1 /*
2 * Copyright (c) 1999, 2014, 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::get_sender_for_C_frame(frame* fr) {
256 return frame(fr->sender_sp(), frame::unpatchable, fr->sender_pc());
257 }
258
259 // Returns an estimate of the current stack pointer. Result must be guaranteed to
260 // point into the calling threads stack, and be no lower than the current stack
261 // pointer.
262 address os::current_stack_pointer() {
263 volatile int dummy;
264 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right
265 return sp;
266 }
267
268 frame os::current_frame() {
269 intptr_t* sp = StubRoutines::Sparc::flush_callers_register_windows_func()();
270 frame myframe(sp, frame::unpatchable,
271 CAST_FROM_FN_PTR(address, os::current_frame));
272 if (os::is_first_C_frame(&myframe)) {
273 // stack is not walkable
274 return frame(NULL, NULL, false);
275 } else {
276 return os::get_sender_for_C_frame(&myframe);
277 }
278 }
279
280 bool os::is_allocatable(size_t bytes) {
281 #ifdef _LP64
282 return true;
283 #else
284 return (bytes <= (size_t)3835*M);
285 #endif
286 }
287
288 extern "C" JNIEXPORT int
289 JVM_handle_solaris_signal(int sig, siginfo_t* info, void* ucVoid,
290 int abort_if_unrecognized) {
291 ucontext_t* uc = (ucontext_t*) ucVoid;
292
293 Thread* t = ThreadLocalStorage::get_thread_slow();
294
295 // Must do this before SignalHandlerMark, if crash protection installed we will longjmp away
296 // (no destructors can be run)
297 os::WatcherThreadCrashProtection::check_crash_protection(sig, t);
298
299 SignalHandlerMark shm(t);
300
301 if(sig == SIGPIPE || sig == SIGXFSZ) {
302 if (os::Solaris::chained_handler(sig, info, ucVoid)) {
303 return true;
304 } else {
305 if (PrintMiscellaneous && (WizardMode || Verbose)) {
306 char buf[64];
307 warning("Ignoring %s - see 4229104 or 6499219",
308 os::exception_name(sig, buf, sizeof(buf)));
309
310 }
311 return true;
312 }
313 }
314
315 JavaThread* thread = NULL;
316 VMThread* vmthread = NULL;
317 if (os::Solaris::signal_handlers_are_installed) {
318 if (t != NULL ){
319 if(t->is_Java_thread()) {
320 thread = (JavaThread*)t;
321 }
322 else if(t->is_VM_thread()){
323 vmthread = (VMThread *)t;
324 }
325 }
326 }
327
328 guarantee(sig != os::Solaris::SIGinterrupt(), "Can not chain VM interrupt signal, try -XX:+UseAltSigs");
329
330 if (sig == os::Solaris::SIGasync()) {
331 if (thread || vmthread) {
332 OSThread::SR_handler(t, uc);
333 return true;
334 } else if (os::Solaris::chained_handler(sig, info, ucVoid)) {
335 return true;
336 } else {
337 // If os::Solaris::SIGasync not chained, and this is a non-vm and
338 // non-java thread
339 return true;
340 }
341 }
342
343 if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) {
344 // can't decode this kind of signal
345 info = NULL;
346 } else {
347 assert(sig == info->si_signo, "bad siginfo");
348 }
349
350 // decide if this trap can be handled by a stub
351 address stub = NULL;
352
353 address pc = NULL;
354 address npc = NULL;
355
356 //%note os_trap_1
357 if (info != NULL && uc != NULL && thread != NULL) {
358 // factor me: getPCfromContext
359 pc = (address) uc->uc_mcontext.gregs[REG_PC];
360 npc = (address) uc->uc_mcontext.gregs[REG_nPC];
361
362 // SafeFetch() support
363 if (StubRoutines::is_safefetch_fault(pc)) {
364 os::Solaris::ucontext_set_pc(uc, StubRoutines::continuation_for_safefetch_fault(pc));
365 return 1;
366 }
367
368 // Handle ALL stack overflow variations here
369 if (sig == SIGSEGV && info->si_code == SEGV_ACCERR) {
370 address addr = (address) info->si_addr;
371 if (thread->in_stack_yellow_zone(addr)) {
372 thread->disable_stack_yellow_zone();
373 // Sometimes the register windows are not properly flushed.
374 if(uc->uc_mcontext.gwins != NULL) {
375 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
376 }
377 if (thread->thread_state() == _thread_in_Java) {
378 // Throw a stack overflow exception. Guard pages will be reenabled
379 // while unwinding the stack.
380 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW);
381 } else {
382 // Thread was in the vm or native code. Return and try to finish.
383 return true;
384 }
385 } else if (thread->in_stack_red_zone(addr)) {
386 // Fatal red zone violation. Disable the guard pages and fall through
387 // to handle_unexpected_exception way down below.
388 thread->disable_stack_red_zone();
389 tty->print_raw_cr("An irrecoverable stack overflow has occurred.");
390 // Sometimes the register windows are not properly flushed.
391 if(uc->uc_mcontext.gwins != NULL) {
392 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
393 }
394 }
395 }
396
397
398 if (thread->thread_state() == _thread_in_vm) {
399 if (sig == SIGBUS && info->si_code == BUS_OBJERR && thread->doing_unsafe_access()) {
400 stub = StubRoutines::handler_for_unsafe_access();
401 }
402 }
403
404 else if (thread->thread_state() == _thread_in_Java) {
405 // Java thread running in Java code => find exception handler if any
406 // a fault inside compiled code, the interpreter, or a stub
407
408 // Support Safepoint Polling
409 if ( sig == SIGSEGV && (address)info->si_addr == os::get_polling_page() ) {
410 stub = SharedRuntime::get_poll_stub(pc);
411 }
412
413 // Not needed on x86 solaris because verify_oops doesn't generate
414 // SEGV/BUS like sparc does.
415 if ( (sig == SIGSEGV || sig == SIGBUS)
416 && pc >= MacroAssembler::_verify_oop_implicit_branch[0]
417 && pc < MacroAssembler::_verify_oop_implicit_branch[1] ) {
418 stub = MacroAssembler::_verify_oop_implicit_branch[2];
419 warning("fixed up memory fault in +VerifyOops at address " INTPTR_FORMAT, info->si_addr);
420 }
421
422 // This is not factored because on x86 solaris the patching for
423 // zombies does not generate a SEGV.
424 else if (sig == SIGSEGV && nativeInstruction_at(pc)->is_zombie()) {
425 // zombie method (ld [%g0],%o7 instruction)
426 stub = SharedRuntime::get_handle_wrong_method_stub();
427
428 // At the stub it needs to look like a call from the caller of this
429 // method (not a call from the segv site).
430 pc = (address)uc->uc_mcontext.gregs[REG_O7];
431 }
432 else if (sig == SIGBUS && info->si_code == BUS_OBJERR) {
433 // BugId 4454115: A read from a MappedByteBuffer can fault
434 // here if the underlying file has been truncated.
435 // Do not crash the VM in such a case.
436 CodeBlob* cb = CodeCache::find_blob_unsafe(pc);
437 nmethod* nm = cb->is_nmethod() ? (nmethod*)cb : NULL;
438 if (nm != NULL && nm->has_unsafe_access()) {
439 stub = StubRoutines::handler_for_unsafe_access();
440 }
441 }
442
443 else if (sig == SIGFPE && info->si_code == FPE_INTDIV) {
444 // integer divide by zero
445 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO);
446 }
447 else if (sig == SIGFPE && info->si_code == FPE_FLTDIV) {
448 // floating-point divide by zero
449 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO);
450 }
451 #ifdef COMPILER2
452 else if (sig == SIGILL && nativeInstruction_at(pc)->is_ic_miss_trap()) {
453 #ifdef ASSERT
454 #ifdef TIERED
455 CodeBlob* cb = CodeCache::find_blob_unsafe(pc);
456 assert(cb->is_compiled_by_c2(), "Wrong compiler");
457 #endif // TIERED
458 #endif // ASSERT
459 // Inline cache missed and user trap "Tne G0+ST_RESERVED_FOR_USER_0+2" taken.
460 stub = SharedRuntime::get_ic_miss_stub();
461 // At the stub it needs to look like a call from the caller of this
462 // method (not a call from the segv site).
463 pc = (address)uc->uc_mcontext.gregs[REG_O7];
464 }
465 #endif // COMPILER2
466
467 else if (sig == SIGSEGV && info->si_code > 0 && !MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) {
468 // Determination of interpreter/vtable stub/compiled code null exception
469 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL);
470 }
471 }
472
473 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in
474 // and the heap gets shrunk before the field access.
475 if ((sig == SIGSEGV) || (sig == SIGBUS)) {
476 address addr = JNI_FastGetField::find_slowcase_pc(pc);
477 if (addr != (address)-1) {
478 stub = addr;
479 }
480 }
481
482 // Check to see if we caught the safepoint code in the
483 // process of write protecting the memory serialization page.
484 // It write enables the page immediately after protecting it
485 // so just return.
486 if ((sig == SIGSEGV) &&
487 os::is_memory_serialize_page(thread, (address)info->si_addr)) {
488 // Block current thread until the memory serialize page permission restored.
489 os::block_on_serialize_page_trap();
490 return true;
491 }
492 }
493
494 if (stub != NULL) {
495 // save all thread context in case we need to restore it
496
497 thread->set_saved_exception_pc(pc);
498 thread->set_saved_exception_npc(npc);
499
500 // simulate a branch to the stub (a "call" in the safepoint stub case)
501 // factor me: setPC
502 os::Solaris::ucontext_set_pc(uc, stub);
503
504 #ifndef PRODUCT
505 if (TraceJumps) thread->record_jump(stub, NULL, __FILE__, __LINE__);
506 #endif /* PRODUCT */
507
508 return true;
509 }
510
511 // signal-chaining
512 if (os::Solaris::chained_handler(sig, info, ucVoid)) {
513 return true;
514 }
515
516 if (!abort_if_unrecognized) {
517 // caller wants another chance, so give it to him
518 return false;
519 }
520
521 if (!os::Solaris::libjsig_is_loaded) {
522 struct sigaction oldAct;
523 sigaction(sig, (struct sigaction *)0, &oldAct);
524 if (oldAct.sa_sigaction != signalHandler) {
525 void* sighand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
526 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
527 warning("Unexpected Signal %d occurred under user-defined signal handler " INTPTR_FORMAT, sig, (intptr_t)sighand);
528 }
529 }
530
531 if (pc == NULL && uc != NULL) {
532 pc = (address) uc->uc_mcontext.gregs[REG_PC];
533 }
534
535 // Sometimes the register windows are not properly flushed.
536 if(uc->uc_mcontext.gwins != NULL) {
537 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
538 }
539
540 // unmask current signal
541 sigset_t newset;
542 sigemptyset(&newset);
543 sigaddset(&newset, sig);
544 sigprocmask(SIG_UNBLOCK, &newset, NULL);
545
546 // Determine which sort of error to throw. Out of swap may signal
547 // on the thread stack, which could get a mapping error when touched.
548 address addr = (address) info->si_addr;
549 if (sig == SIGBUS && info->si_code == BUS_OBJERR && info->si_errno == ENOMEM) {
550 vm_exit_out_of_memory(0, OOM_MMAP_ERROR, "Out of swap space to map in thread stack.");
551 }
552
553 VMError::report_and_die(t, sig, pc, info, ucVoid);
554
555 ShouldNotReachHere();
556 }
557
558 void os::print_context(outputStream *st, void *context) {
559 if (context == NULL) return;
560
561 ucontext_t *uc = (ucontext_t*)context;
562 st->print_cr("Registers:");
563
564 st->print_cr(" G1=" INTPTR_FORMAT " G2=" INTPTR_FORMAT
565 " G3=" INTPTR_FORMAT " G4=" INTPTR_FORMAT,
566 uc->uc_mcontext.gregs[REG_G1],
567 uc->uc_mcontext.gregs[REG_G2],
568 uc->uc_mcontext.gregs[REG_G3],
569 uc->uc_mcontext.gregs[REG_G4]);
570 st->print_cr(" G5=" INTPTR_FORMAT " G6=" INTPTR_FORMAT
571 " G7=" INTPTR_FORMAT " Y=" INTPTR_FORMAT,
572 uc->uc_mcontext.gregs[REG_G5],
573 uc->uc_mcontext.gregs[REG_G6],
574 uc->uc_mcontext.gregs[REG_G7],
575 uc->uc_mcontext.gregs[REG_Y]);
576 st->print_cr(" O0=" INTPTR_FORMAT " O1=" INTPTR_FORMAT
577 " O2=" INTPTR_FORMAT " O3=" INTPTR_FORMAT,
578 uc->uc_mcontext.gregs[REG_O0],
579 uc->uc_mcontext.gregs[REG_O1],
580 uc->uc_mcontext.gregs[REG_O2],
581 uc->uc_mcontext.gregs[REG_O3]);
582 st->print_cr(" O4=" INTPTR_FORMAT " O5=" INTPTR_FORMAT
583 " O6=" INTPTR_FORMAT " O7=" INTPTR_FORMAT,
584 uc->uc_mcontext.gregs[REG_O4],
585 uc->uc_mcontext.gregs[REG_O5],
586 uc->uc_mcontext.gregs[REG_O6],
587 uc->uc_mcontext.gregs[REG_O7]);
588
589
590 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc);
591 st->print_cr(" L0=" INTPTR_FORMAT " L1=" INTPTR_FORMAT
592 " L2=" INTPTR_FORMAT " L3=" INTPTR_FORMAT,
593 sp[L0->sp_offset_in_saved_window()],
594 sp[L1->sp_offset_in_saved_window()],
595 sp[L2->sp_offset_in_saved_window()],
596 sp[L3->sp_offset_in_saved_window()]);
597 st->print_cr(" L4=" INTPTR_FORMAT " L5=" INTPTR_FORMAT
598 " L6=" INTPTR_FORMAT " L7=" INTPTR_FORMAT,
599 sp[L4->sp_offset_in_saved_window()],
600 sp[L5->sp_offset_in_saved_window()],
601 sp[L6->sp_offset_in_saved_window()],
602 sp[L7->sp_offset_in_saved_window()]);
603 st->print_cr(" I0=" INTPTR_FORMAT " I1=" INTPTR_FORMAT
604 " I2=" INTPTR_FORMAT " I3=" INTPTR_FORMAT,
605 sp[I0->sp_offset_in_saved_window()],
606 sp[I1->sp_offset_in_saved_window()],
607 sp[I2->sp_offset_in_saved_window()],
608 sp[I3->sp_offset_in_saved_window()]);
609 st->print_cr(" I4=" INTPTR_FORMAT " I5=" INTPTR_FORMAT
610 " I6=" INTPTR_FORMAT " I7=" INTPTR_FORMAT,
611 sp[I4->sp_offset_in_saved_window()],
612 sp[I5->sp_offset_in_saved_window()],
613 sp[I6->sp_offset_in_saved_window()],
614 sp[I7->sp_offset_in_saved_window()]);
615
616 st->print_cr(" PC=" INTPTR_FORMAT " nPC=" INTPTR_FORMAT,
617 uc->uc_mcontext.gregs[REG_PC],
618 uc->uc_mcontext.gregs[REG_nPC]);
619 st->cr();
620 st->cr();
621
622 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp);
623 print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t));
624 st->cr();
625
626 // Note: it may be unsafe to inspect memory near pc. For example, pc may
627 // point to garbage if entry point in an nmethod is corrupted. Leave
628 // this at the end, and hope for the best.
629 ExtendedPC epc = os::Solaris::ucontext_get_ExtendedPC(uc);
630 address pc = epc.pc();
631 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc);
632 print_hex_dump(st, pc - 32, pc + 32, sizeof(char));
633 }
634
635 void os::print_register_info(outputStream *st, void *context) {
636 if (context == NULL) return;
637
638 ucontext_t *uc = (ucontext_t*)context;
639 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc);
640
641 st->print_cr("Register to memory mapping:");
642 st->cr();
643
644 // this is only for the "general purpose" registers
645 st->print("G1="); print_location(st, uc->uc_mcontext.gregs[REG_G1]);
646 st->print("G2="); print_location(st, uc->uc_mcontext.gregs[REG_G2]);
647 st->print("G3="); print_location(st, uc->uc_mcontext.gregs[REG_G3]);
648 st->print("G4="); print_location(st, uc->uc_mcontext.gregs[REG_G4]);
649 st->print("G5="); print_location(st, uc->uc_mcontext.gregs[REG_G5]);
650 st->print("G6="); print_location(st, uc->uc_mcontext.gregs[REG_G6]);
651 st->print("G7="); print_location(st, uc->uc_mcontext.gregs[REG_G7]);
652 st->cr();
653
654 st->print("O0="); print_location(st, uc->uc_mcontext.gregs[REG_O0]);
655 st->print("O1="); print_location(st, uc->uc_mcontext.gregs[REG_O1]);
656 st->print("O2="); print_location(st, uc->uc_mcontext.gregs[REG_O2]);
657 st->print("O3="); print_location(st, uc->uc_mcontext.gregs[REG_O3]);
658 st->print("O4="); print_location(st, uc->uc_mcontext.gregs[REG_O4]);
659 st->print("O5="); print_location(st, uc->uc_mcontext.gregs[REG_O5]);
660 st->print("O6="); print_location(st, uc->uc_mcontext.gregs[REG_O6]);
661 st->print("O7="); print_location(st, uc->uc_mcontext.gregs[REG_O7]);
662 st->cr();
663
664 st->print("L0="); print_location(st, sp[L0->sp_offset_in_saved_window()]);
665 st->print("L1="); print_location(st, sp[L1->sp_offset_in_saved_window()]);
666 st->print("L2="); print_location(st, sp[L2->sp_offset_in_saved_window()]);
667 st->print("L3="); print_location(st, sp[L3->sp_offset_in_saved_window()]);
668 st->print("L4="); print_location(st, sp[L4->sp_offset_in_saved_window()]);
669 st->print("L5="); print_location(st, sp[L5->sp_offset_in_saved_window()]);
670 st->print("L6="); print_location(st, sp[L6->sp_offset_in_saved_window()]);
671 st->print("L7="); print_location(st, sp[L7->sp_offset_in_saved_window()]);
672 st->cr();
673
674 st->print("I0="); print_location(st, sp[I0->sp_offset_in_saved_window()]);
675 st->print("I1="); print_location(st, sp[I1->sp_offset_in_saved_window()]);
676 st->print("I2="); print_location(st, sp[I2->sp_offset_in_saved_window()]);
677 st->print("I3="); print_location(st, sp[I3->sp_offset_in_saved_window()]);
678 st->print("I4="); print_location(st, sp[I4->sp_offset_in_saved_window()]);
679 st->print("I5="); print_location(st, sp[I5->sp_offset_in_saved_window()]);
680 st->print("I6="); print_location(st, sp[I6->sp_offset_in_saved_window()]);
681 st->print("I7="); print_location(st, sp[I7->sp_offset_in_saved_window()]);
682 st->cr();
683 }
684
685 void os::Solaris::init_thread_fpu_state(void) {
686 // Nothing needed on Sparc.
687 }
688
689 #if !defined(COMPILER2) && !defined(_LP64)
690
691 // These routines are the initial value of atomic_xchg_entry(),
692 // atomic_cmpxchg_entry(), atomic_add_entry() and fence_entry()
693 // until initialization is complete.
694 // TODO - remove when the VM drops support for V8.
695
696 typedef jint xchg_func_t (jint, volatile jint*);
697 typedef jint cmpxchg_func_t (jint, volatile jint*, jint);
698 typedef jlong cmpxchg_long_func_t(jlong, volatile jlong*, jlong);
699 typedef jint add_func_t (jint, volatile jint*);
700
701 jint os::atomic_xchg_bootstrap(jint exchange_value, volatile jint* dest) {
702 // try to use the stub:
703 xchg_func_t* func = CAST_TO_FN_PTR(xchg_func_t*, StubRoutines::atomic_xchg_entry());
704
705 if (func != NULL) {
706 os::atomic_xchg_func = func;
707 return (*func)(exchange_value, dest);
708 }
709 assert(Threads::number_of_threads() == 0, "for bootstrap only");
710
711 jint old_value = *dest;
712 *dest = exchange_value;
713 return old_value;
714 }
715
716 jint os::atomic_cmpxchg_bootstrap(jint exchange_value, volatile jint* dest, jint compare_value) {
717 // try to use the stub:
718 cmpxchg_func_t* func = CAST_TO_FN_PTR(cmpxchg_func_t*, StubRoutines::atomic_cmpxchg_entry());
719
720 if (func != NULL) {
721 os::atomic_cmpxchg_func = func;
722 return (*func)(exchange_value, dest, compare_value);
723 }
724 assert(Threads::number_of_threads() == 0, "for bootstrap only");
725
726 jint old_value = *dest;
727 if (old_value == compare_value)
728 *dest = exchange_value;
729 return old_value;
730 }
731
732 jlong os::atomic_cmpxchg_long_bootstrap(jlong exchange_value, volatile jlong* dest, jlong compare_value) {
733 // try to use the stub:
734 cmpxchg_long_func_t* func = CAST_TO_FN_PTR(cmpxchg_long_func_t*, StubRoutines::atomic_cmpxchg_long_entry());
735
736 if (func != NULL) {
737 os::atomic_cmpxchg_long_func = func;
738 return (*func)(exchange_value, dest, compare_value);
739 }
740 assert(Threads::number_of_threads() == 0, "for bootstrap only");
741
742 jlong old_value = *dest;
743 if (old_value == compare_value)
744 *dest = exchange_value;
745 return old_value;
746 }
747
748 jint os::atomic_add_bootstrap(jint add_value, volatile jint* dest) {
749 // try to use the stub:
750 add_func_t* func = CAST_TO_FN_PTR(add_func_t*, StubRoutines::atomic_add_entry());
751
752 if (func != NULL) {
753 os::atomic_add_func = func;
754 return (*func)(add_value, dest);
755 }
756 assert(Threads::number_of_threads() == 0, "for bootstrap only");
757
758 return (*dest) += add_value;
759 }
760
761 xchg_func_t* os::atomic_xchg_func = os::atomic_xchg_bootstrap;
762 cmpxchg_func_t* os::atomic_cmpxchg_func = os::atomic_cmpxchg_bootstrap;
763 cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap;
764 add_func_t* os::atomic_add_func = os::atomic_add_bootstrap;
765
766 #endif // !_LP64 && !COMPILER2
767
768 #if defined(__sparc) && defined(COMPILER2) && defined(_GNU_SOURCE)
769 // See file build/solaris/makefiles/$compiler.make
770 // For compiler1 the architecture is v8 and frps isn't present in v8
771 extern "C" void _mark_fpu_nosave() {
772 __asm__ __volatile__ ("wr %%g0, 0, %%fprs \n\t" : : :);
773 }
774 #endif //defined(__sparc) && defined(COMPILER2)
775
776 #ifndef PRODUCT
777 void os::verify_stack_alignment() {
778 }
779 #endif
780
781 int os::extra_bang_size_in_bytes() {
782 // SPARC does not require an additional stack bang.
783 return 0;
784 }