1 /*
2 * Copyright (c) 2021, 2024, 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.
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23 */
24
25 #include "precompiled.hpp"
26 #include "cds/cdsConfig.hpp"
27 #include "cds/cdsProtectionDomain.hpp"
28 #include "classfile/classLoader.hpp"
29 #include "classfile/classLoaderData.inline.hpp"
30 #include "classfile/classLoaderExt.hpp"
31 #include "classfile/javaClasses.hpp"
32 #include "classfile/moduleEntry.hpp"
33 #include "classfile/systemDictionaryShared.hpp"
34 #include "classfile/vmClasses.hpp"
35 #include "classfile/vmSymbols.hpp"
36 #include "memory/oopFactory.hpp"
37 #include "memory/resourceArea.hpp"
38 #include "memory/universe.hpp"
39 #include "oops/instanceKlass.hpp"
40 #include "oops/symbol.hpp"
41 #include "runtime/javaCalls.hpp"
42
43 OopHandle CDSProtectionDomain::_shared_protection_domains;
44 OopHandle CDSProtectionDomain::_shared_jar_urls;
45 OopHandle CDSProtectionDomain::_shared_jar_manifests;
46
47 // Initializes the java.lang.Package and java.security.ProtectionDomain objects associated with
48 // the given InstanceKlass.
49 // Returns the ProtectionDomain for the InstanceKlass.
50 Handle CDSProtectionDomain::init_security_info(Handle class_loader, InstanceKlass* ik, PackageEntry* pkg_entry, TRAPS) {
51 int index = ik->shared_classpath_index();
52 assert(index >= 0, "Sanity");
53 SharedClassPathEntry* ent = FileMapInfo::shared_path(index);
54 Symbol* class_name = ik->name();
55
56 if (ent->is_modules_image()) {
57 // For shared app/platform classes originated from the run-time image:
58 // The ProtectionDomains are cached in the corresponding ModuleEntries
59 // for fast access by the VM.
60 // all packages from module image are already created during VM bootstrap in
61 // Modules::define_module().
62 assert(pkg_entry != nullptr, "archived class in module image cannot be from unnamed package");
63 Handle archived_pd = get_archived_protection_domain(THREAD, ik);
64 if (archived_pd.not_null()) {
65 return archived_pd;
66 }
67 ModuleEntry* mod_entry = pkg_entry->module();
68 return get_shared_protection_domain(class_loader, mod_entry, THREAD);
69 } else {
70 // For shared app/platform classes originated from JAR files on the class path:
71 // Each of the 3 SystemDictionaryShared::_shared_xxx arrays has the same length
72 // as the shared classpath table in the shared archive (see
73 // FileMap::_shared_path_table in filemap.hpp for details).
74 //
75 // If a shared InstanceKlass k is loaded from the class path, let
76 //
77 // index = k->shared_classpath_index():
78 //
79 // FileMap::_shared_path_table[index] identifies the JAR file that contains k.
80 //
81 // k's protection domain is:
82 //
83 // ProtectionDomain pd = _shared_protection_domains[index];
84 //
85 // and k's Package is initialized using
86 //
87 // manifest = _shared_jar_manifests[index];
88 // url = _shared_jar_urls[index];
89 // define_shared_package(class_name, class_loader, manifest, url, CHECK_NH);
90 //
91 // Note that if an element of these 3 _shared_xxx arrays is null, it will be initialized by
92 // the corresponding SystemDictionaryShared::get_shared_xxx() function.
93 Handle manifest = get_shared_jar_manifest(index, CHECK_NH);
94 Handle url = get_shared_jar_url(index, CHECK_NH);
95 if (!CDSConfig::is_loading_packages()) {
96 int index_offset = index - ClassLoaderExt::app_class_paths_start_index();
97 if (index_offset < PackageEntry::max_index_for_defined_in_class_path()) {
98 if (pkg_entry == nullptr || !pkg_entry->is_defined_by_cds_in_class_path(index_offset)) {
99 // define_shared_package only needs to be called once for each package in a jar specified
100 // in the shared class path.
101 define_shared_package(class_name, class_loader, manifest, url, CHECK_NH);
102 if (pkg_entry != nullptr) {
103 pkg_entry->set_defined_by_cds_in_class_path(index_offset);
104 }
105 }
106 } else {
107 define_shared_package(class_name, class_loader, manifest, url, CHECK_NH);
108 }
109 }
110 Handle archived_pd = get_archived_protection_domain(THREAD, ik);
111 if (archived_pd.not_null()) {
112 return archived_pd;
113 }
114 return get_shared_protection_domain(class_loader, index, url, THREAD);
115 }
116 }
117
118 Handle CDSProtectionDomain::get_package_name(Symbol* class_name, TRAPS) {
119 ResourceMark rm(THREAD);
120 Handle pkgname_string;
121 TempNewSymbol pkg = ClassLoader::package_from_class_name(class_name);
122 if (pkg != nullptr) { // Package prefix found
123 const char* pkgname = pkg->as_klass_external_name();
124 pkgname_string = java_lang_String::create_from_str(pkgname,
125 CHECK_(pkgname_string));
126 }
127 return pkgname_string;
128 }
129
130 PackageEntry* CDSProtectionDomain::get_package_entry_from_class(InstanceKlass* ik, Handle class_loader) {
131 PackageEntry* pkg_entry = ik->package();
132 if (CDSConfig::is_using_full_module_graph() && ik->is_shared() && pkg_entry != nullptr) {
133 assert(MetaspaceShared::is_in_shared_metaspace(pkg_entry), "must be");
134 assert(!ik->is_shared_unregistered_class(), "unexpected archived package entry for an unregistered class");
135 assert(ik->module()->is_named(), "unexpected archived package entry for a class in an unnamed module");
136 return pkg_entry;
137 }
138 TempNewSymbol pkg_name = ClassLoader::package_from_class_name(ik->name());
139 if (pkg_name != nullptr) {
140 pkg_entry = ClassLoaderData::class_loader_data(class_loader())->packages()->lookup_only(pkg_name);
141 } else {
142 pkg_entry = nullptr;
143 }
144 return pkg_entry;
145 }
146
147 // Define Package for shared app classes from JAR file and also checks for
148 // package sealing (all done in Java code)
149 // See http://docs.oracle.com/javase/tutorial/deployment/jar/sealman.html
150 void CDSProtectionDomain::define_shared_package(Symbol* class_name,
151 Handle class_loader,
152 Handle manifest,
153 Handle url,
154 TRAPS) {
155 assert(SystemDictionary::is_system_class_loader(class_loader()), "unexpected class loader");
156 // get_package_name() returns a null handle if the class is in unnamed package
157 Handle pkgname_string = get_package_name(class_name, CHECK);
158 if (pkgname_string.not_null()) {
159 Klass* app_classLoader_klass = vmClasses::jdk_internal_loader_ClassLoaders_AppClassLoader_klass();
160 JavaValue result(T_OBJECT);
161 JavaCallArguments args(3);
162 args.set_receiver(class_loader);
163 args.push_oop(pkgname_string);
164 args.push_oop(manifest);
165 args.push_oop(url);
166 JavaCalls::call_virtual(&result, app_classLoader_klass,
167 vmSymbols::defineOrCheckPackage_name(),
168 vmSymbols::defineOrCheckPackage_signature(),
169 &args,
170 CHECK);
171 }
172 }
173
174 Handle CDSProtectionDomain::create_jar_manifest(const char* manifest_chars, size_t size, TRAPS) {
175 typeArrayOop buf = oopFactory::new_byteArray((int)size, CHECK_NH);
176 typeArrayHandle bufhandle(THREAD, buf);
177 ArrayAccess<>::arraycopy_from_native(reinterpret_cast<const jbyte*>(manifest_chars),
178 buf, typeArrayOopDesc::element_offset<jbyte>(0), size);
179 Handle bais = JavaCalls::construct_new_instance(vmClasses::ByteArrayInputStream_klass(),
180 vmSymbols::byte_array_void_signature(),
181 bufhandle, CHECK_NH);
182 // manifest = new Manifest(ByteArrayInputStream)
183 Handle manifest = JavaCalls::construct_new_instance(vmClasses::Jar_Manifest_klass(),
184 vmSymbols::input_stream_void_signature(),
185 bais, CHECK_NH);
186 return manifest;
187 }
188
189 Handle CDSProtectionDomain::get_shared_jar_manifest(int shared_path_index, TRAPS) {
190 Handle manifest;
191 if (shared_jar_manifest(shared_path_index) == nullptr) {
192 SharedClassPathEntry* ent = FileMapInfo::shared_path(shared_path_index);
193 size_t size = (size_t)ent->manifest_size();
194 if (size == 0) {
195 return Handle();
196 }
197
198 // ByteArrayInputStream bais = new ByteArrayInputStream(buf);
199 const char* src = ent->manifest();
200 assert(src != nullptr, "No Manifest data");
201 manifest = create_jar_manifest(src, size, CHECK_NH);
202 atomic_set_shared_jar_manifest(shared_path_index, manifest());
203 }
204 manifest = Handle(THREAD, shared_jar_manifest(shared_path_index));
205 assert(manifest.not_null(), "sanity");
206 return manifest;
207 }
208
209 Handle CDSProtectionDomain::get_shared_jar_url(int shared_path_index, TRAPS) {
210 Handle url_h;
211 if (shared_jar_url(shared_path_index) == nullptr) {
212 const char* path = FileMapInfo::shared_path_name(shared_path_index);
213 oop result_oop = to_file_URL(path, url_h, CHECK_(url_h));
214 atomic_set_shared_jar_url(shared_path_index, result_oop);
215 }
216
217 url_h = Handle(THREAD, shared_jar_url(shared_path_index));
218 assert(url_h.not_null(), "sanity");
219 return url_h;
220 }
221
222
223 Handle CDSProtectionDomain::get_archived_protection_domain(JavaThread* current, InstanceKlass* klass) {
224 oop pd = nullptr;
225
226 if (CDSConfig::is_loading_protection_domains()) {
227 oop mirror;
228 if (klass->has_archived_mirror_index()) {
229 mirror = klass->archived_java_mirror();
230 } else {
231 mirror = klass->java_mirror();
232 }
233
234 if (mirror != nullptr) {
235 pd = java_lang_Class::protection_domain(mirror);
236 }
237 }
238
239 if (log_is_enabled(Info, cds, protectiondomain)) {
240 ResourceMark rm;
241 log_info(cds, protectiondomain)("Archived protection domain for %s = %s", klass->external_name(),
242 (pd == nullptr) ? "none" : "found");
243 }
244
245 if (pd == nullptr) {
246 return Handle();
247 } else {
248 return Handle(current, pd);
249 }
250 }
251
252 oop CDSProtectionDomain::to_file_URL(const char* path, Handle url_h, TRAPS) {
253 JavaValue result(T_OBJECT);
254 Handle path_string = java_lang_String::create_from_str(path, CHECK_NULL);
255 JavaCalls::call_static(&result,
256 vmClasses::jdk_internal_loader_ClassLoaders_klass(),
257 vmSymbols::toFileURL_name(),
258 vmSymbols::toFileURL_signature(),
259 path_string, CHECK_NULL);
260 return result.get_oop();
261 }
262
263 // Get the ProtectionDomain associated with the CodeSource from the classloader.
264 Handle CDSProtectionDomain::get_protection_domain_from_classloader(Handle class_loader,
265 Handle url, TRAPS) {
266 // CodeSource cs = new CodeSource(url, null);
267 Handle cs = JavaCalls::construct_new_instance(vmClasses::CodeSource_klass(),
268 vmSymbols::url_code_signer_array_void_signature(),
269 url, Handle(), CHECK_NH);
270
271 // protection_domain = SecureClassLoader.getProtectionDomain(cs);
272 Klass* secureClassLoader_klass = vmClasses::SecureClassLoader_klass();
273 JavaValue obj_result(T_OBJECT);
274 JavaCalls::call_virtual(&obj_result, class_loader, secureClassLoader_klass,
275 vmSymbols::getProtectionDomain_name(),
276 vmSymbols::getProtectionDomain_signature(),
277 cs, CHECK_NH);
278 return Handle(THREAD, obj_result.get_oop());
279 }
280
281 // Returns the ProtectionDomain associated with the JAR file identified by the url.
282 Handle CDSProtectionDomain::get_shared_protection_domain(Handle class_loader,
283 int shared_path_index,
284 Handle url,
285 TRAPS) {
286 Handle protection_domain;
287 if (shared_protection_domain(shared_path_index) == nullptr) {
288 Handle pd = get_protection_domain_from_classloader(class_loader, url, CHECK_NH);
289 atomic_set_shared_protection_domain(shared_path_index, pd());
290 }
291
292 // Acquire from the cache because if another thread beats the current one to
293 // set the shared protection_domain and the atomic_set fails, the current thread
294 // needs to get the updated protection_domain from the cache.
295 protection_domain = Handle(THREAD, shared_protection_domain(shared_path_index));
296 assert(protection_domain.not_null(), "sanity");
297 return protection_domain;
298 }
299
300 // Returns the ProtectionDomain associated with the moduleEntry.
301 Handle CDSProtectionDomain::get_shared_protection_domain(Handle class_loader,
302 ModuleEntry* mod, TRAPS) {
303 ClassLoaderData *loader_data = mod->loader_data();
304 if (mod->shared_protection_domain() == nullptr) {
305 Symbol* location = mod->location();
306 if (location != nullptr) {
307 Handle location_string = java_lang_String::create_from_symbol(
308 location, CHECK_NH);
309 Handle url;
310 JavaValue result(T_OBJECT);
311 if (location->starts_with("jrt:/")) {
312 url = JavaCalls::construct_new_instance(vmClasses::URL_klass(),
313 vmSymbols::string_void_signature(),
314 location_string, CHECK_NH);
315 } else {
316 Klass* classLoaders_klass =
317 vmClasses::jdk_internal_loader_ClassLoaders_klass();
318 JavaCalls::call_static(&result, classLoaders_klass, vmSymbols::toFileURL_name(),
319 vmSymbols::toFileURL_signature(),
320 location_string, CHECK_NH);
321 url = Handle(THREAD, result.get_oop());
322 }
323
324 Handle pd = get_protection_domain_from_classloader(class_loader, url,
325 CHECK_NH);
326 mod->set_shared_protection_domain(loader_data, pd);
327 }
328 }
329
330 Handle protection_domain(THREAD, mod->shared_protection_domain());
331 assert(protection_domain.not_null(), "sanity");
332 return protection_domain;
333 }
334
335 void CDSProtectionDomain::atomic_set_array_index(OopHandle array, int index, oop o) {
336 // Benign race condition: array.obj_at(index) may already be filled in.
337 // The important thing here is that all threads pick up the same result.
338 // It doesn't matter which racing thread wins, as long as only one
339 // result is used by all threads, and all future queries.
340 ((objArrayOop)array.resolve())->replace_if_null(index, o);
341 }
342
343 oop CDSProtectionDomain::shared_protection_domain(int index) {
344 return ((objArrayOop)_shared_protection_domains.resolve())->obj_at(index);
345 }
346
347 void CDSProtectionDomain::allocate_shared_protection_domain_array(int size, TRAPS) {
348 if (_shared_protection_domains.resolve() == nullptr) {
349 oop spd = oopFactory::new_objArray(
350 vmClasses::ProtectionDomain_klass(), size, CHECK);
351 _shared_protection_domains = OopHandle(Universe::vm_global(), spd);
352 }
353 }
354
355 oop CDSProtectionDomain::shared_jar_url(int index) {
356 return ((objArrayOop)_shared_jar_urls.resolve())->obj_at(index);
357 }
358
359 void CDSProtectionDomain::allocate_shared_jar_url_array(int size, TRAPS) {
360 if (_shared_jar_urls.resolve() == nullptr) {
361 oop sju = oopFactory::new_objArray(
362 vmClasses::URL_klass(), size, CHECK);
363 _shared_jar_urls = OopHandle(Universe::vm_global(), sju);
364 }
365 }
366
367 oop CDSProtectionDomain::shared_jar_manifest(int index) {
368 return ((objArrayOop)_shared_jar_manifests.resolve())->obj_at(index);
369 }
370
371 void CDSProtectionDomain::allocate_shared_jar_manifest_array(int size, TRAPS) {
372 if (_shared_jar_manifests.resolve() == nullptr) {
373 oop sjm = oopFactory::new_objArray(
374 vmClasses::Jar_Manifest_klass(), size, CHECK);
375 _shared_jar_manifests = OopHandle(Universe::vm_global(), sjm);
376 }
377 }