1/*
2 * Copyright (c) 1998, 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.
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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.
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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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// CompileTask
35//
36// An entry in the compile queue. It represents a pending or current
37// compilation.
38
39class CompileTask : public CHeapObj<mtCompiler> {
40 friend class VMStructs;
41 friend class JVMCIVMStructs;
42
43 public:
44 // Different reasons for a compilation
45 // The order is important - Reason_Whitebox and higher can not become
46 // stale, see CompileTask::can_become_stale()
47 // Also mapped to reason_names[]
48 enum CompileReason {
49 Reason_None,
50 Reason_InvocationCount, // Simple/StackWalk-policy
51 Reason_BackedgeCount, // Simple/StackWalk-policy
52 Reason_Tiered, // Tiered-policy
53 Reason_CTW, // Compile the world
54 Reason_Replay, // ciReplay
55 Reason_Whitebox, // Whitebox API
56 Reason_MustBeCompiled, // Java callHelper, LinkResolver
57 Reason_Bootstrap, // JVMCI bootstrap
58 Reason_Count
59 };
60
61 static const char* reason_name(CompileTask::CompileReason compile_reason) {
62 static const char* reason_names[] = {
63 "no_reason",
64 "count",
65 "backedge_count",
66 "tiered",
67 "CTW",
68 "replay",
69 "whitebox",
70 "must_be_compiled",
71 "bootstrap"
72 };
73 return reason_names[compile_reason];
74 }
75
76 private:
77 static CompileTask* _task_free_list;
78#ifdef ASSERT
79 static int _num_allocated_tasks;
80#endif
81
82 Monitor* _lock;
83 uint _compile_id;
84 Method* _method;
85 jobject _method_holder;
86 int _osr_bci;
87 bool _is_complete;
88 bool _is_success;
89 bool _is_blocking;
90#if INCLUDE_JVMCI
91 bool _has_waiter;
92 // Compiler thread for a blocking JVMCI compilation
93 CompilerThread* _jvmci_compiler_thread;
94#endif
95 int _comp_level;
96 int _num_inlined_bytecodes;
97 nmethodLocker* _code_handle; // holder of eventual result
98 CompileTask* _next, *_prev;
99 bool _is_free;
100 // Fields used for logging why the compilation was initiated:
101 jlong _time_queued; // time when task was enqueued
102 jlong _time_started; // time when compilation started
103 Method* _hot_method; // which method actually triggered this task
104 jobject _hot_method_holder;
105 int _hot_count; // information about its invocation counter
106 CompileReason _compile_reason; // more info about the task
107 const char* _failure_reason;
108 // Specifies if _failure_reason is on the C heap.
109 bool _failure_reason_on_C_heap;
110
111 public:
112 CompileTask() : _failure_reason(NULL), _failure_reason_on_C_heap(false) {
113 _lock = new Monitor(Mutex::nonleaf+2, "CompileTaskLock");
114 }
115
116 void initialize(int compile_id, const methodHandle& method, int osr_bci, int comp_level,
117 const methodHandle& hot_method, int hot_count,
118 CompileTask::CompileReason compile_reason, bool is_blocking);
119
120 static CompileTask* allocate();
121 static void free(CompileTask* task);
122
123 int compile_id() const { return _compile_id; }
124 Method* method() const { return _method; }
125 Method* hot_method() const { return _hot_method; }
126 int osr_bci() const { return _osr_bci; }
127 bool is_complete() const { return _is_complete; }
128 bool is_blocking() const { return _is_blocking; }
129 bool is_success() const { return _is_success; }
130 bool can_become_stale() const {
131 switch (_compile_reason) {
132 case Reason_BackedgeCount:
133 case Reason_InvocationCount:
134 case Reason_Tiered:
135 return !_is_blocking;
136 default:
137 return false;
138 }
139 }
140#if INCLUDE_JVMCI
141 bool has_waiter() const { return _has_waiter; }
142 void clear_waiter() { _has_waiter = false; }
143 CompilerThread* jvmci_compiler_thread() const { return _jvmci_compiler_thread; }
144 void set_jvmci_compiler_thread(CompilerThread* t) {
145 assert(is_blocking(), "must be");
146 assert((t == NULL) != (_jvmci_compiler_thread == NULL), "must be");
147 _jvmci_compiler_thread = t;
148 }
149#endif
150
151 nmethodLocker* code_handle() const { return _code_handle; }
152 void set_code_handle(nmethodLocker* l) { _code_handle = l; }
153 nmethod* code() const; // _code_handle->code()
154 void set_code(nmethod* nm); // _code_handle->set_code(nm)
155
156 Monitor* lock() const { return _lock; }
157
158 void mark_complete() { _is_complete = true; }
159 void mark_success() { _is_success = true; }
160 void mark_started(jlong time) { _time_started = time; }
161
162 int comp_level() { return _comp_level;}
163 void set_comp_level(int comp_level) { _comp_level = comp_level;}
164
165 AbstractCompiler* compiler();
166 CompileTask* select_for_compilation();
167
168 int num_inlined_bytecodes() const { return _num_inlined_bytecodes; }
169 void set_num_inlined_bytecodes(int n) { _num_inlined_bytecodes = n; }
170
171 CompileTask* next() const { return _next; }
172 void set_next(CompileTask* next) { _next = next; }
173 CompileTask* prev() const { return _prev; }
174 void set_prev(CompileTask* prev) { _prev = prev; }
175 bool is_free() const { return _is_free; }
176 void set_is_free(bool val) { _is_free = val; }
177 bool is_unloaded() const;
178
179 // RedefineClasses support
180 void metadata_do(MetadataClosure* f);
181 void mark_on_stack();
182
183private:
184 static void print_impl(outputStream* st, Method* method, int compile_id, int comp_level,
185 bool is_osr_method = false, int osr_bci = -1, bool is_blocking = false,
186 const char* msg = NULL, bool short_form = false, bool cr = true,
187 jlong time_queued = 0, jlong time_started = 0);
188
189public:
190 void print(outputStream* st = tty, const char* msg = NULL, bool short_form = false, bool cr = true);
191 void print_ul(const char* msg = NULL);
192 static void print(outputStream* st, const nmethod* nm, const char* msg = NULL, bool short_form = false, bool cr = true) {
193 print_impl(st, nm->method(), nm->compile_id(), nm->comp_level(),
194 nm->is_osr_method(), nm->is_osr_method() ? nm->osr_entry_bci() : -1, /*is_blocking*/ false,
195 msg, short_form, cr);
196 }
197 static void print_ul(const nmethod* nm, const char* msg = NULL);
198
199 static void print_inline_indent(int inline_level, outputStream* st = tty);
200
201 void print_tty();
202 void print_line_on_error(outputStream* st, char* buf, int buflen);
203
204 void log_task(xmlStream* log);
205 void log_task_queued();
206 void log_task_start(CompileLog* log);
207 void log_task_done(CompileLog* log);
208
209 void set_failure_reason(const char* reason, bool on_C_heap = false) {
210 _failure_reason = reason;
211 _failure_reason_on_C_heap = on_C_heap;
212 }
213
214 bool check_break_at_flags();
215
216 static void print_inlining_inner(outputStream* st, ciMethod* method, int inline_level, int bci, const char* msg = NULL);
217 static void print_inlining_tty(ciMethod* method, int inline_level, int bci, const char* msg = NULL) {
218 print_inlining_inner(tty, method, inline_level, bci, msg);
219 }
220 static void print_inlining_ul(ciMethod* method, int inline_level, int bci, const char* msg = NULL);
221};
222
223#endif // SHARE_COMPILER_COMPILETASK_HPP
224