1 /*
2 * Copyright (c) 2004, 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.
62 case T_LONG: name = "jni_fast_GetLongField"; break;
63 case T_FLOAT: name = "jni_fast_GetFloatField"; break;
64 case T_DOUBLE: name = "jni_fast_GetDoubleField"; break;
65 default: ShouldNotReachHere();
66 name = NULL; // unreachable
67 }
68 ResourceMark rm;
69 BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE);
70 CodeBuffer cbuf(blob);
71 MacroAssembler* masm = new MacroAssembler(&cbuf);
72 address fast_entry = __ pc();
73
74 Label slow;
75
76 unsigned long offset;
77 __ adrp(rcounter_addr,
78 SafepointSynchronize::safepoint_counter_addr(), offset);
79 Address safepoint_counter_addr(rcounter_addr, offset);
80 __ ldrw(rcounter, safepoint_counter_addr);
81 __ tbnz(rcounter, 0, slow);
82 __ eor(robj, c_rarg1, rcounter);
83 __ eor(robj, robj, rcounter); // obj, since
84 // robj ^ rcounter ^ rcounter == robj
85 // robj is address dependent on rcounter.
86
87 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
88 bs->try_resolve_jobject_in_native(masm, c_rarg0, robj, rscratch1, slow);
89
90 __ lsr(roffset, c_rarg2, 2); // offset
91
92 assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
93 speculative_load_pclist[count] = __ pc(); // Used by the segfault handler
94 switch (type) {
95 case T_BOOLEAN: __ ldrb (result, Address(robj, roffset)); break;
96 case T_BYTE: __ ldrsb (result, Address(robj, roffset)); break;
97 case T_CHAR: __ ldrh (result, Address(robj, roffset)); break;
98 case T_SHORT: __ ldrsh (result, Address(robj, roffset)); break;
99 case T_FLOAT: __ ldrw (result, Address(robj, roffset)); break;
100 case T_INT: __ ldrsw (result, Address(robj, roffset)); break;
101 case T_DOUBLE:
102 case T_LONG: __ ldr (result, Address(robj, roffset)); break;
103 default: ShouldNotReachHere();
104 }
105
106 // counter_addr is address dependent on result.
107 __ eor(rcounter_addr, rcounter_addr, result);
108 __ eor(rcounter_addr, rcounter_addr, result);
109 __ ldrw(rscratch1, safepoint_counter_addr);
110 __ cmpw(rcounter, rscratch1);
111 __ br (Assembler::NE, slow);
112
113 switch (type) {
114 case T_FLOAT: __ fmovs(v0, result); break;
115 case T_DOUBLE: __ fmovd(v0, result); break;
116 default: __ mov(r0, result); break;
117 }
118 __ ret(lr);
119
120 slowcase_entry_pclist[count++] = __ pc();
121 __ bind(slow);
122 address slow_case_addr;
123 switch (type) {
124 case T_BOOLEAN: slow_case_addr = jni_GetBooleanField_addr(); break;
125 case T_BYTE: slow_case_addr = jni_GetByteField_addr(); break;
126 case T_CHAR: slow_case_addr = jni_GetCharField_addr(); break;
127 case T_SHORT: slow_case_addr = jni_GetShortField_addr(); break;
128 case T_INT: slow_case_addr = jni_GetIntField_addr(); break;
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1 /*
2 * Copyright (c) 2004, 2019, 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.
62 case T_LONG: name = "jni_fast_GetLongField"; break;
63 case T_FLOAT: name = "jni_fast_GetFloatField"; break;
64 case T_DOUBLE: name = "jni_fast_GetDoubleField"; break;
65 default: ShouldNotReachHere();
66 name = NULL; // unreachable
67 }
68 ResourceMark rm;
69 BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE);
70 CodeBuffer cbuf(blob);
71 MacroAssembler* masm = new MacroAssembler(&cbuf);
72 address fast_entry = __ pc();
73
74 Label slow;
75
76 unsigned long offset;
77 __ adrp(rcounter_addr,
78 SafepointSynchronize::safepoint_counter_addr(), offset);
79 Address safepoint_counter_addr(rcounter_addr, offset);
80 __ ldrw(rcounter, safepoint_counter_addr);
81 __ tbnz(rcounter, 0, slow);
82
83 if (JvmtiExport::can_post_field_access()) {
84 // Using barrier to order wrt. JVMTI check and load of result.
85 __ membar(Assembler::LoadLoad);
86
87 // Check to see if a field access watch has been set before we
88 // take the fast path.
89 unsigned long offset2;
90 __ adrp(result,
91 ExternalAddress((address) JvmtiExport::get_field_access_count_addr()),
92 offset2);
93 __ ldrw(result, Address(result, offset2));
94 __ cbnzw(result, slow);
95
96 __ mov(robj, c_rarg1);
97 } else {
98 // Using address dependency to order wrt. load of result.
99 __ eor(robj, c_rarg1, rcounter);
100 __ eor(robj, robj, rcounter); // obj, since
101 // robj ^ rcounter ^ rcounter == robj
102 // robj is address dependent on rcounter.
103 }
104
105 // Both robj and rscratch1 are clobbered by try_resolve_jobject_in_native.
106 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
107 bs->try_resolve_jobject_in_native(masm, c_rarg0, robj, rscratch1, slow);
108
109 __ lsr(roffset, c_rarg2, 2); // offset
110
111 assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
112 speculative_load_pclist[count] = __ pc(); // Used by the segfault handler
113 switch (type) {
114 case T_BOOLEAN: __ ldrb (result, Address(robj, roffset)); break;
115 case T_BYTE: __ ldrsb (result, Address(robj, roffset)); break;
116 case T_CHAR: __ ldrh (result, Address(robj, roffset)); break;
117 case T_SHORT: __ ldrsh (result, Address(robj, roffset)); break;
118 case T_FLOAT: __ ldrw (result, Address(robj, roffset)); break;
119 case T_INT: __ ldrsw (result, Address(robj, roffset)); break;
120 case T_DOUBLE:
121 case T_LONG: __ ldr (result, Address(robj, roffset)); break;
122 default: ShouldNotReachHere();
123 }
124
125 if (JvmtiExport::can_post_field_access()) {
126 // Order JVMTI check and load of result wrt. succeeding check.
127 __ membar(Assembler::LoadLoad);
128 } else {
129 // counter_addr is address dependent on result.
130 __ eor(rcounter_addr, rcounter_addr, result);
131 __ eor(rcounter_addr, rcounter_addr, result);
132 }
133
134 __ ldrw(rscratch1, safepoint_counter_addr);
135 __ cmpw(rcounter, rscratch1);
136 __ br (Assembler::NE, slow);
137
138 switch (type) {
139 case T_FLOAT: __ fmovs(v0, result); break;
140 case T_DOUBLE: __ fmovd(v0, result); break;
141 default: __ mov(r0, result); break;
142 }
143 __ ret(lr);
144
145 slowcase_entry_pclist[count++] = __ pc();
146 __ bind(slow);
147 address slow_case_addr;
148 switch (type) {
149 case T_BOOLEAN: slow_case_addr = jni_GetBooleanField_addr(); break;
150 case T_BYTE: slow_case_addr = jni_GetByteField_addr(); break;
151 case T_CHAR: slow_case_addr = jni_GetCharField_addr(); break;
152 case T_SHORT: slow_case_addr = jni_GetShortField_addr(); break;
153 case T_INT: slow_case_addr = jni_GetIntField_addr(); break;
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