result(const s2 classpath_index,
 230                                    InstanceKlass* result,
 231                                    TRAPS) {
 232   assert(DumpSharedSpaces || DynamicDumpSharedSpaces, "Sanity");
 233 
 234   // We need to remember where the class comes from during dumping.
 235   oop loader = result->class_loader();
 236   s2 classloader_type = ClassLoader::BOOT_LOADER;
 237   if (SystemDictionary::is_system_class_loader(loader)) {
 238     classloader_type = ClassLoader::APP_LOADER;
 239     ClassLoaderExt::set_has_app_classes();
 240   } else if (SystemDictionary::is_platform_class_loader(loader)) {
 241     classloader_type = ClassLoader::PLATFORM_LOADER;
 242     ClassLoaderExt::set_has_platform_classes();
 243   }
 244   if (classpath_index > ClassLoaderExt::max_used_path_index()) {
 245     ClassLoaderExt::set_max_used_path_index(classpath_index);
 246   }
 247   result->set_shared_classpath_index(classpath_index);
 248   result->set_class_loader_type(classloader_type);
 249 }
 250 
 251 void ClassLoaderExt::finalize_shared_paths_misc_info() {
 252   if (!_has_app_classes) {
 253     shared_paths_misc_info()->pop_app();
 254   }
 255 }
 256 
 257 // Load the class of the given name from the location given by path. The path is specified by
 258 // the "source:" in the class list file (see classListParser.cpp), and can be a directory or
 259 // a JAR file.
 260 InstanceKlass* ClassLoaderExt::load_class(Symbol* name, const char* path, TRAPS) {
 261   assert(name != NULL, "invariant");
 262   assert(DumpSharedSpaces, "this function is only used with -Xshare:dump");
 263   ResourceMark rm(THREAD);
 264   const char* class_name = name->as_C_string();
 265 
 266   const char* file_name = file_name_for_class_name(class_name,
 267                                                    name->utf8_length());
 268   assert(file_name != NULL, "invariant");
 269 
 270   // Lookup stream for parsing .class file
 271   ClassFileStream* stream = NULL;
 272   ClassPathEntry* e = find_classpath_entry_from_cache(path, CHECK_NULL);
 273   if (e == NULL) {
 274     return NULL;
 275   }
 276   {


 322   CachedClassPathEntry ccpe;
 323   for (int i=0; i<cached_path_entries->length(); i++) {
 324     ccpe = cached_path_entries->at(i);
 325     if (strcmp(ccpe._path, path) == 0) {
 326       if (i != 0) {
 327         // Put recent entries at the beginning to speed up searches.
 328         cached_path_entries->remove_at(i);
 329         cached_path_entries->insert_before(0, ccpe);
 330       }
 331       return ccpe._entry;
 332     }
 333   }
 334 
 335   struct stat st;
 336   if (os::stat(path, &st) != 0) {
 337     // File or directory not found
 338     return NULL;
 339   }
 340   ClassPathEntry* new_entry = NULL;
 341 
 342   new_entry = create_class_path_entry(path, &st, false, false, CHECK_NULL);
 343   if (new_entry == NULL) {
 344     return NULL;
 345   }
 346   ccpe._path = strdup(path);
 347   ccpe._entry = new_entry;
 348   cached_path_entries->insert_before(0, ccpe);
 349   return new_entry;
 350 }
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