1 /*
2 * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2014, Red Hat Inc. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
1161 __ mov(r0, (int)id);
1162 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), r0);
1163 __ should_not_reach_here();
1164 break;
1165 }
1166
1167 const Register pre_val = r0;
1168 const Register thread = rthread;
1169 const Register tmp = rscratch1;
1170
1171 Address in_progress(thread, in_bytes(JavaThread::satb_mark_queue_offset() +
1172 SATBMarkQueue::byte_offset_of_active()));
1173
1174 Address queue_index(thread, in_bytes(JavaThread::satb_mark_queue_offset() +
1175 SATBMarkQueue::byte_offset_of_index()));
1176 Address buffer(thread, in_bytes(JavaThread::satb_mark_queue_offset() +
1177 SATBMarkQueue::byte_offset_of_buf()));
1178
1179 Label done;
1180 Label runtime;
1181
1182 // Can we store original value in the thread's buffer?
1183 __ ldr(tmp, queue_index);
1184 __ cbz(tmp, runtime);
1185
1186 __ sub(tmp, tmp, wordSize);
1187 __ str(tmp, queue_index);
1188 __ ldr(rscratch2, buffer);
1189 __ add(tmp, tmp, rscratch2);
1190 f.load_argument(0, rscratch2);
1191 __ str(rscratch2, Address(tmp, 0));
1192 __ b(done);
1193
1194 __ bind(runtime);
1195 __ push_call_clobbered_registers();
1196 f.load_argument(0, pre_val);
1197 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_pre), pre_val, thread);
1198 __ pop_call_clobbered_registers();
1199 __ bind(done);
1200 }
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1 /*
2 * Copyright (c) 1999, 2017, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2014, Red Hat Inc. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
1161 __ mov(r0, (int)id);
1162 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), r0);
1163 __ should_not_reach_here();
1164 break;
1165 }
1166
1167 const Register pre_val = r0;
1168 const Register thread = rthread;
1169 const Register tmp = rscratch1;
1170
1171 Address in_progress(thread, in_bytes(JavaThread::satb_mark_queue_offset() +
1172 SATBMarkQueue::byte_offset_of_active()));
1173
1174 Address queue_index(thread, in_bytes(JavaThread::satb_mark_queue_offset() +
1175 SATBMarkQueue::byte_offset_of_index()));
1176 Address buffer(thread, in_bytes(JavaThread::satb_mark_queue_offset() +
1177 SATBMarkQueue::byte_offset_of_buf()));
1178
1179 Label done;
1180 Label runtime;
1181
1182 // Is marking still active?
1183 if (in_bytes(SATBMarkQueue::byte_width_of_active()) == 4) {
1184 __ ldrw(tmp, in_progress);
1185 } else {
1186 assert(in_bytes(SATBMarkQueue::byte_width_of_active()) == 1, "Assumption");
1187 __ ldrb(tmp, in_progress);
1188 }
1189 __ cbzw(tmp, done);
1190
1191 // Can we store original value in the thread's buffer?
1192 __ ldr(tmp, queue_index);
1193 __ cbz(tmp, runtime);
1194
1195 __ sub(tmp, tmp, wordSize);
1196 __ str(tmp, queue_index);
1197 __ ldr(rscratch2, buffer);
1198 __ add(tmp, tmp, rscratch2);
1199 f.load_argument(0, rscratch2);
1200 __ str(rscratch2, Address(tmp, 0));
1201 __ b(done);
1202
1203 __ bind(runtime);
1204 __ push_call_clobbered_registers();
1205 f.load_argument(0, pre_val);
1206 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_pre), pre_val, thread);
1207 __ pop_call_clobbered_registers();
1208 __ bind(done);
1209 }
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