1 /*
2 * Copyright (c) 1999, 2015, 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 #include "precompiled.hpp"
26 #include "classfile/symbolTable.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "code/codeCache.hpp"
30 #include "code/dependencyContext.hpp"
31 #include "compiler/compileBroker.hpp"
32 #include "compiler/compileLog.hpp"
33 #include "compiler/compilerOracle.hpp"
34 #include "compiler/directivesParser.hpp"
35 #include "interpreter/linkResolver.hpp"
36 #include "memory/allocation.inline.hpp"
37 #include "oops/methodData.hpp"
38 #include "oops/method.hpp"
39 #include "oops/oop.inline.hpp"
40 #include "prims/nativeLookup.hpp"
41 #include "prims/whitebox.hpp"
42 #include "runtime/arguments.hpp"
43 #include "runtime/atomic.inline.hpp"
44 #include "runtime/compilationPolicy.hpp"
45 #include "runtime/init.hpp"
46 #include "runtime/interfaceSupport.hpp"
47 #include "runtime/javaCalls.hpp"
48 #include "runtime/os.hpp"
49 #include "runtime/sharedRuntime.hpp"
50 #include "runtime/sweeper.hpp"
51 #include "trace/tracing.hpp"
52 #include "utilities/dtrace.hpp"
53 #include "utilities/events.hpp"
54 #ifdef COMPILER1
887
888 // If this method is already in the compile queue, then
889 // we do not block the current thread.
890 if (compilation_is_in_queue(method)) {
891 // We may want to decay our counter a bit here to prevent
892 // multiple denied requests for compilation. This is an
893 // open compilation policy issue. Note: The other possibility,
894 // in the case that this is a blocking compile request, is to have
895 // all subsequent blocking requesters wait for completion of
896 // ongoing compiles. Note that in this case we'll need a protocol
897 // for freeing the associated compile tasks. [Or we could have
898 // a single static monitor on which all these waiters sleep.]
899 return;
900 }
901
902 // If the requesting thread is holding the pending list lock
903 // then we just return. We can't risk blocking while holding
904 // the pending list lock or a 3-way deadlock may occur
905 // between the reference handler thread, a GC (instigated
906 // by a compiler thread), and compiled method registration.
907 if (InstanceRefKlass::owns_pending_list_lock(JavaThread::current())) {
908 return;
909 }
910
911 if (TieredCompilation) {
912 // Tiered policy requires MethodCounters to exist before adding a method to
913 // the queue. Create if we don't have them yet.
914 method->get_method_counters(thread);
915 }
916
917 // Outputs from the following MutexLocker block:
918 CompileTask* task = NULL;
919 bool blocking = false;
920 CompileQueue* queue = compile_queue(comp_level);
921
922 // Acquire our lock.
923 {
924 MutexLocker locker(MethodCompileQueue_lock, thread);
925
926 // Make sure the method has not slipped into the queues since
927 // last we checked; note that those checks were "fast bail-outs".
1292 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1293 // only _compilation_id is incremented.
1294 return Atomic::add(1, &_compilation_id);
1295 #endif
1296 }
1297
1298 // ------------------------------------------------------------------
1299 // CompileBroker::assign_compile_id_unlocked
1300 //
1301 // Public wrapper for assign_compile_id that acquires the needed locks
1302 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1303 MutexLocker locker(MethodCompileQueue_lock, thread);
1304 return assign_compile_id(method, osr_bci);
1305 }
1306
1307 /**
1308 * Should the current thread block until this compilation request
1309 * has been fulfilled?
1310 */
1311 bool CompileBroker::is_compile_blocking() {
1312 assert(!InstanceRefKlass::owns_pending_list_lock(JavaThread::current()), "possible deadlock");
1313 return !BackgroundCompilation;
1314 }
1315
1316
1317 // ------------------------------------------------------------------
1318 // CompileBroker::preload_classes
1319 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) {
1320 // Move this code over from c1_Compiler.cpp
1321 ShouldNotReachHere();
1322 }
1323
1324
1325 // ------------------------------------------------------------------
1326 // CompileBroker::create_compile_task
1327 //
1328 // Create a CompileTask object representing the current request for
1329 // compilation. Add this task to the queue.
1330 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1331 int compile_id,
1332 const methodHandle& method,
|
1 /*
2 * Copyright (c) 1999, 2016, 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 #include "precompiled.hpp"
26 #include "classfile/symbolTable.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "code/codeCache.hpp"
30 #include "code/dependencyContext.hpp"
31 #include "compiler/compileBroker.hpp"
32 #include "compiler/compileLog.hpp"
33 #include "compiler/compilerOracle.hpp"
34 #include "compiler/directivesParser.hpp"
35 #include "gc/shared/referencePendingListLocker.hpp"
36 #include "interpreter/linkResolver.hpp"
37 #include "memory/allocation.inline.hpp"
38 #include "oops/methodData.hpp"
39 #include "oops/method.hpp"
40 #include "oops/oop.inline.hpp"
41 #include "prims/nativeLookup.hpp"
42 #include "prims/whitebox.hpp"
43 #include "runtime/arguments.hpp"
44 #include "runtime/atomic.inline.hpp"
45 #include "runtime/compilationPolicy.hpp"
46 #include "runtime/init.hpp"
47 #include "runtime/interfaceSupport.hpp"
48 #include "runtime/javaCalls.hpp"
49 #include "runtime/os.hpp"
50 #include "runtime/sharedRuntime.hpp"
51 #include "runtime/sweeper.hpp"
52 #include "trace/tracing.hpp"
53 #include "utilities/dtrace.hpp"
54 #include "utilities/events.hpp"
55 #ifdef COMPILER1
888
889 // If this method is already in the compile queue, then
890 // we do not block the current thread.
891 if (compilation_is_in_queue(method)) {
892 // We may want to decay our counter a bit here to prevent
893 // multiple denied requests for compilation. This is an
894 // open compilation policy issue. Note: The other possibility,
895 // in the case that this is a blocking compile request, is to have
896 // all subsequent blocking requesters wait for completion of
897 // ongoing compiles. Note that in this case we'll need a protocol
898 // for freeing the associated compile tasks. [Or we could have
899 // a single static monitor on which all these waiters sleep.]
900 return;
901 }
902
903 // If the requesting thread is holding the pending list lock
904 // then we just return. We can't risk blocking while holding
905 // the pending list lock or a 3-way deadlock may occur
906 // between the reference handler thread, a GC (instigated
907 // by a compiler thread), and compiled method registration.
908 if (ReferencePendingListLocker::is_locked_by_self()) {
909 return;
910 }
911
912 if (TieredCompilation) {
913 // Tiered policy requires MethodCounters to exist before adding a method to
914 // the queue. Create if we don't have them yet.
915 method->get_method_counters(thread);
916 }
917
918 // Outputs from the following MutexLocker block:
919 CompileTask* task = NULL;
920 bool blocking = false;
921 CompileQueue* queue = compile_queue(comp_level);
922
923 // Acquire our lock.
924 {
925 MutexLocker locker(MethodCompileQueue_lock, thread);
926
927 // Make sure the method has not slipped into the queues since
928 // last we checked; note that those checks were "fast bail-outs".
1293 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1294 // only _compilation_id is incremented.
1295 return Atomic::add(1, &_compilation_id);
1296 #endif
1297 }
1298
1299 // ------------------------------------------------------------------
1300 // CompileBroker::assign_compile_id_unlocked
1301 //
1302 // Public wrapper for assign_compile_id that acquires the needed locks
1303 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1304 MutexLocker locker(MethodCompileQueue_lock, thread);
1305 return assign_compile_id(method, osr_bci);
1306 }
1307
1308 /**
1309 * Should the current thread block until this compilation request
1310 * has been fulfilled?
1311 */
1312 bool CompileBroker::is_compile_blocking() {
1313 assert(!ReferencePendingListLocker::is_locked_by_self(), "possible deadlock");
1314 return !BackgroundCompilation;
1315 }
1316
1317
1318 // ------------------------------------------------------------------
1319 // CompileBroker::preload_classes
1320 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) {
1321 // Move this code over from c1_Compiler.cpp
1322 ShouldNotReachHere();
1323 }
1324
1325
1326 // ------------------------------------------------------------------
1327 // CompileBroker::create_compile_task
1328 //
1329 // Create a CompileTask object representing the current request for
1330 // compilation. Add this task to the queue.
1331 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1332 int compile_id,
1333 const methodHandle& method,
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