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 _methods_compiled = 0;
43 assert(_instance == NULL, "only one instance allowed");
44 _instance = this;
45 }
46
47 // Initialization
48 void JVMCICompiler::initialize() {
49 if (!UseCompiler || !EnableJVMCI || !UseJVMCICompiler || !should_perform_init()) {
50 return;
51 }
52
53 set_state(initialized);
54
55 // JVMCI is considered as application code so we need to
56 // stop the VM deferring compilation now.
57 CompilationPolicy::completed_vm_startup();
58 }
59
60 void JVMCICompiler::bootstrap() {
61 if (Arguments::mode() == Arguments::_int) {
62 // Nothing to do in -Xint mode
63 return;
64 }
65 #ifndef PRODUCT
66 // We turn off CompileTheWorld so that compilation requests are not
67 // ignored during bootstrap or that JVMCI can be compiled by C1/C2.
68 FlagSetting ctwOff(CompileTheWorld, false);
69 #endif
70
71 JavaThread* THREAD = JavaThread::current();
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 (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 }
115
116 #define CHECK_ABORT THREAD); \
117 if (HAS_PENDING_EXCEPTION) { \
118 char buf[256]; \
119 jio_snprintf(buf, 256, "Uncaught exception at %s:%d", __FILE__, __LINE__); \
120 JVMCICompiler::abort_on_pending_exception(PENDING_EXCEPTION, buf); \
121 return; \
122 } \
123 (void)(0
124
125 void JVMCICompiler::compile_method(const methodHandle& method, int entry_bci, JVMCIEnv* env) {
126 JVMCI_EXCEPTION_CONTEXT
127
128 bool is_osr = entry_bci != InvocationEntryBci;
129 if (_bootstrapping && is_osr) {
130 // no OSR compilations during bootstrap - the compiler is just too slow at this point,
131 // and we know that there are no endless loops
132 return;
133 }
134
135 JVMCIRuntime::initialize_well_known_classes(CHECK_ABORT);
136
137 HandleMark hm;
138 Handle receiver = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK_ABORT);
139
140 JavaValue method_result(T_OBJECT);
141 JavaCallArguments args;
142 args.push_long((jlong) (address) method());
143 JavaCalls::call_static(&method_result, SystemDictionary::HotSpotResolvedJavaMethodImpl_klass(),
144 vmSymbols::fromMetaspace_name(), vmSymbols::method_fromMetaspace_signature(), &args, THREAD);
145
146 JavaValue result(T_OBJECT);
147 if (!HAS_PENDING_EXCEPTION) {
148 JavaCallArguments args;
149 args.push_oop(receiver);
150 args.push_oop((oop)method_result.get_jobject());
151 args.push_int(entry_bci);
152 args.push_long((jlong) (address) env);
153 args.push_int(env->task()->compile_id());
154 JavaCalls::call_special(&result, receiver->klass(),
155 vmSymbols::compileMethod_name(), vmSymbols::compileMethod_signature(), &args, THREAD);
156 }
157
158 // An uncaught exception was thrown during compilation. Generally these
159 // should be handled by the Java code in some useful way but if they leak
160 // through to here report them instead of dying or silently ignoring them.
161 if (HAS_PENDING_EXCEPTION) {
162 Handle exception(THREAD, PENDING_EXCEPTION);
163 CLEAR_PENDING_EXCEPTION;
164
165 java_lang_Throwable::java_printStackTrace(exception, THREAD);
166 if (HAS_PENDING_EXCEPTION) {
167 CLEAR_PENDING_EXCEPTION;
168 }
169
170 env->set_failure("exception throw", false);
171 } else {
172 oop result_object = (oop) result.get_jobject();
173 if (result_object != NULL) {
174 oop failure_message = CompilationRequestResult::failureMessage(result_object);
175 if (failure_message != NULL) {
176 const char* failure_reason = java_lang_String::as_utf8_string(failure_message);
177 env->set_failure(failure_reason, CompilationRequestResult::retry(result_object) != 0);
178 } else {
179 if (env->task()->code() == NULL) {
180 env->set_failure("no nmethod produced", true);
181 } else {
182 env->task()->set_num_inlined_bytecodes(CompilationRequestResult::inlinedBytecodes(result_object));
183 Atomic::inc(&_methods_compiled);
184 }
185 }
186 } else {
187 assert(false, "JVMCICompiler.compileMethod should always return non-null");
188 }
189 }
190 }
191
192 /**
193 * Aborts the VM due to an unexpected exception.
194 */
195 void JVMCICompiler::abort_on_pending_exception(Handle exception, const char* message, bool dump_core) {
196 Thread* THREAD = Thread::current();
197 CLEAR_PENDING_EXCEPTION;
198
199 java_lang_Throwable::java_printStackTrace(exception, THREAD);
200
201 // Give other aborting threads to also print their stack traces.
202 // This can be very useful when debugging class initialization
203 // failures.
204 assert(THREAD->is_Java_thread(), "compiler threads should be Java threads");
205 const bool interruptible = true;
206 os::sleep(THREAD, 200, interruptible);
207
208 vm_abort(dump_core);
209 }
210
211 // Compilation entry point for methods
212 void JVMCICompiler::compile_method(ciEnv* env, ciMethod* target, int entry_bci, DirectiveSet* directive) {
213 ShouldNotReachHere();
214 }
215
216 bool JVMCICompiler::is_trivial(Method* method) {
217 if (_bootstrapping) {
218 return false;
219 }
220 return JVMCIRuntime::treat_as_trivial(method);
221 }
222
223 // Print compilation timers and statistics
224 void JVMCICompiler::print_timers() {
225 print_compilation_timers();
226 }
227
228 // Print compilation timers and statistics
229 void JVMCICompiler::print_compilation_timers() {
230 TRACE_jvmci_1("JVMCICompiler::print_timers");
231 tty->print_cr(" JVMCI code install time: %6.3f s", _codeInstallTimer.seconds());
232 }