1 /*
2 * Copyright (c) 2018, 2021, Red Hat, Inc. 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 "gc/shared/gcArguments.hpp"
27 #include "gc/shared/tlab_globals.hpp"
28 #include "gc/shared/workerPolicy.hpp"
29 #include "gc/shenandoah/shenandoahArguments.hpp"
30 #include "gc/shenandoah/shenandoahCollectorPolicy.hpp"
31 #include "gc/shenandoah/shenandoahHeap.inline.hpp"
32 #include "gc/shenandoah/shenandoahHeapRegion.hpp"
33 #include "runtime/globals_extension.hpp"
34 #include "runtime/java.hpp"
35 #include "utilities/defaultStream.hpp"
36
37 void ShenandoahArguments::initialize() {
38 #if !(defined AARCH64 || defined AMD64 || defined IA32 || defined PPC64)
39 vm_exit_during_initialization("Shenandoah GC is not supported on this platform.");
40 #endif
41
42 #if 0 // leave this block as stepping stone for future platforms
43 log_warning(gc)("Shenandoah GC is not fully supported on this platform:");
44 log_warning(gc)(" concurrent modes are not supported, only STW cycles are enabled;");
45 log_warning(gc)(" arch-specific barrier code is not implemented, disabling barriers;");
46
47 FLAG_SET_DEFAULT(ShenandoahGCHeuristics, "passive");
48
49 FLAG_SET_DEFAULT(ShenandoahSATBBarrier, false);
50 FLAG_SET_DEFAULT(ShenandoahLoadRefBarrier, false);
51 FLAG_SET_DEFAULT(ShenandoahIUBarrier, false);
52 FLAG_SET_DEFAULT(ShenandoahCASBarrier, false);
53 FLAG_SET_DEFAULT(ShenandoahCloneBarrier, false);
54
55 FLAG_SET_DEFAULT(ShenandoahVerifyOptoBarriers, false);
56 #endif
57 if (UseLargePages) {
58 size_t large_page_size = os::large_page_size();
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1 /*
2 * Copyright (c) 2018, 2022, Red Hat, Inc. 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 "gc/shared/gcArguments.hpp"
27 #include "gc/shared/tlab_globals.hpp"
28 #include "gc/shared/workerPolicy.hpp"
29 #include "gc/shenandoah/shenandoahArguments.hpp"
30 #include "gc/shenandoah/shenandoahCollectorPolicy.hpp"
31 #include "gc/shenandoah/shenandoahHeap.inline.hpp"
32 #include "gc/shenandoah/shenandoahHeapRegion.hpp"
33 #include "runtime/globals_extension.hpp"
34 #include "runtime/java.hpp"
35 #include "utilities/defaultStream.hpp"
36
37 void ShenandoahArguments::initialize() {
38 #if !(defined AARCH64 || defined AMD64 || defined IA32 || defined PPC64 || defined RISCV64)
39 vm_exit_during_initialization("Shenandoah GC is not supported on this platform.");
40 #endif
41
42 #if 0 // leave this block as stepping stone for future platforms
43 log_warning(gc)("Shenandoah GC is not fully supported on this platform:");
44 log_warning(gc)(" concurrent modes are not supported, only STW cycles are enabled;");
45 log_warning(gc)(" arch-specific barrier code is not implemented, disabling barriers;");
46
47 FLAG_SET_DEFAULT(ShenandoahGCHeuristics, "passive");
48
49 FLAG_SET_DEFAULT(ShenandoahSATBBarrier, false);
50 FLAG_SET_DEFAULT(ShenandoahLoadRefBarrier, false);
51 FLAG_SET_DEFAULT(ShenandoahIUBarrier, false);
52 FLAG_SET_DEFAULT(ShenandoahCASBarrier, false);
53 FLAG_SET_DEFAULT(ShenandoahCloneBarrier, false);
54
55 FLAG_SET_DEFAULT(ShenandoahVerifyOptoBarriers, false);
56 #endif
57 if (UseLargePages) {
58 size_t large_page_size = os::large_page_size();
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