1 /*
2 * Copyright (c) 2016, 2019, 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 #include "precompiled.hpp"
25 #include "aot/aotCodeHeap.hpp"
26 #include "aot/aotLoader.inline.hpp"
27 #include "classfile/javaClasses.hpp"
28 #include "jvm.h"
29 #include "memory/allocation.inline.hpp"
30 #include "memory/resourceArea.hpp"
31 #include "oops/compressedOops.hpp"
32 #include "oops/method.hpp"
33 #include "runtime/handles.inline.hpp"
34 #include "runtime/mutexLocker.inline.hpp"
35 #include "runtime/os.inline.hpp"
36 #include "runtime/timerTrace.hpp"
37
38 GrowableArray<AOTCodeHeap*>* AOTLoader::_heaps = new(ResourceObj::C_HEAP, mtCode) GrowableArray<AOTCodeHeap*> (2, true);
39 GrowableArray<AOTLib*>* AOTLoader::_libraries = new(ResourceObj::C_HEAP, mtCode) GrowableArray<AOTLib*> (2, true);
40
41 // Iterate over all AOT CodeHeaps
42 #define FOR_ALL_AOT_HEAPS(heap) for (GrowableArrayIterator<AOTCodeHeap*> heap = heaps()->begin(); heap != heaps()->end(); ++heap)
43 // Iterate over all AOT Libraries
44 #define FOR_ALL_AOT_LIBRARIES(lib) for (GrowableArrayIterator<AOTLib*> lib = libraries()->begin(); lib != libraries()->end(); ++lib)
45
46 void AOTLoader::load_for_klass(InstanceKlass* ik, Thread* thread) {
47 if (ik->is_unsafe_anonymous()) {
48 // don't even bother
49 return;
50 }
51 if (UseAOT) {
52 // We allow hotswap to be enabled after the onload phase, but not breakpoints
53 assert(!JvmtiExport::can_post_breakpoint(), "AOT should have been disabled.");
54 FOR_ALL_AOT_HEAPS(heap) {
55 (*heap)->load_klass_data(ik, thread);
56 }
57 }
58 }
59
60 uint64_t AOTLoader::get_saved_fingerprint(InstanceKlass* ik) {
61 assert(UseAOT, "called only when AOT is enabled");
62 if (ik->is_unsafe_anonymous()) {
63 // don't even bother
64 return 0;
65 }
66 FOR_ALL_AOT_HEAPS(heap) {
67 AOTKlassData* klass_data = (*heap)->find_klass(ik);
68 if (klass_data != NULL) {
69 return klass_data->_fingerprint;
70 }
71 }
72 return 0;
73 }
74
75 void AOTLoader::oops_do(OopClosure* f) {
76 if (UseAOT) {
77 FOR_ALL_AOT_HEAPS(heap) {
78 (*heap)->oops_do(f);
79 }
80 }
81 }
82
83 void AOTLoader::metadata_do(MetadataClosure* f) {
84 if (UseAOT) {
85 FOR_ALL_AOT_HEAPS(heap) {
86 (*heap)->metadata_do(f);
87 }
88 }
89 }
90
91 void AOTLoader::mark_evol_dependent_methods(InstanceKlass* dependee) {
92 if (UseAOT) {
93 FOR_ALL_AOT_HEAPS(heap) {
94 (*heap)->mark_evol_dependent_methods(dependee);
95 }
96 }
97 }
98
99 /**
100 * List of core modules for which we search for shared libraries.
101 */
102 static const char* modules[] = {
103 "java.base",
104 "java.logging",
105 "jdk.compiler",
106 "jdk.scripting.nashorn",
107 "jdk.internal.vm.ci",
108 "jdk.internal.vm.compiler"
109 };
110
111 void AOTLoader::initialize() {
112 TraceTime timer("AOT initialization", TRACETIME_LOG(Info, aot, startuptime));
113
114 if (FLAG_IS_DEFAULT(UseAOT) && AOTLibrary != NULL) {
115 // Don't need to set UseAOT on command line when AOTLibrary is specified
116 FLAG_SET_DEFAULT(UseAOT, true);
117 }
118 if (UseAOT) {
119 // EagerInitialization is not compatible with AOT
120 if (EagerInitialization) {
121 if (PrintAOT) {
122 warning("EagerInitialization is not compatible with AOT (switching AOT off)");
123 }
124 FLAG_SET_DEFAULT(UseAOT, false);
125 return;
126 }
127
128 if (JvmtiExport::can_post_breakpoint()) {
129 if (PrintAOT) {
130 warning("JVMTI capability to post breakpoint is not compatible with AOT (switching AOT off)");
131 }
132 FLAG_SET_DEFAULT(UseAOT, false);
133 return;
134 }
135
136 // -Xint is not compatible with AOT
137 if (Arguments::is_interpreter_only()) {
138 if (PrintAOT) {
139 warning("-Xint is not compatible with AOT (switching AOT off)");
140 }
141 FLAG_SET_DEFAULT(UseAOT, false);
142 return;
143 }
144
145 #ifdef _WINDOWS
146 const char pathSep = ';';
147 #else
148 const char pathSep = ':';
149 #endif
150
151 // Scan the AOTLibrary option.
152 if (AOTLibrary != NULL) {
153 const int len = (int)strlen(AOTLibrary);
154 char* cp = NEW_C_HEAP_ARRAY(char, len+1, mtCode);
155 memcpy(cp, AOTLibrary, len);
156 cp[len] = '\0';
157 char* end = cp + len;
158 while (cp < end) {
159 const char* name = cp;
160 while ((*cp) != '\0' && (*cp) != '\n' && (*cp) != ',' && (*cp) != pathSep) cp++;
161 cp[0] = '\0'; // Terminate name
162 cp++;
163 load_library(name, true);
164 }
165 }
166
167 // Load well-know AOT libraries from Java installation directory.
168 const char* home = Arguments::get_java_home();
169 const char* file_separator = os::file_separator();
170
171 for (int i = 0; i < (int) (sizeof(modules) / sizeof(const char*)); i++) {
172 char library[JVM_MAXPATHLEN];
173 jio_snprintf(library, sizeof(library), "%s%slib%slib%s%s%s%s", home, file_separator, file_separator, modules[i], UseCompressedOops ? "-coop" : "", UseG1GC ? "" : "-nong1", os::dll_file_extension());
174 load_library(library, false);
175 }
176 }
177 }
178
179 void AOTLoader::universe_init() {
180 if (UseAOT && libraries_count() > 0) {
181 // Shifts are static values which initialized by 0 until java heap initialization.
182 // AOT libs are loaded before heap initialized so shift values are not set.
183 // It is okay since ObjectAlignmentInBytes flag which defines shifts value is set before AOT libs are loaded.
184 // AOT sets shift values during heap and metaspace initialization.
185 // Check shifts value to make sure thay did not change.
186 if (UseCompressedOops && AOTLib::narrow_oop_shift_initialized()) {
187 int oop_shift = CompressedOops::shift();
188 FOR_ALL_AOT_LIBRARIES(lib) {
189 (*lib)->verify_flag((*lib)->config()->_narrowOopShift, oop_shift, "CompressedOops::shift");
190 }
191 if (UseCompressedClassPointers) { // It is set only if UseCompressedOops is set
192 int klass_shift = CompressedKlassPointers::shift();
193 FOR_ALL_AOT_LIBRARIES(lib) {
194 (*lib)->verify_flag((*lib)->config()->_narrowKlassShift, klass_shift, "CompressedKlassPointers::shift");
195 }
196 }
197 }
198 // Create heaps for all valid libraries
199 FOR_ALL_AOT_LIBRARIES(lib) {
200 if ((*lib)->is_valid()) {
201 AOTCodeHeap* heap = new AOTCodeHeap(*lib);
202 {
203 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
204 add_heap(heap);
205 CodeCache::add_heap(heap);
206 }
207 } else {
208 // Unload invalid libraries
209 os::dll_unload((*lib)->dl_handle());
210 }
211 }
212 }
213 if (heaps_count() == 0) {
214 if (FLAG_IS_DEFAULT(UseAOT)) {
215 FLAG_SET_DEFAULT(UseAOT, false);
216 }
217 }
218 }
219
220 // Set shift value for compressed oops and classes based on first AOT library config.
221 // AOTLoader::universe_init(), which is called later, will check the shift value again to make sure nobody change it.
222 // This code is not executed during CDS dump because it runs in Interpreter mode and AOT is disabled in this mode.
223
224 void AOTLoader::set_narrow_oop_shift() {
225 // This method is called from Universe::initialize_heap().
226 if (UseAOT && libraries_count() > 0 &&
227 UseCompressedOops && AOTLib::narrow_oop_shift_initialized()) {
228 if (CompressedOops::shift() == 0) {
229 // 0 is valid shift value for small heap but we can safely increase it
230 // at this point when nobody used it yet.
231 CompressedOops::set_shift(AOTLib::narrow_oop_shift());
232 }
233 }
234 }
235
236 void AOTLoader::set_narrow_klass_shift() {
237 // This method is called from Metaspace::set_narrow_klass_base_and_shift().
238 if (UseAOT && libraries_count() > 0 &&
239 UseCompressedOops && AOTLib::narrow_oop_shift_initialized() &&
240 UseCompressedClassPointers) {
241 if (CompressedKlassPointers::shift() == 0) {
242 CompressedKlassPointers::set_shift(AOTLib::narrow_klass_shift());
243 }
244 }
245 }
246
247 void AOTLoader::load_library(const char* name, bool exit_on_error) {
248 // Skip library if a library with the same name is already loaded.
249 const int file_separator = *os::file_separator();
250 const char* start = strrchr(name, file_separator);
251 const char* new_name = (start == NULL) ? name : (start + 1);
252 FOR_ALL_AOT_LIBRARIES(lib) {
253 const char* lib_name = (*lib)->name();
254 start = strrchr(lib_name, file_separator);
255 const char* old_name = (start == NULL) ? lib_name : (start + 1);
256 if (strcmp(old_name, new_name) == 0) {
257 if (PrintAOT) {
258 warning("AOT library %s is already loaded as %s.", name, lib_name);
259 }
260 return;
261 }
262 }
263 char ebuf[1024];
264 void* handle = os::dll_load(name, ebuf, sizeof ebuf);
265 if (handle == NULL) {
266 if (exit_on_error) {
267 tty->print_cr("error opening file: %s", ebuf);
268 vm_exit(1);
269 }
270 return;
271 }
272 const int dso_id = libraries_count() + 1;
273 AOTLib* lib = new AOTLib(handle, name, dso_id);
274 if (!lib->is_valid()) {
275 delete lib;
276 os::dll_unload(handle);
277 return;
278 }
279 add_library(lib);
280 }
281
282 #ifndef PRODUCT
283 void AOTLoader::print_statistics() {
284 { ttyLocker ttyl;
285 tty->print_cr("--- AOT Statistics ---");
286 tty->print_cr("AOT libraries loaded: %d", heaps_count());
287 AOTCodeHeap::print_statistics();
288 }
289 }
290 #endif
291
292
293 bool AOTLoader::reconcile_dynamic_invoke(InstanceKlass* holder, int index, Method* adapter_method, Klass* appendix_klass) {
294 if (!UseAOT) {
295 return true;
296 }
297 JavaThread* thread = JavaThread::current();
298 ResourceMark rm(thread);
299 RegisterMap map(thread, false);
300 frame caller_frame = thread->last_frame().sender(&map); // Skip stub
301 CodeBlob* caller_cb = caller_frame.cb();
302 guarantee(caller_cb != NULL && caller_cb->is_compiled(), "must be called from compiled method");
303 CompiledMethod* cm = caller_cb->as_compiled_method();
304
305 if (!cm->is_aot()) {
306 return true;
307 }
308 AOTCompiledMethod* aot = (AOTCompiledMethod*)cm;
309
310 AOTCodeHeap* caller_heap = NULL;
311 FOR_ALL_AOT_HEAPS(heap) {
312 if ((*heap)->contains_blob(aot)) {
313 caller_heap = *heap;
314 break;
315 }
316 }
317 guarantee(caller_heap != NULL, "CodeHeap not found");
318 bool success = caller_heap->reconcile_dynamic_invoke(aot, holder, index, adapter_method, appendix_klass);
319 vmassert(success || thread->last_frame().sender(&map).is_deoptimized_frame(), "caller not deoptimized on failure");
320 return success;
321 }
322
323
324 // This should be called very early during startup before any of the AOTed methods that use boxes can deoptimize.
325 // Deoptimization machinery expects the caches to be present and populated.
326 void AOTLoader::initialize_box_caches(TRAPS) {
327 if (!UseAOT || libraries_count() == 0) {
328 return;
329 }
330 TraceTime timer("AOT initialization of box caches", TRACETIME_LOG(Info, aot, startuptime));
331 Symbol* box_classes[] = { java_lang_Boolean::symbol(), java_lang_Byte_ByteCache::symbol(),
332 java_lang_Short_ShortCache::symbol(), java_lang_Character_CharacterCache::symbol(),
333 java_lang_Integer_IntegerCache::symbol(), java_lang_Long_LongCache::symbol() };
334
335 for (unsigned i = 0; i < sizeof(box_classes) / sizeof(Symbol*); i++) {
336 Klass* k = SystemDictionary::resolve_or_fail(box_classes[i], true, CHECK);
337 InstanceKlass* ik = InstanceKlass::cast(k);
338 if (ik->is_not_initialized()) {
339 ik->initialize(CHECK);
340 }
341 }
342 }