Mercurial > hg > truffle
annotate src/os_cpu/solaris_sparc/vm/os_solaris_sparc.cpp @ 6906:521c82b9cbf8
7198606: Improve VM optimization
Summary: Remove incorrect code in OptimizeFill optimization.
Reviewed-by: roland, twisti
author | kvn |
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date | Wed, 19 Sep 2012 13:58:31 -0700 |
parents | da4be62fb889 |
children | bf2edd3c9b0f |
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 | |
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254 // Returns an estimate of the current stack pointer. Result must be guaranteed to |
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255 // point into the calling threads stack, and be no lower than the current stack |
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256 // pointer. |
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257 address os::current_stack_pointer() { |
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258 volatile int dummy; |
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259 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right |
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260 return sp; |
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261 } |
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262 |
0 | 263 frame os::current_frame() { |
264 intptr_t* sp = StubRoutines::Sparc::flush_callers_register_windows_func()(); | |
265 frame myframe(sp, frame::unpatchable, | |
266 CAST_FROM_FN_PTR(address, os::current_frame)); | |
267 if (os::is_first_C_frame(&myframe)) { | |
268 // stack is not walkable | |
269 return frame(NULL, NULL, NULL); | |
270 } else { | |
271 return os::get_sender_for_C_frame(&myframe); | |
272 } | |
273 } | |
274 | |
275 | |
276 void GetThreadPC_Callback::execute(OSThread::InterruptArguments *args) { | |
277 Thread* thread = args->thread(); | |
278 ucontext_t* uc = args->ucontext(); | |
279 intptr_t* sp; | |
280 | |
281 assert(ProfileVM && thread->is_VM_thread(), "just checking"); | |
282 | |
283 // Skip the mcontext corruption verification. If if occasionally | |
284 // things get corrupt, it is ok for profiling - we will just get an unresolved | |
285 // function name | |
286 ExtendedPC new_addr((address)uc->uc_mcontext.gregs[REG_PC]); | |
287 _addr = new_addr; | |
288 } | |
289 | |
290 | |
291 static int threadgetstate(thread_t tid, int *flags, lwpid_t *lwp, stack_t *ss, gregset_t rs, lwpstatus_t *lwpstatus) { | |
292 char lwpstatusfile[PROCFILE_LENGTH]; | |
293 int lwpfd, err; | |
294 | |
295 if (err = os::Solaris::thr_getstate(tid, flags, lwp, ss, rs)) | |
296 return (err); | |
297 if (*flags == TRS_LWPID) { | |
298 sprintf(lwpstatusfile, "/proc/%d/lwp/%d/lwpstatus", getpid(), | |
299 *lwp); | |
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300 if ((lwpfd = ::open(lwpstatusfile, O_RDONLY)) < 0) { |
0 | 301 perror("thr_mutator_status: open lwpstatus"); |
302 return (EINVAL); | |
303 } | |
304 if (pread(lwpfd, lwpstatus, sizeof (lwpstatus_t), (off_t)0) != | |
305 sizeof (lwpstatus_t)) { | |
306 perror("thr_mutator_status: read lwpstatus"); | |
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307 (void) ::close(lwpfd); |
0 | 308 return (EINVAL); |
309 } | |
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310 (void) ::close(lwpfd); |
0 | 311 } |
312 return (0); | |
313 } | |
314 | |
315 | |
316 bool os::is_allocatable(size_t bytes) { | |
317 #ifdef _LP64 | |
318 return true; | |
319 #else | |
320 return (bytes <= (size_t)3835*M); | |
321 #endif | |
322 } | |
323 | |
324 extern "C" void Fetch32PFI () ; | |
325 extern "C" void Fetch32Resume () ; | |
326 extern "C" void FetchNPFI () ; | |
327 extern "C" void FetchNResume () ; | |
328 | |
2191 | 329 extern "C" JNIEXPORT int |
330 JVM_handle_solaris_signal(int sig, siginfo_t* info, void* ucVoid, | |
331 int abort_if_unrecognized) { | |
0 | 332 ucontext_t* uc = (ucontext_t*) ucVoid; |
333 | |
334 Thread* t = ThreadLocalStorage::get_thread_slow(); | |
335 | |
336 SignalHandlerMark shm(t); | |
337 | |
338 if(sig == SIGPIPE || sig == SIGXFSZ) { | |
339 if (os::Solaris::chained_handler(sig, info, ucVoid)) { | |
340 return true; | |
341 } else { | |
342 if (PrintMiscellaneous && (WizardMode || Verbose)) { | |
343 char buf[64]; | |
344 warning("Ignoring %s - see 4229104 or 6499219", | |
345 os::exception_name(sig, buf, sizeof(buf))); | |
346 | |
347 } | |
348 return true; | |
349 } | |
350 } | |
351 | |
352 JavaThread* thread = NULL; | |
353 VMThread* vmthread = NULL; | |
354 if (os::Solaris::signal_handlers_are_installed) { | |
355 if (t != NULL ){ | |
356 if(t->is_Java_thread()) { | |
357 thread = (JavaThread*)t; | |
358 } | |
359 else if(t->is_VM_thread()){ | |
360 vmthread = (VMThread *)t; | |
361 } | |
362 } | |
363 } | |
364 | |
365 guarantee(sig != os::Solaris::SIGinterrupt(), "Can not chain VM interrupt signal, try -XX:+UseAltSigs"); | |
366 | |
367 if (sig == os::Solaris::SIGasync()) { | |
368 if (thread) { | |
369 OSThread::InterruptArguments args(thread, uc); | |
370 thread->osthread()->do_interrupt_callbacks_at_interrupt(&args); | |
371 return true; | |
372 } else if (vmthread) { | |
373 OSThread::InterruptArguments args(vmthread, uc); | |
374 vmthread->osthread()->do_interrupt_callbacks_at_interrupt(&args); | |
375 return true; | |
376 } else if (os::Solaris::chained_handler(sig, info, ucVoid)) { | |
377 return true; | |
378 } else { | |
379 // If os::Solaris::SIGasync not chained, and this is a non-vm and | |
380 // non-java thread | |
381 return true; | |
382 } | |
383 } | |
384 | |
385 if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) { | |
386 // can't decode this kind of signal | |
387 info = NULL; | |
388 } else { | |
389 assert(sig == info->si_signo, "bad siginfo"); | |
390 } | |
391 | |
392 // decide if this trap can be handled by a stub | |
393 address stub = NULL; | |
394 | |
395 address pc = NULL; | |
396 address npc = NULL; | |
397 | |
398 //%note os_trap_1 | |
399 if (info != NULL && uc != NULL && thread != NULL) { | |
400 // factor me: getPCfromContext | |
401 pc = (address) uc->uc_mcontext.gregs[REG_PC]; | |
402 npc = (address) uc->uc_mcontext.gregs[REG_nPC]; | |
403 | |
404 // SafeFetch() support | |
405 // Implemented with either a fixed set of addresses such | |
406 // as Fetch32*, or with Thread._OnTrap. | |
407 if (uc->uc_mcontext.gregs[REG_PC] == intptr_t(Fetch32PFI)) { | |
408 uc->uc_mcontext.gregs [REG_PC] = intptr_t(Fetch32Resume) ; | |
409 uc->uc_mcontext.gregs [REG_nPC] = intptr_t(Fetch32Resume) + 4 ; | |
410 return true ; | |
411 } | |
412 if (uc->uc_mcontext.gregs[REG_PC] == intptr_t(FetchNPFI)) { | |
413 uc->uc_mcontext.gregs [REG_PC] = intptr_t(FetchNResume) ; | |
414 uc->uc_mcontext.gregs [REG_nPC] = intptr_t(FetchNResume) + 4 ; | |
415 return true ; | |
416 } | |
417 | |
418 // Handle ALL stack overflow variations here | |
419 if (sig == SIGSEGV && info->si_code == SEGV_ACCERR) { | |
420 address addr = (address) info->si_addr; | |
421 if (thread->in_stack_yellow_zone(addr)) { | |
422 thread->disable_stack_yellow_zone(); | |
423 // Sometimes the register windows are not properly flushed. | |
424 if(uc->uc_mcontext.gwins != NULL) { | |
425 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); | |
426 } | |
427 if (thread->thread_state() == _thread_in_Java) { | |
428 // Throw a stack overflow exception. Guard pages will be reenabled | |
429 // while unwinding the stack. | |
430 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW); | |
431 } else { | |
432 // Thread was in the vm or native code. Return and try to finish. | |
433 return true; | |
434 } | |
435 } else if (thread->in_stack_red_zone(addr)) { | |
436 // Fatal red zone violation. Disable the guard pages and fall through | |
437 // to handle_unexpected_exception way down below. | |
438 thread->disable_stack_red_zone(); | |
439 tty->print_raw_cr("An irrecoverable stack overflow has occurred."); | |
440 // Sometimes the register windows are not properly flushed. | |
441 if(uc->uc_mcontext.gwins != NULL) { | |
442 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); | |
443 } | |
444 } | |
445 } | |
446 | |
447 | |
448 if (thread->thread_state() == _thread_in_vm) { | |
449 if (sig == SIGBUS && info->si_code == BUS_OBJERR && thread->doing_unsafe_access()) { | |
450 stub = StubRoutines::handler_for_unsafe_access(); | |
451 } | |
452 } | |
453 | |
454 else if (thread->thread_state() == _thread_in_Java) { | |
455 // Java thread running in Java code => find exception handler if any | |
456 // a fault inside compiled code, the interpreter, or a stub | |
457 | |
458 // Support Safepoint Polling | |
459 if ( sig == SIGSEGV && (address)info->si_addr == os::get_polling_page() ) { | |
460 stub = SharedRuntime::get_poll_stub(pc); | |
461 } | |
462 | |
463 // Not needed on x86 solaris because verify_oops doesn't generate | |
464 // SEGV/BUS like sparc does. | |
465 if ( (sig == SIGSEGV || sig == SIGBUS) | |
466 && pc >= MacroAssembler::_verify_oop_implicit_branch[0] | |
467 && pc < MacroAssembler::_verify_oop_implicit_branch[1] ) { | |
468 stub = MacroAssembler::_verify_oop_implicit_branch[2]; | |
469 warning("fixed up memory fault in +VerifyOops at address " INTPTR_FORMAT, info->si_addr); | |
470 } | |
471 | |
472 // This is not factored because on x86 solaris the patching for | |
473 // zombies does not generate a SEGV. | |
474 else if (sig == SIGSEGV && nativeInstruction_at(pc)->is_zombie()) { | |
475 // zombie method (ld [%g0],%o7 instruction) | |
476 stub = SharedRuntime::get_handle_wrong_method_stub(); | |
477 | |
478 // At the stub it needs to look like a call from the caller of this | |
479 // method (not a call from the segv site). | |
480 pc = (address)uc->uc_mcontext.gregs[REG_O7]; | |
481 } | |
482 else if (sig == SIGBUS && info->si_code == BUS_OBJERR) { | |
483 // BugId 4454115: A read from a MappedByteBuffer can fault | |
484 // here if the underlying file has been truncated. | |
485 // Do not crash the VM in such a case. | |
486 CodeBlob* cb = CodeCache::find_blob_unsafe(pc); | |
487 nmethod* nm = cb->is_nmethod() ? (nmethod*)cb : NULL; | |
488 if (nm != NULL && nm->has_unsafe_access()) { | |
489 stub = StubRoutines::handler_for_unsafe_access(); | |
490 } | |
491 } | |
492 | |
493 else if (sig == SIGFPE && info->si_code == FPE_INTDIV) { | |
494 // integer divide by zero | |
495 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); | |
496 } | |
497 else if (sig == SIGFPE && info->si_code == FPE_FLTDIV) { | |
498 // floating-point divide by zero | |
499 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); | |
500 } | |
501 #ifdef COMPILER2 | |
502 else if (sig == SIGILL && nativeInstruction_at(pc)->is_ic_miss_trap()) { | |
503 #ifdef ASSERT | |
504 #ifdef TIERED | |
505 CodeBlob* cb = CodeCache::find_blob_unsafe(pc); | |
506 assert(cb->is_compiled_by_c2(), "Wrong compiler"); | |
507 #endif // TIERED | |
508 #endif // ASSERT | |
509 // Inline cache missed and user trap "Tne G0+ST_RESERVED_FOR_USER_0+2" taken. | |
510 stub = SharedRuntime::get_ic_miss_stub(); | |
511 // At the stub it needs to look like a call from the caller of this | |
512 // method (not a call from the segv site). | |
513 pc = (address)uc->uc_mcontext.gregs[REG_O7]; | |
514 } | |
515 #endif // COMPILER2 | |
516 | |
517 else if (sig == SIGSEGV && info->si_code > 0 && !MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) { | |
518 // Determination of interpreter/vtable stub/compiled code null exception | |
519 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); | |
520 } | |
521 } | |
522 | |
523 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in | |
524 // and the heap gets shrunk before the field access. | |
525 if ((sig == SIGSEGV) || (sig == SIGBUS)) { | |
526 address addr = JNI_FastGetField::find_slowcase_pc(pc); | |
527 if (addr != (address)-1) { | |
528 stub = addr; | |
529 } | |
530 } | |
531 | |
532 // Check to see if we caught the safepoint code in the | |
533 // process of write protecting the memory serialization page. | |
534 // It write enables the page immediately after protecting it | |
535 // so just return. | |
536 if ((sig == SIGSEGV) && | |
537 os::is_memory_serialize_page(thread, (address)info->si_addr)) { | |
538 // Block current thread until the memory serialize page permission restored. | |
539 os::block_on_serialize_page_trap(); | |
540 return true; | |
541 } | |
542 } | |
543 | |
544 if (stub != NULL) { | |
545 // save all thread context in case we need to restore it | |
546 | |
547 thread->set_saved_exception_pc(pc); | |
548 thread->set_saved_exception_npc(npc); | |
549 | |
550 // simulate a branch to the stub (a "call" in the safepoint stub case) | |
551 // factor me: setPC | |
552 uc->uc_mcontext.gregs[REG_PC ] = (greg_t)stub; | |
553 uc->uc_mcontext.gregs[REG_nPC] = (greg_t)(stub + 4); | |
554 | |
555 #ifndef PRODUCT | |
556 if (TraceJumps) thread->record_jump(stub, NULL, __FILE__, __LINE__); | |
557 #endif /* PRODUCT */ | |
558 | |
559 return true; | |
560 } | |
561 | |
562 // signal-chaining | |
563 if (os::Solaris::chained_handler(sig, info, ucVoid)) { | |
564 return true; | |
565 } | |
566 | |
567 if (!abort_if_unrecognized) { | |
568 // caller wants another chance, so give it to him | |
569 return false; | |
570 } | |
571 | |
572 if (!os::Solaris::libjsig_is_loaded) { | |
573 struct sigaction oldAct; | |
574 sigaction(sig, (struct sigaction *)0, &oldAct); | |
575 if (oldAct.sa_sigaction != signalHandler) { | |
576 void* sighand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) | |
577 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); | |
605 | 578 warning("Unexpected Signal %d occurred under user-defined signal handler " INTPTR_FORMAT, sig, (intptr_t)sighand); |
0 | 579 } |
580 } | |
581 | |
582 if (pc == NULL && uc != NULL) { | |
583 pc = (address) uc->uc_mcontext.gregs[REG_PC]; | |
584 } | |
585 | |
1907 | 586 // Sometimes the register windows are not properly flushed. |
587 if(uc->uc_mcontext.gwins != NULL) { | |
588 ::handle_unflushed_register_windows(uc->uc_mcontext.gwins); | |
589 } | |
590 | |
0 | 591 // unmask current signal |
592 sigset_t newset; | |
593 sigemptyset(&newset); | |
594 sigaddset(&newset, sig); | |
595 sigprocmask(SIG_UNBLOCK, &newset, NULL); | |
596 | |
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597 // Determine which sort of error to throw. Out of swap may signal |
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598 // on the thread stack, which could get a mapping error when touched. |
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599 address addr = (address) info->si_addr; |
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600 if (sig == SIGBUS && info->si_code == BUS_OBJERR && info->si_errno == ENOMEM) { |
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601 vm_exit_out_of_memory(0, "Out of swap space to map in thread stack."); |
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602 } |
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603 |
0 | 604 VMError err(t, sig, pc, info, ucVoid); |
605 err.report_and_die(); | |
606 | |
607 ShouldNotReachHere(); | |
608 } | |
609 | |
610 void os::print_context(outputStream *st, void *context) { | |
611 if (context == NULL) return; | |
612 | |
613 ucontext_t *uc = (ucontext_t*)context; | |
614 st->print_cr("Registers:"); | |
615 | |
1907 | 616 st->print_cr(" G1=" INTPTR_FORMAT " G2=" INTPTR_FORMAT |
617 " G3=" INTPTR_FORMAT " G4=" INTPTR_FORMAT, | |
618 uc->uc_mcontext.gregs[REG_G1], | |
619 uc->uc_mcontext.gregs[REG_G2], | |
620 uc->uc_mcontext.gregs[REG_G3], | |
621 uc->uc_mcontext.gregs[REG_G4]); | |
622 st->print_cr(" G5=" INTPTR_FORMAT " G6=" INTPTR_FORMAT | |
623 " G7=" INTPTR_FORMAT " Y=" INTPTR_FORMAT, | |
624 uc->uc_mcontext.gregs[REG_G5], | |
625 uc->uc_mcontext.gregs[REG_G6], | |
626 uc->uc_mcontext.gregs[REG_G7], | |
627 uc->uc_mcontext.gregs[REG_Y]); | |
0 | 628 st->print_cr(" O0=" INTPTR_FORMAT " O1=" INTPTR_FORMAT |
629 " O2=" INTPTR_FORMAT " O3=" INTPTR_FORMAT, | |
630 uc->uc_mcontext.gregs[REG_O0], | |
631 uc->uc_mcontext.gregs[REG_O1], | |
632 uc->uc_mcontext.gregs[REG_O2], | |
633 uc->uc_mcontext.gregs[REG_O3]); | |
634 st->print_cr(" O4=" INTPTR_FORMAT " O5=" INTPTR_FORMAT | |
635 " O6=" INTPTR_FORMAT " O7=" INTPTR_FORMAT, | |
636 uc->uc_mcontext.gregs[REG_O4], | |
637 uc->uc_mcontext.gregs[REG_O5], | |
638 uc->uc_mcontext.gregs[REG_O6], | |
639 uc->uc_mcontext.gregs[REG_O7]); | |
640 | |
1907 | 641 |
642 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc); | |
643 st->print_cr(" L0=" INTPTR_FORMAT " L1=" INTPTR_FORMAT | |
644 " L2=" INTPTR_FORMAT " L3=" INTPTR_FORMAT, | |
645 sp[L0->sp_offset_in_saved_window()], | |
646 sp[L1->sp_offset_in_saved_window()], | |
647 sp[L2->sp_offset_in_saved_window()], | |
648 sp[L3->sp_offset_in_saved_window()]); | |
649 st->print_cr(" L4=" INTPTR_FORMAT " L5=" INTPTR_FORMAT | |
650 " L6=" INTPTR_FORMAT " L7=" INTPTR_FORMAT, | |
651 sp[L4->sp_offset_in_saved_window()], | |
652 sp[L5->sp_offset_in_saved_window()], | |
653 sp[L6->sp_offset_in_saved_window()], | |
654 sp[L7->sp_offset_in_saved_window()]); | |
655 st->print_cr(" I0=" INTPTR_FORMAT " I1=" INTPTR_FORMAT | |
656 " I2=" INTPTR_FORMAT " I3=" INTPTR_FORMAT, | |
657 sp[I0->sp_offset_in_saved_window()], | |
658 sp[I1->sp_offset_in_saved_window()], | |
659 sp[I2->sp_offset_in_saved_window()], | |
660 sp[I3->sp_offset_in_saved_window()]); | |
661 st->print_cr(" I4=" INTPTR_FORMAT " I5=" INTPTR_FORMAT | |
662 " I6=" INTPTR_FORMAT " I7=" INTPTR_FORMAT, | |
663 sp[I4->sp_offset_in_saved_window()], | |
664 sp[I5->sp_offset_in_saved_window()], | |
665 sp[I6->sp_offset_in_saved_window()], | |
666 sp[I7->sp_offset_in_saved_window()]); | |
0 | 667 |
668 st->print_cr(" PC=" INTPTR_FORMAT " nPC=" INTPTR_FORMAT, | |
669 uc->uc_mcontext.gregs[REG_PC], | |
670 uc->uc_mcontext.gregs[REG_nPC]); | |
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671 st->cr(); |
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672 st->cr(); |
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673 |
0 | 674 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp); |
675 print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t)); | |
676 st->cr(); | |
677 | |
678 // Note: it may be unsafe to inspect memory near pc. For example, pc may | |
679 // point to garbage if entry point in an nmethod is corrupted. Leave | |
680 // this at the end, and hope for the best. | |
681 ExtendedPC epc = os::Solaris::ucontext_get_ExtendedPC(uc); | |
682 address pc = epc.pc(); | |
683 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc); | |
1907 | 684 print_hex_dump(st, pc - 32, pc + 32, sizeof(char)); |
685 } | |
686 | |
687 void os::print_register_info(outputStream *st, void *context) { | |
688 if (context == NULL) return; | |
689 | |
690 ucontext_t *uc = (ucontext_t*)context; | |
691 intptr_t *sp = (intptr_t *)os::Solaris::ucontext_get_sp(uc); | |
692 | |
693 st->print_cr("Register to memory mapping:"); | |
694 st->cr(); | |
695 | |
696 // this is only for the "general purpose" registers | |
697 st->print("G1="); print_location(st, uc->uc_mcontext.gregs[REG_G1]); | |
698 st->print("G2="); print_location(st, uc->uc_mcontext.gregs[REG_G2]); | |
699 st->print("G3="); print_location(st, uc->uc_mcontext.gregs[REG_G3]); | |
700 st->print("G4="); print_location(st, uc->uc_mcontext.gregs[REG_G4]); | |
701 st->print("G5="); print_location(st, uc->uc_mcontext.gregs[REG_G5]); | |
702 st->print("G6="); print_location(st, uc->uc_mcontext.gregs[REG_G6]); | |
703 st->print("G7="); print_location(st, uc->uc_mcontext.gregs[REG_G7]); | |
704 st->cr(); | |
705 | |
706 st->print("O0="); print_location(st, uc->uc_mcontext.gregs[REG_O0]); | |
707 st->print("O1="); print_location(st, uc->uc_mcontext.gregs[REG_O1]); | |
708 st->print("O2="); print_location(st, uc->uc_mcontext.gregs[REG_O2]); | |
709 st->print("O3="); print_location(st, uc->uc_mcontext.gregs[REG_O3]); | |
710 st->print("O4="); print_location(st, uc->uc_mcontext.gregs[REG_O4]); | |
711 st->print("O5="); print_location(st, uc->uc_mcontext.gregs[REG_O5]); | |
712 st->print("O6="); print_location(st, uc->uc_mcontext.gregs[REG_O6]); | |
713 st->print("O7="); print_location(st, uc->uc_mcontext.gregs[REG_O7]); | |
714 st->cr(); | |
715 | |
716 st->print("L0="); print_location(st, sp[L0->sp_offset_in_saved_window()]); | |
717 st->print("L1="); print_location(st, sp[L1->sp_offset_in_saved_window()]); | |
718 st->print("L2="); print_location(st, sp[L2->sp_offset_in_saved_window()]); | |
719 st->print("L3="); print_location(st, sp[L3->sp_offset_in_saved_window()]); | |
720 st->print("L4="); print_location(st, sp[L4->sp_offset_in_saved_window()]); | |
721 st->print("L5="); print_location(st, sp[L5->sp_offset_in_saved_window()]); | |
722 st->print("L6="); print_location(st, sp[L6->sp_offset_in_saved_window()]); | |
723 st->print("L7="); print_location(st, sp[L7->sp_offset_in_saved_window()]); | |
724 st->cr(); | |
725 | |
726 st->print("I0="); print_location(st, sp[I0->sp_offset_in_saved_window()]); | |
727 st->print("I1="); print_location(st, sp[I1->sp_offset_in_saved_window()]); | |
728 st->print("I2="); print_location(st, sp[I2->sp_offset_in_saved_window()]); | |
729 st->print("I3="); print_location(st, sp[I3->sp_offset_in_saved_window()]); | |
730 st->print("I4="); print_location(st, sp[I4->sp_offset_in_saved_window()]); | |
731 st->print("I5="); print_location(st, sp[I5->sp_offset_in_saved_window()]); | |
732 st->print("I6="); print_location(st, sp[I6->sp_offset_in_saved_window()]); | |
733 st->print("I7="); print_location(st, sp[I7->sp_offset_in_saved_window()]); | |
734 st->cr(); | |
0 | 735 } |
736 | |
737 void os::Solaris::init_thread_fpu_state(void) { | |
738 // Nothing needed on Sparc. | |
739 } | |
740 | |
741 #if !defined(COMPILER2) && !defined(_LP64) | |
742 | |
743 // These routines are the initial value of atomic_xchg_entry(), | |
744 // atomic_cmpxchg_entry(), atomic_add_entry() and fence_entry() | |
745 // until initialization is complete. | |
746 // TODO - remove when the VM drops support for V8. | |
747 | |
748 typedef jint xchg_func_t (jint, volatile jint*); | |
749 typedef jint cmpxchg_func_t (jint, volatile jint*, jint); | |
750 typedef jlong cmpxchg_long_func_t(jlong, volatile jlong*, jlong); | |
751 typedef jint add_func_t (jint, volatile jint*); | |
752 | |
753 jint os::atomic_xchg_bootstrap(jint exchange_value, volatile jint* dest) { | |
754 // try to use the stub: | |
755 xchg_func_t* func = CAST_TO_FN_PTR(xchg_func_t*, StubRoutines::atomic_xchg_entry()); | |
756 | |
757 if (func != NULL) { | |
758 os::atomic_xchg_func = func; | |
759 return (*func)(exchange_value, dest); | |
760 } | |
761 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
762 | |
763 jint old_value = *dest; | |
764 *dest = exchange_value; | |
765 return old_value; | |
766 } | |
767 | |
768 jint os::atomic_cmpxchg_bootstrap(jint exchange_value, volatile jint* dest, jint compare_value) { | |
769 // try to use the stub: | |
770 cmpxchg_func_t* func = CAST_TO_FN_PTR(cmpxchg_func_t*, StubRoutines::atomic_cmpxchg_entry()); | |
771 | |
772 if (func != NULL) { | |
773 os::atomic_cmpxchg_func = func; | |
774 return (*func)(exchange_value, dest, compare_value); | |
775 } | |
776 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
777 | |
778 jint old_value = *dest; | |
779 if (old_value == compare_value) | |
780 *dest = exchange_value; | |
781 return old_value; | |
782 } | |
783 | |
784 jlong os::atomic_cmpxchg_long_bootstrap(jlong exchange_value, volatile jlong* dest, jlong compare_value) { | |
785 // try to use the stub: | |
786 cmpxchg_long_func_t* func = CAST_TO_FN_PTR(cmpxchg_long_func_t*, StubRoutines::atomic_cmpxchg_long_entry()); | |
787 | |
788 if (func != NULL) { | |
789 os::atomic_cmpxchg_long_func = func; | |
790 return (*func)(exchange_value, dest, compare_value); | |
791 } | |
792 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
793 | |
794 jlong old_value = *dest; | |
795 if (old_value == compare_value) | |
796 *dest = exchange_value; | |
797 return old_value; | |
798 } | |
799 | |
800 jint os::atomic_add_bootstrap(jint add_value, volatile jint* dest) { | |
801 // try to use the stub: | |
802 add_func_t* func = CAST_TO_FN_PTR(add_func_t*, StubRoutines::atomic_add_entry()); | |
803 | |
804 if (func != NULL) { | |
805 os::atomic_add_func = func; | |
806 return (*func)(add_value, dest); | |
807 } | |
808 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
809 | |
810 return (*dest) += add_value; | |
811 } | |
812 | |
813 xchg_func_t* os::atomic_xchg_func = os::atomic_xchg_bootstrap; | |
814 cmpxchg_func_t* os::atomic_cmpxchg_func = os::atomic_cmpxchg_bootstrap; | |
815 cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap; | |
816 add_func_t* os::atomic_add_func = os::atomic_add_bootstrap; | |
817 | |
818 #endif // !_LP64 && !COMPILER2 | |
819 | |
820 #if defined(__sparc) && defined(COMPILER2) && defined(_GNU_SOURCE) | |
821 // See file build/solaris/makefiles/$compiler.make | |
822 // For compiler1 the architecture is v8 and frps isn't present in v8 | |
823 extern "C" void _mark_fpu_nosave() { | |
824 __asm__ __volatile__ ("wr %%g0, 0, %%fprs \n\t" : : :); | |
825 } | |
826 #endif //defined(__sparc) && defined(COMPILER2) | |
5903
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827 |
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828 #ifndef PRODUCT |
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829 void os::verify_stack_alignment() { |
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830 } |
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831 #endif |