1 /*
2 * Copyright (c) 2003, 2020, 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.
53 VtableStub* s = new(stub_code_length) VtableStub(true, vtable_index);
54 // Can be NULL if there is no free space in the code cache.
55 if (s == NULL) {
56 return NULL;
57 }
58
59 // Count unused bytes in instruction sequences of variable size.
60 // We add them to the computed buffer size in order to avoid
61 // overflow in subsequently generated stubs.
62 address start_pc;
63 int slop_bytes = 0;
64 int slop_delta = 0;
65
66 ResourceMark rm;
67 CodeBuffer cb(s->entry_point(), stub_code_length);
68 MacroAssembler* masm = new MacroAssembler(&cb);
69
70 #if (!defined(PRODUCT) && defined(COMPILER2))
71 if (CountCompiledCalls) {
72 __ lea(r16, ExternalAddress((address) SharedRuntime::nof_megamorphic_calls_addr()));
73 __ incrementw(Address(r16));
74 }
75 #endif
76
77 // get receiver (need to skip return address on top of stack)
78 assert(VtableStub::receiver_location() == j_rarg0->as_VMReg(), "receiver expected in j_rarg0");
79
80 // get receiver klass
81 address npe_addr = __ pc();
82 __ load_klass(r16, j_rarg0);
83
84 #ifndef PRODUCT
85 if (DebugVtables) {
86 Label L;
87 // TODO: find upper bound for this debug code.
88 start_pc = __ pc();
89
90 // check offset vs vtable length
91 __ ldrw(rscratch1, Address(r16, Klass::vtable_length_offset()));
92 __ cmpw(rscratch1, vtable_index * vtableEntry::size());
93 __ br(Assembler::GT, L);
128 // r2: receiver
129 address ame_addr = __ pc();
130 __ ldr(rscratch1, Address(rmethod, Method::from_compiled_offset()));
131 __ br(rscratch1);
132
133 masm->flush();
134 bookkeeping(masm, tty, s, npe_addr, ame_addr, true, vtable_index, slop_bytes, 0);
135
136 return s;
137 }
138
139
140 VtableStub* VtableStubs::create_itable_stub(int itable_index) {
141 // Read "A word on VtableStub sizing" in share/code/vtableStubs.hpp for details on stub sizing.
142 const int stub_code_length = code_size_limit(false);
143 VtableStub* s = new(stub_code_length) VtableStub(false, itable_index);
144 // Can be NULL if there is no free space in the code cache.
145 if (s == NULL) {
146 return NULL;
147 }
148 // Count unused bytes in instruction sequences of variable size.
149 // We add them to the computed buffer size in order to avoid
150 // overflow in subsequently generated stubs.
151 address start_pc;
152 int slop_bytes = 0;
153 int slop_delta = 0;
154
155 ResourceMark rm;
156 CodeBuffer cb(s->entry_point(), stub_code_length);
157 MacroAssembler* masm = new MacroAssembler(&cb);
158
159 #if (!defined(PRODUCT) && defined(COMPILER2))
160 if (CountCompiledCalls) {
161 __ lea(r10, ExternalAddress((address) SharedRuntime::nof_megamorphic_calls_addr()));
162 __ incrementw(Address(r10));
163 }
164 #endif
165
166 // get receiver (need to skip return address on top of stack)
167 assert(VtableStub::receiver_location() == j_rarg0->as_VMReg(), "receiver expected in j_rarg0");
168
169 // Entry arguments:
170 // rscratch2: CompiledICHolder
171 // j_rarg0: Receiver
172
173 // This stub is called from compiled code which has no callee-saved registers,
174 // so all registers except arguments are free at this point.
175 const Register recv_klass_reg = r10;
176 const Register holder_klass_reg = r16; // declaring interface klass (DECC)
177 const Register resolved_klass_reg = rmethod; // resolved interface klass (REFC)
178 const Register temp_reg = r11;
179 const Register temp_reg2 = r15;
180 const Register icholder_reg = rscratch2;
181
182 Label L_no_such_interface;
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1 /*
2 * Copyright (c) 2003, 2021, 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.
53 VtableStub* s = new(stub_code_length) VtableStub(true, vtable_index);
54 // Can be NULL if there is no free space in the code cache.
55 if (s == NULL) {
56 return NULL;
57 }
58
59 // Count unused bytes in instruction sequences of variable size.
60 // We add them to the computed buffer size in order to avoid
61 // overflow in subsequently generated stubs.
62 address start_pc;
63 int slop_bytes = 0;
64 int slop_delta = 0;
65
66 ResourceMark rm;
67 CodeBuffer cb(s->entry_point(), stub_code_length);
68 MacroAssembler* masm = new MacroAssembler(&cb);
69
70 #if (!defined(PRODUCT) && defined(COMPILER2))
71 if (CountCompiledCalls) {
72 __ lea(r16, ExternalAddress((address) SharedRuntime::nof_megamorphic_calls_addr()));
73 __ increment(Address(r16));
74 }
75 #endif
76
77 // get receiver (need to skip return address on top of stack)
78 assert(VtableStub::receiver_location() == j_rarg0->as_VMReg(), "receiver expected in j_rarg0");
79
80 // get receiver klass
81 address npe_addr = __ pc();
82 __ load_klass(r16, j_rarg0);
83
84 #ifndef PRODUCT
85 if (DebugVtables) {
86 Label L;
87 // TODO: find upper bound for this debug code.
88 start_pc = __ pc();
89
90 // check offset vs vtable length
91 __ ldrw(rscratch1, Address(r16, Klass::vtable_length_offset()));
92 __ cmpw(rscratch1, vtable_index * vtableEntry::size());
93 __ br(Assembler::GT, L);
128 // r2: receiver
129 address ame_addr = __ pc();
130 __ ldr(rscratch1, Address(rmethod, Method::from_compiled_offset()));
131 __ br(rscratch1);
132
133 masm->flush();
134 bookkeeping(masm, tty, s, npe_addr, ame_addr, true, vtable_index, slop_bytes, 0);
135
136 return s;
137 }
138
139
140 VtableStub* VtableStubs::create_itable_stub(int itable_index) {
141 // Read "A word on VtableStub sizing" in share/code/vtableStubs.hpp for details on stub sizing.
142 const int stub_code_length = code_size_limit(false);
143 VtableStub* s = new(stub_code_length) VtableStub(false, itable_index);
144 // Can be NULL if there is no free space in the code cache.
145 if (s == NULL) {
146 return NULL;
147 }
148
149 // Count unused bytes in instruction sequences of variable size.
150 // We add them to the computed buffer size in order to avoid
151 // overflow in subsequently generated stubs.
152 address start_pc;
153 int slop_bytes = 0;
154 int slop_delta = 0;
155
156 ResourceMark rm;
157 CodeBuffer cb(s->entry_point(), stub_code_length);
158 MacroAssembler* masm = new MacroAssembler(&cb);
159
160 #if (!defined(PRODUCT) && defined(COMPILER2))
161 if (CountCompiledCalls) {
162 __ lea(r10, ExternalAddress((address) SharedRuntime::nof_megamorphic_calls_addr()));
163 __ increment(Address(r10));
164 }
165 #endif
166
167 // get receiver (need to skip return address on top of stack)
168 assert(VtableStub::receiver_location() == j_rarg0->as_VMReg(), "receiver expected in j_rarg0");
169
170 // Entry arguments:
171 // rscratch2: CompiledICHolder
172 // j_rarg0: Receiver
173
174 // This stub is called from compiled code which has no callee-saved registers,
175 // so all registers except arguments are free at this point.
176 const Register recv_klass_reg = r10;
177 const Register holder_klass_reg = r16; // declaring interface klass (DECC)
178 const Register resolved_klass_reg = rmethod; // resolved interface klass (REFC)
179 const Register temp_reg = r11;
180 const Register temp_reg2 = r15;
181 const Register icholder_reg = rscratch2;
182
183 Label L_no_such_interface;
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