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annotate src/os_cpu/solaris_sparc/vm/os_solaris_sparc.cpp @ 4859:9f1c2b7cdfb6
7135385: new hotspot build - hs23-b13
Reviewed-by: jcoomes
author | amurillo |
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date | Fri, 27 Jan 2012 14:49:54 -0800 |
parents | 1d1603768966 |
children | da4be62fb889 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 // no precompiled headers |
26 #include "assembler_sparc.inline.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/timer.hpp" | |
52 #include "thread_solaris.inline.hpp" | |
53 #include "utilities/events.hpp" | |
54 #include "utilities/vmError.hpp" | |
55 #ifdef COMPILER1 | |
56 #include "c1/c1_Runtime1.hpp" | |
57 #endif | |
58 #ifdef COMPILER2 | |
59 #include "opto/runtime.hpp" | |
60 #endif | |
61 | |
0 | 62 |
63 # include <signal.h> // needed first to avoid name collision for "std" with SC 5.0 | |
64 | |
65 // put OS-includes here | |
66 # include <sys/types.h> | |
67 # include <sys/mman.h> | |
68 # include <pthread.h> | |
69 # include <errno.h> | |
70 # include <dlfcn.h> | |
71 # include <stdio.h> | |
72 # include <unistd.h> | |
73 # include <sys/resource.h> | |
74 # include <thread.h> | |
75 # include <sys/stat.h> | |
76 # include <sys/time.h> | |
77 # include <sys/filio.h> | |
78 # include <sys/utsname.h> | |
79 # include <sys/systeminfo.h> | |
80 # include <sys/socket.h> | |
81 # include <sys/lwp.h> | |
82 # include <pwd.h> | |
83 # include <poll.h> | |
84 # include <sys/lwp.h> | |
85 | |
86 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later | |
87 # include <sys/procfs.h> // see comment in <sys/procfs.h> | |
88 | |
89 #define MAX_PATH (2 * K) | |
90 | |
91 // Minimum stack size for the VM. It's easier to document a constant | |
92 // but it's different for x86 and sparc because the page sizes are different. | |
93 #ifdef _LP64 | |
94 size_t os::Solaris::min_stack_allowed = 128*K; | |
95 #else | |
96 size_t os::Solaris::min_stack_allowed = 96*K; | |
97 #endif | |
98 | |
99 int os::Solaris::max_register_window_saves_before_flushing() { | |
100 // We should detect this at run time. For now, filling | |
101 // in with a constant. | |
102 return 8; | |
103 } | |
104 | |
105 static void handle_unflushed_register_windows(gwindows_t *win) { | |
106 int restore_count = win->wbcnt; | |
107 int i; | |
108 | |
109 for(i=0; i<restore_count; i++) { | |
110 address sp = ((address)win->spbuf[i]) + STACK_BIAS; | |
111 address reg_win = (address)&win->wbuf[i]; | |
112 memcpy(sp,reg_win,sizeof(struct rwindow)); | |
113 } | |
114 } | |
115 | |
116 char* os::non_memory_address_word() { | |
117 // Must never look like an address returned by reserve_memory, | |
118 // even in its subfields (as defined by the CPU immediate fields, | |
119 // if the CPU splits constants across multiple instructions). | |
120 // On SPARC, 0 != %hi(any real address), because there is no | |
121 // allocation in the first 1Kb of the virtual address space. | |
122 return (char*) 0; | |
123 } | |
124 | |
125 // Validate a ucontext retrieved from walking a uc_link of a ucontext. | |
126 // There are issues with libthread giving out uc_links for different threads | |
127 // on the same uc_link chain and bad or circular links. | |
128 // | |
129 bool os::Solaris::valid_ucontext(Thread* thread, ucontext_t* valid, ucontext_t* suspect) { | |
130 if (valid >= suspect || | |
131 valid->uc_stack.ss_flags != suspect->uc_stack.ss_flags || | |
132 valid->uc_stack.ss_sp != suspect->uc_stack.ss_sp || | |
133 valid->uc_stack.ss_size != suspect->uc_stack.ss_size) { | |
134 DEBUG_ONLY(tty->print_cr("valid_ucontext: failed test 1");) | |
135 return false; | |
136 } | |
137 | |
138 if (thread->is_Java_thread()) { | |
139 if (!valid_stack_address(thread, (address)suspect)) { | |
140 DEBUG_ONLY(tty->print_cr("valid_ucontext: uc_link not in thread stack");) | |
141 return false; | |
142 } | |
143 address _sp = (address)((intptr_t)suspect->uc_mcontext.gregs[REG_SP] + STACK_BIAS); | |
144 if (!valid_stack_address(thread, _sp) || | |
145 !frame::is_valid_stack_pointer(((JavaThread*)thread)->base_of_stack_pointer(), (intptr_t*)_sp)) { | |
146 DEBUG_ONLY(tty->print_cr("valid_ucontext: stackpointer not in thread stack");) | |
147 return false; | |
148 } | |
149 } | |
150 return true; | |
151 } | |
152 | |
153 // We will only follow one level of uc_link since there are libthread | |
154 // issues with ucontext linking and it is better to be safe and just | |
155 // let caller retry later. | |
156 ucontext_t* os::Solaris::get_valid_uc_in_signal_handler(Thread *thread, | |
157 ucontext_t *uc) { | |
158 | |
159 ucontext_t *retuc = NULL; | |
160 | |
161 // Sometimes the topmost register windows are not properly flushed. | |
162 // i.e., if the kernel would have needed to take a page fault | |
163 if (uc != NULL && uc->uc_mcontext.gwins != NULL) { | |
164 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); | |
165 } | |
166 | |
167 if (uc != NULL) { | |
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 // first ucontext is valid so try the next one | |
173 uc = uc->uc_link; | |
174 if (uc->uc_link == NULL) { | |
175 // cannot validate without uc_link so accept current ucontext | |
176 retuc = uc; | |
177 } else if (os::Solaris::valid_ucontext(thread, uc, uc->uc_link)) { | |
178 // the ucontext one level down is also valid so return it | |
179 retuc = uc; | |
180 } | |
181 } | |
182 } | |
183 return retuc; | |
184 } | |
185 | |
186 // Assumes ucontext is valid | |
187 ExtendedPC os::Solaris::ucontext_get_ExtendedPC(ucontext_t *uc) { | |
188 address pc = (address)uc->uc_mcontext.gregs[REG_PC]; | |
189 // set npc to zero to avoid using it for safepoint, good for profiling only | |
190 return ExtendedPC(pc); | |
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 // For Forte Analyzer AsyncGetCallTrace profiling support - thread | |
205 // is currently interrupted by SIGPROF. | |
206 // | |
207 // ret_fp parameter is only used by Solaris X86. | |
208 // | |
209 // The difference between this and os::fetch_frame_from_context() is that | |
210 // here we try to skip nested signal frames. | |
211 ExtendedPC os::Solaris::fetch_frame_from_ucontext(Thread* thread, | |
212 ucontext_t* uc, intptr_t** ret_sp, intptr_t** ret_fp) { | |
213 | |
214 assert(thread != NULL, "just checking"); | |
215 assert(ret_sp != NULL, "just checking"); | |
216 assert(ret_fp == NULL, "just checking"); | |
217 | |
218 ucontext_t *luc = os::Solaris::get_valid_uc_in_signal_handler(thread, uc); | |
219 | |
220 return os::fetch_frame_from_context(luc, ret_sp, ret_fp); | |
221 } | |
222 | |
223 | |
224 // ret_fp parameter is only used by Solaris X86. | |
225 ExtendedPC os::fetch_frame_from_context(void* ucVoid, | |
226 intptr_t** ret_sp, intptr_t** ret_fp) { | |
227 | |
228 ExtendedPC epc; | |
229 ucontext_t *uc = (ucontext_t*)ucVoid; | |
230 | |
231 if (uc != NULL) { | |
232 epc = os::Solaris::ucontext_get_ExtendedPC(uc); | |
233 if (ret_sp) *ret_sp = os::Solaris::ucontext_get_sp(uc); | |
234 } else { | |
235 // construct empty ExtendedPC for return value checking | |
236 epc = ExtendedPC(NULL); | |
237 if (ret_sp) *ret_sp = (intptr_t *)NULL; | |
238 } | |
239 | |
240 return epc; | |
241 } | |
242 | |
243 frame os::fetch_frame_from_context(void* ucVoid) { | |
244 intptr_t* sp; | |
245 intptr_t* fp; | |
246 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp); | |
247 return frame(sp, frame::unpatchable, epc.pc()); | |
248 } | |
249 | |
250 frame os::get_sender_for_C_frame(frame* fr) { | |
251 return frame(fr->sender_sp(), frame::unpatchable, fr->sender_pc()); | |
252 } | |
253 | |
254 frame os::current_frame() { | |
255 intptr_t* sp = StubRoutines::Sparc::flush_callers_register_windows_func()(); | |
256 frame myframe(sp, frame::unpatchable, | |
257 CAST_FROM_FN_PTR(address, os::current_frame)); | |
258 if (os::is_first_C_frame(&myframe)) { | |
259 // stack is not walkable | |
260 return frame(NULL, NULL, NULL); | |
261 } else { | |
262 return os::get_sender_for_C_frame(&myframe); | |
263 } | |
264 } | |
265 | |
266 | |
267 void GetThreadPC_Callback::execute(OSThread::InterruptArguments *args) { | |
268 Thread* thread = args->thread(); | |
269 ucontext_t* uc = args->ucontext(); | |
270 intptr_t* sp; | |
271 | |
272 assert(ProfileVM && thread->is_VM_thread(), "just checking"); | |
273 | |
274 // Skip the mcontext corruption verification. If if occasionally | |
275 // things get corrupt, it is ok for profiling - we will just get an unresolved | |
276 // function name | |
277 ExtendedPC new_addr((address)uc->uc_mcontext.gregs[REG_PC]); | |
278 _addr = new_addr; | |
279 } | |
280 | |
281 | |
282 static int threadgetstate(thread_t tid, int *flags, lwpid_t *lwp, stack_t *ss, gregset_t rs, lwpstatus_t *lwpstatus) { | |
283 char lwpstatusfile[PROCFILE_LENGTH]; | |
284 int lwpfd, err; | |
285 | |
286 if (err = os::Solaris::thr_getstate(tid, flags, lwp, ss, rs)) | |
287 return (err); | |
288 if (*flags == TRS_LWPID) { | |
289 sprintf(lwpstatusfile, "/proc/%d/lwp/%d/lwpstatus", getpid(), | |
290 *lwp); | |
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291 if ((lwpfd = ::open(lwpstatusfile, O_RDONLY)) < 0) { |
0 | 292 perror("thr_mutator_status: open lwpstatus"); |
293 return (EINVAL); | |
294 } | |
295 if (pread(lwpfd, lwpstatus, sizeof (lwpstatus_t), (off_t)0) != | |
296 sizeof (lwpstatus_t)) { | |
297 perror("thr_mutator_status: read lwpstatus"); | |
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298 (void) ::close(lwpfd); |
0 | 299 return (EINVAL); |
300 } | |
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301 (void) ::close(lwpfd); |
0 | 302 } |
303 return (0); | |
304 } | |
305 | |
306 | |
307 bool os::is_allocatable(size_t bytes) { | |
308 #ifdef _LP64 | |
309 return true; | |
310 #else | |
311 return (bytes <= (size_t)3835*M); | |
312 #endif | |
313 } | |
314 | |
315 extern "C" void Fetch32PFI () ; | |
316 extern "C" void Fetch32Resume () ; | |
317 extern "C" void FetchNPFI () ; | |
318 extern "C" void FetchNResume () ; | |
319 | |
2191 | 320 extern "C" JNIEXPORT int |
321 JVM_handle_solaris_signal(int sig, siginfo_t* info, void* ucVoid, | |
322 int abort_if_unrecognized) { | |
0 | 323 ucontext_t* uc = (ucontext_t*) ucVoid; |
324 | |
325 Thread* t = ThreadLocalStorage::get_thread_slow(); | |
326 | |
327 SignalHandlerMark shm(t); | |
328 | |
329 if(sig == SIGPIPE || sig == SIGXFSZ) { | |
330 if (os::Solaris::chained_handler(sig, info, ucVoid)) { | |
331 return true; | |
332 } else { | |
333 if (PrintMiscellaneous && (WizardMode || Verbose)) { | |
334 char buf[64]; | |
335 warning("Ignoring %s - see 4229104 or 6499219", | |
336 os::exception_name(sig, buf, sizeof(buf))); | |
337 | |
338 } | |
339 return true; | |
340 } | |
341 } | |
342 | |
343 JavaThread* thread = NULL; | |
344 VMThread* vmthread = NULL; | |
345 if (os::Solaris::signal_handlers_are_installed) { | |
346 if (t != NULL ){ | |
347 if(t->is_Java_thread()) { | |
348 thread = (JavaThread*)t; | |
349 } | |
350 else if(t->is_VM_thread()){ | |
351 vmthread = (VMThread *)t; | |
352 } | |
353 } | |
354 } | |
355 | |
356 guarantee(sig != os::Solaris::SIGinterrupt(), "Can not chain VM interrupt signal, try -XX:+UseAltSigs"); | |
357 | |
358 if (sig == os::Solaris::SIGasync()) { | |
359 if (thread) { | |
360 OSThread::InterruptArguments args(thread, uc); | |
361 thread->osthread()->do_interrupt_callbacks_at_interrupt(&args); | |
362 return true; | |
363 } else if (vmthread) { | |
364 OSThread::InterruptArguments args(vmthread, uc); | |
365 vmthread->osthread()->do_interrupt_callbacks_at_interrupt(&args); | |
366 return true; | |
367 } else if (os::Solaris::chained_handler(sig, info, ucVoid)) { | |
368 return true; | |
369 } else { | |
370 // If os::Solaris::SIGasync not chained, and this is a non-vm and | |
371 // non-java thread | |
372 return true; | |
373 } | |
374 } | |
375 | |
376 if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) { | |
377 // can't decode this kind of signal | |
378 info = NULL; | |
379 } else { | |
380 assert(sig == info->si_signo, "bad siginfo"); | |
381 } | |
382 | |
383 // decide if this trap can be handled by a stub | |
384 address stub = NULL; | |
385 | |
386 address pc = NULL; | |
387 address npc = NULL; | |
388 | |
389 //%note os_trap_1 | |
390 if (info != NULL && uc != NULL && thread != NULL) { | |
391 // factor me: getPCfromContext | |
392 pc = (address) uc->uc_mcontext.gregs[REG_PC]; | |
393 npc = (address) uc->uc_mcontext.gregs[REG_nPC]; | |
394 | |
395 // SafeFetch() support | |
396 // Implemented with either a fixed set of addresses such | |
397 // as Fetch32*, or with Thread._OnTrap. | |
398 if (uc->uc_mcontext.gregs[REG_PC] == intptr_t(Fetch32PFI)) { | |
399 uc->uc_mcontext.gregs [REG_PC] = intptr_t(Fetch32Resume) ; | |
400 uc->uc_mcontext.gregs [REG_nPC] = intptr_t(Fetch32Resume) + 4 ; | |
401 return true ; | |
402 } | |
403 if (uc->uc_mcontext.gregs[REG_PC] == intptr_t(FetchNPFI)) { | |
404 uc->uc_mcontext.gregs [REG_PC] = intptr_t(FetchNResume) ; | |
405 uc->uc_mcontext.gregs [REG_nPC] = intptr_t(FetchNResume) + 4 ; | |
406 return true ; | |
407 } | |
408 | |
409 // Handle ALL stack overflow variations here | |
410 if (sig == SIGSEGV && info->si_code == SEGV_ACCERR) { | |
411 address addr = (address) info->si_addr; | |
412 if (thread->in_stack_yellow_zone(addr)) { | |
413 thread->disable_stack_yellow_zone(); | |
414 // Sometimes the register windows are not properly flushed. | |
415 if(uc->uc_mcontext.gwins != NULL) { | |
416 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); | |
417 } | |
418 if (thread->thread_state() == _thread_in_Java) { | |
419 // Throw a stack overflow exception. Guard pages will be reenabled | |
420 // while unwinding the stack. | |
421 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW); | |
422 } else { | |
423 // Thread was in the vm or native code. Return and try to finish. | |
424 return true; | |
425 } | |
426 } else if (thread->in_stack_red_zone(addr)) { | |
427 // Fatal red zone violation. Disable the guard pages and fall through | |
428 // to handle_unexpected_exception way down below. | |
429 thread->disable_stack_red_zone(); | |
430 tty->print_raw_cr("An irrecoverable stack overflow has occurred."); | |
431 // Sometimes the register windows are not properly flushed. | |
432 if(uc->uc_mcontext.gwins != NULL) { | |
433 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); | |
434 } | |
435 } | |
436 } | |
437 | |
438 | |
439 if (thread->thread_state() == _thread_in_vm) { | |
440 if (sig == SIGBUS && info->si_code == BUS_OBJERR && thread->doing_unsafe_access()) { | |
441 stub = StubRoutines::handler_for_unsafe_access(); | |
442 } | |
443 } | |
444 | |
445 else if (thread->thread_state() == _thread_in_Java) { | |
446 // Java thread running in Java code => find exception handler if any | |
447 // a fault inside compiled code, the interpreter, or a stub | |
448 | |
449 // Support Safepoint Polling | |
450 if ( sig == SIGSEGV && (address)info->si_addr == os::get_polling_page() ) { | |
451 stub = SharedRuntime::get_poll_stub(pc); | |
452 } | |
453 | |
454 // Not needed on x86 solaris because verify_oops doesn't generate | |
455 // SEGV/BUS like sparc does. | |
456 if ( (sig == SIGSEGV || sig == SIGBUS) | |
457 && pc >= MacroAssembler::_verify_oop_implicit_branch[0] | |
458 && pc < MacroAssembler::_verify_oop_implicit_branch[1] ) { | |
459 stub = MacroAssembler::_verify_oop_implicit_branch[2]; | |
460 warning("fixed up memory fault in +VerifyOops at address " INTPTR_FORMAT, info->si_addr); | |
461 } | |
462 | |
463 // This is not factored because on x86 solaris the patching for | |
464 // zombies does not generate a SEGV. | |
465 else if (sig == SIGSEGV && nativeInstruction_at(pc)->is_zombie()) { | |
466 // zombie method (ld [%g0],%o7 instruction) | |
467 stub = SharedRuntime::get_handle_wrong_method_stub(); | |
468 | |
469 // At the stub it needs to look like a call from the caller of this | |
470 // method (not a call from the segv site). | |
471 pc = (address)uc->uc_mcontext.gregs[REG_O7]; | |
472 } | |
473 else if (sig == SIGBUS && info->si_code == BUS_OBJERR) { | |
474 // BugId 4454115: A read from a MappedByteBuffer can fault | |
475 // here if the underlying file has been truncated. | |
476 // Do not crash the VM in such a case. | |
477 CodeBlob* cb = CodeCache::find_blob_unsafe(pc); | |
478 nmethod* nm = cb->is_nmethod() ? (nmethod*)cb : NULL; | |
479 if (nm != NULL && nm->has_unsafe_access()) { | |
480 stub = StubRoutines::handler_for_unsafe_access(); | |
481 } | |
482 } | |
483 | |
484 else if (sig == SIGFPE && info->si_code == FPE_INTDIV) { | |
485 // integer divide by zero | |
486 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); | |
487 } | |
488 else if (sig == SIGFPE && info->si_code == FPE_FLTDIV) { | |
489 // floating-point divide by zero | |
490 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); | |
491 } | |
492 #ifdef COMPILER2 | |
493 else if (sig == SIGILL && nativeInstruction_at(pc)->is_ic_miss_trap()) { | |
494 #ifdef ASSERT | |
495 #ifdef TIERED | |
496 CodeBlob* cb = CodeCache::find_blob_unsafe(pc); | |
497 assert(cb->is_compiled_by_c2(), "Wrong compiler"); | |
498 #endif // TIERED | |
499 #endif // ASSERT | |
500 // Inline cache missed and user trap "Tne G0+ST_RESERVED_FOR_USER_0+2" taken. | |
501 stub = SharedRuntime::get_ic_miss_stub(); | |
502 // At the stub it needs to look like a call from the caller of this | |
503 // method (not a call from the segv site). | |
504 pc = (address)uc->uc_mcontext.gregs[REG_O7]; | |
505 } | |
506 #endif // COMPILER2 | |
507 | |
508 else if (sig == SIGSEGV && info->si_code > 0 && !MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) { | |
509 // Determination of interpreter/vtable stub/compiled code null exception | |
510 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); | |
511 } | |
512 } | |
513 | |
514 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in | |
515 // and the heap gets shrunk before the field access. | |
516 if ((sig == SIGSEGV) || (sig == SIGBUS)) { | |
517 address addr = JNI_FastGetField::find_slowcase_pc(pc); | |
518 if (addr != (address)-1) { | |
519 stub = addr; | |
520 } | |
521 } | |
522 | |
523 // Check to see if we caught the safepoint code in the | |
524 // process of write protecting the memory serialization page. | |
525 // It write enables the page immediately after protecting it | |
526 // so just return. | |
527 if ((sig == SIGSEGV) && | |
528 os::is_memory_serialize_page(thread, (address)info->si_addr)) { | |
529 // Block current thread until the memory serialize page permission restored. | |
530 os::block_on_serialize_page_trap(); | |
531 return true; | |
532 } | |
533 } | |
534 | |
535 if (stub != NULL) { | |
536 // save all thread context in case we need to restore it | |
537 | |
538 thread->set_saved_exception_pc(pc); | |
539 thread->set_saved_exception_npc(npc); | |
540 | |
541 // simulate a branch to the stub (a "call" in the safepoint stub case) | |
542 // factor me: setPC | |
543 uc->uc_mcontext.gregs[REG_PC ] = (greg_t)stub; | |
544 uc->uc_mcontext.gregs[REG_nPC] = (greg_t)(stub + 4); | |
545 | |
546 #ifndef PRODUCT | |
547 if (TraceJumps) thread->record_jump(stub, NULL, __FILE__, __LINE__); | |
548 #endif /* PRODUCT */ | |
549 | |
550 return true; | |
551 } | |
552 | |
553 // signal-chaining | |
554 if (os::Solaris::chained_handler(sig, info, ucVoid)) { | |
555 return true; | |
556 } | |
557 | |
558 if (!abort_if_unrecognized) { | |
559 // caller wants another chance, so give it to him | |
560 return false; | |
561 } | |
562 | |
563 if (!os::Solaris::libjsig_is_loaded) { | |
564 struct sigaction oldAct; | |
565 sigaction(sig, (struct sigaction *)0, &oldAct); | |
566 if (oldAct.sa_sigaction != signalHandler) { | |
567 void* sighand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) | |
568 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); | |
605 | 569 warning("Unexpected Signal %d occurred under user-defined signal handler " INTPTR_FORMAT, sig, (intptr_t)sighand); |
0 | 570 } |
571 } | |
572 | |
573 if (pc == NULL && uc != NULL) { | |
574 pc = (address) uc->uc_mcontext.gregs[REG_PC]; | |
575 } | |
576 | |
1907 | 577 // Sometimes the register windows are not properly flushed. |
578 if(uc->uc_mcontext.gwins != NULL) { | |
579 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); | |
580 } | |
581 | |
0 | 582 // unmask current signal |
583 sigset_t newset; | |
584 sigemptyset(&newset); | |
585 sigaddset(&newset, sig); | |
586 sigprocmask(SIG_UNBLOCK, &newset, NULL); | |
587 | |
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588 // Determine which sort of error to throw. Out of swap may signal |
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589 // on the thread stack, which could get a mapping error when touched. |
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590 address addr = (address) info->si_addr; |
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591 if (sig == SIGBUS && info->si_code == BUS_OBJERR && info->si_errno == ENOMEM) { |
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592 vm_exit_out_of_memory(0, "Out of swap space to map in thread stack."); |
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593 } |
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594 |
0 | 595 VMError err(t, sig, pc, info, ucVoid); |
596 err.report_and_die(); | |
597 | |
598 ShouldNotReachHere(); | |
599 } | |
600 | |
601 void os::print_context(outputStream *st, void *context) { | |
602 if (context == NULL) return; | |
603 | |
604 ucontext_t *uc = (ucontext_t*)context; | |
605 st->print_cr("Registers:"); | |
606 | |
1907 | 607 st->print_cr(" G1=" INTPTR_FORMAT " G2=" INTPTR_FORMAT |
608 " G3=" INTPTR_FORMAT " G4=" INTPTR_FORMAT, | |
609 uc->uc_mcontext.gregs[REG_G1], | |
610 uc->uc_mcontext.gregs[REG_G2], | |
611 uc->uc_mcontext.gregs[REG_G3], | |
612 uc->uc_mcontext.gregs[REG_G4]); | |
613 st->print_cr(" G5=" INTPTR_FORMAT " G6=" INTPTR_FORMAT | |
614 " G7=" INTPTR_FORMAT " Y=" INTPTR_FORMAT, | |
615 uc->uc_mcontext.gregs[REG_G5], | |
616 uc->uc_mcontext.gregs[REG_G6], | |
617 uc->uc_mcontext.gregs[REG_G7], | |
618 uc->uc_mcontext.gregs[REG_Y]); | |
0 | 619 st->print_cr(" O0=" INTPTR_FORMAT " O1=" INTPTR_FORMAT |
620 " O2=" INTPTR_FORMAT " O3=" INTPTR_FORMAT, | |
621 uc->uc_mcontext.gregs[REG_O0], | |
622 uc->uc_mcontext.gregs[REG_O1], | |
623 uc->uc_mcontext.gregs[REG_O2], | |
624 uc->uc_mcontext.gregs[REG_O3]); | |
625 st->print_cr(" O4=" INTPTR_FORMAT " O5=" INTPTR_FORMAT | |
626 " O6=" INTPTR_FORMAT " O7=" INTPTR_FORMAT, | |
627 uc->uc_mcontext.gregs[REG_O4], | |
628 uc->uc_mcontext.gregs[REG_O5], | |
629 uc->uc_mcontext.gregs[REG_O6], | |
630 uc->uc_mcontext.gregs[REG_O7]); | |
631 | |
1907 | 632 |
633 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc); | |
634 st->print_cr(" L0=" INTPTR_FORMAT " L1=" INTPTR_FORMAT | |
635 " L2=" INTPTR_FORMAT " L3=" INTPTR_FORMAT, | |
636 sp[L0->sp_offset_in_saved_window()], | |
637 sp[L1->sp_offset_in_saved_window()], | |
638 sp[L2->sp_offset_in_saved_window()], | |
639 sp[L3->sp_offset_in_saved_window()]); | |
640 st->print_cr(" L4=" INTPTR_FORMAT " L5=" INTPTR_FORMAT | |
641 " L6=" INTPTR_FORMAT " L7=" INTPTR_FORMAT, | |
642 sp[L4->sp_offset_in_saved_window()], | |
643 sp[L5->sp_offset_in_saved_window()], | |
644 sp[L6->sp_offset_in_saved_window()], | |
645 sp[L7->sp_offset_in_saved_window()]); | |
646 st->print_cr(" I0=" INTPTR_FORMAT " I1=" INTPTR_FORMAT | |
647 " I2=" INTPTR_FORMAT " I3=" INTPTR_FORMAT, | |
648 sp[I0->sp_offset_in_saved_window()], | |
649 sp[I1->sp_offset_in_saved_window()], | |
650 sp[I2->sp_offset_in_saved_window()], | |
651 sp[I3->sp_offset_in_saved_window()]); | |
652 st->print_cr(" I4=" INTPTR_FORMAT " I5=" INTPTR_FORMAT | |
653 " I6=" INTPTR_FORMAT " I7=" INTPTR_FORMAT, | |
654 sp[I4->sp_offset_in_saved_window()], | |
655 sp[I5->sp_offset_in_saved_window()], | |
656 sp[I6->sp_offset_in_saved_window()], | |
657 sp[I7->sp_offset_in_saved_window()]); | |
0 | 658 |
659 st->print_cr(" PC=" INTPTR_FORMAT " nPC=" INTPTR_FORMAT, | |
660 uc->uc_mcontext.gregs[REG_PC], | |
661 uc->uc_mcontext.gregs[REG_nPC]); | |
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662 st->cr(); |
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663 st->cr(); |
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664 |
0 | 665 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp); |
666 print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t)); | |
667 st->cr(); | |
668 | |
669 // Note: it may be unsafe to inspect memory near pc. For example, pc may | |
670 // point to garbage if entry point in an nmethod is corrupted. Leave | |
671 // this at the end, and hope for the best. | |
672 ExtendedPC epc = os::Solaris::ucontext_get_ExtendedPC(uc); | |
673 address pc = epc.pc(); | |
674 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc); | |
1907 | 675 print_hex_dump(st, pc - 32, pc + 32, sizeof(char)); |
676 } | |
677 | |
678 void os::print_register_info(outputStream *st, void *context) { | |
679 if (context == NULL) return; | |
680 | |
681 ucontext_t *uc = (ucontext_t*)context; | |
682 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc); | |
683 | |
684 st->print_cr("Register to memory mapping:"); | |
685 st->cr(); | |
686 | |
687 // this is only for the "general purpose" registers | |
688 st->print("G1="); print_location(st, uc->uc_mcontext.gregs[REG_G1]); | |
689 st->print("G2="); print_location(st, uc->uc_mcontext.gregs[REG_G2]); | |
690 st->print("G3="); print_location(st, uc->uc_mcontext.gregs[REG_G3]); | |
691 st->print("G4="); print_location(st, uc->uc_mcontext.gregs[REG_G4]); | |
692 st->print("G5="); print_location(st, uc->uc_mcontext.gregs[REG_G5]); | |
693 st->print("G6="); print_location(st, uc->uc_mcontext.gregs[REG_G6]); | |
694 st->print("G7="); print_location(st, uc->uc_mcontext.gregs[REG_G7]); | |
695 st->cr(); | |
696 | |
697 st->print("O0="); print_location(st, uc->uc_mcontext.gregs[REG_O0]); | |
698 st->print("O1="); print_location(st, uc->uc_mcontext.gregs[REG_O1]); | |
699 st->print("O2="); print_location(st, uc->uc_mcontext.gregs[REG_O2]); | |
700 st->print("O3="); print_location(st, uc->uc_mcontext.gregs[REG_O3]); | |
701 st->print("O4="); print_location(st, uc->uc_mcontext.gregs[REG_O4]); | |
702 st->print("O5="); print_location(st, uc->uc_mcontext.gregs[REG_O5]); | |
703 st->print("O6="); print_location(st, uc->uc_mcontext.gregs[REG_O6]); | |
704 st->print("O7="); print_location(st, uc->uc_mcontext.gregs[REG_O7]); | |
705 st->cr(); | |
706 | |
707 st->print("L0="); print_location(st, sp[L0->sp_offset_in_saved_window()]); | |
708 st->print("L1="); print_location(st, sp[L1->sp_offset_in_saved_window()]); | |
709 st->print("L2="); print_location(st, sp[L2->sp_offset_in_saved_window()]); | |
710 st->print("L3="); print_location(st, sp[L3->sp_offset_in_saved_window()]); | |
711 st->print("L4="); print_location(st, sp[L4->sp_offset_in_saved_window()]); | |
712 st->print("L5="); print_location(st, sp[L5->sp_offset_in_saved_window()]); | |
713 st->print("L6="); print_location(st, sp[L6->sp_offset_in_saved_window()]); | |
714 st->print("L7="); print_location(st, sp[L7->sp_offset_in_saved_window()]); | |
715 st->cr(); | |
716 | |
717 st->print("I0="); print_location(st, sp[I0->sp_offset_in_saved_window()]); | |
718 st->print("I1="); print_location(st, sp[I1->sp_offset_in_saved_window()]); | |
719 st->print("I2="); print_location(st, sp[I2->sp_offset_in_saved_window()]); | |
720 st->print("I3="); print_location(st, sp[I3->sp_offset_in_saved_window()]); | |
721 st->print("I4="); print_location(st, sp[I4->sp_offset_in_saved_window()]); | |
722 st->print("I5="); print_location(st, sp[I5->sp_offset_in_saved_window()]); | |
723 st->print("I6="); print_location(st, sp[I6->sp_offset_in_saved_window()]); | |
724 st->print("I7="); print_location(st, sp[I7->sp_offset_in_saved_window()]); | |
725 st->cr(); | |
0 | 726 } |
727 | |
728 void os::Solaris::init_thread_fpu_state(void) { | |
729 // Nothing needed on Sparc. | |
730 } | |
731 | |
732 #if !defined(COMPILER2) && !defined(_LP64) | |
733 | |
734 // These routines are the initial value of atomic_xchg_entry(), | |
735 // atomic_cmpxchg_entry(), atomic_add_entry() and fence_entry() | |
736 // until initialization is complete. | |
737 // TODO - remove when the VM drops support for V8. | |
738 | |
739 typedef jint xchg_func_t (jint, volatile jint*); | |
740 typedef jint cmpxchg_func_t (jint, volatile jint*, jint); | |
741 typedef jlong cmpxchg_long_func_t(jlong, volatile jlong*, jlong); | |
742 typedef jint add_func_t (jint, volatile jint*); | |
743 | |
744 jint os::atomic_xchg_bootstrap(jint exchange_value, volatile jint* dest) { | |
745 // try to use the stub: | |
746 xchg_func_t* func = CAST_TO_FN_PTR(xchg_func_t*, StubRoutines::atomic_xchg_entry()); | |
747 | |
748 if (func != NULL) { | |
749 os::atomic_xchg_func = func; | |
750 return (*func)(exchange_value, dest); | |
751 } | |
752 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
753 | |
754 jint old_value = *dest; | |
755 *dest = exchange_value; | |
756 return old_value; | |
757 } | |
758 | |
759 jint os::atomic_cmpxchg_bootstrap(jint exchange_value, volatile jint* dest, jint compare_value) { | |
760 // try to use the stub: | |
761 cmpxchg_func_t* func = CAST_TO_FN_PTR(cmpxchg_func_t*, StubRoutines::atomic_cmpxchg_entry()); | |
762 | |
763 if (func != NULL) { | |
764 os::atomic_cmpxchg_func = func; | |
765 return (*func)(exchange_value, dest, compare_value); | |
766 } | |
767 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
768 | |
769 jint old_value = *dest; | |
770 if (old_value == compare_value) | |
771 *dest = exchange_value; | |
772 return old_value; | |
773 } | |
774 | |
775 jlong os::atomic_cmpxchg_long_bootstrap(jlong exchange_value, volatile jlong* dest, jlong compare_value) { | |
776 // try to use the stub: | |
777 cmpxchg_long_func_t* func = CAST_TO_FN_PTR(cmpxchg_long_func_t*, StubRoutines::atomic_cmpxchg_long_entry()); | |
778 | |
779 if (func != NULL) { | |
780 os::atomic_cmpxchg_long_func = func; | |
781 return (*func)(exchange_value, dest, compare_value); | |
782 } | |
783 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
784 | |
785 jlong old_value = *dest; | |
786 if (old_value == compare_value) | |
787 *dest = exchange_value; | |
788 return old_value; | |
789 } | |
790 | |
791 jint os::atomic_add_bootstrap(jint add_value, volatile jint* dest) { | |
792 // try to use the stub: | |
793 add_func_t* func = CAST_TO_FN_PTR(add_func_t*, StubRoutines::atomic_add_entry()); | |
794 | |
795 if (func != NULL) { | |
796 os::atomic_add_func = func; | |
797 return (*func)(add_value, dest); | |
798 } | |
799 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
800 | |
801 return (*dest) += add_value; | |
802 } | |
803 | |
804 xchg_func_t* os::atomic_xchg_func = os::atomic_xchg_bootstrap; | |
805 cmpxchg_func_t* os::atomic_cmpxchg_func = os::atomic_cmpxchg_bootstrap; | |
806 cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap; | |
807 add_func_t* os::atomic_add_func = os::atomic_add_bootstrap; | |
808 | |
809 #endif // !_LP64 && !COMPILER2 | |
810 | |
811 #if defined(__sparc) && defined(COMPILER2) && defined(_GNU_SOURCE) | |
812 // See file build/solaris/makefiles/$compiler.make | |
813 // For compiler1 the architecture is v8 and frps isn't present in v8 | |
814 extern "C" void _mark_fpu_nosave() { | |
815 __asm__ __volatile__ ("wr %%g0, 0, %%fprs \n\t" : : :); | |
816 } | |
817 #endif //defined(__sparc) && defined(COMPILER2) |