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src/cpu/sparc/vm/bytecodeInterpreter_sparc.inline.hpp@e1162778c1c8
src/cpu/sparc/vm/bytecodeInterpreter_sparc.inline.hpp
Thu, 07 Apr 2011 09:53:20 -0700
- author
- johnc
- date
- Thu, 07 Apr 2011 09:53:20 -0700
- changeset 2781
- e1162778c1c8
- parent 2314
- f95d63e2154a
- child 6876
- 710a3c8b516e
- permissions
- -rw-r--r--
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
Summary: A referent object that is only weakly reachable at the start of concurrent marking but is re-attached to the strongly reachable object graph during marking may not be marked as live. This can cause the reference object to be processed prematurely and leave dangling pointers to the referent object. Implement a read barrier for the java.lang.ref.Reference::referent field by intrinsifying the Reference.get() method, and intercepting accesses though JNI, reflection, and Unsafe, so that when a non-null referent object is read it is also logged in an SATB buffer.
Reviewed-by: kvn, iveresov, never, tonyp, dholmes
1 /*
2 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #ifndef CPU_SPARC_VM_BYTECODEINTERPRETER_SPARC_INLINE_HPP
26 #define CPU_SPARC_VM_BYTECODEINTERPRETER_SPARC_INLINE_HPP
28 // Inline interpreter functions for sparc
30 inline jfloat BytecodeInterpreter::VMfloatAdd(jfloat op1, jfloat op2) { return op1 + op2; }
31 inline jfloat BytecodeInterpreter::VMfloatSub(jfloat op1, jfloat op2) { return op1 - op2; }
32 inline jfloat BytecodeInterpreter::VMfloatMul(jfloat op1, jfloat op2) { return op1 * op2; }
33 inline jfloat BytecodeInterpreter::VMfloatDiv(jfloat op1, jfloat op2) { return op1 / op2; }
34 inline jfloat BytecodeInterpreter::VMfloatRem(jfloat op1, jfloat op2) { return fmod(op1, op2); }
36 inline jfloat BytecodeInterpreter::VMfloatNeg(jfloat op) { return -op; }
38 inline int32_t BytecodeInterpreter::VMfloatCompare(jfloat op1, jfloat op2, int32_t direction) {
39 return ( op1 < op2 ? -1 :
40 op1 > op2 ? 1 :
41 op1 == op2 ? 0 :
42 (direction == -1 || direction == 1) ? direction : 0);
44 }
46 inline void BytecodeInterpreter::VMmemCopy64(uint32_t to[2], const uint32_t from[2]) {
47 // x86 can do unaligned copies but not 64bits at a time
48 to[0] = from[0]; to[1] = from[1];
49 }
51 // The long operations depend on compiler support for "long long" on x86
53 inline jlong BytecodeInterpreter::VMlongAdd(jlong op1, jlong op2) {
54 return op1 + op2;
55 }
57 inline jlong BytecodeInterpreter::VMlongAnd(jlong op1, jlong op2) {
58 return op1 & op2;
59 }
61 inline jlong BytecodeInterpreter::VMlongDiv(jlong op1, jlong op2) {
62 // QQQ what about check and throw...
63 return op1 / op2;
64 }
66 inline jlong BytecodeInterpreter::VMlongMul(jlong op1, jlong op2) {
67 return op1 * op2;
68 }
70 inline jlong BytecodeInterpreter::VMlongOr(jlong op1, jlong op2) {
71 return op1 | op2;
72 }
74 inline jlong BytecodeInterpreter::VMlongSub(jlong op1, jlong op2) {
75 return op1 - op2;
76 }
78 inline jlong BytecodeInterpreter::VMlongXor(jlong op1, jlong op2) {
79 return op1 ^ op2;
80 }
82 inline jlong BytecodeInterpreter::VMlongRem(jlong op1, jlong op2) {
83 return op1 % op2;
84 }
86 inline jlong BytecodeInterpreter::VMlongUshr(jlong op1, jint op2) {
87 // CVM did this 0x3f mask, is the really needed??? QQQ
88 return ((unsigned long long) op1) >> (op2 & 0x3F);
89 }
91 inline jlong BytecodeInterpreter::VMlongShr(jlong op1, jint op2) {
92 return op1 >> (op2 & 0x3F);
93 }
95 inline jlong BytecodeInterpreter::VMlongShl(jlong op1, jint op2) {
96 return op1 << (op2 & 0x3F);
97 }
99 inline jlong BytecodeInterpreter::VMlongNeg(jlong op) {
100 return -op;
101 }
103 inline jlong BytecodeInterpreter::VMlongNot(jlong op) {
104 return ~op;
105 }
107 inline int32_t BytecodeInterpreter::VMlongLtz(jlong op) {
108 return (op <= 0);
109 }
111 inline int32_t BytecodeInterpreter::VMlongGez(jlong op) {
112 return (op >= 0);
113 }
115 inline int32_t BytecodeInterpreter::VMlongEqz(jlong op) {
116 return (op == 0);
117 }
119 inline int32_t BytecodeInterpreter::VMlongEq(jlong op1, jlong op2) {
120 return (op1 == op2);
121 }
123 inline int32_t BytecodeInterpreter::VMlongNe(jlong op1, jlong op2) {
124 return (op1 != op2);
125 }
127 inline int32_t BytecodeInterpreter::VMlongGe(jlong op1, jlong op2) {
128 return (op1 >= op2);
129 }
131 inline int32_t BytecodeInterpreter::VMlongLe(jlong op1, jlong op2) {
132 return (op1 <= op2);
133 }
135 inline int32_t BytecodeInterpreter::VMlongLt(jlong op1, jlong op2) {
136 return (op1 < op2);
137 }
139 inline int32_t BytecodeInterpreter::VMlongGt(jlong op1, jlong op2) {
140 return (op1 > op2);
141 }
143 inline int32_t BytecodeInterpreter::VMlongCompare(jlong op1, jlong op2) {
144 return (VMlongLt(op1, op2) ? -1 : VMlongGt(op1, op2) ? 1 : 0);
145 }
147 // Long conversions
149 inline jdouble BytecodeInterpreter::VMlong2Double(jlong val) {
150 return (jdouble) val;
151 }
153 inline jfloat BytecodeInterpreter::VMlong2Float(jlong val) {
154 return (jfloat) val;
155 }
157 inline jint BytecodeInterpreter::VMlong2Int(jlong val) {
158 return (jint) val;
159 }
161 // Double Arithmetic
163 inline jdouble BytecodeInterpreter::VMdoubleAdd(jdouble op1, jdouble op2) {
164 return op1 + op2;
165 }
167 inline jdouble BytecodeInterpreter::VMdoubleDiv(jdouble op1, jdouble op2) {
168 // Divide by zero... QQQ
169 return op1 / op2;
170 }
172 inline jdouble BytecodeInterpreter::VMdoubleMul(jdouble op1, jdouble op2) {
173 return op1 * op2;
174 }
176 inline jdouble BytecodeInterpreter::VMdoubleNeg(jdouble op) {
177 return -op;
178 }
180 inline jdouble BytecodeInterpreter::VMdoubleRem(jdouble op1, jdouble op2) {
181 return fmod(op1, op2);
182 }
184 inline jdouble BytecodeInterpreter::VMdoubleSub(jdouble op1, jdouble op2) {
185 return op1 - op2;
186 }
188 inline int32_t BytecodeInterpreter::VMdoubleCompare(jdouble op1, jdouble op2, int32_t direction) {
189 return ( op1 < op2 ? -1 :
190 op1 > op2 ? 1 :
191 op1 == op2 ? 0 :
192 (direction == -1 || direction == 1) ? direction : 0);
193 }
195 // Double Conversions
197 inline jfloat BytecodeInterpreter::VMdouble2Float(jdouble val) {
198 return (jfloat) val;
199 }
201 // Float Conversions
203 inline jdouble BytecodeInterpreter::VMfloat2Double(jfloat op) {
204 return (jdouble) op;
205 }
207 // Integer Arithmetic
209 inline jint BytecodeInterpreter::VMintAdd(jint op1, jint op2) {
210 return op1 + op2;
211 }
213 inline jint BytecodeInterpreter::VMintAnd(jint op1, jint op2) {
214 return op1 & op2;
215 }
217 inline jint BytecodeInterpreter::VMintDiv(jint op1, jint op2) {
218 /* it's possible we could catch this special case implicitly */
219 if (op1 == 0x80000000 && op2 == -1) return op1;
220 else return op1 / op2;
221 }
223 inline jint BytecodeInterpreter::VMintMul(jint op1, jint op2) {
224 return op1 * op2;
225 }
227 inline jint BytecodeInterpreter::VMintNeg(jint op) {
228 return -op;
229 }
231 inline jint BytecodeInterpreter::VMintOr(jint op1, jint op2) {
232 return op1 | op2;
233 }
235 inline jint BytecodeInterpreter::VMintRem(jint op1, jint op2) {
236 /* it's possible we could catch this special case implicitly */
237 if (op1 == 0x80000000 && op2 == -1) return 0;
238 else return op1 % op2;
239 }
241 inline jint BytecodeInterpreter::VMintShl(jint op1, jint op2) {
242 return op1 << (op2 & 0x1f);
243 }
245 inline jint BytecodeInterpreter::VMintShr(jint op1, jint op2) {
246 return op1 >> (op2 & 0x1f);
247 }
249 inline jint BytecodeInterpreter::VMintSub(jint op1, jint op2) {
250 return op1 - op2;
251 }
253 inline juint BytecodeInterpreter::VMintUshr(jint op1, jint op2) {
254 return ((juint) op1) >> (op2 & 0x1f);
255 }
257 inline jint BytecodeInterpreter::VMintXor(jint op1, jint op2) {
258 return op1 ^ op2;
259 }
261 inline jdouble BytecodeInterpreter::VMint2Double(jint val) {
262 return (jdouble) val;
263 }
265 inline jfloat BytecodeInterpreter::VMint2Float(jint val) {
266 return (jfloat) val;
267 }
269 inline jlong BytecodeInterpreter::VMint2Long(jint val) {
270 return (jlong) val;
271 }
273 inline jchar BytecodeInterpreter::VMint2Char(jint val) {
274 return (jchar) val;
275 }
277 inline jshort BytecodeInterpreter::VMint2Short(jint val) {
278 return (jshort) val;
279 }
281 inline jbyte BytecodeInterpreter::VMint2Byte(jint val) {
282 return (jbyte) val;
283 }
285 // The implementations are platform dependent. We have to worry about alignment
286 // issues on some machines which can change on the same platform depending on
287 // whether it is an LP64 machine also.
289 // We know that on LP32 mode that longs/doubles are the only thing that gives
290 // us alignment headaches. We also know that the worst we have is 32bit alignment
291 // so thing are not really too bad.
292 // (Also sparcworks compiler does the right thing for free if we don't use -arch..
293 // switches. Only gcc gives us a hard time. In LP64 mode I think we have no issue
294 // with alignment.
296 #ifdef _GNU_SOURCE
297 #define ALIGN_CONVERTER /* Needs alignment converter */
298 #else
299 #undef ALIGN_CONVERTER /* No alignment converter */
300 #endif /* _GNU_SOURCE */
302 #ifdef ALIGN_CONVERTER
303 class u8_converter {
305 private:
307 public:
308 static jdouble get_jdouble(address p) {
309 VMJavaVal64 tmp;
310 tmp.v[0] = ((uint32_t*)p)[0];
311 tmp.v[1] = ((uint32_t*)p)[1];
312 return tmp.d;
313 }
315 static void put_jdouble(address p, jdouble d) {
316 VMJavaVal64 tmp;
317 tmp.d = d;
318 ((uint32_t*)p)[0] = tmp.v[0];
319 ((uint32_t*)p)[1] = tmp.v[1];
320 }
322 static jlong get_jlong(address p) {
323 VMJavaVal64 tmp;
324 tmp.v[0] = ((uint32_t*)p)[0];
325 tmp.v[1] = ((uint32_t*)p)[1];
326 return tmp.l;
327 }
329 static void put_jlong(address p, jlong l) {
330 VMJavaVal64 tmp;
331 tmp.l = l;
332 ((uint32_t*)p)[0] = tmp.v[0];
333 ((uint32_t*)p)[1] = tmp.v[1];
334 }
335 };
336 #endif /* ALIGN_CONVERTER */
338 #endif // CPU_SPARC_VM_BYTECODEINTERPRETER_SPARC_INLINE_HPP
