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() &&
91 !mh->is_static() &&
92 !mh->is_object_constructor() &&
93 !mh->is_class_initializer()) {
94 ResourceMark rm;
95 int hot_count = 10; // TODO: what's the appropriate value?
96 CompileBroker::compile_method(mh, InvocationEntryBci, CompLevel_full_optimization, mh, hot_count, CompileTask::Reason_Bootstrap, CHECK);
97 }
98 }
99
100 int qsize;
101 bool first_round = true;
102 int z = 0;
103 do {
104 // Loop until there is something in the queue.
105 do {
106 THREAD->sleep(100);
107 qsize = CompileBroker::queue_size(CompLevel_full_optimization);
108 } while (!_bootstrap_compilation_request_handled && first_round && qsize == 0);
109 first_round = false;
110 if (PrintBootstrap) {
111 while (z < (_methods_compiled / 100)) {
112 ++z;
113 tty->print_raw(".");
114 }
115 }
116 } while (qsize != 0);
117
118 if (PrintBootstrap) {
119 tty->print_cr(" in " JLONG_FORMAT " ms (compiled %d methods)",
120 (jlong)nanos_to_millis(os::javaTimeNanos() - start), _methods_compiled);
121 }
122 _bootstrapping = false;
123 JVMCI::java_runtime()->bootstrap_finished(CHECK);
124 }
125
126 bool JVMCICompiler::force_comp_at_level_simple(const methodHandle& method) {
127 if (_disabled) {
128 return true;
129 }
130 if (_bootstrapping) {
131 // When bootstrapping, the JVMCI compiler can compile its own methods.
132 return false;
133 }
134 if (UseJVMCINativeLibrary) {
135 // This mechanism exists to force compilation of a JVMCI compiler by C1
136 // to reduce the compilation time spent on the JVMCI compiler itself. In
137 // +UseJVMCINativeLibrary mode, the JVMCI compiler is AOT compiled.
138 return false;
139 } else {
140 JVMCIRuntime* runtime = JVMCI::java_runtime();
141 if (runtime != nullptr) {
142 JVMCIObject receiver = runtime->probe_HotSpotJVMCIRuntime();
143 if (receiver.is_null()) {
144 return false;
145 }
146 JVMCIEnv* ignored_env = nullptr;
147 objArrayHandle excludeModules(JavaThread::current(), HotSpotJVMCI::HotSpotJVMCIRuntime::excludeFromJVMCICompilation(ignored_env, HotSpotJVMCI::resolve(receiver)));
148 if (excludeModules.not_null()) {
149 ModuleEntry* moduleEntry = method->method_holder()->module();
150 for (int i = 0; i < excludeModules->length(); i++) {
151 if (excludeModules->obj_at(i) == moduleEntry->module()) {
152 return true;
153 }
154 }
155 }
156 }
157 return false;
158 }
159 }
160
161 // Compilation entry point for methods
162 void JVMCICompiler::compile_method(ciEnv* env, ciMethod* target, int entry_bci, bool install_code, DirectiveSet* directive) {
163 ShouldNotReachHere();
164 }
165
166 void JVMCICompiler::stopping_compiler_thread(CompilerThread* current) {
167 if (UseJVMCINativeLibrary) {
168 JVMCIRuntime* runtime = JVMCI::compiler_runtime(current, false);
169 if (runtime != nullptr) {
170 MutexUnlocker unlock(CompileThread_lock);
171 runtime->detach_thread(current, "stopping idle compiler thread");
172 }
173 }
174 }
175
176 void JVMCICompiler::on_empty_queue(CompileQueue* queue, CompilerThread* thread) {
177 if (UseJVMCINativeLibrary) {
178 int delay = JVMCICompilerIdleDelay;
179 JVMCIRuntime* runtime = JVMCI::compiler_runtime(thread, false);
180 // Don't detach JVMCI compiler threads from their JVMCI
181 // runtime during the VM startup grace period
182 if (runtime != nullptr && delay > 0 && tty->time_stamp().milliseconds() > DEFAULT_COMPILER_IDLE_DELAY) {
183 bool timeout = MethodCompileQueue_lock->wait(delay);
184 // Unlock as detaching or repacking can result in a JNI call to shutdown a JavaVM
185 // and locks cannot be held when making a VM to native transition.
186 MutexUnlocker unlock(MethodCompileQueue_lock);
187 if (timeout) {
188 runtime->detach_thread(thread, "releasing idle compiler thread");
189 } else {
190 runtime->repack(thread);
191 }
192 }
193 }
194 }
195
196 // Print compilation timers
197 void JVMCICompiler::print_timers() {
198 tty->print_cr(" JVMCI CompileBroker Time:");
199 tty->print_cr(" Compile: %7.3f s", stats()->total_time());
200 _jit_code_installs.print_on(tty, " Install Code: ");
201 tty->cr();
202 tty->print_cr(" JVMCI Hosted Time:");
203 _hosted_code_installs.print_on(tty, " Install Code: ");
204 }
205
206 bool JVMCICompiler::is_intrinsic_supported(const methodHandle& method) {
207 vmIntrinsics::ID id = method->intrinsic_id();
208 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
209 JavaThread* thread = JavaThread::current();
210 JVMCIEnv jvmciEnv(thread, __FILE__, __LINE__);
211 JVMCIRuntime* runtime = JVMCI::compiler_runtime(thread, false);
212 return runtime->is_intrinsic_supported(&jvmciEnv, (jint) id);
213 }
214
215 void JVMCICompiler::CodeInstallStats::print_on(outputStream* st, const char* prefix) const {
216 double time = _timer.seconds();
217 st->print_cr("%s%7.3f s (installs: %d, CodeBlob total size: %d, CodeBlob code size: %d)",
218 prefix, time, _count, _codeBlobs_size, _codeBlobs_code_size);
219 }
220
221 void JVMCICompiler::CodeInstallStats::on_install(CodeBlob* cb) {
222 Atomic::inc(&_count);
223 Atomic::add(&_codeBlobs_size, cb->size());
224 Atomic::add(&_codeBlobs_code_size, cb->code_size());
225 }
226
227 void JVMCICompiler::inc_methods_compiled() {
228 Atomic::inc(&_methods_compiled);
229 Atomic::inc(&_global_compilation_ticks);
230 }
231
232 void JVMCICompiler::on_upcall(const char* error, JVMCICompileState* compile_state) {
233 if (error != nullptr) {
234
235 Atomic::inc(&_err_upcalls);
236 int ok = _ok_upcalls;
237 int err = _err_upcalls;
238 // If there have been at least 10 upcalls with an error
239 // and the number of error upcalls is 10% or more of the
240 // number of non-error upcalls, disable JVMCI compilation.
241 if (err > 10 && err * 10 > ok && !_disabled) {
242 _disabled = true;
243 int total = err + ok;
244 // Using stringStream instead of err_msg to avoid truncation
245 stringStream st;
246 st.print("JVMCI compiler disabled "
247 "after %d of %d upcalls had errors (Last error: \"%s\"). "
248 "Use -Xlog:jit+compilation for more detail.", err, total, error);
249 const char* disable_msg = st.freeze();
250 log_warning(jit,compilation)("%s", disable_msg);
251 if (compile_state != nullptr) {
252 const char* disable_error = os::strdup(disable_msg);
253 if (disable_error != nullptr) {
254 compile_state->set_failure(true, disable_error, true);
255 JVMCI_event_1("%s", disable_error);
256 return;
257 } else {
258 // Leave failure reason as set by caller when strdup fails
259 }
260 }
261 }
262 JVMCI_event_1("JVMCI upcall had an error: %s", error);
263 } else {
264 Atomic::inc(&_ok_upcalls);
265 }
266 }
267
268 void JVMCICompiler::inc_global_compilation_ticks() {
269 Atomic::inc(&_global_compilation_ticks);
270 }