1 /*
2 * Copyright (c) 2011, 2016, 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 "memory/oopFactory.hpp"
26 #include "memory/resourceArea.hpp"
27 #include "oops/oop.inline.hpp"
28 #include "runtime/javaCalls.hpp"
29 #include "runtime/handles.hpp"
30 #include "jvmci/jvmciJavaClasses.hpp"
31 #include "jvmci/jvmciCompiler.hpp"
32 #include "jvmci/jvmciEnv.hpp"
33 #include "jvmci/jvmciRuntime.hpp"
34 #include "runtime/compilationPolicy.hpp"
35 #include "runtime/globals_extension.hpp"
36
37 JVMCICompiler* JVMCICompiler::_instance = NULL;
38 elapsedTimer JVMCICompiler::_codeInstallTimer;
39
40 JVMCICompiler::JVMCICompiler() : AbstractCompiler(jvmci) {
41 _bootstrapping = false;
42 _bootstrap_compilation_request_handled = false;
43 _methods_compiled = 0;
44 assert(_instance == NULL, "only one instance allowed");
45 _instance = this;
46 }
47
48 // Initialization
49 void JVMCICompiler::initialize() {
50 if (!UseCompiler || !EnableJVMCI || !UseJVMCICompiler || !should_perform_init()) {
51 return;
52 }
53
54 set_state(initialized);
55
56 // JVMCI is considered as application code so we need to
57 // stop the VM deferring compilation now.
58 CompilationPolicy::completed_vm_startup();
59 }
60
61 void JVMCICompiler::bootstrap(TRAPS) {
62 if (Arguments::mode() == Arguments::_int) {
63 // Nothing to do in -Xint mode
64 return;
65 }
66 #ifndef PRODUCT
67 // We turn off CompileTheWorld so that compilation requests are not
68 // ignored during bootstrap or that JVMCI can be compiled by C1/C2.
69 FlagSetting ctwOff(CompileTheWorld, false);
70 #endif
71
72 _bootstrapping = true;
73 ResourceMark rm;
74 HandleMark hm;
75 if (PrintBootstrap) {
76 tty->print("Bootstrapping JVMCI");
77 }
78 jlong start = os::javaTimeMillis();
79
80 Array<Method*>* objectMethods = SystemDictionary::Object_klass()->methods();
81 // Initialize compile queue with a selected set of methods.
82 int len = objectMethods->length();
83 for (int i = 0; i < len; i++) {
84 methodHandle mh = objectMethods->at(i);
85 if (!mh->is_native() && !mh->is_static() && !mh->is_initializer()) {
86 ResourceMark rm;
87 int hot_count = 10; // TODO: what's the appropriate value?
88 CompileBroker::compile_method(mh, InvocationEntryBci, CompLevel_full_optimization, mh, hot_count, CompileTask::Reason_Bootstrap, THREAD);
89 }
90 }
91
92 int qsize;
93 bool first_round = true;
94 int z = 0;
95 do {
96 // Loop until there is something in the queue.
97 do {
98 os::sleep(THREAD, 100, true);
99 qsize = CompileBroker::queue_size(CompLevel_full_optimization);
100 } while (!_bootstrap_compilation_request_handled && first_round && qsize == 0);
101 first_round = false;
102 if (PrintBootstrap) {
103 while (z < (_methods_compiled / 100)) {
104 ++z;
105 tty->print_raw(".");
106 }
107 }
108 } while (qsize != 0);
109
110 if (PrintBootstrap) {
111 tty->print_cr(" in " JLONG_FORMAT " ms (compiled %d methods)", os::javaTimeMillis() - start, _methods_compiled);
112 }
113 _bootstrapping = false;
114 JVMCIRuntime::bootstrap_finished(CHECK);
115 }
116
117 #define CHECK_ABORT THREAD); \
118 if (HAS_PENDING_EXCEPTION) { \
119 char buf[256]; \
120 jio_snprintf(buf, 256, "Uncaught exception at %s:%d", __FILE__, __LINE__); \
121 JVMCICompiler::abort_on_pending_exception(PENDING_EXCEPTION, buf); \
122 return; \
123 } \
124 (void)(0
125
126 void JVMCICompiler::compile_method(const methodHandle& method, int entry_bci, JVMCIEnv* env) {
127 JVMCI_EXCEPTION_CONTEXT
128 if (SystemDictionary::java_system_loader() == NULL) {
129 // 8160121: The system class loader is cached in the VM after VM init phase 3 has completed.
130 // We cannot compile before then as the ServiceLoader cannot be used until after phase 3.
131 return;
132 }
133
134 bool is_osr = entry_bci != InvocationEntryBci;
135 if (_bootstrapping && is_osr) {
136 // no OSR compilations during bootstrap - the compiler is just too slow at this point,
137 // and we know that there are no endless loops
138 return;
139 }
140
141 JVMCIRuntime::initialize_well_known_classes(CHECK_ABORT);
142
143 HandleMark hm;
144 Handle receiver = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK_ABORT);
145
146 JavaValue method_result(T_OBJECT);
147 JavaCallArguments args;
148 args.push_long((jlong) (address) method());
149 JavaCalls::call_static(&method_result, SystemDictionary::HotSpotResolvedJavaMethodImpl_klass(),
150 vmSymbols::fromMetaspace_name(), vmSymbols::method_fromMetaspace_signature(), &args, THREAD);
151
152 JavaValue result(T_OBJECT);
153 if (!HAS_PENDING_EXCEPTION) {
154 JavaCallArguments args;
155 args.push_oop(receiver);
156 args.push_oop((oop)method_result.get_jobject());
157 args.push_int(entry_bci);
158 args.push_long((jlong) (address) env);
159 args.push_int(env->task()->compile_id());
160 JavaCalls::call_special(&result, receiver->klass(),
161 vmSymbols::compileMethod_name(), vmSymbols::compileMethod_signature(), &args, THREAD);
162 }
163
164 // An uncaught exception was thrown during compilation. Generally these
165 // should be handled by the Java code in some useful way but if they leak
166 // through to here report them instead of dying or silently ignoring them.
167 if (HAS_PENDING_EXCEPTION) {
168 Handle exception(THREAD, PENDING_EXCEPTION);
169 CLEAR_PENDING_EXCEPTION;
170
171 java_lang_Throwable::java_printStackTrace(exception, THREAD);
172 if (HAS_PENDING_EXCEPTION) {
173 CLEAR_PENDING_EXCEPTION;
174 }
175
176 env->set_failure("exception throw", false);
177 } else {
178 oop result_object = (oop) result.get_jobject();
179 if (result_object != NULL) {
180 oop failure_message = HotSpotCompilationRequestResult::failureMessage(result_object);
181 if (failure_message != NULL) {
182 const char* failure_reason = java_lang_String::as_utf8_string(failure_message);
183 env->set_failure(failure_reason, HotSpotCompilationRequestResult::retry(result_object) != 0);
184 } else {
185 if (env->task()->code() == NULL) {
186 env->set_failure("no nmethod produced", true);
187 } else {
188 env->task()->set_num_inlined_bytecodes(HotSpotCompilationRequestResult::inlinedBytecodes(result_object));
189 Atomic::inc(&_methods_compiled);
190 }
191 }
192 } else {
193 assert(false, "JVMCICompiler.compileMethod should always return non-null");
194 }
195 }
196 if (_bootstrapping) {
197 _bootstrap_compilation_request_handled = true;
198 }
199 }
200
201 CompLevel JVMCIRuntime::adjust_comp_level(methodHandle method, bool is_osr, CompLevel level, JavaThread* thread) {
202 if (!thread->adjusting_comp_level()) {
203 thread->set_adjusting_comp_level(true);
204 level = adjust_comp_level_inner(method, is_osr, level, thread);
205 thread->set_adjusting_comp_level(false);
206 }
207 return level;
208 }
209
210 /**
211 * Aborts the VM due to an unexpected exception.
212 */
213 void JVMCICompiler::abort_on_pending_exception(Handle exception, const char* message, bool dump_core) {
214 Thread* THREAD = Thread::current();
215 CLEAR_PENDING_EXCEPTION;
216
217 java_lang_Throwable::java_printStackTrace(exception, THREAD);
218
219 // Give other aborting threads to also print their stack traces.
220 // This can be very useful when debugging class initialization
221 // failures.
222 assert(THREAD->is_Java_thread(), "compiler threads should be Java threads");
223 const bool interruptible = true;
224 os::sleep(THREAD, 200, interruptible);
225
226 vm_abort(dump_core);
227 }
228
229 // Compilation entry point for methods
230 void JVMCICompiler::compile_method(ciEnv* env, ciMethod* target, int entry_bci, DirectiveSet* directive) {
231 ShouldNotReachHere();
232 }
233
234 bool JVMCICompiler::is_trivial(Method* method) {
235 if (_bootstrapping) {
236 return false;
237 }
238 return JVMCIRuntime::treat_as_trivial(method);
239 }
240
241 // Print compilation timers and statistics
242 void JVMCICompiler::print_timers() {
243 print_compilation_timers();
244 }
245
246 // Print compilation timers and statistics
247 void JVMCICompiler::print_compilation_timers() {
248 TRACE_jvmci_1("JVMCICompiler::print_timers");
249 tty->print_cr(" JVMCI code install time: %6.3f s", _codeInstallTimer.seconds());
250 }