1 /*
2 * Copyright (c) 2016, 2018, 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 "jvm.h"
26
27 #include "aot/aotCodeHeap.hpp"
28 #include "aot/aotLoader.inline.hpp"
29 #include "jvmci/jvmciRuntime.hpp"
30 #include "memory/allocation.inline.hpp"
31 #include "oops/method.hpp"
32 #include "runtime/handles.inline.hpp"
33 #include "runtime/os.hpp"
34 #include "runtime/timerTrace.hpp"
35
36 GrowableArray<AOTCodeHeap*>* AOTLoader::_heaps = new(ResourceObj::C_HEAP, mtCode) GrowableArray<AOTCodeHeap*> (2, true);
37 GrowableArray<AOTLib*>* AOTLoader::_libraries = new(ResourceObj::C_HEAP, mtCode) GrowableArray<AOTLib*> (2, true);
38
39 // Iterate over all AOT CodeHeaps
40 #define FOR_ALL_AOT_HEAPS(heap) for (GrowableArrayIterator<AOTCodeHeap*> heap = heaps()->begin(); heap != heaps()->end(); ++heap)
41 // Iterate over all AOT Libraries
42 #define FOR_ALL_AOT_LIBRARIES(lib) for (GrowableArrayIterator<AOTLib*> lib = libraries()->begin(); lib != libraries()->end(); ++lib)
43
44 void AOTLoader::load_for_klass(InstanceKlass* ik, Thread* thread) {
45 if (ik->is_anonymous()) {
46 // don't even bother
47 return;
48 }
49 if (UseAOT) {
50 FOR_ALL_AOT_HEAPS(heap) {
51 (*heap)->load_klass_data(ik, thread);
52 }
53 }
54 }
55
56 uint64_t AOTLoader::get_saved_fingerprint(InstanceKlass* ik) {
57 if (ik->is_anonymous()) {
58 // don't even bother
59 return 0;
60 }
61 FOR_ALL_AOT_HEAPS(heap) {
62 AOTKlassData* klass_data = (*heap)->find_klass(ik);
63 if (klass_data != NULL) {
64 return klass_data->_fingerprint;
65 }
66 }
67 return 0;
68 }
69
70 bool AOTLoader::find_klass(InstanceKlass* ik) {
71 FOR_ALL_AOT_HEAPS(heap) {
72 if ((*heap)->find_klass(ik) != NULL) {
73 return true;
74 }
75 }
76 return false;
77 }
78
79 bool AOTLoader::contains(address p) {
80 FOR_ALL_AOT_HEAPS(heap) {
81 if ((*heap)->contains(p)) {
82 return true;
83 }
84 }
85 return false;
86 }
87
88 void AOTLoader::oops_do(OopClosure* f) {
89 if (UseAOT) {
90 FOR_ALL_AOT_HEAPS(heap) {
91 (*heap)->oops_do(f);
92 }
93 }
94 }
95
96 void AOTLoader::metadata_do(void f(Metadata*)) {
97 if (UseAOT) {
98 FOR_ALL_AOT_HEAPS(heap) {
99 (*heap)->metadata_do(f);
100 }
101 }
102 }
103
104 // Flushing and deoptimization in case of evolution
105 void AOTLoader::flush_evol_dependents_on(InstanceKlass* dependee) {
106 // make non entrant and mark for deoptimization
107 FOR_ALL_AOT_HEAPS(heap) {
108 (*heap)->flush_evol_dependents_on(dependee);
109 }
110 Deoptimization::deoptimize_dependents();
111 }
112
113 /**
114 * List of core modules for which we search for shared libraries.
115 */
116 static const char* modules[] = {
117 "java.base",
118 "java.logging",
119 "jdk.compiler",
120 "jdk.scripting.nashorn",
121 "jdk.internal.vm.ci",
122 "jdk.internal.vm.compiler"
123 };
124
125 void AOTLoader::initialize() {
126 TraceTime timer("AOT initialization", TRACETIME_LOG(Info, aot, startuptime));
127
128 if (FLAG_IS_DEFAULT(UseAOT) && AOTLibrary != NULL) {
129 // Don't need to set UseAOT on command line when AOTLibrary is specified
130 FLAG_SET_DEFAULT(UseAOT, true);
131 }
132 if (UseAOT) {
133 // EagerInitialization is not compatible with AOT
134 if (EagerInitialization) {
135 if (PrintAOT) {
136 warning("EagerInitialization is not compatible with AOT (switching AOT off)");
137 }
138 FLAG_SET_DEFAULT(UseAOT, false);
139 return;
140 }
141
142 // -Xint is not compatible with AOT
143 if (Arguments::is_interpreter_only()) {
144 if (PrintAOT) {
145 warning("-Xint is not compatible with AOT (switching AOT off)");
146 }
147 FLAG_SET_DEFAULT(UseAOT, false);
148 return;
149 }
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 if (cp != NULL) { // No memory?
156 memcpy(cp, AOTLibrary, len);
157 cp[len] = '\0';
158 char* end = cp + len;
159 while (cp < end) {
160 const char* name = cp;
161 while ((*cp) != '\0' && (*cp) != '\n' && (*cp) != ',' && (*cp) != ':' && (*cp) != ';') cp++;
162 cp[0] = '\0'; // Terminate name
163 cp++;
164 load_library(name, true);
165 }
166 }
167 }
168
169 // Load well-know AOT libraries from Java installation directory.
170 const char* home = Arguments::get_java_home();
171 const char* file_separator = os::file_separator();
172
173 for (int i = 0; i < (int) (sizeof(modules) / sizeof(const char*)); i++) {
174 char library[JVM_MAXPATHLEN];
175 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());
176 load_library(library, false);
177 }
178 }
179 }
180
181 void AOTLoader::universe_init() {
182 if (UseAOT && libraries_count() > 0) {
183 // Shifts are static values which initialized by 0 until java heap initialization.
184 // AOT libs are loaded before heap initialized so shift values are not set.
185 // It is okay since ObjectAlignmentInBytes flag which defines shifts value is set before AOT libs are loaded.
186 // AOT sets shift values during heap and metaspace initialization.
187 // Check shifts value to make sure thay did not change.
188 if (UseCompressedOops && AOTLib::narrow_oop_shift_initialized()) {
189 int oop_shift = Universe::narrow_oop_shift();
190 FOR_ALL_AOT_LIBRARIES(lib) {
191 (*lib)->verify_flag(AOTLib::narrow_oop_shift(), oop_shift, "Universe::narrow_oop_shift");
192 }
193 if (UseCompressedClassPointers) { // It is set only if UseCompressedOops is set
194 int klass_shift = Universe::narrow_klass_shift();
195 FOR_ALL_AOT_LIBRARIES(lib) {
196 (*lib)->verify_flag(AOTLib::narrow_klass_shift(), klass_shift, "Universe::narrow_klass_shift");
197 }
198 }
199 }
200 // Create heaps for all valid libraries
201 FOR_ALL_AOT_LIBRARIES(lib) {
202 if ((*lib)->is_valid()) {
203 AOTCodeHeap* heap = new AOTCodeHeap(*lib);
204 {
205 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
206 add_heap(heap);
207 CodeCache::add_heap(heap);
208 }
209 } else {
210 // Unload invalid libraries
211 os::dll_unload((*lib)->dl_handle());
212 }
213 }
214 }
215 if (heaps_count() == 0) {
216 if (FLAG_IS_DEFAULT(UseAOT)) {
217 FLAG_SET_DEFAULT(UseAOT, false);
218 }
219 }
220 }
221
222 // Set shift value for compressed oops and classes based on first AOT library config.
223 // AOTLoader::universe_init(), which is called later, will check the shift value again to make sure nobody change it.
224 // This code is not executed during CDS dump because it runs in Interpreter mode and AOT is disabled in this mode.
225
226 void AOTLoader::set_narrow_oop_shift() {
227 // This method could be called from Universe::initialize_heap().
228 if (UseAOT && libraries_count() > 0 &&
229 UseCompressedOops && AOTLib::narrow_oop_shift_initialized()) {
230 int oop_shift = Universe::narrow_oop_shift();
231 if (oop_shift == 0) {
232 // 0 is valid shift value for small heap but we can safely increase it
233 // at this point when nobody used it yet.
234 Universe::set_narrow_oop_shift(AOTLib::narrow_oop_shift());
235 } else {
236 // Non 0 value can't be changed because we can't decrease it.
237 FOR_ALL_AOT_LIBRARIES(lib) {
238 (*lib)->verify_flag(AOTLib::narrow_oop_shift(), oop_shift, "Universe::narrow_oop_shift");
239 }
240 }
241 }
242 }
243
244 void AOTLoader::set_narrow_klass_shift() {
245 // This method is called from Metaspace::set_narrow_klass_base_and_shift().
246 if (UseAOT && libraries_count() > 0 &&
247 UseCompressedOops && AOTLib::narrow_oop_shift_initialized() &&
248 UseCompressedClassPointers) {
249 int klass_shift = Universe::narrow_klass_shift();
250 if (klass_shift == 0) {
251 Universe::set_narrow_klass_shift(AOTLib::narrow_klass_shift());
252 } else {
253 FOR_ALL_AOT_LIBRARIES(lib) {
254 (*lib)->verify_flag(AOTLib::narrow_klass_shift(), klass_shift, "Universe::narrow_klass_shift");
255 }
256 }
257 }
258 }
259
260 void AOTLoader::load_library(const char* name, bool exit_on_error) {
261 // Skip library if a library with the same name is already loaded.
262 const int file_separator = *os::file_separator();
263 const char* start = strrchr(name, file_separator);
264 const char* new_name = (start == NULL) ? name : (start + 1);
265 FOR_ALL_AOT_LIBRARIES(lib) {
266 const char* lib_name = (*lib)->name();
267 start = strrchr(lib_name, file_separator);
268 const char* old_name = (start == NULL) ? lib_name : (start + 1);
269 if (strcmp(old_name, new_name) == 0) {
270 if (PrintAOT) {
271 warning("AOT library %s is already loaded as %s.", name, lib_name);
272 }
273 return;
274 }
275 }
276 char ebuf[1024];
277 void* handle = os::dll_load(name, ebuf, sizeof ebuf);
278 if (handle == NULL) {
279 if (exit_on_error) {
280 tty->print_cr("error opening file: %s", ebuf);
281 vm_exit(1);
282 }
283 return;
284 }
285 const int dso_id = libraries_count() + 1;
286 AOTLib* lib = new AOTLib(handle, name, dso_id);
287 if (!lib->is_valid()) {
288 delete lib;
289 os::dll_unload(handle);
290 return;
291 }
292 add_library(lib);
293 }
294
295 #ifndef PRODUCT
296 void AOTLoader::print_statistics() {
297 { ttyLocker ttyl;
298 tty->print_cr("--- AOT Statistics ---");
299 tty->print_cr("AOT libraries loaded: %d", heaps_count());
300 AOTCodeHeap::print_statistics();
301 }
302 }
303 #endif
304
305
306 bool AOTLoader::reconcile_dynamic_invoke(InstanceKlass* holder, int index, Method* adapter_method, Klass* appendix_klass) {
307 if (!UseAOT) {
308 return true;
309 }
310 JavaThread* thread = JavaThread::current();
311 ResourceMark rm(thread);
312 RegisterMap map(thread, false);
313 frame caller_frame = thread->last_frame().sender(&map); // Skip stub
314 CodeBlob* caller_cb = caller_frame.cb();
315 guarantee(caller_cb != NULL && caller_cb->is_compiled(), "must be called from compiled method");
316 CompiledMethod* cm = caller_cb->as_compiled_method();
317
318 if (!cm->is_aot()) {
319 return true;
320 }
321 AOTCompiledMethod* aot = (AOTCompiledMethod*)cm;
322
323 AOTCodeHeap* caller_heap = NULL;
324 FOR_ALL_AOT_HEAPS(heap) {
325 if ((*heap)->contains_blob(aot)) {
326 caller_heap = *heap;
327 break;
328 }
329 }
330 guarantee(caller_heap != NULL, "CodeHeap not found");
331 bool success = caller_heap->reconcile_dynamic_invoke(aot, holder, index, adapter_method, appendix_klass);
332 vmassert(success || thread->last_frame().sender(&map).is_deoptimized_frame(), "caller not deoptimized on failure");
333 return success;
334 }