1 /*
2 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 // no precompiled headers
26 #include "assembler_sparc.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_sparc.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
61
62
63 # include <signal.h> // needed first to avoid name collision for "std" with SC 5.0
64
65 // put OS-includes here
66 # include <sys/types.h>
67 # include <sys/mman.h>
68 # include <pthread.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/lwp.h>
82 # include <pwd.h>
83 # include <poll.h>
84 # include <sys/lwp.h>
85
86 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later
87 # include <sys/procfs.h> // see comment in <sys/procfs.h>
88
89 #define MAX_PATH (2 * K)
90
91 // Minimum stack size for the VM. It's easier to document a constant
92 // but it's different for x86 and sparc because the page sizes are different.
93 #ifdef _LP64
94 size_t os::Solaris::min_stack_allowed = 128*K;
95 #else
96 size_t os::Solaris::min_stack_allowed = 96*K;
97 #endif
98
99 int os::Solaris::max_register_window_saves_before_flushing() {
100 // We should detect this at run time. For now, filling
101 // in with a constant.
102 return 8;
103 }
104
105 static void handle_unflushed_register_windows(gwindows_t *win) {
106 int restore_count = win->wbcnt;
107 int i;
108
109 for(i=0; i<restore_count; i++) {
110 address sp = ((address)win->spbuf[i]) + STACK_BIAS;
111 address reg_win = (address)&win->wbuf[i];
112 memcpy(sp,reg_win,sizeof(struct rwindow));
113 }
114 }
115
116 char* os::non_memory_address_word() {
117 // Must never look like an address returned by reserve_memory,
118 // even in its subfields (as defined by the CPU immediate fields,
119 // if the CPU splits constants across multiple instructions).
120 // On SPARC, 0 != %hi(any real address), because there is no
121 // allocation in the first 1Kb of the virtual address space.
122 return (char*) 0;
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 address _sp = (address)((intptr_t)suspect->uc_mcontext.gregs[REG_SP] + STACK_BIAS);
144 if (!valid_stack_address(thread, _sp) ||
145 !frame::is_valid_stack_pointer(((JavaThread*)thread)->base_of_stack_pointer(), (intptr_t*)_sp)) {
146 DEBUG_ONLY(tty->print_cr("valid_ucontext: stackpointer not in thread stack");)
147 return false;
148 }
149 }
150 return true;
151 }
152
153 // We will only follow one level of uc_link since there are libthread
154 // issues with ucontext linking and it is better to be safe and just
155 // let caller retry later.
156 ucontext_t* os::Solaris::get_valid_uc_in_signal_handler(Thread *thread,
157 ucontext_t *uc) {
158
159 ucontext_t *retuc = NULL;
160
161 // Sometimes the topmost register windows are not properly flushed.
162 // i.e., if the kernel would have needed to take a page fault
163 if (uc != NULL && uc->uc_mcontext.gwins != NULL) {
164 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
165 }
166
167 if (uc != NULL) {
168 if (uc->uc_link == NULL) {
169 // cannot validate without uc_link so accept current ucontext
170 retuc = uc;
171 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) {
172 // first ucontext is valid so try the next one
173 uc = uc->uc_link;
174 if (uc->uc_link == NULL) {
175 // cannot validate without uc_link so accept current ucontext
176 retuc = uc;
177 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) {
178 // the ucontext one level down is also valid so return it
179 retuc = uc;
180 }
181 }
182 }
183 return retuc;
184 }
185
186 // Assumes ucontext is valid
187 ExtendedPC os::Solaris::ucontext_get_ExtendedPC(ucontext_t *uc) {
188 address pc = (address)uc->uc_mcontext.gregs[REG_PC];
189 // set npc to zero to avoid using it for safepoint, good for profiling only
190 return ExtendedPC(pc);
191 }
192
193 // Assumes ucontext is valid
194 intptr_t* os::Solaris::ucontext_get_sp(ucontext_t *uc) {
195 return (intptr_t*)((intptr_t)uc->uc_mcontext.gregs[REG_SP] + STACK_BIAS);
196 }
197
198 // Solaris X86 only
199 intptr_t* os::Solaris::ucontext_get_fp(ucontext_t *uc) {
200 ShouldNotReachHere();
201 return NULL;
202 }
203
204 // For Forte Analyzer AsyncGetCallTrace profiling support - thread
205 // is currently interrupted by SIGPROF.
206 //
207 // ret_fp parameter is only used by Solaris X86.
208 //
209 // The difference between this and os::fetch_frame_from_context() is that
210 // here we try to skip nested signal frames.
211 ExtendedPC os::Solaris::fetch_frame_from_ucontext(Thread* thread,
212 ucontext_t* uc, intptr_t** ret_sp, intptr_t** ret_fp) {
213
214 assert(thread != NULL, "just checking");
215 assert(ret_sp != NULL, "just checking");
216 assert(ret_fp == NULL, "just checking");
217
218 ucontext_t *luc = os::Solaris::get_valid_uc_in_signal_handler(thread, uc);
219
220 return os::fetch_frame_from_context(luc, ret_sp, ret_fp);
221 }
222
223
224 // ret_fp parameter is only used by Solaris X86.
225 ExtendedPC os::fetch_frame_from_context(void* ucVoid,
226 intptr_t** ret_sp, intptr_t** ret_fp) {
227
228 ExtendedPC epc;
229 ucontext_t *uc = (ucontext_t*)ucVoid;
230
231 if (uc != NULL) {
232 epc = os::Solaris::ucontext_get_ExtendedPC(uc);
233 if (ret_sp) *ret_sp = os::Solaris::ucontext_get_sp(uc);
234 } else {
235 // construct empty ExtendedPC for return value checking
236 epc = ExtendedPC(NULL);
237 if (ret_sp) *ret_sp = (intptr_t *)NULL;
238 }
239
240 return epc;
241 }
242
243 frame os::fetch_frame_from_context(void* ucVoid) {
244 intptr_t* sp;
245 intptr_t* fp;
246 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp);
247 return frame(sp, frame::unpatchable, epc.pc());
248 }
249
250 frame os::get_sender_for_C_frame(frame* fr) {
251 return frame(fr->sender_sp(), frame::unpatchable, fr->sender_pc());
252 }
253
254 frame os::current_frame() {
255 intptr_t* sp = StubRoutines::Sparc::flush_callers_register_windows_func()();
256 frame myframe(sp, frame::unpatchable,
257 CAST_FROM_FN_PTR(address, os::current_frame));
258 if (os::is_first_C_frame(&myframe)) {
259 // stack is not walkable
260 return frame(NULL, NULL, NULL);
261 } else {
262 return os::get_sender_for_C_frame(&myframe);
263 }
264 }
265
266
267 void GetThreadPC_Callback::execute(OSThread::InterruptArguments *args) {
268 Thread* thread = args->thread();
269 ucontext_t* uc = args->ucontext();
270 intptr_t* sp;
271
272 assert(ProfileVM && thread->is_VM_thread(), "just checking");
273
274 // Skip the mcontext corruption verification. If if occasionally
275 // things get corrupt, it is ok for profiling - we will just get an unresolved
276 // function name
277 ExtendedPC new_addr((address)uc->uc_mcontext.gregs[REG_PC]);
278 _addr = new_addr;
279 }
280
281
282 static int threadgetstate(thread_t tid, int *flags, lwpid_t *lwp, stack_t *ss, gregset_t rs, lwpstatus_t *lwpstatus) {
283 char lwpstatusfile[PROCFILE_LENGTH];
284 int lwpfd, err;
285
286 if (err = os::Solaris::thr_getstate(tid, flags, lwp, ss, rs))
287 return (err);
288 if (*flags == TRS_LWPID) {
289 sprintf(lwpstatusfile, "/proc/%d/lwp/%d/lwpstatus", getpid(),
290 *lwp);
291 if ((lwpfd = ::open(lwpstatusfile, O_RDONLY)) < 0) {
292 perror("thr_mutator_status: open lwpstatus");
293 return (EINVAL);
294 }
295 if (pread(lwpfd, lwpstatus, sizeof (lwpstatus_t), (off_t)0) !=
296 sizeof (lwpstatus_t)) {
297 perror("thr_mutator_status: read lwpstatus");
298 (void) ::close(lwpfd);
299 return (EINVAL);
300 }
301 (void) ::close(lwpfd);
302 }
303 return (0);
304 }
305
306
307 bool os::is_allocatable(size_t bytes) {
308 #ifdef _LP64
309 return true;
310 #else
311 return (bytes <= (size_t)3835*M);
312 #endif
313 }
314
315 extern "C" void Fetch32PFI () ;
316 extern "C" void Fetch32Resume () ;
317 extern "C" void FetchNPFI () ;
318 extern "C" void FetchNResume () ;
319
320 extern "C" JNIEXPORT int
321 JVM_handle_solaris_signal(int sig, siginfo_t* info, void* ucVoid,
322 int abort_if_unrecognized) {
323 ucontext_t* uc = (ucontext_t*) ucVoid;
324
325 Thread* t = ThreadLocalStorage::get_thread_slow();
326
327 SignalHandlerMark shm(t);
328
329 if(sig == SIGPIPE || sig == SIGXFSZ) {
330 if (os::Solaris::chained_handler(sig, info, ucVoid)) {
331 return true;
332 } else {
333 if (PrintMiscellaneous && (WizardMode || Verbose)) {
334 char buf[64];
335 warning("Ignoring %s - see 4229104 or 6499219",
336 os::exception_name(sig, buf, sizeof(buf)));
337
338 }
339 return true;
340 }
341 }
342
343 JavaThread* thread = NULL;
344 VMThread* vmthread = NULL;
345 if (os::Solaris::signal_handlers_are_installed) {
346 if (t != NULL ){
347 if(t->is_Java_thread()) {
348 thread = (JavaThread*)t;
349 }
350 else if(t->is_VM_thread()){
351 vmthread = (VMThread *)t;
352 }
353 }
354 }
355
356 guarantee(sig != os::Solaris::SIGinterrupt(), "Can not chain VM interrupt signal, try -XX:+UseAltSigs");
357
358 if (sig == os::Solaris::SIGasync()) {
359 if (thread) {
360 OSThread::InterruptArguments args(thread, uc);
361 thread->osthread()->do_interrupt_callbacks_at_interrupt(&args);
362 return true;
363 } else if (vmthread) {
364 OSThread::InterruptArguments args(vmthread, uc);
365 vmthread->osthread()->do_interrupt_callbacks_at_interrupt(&args);
366 return true;
367 } else if (os::Solaris::chained_handler(sig, info, ucVoid)) {
368 return true;
369 } else {
370 // If os::Solaris::SIGasync not chained, and this is a non-vm and
371 // non-java thread
372 return true;
373 }
374 }
375
376 if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) {
377 // can't decode this kind of signal
378 info = NULL;
379 } else {
380 assert(sig == info->si_signo, "bad siginfo");
381 }
382
383 // decide if this trap can be handled by a stub
384 address stub = NULL;
385
386 address pc = NULL;
387 address npc = NULL;
388
389 //%note os_trap_1
390 if (info != NULL && uc != NULL && thread != NULL) {
391 // factor me: getPCfromContext
392 pc = (address) uc->uc_mcontext.gregs[REG_PC];
393 npc = (address) uc->uc_mcontext.gregs[REG_nPC];
394
395 // SafeFetch() support
396 // Implemented with either a fixed set of addresses such
397 // as Fetch32*, or with Thread._OnTrap.
398 if (uc->uc_mcontext.gregs[REG_PC] == intptr_t(Fetch32PFI)) {
399 uc->uc_mcontext.gregs [REG_PC] = intptr_t(Fetch32Resume) ;
400 uc->uc_mcontext.gregs [REG_nPC] = intptr_t(Fetch32Resume) + 4 ;
401 return true ;
402 }
403 if (uc->uc_mcontext.gregs[REG_PC] == intptr_t(FetchNPFI)) {
404 uc->uc_mcontext.gregs [REG_PC] = intptr_t(FetchNResume) ;
405 uc->uc_mcontext.gregs [REG_nPC] = intptr_t(FetchNResume) + 4 ;
406 return true ;
407 }
408
409 // Handle ALL stack overflow variations here
410 if (sig == SIGSEGV && info->si_code == SEGV_ACCERR) {
411 address addr = (address) info->si_addr;
412 if (thread->in_stack_yellow_zone(addr)) {
413 thread->disable_stack_yellow_zone();
414 // Sometimes the register windows are not properly flushed.
415 if(uc->uc_mcontext.gwins != NULL) {
416 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
417 }
418 if (thread->thread_state() == _thread_in_Java) {
419 // Throw a stack overflow exception. Guard pages will be reenabled
420 // while unwinding the stack.
421 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW);
422 } else {
423 // Thread was in the vm or native code. Return and try to finish.
424 return true;
425 }
426 } else if (thread->in_stack_red_zone(addr)) {
427 // Fatal red zone violation. Disable the guard pages and fall through
428 // to handle_unexpected_exception way down below.
429 thread->disable_stack_red_zone();
430 tty->print_raw_cr("An irrecoverable stack overflow has occurred.");
431 // Sometimes the register windows are not properly flushed.
432 if(uc->uc_mcontext.gwins != NULL) {
433 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
434 }
435 }
436 }
437
438
439 if (thread->thread_state() == _thread_in_vm) {
440 if (sig == SIGBUS && info->si_code == BUS_OBJERR && thread->doing_unsafe_access()) {
441 stub = StubRoutines::handler_for_unsafe_access();
442 }
443 }
444
445 else if (thread->thread_state() == _thread_in_Java) {
446 // Java thread running in Java code => find exception handler if any
447 // a fault inside compiled code, the interpreter, or a stub
448
449 // Support Safepoint Polling
450 if ( sig == SIGSEGV && (address)info->si_addr == os::get_polling_page() ) {
451 stub = SharedRuntime::get_poll_stub(pc);
452 }
453
454 // Not needed on x86 solaris because verify_oops doesn't generate
455 // SEGV/BUS like sparc does.
456 if ( (sig == SIGSEGV || sig == SIGBUS)
457 && pc >= MacroAssembler::_verify_oop_implicit_branch[0]
458 && pc < MacroAssembler::_verify_oop_implicit_branch[1] ) {
459 stub = MacroAssembler::_verify_oop_implicit_branch[2];
460 warning("fixed up memory fault in +VerifyOops at address " INTPTR_FORMAT, info->si_addr);
461 }
462
463 // This is not factored because on x86 solaris the patching for
464 // zombies does not generate a SEGV.
465 else if (sig == SIGSEGV && nativeInstruction_at(pc)->is_zombie()) {
466 // zombie method (ld [%g0],%o7 instruction)
467 stub = SharedRuntime::get_handle_wrong_method_stub();
468
469 // At the stub it needs to look like a call from the caller of this
470 // method (not a call from the segv site).
471 pc = (address)uc->uc_mcontext.gregs[REG_O7];
472 }
473 else if (sig == SIGBUS && info->si_code == BUS_OBJERR) {
474 // BugId 4454115: A read from a MappedByteBuffer can fault
475 // here if the underlying file has been truncated.
476 // Do not crash the VM in such a case.
477 CodeBlob* cb = CodeCache::find_blob_unsafe(pc);
478 nmethod* nm = cb->is_nmethod() ? (nmethod*)cb : NULL;
479 if (nm != NULL && nm->has_unsafe_access()) {
480 stub = StubRoutines::handler_for_unsafe_access();
481 }
482 }
483
484 else if (sig == SIGFPE && info->si_code == FPE_INTDIV) {
485 // integer divide by zero
486 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO);
487 }
488 else if (sig == SIGFPE && info->si_code == FPE_FLTDIV) {
489 // floating-point divide by zero
490 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO);
491 }
492 #ifdef COMPILER2
493 else if (sig == SIGILL && nativeInstruction_at(pc)->is_ic_miss_trap()) {
494 #ifdef ASSERT
495 #ifdef TIERED
496 CodeBlob* cb = CodeCache::find_blob_unsafe(pc);
497 assert(cb->is_compiled_by_c2(), "Wrong compiler");
498 #endif // TIERED
499 #endif // ASSERT
500 // Inline cache missed and user trap "Tne G0+ST_RESERVED_FOR_USER_0+2" taken.
501 stub = SharedRuntime::get_ic_miss_stub();
502 // At the stub it needs to look like a call from the caller of this
503 // method (not a call from the segv site).
504 pc = (address)uc->uc_mcontext.gregs[REG_O7];
505 }
506 #endif // COMPILER2
507
508 else if (sig == SIGSEGV && info->si_code > 0 && !MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) {
509 // Determination of interpreter/vtable stub/compiled code null exception
510 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL);
511 }
512 }
513
514 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in
515 // and the heap gets shrunk before the field access.
516 if ((sig == SIGSEGV) || (sig == SIGBUS)) {
517 address addr = JNI_FastGetField::find_slowcase_pc(pc);
518 if (addr != (address)-1) {
519 stub = addr;
520 }
521 }
522
523 // Check to see if we caught the safepoint code in the
524 // process of write protecting the memory serialization page.
525 // It write enables the page immediately after protecting it
526 // so just return.
527 if ((sig == SIGSEGV) &&
528 os::is_memory_serialize_page(thread, (address)info->si_addr)) {
529 // Block current thread until the memory serialize page permission restored.
530 os::block_on_serialize_page_trap();
531 return true;
532 }
533 }
534
535 if (stub != NULL) {
536 // save all thread context in case we need to restore it
537
538 thread->set_saved_exception_pc(pc);
539 thread->set_saved_exception_npc(npc);
540
541 // simulate a branch to the stub (a "call" in the safepoint stub case)
542 // factor me: setPC
543 uc->uc_mcontext.gregs[REG_PC ] = (greg_t)stub;
544 uc->uc_mcontext.gregs[REG_nPC] = (greg_t)(stub + 4);
545
546 #ifndef PRODUCT
547 if (TraceJumps) thread->record_jump(stub, NULL, __FILE__, __LINE__);
548 #endif /* PRODUCT */
549
550 return true;
551 }
552
553 // signal-chaining
554 if (os::Solaris::chained_handler(sig, info, ucVoid)) {
555 return true;
556 }
557
558 if (!abort_if_unrecognized) {
559 // caller wants another chance, so give it to him
560 return false;
561 }
562
563 if (!os::Solaris::libjsig_is_loaded) {
564 struct sigaction oldAct;
565 sigaction(sig, (struct sigaction *)0, &oldAct);
566 if (oldAct.sa_sigaction != signalHandler) {
567 void* sighand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
568 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
569 warning("Unexpected Signal %d occurred under user-defined signal handler " INTPTR_FORMAT, sig, (intptr_t)sighand);
570 }
571 }
572
573 if (pc == NULL && uc != NULL) {
574 pc = (address) uc->uc_mcontext.gregs[REG_PC];
575 }
576
577 // Sometimes the register windows are not properly flushed.
578 if(uc->uc_mcontext.gwins != NULL) {
579 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
580 }
581
582 // unmask current signal
583 sigset_t newset;
584 sigemptyset(&newset);
585 sigaddset(&newset, sig);
586 sigprocmask(SIG_UNBLOCK, &newset, NULL);
587
588 // Determine which sort of error to throw. Out of swap may signal
589 // on the thread stack, which could get a mapping error when touched.
590 address addr = (address) info->si_addr;
591 if (sig == SIGBUS && info->si_code == BUS_OBJERR && info->si_errno == ENOMEM) {
592 vm_exit_out_of_memory(0, "Out of swap space to map in thread stack.");
593 }
594
595 VMError err(t, sig, pc, info, ucVoid);
596 err.report_and_die();
597
598 ShouldNotReachHere();
599 }
600
601 void os::print_context(outputStream *st, void *context) {
602 if (context == NULL) return;
603
604 ucontext_t *uc = (ucontext_t*)context;
605 st->print_cr("Registers:");
606
607 st->print_cr(" G1=" INTPTR_FORMAT " G2=" INTPTR_FORMAT
608 " G3=" INTPTR_FORMAT " G4=" INTPTR_FORMAT,
609 uc->uc_mcontext.gregs[REG_G1],
610 uc->uc_mcontext.gregs[REG_G2],
611 uc->uc_mcontext.gregs[REG_G3],
612 uc->uc_mcontext.gregs[REG_G4]);
613 st->print_cr(" G5=" INTPTR_FORMAT " G6=" INTPTR_FORMAT
614 " G7=" INTPTR_FORMAT " Y=" INTPTR_FORMAT,
615 uc->uc_mcontext.gregs[REG_G5],
616 uc->uc_mcontext.gregs[REG_G6],
617 uc->uc_mcontext.gregs[REG_G7],
618 uc->uc_mcontext.gregs[REG_Y]);
619 st->print_cr(" O0=" INTPTR_FORMAT " O1=" INTPTR_FORMAT
620 " O2=" INTPTR_FORMAT " O3=" INTPTR_FORMAT,
621 uc->uc_mcontext.gregs[REG_O0],
622 uc->uc_mcontext.gregs[REG_O1],
623 uc->uc_mcontext.gregs[REG_O2],
624 uc->uc_mcontext.gregs[REG_O3]);
625 st->print_cr(" O4=" INTPTR_FORMAT " O5=" INTPTR_FORMAT
626 " O6=" INTPTR_FORMAT " O7=" INTPTR_FORMAT,
627 uc->uc_mcontext.gregs[REG_O4],
628 uc->uc_mcontext.gregs[REG_O5],
629 uc->uc_mcontext.gregs[REG_O6],
630 uc->uc_mcontext.gregs[REG_O7]);
631
632
633 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc);
634 st->print_cr(" L0=" INTPTR_FORMAT " L1=" INTPTR_FORMAT
635 " L2=" INTPTR_FORMAT " L3=" INTPTR_FORMAT,
636 sp[L0->sp_offset_in_saved_window()],
637 sp[L1->sp_offset_in_saved_window()],
638 sp[L2->sp_offset_in_saved_window()],
639 sp[L3->sp_offset_in_saved_window()]);
640 st->print_cr(" L4=" INTPTR_FORMAT " L5=" INTPTR_FORMAT
641 " L6=" INTPTR_FORMAT " L7=" INTPTR_FORMAT,
642 sp[L4->sp_offset_in_saved_window()],
643 sp[L5->sp_offset_in_saved_window()],
644 sp[L6->sp_offset_in_saved_window()],
645 sp[L7->sp_offset_in_saved_window()]);
646 st->print_cr(" I0=" INTPTR_FORMAT " I1=" INTPTR_FORMAT
647 " I2=" INTPTR_FORMAT " I3=" INTPTR_FORMAT,
648 sp[I0->sp_offset_in_saved_window()],
649 sp[I1->sp_offset_in_saved_window()],
650 sp[I2->sp_offset_in_saved_window()],
651 sp[I3->sp_offset_in_saved_window()]);
652 st->print_cr(" I4=" INTPTR_FORMAT " I5=" INTPTR_FORMAT
653 " I6=" INTPTR_FORMAT " I7=" INTPTR_FORMAT,
654 sp[I4->sp_offset_in_saved_window()],
655 sp[I5->sp_offset_in_saved_window()],
656 sp[I6->sp_offset_in_saved_window()],
657 sp[I7->sp_offset_in_saved_window()]);
658
659 st->print_cr(" PC=" INTPTR_FORMAT " nPC=" INTPTR_FORMAT,
660 uc->uc_mcontext.gregs[REG_PC],
661 uc->uc_mcontext.gregs[REG_nPC]);
662 st->cr();
663 st->cr();
664
665 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp);
666 print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t));
667 st->cr();
668
669 // Note: it may be unsafe to inspect memory near pc. For example, pc may
670 // point to garbage if entry point in an nmethod is corrupted. Leave
671 // this at the end, and hope for the best.
672 ExtendedPC epc = os::Solaris::ucontext_get_ExtendedPC(uc);
673 address pc = epc.pc();
674 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc);
675 print_hex_dump(st, pc - 32, pc + 32, sizeof(char));
676 }
677
678 void os::print_register_info(outputStream *st, void *context) {
679 if (context == NULL) return;
680
681 ucontext_t *uc = (ucontext_t*)context;
682 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc);
683
684 st->print_cr("Register to memory mapping:");
685 st->cr();
686
687 // this is only for the "general purpose" registers
688 st->print("G1="); print_location(st, uc->uc_mcontext.gregs[REG_G1]);
689 st->print("G2="); print_location(st, uc->uc_mcontext.gregs[REG_G2]);
690 st->print("G3="); print_location(st, uc->uc_mcontext.gregs[REG_G3]);
691 st->print("G4="); print_location(st, uc->uc_mcontext.gregs[REG_G4]);
692 st->print("G5="); print_location(st, uc->uc_mcontext.gregs[REG_G5]);
693 st->print("G6="); print_location(st, uc->uc_mcontext.gregs[REG_G6]);
694 st->print("G7="); print_location(st, uc->uc_mcontext.gregs[REG_G7]);
695 st->cr();
696
697 st->print("O0="); print_location(st, uc->uc_mcontext.gregs[REG_O0]);
698 st->print("O1="); print_location(st, uc->uc_mcontext.gregs[REG_O1]);
699 st->print("O2="); print_location(st, uc->uc_mcontext.gregs[REG_O2]);
700 st->print("O3="); print_location(st, uc->uc_mcontext.gregs[REG_O3]);
701 st->print("O4="); print_location(st, uc->uc_mcontext.gregs[REG_O4]);
702 st->print("O5="); print_location(st, uc->uc_mcontext.gregs[REG_O5]);
703 st->print("O6="); print_location(st, uc->uc_mcontext.gregs[REG_O6]);
704 st->print("O7="); print_location(st, uc->uc_mcontext.gregs[REG_O7]);
705 st->cr();
706
707 st->print("L0="); print_location(st, sp[L0->sp_offset_in_saved_window()]);
708 st->print("L1="); print_location(st, sp[L1->sp_offset_in_saved_window()]);
709 st->print("L2="); print_location(st, sp[L2->sp_offset_in_saved_window()]);
710 st->print("L3="); print_location(st, sp[L3->sp_offset_in_saved_window()]);
711 st->print("L4="); print_location(st, sp[L4->sp_offset_in_saved_window()]);
712 st->print("L5="); print_location(st, sp[L5->sp_offset_in_saved_window()]);
713 st->print("L6="); print_location(st, sp[L6->sp_offset_in_saved_window()]);
714 st->print("L7="); print_location(st, sp[L7->sp_offset_in_saved_window()]);
715 st->cr();
716
717 st->print("I0="); print_location(st, sp[I0->sp_offset_in_saved_window()]);
718 st->print("I1="); print_location(st, sp[I1->sp_offset_in_saved_window()]);
719 st->print("I2="); print_location(st, sp[I2->sp_offset_in_saved_window()]);
720 st->print("I3="); print_location(st, sp[I3->sp_offset_in_saved_window()]);
721 st->print("I4="); print_location(st, sp[I4->sp_offset_in_saved_window()]);
722 st->print("I5="); print_location(st, sp[I5->sp_offset_in_saved_window()]);
723 st->print("I6="); print_location(st, sp[I6->sp_offset_in_saved_window()]);
724 st->print("I7="); print_location(st, sp[I7->sp_offset_in_saved_window()]);
725 st->cr();
726 }
727
728 void os::Solaris::init_thread_fpu_state(void) {
729 // Nothing needed on Sparc.
730 }
731
732 #if !defined(COMPILER2) && !defined(_LP64)
733
734 // These routines are the initial value of atomic_xchg_entry(),
735 // atomic_cmpxchg_entry(), atomic_add_entry() and fence_entry()
736 // until initialization is complete.
737 // TODO - remove when the VM drops support for V8.
738
739 typedef jint xchg_func_t (jint, volatile jint*);
740 typedef jint cmpxchg_func_t (jint, volatile jint*, jint);
741 typedef jlong cmpxchg_long_func_t(jlong, volatile jlong*, jlong);
742 typedef jint add_func_t (jint, volatile jint*);
743
744 jint os::atomic_xchg_bootstrap(jint exchange_value, volatile jint* dest) {
745 // try to use the stub:
746 xchg_func_t* func = CAST_TO_FN_PTR(xchg_func_t*, StubRoutines::atomic_xchg_entry());
747
748 if (func != NULL) {
749 os::atomic_xchg_func = func;
750 return (*func)(exchange_value, dest);
751 }
752 assert(Threads::number_of_threads() == 0, "for bootstrap only");
753
754 jint old_value = *dest;
755 *dest = exchange_value;
756 return old_value;
757 }
758
759 jint os::atomic_cmpxchg_bootstrap(jint exchange_value, volatile jint* dest, jint compare_value) {
760 // try to use the stub:
761 cmpxchg_func_t* func = CAST_TO_FN_PTR(cmpxchg_func_t*, StubRoutines::atomic_cmpxchg_entry());
762
763 if (func != NULL) {
764 os::atomic_cmpxchg_func = func;
765 return (*func)(exchange_value, dest, compare_value);
766 }
767 assert(Threads::number_of_threads() == 0, "for bootstrap only");
768
769 jint old_value = *dest;
770 if (old_value == compare_value)
771 *dest = exchange_value;
772 return old_value;
773 }
774
775 jlong os::atomic_cmpxchg_long_bootstrap(jlong exchange_value, volatile jlong* dest, jlong compare_value) {
776 // try to use the stub:
777 cmpxchg_long_func_t* func = CAST_TO_FN_PTR(cmpxchg_long_func_t*, StubRoutines::atomic_cmpxchg_long_entry());
778
779 if (func != NULL) {
780 os::atomic_cmpxchg_long_func = func;
781 return (*func)(exchange_value, dest, compare_value);
782 }
783 assert(Threads::number_of_threads() == 0, "for bootstrap only");
784
785 jlong old_value = *dest;
786 if (old_value == compare_value)
787 *dest = exchange_value;
788 return old_value;
789 }
790
791 jint os::atomic_add_bootstrap(jint add_value, volatile jint* dest) {
792 // try to use the stub:
793 add_func_t* func = CAST_TO_FN_PTR(add_func_t*, StubRoutines::atomic_add_entry());
794
795 if (func != NULL) {
796 os::atomic_add_func = func;
797 return (*func)(add_value, dest);
798 }
799 assert(Threads::number_of_threads() == 0, "for bootstrap only");
800
801 return (*dest) += add_value;
802 }
803
804 xchg_func_t* os::atomic_xchg_func = os::atomic_xchg_bootstrap;
805 cmpxchg_func_t* os::atomic_cmpxchg_func = os::atomic_cmpxchg_bootstrap;
806 cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap;
807 add_func_t* os::atomic_add_func = os::atomic_add_bootstrap;
808
809 #endif // !_LP64 && !COMPILER2
810
811 #if defined(__sparc) && defined(COMPILER2) && defined(_GNU_SOURCE)
812 // See file build/solaris/makefiles/$compiler.make
813 // For compiler1 the architecture is v8 and frps isn't present in v8
814 extern "C" void _mark_fpu_nosave() {
815 __asm__ __volatile__ ("wr %%g0, 0, %%fprs \n\t" : : :);
816 }
817 #endif //defined(__sparc) && defined(COMPILER2)