1 /*
2 * Copyright (c) 2020, 2023, 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 "ci/ciMethod.hpp"
26 #include "compiler/compilerEvent.hpp"
27 #include "jfr/jfr.hpp"
28 #include "jfr/jfrEvents.hpp"
29 #include "jfr/metadata/jfrSerializer.hpp"
30 #include "runtime/interfaceSupport.inline.hpp"
31 #include "runtime/javaThread.hpp"
32 #include "runtime/os.hpp"
33 #include "runtime/semaphore.inline.hpp"
34 #include "utilities/growableArray.hpp"
35
36 // Synchronizes access to phases_names.
37 class PhaseTypeGuard : public StackObj {
38 private:
39 static Semaphore _mutex_semaphore;
40 bool _enabled;
41 public:
42 PhaseTypeGuard(bool enabled=true) {
43 if (enabled) {
44 _mutex_semaphore.wait();
45 _enabled = true;
46 } else {
47 _enabled = false;
48 }
49 }
50 ~PhaseTypeGuard() {
51 if (_enabled) {
52 _mutex_semaphore.signal();
53 }
54 }
55 };
56
57 Semaphore PhaseTypeGuard::_mutex_semaphore(1);
58
59 // Table for mapping compiler phases names to int identifiers.
60 static GrowableArray<const char*>* phase_names = nullptr;
61
62 class CompilerPhaseTypeConstant : public JfrSerializer {
63 public:
64 void serialize(JfrCheckpointWriter& writer) {
65 PhaseTypeGuard guard;
66 assert(phase_names != nullptr, "invariant");
67 assert(phase_names->is_nonempty(), "invariant");
68 const u4 nof_entries = phase_names->length();
69 writer.write_count(nof_entries);
70 for (u4 i = 0; i < nof_entries; i++) {
71 writer.write_key(i);
72 writer.write(phase_names->at(i));
73 }
74 }
75 };
76
77 static int lookup_phase(const char* phase_name) {
78 for (int i = 0; i < phase_names->length(); i++) {
79 const char* name = phase_names->at(i);
80 if (strcmp(name, phase_name) == 0) {
81 return i;
82 }
83 }
84 return -1;
85 }
86
87 int CompilerEvent::PhaseEvent::get_phase_id(const char* phase_name, bool may_exist, bool use_strdup, bool sync) {
88 int index;
89 bool register_jfr_serializer = false;
90 {
91 PhaseTypeGuard guard(sync);
92 if (phase_names == nullptr) {
93 phase_names = new (mtInternal) GrowableArray<const char*>(100, mtCompiler);
94 register_jfr_serializer = true;
95 } else if (may_exist) {
96 index = lookup_phase(phase_name);
97 if (index != -1) {
98 return index;
99 }
100 } else {
101 assert((index = lookup_phase(phase_name)) == -1, "phase name \"%s\" already registered: %d", phase_name, index);
102 }
103
104 index = phase_names->length();
105 phase_names->append(use_strdup ? os::strdup(phase_name) : phase_name);
106 }
107 if (register_jfr_serializer) {
108 JfrSerializer::register_serializer(TYPE_COMPILERPHASETYPE, false, new CompilerPhaseTypeConstant());
109 } else if (Jfr::is_recording()) {
110 // serialize new phase.
111 JfrCheckpointWriter writer;
112 writer.write_type(TYPE_COMPILERPHASETYPE);
113 writer.write_count(1);
114 writer.write_key(index);
115 writer.write(phase_name);
116 }
117 return index;
118 }
119
120 // As part of event commit, a Method* is tagged as a function of an epoch.
121 // Epochs evolve during safepoints. To ensure the event is tagged in the correct epoch,
122 // that is, to avoid a race, the thread will participate in the safepoint protocol
123 // by doing the commit while the thread is _thread_in_vm.
124 template <typename EventType>
125 static inline void commit(EventType& event) {
126 JavaThread* thread = JavaThread::current();
127 JavaThreadState state = thread->thread_state();
128 if (state == _thread_in_native) {
129 ThreadInVMfromNative transition(thread);
130 event.commit();
131 } else {
132 assert(state == _thread_in_vm, "coming from wrong thread state %d", state);
133 event.commit();
134 }
135 }
136
137 void CompilerEvent::CompilationEvent::post(EventCompilation& event, int compile_id, CompilerType compiler_type, Method* method, int compile_level, bool success, bool is_osr, int code_size, int inlined_bytecodes) {
138 event.set_compileId(compile_id);
139 event.set_compiler(compiler_type);
140 event.set_method(method);
141 event.set_compileLevel((short)compile_level);
142 event.set_succeded(success);
143 event.set_isOsr(is_osr);
144 event.set_codeSize(code_size);
145 event.set_inlinedBytes(inlined_bytecodes);
146 commit(event);
147 }
148
149 void CompilerEvent::CompilationFailureEvent::post(EventCompilationFailure& event, int compile_id, const char* reason) {
150 event.set_compileId(compile_id);
151 event.set_failureMessage(reason);
152 event.commit();
153 }
154
155 void CompilerEvent::PhaseEvent::post(EventCompilerPhase& event, const Ticks& start_time, int phase, int compile_id, int level) {
156 event.set_starttime(start_time);
157 event.set_phase((u1) phase);
158 event.set_compileId(compile_id);
159 event.set_phaseLevel((short)level);
160 event.commit();
161 }
162
163 void CompilerEvent::InlineEvent::post(EventCompilerInlining& event, int compile_id, Method* caller, const JfrStructCalleeMethod& callee, bool success, const char* msg, int bci) {
164 event.set_compileId(compile_id);
165 event.set_caller(caller);
166 event.set_callee(callee);
167 event.set_succeeded(success);
168 event.set_message(msg);
169 event.set_bci(bci);
170 commit(event);
171 }
172
173 void CompilerEvent::InlineEvent::post(EventCompilerInlining& event, int compile_id, Method* caller, Method* callee, bool success, const char* msg, int bci) {
174 JfrStructCalleeMethod callee_struct;
175 callee_struct.set_type(callee->klass_name()->as_utf8());
176 callee_struct.set_name(callee->name()->as_utf8());
177 callee_struct.set_descriptor(callee->signature()->as_utf8());
178 post(event, compile_id, caller, callee_struct, success, msg, bci);
179 }
180
181 void CompilerEvent::InlineEvent::post(EventCompilerInlining& event, int compile_id, Method* caller, ciMethod* callee, bool success, const char* msg, int bci) {
182 JfrStructCalleeMethod callee_struct;
183 callee_struct.set_type(callee->holder()->name()->as_utf8());
184 callee_struct.set_name(callee->name()->as_utf8());
185 callee_struct.set_descriptor(callee->signature()->as_symbol()->as_utf8());
186 post(event, compile_id, caller, callee_struct, success, msg, bci);
187 }