1 /*
2 * Copyright (c) 1999, 2013, 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 "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/thread.inline.hpp"
52 #include "runtime/timer.hpp"
53 #include "utilities/events.hpp"
54 #include "utilities/vmError.hpp"
55
56 # include <signal.h> // needed first to avoid name collision for "std" with SC 5.0
57
58 // put OS-includes here
59 # include <sys/types.h>
60 # include <sys/mman.h>
61 # include <pthread.h>
62 # include <errno.h>
63 # include <dlfcn.h>
64 # include <stdio.h>
65 # include <unistd.h>
66 # include <sys/resource.h>
67 # include <thread.h>
68 # include <sys/stat.h>
69 # include <sys/time.h>
70 # include <sys/filio.h>
71 # include <sys/utsname.h>
72 # include <sys/systeminfo.h>
73 # include <sys/socket.h>
74 # include <sys/lwp.h>
75 # include <pwd.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::Solaris::min_stack_allowed = 128*K;
88 #else
89 size_t os::Solaris::min_stack_allowed = 96*K;
90 #endif
91
92 int os::Solaris::max_register_window_saves_before_flushing() {
93 // We should detect this at run time. For now, filling
94 // in with a constant.
95 return 8;
96 }
97
98 static void handle_unflushed_register_windows(gwindows_t *win) {
99 int restore_count = win->wbcnt;
100 int i;
101
102 for(i=0; i<restore_count; i++) {
103 address sp = ((address)win->spbuf[i]) + STACK_BIAS;
104 address reg_win = (address)&win->wbuf[i];
105 memcpy(sp,reg_win,sizeof(struct rwindow));
106 }
107 }
108
109 char* os::non_memory_address_word() {
110 // Must never look like an address returned by reserve_memory,
111 // even in its subfields (as defined by the CPU immediate fields,
112 // if the CPU splits constants across multiple instructions).
113 // On SPARC, 0 != %hi(any real address), because there is no
114 // allocation in the first 1Kb of the virtual address space.
115 return (char*) 0;
116 }
117
118 // Validate a ucontext retrieved from walking a uc_link of a ucontext.
119 // There are issues with libthread giving out uc_links for different threads
120 // on the same uc_link chain and bad or circular links.
121 //
122 bool os::Solaris::valid_ucontext(Thread* thread, ucontext_t* valid, ucontext_t* suspect) {
123 if (valid >= suspect ||
124 valid->uc_stack.ss_flags != suspect->uc_stack.ss_flags ||
125 valid->uc_stack.ss_sp != suspect->uc_stack.ss_sp ||
126 valid->uc_stack.ss_size != suspect->uc_stack.ss_size) {
127 DEBUG_ONLY(tty->print_cr("valid_ucontext: failed test 1");)
128 return false;
129 }
130
131 if (thread->is_Java_thread()) {
132 if (!valid_stack_address(thread, (address)suspect)) {
133 DEBUG_ONLY(tty->print_cr("valid_ucontext: uc_link not in thread stack");)
134 return false;
135 }
136 address _sp = (address)((intptr_t)suspect->uc_mcontext.gregs[REG_SP] + STACK_BIAS);
137 if (!valid_stack_address(thread, _sp) ||
138 !frame::is_valid_stack_pointer(((JavaThread*)thread)->base_of_stack_pointer(), (intptr_t*)_sp)) {
139 DEBUG_ONLY(tty->print_cr("valid_ucontext: stackpointer not in thread stack");)
140 return false;
141 }
142 }
143 return true;
144 }
145
146 // We will only follow one level of uc_link since there are libthread
147 // issues with ucontext linking and it is better to be safe and just
148 // let caller retry later.
149 ucontext_t* os::Solaris::get_valid_uc_in_signal_handler(Thread *thread,
150 ucontext_t *uc) {
151
152 ucontext_t *retuc = NULL;
153
154 // Sometimes the topmost register windows are not properly flushed.
155 // i.e., if the kernel would have needed to take a page fault
156 if (uc != NULL && uc->uc_mcontext.gwins != NULL) {
157 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
158 }
159
160 if (uc != NULL) {
161 if (uc->uc_link == NULL) {
162 // cannot validate without uc_link so accept current ucontext
163 retuc = uc;
164 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) {
165 // first ucontext is valid so try the next one
166 uc = uc->uc_link;
167 if (uc->uc_link == NULL) {
168 // cannot validate without uc_link so accept current ucontext
169 retuc = uc;
170 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) {
171 // the ucontext one level down is also valid so return it
172 retuc = uc;
173 }
174 }
175 }
176 return retuc;
177 }
178
179 // Assumes ucontext is valid
180 ExtendedPC os::Solaris::ucontext_get_ExtendedPC(ucontext_t *uc) {
181 address pc = (address)uc->uc_mcontext.gregs[REG_PC];
182 // set npc to zero to avoid using it for safepoint, good for profiling only
183 return ExtendedPC(pc);
184 }
185
186 // Assumes ucontext is valid
187 intptr_t* os::Solaris::ucontext_get_sp(ucontext_t *uc) {
188 return (intptr_t*)((intptr_t)uc->uc_mcontext.gregs[REG_SP] + STACK_BIAS);
189 }
190
191 // Solaris X86 only
192 intptr_t* os::Solaris::ucontext_get_fp(ucontext_t *uc) {
193 ShouldNotReachHere();
194 return NULL;
195 }
196
197 address os::Solaris::ucontext_get_pc(ucontext_t *uc) {
198 return (address) uc->uc_mcontext.gregs[REG_PC];
199 }
200
201
202 // For Forte Analyzer AsyncGetCallTrace profiling support - thread
203 // is currently interrupted by SIGPROF.
204 //
205 // ret_fp parameter is only used by Solaris X86.
206 //
207 // The difference between this and os::fetch_frame_from_context() is that
208 // here we try to skip nested signal frames.
209 ExtendedPC os::Solaris::fetch_frame_from_ucontext(Thread* thread,
210 ucontext_t* uc, intptr_t** ret_sp, intptr_t** ret_fp) {
211
212 assert(thread != NULL, "just checking");
213 assert(ret_sp != NULL, "just checking");
214 assert(ret_fp == NULL, "just checking");
215
216 ucontext_t *luc = os::Solaris::get_valid_uc_in_signal_handler(thread, uc);
217
218 return os::fetch_frame_from_context(luc, ret_sp, ret_fp);
219 }
220
221
222 // ret_fp parameter is only used by Solaris X86.
223 ExtendedPC os::fetch_frame_from_context(void* ucVoid,
224 intptr_t** ret_sp, intptr_t** ret_fp) {
225
226 ExtendedPC epc;
227 ucontext_t *uc = (ucontext_t*)ucVoid;
228
229 if (uc != NULL) {
230 epc = os::Solaris::ucontext_get_ExtendedPC(uc);
231 if (ret_sp) *ret_sp = os::Solaris::ucontext_get_sp(uc);
232 } else {
233 // construct empty ExtendedPC for return value checking
234 epc = ExtendedPC(NULL);
235 if (ret_sp) *ret_sp = (intptr_t *)NULL;
236 }
237
238 return epc;
239 }
240
241 frame os::fetch_frame_from_context(void* ucVoid) {
242 intptr_t* sp;
243 intptr_t* fp;
244 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp);
245 return frame(sp, frame::unpatchable, epc.pc());
246 }
247
248 frame os::get_sender_for_C_frame(frame* fr) {
249 return frame(fr->sender_sp(), frame::unpatchable, fr->sender_pc());
250 }
251
252 // Returns an estimate of the current stack pointer. Result must be guaranteed to
253 // point into the calling threads stack, and be no lower than the current stack
254 // pointer.
255 address os::current_stack_pointer() {
256 volatile int dummy;
257 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right
258 return sp;
259 }
260
261 frame os::current_frame() {
262 intptr_t* sp = StubRoutines::Sparc::flush_callers_register_windows_func()();
263 frame myframe(sp, frame::unpatchable,
264 CAST_FROM_FN_PTR(address, os::current_frame));
265 if (os::is_first_C_frame(&myframe)) {
266 // stack is not walkable
267 return frame(NULL, NULL, NULL);
268 } else {
269 return os::get_sender_for_C_frame(&myframe);
270 }
271 }
272
273 static int threadgetstate(thread_t tid, int *flags, lwpid_t *lwp, stack_t *ss, gregset_t rs, lwpstatus_t *lwpstatus) {
274 char lwpstatusfile[PROCFILE_LENGTH];
275 int lwpfd, err;
276
277 if (err = os::Solaris::thr_getstate(tid, flags, lwp, ss, rs))
278 return (err);
279 if (*flags == TRS_LWPID) {
280 sprintf(lwpstatusfile, "/proc/%d/lwp/%d/lwpstatus", getpid(),
281 *lwp);
282 if ((lwpfd = ::open(lwpstatusfile, O_RDONLY)) < 0) {
283 perror("thr_mutator_status: open lwpstatus");
284 return (EINVAL);
285 }
286 if (pread(lwpfd, lwpstatus, sizeof (lwpstatus_t), (off_t)0) !=
287 sizeof (lwpstatus_t)) {
288 perror("thr_mutator_status: read lwpstatus");
289 (void) ::close(lwpfd);
290 return (EINVAL);
291 }
292 (void) ::close(lwpfd);
293 }
294 return (0);
295 }
296
297
298 bool os::is_allocatable(size_t bytes) {
299 #ifdef _LP64
300 return true;
301 #else
302 return (bytes <= (size_t)3835*M);
303 #endif
304 }
305
306 extern "C" JNIEXPORT int
307 JVM_handle_solaris_signal(int sig, siginfo_t* info, void* ucVoid,
308 int abort_if_unrecognized) {
309 ucontext_t* uc = (ucontext_t*) ucVoid;
310
311 Thread* t = ThreadLocalStorage::get_thread_slow();
312
313 // Must do this before SignalHandlerMark, if crash protection installed we will longjmp away
314 // (no destructors can be run)
315 os::WatcherThreadCrashProtection::check_crash_protection(sig, t);
316
317 SignalHandlerMark shm(t);
318
319 if(sig == SIGPIPE || sig == SIGXFSZ) {
320 if (os::Solaris::chained_handler(sig, info, ucVoid)) {
321 return true;
322 } else {
323 if (PrintMiscellaneous && (WizardMode || Verbose)) {
324 char buf[64];
325 warning("Ignoring %s - see 4229104 or 6499219",
326 os::exception_name(sig, buf, sizeof(buf)));
327
328 }
329 return true;
330 }
331 }
332
333 JavaThread* thread = NULL;
334 VMThread* vmthread = NULL;
335 if (os::Solaris::signal_handlers_are_installed) {
336 if (t != NULL ){
337 if(t->is_Java_thread()) {
338 thread = (JavaThread*)t;
339 }
340 else if(t->is_VM_thread()){
341 vmthread = (VMThread *)t;
342 }
343 }
344 }
345
346 guarantee(sig != os::Solaris::SIGinterrupt(), "Can not chain VM interrupt signal, try -XX:+UseAltSigs");
347
348 if (sig == os::Solaris::SIGasync()) {
349 if (thread || vmthread) {
350 OSThread::SR_handler(t, uc);
351 return true;
352 } else if (os::Solaris::chained_handler(sig, info, ucVoid)) {
353 return true;
354 } else {
355 // If os::Solaris::SIGasync not chained, and this is a non-vm and
356 // non-java thread
357 return true;
358 }
359 }
360
361 if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) {
362 // can't decode this kind of signal
363 info = NULL;
364 } else {
365 assert(sig == info->si_signo, "bad siginfo");
366 }
367
368 // decide if this trap can be handled by a stub
369 address stub = NULL;
370
371 address pc = NULL;
372 address npc = NULL;
373
374 //%note os_trap_1
375 if (info != NULL && uc != NULL && thread != NULL) {
376 // factor me: getPCfromContext
377 pc = (address) uc->uc_mcontext.gregs[REG_PC];
378 npc = (address) uc->uc_mcontext.gregs[REG_nPC];
379
380 // SafeFetch() support
381 if (StubRoutines::is_safefetch_fault(pc)) {
382 uc->uc_mcontext.gregs[REG_PC] = intptr_t(StubRoutines::continuation_for_safefetch_fault(pc));
383 uc->uc_mcontext.gregs[REG_nPC] = uc->uc_mcontext.gregs[REG_PC] + 4;
384 return 1;
385 }
386
387 // Handle ALL stack overflow variations here
388 if (sig == SIGSEGV && info->si_code == SEGV_ACCERR) {
389 address addr = (address) info->si_addr;
390 if (thread->in_stack_yellow_zone(addr)) {
391 thread->disable_stack_yellow_zone();
392 // Sometimes the register windows are not properly flushed.
393 if(uc->uc_mcontext.gwins != NULL) {
394 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
395 }
396 if (thread->thread_state() == _thread_in_Java) {
397 // Throw a stack overflow exception. Guard pages will be reenabled
398 // while unwinding the stack.
399 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW);
400 } else {
401 // Thread was in the vm or native code. Return and try to finish.
402 return true;
403 }
404 } else if (thread->in_stack_red_zone(addr)) {
405 // Fatal red zone violation. Disable the guard pages and fall through
406 // to handle_unexpected_exception way down below.
407 thread->disable_stack_red_zone();
408 tty->print_raw_cr("An irrecoverable stack overflow has occurred.");
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 }
414 }
415
416
417 if (thread->thread_state() == _thread_in_vm) {
418 if (sig == SIGBUS && info->si_code == BUS_OBJERR && thread->doing_unsafe_access()) {
419 stub = StubRoutines::handler_for_unsafe_access();
420 }
421 }
422
423 else if (thread->thread_state() == _thread_in_Java) {
424 // Java thread running in Java code => find exception handler if any
425 // a fault inside compiled code, the interpreter, or a stub
426
427 // Support Safepoint Polling
428 if ( sig == SIGSEGV && (address)info->si_addr == os::get_polling_page() ) {
429 stub = SharedRuntime::get_poll_stub(pc);
430 }
431
432 // Not needed on x86 solaris because verify_oops doesn't generate
433 // SEGV/BUS like sparc does.
434 if ( (sig == SIGSEGV || sig == SIGBUS)
435 && pc >= MacroAssembler::_verify_oop_implicit_branch[0]
436 && pc < MacroAssembler::_verify_oop_implicit_branch[1] ) {
437 stub = MacroAssembler::_verify_oop_implicit_branch[2];
438 warning("fixed up memory fault in +VerifyOops at address " INTPTR_FORMAT, info->si_addr);
439 }
440
441 // This is not factored because on x86 solaris the patching for
442 // zombies does not generate a SEGV.
443 else if (sig == SIGSEGV && nativeInstruction_at(pc)->is_zombie()) {
444 // zombie method (ld [%g0],%o7 instruction)
445 stub = SharedRuntime::get_handle_wrong_method_stub();
446
447 // At the stub it needs to look like a call from the caller of this
448 // method (not a call from the segv site).
449 pc = (address)uc->uc_mcontext.gregs[REG_O7];
450 }
451 else if (sig == SIGBUS && info->si_code == BUS_OBJERR) {
452 // BugId 4454115: A read from a MappedByteBuffer can fault
453 // here if the underlying file has been truncated.
454 // Do not crash the VM in such a case.
455 CodeBlob* cb = CodeCache::find_blob_unsafe(pc);
456 nmethod* nm = cb->is_nmethod() ? (nmethod*)cb : NULL;
457 if (nm != NULL && nm->has_unsafe_access()) {
458 stub = StubRoutines::handler_for_unsafe_access();
459 }
460 }
461
462 else if (sig == SIGFPE && info->si_code == FPE_INTDIV) {
463 // integer divide by zero
464 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO);
465 }
466 else if (sig == SIGFPE && info->si_code == FPE_FLTDIV) {
467 // floating-point divide by zero
468 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO);
469 }
470 #ifdef COMPILER2
471 else if (sig == SIGILL && nativeInstruction_at(pc)->is_ic_miss_trap()) {
472 #ifdef ASSERT
473 #ifdef TIERED
474 CodeBlob* cb = CodeCache::find_blob_unsafe(pc);
475 assert(cb->is_compiled_by_c2(), "Wrong compiler");
476 #endif // TIERED
477 #endif // ASSERT
478 // Inline cache missed and user trap "Tne G0+ST_RESERVED_FOR_USER_0+2" taken.
479 stub = SharedRuntime::get_ic_miss_stub();
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 #endif // COMPILER2
485
486 else if (sig == SIGSEGV && info->si_code > 0 && !MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) {
487 // Determination of interpreter/vtable stub/compiled code null exception
488 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL);
489 }
490 }
491
492 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in
493 // and the heap gets shrunk before the field access.
494 if ((sig == SIGSEGV) || (sig == SIGBUS)) {
495 address addr = JNI_FastGetField::find_slowcase_pc(pc);
496 if (addr != (address)-1) {
497 stub = addr;
498 }
499 }
500
501 // Check to see if we caught the safepoint code in the
502 // process of write protecting the memory serialization page.
503 // It write enables the page immediately after protecting it
504 // so just return.
505 if ((sig == SIGSEGV) &&
506 os::is_memory_serialize_page(thread, (address)info->si_addr)) {
507 // Block current thread until the memory serialize page permission restored.
508 os::block_on_serialize_page_trap();
509 return true;
510 }
511 }
512
513 if (stub != NULL) {
514 // save all thread context in case we need to restore it
515
516 thread->set_saved_exception_pc(pc);
517 thread->set_saved_exception_npc(npc);
518
519 // simulate a branch to the stub (a "call" in the safepoint stub case)
520 // factor me: setPC
521 uc->uc_mcontext.gregs[REG_PC ] = (greg_t)stub;
522 uc->uc_mcontext.gregs[REG_nPC] = (greg_t)(stub + 4);
523
524 #ifndef PRODUCT
525 if (TraceJumps) thread->record_jump(stub, NULL, __FILE__, __LINE__);
526 #endif /* PRODUCT */
527
528 return true;
529 }
530
531 // signal-chaining
532 if (os::Solaris::chained_handler(sig, info, ucVoid)) {
533 return true;
534 }
535
536 if (!abort_if_unrecognized) {
537 // caller wants another chance, so give it to him
538 return false;
539 }
540
541 if (!os::Solaris::libjsig_is_loaded) {
542 struct sigaction oldAct;
543 sigaction(sig, (struct sigaction *)0, &oldAct);
544 if (oldAct.sa_sigaction != signalHandler) {
545 void* sighand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
546 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
547 warning("Unexpected Signal %d occurred under user-defined signal handler " INTPTR_FORMAT, sig, (intptr_t)sighand);
548 }
549 }
550
551 if (pc == NULL && uc != NULL) {
552 pc = (address) uc->uc_mcontext.gregs[REG_PC];
553 }
554
555 // Sometimes the register windows are not properly flushed.
556 if(uc->uc_mcontext.gwins != NULL) {
557 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
558 }
559
560 // unmask current signal
561 sigset_t newset;
562 sigemptyset(&newset);
563 sigaddset(&newset, sig);
564 sigprocmask(SIG_UNBLOCK, &newset, NULL);
565
566 // Determine which sort of error to throw. Out of swap may signal
567 // on the thread stack, which could get a mapping error when touched.
568 address addr = (address) info->si_addr;
569 if (sig == SIGBUS && info->si_code == BUS_OBJERR && info->si_errno == ENOMEM) {
570 vm_exit_out_of_memory(0, OOM_MMAP_ERROR, "Out of swap space to map in thread stack.");
571 }
572
573 VMError err(t, sig, pc, info, ucVoid);
574 err.report_and_die();
575
576 ShouldNotReachHere();
577 }
578
579 void os::print_context(outputStream *st, void *context) {
580 if (context == NULL) return;
581
582 ucontext_t *uc = (ucontext_t*)context;
583 st->print_cr("Registers:");
584
585 st->print_cr(" G1=" INTPTR_FORMAT " G2=" INTPTR_FORMAT
586 " G3=" INTPTR_FORMAT " G4=" INTPTR_FORMAT,
587 uc->uc_mcontext.gregs[REG_G1],
588 uc->uc_mcontext.gregs[REG_G2],
589 uc->uc_mcontext.gregs[REG_G3],
590 uc->uc_mcontext.gregs[REG_G4]);
591 st->print_cr(" G5=" INTPTR_FORMAT " G6=" INTPTR_FORMAT
592 " G7=" INTPTR_FORMAT " Y=" INTPTR_FORMAT,
593 uc->uc_mcontext.gregs[REG_G5],
594 uc->uc_mcontext.gregs[REG_G6],
595 uc->uc_mcontext.gregs[REG_G7],
596 uc->uc_mcontext.gregs[REG_Y]);
597 st->print_cr(" O0=" INTPTR_FORMAT " O1=" INTPTR_FORMAT
598 " O2=" INTPTR_FORMAT " O3=" INTPTR_FORMAT,
599 uc->uc_mcontext.gregs[REG_O0],
600 uc->uc_mcontext.gregs[REG_O1],
601 uc->uc_mcontext.gregs[REG_O2],
602 uc->uc_mcontext.gregs[REG_O3]);
603 st->print_cr(" O4=" INTPTR_FORMAT " O5=" INTPTR_FORMAT
604 " O6=" INTPTR_FORMAT " O7=" INTPTR_FORMAT,
605 uc->uc_mcontext.gregs[REG_O4],
606 uc->uc_mcontext.gregs[REG_O5],
607 uc->uc_mcontext.gregs[REG_O6],
608 uc->uc_mcontext.gregs[REG_O7]);
609
610
611 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc);
612 st->print_cr(" L0=" INTPTR_FORMAT " L1=" INTPTR_FORMAT
613 " L2=" INTPTR_FORMAT " L3=" INTPTR_FORMAT,
614 sp[L0->sp_offset_in_saved_window()],
615 sp[L1->sp_offset_in_saved_window()],
616 sp[L2->sp_offset_in_saved_window()],
617 sp[L3->sp_offset_in_saved_window()]);
618 st->print_cr(" L4=" INTPTR_FORMAT " L5=" INTPTR_FORMAT
619 " L6=" INTPTR_FORMAT " L7=" INTPTR_FORMAT,
620 sp[L4->sp_offset_in_saved_window()],
621 sp[L5->sp_offset_in_saved_window()],
622 sp[L6->sp_offset_in_saved_window()],
623 sp[L7->sp_offset_in_saved_window()]);
624 st->print_cr(" I0=" INTPTR_FORMAT " I1=" INTPTR_FORMAT
625 " I2=" INTPTR_FORMAT " I3=" INTPTR_FORMAT,
626 sp[I0->sp_offset_in_saved_window()],
627 sp[I1->sp_offset_in_saved_window()],
628 sp[I2->sp_offset_in_saved_window()],
629 sp[I3->sp_offset_in_saved_window()]);
630 st->print_cr(" I4=" INTPTR_FORMAT " I5=" INTPTR_FORMAT
631 " I6=" INTPTR_FORMAT " I7=" INTPTR_FORMAT,
632 sp[I4->sp_offset_in_saved_window()],
633 sp[I5->sp_offset_in_saved_window()],
634 sp[I6->sp_offset_in_saved_window()],
635 sp[I7->sp_offset_in_saved_window()]);
636
637 st->print_cr(" PC=" INTPTR_FORMAT " nPC=" INTPTR_FORMAT,
638 uc->uc_mcontext.gregs[REG_PC],
639 uc->uc_mcontext.gregs[REG_nPC]);
640 st->cr();
641 st->cr();
642
643 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp);
644 print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t));
645 st->cr();
646
647 // Note: it may be unsafe to inspect memory near pc. For example, pc may
648 // point to garbage if entry point in an nmethod is corrupted. Leave
649 // this at the end, and hope for the best.
650 ExtendedPC epc = os::Solaris::ucontext_get_ExtendedPC(uc);
651 address pc = epc.pc();
652 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc);
653 print_hex_dump(st, pc - 32, pc + 32, sizeof(char));
654 }
655
656 void os::print_register_info(outputStream *st, void *context) {
657 if (context == NULL) return;
658
659 ucontext_t *uc = (ucontext_t*)context;
660 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc);
661
662 st->print_cr("Register to memory mapping:");
663 st->cr();
664
665 // this is only for the "general purpose" registers
666 st->print("G1="); print_location(st, uc->uc_mcontext.gregs[REG_G1]);
667 st->print("G2="); print_location(st, uc->uc_mcontext.gregs[REG_G2]);
668 st->print("G3="); print_location(st, uc->uc_mcontext.gregs[REG_G3]);
669 st->print("G4="); print_location(st, uc->uc_mcontext.gregs[REG_G4]);
670 st->print("G5="); print_location(st, uc->uc_mcontext.gregs[REG_G5]);
671 st->print("G6="); print_location(st, uc->uc_mcontext.gregs[REG_G6]);
672 st->print("G7="); print_location(st, uc->uc_mcontext.gregs[REG_G7]);
673 st->cr();
674
675 st->print("O0="); print_location(st, uc->uc_mcontext.gregs[REG_O0]);
676 st->print("O1="); print_location(st, uc->uc_mcontext.gregs[REG_O1]);
677 st->print("O2="); print_location(st, uc->uc_mcontext.gregs[REG_O2]);
678 st->print("O3="); print_location(st, uc->uc_mcontext.gregs[REG_O3]);
679 st->print("O4="); print_location(st, uc->uc_mcontext.gregs[REG_O4]);
680 st->print("O5="); print_location(st, uc->uc_mcontext.gregs[REG_O5]);
681 st->print("O6="); print_location(st, uc->uc_mcontext.gregs[REG_O6]);
682 st->print("O7="); print_location(st, uc->uc_mcontext.gregs[REG_O7]);
683 st->cr();
684
685 st->print("L0="); print_location(st, sp[L0->sp_offset_in_saved_window()]);
686 st->print("L1="); print_location(st, sp[L1->sp_offset_in_saved_window()]);
687 st->print("L2="); print_location(st, sp[L2->sp_offset_in_saved_window()]);
688 st->print("L3="); print_location(st, sp[L3->sp_offset_in_saved_window()]);
689 st->print("L4="); print_location(st, sp[L4->sp_offset_in_saved_window()]);
690 st->print("L5="); print_location(st, sp[L5->sp_offset_in_saved_window()]);
691 st->print("L6="); print_location(st, sp[L6->sp_offset_in_saved_window()]);
692 st->print("L7="); print_location(st, sp[L7->sp_offset_in_saved_window()]);
693 st->cr();
694
695 st->print("I0="); print_location(st, sp[I0->sp_offset_in_saved_window()]);
696 st->print("I1="); print_location(st, sp[I1->sp_offset_in_saved_window()]);
697 st->print("I2="); print_location(st, sp[I2->sp_offset_in_saved_window()]);
698 st->print("I3="); print_location(st, sp[I3->sp_offset_in_saved_window()]);
699 st->print("I4="); print_location(st, sp[I4->sp_offset_in_saved_window()]);
700 st->print("I5="); print_location(st, sp[I5->sp_offset_in_saved_window()]);
701 st->print("I6="); print_location(st, sp[I6->sp_offset_in_saved_window()]);
702 st->print("I7="); print_location(st, sp[I7->sp_offset_in_saved_window()]);
703 st->cr();
704 }
705
706 void os::Solaris::init_thread_fpu_state(void) {
707 // Nothing needed on Sparc.
708 }
709
710 #if !defined(COMPILER2) && !defined(_LP64)
711
712 // These routines are the initial value of atomic_xchg_entry(),
713 // atomic_cmpxchg_entry(), atomic_add_entry() and fence_entry()
714 // until initialization is complete.
715 // TODO - remove when the VM drops support for V8.
716
717 typedef jint xchg_func_t (jint, volatile jint*);
718 typedef jint cmpxchg_func_t (jint, volatile jint*, jint);
719 typedef jlong cmpxchg_long_func_t(jlong, volatile jlong*, jlong);
720 typedef jint add_func_t (jint, volatile jint*);
721
722 jint os::atomic_xchg_bootstrap(jint exchange_value, volatile jint* dest) {
723 // try to use the stub:
724 xchg_func_t* func = CAST_TO_FN_PTR(xchg_func_t*, StubRoutines::atomic_xchg_entry());
725
726 if (func != NULL) {
727 os::atomic_xchg_func = func;
728 return (*func)(exchange_value, dest);
729 }
730 assert(Threads::number_of_threads() == 0, "for bootstrap only");
731
732 jint old_value = *dest;
733 *dest = exchange_value;
734 return old_value;
735 }
736
737 jint os::atomic_cmpxchg_bootstrap(jint exchange_value, volatile jint* dest, jint compare_value) {
738 // try to use the stub:
739 cmpxchg_func_t* func = CAST_TO_FN_PTR(cmpxchg_func_t*, StubRoutines::atomic_cmpxchg_entry());
740
741 if (func != NULL) {
742 os::atomic_cmpxchg_func = func;
743 return (*func)(exchange_value, dest, compare_value);
744 }
745 assert(Threads::number_of_threads() == 0, "for bootstrap only");
746
747 jint old_value = *dest;
748 if (old_value == compare_value)
749 *dest = exchange_value;
750 return old_value;
751 }
752
753 jlong os::atomic_cmpxchg_long_bootstrap(jlong exchange_value, volatile jlong* dest, jlong compare_value) {
754 // try to use the stub:
755 cmpxchg_long_func_t* func = CAST_TO_FN_PTR(cmpxchg_long_func_t*, StubRoutines::atomic_cmpxchg_long_entry());
756
757 if (func != NULL) {
758 os::atomic_cmpxchg_long_func = func;
759 return (*func)(exchange_value, dest, compare_value);
760 }
761 assert(Threads::number_of_threads() == 0, "for bootstrap only");
762
763 jlong old_value = *dest;
764 if (old_value == compare_value)
765 *dest = exchange_value;
766 return old_value;
767 }
768
769 jint os::atomic_add_bootstrap(jint add_value, volatile jint* dest) {
770 // try to use the stub:
771 add_func_t* func = CAST_TO_FN_PTR(add_func_t*, StubRoutines::atomic_add_entry());
772
773 if (func != NULL) {
774 os::atomic_add_func = func;
775 return (*func)(add_value, dest);
776 }
777 assert(Threads::number_of_threads() == 0, "for bootstrap only");
778
779 return (*dest) += add_value;
780 }
781
782 xchg_func_t* os::atomic_xchg_func = os::atomic_xchg_bootstrap;
783 cmpxchg_func_t* os::atomic_cmpxchg_func = os::atomic_cmpxchg_bootstrap;
784 cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap;
785 add_func_t* os::atomic_add_func = os::atomic_add_bootstrap;
786
787 #endif // !_LP64 && !COMPILER2
788
789 #if defined(__sparc) && defined(COMPILER2) && defined(_GNU_SOURCE)
790 // See file build/solaris/makefiles/$compiler.make
791 // For compiler1 the architecture is v8 and frps isn't present in v8
792 extern "C" void _mark_fpu_nosave() {
793 __asm__ __volatile__ ("wr %%g0, 0, %%fprs \n\t" : : :);
794 }
795 #endif //defined(__sparc) && defined(COMPILER2)
796
797 #ifndef PRODUCT
798 void os::verify_stack_alignment() {
799 }
800 #endif