Mercurial > hg > truffle
annotate src/os_cpu/solaris_x86/vm/os_solaris_x86.cpp @ 1972:f95d63e2154a
6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg
author | stefank |
---|---|
date | Tue, 23 Nov 2010 13:22:55 -0800 |
parents | 1e9a9d2e6509 |
children | 828eafbd85cc |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2010, 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/hpi.hpp" | |
45 #include "runtime/interfaceSupport.hpp" | |
46 #include "runtime/java.hpp" | |
47 #include "runtime/javaCalls.hpp" | |
48 #include "runtime/mutexLocker.hpp" | |
49 #include "runtime/osThread.hpp" | |
50 #include "runtime/sharedRuntime.hpp" | |
51 #include "runtime/stubRoutines.hpp" | |
52 #include "runtime/timer.hpp" | |
53 #include "thread_solaris.inline.hpp" | |
54 #include "utilities/events.hpp" | |
55 #include "utilities/vmError.hpp" | |
56 #ifdef COMPILER1 | |
57 #include "c1/c1_Runtime1.hpp" | |
58 #endif | |
59 #ifdef COMPILER2 | |
60 #include "opto/runtime.hpp" | |
61 #endif | |
0 | 62 |
63 // put OS-includes here | |
64 # include <sys/types.h> | |
65 # include <sys/mman.h> | |
66 # include <pthread.h> | |
67 # include <signal.h> | |
68 # include <setjmp.h> | |
69 # include <errno.h> | |
70 # include <dlfcn.h> | |
71 # include <stdio.h> | |
72 # include <unistd.h> | |
73 # include <sys/resource.h> | |
74 # include <thread.h> | |
75 # include <sys/stat.h> | |
76 # include <sys/time.h> | |
77 # include <sys/filio.h> | |
78 # include <sys/utsname.h> | |
79 # include <sys/systeminfo.h> | |
80 # include <sys/socket.h> | |
81 # include <sys/trap.h> | |
82 # include <sys/lwp.h> | |
83 # include <pwd.h> | |
84 # include <poll.h> | |
85 # include <sys/lwp.h> | |
86 # include <procfs.h> // see comment in <sys/procfs.h> | |
87 | |
88 #ifndef AMD64 | |
89 // QQQ seems useless at this point | |
90 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later | |
91 #endif // AMD64 | |
92 # include <sys/procfs.h> // see comment in <sys/procfs.h> | |
93 | |
94 | |
95 #define MAX_PATH (2 * K) | |
96 | |
97 // Minimum stack size for the VM. It's easier to document a constant value | |
98 // but it's different for x86 and sparc because the page sizes are different. | |
99 #ifdef AMD64 | |
100 size_t os::Solaris::min_stack_allowed = 224*K; | |
101 #define REG_SP REG_RSP | |
102 #define REG_PC REG_RIP | |
103 #define REG_FP REG_RBP | |
104 #else | |
105 size_t os::Solaris::min_stack_allowed = 64*K; | |
106 #define REG_SP UESP | |
107 #define REG_PC EIP | |
108 #define REG_FP EBP | |
109 // 4900493 counter to prevent runaway LDTR refresh attempt | |
110 | |
111 static volatile int ldtr_refresh = 0; | |
112 // the libthread instruction that faults because of the stale LDTR | |
113 | |
114 static const unsigned char movlfs[] = { 0x8e, 0xe0 // movl %eax,%fs | |
115 }; | |
116 #endif // AMD64 | |
117 | |
118 char* os::non_memory_address_word() { | |
119 // Must never look like an address returned by reserve_memory, | |
120 // even in its subfields (as defined by the CPU immediate fields, | |
121 // if the CPU splits constants across multiple instructions). | |
122 return (char*) -1; | |
123 } | |
124 | |
125 // | |
126 // Validate a ucontext retrieved from walking a uc_link of a ucontext. | |
127 // There are issues with libthread giving out uc_links for different threads | |
128 // on the same uc_link chain and bad or circular links. | |
129 // | |
130 bool os::Solaris::valid_ucontext(Thread* thread, ucontext_t* valid, ucontext_t* suspect) { | |
131 if (valid >= suspect || | |
132 valid->uc_stack.ss_flags != suspect->uc_stack.ss_flags || | |
133 valid->uc_stack.ss_sp != suspect->uc_stack.ss_sp || | |
134 valid->uc_stack.ss_size != suspect->uc_stack.ss_size) { | |
135 DEBUG_ONLY(tty->print_cr("valid_ucontext: failed test 1");) | |
136 return false; | |
137 } | |
138 | |
139 if (thread->is_Java_thread()) { | |
140 if (!valid_stack_address(thread, (address)suspect)) { | |
141 DEBUG_ONLY(tty->print_cr("valid_ucontext: uc_link not in thread stack");) | |
142 return false; | |
143 } | |
144 if (!valid_stack_address(thread, (address) suspect->uc_mcontext.gregs[REG_SP])) { | |
145 DEBUG_ONLY(tty->print_cr("valid_ucontext: stackpointer not in thread stack");) | |
146 return false; | |
147 } | |
148 } | |
149 return true; | |
150 } | |
151 | |
152 // We will only follow one level of uc_link since there are libthread | |
153 // issues with ucontext linking and it is better to be safe and just | |
154 // let caller retry later. | |
155 ucontext_t* os::Solaris::get_valid_uc_in_signal_handler(Thread *thread, | |
156 ucontext_t *uc) { | |
157 | |
158 ucontext_t *retuc = NULL; | |
159 | |
160 if (uc != NULL) { | |
161 if (uc->uc_link == NULL) { | |
162 // cannot validate without uc_link so accept current ucontext | |
163 retuc = uc; | |
164 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) { | |
165 // first ucontext is valid so try the next one | |
166 uc = uc->uc_link; | |
167 if (uc->uc_link == NULL) { | |
168 // cannot validate without uc_link so accept current ucontext | |
169 retuc = uc; | |
170 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) { | |
171 // the ucontext one level down is also valid so return it | |
172 retuc = uc; | |
173 } | |
174 } | |
175 } | |
176 return retuc; | |
177 } | |
178 | |
179 // Assumes ucontext is valid | |
180 ExtendedPC os::Solaris::ucontext_get_ExtendedPC(ucontext_t *uc) { | |
181 return ExtendedPC((address)uc->uc_mcontext.gregs[REG_PC]); | |
182 } | |
183 | |
184 // Assumes ucontext is valid | |
185 intptr_t* os::Solaris::ucontext_get_sp(ucontext_t *uc) { | |
186 return (intptr_t*)uc->uc_mcontext.gregs[REG_SP]; | |
187 } | |
188 | |
189 // Assumes ucontext is valid | |
190 intptr_t* os::Solaris::ucontext_get_fp(ucontext_t *uc) { | |
191 return (intptr_t*)uc->uc_mcontext.gregs[REG_FP]; | |
192 } | |
193 | |
194 // For Forte Analyzer AsyncGetCallTrace profiling support - thread | |
195 // is currently interrupted by SIGPROF. | |
196 // | |
197 // The difference between this and os::fetch_frame_from_context() is that | |
198 // here we try to skip nested signal frames. | |
199 ExtendedPC os::Solaris::fetch_frame_from_ucontext(Thread* thread, | |
200 ucontext_t* uc, intptr_t** ret_sp, intptr_t** ret_fp) { | |
201 | |
202 assert(thread != NULL, "just checking"); | |
203 assert(ret_sp != NULL, "just checking"); | |
204 assert(ret_fp != NULL, "just checking"); | |
205 | |
206 ucontext_t *luc = os::Solaris::get_valid_uc_in_signal_handler(thread, uc); | |
207 return os::fetch_frame_from_context(luc, ret_sp, ret_fp); | |
208 } | |
209 | |
210 ExtendedPC os::fetch_frame_from_context(void* ucVoid, | |
211 intptr_t** ret_sp, intptr_t** ret_fp) { | |
212 | |
213 ExtendedPC epc; | |
214 ucontext_t *uc = (ucontext_t*)ucVoid; | |
215 | |
216 if (uc != NULL) { | |
217 epc = os::Solaris::ucontext_get_ExtendedPC(uc); | |
218 if (ret_sp) *ret_sp = os::Solaris::ucontext_get_sp(uc); | |
219 if (ret_fp) *ret_fp = os::Solaris::ucontext_get_fp(uc); | |
220 } else { | |
221 // construct empty ExtendedPC for return value checking | |
222 epc = ExtendedPC(NULL); | |
223 if (ret_sp) *ret_sp = (intptr_t *)NULL; | |
224 if (ret_fp) *ret_fp = (intptr_t *)NULL; | |
225 } | |
226 | |
227 return epc; | |
228 } | |
229 | |
230 frame os::fetch_frame_from_context(void* ucVoid) { | |
231 intptr_t* sp; | |
232 intptr_t* fp; | |
233 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp); | |
234 return frame(sp, fp, epc.pc()); | |
235 } | |
236 | |
237 frame os::get_sender_for_C_frame(frame* fr) { | |
238 return frame(fr->sender_sp(), fr->link(), fr->sender_pc()); | |
239 } | |
240 | |
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241 extern "C" intptr_t *_get_current_fp(); // in .il file |
0 | 242 |
243 frame os::current_frame() { | |
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244 intptr_t* fp = _get_current_fp(); // it's inlined so want current fp |
0 | 245 frame myframe((intptr_t*)os::current_stack_pointer(), |
246 (intptr_t*)fp, | |
247 CAST_FROM_FN_PTR(address, os::current_frame)); | |
248 if (os::is_first_C_frame(&myframe)) { | |
249 // stack is not walkable | |
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250 frame ret; // This will be a null useless frame |
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251 return ret; |
0 | 252 } else { |
253 return os::get_sender_for_C_frame(&myframe); | |
254 } | |
255 } | |
256 | |
257 // This is a simple callback that just fetches a PC for an interrupted thread. | |
258 // The thread need not be suspended and the fetched PC is just a hint. | |
259 // This one is currently used for profiling the VMThread ONLY! | |
260 | |
261 // Must be synchronous | |
262 void GetThreadPC_Callback::execute(OSThread::InterruptArguments *args) { | |
263 Thread* thread = args->thread(); | |
264 ucontext_t* uc = args->ucontext(); | |
265 intptr_t* sp; | |
266 | |
267 assert(ProfileVM && thread->is_VM_thread(), "just checking"); | |
268 | |
269 ExtendedPC new_addr((address)uc->uc_mcontext.gregs[REG_PC]); | |
270 _addr = new_addr; | |
271 } | |
272 | |
273 static int threadgetstate(thread_t tid, int *flags, lwpid_t *lwp, stack_t *ss, gregset_t rs, lwpstatus_t *lwpstatus) { | |
274 char lwpstatusfile[PROCFILE_LENGTH]; | |
275 int lwpfd, err; | |
276 | |
277 if (err = os::Solaris::thr_getstate(tid, flags, lwp, ss, rs)) | |
278 return (err); | |
279 if (*flags == TRS_LWPID) { | |
280 sprintf(lwpstatusfile, "/proc/%d/lwp/%d/lwpstatus", getpid(), | |
281 *lwp); | |
282 if ((lwpfd = open(lwpstatusfile, O_RDONLY)) < 0) { | |
283 perror("thr_mutator_status: open lwpstatus"); | |
284 return (EINVAL); | |
285 } | |
286 if (pread(lwpfd, lwpstatus, sizeof (lwpstatus_t), (off_t)0) != | |
287 sizeof (lwpstatus_t)) { | |
288 perror("thr_mutator_status: read lwpstatus"); | |
289 (void) close(lwpfd); | |
290 return (EINVAL); | |
291 } | |
292 (void) close(lwpfd); | |
293 } | |
294 return (0); | |
295 } | |
296 | |
297 #ifndef AMD64 | |
298 | |
299 // Detecting SSE support by OS | |
300 // From solaris_i486.s | |
301 extern "C" bool sse_check(); | |
302 extern "C" bool sse_unavailable(); | |
303 | |
304 enum { SSE_UNKNOWN, SSE_NOT_SUPPORTED, SSE_SUPPORTED}; | |
305 static int sse_status = SSE_UNKNOWN; | |
306 | |
307 | |
308 static void check_for_sse_support() { | |
309 if (!VM_Version::supports_sse()) { | |
310 sse_status = SSE_NOT_SUPPORTED; | |
311 return; | |
312 } | |
313 // looking for _sse_hw in libc.so, if it does not exist or | |
314 // the value (int) is 0, OS has no support for SSE | |
315 int *sse_hwp; | |
316 void *h; | |
317 | |
318 if ((h=dlopen("/usr/lib/libc.so", RTLD_LAZY)) == NULL) { | |
319 //open failed, presume no support for SSE | |
320 sse_status = SSE_NOT_SUPPORTED; | |
321 return; | |
322 } | |
323 if ((sse_hwp = (int *)dlsym(h, "_sse_hw")) == NULL) { | |
324 sse_status = SSE_NOT_SUPPORTED; | |
325 } else if (*sse_hwp == 0) { | |
326 sse_status = SSE_NOT_SUPPORTED; | |
327 } | |
328 dlclose(h); | |
329 | |
330 if (sse_status == SSE_UNKNOWN) { | |
331 bool (*try_sse)() = (bool (*)())sse_check; | |
332 sse_status = (*try_sse)() ? SSE_SUPPORTED : SSE_NOT_SUPPORTED; | |
333 } | |
334 | |
335 } | |
336 | |
585 | 337 #endif // AMD64 |
338 | |
0 | 339 bool os::supports_sse() { |
585 | 340 #ifdef AMD64 |
341 return true; | |
342 #else | |
0 | 343 if (sse_status == SSE_UNKNOWN) |
344 check_for_sse_support(); | |
345 return sse_status == SSE_SUPPORTED; | |
585 | 346 #endif // AMD64 |
0 | 347 } |
348 | |
349 bool os::is_allocatable(size_t bytes) { | |
350 #ifdef AMD64 | |
351 return true; | |
352 #else | |
353 | |
354 if (bytes < 2 * G) { | |
355 return true; | |
356 } | |
357 | |
358 char* addr = reserve_memory(bytes, NULL); | |
359 | |
360 if (addr != NULL) { | |
361 release_memory(addr, bytes); | |
362 } | |
363 | |
364 return addr != NULL; | |
365 #endif // AMD64 | |
366 | |
367 } | |
368 | |
369 extern "C" int JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext, int abort_if_unrecognized); | |
370 | |
371 extern "C" void Fetch32PFI () ; | |
372 extern "C" void Fetch32Resume () ; | |
373 #ifdef AMD64 | |
374 extern "C" void FetchNPFI () ; | |
375 extern "C" void FetchNResume () ; | |
376 #endif // AMD64 | |
377 | |
378 int JVM_handle_solaris_signal(int sig, siginfo_t* info, void* ucVoid, int abort_if_unrecognized) { | |
379 ucontext_t* uc = (ucontext_t*) ucVoid; | |
380 | |
381 #ifndef AMD64 | |
382 if (sig == SIGILL && info->si_addr == (caddr_t)sse_check) { | |
383 // the SSE instruction faulted. supports_sse() need return false. | |
384 uc->uc_mcontext.gregs[EIP] = (greg_t)sse_unavailable; | |
385 return true; | |
386 } | |
387 #endif // !AMD64 | |
388 | |
389 Thread* t = ThreadLocalStorage::get_thread_slow(); // slow & steady | |
390 | |
391 SignalHandlerMark shm(t); | |
392 | |
393 if(sig == SIGPIPE || sig == SIGXFSZ) { | |
394 if (os::Solaris::chained_handler(sig, info, ucVoid)) { | |
395 return true; | |
396 } else { | |
397 if (PrintMiscellaneous && (WizardMode || Verbose)) { | |
398 char buf[64]; | |
399 warning("Ignoring %s - see 4229104 or 6499219", | |
400 os::exception_name(sig, buf, sizeof(buf))); | |
401 | |
402 } | |
403 return true; | |
404 } | |
405 } | |
406 | |
407 JavaThread* thread = NULL; | |
408 VMThread* vmthread = NULL; | |
409 | |
410 if (os::Solaris::signal_handlers_are_installed) { | |
411 if (t != NULL ){ | |
412 if(t->is_Java_thread()) { | |
413 thread = (JavaThread*)t; | |
414 } | |
415 else if(t->is_VM_thread()){ | |
416 vmthread = (VMThread *)t; | |
417 } | |
418 } | |
419 } | |
420 | |
421 guarantee(sig != os::Solaris::SIGinterrupt(), "Can not chain VM interrupt signal, try -XX:+UseAltSigs"); | |
422 | |
423 if (sig == os::Solaris::SIGasync()) { | |
424 if(thread){ | |
425 OSThread::InterruptArguments args(thread, uc); | |
426 thread->osthread()->do_interrupt_callbacks_at_interrupt(&args); | |
427 return true; | |
428 } | |
429 else if(vmthread){ | |
430 OSThread::InterruptArguments args(vmthread, uc); | |
431 vmthread->osthread()->do_interrupt_callbacks_at_interrupt(&args); | |
432 return true; | |
433 } else if (os::Solaris::chained_handler(sig, info, ucVoid)) { | |
434 return true; | |
435 } else { | |
436 // If os::Solaris::SIGasync not chained, and this is a non-vm and | |
437 // non-java thread | |
438 return true; | |
439 } | |
440 } | |
441 | |
442 if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) { | |
443 // can't decode this kind of signal | |
444 info = NULL; | |
445 } else { | |
446 assert(sig == info->si_signo, "bad siginfo"); | |
447 } | |
448 | |
449 // decide if this trap can be handled by a stub | |
450 address stub = NULL; | |
451 | |
452 address pc = NULL; | |
453 | |
454 //%note os_trap_1 | |
455 if (info != NULL && uc != NULL && thread != NULL) { | |
456 // factor me: getPCfromContext | |
457 pc = (address) uc->uc_mcontext.gregs[REG_PC]; | |
458 | |
459 // SafeFetch32() support | |
460 if (pc == (address) Fetch32PFI) { | |
461 uc->uc_mcontext.gregs[REG_PC] = intptr_t(Fetch32Resume) ; | |
462 return true ; | |
463 } | |
464 #ifdef AMD64 | |
465 if (pc == (address) FetchNPFI) { | |
466 uc->uc_mcontext.gregs [REG_PC] = intptr_t(FetchNResume) ; | |
467 return true ; | |
468 } | |
469 #endif // AMD64 | |
470 | |
471 // Handle ALL stack overflow variations here | |
472 if (sig == SIGSEGV && info->si_code == SEGV_ACCERR) { | |
473 address addr = (address) info->si_addr; | |
474 if (thread->in_stack_yellow_zone(addr)) { | |
475 thread->disable_stack_yellow_zone(); | |
476 if (thread->thread_state() == _thread_in_Java) { | |
477 // Throw a stack overflow exception. Guard pages will be reenabled | |
478 // while unwinding the stack. | |
479 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW); | |
480 } else { | |
481 // Thread was in the vm or native code. Return and try to finish. | |
482 return true; | |
483 } | |
484 } else if (thread->in_stack_red_zone(addr)) { | |
485 // Fatal red zone violation. Disable the guard pages and fall through | |
486 // to handle_unexpected_exception way down below. | |
487 thread->disable_stack_red_zone(); | |
488 tty->print_raw_cr("An irrecoverable stack overflow has occurred."); | |
489 } | |
490 } | |
491 | |
492 if (thread->thread_state() == _thread_in_vm) { | |
493 if (sig == SIGBUS && info->si_code == BUS_OBJERR && thread->doing_unsafe_access()) { | |
494 stub = StubRoutines::handler_for_unsafe_access(); | |
495 } | |
496 } | |
497 | |
498 if (thread->thread_state() == _thread_in_Java) { | |
499 // Support Safepoint Polling | |
500 if ( sig == SIGSEGV && os::is_poll_address((address)info->si_addr)) { | |
501 stub = SharedRuntime::get_poll_stub(pc); | |
502 } | |
503 else if (sig == SIGBUS && info->si_code == BUS_OBJERR) { | |
504 // BugId 4454115: A read from a MappedByteBuffer can fault | |
505 // here if the underlying file has been truncated. | |
506 // Do not crash the VM in such a case. | |
507 CodeBlob* cb = CodeCache::find_blob_unsafe(pc); | |
508 nmethod* nm = cb->is_nmethod() ? (nmethod*)cb : NULL; | |
509 if (nm != NULL && nm->has_unsafe_access()) { | |
510 stub = StubRoutines::handler_for_unsafe_access(); | |
511 } | |
512 } | |
513 else | |
514 if (sig == SIGFPE && info->si_code == FPE_INTDIV) { | |
515 // integer divide by zero | |
516 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); | |
517 } | |
518 #ifndef AMD64 | |
519 else if (sig == SIGFPE && info->si_code == FPE_FLTDIV) { | |
520 // floating-point divide by zero | |
521 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); | |
522 } | |
523 else if (sig == SIGFPE && info->si_code == FPE_FLTINV) { | |
524 // The encoding of D2I in i486.ad can cause an exception prior | |
525 // to the fist instruction if there was an invalid operation | |
526 // pending. We want to dismiss that exception. From the win_32 | |
527 // side it also seems that if it really was the fist causing | |
528 // the exception that we do the d2i by hand with different | |
529 // rounding. Seems kind of weird. QQQ TODO | |
530 // Note that we take the exception at the NEXT floating point instruction. | |
531 if (pc[0] == 0xDB) { | |
532 assert(pc[0] == 0xDB, "not a FIST opcode"); | |
533 assert(pc[1] == 0x14, "not a FIST opcode"); | |
534 assert(pc[2] == 0x24, "not a FIST opcode"); | |
535 return true; | |
536 } else { | |
537 assert(pc[-3] == 0xDB, "not an flt invalid opcode"); | |
538 assert(pc[-2] == 0x14, "not an flt invalid opcode"); | |
539 assert(pc[-1] == 0x24, "not an flt invalid opcode"); | |
540 } | |
541 } | |
542 else if (sig == SIGFPE ) { | |
543 tty->print_cr("caught SIGFPE, info 0x%x.", info->si_code); | |
544 } | |
545 #endif // !AMD64 | |
546 | |
547 // QQQ It doesn't seem that we need to do this on x86 because we should be able | |
548 // to return properly from the handler without this extra stuff on the back side. | |
549 | |
550 else if (sig == SIGSEGV && info->si_code > 0 && !MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) { | |
551 // Determination of interpreter/vtable stub/compiled code null exception | |
552 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); | |
553 } | |
554 } | |
555 | |
556 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in | |
557 // and the heap gets shrunk before the field access. | |
558 if ((sig == SIGSEGV) || (sig == SIGBUS)) { | |
559 address addr = JNI_FastGetField::find_slowcase_pc(pc); | |
560 if (addr != (address)-1) { | |
561 stub = addr; | |
562 } | |
563 } | |
564 | |
565 // Check to see if we caught the safepoint code in the | |
566 // process of write protecting the memory serialization page. | |
567 // It write enables the page immediately after protecting it | |
568 // so we can just return to retry the write. | |
569 if ((sig == SIGSEGV) && | |
570 os::is_memory_serialize_page(thread, (address)info->si_addr)) { | |
571 // Block current thread until the memory serialize page permission restored. | |
572 os::block_on_serialize_page_trap(); | |
573 return true; | |
574 } | |
575 } | |
576 | |
577 // Execution protection violation | |
578 // | |
579 // Preventative code for future versions of Solaris which may | |
580 // enable execution protection when running the 32-bit VM on AMD64. | |
581 // | |
582 // This should be kept as the last step in the triage. We don't | |
583 // have a dedicated trap number for a no-execute fault, so be | |
584 // conservative and allow other handlers the first shot. | |
585 // | |
586 // Note: We don't test that info->si_code == SEGV_ACCERR here. | |
587 // this si_code is so generic that it is almost meaningless; and | |
588 // the si_code for this condition may change in the future. | |
589 // Furthermore, a false-positive should be harmless. | |
590 if (UnguardOnExecutionViolation > 0 && | |
591 (sig == SIGSEGV || sig == SIGBUS) && | |
592 uc->uc_mcontext.gregs[TRAPNO] == T_PGFLT) { // page fault | |
593 int page_size = os::vm_page_size(); | |
594 address addr = (address) info->si_addr; | |
595 address pc = (address) uc->uc_mcontext.gregs[REG_PC]; | |
596 // Make sure the pc and the faulting address are sane. | |
597 // | |
598 // If an instruction spans a page boundary, and the page containing | |
599 // the beginning of the instruction is executable but the following | |
600 // page is not, the pc and the faulting address might be slightly | |
601 // different - we still want to unguard the 2nd page in this case. | |
602 // | |
603 // 15 bytes seems to be a (very) safe value for max instruction size. | |
604 bool pc_is_near_addr = | |
605 (pointer_delta((void*) addr, (void*) pc, sizeof(char)) < 15); | |
606 bool instr_spans_page_boundary = | |
607 (align_size_down((intptr_t) pc ^ (intptr_t) addr, | |
608 (intptr_t) page_size) > 0); | |
609 | |
610 if (pc == addr || (pc_is_near_addr && instr_spans_page_boundary)) { | |
611 static volatile address last_addr = | |
612 (address) os::non_memory_address_word(); | |
613 | |
614 // In conservative mode, don't unguard unless the address is in the VM | |
615 if (addr != last_addr && | |
616 (UnguardOnExecutionViolation > 1 || os::address_is_in_vm(addr))) { | |
617 | |
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618 // Make memory rwx and retry |
0 | 619 address page_start = |
620 (address) align_size_down((intptr_t) addr, (intptr_t) page_size); | |
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621 bool res = os::protect_memory((char*) page_start, page_size, |
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622 os::MEM_PROT_RWX); |
0 | 623 |
624 if (PrintMiscellaneous && Verbose) { | |
625 char buf[256]; | |
626 jio_snprintf(buf, sizeof(buf), "Execution protection violation " | |
627 "at " INTPTR_FORMAT | |
628 ", unguarding " INTPTR_FORMAT ": %s, errno=%d", addr, | |
629 page_start, (res ? "success" : "failed"), errno); | |
630 tty->print_raw_cr(buf); | |
631 } | |
632 stub = pc; | |
633 | |
634 // Set last_addr so if we fault again at the same address, we don't end | |
635 // up in an endless loop. | |
636 // | |
637 // There are two potential complications here. Two threads trapping at | |
638 // the same address at the same time could cause one of the threads to | |
639 // think it already unguarded, and abort the VM. Likely very rare. | |
640 // | |
641 // The other race involves two threads alternately trapping at | |
642 // different addresses and failing to unguard the page, resulting in | |
643 // an endless loop. This condition is probably even more unlikely than | |
644 // the first. | |
645 // | |
646 // Although both cases could be avoided by using locks or thread local | |
647 // last_addr, these solutions are unnecessary complication: this | |
648 // handler is a best-effort safety net, not a complete solution. It is | |
649 // disabled by default and should only be used as a workaround in case | |
650 // we missed any no-execute-unsafe VM code. | |
651 | |
652 last_addr = addr; | |
653 } | |
654 } | |
655 } | |
656 | |
657 if (stub != NULL) { | |
658 // save all thread context in case we need to restore it | |
659 | |
660 if (thread != NULL) thread->set_saved_exception_pc(pc); | |
661 // 12/02/99: On Sparc it appears that the full context is also saved | |
662 // but as yet, no one looks at or restores that saved context | |
663 // factor me: setPC | |
664 uc->uc_mcontext.gregs[REG_PC] = (greg_t)stub; | |
665 return true; | |
666 } | |
667 | |
668 // signal-chaining | |
669 if (os::Solaris::chained_handler(sig, info, ucVoid)) { | |
670 return true; | |
671 } | |
672 | |
673 #ifndef AMD64 | |
674 // Workaround (bug 4900493) for Solaris kernel bug 4966651. | |
675 // Handle an undefined selector caused by an attempt to assign | |
676 // fs in libthread getipriptr(). With the current libthread design every 512 | |
677 // thread creations the LDT for a private thread data structure is extended | |
678 // and thre is a hazard that and another thread attempting a thread creation | |
679 // will use a stale LDTR that doesn't reflect the structure's growth, | |
680 // causing a GP fault. | |
681 // Enforce the probable limit of passes through here to guard against an | |
682 // infinite loop if some other move to fs caused the GP fault. Note that | |
683 // this loop counter is ultimately a heuristic as it is possible for | |
684 // more than one thread to generate this fault at a time in an MP system. | |
685 // In the case of the loop count being exceeded or if the poll fails | |
686 // just fall through to a fatal error. | |
687 // If there is some other source of T_GPFLT traps and the text at EIP is | |
688 // unreadable this code will loop infinitely until the stack is exausted. | |
689 // The key to diagnosis in this case is to look for the bottom signal handler | |
690 // frame. | |
691 | |
692 if(! IgnoreLibthreadGPFault) { | |
693 if (sig == SIGSEGV && uc->uc_mcontext.gregs[TRAPNO] == T_GPFLT) { | |
694 const unsigned char *p = | |
695 (unsigned const char *) uc->uc_mcontext.gregs[EIP]; | |
696 | |
697 // Expected instruction? | |
698 | |
699 if(p[0] == movlfs[0] && p[1] == movlfs[1]) { | |
700 | |
701 Atomic::inc(&ldtr_refresh); | |
702 | |
703 // Infinite loop? | |
704 | |
705 if(ldtr_refresh < ((2 << 16) / PAGESIZE)) { | |
706 | |
707 // No, force scheduling to get a fresh view of the LDTR | |
708 | |
709 if(poll(NULL, 0, 10) == 0) { | |
710 | |
711 // Retry the move | |
712 | |
713 return false; | |
714 } | |
715 } | |
716 } | |
717 } | |
718 } | |
719 #endif // !AMD64 | |
720 | |
721 if (!abort_if_unrecognized) { | |
722 // caller wants another chance, so give it to him | |
723 return false; | |
724 } | |
725 | |
726 if (!os::Solaris::libjsig_is_loaded) { | |
727 struct sigaction oldAct; | |
728 sigaction(sig, (struct sigaction *)0, &oldAct); | |
729 if (oldAct.sa_sigaction != signalHandler) { | |
730 void* sighand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) | |
731 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); | |
605 | 732 warning("Unexpected Signal %d occurred under user-defined signal handler %#lx", sig, (long)sighand); |
0 | 733 } |
734 } | |
735 | |
736 if (pc == NULL && uc != NULL) { | |
737 pc = (address) uc->uc_mcontext.gregs[REG_PC]; | |
738 } | |
739 | |
740 // unmask current signal | |
741 sigset_t newset; | |
742 sigemptyset(&newset); | |
743 sigaddset(&newset, sig); | |
744 sigprocmask(SIG_UNBLOCK, &newset, NULL); | |
745 | |
746 VMError err(t, sig, pc, info, ucVoid); | |
747 err.report_and_die(); | |
748 | |
749 ShouldNotReachHere(); | |
750 } | |
751 | |
752 void os::print_context(outputStream *st, void *context) { | |
753 if (context == NULL) return; | |
754 | |
755 ucontext_t *uc = (ucontext_t*)context; | |
756 st->print_cr("Registers:"); | |
757 #ifdef AMD64 | |
758 st->print( "RAX=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RAX]); | |
759 st->print(", RBX=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RBX]); | |
760 st->print(", RCX=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RCX]); | |
761 st->print(", RDX=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RDX]); | |
762 st->cr(); | |
763 st->print( "RSP=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RSP]); | |
764 st->print(", RBP=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RBP]); | |
765 st->print(", RSI=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RSI]); | |
766 st->print(", RDI=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RDI]); | |
767 st->cr(); | |
1907 | 768 st->print( "R8 =" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_R8]); |
769 st->print(", R9 =" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_R9]); | |
0 | 770 st->print(", R10=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_R10]); |
771 st->print(", R11=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_R11]); | |
1250 | 772 st->cr(); |
773 st->print( "R12=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_R12]); | |
0 | 774 st->print(", R13=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_R13]); |
775 st->print(", R14=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_R14]); | |
776 st->print(", R15=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_R15]); | |
777 st->cr(); | |
778 st->print( "RIP=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RIP]); | |
779 st->print(", RFLAGS=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_RFL]); | |
780 #else | |
781 st->print( "EAX=" INTPTR_FORMAT, uc->uc_mcontext.gregs[EAX]); | |
782 st->print(", EBX=" INTPTR_FORMAT, uc->uc_mcontext.gregs[EBX]); | |
783 st->print(", ECX=" INTPTR_FORMAT, uc->uc_mcontext.gregs[ECX]); | |
784 st->print(", EDX=" INTPTR_FORMAT, uc->uc_mcontext.gregs[EDX]); | |
785 st->cr(); | |
786 st->print( "ESP=" INTPTR_FORMAT, uc->uc_mcontext.gregs[UESP]); | |
787 st->print(", EBP=" INTPTR_FORMAT, uc->uc_mcontext.gregs[EBP]); | |
788 st->print(", ESI=" INTPTR_FORMAT, uc->uc_mcontext.gregs[ESI]); | |
789 st->print(", EDI=" INTPTR_FORMAT, uc->uc_mcontext.gregs[EDI]); | |
790 st->cr(); | |
791 st->print( "EIP=" INTPTR_FORMAT, uc->uc_mcontext.gregs[EIP]); | |
792 st->print(", EFLAGS=" INTPTR_FORMAT, uc->uc_mcontext.gregs[EFL]); | |
793 #endif // AMD64 | |
794 st->cr(); | |
795 st->cr(); | |
796 | |
797 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc); | |
798 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp); | |
799 print_hex_dump(st, (address)sp, (address)(sp + 8*sizeof(intptr_t)), sizeof(intptr_t)); | |
800 st->cr(); | |
801 | |
802 // Note: it may be unsafe to inspect memory near pc. For example, pc may | |
803 // point to garbage if entry point in an nmethod is corrupted. Leave | |
804 // this at the end, and hope for the best. | |
805 ExtendedPC epc = os::Solaris::ucontext_get_ExtendedPC(uc); | |
806 address pc = epc.pc(); | |
807 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc); | |
1907 | 808 print_hex_dump(st, pc - 32, pc + 32, sizeof(char)); |
809 } | |
810 | |
811 void os::print_register_info(outputStream *st, void *context) { | |
812 if (context == NULL) return; | |
813 | |
814 ucontext_t *uc = (ucontext_t*)context; | |
815 | |
816 st->print_cr("Register to memory mapping:"); | |
817 st->cr(); | |
818 | |
819 // this is horrendously verbose but the layout of the registers in the | |
820 // context does not match how we defined our abstract Register set, so | |
821 // we can't just iterate through the gregs area | |
822 | |
823 // this is only for the "general purpose" registers | |
824 | |
825 #ifdef AMD64 | |
826 st->print("RAX="); print_location(st, uc->uc_mcontext.gregs[REG_RAX]); | |
827 st->print("RBX="); print_location(st, uc->uc_mcontext.gregs[REG_RBX]); | |
828 st->print("RCX="); print_location(st, uc->uc_mcontext.gregs[REG_RCX]); | |
829 st->print("RDX="); print_location(st, uc->uc_mcontext.gregs[REG_RDX]); | |
830 st->print("RSP="); print_location(st, uc->uc_mcontext.gregs[REG_RSP]); | |
831 st->print("RBP="); print_location(st, uc->uc_mcontext.gregs[REG_RBP]); | |
832 st->print("RSI="); print_location(st, uc->uc_mcontext.gregs[REG_RSI]); | |
833 st->print("RDI="); print_location(st, uc->uc_mcontext.gregs[REG_RDI]); | |
834 st->print("R8 ="); print_location(st, uc->uc_mcontext.gregs[REG_R8]); | |
835 st->print("R9 ="); print_location(st, uc->uc_mcontext.gregs[REG_R9]); | |
836 st->print("R10="); print_location(st, uc->uc_mcontext.gregs[REG_R10]); | |
837 st->print("R11="); print_location(st, uc->uc_mcontext.gregs[REG_R11]); | |
838 st->print("R12="); print_location(st, uc->uc_mcontext.gregs[REG_R12]); | |
839 st->print("R13="); print_location(st, uc->uc_mcontext.gregs[REG_R13]); | |
840 st->print("R14="); print_location(st, uc->uc_mcontext.gregs[REG_R14]); | |
841 st->print("R15="); print_location(st, uc->uc_mcontext.gregs[REG_R15]); | |
842 #else | |
843 st->print("EAX="); print_location(st, uc->uc_mcontext.gregs[EAX]); | |
844 st->print("EBX="); print_location(st, uc->uc_mcontext.gregs[EBX]); | |
845 st->print("ECX="); print_location(st, uc->uc_mcontext.gregs[ECX]); | |
846 st->print("EDX="); print_location(st, uc->uc_mcontext.gregs[EDX]); | |
847 st->print("ESP="); print_location(st, uc->uc_mcontext.gregs[UESP]); | |
848 st->print("EBP="); print_location(st, uc->uc_mcontext.gregs[EBP]); | |
849 st->print("ESI="); print_location(st, uc->uc_mcontext.gregs[ESI]); | |
850 st->print("EDI="); print_location(st, uc->uc_mcontext.gregs[EDI]); | |
851 #endif | |
852 | |
853 st->cr(); | |
0 | 854 } |
855 | |
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856 |
0 | 857 #ifdef AMD64 |
858 void os::Solaris::init_thread_fpu_state(void) { | |
859 // Nothing to do | |
860 } | |
861 #else | |
862 // From solaris_i486.s | |
863 extern "C" void fixcw(); | |
864 | |
865 void os::Solaris::init_thread_fpu_state(void) { | |
866 // Set fpu to 53 bit precision. This happens too early to use a stub. | |
867 fixcw(); | |
868 } | |
869 | |
870 // These routines are the initial value of atomic_xchg_entry(), | |
871 // atomic_cmpxchg_entry(), atomic_inc_entry() and fence_entry() | |
872 // until initialization is complete. | |
873 // TODO - replace with .il implementation when compiler supports it. | |
874 | |
875 typedef jint xchg_func_t (jint, volatile jint*); | |
876 typedef jint cmpxchg_func_t (jint, volatile jint*, jint); | |
877 typedef jlong cmpxchg_long_func_t(jlong, volatile jlong*, jlong); | |
878 typedef jint add_func_t (jint, volatile jint*); | |
879 | |
880 jint os::atomic_xchg_bootstrap(jint exchange_value, volatile jint* dest) { | |
881 // try to use the stub: | |
882 xchg_func_t* func = CAST_TO_FN_PTR(xchg_func_t*, StubRoutines::atomic_xchg_entry()); | |
883 | |
884 if (func != NULL) { | |
885 os::atomic_xchg_func = func; | |
886 return (*func)(exchange_value, dest); | |
887 } | |
888 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
889 | |
890 jint old_value = *dest; | |
891 *dest = exchange_value; | |
892 return old_value; | |
893 } | |
894 | |
895 jint os::atomic_cmpxchg_bootstrap(jint exchange_value, volatile jint* dest, jint compare_value) { | |
896 // try to use the stub: | |
897 cmpxchg_func_t* func = CAST_TO_FN_PTR(cmpxchg_func_t*, StubRoutines::atomic_cmpxchg_entry()); | |
898 | |
899 if (func != NULL) { | |
900 os::atomic_cmpxchg_func = func; | |
901 return (*func)(exchange_value, dest, compare_value); | |
902 } | |
903 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
904 | |
905 jint old_value = *dest; | |
906 if (old_value == compare_value) | |
907 *dest = exchange_value; | |
908 return old_value; | |
909 } | |
910 | |
911 jlong os::atomic_cmpxchg_long_bootstrap(jlong exchange_value, volatile jlong* dest, jlong compare_value) { | |
912 // try to use the stub: | |
913 cmpxchg_long_func_t* func = CAST_TO_FN_PTR(cmpxchg_long_func_t*, StubRoutines::atomic_cmpxchg_long_entry()); | |
914 | |
915 if (func != NULL) { | |
916 os::atomic_cmpxchg_long_func = func; | |
917 return (*func)(exchange_value, dest, compare_value); | |
918 } | |
919 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
920 | |
921 jlong old_value = *dest; | |
922 if (old_value == compare_value) | |
923 *dest = exchange_value; | |
924 return old_value; | |
925 } | |
926 | |
927 jint os::atomic_add_bootstrap(jint add_value, volatile jint* dest) { | |
928 // try to use the stub: | |
929 add_func_t* func = CAST_TO_FN_PTR(add_func_t*, StubRoutines::atomic_add_entry()); | |
930 | |
931 if (func != NULL) { | |
932 os::atomic_add_func = func; | |
933 return (*func)(add_value, dest); | |
934 } | |
935 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
936 | |
937 return (*dest) += add_value; | |
938 } | |
939 | |
940 xchg_func_t* os::atomic_xchg_func = os::atomic_xchg_bootstrap; | |
941 cmpxchg_func_t* os::atomic_cmpxchg_func = os::atomic_cmpxchg_bootstrap; | |
942 cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap; | |
943 add_func_t* os::atomic_add_func = os::atomic_add_bootstrap; | |
944 | |
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945 extern "C" void _solaris_raw_setup_fpu(address ptr); |
0 | 946 void os::setup_fpu() { |
947 address fpu_cntrl = StubRoutines::addr_fpu_cntrl_wrd_std(); | |
948 _solaris_raw_setup_fpu(fpu_cntrl); | |
949 } | |
950 #endif // AMD64 |