1 /*
2 * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 // no precompiled headers
26 #include "asm/macroAssembler.hpp"
27 #include "macroAssembler_sparc.hpp"
28 #include "classfile/classLoader.hpp"
29 #include "classfile/systemDictionary.hpp"
30 #include "classfile/vmSymbols.hpp"
31 #include "code/codeCache.hpp"
32 #include "code/icBuffer.hpp"
33 #include "code/vtableStubs.hpp"
34 #include "interpreter/interpreter.hpp"
35 #include "jvm_solaris.h"
36 #include "memory/allocation.inline.hpp"
37 #include "mutex_solaris.inline.hpp"
38 #include "nativeInst_sparc.hpp"
39 #include "os_share_solaris.hpp"
40 #include "prims/jniFastGetField.hpp"
41 #include "prims/jvm.h"
42 #include "prims/jvm_misc.hpp"
43 #include "runtime/arguments.hpp"
44 #include "runtime/extendedPC.hpp"
45 #include "runtime/frame.inline.hpp"
46 #include "runtime/interfaceSupport.hpp"
47 #include "runtime/java.hpp"
48 #include "runtime/javaCalls.hpp"
49 #include "runtime/mutexLocker.hpp"
50 #include "runtime/osThread.hpp"
51 #include "runtime/sharedRuntime.hpp"
52 #include "runtime/stubRoutines.hpp"
53 #include "runtime/thread.inline.hpp"
54 #include "runtime/timer.hpp"
55 #include "utilities/events.hpp"
56 #include "utilities/vmError.hpp"
57
58 # include <signal.h> // needed first to avoid name collision for "std" with SC 5.0
59
60 // put OS-includes here
61 # include <sys/types.h>
62 # include <sys/mman.h>
63 # include <pthread.h>
64 # include <errno.h>
65 # include <dlfcn.h>
66 # include <stdio.h>
67 # include <unistd.h>
68 # include <sys/resource.h>
69 # include <thread.h>
70 # include <sys/stat.h>
71 # include <sys/time.h>
72 # include <sys/filio.h>
73 # include <sys/utsname.h>
74 # include <sys/systeminfo.h>
75 # include <sys/socket.h>
76 # include <sys/lwp.h>
77 # include <pwd.h>
78 # include <poll.h>
79 # include <sys/lwp.h>
80
81 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later
82 # include <sys/procfs.h> // see comment in <sys/procfs.h>
83
84 #define MAX_PATH (2 * K)
85
86 // Minimum stack size for the VM. It's easier to document a constant
87 // but it's different for x86 and sparc because the page sizes are different.
88 #ifdef _LP64
89 size_t os::Solaris::min_stack_allowed = 128*K;
90 #else
91 size_t os::Solaris::min_stack_allowed = 96*K;
92 #endif
93
94 int os::Solaris::max_register_window_saves_before_flushing() {
95 // We should detect this at run time. For now, filling
96 // in with a constant.
97 return 8;
98 }
99
100 static void handle_unflushed_register_windows(gwindows_t *win) {
101 int restore_count = win->wbcnt;
102 int i;
103
104 for(i=0; i<restore_count; i++) {
105 address sp = ((address)win->spbuf[i]) + STACK_BIAS;
106 address reg_win = (address)&win->wbuf[i];
107 memcpy(sp,reg_win,sizeof(struct rwindow));
108 }
109 }
110
111 char* os::non_memory_address_word() {
112 // Must never look like an address returned by reserve_memory,
113 // even in its subfields (as defined by the CPU immediate fields,
114 // if the CPU splits constants across multiple instructions).
115 // On SPARC, 0 != %hi(any real address), because there is no
116 // allocation in the first 1Kb of the virtual address space.
117 return (char*) 0;
118 }
119
120 // Validate a ucontext retrieved from walking a uc_link of a ucontext.
121 // There are issues with libthread giving out uc_links for different threads
122 // on the same uc_link chain and bad or circular links.
123 //
124 bool os::Solaris::valid_ucontext(Thread* thread, ucontext_t* valid, ucontext_t* suspect) {
125 if (valid >= suspect ||
126 valid->uc_stack.ss_flags != suspect->uc_stack.ss_flags ||
127 valid->uc_stack.ss_sp != suspect->uc_stack.ss_sp ||
128 valid->uc_stack.ss_size != suspect->uc_stack.ss_size) {
129 DEBUG_ONLY(tty->print_cr("valid_ucontext: failed test 1");)
130 return false;
131 }
132
133 if (thread->is_Java_thread()) {
134 if (!valid_stack_address(thread, (address)suspect)) {
135 DEBUG_ONLY(tty->print_cr("valid_ucontext: uc_link not in thread stack");)
136 return false;
137 }
138 address _sp = (address)((intptr_t)suspect->uc_mcontext.gregs[REG_SP] + STACK_BIAS);
139 if (!valid_stack_address(thread, _sp) ||
140 !frame::is_valid_stack_pointer(((JavaThread*)thread)->base_of_stack_pointer(), (intptr_t*)_sp)) {
141 DEBUG_ONLY(tty->print_cr("valid_ucontext: stackpointer not in thread stack");)
142 return false;
143 }
144 }
145 return true;
146 }
147
148 // We will only follow one level of uc_link since there are libthread
149 // issues with ucontext linking and it is better to be safe and just
150 // let caller retry later.
151 ucontext_t* os::Solaris::get_valid_uc_in_signal_handler(Thread *thread,
152 ucontext_t *uc) {
153
154 ucontext_t *retuc = NULL;
155
156 // Sometimes the topmost register windows are not properly flushed.
157 // i.e., if the kernel would have needed to take a page fault
158 if (uc != NULL && uc->uc_mcontext.gwins != NULL) {
159 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
160 }
161
162 if (uc != NULL) {
163 if (uc->uc_link == NULL) {
164 // cannot validate without uc_link so accept current ucontext
165 retuc = uc;
166 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) {
167 // first ucontext is valid so try the next one
168 uc = uc->uc_link;
169 if (uc->uc_link == NULL) {
170 // cannot validate without uc_link so accept current ucontext
171 retuc = uc;
172 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) {
173 // the ucontext one level down is also valid so return it
174 retuc = uc;
175 }
176 }
177 }
178 return retuc;
179 }
180
181 // Assumes ucontext is valid
182 ExtendedPC os::Solaris::ucontext_get_ExtendedPC(ucontext_t *uc) {
183 address pc = (address)uc->uc_mcontext.gregs[REG_PC];
184 // set npc to zero to avoid using it for safepoint, good for profiling only
185 return ExtendedPC(pc);
186 }
187
188 void os::Solaris::ucontext_set_pc(ucontext_t* uc, address pc) {
189 uc->uc_mcontext.gregs [REG_PC] = (greg_t) pc;
190 uc->uc_mcontext.gregs [REG_nPC] = (greg_t) (pc + 4);
191 }
192
193 // Assumes ucontext is valid
194 intptr_t* os::Solaris::ucontext_get_sp(ucontext_t *uc) {
195 return (intptr_t*)((intptr_t)uc->uc_mcontext.gregs[REG_SP] + STACK_BIAS);
196 }
197
198 // Solaris X86 only
199 intptr_t* os::Solaris::ucontext_get_fp(ucontext_t *uc) {
200 ShouldNotReachHere();
201 return NULL;
202 }
203
204 address os::Solaris::ucontext_get_pc(ucontext_t *uc) {
205 return (address) uc->uc_mcontext.gregs[REG_PC];
206 }
207
208
209 // For Forte Analyzer AsyncGetCallTrace profiling support - thread
210 // is currently interrupted by SIGPROF.
211 //
212 // ret_fp parameter is only used by Solaris X86.
213 //
214 // The difference between this and os::fetch_frame_from_context() is that
215 // here we try to skip nested signal frames.
216 ExtendedPC os::Solaris::fetch_frame_from_ucontext(Thread* thread,
217 ucontext_t* uc, intptr_t** ret_sp, intptr_t** ret_fp) {
218
219 assert(thread != NULL, "just checking");
220 assert(ret_sp != NULL, "just checking");
221 assert(ret_fp == NULL, "just checking");
222
223 ucontext_t *luc = os::Solaris::get_valid_uc_in_signal_handler(thread, uc);
224
225 return os::fetch_frame_from_context(luc, ret_sp, ret_fp);
226 }
227
228
229 // ret_fp parameter is only used by Solaris X86.
230 ExtendedPC os::fetch_frame_from_context(void* ucVoid,
231 intptr_t** ret_sp, intptr_t** ret_fp) {
232
233 ExtendedPC epc;
234 ucontext_t *uc = (ucontext_t*)ucVoid;
235
236 if (uc != NULL) {
237 epc = os::Solaris::ucontext_get_ExtendedPC(uc);
238 if (ret_sp) *ret_sp = os::Solaris::ucontext_get_sp(uc);
239 } else {
240 // construct empty ExtendedPC for return value checking
241 epc = ExtendedPC(NULL);
242 if (ret_sp) *ret_sp = (intptr_t *)NULL;
243 }
244
245 return epc;
246 }
247
248 frame os::fetch_frame_from_context(void* ucVoid) {
249 intptr_t* sp;
250 intptr_t* fp;
251 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp);
252 return frame(sp, frame::unpatchable, epc.pc());
253 }
254
255 frame os::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 = Thread::current();
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 if (sig == os::Solaris::SIGasync()) {
329 if (thread || vmthread) {
330 OSThread::SR_handler(t, uc);
331 return true;
332 } else if (os::Solaris::chained_handler(sig, info, ucVoid)) {
333 return true;
334 } else {
335 // If os::Solaris::SIGasync not chained, and this is a non-vm and
336 // non-java thread
337 return true;
338 }
339 }
340
341 if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) {
342 // can't decode this kind of signal
343 info = NULL;
344 } else {
345 assert(sig == info->si_signo, "bad siginfo");
346 }
347
348 // decide if this trap can be handled by a stub
349 address stub = NULL;
350
351 address pc = NULL;
352 address npc = NULL;
353
354 //%note os_trap_1
355 if (info != NULL && uc != NULL && thread != NULL) {
356 // factor me: getPCfromContext
357 pc = (address) uc->uc_mcontext.gregs[REG_PC];
358 npc = (address) uc->uc_mcontext.gregs[REG_nPC];
359
360 // SafeFetch() support
361 if (StubRoutines::is_safefetch_fault(pc)) {
362 os::Solaris::ucontext_set_pc(uc, StubRoutines::continuation_for_safefetch_fault(pc));
363 return 1;
364 }
365
366 // Handle ALL stack overflow variations here
367 if (sig == SIGSEGV && info->si_code == SEGV_ACCERR) {
368 address addr = (address) info->si_addr;
369 if (thread->in_stack_yellow_zone(addr)) {
370 thread->disable_stack_yellow_zone();
371 // Sometimes the register windows are not properly flushed.
372 if(uc->uc_mcontext.gwins != NULL) {
373 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
374 }
375 if (thread->thread_state() == _thread_in_Java) {
376 // Throw a stack overflow exception. Guard pages will be reenabled
377 // while unwinding the stack.
378 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW);
379 } else {
380 // Thread was in the vm or native code. Return and try to finish.
381 return true;
382 }
383 } else if (thread->in_stack_red_zone(addr)) {
384 // Fatal red zone violation. Disable the guard pages and fall through
385 // to handle_unexpected_exception way down below.
386 thread->disable_stack_red_zone();
387 tty->print_raw_cr("An irrecoverable stack overflow has occurred.");
388 // Sometimes the register windows are not properly flushed.
389 if(uc->uc_mcontext.gwins != NULL) {
390 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
391 }
392 }
393 }
394
395
396 if (thread->thread_state() == _thread_in_vm) {
397 if (sig == SIGBUS && info->si_code == BUS_OBJERR && thread->doing_unsafe_access()) {
398 stub = StubRoutines::handler_for_unsafe_access();
399 }
400 }
401
402 else if (thread->thread_state() == _thread_in_Java) {
403 // Java thread running in Java code => find exception handler if any
404 // a fault inside compiled code, the interpreter, or a stub
405
406 // Support Safepoint Polling
407 if ( sig == SIGSEGV && (address)info->si_addr == os::get_polling_page() ) {
408 stub = SharedRuntime::get_poll_stub(pc);
409 }
410
411 // Not needed on x86 solaris because verify_oops doesn't generate
412 // SEGV/BUS like sparc does.
413 if ( (sig == SIGSEGV || sig == SIGBUS)
414 && pc >= MacroAssembler::_verify_oop_implicit_branch[0]
415 && pc < MacroAssembler::_verify_oop_implicit_branch[1] ) {
416 stub = MacroAssembler::_verify_oop_implicit_branch[2];
417 warning("fixed up memory fault in +VerifyOops at address " INTPTR_FORMAT, info->si_addr);
418 }
419
420 // This is not factored because on x86 solaris the patching for
421 // zombies does not generate a SEGV.
422 else if (sig == SIGSEGV && nativeInstruction_at(pc)->is_zombie()) {
423 // zombie method (ld [%g0],%o7 instruction)
424 stub = SharedRuntime::get_handle_wrong_method_stub();
425
426 // At the stub it needs to look like a call from the caller of this
427 // method (not a call from the segv site).
428 pc = (address)uc->uc_mcontext.gregs[REG_O7];
429 }
430 else if (sig == SIGBUS && info->si_code == BUS_OBJERR) {
431 // BugId 4454115: A read from a MappedByteBuffer can fault
432 // here if the underlying file has been truncated.
433 // Do not crash the VM in such a case.
434 CodeBlob* cb = CodeCache::find_blob_unsafe(pc);
435 nmethod* nm = cb->is_nmethod() ? (nmethod*)cb : NULL;
436 if (nm != NULL && nm->has_unsafe_access()) {
437 stub = StubRoutines::handler_for_unsafe_access();
438 }
439 }
440
441 else if (sig == SIGFPE && info->si_code == FPE_INTDIV) {
442 // integer divide by zero
443 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO);
444 }
445 else if (sig == SIGFPE && info->si_code == FPE_FLTDIV) {
446 // floating-point divide by zero
447 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO);
448 }
449 #ifdef COMPILER2
450 else if (sig == SIGILL && nativeInstruction_at(pc)->is_ic_miss_trap()) {
451 #ifdef ASSERT
452 #ifdef TIERED
453 CodeBlob* cb = CodeCache::find_blob_unsafe(pc);
454 assert(cb->is_compiled_by_c2(), "Wrong compiler");
455 #endif // TIERED
456 #endif // ASSERT
457 // Inline cache missed and user trap "Tne G0+ST_RESERVED_FOR_USER_0+2" taken.
458 stub = SharedRuntime::get_ic_miss_stub();
459 // At the stub it needs to look like a call from the caller of this
460 // method (not a call from the segv site).
461 pc = (address)uc->uc_mcontext.gregs[REG_O7];
462 }
463 #endif // COMPILER2
464
465 else if (sig == SIGSEGV && info->si_code > 0 && !MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) {
466 // Determination of interpreter/vtable stub/compiled code null exception
467 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL);
468 }
469 }
470
471 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in
472 // and the heap gets shrunk before the field access.
473 if ((sig == SIGSEGV) || (sig == SIGBUS)) {
474 address addr = JNI_FastGetField::find_slowcase_pc(pc);
475 if (addr != (address)-1) {
476 stub = addr;
477 }
478 }
479
480 // Check to see if we caught the safepoint code in the
481 // process of write protecting the memory serialization page.
482 // It write enables the page immediately after protecting it
483 // so just return.
484 if ((sig == SIGSEGV) &&
485 os::is_memory_serialize_page(thread, (address)info->si_addr)) {
486 // Block current thread until the memory serialize page permission restored.
487 os::block_on_serialize_page_trap();
488 return true;
489 }
490 }
491
492 if (stub != NULL) {
493 // save all thread context in case we need to restore it
494
495 thread->set_saved_exception_pc(pc);
496 thread->set_saved_exception_npc(npc);
497
498 // simulate a branch to the stub (a "call" in the safepoint stub case)
499 // factor me: setPC
500 os::Solaris::ucontext_set_pc(uc, stub);
501
502 #ifndef PRODUCT
503 if (TraceJumps) thread->record_jump(stub, NULL, __FILE__, __LINE__);
504 #endif /* PRODUCT */
505
506 return true;
507 }
508
509 // signal-chaining
510 if (os::Solaris::chained_handler(sig, info, ucVoid)) {
511 return true;
512 }
513
514 if (!abort_if_unrecognized) {
515 // caller wants another chance, so give it to him
516 return false;
517 }
518
519 if (!os::Solaris::libjsig_is_loaded) {
520 struct sigaction oldAct;
521 sigaction(sig, (struct sigaction *)0, &oldAct);
522 if (oldAct.sa_sigaction != signalHandler) {
523 void* sighand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
524 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
525 warning("Unexpected Signal %d occurred under user-defined signal handler " INTPTR_FORMAT, sig, (intptr_t)sighand);
526 }
527 }
528
529 if (pc == NULL && uc != NULL) {
530 pc = (address) uc->uc_mcontext.gregs[REG_PC];
531 }
532
533 // Sometimes the register windows are not properly flushed.
534 if(uc->uc_mcontext.gwins != NULL) {
535 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins);
536 }
537
538 // unmask current signal
539 sigset_t newset;
540 sigemptyset(&newset);
541 sigaddset(&newset, sig);
542 sigprocmask(SIG_UNBLOCK, &newset, NULL);
543
544 // Determine which sort of error to throw. Out of swap may signal
545 // on the thread stack, which could get a mapping error when touched.
546 address addr = (address) info->si_addr;
547 if (sig == SIGBUS && info->si_code == BUS_OBJERR && info->si_errno == ENOMEM) {
548 vm_exit_out_of_memory(0, OOM_MMAP_ERROR, "Out of swap space to map in thread stack.");
549 }
550
551 VMError::report_and_die(t, sig, pc, info, ucVoid);
552
553 ShouldNotReachHere();
554 }
555
556 void os::print_context(outputStream *st, void *context) {
557 if (context == NULL) return;
558
559 ucontext_t *uc = (ucontext_t*)context;
560 st->print_cr("Registers:");
561
562 st->print_cr(" G1=" INTPTR_FORMAT " G2=" INTPTR_FORMAT
563 " G3=" INTPTR_FORMAT " G4=" INTPTR_FORMAT,
564 uc->uc_mcontext.gregs[REG_G1],
565 uc->uc_mcontext.gregs[REG_G2],
566 uc->uc_mcontext.gregs[REG_G3],
567 uc->uc_mcontext.gregs[REG_G4]);
568 st->print_cr(" G5=" INTPTR_FORMAT " G6=" INTPTR_FORMAT
569 " G7=" INTPTR_FORMAT " Y=" INTPTR_FORMAT,
570 uc->uc_mcontext.gregs[REG_G5],
571 uc->uc_mcontext.gregs[REG_G6],
572 uc->uc_mcontext.gregs[REG_G7],
573 uc->uc_mcontext.gregs[REG_Y]);
574 st->print_cr(" O0=" INTPTR_FORMAT " O1=" INTPTR_FORMAT
575 " O2=" INTPTR_FORMAT " O3=" INTPTR_FORMAT,
576 uc->uc_mcontext.gregs[REG_O0],
577 uc->uc_mcontext.gregs[REG_O1],
578 uc->uc_mcontext.gregs[REG_O2],
579 uc->uc_mcontext.gregs[REG_O3]);
580 st->print_cr(" O4=" INTPTR_FORMAT " O5=" INTPTR_FORMAT
581 " O6=" INTPTR_FORMAT " O7=" INTPTR_FORMAT,
582 uc->uc_mcontext.gregs[REG_O4],
583 uc->uc_mcontext.gregs[REG_O5],
584 uc->uc_mcontext.gregs[REG_O6],
585 uc->uc_mcontext.gregs[REG_O7]);
586
587
588 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc);
589 st->print_cr(" L0=" INTPTR_FORMAT " L1=" INTPTR_FORMAT
590 " L2=" INTPTR_FORMAT " L3=" INTPTR_FORMAT,
591 sp[L0->sp_offset_in_saved_window()],
592 sp[L1->sp_offset_in_saved_window()],
593 sp[L2->sp_offset_in_saved_window()],
594 sp[L3->sp_offset_in_saved_window()]);
595 st->print_cr(" L4=" INTPTR_FORMAT " L5=" INTPTR_FORMAT
596 " L6=" INTPTR_FORMAT " L7=" INTPTR_FORMAT,
597 sp[L4->sp_offset_in_saved_window()],
598 sp[L5->sp_offset_in_saved_window()],
599 sp[L6->sp_offset_in_saved_window()],
600 sp[L7->sp_offset_in_saved_window()]);
601 st->print_cr(" I0=" INTPTR_FORMAT " I1=" INTPTR_FORMAT
602 " I2=" INTPTR_FORMAT " I3=" INTPTR_FORMAT,
603 sp[I0->sp_offset_in_saved_window()],
604 sp[I1->sp_offset_in_saved_window()],
605 sp[I2->sp_offset_in_saved_window()],
606 sp[I3->sp_offset_in_saved_window()]);
607 st->print_cr(" I4=" INTPTR_FORMAT " I5=" INTPTR_FORMAT
608 " I6=" INTPTR_FORMAT " I7=" INTPTR_FORMAT,
609 sp[I4->sp_offset_in_saved_window()],
610 sp[I5->sp_offset_in_saved_window()],
611 sp[I6->sp_offset_in_saved_window()],
612 sp[I7->sp_offset_in_saved_window()]);
613
614 st->print_cr(" PC=" INTPTR_FORMAT " nPC=" INTPTR_FORMAT,
615 uc->uc_mcontext.gregs[REG_PC],
616 uc->uc_mcontext.gregs[REG_nPC]);
617 st->cr();
618 st->cr();
619
620 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp);
621 print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t));
622 st->cr();
623
624 // Note: it may be unsafe to inspect memory near pc. For example, pc may
625 // point to garbage if entry point in an nmethod is corrupted. Leave
626 // this at the end, and hope for the best.
627 ExtendedPC epc = os::Solaris::ucontext_get_ExtendedPC(uc);
628 address pc = epc.pc();
629 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc);
630 print_hex_dump(st, pc - 32, pc + 32, sizeof(char));
631 }
632
633 void os::print_register_info(outputStream *st, void *context) {
634 if (context == NULL) return;
635
636 ucontext_t *uc = (ucontext_t*)context;
637 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc);
638
639 st->print_cr("Register to memory mapping:");
640 st->cr();
641
642 // this is only for the "general purpose" registers
643 st->print("G1="); print_location(st, uc->uc_mcontext.gregs[REG_G1]);
644 st->print("G2="); print_location(st, uc->uc_mcontext.gregs[REG_G2]);
645 st->print("G3="); print_location(st, uc->uc_mcontext.gregs[REG_G3]);
646 st->print("G4="); print_location(st, uc->uc_mcontext.gregs[REG_G4]);
647 st->print("G5="); print_location(st, uc->uc_mcontext.gregs[REG_G5]);
648 st->print("G6="); print_location(st, uc->uc_mcontext.gregs[REG_G6]);
649 st->print("G7="); print_location(st, uc->uc_mcontext.gregs[REG_G7]);
650 st->cr();
651
652 st->print("O0="); print_location(st, uc->uc_mcontext.gregs[REG_O0]);
653 st->print("O1="); print_location(st, uc->uc_mcontext.gregs[REG_O1]);
654 st->print("O2="); print_location(st, uc->uc_mcontext.gregs[REG_O2]);
655 st->print("O3="); print_location(st, uc->uc_mcontext.gregs[REG_O3]);
656 st->print("O4="); print_location(st, uc->uc_mcontext.gregs[REG_O4]);
657 st->print("O5="); print_location(st, uc->uc_mcontext.gregs[REG_O5]);
658 st->print("O6="); print_location(st, uc->uc_mcontext.gregs[REG_O6]);
659 st->print("O7="); print_location(st, uc->uc_mcontext.gregs[REG_O7]);
660 st->cr();
661
662 st->print("L0="); print_location(st, sp[L0->sp_offset_in_saved_window()]);
663 st->print("L1="); print_location(st, sp[L1->sp_offset_in_saved_window()]);
664 st->print("L2="); print_location(st, sp[L2->sp_offset_in_saved_window()]);
665 st->print("L3="); print_location(st, sp[L3->sp_offset_in_saved_window()]);
666 st->print("L4="); print_location(st, sp[L4->sp_offset_in_saved_window()]);
667 st->print("L5="); print_location(st, sp[L5->sp_offset_in_saved_window()]);
668 st->print("L6="); print_location(st, sp[L6->sp_offset_in_saved_window()]);
669 st->print("L7="); print_location(st, sp[L7->sp_offset_in_saved_window()]);
670 st->cr();
671
672 st->print("I0="); print_location(st, sp[I0->sp_offset_in_saved_window()]);
673 st->print("I1="); print_location(st, sp[I1->sp_offset_in_saved_window()]);
674 st->print("I2="); print_location(st, sp[I2->sp_offset_in_saved_window()]);
675 st->print("I3="); print_location(st, sp[I3->sp_offset_in_saved_window()]);
676 st->print("I4="); print_location(st, sp[I4->sp_offset_in_saved_window()]);
677 st->print("I5="); print_location(st, sp[I5->sp_offset_in_saved_window()]);
678 st->print("I6="); print_location(st, sp[I6->sp_offset_in_saved_window()]);
679 st->print("I7="); print_location(st, sp[I7->sp_offset_in_saved_window()]);
680 st->cr();
681 }
682
683 void os::Solaris::init_thread_fpu_state(void) {
684 // Nothing needed on Sparc.
685 }
686
687 #if !defined(COMPILER2) && !defined(_LP64)
688
689 // These routines are the initial value of atomic_xchg_entry(),
690 // atomic_cmpxchg_entry(), atomic_add_entry() and fence_entry()
691 // until initialization is complete.
692 // TODO - remove when the VM drops support for V8.
693
694 typedef jint xchg_func_t (jint, volatile jint*);
695 typedef jint cmpxchg_func_t (jint, volatile jint*, jint);
696 typedef jlong cmpxchg_long_func_t(jlong, volatile jlong*, jlong);
697 typedef jint add_func_t (jint, volatile jint*);
698
699 jint os::atomic_xchg_bootstrap(jint exchange_value, volatile jint* dest) {
700 // try to use the stub:
701 xchg_func_t* func = CAST_TO_FN_PTR(xchg_func_t*, StubRoutines::atomic_xchg_entry());
702
703 if (func != NULL) {
704 os::atomic_xchg_func = func;
705 return (*func)(exchange_value, dest);
706 }
707 assert(Threads::number_of_threads() == 0, "for bootstrap only");
708
709 jint old_value = *dest;
710 *dest = exchange_value;
711 return old_value;
712 }
713
714 jint os::atomic_cmpxchg_bootstrap(jint exchange_value, volatile jint* dest, jint compare_value) {
715 // try to use the stub:
716 cmpxchg_func_t* func = CAST_TO_FN_PTR(cmpxchg_func_t*, StubRoutines::atomic_cmpxchg_entry());
717
718 if (func != NULL) {
719 os::atomic_cmpxchg_func = func;
720 return (*func)(exchange_value, dest, compare_value);
721 }
722 assert(Threads::number_of_threads() == 0, "for bootstrap only");
723
724 jint old_value = *dest;
725 if (old_value == compare_value)
726 *dest = exchange_value;
727 return old_value;
728 }
729
730 jlong os::atomic_cmpxchg_long_bootstrap(jlong exchange_value, volatile jlong* dest, jlong compare_value) {
731 // try to use the stub:
732 cmpxchg_long_func_t* func = CAST_TO_FN_PTR(cmpxchg_long_func_t*, StubRoutines::atomic_cmpxchg_long_entry());
733
734 if (func != NULL) {
735 os::atomic_cmpxchg_long_func = func;
736 return (*func)(exchange_value, dest, compare_value);
737 }
738 assert(Threads::number_of_threads() == 0, "for bootstrap only");
739
740 jlong old_value = *dest;
741 if (old_value == compare_value)
742 *dest = exchange_value;
743 return old_value;
744 }
745
746 jint os::atomic_add_bootstrap(jint add_value, volatile jint* dest) {
747 // try to use the stub:
748 add_func_t* func = CAST_TO_FN_PTR(add_func_t*, StubRoutines::atomic_add_entry());
749
750 if (func != NULL) {
751 os::atomic_add_func = func;
752 return (*func)(add_value, dest);
753 }
754 assert(Threads::number_of_threads() == 0, "for bootstrap only");
755
756 return (*dest) += add_value;
757 }
758
759 xchg_func_t* os::atomic_xchg_func = os::atomic_xchg_bootstrap;
760 cmpxchg_func_t* os::atomic_cmpxchg_func = os::atomic_cmpxchg_bootstrap;
761 cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap;
762 add_func_t* os::atomic_add_func = os::atomic_add_bootstrap;
763
764 #endif // !_LP64 && !COMPILER2
765
766 #if defined(__sparc) && defined(COMPILER2) && defined(_GNU_SOURCE)
767 // See file build/solaris/makefiles/$compiler.make
768 // For compiler1 the architecture is v8 and frps isn't present in v8
769 extern "C" void _mark_fpu_nosave() {
770 __asm__ __volatile__ ("wr %%g0, 0, %%fprs \n\t" : : :);
771 }
772 #endif //defined(__sparc) && defined(COMPILER2)
773
774 #ifndef PRODUCT
775 void os::verify_stack_alignment() {
776 }
777 #endif
778
779 int os::extra_bang_size_in_bytes() {
780 // SPARC does not require an additional stack bang.
781 return 0;
782 }