1 /*
2 * Copyright (c) 1998, 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
25 #ifndef SHARE_COMPILER_COMPILETASK_HPP
26 #define SHARE_COMPILER_COMPILETASK_HPP
27
28 #include "ci/ciMethod.hpp"
29 #include "code/nmethod.hpp"
30 #include "compiler/compileLog.hpp"
31 #include "memory/allocation.hpp"
32 #include "utilities/xmlstream.hpp"
33
34 class CompileQueue;
35 class CompileTrainingData;
36 class DirectiveSet;
37 class SCCEntry;
38
39 JVMCI_ONLY(class JVMCICompileState;)
40
41 enum class InliningResult { SUCCESS, FAILURE };
42
43 inline InliningResult inlining_result_of(bool success) {
44 return success ? InliningResult::SUCCESS : InliningResult::FAILURE;
45 }
46
47 // CompileTask
48 //
49 // An entry in the compile queue. It represents a pending or current
50 // compilation.
51
52 class CompileTask : public CHeapObj<mtCompiler> {
53 friend class VMStructs;
54 friend class JVMCIVMStructs;
55
56 public:
57 // Different reasons for a compilation
58 // The order is important - mapped to reason_names[]
59 enum CompileReason {
60 Reason_None,
61 Reason_InvocationCount, // Simple/StackWalk-policy
62 Reason_BackedgeCount, // Simple/StackWalk-policy
63 Reason_Tiered, // Tiered-policy
64 Reason_Replay, // ciReplay
65 Reason_Whitebox, // Whitebox API
66 Reason_MustBeCompiled, // Used for -Xcomp or AlwaysCompileLoopMethods (see CompilationPolicy::must_be_compiled())
67 Reason_Bootstrap, // JVMCI bootstrap
68 Reason_Preload, // pre-load SC code
69 Reason_Precompile,
70 Reason_PrecompileForPreload,
71 Reason_Count
72 };
73
74 static const char* reason_name(CompileTask::CompileReason compile_reason) {
75 static const char* reason_names[] = {
76 "no_reason",
77 "count",
78 "backedge_count",
79 "tiered",
80 "replay",
81 "whitebox",
82 "must_be_compiled",
83 "bootstrap",
84 "preload",
85 "precompile",
86 "precompile_for_preload",
87 };
88 return reason_names[compile_reason];
89 }
90
91 static bool reason_is_precompiled(CompileTask::CompileReason compile_reason) {
92 return (compile_reason == CompileTask::Reason_Precompile) ||
93 (compile_reason == CompileTask::Reason_PrecompileForPreload);
94 }
95
96 private:
97 static CompileTask* _task_free_list;
98 static int _active_tasks;
99 Monitor* _lock;
100 int _compile_id;
101 Method* _method;
102 jobject _method_holder;
103 int _osr_bci;
104 bool _is_complete;
105 bool _is_success;
106 bool _requires_online_compilation;
107 bool _is_blocking;
108 CodeSection::csize_t _nm_content_size;
109 CodeSection::csize_t _nm_total_size;
110 CodeSection::csize_t _nm_insts_size;
111 DirectiveSet* _directive;
112 AbstractCompiler* _compiler;
113 SCCEntry* _scc_entry;
114 #if INCLUDE_JVMCI
115 bool _has_waiter;
116 // Compilation state for a blocking JVMCI compilation
117 JVMCICompileState* _blocking_jvmci_compile_state;
118 #endif
119 int _waiting_count; // See waiting_for_completion_count()
120 int _comp_level;
121 int _num_inlined_bytecodes;
122 CompileTask* _next;
123 CompileTask* _prev;
124 bool _is_free;
125 // Fields used for logging why the compilation was initiated:
126 jlong _time_created; // time when task was created
127 jlong _time_queued; // time when task was enqueued
128 jlong _time_started; // time when compilation started
129 jlong _time_finished; // time when compilation finished
130 jlong _aot_load_start;
131 jlong _aot_load_finish;
132 Method* _hot_method; // which method actually triggered this task
133 jobject _hot_method_holder;
134 int _hot_count; // information about its invocation counter
135 CompileReason _compile_reason; // more info about the task
136 const char* _failure_reason;
137 // Specifies if _failure_reason is on the C heap.
138 bool _failure_reason_on_C_heap;
139 CompileTrainingData* _training_data;
140 CompileQueue* _compile_queue;
141 size_t _arena_bytes; // peak size of temporary memory during compilation (e.g. node arenas)
142
143 public:
144 CompileTask() : _failure_reason(nullptr), _failure_reason_on_C_heap(false) {
145 // May hold MethodCompileQueue_lock
146 _lock = new Monitor(Mutex::safepoint-1, "CompileTask_lock");
147 }
148
149 void initialize(int compile_id, const methodHandle& method, int osr_bci, int comp_level,
150 const methodHandle& hot_method, int hot_count, SCCEntry* scc_entry,
151 CompileTask::CompileReason compile_reason,
152 CompileQueue* compile_queue,
153 bool requires_online_compilation, bool is_blocking);
154
155 static CompileTask* allocate();
156 static void free(CompileTask* task);
157 static void wait_for_no_active_tasks();
158
159 int compile_id() const { return _compile_id; }
160 Method* method() const { return _method; }
161 Method* hot_method() const { return _hot_method; }
162 int osr_bci() const { return _osr_bci; }
163 bool is_complete() const { return _is_complete; }
164 bool is_blocking() const { return _is_blocking; }
165 bool is_success() const { return _is_success; }
166 bool is_scc() const { return _scc_entry != nullptr; }
167 void clear_scc() { _scc_entry = nullptr; }
168 SCCEntry* scc_entry() { return _scc_entry; }
169 bool requires_online_compilation() const { return _requires_online_compilation; }
170 DirectiveSet* directive() const { return _directive; }
171 CompileReason compile_reason() const { return _compile_reason; }
172 CodeSection::csize_t nm_content_size() { return _nm_content_size; }
173 void set_nm_content_size(CodeSection::csize_t size) { _nm_content_size = size; }
174 CodeSection::csize_t nm_insts_size() { return _nm_insts_size; }
175 void set_nm_insts_size(CodeSection::csize_t size) { _nm_insts_size = size; }
176 CodeSection::csize_t nm_total_size() { return _nm_total_size; }
177 void set_nm_total_size(CodeSection::csize_t size) { _nm_total_size = size; }
178 bool preload() const { return (_compile_reason == Reason_Preload); }
179 bool can_become_stale() const {
180 switch (_compile_reason) {
181 case Reason_BackedgeCount:
182 case Reason_InvocationCount:
183 case Reason_Tiered:
184 return !_is_blocking;
185 default:
186 return false;
187 }
188 }
189 #if INCLUDE_JVMCI
190 bool should_wait_for_compilation() const {
191 // Wait for blocking compilation to finish.
192 switch (_compile_reason) {
193 case Reason_Replay:
194 case Reason_Whitebox:
195 case Reason_Bootstrap:
196 return _is_blocking;
197 default:
198 return false;
199 }
200 }
201
202 bool has_waiter() const { return _has_waiter; }
203 void clear_waiter() { _has_waiter = false; }
204 JVMCICompileState* blocking_jvmci_compile_state() const { return _blocking_jvmci_compile_state; }
205 void set_blocking_jvmci_compile_state(JVMCICompileState* state) {
206 _blocking_jvmci_compile_state = state;
207 }
208 #endif
209
210 bool is_precompiled() {
211 return reason_is_precompiled(compile_reason());
212 }
213
214 Monitor* lock() const { return _lock; }
215 CompileQueue* compile_queue() const { return _compile_queue; }
216
217 // See how many threads are waiting for this task. Must have lock to read this.
218 int waiting_for_completion_count() {
219 assert(_lock->owned_by_self(), "must have lock to use waiting_for_completion_count()");
220 return _waiting_count;
221 }
222 // Indicates that a thread is waiting for this task to complete. Must have lock to use this.
223 void inc_waiting_for_completion() {
224 assert(_lock->owned_by_self(), "must have lock to use inc_waiting_for_completion()");
225 _waiting_count++;
226 }
227 // Indicates that a thread stopped waiting for this task to complete. Must have lock to use this.
228 void dec_waiting_for_completion() {
229 assert(_lock->owned_by_self(), "must have lock to use dec_waiting_for_completion()");
230 assert(_waiting_count > 0, "waiting count is not positive");
231 _waiting_count--;
232 }
233
234 void mark_complete() { _is_complete = true; }
235 void mark_success() { _is_success = true; }
236 void mark_queued(jlong time) { _time_queued = time; }
237 void mark_started(jlong time) { _time_started = time; }
238 void mark_finished(jlong time) { _time_finished = time; }
239 void mark_aot_load_start(jlong time) { _aot_load_start = time; }
240 void mark_aot_load_finish(jlong time) { _aot_load_finish = time; }
241 int comp_level() { return _comp_level;}
242 void set_comp_level(int comp_level) { _comp_level = comp_level;}
243
244 CompileReason compile_reason() { return _compile_reason; }
245
246 AbstractCompiler* compiler() const;
247 CompileTask* select_for_compilation();
248
249 int num_inlined_bytecodes() const { return _num_inlined_bytecodes; }
250 void set_num_inlined_bytecodes(int n) { _num_inlined_bytecodes = n; }
251
252 static CompileTask* volatile* next_ptr(CompileTask& task) { return &task._next; }
253
254 CompileTask* next() const { return _next; }
255 void set_next(CompileTask* next) { _next = next; }
256 CompileTask* prev() const { return _prev; }
257 void set_prev(CompileTask* prev) { _prev = prev; }
258 bool is_free() const { return _is_free; }
259 void set_is_free(bool val) { _is_free = val; }
260 bool is_unloaded() const;
261
262 CompileTrainingData* training_data() const { return _training_data; }
263 void set_training_data(CompileTrainingData*td) { _training_data = td; }
264
265 // RedefineClasses support
266 void metadata_do(MetadataClosure* f);
267 void mark_on_stack();
268
269 void set_arena_bytes(size_t s) { _arena_bytes = s; }
270 size_t arena_bytes() const { return _arena_bytes; }
271
272 private:
273 static void print_impl(outputStream* st, Method* method, int compile_id, int comp_level,
274 bool is_osr_method = false, int osr_bci = -1, bool is_blocking = false,
275 bool is_scc = false, bool is_preload = false,
276 const char* compiler_name = nullptr,
277 const char* msg = nullptr, bool short_form = false, bool cr = true,
278 jlong time_created = 0, jlong time_queued = 0, jlong time_started = 0, jlong time_finished = 0,
279 jlong aot_load_start = 0, jlong aot_load_finish = 0);
280
281 public:
282 void print(outputStream* st = tty, const char* msg = nullptr, bool short_form = false, bool cr = true);
283 void print_ul(const char* msg = nullptr);
284 static void print(outputStream* st, const nmethod* nm, const char* msg = nullptr, bool short_form = false, bool cr = true) {
285 print_impl(st, nm->method(), nm->compile_id(), nm->comp_level(),
286 nm->is_osr_method(), nm->is_osr_method() ? nm->osr_entry_bci() : -1, /*is_blocking*/ false,
287 nm->scc_entry() != nullptr, nm->preloaded(),
288 nm->compiler_name(), msg, short_form, cr);
289 }
290 static void print_ul(const nmethod* nm, const char* msg = nullptr);
291
292 /**
293 * @deprecated Please rely on Compile::inline_printer. Do not directly write inlining information to tty.
294 */
295 static void print_inline_indent(int inline_level, outputStream* st = tty);
296
297 void print_tty();
298 void print_line_on_error(outputStream* st, char* buf, int buflen);
299
300 void log_task(xmlStream* log);
301 void log_task_queued();
302 void log_task_start(CompileLog* log);
303 void log_task_done(CompileLog* log);
304
305 void set_failure_reason(const char* reason, bool on_C_heap = false) {
306 _failure_reason = reason;
307 _failure_reason_on_C_heap = on_C_heap;
308 }
309
310 bool check_break_at_flags();
311
312 static void print_inlining_header(outputStream* st, ciMethod* method, int inline_level, int bci);
313 static void print_inlining_inner(outputStream* st, ciMethod* method, int inline_level, int bci, InliningResult result, const char* msg = nullptr);
314 static void print_inline_inner_method_info(outputStream* st, ciMethod* method);
315 static void print_inlining_inner_message(outputStream* st, InliningResult result, const char* msg);
316
317 static void print_inlining_tty(ciMethod* method, int inline_level, int bci, InliningResult result, const char* msg = nullptr) {
318 print_inlining_inner(tty, method, inline_level, bci, result, msg);
319 }
320 static void print_inlining_ul(ciMethod* method, int inline_level, int bci, InliningResult result, const char* msg = nullptr);
321 };
322
323 #endif // SHARE_COMPILER_COMPILETASK_HPP