Mercurial > jdk8-mips64-public > hotspot / file revision
src/cpu/x86/vm/jniFastGetField_x86_32.cpp@bb1da64b0492
src/cpu/x86/vm/jniFastGetField_x86_32.cpp
Fri, 16 Aug 2019 16:50:17 +0200
- author
- eosterlund
- date
- Fri, 16 Aug 2019 16:50:17 +0200
- changeset 9834
- bb1da64b0492
- parent 9669
- 32bc598624bd
- child 9703
- 2fdf635bcf28
- permissions
- -rw-r--r--
8229345: Memory leak due to vtable stubs not being shared on SPARC
Reviewed-by: mdoerr, dholmes, kvn
1 /*
2 * Copyright (c) 2004, 2017, 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 #include "precompiled.hpp"
26 #include "asm/macroAssembler.hpp"
27 #include "memory/resourceArea.hpp"
28 #include "prims/jniFastGetField.hpp"
29 #include "prims/jvm_misc.hpp"
30 #include "runtime/safepoint.hpp"
32 #define __ masm->
34 #define BUFFER_SIZE 30
36 #ifdef _WINDOWS
37 GetBooleanField_t JNI_FastGetField::jni_fast_GetBooleanField_fp;
38 GetByteField_t JNI_FastGetField::jni_fast_GetByteField_fp;
39 GetCharField_t JNI_FastGetField::jni_fast_GetCharField_fp;
40 GetShortField_t JNI_FastGetField::jni_fast_GetShortField_fp;
41 GetIntField_t JNI_FastGetField::jni_fast_GetIntField_fp;
42 GetLongField_t JNI_FastGetField::jni_fast_GetLongField_fp;
43 GetFloatField_t JNI_FastGetField::jni_fast_GetFloatField_fp;
44 GetDoubleField_t JNI_FastGetField::jni_fast_GetDoubleField_fp;
45 #endif
47 // Instead of issuing lfence for LoadLoad barrier, we create data dependency
48 // between loads, which is much more efficient than lfence.
50 address JNI_FastGetField::generate_fast_get_int_field0(BasicType type) {
51 const char *name = NULL;
52 switch (type) {
53 case T_BOOLEAN: name = "jni_fast_GetBooleanField"; break;
54 case T_BYTE: name = "jni_fast_GetByteField"; break;
55 case T_CHAR: name = "jni_fast_GetCharField"; break;
56 case T_SHORT: name = "jni_fast_GetShortField"; break;
57 case T_INT: name = "jni_fast_GetIntField"; break;
58 default: ShouldNotReachHere();
59 }
60 ResourceMark rm;
61 BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE*wordSize);
62 CodeBuffer cbuf(blob);
63 MacroAssembler* masm = new MacroAssembler(&cbuf);
64 address fast_entry = __ pc();
66 Label slow;
68 // stack layout: offset from rsp (in words):
69 // return pc 0
70 // jni env 1
71 // obj 2
72 // jfieldID 3
74 ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
75 __ mov32 (rcx, counter);
76 __ testb (rcx, 1);
77 __ jcc (Assembler::notZero, slow);
78 if (os::is_MP()) {
79 __ mov(rax, rcx);
80 __ andptr(rax, 1); // rax, must end up 0
81 __ movptr(rdx, Address(rsp, rax, Address::times_1, 2*wordSize));
82 // obj, notice rax, is 0.
83 // rdx is data dependent on rcx.
84 } else {
85 __ movptr (rdx, Address(rsp, 2*wordSize)); // obj
86 }
87 __ movptr(rax, Address(rsp, 3*wordSize)); // jfieldID
89 __ clear_jweak_tag(rdx);
91 __ movptr(rdx, Address(rdx, 0)); // *obj
92 __ shrptr (rax, 2); // offset
94 assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
95 speculative_load_pclist[count] = __ pc();
96 switch (type) {
97 case T_BOOLEAN: __ movzbl (rax, Address(rdx, rax, Address::times_1)); break;
98 case T_BYTE: __ movsbl (rax, Address(rdx, rax, Address::times_1)); break;
99 case T_CHAR: __ movzwl (rax, Address(rdx, rax, Address::times_1)); break;
100 case T_SHORT: __ movswl (rax, Address(rdx, rax, Address::times_1)); break;
101 case T_INT: __ movl (rax, Address(rdx, rax, Address::times_1)); break;
102 default: ShouldNotReachHere();
103 }
105 Address ca1;
106 if (os::is_MP()) {
107 __ lea(rdx, counter);
108 __ xorptr(rdx, rax);
109 __ xorptr(rdx, rax);
110 __ cmp32(rcx, Address(rdx, 0));
111 // ca1 is the same as ca because
112 // rax, ^ counter_addr ^ rax, = address
113 // ca1 is data dependent on rax,.
114 } else {
115 __ cmp32(rcx, counter);
116 }
117 __ jcc (Assembler::notEqual, slow);
119 #ifndef _WINDOWS
120 __ ret (0);
121 #else
122 // __stdcall calling convention
123 __ ret (3*wordSize);
124 #endif
126 slowcase_entry_pclist[count++] = __ pc();
127 __ bind (slow);
128 address slow_case_addr = NULL;
129 switch (type) {
130 case T_BOOLEAN: slow_case_addr = jni_GetBooleanField_addr(); break;
131 case T_BYTE: slow_case_addr = jni_GetByteField_addr(); break;
132 case T_CHAR: slow_case_addr = jni_GetCharField_addr(); break;
133 case T_SHORT: slow_case_addr = jni_GetShortField_addr(); break;
134 case T_INT: slow_case_addr = jni_GetIntField_addr();
135 }
136 // tail call
137 __ jump (ExternalAddress(slow_case_addr));
139 __ flush ();
141 #ifndef _WINDOWS
142 return fast_entry;
143 #else
144 switch (type) {
145 case T_BOOLEAN: jni_fast_GetBooleanField_fp = (GetBooleanField_t) fast_entry; break;
146 case T_BYTE: jni_fast_GetByteField_fp = (GetByteField_t) fast_entry; break;
147 case T_CHAR: jni_fast_GetCharField_fp = (GetCharField_t) fast_entry; break;
148 case T_SHORT: jni_fast_GetShortField_fp = (GetShortField_t) fast_entry; break;
149 case T_INT: jni_fast_GetIntField_fp = (GetIntField_t) fast_entry; break;
150 }
151 return os::win32::fast_jni_accessor_wrapper(type);
152 #endif
153 }
155 address JNI_FastGetField::generate_fast_get_boolean_field() {
156 return generate_fast_get_int_field0(T_BOOLEAN);
157 }
159 address JNI_FastGetField::generate_fast_get_byte_field() {
160 return generate_fast_get_int_field0(T_BYTE);
161 }
163 address JNI_FastGetField::generate_fast_get_char_field() {
164 return generate_fast_get_int_field0(T_CHAR);
165 }
167 address JNI_FastGetField::generate_fast_get_short_field() {
168 return generate_fast_get_int_field0(T_SHORT);
169 }
171 address JNI_FastGetField::generate_fast_get_int_field() {
172 return generate_fast_get_int_field0(T_INT);
173 }
175 address JNI_FastGetField::generate_fast_get_long_field() {
176 const char *name = "jni_fast_GetLongField";
177 ResourceMark rm;
178 BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE*wordSize);
179 CodeBuffer cbuf(blob);
180 MacroAssembler* masm = new MacroAssembler(&cbuf);
181 address fast_entry = __ pc();
183 Label slow;
185 // stack layout: offset from rsp (in words):
186 // old rsi 0
187 // return pc 1
188 // jni env 2
189 // obj 3
190 // jfieldID 4
192 ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
194 __ push (rsi);
195 __ mov32 (rcx, counter);
196 __ testb (rcx, 1);
197 __ jcc (Assembler::notZero, slow);
198 if (os::is_MP()) {
199 __ mov(rax, rcx);
200 __ andptr(rax, 1); // rax, must end up 0
201 __ movptr(rdx, Address(rsp, rax, Address::times_1, 3*wordSize));
202 // obj, notice rax, is 0.
203 // rdx is data dependent on rcx.
204 } else {
205 __ movptr(rdx, Address(rsp, 3*wordSize)); // obj
206 }
207 __ movptr(rsi, Address(rsp, 4*wordSize)); // jfieldID
209 __ clear_jweak_tag(rdx);
211 __ movptr(rdx, Address(rdx, 0)); // *obj
212 __ shrptr(rsi, 2); // offset
214 assert(count < LIST_CAPACITY-1, "LIST_CAPACITY too small");
215 speculative_load_pclist[count++] = __ pc();
216 __ movptr(rax, Address(rdx, rsi, Address::times_1));
217 #ifndef _LP64
218 speculative_load_pclist[count] = __ pc();
219 __ movl(rdx, Address(rdx, rsi, Address::times_1, 4));
220 #endif // _LP64
222 if (os::is_MP()) {
223 __ lea(rsi, counter);
224 __ xorptr(rsi, rdx);
225 __ xorptr(rsi, rax);
226 __ xorptr(rsi, rdx);
227 __ xorptr(rsi, rax);
228 __ cmp32(rcx, Address(rsi, 0));
229 // ca1 is the same as ca because
230 // rax, ^ rdx ^ counter_addr ^ rax, ^ rdx = address
231 // ca1 is data dependent on both rax, and rdx.
232 } else {
233 __ cmp32(rcx, counter);
234 }
235 __ jcc (Assembler::notEqual, slow);
237 __ pop (rsi);
239 #ifndef _WINDOWS
240 __ ret (0);
241 #else
242 // __stdcall calling convention
243 __ ret (3*wordSize);
244 #endif
246 slowcase_entry_pclist[count-1] = __ pc();
247 slowcase_entry_pclist[count++] = __ pc();
248 __ bind (slow);
249 __ pop (rsi);
250 address slow_case_addr = jni_GetLongField_addr();;
251 // tail call
252 __ jump (ExternalAddress(slow_case_addr));
254 __ flush ();
256 #ifndef _WINDOWS
257 return fast_entry;
258 #else
259 jni_fast_GetLongField_fp = (GetLongField_t) fast_entry;
260 return os::win32::fast_jni_accessor_wrapper(T_LONG);
261 #endif
262 }
264 address JNI_FastGetField::generate_fast_get_float_field0(BasicType type) {
265 const char *name = NULL;
266 switch (type) {
267 case T_FLOAT: name = "jni_fast_GetFloatField"; break;
268 case T_DOUBLE: name = "jni_fast_GetDoubleField"; break;
269 default: ShouldNotReachHere();
270 }
271 ResourceMark rm;
272 BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE*wordSize);
273 CodeBuffer cbuf(blob);
274 MacroAssembler* masm = new MacroAssembler(&cbuf);
275 address fast_entry = __ pc();
277 Label slow_with_pop, slow;
279 // stack layout: offset from rsp (in words):
280 // return pc 0
281 // jni env 1
282 // obj 2
283 // jfieldID 3
285 ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
287 __ mov32 (rcx, counter);
288 __ testb (rcx, 1);
289 __ jcc (Assembler::notZero, slow);
290 if (os::is_MP()) {
291 __ mov(rax, rcx);
292 __ andptr(rax, 1); // rax, must end up 0
293 __ movptr(rdx, Address(rsp, rax, Address::times_1, 2*wordSize));
294 // obj, notice rax, is 0.
295 // rdx is data dependent on rcx.
296 } else {
297 __ movptr(rdx, Address(rsp, 2*wordSize)); // obj
298 }
299 __ movptr(rax, Address(rsp, 3*wordSize)); // jfieldID
301 __ clear_jweak_tag(rdx);
303 __ movptr(rdx, Address(rdx, 0)); // *obj
304 __ shrptr(rax, 2); // offset
306 assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
307 speculative_load_pclist[count] = __ pc();
308 switch (type) {
309 #ifndef _LP64
310 case T_FLOAT: __ fld_s (Address(rdx, rax, Address::times_1)); break;
311 case T_DOUBLE: __ fld_d (Address(rdx, rax, Address::times_1)); break;
312 #else
313 case T_FLOAT: __ movflt (xmm0, Address(robj, roffset, Address::times_1)); break;
314 case T_DOUBLE: __ movdbl (xmm0, Address(robj, roffset, Address::times_1)); break;
315 #endif // _LP64
316 default: ShouldNotReachHere();
317 }
319 Address ca1;
320 if (os::is_MP()) {
321 __ fst_s (Address(rsp, -4));
322 __ lea(rdx, counter);
323 __ movl (rax, Address(rsp, -4));
324 // garbage hi-order bits on 64bit are harmless.
325 __ xorptr(rdx, rax);
326 __ xorptr(rdx, rax);
327 __ cmp32(rcx, Address(rdx, 0));
328 // rax, ^ counter_addr ^ rax, = address
329 // ca1 is data dependent on the field
330 // access.
331 } else {
332 __ cmp32(rcx, counter);
333 }
334 __ jcc (Assembler::notEqual, slow_with_pop);
336 #ifndef _WINDOWS
337 __ ret (0);
338 #else
339 // __stdcall calling convention
340 __ ret (3*wordSize);
341 #endif
343 __ bind (slow_with_pop);
344 // invalid load. pop FPU stack.
345 __ fstp_d (0);
347 slowcase_entry_pclist[count++] = __ pc();
348 __ bind (slow);
349 address slow_case_addr = NULL;
350 switch (type) {
351 case T_FLOAT: slow_case_addr = jni_GetFloatField_addr(); break;
352 case T_DOUBLE: slow_case_addr = jni_GetDoubleField_addr(); break;
353 default: ShouldNotReachHere();
354 }
355 // tail call
356 __ jump (ExternalAddress(slow_case_addr));
358 __ flush ();
360 #ifndef _WINDOWS
361 return fast_entry;
362 #else
363 switch (type) {
364 case T_FLOAT: jni_fast_GetFloatField_fp = (GetFloatField_t) fast_entry; break;
365 case T_DOUBLE: jni_fast_GetDoubleField_fp = (GetDoubleField_t) fast_entry; break;
366 }
367 return os::win32::fast_jni_accessor_wrapper(type);
368 #endif
369 }
371 address JNI_FastGetField::generate_fast_get_float_field() {
372 return generate_fast_get_float_field0(T_FLOAT);
373 }
375 address JNI_FastGetField::generate_fast_get_double_field() {
376 return generate_fast_get_float_field0(T_DOUBLE);
377 }
