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