Mercurial > hg > truffle
annotate src/os_cpu/linux_zero/vm/os_linux_zero.cpp @ 5923:8a48c2906f91
7150046: SIGILL on sparcv9 fastdebug
Summary: Breakpoint needs to do 64-bit compare for pointers on sparcv9
Reviewed-by: coleenp, never
Contributed-by: dean.long@oracle.com
author | coleenp |
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date | Mon, 05 Mar 2012 14:19:00 -0500 |
parents | 1d1603768966 |
children | da4be62fb889 |
rev | line source |
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1010 | 1 /* |
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2 * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved. |
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3 * Copyright 2007, 2008, 2009, 2010 Red Hat, Inc. |
1010 | 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
5 * | |
6 * This code is free software; you can redistribute it and/or modify it | |
7 * under the terms of the GNU General Public License version 2 only, as | |
8 * published by the Free Software Foundation. | |
9 * | |
10 * This code is distributed in the hope that it will be useful, but WITHOUT | |
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
13 * version 2 for more details (a copy is included in the LICENSE file that | |
14 * accompanied this code). | |
15 * | |
16 * You should have received a copy of the GNU General Public License version | |
17 * 2 along with this work; if not, write to the Free Software Foundation, | |
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
19 * | |
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20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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21 * or visit www.oracle.com if you need additional information or have any |
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22 * questions. |
1010 | 23 * |
24 */ | |
25 | |
1972 | 26 // no precompiled headers |
27 #include "assembler_zero.inline.hpp" | |
28 #include "classfile/classLoader.hpp" | |
29 #include "classfile/systemDictionary.hpp" | |
30 #include "classfile/vmSymbols.hpp" | |
31 #include "code/icBuffer.hpp" | |
32 #include "code/vtableStubs.hpp" | |
33 #include "interpreter/interpreter.hpp" | |
34 #include "jvm_linux.h" | |
35 #include "memory/allocation.inline.hpp" | |
36 #include "mutex_linux.inline.hpp" | |
37 #include "nativeInst_zero.hpp" | |
38 #include "os_share_linux.hpp" | |
39 #include "prims/jniFastGetField.hpp" | |
40 #include "prims/jvm.h" | |
41 #include "prims/jvm_misc.hpp" | |
42 #include "runtime/arguments.hpp" | |
43 #include "runtime/extendedPC.hpp" | |
44 #include "runtime/frame.inline.hpp" | |
45 #include "runtime/interfaceSupport.hpp" | |
46 #include "runtime/java.hpp" | |
47 #include "runtime/javaCalls.hpp" | |
48 #include "runtime/mutexLocker.hpp" | |
49 #include "runtime/osThread.hpp" | |
50 #include "runtime/sharedRuntime.hpp" | |
51 #include "runtime/stubRoutines.hpp" | |
52 #include "runtime/timer.hpp" | |
53 #include "thread_linux.inline.hpp" | |
54 #include "utilities/events.hpp" | |
55 #include "utilities/vmError.hpp" | |
56 #ifdef COMPILER1 | |
57 #include "c1/c1_Runtime1.hpp" | |
58 #endif | |
59 #ifdef COMPILER2 | |
60 #include "opto/runtime.hpp" | |
61 #endif | |
1010 | 62 |
63 address os::current_stack_pointer() { | |
64 address dummy = (address) &dummy; | |
65 return dummy; | |
66 } | |
67 | |
68 frame os::get_sender_for_C_frame(frame* fr) { | |
69 ShouldNotCallThis(); | |
70 } | |
71 | |
72 frame os::current_frame() { | |
73 // The only thing that calls this is the stack printing code in | |
74 // VMError::report: | |
75 // - Step 110 (printing stack bounds) uses the sp in the frame | |
76 // to determine the amount of free space on the stack. We | |
77 // set the sp to a close approximation of the real value in | |
78 // order to allow this step to complete. | |
79 // - Step 120 (printing native stack) tries to walk the stack. | |
80 // The frame we create has a NULL pc, which is ignored as an | |
81 // invalid frame. | |
82 frame dummy = frame(); | |
83 dummy.set_sp((intptr_t *) current_stack_pointer()); | |
84 return dummy; | |
85 } | |
86 | |
87 char* os::non_memory_address_word() { | |
88 // Must never look like an address returned by reserve_memory, | |
89 // even in its subfields (as defined by the CPU immediate fields, | |
90 // if the CPU splits constants across multiple instructions). | |
91 #ifdef SPARC | |
92 // On SPARC, 0 != %hi(any real address), because there is no | |
93 // allocation in the first 1Kb of the virtual address space. | |
94 return (char *) 0; | |
95 #else | |
96 // This is the value for x86; works pretty well for PPC too. | |
97 return (char *) -1; | |
98 #endif // SPARC | |
99 } | |
100 | |
101 void os::initialize_thread() { | |
102 // Nothing to do. | |
103 } | |
104 | |
105 address os::Linux::ucontext_get_pc(ucontext_t* uc) { | |
106 ShouldNotCallThis(); | |
107 } | |
108 | |
109 ExtendedPC os::fetch_frame_from_context(void* ucVoid, | |
110 intptr_t** ret_sp, | |
111 intptr_t** ret_fp) { | |
112 ShouldNotCallThis(); | |
113 } | |
114 | |
115 frame os::fetch_frame_from_context(void* ucVoid) { | |
116 ShouldNotCallThis(); | |
117 } | |
118 | |
2191 | 119 extern "C" JNIEXPORT int |
1010 | 120 JVM_handle_linux_signal(int sig, |
121 siginfo_t* info, | |
122 void* ucVoid, | |
123 int abort_if_unrecognized) { | |
124 ucontext_t* uc = (ucontext_t*) ucVoid; | |
125 | |
126 Thread* t = ThreadLocalStorage::get_thread_slow(); | |
127 | |
128 SignalHandlerMark shm(t); | |
129 | |
130 // Note: it's not uncommon that JNI code uses signal/sigset to | |
131 // install then restore certain signal handler (e.g. to temporarily | |
132 // block SIGPIPE, or have a SIGILL handler when detecting CPU | |
133 // type). When that happens, JVM_handle_linux_signal() might be | |
134 // invoked with junk info/ucVoid. To avoid unnecessary crash when | |
135 // libjsig is not preloaded, try handle signals that do not require | |
136 // siginfo/ucontext first. | |
137 | |
138 if (sig == SIGPIPE || sig == SIGXFSZ) { | |
139 // allow chained handler to go first | |
140 if (os::Linux::chained_handler(sig, info, ucVoid)) { | |
141 return true; | |
142 } else { | |
143 if (PrintMiscellaneous && (WizardMode || Verbose)) { | |
144 char buf[64]; | |
145 warning("Ignoring %s - see bugs 4229104 or 646499219", | |
146 os::exception_name(sig, buf, sizeof(buf))); | |
147 } | |
148 return true; | |
149 } | |
150 } | |
151 | |
152 JavaThread* thread = NULL; | |
153 VMThread* vmthread = NULL; | |
154 if (os::Linux::signal_handlers_are_installed) { | |
155 if (t != NULL ){ | |
156 if(t->is_Java_thread()) { | |
157 thread = (JavaThread*)t; | |
158 } | |
159 else if(t->is_VM_thread()){ | |
160 vmthread = (VMThread *)t; | |
161 } | |
162 } | |
163 } | |
164 | |
165 if (info != NULL && thread != NULL) { | |
166 // Handle ALL stack overflow variations here | |
167 if (sig == SIGSEGV) { | |
168 address addr = (address) info->si_addr; | |
169 | |
170 // check if fault address is within thread stack | |
171 if (addr < thread->stack_base() && | |
172 addr >= thread->stack_base() - thread->stack_size()) { | |
173 // stack overflow | |
174 if (thread->in_stack_yellow_zone(addr)) { | |
175 thread->disable_stack_yellow_zone(); | |
176 ShouldNotCallThis(); | |
177 } | |
178 else if (thread->in_stack_red_zone(addr)) { | |
179 thread->disable_stack_red_zone(); | |
180 ShouldNotCallThis(); | |
181 } | |
182 else { | |
183 // Accessing stack address below sp may cause SEGV if | |
184 // current thread has MAP_GROWSDOWN stack. This should | |
185 // only happen when current thread was created by user | |
186 // code with MAP_GROWSDOWN flag and then attached to VM. | |
187 // See notes in os_linux.cpp. | |
188 if (thread->osthread()->expanding_stack() == 0) { | |
189 thread->osthread()->set_expanding_stack(); | |
190 if (os::Linux::manually_expand_stack(thread, addr)) { | |
191 thread->osthread()->clear_expanding_stack(); | |
192 return true; | |
193 } | |
194 thread->osthread()->clear_expanding_stack(); | |
195 } | |
196 else { | |
197 fatal("recursive segv. expanding stack."); | |
198 } | |
199 } | |
200 } | |
201 } | |
202 | |
203 /*if (thread->thread_state() == _thread_in_Java) { | |
204 ShouldNotCallThis(); | |
205 } | |
206 else*/ if (thread->thread_state() == _thread_in_vm && | |
207 sig == SIGBUS && thread->doing_unsafe_access()) { | |
208 ShouldNotCallThis(); | |
209 } | |
210 | |
211 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC | |
212 // kicks in and the heap gets shrunk before the field access. | |
213 /*if (sig == SIGSEGV || sig == SIGBUS) { | |
214 address addr = JNI_FastGetField::find_slowcase_pc(pc); | |
215 if (addr != (address)-1) { | |
216 stub = addr; | |
217 } | |
218 }*/ | |
219 | |
220 // Check to see if we caught the safepoint code in the process | |
221 // of write protecting the memory serialization page. It write | |
222 // enables the page immediately after protecting it so we can | |
223 // just return to retry the write. | |
224 if (sig == SIGSEGV && | |
225 os::is_memory_serialize_page(thread, (address) info->si_addr)) { | |
226 // Block current thread until permission is restored. | |
227 os::block_on_serialize_page_trap(); | |
228 return true; | |
229 } | |
230 } | |
231 | |
232 // signal-chaining | |
233 if (os::Linux::chained_handler(sig, info, ucVoid)) { | |
234 return true; | |
235 } | |
236 | |
237 if (!abort_if_unrecognized) { | |
238 // caller wants another chance, so give it to him | |
239 return false; | |
240 } | |
241 | |
242 #ifndef PRODUCT | |
243 if (sig == SIGSEGV) { | |
244 fatal("\n#" | |
245 "\n# /--------------------\\" | |
246 "\n# | segmentation fault |" | |
247 "\n# \\---\\ /--------------/" | |
248 "\n# /" | |
249 "\n# [-] |\\_/| " | |
250 "\n# (+)=C |o o|__ " | |
251 "\n# | | =-*-=__\\ " | |
252 "\n# OOO c_c_(___)"); | |
253 } | |
254 #endif // !PRODUCT | |
255 | |
256 const char *fmt = "caught unhandled signal %d"; | |
257 char buf[64]; | |
258 | |
259 sprintf(buf, fmt, sig); | |
260 fatal(buf); | |
261 } | |
262 | |
263 void os::Linux::init_thread_fpu_state(void) { | |
264 // Nothing to do | |
265 } | |
266 | |
267 int os::Linux::get_fpu_control_word() { | |
268 ShouldNotCallThis(); | |
269 } | |
270 | |
271 void os::Linux::set_fpu_control_word(int fpu) { | |
272 ShouldNotCallThis(); | |
273 } | |
274 | |
275 bool os::is_allocatable(size_t bytes) { | |
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276 #ifdef _LP64 |
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277 return true; |
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278 #else |
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279 if (bytes < 2 * G) { |
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280 return true; |
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281 } |
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282 |
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283 char* addr = reserve_memory(bytes, NULL); |
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284 |
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285 if (addr != NULL) { |
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286 release_memory(addr, bytes); |
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287 } |
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288 |
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289 return addr != NULL; |
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290 #endif // _LP64 |
1010 | 291 } |
292 | |
293 /////////////////////////////////////////////////////////////////////////////// | |
294 // thread stack | |
295 | |
296 size_t os::Linux::min_stack_allowed = 64 * K; | |
297 | |
298 bool os::Linux::supports_variable_stack_size() { | |
299 return true; | |
300 } | |
301 | |
302 size_t os::Linux::default_stack_size(os::ThreadType thr_type) { | |
303 #ifdef _LP64 | |
304 size_t s = (thr_type == os::compiler_thread ? 4 * M : 1 * M); | |
305 #else | |
306 size_t s = (thr_type == os::compiler_thread ? 2 * M : 512 * K); | |
307 #endif // _LP64 | |
308 return s; | |
309 } | |
310 | |
311 size_t os::Linux::default_guard_size(os::ThreadType thr_type) { | |
312 // Only enable glibc guard pages for non-Java threads | |
313 // (Java threads have HotSpot guard pages) | |
314 return (thr_type == java_thread ? 0 : page_size()); | |
315 } | |
316 | |
317 static void current_stack_region(address *bottom, size_t *size) { | |
318 pthread_attr_t attr; | |
319 int res = pthread_getattr_np(pthread_self(), &attr); | |
320 if (res != 0) { | |
321 if (res == ENOMEM) { | |
322 vm_exit_out_of_memory(0, "pthread_getattr_np"); | |
323 } | |
324 else { | |
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325 fatal(err_msg("pthread_getattr_np failed with errno = %d", res)); |
1010 | 326 } |
327 } | |
328 | |
329 address stack_bottom; | |
330 size_t stack_bytes; | |
331 res = pthread_attr_getstack(&attr, (void **) &stack_bottom, &stack_bytes); | |
332 if (res != 0) { | |
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333 fatal(err_msg("pthread_attr_getstack failed with errno = %d", res)); |
1010 | 334 } |
335 address stack_top = stack_bottom + stack_bytes; | |
336 | |
337 // The block of memory returned by pthread_attr_getstack() includes | |
338 // guard pages where present. We need to trim these off. | |
339 size_t page_bytes = os::Linux::page_size(); | |
340 assert(((intptr_t) stack_bottom & (page_bytes - 1)) == 0, "unaligned stack"); | |
341 | |
342 size_t guard_bytes; | |
343 res = pthread_attr_getguardsize(&attr, &guard_bytes); | |
344 if (res != 0) { | |
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345 fatal(err_msg("pthread_attr_getguardsize failed with errno = %d", res)); |
1010 | 346 } |
347 int guard_pages = align_size_up(guard_bytes, page_bytes) / page_bytes; | |
348 assert(guard_bytes == guard_pages * page_bytes, "unaligned guard"); | |
349 | |
350 #ifdef IA64 | |
351 // IA64 has two stacks sharing the same area of memory, a normal | |
352 // stack growing downwards and a register stack growing upwards. | |
353 // Guard pages, if present, are in the centre. This code splits | |
354 // the stack in two even without guard pages, though in theory | |
355 // there's nothing to stop us allocating more to the normal stack | |
356 // or more to the register stack if one or the other were found | |
357 // to grow faster. | |
358 int total_pages = align_size_down(stack_bytes, page_bytes) / page_bytes; | |
359 stack_bottom += (total_pages - guard_pages) / 2 * page_bytes; | |
360 #endif // IA64 | |
361 | |
362 stack_bottom += guard_bytes; | |
363 | |
364 pthread_attr_destroy(&attr); | |
365 | |
366 // The initial thread has a growable stack, and the size reported | |
367 // by pthread_attr_getstack is the maximum size it could possibly | |
368 // be given what currently mapped. This can be huge, so we cap it. | |
369 if (os::Linux::is_initial_thread()) { | |
370 stack_bytes = stack_top - stack_bottom; | |
371 | |
372 if (stack_bytes > JavaThread::stack_size_at_create()) | |
373 stack_bytes = JavaThread::stack_size_at_create(); | |
374 | |
375 stack_bottom = stack_top - stack_bytes; | |
376 } | |
377 | |
378 assert(os::current_stack_pointer() >= stack_bottom, "should do"); | |
379 assert(os::current_stack_pointer() < stack_top, "should do"); | |
380 | |
381 *bottom = stack_bottom; | |
382 *size = stack_top - stack_bottom; | |
383 } | |
384 | |
385 address os::current_stack_base() { | |
386 address bottom; | |
387 size_t size; | |
388 current_stack_region(&bottom, &size); | |
389 return bottom + size; | |
390 } | |
391 | |
392 size_t os::current_stack_size() { | |
393 // stack size includes normal stack and HotSpot guard pages | |
394 address bottom; | |
395 size_t size; | |
396 current_stack_region(&bottom, &size); | |
397 return size; | |
398 } | |
399 | |
400 ///////////////////////////////////////////////////////////////////////////// | |
401 // helper functions for fatal error handler | |
402 | |
403 void os::print_context(outputStream* st, void* context) { | |
404 ShouldNotCallThis(); | |
405 } | |
406 | |
1970 | 407 void os::print_register_info(outputStream *st, void *context) { |
408 ShouldNotCallThis(); | |
409 } | |
410 | |
1010 | 411 ///////////////////////////////////////////////////////////////////////////// |
412 // Stubs for things that would be in linux_zero.s if it existed. | |
413 // You probably want to disassemble these monkeys to check they're ok. | |
414 | |
415 extern "C" { | |
416 int SpinPause() { | |
417 } | |
418 | |
419 int SafeFetch32(int *adr, int errValue) { | |
420 int value = errValue; | |
421 value = *adr; | |
422 return value; | |
423 } | |
424 intptr_t SafeFetchN(intptr_t *adr, intptr_t errValue) { | |
425 intptr_t value = errValue; | |
426 value = *adr; | |
427 return value; | |
428 } | |
429 | |
430 void _Copy_conjoint_jshorts_atomic(jshort* from, jshort* to, size_t count) { | |
431 if (from > to) { | |
432 jshort *end = from + count; | |
433 while (from < end) | |
434 *(to++) = *(from++); | |
435 } | |
436 else if (from < to) { | |
437 jshort *end = from; | |
438 from += count - 1; | |
439 to += count - 1; | |
440 while (from >= end) | |
441 *(to--) = *(from--); | |
442 } | |
443 } | |
444 void _Copy_conjoint_jints_atomic(jint* from, jint* to, size_t count) { | |
445 if (from > to) { | |
446 jint *end = from + count; | |
447 while (from < end) | |
448 *(to++) = *(from++); | |
449 } | |
450 else if (from < to) { | |
451 jint *end = from; | |
452 from += count - 1; | |
453 to += count - 1; | |
454 while (from >= end) | |
455 *(to--) = *(from--); | |
456 } | |
457 } | |
458 void _Copy_conjoint_jlongs_atomic(jlong* from, jlong* to, size_t count) { | |
459 if (from > to) { | |
460 jlong *end = from + count; | |
461 while (from < end) | |
462 os::atomic_copy64(from++, to++); | |
463 } | |
464 else if (from < to) { | |
465 jlong *end = from; | |
466 from += count - 1; | |
467 to += count - 1; | |
468 while (from >= end) | |
469 os::atomic_copy64(from--, to--); | |
470 } | |
471 } | |
472 | |
473 void _Copy_arrayof_conjoint_bytes(HeapWord* from, | |
474 HeapWord* to, | |
475 size_t count) { | |
1729 | 476 memmove(to, from, count); |
1010 | 477 } |
478 void _Copy_arrayof_conjoint_jshorts(HeapWord* from, | |
479 HeapWord* to, | |
480 size_t count) { | |
1729 | 481 memmove(to, from, count * 2); |
1010 | 482 } |
483 void _Copy_arrayof_conjoint_jints(HeapWord* from, | |
484 HeapWord* to, | |
485 size_t count) { | |
1729 | 486 memmove(to, from, count * 4); |
1010 | 487 } |
488 void _Copy_arrayof_conjoint_jlongs(HeapWord* from, | |
489 HeapWord* to, | |
490 size_t count) { | |
1729 | 491 memmove(to, from, count * 8); |
1010 | 492 } |
493 }; | |
494 | |
495 ///////////////////////////////////////////////////////////////////////////// | |
496 // Implementations of atomic operations not supported by processors. | |
497 // -- http://gcc.gnu.org/onlinedocs/gcc-4.2.1/gcc/Atomic-Builtins.html | |
498 | |
499 #ifndef _LP64 | |
500 extern "C" { | |
501 long long unsigned int __sync_val_compare_and_swap_8( | |
502 volatile void *ptr, | |
503 long long unsigned int oldval, | |
504 long long unsigned int newval) { | |
505 ShouldNotCallThis(); | |
506 } | |
507 }; | |
508 #endif // !_LP64 |