1 /*
2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012, 2025 SAP SE. 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.
27 #include "code/compiledIC.hpp"
28 #include "code/vtableStubs.hpp"
29 #include "interp_masm_ppc.hpp"
30 #include "memory/resourceArea.hpp"
31 #include "oops/instanceKlass.hpp"
32 #include "oops/klass.inline.hpp"
33 #include "oops/klassVtable.hpp"
34 #include "runtime/sharedRuntime.hpp"
35 #include "vmreg_ppc.inline.hpp"
36 #ifdef COMPILER2
37 #include "opto/runtime.hpp"
38 #endif
39
40 #define __ masm->
41
42 #ifndef PRODUCT
43 extern "C" void bad_compiled_vtable_index(JavaThread* thread, oopDesc* receiver, int index);
44 #endif
45
46 // Used by compiler only; may use only caller saved, non-argument registers.
47 VtableStub* VtableStubs::create_vtable_stub(int vtable_index) {
48 // Read "A word on VtableStub sizing" in share/code/vtableStubs.hpp for details on stub sizing.
49 const int stub_code_length = code_size_limit(true);
50 VtableStub* s = new(stub_code_length) VtableStub(true, vtable_index);
51 // Can be null if there is no free space in the code cache.
52 if (s == nullptr) {
53 return nullptr;
54 }
55
56 // Count unused bytes in instruction sequences of variable size.
57 // We add them to the computed buffer size in order to avoid
58 // overflow in subsequently generated stubs.
59 address start_pc;
60 int slop_bytes = 8; // just a two-instruction safety net
61 int slop_delta = 0;
62
63 ResourceMark rm;
64 CodeBuffer cb(s->entry_point(), stub_code_length);
65 MacroAssembler* masm = new MacroAssembler(&cb);
66
67 #if (!defined(PRODUCT) && defined(COMPILER2))
68 if (CountCompiledCalls) {
69 start_pc = __ pc();
70 int load_const_maxLen = 5*BytesPerInstWord; // load_const generates 5 instructions. Assume that as max size for laod_const_optimized
113 __ stop("Vtable entry is ZERO");
114 __ bind(L);
115 }
116 #endif
117
118 address ame_addr = __ pc(); // ame = abstract method error
119 // if the vtable entry is null, the method is abstract
120 // NOTE: for vtable dispatches, the vtable entry will never be null.
121
122 __ null_check(R19_method, in_bytes(Method::from_compiled_offset()), /*implicit only*/nullptr);
123 __ ld(R12_scratch2, in_bytes(Method::from_compiled_offset()), R19_method);
124 __ mtctr(R12_scratch2);
125 __ bctr();
126
127 masm->flush();
128 bookkeeping(masm, tty, s, npe_addr, ame_addr, true, vtable_index, slop_bytes, 0);
129
130 return s;
131 }
132
133 VtableStub* VtableStubs::create_itable_stub(int itable_index) {
134 // Read "A word on VtableStub sizing" in share/code/vtableStubs.hpp for details on stub sizing.
135 const int stub_code_length = code_size_limit(false);
136 VtableStub* s = new(stub_code_length) VtableStub(false, itable_index);
137 // Can be null if there is no free space in the code cache.
138 if (s == nullptr) {
139 return nullptr;
140 }
141
142 // Count unused bytes in instruction sequences of variable size.
143 // We add them to the computed buffer size in order to avoid
144 // overflow in subsequently generated stubs.
145 address start_pc;
146 int slop_bytes = 8; // just a two-instruction safety net
147 int slop_delta = 0;
148
149 ResourceMark rm;
150 CodeBuffer cb(s->entry_point(), stub_code_length);
151 MacroAssembler* masm = new MacroAssembler(&cb);
152 int load_const_maxLen = 5*BytesPerInstWord; // load_const generates 5 instructions. Assume that as max size for laod_const_optimized
153
154 #if (!defined(PRODUCT) && defined(COMPILER2))
155 if (CountCompiledCalls) {
156 start_pc = __ pc();
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1 /*
2 * Copyright (c) 1997, 2026, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012, 2025 SAP SE. 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.
27 #include "code/compiledIC.hpp"
28 #include "code/vtableStubs.hpp"
29 #include "interp_masm_ppc.hpp"
30 #include "memory/resourceArea.hpp"
31 #include "oops/instanceKlass.hpp"
32 #include "oops/klass.inline.hpp"
33 #include "oops/klassVtable.hpp"
34 #include "runtime/sharedRuntime.hpp"
35 #include "vmreg_ppc.inline.hpp"
36 #ifdef COMPILER2
37 #include "opto/runtime.hpp"
38 #endif
39
40 #define __ masm->
41
42 #ifndef PRODUCT
43 extern "C" void bad_compiled_vtable_index(JavaThread* thread, oopDesc* receiver, int index);
44 #endif
45
46 // Used by compiler only; may use only caller saved, non-argument registers.
47 VtableStub* VtableStubs::create_vtable_stub(int vtable_index, bool caller_is_c1) {
48 // Read "A word on VtableStub sizing" in share/code/vtableStubs.hpp for details on stub sizing.
49 const int stub_code_length = code_size_limit(true);
50 VtableStub* s = new(stub_code_length) VtableStub(true, vtable_index, caller_is_c1);
51 // Can be null if there is no free space in the code cache.
52 if (s == nullptr) {
53 return nullptr;
54 }
55
56 // Count unused bytes in instruction sequences of variable size.
57 // We add them to the computed buffer size in order to avoid
58 // overflow in subsequently generated stubs.
59 address start_pc;
60 int slop_bytes = 8; // just a two-instruction safety net
61 int slop_delta = 0;
62
63 ResourceMark rm;
64 CodeBuffer cb(s->entry_point(), stub_code_length);
65 MacroAssembler* masm = new MacroAssembler(&cb);
66
67 #if (!defined(PRODUCT) && defined(COMPILER2))
68 if (CountCompiledCalls) {
69 start_pc = __ pc();
70 int load_const_maxLen = 5*BytesPerInstWord; // load_const generates 5 instructions. Assume that as max size for laod_const_optimized
113 __ stop("Vtable entry is ZERO");
114 __ bind(L);
115 }
116 #endif
117
118 address ame_addr = __ pc(); // ame = abstract method error
119 // if the vtable entry is null, the method is abstract
120 // NOTE: for vtable dispatches, the vtable entry will never be null.
121
122 __ null_check(R19_method, in_bytes(Method::from_compiled_offset()), /*implicit only*/nullptr);
123 __ ld(R12_scratch2, in_bytes(Method::from_compiled_offset()), R19_method);
124 __ mtctr(R12_scratch2);
125 __ bctr();
126
127 masm->flush();
128 bookkeeping(masm, tty, s, npe_addr, ame_addr, true, vtable_index, slop_bytes, 0);
129
130 return s;
131 }
132
133 VtableStub* VtableStubs::create_itable_stub(int itable_index, bool caller_is_c1) {
134 // Read "A word on VtableStub sizing" in share/code/vtableStubs.hpp for details on stub sizing.
135 const int stub_code_length = code_size_limit(false);
136 VtableStub* s = new(stub_code_length) VtableStub(false, itable_index, caller_is_c1);
137 // Can be null if there is no free space in the code cache.
138 if (s == nullptr) {
139 return nullptr;
140 }
141
142 // Count unused bytes in instruction sequences of variable size.
143 // We add them to the computed buffer size in order to avoid
144 // overflow in subsequently generated stubs.
145 address start_pc;
146 int slop_bytes = 8; // just a two-instruction safety net
147 int slop_delta = 0;
148
149 ResourceMark rm;
150 CodeBuffer cb(s->entry_point(), stub_code_length);
151 MacroAssembler* masm = new MacroAssembler(&cb);
152 int load_const_maxLen = 5*BytesPerInstWord; // load_const generates 5 instructions. Assume that as max size for laod_const_optimized
153
154 #if (!defined(PRODUCT) && defined(COMPILER2))
155 if (CountCompiledCalls) {
156 start_pc = __ pc();
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