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