1 /*
2 * Copyright (c) 2011, 2017, 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 #include "memory/oopFactory.hpp"
27 #include "memory/resourceArea.hpp"
28 #include "oops/oop.inline.hpp"
29 #include "runtime/javaCalls.hpp"
30 #include "runtime/handles.hpp"
31 #include "jvmci/jvmciJavaClasses.hpp"
32 #include "jvmci/jvmciCompiler.hpp"
33 #include "jvmci/jvmciEnv.hpp"
34 #include "jvmci/jvmciRuntime.hpp"
35 #include "runtime/compilationPolicy.hpp"
36 #include "runtime/globals_extension.hpp"
37
38 JVMCICompiler* JVMCICompiler::_instance = NULL;
39 elapsedTimer JVMCICompiler::_codeInstallTimer;
40
41 JVMCICompiler::JVMCICompiler() : AbstractCompiler(compiler_jvmci) {
42 _bootstrapping = false;
43 _bootstrap_compilation_request_handled = false;
44 _methods_compiled = 0;
45 assert(_instance == NULL, "only one instance allowed");
46 _instance = this;
47 }
48
49 // Initialization
50 void JVMCICompiler::initialize() {
51 if (!UseCompiler || !EnableJVMCI || !UseJVMCICompiler || !should_perform_init()) {
52 return;
53 }
54
55 set_state(initialized);
56
57 // JVMCI is considered as application code so we need to
58 // stop the VM deferring compilation now.
59 CompilationPolicy::completed_vm_startup();
60 }
61
62 void JVMCICompiler::bootstrap(TRAPS) {
63 if (Arguments::mode() == Arguments::_int) {
64 // Nothing to do in -Xint mode
65 return;
66 }
67 #ifndef PRODUCT
68 // We turn off CompileTheWorld so that compilation requests are not
69 // ignored during bootstrap or that JVMCI can be compiled by C1/C2.
70 FlagSetting ctwOff(CompileTheWorld, false);
71 #endif
72
73 _bootstrapping = true;
74 ResourceMark rm;
75 HandleMark hm;
76 if (PrintBootstrap) {
77 tty->print("Bootstrapping JVMCI");
78 }
79 jlong start = os::javaTimeMillis();
80
81 Array<Method*>* objectMethods = SystemDictionary::Object_klass()->methods();
82 // Initialize compile queue with a selected set of methods.
83 int len = objectMethods->length();
84 for (int i = 0; i < len; i++) {
85 methodHandle mh = objectMethods->at(i);
86 if (!mh->is_native() && !mh->is_static() && !mh->is_initializer()) {
87 ResourceMark rm;
88 int hot_count = 10; // TODO: what's the appropriate value?
89 CompileBroker::compile_method(mh, InvocationEntryBci, CompLevel_full_optimization, mh, hot_count, CompileTask::Reason_Bootstrap, THREAD);
90 }
91 }
92
93 int qsize;
94 bool first_round = true;
95 int z = 0;
96 do {
97 // Loop until there is something in the queue.
98 do {
99 os::sleep(THREAD, 100, true);
100 qsize = CompileBroker::queue_size(CompLevel_full_optimization);
101 } while (!_bootstrap_compilation_request_handled && first_round && qsize == 0);
102 first_round = false;
103 if (PrintBootstrap) {
104 while (z < (_methods_compiled / 100)) {
105 ++z;
106 tty->print_raw(".");
107 }
108 }
109 } while (qsize != 0);
110
111 if (PrintBootstrap) {
112 tty->print_cr(" in " JLONG_FORMAT " ms (compiled %d methods)", os::javaTimeMillis() - start, _methods_compiled);
113 }
114 _bootstrapping = false;
115 JVMCIRuntime::bootstrap_finished(CHECK);
116 }
117
118 #define CHECK_EXIT THREAD); \
119 if (HAS_PENDING_EXCEPTION) { \
120 char buf[256]; \
121 jio_snprintf(buf, 256, "Uncaught exception at %s:%d", __FILE__, __LINE__); \
122 JVMCICompiler::exit_on_pending_exception(PENDING_EXCEPTION, buf); \
123 return; \
124 } \
125 (void)(0
126
127 void JVMCICompiler::compile_method(const methodHandle& method, int entry_bci, JVMCIEnv* env) {
128 JVMCI_EXCEPTION_CONTEXT
129
130 bool is_osr = entry_bci != InvocationEntryBci;
131 if (_bootstrapping && is_osr) {
132 // no OSR compilations during bootstrap - the compiler is just too slow at this point,
133 // and we know that there are no endless loops
134 return;
135 }
136
137 JVMCIRuntime::initialize_well_known_classes(CHECK_EXIT);
138
139 HandleMark hm;
140 Handle receiver = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK_EXIT);
141
142 JavaValue method_result(T_OBJECT);
143 JavaCallArguments args;
144 args.push_long((jlong) (address) method());
145 JavaCalls::call_static(&method_result, SystemDictionary::HotSpotResolvedJavaMethodImpl_klass(),
146 vmSymbols::fromMetaspace_name(), vmSymbols::method_fromMetaspace_signature(), &args, THREAD);
147
148 JavaValue result(T_OBJECT);
149 if (!HAS_PENDING_EXCEPTION) {
150 JavaCallArguments args;
151 args.push_oop(receiver);
152 args.push_oop(Handle(THREAD, (oop)method_result.get_jobject()));
153 args.push_int(entry_bci);
154 args.push_long((jlong) (address) env);
155 args.push_int(env->task()->compile_id());
156 JavaCalls::call_special(&result, receiver->klass(),
157 vmSymbols::compileMethod_name(), vmSymbols::compileMethod_signature(), &args, THREAD);
158 }
159
160 // An uncaught exception was thrown during compilation. Generally these
161 // should be handled by the Java code in some useful way but if they leak
162 // through to here report them instead of dying or silently ignoring them.
163 if (HAS_PENDING_EXCEPTION) {
164 Handle exception(THREAD, PENDING_EXCEPTION);
165 CLEAR_PENDING_EXCEPTION;
166
167 java_lang_Throwable::java_printStackTrace(exception, THREAD);
168 if (HAS_PENDING_EXCEPTION) {
169 CLEAR_PENDING_EXCEPTION;
170 }
171
172 env->set_failure("exception throw", false);
173 } else {
174 oop result_object = (oop) result.get_jobject();
175 if (result_object != NULL) {
176 oop failure_message = HotSpotCompilationRequestResult::failureMessage(result_object);
177 if (failure_message != NULL) {
178 const char* failure_reason = java_lang_String::as_utf8_string(failure_message);
179 env->set_failure(failure_reason, HotSpotCompilationRequestResult::retry(result_object) != 0);
180 } else {
181 if (env->task()->code() == NULL) {
182 env->set_failure("no nmethod produced", true);
183 } else {
184 env->task()->set_num_inlined_bytecodes(HotSpotCompilationRequestResult::inlinedBytecodes(result_object));
185 Atomic::inc(&_methods_compiled);
186 }
187 }
188 } else {
189 assert(false, "JVMCICompiler.compileMethod should always return non-null");
190 }
191 }
192 if (_bootstrapping) {
193 _bootstrap_compilation_request_handled = true;
194 }
195 }
196
197 CompLevel JVMCIRuntime::adjust_comp_level(const methodHandle& method, bool is_osr, CompLevel level, JavaThread* thread) {
198 if (!thread->adjusting_comp_level()) {
199 thread->set_adjusting_comp_level(true);
200 level = adjust_comp_level_inner(method, is_osr, level, thread);
201 thread->set_adjusting_comp_level(false);
202 }
203 return level;
204 }
205
206 void JVMCICompiler::exit_on_pending_exception(oop exception, const char* message) {
207 JavaThread* THREAD = JavaThread::current();
208 CLEAR_PENDING_EXCEPTION;
209
210 static volatile int report_error = 0;
211 if (!report_error && Atomic::cmpxchg(1, &report_error, 0) == 0) {
212 // Only report an error once
213 tty->print_raw_cr(message);
214 Handle ex(THREAD, exception);
215 java_lang_Throwable::java_printStackTrace(ex, THREAD);
216 } else {
217 // Allow error reporting thread to print the stack trace.
218 os::sleep(THREAD, 200, false);
219 }
220
221 before_exit(THREAD);
222 vm_exit(-1);
223 }
224
225 // Compilation entry point for methods
226 void JVMCICompiler::compile_method(ciEnv* env, ciMethod* target, int entry_bci, DirectiveSet* directive) {
227 ShouldNotReachHere();
228 }
229
230 bool JVMCICompiler::is_trivial(Method* method) {
231 if (_bootstrapping) {
232 return false;
233 }
234 return JVMCIRuntime::treat_as_trivial(method);
235 }
236
237 // Print compilation timers and statistics
238 void JVMCICompiler::print_timers() {
239 print_compilation_timers();
240 }
241
242 // Print compilation timers and statistics
243 void JVMCICompiler::print_compilation_timers() {
244 TRACE_jvmci_1("JVMCICompiler::print_timers");
245 tty->print_cr(" JVMCI code install time: %6.3f s", _codeInstallTimer.seconds());
246 }