1 /*
2 * Copyright (c) 2011, 2019, 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
59 void JVMCICompiler::bootstrap(TRAPS) {
60 if (Arguments::mode() == Arguments::_int) {
61 // Nothing to do in -Xint mode
62 return;
63 }
64 _bootstrapping = true;
65 ResourceMark rm;
66 HandleMark hm;
67 if (PrintBootstrap) {
68 tty->print("Bootstrapping JVMCI");
69 }
70 jlong start = os::javaTimeMillis();
71
72 Array<Method*>* objectMethods = SystemDictionary::Object_klass()->methods();
73 // Initialize compile queue with a selected set of methods.
74 int len = objectMethods->length();
75 for (int i = 0; i < len; i++) {
76 methodHandle mh = objectMethods->at(i);
77 if (!mh->is_native() && !mh->is_static() && !mh->is_initializer()) {
78 ResourceMark rm;
79 int hot_count = 10; // TODO: what's the appropriate value?
80 CompileBroker::compile_method(mh, InvocationEntryBci, CompLevel_full_optimization, mh, hot_count, CompileTask::Reason_Bootstrap, THREAD);
81 }
82 }
83
84 int qsize;
85 bool first_round = true;
86 int z = 0;
87 do {
88 // Loop until there is something in the queue.
89 do {
90 os::sleep(THREAD, 100, true);
91 qsize = CompileBroker::queue_size(CompLevel_full_optimization);
92 } while (!_bootstrap_compilation_request_handled && first_round && qsize == 0);
93 first_round = false;
94 if (PrintBootstrap) {
95 while (z < (_methods_compiled / 100)) {
96 ++z;
97 tty->print_raw(".");
98 }
99 }
100 } while (qsize != 0);
101
102 if (PrintBootstrap) {
103 tty->print_cr(" in " JLONG_FORMAT " ms (compiled %d methods)", os::javaTimeMillis() - start, _methods_compiled);
104 }
105 _bootstrapping = false;
106 JVMCIRuntime::bootstrap_finished(CHECK);
107 }
108
109 #define CHECK_EXIT THREAD); \
110 if (HAS_PENDING_EXCEPTION) { \
111 char buf[256]; \
112 jio_snprintf(buf, 256, "Uncaught exception at %s:%d", __FILE__, __LINE__); \
113 JVMCICompiler::exit_on_pending_exception(PENDING_EXCEPTION, buf); \
114 return; \
115 } \
116 (void)(0
117
118 void JVMCICompiler::compile_method(const methodHandle& method, int entry_bci, JVMCIEnv* env) {
119 JVMCI_EXCEPTION_CONTEXT
120
121 bool is_osr = entry_bci != InvocationEntryBci;
122 if (_bootstrapping && is_osr) {
123 // no OSR compilations during bootstrap - the compiler is just too slow at this point,
124 // and we know that there are no endless loops
125 env->set_failure(true, "No OSR during boostrap");
126 return;
127 }
128
129 JVMCIRuntime::initialize_well_known_classes(CHECK_EXIT);
130
131 HandleMark hm;
132 Handle receiver = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK_EXIT);
133
134 JavaValue method_result(T_OBJECT);
135 JavaCallArguments args;
136 args.push_long((jlong) (address) method());
137 JavaCalls::call_static(&method_result, SystemDictionary::HotSpotResolvedJavaMethodImpl_klass(),
138 vmSymbols::fromMetaspace_name(), vmSymbols::method_fromMetaspace_signature(), &args, THREAD);
139
140 JavaValue result(T_OBJECT);
141 if (!HAS_PENDING_EXCEPTION) {
142 JavaCallArguments args;
143 args.push_oop(receiver);
144 args.push_oop(Handle(THREAD, (oop)method_result.get_jobject()));
145 args.push_int(entry_bci);
146 args.push_long((jlong) (address) env);
147 args.push_int(env->task()->compile_id());
148 JavaCalls::call_special(&result, receiver->klass(),
149 vmSymbols::compileMethod_name(), vmSymbols::compileMethod_signature(), &args, THREAD);
150 }
151
152 // An uncaught exception was thrown during compilation. Generally these
153 // should be handled by the Java code in some useful way but if they leak
154 // through to here report them instead of dying or silently ignoring them.
155 if (HAS_PENDING_EXCEPTION) {
156 Handle exception(THREAD, PENDING_EXCEPTION);
157 CLEAR_PENDING_EXCEPTION;
158
159 java_lang_Throwable::java_printStackTrace(exception, THREAD);
160 if (HAS_PENDING_EXCEPTION) {
161 CLEAR_PENDING_EXCEPTION;
162 }
163
164 env->set_failure(false, "unexpected exception thrown");
165 } else {
166 oop result_object = (oop) result.get_jobject();
167 if (result_object != NULL) {
168 oop failure_message = HotSpotCompilationRequestResult::failureMessage(result_object);
169 if (failure_message != NULL) {
170 // Copy failure reason into resource memory first ...
171 const char* failure_reason = java_lang_String::as_utf8_string(failure_message);
172 // ... and then into the C heap.
173 failure_reason = os::strdup(failure_reason, mtCompiler);
174 bool retryable = HotSpotCompilationRequestResult::retry(result_object) != 0;
175 env->set_failure(retryable, failure_reason, true);
176 } else {
177 if (env->task()->code() == NULL) {
178 env->set_failure(true, "no nmethod produced");
179 } else {
180 env->task()->set_num_inlined_bytecodes(HotSpotCompilationRequestResult::inlinedBytecodes(result_object));
181 Atomic::inc(&_methods_compiled);
182 }
183 }
184 } else {
185 assert(false, "JVMCICompiler.compileMethod should always return non-null");
186 }
187 }
188 if (_bootstrapping) {
189 _bootstrap_compilation_request_handled = true;
190 }
191 }
192
193 CompLevel JVMCIRuntime::adjust_comp_level(const methodHandle& method, bool is_osr, CompLevel level, JavaThread* thread) {
194 if (!thread->adjusting_comp_level()) {
195 thread->set_adjusting_comp_level(true);
196 level = adjust_comp_level_inner(method, is_osr, level, thread);
197 thread->set_adjusting_comp_level(false);
198 }
199 return level;
200 }
201
202 void JVMCICompiler::exit_on_pending_exception(oop exception, const char* message) {
203 JavaThread* THREAD = JavaThread::current();
204 CLEAR_PENDING_EXCEPTION;
205
206 static volatile int report_error = 0;
207 if (!report_error && Atomic::cmpxchg(1, &report_error, 0) == 0) {
208 // Only report an error once
209 tty->print_raw_cr(message);
210 Handle ex(THREAD, exception);
211 java_lang_Throwable::java_printStackTrace(ex, THREAD);
212 } else {
213 // Allow error reporting thread to print the stack trace. Windows
214 // doesn't allow uninterruptible wait for JavaThreads
215 const bool interruptible = true;
216 os::sleep(THREAD, 200, interruptible);
217 }
218
219 before_exit(THREAD);
220 vm_exit(-1);
221 }
222
223 // Compilation entry point for methods
224 void JVMCICompiler::compile_method(ciEnv* env, ciMethod* target, int entry_bci, DirectiveSet* directive) {
225 ShouldNotReachHere();
226 }
227
228 // Print compilation timers and statistics
229 void JVMCICompiler::print_timers() {
230 print_compilation_timers();
231 }
232
233 // Print compilation timers and statistics
234 void JVMCICompiler::print_compilation_timers() {
235 TRACE_jvmci_1("JVMCICompiler::print_timers");
236 tty->print_cr(" JVMCI code install time: %6.3f s", _codeInstallTimer.seconds());
237 }