Mercurial > hg > graal-compiler
annotate src/share/vm/interpreter/bytecode.cpp @ 1711:a6bff45449bc
6973570: OrderAccess::storestore() scales poorly on multi-socket x64 and sparc: cache-line ping-ponging
Summary: volatile store to static variable removed in favour of a volatile store to stack to avoid excessive cache coherency traffic; verified that the volatile store is not elided by any of our current compilers.
Reviewed-by: dholmes, dice, jcoomes, kvn
author | ysr |
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date | Tue, 10 Aug 2010 14:53:35 -0700 |
parents | 136b78722a08 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
1579 | 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_bytecode.cpp.incl" | |
27 | |
28 // Implementation of Bytecode | |
29 | |
1565 | 30 bool Bytecode::check_must_rewrite(Bytecodes::Code code) const { |
31 assert(Bytecodes::can_rewrite(code), "post-check only"); | |
0 | 32 |
33 // Some codes are conditionally rewriting. Look closely at them. | |
1565 | 34 switch (code) { |
0 | 35 case Bytecodes::_aload_0: |
36 // Even if RewriteFrequentPairs is turned on, | |
37 // the _aload_0 code might delay its rewrite until | |
38 // a following _getfield rewrites itself. | |
39 return false; | |
40 | |
41 case Bytecodes::_lookupswitch: | |
42 return false; // the rewrite is not done by the interpreter | |
43 | |
44 case Bytecodes::_new: | |
45 // (Could actually look at the class here, but the profit would be small.) | |
46 return false; // the rewrite is not always done | |
47 } | |
48 | |
49 // No other special cases. | |
50 return true; | |
51 } | |
52 | |
53 | |
1565 | 54 #ifdef ASSERT |
55 | |
56 void Bytecode::assert_same_format_as(Bytecodes::Code testbc, bool is_wide) const { | |
57 Bytecodes::Code thisbc = Bytecodes::cast(byte_at(0)); | |
58 if (thisbc == Bytecodes::_breakpoint) return; // let the assertion fail silently | |
59 if (is_wide) { | |
60 assert(thisbc == Bytecodes::_wide, "expected a wide instruction"); | |
61 thisbc = Bytecodes::cast(byte_at(1)); | |
62 if (thisbc == Bytecodes::_breakpoint) return; | |
63 } | |
64 int thisflags = Bytecodes::flags(testbc, is_wide) & Bytecodes::_all_fmt_bits; | |
65 int testflags = Bytecodes::flags(thisbc, is_wide) & Bytecodes::_all_fmt_bits; | |
66 if (thisflags != testflags) | |
67 tty->print_cr("assert_same_format_as(%d) failed on bc=%d%s; %d != %d", | |
68 (int)testbc, (int)thisbc, (is_wide?"/wide":""), testflags, thisflags); | |
69 assert(thisflags == testflags, "expected format"); | |
70 } | |
71 | |
72 void Bytecode::assert_index_size(int size, Bytecodes::Code bc, bool is_wide) { | |
73 int have_fmt = (Bytecodes::flags(bc, is_wide) | |
74 & (Bytecodes::_fmt_has_u2 | Bytecodes::_fmt_has_u4 | | |
75 Bytecodes::_fmt_not_simple | | |
76 // Not an offset field: | |
77 Bytecodes::_fmt_has_o)); | |
78 int need_fmt = -1; | |
79 switch (size) { | |
80 case 1: need_fmt = 0; break; | |
81 case 2: need_fmt = Bytecodes::_fmt_has_u2; break; | |
82 case 4: need_fmt = Bytecodes::_fmt_has_u4; break; | |
83 } | |
84 if (is_wide) need_fmt |= Bytecodes::_fmt_not_simple; | |
85 if (have_fmt != need_fmt) { | |
86 tty->print_cr("assert_index_size %d: bc=%d%s %d != %d", size, bc, (is_wide?"/wide":""), have_fmt, need_fmt); | |
87 assert(have_fmt == need_fmt, "assert_index_size"); | |
88 } | |
89 } | |
90 | |
91 void Bytecode::assert_offset_size(int size, Bytecodes::Code bc, bool is_wide) { | |
92 int have_fmt = Bytecodes::flags(bc, is_wide) & Bytecodes::_all_fmt_bits; | |
93 int need_fmt = -1; | |
94 switch (size) { | |
95 case 2: need_fmt = Bytecodes::_fmt_bo2; break; | |
96 case 4: need_fmt = Bytecodes::_fmt_bo4; break; | |
97 } | |
98 if (is_wide) need_fmt |= Bytecodes::_fmt_not_simple; | |
99 if (have_fmt != need_fmt) { | |
100 tty->print_cr("assert_offset_size %d: bc=%d%s %d != %d", size, bc, (is_wide?"/wide":""), have_fmt, need_fmt); | |
101 assert(have_fmt == need_fmt, "assert_offset_size"); | |
102 } | |
103 } | |
104 | |
105 void Bytecode::assert_constant_size(int size, int where, Bytecodes::Code bc, bool is_wide) { | |
106 int have_fmt = Bytecodes::flags(bc, is_wide) & (Bytecodes::_all_fmt_bits | |
107 // Ignore any 'i' field (for iinc): | |
108 & ~Bytecodes::_fmt_has_i); | |
109 int need_fmt = -1; | |
110 switch (size) { | |
111 case 1: need_fmt = Bytecodes::_fmt_bc; break; | |
112 case 2: need_fmt = Bytecodes::_fmt_bc | Bytecodes::_fmt_has_u2; break; | |
113 } | |
114 if (is_wide) need_fmt |= Bytecodes::_fmt_not_simple; | |
115 int length = is_wide ? Bytecodes::wide_length_for(bc) : Bytecodes::length_for(bc); | |
116 if (have_fmt != need_fmt || where + size != length) { | |
117 tty->print_cr("assert_constant_size %d @%d: bc=%d%s %d != %d", size, where, bc, (is_wide?"/wide":""), have_fmt, need_fmt); | |
118 } | |
119 assert(have_fmt == need_fmt, "assert_constant_size"); | |
120 assert(where + size == length, "assert_constant_size oob"); | |
121 } | |
122 | |
123 void Bytecode::assert_native_index(Bytecodes::Code bc, bool is_wide) { | |
124 assert((Bytecodes::flags(bc, is_wide) & Bytecodes::_fmt_has_nbo) != 0, "native index"); | |
125 } | |
126 | |
127 #endif //ASSERT | |
0 | 128 |
129 // Implementation of Bytecode_tableupswitch | |
130 | |
131 int Bytecode_tableswitch::dest_offset_at(int i) const { | |
1565 | 132 return get_Java_u4_at(aligned_offset(1 + (3 + i)*jintSize)); |
0 | 133 } |
134 | |
135 | |
136 // Implementation of Bytecode_invoke | |
137 | |
138 void Bytecode_invoke::verify() const { | |
139 assert(is_valid(), "check invoke"); | |
1565 | 140 assert(method()->constants()->cache() != NULL, "do not call this from verifier or rewriter"); |
0 | 141 } |
142 | |
143 | |
1602 | 144 symbolOop Bytecode_member_ref::signature() const { |
0 | 145 constantPoolOop constants = method()->constants(); |
146 return constants->signature_ref_at(index()); | |
147 } | |
148 | |
149 | |
1602 | 150 symbolOop Bytecode_member_ref::name() const { |
0 | 151 constantPoolOop constants = method()->constants(); |
152 return constants->name_ref_at(index()); | |
153 } | |
154 | |
155 | |
1602 | 156 BasicType Bytecode_member_ref::result_type(Thread *thread) const { |
0 | 157 symbolHandle sh(thread, signature()); |
158 ResultTypeFinder rts(sh); | |
159 rts.iterate(); | |
160 return rts.type(); | |
161 } | |
162 | |
163 | |
164 methodHandle Bytecode_invoke::static_target(TRAPS) { | |
165 methodHandle m; | |
166 KlassHandle resolved_klass; | |
167 constantPoolHandle constants(THREAD, _method->constants()); | |
168 | |
1602 | 169 if (java_code() == Bytecodes::_invokedynamic) { |
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170 LinkResolver::resolve_dynamic_method(m, resolved_klass, constants, index(), CHECK_(methodHandle())); |
1602 | 171 } else if (java_code() != Bytecodes::_invokeinterface) { |
0 | 172 LinkResolver::resolve_method(m, resolved_klass, constants, index(), CHECK_(methodHandle())); |
173 } else { | |
174 LinkResolver::resolve_interface_method(m, resolved_klass, constants, index(), CHECK_(methodHandle())); | |
175 } | |
176 return m; | |
177 } | |
178 | |
179 | |
1602 | 180 int Bytecode_member_ref::index() const { |
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181 // Note: Rewriter::rewrite changes the Java_u2 of an invokedynamic to a native_u4, |
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182 // at the same time it allocates per-call-site CP cache entries. |
1602 | 183 Bytecodes::Code rawc = code(); |
184 Bytecode* invoke = bytecode(); | |
185 if (invoke->has_index_u4(rawc)) | |
186 return invoke->get_index_u4(rawc); | |
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187 else |
1602 | 188 return invoke->get_index_u2_cpcache(rawc); |
0 | 189 } |
190 | |
1602 | 191 int Bytecode_member_ref::pool_index() const { |
192 int index = this->index(); | |
193 DEBUG_ONLY({ | |
194 if (!bytecode()->has_index_u4(code())) | |
195 index -= constantPoolOopDesc::CPCACHE_INDEX_TAG; | |
196 }); | |
197 return _method->constants()->cache()->entry_at(index)->constant_pool_index(); | |
198 } | |
0 | 199 |
200 // Implementation of Bytecode_field | |
201 | |
202 void Bytecode_field::verify() const { | |
1602 | 203 assert(is_valid(), "check field"); |
0 | 204 } |
205 | |
206 | |
1602 | 207 // Implementation of Bytecode_loadconstant |
208 | |
209 int Bytecode_loadconstant::raw_index() const { | |
210 Bytecode* bcp = bytecode(); | |
211 Bytecodes::Code rawc = bcp->code(); | |
212 assert(rawc != Bytecodes::_wide, "verifier prevents this"); | |
213 if (Bytecodes::java_code(rawc) == Bytecodes::_ldc) | |
214 return bcp->get_index_u1(rawc); | |
215 else | |
216 return bcp->get_index_u2(rawc, false); | |
0 | 217 } |
218 | |
1602 | 219 int Bytecode_loadconstant::pool_index() const { |
220 int index = raw_index(); | |
221 if (has_cache_index()) { | |
222 return _method->constants()->cache()->entry_at(index)->constant_pool_index(); | |
223 } | |
224 return index; | |
225 } | |
0 | 226 |
1602 | 227 BasicType Bytecode_loadconstant::result_type() const { |
228 int index = pool_index(); | |
229 constantTag tag = _method->constants()->tag_at(index); | |
230 return tag.basic_type(); | |
231 } | |
232 | |
233 oop Bytecode_loadconstant::resolve_constant(TRAPS) const { | |
234 assert(_method.not_null(), "must supply method to resolve constant"); | |
235 int index = raw_index(); | |
236 constantPoolOop constants = _method->constants(); | |
237 if (has_cache_index()) { | |
238 return constants->resolve_cached_constant_at(index, THREAD); | |
239 } else { | |
240 return constants->resolve_constant_at(index, THREAD); | |
1574 | 241 } |
0 | 242 } |
243 | |
244 //------------------------------------------------------------------------------ | |
245 // Non-product code | |
246 | |
247 #ifndef PRODUCT | |
248 | |
249 void Bytecode_lookupswitch::verify() const { | |
250 switch (Bytecodes::java_code(code())) { | |
251 case Bytecodes::_lookupswitch: | |
252 { int i = number_of_pairs() - 1; | |
253 while (i-- > 0) { | |
254 assert(pair_at(i)->match() < pair_at(i+1)->match(), "unsorted table entries"); | |
255 } | |
256 } | |
257 break; | |
258 default: | |
259 fatal("not a lookupswitch bytecode"); | |
260 } | |
261 } | |
262 | |
263 void Bytecode_tableswitch::verify() const { | |
264 switch (Bytecodes::java_code(code())) { | |
265 case Bytecodes::_tableswitch: | |
266 { int lo = low_key(); | |
267 int hi = high_key(); | |
268 assert (hi >= lo, "incorrect hi/lo values in tableswitch"); | |
269 int i = hi - lo - 1 ; | |
270 while (i-- > 0) { | |
271 // no special check needed | |
272 } | |
273 } | |
274 break; | |
275 default: | |
276 fatal("not a tableswitch bytecode"); | |
277 } | |
278 } | |
279 | |
280 #endif |