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