1 /*
2 * Copyright (c) 1999, 2016, 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 "nativeInst_sparc.hpp"
38 #include "os_share_solaris.hpp"
39 #include "prims/jniFastGetField.hpp"
40 #include "prims/jvm.h"
41 #include "prims/jvm_misc.hpp"
42 #include "runtime/arguments.hpp"
43 #include "runtime/extendedPC.hpp"
44 #include "runtime/frame.inline.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/thread.inline.hpp"
53 #include "runtime/timer.hpp"
54 #include "utilities/events.hpp"
55 #include "utilities/vmError.hpp"
56
57 # include <signal.h> // needed first to avoid name collision for "std" with SC 5.0
58
59 // put OS-includes here
60 # include <sys/types.h>
61 # include <sys/mman.h>
62 # include <pthread.h>
63 # include <errno.h>
64 # include <dlfcn.h>
65 # include <stdio.h>
66 # include <unistd.h>
67 # include <sys/resource.h>
68 # include <thread.h>
69 # include <sys/stat.h>
70 # include <sys/time.h>
71 # include <sys/filio.h>
72 # include <sys/utsname.h>
73 # include <sys/systeminfo.h>
74 # include <sys/socket.h>
75 # include <sys/lwp.h>
76 # include <poll.h>
77 # include <sys/lwp.h>
78
79 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later
80 # include <sys/procfs.h> // see comment in <sys/procfs.h>
81
82 #define MAX_PATH (2 * K)
83
84 // Minimum stack size for the VM. It's easier to document a constant
85 // but it's different for x86 and sparc because the page sizes are different.
86 #ifdef _LP64
87 size_t os::Posix::_compiler_thread_min_stack_allowed = 128 * K;
88 size_t os::Posix::_java_thread_min_stack_allowed = 128 * K;
89 size_t os::Posix::_vm_internal_thread_min_stack_allowed = 128 * K;
90 #else
91 size_t os::Posix::_compiler_thread_min_stack_allowed = 96 * K;
92 size_t os::Posix::_java_thread_min_stack_allowed = 96 * K;
93 size_t os::Posix::_vm_internal_thread_min_stack_allowed = 96 * K;
94 #endif
95
96 int os::Solaris::max_register_window_saves_before_flushing() {
97 // We should detect this at run time. For now, filling
98 // in with a constant.
99 return 8;
100 }
101
102 static void handle_unflushed_register_windows(gwindows_t *win) {
103 int restore_count = win->wbcnt;
104 int i;
105
106 for(i=0; i<restore_count; i++) {
107 address sp = ((address)win->spbuf[i]) + STACK_BIAS;
108 address reg_win = (address)&win->wbuf[i];
109 memcpy(sp,reg_win,sizeof(struct rwindow));
110 }
111 }
112
113 char* os::non_memory_address_word() {
114 // Must never look like an address returned by reserve_memory,
115 // even in its subfields (as defined by the CPU immediate fields,
116 // if the CPU splits constants across multiple instructions).
117 // On SPARC, 0 != %hi(any real address), because there is no
118 // allocation in the first 1Kb of the virtual address space.
119 return (char*) 0;
120 }
121
122 // Validate a ucontext retrieved from walking a uc_link of a ucontext.
123 // There are issues with libthread giving out uc_links for different threads
124 // on the same uc_link chain and bad or circular links.
125 //
126 bool os::Solaris::valid_ucontext(Thread* thread, const ucontext_t* valid, const ucontext_t* suspect) {
127 if (valid >= suspect ||
128 valid->uc_stack.ss_flags != suspect->uc_stack.ss_flags ||
129 valid->uc_stack.ss_sp != suspect->uc_stack.ss_sp ||
130 valid->uc_stack.ss_size != suspect->uc_stack.ss_size) {
131 DEBUG_ONLY(tty->print_cr("valid_ucontext: failed test 1");)
132 return false;
133 }
134
135 if (thread->is_Java_thread()) {
136 if (!valid_stack_address(thread, (address)suspect)) {
137 DEBUG_ONLY(tty->print_cr("valid_ucontext: uc_link not in thread stack");)
138 return false;
139 }
140 address _sp = (address)((intptr_t)suspect->uc_mcontext.gregs[REG_SP] + STACK_BIAS);
141 if (!valid_stack_address(thread, _sp) ||
142 !frame::is_valid_stack_pointer(((JavaThread*)thread)->base_of_stack_pointer(), (intptr_t*)_sp)) {
143 DEBUG_ONLY(tty->print_cr("valid_ucontext: stackpointer not in thread stack");)
144 return false;
145 }
146 }
147 return true;
148 }
149
150 // We will only follow one level of uc_link since there are libthread
151 // issues with ucontext linking and it is better to be safe and just
152 // let caller retry later.
153 const ucontext_t* os::Solaris::get_valid_uc_in_signal_handler(Thread *thread,
154 const ucontext_t *uc) {
155
156 const ucontext_t *retuc = NULL;
157
158 // Sometimes the topmost register windows are not properly flushed.
159 // i.e., if the kernel would have needed to take a page fault
160 if (uc != NULL && uc->uc_mcontext.gwins != NULL) {
161 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
162 }
163
164 if (uc != NULL) {
165 if (uc->uc_link == NULL) {
166 // cannot validate without uc_link so accept current ucontext
167 retuc = uc;
168 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) {
169 // first ucontext is valid so try the next one
170 uc = uc->uc_link;
171 if (uc->uc_link == NULL) {
172 // cannot validate without uc_link so accept current ucontext
173 retuc = uc;
174 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) {
175 // the ucontext one level down is also valid so return it
176 retuc = uc;
177 }
178 }
179 }
180 return retuc;
181 }
182
183 // Assumes ucontext is valid
184 ExtendedPC os::Solaris::ucontext_get_ExtendedPC(const ucontext_t *uc) {
185 address pc = (address)uc->uc_mcontext.gregs[REG_PC];
186 // set npc to zero to avoid using it for safepoint, good for profiling only
187 return ExtendedPC(pc);
188 }
189
190 void os::Solaris::ucontext_set_pc(ucontext_t* uc, address pc) {
191 uc->uc_mcontext.gregs [REG_PC] = (greg_t) pc;
192 uc->uc_mcontext.gregs [REG_nPC] = (greg_t) (pc + 4);
193 }
194
195 // Assumes ucontext is valid
196 intptr_t* os::Solaris::ucontext_get_sp(const ucontext_t *uc) {
197 return (intptr_t*)((intptr_t)uc->uc_mcontext.gregs[REG_SP] + STACK_BIAS);
198 }
199
200 // Solaris X86 only
201 intptr_t* os::Solaris::ucontext_get_fp(const ucontext_t *uc) {
202 ShouldNotReachHere();
203 return NULL;
204 }
205
206 address os::Solaris::ucontext_get_pc(const ucontext_t *uc) {
207 return (address) uc->uc_mcontext.gregs[REG_PC];
208 }
209
210
211 // For Forte Analyzer AsyncGetCallTrace profiling support - thread
212 // is currently interrupted by SIGPROF.
213 //
214 // ret_fp parameter is only used by Solaris X86.
215 //
216 // The difference between this and os::fetch_frame_from_context() is that
217 // here we try to skip nested signal frames.
218 // This method is also used for stack overflow signal handling.
219 ExtendedPC os::Solaris::fetch_frame_from_ucontext(Thread* thread,
220 const ucontext_t* uc, intptr_t** ret_sp, intptr_t** ret_fp) {
221
222 assert(thread != NULL, "just checking");
223 assert(ret_sp != NULL, "just checking");
224 assert(ret_fp == NULL, "just checking");
225
226 const ucontext_t *luc = os::Solaris::get_valid_uc_in_signal_handler(thread, uc);
227
228 return os::fetch_frame_from_context(luc, ret_sp, ret_fp);
229 }
230
231
232 // ret_fp parameter is only used by Solaris X86.
233 ExtendedPC os::fetch_frame_from_context(const void* ucVoid,
234 intptr_t** ret_sp, intptr_t** ret_fp) {
235
236 ExtendedPC epc;
237 const ucontext_t *uc = (const ucontext_t*)ucVoid;
238
239 if (uc != NULL) {
240 epc = os::Solaris::ucontext_get_ExtendedPC(uc);
241 if (ret_sp) *ret_sp = os::Solaris::ucontext_get_sp(uc);
242 } else {
243 // construct empty ExtendedPC for return value checking
244 epc = ExtendedPC(NULL);
245 if (ret_sp) *ret_sp = (intptr_t *)NULL;
246 }
247
248 return epc;
249 }
250
251 frame os::fetch_frame_from_context(const void* ucVoid) {
252 intptr_t* sp;
253 intptr_t* fp;
254 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp);
255 return frame(sp, frame::unpatchable, epc.pc());
256 }
257
258 frame os::fetch_frame_from_ucontext(Thread* thread, void* ucVoid) {
259 intptr_t* sp;
260 ExtendedPC epc = os::Solaris::fetch_frame_from_ucontext(thread, (ucontext_t*)ucVoid, &sp, NULL);
261 return frame(sp, frame::unpatchable, epc.pc());
262 }
263
264 bool os::Solaris::get_frame_at_stack_banging_point(JavaThread* thread, ucontext_t* uc, frame* fr) {
265 address pc = (address) os::Solaris::ucontext_get_pc(uc);
266 if (Interpreter::contains(pc)) {
267 *fr = os::fetch_frame_from_ucontext(thread, uc);
268 if (!fr->is_first_java_frame()) {
269 assert(fr->safe_for_sender(thread), "Safety check");
270 *fr = fr->java_sender();
271 }
272 } else {
273 // more complex code with compiled code
274 assert(!Interpreter::contains(pc), "Interpreted methods should have been handled above");
275 CodeBlob* cb = CodeCache::find_blob(pc);
276 if (cb == NULL || !cb->is_nmethod() || cb->is_frame_complete_at(pc)) {
277 // Not sure where the pc points to, fallback to default
278 // stack overflow handling
279 return false;
280 } else {
281 // Returned frame will be the caller of the method that faults on the stack bang.
282 // Register window not yet rotated (happens at SAVE after stack bang), so there is no new
283 // frame to go with the faulting PC. Using caller SP that is still in SP, and caller PC
284 // that was written to O7 at call.
285 intptr_t* sp = os::Solaris::ucontext_get_sp(uc);
286 address pc = (address)uc->uc_mcontext.gregs[REG_O7];
287 *fr = frame(sp, frame::unpatchable, pc);
288
289 if (!fr->is_java_frame()) {
290 assert(fr->safe_for_sender(thread), "Safety check");
291 *fr = fr->java_sender();
292 }
293 }
294 }
295 assert(fr->is_java_frame(), "Safety check");
296 return true;
297 }
298
299 frame os::get_sender_for_C_frame(frame* fr) {
300 return frame(fr->sender_sp(), frame::unpatchable, fr->sender_pc());
301 }
302
303 // Returns an estimate of the current stack pointer. Result must be guaranteed to
304 // point into the calling threads stack, and be no lower than the current stack
305 // pointer.
306 address os::current_stack_pointer() {
307 volatile int dummy;
308 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right
309 return sp;
310 }
311
312 frame os::current_frame() {
313 intptr_t* sp = StubRoutines::Sparc::flush_callers_register_windows_func()();
314 frame myframe(sp, frame::unpatchable,
315 CAST_FROM_FN_PTR(address, os::current_frame));
316 if (os::is_first_C_frame(&myframe)) {
317 // stack is not walkable
318 return frame(NULL, NULL, false);
319 } else {
320 return os::get_sender_for_C_frame(&myframe);
321 }
322 }
323
324 bool os::is_allocatable(size_t bytes) {
325 #ifdef _LP64
326 return true;
327 #else
328 return (bytes <= (size_t)3835*M);
329 #endif
330 }
331
332 extern "C" JNIEXPORT int
333 JVM_handle_solaris_signal(int sig, siginfo_t* info, void* ucVoid,
334 int abort_if_unrecognized) {
335 ucontext_t* uc = (ucontext_t*) ucVoid;
336
337 Thread* t = Thread::current_or_null_safe();
338
339 // Must do this before SignalHandlerMark, if crash protection installed we will longjmp away
340 // (no destructors can be run)
341 os::WatcherThreadCrashProtection::check_crash_protection(sig, t);
342
343 SignalHandlerMark shm(t);
344
345 if(sig == SIGPIPE || sig == SIGXFSZ) {
346 if (os::Solaris::chained_handler(sig, info, ucVoid)) {
347 return true;
348 } else {
349 // Ignoring SIGPIPE/SIGXFSZ - see bugs 4229104 or 6499219
350 return true;
351 }
352 }
353
354 JavaThread* thread = NULL;
355 VMThread* vmthread = NULL;
356 if (os::Solaris::signal_handlers_are_installed) {
357 if (t != NULL ){
358 if(t->is_Java_thread()) {
359 thread = (JavaThread*)t;
360 }
361 else if(t->is_VM_thread()){
362 vmthread = (VMThread *)t;
363 }
364 }
365 }
366
367 if (sig == os::Solaris::SIGasync()) {
368 if (thread || vmthread) {
369 OSThread::SR_handler(t, uc);
370 return true;
371 } else if (os::Solaris::chained_handler(sig, info, ucVoid)) {
372 return true;
373 } else {
374 // If os::Solaris::SIGasync not chained, and this is a non-vm and
375 // non-java thread
376 return true;
377 }
378 }
379
380 if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) {
381 // can't decode this kind of signal
382 info = NULL;
383 } else {
384 assert(sig == info->si_signo, "bad siginfo");
385 }
386
387 // decide if this trap can be handled by a stub
388 address stub = NULL;
389
390 address pc = NULL;
391 address npc = NULL;
392
393 //%note os_trap_1
394 if (info != NULL && uc != NULL && thread != NULL) {
395 // factor me: getPCfromContext
396 pc = (address) uc->uc_mcontext.gregs[REG_PC];
397 npc = (address) uc->uc_mcontext.gregs[REG_nPC];
398
399 // SafeFetch() support
400 if (StubRoutines::is_safefetch_fault(pc)) {
401 os::Solaris::ucontext_set_pc(uc, StubRoutines::continuation_for_safefetch_fault(pc));
402 return 1;
403 }
404
405 // Handle ALL stack overflow variations here
406 if (sig == SIGSEGV && info->si_code == SEGV_ACCERR) {
407 address addr = (address) info->si_addr;
408 if (thread->in_stack_yellow_reserved_zone(addr)) {
409 // Sometimes the register windows are not properly flushed.
410 if(uc->uc_mcontext.gwins != NULL) {
411 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
412 }
413 if (thread->thread_state() == _thread_in_Java) {
414 if (thread->in_stack_reserved_zone(addr)) {
415 frame fr;
416 if (os::Solaris::get_frame_at_stack_banging_point(thread, uc, &fr)) {
417 assert(fr.is_java_frame(), "Must be a Java frame");
418 frame activation = SharedRuntime::look_for_reserved_stack_annotated_method(thread, fr);
419 if (activation.sp() != NULL) {
420 thread->disable_stack_reserved_zone();
421 RegisterMap map(thread);
422 int frame_size = activation.frame_size(&map);
423 thread->set_reserved_stack_activation((address)(((address)activation.sp()) - STACK_BIAS));
424 return true;
425 }
426 }
427 }
428 // Throw a stack overflow exception. Guard pages will be reenabled
429 // while unwinding the stack.
430 thread->disable_stack_yellow_reserved_zone();
431 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW);
432 } else {
433 // Thread was in the vm or native code. Return and try to finish.
434 thread->disable_stack_yellow_reserved_zone();
435 return true;
436 }
437 } else if (thread->in_stack_red_zone(addr)) {
438 // Fatal red zone violation. Disable the guard pages and fall through
439 // to handle_unexpected_exception way down below.
440 thread->disable_stack_red_zone();
441 tty->print_raw_cr("An irrecoverable stack overflow has occurred.");
442 // Sometimes the register windows are not properly flushed.
443 if(uc->uc_mcontext.gwins != NULL) {
444 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
445 }
446 }
447 }
448
449
450 if (thread->thread_state() == _thread_in_vm) {
451 if (sig == SIGBUS && thread->doing_unsafe_access()) {
452 stub = SharedRuntime::handle_unsafe_access(thread, npc);
453 }
454 }
455
456 else if (thread->thread_state() == _thread_in_Java) {
457 // Java thread running in Java code => find exception handler if any
458 // a fault inside compiled code, the interpreter, or a stub
459
460 // Support Safepoint Polling
461 if ( sig == SIGSEGV && (address)info->si_addr == os::get_polling_page() ) {
462 stub = SharedRuntime::get_poll_stub(pc);
463 }
464
465 // Not needed on x86 solaris because verify_oops doesn't generate
466 // SEGV/BUS like sparc does.
467 if ( (sig == SIGSEGV || sig == SIGBUS)
468 && pc >= MacroAssembler::_verify_oop_implicit_branch[0]
469 && pc < MacroAssembler::_verify_oop_implicit_branch[1] ) {
470 stub = MacroAssembler::_verify_oop_implicit_branch[2];
471 warning("fixed up memory fault in +VerifyOops at address " INTPTR_FORMAT, info->si_addr);
472 }
473
474 // This is not factored because on x86 solaris the patching for
475 // zombies does not generate a SEGV.
476 else if (sig == SIGSEGV && nativeInstruction_at(pc)->is_zombie()) {
477 // zombie method (ld [%g0],%o7 instruction)
478 stub = SharedRuntime::get_handle_wrong_method_stub();
479
480 // At the stub it needs to look like a call from the caller of this
481 // method (not a call from the segv site).
482 pc = (address)uc->uc_mcontext.gregs[REG_O7];
483 }
484 else if (sig == SIGBUS && info->si_code == BUS_OBJERR) {
485 // BugId 4454115: A read from a MappedByteBuffer can fault
486 // here if the underlying file has been truncated.
487 // Do not crash the VM in such a case.
488 CodeBlob* cb = CodeCache::find_blob_unsafe(pc);
489 CompiledMethod* nm = cb->as_compiled_method_or_null();
490 if (nm != NULL && nm->has_unsafe_access()) {
491 stub = SharedRuntime::handle_unsafe_access(thread, npc);
492 }
493 }
494
495 else if (sig == SIGFPE && info->si_code == FPE_INTDIV) {
496 // integer divide by zero
497 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO);
498 }
499 else if (sig == SIGFPE && info->si_code == FPE_FLTDIV) {
500 // floating-point divide by zero
501 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO);
502 }
503 #ifdef COMPILER2
504 else if (sig == SIGILL && nativeInstruction_at(pc)->is_ic_miss_trap()) {
505 #ifdef ASSERT
506 #ifdef TIERED
507 CodeBlob* cb = CodeCache::find_blob_unsafe(pc);
508 assert(cb->is_compiled_by_c2(), "Wrong compiler");
509 #endif // TIERED
510 #endif // ASSERT
511 // Inline cache missed and user trap "Tne G0+ST_RESERVED_FOR_USER_0+2" taken.
512 stub = SharedRuntime::get_ic_miss_stub();
513 // At the stub it needs to look like a call from the caller of this
514 // method (not a call from the segv site).
515 pc = (address)uc->uc_mcontext.gregs[REG_O7];
516 }
517 #endif // COMPILER2
518
519 else if (sig == SIGSEGV && info->si_code > 0 && !MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) {
520 // Determination of interpreter/vtable stub/compiled code null exception
521 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL);
522 }
523 }
524
525 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in
526 // and the heap gets shrunk before the field access.
527 if ((sig == SIGSEGV) || (sig == SIGBUS)) {
528 address addr = JNI_FastGetField::find_slowcase_pc(pc);
529 if (addr != (address)-1) {
530 stub = addr;
531 }
532 }
533
534 // Check to see if we caught the safepoint code in the
535 // process of write protecting the memory serialization page.
536 // It write enables the page immediately after protecting it
537 // so just return.
538 if ((sig == SIGSEGV) &&
539 os::is_memory_serialize_page(thread, (address)info->si_addr)) {
540 // Block current thread until the memory serialize page permission restored.
541 os::block_on_serialize_page_trap();
542 return true;
543 }
544 }
545
546 if (stub != NULL) {
547 // save all thread context in case we need to restore it
548
549 thread->set_saved_exception_pc(pc);
550 thread->set_saved_exception_npc(npc);
551
552 // simulate a branch to the stub (a "call" in the safepoint stub case)
553 // factor me: setPC
554 os::Solaris::ucontext_set_pc(uc, stub);
555
556 return true;
557 }
558
559 // signal-chaining
560 if (os::Solaris::chained_handler(sig, info, ucVoid)) {
561 return true;
562 }
563
564 if (!abort_if_unrecognized) {
565 // caller wants another chance, so give it to him
566 return false;
567 }
568
569 if (!os::Solaris::libjsig_is_loaded) {
570 struct sigaction oldAct;
571 sigaction(sig, (struct sigaction *)0, &oldAct);
572 if (oldAct.sa_sigaction != signalHandler) {
573 void* sighand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
574 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
575 warning("Unexpected Signal %d occurred under user-defined signal handler " INTPTR_FORMAT, sig, (intptr_t)sighand);
576 }
577 }
578
579 if (pc == NULL && uc != NULL) {
580 pc = (address) uc->uc_mcontext.gregs[REG_PC];
581 }
582
583 // Sometimes the register windows are not properly flushed.
584 if(uc->uc_mcontext.gwins != NULL) {
585 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
586 }
587
588 // unmask current signal
589 sigset_t newset;
590 sigemptyset(&newset);
591 sigaddset(&newset, sig);
592 sigprocmask(SIG_UNBLOCK, &newset, NULL);
593
594 // Determine which sort of error to throw. Out of swap may signal
595 // on the thread stack, which could get a mapping error when touched.
596 address addr = (address) info->si_addr;
597 if (sig == SIGBUS && info->si_code == BUS_OBJERR && info->si_errno == ENOMEM) {
598 vm_exit_out_of_memory(0, OOM_MMAP_ERROR, "Out of swap space to map in thread stack.");
599 }
600
601 VMError::report_and_die(t, sig, pc, info, ucVoid);
602
603 ShouldNotReachHere();
604 return false;
605 }
606
607 void os::print_context(outputStream *st, const void *context) {
608 if (context == NULL) return;
609
610 const ucontext_t *uc = (const ucontext_t*)context;
611 st->print_cr("Registers:");
612
613 st->print_cr(" G1=" INTPTR_FORMAT " G2=" INTPTR_FORMAT
614 " G3=" INTPTR_FORMAT " G4=" INTPTR_FORMAT,
615 uc->uc_mcontext.gregs[REG_G1],
616 uc->uc_mcontext.gregs[REG_G2],
617 uc->uc_mcontext.gregs[REG_G3],
618 uc->uc_mcontext.gregs[REG_G4]);
619 st->print_cr(" G5=" INTPTR_FORMAT " G6=" INTPTR_FORMAT
620 " G7=" INTPTR_FORMAT " Y=" INTPTR_FORMAT,
621 uc->uc_mcontext.gregs[REG_G5],
622 uc->uc_mcontext.gregs[REG_G6],
623 uc->uc_mcontext.gregs[REG_G7],
624 uc->uc_mcontext.gregs[REG_Y]);
625 st->print_cr(" O0=" INTPTR_FORMAT " O1=" INTPTR_FORMAT
626 " O2=" INTPTR_FORMAT " O3=" INTPTR_FORMAT,
627 uc->uc_mcontext.gregs[REG_O0],
628 uc->uc_mcontext.gregs[REG_O1],
629 uc->uc_mcontext.gregs[REG_O2],
630 uc->uc_mcontext.gregs[REG_O3]);
631 st->print_cr(" O4=" INTPTR_FORMAT " O5=" INTPTR_FORMAT
632 " O6=" INTPTR_FORMAT " O7=" INTPTR_FORMAT,
633 uc->uc_mcontext.gregs[REG_O4],
634 uc->uc_mcontext.gregs[REG_O5],
635 uc->uc_mcontext.gregs[REG_O6],
636 uc->uc_mcontext.gregs[REG_O7]);
637
638
639 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc);
640 st->print_cr(" L0=" INTPTR_FORMAT " L1=" INTPTR_FORMAT
641 " L2=" INTPTR_FORMAT " L3=" INTPTR_FORMAT,
642 sp[L0->sp_offset_in_saved_window()],
643 sp[L1->sp_offset_in_saved_window()],
644 sp[L2->sp_offset_in_saved_window()],
645 sp[L3->sp_offset_in_saved_window()]);
646 st->print_cr(" L4=" INTPTR_FORMAT " L5=" INTPTR_FORMAT
647 " L6=" INTPTR_FORMAT " L7=" INTPTR_FORMAT,
648 sp[L4->sp_offset_in_saved_window()],
649 sp[L5->sp_offset_in_saved_window()],
650 sp[L6->sp_offset_in_saved_window()],
651 sp[L7->sp_offset_in_saved_window()]);
652 st->print_cr(" I0=" INTPTR_FORMAT " I1=" INTPTR_FORMAT
653 " I2=" INTPTR_FORMAT " I3=" INTPTR_FORMAT,
654 sp[I0->sp_offset_in_saved_window()],
655 sp[I1->sp_offset_in_saved_window()],
656 sp[I2->sp_offset_in_saved_window()],
657 sp[I3->sp_offset_in_saved_window()]);
658 st->print_cr(" I4=" INTPTR_FORMAT " I5=" INTPTR_FORMAT
659 " I6=" INTPTR_FORMAT " I7=" INTPTR_FORMAT,
660 sp[I4->sp_offset_in_saved_window()],
661 sp[I5->sp_offset_in_saved_window()],
662 sp[I6->sp_offset_in_saved_window()],
663 sp[I7->sp_offset_in_saved_window()]);
664
665 st->print_cr(" PC=" INTPTR_FORMAT " nPC=" INTPTR_FORMAT,
666 uc->uc_mcontext.gregs[REG_PC],
667 uc->uc_mcontext.gregs[REG_nPC]);
668 st->cr();
669 st->cr();
670
671 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp);
672 print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t));
673 st->cr();
674
675 // Note: it may be unsafe to inspect memory near pc. For example, pc may
676 // point to garbage if entry point in an nmethod is corrupted. Leave
677 // this at the end, and hope for the best.
678 ExtendedPC epc = os::Solaris::ucontext_get_ExtendedPC(uc);
679 address pc = epc.pc();
680 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc);
681 print_hex_dump(st, pc - 32, pc + 32, sizeof(char));
682 }
683
684 void os::print_register_info(outputStream *st, const void *context) {
685 if (context == NULL) return;
686
687 const ucontext_t *uc = (const ucontext_t*)context;
688 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc);
689
690 st->print_cr("Register to memory mapping:");
691 st->cr();
692
693 // this is only for the "general purpose" registers
694 st->print("G1="); print_location(st, uc->uc_mcontext.gregs[REG_G1]);
695 st->print("G2="); print_location(st, uc->uc_mcontext.gregs[REG_G2]);
696 st->print("G3="); print_location(st, uc->uc_mcontext.gregs[REG_G3]);
697 st->print("G4="); print_location(st, uc->uc_mcontext.gregs[REG_G4]);
698 st->print("G5="); print_location(st, uc->uc_mcontext.gregs[REG_G5]);
699 st->print("G6="); print_location(st, uc->uc_mcontext.gregs[REG_G6]);
700 st->print("G7="); print_location(st, uc->uc_mcontext.gregs[REG_G7]);
701 st->cr();
702
703 st->print("O0="); print_location(st, uc->uc_mcontext.gregs[REG_O0]);
704 st->print("O1="); print_location(st, uc->uc_mcontext.gregs[REG_O1]);
705 st->print("O2="); print_location(st, uc->uc_mcontext.gregs[REG_O2]);
706 st->print("O3="); print_location(st, uc->uc_mcontext.gregs[REG_O3]);
707 st->print("O4="); print_location(st, uc->uc_mcontext.gregs[REG_O4]);
708 st->print("O5="); print_location(st, uc->uc_mcontext.gregs[REG_O5]);
709 st->print("O6="); print_location(st, uc->uc_mcontext.gregs[REG_O6]);
710 st->print("O7="); print_location(st, uc->uc_mcontext.gregs[REG_O7]);
711 st->cr();
712
713 st->print("L0="); print_location(st, sp[L0->sp_offset_in_saved_window()]);
714 st->print("L1="); print_location(st, sp[L1->sp_offset_in_saved_window()]);
715 st->print("L2="); print_location(st, sp[L2->sp_offset_in_saved_window()]);
716 st->print("L3="); print_location(st, sp[L3->sp_offset_in_saved_window()]);
717 st->print("L4="); print_location(st, sp[L4->sp_offset_in_saved_window()]);
718 st->print("L5="); print_location(st, sp[L5->sp_offset_in_saved_window()]);
719 st->print("L6="); print_location(st, sp[L6->sp_offset_in_saved_window()]);
720 st->print("L7="); print_location(st, sp[L7->sp_offset_in_saved_window()]);
721 st->cr();
722
723 st->print("I0="); print_location(st, sp[I0->sp_offset_in_saved_window()]);
724 st->print("I1="); print_location(st, sp[I1->sp_offset_in_saved_window()]);
725 st->print("I2="); print_location(st, sp[I2->sp_offset_in_saved_window()]);
726 st->print("I3="); print_location(st, sp[I3->sp_offset_in_saved_window()]);
727 st->print("I4="); print_location(st, sp[I4->sp_offset_in_saved_window()]);
728 st->print("I5="); print_location(st, sp[I5->sp_offset_in_saved_window()]);
729 st->print("I6="); print_location(st, sp[I6->sp_offset_in_saved_window()]);
730 st->print("I7="); print_location(st, sp[I7->sp_offset_in_saved_window()]);
731 st->cr();
732 }
733
734 void os::Solaris::init_thread_fpu_state(void) {
735 // Nothing needed on Sparc.
736 }
737
738 #if !defined(COMPILER2) && !defined(_LP64)
739
740 // These routines are the initial value of atomic_xchg_entry(),
741 // atomic_cmpxchg_entry(), atomic_add_entry() and fence_entry()
742 // until initialization is complete.
743 // TODO - remove when the VM drops support for V8.
744
745 typedef jint xchg_func_t (jint, volatile jint*);
746 typedef jint cmpxchg_func_t (jint, volatile jint*, jint);
747 typedef jlong cmpxchg_long_func_t(jlong, volatile jlong*, jlong);
748 typedef jint add_func_t (jint, volatile jint*);
749
750 jint os::atomic_xchg_bootstrap(jint exchange_value, volatile jint* dest) {
751 // try to use the stub:
752 xchg_func_t* func = CAST_TO_FN_PTR(xchg_func_t*, StubRoutines::atomic_xchg_entry());
753
754 if (func != NULL) {
755 os::atomic_xchg_func = func;
756 return (*func)(exchange_value, dest);
757 }
758 assert(Threads::number_of_threads() == 0, "for bootstrap only");
759
760 jint old_value = *dest;
761 *dest = exchange_value;
762 return old_value;
763 }
764
765 jint os::atomic_cmpxchg_bootstrap(jint exchange_value, volatile jint* dest, jint compare_value) {
766 // try to use the stub:
767 cmpxchg_func_t* func = CAST_TO_FN_PTR(cmpxchg_func_t*, StubRoutines::atomic_cmpxchg_entry());
768
769 if (func != NULL) {
770 os::atomic_cmpxchg_func = func;
771 return (*func)(exchange_value, dest, compare_value);
772 }
773 assert(Threads::number_of_threads() == 0, "for bootstrap only");
774
775 jint old_value = *dest;
776 if (old_value == compare_value)
777 *dest = exchange_value;
778 return old_value;
779 }
780
781 jlong os::atomic_cmpxchg_long_bootstrap(jlong exchange_value, volatile jlong* dest, jlong compare_value) {
782 // try to use the stub:
783 cmpxchg_long_func_t* func = CAST_TO_FN_PTR(cmpxchg_long_func_t*, StubRoutines::atomic_cmpxchg_long_entry());
784
785 if (func != NULL) {
786 os::atomic_cmpxchg_long_func = func;
787 return (*func)(exchange_value, dest, compare_value);
788 }
789 assert(Threads::number_of_threads() == 0, "for bootstrap only");
790
791 jlong old_value = *dest;
792 if (old_value == compare_value)
793 *dest = exchange_value;
794 return old_value;
795 }
796
797 jint os::atomic_add_bootstrap(jint add_value, volatile jint* dest) {
798 // try to use the stub:
799 add_func_t* func = CAST_TO_FN_PTR(add_func_t*, StubRoutines::atomic_add_entry());
800
801 if (func != NULL) {
802 os::atomic_add_func = func;
803 return (*func)(add_value, dest);
804 }
805 assert(Threads::number_of_threads() == 0, "for bootstrap only");
806
807 return (*dest) += add_value;
808 }
809
810 xchg_func_t* os::atomic_xchg_func = os::atomic_xchg_bootstrap;
811 cmpxchg_func_t* os::atomic_cmpxchg_func = os::atomic_cmpxchg_bootstrap;
812 cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap;
813 add_func_t* os::atomic_add_func = os::atomic_add_bootstrap;
814
815 #endif // !_LP64 && !COMPILER2
816
817 #if defined(__sparc) && defined(COMPILER2) && defined(_GNU_SOURCE)
818 // See file build/solaris/makefiles/$compiler.make
819 // For compiler1 the architecture is v8 and frps isn't present in v8
820 extern "C" void _mark_fpu_nosave() {
821 __asm__ __volatile__ ("wr %%g0, 0, %%fprs \n\t" : : :);
822 }
823 #endif //defined(__sparc) && defined(COMPILER2)
824
825 #ifndef PRODUCT
826 void os::verify_stack_alignment() {
827 }
828 #endif
829
830 int os::extra_bang_size_in_bytes() {
831 // SPARC does not require an additional stack bang.
832 return 0;
833 }