1 /*
2 * Copyright (c) 1999, 2015, 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 "asm/macroAssembler.hpp"
27 #include "macroAssembler_sparc.hpp"
28 #include "classfile/classLoader.hpp"
29 #include "classfile/systemDictionary.hpp"
30 #include "classfile/vmSymbols.hpp"
31 #include "code/codeCache.hpp"
32 #include "code/icBuffer.hpp"
33 #include "code/vtableStubs.hpp"
34 #include "interpreter/interpreter.hpp"
35 #include "jvm_solaris.h"
36 #include "memory/allocation.inline.hpp"
37 #include "mutex_solaris.inline.hpp"
38 #include "nativeInst_sparc.hpp"
39 #include "os_share_solaris.hpp"
40 #include "prims/jniFastGetField.hpp"
41 #include "prims/jvm.h"
42 #include "prims/jvm_misc.hpp"
43 #include "runtime/arguments.hpp"
44 #include "runtime/extendedPC.hpp"
45 #include "runtime/frame.inline.hpp"
46 #include "runtime/interfaceSupport.hpp"
47 #include "runtime/java.hpp"
48 #include "runtime/javaCalls.hpp"
49 #include "runtime/mutexLocker.hpp"
50 #include "runtime/osThread.hpp"
51 #include "runtime/sharedRuntime.hpp"
52 #include "runtime/stubRoutines.hpp"
53 #include "runtime/thread.inline.hpp"
54 #include "runtime/timer.hpp"
55 #include "utilities/events.hpp"
56 #include "utilities/vmError.hpp"
57
58 # include <signal.h> // needed first to avoid name collision for "std" with SC 5.0
59
60 // put OS-includes here
61 # include <sys/types.h>
62 # include <sys/mman.h>
63 # include <pthread.h>
64 # include <errno.h>
65 # include <dlfcn.h>
66 # include <stdio.h>
67 # include <unistd.h>
68 # include <sys/resource.h>
69 # include <thread.h>
70 # include <sys/stat.h>
71 # include <sys/time.h>
72 # include <sys/filio.h>
73 # include <sys/utsname.h>
74 # include <sys/systeminfo.h>
75 # include <sys/socket.h>
76 # include <sys/lwp.h>
77 # include <pwd.h>
78 # include <poll.h>
79 # include <sys/lwp.h>
80
81 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later
82 # include <sys/procfs.h> // see comment in <sys/procfs.h>
83
84 #define MAX_PATH (2 * K)
85
86 // Minimum stack size for the VM. It's easier to document a constant
87 // but it's different for x86 and sparc because the page sizes are different.
88 #ifdef _LP64
89 size_t os::Solaris::min_stack_allowed = 128*K;
90 #else
91 size_t os::Solaris::min_stack_allowed = 96*K;
92 #endif
93
94 int os::Solaris::max_register_window_saves_before_flushing() {
95 // We should detect this at run time. For now, filling
96 // in with a constant.
97 return 8;
98 }
99
100 static void handle_unflushed_register_windows(gwindows_t *win) {
101 int restore_count = win->wbcnt;
102 int i;
103
104 for(i=0; i<restore_count; i++) {
105 address sp = ((address)win->spbuf[i]) + STACK_BIAS;
106 address reg_win = (address)&win->wbuf[i];
107 memcpy(sp,reg_win,sizeof(struct rwindow));
108 }
109 }
110
111 char* os::non_memory_address_word() {
112 // Must never look like an address returned by reserve_memory,
113 // even in its subfields (as defined by the CPU immediate fields,
114 // if the CPU splits constants across multiple instructions).
115 // On SPARC, 0 != %hi(any real address), because there is no
116 // allocation in the first 1Kb of the virtual address space.
117 return (char*) 0;
118 }
119
120 // Validate a ucontext retrieved from walking a uc_link of a ucontext.
121 // There are issues with libthread giving out uc_links for different threads
122 // on the same uc_link chain and bad or circular links.
123 //
124 bool os::Solaris::valid_ucontext(Thread* thread, ucontext_t* valid, ucontext_t* suspect) {
125 if (valid >= suspect ||
126 valid->uc_stack.ss_flags != suspect->uc_stack.ss_flags ||
127 valid->uc_stack.ss_sp != suspect->uc_stack.ss_sp ||
128 valid->uc_stack.ss_size != suspect->uc_stack.ss_size) {
129 DEBUG_ONLY(tty->print_cr("valid_ucontext: failed test 1");)
130 return false;
131 }
132
133 if (thread->is_Java_thread()) {
134 if (!valid_stack_address(thread, (address)suspect)) {
135 DEBUG_ONLY(tty->print_cr("valid_ucontext: uc_link not in thread stack");)
136 return false;
137 }
138 address _sp = (address)((intptr_t)suspect->uc_mcontext.gregs[REG_SP] + STACK_BIAS);
139 if (!valid_stack_address(thread, _sp) ||
140 !frame::is_valid_stack_pointer(((JavaThread*)thread)->base_of_stack_pointer(), (intptr_t*)_sp)) {
141 DEBUG_ONLY(tty->print_cr("valid_ucontext: stackpointer not in thread stack");)
142 return false;
143 }
144 }
145 return true;
146 }
147
148 // We will only follow one level of uc_link since there are libthread
149 // issues with ucontext linking and it is better to be safe and just
150 // let caller retry later.
151 ucontext_t* os::Solaris::get_valid_uc_in_signal_handler(Thread *thread,
152 ucontext_t *uc) {
153
154 ucontext_t *retuc = NULL;
155
156 // Sometimes the topmost register windows are not properly flushed.
157 // i.e., if the kernel would have needed to take a page fault
158 if (uc != NULL && uc->uc_mcontext.gwins != NULL) {
159 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
160 }
161
162 if (uc != NULL) {
163 if (uc->uc_link == NULL) {
164 // cannot validate without uc_link so accept current ucontext
165 retuc = uc;
166 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) {
167 // first ucontext is valid so try the next one
168 uc = uc->uc_link;
169 if (uc->uc_link == NULL) {
170 // cannot validate without uc_link so accept current ucontext
171 retuc = uc;
172 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) {
173 // the ucontext one level down is also valid so return it
174 retuc = uc;
175 }
176 }
177 }
178 return retuc;
179 }
180
181 // Assumes ucontext is valid
182 ExtendedPC os::Solaris::ucontext_get_ExtendedPC(ucontext_t *uc) {
183 address pc = (address)uc->uc_mcontext.gregs[REG_PC];
184 // set npc to zero to avoid using it for safepoint, good for profiling only
185 return ExtendedPC(pc);
186 }
187
188 void os::Solaris::ucontext_set_pc(ucontext_t* uc, address pc) {
189 uc->uc_mcontext.gregs [REG_PC] = (greg_t) pc;
190 uc->uc_mcontext.gregs [REG_nPC] = (greg_t) (pc + 4);
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 address os::Solaris::ucontext_get_pc(ucontext_t *uc) {
205 return (address) uc->uc_mcontext.gregs[REG_PC];
206 }
207
208
209 // For Forte Analyzer AsyncGetCallTrace profiling support - thread
210 // is currently interrupted by SIGPROF.
211 //
212 // ret_fp parameter is only used by Solaris X86.
213 //
214 // The difference between this and os::fetch_frame_from_context() is that
215 // here we try to skip nested signal frames.
216 ExtendedPC os::Solaris::fetch_frame_from_ucontext(Thread* thread,
217 ucontext_t* uc, intptr_t** ret_sp, intptr_t** ret_fp) {
218
219 assert(thread != NULL, "just checking");
220 assert(ret_sp != NULL, "just checking");
221 assert(ret_fp == NULL, "just checking");
222
223 ucontext_t *luc = os::Solaris::get_valid_uc_in_signal_handler(thread, uc);
224
225 return os::fetch_frame_from_context(luc, ret_sp, ret_fp);
226 }
227
228
229 // ret_fp parameter is only used by Solaris X86.
230 ExtendedPC os::fetch_frame_from_context(void* ucVoid,
231 intptr_t** ret_sp, intptr_t** ret_fp) {
232
233 ExtendedPC epc;
234 ucontext_t *uc = (ucontext_t*)ucVoid;
235
236 if (uc != NULL) {
237 epc = os::Solaris::ucontext_get_ExtendedPC(uc);
238 if (ret_sp) *ret_sp = os::Solaris::ucontext_get_sp(uc);
239 } else {
240 // construct empty ExtendedPC for return value checking
241 epc = ExtendedPC(NULL);
242 if (ret_sp) *ret_sp = (intptr_t *)NULL;
243 }
244
245 return epc;
246 }
247
248 frame os::fetch_frame_from_context(void* ucVoid) {
249 intptr_t* sp;
250 intptr_t* fp;
251 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp);
252 return frame(sp, frame::unpatchable, epc.pc());
253 }
254
255 frame os::fetch_frame_from_ucontext(Thread* thread, void* ucVoid) {
256 intptr_t* sp;
257 ExtendedPC epc = os::Solaris::fetch_frame_from_ucontext(thread, (ucontext_t*)ucVoid, &sp, NULL);
258 return frame(sp, frame::unpatchable, epc.pc());
259 }
260
261 bool os::Solaris::get_frame_at_stack_banging_point(JavaThread* thread, ucontext_t* uc, frame* fr) {
262 address pc = (address) os::Solaris::ucontext_get_pc(uc);
263 if (Interpreter::contains(pc)) {
264 *fr = os::fetch_frame_from_ucontext(thread, uc);
265 assert(fr->safe_for_sender(thread), "Safety check");
266 } else {
267 // more complex code with compiled code
268 assert(!Interpreter::contains(pc), "Interpreted methods should have been handled above");
269 CodeBlob* cb = CodeCache::find_blob(pc);
270 if (cb == NULL || !cb->is_nmethod() || cb->is_frame_complete_at(pc)) {
271 // Not sure where the pc points to, fallback to default
272 // stack overflow handling
273 return false;
274 } else {
275 *fr = os::fetch_frame_from_ucontext(thread, uc);
276 //assert(fr->safe_for_sender(thread), "Safety check");
277 *fr = frame(fr->sender_sp(), frame::unpatchable, fr->sender_pc());
278 if (!fr->is_java_frame()) {
279 assert(fr->safe_for_sender(thread), "Safety check");
280 *fr = fr->java_sender();
281 }
282 }
283 }
284 return true;
285 }
286
287 frame os::get_sender_for_C_frame(frame* fr) {
288 return frame(fr->sender_sp(), frame::unpatchable, fr->sender_pc());
289 }
290
291 // Returns an estimate of the current stack pointer. Result must be guaranteed to
292 // point into the calling threads stack, and be no lower than the current stack
293 // pointer.
294 address os::current_stack_pointer() {
295 volatile int dummy;
296 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right
297 return sp;
298 }
299
300 frame os::current_frame() {
301 intptr_t* sp = StubRoutines::Sparc::flush_callers_register_windows_func()();
302 frame myframe(sp, frame::unpatchable,
303 CAST_FROM_FN_PTR(address, os::current_frame));
304 if (os::is_first_C_frame(&myframe)) {
305 // stack is not walkable
306 return frame(NULL, NULL, false);
307 } else {
308 return os::get_sender_for_C_frame(&myframe);
309 }
310 }
311
312 bool os::is_allocatable(size_t bytes) {
313 #ifdef _LP64
314 return true;
315 #else
316 return (bytes <= (size_t)3835*M);
317 #endif
318 }
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 // Must do this before SignalHandlerMark, if crash protection installed we will longjmp away
328 // (no destructors can be run)
329 os::WatcherThreadCrashProtection::check_crash_protection(sig, t);
330
331 SignalHandlerMark shm(t);
332
333 if(sig == SIGPIPE || sig == SIGXFSZ) {
334 if (os::Solaris::chained_handler(sig, info, ucVoid)) {
335 return true;
336 } else {
337 if (PrintMiscellaneous && (WizardMode || Verbose)) {
338 char buf[64];
339 warning("Ignoring %s - see 4229104 or 6499219",
340 os::exception_name(sig, buf, sizeof(buf)));
341
342 }
343 return true;
344 }
345 }
346
347 JavaThread* thread = NULL;
348 VMThread* vmthread = NULL;
349 if (os::Solaris::signal_handlers_are_installed) {
350 if (t != NULL ){
351 if(t->is_Java_thread()) {
352 thread = (JavaThread*)t;
353 }
354 else if(t->is_VM_thread()){
355 vmthread = (VMThread *)t;
356 }
357 }
358 }
359
360 guarantee(sig != os::Solaris::SIGinterrupt(), "Can not chain VM interrupt signal, try -XX:+UseAltSigs");
361
362 if (sig == os::Solaris::SIGasync()) {
363 if (thread || vmthread) {
364 OSThread::SR_handler(t, uc);
365 return true;
366 } else if (os::Solaris::chained_handler(sig, info, ucVoid)) {
367 return true;
368 } else {
369 // If os::Solaris::SIGasync not chained, and this is a non-vm and
370 // non-java thread
371 return true;
372 }
373 }
374
375 if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) {
376 // can't decode this kind of signal
377 info = NULL;
378 } else {
379 assert(sig == info->si_signo, "bad siginfo");
380 }
381
382 // decide if this trap can be handled by a stub
383 address stub = NULL;
384
385 address pc = NULL;
386 address npc = NULL;
387
388 //%note os_trap_1
389 if (info != NULL && uc != NULL && thread != NULL) {
390 // factor me: getPCfromContext
391 pc = (address) uc->uc_mcontext.gregs[REG_PC];
392 npc = (address) uc->uc_mcontext.gregs[REG_nPC];
393
394 // SafeFetch() support
395 if (StubRoutines::is_safefetch_fault(pc)) {
396 os::Solaris::ucontext_set_pc(uc, StubRoutines::continuation_for_safefetch_fault(pc));
397 return 1;
398 }
399
400 // Handle ALL stack overflow variations here
401 if (sig == SIGSEGV && info->si_code == SEGV_ACCERR) {
402 address addr = (address) info->si_addr;
403 if (thread->in_stack_yellow_zone(addr)) {
404 // Sometimes the register windows are not properly flushed.
405 if(uc->uc_mcontext.gwins != NULL) {
406 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
407 }
408 if (thread->thread_state() == _thread_in_Java) {
409 if (thread->in_stack_reserved_zone(addr)) {
410 frame fr;
411 if (os::Solaris::get_frame_at_stack_banging_point(thread, uc, &fr)) {
412 assert(fr.is_java_frame(), "Must be a Java frame");
413 frame activation = SharedRuntime::look_for_reserved_stack_annotated_method(thread, fr);
414 if (activation.sp() != NULL) {
415 thread->disable_stack_reserved_zone();
416 RegisterMap map(thread);
417 int frame_size = activation.frame_size(&map);
418 thread->set_reserved_stack_activation((intptr_t*)(((address)activation.sp()) - STACK_BIAS));
419 return true;
420 }
421 }
422 }
423 // Throw a stack overflow exception. Guard pages will be reenabled
424 // while unwinding the stack.
425 thread->disable_stack_yellow_zone();
426 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW);
427 } else {
428 // Thread was in the vm or native code. Return and try to finish.
429 thread->disable_stack_yellow_zone();
430 return true;
431 }
432 } else if (thread->in_stack_red_zone(addr)) {
433 // Fatal red zone violation. Disable the guard pages and fall through
434 // to handle_unexpected_exception way down below.
435 thread->disable_stack_red_zone();
436 tty->print_raw_cr("An irrecoverable stack overflow has occurred.");
437 // Sometimes the register windows are not properly flushed.
438 if(uc->uc_mcontext.gwins != NULL) {
439 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
440 }
441 }
442 }
443
444
445 if (thread->thread_state() == _thread_in_vm) {
446 if (sig == SIGBUS && info->si_code == BUS_OBJERR && thread->doing_unsafe_access()) {
447 stub = StubRoutines::handler_for_unsafe_access();
448 }
449 }
450
451 else if (thread->thread_state() == _thread_in_Java) {
452 // Java thread running in Java code => find exception handler if any
453 // a fault inside compiled code, the interpreter, or a stub
454
455 // Support Safepoint Polling
456 if ( sig == SIGSEGV && (address)info->si_addr == os::get_polling_page() ) {
457 stub = SharedRuntime::get_poll_stub(pc);
458 }
459
460 // Not needed on x86 solaris because verify_oops doesn't generate
461 // SEGV/BUS like sparc does.
462 if ( (sig == SIGSEGV || sig == SIGBUS)
463 && pc >= MacroAssembler::_verify_oop_implicit_branch[0]
464 && pc < MacroAssembler::_verify_oop_implicit_branch[1] ) {
465 stub = MacroAssembler::_verify_oop_implicit_branch[2];
466 warning("fixed up memory fault in +VerifyOops at address " INTPTR_FORMAT, info->si_addr);
467 }
468
469 // This is not factored because on x86 solaris the patching for
470 // zombies does not generate a SEGV.
471 else if (sig == SIGSEGV && nativeInstruction_at(pc)->is_zombie()) {
472 // zombie method (ld [%g0],%o7 instruction)
473 stub = SharedRuntime::get_handle_wrong_method_stub();
474
475 // At the stub it needs to look like a call from the caller of this
476 // method (not a call from the segv site).
477 pc = (address)uc->uc_mcontext.gregs[REG_O7];
478 }
479 else if (sig == SIGBUS && info->si_code == BUS_OBJERR) {
480 // BugId 4454115: A read from a MappedByteBuffer can fault
481 // here if the underlying file has been truncated.
482 // Do not crash the VM in such a case.
483 CodeBlob* cb = CodeCache::find_blob_unsafe(pc);
484 nmethod* nm = cb->is_nmethod() ? (nmethod*)cb : NULL;
485 if (nm != NULL && nm->has_unsafe_access()) {
486 stub = StubRoutines::handler_for_unsafe_access();
487 }
488 }
489
490 else if (sig == SIGFPE && info->si_code == FPE_INTDIV) {
491 // integer divide by zero
492 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO);
493 }
494 else if (sig == SIGFPE && info->si_code == FPE_FLTDIV) {
495 // floating-point divide by zero
496 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO);
497 }
498 #ifdef COMPILER2
499 else if (sig == SIGILL && nativeInstruction_at(pc)->is_ic_miss_trap()) {
500 #ifdef ASSERT
501 #ifdef TIERED
502 CodeBlob* cb = CodeCache::find_blob_unsafe(pc);
503 assert(cb->is_compiled_by_c2(), "Wrong compiler");
504 #endif // TIERED
505 #endif // ASSERT
506 // Inline cache missed and user trap "Tne G0+ST_RESERVED_FOR_USER_0+2" taken.
507 stub = SharedRuntime::get_ic_miss_stub();
508 // At the stub it needs to look like a call from the caller of this
509 // method (not a call from the segv site).
510 pc = (address)uc->uc_mcontext.gregs[REG_O7];
511 }
512 #endif // COMPILER2
513
514 else if (sig == SIGSEGV && info->si_code > 0 && !MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) {
515 // Determination of interpreter/vtable stub/compiled code null exception
516 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL);
517 }
518 }
519
520 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in
521 // and the heap gets shrunk before the field access.
522 if ((sig == SIGSEGV) || (sig == SIGBUS)) {
523 address addr = JNI_FastGetField::find_slowcase_pc(pc);
524 if (addr != (address)-1) {
525 stub = addr;
526 }
527 }
528
529 // Check to see if we caught the safepoint code in the
530 // process of write protecting the memory serialization page.
531 // It write enables the page immediately after protecting it
532 // so just return.
533 if ((sig == SIGSEGV) &&
534 os::is_memory_serialize_page(thread, (address)info->si_addr)) {
535 // Block current thread until the memory serialize page permission restored.
536 os::block_on_serialize_page_trap();
537 return true;
538 }
539 }
540
541 if (stub != NULL) {
542 // save all thread context in case we need to restore it
543
544 thread->set_saved_exception_pc(pc);
545 thread->set_saved_exception_npc(npc);
546
547 // simulate a branch to the stub (a "call" in the safepoint stub case)
548 // factor me: setPC
549 os::Solaris::ucontext_set_pc(uc, stub);
550
551 #ifndef PRODUCT
552 if (TraceJumps) thread->record_jump(stub, NULL, __FILE__, __LINE__);
553 #endif /* PRODUCT */
554
555 return true;
556 }
557
558 // signal-chaining
559 if (os::Solaris::chained_handler(sig, info, ucVoid)) {
560 return true;
561 }
562
563 if (!abort_if_unrecognized) {
564 // caller wants another chance, so give it to him
565 return false;
566 }
567
568 if (!os::Solaris::libjsig_is_loaded) {
569 struct sigaction oldAct;
570 sigaction(sig, (struct sigaction *)0, &oldAct);
571 if (oldAct.sa_sigaction != signalHandler) {
572 void* sighand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
573 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
574 warning("Unexpected Signal %d occurred under user-defined signal handler " INTPTR_FORMAT, sig, (intptr_t)sighand);
575 }
576 }
577
578 if (pc == NULL && uc != NULL) {
579 pc = (address) uc->uc_mcontext.gregs[REG_PC];
580 }
581
582 // Sometimes the register windows are not properly flushed.
583 if(uc->uc_mcontext.gwins != NULL) {
584 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
585 }
586
587 // unmask current signal
588 sigset_t newset;
589 sigemptyset(&newset);
590 sigaddset(&newset, sig);
591 sigprocmask(SIG_UNBLOCK, &newset, NULL);
592
593 // Determine which sort of error to throw. Out of swap may signal
594 // on the thread stack, which could get a mapping error when touched.
595 address addr = (address) info->si_addr;
596 if (sig == SIGBUS && info->si_code == BUS_OBJERR && info->si_errno == ENOMEM) {
597 vm_exit_out_of_memory(0, OOM_MMAP_ERROR, "Out of swap space to map in thread stack.");
598 }
599
600 VMError::report_and_die(t, sig, pc, info, ucVoid);
601
602 ShouldNotReachHere();
603 }
604
605 void os::print_context(outputStream *st, void *context) {
606 if (context == NULL) return;
607
608 ucontext_t *uc = (ucontext_t*)context;
609 st->print_cr("Registers:");
610
611 st->print_cr(" G1=" INTPTR_FORMAT " G2=" INTPTR_FORMAT
612 " G3=" INTPTR_FORMAT " G4=" INTPTR_FORMAT,
613 uc->uc_mcontext.gregs[REG_G1],
614 uc->uc_mcontext.gregs[REG_G2],
615 uc->uc_mcontext.gregs[REG_G3],
616 uc->uc_mcontext.gregs[REG_G4]);
617 st->print_cr(" G5=" INTPTR_FORMAT " G6=" INTPTR_FORMAT
618 " G7=" INTPTR_FORMAT " Y=" INTPTR_FORMAT,
619 uc->uc_mcontext.gregs[REG_G5],
620 uc->uc_mcontext.gregs[REG_G6],
621 uc->uc_mcontext.gregs[REG_G7],
622 uc->uc_mcontext.gregs[REG_Y]);
623 st->print_cr(" O0=" INTPTR_FORMAT " O1=" INTPTR_FORMAT
624 " O2=" INTPTR_FORMAT " O3=" INTPTR_FORMAT,
625 uc->uc_mcontext.gregs[REG_O0],
626 uc->uc_mcontext.gregs[REG_O1],
627 uc->uc_mcontext.gregs[REG_O2],
628 uc->uc_mcontext.gregs[REG_O3]);
629 st->print_cr(" O4=" INTPTR_FORMAT " O5=" INTPTR_FORMAT
630 " O6=" INTPTR_FORMAT " O7=" INTPTR_FORMAT,
631 uc->uc_mcontext.gregs[REG_O4],
632 uc->uc_mcontext.gregs[REG_O5],
633 uc->uc_mcontext.gregs[REG_O6],
634 uc->uc_mcontext.gregs[REG_O7]);
635
636
637 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc);
638 st->print_cr(" L0=" INTPTR_FORMAT " L1=" INTPTR_FORMAT
639 " L2=" INTPTR_FORMAT " L3=" INTPTR_FORMAT,
640 sp[L0->sp_offset_in_saved_window()],
641 sp[L1->sp_offset_in_saved_window()],
642 sp[L2->sp_offset_in_saved_window()],
643 sp[L3->sp_offset_in_saved_window()]);
644 st->print_cr(" L4=" INTPTR_FORMAT " L5=" INTPTR_FORMAT
645 " L6=" INTPTR_FORMAT " L7=" INTPTR_FORMAT,
646 sp[L4->sp_offset_in_saved_window()],
647 sp[L5->sp_offset_in_saved_window()],
648 sp[L6->sp_offset_in_saved_window()],
649 sp[L7->sp_offset_in_saved_window()]);
650 st->print_cr(" I0=" INTPTR_FORMAT " I1=" INTPTR_FORMAT
651 " I2=" INTPTR_FORMAT " I3=" INTPTR_FORMAT,
652 sp[I0->sp_offset_in_saved_window()],
653 sp[I1->sp_offset_in_saved_window()],
654 sp[I2->sp_offset_in_saved_window()],
655 sp[I3->sp_offset_in_saved_window()]);
656 st->print_cr(" I4=" INTPTR_FORMAT " I5=" INTPTR_FORMAT
657 " I6=" INTPTR_FORMAT " I7=" INTPTR_FORMAT,
658 sp[I4->sp_offset_in_saved_window()],
659 sp[I5->sp_offset_in_saved_window()],
660 sp[I6->sp_offset_in_saved_window()],
661 sp[I7->sp_offset_in_saved_window()]);
662
663 st->print_cr(" PC=" INTPTR_FORMAT " nPC=" INTPTR_FORMAT,
664 uc->uc_mcontext.gregs[REG_PC],
665 uc->uc_mcontext.gregs[REG_nPC]);
666 st->cr();
667 st->cr();
668
669 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp);
670 print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t));
671 st->cr();
672
673 // Note: it may be unsafe to inspect memory near pc. For example, pc may
674 // point to garbage if entry point in an nmethod is corrupted. Leave
675 // this at the end, and hope for the best.
676 ExtendedPC epc = os::Solaris::ucontext_get_ExtendedPC(uc);
677 address pc = epc.pc();
678 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc);
679 print_hex_dump(st, pc - 32, pc + 32, sizeof(char));
680 }
681
682 void os::print_register_info(outputStream *st, void *context) {
683 if (context == NULL) return;
684
685 ucontext_t *uc = (ucontext_t*)context;
686 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc);
687
688 st->print_cr("Register to memory mapping:");
689 st->cr();
690
691 // this is only for the "general purpose" registers
692 st->print("G1="); print_location(st, uc->uc_mcontext.gregs[REG_G1]);
693 st->print("G2="); print_location(st, uc->uc_mcontext.gregs[REG_G2]);
694 st->print("G3="); print_location(st, uc->uc_mcontext.gregs[REG_G3]);
695 st->print("G4="); print_location(st, uc->uc_mcontext.gregs[REG_G4]);
696 st->print("G5="); print_location(st, uc->uc_mcontext.gregs[REG_G5]);
697 st->print("G6="); print_location(st, uc->uc_mcontext.gregs[REG_G6]);
698 st->print("G7="); print_location(st, uc->uc_mcontext.gregs[REG_G7]);
699 st->cr();
700
701 st->print("O0="); print_location(st, uc->uc_mcontext.gregs[REG_O0]);
702 st->print("O1="); print_location(st, uc->uc_mcontext.gregs[REG_O1]);
703 st->print("O2="); print_location(st, uc->uc_mcontext.gregs[REG_O2]);
704 st->print("O3="); print_location(st, uc->uc_mcontext.gregs[REG_O3]);
705 st->print("O4="); print_location(st, uc->uc_mcontext.gregs[REG_O4]);
706 st->print("O5="); print_location(st, uc->uc_mcontext.gregs[REG_O5]);
707 st->print("O6="); print_location(st, uc->uc_mcontext.gregs[REG_O6]);
708 st->print("O7="); print_location(st, uc->uc_mcontext.gregs[REG_O7]);
709 st->cr();
710
711 st->print("L0="); print_location(st, sp[L0->sp_offset_in_saved_window()]);
712 st->print("L1="); print_location(st, sp[L1->sp_offset_in_saved_window()]);
713 st->print("L2="); print_location(st, sp[L2->sp_offset_in_saved_window()]);
714 st->print("L3="); print_location(st, sp[L3->sp_offset_in_saved_window()]);
715 st->print("L4="); print_location(st, sp[L4->sp_offset_in_saved_window()]);
716 st->print("L5="); print_location(st, sp[L5->sp_offset_in_saved_window()]);
717 st->print("L6="); print_location(st, sp[L6->sp_offset_in_saved_window()]);
718 st->print("L7="); print_location(st, sp[L7->sp_offset_in_saved_window()]);
719 st->cr();
720
721 st->print("I0="); print_location(st, sp[I0->sp_offset_in_saved_window()]);
722 st->print("I1="); print_location(st, sp[I1->sp_offset_in_saved_window()]);
723 st->print("I2="); print_location(st, sp[I2->sp_offset_in_saved_window()]);
724 st->print("I3="); print_location(st, sp[I3->sp_offset_in_saved_window()]);
725 st->print("I4="); print_location(st, sp[I4->sp_offset_in_saved_window()]);
726 st->print("I5="); print_location(st, sp[I5->sp_offset_in_saved_window()]);
727 st->print("I6="); print_location(st, sp[I6->sp_offset_in_saved_window()]);
728 st->print("I7="); print_location(st, sp[I7->sp_offset_in_saved_window()]);
729 st->cr();
730 }
731
732 void os::Solaris::init_thread_fpu_state(void) {
733 // Nothing needed on Sparc.
734 }
735
736 #if !defined(COMPILER2) && !defined(_LP64)
737
738 // These routines are the initial value of atomic_xchg_entry(),
739 // atomic_cmpxchg_entry(), atomic_add_entry() and fence_entry()
740 // until initialization is complete.
741 // TODO - remove when the VM drops support for V8.
742
743 typedef jint xchg_func_t (jint, volatile jint*);
744 typedef jint cmpxchg_func_t (jint, volatile jint*, jint);
745 typedef jlong cmpxchg_long_func_t(jlong, volatile jlong*, jlong);
746 typedef jint add_func_t (jint, volatile jint*);
747
748 jint os::atomic_xchg_bootstrap(jint exchange_value, volatile jint* dest) {
749 // try to use the stub:
750 xchg_func_t* func = CAST_TO_FN_PTR(xchg_func_t*, StubRoutines::atomic_xchg_entry());
751
752 if (func != NULL) {
753 os::atomic_xchg_func = func;
754 return (*func)(exchange_value, dest);
755 }
756 assert(Threads::number_of_threads() == 0, "for bootstrap only");
757
758 jint old_value = *dest;
759 *dest = exchange_value;
760 return old_value;
761 }
762
763 jint os::atomic_cmpxchg_bootstrap(jint exchange_value, volatile jint* dest, jint compare_value) {
764 // try to use the stub:
765 cmpxchg_func_t* func = CAST_TO_FN_PTR(cmpxchg_func_t*, StubRoutines::atomic_cmpxchg_entry());
766
767 if (func != NULL) {
768 os::atomic_cmpxchg_func = func;
769 return (*func)(exchange_value, dest, compare_value);
770 }
771 assert(Threads::number_of_threads() == 0, "for bootstrap only");
772
773 jint old_value = *dest;
774 if (old_value == compare_value)
775 *dest = exchange_value;
776 return old_value;
777 }
778
779 jlong os::atomic_cmpxchg_long_bootstrap(jlong exchange_value, volatile jlong* dest, jlong compare_value) {
780 // try to use the stub:
781 cmpxchg_long_func_t* func = CAST_TO_FN_PTR(cmpxchg_long_func_t*, StubRoutines::atomic_cmpxchg_long_entry());
782
783 if (func != NULL) {
784 os::atomic_cmpxchg_long_func = func;
785 return (*func)(exchange_value, dest, compare_value);
786 }
787 assert(Threads::number_of_threads() == 0, "for bootstrap only");
788
789 jlong old_value = *dest;
790 if (old_value == compare_value)
791 *dest = exchange_value;
792 return old_value;
793 }
794
795 jint os::atomic_add_bootstrap(jint add_value, volatile jint* dest) {
796 // try to use the stub:
797 add_func_t* func = CAST_TO_FN_PTR(add_func_t*, StubRoutines::atomic_add_entry());
798
799 if (func != NULL) {
800 os::atomic_add_func = func;
801 return (*func)(add_value, dest);
802 }
803 assert(Threads::number_of_threads() == 0, "for bootstrap only");
804
805 return (*dest) += add_value;
806 }
807
808 xchg_func_t* os::atomic_xchg_func = os::atomic_xchg_bootstrap;
809 cmpxchg_func_t* os::atomic_cmpxchg_func = os::atomic_cmpxchg_bootstrap;
810 cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap;
811 add_func_t* os::atomic_add_func = os::atomic_add_bootstrap;
812
813 #endif // !_LP64 && !COMPILER2
814
815 #if defined(__sparc) && defined(COMPILER2) && defined(_GNU_SOURCE)
816 // See file build/solaris/makefiles/$compiler.make
817 // For compiler1 the architecture is v8 and frps isn't present in v8
818 extern "C" void _mark_fpu_nosave() {
819 __asm__ __volatile__ ("wr %%g0, 0, %%fprs \n\t" : : :);
820 }
821 #endif //defined(__sparc) && defined(COMPILER2)
822
823 #ifndef PRODUCT
824 void os::verify_stack_alignment() {
825 }
826 #endif
827
828 int os::extra_bang_size_in_bytes() {
829 // SPARC does not require an additional stack bang.
830 return 0;
831 }