Mercurial > hg > graal-jvmci-8
comparison src/os_cpu/bsd_x86/vm/os_bsd_x86.cpp @ 3960:f08d439fab8c
7089790: integrate bsd-port changes
Reviewed-by: kvn, twisti, jrose
Contributed-by: Kurt Miller <kurt@intricatesoftware.com>, Greg Lewis <glewis@eyesbeyond.com>, Jung-uk Kim <jkim@freebsd.org>, Christos Zoulas <christos@zoulas.com>, Landon Fuller <landonf@plausible.coop>, The FreeBSD Foundation <board@freebsdfoundation.org>, Michael Franz <mvfranz@gmail.com>, Roger Hoover <rhoover@apple.com>, Alexander Strange <astrange@apple.com>
author | never |
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date | Sun, 25 Sep 2011 16:03:29 -0700 |
parents | |
children | 436b4a3231bf |
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1 /* | |
2 * Copyright (c) 1999, 2011, 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 */ | |
24 | |
25 // no precompiled headers | |
26 #include "assembler_x86.inline.hpp" | |
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 "nativeInst_x86.hpp" | |
37 #include "os_share_bsd.hpp" | |
38 #include "prims/jniFastGetField.hpp" | |
39 #include "prims/jvm.h" | |
40 #include "prims/jvm_misc.hpp" | |
41 #include "runtime/arguments.hpp" | |
42 #include "runtime/extendedPC.hpp" | |
43 #include "runtime/frame.inline.hpp" | |
44 #include "runtime/interfaceSupport.hpp" | |
45 #include "runtime/java.hpp" | |
46 #include "runtime/javaCalls.hpp" | |
47 #include "runtime/mutexLocker.hpp" | |
48 #include "runtime/osThread.hpp" | |
49 #include "runtime/sharedRuntime.hpp" | |
50 #include "runtime/stubRoutines.hpp" | |
51 #include "runtime/timer.hpp" | |
52 #include "thread_bsd.inline.hpp" | |
53 #include "utilities/events.hpp" | |
54 #include "utilities/vmError.hpp" | |
55 #ifdef COMPILER1 | |
56 #include "c1/c1_Runtime1.hpp" | |
57 #endif | |
58 #ifdef COMPILER2 | |
59 #include "opto/runtime.hpp" | |
60 #endif | |
61 | |
62 // put OS-includes here | |
63 # include <sys/types.h> | |
64 # include <sys/mman.h> | |
65 # include <pthread.h> | |
66 # include <signal.h> | |
67 # include <errno.h> | |
68 # include <dlfcn.h> | |
69 # include <stdlib.h> | |
70 # include <stdio.h> | |
71 # include <unistd.h> | |
72 # include <sys/resource.h> | |
73 # include <pthread.h> | |
74 # include <sys/stat.h> | |
75 # include <sys/time.h> | |
76 # include <sys/utsname.h> | |
77 # include <sys/socket.h> | |
78 # include <sys/wait.h> | |
79 # include <pwd.h> | |
80 # include <poll.h> | |
81 #ifndef __OpenBSD__ | |
82 # include <ucontext.h> | |
83 #endif | |
84 | |
85 #if defined(_ALLBSD_SOURCE) && !defined(__APPLE__) && !defined(__NetBSD__) | |
86 # include <pthread_np.h> | |
87 #endif | |
88 | |
89 #ifdef AMD64 | |
90 #define SPELL_REG_SP "rsp" | |
91 #define SPELL_REG_FP "rbp" | |
92 #else | |
93 #define SPELL_REG_SP "esp" | |
94 #define SPELL_REG_FP "ebp" | |
95 #endif // AMD64 | |
96 | |
97 #ifdef __FreeBSD__ | |
98 # define context_trapno uc_mcontext.mc_trapno | |
99 # ifdef AMD64 | |
100 # define context_pc uc_mcontext.mc_rip | |
101 # define context_sp uc_mcontext.mc_rsp | |
102 # define context_fp uc_mcontext.mc_rbp | |
103 # define context_rip uc_mcontext.mc_rip | |
104 # define context_rsp uc_mcontext.mc_rsp | |
105 # define context_rbp uc_mcontext.mc_rbp | |
106 # define context_rax uc_mcontext.mc_rax | |
107 # define context_rbx uc_mcontext.mc_rbx | |
108 # define context_rcx uc_mcontext.mc_rcx | |
109 # define context_rdx uc_mcontext.mc_rdx | |
110 # define context_rsi uc_mcontext.mc_rsi | |
111 # define context_rdi uc_mcontext.mc_rdi | |
112 # define context_r8 uc_mcontext.mc_r8 | |
113 # define context_r9 uc_mcontext.mc_r9 | |
114 # define context_r10 uc_mcontext.mc_r10 | |
115 # define context_r11 uc_mcontext.mc_r11 | |
116 # define context_r12 uc_mcontext.mc_r12 | |
117 # define context_r13 uc_mcontext.mc_r13 | |
118 # define context_r14 uc_mcontext.mc_r14 | |
119 # define context_r15 uc_mcontext.mc_r15 | |
120 # define context_flags uc_mcontext.mc_flags | |
121 # define context_err uc_mcontext.mc_err | |
122 # else | |
123 # define context_pc uc_mcontext.mc_eip | |
124 # define context_sp uc_mcontext.mc_esp | |
125 # define context_fp uc_mcontext.mc_ebp | |
126 # define context_eip uc_mcontext.mc_eip | |
127 # define context_esp uc_mcontext.mc_esp | |
128 # define context_eax uc_mcontext.mc_eax | |
129 # define context_ebx uc_mcontext.mc_ebx | |
130 # define context_ecx uc_mcontext.mc_ecx | |
131 # define context_edx uc_mcontext.mc_edx | |
132 # define context_ebp uc_mcontext.mc_ebp | |
133 # define context_esi uc_mcontext.mc_esi | |
134 # define context_edi uc_mcontext.mc_edi | |
135 # define context_eflags uc_mcontext.mc_eflags | |
136 # define context_trapno uc_mcontext.mc_trapno | |
137 # endif | |
138 #endif | |
139 | |
140 #ifdef __APPLE__ | |
141 # if __DARWIN_UNIX03 && (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5) | |
142 // 10.5 UNIX03 member name prefixes | |
143 #define DU3_PREFIX(s, m) __ ## s.__ ## m | |
144 # else | |
145 #define DU3_PREFIX(s, m) s ## . ## m | |
146 # endif | |
147 | |
148 # ifdef AMD64 | |
149 # define context_pc context_rip | |
150 # define context_sp context_rsp | |
151 # define context_fp context_rbp | |
152 # define context_rip uc_mcontext->DU3_PREFIX(ss,rip) | |
153 # define context_rsp uc_mcontext->DU3_PREFIX(ss,rsp) | |
154 # define context_rax uc_mcontext->DU3_PREFIX(ss,rax) | |
155 # define context_rbx uc_mcontext->DU3_PREFIX(ss,rbx) | |
156 # define context_rcx uc_mcontext->DU3_PREFIX(ss,rcx) | |
157 # define context_rdx uc_mcontext->DU3_PREFIX(ss,rdx) | |
158 # define context_rbp uc_mcontext->DU3_PREFIX(ss,rbp) | |
159 # define context_rsi uc_mcontext->DU3_PREFIX(ss,rsi) | |
160 # define context_rdi uc_mcontext->DU3_PREFIX(ss,rdi) | |
161 # define context_r8 uc_mcontext->DU3_PREFIX(ss,r8) | |
162 # define context_r9 uc_mcontext->DU3_PREFIX(ss,r9) | |
163 # define context_r10 uc_mcontext->DU3_PREFIX(ss,r10) | |
164 # define context_r11 uc_mcontext->DU3_PREFIX(ss,r11) | |
165 # define context_r12 uc_mcontext->DU3_PREFIX(ss,r12) | |
166 # define context_r13 uc_mcontext->DU3_PREFIX(ss,r13) | |
167 # define context_r14 uc_mcontext->DU3_PREFIX(ss,r14) | |
168 # define context_r15 uc_mcontext->DU3_PREFIX(ss,r15) | |
169 # define context_flags uc_mcontext->DU3_PREFIX(ss,rflags) | |
170 # define context_trapno uc_mcontext->DU3_PREFIX(es,trapno) | |
171 # define context_err uc_mcontext->DU3_PREFIX(es,err) | |
172 # else | |
173 # define context_pc context_eip | |
174 # define context_sp context_esp | |
175 # define context_fp context_ebp | |
176 # define context_eip uc_mcontext->DU3_PREFIX(ss,eip) | |
177 # define context_esp uc_mcontext->DU3_PREFIX(ss,esp) | |
178 # define context_eax uc_mcontext->DU3_PREFIX(ss,eax) | |
179 # define context_ebx uc_mcontext->DU3_PREFIX(ss,ebx) | |
180 # define context_ecx uc_mcontext->DU3_PREFIX(ss,ecx) | |
181 # define context_edx uc_mcontext->DU3_PREFIX(ss,edx) | |
182 # define context_ebp uc_mcontext->DU3_PREFIX(ss,ebp) | |
183 # define context_esi uc_mcontext->DU3_PREFIX(ss,esi) | |
184 # define context_edi uc_mcontext->DU3_PREFIX(ss,edi) | |
185 # define context_eflags uc_mcontext->DU3_PREFIX(ss,eflags) | |
186 # define context_trapno uc_mcontext->DU3_PREFIX(es,trapno) | |
187 # endif | |
188 #endif | |
189 | |
190 #ifdef __OpenBSD__ | |
191 # define context_trapno sc_trapno | |
192 # ifdef AMD64 | |
193 # define context_pc sc_rip | |
194 # define context_sp sc_rsp | |
195 # define context_fp sc_rbp | |
196 # define context_rip sc_rip | |
197 # define context_rsp sc_rsp | |
198 # define context_rbp sc_rbp | |
199 # define context_rax sc_rax | |
200 # define context_rbx sc_rbx | |
201 # define context_rcx sc_rcx | |
202 # define context_rdx sc_rdx | |
203 # define context_rsi sc_rsi | |
204 # define context_rdi sc_rdi | |
205 # define context_r8 sc_r8 | |
206 # define context_r9 sc_r9 | |
207 # define context_r10 sc_r10 | |
208 # define context_r11 sc_r11 | |
209 # define context_r12 sc_r12 | |
210 # define context_r13 sc_r13 | |
211 # define context_r14 sc_r14 | |
212 # define context_r15 sc_r15 | |
213 # define context_flags sc_rflags | |
214 # define context_err sc_err | |
215 # else | |
216 # define context_pc sc_eip | |
217 # define context_sp sc_esp | |
218 # define context_fp sc_ebp | |
219 # define context_eip sc_eip | |
220 # define context_esp sc_esp | |
221 # define context_eax sc_eax | |
222 # define context_ebx sc_ebx | |
223 # define context_ecx sc_ecx | |
224 # define context_edx sc_edx | |
225 # define context_ebp sc_ebp | |
226 # define context_esi sc_esi | |
227 # define context_edi sc_edi | |
228 # define context_eflags sc_eflags | |
229 # define context_trapno sc_trapno | |
230 # endif | |
231 #endif | |
232 | |
233 #ifdef __NetBSD__ | |
234 # define context_trapno uc_mcontext.__gregs[_REG_TRAPNO] | |
235 # ifdef AMD64 | |
236 # define __register_t __greg_t | |
237 # define context_pc uc_mcontext.__gregs[_REG_RIP] | |
238 # define context_sp uc_mcontext.__gregs[_REG_URSP] | |
239 # define context_fp uc_mcontext.__gregs[_REG_RBP] | |
240 # define context_rip uc_mcontext.__gregs[_REG_RIP] | |
241 # define context_rsp uc_mcontext.__gregs[_REG_URSP] | |
242 # define context_rax uc_mcontext.__gregs[_REG_RAX] | |
243 # define context_rbx uc_mcontext.__gregs[_REG_RBX] | |
244 # define context_rcx uc_mcontext.__gregs[_REG_RCX] | |
245 # define context_rdx uc_mcontext.__gregs[_REG_RDX] | |
246 # define context_rbp uc_mcontext.__gregs[_REG_RBP] | |
247 # define context_rsi uc_mcontext.__gregs[_REG_RSI] | |
248 # define context_rdi uc_mcontext.__gregs[_REG_RDI] | |
249 # define context_r8 uc_mcontext.__gregs[_REG_R8] | |
250 # define context_r9 uc_mcontext.__gregs[_REG_R9] | |
251 # define context_r10 uc_mcontext.__gregs[_REG_R10] | |
252 # define context_r11 uc_mcontext.__gregs[_REG_R11] | |
253 # define context_r12 uc_mcontext.__gregs[_REG_R12] | |
254 # define context_r13 uc_mcontext.__gregs[_REG_R13] | |
255 # define context_r14 uc_mcontext.__gregs[_REG_R14] | |
256 # define context_r15 uc_mcontext.__gregs[_REG_R15] | |
257 # define context_flags uc_mcontext.__gregs[_REG_RFL] | |
258 # define context_err uc_mcontext.__gregs[_REG_ERR] | |
259 # else | |
260 # define context_pc uc_mcontext.__gregs[_REG_EIP] | |
261 # define context_sp uc_mcontext.__gregs[_REG_UESP] | |
262 # define context_fp uc_mcontext.__gregs[_REG_EBP] | |
263 # define context_eip uc_mcontext.__gregs[_REG_EIP] | |
264 # define context_esp uc_mcontext.__gregs[_REG_UESP] | |
265 # define context_eax uc_mcontext.__gregs[_REG_EAX] | |
266 # define context_ebx uc_mcontext.__gregs[_REG_EBX] | |
267 # define context_ecx uc_mcontext.__gregs[_REG_ECX] | |
268 # define context_edx uc_mcontext.__gregs[_REG_EDX] | |
269 # define context_ebp uc_mcontext.__gregs[_REG_EBP] | |
270 # define context_esi uc_mcontext.__gregs[_REG_ESI] | |
271 # define context_edi uc_mcontext.__gregs[_REG_EDI] | |
272 # define context_eflags uc_mcontext.__gregs[_REG_EFL] | |
273 # define context_trapno uc_mcontext.__gregs[_REG_TRAPNO] | |
274 # endif | |
275 #endif | |
276 | |
277 address os::current_stack_pointer() { | |
278 #ifdef SPARC_WORKS | |
279 register void *esp; | |
280 __asm__("mov %%"SPELL_REG_SP", %0":"=r"(esp)); | |
281 return (address) ((char*)esp + sizeof(long)*2); | |
282 #else | |
283 register void *esp __asm__ (SPELL_REG_SP); | |
284 return (address) esp; | |
285 #endif | |
286 } | |
287 | |
288 char* os::non_memory_address_word() { | |
289 // Must never look like an address returned by reserve_memory, | |
290 // even in its subfields (as defined by the CPU immediate fields, | |
291 // if the CPU splits constants across multiple instructions). | |
292 | |
293 return (char*) -1; | |
294 } | |
295 | |
296 void os::initialize_thread() { | |
297 // Nothing to do. | |
298 } | |
299 | |
300 address os::Bsd::ucontext_get_pc(ucontext_t * uc) { | |
301 return (address)uc->context_pc; | |
302 } | |
303 | |
304 intptr_t* os::Bsd::ucontext_get_sp(ucontext_t * uc) { | |
305 return (intptr_t*)uc->context_sp; | |
306 } | |
307 | |
308 intptr_t* os::Bsd::ucontext_get_fp(ucontext_t * uc) { | |
309 return (intptr_t*)uc->context_fp; | |
310 } | |
311 | |
312 // For Forte Analyzer AsyncGetCallTrace profiling support - thread | |
313 // is currently interrupted by SIGPROF. | |
314 // os::Solaris::fetch_frame_from_ucontext() tries to skip nested signal | |
315 // frames. Currently we don't do that on Bsd, so it's the same as | |
316 // os::fetch_frame_from_context(). | |
317 ExtendedPC os::Bsd::fetch_frame_from_ucontext(Thread* thread, | |
318 ucontext_t* uc, intptr_t** ret_sp, intptr_t** ret_fp) { | |
319 | |
320 assert(thread != NULL, "just checking"); | |
321 assert(ret_sp != NULL, "just checking"); | |
322 assert(ret_fp != NULL, "just checking"); | |
323 | |
324 return os::fetch_frame_from_context(uc, ret_sp, ret_fp); | |
325 } | |
326 | |
327 ExtendedPC os::fetch_frame_from_context(void* ucVoid, | |
328 intptr_t** ret_sp, intptr_t** ret_fp) { | |
329 | |
330 ExtendedPC epc; | |
331 ucontext_t* uc = (ucontext_t*)ucVoid; | |
332 | |
333 if (uc != NULL) { | |
334 epc = ExtendedPC(os::Bsd::ucontext_get_pc(uc)); | |
335 if (ret_sp) *ret_sp = os::Bsd::ucontext_get_sp(uc); | |
336 if (ret_fp) *ret_fp = os::Bsd::ucontext_get_fp(uc); | |
337 } else { | |
338 // construct empty ExtendedPC for return value checking | |
339 epc = ExtendedPC(NULL); | |
340 if (ret_sp) *ret_sp = (intptr_t *)NULL; | |
341 if (ret_fp) *ret_fp = (intptr_t *)NULL; | |
342 } | |
343 | |
344 return epc; | |
345 } | |
346 | |
347 frame os::fetch_frame_from_context(void* ucVoid) { | |
348 intptr_t* sp; | |
349 intptr_t* fp; | |
350 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp); | |
351 return frame(sp, fp, epc.pc()); | |
352 } | |
353 | |
354 // By default, gcc always save frame pointer (%ebp/%rbp) on stack. It may get | |
355 // turned off by -fomit-frame-pointer, | |
356 frame os::get_sender_for_C_frame(frame* fr) { | |
357 return frame(fr->sender_sp(), fr->link(), fr->sender_pc()); | |
358 } | |
359 | |
360 intptr_t* _get_previous_fp() { | |
361 #ifdef SPARC_WORKS | |
362 register intptr_t **ebp; | |
363 __asm__("mov %%"SPELL_REG_FP", %0":"=r"(ebp)); | |
364 #else | |
365 register intptr_t **ebp __asm__ (SPELL_REG_FP); | |
366 #endif | |
367 return (intptr_t*) *ebp; // we want what it points to. | |
368 } | |
369 | |
370 | |
371 frame os::current_frame() { | |
372 intptr_t* fp = _get_previous_fp(); | |
373 frame myframe((intptr_t*)os::current_stack_pointer(), | |
374 (intptr_t*)fp, | |
375 CAST_FROM_FN_PTR(address, os::current_frame)); | |
376 if (os::is_first_C_frame(&myframe)) { | |
377 // stack is not walkable | |
378 return frame(NULL, NULL, NULL); | |
379 } else { | |
380 return os::get_sender_for_C_frame(&myframe); | |
381 } | |
382 } | |
383 | |
384 // Utility functions | |
385 | |
386 // From IA32 System Programming Guide | |
387 enum { | |
388 trap_page_fault = 0xE | |
389 }; | |
390 | |
391 extern "C" void Fetch32PFI () ; | |
392 extern "C" void Fetch32Resume () ; | |
393 #ifdef AMD64 | |
394 extern "C" void FetchNPFI () ; | |
395 extern "C" void FetchNResume () ; | |
396 #endif // AMD64 | |
397 | |
398 extern "C" JNIEXPORT int | |
399 JVM_handle_bsd_signal(int sig, | |
400 siginfo_t* info, | |
401 void* ucVoid, | |
402 int abort_if_unrecognized) { | |
403 ucontext_t* uc = (ucontext_t*) ucVoid; | |
404 | |
405 Thread* t = ThreadLocalStorage::get_thread_slow(); | |
406 | |
407 SignalHandlerMark shm(t); | |
408 | |
409 // Note: it's not uncommon that JNI code uses signal/sigset to install | |
410 // then restore certain signal handler (e.g. to temporarily block SIGPIPE, | |
411 // or have a SIGILL handler when detecting CPU type). When that happens, | |
412 // JVM_handle_bsd_signal() might be invoked with junk info/ucVoid. To | |
413 // avoid unnecessary crash when libjsig is not preloaded, try handle signals | |
414 // that do not require siginfo/ucontext first. | |
415 | |
416 if (sig == SIGPIPE || sig == SIGXFSZ) { | |
417 // allow chained handler to go first | |
418 if (os::Bsd::chained_handler(sig, info, ucVoid)) { | |
419 return true; | |
420 } else { | |
421 if (PrintMiscellaneous && (WizardMode || Verbose)) { | |
422 char buf[64]; | |
423 warning("Ignoring %s - see bugs 4229104 or 646499219", | |
424 os::exception_name(sig, buf, sizeof(buf))); | |
425 } | |
426 return true; | |
427 } | |
428 } | |
429 | |
430 JavaThread* thread = NULL; | |
431 VMThread* vmthread = NULL; | |
432 if (os::Bsd::signal_handlers_are_installed) { | |
433 if (t != NULL ){ | |
434 if(t->is_Java_thread()) { | |
435 thread = (JavaThread*)t; | |
436 } | |
437 else if(t->is_VM_thread()){ | |
438 vmthread = (VMThread *)t; | |
439 } | |
440 } | |
441 } | |
442 /* | |
443 NOTE: does not seem to work on bsd. | |
444 if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) { | |
445 // can't decode this kind of signal | |
446 info = NULL; | |
447 } else { | |
448 assert(sig == info->si_signo, "bad siginfo"); | |
449 } | |
450 */ | |
451 // decide if this trap can be handled by a stub | |
452 address stub = NULL; | |
453 | |
454 address pc = NULL; | |
455 | |
456 //%note os_trap_1 | |
457 if (info != NULL && uc != NULL && thread != NULL) { | |
458 pc = (address) os::Bsd::ucontext_get_pc(uc); | |
459 | |
460 if (pc == (address) Fetch32PFI) { | |
461 uc->context_pc = intptr_t(Fetch32Resume) ; | |
462 return 1 ; | |
463 } | |
464 #ifdef AMD64 | |
465 if (pc == (address) FetchNPFI) { | |
466 uc->context_pc = intptr_t (FetchNResume) ; | |
467 return 1 ; | |
468 } | |
469 #endif // AMD64 | |
470 | |
471 // Handle ALL stack overflow variations here | |
472 if (sig == SIGSEGV || sig == SIGBUS) { | |
473 address addr = (address) info->si_addr; | |
474 | |
475 // check if fault address is within thread stack | |
476 if (addr < thread->stack_base() && | |
477 addr >= thread->stack_base() - thread->stack_size()) { | |
478 // stack overflow | |
479 if (thread->in_stack_yellow_zone(addr)) { | |
480 thread->disable_stack_yellow_zone(); | |
481 if (thread->thread_state() == _thread_in_Java) { | |
482 // Throw a stack overflow exception. Guard pages will be reenabled | |
483 // while unwinding the stack. | |
484 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW); | |
485 } else { | |
486 // Thread was in the vm or native code. Return and try to finish. | |
487 return 1; | |
488 } | |
489 } else if (thread->in_stack_red_zone(addr)) { | |
490 // Fatal red zone violation. Disable the guard pages and fall through | |
491 // to handle_unexpected_exception way down below. | |
492 thread->disable_stack_red_zone(); | |
493 tty->print_raw_cr("An irrecoverable stack overflow has occurred."); | |
494 #ifndef _ALLBSD_SOURCE | |
495 } else { | |
496 // Accessing stack address below sp may cause SEGV if current | |
497 // thread has MAP_GROWSDOWN stack. This should only happen when | |
498 // current thread was created by user code with MAP_GROWSDOWN flag | |
499 // and then attached to VM. See notes in os_bsd.cpp. | |
500 if (thread->osthread()->expanding_stack() == 0) { | |
501 thread->osthread()->set_expanding_stack(); | |
502 if (os::Bsd::manually_expand_stack(thread, addr)) { | |
503 thread->osthread()->clear_expanding_stack(); | |
504 return 1; | |
505 } | |
506 thread->osthread()->clear_expanding_stack(); | |
507 } else { | |
508 fatal("recursive segv. expanding stack."); | |
509 } | |
510 #endif | |
511 } | |
512 } | |
513 } | |
514 | |
515 if (thread->thread_state() == _thread_in_Java) { | |
516 // Java thread running in Java code => find exception handler if any | |
517 // a fault inside compiled code, the interpreter, or a stub | |
518 | |
519 if ((sig == SIGSEGV || sig == SIGBUS) && os::is_poll_address((address)info->si_addr)) { | |
520 stub = SharedRuntime::get_poll_stub(pc); | |
521 #if defined(__APPLE__) && !defined(AMD64) | |
522 // 32-bit Darwin reports a SIGBUS for nearly all memory access exceptions. | |
523 // Catching SIGBUS here prevents the implicit SIGBUS NULL check below from | |
524 // being called, so only do so if the implicit NULL check is not necessary. | |
525 } else if (sig == SIGBUS && MacroAssembler::needs_explicit_null_check((int)info->si_addr)) { | |
526 #else | |
527 } else if (sig == SIGBUS /* && info->si_code == BUS_OBJERR */) { | |
528 #endif | |
529 // BugId 4454115: A read from a MappedByteBuffer can fault | |
530 // here if the underlying file has been truncated. | |
531 // Do not crash the VM in such a case. | |
532 CodeBlob* cb = CodeCache::find_blob_unsafe(pc); | |
533 nmethod* nm = cb->is_nmethod() ? (nmethod*)cb : NULL; | |
534 if (nm != NULL && nm->has_unsafe_access()) { | |
535 stub = StubRoutines::handler_for_unsafe_access(); | |
536 } | |
537 } | |
538 else | |
539 | |
540 #ifdef AMD64 | |
541 if (sig == SIGFPE && | |
542 (info->si_code == FPE_INTDIV || info->si_code == FPE_FLTDIV)) { | |
543 stub = | |
544 SharedRuntime:: | |
545 continuation_for_implicit_exception(thread, | |
546 pc, | |
547 SharedRuntime:: | |
548 IMPLICIT_DIVIDE_BY_ZERO); | |
549 #ifdef __APPLE__ | |
550 } else if (sig == SIGFPE && info->si_code == FPE_NOOP) { | |
551 int op = pc[0]; | |
552 | |
553 // Skip REX | |
554 if ((pc[0] & 0xf0) == 0x40) { | |
555 op = pc[1]; | |
556 } else { | |
557 op = pc[0]; | |
558 } | |
559 | |
560 // Check for IDIV | |
561 if (op == 0xF7) { | |
562 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime:: IMPLICIT_DIVIDE_BY_ZERO); | |
563 } else { | |
564 // TODO: handle more cases if we are using other x86 instructions | |
565 // that can generate SIGFPE signal. | |
566 tty->print_cr("unknown opcode 0x%X with SIGFPE.", op); | |
567 fatal("please update this code."); | |
568 } | |
569 #endif /* __APPLE__ */ | |
570 | |
571 #else | |
572 if (sig == SIGFPE /* && info->si_code == FPE_INTDIV */) { | |
573 // HACK: si_code does not work on bsd 2.2.12-20!!! | |
574 int op = pc[0]; | |
575 if (op == 0xDB) { | |
576 // FIST | |
577 // TODO: The encoding of D2I in i486.ad can cause an exception | |
578 // prior to the fist instruction if there was an invalid operation | |
579 // pending. We want to dismiss that exception. From the win_32 | |
580 // side it also seems that if it really was the fist causing | |
581 // the exception that we do the d2i by hand with different | |
582 // rounding. Seems kind of weird. | |
583 // NOTE: that we take the exception at the NEXT floating point instruction. | |
584 assert(pc[0] == 0xDB, "not a FIST opcode"); | |
585 assert(pc[1] == 0x14, "not a FIST opcode"); | |
586 assert(pc[2] == 0x24, "not a FIST opcode"); | |
587 return true; | |
588 } else if (op == 0xF7) { | |
589 // IDIV | |
590 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); | |
591 } else { | |
592 // TODO: handle more cases if we are using other x86 instructions | |
593 // that can generate SIGFPE signal on bsd. | |
594 tty->print_cr("unknown opcode 0x%X with SIGFPE.", op); | |
595 fatal("please update this code."); | |
596 } | |
597 #endif // AMD64 | |
598 } else if ((sig == SIGSEGV || sig == SIGBUS) && | |
599 !MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) { | |
600 // Determination of interpreter/vtable stub/compiled code null exception | |
601 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); | |
602 } | |
603 } else if (thread->thread_state() == _thread_in_vm && | |
604 sig == SIGBUS && /* info->si_code == BUS_OBJERR && */ | |
605 thread->doing_unsafe_access()) { | |
606 stub = StubRoutines::handler_for_unsafe_access(); | |
607 } | |
608 | |
609 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in | |
610 // and the heap gets shrunk before the field access. | |
611 if ((sig == SIGSEGV) || (sig == SIGBUS)) { | |
612 address addr = JNI_FastGetField::find_slowcase_pc(pc); | |
613 if (addr != (address)-1) { | |
614 stub = addr; | |
615 } | |
616 } | |
617 | |
618 // Check to see if we caught the safepoint code in the | |
619 // process of write protecting the memory serialization page. | |
620 // It write enables the page immediately after protecting it | |
621 // so we can just return to retry the write. | |
622 if ((sig == SIGSEGV || sig == SIGBUS) && | |
623 os::is_memory_serialize_page(thread, (address) info->si_addr)) { | |
624 // Block current thread until the memory serialize page permission restored. | |
625 os::block_on_serialize_page_trap(); | |
626 return true; | |
627 } | |
628 } | |
629 | |
630 #ifndef AMD64 | |
631 // Execution protection violation | |
632 // | |
633 // This should be kept as the last step in the triage. We don't | |
634 // have a dedicated trap number for a no-execute fault, so be | |
635 // conservative and allow other handlers the first shot. | |
636 // | |
637 // Note: We don't test that info->si_code == SEGV_ACCERR here. | |
638 // this si_code is so generic that it is almost meaningless; and | |
639 // the si_code for this condition may change in the future. | |
640 // Furthermore, a false-positive should be harmless. | |
641 if (UnguardOnExecutionViolation > 0 && | |
642 (sig == SIGSEGV || sig == SIGBUS) && | |
643 uc->context_trapno == trap_page_fault) { | |
644 int page_size = os::vm_page_size(); | |
645 address addr = (address) info->si_addr; | |
646 address pc = os::Bsd::ucontext_get_pc(uc); | |
647 // Make sure the pc and the faulting address are sane. | |
648 // | |
649 // If an instruction spans a page boundary, and the page containing | |
650 // the beginning of the instruction is executable but the following | |
651 // page is not, the pc and the faulting address might be slightly | |
652 // different - we still want to unguard the 2nd page in this case. | |
653 // | |
654 // 15 bytes seems to be a (very) safe value for max instruction size. | |
655 bool pc_is_near_addr = | |
656 (pointer_delta((void*) addr, (void*) pc, sizeof(char)) < 15); | |
657 bool instr_spans_page_boundary = | |
658 (align_size_down((intptr_t) pc ^ (intptr_t) addr, | |
659 (intptr_t) page_size) > 0); | |
660 | |
661 if (pc == addr || (pc_is_near_addr && instr_spans_page_boundary)) { | |
662 static volatile address last_addr = | |
663 (address) os::non_memory_address_word(); | |
664 | |
665 // In conservative mode, don't unguard unless the address is in the VM | |
666 if (addr != last_addr && | |
667 (UnguardOnExecutionViolation > 1 || os::address_is_in_vm(addr))) { | |
668 | |
669 // Set memory to RWX and retry | |
670 address page_start = | |
671 (address) align_size_down((intptr_t) addr, (intptr_t) page_size); | |
672 bool res = os::protect_memory((char*) page_start, page_size, | |
673 os::MEM_PROT_RWX); | |
674 | |
675 if (PrintMiscellaneous && Verbose) { | |
676 char buf[256]; | |
677 jio_snprintf(buf, sizeof(buf), "Execution protection violation " | |
678 "at " INTPTR_FORMAT | |
679 ", unguarding " INTPTR_FORMAT ": %s, errno=%d", addr, | |
680 page_start, (res ? "success" : "failed"), errno); | |
681 tty->print_raw_cr(buf); | |
682 } | |
683 stub = pc; | |
684 | |
685 // Set last_addr so if we fault again at the same address, we don't end | |
686 // up in an endless loop. | |
687 // | |
688 // There are two potential complications here. Two threads trapping at | |
689 // the same address at the same time could cause one of the threads to | |
690 // think it already unguarded, and abort the VM. Likely very rare. | |
691 // | |
692 // The other race involves two threads alternately trapping at | |
693 // different addresses and failing to unguard the page, resulting in | |
694 // an endless loop. This condition is probably even more unlikely than | |
695 // the first. | |
696 // | |
697 // Although both cases could be avoided by using locks or thread local | |
698 // last_addr, these solutions are unnecessary complication: this | |
699 // handler is a best-effort safety net, not a complete solution. It is | |
700 // disabled by default and should only be used as a workaround in case | |
701 // we missed any no-execute-unsafe VM code. | |
702 | |
703 last_addr = addr; | |
704 } | |
705 } | |
706 } | |
707 #endif // !AMD64 | |
708 | |
709 if (stub != NULL) { | |
710 // save all thread context in case we need to restore it | |
711 if (thread != NULL) thread->set_saved_exception_pc(pc); | |
712 | |
713 uc->context_pc = (intptr_t)stub; | |
714 return true; | |
715 } | |
716 | |
717 // signal-chaining | |
718 if (os::Bsd::chained_handler(sig, info, ucVoid)) { | |
719 return true; | |
720 } | |
721 | |
722 if (!abort_if_unrecognized) { | |
723 // caller wants another chance, so give it to him | |
724 return false; | |
725 } | |
726 | |
727 if (pc == NULL && uc != NULL) { | |
728 pc = os::Bsd::ucontext_get_pc(uc); | |
729 } | |
730 | |
731 // unmask current signal | |
732 sigset_t newset; | |
733 sigemptyset(&newset); | |
734 sigaddset(&newset, sig); | |
735 sigprocmask(SIG_UNBLOCK, &newset, NULL); | |
736 | |
737 VMError err(t, sig, pc, info, ucVoid); | |
738 err.report_and_die(); | |
739 | |
740 ShouldNotReachHere(); | |
741 } | |
742 | |
743 #ifdef _ALLBSD_SOURCE | |
744 // From solaris_i486.s ported to bsd_i486.s | |
745 extern "C" void fixcw(); | |
746 #endif | |
747 | |
748 void os::Bsd::init_thread_fpu_state(void) { | |
749 #ifndef AMD64 | |
750 # ifdef _ALLBSD_SOURCE | |
751 // Set fpu to 53 bit precision. This happens too early to use a stub. | |
752 fixcw(); | |
753 # else | |
754 // set fpu to 53 bit precision | |
755 set_fpu_control_word(0x27f); | |
756 # endif | |
757 #endif // !AMD64 | |
758 } | |
759 | |
760 #ifndef _ALLBSD_SOURCE | |
761 int os::Bsd::get_fpu_control_word(void) { | |
762 #ifdef AMD64 | |
763 return 0; | |
764 #else | |
765 int fpu_control; | |
766 _FPU_GETCW(fpu_control); | |
767 return fpu_control & 0xffff; | |
768 #endif // AMD64 | |
769 } | |
770 | |
771 void os::Bsd::set_fpu_control_word(int fpu_control) { | |
772 #ifndef AMD64 | |
773 _FPU_SETCW(fpu_control); | |
774 #endif // !AMD64 | |
775 } | |
776 #endif | |
777 | |
778 // Check that the bsd kernel version is 2.4 or higher since earlier | |
779 // versions do not support SSE without patches. | |
780 bool os::supports_sse() { | |
781 #if defined(AMD64) || defined(_ALLBSD_SOURCE) | |
782 return true; | |
783 #else | |
784 struct utsname uts; | |
785 if( uname(&uts) != 0 ) return false; // uname fails? | |
786 char *minor_string; | |
787 int major = strtol(uts.release,&minor_string,10); | |
788 int minor = strtol(minor_string+1,NULL,10); | |
789 bool result = (major > 2 || (major==2 && minor >= 4)); | |
790 #ifndef PRODUCT | |
791 if (PrintMiscellaneous && Verbose) { | |
792 tty->print("OS version is %d.%d, which %s support SSE/SSE2\n", | |
793 major,minor, result ? "DOES" : "does NOT"); | |
794 } | |
795 #endif | |
796 return result; | |
797 #endif // AMD64 | |
798 } | |
799 | |
800 bool os::is_allocatable(size_t bytes) { | |
801 #ifdef AMD64 | |
802 // unused on amd64? | |
803 return true; | |
804 #else | |
805 | |
806 if (bytes < 2 * G) { | |
807 return true; | |
808 } | |
809 | |
810 char* addr = reserve_memory(bytes, NULL); | |
811 | |
812 if (addr != NULL) { | |
813 release_memory(addr, bytes); | |
814 } | |
815 | |
816 return addr != NULL; | |
817 #endif // AMD64 | |
818 } | |
819 | |
820 //////////////////////////////////////////////////////////////////////////////// | |
821 // thread stack | |
822 | |
823 #ifdef AMD64 | |
824 size_t os::Bsd::min_stack_allowed = 64 * K; | |
825 | |
826 // amd64: pthread on amd64 is always in floating stack mode | |
827 bool os::Bsd::supports_variable_stack_size() { return true; } | |
828 #else | |
829 size_t os::Bsd::min_stack_allowed = (48 DEBUG_ONLY(+4))*K; | |
830 | |
831 #ifdef __GNUC__ | |
832 #define GET_GS() ({int gs; __asm__ volatile("movw %%gs, %w0":"=q"(gs)); gs&0xffff;}) | |
833 #endif | |
834 | |
835 #ifdef _ALLBSD_SOURCE | |
836 bool os::Bsd::supports_variable_stack_size() { return true; } | |
837 #else | |
838 // Test if pthread library can support variable thread stack size. BsdThreads | |
839 // in fixed stack mode allocates 2M fixed slot for each thread. BsdThreads | |
840 // in floating stack mode and NPTL support variable stack size. | |
841 bool os::Bsd::supports_variable_stack_size() { | |
842 if (os::Bsd::is_NPTL()) { | |
843 // NPTL, yes | |
844 return true; | |
845 | |
846 } else { | |
847 // Note: We can't control default stack size when creating a thread. | |
848 // If we use non-default stack size (pthread_attr_setstacksize), both | |
849 // floating stack and non-floating stack BsdThreads will return the | |
850 // same value. This makes it impossible to implement this function by | |
851 // detecting thread stack size directly. | |
852 // | |
853 // An alternative approach is to check %gs. Fixed-stack BsdThreads | |
854 // do not use %gs, so its value is 0. Floating-stack BsdThreads use | |
855 // %gs (either as LDT selector or GDT selector, depending on kernel) | |
856 // to access thread specific data. | |
857 // | |
858 // Note that %gs is a reserved glibc register since early 2001, so | |
859 // applications are not allowed to change its value (Ulrich Drepper from | |
860 // Redhat confirmed that all known offenders have been modified to use | |
861 // either %fs or TSD). In the worst case scenario, when VM is embedded in | |
862 // a native application that plays with %gs, we might see non-zero %gs | |
863 // even BsdThreads is running in fixed stack mode. As the result, we'll | |
864 // return true and skip _thread_safety_check(), so we may not be able to | |
865 // detect stack-heap collisions. But otherwise it's harmless. | |
866 // | |
867 #ifdef __GNUC__ | |
868 return (GET_GS() != 0); | |
869 #else | |
870 return false; | |
871 #endif | |
872 } | |
873 } | |
874 #endif | |
875 #endif // AMD64 | |
876 | |
877 // return default stack size for thr_type | |
878 size_t os::Bsd::default_stack_size(os::ThreadType thr_type) { | |
879 // default stack size (compiler thread needs larger stack) | |
880 #ifdef AMD64 | |
881 size_t s = (thr_type == os::compiler_thread ? 4 * M : 1 * M); | |
882 #else | |
883 size_t s = (thr_type == os::compiler_thread ? 2 * M : 512 * K); | |
884 #endif // AMD64 | |
885 return s; | |
886 } | |
887 | |
888 size_t os::Bsd::default_guard_size(os::ThreadType thr_type) { | |
889 // Creating guard page is very expensive. Java thread has HotSpot | |
890 // guard page, only enable glibc guard page for non-Java threads. | |
891 return (thr_type == java_thread ? 0 : page_size()); | |
892 } | |
893 | |
894 // Java thread: | |
895 // | |
896 // Low memory addresses | |
897 // +------------------------+ | |
898 // | |\ JavaThread created by VM does not have glibc | |
899 // | glibc guard page | - guard, attached Java thread usually has | |
900 // | |/ 1 page glibc guard. | |
901 // P1 +------------------------+ Thread::stack_base() - Thread::stack_size() | |
902 // | |\ | |
903 // | HotSpot Guard Pages | - red and yellow pages | |
904 // | |/ | |
905 // +------------------------+ JavaThread::stack_yellow_zone_base() | |
906 // | |\ | |
907 // | Normal Stack | - | |
908 // | |/ | |
909 // P2 +------------------------+ Thread::stack_base() | |
910 // | |
911 // Non-Java thread: | |
912 // | |
913 // Low memory addresses | |
914 // +------------------------+ | |
915 // | |\ | |
916 // | glibc guard page | - usually 1 page | |
917 // | |/ | |
918 // P1 +------------------------+ Thread::stack_base() - Thread::stack_size() | |
919 // | |\ | |
920 // | Normal Stack | - | |
921 // | |/ | |
922 // P2 +------------------------+ Thread::stack_base() | |
923 // | |
924 // ** P1 (aka bottom) and size ( P2 = P1 - size) are the address and stack size returned from | |
925 // pthread_attr_getstack() | |
926 | |
927 static void current_stack_region(address * bottom, size_t * size) { | |
928 #ifdef __APPLE__ | |
929 pthread_t self = pthread_self(); | |
930 void *stacktop = pthread_get_stackaddr_np(self); | |
931 *size = pthread_get_stacksize_np(self); | |
932 *bottom = (address) stacktop - *size; | |
933 #elif defined(__OpenBSD__) | |
934 stack_t ss; | |
935 int rslt = pthread_stackseg_np(pthread_self(), &ss); | |
936 | |
937 if (rslt != 0) | |
938 fatal(err_msg("pthread_stackseg_np failed with err = %d", rslt)); | |
939 | |
940 *bottom = (address)((char *)ss.ss_sp - ss.ss_size); | |
941 *size = ss.ss_size; | |
942 #elif defined(_ALLBSD_SOURCE) | |
943 pthread_attr_t attr; | |
944 | |
945 int rslt = pthread_attr_init(&attr); | |
946 | |
947 // JVM needs to know exact stack location, abort if it fails | |
948 if (rslt != 0) | |
949 fatal(err_msg("pthread_attr_init failed with err = %d", rslt)); | |
950 | |
951 rslt = pthread_attr_get_np(pthread_self(), &attr); | |
952 | |
953 if (rslt != 0) | |
954 fatal(err_msg("pthread_attr_get_np failed with err = %d", rslt)); | |
955 | |
956 if (pthread_attr_getstackaddr(&attr, (void **)bottom) != 0 || | |
957 pthread_attr_getstacksize(&attr, size) != 0) { | |
958 fatal("Can not locate current stack attributes!"); | |
959 } | |
960 | |
961 pthread_attr_destroy(&attr); | |
962 #else | |
963 if (os::Bsd::is_initial_thread()) { | |
964 // initial thread needs special handling because pthread_getattr_np() | |
965 // may return bogus value. | |
966 *bottom = os::Bsd::initial_thread_stack_bottom(); | |
967 *size = os::Bsd::initial_thread_stack_size(); | |
968 } else { | |
969 pthread_attr_t attr; | |
970 | |
971 int rslt = pthread_getattr_np(pthread_self(), &attr); | |
972 | |
973 // JVM needs to know exact stack location, abort if it fails | |
974 if (rslt != 0) { | |
975 if (rslt == ENOMEM) { | |
976 vm_exit_out_of_memory(0, "pthread_getattr_np"); | |
977 } else { | |
978 fatal(err_msg("pthread_getattr_np failed with errno = %d", rslt)); | |
979 } | |
980 } | |
981 | |
982 if (pthread_attr_getstack(&attr, (void **)bottom, size) != 0) { | |
983 fatal("Can not locate current stack attributes!"); | |
984 } | |
985 | |
986 pthread_attr_destroy(&attr); | |
987 | |
988 } | |
989 #endif | |
990 assert(os::current_stack_pointer() >= *bottom && | |
991 os::current_stack_pointer() < *bottom + *size, "just checking"); | |
992 } | |
993 | |
994 address os::current_stack_base() { | |
995 address bottom; | |
996 size_t size; | |
997 current_stack_region(&bottom, &size); | |
998 return (bottom + size); | |
999 } | |
1000 | |
1001 size_t os::current_stack_size() { | |
1002 // stack size includes normal stack and HotSpot guard pages | |
1003 address bottom; | |
1004 size_t size; | |
1005 current_stack_region(&bottom, &size); | |
1006 return size; | |
1007 } | |
1008 | |
1009 ///////////////////////////////////////////////////////////////////////////// | |
1010 // helper functions for fatal error handler | |
1011 | |
1012 void os::print_context(outputStream *st, void *context) { | |
1013 if (context == NULL) return; | |
1014 | |
1015 ucontext_t *uc = (ucontext_t*)context; | |
1016 st->print_cr("Registers:"); | |
1017 #ifdef AMD64 | |
1018 st->print( "RAX=" INTPTR_FORMAT, uc->context_rax); | |
1019 st->print(", RBX=" INTPTR_FORMAT, uc->context_rbx); | |
1020 st->print(", RCX=" INTPTR_FORMAT, uc->context_rcx); | |
1021 st->print(", RDX=" INTPTR_FORMAT, uc->context_rdx); | |
1022 st->cr(); | |
1023 st->print( "RSP=" INTPTR_FORMAT, uc->context_rsp); | |
1024 st->print(", RBP=" INTPTR_FORMAT, uc->context_rbp); | |
1025 st->print(", RSI=" INTPTR_FORMAT, uc->context_rsi); | |
1026 st->print(", RDI=" INTPTR_FORMAT, uc->context_rdi); | |
1027 st->cr(); | |
1028 st->print( "R8 =" INTPTR_FORMAT, uc->context_r8); | |
1029 st->print(", R9 =" INTPTR_FORMAT, uc->context_r9); | |
1030 st->print(", R10=" INTPTR_FORMAT, uc->context_r10); | |
1031 st->print(", R11=" INTPTR_FORMAT, uc->context_r11); | |
1032 st->cr(); | |
1033 st->print( "R12=" INTPTR_FORMAT, uc->context_r12); | |
1034 st->print(", R13=" INTPTR_FORMAT, uc->context_r13); | |
1035 st->print(", R14=" INTPTR_FORMAT, uc->context_r14); | |
1036 st->print(", R15=" INTPTR_FORMAT, uc->context_r15); | |
1037 st->cr(); | |
1038 st->print( "RIP=" INTPTR_FORMAT, uc->context_rip); | |
1039 st->print(", EFLAGS=" INTPTR_FORMAT, uc->context_flags); | |
1040 st->print(", ERR=" INTPTR_FORMAT, uc->context_err); | |
1041 st->cr(); | |
1042 st->print(" TRAPNO=" INTPTR_FORMAT, uc->context_trapno); | |
1043 #else | |
1044 st->print( "EAX=" INTPTR_FORMAT, uc->context_eax); | |
1045 st->print(", EBX=" INTPTR_FORMAT, uc->context_ebx); | |
1046 st->print(", ECX=" INTPTR_FORMAT, uc->context_ecx); | |
1047 st->print(", EDX=" INTPTR_FORMAT, uc->context_edx); | |
1048 st->cr(); | |
1049 st->print( "ESP=" INTPTR_FORMAT, uc->context_esp); | |
1050 st->print(", EBP=" INTPTR_FORMAT, uc->context_ebp); | |
1051 st->print(", ESI=" INTPTR_FORMAT, uc->context_esi); | |
1052 st->print(", EDI=" INTPTR_FORMAT, uc->context_edi); | |
1053 st->cr(); | |
1054 st->print( "EIP=" INTPTR_FORMAT, uc->context_eip); | |
1055 st->print(", EFLAGS=" INTPTR_FORMAT, uc->context_eflags); | |
1056 #endif // AMD64 | |
1057 st->cr(); | |
1058 st->cr(); | |
1059 | |
1060 intptr_t *sp = (intptr_t *)os::Bsd::ucontext_get_sp(uc); | |
1061 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp); | |
1062 print_hex_dump(st, (address)sp, (address)(sp + 8*sizeof(intptr_t)), sizeof(intptr_t)); | |
1063 st->cr(); | |
1064 | |
1065 // Note: it may be unsafe to inspect memory near pc. For example, pc may | |
1066 // point to garbage if entry point in an nmethod is corrupted. Leave | |
1067 // this at the end, and hope for the best. | |
1068 address pc = os::Bsd::ucontext_get_pc(uc); | |
1069 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc); | |
1070 print_hex_dump(st, pc - 32, pc + 32, sizeof(char)); | |
1071 } | |
1072 | |
1073 void os::print_register_info(outputStream *st, void *context) { | |
1074 if (context == NULL) return; | |
1075 | |
1076 ucontext_t *uc = (ucontext_t*)context; | |
1077 | |
1078 st->print_cr("Register to memory mapping:"); | |
1079 st->cr(); | |
1080 | |
1081 // this is horrendously verbose but the layout of the registers in the | |
1082 // context does not match how we defined our abstract Register set, so | |
1083 // we can't just iterate through the gregs area | |
1084 | |
1085 // this is only for the "general purpose" registers | |
1086 | |
1087 #ifdef AMD64 | |
1088 st->print("RAX="); print_location(st, uc->context_rax); | |
1089 st->print("RBX="); print_location(st, uc->context_rbx); | |
1090 st->print("RCX="); print_location(st, uc->context_rcx); | |
1091 st->print("RDX="); print_location(st, uc->context_rdx); | |
1092 st->print("RSP="); print_location(st, uc->context_rsp); | |
1093 st->print("RBP="); print_location(st, uc->context_rbp); | |
1094 st->print("RSI="); print_location(st, uc->context_rsi); | |
1095 st->print("RDI="); print_location(st, uc->context_rdi); | |
1096 st->print("R8 ="); print_location(st, uc->context_r8); | |
1097 st->print("R9 ="); print_location(st, uc->context_r9); | |
1098 st->print("R10="); print_location(st, uc->context_r10); | |
1099 st->print("R11="); print_location(st, uc->context_r11); | |
1100 st->print("R12="); print_location(st, uc->context_r12); | |
1101 st->print("R13="); print_location(st, uc->context_r13); | |
1102 st->print("R14="); print_location(st, uc->context_r14); | |
1103 st->print("R15="); print_location(st, uc->context_r15); | |
1104 #else | |
1105 st->print("EAX="); print_location(st, uc->context_eax); | |
1106 st->print("EBX="); print_location(st, uc->context_ebx); | |
1107 st->print("ECX="); print_location(st, uc->context_ecx); | |
1108 st->print("EDX="); print_location(st, uc->context_edx); | |
1109 st->print("ESP="); print_location(st, uc->context_esp); | |
1110 st->print("EBP="); print_location(st, uc->context_ebp); | |
1111 st->print("ESI="); print_location(st, uc->context_esi); | |
1112 st->print("EDI="); print_location(st, uc->context_edi); | |
1113 #endif // AMD64 | |
1114 | |
1115 st->cr(); | |
1116 } | |
1117 | |
1118 void os::setup_fpu() { | |
1119 #ifndef AMD64 | |
1120 address fpu_cntrl = StubRoutines::addr_fpu_cntrl_wrd_std(); | |
1121 __asm__ volatile ( "fldcw (%0)" : | |
1122 : "r" (fpu_cntrl) : "memory"); | |
1123 #endif // !AMD64 | |
1124 } |