Mercurial > hg > truffle
annotate src/os_cpu/solaris_x86/vm/os_solaris_x86.cpp @ 4664:60a8f52c0be0
Fixed regression in mx.py
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Tue, 21 Feb 2012 19:35:51 +0100 |
parents | 1d1603768966 |
children | da4be62fb889 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 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_solaris.h" | |
34 #include "memory/allocation.inline.hpp" | |
35 #include "mutex_solaris.inline.hpp" | |
36 #include "nativeInst_x86.hpp" | |
37 #include "os_share_solaris.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_solaris.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 | |
0 | 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 <setjmp.h> | |
68 # include <errno.h> | |
69 # include <dlfcn.h> | |
70 # include <stdio.h> | |
71 # include <unistd.h> | |
72 # include <sys/resource.h> | |
73 # include <thread.h> | |
74 # include <sys/stat.h> | |
75 # include <sys/time.h> | |
76 # include <sys/filio.h> | |
77 # include <sys/utsname.h> | |
78 # include <sys/systeminfo.h> | |
79 # include <sys/socket.h> | |
80 # include <sys/trap.h> | |
81 # include <sys/lwp.h> | |
82 # include <pwd.h> | |
83 # include <poll.h> | |
84 # include <sys/lwp.h> | |
85 # include <procfs.h> // see comment in <sys/procfs.h> | |
86 | |
87 #ifndef AMD64 | |
88 // QQQ seems useless at this point | |
89 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later | |
90 #endif // AMD64 | |
91 # include <sys/procfs.h> // see comment in <sys/procfs.h> | |
92 | |
93 | |
94 #define MAX_PATH (2 * K) | |
95 | |
96 // Minimum stack size for the VM. It's easier to document a constant value | |
97 // but it's different for x86 and sparc because the page sizes are different. | |
98 #ifdef AMD64 | |
99 size_t os::Solaris::min_stack_allowed = 224*K; | |
100 #define REG_SP REG_RSP | |
101 #define REG_PC REG_RIP | |
102 #define REG_FP REG_RBP | |
103 #else | |
104 size_t os::Solaris::min_stack_allowed = 64*K; | |
105 #define REG_SP UESP | |
106 #define REG_PC EIP | |
107 #define REG_FP EBP | |
108 // 4900493 counter to prevent runaway LDTR refresh attempt | |
109 | |
110 static volatile int ldtr_refresh = 0; | |
111 // the libthread instruction that faults because of the stale LDTR | |
112 | |
113 static const unsigned char movlfs[] = { 0x8e, 0xe0 // movl %eax,%fs | |
114 }; | |
115 #endif // AMD64 | |
116 | |
117 char* os::non_memory_address_word() { | |
118 // Must never look like an address returned by reserve_memory, | |
119 // even in its subfields (as defined by the CPU immediate fields, | |
120 // if the CPU splits constants across multiple instructions). | |
121 return (char*) -1; | |
122 } | |
123 | |
124 // | |
125 // Validate a ucontext retrieved from walking a uc_link of a ucontext. | |
126 // There are issues with libthread giving out uc_links for different threads | |
127 // on the same uc_link chain and bad or circular links. | |
128 // | |
129 bool os::Solaris::valid_ucontext(Thread* thread, ucontext_t* valid, ucontext_t* suspect) { | |
130 if (valid >= suspect || | |
131 valid->uc_stack.ss_flags != suspect->uc_stack.ss_flags || | |
132 valid->uc_stack.ss_sp != suspect->uc_stack.ss_sp || | |
133 valid->uc_stack.ss_size != suspect->uc_stack.ss_size) { | |
134 DEBUG_ONLY(tty->print_cr("valid_ucontext: failed test 1");) | |
135 return false; | |
136 } | |
137 | |
138 if (thread->is_Java_thread()) { | |
139 if (!valid_stack_address(thread, (address)suspect)) { | |
140 DEBUG_ONLY(tty->print_cr("valid_ucontext: uc_link not in thread stack");) | |
141 return false; | |
142 } | |
143 if (!valid_stack_address(thread, (address) suspect->uc_mcontext.gregs[REG_SP])) { | |
144 DEBUG_ONLY(tty->print_cr("valid_ucontext: stackpointer not in thread stack");) | |
145 return false; | |
146 } | |
147 } | |
148 return true; | |
149 } | |
150 | |
151 // We will only follow one level of uc_link since there are libthread | |
152 // issues with ucontext linking and it is better to be safe and just | |
153 // let caller retry later. | |
154 ucontext_t* os::Solaris::get_valid_uc_in_signal_handler(Thread *thread, | |
155 ucontext_t *uc) { | |
156 | |
157 ucontext_t *retuc = NULL; | |
158 | |
159 if (uc != NULL) { | |
160 if (uc->uc_link == NULL) { | |
161 // cannot validate without uc_link so accept current ucontext | |
162 retuc = uc; | |
163 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) { | |
164 // first ucontext is valid so try the next one | |
165 uc = uc->uc_link; | |
166 if (uc->uc_link == NULL) { | |
167 // cannot validate without uc_link so accept current ucontext | |
168 retuc = uc; | |
169 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) { | |
170 // the ucontext one level down is also valid so return it | |
171 retuc = uc; | |
172 } | |
173 } | |
174 } | |
175 return retuc; | |
176 } | |
177 | |
178 // Assumes ucontext is valid | |
179 ExtendedPC os::Solaris::ucontext_get_ExtendedPC(ucontext_t *uc) { | |
180 return ExtendedPC((address)uc->uc_mcontext.gregs[REG_PC]); | |
181 } | |
182 | |
183 // Assumes ucontext is valid | |
184 intptr_t* os::Solaris::ucontext_get_sp(ucontext_t *uc) { | |
185 return (intptr_t*)uc->uc_mcontext.gregs[REG_SP]; | |
186 } | |
187 | |
188 // Assumes ucontext is valid | |
189 intptr_t* os::Solaris::ucontext_get_fp(ucontext_t *uc) { | |
190 return (intptr_t*)uc->uc_mcontext.gregs[REG_FP]; | |
191 } | |
192 | |
193 // For Forte Analyzer AsyncGetCallTrace profiling support - thread | |
194 // is currently interrupted by SIGPROF. | |
195 // | |
196 // The difference between this and os::fetch_frame_from_context() is that | |
197 // here we try to skip nested signal frames. | |
198 ExtendedPC os::Solaris::fetch_frame_from_ucontext(Thread* thread, | |
199 ucontext_t* uc, intptr_t** ret_sp, intptr_t** ret_fp) { | |
200 | |
201 assert(thread != NULL, "just checking"); | |
202 assert(ret_sp != NULL, "just checking"); | |
203 assert(ret_fp != NULL, "just checking"); | |
204 | |
205 ucontext_t *luc = os::Solaris::get_valid_uc_in_signal_handler(thread, uc); | |
206 return os::fetch_frame_from_context(luc, ret_sp, ret_fp); | |
207 } | |
208 | |
209 ExtendedPC os::fetch_frame_from_context(void* ucVoid, | |
210 intptr_t** ret_sp, intptr_t** ret_fp) { | |
211 | |
212 ExtendedPC epc; | |
213 ucontext_t *uc = (ucontext_t*)ucVoid; | |
214 | |
215 if (uc != NULL) { | |
216 epc = os::Solaris::ucontext_get_ExtendedPC(uc); | |
217 if (ret_sp) *ret_sp = os::Solaris::ucontext_get_sp(uc); | |
218 if (ret_fp) *ret_fp = os::Solaris::ucontext_get_fp(uc); | |
219 } else { | |
220 // construct empty ExtendedPC for return value checking | |
221 epc = ExtendedPC(NULL); | |
222 if (ret_sp) *ret_sp = (intptr_t *)NULL; | |
223 if (ret_fp) *ret_fp = (intptr_t *)NULL; | |
224 } | |
225 | |
226 return epc; | |
227 } | |
228 | |
229 frame os::fetch_frame_from_context(void* ucVoid) { | |
230 intptr_t* sp; | |
231 intptr_t* fp; | |
232 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp); | |
233 return frame(sp, fp, epc.pc()); | |
234 } | |
235 | |
236 frame os::get_sender_for_C_frame(frame* fr) { | |
237 return frame(fr->sender_sp(), fr->link(), fr->sender_pc()); | |
238 } | |
239 | |
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240 extern "C" intptr_t *_get_current_fp(); // in .il file |
0 | 241 |
242 frame os::current_frame() { | |
472
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243 intptr_t* fp = _get_current_fp(); // it's inlined so want current fp |
0 | 244 frame myframe((intptr_t*)os::current_stack_pointer(), |
245 (intptr_t*)fp, | |
246 CAST_FROM_FN_PTR(address, os::current_frame)); | |
247 if (os::is_first_C_frame(&myframe)) { | |
248 // stack is not walkable | |
107
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249 frame ret; // This will be a null useless frame |
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250 return ret; |
0 | 251 } else { |
252 return os::get_sender_for_C_frame(&myframe); | |
253 } | |
254 } | |
255 | |
256 // This is a simple callback that just fetches a PC for an interrupted thread. | |
257 // The thread need not be suspended and the fetched PC is just a hint. | |
258 // This one is currently used for profiling the VMThread ONLY! | |
259 | |
260 // Must be synchronous | |
261 void GetThreadPC_Callback::execute(OSThread::InterruptArguments *args) { | |
262 Thread* thread = args->thread(); | |
263 ucontext_t* uc = args->ucontext(); | |
264 intptr_t* sp; | |
265 | |
266 assert(ProfileVM && thread->is_VM_thread(), "just checking"); | |
267 | |
268 ExtendedPC new_addr((address)uc->uc_mcontext.gregs[REG_PC]); | |
269 _addr = new_addr; | |
270 } | |
271 | |
272 static int threadgetstate(thread_t tid, int *flags, lwpid_t *lwp, stack_t *ss, gregset_t rs, lwpstatus_t *lwpstatus) { | |
273 char lwpstatusfile[PROCFILE_LENGTH]; | |
274 int lwpfd, err; | |
275 | |
276 if (err = os::Solaris::thr_getstate(tid, flags, lwp, ss, rs)) | |
277 return (err); | |
278 if (*flags == TRS_LWPID) { | |
279 sprintf(lwpstatusfile, "/proc/%d/lwp/%d/lwpstatus", getpid(), | |
280 *lwp); | |
281 if ((lwpfd = open(lwpstatusfile, O_RDONLY)) < 0) { | |
282 perror("thr_mutator_status: open lwpstatus"); | |
283 return (EINVAL); | |
284 } | |
285 if (pread(lwpfd, lwpstatus, sizeof (lwpstatus_t), (off_t)0) != | |
286 sizeof (lwpstatus_t)) { | |
287 perror("thr_mutator_status: read lwpstatus"); | |
288 (void) close(lwpfd); | |
289 return (EINVAL); | |
290 } | |
291 (void) close(lwpfd); | |
292 } | |
293 return (0); | |
294 } | |
295 | |
296 #ifndef AMD64 | |
297 | |
298 // Detecting SSE support by OS | |
299 // From solaris_i486.s | |
300 extern "C" bool sse_check(); | |
301 extern "C" bool sse_unavailable(); | |
302 | |
303 enum { SSE_UNKNOWN, SSE_NOT_SUPPORTED, SSE_SUPPORTED}; | |
304 static int sse_status = SSE_UNKNOWN; | |
305 | |
306 | |
307 static void check_for_sse_support() { | |
308 if (!VM_Version::supports_sse()) { | |
309 sse_status = SSE_NOT_SUPPORTED; | |
310 return; | |
311 } | |
312 // looking for _sse_hw in libc.so, if it does not exist or | |
313 // the value (int) is 0, OS has no support for SSE | |
314 int *sse_hwp; | |
315 void *h; | |
316 | |
317 if ((h=dlopen("/usr/lib/libc.so", RTLD_LAZY)) == NULL) { | |
318 //open failed, presume no support for SSE | |
319 sse_status = SSE_NOT_SUPPORTED; | |
320 return; | |
321 } | |
322 if ((sse_hwp = (int *)dlsym(h, "_sse_hw")) == NULL) { | |
323 sse_status = SSE_NOT_SUPPORTED; | |
324 } else if (*sse_hwp == 0) { | |
325 sse_status = SSE_NOT_SUPPORTED; | |
326 } | |
327 dlclose(h); | |
328 | |
329 if (sse_status == SSE_UNKNOWN) { | |
330 bool (*try_sse)() = (bool (*)())sse_check; | |
331 sse_status = (*try_sse)() ? SSE_SUPPORTED : SSE_NOT_SUPPORTED; | |
332 } | |
333 | |
334 } | |
335 | |
585 | 336 #endif // AMD64 |
337 | |
0 | 338 bool os::supports_sse() { |
585 | 339 #ifdef AMD64 |
340 return true; | |
341 #else | |
0 | 342 if (sse_status == SSE_UNKNOWN) |
343 check_for_sse_support(); | |
344 return sse_status == SSE_SUPPORTED; | |
585 | 345 #endif // AMD64 |
0 | 346 } |
347 | |
348 bool os::is_allocatable(size_t bytes) { | |
349 #ifdef AMD64 | |
350 return true; | |
351 #else | |
352 | |
353 if (bytes < 2 * G) { | |
354 return true; | |
355 } | |
356 | |
357 char* addr = reserve_memory(bytes, NULL); | |
358 | |
359 if (addr != NULL) { | |
360 release_memory(addr, bytes); | |
361 } | |
362 | |
363 return addr != NULL; | |
364 #endif // AMD64 | |
365 | |
366 } | |
367 | |
368 extern "C" void Fetch32PFI () ; | |
369 extern "C" void Fetch32Resume () ; | |
370 #ifdef AMD64 | |
371 extern "C" void FetchNPFI () ; | |
372 extern "C" void FetchNResume () ; | |
373 #endif // AMD64 | |
374 | |
2191 | 375 extern "C" JNIEXPORT int |
376 JVM_handle_solaris_signal(int sig, siginfo_t* info, void* ucVoid, | |
377 int abort_if_unrecognized) { | |
0 | 378 ucontext_t* uc = (ucontext_t*) ucVoid; |
379 | |
380 #ifndef AMD64 | |
381 if (sig == SIGILL && info->si_addr == (caddr_t)sse_check) { | |
382 // the SSE instruction faulted. supports_sse() need return false. | |
383 uc->uc_mcontext.gregs[EIP] = (greg_t)sse_unavailable; | |
384 return true; | |
385 } | |
386 #endif // !AMD64 | |
387 | |
388 Thread* t = ThreadLocalStorage::get_thread_slow(); // slow & steady | |
389 | |
390 SignalHandlerMark shm(t); | |
391 | |
392 if(sig == SIGPIPE || sig == SIGXFSZ) { | |
393 if (os::Solaris::chained_handler(sig, info, ucVoid)) { | |
394 return true; | |
395 } else { | |
396 if (PrintMiscellaneous && (WizardMode || Verbose)) { | |
397 char buf[64]; | |
398 warning("Ignoring %s - see 4229104 or 6499219", | |
399 os::exception_name(sig, buf, sizeof(buf))); | |
400 | |
401 } | |
402 return true; | |
403 } | |
404 } | |
405 | |
406 JavaThread* thread = NULL; | |
407 VMThread* vmthread = NULL; | |
408 | |
409 if (os::Solaris::signal_handlers_are_installed) { | |
410 if (t != NULL ){ | |
411 if(t->is_Java_thread()) { | |
412 thread = (JavaThread*)t; | |
413 } | |
414 else if(t->is_VM_thread()){ | |
415 vmthread = (VMThread *)t; | |
416 } | |
417 } | |
418 } | |
419 | |
420 guarantee(sig != os::Solaris::SIGinterrupt(), "Can not chain VM interrupt signal, try -XX:+UseAltSigs"); | |
421 | |
422 if (sig == os::Solaris::SIGasync()) { | |
423 if(thread){ | |
424 OSThread::InterruptArguments args(thread, uc); | |
425 thread->osthread()->do_interrupt_callbacks_at_interrupt(&args); | |
426 return true; | |
427 } | |
428 else if(vmthread){ | |
429 OSThread::InterruptArguments args(vmthread, uc); | |
430 vmthread->osthread()->do_interrupt_callbacks_at_interrupt(&args); | |
431 return true; | |
432 } else if (os::Solaris::chained_handler(sig, info, ucVoid)) { | |
433 return true; | |
434 } else { | |
435 // If os::Solaris::SIGasync not chained, and this is a non-vm and | |
436 // non-java thread | |
437 return true; | |
438 } | |
439 } | |
440 | |
441 if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) { | |
442 // can't decode this kind of signal | |
443 info = NULL; | |
444 } else { | |
445 assert(sig == info->si_signo, "bad siginfo"); | |
446 } | |
447 | |
448 // decide if this trap can be handled by a stub | |
449 address stub = NULL; | |
450 | |
451 address pc = NULL; | |
452 | |
453 //%note os_trap_1 | |
454 if (info != NULL && uc != NULL && thread != NULL) { | |
455 // factor me: getPCfromContext | |
456 pc = (address) uc->uc_mcontext.gregs[REG_PC]; | |
457 | |
458 // SafeFetch32() support | |
459 if (pc == (address) Fetch32PFI) { | |
460 uc->uc_mcontext.gregs[REG_PC] = intptr_t(Fetch32Resume) ; | |
461 return true ; | |
462 } | |
463 #ifdef AMD64 | |
464 if (pc == (address) FetchNPFI) { | |
465 uc->uc_mcontext.gregs [REG_PC] = intptr_t(FetchNResume) ; | |
466 return true ; | |
467 } | |
468 #endif // AMD64 | |
469 | |
470 // Handle ALL stack overflow variations here | |
471 if (sig == SIGSEGV && info->si_code == SEGV_ACCERR) { | |
472 address addr = (address) info->si_addr; | |
473 if (thread->in_stack_yellow_zone(addr)) { | |
474 thread->disable_stack_yellow_zone(); | |
475 if (thread->thread_state() == _thread_in_Java) { | |
476 // Throw a stack overflow exception. Guard pages will be reenabled | |
477 // while unwinding the stack. | |
478 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW); | |
479 } else { | |
480 // Thread was in the vm or native code. Return and try to finish. | |
481 return true; | |
482 } | |
483 } else if (thread->in_stack_red_zone(addr)) { | |
484 // Fatal red zone violation. Disable the guard pages and fall through | |
485 // to handle_unexpected_exception way down below. | |
486 thread->disable_stack_red_zone(); | |
487 tty->print_raw_cr("An irrecoverable stack overflow has occurred."); | |
488 } | |
489 } | |
490 | |
491 if (thread->thread_state() == _thread_in_vm) { | |
492 if (sig == SIGBUS && info->si_code == BUS_OBJERR && thread->doing_unsafe_access()) { | |
493 stub = StubRoutines::handler_for_unsafe_access(); | |
494 } | |
495 } | |
496 | |
497 if (thread->thread_state() == _thread_in_Java) { | |
498 // Support Safepoint Polling | |
499 if ( sig == SIGSEGV && os::is_poll_address((address)info->si_addr)) { | |
500 stub = SharedRuntime::get_poll_stub(pc); | |
501 } | |
502 else if (sig == SIGBUS && info->si_code == BUS_OBJERR) { | |
503 // BugId 4454115: A read from a MappedByteBuffer can fault | |
504 // here if the underlying file has been truncated. | |
505 // Do not crash the VM in such a case. | |
506 CodeBlob* cb = CodeCache::find_blob_unsafe(pc); | |
507 nmethod* nm = cb->is_nmethod() ? (nmethod*)cb : NULL; | |
508 if (nm != NULL && nm->has_unsafe_access()) { | |
509 stub = StubRoutines::handler_for_unsafe_access(); | |
510 } | |
511 } | |
512 else | |
513 if (sig == SIGFPE && info->si_code == FPE_INTDIV) { | |
514 // integer divide by zero | |
515 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); | |
516 } | |
517 #ifndef AMD64 | |
518 else if (sig == SIGFPE && info->si_code == FPE_FLTDIV) { | |
519 // floating-point divide by zero | |
520 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); | |
521 } | |
522 else if (sig == SIGFPE && info->si_code == FPE_FLTINV) { | |
523 // The encoding of D2I in i486.ad can cause an exception prior | |
524 // to the fist instruction if there was an invalid operation | |
525 // pending. We want to dismiss that exception. From the win_32 | |
526 // side it also seems that if it really was the fist causing | |
527 // the exception that we do the d2i by hand with different | |
528 // rounding. Seems kind of weird. QQQ TODO | |
529 // Note that we take the exception at the NEXT floating point instruction. | |
530 if (pc[0] == 0xDB) { | |
531 assert(pc[0] == 0xDB, "not a FIST opcode"); | |
532 assert(pc[1] == 0x14, "not a FIST opcode"); | |
533 assert(pc[2] == 0x24, "not a FIST opcode"); | |
534 return true; | |
535 } else { | |
536 assert(pc[-3] == 0xDB, "not an flt invalid opcode"); | |
537 assert(pc[-2] == 0x14, "not an flt invalid opcode"); | |
538 assert(pc[-1] == 0x24, "not an flt invalid opcode"); | |
539 } | |
540 } | |
541 else if (sig == SIGFPE ) { | |
542 tty->print_cr("caught SIGFPE, info 0x%x.", info->si_code); | |
543 } | |
544 #endif // !AMD64 | |
545 | |
546 // QQQ It doesn't seem that we need to do this on x86 because we should be able | |
547 // to return properly from the handler without this extra stuff on the back side. | |
548 | |
549 else if (sig == SIGSEGV && info->si_code > 0 && !MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) { | |
550 // Determination of interpreter/vtable stub/compiled code null exception | |
551 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); | |
552 } | |
553 } | |
554 | |
555 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in | |
556 // and the heap gets shrunk before the field access. | |
557 if ((sig == SIGSEGV) || (sig == SIGBUS)) { | |
558 address addr = JNI_FastGetField::find_slowcase_pc(pc); | |
559 if (addr != (address)-1) { | |
560 stub = addr; | |
561 } | |
562 } | |
563 | |
564 // Check to see if we caught the safepoint code in the | |
565 // process of write protecting the memory serialization page. | |
566 // It write enables the page immediately after protecting it | |
567 // so we can just return to retry the write. | |
568 if ((sig == SIGSEGV) && | |
569 os::is_memory_serialize_page(thread, (address)info->si_addr)) { | |
570 // Block current thread until the memory serialize page permission restored. | |
571 os::block_on_serialize_page_trap(); | |
572 return true; | |
573 } | |
574 } | |
575 | |
576 // Execution protection violation | |
577 // | |
578 // Preventative code for future versions of Solaris which may | |
579 // enable execution protection when running the 32-bit VM on AMD64. | |
580 // | |
581 // This should be kept as the last step in the triage. We don't | |
582 // have a dedicated trap number for a no-execute fault, so be | |
583 // conservative and allow other handlers the first shot. | |
584 // | |
585 // Note: We don't test that info->si_code == SEGV_ACCERR here. | |
586 // this si_code is so generic that it is almost meaningless; and | |
587 // the si_code for this condition may change in the future. | |
588 // Furthermore, a false-positive should be harmless. | |
589 if (UnguardOnExecutionViolation > 0 && | |
590 (sig == SIGSEGV || sig == SIGBUS) && | |
591 uc->uc_mcontext.gregs[TRAPNO] == T_PGFLT) { // page fault | |
592 int page_size = os::vm_page_size(); | |
593 address addr = (address) info->si_addr; | |
594 address pc = (address) uc->uc_mcontext.gregs[REG_PC]; | |
595 // Make sure the pc and the faulting address are sane. | |
596 // | |
597 // If an instruction spans a page boundary, and the page containing | |
598 // the beginning of the instruction is executable but the following | |
599 // page is not, the pc and the faulting address might be slightly | |
600 // different - we still want to unguard the 2nd page in this case. | |
601 // | |
602 // 15 bytes seems to be a (very) safe value for max instruction size. | |
603 bool pc_is_near_addr = | |
604 (pointer_delta((void*) addr, (void*) pc, sizeof(char)) < 15); | |
605 bool instr_spans_page_boundary = | |
606 (align_size_down((intptr_t) pc ^ (intptr_t) addr, | |
607 (intptr_t) page_size) > 0); | |
608 | |
609 if (pc == addr || (pc_is_near_addr && instr_spans_page_boundary)) { | |
610 static volatile address last_addr = | |
611 (address) os::non_memory_address_word(); | |
612 | |
613 // In conservative mode, don't unguard unless the address is in the VM | |
614 if (addr != last_addr && | |
615 (UnguardOnExecutionViolation > 1 || os::address_is_in_vm(addr))) { | |
616 | |
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617 // Make memory rwx and retry |
0 | 618 address page_start = |
619 (address) align_size_down((intptr_t) addr, (intptr_t) page_size); | |
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620 bool res = os::protect_memory((char*) page_start, page_size, |
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621 os::MEM_PROT_RWX); |
0 | 622 |
623 if (PrintMiscellaneous && Verbose) { | |
624 char buf[256]; | |
625 jio_snprintf(buf, sizeof(buf), "Execution protection violation " | |
626 "at " INTPTR_FORMAT | |
627 ", unguarding " INTPTR_FORMAT ": %s, errno=%d", addr, | |
628 page_start, (res ? "success" : "failed"), errno); | |
629 tty->print_raw_cr(buf); | |
630 } | |
631 stub = pc; | |
632 | |
633 // Set last_addr so if we fault again at the same address, we don't end | |
634 // up in an endless loop. | |
635 // | |
636 // There are two potential complications here. Two threads trapping at | |
637 // the same address at the same time could cause one of the threads to | |
638 // think it already unguarded, and abort the VM. Likely very rare. | |
639 // | |
640 // The other race involves two threads alternately trapping at | |
641 // different addresses and failing to unguard the page, resulting in | |
642 // an endless loop. This condition is probably even more unlikely than | |
643 // the first. | |
644 // | |
645 // Although both cases could be avoided by using locks or thread local | |
646 // last_addr, these solutions are unnecessary complication: this | |
647 // handler is a best-effort safety net, not a complete solution. It is | |
648 // disabled by default and should only be used as a workaround in case | |
649 // we missed any no-execute-unsafe VM code. | |
650 | |
651 last_addr = addr; | |
652 } | |
653 } | |
654 } | |
655 | |
656 if (stub != NULL) { | |
657 // save all thread context in case we need to restore it | |
658 | |
659 if (thread != NULL) thread->set_saved_exception_pc(pc); | |
660 // 12/02/99: On Sparc it appears that the full context is also saved | |
661 // but as yet, no one looks at or restores that saved context | |
662 // factor me: setPC | |
663 uc->uc_mcontext.gregs[REG_PC] = (greg_t)stub; | |
664 return true; | |
665 } | |
666 | |
667 // signal-chaining | |
668 if (os::Solaris::chained_handler(sig, info, ucVoid)) { | |
669 return true; | |
670 } | |
671 | |
672 #ifndef AMD64 | |
673 // Workaround (bug 4900493) for Solaris kernel bug 4966651. | |
674 // Handle an undefined selector caused by an attempt to assign | |
675 // fs in libthread getipriptr(). With the current libthread design every 512 | |
676 // thread creations the LDT for a private thread data structure is extended | |
677 // and thre is a hazard that and another thread attempting a thread creation | |
678 // will use a stale LDTR that doesn't reflect the structure's growth, | |
679 // causing a GP fault. | |
680 // Enforce the probable limit of passes through here to guard against an | |
681 // infinite loop if some other move to fs caused the GP fault. Note that | |
682 // this loop counter is ultimately a heuristic as it is possible for | |
683 // more than one thread to generate this fault at a time in an MP system. | |
684 // In the case of the loop count being exceeded or if the poll fails | |
685 // just fall through to a fatal error. | |
686 // If there is some other source of T_GPFLT traps and the text at EIP is | |
687 // unreadable this code will loop infinitely until the stack is exausted. | |
688 // The key to diagnosis in this case is to look for the bottom signal handler | |
689 // frame. | |
690 | |
691 if(! IgnoreLibthreadGPFault) { | |
692 if (sig == SIGSEGV && uc->uc_mcontext.gregs[TRAPNO] == T_GPFLT) { | |
693 const unsigned char *p = | |
694 (unsigned const char *) uc->uc_mcontext.gregs[EIP]; | |
695 | |
696 // Expected instruction? | |
697 | |
698 if(p[0] == movlfs[0] && p[1] == movlfs[1]) { | |
699 | |
700 Atomic::inc(&ldtr_refresh); | |
701 | |
702 // Infinite loop? | |
703 | |
704 if(ldtr_refresh < ((2 << 16) / PAGESIZE)) { | |
705 | |
706 // No, force scheduling to get a fresh view of the LDTR | |
707 | |
708 if(poll(NULL, 0, 10) == 0) { | |
709 | |
710 // Retry the move | |
711 | |
712 return false; | |
713 } | |
714 } | |
715 } | |
716 } | |
717 } | |
718 #endif // !AMD64 | |
719 | |
720 if (!abort_if_unrecognized) { | |
721 // caller wants another chance, so give it to him | |
722 return false; | |
723 } | |
724 | |
725 if (!os::Solaris::libjsig_is_loaded) { | |
726 struct sigaction oldAct; | |
727 sigaction(sig, (struct sigaction *)0, &oldAct); | |
728 if (oldAct.sa_sigaction != signalHandler) { | |
729 void* sighand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) | |
730 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); | |
605 | 731 warning("Unexpected Signal %d occurred under user-defined signal handler %#lx", sig, (long)sighand); |
0 | 732 } |
733 } | |
734 | |
735 if (pc == NULL && uc != NULL) { | |
736 pc = (address) uc->uc_mcontext.gregs[REG_PC]; | |
737 } | |
738 | |
739 // unmask current signal | |
740 sigset_t newset; | |
741 sigemptyset(&newset); | |
742 sigaddset(&newset, sig); | |
743 sigprocmask(SIG_UNBLOCK, &newset, NULL); | |
744 | |
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745 // Determine which sort of error to throw. Out of swap may signal |
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746 // on the thread stack, which could get a mapping error when touched. |
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747 address addr = (address) info->si_addr; |
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748 if (sig == SIGBUS && info->si_code == BUS_OBJERR && info->si_errno == ENOMEM) { |
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749 vm_exit_out_of_memory(0, "Out of swap space to map in thread stack."); |
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750 } |
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751 |
0 | 752 VMError err(t, sig, pc, info, ucVoid); |
753 err.report_and_die(); | |
754 | |
755 ShouldNotReachHere(); | |
756 } | |
757 | |
758 void os::print_context(outputStream *st, void *context) { | |
759 if (context == NULL) return; | |
760 | |
761 ucontext_t *uc = (ucontext_t*)context; | |
762 st->print_cr("Registers:"); | |
763 #ifdef AMD64 | |
764 st->print( "RAX=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RAX]); | |
765 st->print(", RBX=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RBX]); | |
766 st->print(", RCX=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RCX]); | |
767 st->print(", RDX=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RDX]); | |
768 st->cr(); | |
769 st->print( "RSP=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RSP]); | |
770 st->print(", RBP=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RBP]); | |
771 st->print(", RSI=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RSI]); | |
772 st->print(", RDI=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RDI]); | |
773 st->cr(); | |
1907 | 774 st->print( "R8 =" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_R8]); |
775 st->print(", R9 =" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_R9]); | |
0 | 776 st->print(", R10=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_R10]); |
777 st->print(", R11=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_R11]); | |
1250 | 778 st->cr(); |
779 st->print( "R12=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_R12]); | |
0 | 780 st->print(", R13=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_R13]); |
781 st->print(", R14=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_R14]); | |
782 st->print(", R15=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_R15]); | |
783 st->cr(); | |
784 st->print( "RIP=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RIP]); | |
785 st->print(", RFLAGS=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RFL]); | |
786 #else | |
787 st->print( "EAX=" INTPTR_FORMAT, uc->uc_mcontext.gregs[EAX]); | |
788 st->print(", EBX=" INTPTR_FORMAT, uc->uc_mcontext.gregs[EBX]); | |
789 st->print(", ECX=" INTPTR_FORMAT, uc->uc_mcontext.gregs[ECX]); | |
790 st->print(", EDX=" INTPTR_FORMAT, uc->uc_mcontext.gregs[EDX]); | |
791 st->cr(); | |
792 st->print( "ESP=" INTPTR_FORMAT, uc->uc_mcontext.gregs[UESP]); | |
793 st->print(", EBP=" INTPTR_FORMAT, uc->uc_mcontext.gregs[EBP]); | |
794 st->print(", ESI=" INTPTR_FORMAT, uc->uc_mcontext.gregs[ESI]); | |
795 st->print(", EDI=" INTPTR_FORMAT, uc->uc_mcontext.gregs[EDI]); | |
796 st->cr(); | |
797 st->print( "EIP=" INTPTR_FORMAT, uc->uc_mcontext.gregs[EIP]); | |
798 st->print(", EFLAGS=" INTPTR_FORMAT, uc->uc_mcontext.gregs[EFL]); | |
799 #endif // AMD64 | |
800 st->cr(); | |
801 st->cr(); | |
802 | |
803 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc); | |
804 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp); | |
805 print_hex_dump(st, (address)sp, (address)(sp + 8*sizeof(intptr_t)), sizeof(intptr_t)); | |
806 st->cr(); | |
807 | |
808 // Note: it may be unsafe to inspect memory near pc. For example, pc may | |
809 // point to garbage if entry point in an nmethod is corrupted. Leave | |
810 // this at the end, and hope for the best. | |
811 ExtendedPC epc = os::Solaris::ucontext_get_ExtendedPC(uc); | |
812 address pc = epc.pc(); | |
813 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc); | |
1907 | 814 print_hex_dump(st, pc - 32, pc + 32, sizeof(char)); |
815 } | |
816 | |
817 void os::print_register_info(outputStream *st, void *context) { | |
818 if (context == NULL) return; | |
819 | |
820 ucontext_t *uc = (ucontext_t*)context; | |
821 | |
822 st->print_cr("Register to memory mapping:"); | |
823 st->cr(); | |
824 | |
825 // this is horrendously verbose but the layout of the registers in the | |
826 // context does not match how we defined our abstract Register set, so | |
827 // we can't just iterate through the gregs area | |
828 | |
829 // this is only for the "general purpose" registers | |
830 | |
831 #ifdef AMD64 | |
832 st->print("RAX="); print_location(st, uc->uc_mcontext.gregs[REG_RAX]); | |
833 st->print("RBX="); print_location(st, uc->uc_mcontext.gregs[REG_RBX]); | |
834 st->print("RCX="); print_location(st, uc->uc_mcontext.gregs[REG_RCX]); | |
835 st->print("RDX="); print_location(st, uc->uc_mcontext.gregs[REG_RDX]); | |
836 st->print("RSP="); print_location(st, uc->uc_mcontext.gregs[REG_RSP]); | |
837 st->print("RBP="); print_location(st, uc->uc_mcontext.gregs[REG_RBP]); | |
838 st->print("RSI="); print_location(st, uc->uc_mcontext.gregs[REG_RSI]); | |
839 st->print("RDI="); print_location(st, uc->uc_mcontext.gregs[REG_RDI]); | |
840 st->print("R8 ="); print_location(st, uc->uc_mcontext.gregs[REG_R8]); | |
841 st->print("R9 ="); print_location(st, uc->uc_mcontext.gregs[REG_R9]); | |
842 st->print("R10="); print_location(st, uc->uc_mcontext.gregs[REG_R10]); | |
843 st->print("R11="); print_location(st, uc->uc_mcontext.gregs[REG_R11]); | |
844 st->print("R12="); print_location(st, uc->uc_mcontext.gregs[REG_R12]); | |
845 st->print("R13="); print_location(st, uc->uc_mcontext.gregs[REG_R13]); | |
846 st->print("R14="); print_location(st, uc->uc_mcontext.gregs[REG_R14]); | |
847 st->print("R15="); print_location(st, uc->uc_mcontext.gregs[REG_R15]); | |
848 #else | |
849 st->print("EAX="); print_location(st, uc->uc_mcontext.gregs[EAX]); | |
850 st->print("EBX="); print_location(st, uc->uc_mcontext.gregs[EBX]); | |
851 st->print("ECX="); print_location(st, uc->uc_mcontext.gregs[ECX]); | |
852 st->print("EDX="); print_location(st, uc->uc_mcontext.gregs[EDX]); | |
853 st->print("ESP="); print_location(st, uc->uc_mcontext.gregs[UESP]); | |
854 st->print("EBP="); print_location(st, uc->uc_mcontext.gregs[EBP]); | |
855 st->print("ESI="); print_location(st, uc->uc_mcontext.gregs[ESI]); | |
856 st->print("EDI="); print_location(st, uc->uc_mcontext.gregs[EDI]); | |
857 #endif | |
858 | |
859 st->cr(); | |
0 | 860 } |
861 | |
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862 |
0 | 863 #ifdef AMD64 |
864 void os::Solaris::init_thread_fpu_state(void) { | |
865 // Nothing to do | |
866 } | |
867 #else | |
868 // From solaris_i486.s | |
869 extern "C" void fixcw(); | |
870 | |
871 void os::Solaris::init_thread_fpu_state(void) { | |
872 // Set fpu to 53 bit precision. This happens too early to use a stub. | |
873 fixcw(); | |
874 } | |
875 | |
876 // These routines are the initial value of atomic_xchg_entry(), | |
877 // atomic_cmpxchg_entry(), atomic_inc_entry() and fence_entry() | |
878 // until initialization is complete. | |
879 // TODO - replace with .il implementation when compiler supports it. | |
880 | |
881 typedef jint xchg_func_t (jint, volatile jint*); | |
882 typedef jint cmpxchg_func_t (jint, volatile jint*, jint); | |
883 typedef jlong cmpxchg_long_func_t(jlong, volatile jlong*, jlong); | |
884 typedef jint add_func_t (jint, volatile jint*); | |
885 | |
886 jint os::atomic_xchg_bootstrap(jint exchange_value, volatile jint* dest) { | |
887 // try to use the stub: | |
888 xchg_func_t* func = CAST_TO_FN_PTR(xchg_func_t*, StubRoutines::atomic_xchg_entry()); | |
889 | |
890 if (func != NULL) { | |
891 os::atomic_xchg_func = func; | |
892 return (*func)(exchange_value, dest); | |
893 } | |
894 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
895 | |
896 jint old_value = *dest; | |
897 *dest = exchange_value; | |
898 return old_value; | |
899 } | |
900 | |
901 jint os::atomic_cmpxchg_bootstrap(jint exchange_value, volatile jint* dest, jint compare_value) { | |
902 // try to use the stub: | |
903 cmpxchg_func_t* func = CAST_TO_FN_PTR(cmpxchg_func_t*, StubRoutines::atomic_cmpxchg_entry()); | |
904 | |
905 if (func != NULL) { | |
906 os::atomic_cmpxchg_func = func; | |
907 return (*func)(exchange_value, dest, compare_value); | |
908 } | |
909 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
910 | |
911 jint old_value = *dest; | |
912 if (old_value == compare_value) | |
913 *dest = exchange_value; | |
914 return old_value; | |
915 } | |
916 | |
917 jlong os::atomic_cmpxchg_long_bootstrap(jlong exchange_value, volatile jlong* dest, jlong compare_value) { | |
918 // try to use the stub: | |
919 cmpxchg_long_func_t* func = CAST_TO_FN_PTR(cmpxchg_long_func_t*, StubRoutines::atomic_cmpxchg_long_entry()); | |
920 | |
921 if (func != NULL) { | |
922 os::atomic_cmpxchg_long_func = func; | |
923 return (*func)(exchange_value, dest, compare_value); | |
924 } | |
925 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
926 | |
927 jlong old_value = *dest; | |
928 if (old_value == compare_value) | |
929 *dest = exchange_value; | |
930 return old_value; | |
931 } | |
932 | |
933 jint os::atomic_add_bootstrap(jint add_value, volatile jint* dest) { | |
934 // try to use the stub: | |
935 add_func_t* func = CAST_TO_FN_PTR(add_func_t*, StubRoutines::atomic_add_entry()); | |
936 | |
937 if (func != NULL) { | |
938 os::atomic_add_func = func; | |
939 return (*func)(add_value, dest); | |
940 } | |
941 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
942 | |
943 return (*dest) += add_value; | |
944 } | |
945 | |
946 xchg_func_t* os::atomic_xchg_func = os::atomic_xchg_bootstrap; | |
947 cmpxchg_func_t* os::atomic_cmpxchg_func = os::atomic_cmpxchg_bootstrap; | |
948 cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap; | |
949 add_func_t* os::atomic_add_func = os::atomic_add_bootstrap; | |
950 | |
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951 extern "C" void _solaris_raw_setup_fpu(address ptr); |
0 | 952 void os::setup_fpu() { |
953 address fpu_cntrl = StubRoutines::addr_fpu_cntrl_wrd_std(); | |
954 _solaris_raw_setup_fpu(fpu_cntrl); | |
955 } | |
956 #endif // AMD64 |