Mercurial > hg > truffle
annotate src/os_cpu/bsd_x86/vm/os_bsd_x86.cpp @ 15380:10c6705dbe9a
StampTool: fix typo and change "java" to "Java"
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Thu, 24 Apr 2014 17:30:12 +0200 |
parents | 4ca6dc0799b6 |
children | 89152779163c |
rev | line source |
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3960 | 1 /* |
14909 | 2 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved. |
3960 | 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 */ | |
24 | |
25 // no precompiled headers | |
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26 #include "asm/macroAssembler.hpp" |
3960 | 27 #include "classfile/classLoader.hpp" |
28 #include "classfile/systemDictionary.hpp" | |
29 #include "classfile/vmSymbols.hpp" | |
30 #include "code/icBuffer.hpp" | |
31 #include "code/vtableStubs.hpp" | |
32 #include "interpreter/interpreter.hpp" | |
33 #include "jvm_bsd.h" | |
34 #include "memory/allocation.inline.hpp" | |
35 #include "mutex_bsd.inline.hpp" | |
36 #include "os_share_bsd.hpp" | |
37 #include "prims/jniFastGetField.hpp" | |
38 #include "prims/jvm.h" | |
39 #include "prims/jvm_misc.hpp" | |
40 #include "runtime/arguments.hpp" | |
41 #include "runtime/extendedPC.hpp" | |
42 #include "runtime/frame.inline.hpp" | |
43 #include "runtime/interfaceSupport.hpp" | |
44 #include "runtime/java.hpp" | |
45 #include "runtime/javaCalls.hpp" | |
46 #include "runtime/mutexLocker.hpp" | |
47 #include "runtime/osThread.hpp" | |
48 #include "runtime/sharedRuntime.hpp" | |
49 #include "runtime/stubRoutines.hpp" | |
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50 #include "runtime/thread.inline.hpp" |
3960 | 51 #include "runtime/timer.hpp" |
52 #include "utilities/events.hpp" | |
53 #include "utilities/vmError.hpp" | |
54 | |
55 // put OS-includes here | |
56 # include <sys/types.h> | |
57 # include <sys/mman.h> | |
58 # include <pthread.h> | |
59 # include <signal.h> | |
60 # include <errno.h> | |
61 # include <dlfcn.h> | |
62 # include <stdlib.h> | |
63 # include <stdio.h> | |
64 # include <unistd.h> | |
65 # include <sys/resource.h> | |
66 # include <pthread.h> | |
67 # include <sys/stat.h> | |
68 # include <sys/time.h> | |
69 # include <sys/utsname.h> | |
70 # include <sys/socket.h> | |
71 # include <sys/wait.h> | |
72 # include <pwd.h> | |
73 # include <poll.h> | |
74 #ifndef __OpenBSD__ | |
75 # include <ucontext.h> | |
76 #endif | |
77 | |
6918 | 78 #if !defined(__APPLE__) && !defined(__NetBSD__) |
3960 | 79 # include <pthread_np.h> |
80 #endif | |
81 | |
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82 // needed by current_stack_region() workaround for Mavericks |
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83 #if defined(__APPLE__) |
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84 # include <errno.h> |
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85 # include <sys/types.h> |
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86 # include <sys/sysctl.h> |
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87 # define DEFAULT_MAIN_THREAD_STACK_PAGES 2048 |
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88 # define OS_X_10_9_0_KERNEL_MAJOR_VERSION 13 |
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89 #endif |
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90 |
3960 | 91 #ifdef AMD64 |
92 #define SPELL_REG_SP "rsp" | |
93 #define SPELL_REG_FP "rbp" | |
94 #else | |
95 #define SPELL_REG_SP "esp" | |
96 #define SPELL_REG_FP "ebp" | |
97 #endif // AMD64 | |
98 | |
99 #ifdef __FreeBSD__ | |
100 # define context_trapno uc_mcontext.mc_trapno | |
101 # ifdef AMD64 | |
102 # define context_pc uc_mcontext.mc_rip | |
103 # define context_sp uc_mcontext.mc_rsp | |
104 # define context_fp uc_mcontext.mc_rbp | |
105 # define context_rip uc_mcontext.mc_rip | |
106 # define context_rsp uc_mcontext.mc_rsp | |
107 # define context_rbp uc_mcontext.mc_rbp | |
108 # define context_rax uc_mcontext.mc_rax | |
109 # define context_rbx uc_mcontext.mc_rbx | |
110 # define context_rcx uc_mcontext.mc_rcx | |
111 # define context_rdx uc_mcontext.mc_rdx | |
112 # define context_rsi uc_mcontext.mc_rsi | |
113 # define context_rdi uc_mcontext.mc_rdi | |
114 # define context_r8 uc_mcontext.mc_r8 | |
115 # define context_r9 uc_mcontext.mc_r9 | |
116 # define context_r10 uc_mcontext.mc_r10 | |
117 # define context_r11 uc_mcontext.mc_r11 | |
118 # define context_r12 uc_mcontext.mc_r12 | |
119 # define context_r13 uc_mcontext.mc_r13 | |
120 # define context_r14 uc_mcontext.mc_r14 | |
121 # define context_r15 uc_mcontext.mc_r15 | |
122 # define context_flags uc_mcontext.mc_flags | |
123 # define context_err uc_mcontext.mc_err | |
124 # else | |
125 # define context_pc uc_mcontext.mc_eip | |
126 # define context_sp uc_mcontext.mc_esp | |
127 # define context_fp uc_mcontext.mc_ebp | |
128 # define context_eip uc_mcontext.mc_eip | |
129 # define context_esp uc_mcontext.mc_esp | |
130 # define context_eax uc_mcontext.mc_eax | |
131 # define context_ebx uc_mcontext.mc_ebx | |
132 # define context_ecx uc_mcontext.mc_ecx | |
133 # define context_edx uc_mcontext.mc_edx | |
134 # define context_ebp uc_mcontext.mc_ebp | |
135 # define context_esi uc_mcontext.mc_esi | |
136 # define context_edi uc_mcontext.mc_edi | |
137 # define context_eflags uc_mcontext.mc_eflags | |
138 # define context_trapno uc_mcontext.mc_trapno | |
139 # endif | |
140 #endif | |
141 | |
142 #ifdef __APPLE__ | |
143 # if __DARWIN_UNIX03 && (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5) | |
144 // 10.5 UNIX03 member name prefixes | |
145 #define DU3_PREFIX(s, m) __ ## s.__ ## m | |
146 # else | |
147 #define DU3_PREFIX(s, m) s ## . ## m | |
148 # endif | |
149 | |
150 # ifdef AMD64 | |
151 # define context_pc context_rip | |
152 # define context_sp context_rsp | |
153 # define context_fp context_rbp | |
154 # define context_rip uc_mcontext->DU3_PREFIX(ss,rip) | |
155 # define context_rsp uc_mcontext->DU3_PREFIX(ss,rsp) | |
156 # define context_rax uc_mcontext->DU3_PREFIX(ss,rax) | |
157 # define context_rbx uc_mcontext->DU3_PREFIX(ss,rbx) | |
158 # define context_rcx uc_mcontext->DU3_PREFIX(ss,rcx) | |
159 # define context_rdx uc_mcontext->DU3_PREFIX(ss,rdx) | |
160 # define context_rbp uc_mcontext->DU3_PREFIX(ss,rbp) | |
161 # define context_rsi uc_mcontext->DU3_PREFIX(ss,rsi) | |
162 # define context_rdi uc_mcontext->DU3_PREFIX(ss,rdi) | |
163 # define context_r8 uc_mcontext->DU3_PREFIX(ss,r8) | |
164 # define context_r9 uc_mcontext->DU3_PREFIX(ss,r9) | |
165 # define context_r10 uc_mcontext->DU3_PREFIX(ss,r10) | |
166 # define context_r11 uc_mcontext->DU3_PREFIX(ss,r11) | |
167 # define context_r12 uc_mcontext->DU3_PREFIX(ss,r12) | |
168 # define context_r13 uc_mcontext->DU3_PREFIX(ss,r13) | |
169 # define context_r14 uc_mcontext->DU3_PREFIX(ss,r14) | |
170 # define context_r15 uc_mcontext->DU3_PREFIX(ss,r15) | |
171 # define context_flags uc_mcontext->DU3_PREFIX(ss,rflags) | |
172 # define context_trapno uc_mcontext->DU3_PREFIX(es,trapno) | |
173 # define context_err uc_mcontext->DU3_PREFIX(es,err) | |
174 # else | |
175 # define context_pc context_eip | |
176 # define context_sp context_esp | |
177 # define context_fp context_ebp | |
178 # define context_eip uc_mcontext->DU3_PREFIX(ss,eip) | |
179 # define context_esp uc_mcontext->DU3_PREFIX(ss,esp) | |
180 # define context_eax uc_mcontext->DU3_PREFIX(ss,eax) | |
181 # define context_ebx uc_mcontext->DU3_PREFIX(ss,ebx) | |
182 # define context_ecx uc_mcontext->DU3_PREFIX(ss,ecx) | |
183 # define context_edx uc_mcontext->DU3_PREFIX(ss,edx) | |
184 # define context_ebp uc_mcontext->DU3_PREFIX(ss,ebp) | |
185 # define context_esi uc_mcontext->DU3_PREFIX(ss,esi) | |
186 # define context_edi uc_mcontext->DU3_PREFIX(ss,edi) | |
187 # define context_eflags uc_mcontext->DU3_PREFIX(ss,eflags) | |
188 # define context_trapno uc_mcontext->DU3_PREFIX(es,trapno) | |
189 # endif | |
190 #endif | |
191 | |
192 #ifdef __OpenBSD__ | |
193 # define context_trapno sc_trapno | |
194 # ifdef AMD64 | |
195 # define context_pc sc_rip | |
196 # define context_sp sc_rsp | |
197 # define context_fp sc_rbp | |
198 # define context_rip sc_rip | |
199 # define context_rsp sc_rsp | |
200 # define context_rbp sc_rbp | |
201 # define context_rax sc_rax | |
202 # define context_rbx sc_rbx | |
203 # define context_rcx sc_rcx | |
204 # define context_rdx sc_rdx | |
205 # define context_rsi sc_rsi | |
206 # define context_rdi sc_rdi | |
207 # define context_r8 sc_r8 | |
208 # define context_r9 sc_r9 | |
209 # define context_r10 sc_r10 | |
210 # define context_r11 sc_r11 | |
211 # define context_r12 sc_r12 | |
212 # define context_r13 sc_r13 | |
213 # define context_r14 sc_r14 | |
214 # define context_r15 sc_r15 | |
215 # define context_flags sc_rflags | |
216 # define context_err sc_err | |
217 # else | |
218 # define context_pc sc_eip | |
219 # define context_sp sc_esp | |
220 # define context_fp sc_ebp | |
221 # define context_eip sc_eip | |
222 # define context_esp sc_esp | |
223 # define context_eax sc_eax | |
224 # define context_ebx sc_ebx | |
225 # define context_ecx sc_ecx | |
226 # define context_edx sc_edx | |
227 # define context_ebp sc_ebp | |
228 # define context_esi sc_esi | |
229 # define context_edi sc_edi | |
230 # define context_eflags sc_eflags | |
231 # define context_trapno sc_trapno | |
232 # endif | |
233 #endif | |
234 | |
235 #ifdef __NetBSD__ | |
236 # define context_trapno uc_mcontext.__gregs[_REG_TRAPNO] | |
237 # ifdef AMD64 | |
238 # define __register_t __greg_t | |
239 # define context_pc uc_mcontext.__gregs[_REG_RIP] | |
240 # define context_sp uc_mcontext.__gregs[_REG_URSP] | |
241 # define context_fp uc_mcontext.__gregs[_REG_RBP] | |
242 # define context_rip uc_mcontext.__gregs[_REG_RIP] | |
243 # define context_rsp uc_mcontext.__gregs[_REG_URSP] | |
244 # define context_rax uc_mcontext.__gregs[_REG_RAX] | |
245 # define context_rbx uc_mcontext.__gregs[_REG_RBX] | |
246 # define context_rcx uc_mcontext.__gregs[_REG_RCX] | |
247 # define context_rdx uc_mcontext.__gregs[_REG_RDX] | |
248 # define context_rbp uc_mcontext.__gregs[_REG_RBP] | |
249 # define context_rsi uc_mcontext.__gregs[_REG_RSI] | |
250 # define context_rdi uc_mcontext.__gregs[_REG_RDI] | |
251 # define context_r8 uc_mcontext.__gregs[_REG_R8] | |
252 # define context_r9 uc_mcontext.__gregs[_REG_R9] | |
253 # define context_r10 uc_mcontext.__gregs[_REG_R10] | |
254 # define context_r11 uc_mcontext.__gregs[_REG_R11] | |
255 # define context_r12 uc_mcontext.__gregs[_REG_R12] | |
256 # define context_r13 uc_mcontext.__gregs[_REG_R13] | |
257 # define context_r14 uc_mcontext.__gregs[_REG_R14] | |
258 # define context_r15 uc_mcontext.__gregs[_REG_R15] | |
259 # define context_flags uc_mcontext.__gregs[_REG_RFL] | |
260 # define context_err uc_mcontext.__gregs[_REG_ERR] | |
261 # else | |
262 # define context_pc uc_mcontext.__gregs[_REG_EIP] | |
263 # define context_sp uc_mcontext.__gregs[_REG_UESP] | |
264 # define context_fp uc_mcontext.__gregs[_REG_EBP] | |
265 # define context_eip uc_mcontext.__gregs[_REG_EIP] | |
266 # define context_esp uc_mcontext.__gregs[_REG_UESP] | |
267 # define context_eax uc_mcontext.__gregs[_REG_EAX] | |
268 # define context_ebx uc_mcontext.__gregs[_REG_EBX] | |
269 # define context_ecx uc_mcontext.__gregs[_REG_ECX] | |
270 # define context_edx uc_mcontext.__gregs[_REG_EDX] | |
271 # define context_ebp uc_mcontext.__gregs[_REG_EBP] | |
272 # define context_esi uc_mcontext.__gregs[_REG_ESI] | |
273 # define context_edi uc_mcontext.__gregs[_REG_EDI] | |
274 # define context_eflags uc_mcontext.__gregs[_REG_EFL] | |
275 # define context_trapno uc_mcontext.__gregs[_REG_TRAPNO] | |
276 # endif | |
277 #endif | |
278 | |
279 address os::current_stack_pointer() { | |
4006 | 280 #if defined(__clang__) || defined(__llvm__) |
281 register void *esp; | |
282 __asm__("mov %%"SPELL_REG_SP", %0":"=r"(esp)); | |
283 return (address) esp; | |
284 #elif defined(SPARC_WORKS) | |
3960 | 285 register void *esp; |
286 __asm__("mov %%"SPELL_REG_SP", %0":"=r"(esp)); | |
287 return (address) ((char*)esp + sizeof(long)*2); | |
288 #else | |
289 register void *esp __asm__ (SPELL_REG_SP); | |
290 return (address) esp; | |
291 #endif | |
292 } | |
293 | |
294 char* os::non_memory_address_word() { | |
295 // Must never look like an address returned by reserve_memory, | |
296 // even in its subfields (as defined by the CPU immediate fields, | |
297 // if the CPU splits constants across multiple instructions). | |
298 | |
299 return (char*) -1; | |
300 } | |
301 | |
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302 void os::initialize_thread(Thread* thr) { |
3960 | 303 // Nothing to do. |
304 } | |
305 | |
306 address os::Bsd::ucontext_get_pc(ucontext_t * uc) { | |
307 return (address)uc->context_pc; | |
308 } | |
309 | |
310 intptr_t* os::Bsd::ucontext_get_sp(ucontext_t * uc) { | |
311 return (intptr_t*)uc->context_sp; | |
312 } | |
313 | |
314 intptr_t* os::Bsd::ucontext_get_fp(ucontext_t * uc) { | |
315 return (intptr_t*)uc->context_fp; | |
316 } | |
317 | |
318 // For Forte Analyzer AsyncGetCallTrace profiling support - thread | |
319 // is currently interrupted by SIGPROF. | |
320 // os::Solaris::fetch_frame_from_ucontext() tries to skip nested signal | |
321 // frames. Currently we don't do that on Bsd, so it's the same as | |
322 // os::fetch_frame_from_context(). | |
323 ExtendedPC os::Bsd::fetch_frame_from_ucontext(Thread* thread, | |
324 ucontext_t* uc, intptr_t** ret_sp, intptr_t** ret_fp) { | |
325 | |
326 assert(thread != NULL, "just checking"); | |
327 assert(ret_sp != NULL, "just checking"); | |
328 assert(ret_fp != NULL, "just checking"); | |
329 | |
330 return os::fetch_frame_from_context(uc, ret_sp, ret_fp); | |
331 } | |
332 | |
333 ExtendedPC os::fetch_frame_from_context(void* ucVoid, | |
334 intptr_t** ret_sp, intptr_t** ret_fp) { | |
335 | |
336 ExtendedPC epc; | |
337 ucontext_t* uc = (ucontext_t*)ucVoid; | |
338 | |
339 if (uc != NULL) { | |
340 epc = ExtendedPC(os::Bsd::ucontext_get_pc(uc)); | |
341 if (ret_sp) *ret_sp = os::Bsd::ucontext_get_sp(uc); | |
342 if (ret_fp) *ret_fp = os::Bsd::ucontext_get_fp(uc); | |
343 } else { | |
344 // construct empty ExtendedPC for return value checking | |
345 epc = ExtendedPC(NULL); | |
346 if (ret_sp) *ret_sp = (intptr_t *)NULL; | |
347 if (ret_fp) *ret_fp = (intptr_t *)NULL; | |
348 } | |
349 | |
350 return epc; | |
351 } | |
352 | |
353 frame os::fetch_frame_from_context(void* ucVoid) { | |
354 intptr_t* sp; | |
355 intptr_t* fp; | |
356 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp); | |
357 return frame(sp, fp, epc.pc()); | |
358 } | |
359 | |
360 // By default, gcc always save frame pointer (%ebp/%rbp) on stack. It may get | |
361 // turned off by -fomit-frame-pointer, | |
362 frame os::get_sender_for_C_frame(frame* fr) { | |
363 return frame(fr->sender_sp(), fr->link(), fr->sender_pc()); | |
364 } | |
365 | |
366 intptr_t* _get_previous_fp() { | |
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367 #if defined(SPARC_WORKS) || defined(__clang__) || defined(__llvm__) |
3960 | 368 register intptr_t **ebp; |
369 __asm__("mov %%"SPELL_REG_FP", %0":"=r"(ebp)); | |
370 #else | |
371 register intptr_t **ebp __asm__ (SPELL_REG_FP); | |
372 #endif | |
373 return (intptr_t*) *ebp; // we want what it points to. | |
374 } | |
375 | |
376 | |
377 frame os::current_frame() { | |
378 intptr_t* fp = _get_previous_fp(); | |
379 frame myframe((intptr_t*)os::current_stack_pointer(), | |
380 (intptr_t*)fp, | |
381 CAST_FROM_FN_PTR(address, os::current_frame)); | |
382 if (os::is_first_C_frame(&myframe)) { | |
383 // stack is not walkable | |
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384 return frame(); |
3960 | 385 } else { |
386 return os::get_sender_for_C_frame(&myframe); | |
387 } | |
388 } | |
389 | |
390 // Utility functions | |
391 | |
392 // From IA32 System Programming Guide | |
393 enum { | |
394 trap_page_fault = 0xE | |
395 }; | |
396 | |
397 extern "C" JNIEXPORT int | |
398 JVM_handle_bsd_signal(int sig, | |
399 siginfo_t* info, | |
400 void* ucVoid, | |
401 int abort_if_unrecognized) { | |
402 ucontext_t* uc = (ucontext_t*) ucVoid; | |
403 | |
404 Thread* t = ThreadLocalStorage::get_thread_slow(); | |
405 | |
11151 | 406 // Must do this before SignalHandlerMark, if crash protection installed we will longjmp away |
407 // (no destructors can be run) | |
408 os::WatcherThreadCrashProtection::check_crash_protection(sig, t); | |
409 | |
3960 | 410 SignalHandlerMark shm(t); |
411 | |
412 // Note: it's not uncommon that JNI code uses signal/sigset to install | |
413 // then restore certain signal handler (e.g. to temporarily block SIGPIPE, | |
414 // or have a SIGILL handler when detecting CPU type). When that happens, | |
415 // JVM_handle_bsd_signal() might be invoked with junk info/ucVoid. To | |
416 // avoid unnecessary crash when libjsig is not preloaded, try handle signals | |
417 // that do not require siginfo/ucontext first. | |
418 | |
419 if (sig == SIGPIPE || sig == SIGXFSZ) { | |
420 // allow chained handler to go first | |
421 if (os::Bsd::chained_handler(sig, info, ucVoid)) { | |
422 return true; | |
423 } else { | |
424 if (PrintMiscellaneous && (WizardMode || Verbose)) { | |
425 char buf[64]; | |
426 warning("Ignoring %s - see bugs 4229104 or 646499219", | |
427 os::exception_name(sig, buf, sizeof(buf))); | |
428 } | |
429 return true; | |
430 } | |
431 } | |
432 | |
433 JavaThread* thread = NULL; | |
434 VMThread* vmthread = NULL; | |
435 if (os::Bsd::signal_handlers_are_installed) { | |
436 if (t != NULL ){ | |
437 if(t->is_Java_thread()) { | |
438 thread = (JavaThread*)t; | |
439 } | |
440 else if(t->is_VM_thread()){ | |
441 vmthread = (VMThread *)t; | |
442 } | |
443 } | |
444 } | |
445 /* | |
446 NOTE: does not seem to work on bsd. | |
447 if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) { | |
448 // can't decode this kind of signal | |
449 info = NULL; | |
450 } else { | |
451 assert(sig == info->si_signo, "bad siginfo"); | |
452 } | |
453 */ | |
454 // decide if this trap can be handled by a stub | |
455 address stub = NULL; | |
456 | |
457 address pc = NULL; | |
458 | |
459 //%note os_trap_1 | |
460 if (info != NULL && uc != NULL && thread != NULL) { | |
461 pc = (address) os::Bsd::ucontext_get_pc(uc); | |
462 | |
11127 | 463 if (StubRoutines::is_safefetch_fault(pc)) { |
464 uc->context_pc = intptr_t(StubRoutines::continuation_for_safefetch_fault(pc)); | |
465 return 1; | |
3960 | 466 } |
467 | |
468 // Handle ALL stack overflow variations here | |
469 if (sig == SIGSEGV || sig == SIGBUS) { | |
470 address addr = (address) info->si_addr; | |
471 | |
472 // check if fault address is within thread stack | |
473 if (addr < thread->stack_base() && | |
474 addr >= thread->stack_base() - thread->stack_size()) { | |
475 // stack overflow | |
476 if (thread->in_stack_yellow_zone(addr)) { | |
477 thread->disable_stack_yellow_zone(); | |
478 if (thread->thread_state() == _thread_in_Java) { | |
479 // Throw a stack overflow exception. Guard pages will be reenabled | |
480 // while unwinding the stack. | |
481 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW); | |
482 } else { | |
483 // Thread was in the vm or native code. Return and try to finish. | |
484 return 1; | |
485 } | |
486 } else if (thread->in_stack_red_zone(addr)) { | |
487 // Fatal red zone violation. Disable the guard pages and fall through | |
488 // to handle_unexpected_exception way down below. | |
489 thread->disable_stack_red_zone(); | |
490 tty->print_raw_cr("An irrecoverable stack overflow has occurred."); | |
491 } | |
492 } | |
493 } | |
494 | |
6184 | 495 // We test if stub is already set (by the stack overflow code |
496 // above) so it is not overwritten by the code that follows. This | |
497 // check is not required on other platforms, because on other | |
498 // platforms we check for SIGSEGV only or SIGBUS only, where here | |
499 // we have to check for both SIGSEGV and SIGBUS. | |
500 if (thread->thread_state() == _thread_in_Java && stub == NULL) { | |
3960 | 501 // Java thread running in Java code => find exception handler if any |
502 // a fault inside compiled code, the interpreter, or a stub | |
503 | |
504 if ((sig == SIGSEGV || sig == SIGBUS) && os::is_poll_address((address)info->si_addr)) { | |
505 stub = SharedRuntime::get_poll_stub(pc); | |
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506 #if defined(__APPLE__) |
3960 | 507 // 32-bit Darwin reports a SIGBUS for nearly all memory access exceptions. |
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508 // 64-bit Darwin may also use a SIGBUS (seen with compressed oops). |
3960 | 509 // Catching SIGBUS here prevents the implicit SIGBUS NULL check below from |
510 // being called, so only do so if the implicit NULL check is not necessary. | |
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511 } else if (sig == SIGBUS && MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) { |
3960 | 512 #else |
513 } else if (sig == SIGBUS /* && info->si_code == BUS_OBJERR */) { | |
514 #endif | |
515 // BugId 4454115: A read from a MappedByteBuffer can fault | |
516 // here if the underlying file has been truncated. | |
517 // Do not crash the VM in such a case. | |
518 CodeBlob* cb = CodeCache::find_blob_unsafe(pc); | |
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519 nmethod* nm = (cb != NULL && cb->is_nmethod()) ? (nmethod*)cb : NULL; |
3960 | 520 if (nm != NULL && nm->has_unsafe_access()) { |
521 stub = StubRoutines::handler_for_unsafe_access(); | |
522 } | |
523 } | |
524 else | |
525 | |
526 #ifdef AMD64 | |
527 if (sig == SIGFPE && | |
528 (info->si_code == FPE_INTDIV || info->si_code == FPE_FLTDIV)) { | |
529 stub = | |
530 SharedRuntime:: | |
531 continuation_for_implicit_exception(thread, | |
532 pc, | |
533 SharedRuntime:: | |
534 IMPLICIT_DIVIDE_BY_ZERO); | |
535 #ifdef __APPLE__ | |
536 } else if (sig == SIGFPE && info->si_code == FPE_NOOP) { | |
537 int op = pc[0]; | |
538 | |
539 // Skip REX | |
540 if ((pc[0] & 0xf0) == 0x40) { | |
541 op = pc[1]; | |
542 } else { | |
543 op = pc[0]; | |
544 } | |
545 | |
546 // Check for IDIV | |
547 if (op == 0xF7) { | |
548 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime:: IMPLICIT_DIVIDE_BY_ZERO); | |
549 } else { | |
550 // TODO: handle more cases if we are using other x86 instructions | |
551 // that can generate SIGFPE signal. | |
552 tty->print_cr("unknown opcode 0x%X with SIGFPE.", op); | |
553 fatal("please update this code."); | |
554 } | |
555 #endif /* __APPLE__ */ | |
556 | |
557 #else | |
558 if (sig == SIGFPE /* && info->si_code == FPE_INTDIV */) { | |
559 // HACK: si_code does not work on bsd 2.2.12-20!!! | |
560 int op = pc[0]; | |
561 if (op == 0xDB) { | |
562 // FIST | |
563 // TODO: The encoding of D2I in i486.ad can cause an exception | |
564 // prior to the fist instruction if there was an invalid operation | |
565 // pending. We want to dismiss that exception. From the win_32 | |
566 // side it also seems that if it really was the fist causing | |
567 // the exception that we do the d2i by hand with different | |
568 // rounding. Seems kind of weird. | |
569 // NOTE: that we take the exception at the NEXT floating point instruction. | |
570 assert(pc[0] == 0xDB, "not a FIST opcode"); | |
571 assert(pc[1] == 0x14, "not a FIST opcode"); | |
572 assert(pc[2] == 0x24, "not a FIST opcode"); | |
573 return true; | |
574 } else if (op == 0xF7) { | |
575 // IDIV | |
576 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); | |
577 } else { | |
578 // TODO: handle more cases if we are using other x86 instructions | |
579 // that can generate SIGFPE signal on bsd. | |
580 tty->print_cr("unknown opcode 0x%X with SIGFPE.", op); | |
581 fatal("please update this code."); | |
582 } | |
583 #endif // AMD64 | |
584 } else if ((sig == SIGSEGV || sig == SIGBUS) && | |
585 !MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) { | |
586 // Determination of interpreter/vtable stub/compiled code null exception | |
587 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); | |
588 } | |
589 } else if (thread->thread_state() == _thread_in_vm && | |
590 sig == SIGBUS && /* info->si_code == BUS_OBJERR && */ | |
591 thread->doing_unsafe_access()) { | |
592 stub = StubRoutines::handler_for_unsafe_access(); | |
593 } | |
594 | |
595 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in | |
596 // and the heap gets shrunk before the field access. | |
597 if ((sig == SIGSEGV) || (sig == SIGBUS)) { | |
598 address addr = JNI_FastGetField::find_slowcase_pc(pc); | |
599 if (addr != (address)-1) { | |
600 stub = addr; | |
601 } | |
602 } | |
603 | |
604 // Check to see if we caught the safepoint code in the | |
605 // process of write protecting the memory serialization page. | |
606 // It write enables the page immediately after protecting it | |
607 // so we can just return to retry the write. | |
608 if ((sig == SIGSEGV || sig == SIGBUS) && | |
609 os::is_memory_serialize_page(thread, (address) info->si_addr)) { | |
610 // Block current thread until the memory serialize page permission restored. | |
611 os::block_on_serialize_page_trap(); | |
612 return true; | |
613 } | |
614 } | |
615 | |
616 #ifndef AMD64 | |
617 // Execution protection violation | |
618 // | |
619 // This should be kept as the last step in the triage. We don't | |
620 // have a dedicated trap number for a no-execute fault, so be | |
621 // conservative and allow other handlers the first shot. | |
622 // | |
623 // Note: We don't test that info->si_code == SEGV_ACCERR here. | |
624 // this si_code is so generic that it is almost meaningless; and | |
625 // the si_code for this condition may change in the future. | |
626 // Furthermore, a false-positive should be harmless. | |
627 if (UnguardOnExecutionViolation > 0 && | |
628 (sig == SIGSEGV || sig == SIGBUS) && | |
629 uc->context_trapno == trap_page_fault) { | |
630 int page_size = os::vm_page_size(); | |
631 address addr = (address) info->si_addr; | |
632 address pc = os::Bsd::ucontext_get_pc(uc); | |
633 // Make sure the pc and the faulting address are sane. | |
634 // | |
635 // If an instruction spans a page boundary, and the page containing | |
636 // the beginning of the instruction is executable but the following | |
637 // page is not, the pc and the faulting address might be slightly | |
638 // different - we still want to unguard the 2nd page in this case. | |
639 // | |
640 // 15 bytes seems to be a (very) safe value for max instruction size. | |
641 bool pc_is_near_addr = | |
642 (pointer_delta((void*) addr, (void*) pc, sizeof(char)) < 15); | |
643 bool instr_spans_page_boundary = | |
644 (align_size_down((intptr_t) pc ^ (intptr_t) addr, | |
645 (intptr_t) page_size) > 0); | |
646 | |
647 if (pc == addr || (pc_is_near_addr && instr_spans_page_boundary)) { | |
648 static volatile address last_addr = | |
649 (address) os::non_memory_address_word(); | |
650 | |
651 // In conservative mode, don't unguard unless the address is in the VM | |
652 if (addr != last_addr && | |
653 (UnguardOnExecutionViolation > 1 || os::address_is_in_vm(addr))) { | |
654 | |
655 // Set memory to RWX and retry | |
656 address page_start = | |
657 (address) align_size_down((intptr_t) addr, (intptr_t) page_size); | |
658 bool res = os::protect_memory((char*) page_start, page_size, | |
659 os::MEM_PROT_RWX); | |
660 | |
661 if (PrintMiscellaneous && Verbose) { | |
662 char buf[256]; | |
663 jio_snprintf(buf, sizeof(buf), "Execution protection violation " | |
664 "at " INTPTR_FORMAT | |
665 ", unguarding " INTPTR_FORMAT ": %s, errno=%d", addr, | |
666 page_start, (res ? "success" : "failed"), errno); | |
667 tty->print_raw_cr(buf); | |
668 } | |
669 stub = pc; | |
670 | |
671 // Set last_addr so if we fault again at the same address, we don't end | |
672 // up in an endless loop. | |
673 // | |
674 // There are two potential complications here. Two threads trapping at | |
675 // the same address at the same time could cause one of the threads to | |
676 // think it already unguarded, and abort the VM. Likely very rare. | |
677 // | |
678 // The other race involves two threads alternately trapping at | |
679 // different addresses and failing to unguard the page, resulting in | |
680 // an endless loop. This condition is probably even more unlikely than | |
681 // the first. | |
682 // | |
683 // Although both cases could be avoided by using locks or thread local | |
684 // last_addr, these solutions are unnecessary complication: this | |
685 // handler is a best-effort safety net, not a complete solution. It is | |
686 // disabled by default and should only be used as a workaround in case | |
687 // we missed any no-execute-unsafe VM code. | |
688 | |
689 last_addr = addr; | |
690 } | |
691 } | |
692 } | |
693 #endif // !AMD64 | |
694 | |
695 if (stub != NULL) { | |
696 // save all thread context in case we need to restore it | |
697 if (thread != NULL) thread->set_saved_exception_pc(pc); | |
698 | |
699 uc->context_pc = (intptr_t)stub; | |
700 return true; | |
701 } | |
702 | |
703 // signal-chaining | |
704 if (os::Bsd::chained_handler(sig, info, ucVoid)) { | |
705 return true; | |
706 } | |
707 | |
708 if (!abort_if_unrecognized) { | |
709 // caller wants another chance, so give it to him | |
710 return false; | |
711 } | |
712 | |
713 if (pc == NULL && uc != NULL) { | |
714 pc = os::Bsd::ucontext_get_pc(uc); | |
715 } | |
716 | |
717 // unmask current signal | |
718 sigset_t newset; | |
719 sigemptyset(&newset); | |
720 sigaddset(&newset, sig); | |
721 sigprocmask(SIG_UNBLOCK, &newset, NULL); | |
722 | |
723 VMError err(t, sig, pc, info, ucVoid); | |
724 err.report_and_die(); | |
725 | |
726 ShouldNotReachHere(); | |
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727 return false; |
3960 | 728 } |
729 | |
730 // From solaris_i486.s ported to bsd_i486.s | |
731 extern "C" void fixcw(); | |
732 | |
733 void os::Bsd::init_thread_fpu_state(void) { | |
734 #ifndef AMD64 | |
735 // Set fpu to 53 bit precision. This happens too early to use a stub. | |
736 fixcw(); | |
737 #endif // !AMD64 | |
738 } | |
739 | |
740 | |
741 // Check that the bsd kernel version is 2.4 or higher since earlier | |
742 // versions do not support SSE without patches. | |
743 bool os::supports_sse() { | |
744 return true; | |
745 } | |
746 | |
747 bool os::is_allocatable(size_t bytes) { | |
748 #ifdef AMD64 | |
749 // unused on amd64? | |
750 return true; | |
751 #else | |
752 | |
753 if (bytes < 2 * G) { | |
754 return true; | |
755 } | |
756 | |
757 char* addr = reserve_memory(bytes, NULL); | |
758 | |
759 if (addr != NULL) { | |
760 release_memory(addr, bytes); | |
761 } | |
762 | |
763 return addr != NULL; | |
764 #endif // AMD64 | |
765 } | |
766 | |
767 //////////////////////////////////////////////////////////////////////////////// | |
768 // thread stack | |
769 | |
770 #ifdef AMD64 | |
771 size_t os::Bsd::min_stack_allowed = 64 * K; | |
772 | |
773 // amd64: pthread on amd64 is always in floating stack mode | |
774 bool os::Bsd::supports_variable_stack_size() { return true; } | |
775 #else | |
776 size_t os::Bsd::min_stack_allowed = (48 DEBUG_ONLY(+4))*K; | |
777 | |
778 #ifdef __GNUC__ | |
779 #define GET_GS() ({int gs; __asm__ volatile("movw %%gs, %w0":"=q"(gs)); gs&0xffff;}) | |
780 #endif | |
781 | |
782 bool os::Bsd::supports_variable_stack_size() { return true; } | |
783 #endif // AMD64 | |
784 | |
785 // return default stack size for thr_type | |
786 size_t os::Bsd::default_stack_size(os::ThreadType thr_type) { | |
787 // default stack size (compiler thread needs larger stack) | |
788 #ifdef AMD64 | |
789 size_t s = (thr_type == os::compiler_thread ? 4 * M : 1 * M); | |
790 #else | |
791 size_t s = (thr_type == os::compiler_thread ? 2 * M : 512 * K); | |
792 #endif // AMD64 | |
793 return s; | |
794 } | |
795 | |
796 size_t os::Bsd::default_guard_size(os::ThreadType thr_type) { | |
797 // Creating guard page is very expensive. Java thread has HotSpot | |
798 // guard page, only enable glibc guard page for non-Java threads. | |
799 return (thr_type == java_thread ? 0 : page_size()); | |
800 } | |
801 | |
802 // Java thread: | |
803 // | |
804 // Low memory addresses | |
805 // +------------------------+ | |
806 // | |\ JavaThread created by VM does not have glibc | |
807 // | glibc guard page | - guard, attached Java thread usually has | |
808 // | |/ 1 page glibc guard. | |
809 // P1 +------------------------+ Thread::stack_base() - Thread::stack_size() | |
810 // | |\ | |
811 // | HotSpot Guard Pages | - red and yellow pages | |
812 // | |/ | |
813 // +------------------------+ JavaThread::stack_yellow_zone_base() | |
814 // | |\ | |
815 // | Normal Stack | - | |
816 // | |/ | |
817 // P2 +------------------------+ Thread::stack_base() | |
818 // | |
819 // Non-Java thread: | |
820 // | |
821 // Low memory addresses | |
822 // +------------------------+ | |
823 // | |\ | |
824 // | glibc guard page | - usually 1 page | |
825 // | |/ | |
826 // P1 +------------------------+ Thread::stack_base() - Thread::stack_size() | |
827 // | |\ | |
828 // | Normal Stack | - | |
829 // | |/ | |
830 // P2 +------------------------+ Thread::stack_base() | |
831 // | |
832 // ** P1 (aka bottom) and size ( P2 = P1 - size) are the address and stack size returned from | |
833 // pthread_attr_getstack() | |
834 | |
835 static void current_stack_region(address * bottom, size_t * size) { | |
836 #ifdef __APPLE__ | |
837 pthread_t self = pthread_self(); | |
838 void *stacktop = pthread_get_stackaddr_np(self); | |
839 *size = pthread_get_stacksize_np(self); | |
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840 // workaround for OS X 10.9.0 (Mavericks) |
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841 // pthread_get_stacksize_np returns 128 pages even though the actual size is 2048 pages |
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842 if (pthread_main_np() == 1) { |
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843 if ((*size) < (DEFAULT_MAIN_THREAD_STACK_PAGES * (size_t)getpagesize())) { |
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844 char kern_osrelease[256]; |
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845 size_t kern_osrelease_size = sizeof(kern_osrelease); |
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846 int ret = sysctlbyname("kern.osrelease", kern_osrelease, &kern_osrelease_size, NULL, 0); |
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847 if (ret == 0) { |
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848 // get the major number, atoi will ignore the minor amd micro portions of the version string |
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849 if (atoi(kern_osrelease) >= OS_X_10_9_0_KERNEL_MAJOR_VERSION) { |
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850 *size = (DEFAULT_MAIN_THREAD_STACK_PAGES*getpagesize()); |
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851 } |
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852 } |
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853 } |
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854 } |
3960 | 855 *bottom = (address) stacktop - *size; |
856 #elif defined(__OpenBSD__) | |
857 stack_t ss; | |
858 int rslt = pthread_stackseg_np(pthread_self(), &ss); | |
859 | |
860 if (rslt != 0) | |
861 fatal(err_msg("pthread_stackseg_np failed with err = %d", rslt)); | |
862 | |
863 *bottom = (address)((char *)ss.ss_sp - ss.ss_size); | |
864 *size = ss.ss_size; | |
6918 | 865 #else |
3960 | 866 pthread_attr_t attr; |
867 | |
868 int rslt = pthread_attr_init(&attr); | |
869 | |
870 // JVM needs to know exact stack location, abort if it fails | |
871 if (rslt != 0) | |
872 fatal(err_msg("pthread_attr_init failed with err = %d", rslt)); | |
873 | |
874 rslt = pthread_attr_get_np(pthread_self(), &attr); | |
875 | |
876 if (rslt != 0) | |
877 fatal(err_msg("pthread_attr_get_np failed with err = %d", rslt)); | |
878 | |
879 if (pthread_attr_getstackaddr(&attr, (void **)bottom) != 0 || | |
880 pthread_attr_getstacksize(&attr, size) != 0) { | |
881 fatal("Can not locate current stack attributes!"); | |
882 } | |
883 | |
884 pthread_attr_destroy(&attr); | |
885 #endif | |
886 assert(os::current_stack_pointer() >= *bottom && | |
887 os::current_stack_pointer() < *bottom + *size, "just checking"); | |
888 } | |
889 | |
890 address os::current_stack_base() { | |
891 address bottom; | |
892 size_t size; | |
893 current_stack_region(&bottom, &size); | |
894 return (bottom + size); | |
895 } | |
896 | |
897 size_t os::current_stack_size() { | |
898 // stack size includes normal stack and HotSpot guard pages | |
899 address bottom; | |
900 size_t size; | |
901 current_stack_region(&bottom, &size); | |
902 return size; | |
903 } | |
904 | |
905 ///////////////////////////////////////////////////////////////////////////// | |
906 // helper functions for fatal error handler | |
907 | |
908 void os::print_context(outputStream *st, void *context) { | |
909 if (context == NULL) return; | |
910 | |
911 ucontext_t *uc = (ucontext_t*)context; | |
912 st->print_cr("Registers:"); | |
913 #ifdef AMD64 | |
914 st->print( "RAX=" INTPTR_FORMAT, uc->context_rax); | |
915 st->print(", RBX=" INTPTR_FORMAT, uc->context_rbx); | |
916 st->print(", RCX=" INTPTR_FORMAT, uc->context_rcx); | |
917 st->print(", RDX=" INTPTR_FORMAT, uc->context_rdx); | |
918 st->cr(); | |
919 st->print( "RSP=" INTPTR_FORMAT, uc->context_rsp); | |
920 st->print(", RBP=" INTPTR_FORMAT, uc->context_rbp); | |
921 st->print(", RSI=" INTPTR_FORMAT, uc->context_rsi); | |
922 st->print(", RDI=" INTPTR_FORMAT, uc->context_rdi); | |
923 st->cr(); | |
924 st->print( "R8 =" INTPTR_FORMAT, uc->context_r8); | |
925 st->print(", R9 =" INTPTR_FORMAT, uc->context_r9); | |
926 st->print(", R10=" INTPTR_FORMAT, uc->context_r10); | |
927 st->print(", R11=" INTPTR_FORMAT, uc->context_r11); | |
928 st->cr(); | |
929 st->print( "R12=" INTPTR_FORMAT, uc->context_r12); | |
930 st->print(", R13=" INTPTR_FORMAT, uc->context_r13); | |
931 st->print(", R14=" INTPTR_FORMAT, uc->context_r14); | |
932 st->print(", R15=" INTPTR_FORMAT, uc->context_r15); | |
933 st->cr(); | |
934 st->print( "RIP=" INTPTR_FORMAT, uc->context_rip); | |
935 st->print(", EFLAGS=" INTPTR_FORMAT, uc->context_flags); | |
936 st->print(", ERR=" INTPTR_FORMAT, uc->context_err); | |
937 st->cr(); | |
938 st->print(" TRAPNO=" INTPTR_FORMAT, uc->context_trapno); | |
939 #else | |
940 st->print( "EAX=" INTPTR_FORMAT, uc->context_eax); | |
941 st->print(", EBX=" INTPTR_FORMAT, uc->context_ebx); | |
942 st->print(", ECX=" INTPTR_FORMAT, uc->context_ecx); | |
943 st->print(", EDX=" INTPTR_FORMAT, uc->context_edx); | |
944 st->cr(); | |
945 st->print( "ESP=" INTPTR_FORMAT, uc->context_esp); | |
946 st->print(", EBP=" INTPTR_FORMAT, uc->context_ebp); | |
947 st->print(", ESI=" INTPTR_FORMAT, uc->context_esi); | |
948 st->print(", EDI=" INTPTR_FORMAT, uc->context_edi); | |
949 st->cr(); | |
950 st->print( "EIP=" INTPTR_FORMAT, uc->context_eip); | |
951 st->print(", EFLAGS=" INTPTR_FORMAT, uc->context_eflags); | |
952 #endif // AMD64 | |
953 st->cr(); | |
954 st->cr(); | |
955 | |
956 intptr_t *sp = (intptr_t *)os::Bsd::ucontext_get_sp(uc); | |
957 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp); | |
958 print_hex_dump(st, (address)sp, (address)(sp + 8*sizeof(intptr_t)), sizeof(intptr_t)); | |
959 st->cr(); | |
960 | |
961 // Note: it may be unsafe to inspect memory near pc. For example, pc may | |
962 // point to garbage if entry point in an nmethod is corrupted. Leave | |
963 // this at the end, and hope for the best. | |
964 address pc = os::Bsd::ucontext_get_pc(uc); | |
965 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc); | |
966 print_hex_dump(st, pc - 32, pc + 32, sizeof(char)); | |
967 } | |
968 | |
969 void os::print_register_info(outputStream *st, void *context) { | |
970 if (context == NULL) return; | |
971 | |
972 ucontext_t *uc = (ucontext_t*)context; | |
973 | |
974 st->print_cr("Register to memory mapping:"); | |
975 st->cr(); | |
976 | |
977 // this is horrendously verbose but the layout of the registers in the | |
978 // context does not match how we defined our abstract Register set, so | |
979 // we can't just iterate through the gregs area | |
980 | |
981 // this is only for the "general purpose" registers | |
982 | |
983 #ifdef AMD64 | |
984 st->print("RAX="); print_location(st, uc->context_rax); | |
985 st->print("RBX="); print_location(st, uc->context_rbx); | |
986 st->print("RCX="); print_location(st, uc->context_rcx); | |
987 st->print("RDX="); print_location(st, uc->context_rdx); | |
988 st->print("RSP="); print_location(st, uc->context_rsp); | |
989 st->print("RBP="); print_location(st, uc->context_rbp); | |
990 st->print("RSI="); print_location(st, uc->context_rsi); | |
991 st->print("RDI="); print_location(st, uc->context_rdi); | |
992 st->print("R8 ="); print_location(st, uc->context_r8); | |
993 st->print("R9 ="); print_location(st, uc->context_r9); | |
994 st->print("R10="); print_location(st, uc->context_r10); | |
995 st->print("R11="); print_location(st, uc->context_r11); | |
996 st->print("R12="); print_location(st, uc->context_r12); | |
997 st->print("R13="); print_location(st, uc->context_r13); | |
998 st->print("R14="); print_location(st, uc->context_r14); | |
999 st->print("R15="); print_location(st, uc->context_r15); | |
1000 #else | |
1001 st->print("EAX="); print_location(st, uc->context_eax); | |
1002 st->print("EBX="); print_location(st, uc->context_ebx); | |
1003 st->print("ECX="); print_location(st, uc->context_ecx); | |
1004 st->print("EDX="); print_location(st, uc->context_edx); | |
1005 st->print("ESP="); print_location(st, uc->context_esp); | |
1006 st->print("EBP="); print_location(st, uc->context_ebp); | |
1007 st->print("ESI="); print_location(st, uc->context_esi); | |
1008 st->print("EDI="); print_location(st, uc->context_edi); | |
1009 #endif // AMD64 | |
1010 | |
1011 st->cr(); | |
1012 } | |
1013 | |
1014 void os::setup_fpu() { | |
1015 #ifndef AMD64 | |
1016 address fpu_cntrl = StubRoutines::addr_fpu_cntrl_wrd_std(); | |
1017 __asm__ volatile ( "fldcw (%0)" : | |
1018 : "r" (fpu_cntrl) : "memory"); | |
1019 #endif // !AMD64 | |
1020 } | |
5903
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1021 |
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1022 #ifndef PRODUCT |
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1023 void os::verify_stack_alignment() { |
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1024 } |
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1025 #endif |