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