1 /*
2 * Copyright (c) 1999, 2009, 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 // do not include precompiled header file
26
27 # include <signal.h> // needed first to avoid name collision for "std" with SC 5.0
28
29 # include "incls/_os_solaris_sparc.cpp.incl"
30
31 // put OS-includes here
32 # include <sys/types.h>
33 # include <sys/mman.h>
34 # include <pthread.h>
35 # include <errno.h>
36 # include <dlfcn.h>
37 # include <stdio.h>
38 # include <unistd.h>
39 # include <sys/resource.h>
40 # include <thread.h>
41 # include <sys/stat.h>
42 # include <sys/time.h>
43 # include <sys/filio.h>
44 # include <sys/utsname.h>
45 # include <sys/systeminfo.h>
46 # include <sys/socket.h>
47 # include <sys/lwp.h>
48 # include <pwd.h>
49 # include <poll.h>
50 # include <sys/lwp.h>
51
52 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later
53 # include <sys/procfs.h> // see comment in <sys/procfs.h>
54
55 #define MAX_PATH (2 * K)
56
57 // Minimum stack size for the VM. It's easier to document a constant
58 // but it's different for x86 and sparc because the page sizes are different.
59 #ifdef _LP64
60 size_t os::Solaris::min_stack_allowed = 128*K;
61 #else
62 size_t os::Solaris::min_stack_allowed = 96*K;
63 #endif
64
65 int os::Solaris::max_register_window_saves_before_flushing() {
66 // We should detect this at run time. For now, filling
67 // in with a constant.
68 return 8;
69 }
70
71 static void handle_unflushed_register_windows(gwindows_t *win) {
72 int restore_count = win->wbcnt;
73 int i;
74
75 for(i=0; i<restore_count; i++) {
76 address sp = ((address)win->spbuf[i]) + STACK_BIAS;
77 address reg_win = (address)&win->wbuf[i];
78 memcpy(sp,reg_win,sizeof(struct rwindow));
79 }
80 }
81
82 char* os::non_memory_address_word() {
83 // Must never look like an address returned by reserve_memory,
84 // even in its subfields (as defined by the CPU immediate fields,
85 // if the CPU splits constants across multiple instructions).
86 // On SPARC, 0 != %hi(any real address), because there is no
87 // allocation in the first 1Kb of the virtual address space.
88 return (char*) 0;
89 }
90
91 // Validate a ucontext retrieved from walking a uc_link of a ucontext.
92 // There are issues with libthread giving out uc_links for different threads
93 // on the same uc_link chain and bad or circular links.
94 //
95 bool os::Solaris::valid_ucontext(Thread* thread, ucontext_t* valid, ucontext_t* suspect) {
96 if (valid >= suspect ||
97 valid->uc_stack.ss_flags != suspect->uc_stack.ss_flags ||
98 valid->uc_stack.ss_sp != suspect->uc_stack.ss_sp ||
99 valid->uc_stack.ss_size != suspect->uc_stack.ss_size) {
100 DEBUG_ONLY(tty->print_cr("valid_ucontext: failed test 1");)
101 return false;
102 }
103
104 if (thread->is_Java_thread()) {
105 if (!valid_stack_address(thread, (address)suspect)) {
106 DEBUG_ONLY(tty->print_cr("valid_ucontext: uc_link not in thread stack");)
107 return false;
108 }
109 address _sp = (address)((intptr_t)suspect->uc_mcontext.gregs[REG_SP] + STACK_BIAS);
110 if (!valid_stack_address(thread, _sp) ||
111 !frame::is_valid_stack_pointer(((JavaThread*)thread)->base_of_stack_pointer(), (intptr_t*)_sp)) {
112 DEBUG_ONLY(tty->print_cr("valid_ucontext: stackpointer not in thread stack");)
113 return false;
114 }
115 }
116 return true;
117 }
118
119 // We will only follow one level of uc_link since there are libthread
120 // issues with ucontext linking and it is better to be safe and just
121 // let caller retry later.
122 ucontext_t* os::Solaris::get_valid_uc_in_signal_handler(Thread *thread,
123 ucontext_t *uc) {
124
125 ucontext_t *retuc = NULL;
126
127 // Sometimes the topmost register windows are not properly flushed.
128 // i.e., if the kernel would have needed to take a page fault
129 if (uc != NULL && uc->uc_mcontext.gwins != NULL) {
130 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
131 }
132
133 if (uc != NULL) {
134 if (uc->uc_link == NULL) {
135 // cannot validate without uc_link so accept current ucontext
136 retuc = uc;
137 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) {
138 // first ucontext is valid so try the next one
139 uc = uc->uc_link;
140 if (uc->uc_link == NULL) {
141 // cannot validate without uc_link so accept current ucontext
142 retuc = uc;
143 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) {
144 // the ucontext one level down is also valid so return it
145 retuc = uc;
146 }
147 }
148 }
149 return retuc;
150 }
151
152 // Assumes ucontext is valid
153 ExtendedPC os::Solaris::ucontext_get_ExtendedPC(ucontext_t *uc) {
154 address pc = (address)uc->uc_mcontext.gregs[REG_PC];
155 // set npc to zero to avoid using it for safepoint, good for profiling only
156 return ExtendedPC(pc);
157 }
158
159 // Assumes ucontext is valid
160 intptr_t* os::Solaris::ucontext_get_sp(ucontext_t *uc) {
161 return (intptr_t*)((intptr_t)uc->uc_mcontext.gregs[REG_SP] + STACK_BIAS);
162 }
163
164 // Solaris X86 only
165 intptr_t* os::Solaris::ucontext_get_fp(ucontext_t *uc) {
166 ShouldNotReachHere();
167 return NULL;
168 }
169
170 // For Forte Analyzer AsyncGetCallTrace profiling support - thread
171 // is currently interrupted by SIGPROF.
172 //
173 // ret_fp parameter is only used by Solaris X86.
174 //
175 // The difference between this and os::fetch_frame_from_context() is that
176 // here we try to skip nested signal frames.
177 ExtendedPC os::Solaris::fetch_frame_from_ucontext(Thread* thread,
178 ucontext_t* uc, intptr_t** ret_sp, intptr_t** ret_fp) {
179
180 assert(thread != NULL, "just checking");
181 assert(ret_sp != NULL, "just checking");
182 assert(ret_fp == NULL, "just checking");
183
184 ucontext_t *luc = os::Solaris::get_valid_uc_in_signal_handler(thread, uc);
185
186 return os::fetch_frame_from_context(luc, ret_sp, ret_fp);
187 }
188
189
190 // ret_fp parameter is only used by Solaris X86.
191 ExtendedPC os::fetch_frame_from_context(void* ucVoid,
192 intptr_t** ret_sp, intptr_t** ret_fp) {
193
194 ExtendedPC epc;
195 ucontext_t *uc = (ucontext_t*)ucVoid;
196
197 if (uc != NULL) {
198 epc = os::Solaris::ucontext_get_ExtendedPC(uc);
199 if (ret_sp) *ret_sp = os::Solaris::ucontext_get_sp(uc);
200 } else {
201 // construct empty ExtendedPC for return value checking
202 epc = ExtendedPC(NULL);
203 if (ret_sp) *ret_sp = (intptr_t *)NULL;
204 }
205
206 return epc;
207 }
208
209 frame os::fetch_frame_from_context(void* ucVoid) {
210 intptr_t* sp;
211 intptr_t* fp;
212 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp);
213 return frame(sp, frame::unpatchable, epc.pc());
214 }
215
216 frame os::get_sender_for_C_frame(frame* fr) {
217 return frame(fr->sender_sp(), frame::unpatchable, fr->sender_pc());
218 }
219
220 frame os::current_frame() {
221 intptr_t* sp = StubRoutines::Sparc::flush_callers_register_windows_func()();
222 frame myframe(sp, frame::unpatchable,
223 CAST_FROM_FN_PTR(address, os::current_frame));
224 if (os::is_first_C_frame(&myframe)) {
225 // stack is not walkable
226 return frame(NULL, NULL, NULL);
227 } else {
228 return os::get_sender_for_C_frame(&myframe);
229 }
230 }
231
232
233 void GetThreadPC_Callback::execute(OSThread::InterruptArguments *args) {
234 Thread* thread = args->thread();
235 ucontext_t* uc = args->ucontext();
236 intptr_t* sp;
237
238 assert(ProfileVM && thread->is_VM_thread(), "just checking");
239
240 // Skip the mcontext corruption verification. If if occasionally
241 // things get corrupt, it is ok for profiling - we will just get an unresolved
242 // function name
243 ExtendedPC new_addr((address)uc->uc_mcontext.gregs[REG_PC]);
244 _addr = new_addr;
245 }
246
247
248 static int threadgetstate(thread_t tid, int *flags, lwpid_t *lwp, stack_t *ss, gregset_t rs, lwpstatus_t *lwpstatus) {
249 char lwpstatusfile[PROCFILE_LENGTH];
250 int lwpfd, err;
251
252 if (err = os::Solaris::thr_getstate(tid, flags, lwp, ss, rs))
253 return (err);
254 if (*flags == TRS_LWPID) {
255 sprintf(lwpstatusfile, "/proc/%d/lwp/%d/lwpstatus", getpid(),
256 *lwp);
257 if ((lwpfd = open(lwpstatusfile, O_RDONLY)) < 0) {
258 perror("thr_mutator_status: open lwpstatus");
259 return (EINVAL);
260 }
261 if (pread(lwpfd, lwpstatus, sizeof (lwpstatus_t), (off_t)0) !=
262 sizeof (lwpstatus_t)) {
263 perror("thr_mutator_status: read lwpstatus");
264 (void) close(lwpfd);
265 return (EINVAL);
266 }
267 (void) close(lwpfd);
268 }
269 return (0);
270 }
271
272
273 bool os::is_allocatable(size_t bytes) {
274 #ifdef _LP64
275 return true;
276 #else
277 return (bytes <= (size_t)3835*M);
278 #endif
279 }
280
281 extern "C" void Fetch32PFI () ;
282 extern "C" void Fetch32Resume () ;
283 extern "C" void FetchNPFI () ;
284 extern "C" void FetchNResume () ;
285
286 extern "C" int JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext, int abort_if_unrecognized);
287
288 int JVM_handle_solaris_signal(int sig, siginfo_t* info, void* ucVoid, int abort_if_unrecognized) {
289 ucontext_t* uc = (ucontext_t*) ucVoid;
290
291 Thread* t = ThreadLocalStorage::get_thread_slow();
292
293 SignalHandlerMark shm(t);
294
295 if(sig == SIGPIPE || sig == SIGXFSZ) {
296 if (os::Solaris::chained_handler(sig, info, ucVoid)) {
297 return true;
298 } else {
299 if (PrintMiscellaneous && (WizardMode || Verbose)) {
300 char buf[64];
301 warning("Ignoring %s - see 4229104 or 6499219",
302 os::exception_name(sig, buf, sizeof(buf)));
303
304 }
305 return true;
306 }
307 }
308
309 JavaThread* thread = NULL;
310 VMThread* vmthread = NULL;
311 if (os::Solaris::signal_handlers_are_installed) {
312 if (t != NULL ){
313 if(t->is_Java_thread()) {
314 thread = (JavaThread*)t;
315 }
316 else if(t->is_VM_thread()){
317 vmthread = (VMThread *)t;
318 }
319 }
320 }
321
322 guarantee(sig != os::Solaris::SIGinterrupt(), "Can not chain VM interrupt signal, try -XX:+UseAltSigs");
323
324 if (sig == os::Solaris::SIGasync()) {
325 if (thread) {
326 OSThread::InterruptArguments args(thread, uc);
327 thread->osthread()->do_interrupt_callbacks_at_interrupt(&args);
328 return true;
329 } else if (vmthread) {
330 OSThread::InterruptArguments args(vmthread, uc);
331 vmthread->osthread()->do_interrupt_callbacks_at_interrupt(&args);
332 return true;
333 } else if (os::Solaris::chained_handler(sig, info, ucVoid)) {
334 return true;
335 } else {
336 // If os::Solaris::SIGasync not chained, and this is a non-vm and
337 // non-java thread
338 return true;
339 }
340 }
341
342 if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) {
343 // can't decode this kind of signal
344 info = NULL;
345 } else {
346 assert(sig == info->si_signo, "bad siginfo");
347 }
348
349 // decide if this trap can be handled by a stub
350 address stub = NULL;
351
352 address pc = NULL;
353 address npc = NULL;
354
355 //%note os_trap_1
356 if (info != NULL && uc != NULL && thread != NULL) {
357 // factor me: getPCfromContext
358 pc = (address) uc->uc_mcontext.gregs[REG_PC];
359 npc = (address) uc->uc_mcontext.gregs[REG_nPC];
360
361 // SafeFetch() support
362 // Implemented with either a fixed set of addresses such
363 // as Fetch32*, or with Thread._OnTrap.
364 if (uc->uc_mcontext.gregs[REG_PC] == intptr_t(Fetch32PFI)) {
365 uc->uc_mcontext.gregs [REG_PC] = intptr_t(Fetch32Resume) ;
366 uc->uc_mcontext.gregs [REG_nPC] = intptr_t(Fetch32Resume) + 4 ;
367 return true ;
368 }
369 if (uc->uc_mcontext.gregs[REG_PC] == intptr_t(FetchNPFI)) {
370 uc->uc_mcontext.gregs [REG_PC] = intptr_t(FetchNResume) ;
371 uc->uc_mcontext.gregs [REG_nPC] = intptr_t(FetchNResume) + 4 ;
372 return true ;
373 }
374
375 // Handle ALL stack overflow variations here
376 if (sig == SIGSEGV && info->si_code == SEGV_ACCERR) {
377 address addr = (address) info->si_addr;
378 if (thread->in_stack_yellow_zone(addr)) {
379 thread->disable_stack_yellow_zone();
380 // Sometimes the register windows are not properly flushed.
381 if(uc->uc_mcontext.gwins != NULL) {
382 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
383 }
384 if (thread->thread_state() == _thread_in_Java) {
385 // Throw a stack overflow exception. Guard pages will be reenabled
386 // while unwinding the stack.
387 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW);
388 } else {
389 // Thread was in the vm or native code. Return and try to finish.
390 return true;
391 }
392 } else if (thread->in_stack_red_zone(addr)) {
393 // Fatal red zone violation. Disable the guard pages and fall through
394 // to handle_unexpected_exception way down below.
395 thread->disable_stack_red_zone();
396 tty->print_raw_cr("An irrecoverable stack overflow has occurred.");
397 // Sometimes the register windows are not properly flushed.
398 if(uc->uc_mcontext.gwins != NULL) {
399 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
400 }
401 }
402 }
403
404
405 if (thread->thread_state() == _thread_in_vm) {
406 if (sig == SIGBUS && info->si_code == BUS_OBJERR && thread->doing_unsafe_access()) {
407 stub = StubRoutines::handler_for_unsafe_access();
408 }
409 }
410
411 else if (thread->thread_state() == _thread_in_Java) {
412 // Java thread running in Java code => find exception handler if any
413 // a fault inside compiled code, the interpreter, or a stub
414
415 // Support Safepoint Polling
416 if ( sig == SIGSEGV && (address)info->si_addr == os::get_polling_page() ) {
417 stub = SharedRuntime::get_poll_stub(pc);
418 }
419
420 // Not needed on x86 solaris because verify_oops doesn't generate
421 // SEGV/BUS like sparc does.
422 if ( (sig == SIGSEGV || sig == SIGBUS)
423 && pc >= MacroAssembler::_verify_oop_implicit_branch[0]
424 && pc < MacroAssembler::_verify_oop_implicit_branch[1] ) {
425 stub = MacroAssembler::_verify_oop_implicit_branch[2];
426 warning("fixed up memory fault in +VerifyOops at address " INTPTR_FORMAT, info->si_addr);
427 }
428
429 // This is not factored because on x86 solaris the patching for
430 // zombies does not generate a SEGV.
431 else if (sig == SIGSEGV && nativeInstruction_at(pc)->is_zombie()) {
432 // zombie method (ld [%g0],%o7 instruction)
433 stub = SharedRuntime::get_handle_wrong_method_stub();
434
435 // At the stub it needs to look like a call from the caller of this
436 // method (not a call from the segv site).
437 pc = (address)uc->uc_mcontext.gregs[REG_O7];
438 }
439 else if (sig == SIGBUS && info->si_code == BUS_OBJERR) {
440 // BugId 4454115: A read from a MappedByteBuffer can fault
441 // here if the underlying file has been truncated.
442 // Do not crash the VM in such a case.
443 CodeBlob* cb = CodeCache::find_blob_unsafe(pc);
444 nmethod* nm = cb->is_nmethod() ? (nmethod*)cb : NULL;
445 if (nm != NULL && nm->has_unsafe_access()) {
446 stub = StubRoutines::handler_for_unsafe_access();
447 }
448 }
449
450 else if (sig == SIGFPE && info->si_code == FPE_INTDIV) {
451 // integer divide by zero
452 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO);
453 }
454 else if (sig == SIGFPE && info->si_code == FPE_FLTDIV) {
455 // floating-point divide by zero
456 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO);
457 }
458 #ifdef COMPILER2
459 else if (sig == SIGILL && nativeInstruction_at(pc)->is_ic_miss_trap()) {
460 #ifdef ASSERT
461 #ifdef TIERED
462 CodeBlob* cb = CodeCache::find_blob_unsafe(pc);
463 assert(cb->is_compiled_by_c2(), "Wrong compiler");
464 #endif // TIERED
465 #endif // ASSERT
466 // Inline cache missed and user trap "Tne G0+ST_RESERVED_FOR_USER_0+2" taken.
467 stub = SharedRuntime::get_ic_miss_stub();
468 // At the stub it needs to look like a call from the caller of this
469 // method (not a call from the segv site).
470 pc = (address)uc->uc_mcontext.gregs[REG_O7];
471 }
472 #endif // COMPILER2
473
474 else if (sig == SIGSEGV && info->si_code > 0 && !MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) {
475 // Determination of interpreter/vtable stub/compiled code null exception
476 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL);
477 }
478 }
479
480 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in
481 // and the heap gets shrunk before the field access.
482 if ((sig == SIGSEGV) || (sig == SIGBUS)) {
483 address addr = JNI_FastGetField::find_slowcase_pc(pc);
484 if (addr != (address)-1) {
485 stub = addr;
486 }
487 }
488
489 // Check to see if we caught the safepoint code in the
490 // process of write protecting the memory serialization page.
491 // It write enables the page immediately after protecting it
492 // so just return.
493 if ((sig == SIGSEGV) &&
494 os::is_memory_serialize_page(thread, (address)info->si_addr)) {
495 // Block current thread until the memory serialize page permission restored.
496 os::block_on_serialize_page_trap();
497 return true;
498 }
499 }
500
501 if (stub != NULL) {
502 // save all thread context in case we need to restore it
503
504 thread->set_saved_exception_pc(pc);
505 thread->set_saved_exception_npc(npc);
506
507 // simulate a branch to the stub (a "call" in the safepoint stub case)
508 // factor me: setPC
509 uc->uc_mcontext.gregs[REG_PC ] = (greg_t)stub;
510 uc->uc_mcontext.gregs[REG_nPC] = (greg_t)(stub + 4);
511
512 #ifndef PRODUCT
513 if (TraceJumps) thread->record_jump(stub, NULL, __FILE__, __LINE__);
514 #endif /* PRODUCT */
515
516 return true;
517 }
518
519 // signal-chaining
520 if (os::Solaris::chained_handler(sig, info, ucVoid)) {
521 return true;
522 }
523
524 if (!abort_if_unrecognized) {
525 // caller wants another chance, so give it to him
526 return false;
527 }
528
529 if (!os::Solaris::libjsig_is_loaded) {
530 struct sigaction oldAct;
531 sigaction(sig, (struct sigaction *)0, &oldAct);
532 if (oldAct.sa_sigaction != signalHandler) {
533 void* sighand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
534 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
535 warning("Unexpected Signal %d occurred under user-defined signal handler " INTPTR_FORMAT, sig, (intptr_t)sighand);
536 }
537 }
538
539 if (pc == NULL && uc != NULL) {
540 pc = (address) uc->uc_mcontext.gregs[REG_PC];
541 }
542
543 // unmask current signal
544 sigset_t newset;
545 sigemptyset(&newset);
546 sigaddset(&newset, sig);
547 sigprocmask(SIG_UNBLOCK, &newset, NULL);
548
549 VMError err(t, sig, pc, info, ucVoid);
550 err.report_and_die();
551
552 ShouldNotReachHere();
553 }
554
555 void os::print_context(outputStream *st, void *context) {
556 if (context == NULL) return;
557
558 ucontext_t *uc = (ucontext_t*)context;
559 st->print_cr("Registers:");
560
561 st->print_cr(" O0=" INTPTR_FORMAT " O1=" INTPTR_FORMAT
562 " O2=" INTPTR_FORMAT " O3=" INTPTR_FORMAT,
563 uc->uc_mcontext.gregs[REG_O0],
564 uc->uc_mcontext.gregs[REG_O1],
565 uc->uc_mcontext.gregs[REG_O2],
566 uc->uc_mcontext.gregs[REG_O3]);
567 st->print_cr(" O4=" INTPTR_FORMAT " O5=" INTPTR_FORMAT
568 " O6=" INTPTR_FORMAT " O7=" INTPTR_FORMAT,
569 uc->uc_mcontext.gregs[REG_O4],
570 uc->uc_mcontext.gregs[REG_O5],
571 uc->uc_mcontext.gregs[REG_O6],
572 uc->uc_mcontext.gregs[REG_O7]);
573
574 st->print_cr(" G1=" INTPTR_FORMAT " G2=" INTPTR_FORMAT
575 " G3=" INTPTR_FORMAT " G4=" INTPTR_FORMAT,
576 uc->uc_mcontext.gregs[REG_G1],
577 uc->uc_mcontext.gregs[REG_G2],
578 uc->uc_mcontext.gregs[REG_G3],
579 uc->uc_mcontext.gregs[REG_G4]);
580 st->print_cr(" G5=" INTPTR_FORMAT " G6=" INTPTR_FORMAT
581 " G7=" INTPTR_FORMAT " Y=" INTPTR_FORMAT,
582 uc->uc_mcontext.gregs[REG_G5],
583 uc->uc_mcontext.gregs[REG_G6],
584 uc->uc_mcontext.gregs[REG_G7],
585 uc->uc_mcontext.gregs[REG_Y]);
586
587 st->print_cr(" PC=" INTPTR_FORMAT " nPC=" INTPTR_FORMAT,
588 uc->uc_mcontext.gregs[REG_PC],
589 uc->uc_mcontext.gregs[REG_nPC]);
590
591 st->cr();
592 st->cr();
593
594 st->print_cr("Register to memory mapping:");
595 st->cr();
596
597 // this is only for the "general purpose" registers
598
599 st->print_cr("O0=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_O0]);
600 print_location(st, uc->uc_mcontext.gregs[REG_O0]);
601 st->cr();
602 st->print_cr("O1=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_O1]);
603 print_location(st, uc->uc_mcontext.gregs[REG_O1]);
604 st->cr();
605 st->print_cr("O2=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_O2]);
606 print_location(st, uc->uc_mcontext.gregs[REG_O2]);
607 st->cr();
608 st->print_cr("O3=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_O3]);
609 print_location(st, uc->uc_mcontext.gregs[REG_O3]);
610 st->cr();
611 st->print_cr("O4=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_O4]);
612 print_location(st, uc->uc_mcontext.gregs[REG_O4]);
613 st->cr();
614 st->print_cr("O5=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_O5]);
615 print_location(st, uc->uc_mcontext.gregs[REG_O5]);
616 st->cr();
617 st->print_cr("O6=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_O6]);
618 print_location(st, uc->uc_mcontext.gregs[REG_O6]);
619 st->cr();
620 st->print_cr("O7=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_O7]);
621 print_location(st, uc->uc_mcontext.gregs[REG_O7]);
622 st->cr();
623
624 st->print_cr("G1=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_G1]);
625 print_location(st, uc->uc_mcontext.gregs[REG_G1]);
626 st->cr();
627 st->print_cr("G2=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_G2]);
628 print_location(st, uc->uc_mcontext.gregs[REG_G2]);
629 st->cr();
630 st->print_cr("G3=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_G3]);
631 print_location(st, uc->uc_mcontext.gregs[REG_G3]);
632 st->cr();
633 st->print_cr("G4=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_G4]);
634 print_location(st, uc->uc_mcontext.gregs[REG_G4]);
635 st->cr();
636 st->print_cr("G5=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_G5]);
637 print_location(st, uc->uc_mcontext.gregs[REG_G5]);
638 st->cr();
639 st->print_cr("G6=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_G6]);
640 print_location(st, uc->uc_mcontext.gregs[REG_G6]);
641 st->cr();
642 st->print_cr("G7=" INTPTR_FORMAT, uc->uc_mcontext.gregs[REG_G7]);
643 print_location(st, uc->uc_mcontext.gregs[REG_G7]);
644
645 st->cr();
646 st->cr();
647
648 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc);
649 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp);
650 print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t));
651 st->cr();
652
653 // Note: it may be unsafe to inspect memory near pc. For example, pc may
654 // point to garbage if entry point in an nmethod is corrupted. Leave
655 // this at the end, and hope for the best.
656 ExtendedPC epc = os::Solaris::ucontext_get_ExtendedPC(uc);
657 address pc = epc.pc();
658 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc);
659 print_hex_dump(st, pc - 16, pc + 16, sizeof(char));
660 }
661
662 void os::Solaris::init_thread_fpu_state(void) {
663 // Nothing needed on Sparc.
664 }
665
666 #if !defined(COMPILER2) && !defined(_LP64)
667
668 // These routines are the initial value of atomic_xchg_entry(),
669 // atomic_cmpxchg_entry(), atomic_add_entry() and fence_entry()
670 // until initialization is complete.
671 // TODO - remove when the VM drops support for V8.
672
673 typedef jint xchg_func_t (jint, volatile jint*);
674 typedef jint cmpxchg_func_t (jint, volatile jint*, jint);
675 typedef jlong cmpxchg_long_func_t(jlong, volatile jlong*, jlong);
676 typedef jint add_func_t (jint, volatile jint*);
677
678 jint os::atomic_xchg_bootstrap(jint exchange_value, volatile jint* dest) {
679 // try to use the stub:
680 xchg_func_t* func = CAST_TO_FN_PTR(xchg_func_t*, StubRoutines::atomic_xchg_entry());
681
682 if (func != NULL) {
683 os::atomic_xchg_func = func;
684 return (*func)(exchange_value, dest);
685 }
686 assert(Threads::number_of_threads() == 0, "for bootstrap only");
687
688 jint old_value = *dest;
689 *dest = exchange_value;
690 return old_value;
691 }
692
693 jint os::atomic_cmpxchg_bootstrap(jint exchange_value, volatile jint* dest, jint compare_value) {
694 // try to use the stub:
695 cmpxchg_func_t* func = CAST_TO_FN_PTR(cmpxchg_func_t*, StubRoutines::atomic_cmpxchg_entry());
696
697 if (func != NULL) {
698 os::atomic_cmpxchg_func = func;
699 return (*func)(exchange_value, dest, compare_value);
700 }
701 assert(Threads::number_of_threads() == 0, "for bootstrap only");
702
703 jint old_value = *dest;
704 if (old_value == compare_value)
705 *dest = exchange_value;
706 return old_value;
707 }
708
709 jlong os::atomic_cmpxchg_long_bootstrap(jlong exchange_value, volatile jlong* dest, jlong compare_value) {
710 // try to use the stub:
711 cmpxchg_long_func_t* func = CAST_TO_FN_PTR(cmpxchg_long_func_t*, StubRoutines::atomic_cmpxchg_long_entry());
712
713 if (func != NULL) {
714 os::atomic_cmpxchg_long_func = func;
715 return (*func)(exchange_value, dest, compare_value);
716 }
717 assert(Threads::number_of_threads() == 0, "for bootstrap only");
718
719 jlong old_value = *dest;
720 if (old_value == compare_value)
721 *dest = exchange_value;
722 return old_value;
723 }
724
725 jint os::atomic_add_bootstrap(jint add_value, volatile jint* dest) {
726 // try to use the stub:
727 add_func_t* func = CAST_TO_FN_PTR(add_func_t*, StubRoutines::atomic_add_entry());
728
729 if (func != NULL) {
730 os::atomic_add_func = func;
731 return (*func)(add_value, dest);
732 }
733 assert(Threads::number_of_threads() == 0, "for bootstrap only");
734
735 return (*dest) += add_value;
736 }
737
738 xchg_func_t* os::atomic_xchg_func = os::atomic_xchg_bootstrap;
739 cmpxchg_func_t* os::atomic_cmpxchg_func = os::atomic_cmpxchg_bootstrap;
740 cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap;
741 add_func_t* os::atomic_add_func = os::atomic_add_bootstrap;
742
743 #endif // !_LP64 && !COMPILER2
744
745 #if defined(__sparc) && defined(COMPILER2) && defined(_GNU_SOURCE)
746 // See file build/solaris/makefiles/$compiler.make
747 // For compiler1 the architecture is v8 and frps isn't present in v8
748 extern "C" void _mark_fpu_nosave() {
749 __asm__ __volatile__ ("wr %%g0, 0, %%fprs \n\t" : : :);
750 }
751 #endif //defined(__sparc) && defined(COMPILER2)