1 /*
2 * Copyright (c) 2011, 2024, 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 "classfile/vmClasses.hpp"
26 #include "compiler/compileBroker.hpp"
27 #include "compiler/compilerDefinitions.inline.hpp"
28 #include "classfile/moduleEntry.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "jvmci/jvmciEnv.hpp"
31 #include "jvmci/jvmciRuntime.hpp"
32 #include "oops/objArrayOop.inline.hpp"
33 #include "runtime/arguments.hpp"
34 #include "runtime/handles.inline.hpp"
35
36 JVMCICompiler* JVMCICompiler::_instance = nullptr;
37
38 JVMCICompiler::JVMCICompiler() : AbstractCompiler(compiler_jvmci) {
39 _bootstrapping = false;
40 _bootstrap_compilation_request_handled = false;
41 _methods_compiled = 0;
42 _ok_upcalls = 0;
43 _err_upcalls = 0;
44 _disabled = false;
45 _global_compilation_ticks = 0;
46 assert(_instance == nullptr, "only one instance allowed");
47 _instance = this;
48 }
49
50 JVMCICompiler* JVMCICompiler::instance(bool require_non_null, TRAPS) {
51 if (!EnableJVMCI) {
52 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVMCI is not enabled")
53 }
54 if (_instance == nullptr && require_non_null) {
55 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "The JVMCI compiler instance has not been created");
56 }
57 return _instance;
58 }
59
60 void compiler_stubs_init(bool in_compiler_thread);
61
62 // Initialization
63 void JVMCICompiler::initialize() {
64 assert(!CompilerConfig::is_c1_or_interpreter_only_no_jvmci(), "JVMCI is launched, it's not c1/interpreter only mode");
65 if (!UseCompiler || !EnableJVMCI || !UseJVMCICompiler || !should_perform_init()) {
66 return;
67 }
68 compiler_stubs_init(true /* in_compiler_thread */); // generate compiler's intrinsics stubs
69 set_state(initialized);
70 }
71
72 void JVMCICompiler::bootstrap(TRAPS) {
73 if (Arguments::mode() == Arguments::_int) {
74 // Nothing to do in -Xint mode
75 return;
76 }
77 _bootstrapping = true;
78 ResourceMark rm(THREAD);
79 HandleMark hm(THREAD);
80 if (PrintBootstrap) {
81 tty->print("Bootstrapping JVMCI");
82 }
83 jlong start = os::javaTimeNanos();
84
85 Array<Method*>* objectMethods = vmClasses::Object_klass()->methods();
86 // Initialize compile queue with a selected set of methods.
87 int len = objectMethods->length();
88 for (int i = 0; i < len; i++) {
89 methodHandle mh(THREAD, objectMethods->at(i));
90 if (!mh->is_native() && !mh->is_static() && !mh->is_initializer()) {
91 ResourceMark rm;
92 int hot_count = 10; // TODO: what's the appropriate value?
93 CompileBroker::compile_method(mh, InvocationEntryBci, CompLevel_full_optimization, mh, hot_count, false, CompileTask::Reason_Bootstrap, CHECK);
94 }
95 }
96
97 int qsize;
98 bool first_round = true;
99 int z = 0;
100 do {
101 // Loop until there is something in the queue.
102 do {
103 THREAD->sleep(100);
104 qsize = CompileBroker::queue_size(CompLevel_full_optimization);
105 } while (!_bootstrap_compilation_request_handled && first_round && qsize == 0);
106 first_round = false;
107 if (PrintBootstrap) {
108 while (z < (_methods_compiled / 100)) {
109 ++z;
110 tty->print_raw(".");
111 }
112 }
113 } while (qsize != 0);
114
115 if (PrintBootstrap) {
116 tty->print_cr(" in " JLONG_FORMAT " ms (compiled %d methods)",
117 (jlong)nanos_to_millis(os::javaTimeNanos() - start), _methods_compiled);
118 }
119 _bootstrapping = false;
120 JVMCI::java_runtime()->bootstrap_finished(CHECK);
121 }
122
123 bool JVMCICompiler::force_comp_at_level_simple(const methodHandle& method) {
124 if (_disabled) {
125 return true;
126 }
127 if (_bootstrapping) {
128 // When bootstrapping, the JVMCI compiler can compile its own methods.
129 return false;
130 }
131 if (UseJVMCINativeLibrary) {
132 // This mechanism exists to force compilation of a JVMCI compiler by C1
133 // to reduce the compilation time spent on the JVMCI compiler itself. In
134 // +UseJVMCINativeLibrary mode, the JVMCI compiler is AOT compiled.
135 return false;
136 } else {
137 JVMCIRuntime* runtime = JVMCI::java_runtime();
138 if (runtime != nullptr) {
139 JVMCIObject receiver = runtime->probe_HotSpotJVMCIRuntime();
140 if (receiver.is_null()) {
141 return false;
142 }
143 JVMCIEnv* ignored_env = nullptr;
144 objArrayHandle excludeModules(JavaThread::current(), HotSpotJVMCI::HotSpotJVMCIRuntime::excludeFromJVMCICompilation(ignored_env, HotSpotJVMCI::resolve(receiver)));
145 if (excludeModules.not_null()) {
146 ModuleEntry* moduleEntry = method->method_holder()->module();
147 for (int i = 0; i < excludeModules->length(); i++) {
148 if (excludeModules->obj_at(i) == moduleEntry->module()) {
149 return true;
150 }
151 }
152 }
153 }
154 return false;
155 }
156 }
157
158 // Compilation entry point for methods
159 void JVMCICompiler::compile_method(ciEnv* env, ciMethod* target, int entry_bci, bool install_code, DirectiveSet* directive) {
160 ShouldNotReachHere();
161 }
162
163 void JVMCICompiler::stopping_compiler_thread(CompilerThread* current) {
164 if (UseJVMCINativeLibrary) {
165 JVMCIRuntime* runtime = JVMCI::compiler_runtime(current, false);
166 if (runtime != nullptr) {
167 MutexUnlocker unlock(CompileThread_lock);
168 runtime->detach_thread(current, "stopping idle compiler thread");
169 }
170 }
171 }
172
173 void JVMCICompiler::on_empty_queue(CompileQueue* queue, CompilerThread* thread) {
174 if (UseJVMCINativeLibrary) {
175 int delay = JVMCICompilerIdleDelay;
176 JVMCIRuntime* runtime = JVMCI::compiler_runtime(thread, false);
177 // Don't detach JVMCI compiler threads from their JVMCI
178 // runtime during the VM startup grace period
179 if (runtime != nullptr && delay > 0 && tty->time_stamp().milliseconds() > DEFAULT_COMPILER_IDLE_DELAY) {
180 bool timeout = MethodCompileQueue_lock->wait(delay);
181 // Unlock as detaching or repacking can result in a JNI call to shutdown a JavaVM
182 // and locks cannot be held when making a VM to native transition.
183 MutexUnlocker unlock(MethodCompileQueue_lock);
184 if (timeout) {
185 runtime->detach_thread(thread, "releasing idle compiler thread");
186 } else {
187 runtime->repack(thread);
188 }
189 }
190 }
191 }
192
193 // Print compilation timers
194 void JVMCICompiler::print_timers() {
195 tty->print_cr(" JVMCI CompileBroker Time:");
196 tty->print_cr(" Compile: %7.3f s", stats()->total_time());
197 _jit_code_installs.print_on(tty, " Install Code: ");
198 tty->cr();
199 tty->print_cr(" JVMCI Hosted Time:");
200 _hosted_code_installs.print_on(tty, " Install Code: ");
201 }
202
203 bool JVMCICompiler::is_intrinsic_supported(const methodHandle& method) {
204 vmIntrinsics::ID id = method->intrinsic_id();
205 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
206 JavaThread* thread = JavaThread::current();
207 JVMCIEnv jvmciEnv(thread, __FILE__, __LINE__);
208 JVMCIRuntime* runtime = JVMCI::compiler_runtime(thread, false);
209 return runtime->is_intrinsic_supported(&jvmciEnv, (jint) id);
210 }
211
212 void JVMCICompiler::CodeInstallStats::print_on(outputStream* st, const char* prefix) const {
213 double time = _timer.seconds();
214 st->print_cr("%s%7.3f s (installs: %d, CodeBlob total size: %d, CodeBlob code size: %d)",
215 prefix, time, _count, _codeBlobs_size, _codeBlobs_code_size);
216 }
217
218 void JVMCICompiler::CodeInstallStats::on_install(CodeBlob* cb) {
219 Atomic::inc(&_count);
220 Atomic::add(&_codeBlobs_size, cb->size());
221 Atomic::add(&_codeBlobs_code_size, cb->code_size());
222 }
223
224 void JVMCICompiler::inc_methods_compiled() {
225 Atomic::inc(&_methods_compiled);
226 Atomic::inc(&_global_compilation_ticks);
227 }
228
229 void JVMCICompiler::on_upcall(const char* error, JVMCICompileState* compile_state) {
230 if (error != nullptr) {
231
232 Atomic::inc(&_err_upcalls);
233 int ok = _ok_upcalls;
234 int err = _err_upcalls;
235 // If there have been at least 10 upcalls with an error
236 // and the number of error upcalls is 10% or more of the
237 // number of non-error upcalls, disable JVMCI compilation.
238 if (err > 10 && err * 10 > ok && !_disabled) {
239 _disabled = true;
240 int total = err + ok;
241 // Using stringStream instead of err_msg to avoid truncation
242 stringStream st;
243 st.print("JVMCI compiler disabled "
244 "after %d of %d upcalls had errors (Last error: \"%s\"). "
245 "Use -Xlog:jit+compilation for more detail.", err, total, error);
246 const char* disable_msg = st.freeze();
247 log_warning(jit,compilation)("%s", disable_msg);
248 if (compile_state != nullptr) {
249 const char* disable_error = os::strdup(disable_msg);
250 if (disable_error != nullptr) {
251 compile_state->set_failure(true, disable_error, true);
252 JVMCI_event_1("%s", disable_error);
253 return;
254 } else {
255 // Leave failure reason as set by caller when strdup fails
256 }
257 }
258 }
259 JVMCI_event_1("JVMCI upcall had an error: %s", error);
260 } else {
261 Atomic::inc(&_ok_upcalls);
262 }
263 }
264
265 void JVMCICompiler::inc_global_compilation_ticks() {
266 Atomic::inc(&_global_compilation_ticks);
267 }