|
3960
|
1 /*
|
|
|
2 * Copyright (c) 1999, 2011, 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 "assembler_x86.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_bsd.h"
|
|
|
34 #include "memory/allocation.inline.hpp"
|
|
|
35 #include "mutex_bsd.inline.hpp"
|
|
|
36 #include "nativeInst_x86.hpp"
|
|
|
37 #include "os_share_bsd.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_bsd.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
|
|
|
62 // put OS-includes here
|
|
|
63 # include <sys/types.h>
|
|
|
64 # include <sys/mman.h>
|
|
|
65 # include <pthread.h>
|
|
|
66 # include <signal.h>
|
|
|
67 # include <errno.h>
|
|
|
68 # include <dlfcn.h>
|
|
|
69 # include <stdlib.h>
|
|
|
70 # include <stdio.h>
|
|
|
71 # include <unistd.h>
|
|
|
72 # include <sys/resource.h>
|
|
|
73 # include <pthread.h>
|
|
|
74 # include <sys/stat.h>
|
|
|
75 # include <sys/time.h>
|
|
|
76 # include <sys/utsname.h>
|
|
|
77 # include <sys/socket.h>
|
|
|
78 # include <sys/wait.h>
|
|
|
79 # include <pwd.h>
|
|
|
80 # include <poll.h>
|
|
|
81 #ifndef __OpenBSD__
|
|
|
82 # include <ucontext.h>
|
|
|
83 #endif
|
|
|
84
|
|
|
85 #if defined(_ALLBSD_SOURCE) && !defined(__APPLE__) && !defined(__NetBSD__)
|
|
|
86 # include <pthread_np.h>
|
|
|
87 #endif
|
|
|
88
|
|
|
89 #ifdef AMD64
|
|
|
90 #define SPELL_REG_SP "rsp"
|
|
|
91 #define SPELL_REG_FP "rbp"
|
|
|
92 #else
|
|
|
93 #define SPELL_REG_SP "esp"
|
|
|
94 #define SPELL_REG_FP "ebp"
|
|
|
95 #endif // AMD64
|
|
|
96
|
|
|
97 #ifdef __FreeBSD__
|
|
|
98 # define context_trapno uc_mcontext.mc_trapno
|
|
|
99 # ifdef AMD64
|
|
|
100 # define context_pc uc_mcontext.mc_rip
|
|
|
101 # define context_sp uc_mcontext.mc_rsp
|
|
|
102 # define context_fp uc_mcontext.mc_rbp
|
|
|
103 # define context_rip uc_mcontext.mc_rip
|
|
|
104 # define context_rsp uc_mcontext.mc_rsp
|
|
|
105 # define context_rbp uc_mcontext.mc_rbp
|
|
|
106 # define context_rax uc_mcontext.mc_rax
|
|
|
107 # define context_rbx uc_mcontext.mc_rbx
|
|
|
108 # define context_rcx uc_mcontext.mc_rcx
|
|
|
109 # define context_rdx uc_mcontext.mc_rdx
|
|
|
110 # define context_rsi uc_mcontext.mc_rsi
|
|
|
111 # define context_rdi uc_mcontext.mc_rdi
|
|
|
112 # define context_r8 uc_mcontext.mc_r8
|
|
|
113 # define context_r9 uc_mcontext.mc_r9
|
|
|
114 # define context_r10 uc_mcontext.mc_r10
|
|
|
115 # define context_r11 uc_mcontext.mc_r11
|
|
|
116 # define context_r12 uc_mcontext.mc_r12
|
|
|
117 # define context_r13 uc_mcontext.mc_r13
|
|
|
118 # define context_r14 uc_mcontext.mc_r14
|
|
|
119 # define context_r15 uc_mcontext.mc_r15
|
|
|
120 # define context_flags uc_mcontext.mc_flags
|
|
|
121 # define context_err uc_mcontext.mc_err
|
|
|
122 # else
|
|
|
123 # define context_pc uc_mcontext.mc_eip
|
|
|
124 # define context_sp uc_mcontext.mc_esp
|
|
|
125 # define context_fp uc_mcontext.mc_ebp
|
|
|
126 # define context_eip uc_mcontext.mc_eip
|
|
|
127 # define context_esp uc_mcontext.mc_esp
|
|
|
128 # define context_eax uc_mcontext.mc_eax
|
|
|
129 # define context_ebx uc_mcontext.mc_ebx
|
|
|
130 # define context_ecx uc_mcontext.mc_ecx
|
|
|
131 # define context_edx uc_mcontext.mc_edx
|
|
|
132 # define context_ebp uc_mcontext.mc_ebp
|
|
|
133 # define context_esi uc_mcontext.mc_esi
|
|
|
134 # define context_edi uc_mcontext.mc_edi
|
|
|
135 # define context_eflags uc_mcontext.mc_eflags
|
|
|
136 # define context_trapno uc_mcontext.mc_trapno
|
|
|
137 # endif
|
|
|
138 #endif
|
|
|
139
|
|
|
140 #ifdef __APPLE__
|
|
|
141 # if __DARWIN_UNIX03 && (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5)
|
|
|
142 // 10.5 UNIX03 member name prefixes
|
|
|
143 #define DU3_PREFIX(s, m) __ ## s.__ ## m
|
|
|
144 # else
|
|
|
145 #define DU3_PREFIX(s, m) s ## . ## m
|
|
|
146 # endif
|
|
|
147
|
|
|
148 # ifdef AMD64
|
|
|
149 # define context_pc context_rip
|
|
|
150 # define context_sp context_rsp
|
|
|
151 # define context_fp context_rbp
|
|
|
152 # define context_rip uc_mcontext->DU3_PREFIX(ss,rip)
|
|
|
153 # define context_rsp uc_mcontext->DU3_PREFIX(ss,rsp)
|
|
|
154 # define context_rax uc_mcontext->DU3_PREFIX(ss,rax)
|
|
|
155 # define context_rbx uc_mcontext->DU3_PREFIX(ss,rbx)
|
|
|
156 # define context_rcx uc_mcontext->DU3_PREFIX(ss,rcx)
|
|
|
157 # define context_rdx uc_mcontext->DU3_PREFIX(ss,rdx)
|
|
|
158 # define context_rbp uc_mcontext->DU3_PREFIX(ss,rbp)
|
|
|
159 # define context_rsi uc_mcontext->DU3_PREFIX(ss,rsi)
|
|
|
160 # define context_rdi uc_mcontext->DU3_PREFIX(ss,rdi)
|
|
|
161 # define context_r8 uc_mcontext->DU3_PREFIX(ss,r8)
|
|
|
162 # define context_r9 uc_mcontext->DU3_PREFIX(ss,r9)
|
|
|
163 # define context_r10 uc_mcontext->DU3_PREFIX(ss,r10)
|
|
|
164 # define context_r11 uc_mcontext->DU3_PREFIX(ss,r11)
|
|
|
165 # define context_r12 uc_mcontext->DU3_PREFIX(ss,r12)
|
|
|
166 # define context_r13 uc_mcontext->DU3_PREFIX(ss,r13)
|
|
|
167 # define context_r14 uc_mcontext->DU3_PREFIX(ss,r14)
|
|
|
168 # define context_r15 uc_mcontext->DU3_PREFIX(ss,r15)
|
|
|
169 # define context_flags uc_mcontext->DU3_PREFIX(ss,rflags)
|
|
|
170 # define context_trapno uc_mcontext->DU3_PREFIX(es,trapno)
|
|
|
171 # define context_err uc_mcontext->DU3_PREFIX(es,err)
|
|
|
172 # else
|
|
|
173 # define context_pc context_eip
|
|
|
174 # define context_sp context_esp
|
|
|
175 # define context_fp context_ebp
|
|
|
176 # define context_eip uc_mcontext->DU3_PREFIX(ss,eip)
|
|
|
177 # define context_esp uc_mcontext->DU3_PREFIX(ss,esp)
|
|
|
178 # define context_eax uc_mcontext->DU3_PREFIX(ss,eax)
|
|
|
179 # define context_ebx uc_mcontext->DU3_PREFIX(ss,ebx)
|
|
|
180 # define context_ecx uc_mcontext->DU3_PREFIX(ss,ecx)
|
|
|
181 # define context_edx uc_mcontext->DU3_PREFIX(ss,edx)
|
|
|
182 # define context_ebp uc_mcontext->DU3_PREFIX(ss,ebp)
|
|
|
183 # define context_esi uc_mcontext->DU3_PREFIX(ss,esi)
|
|
|
184 # define context_edi uc_mcontext->DU3_PREFIX(ss,edi)
|
|
|
185 # define context_eflags uc_mcontext->DU3_PREFIX(ss,eflags)
|
|
|
186 # define context_trapno uc_mcontext->DU3_PREFIX(es,trapno)
|
|
|
187 # endif
|
|
|
188 #endif
|
|
|
189
|
|
|
190 #ifdef __OpenBSD__
|
|
|
191 # define context_trapno sc_trapno
|
|
|
192 # ifdef AMD64
|
|
|
193 # define context_pc sc_rip
|
|
|
194 # define context_sp sc_rsp
|
|
|
195 # define context_fp sc_rbp
|
|
|
196 # define context_rip sc_rip
|
|
|
197 # define context_rsp sc_rsp
|
|
|
198 # define context_rbp sc_rbp
|
|
|
199 # define context_rax sc_rax
|
|
|
200 # define context_rbx sc_rbx
|
|
|
201 # define context_rcx sc_rcx
|
|
|
202 # define context_rdx sc_rdx
|
|
|
203 # define context_rsi sc_rsi
|
|
|
204 # define context_rdi sc_rdi
|
|
|
205 # define context_r8 sc_r8
|
|
|
206 # define context_r9 sc_r9
|
|
|
207 # define context_r10 sc_r10
|
|
|
208 # define context_r11 sc_r11
|
|
|
209 # define context_r12 sc_r12
|
|
|
210 # define context_r13 sc_r13
|
|
|
211 # define context_r14 sc_r14
|
|
|
212 # define context_r15 sc_r15
|
|
|
213 # define context_flags sc_rflags
|
|
|
214 # define context_err sc_err
|
|
|
215 # else
|
|
|
216 # define context_pc sc_eip
|
|
|
217 # define context_sp sc_esp
|
|
|
218 # define context_fp sc_ebp
|
|
|
219 # define context_eip sc_eip
|
|
|
220 # define context_esp sc_esp
|
|
|
221 # define context_eax sc_eax
|
|
|
222 # define context_ebx sc_ebx
|
|
|
223 # define context_ecx sc_ecx
|
|
|
224 # define context_edx sc_edx
|
|
|
225 # define context_ebp sc_ebp
|
|
|
226 # define context_esi sc_esi
|
|
|
227 # define context_edi sc_edi
|
|
|
228 # define context_eflags sc_eflags
|
|
|
229 # define context_trapno sc_trapno
|
|
|
230 # endif
|
|
|
231 #endif
|
|
|
232
|
|
|
233 #ifdef __NetBSD__
|
|
|
234 # define context_trapno uc_mcontext.__gregs[_REG_TRAPNO]
|
|
|
235 # ifdef AMD64
|
|
|
236 # define __register_t __greg_t
|
|
|
237 # define context_pc uc_mcontext.__gregs[_REG_RIP]
|
|
|
238 # define context_sp uc_mcontext.__gregs[_REG_URSP]
|
|
|
239 # define context_fp uc_mcontext.__gregs[_REG_RBP]
|
|
|
240 # define context_rip uc_mcontext.__gregs[_REG_RIP]
|
|
|
241 # define context_rsp uc_mcontext.__gregs[_REG_URSP]
|
|
|
242 # define context_rax uc_mcontext.__gregs[_REG_RAX]
|
|
|
243 # define context_rbx uc_mcontext.__gregs[_REG_RBX]
|
|
|
244 # define context_rcx uc_mcontext.__gregs[_REG_RCX]
|
|
|
245 # define context_rdx uc_mcontext.__gregs[_REG_RDX]
|
|
|
246 # define context_rbp uc_mcontext.__gregs[_REG_RBP]
|
|
|
247 # define context_rsi uc_mcontext.__gregs[_REG_RSI]
|
|
|
248 # define context_rdi uc_mcontext.__gregs[_REG_RDI]
|
|
|
249 # define context_r8 uc_mcontext.__gregs[_REG_R8]
|
|
|
250 # define context_r9 uc_mcontext.__gregs[_REG_R9]
|
|
|
251 # define context_r10 uc_mcontext.__gregs[_REG_R10]
|
|
|
252 # define context_r11 uc_mcontext.__gregs[_REG_R11]
|
|
|
253 # define context_r12 uc_mcontext.__gregs[_REG_R12]
|
|
|
254 # define context_r13 uc_mcontext.__gregs[_REG_R13]
|
|
|
255 # define context_r14 uc_mcontext.__gregs[_REG_R14]
|
|
|
256 # define context_r15 uc_mcontext.__gregs[_REG_R15]
|
|
|
257 # define context_flags uc_mcontext.__gregs[_REG_RFL]
|
|
|
258 # define context_err uc_mcontext.__gregs[_REG_ERR]
|
|
|
259 # else
|
|
|
260 # define context_pc uc_mcontext.__gregs[_REG_EIP]
|
|
|
261 # define context_sp uc_mcontext.__gregs[_REG_UESP]
|
|
|
262 # define context_fp uc_mcontext.__gregs[_REG_EBP]
|
|
|
263 # define context_eip uc_mcontext.__gregs[_REG_EIP]
|
|
|
264 # define context_esp uc_mcontext.__gregs[_REG_UESP]
|
|
|
265 # define context_eax uc_mcontext.__gregs[_REG_EAX]
|
|
|
266 # define context_ebx uc_mcontext.__gregs[_REG_EBX]
|
|
|
267 # define context_ecx uc_mcontext.__gregs[_REG_ECX]
|
|
|
268 # define context_edx uc_mcontext.__gregs[_REG_EDX]
|
|
|
269 # define context_ebp uc_mcontext.__gregs[_REG_EBP]
|
|
|
270 # define context_esi uc_mcontext.__gregs[_REG_ESI]
|
|
|
271 # define context_edi uc_mcontext.__gregs[_REG_EDI]
|
|
|
272 # define context_eflags uc_mcontext.__gregs[_REG_EFL]
|
|
|
273 # define context_trapno uc_mcontext.__gregs[_REG_TRAPNO]
|
|
|
274 # endif
|
|
|
275 #endif
|
|
|
276
|
|
|
277 address os::current_stack_pointer() {
|
|
4006
|
278 #if defined(__clang__) || defined(__llvm__)
|
|
|
279 register void *esp;
|
|
|
280 __asm__("mov %%"SPELL_REG_SP", %0":"=r"(esp));
|
|
|
281 return (address) esp;
|
|
|
282 #elif defined(SPARC_WORKS)
|
|
3960
|
283 register void *esp;
|
|
|
284 __asm__("mov %%"SPELL_REG_SP", %0":"=r"(esp));
|
|
|
285 return (address) ((char*)esp + sizeof(long)*2);
|
|
|
286 #else
|
|
|
287 register void *esp __asm__ (SPELL_REG_SP);
|
|
|
288 return (address) esp;
|
|
|
289 #endif
|
|
|
290 }
|
|
|
291
|
|
|
292 char* os::non_memory_address_word() {
|
|
|
293 // Must never look like an address returned by reserve_memory,
|
|
|
294 // even in its subfields (as defined by the CPU immediate fields,
|
|
|
295 // if the CPU splits constants across multiple instructions).
|
|
|
296
|
|
|
297 return (char*) -1;
|
|
|
298 }
|
|
|
299
|
|
|
300 void os::initialize_thread() {
|
|
|
301 // Nothing to do.
|
|
|
302 }
|
|
|
303
|
|
|
304 address os::Bsd::ucontext_get_pc(ucontext_t * uc) {
|
|
|
305 return (address)uc->context_pc;
|
|
|
306 }
|
|
|
307
|
|
|
308 intptr_t* os::Bsd::ucontext_get_sp(ucontext_t * uc) {
|
|
|
309 return (intptr_t*)uc->context_sp;
|
|
|
310 }
|
|
|
311
|
|
|
312 intptr_t* os::Bsd::ucontext_get_fp(ucontext_t * uc) {
|
|
|
313 return (intptr_t*)uc->context_fp;
|
|
|
314 }
|
|
|
315
|
|
|
316 // For Forte Analyzer AsyncGetCallTrace profiling support - thread
|
|
|
317 // is currently interrupted by SIGPROF.
|
|
|
318 // os::Solaris::fetch_frame_from_ucontext() tries to skip nested signal
|
|
|
319 // frames. Currently we don't do that on Bsd, so it's the same as
|
|
|
320 // os::fetch_frame_from_context().
|
|
|
321 ExtendedPC os::Bsd::fetch_frame_from_ucontext(Thread* thread,
|
|
|
322 ucontext_t* uc, intptr_t** ret_sp, intptr_t** ret_fp) {
|
|
|
323
|
|
|
324 assert(thread != NULL, "just checking");
|
|
|
325 assert(ret_sp != NULL, "just checking");
|
|
|
326 assert(ret_fp != NULL, "just checking");
|
|
|
327
|
|
|
328 return os::fetch_frame_from_context(uc, ret_sp, ret_fp);
|
|
|
329 }
|
|
|
330
|
|
|
331 ExtendedPC os::fetch_frame_from_context(void* ucVoid,
|
|
|
332 intptr_t** ret_sp, intptr_t** ret_fp) {
|
|
|
333
|
|
|
334 ExtendedPC epc;
|
|
|
335 ucontext_t* uc = (ucontext_t*)ucVoid;
|
|
|
336
|
|
|
337 if (uc != NULL) {
|
|
|
338 epc = ExtendedPC(os::Bsd::ucontext_get_pc(uc));
|
|
|
339 if (ret_sp) *ret_sp = os::Bsd::ucontext_get_sp(uc);
|
|
|
340 if (ret_fp) *ret_fp = os::Bsd::ucontext_get_fp(uc);
|
|
|
341 } else {
|
|
|
342 // construct empty ExtendedPC for return value checking
|
|
|
343 epc = ExtendedPC(NULL);
|
|
|
344 if (ret_sp) *ret_sp = (intptr_t *)NULL;
|
|
|
345 if (ret_fp) *ret_fp = (intptr_t *)NULL;
|
|
|
346 }
|
|
|
347
|
|
|
348 return epc;
|
|
|
349 }
|
|
|
350
|
|
|
351 frame os::fetch_frame_from_context(void* ucVoid) {
|
|
|
352 intptr_t* sp;
|
|
|
353 intptr_t* fp;
|
|
|
354 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp);
|
|
|
355 return frame(sp, fp, epc.pc());
|
|
|
356 }
|
|
|
357
|
|
|
358 // By default, gcc always save frame pointer (%ebp/%rbp) on stack. It may get
|
|
|
359 // turned off by -fomit-frame-pointer,
|
|
|
360 frame os::get_sender_for_C_frame(frame* fr) {
|
|
|
361 return frame(fr->sender_sp(), fr->link(), fr->sender_pc());
|
|
|
362 }
|
|
|
363
|
|
|
364 intptr_t* _get_previous_fp() {
|
|
4006
|
365 #if defined(SPARC_WORKS) || defined(__clang__)
|
|
3960
|
366 register intptr_t **ebp;
|
|
|
367 __asm__("mov %%"SPELL_REG_FP", %0":"=r"(ebp));
|
|
|
368 #else
|
|
|
369 register intptr_t **ebp __asm__ (SPELL_REG_FP);
|
|
|
370 #endif
|
|
|
371 return (intptr_t*) *ebp; // we want what it points to.
|
|
|
372 }
|
|
|
373
|
|
|
374
|
|
|
375 frame os::current_frame() {
|
|
|
376 intptr_t* fp = _get_previous_fp();
|
|
|
377 frame myframe((intptr_t*)os::current_stack_pointer(),
|
|
|
378 (intptr_t*)fp,
|
|
|
379 CAST_FROM_FN_PTR(address, os::current_frame));
|
|
|
380 if (os::is_first_C_frame(&myframe)) {
|
|
|
381 // stack is not walkable
|
|
|
382 return frame(NULL, NULL, NULL);
|
|
|
383 } else {
|
|
|
384 return os::get_sender_for_C_frame(&myframe);
|
|
|
385 }
|
|
|
386 }
|
|
|
387
|
|
|
388 // Utility functions
|
|
|
389
|
|
|
390 // From IA32 System Programming Guide
|
|
|
391 enum {
|
|
|
392 trap_page_fault = 0xE
|
|
|
393 };
|
|
|
394
|
|
|
395 extern "C" void Fetch32PFI () ;
|
|
|
396 extern "C" void Fetch32Resume () ;
|
|
|
397 #ifdef AMD64
|
|
|
398 extern "C" void FetchNPFI () ;
|
|
|
399 extern "C" void FetchNResume () ;
|
|
|
400 #endif // AMD64
|
|
|
401
|
|
|
402 extern "C" JNIEXPORT int
|
|
|
403 JVM_handle_bsd_signal(int sig,
|
|
|
404 siginfo_t* info,
|
|
|
405 void* ucVoid,
|
|
|
406 int abort_if_unrecognized) {
|
|
|
407 ucontext_t* uc = (ucontext_t*) ucVoid;
|
|
|
408
|
|
|
409 Thread* t = ThreadLocalStorage::get_thread_slow();
|
|
|
410
|
|
|
411 SignalHandlerMark shm(t);
|
|
|
412
|
|
|
413 // Note: it's not uncommon that JNI code uses signal/sigset to install
|
|
|
414 // then restore certain signal handler (e.g. to temporarily block SIGPIPE,
|
|
|
415 // or have a SIGILL handler when detecting CPU type). When that happens,
|
|
|
416 // JVM_handle_bsd_signal() might be invoked with junk info/ucVoid. To
|
|
|
417 // avoid unnecessary crash when libjsig is not preloaded, try handle signals
|
|
|
418 // that do not require siginfo/ucontext first.
|
|
|
419
|
|
|
420 if (sig == SIGPIPE || sig == SIGXFSZ) {
|
|
|
421 // allow chained handler to go first
|
|
|
422 if (os::Bsd::chained_handler(sig, info, ucVoid)) {
|
|
|
423 return true;
|
|
|
424 } else {
|
|
|
425 if (PrintMiscellaneous && (WizardMode || Verbose)) {
|
|
|
426 char buf[64];
|
|
|
427 warning("Ignoring %s - see bugs 4229104 or 646499219",
|
|
|
428 os::exception_name(sig, buf, sizeof(buf)));
|
|
|
429 }
|
|
|
430 return true;
|
|
|
431 }
|
|
|
432 }
|
|
|
433
|
|
|
434 JavaThread* thread = NULL;
|
|
|
435 VMThread* vmthread = NULL;
|
|
|
436 if (os::Bsd::signal_handlers_are_installed) {
|
|
|
437 if (t != NULL ){
|
|
|
438 if(t->is_Java_thread()) {
|
|
|
439 thread = (JavaThread*)t;
|
|
|
440 }
|
|
|
441 else if(t->is_VM_thread()){
|
|
|
442 vmthread = (VMThread *)t;
|
|
|
443 }
|
|
|
444 }
|
|
|
445 }
|
|
|
446 /*
|
|
|
447 NOTE: does not seem to work on bsd.
|
|
|
448 if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) {
|
|
|
449 // can't decode this kind of signal
|
|
|
450 info = NULL;
|
|
|
451 } else {
|
|
|
452 assert(sig == info->si_signo, "bad siginfo");
|
|
|
453 }
|
|
|
454 */
|
|
|
455 // decide if this trap can be handled by a stub
|
|
|
456 address stub = NULL;
|
|
|
457
|
|
|
458 address pc = NULL;
|
|
|
459
|
|
|
460 //%note os_trap_1
|
|
|
461 if (info != NULL && uc != NULL && thread != NULL) {
|
|
|
462 pc = (address) os::Bsd::ucontext_get_pc(uc);
|
|
|
463
|
|
|
464 if (pc == (address) Fetch32PFI) {
|
|
|
465 uc->context_pc = intptr_t(Fetch32Resume) ;
|
|
|
466 return 1 ;
|
|
|
467 }
|
|
|
468 #ifdef AMD64
|
|
|
469 if (pc == (address) FetchNPFI) {
|
|
|
470 uc->context_pc = intptr_t (FetchNResume) ;
|
|
|
471 return 1 ;
|
|
|
472 }
|
|
|
473 #endif // AMD64
|
|
|
474
|
|
|
475 // Handle ALL stack overflow variations here
|
|
|
476 if (sig == SIGSEGV || sig == SIGBUS) {
|
|
|
477 address addr = (address) info->si_addr;
|
|
|
478
|
|
|
479 // check if fault address is within thread stack
|
|
|
480 if (addr < thread->stack_base() &&
|
|
|
481 addr >= thread->stack_base() - thread->stack_size()) {
|
|
|
482 // stack overflow
|
|
|
483 if (thread->in_stack_yellow_zone(addr)) {
|
|
|
484 thread->disable_stack_yellow_zone();
|
|
|
485 if (thread->thread_state() == _thread_in_Java) {
|
|
|
486 // Throw a stack overflow exception. Guard pages will be reenabled
|
|
|
487 // while unwinding the stack.
|
|
|
488 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW);
|
|
|
489 } else {
|
|
|
490 // Thread was in the vm or native code. Return and try to finish.
|
|
|
491 return 1;
|
|
|
492 }
|
|
|
493 } else if (thread->in_stack_red_zone(addr)) {
|
|
|
494 // Fatal red zone violation. Disable the guard pages and fall through
|
|
|
495 // to handle_unexpected_exception way down below.
|
|
|
496 thread->disable_stack_red_zone();
|
|
|
497 tty->print_raw_cr("An irrecoverable stack overflow has occurred.");
|
|
|
498 #ifndef _ALLBSD_SOURCE
|
|
|
499 } else {
|
|
|
500 // Accessing stack address below sp may cause SEGV if current
|
|
|
501 // thread has MAP_GROWSDOWN stack. This should only happen when
|
|
|
502 // current thread was created by user code with MAP_GROWSDOWN flag
|
|
|
503 // and then attached to VM. See notes in os_bsd.cpp.
|
|
|
504 if (thread->osthread()->expanding_stack() == 0) {
|
|
|
505 thread->osthread()->set_expanding_stack();
|
|
|
506 if (os::Bsd::manually_expand_stack(thread, addr)) {
|
|
|
507 thread->osthread()->clear_expanding_stack();
|
|
|
508 return 1;
|
|
|
509 }
|
|
|
510 thread->osthread()->clear_expanding_stack();
|
|
|
511 } else {
|
|
|
512 fatal("recursive segv. expanding stack.");
|
|
|
513 }
|
|
|
514 #endif
|
|
|
515 }
|
|
|
516 }
|
|
|
517 }
|
|
|
518
|
|
|
519 if (thread->thread_state() == _thread_in_Java) {
|
|
|
520 // Java thread running in Java code => find exception handler if any
|
|
|
521 // a fault inside compiled code, the interpreter, or a stub
|
|
|
522
|
|
|
523 if ((sig == SIGSEGV || sig == SIGBUS) && os::is_poll_address((address)info->si_addr)) {
|
|
|
524 stub = SharedRuntime::get_poll_stub(pc);
|
|
|
525 #if defined(__APPLE__) && !defined(AMD64)
|
|
|
526 // 32-bit Darwin reports a SIGBUS for nearly all memory access exceptions.
|
|
|
527 // Catching SIGBUS here prevents the implicit SIGBUS NULL check below from
|
|
|
528 // being called, so only do so if the implicit NULL check is not necessary.
|
|
|
529 } else if (sig == SIGBUS && MacroAssembler::needs_explicit_null_check((int)info->si_addr)) {
|
|
|
530 #else
|
|
|
531 } else if (sig == SIGBUS /* && info->si_code == BUS_OBJERR */) {
|
|
|
532 #endif
|
|
|
533 // BugId 4454115: A read from a MappedByteBuffer can fault
|
|
|
534 // here if the underlying file has been truncated.
|
|
|
535 // Do not crash the VM in such a case.
|
|
|
536 CodeBlob* cb = CodeCache::find_blob_unsafe(pc);
|
|
|
537 nmethod* nm = cb->is_nmethod() ? (nmethod*)cb : NULL;
|
|
|
538 if (nm != NULL && nm->has_unsafe_access()) {
|
|
|
539 stub = StubRoutines::handler_for_unsafe_access();
|
|
|
540 }
|
|
|
541 }
|
|
|
542 else
|
|
|
543
|
|
|
544 #ifdef AMD64
|
|
|
545 if (sig == SIGFPE &&
|
|
|
546 (info->si_code == FPE_INTDIV || info->si_code == FPE_FLTDIV)) {
|
|
|
547 stub =
|
|
|
548 SharedRuntime::
|
|
|
549 continuation_for_implicit_exception(thread,
|
|
|
550 pc,
|
|
|
551 SharedRuntime::
|
|
|
552 IMPLICIT_DIVIDE_BY_ZERO);
|
|
|
553 #ifdef __APPLE__
|
|
|
554 } else if (sig == SIGFPE && info->si_code == FPE_NOOP) {
|
|
|
555 int op = pc[0];
|
|
|
556
|
|
|
557 // Skip REX
|
|
|
558 if ((pc[0] & 0xf0) == 0x40) {
|
|
|
559 op = pc[1];
|
|
|
560 } else {
|
|
|
561 op = pc[0];
|
|
|
562 }
|
|
|
563
|
|
|
564 // Check for IDIV
|
|
|
565 if (op == 0xF7) {
|
|
|
566 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime:: IMPLICIT_DIVIDE_BY_ZERO);
|
|
|
567 } else {
|
|
|
568 // TODO: handle more cases if we are using other x86 instructions
|
|
|
569 // that can generate SIGFPE signal.
|
|
|
570 tty->print_cr("unknown opcode 0x%X with SIGFPE.", op);
|
|
|
571 fatal("please update this code.");
|
|
|
572 }
|
|
|
573 #endif /* __APPLE__ */
|
|
|
574
|
|
|
575 #else
|
|
|
576 if (sig == SIGFPE /* && info->si_code == FPE_INTDIV */) {
|
|
|
577 // HACK: si_code does not work on bsd 2.2.12-20!!!
|
|
|
578 int op = pc[0];
|
|
|
579 if (op == 0xDB) {
|
|
|
580 // FIST
|
|
|
581 // TODO: The encoding of D2I in i486.ad can cause an exception
|
|
|
582 // prior to the fist instruction if there was an invalid operation
|
|
|
583 // pending. We want to dismiss that exception. From the win_32
|
|
|
584 // side it also seems that if it really was the fist causing
|
|
|
585 // the exception that we do the d2i by hand with different
|
|
|
586 // rounding. Seems kind of weird.
|
|
|
587 // NOTE: that we take the exception at the NEXT floating point instruction.
|
|
|
588 assert(pc[0] == 0xDB, "not a FIST opcode");
|
|
|
589 assert(pc[1] == 0x14, "not a FIST opcode");
|
|
|
590 assert(pc[2] == 0x24, "not a FIST opcode");
|
|
|
591 return true;
|
|
|
592 } else if (op == 0xF7) {
|
|
|
593 // IDIV
|
|
|
594 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO);
|
|
|
595 } else {
|
|
|
596 // TODO: handle more cases if we are using other x86 instructions
|
|
|
597 // that can generate SIGFPE signal on bsd.
|
|
|
598 tty->print_cr("unknown opcode 0x%X with SIGFPE.", op);
|
|
|
599 fatal("please update this code.");
|
|
|
600 }
|
|
|
601 #endif // AMD64
|
|
|
602 } else if ((sig == SIGSEGV || sig == SIGBUS) &&
|
|
|
603 !MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) {
|
|
|
604 // Determination of interpreter/vtable stub/compiled code null exception
|
|
|
605 stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL);
|
|
|
606 }
|
|
|
607 } else if (thread->thread_state() == _thread_in_vm &&
|
|
|
608 sig == SIGBUS && /* info->si_code == BUS_OBJERR && */
|
|
|
609 thread->doing_unsafe_access()) {
|
|
|
610 stub = StubRoutines::handler_for_unsafe_access();
|
|
|
611 }
|
|
|
612
|
|
|
613 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in
|
|
|
614 // and the heap gets shrunk before the field access.
|
|
|
615 if ((sig == SIGSEGV) || (sig == SIGBUS)) {
|
|
|
616 address addr = JNI_FastGetField::find_slowcase_pc(pc);
|
|
|
617 if (addr != (address)-1) {
|
|
|
618 stub = addr;
|
|
|
619 }
|
|
|
620 }
|
|
|
621
|
|
|
622 // Check to see if we caught the safepoint code in the
|
|
|
623 // process of write protecting the memory serialization page.
|
|
|
624 // It write enables the page immediately after protecting it
|
|
|
625 // so we can just return to retry the write.
|
|
|
626 if ((sig == SIGSEGV || sig == SIGBUS) &&
|
|
|
627 os::is_memory_serialize_page(thread, (address) info->si_addr)) {
|
|
|
628 // Block current thread until the memory serialize page permission restored.
|
|
|
629 os::block_on_serialize_page_trap();
|
|
|
630 return true;
|
|
|
631 }
|
|
|
632 }
|
|
|
633
|
|
|
634 #ifndef AMD64
|
|
|
635 // Execution protection violation
|
|
|
636 //
|
|
|
637 // This should be kept as the last step in the triage. We don't
|
|
|
638 // have a dedicated trap number for a no-execute fault, so be
|
|
|
639 // conservative and allow other handlers the first shot.
|
|
|
640 //
|
|
|
641 // Note: We don't test that info->si_code == SEGV_ACCERR here.
|
|
|
642 // this si_code is so generic that it is almost meaningless; and
|
|
|
643 // the si_code for this condition may change in the future.
|
|
|
644 // Furthermore, a false-positive should be harmless.
|
|
|
645 if (UnguardOnExecutionViolation > 0 &&
|
|
|
646 (sig == SIGSEGV || sig == SIGBUS) &&
|
|
|
647 uc->context_trapno == trap_page_fault) {
|
|
|
648 int page_size = os::vm_page_size();
|
|
|
649 address addr = (address) info->si_addr;
|
|
|
650 address pc = os::Bsd::ucontext_get_pc(uc);
|
|
|
651 // Make sure the pc and the faulting address are sane.
|
|
|
652 //
|
|
|
653 // If an instruction spans a page boundary, and the page containing
|
|
|
654 // the beginning of the instruction is executable but the following
|
|
|
655 // page is not, the pc and the faulting address might be slightly
|
|
|
656 // different - we still want to unguard the 2nd page in this case.
|
|
|
657 //
|
|
|
658 // 15 bytes seems to be a (very) safe value for max instruction size.
|
|
|
659 bool pc_is_near_addr =
|
|
|
660 (pointer_delta((void*) addr, (void*) pc, sizeof(char)) < 15);
|
|
|
661 bool instr_spans_page_boundary =
|
|
|
662 (align_size_down((intptr_t) pc ^ (intptr_t) addr,
|
|
|
663 (intptr_t) page_size) > 0);
|
|
|
664
|
|
|
665 if (pc == addr || (pc_is_near_addr && instr_spans_page_boundary)) {
|
|
|
666 static volatile address last_addr =
|
|
|
667 (address) os::non_memory_address_word();
|
|
|
668
|
|
|
669 // In conservative mode, don't unguard unless the address is in the VM
|
|
|
670 if (addr != last_addr &&
|
|
|
671 (UnguardOnExecutionViolation > 1 || os::address_is_in_vm(addr))) {
|
|
|
672
|
|
|
673 // Set memory to RWX and retry
|
|
|
674 address page_start =
|
|
|
675 (address) align_size_down((intptr_t) addr, (intptr_t) page_size);
|
|
|
676 bool res = os::protect_memory((char*) page_start, page_size,
|
|
|
677 os::MEM_PROT_RWX);
|
|
|
678
|
|
|
679 if (PrintMiscellaneous && Verbose) {
|
|
|
680 char buf[256];
|
|
|
681 jio_snprintf(buf, sizeof(buf), "Execution protection violation "
|
|
|
682 "at " INTPTR_FORMAT
|
|
|
683 ", unguarding " INTPTR_FORMAT ": %s, errno=%d", addr,
|
|
|
684 page_start, (res ? "success" : "failed"), errno);
|
|
|
685 tty->print_raw_cr(buf);
|
|
|
686 }
|
|
|
687 stub = pc;
|
|
|
688
|
|
|
689 // Set last_addr so if we fault again at the same address, we don't end
|
|
|
690 // up in an endless loop.
|
|
|
691 //
|
|
|
692 // There are two potential complications here. Two threads trapping at
|
|
|
693 // the same address at the same time could cause one of the threads to
|
|
|
694 // think it already unguarded, and abort the VM. Likely very rare.
|
|
|
695 //
|
|
|
696 // The other race involves two threads alternately trapping at
|
|
|
697 // different addresses and failing to unguard the page, resulting in
|
|
|
698 // an endless loop. This condition is probably even more unlikely than
|
|
|
699 // the first.
|
|
|
700 //
|
|
|
701 // Although both cases could be avoided by using locks or thread local
|
|
|
702 // last_addr, these solutions are unnecessary complication: this
|
|
|
703 // handler is a best-effort safety net, not a complete solution. It is
|
|
|
704 // disabled by default and should only be used as a workaround in case
|
|
|
705 // we missed any no-execute-unsafe VM code.
|
|
|
706
|
|
|
707 last_addr = addr;
|
|
|
708 }
|
|
|
709 }
|
|
|
710 }
|
|
|
711 #endif // !AMD64
|
|
|
712
|
|
|
713 if (stub != NULL) {
|
|
|
714 // save all thread context in case we need to restore it
|
|
|
715 if (thread != NULL) thread->set_saved_exception_pc(pc);
|
|
|
716
|
|
|
717 uc->context_pc = (intptr_t)stub;
|
|
|
718 return true;
|
|
|
719 }
|
|
|
720
|
|
|
721 // signal-chaining
|
|
|
722 if (os::Bsd::chained_handler(sig, info, ucVoid)) {
|
|
|
723 return true;
|
|
|
724 }
|
|
|
725
|
|
|
726 if (!abort_if_unrecognized) {
|
|
|
727 // caller wants another chance, so give it to him
|
|
|
728 return false;
|
|
|
729 }
|
|
|
730
|
|
|
731 if (pc == NULL && uc != NULL) {
|
|
|
732 pc = os::Bsd::ucontext_get_pc(uc);
|
|
|
733 }
|
|
|
734
|
|
|
735 // unmask current signal
|
|
|
736 sigset_t newset;
|
|
|
737 sigemptyset(&newset);
|
|
|
738 sigaddset(&newset, sig);
|
|
|
739 sigprocmask(SIG_UNBLOCK, &newset, NULL);
|
|
|
740
|
|
|
741 VMError err(t, sig, pc, info, ucVoid);
|
|
|
742 err.report_and_die();
|
|
|
743
|
|
|
744 ShouldNotReachHere();
|
|
|
745 }
|
|
|
746
|
|
|
747 #ifdef _ALLBSD_SOURCE
|
|
|
748 // From solaris_i486.s ported to bsd_i486.s
|
|
|
749 extern "C" void fixcw();
|
|
|
750 #endif
|
|
|
751
|
|
|
752 void os::Bsd::init_thread_fpu_state(void) {
|
|
|
753 #ifndef AMD64
|
|
|
754 # ifdef _ALLBSD_SOURCE
|
|
|
755 // Set fpu to 53 bit precision. This happens too early to use a stub.
|
|
|
756 fixcw();
|
|
|
757 # else
|
|
|
758 // set fpu to 53 bit precision
|
|
|
759 set_fpu_control_word(0x27f);
|
|
|
760 # endif
|
|
|
761 #endif // !AMD64
|
|
|
762 }
|
|
|
763
|
|
|
764 #ifndef _ALLBSD_SOURCE
|
|
|
765 int os::Bsd::get_fpu_control_word(void) {
|
|
|
766 #ifdef AMD64
|
|
|
767 return 0;
|
|
|
768 #else
|
|
|
769 int fpu_control;
|
|
|
770 _FPU_GETCW(fpu_control);
|
|
|
771 return fpu_control & 0xffff;
|
|
|
772 #endif // AMD64
|
|
|
773 }
|
|
|
774
|
|
|
775 void os::Bsd::set_fpu_control_word(int fpu_control) {
|
|
|
776 #ifndef AMD64
|
|
|
777 _FPU_SETCW(fpu_control);
|
|
|
778 #endif // !AMD64
|
|
|
779 }
|
|
|
780 #endif
|
|
|
781
|
|
|
782 // Check that the bsd kernel version is 2.4 or higher since earlier
|
|
|
783 // versions do not support SSE without patches.
|
|
|
784 bool os::supports_sse() {
|
|
|
785 #if defined(AMD64) || defined(_ALLBSD_SOURCE)
|
|
|
786 return true;
|
|
|
787 #else
|
|
|
788 struct utsname uts;
|
|
|
789 if( uname(&uts) != 0 ) return false; // uname fails?
|
|
|
790 char *minor_string;
|
|
|
791 int major = strtol(uts.release,&minor_string,10);
|
|
|
792 int minor = strtol(minor_string+1,NULL,10);
|
|
|
793 bool result = (major > 2 || (major==2 && minor >= 4));
|
|
|
794 #ifndef PRODUCT
|
|
|
795 if (PrintMiscellaneous && Verbose) {
|
|
|
796 tty->print("OS version is %d.%d, which %s support SSE/SSE2\n",
|
|
|
797 major,minor, result ? "DOES" : "does NOT");
|
|
|
798 }
|
|
|
799 #endif
|
|
|
800 return result;
|
|
|
801 #endif // AMD64
|
|
|
802 }
|
|
|
803
|
|
|
804 bool os::is_allocatable(size_t bytes) {
|
|
|
805 #ifdef AMD64
|
|
|
806 // unused on amd64?
|
|
|
807 return true;
|
|
|
808 #else
|
|
|
809
|
|
|
810 if (bytes < 2 * G) {
|
|
|
811 return true;
|
|
|
812 }
|
|
|
813
|
|
|
814 char* addr = reserve_memory(bytes, NULL);
|
|
|
815
|
|
|
816 if (addr != NULL) {
|
|
|
817 release_memory(addr, bytes);
|
|
|
818 }
|
|
|
819
|
|
|
820 return addr != NULL;
|
|
|
821 #endif // AMD64
|
|
|
822 }
|
|
|
823
|
|
|
824 ////////////////////////////////////////////////////////////////////////////////
|
|
|
825 // thread stack
|
|
|
826
|
|
|
827 #ifdef AMD64
|
|
|
828 size_t os::Bsd::min_stack_allowed = 64 * K;
|
|
|
829
|
|
|
830 // amd64: pthread on amd64 is always in floating stack mode
|
|
|
831 bool os::Bsd::supports_variable_stack_size() { return true; }
|
|
|
832 #else
|
|
|
833 size_t os::Bsd::min_stack_allowed = (48 DEBUG_ONLY(+4))*K;
|
|
|
834
|
|
|
835 #ifdef __GNUC__
|
|
|
836 #define GET_GS() ({int gs; __asm__ volatile("movw %%gs, %w0":"=q"(gs)); gs&0xffff;})
|
|
|
837 #endif
|
|
|
838
|
|
|
839 #ifdef _ALLBSD_SOURCE
|
|
|
840 bool os::Bsd::supports_variable_stack_size() { return true; }
|
|
|
841 #else
|
|
|
842 // Test if pthread library can support variable thread stack size. BsdThreads
|
|
|
843 // in fixed stack mode allocates 2M fixed slot for each thread. BsdThreads
|
|
|
844 // in floating stack mode and NPTL support variable stack size.
|
|
|
845 bool os::Bsd::supports_variable_stack_size() {
|
|
|
846 if (os::Bsd::is_NPTL()) {
|
|
|
847 // NPTL, yes
|
|
|
848 return true;
|
|
|
849
|
|
|
850 } else {
|
|
|
851 // Note: We can't control default stack size when creating a thread.
|
|
|
852 // If we use non-default stack size (pthread_attr_setstacksize), both
|
|
|
853 // floating stack and non-floating stack BsdThreads will return the
|
|
|
854 // same value. This makes it impossible to implement this function by
|
|
|
855 // detecting thread stack size directly.
|
|
|
856 //
|
|
|
857 // An alternative approach is to check %gs. Fixed-stack BsdThreads
|
|
|
858 // do not use %gs, so its value is 0. Floating-stack BsdThreads use
|
|
|
859 // %gs (either as LDT selector or GDT selector, depending on kernel)
|
|
|
860 // to access thread specific data.
|
|
|
861 //
|
|
|
862 // Note that %gs is a reserved glibc register since early 2001, so
|
|
|
863 // applications are not allowed to change its value (Ulrich Drepper from
|
|
|
864 // Redhat confirmed that all known offenders have been modified to use
|
|
|
865 // either %fs or TSD). In the worst case scenario, when VM is embedded in
|
|
|
866 // a native application that plays with %gs, we might see non-zero %gs
|
|
|
867 // even BsdThreads is running in fixed stack mode. As the result, we'll
|
|
|
868 // return true and skip _thread_safety_check(), so we may not be able to
|
|
|
869 // detect stack-heap collisions. But otherwise it's harmless.
|
|
|
870 //
|
|
|
871 #ifdef __GNUC__
|
|
|
872 return (GET_GS() != 0);
|
|
|
873 #else
|
|
|
874 return false;
|
|
|
875 #endif
|
|
|
876 }
|
|
|
877 }
|
|
|
878 #endif
|
|
|
879 #endif // AMD64
|
|
|
880
|
|
|
881 // return default stack size for thr_type
|
|
|
882 size_t os::Bsd::default_stack_size(os::ThreadType thr_type) {
|
|
|
883 // default stack size (compiler thread needs larger stack)
|
|
|
884 #ifdef AMD64
|
|
|
885 size_t s = (thr_type == os::compiler_thread ? 4 * M : 1 * M);
|
|
|
886 #else
|
|
|
887 size_t s = (thr_type == os::compiler_thread ? 2 * M : 512 * K);
|
|
|
888 #endif // AMD64
|
|
|
889 return s;
|
|
|
890 }
|
|
|
891
|
|
|
892 size_t os::Bsd::default_guard_size(os::ThreadType thr_type) {
|
|
|
893 // Creating guard page is very expensive. Java thread has HotSpot
|
|
|
894 // guard page, only enable glibc guard page for non-Java threads.
|
|
|
895 return (thr_type == java_thread ? 0 : page_size());
|
|
|
896 }
|
|
|
897
|
|
|
898 // Java thread:
|
|
|
899 //
|
|
|
900 // Low memory addresses
|
|
|
901 // +------------------------+
|
|
|
902 // | |\ JavaThread created by VM does not have glibc
|
|
|
903 // | glibc guard page | - guard, attached Java thread usually has
|
|
|
904 // | |/ 1 page glibc guard.
|
|
|
905 // P1 +------------------------+ Thread::stack_base() - Thread::stack_size()
|
|
|
906 // | |\
|
|
|
907 // | HotSpot Guard Pages | - red and yellow pages
|
|
|
908 // | |/
|
|
|
909 // +------------------------+ JavaThread::stack_yellow_zone_base()
|
|
|
910 // | |\
|
|
|
911 // | Normal Stack | -
|
|
|
912 // | |/
|
|
|
913 // P2 +------------------------+ Thread::stack_base()
|
|
|
914 //
|
|
|
915 // Non-Java thread:
|
|
|
916 //
|
|
|
917 // Low memory addresses
|
|
|
918 // +------------------------+
|
|
|
919 // | |\
|
|
|
920 // | glibc guard page | - usually 1 page
|
|
|
921 // | |/
|
|
|
922 // P1 +------------------------+ Thread::stack_base() - Thread::stack_size()
|
|
|
923 // | |\
|
|
|
924 // | Normal Stack | -
|
|
|
925 // | |/
|
|
|
926 // P2 +------------------------+ Thread::stack_base()
|
|
|
927 //
|
|
|
928 // ** P1 (aka bottom) and size ( P2 = P1 - size) are the address and stack size returned from
|
|
|
929 // pthread_attr_getstack()
|
|
|
930
|
|
|
931 static void current_stack_region(address * bottom, size_t * size) {
|
|
|
932 #ifdef __APPLE__
|
|
|
933 pthread_t self = pthread_self();
|
|
|
934 void *stacktop = pthread_get_stackaddr_np(self);
|
|
|
935 *size = pthread_get_stacksize_np(self);
|
|
|
936 *bottom = (address) stacktop - *size;
|
|
|
937 #elif defined(__OpenBSD__)
|
|
|
938 stack_t ss;
|
|
|
939 int rslt = pthread_stackseg_np(pthread_self(), &ss);
|
|
|
940
|
|
|
941 if (rslt != 0)
|
|
|
942 fatal(err_msg("pthread_stackseg_np failed with err = %d", rslt));
|
|
|
943
|
|
|
944 *bottom = (address)((char *)ss.ss_sp - ss.ss_size);
|
|
|
945 *size = ss.ss_size;
|
|
|
946 #elif defined(_ALLBSD_SOURCE)
|
|
|
947 pthread_attr_t attr;
|
|
|
948
|
|
|
949 int rslt = pthread_attr_init(&attr);
|
|
|
950
|
|
|
951 // JVM needs to know exact stack location, abort if it fails
|
|
|
952 if (rslt != 0)
|
|
|
953 fatal(err_msg("pthread_attr_init failed with err = %d", rslt));
|
|
|
954
|
|
|
955 rslt = pthread_attr_get_np(pthread_self(), &attr);
|
|
|
956
|
|
|
957 if (rslt != 0)
|
|
|
958 fatal(err_msg("pthread_attr_get_np failed with err = %d", rslt));
|
|
|
959
|
|
|
960 if (pthread_attr_getstackaddr(&attr, (void **)bottom) != 0 ||
|
|
|
961 pthread_attr_getstacksize(&attr, size) != 0) {
|
|
|
962 fatal("Can not locate current stack attributes!");
|
|
|
963 }
|
|
|
964
|
|
|
965 pthread_attr_destroy(&attr);
|
|
|
966 #else
|
|
|
967 if (os::Bsd::is_initial_thread()) {
|
|
|
968 // initial thread needs special handling because pthread_getattr_np()
|
|
|
969 // may return bogus value.
|
|
|
970 *bottom = os::Bsd::initial_thread_stack_bottom();
|
|
|
971 *size = os::Bsd::initial_thread_stack_size();
|
|
|
972 } else {
|
|
|
973 pthread_attr_t attr;
|
|
|
974
|
|
|
975 int rslt = pthread_getattr_np(pthread_self(), &attr);
|
|
|
976
|
|
|
977 // JVM needs to know exact stack location, abort if it fails
|
|
|
978 if (rslt != 0) {
|
|
|
979 if (rslt == ENOMEM) {
|
|
|
980 vm_exit_out_of_memory(0, "pthread_getattr_np");
|
|
|
981 } else {
|
|
|
982 fatal(err_msg("pthread_getattr_np failed with errno = %d", rslt));
|
|
|
983 }
|
|
|
984 }
|
|
|
985
|
|
|
986 if (pthread_attr_getstack(&attr, (void **)bottom, size) != 0) {
|
|
|
987 fatal("Can not locate current stack attributes!");
|
|
|
988 }
|
|
|
989
|
|
|
990 pthread_attr_destroy(&attr);
|
|
|
991
|
|
|
992 }
|
|
|
993 #endif
|
|
|
994 assert(os::current_stack_pointer() >= *bottom &&
|
|
|
995 os::current_stack_pointer() < *bottom + *size, "just checking");
|
|
|
996 }
|
|
|
997
|
|
|
998 address os::current_stack_base() {
|
|
|
999 address bottom;
|
|
|
1000 size_t size;
|
|
|
1001 current_stack_region(&bottom, &size);
|
|
|
1002 return (bottom + size);
|
|
|
1003 }
|
|
|
1004
|
|
|
1005 size_t os::current_stack_size() {
|
|
|
1006 // stack size includes normal stack and HotSpot guard pages
|
|
|
1007 address bottom;
|
|
|
1008 size_t size;
|
|
|
1009 current_stack_region(&bottom, &size);
|
|
|
1010 return size;
|
|
|
1011 }
|
|
|
1012
|
|
|
1013 /////////////////////////////////////////////////////////////////////////////
|
|
|
1014 // helper functions for fatal error handler
|
|
|
1015
|
|
|
1016 void os::print_context(outputStream *st, void *context) {
|
|
|
1017 if (context == NULL) return;
|
|
|
1018
|
|
|
1019 ucontext_t *uc = (ucontext_t*)context;
|
|
|
1020 st->print_cr("Registers:");
|
|
|
1021 #ifdef AMD64
|
|
|
1022 st->print( "RAX=" INTPTR_FORMAT, uc->context_rax);
|
|
|
1023 st->print(", RBX=" INTPTR_FORMAT, uc->context_rbx);
|
|
|
1024 st->print(", RCX=" INTPTR_FORMAT, uc->context_rcx);
|
|
|
1025 st->print(", RDX=" INTPTR_FORMAT, uc->context_rdx);
|
|
|
1026 st->cr();
|
|
|
1027 st->print( "RSP=" INTPTR_FORMAT, uc->context_rsp);
|
|
|
1028 st->print(", RBP=" INTPTR_FORMAT, uc->context_rbp);
|
|
|
1029 st->print(", RSI=" INTPTR_FORMAT, uc->context_rsi);
|
|
|
1030 st->print(", RDI=" INTPTR_FORMAT, uc->context_rdi);
|
|
|
1031 st->cr();
|
|
|
1032 st->print( "R8 =" INTPTR_FORMAT, uc->context_r8);
|
|
|
1033 st->print(", R9 =" INTPTR_FORMAT, uc->context_r9);
|
|
|
1034 st->print(", R10=" INTPTR_FORMAT, uc->context_r10);
|
|
|
1035 st->print(", R11=" INTPTR_FORMAT, uc->context_r11);
|
|
|
1036 st->cr();
|
|
|
1037 st->print( "R12=" INTPTR_FORMAT, uc->context_r12);
|
|
|
1038 st->print(", R13=" INTPTR_FORMAT, uc->context_r13);
|
|
|
1039 st->print(", R14=" INTPTR_FORMAT, uc->context_r14);
|
|
|
1040 st->print(", R15=" INTPTR_FORMAT, uc->context_r15);
|
|
|
1041 st->cr();
|
|
|
1042 st->print( "RIP=" INTPTR_FORMAT, uc->context_rip);
|
|
|
1043 st->print(", EFLAGS=" INTPTR_FORMAT, uc->context_flags);
|
|
|
1044 st->print(", ERR=" INTPTR_FORMAT, uc->context_err);
|
|
|
1045 st->cr();
|
|
|
1046 st->print(" TRAPNO=" INTPTR_FORMAT, uc->context_trapno);
|
|
|
1047 #else
|
|
|
1048 st->print( "EAX=" INTPTR_FORMAT, uc->context_eax);
|
|
|
1049 st->print(", EBX=" INTPTR_FORMAT, uc->context_ebx);
|
|
|
1050 st->print(", ECX=" INTPTR_FORMAT, uc->context_ecx);
|
|
|
1051 st->print(", EDX=" INTPTR_FORMAT, uc->context_edx);
|
|
|
1052 st->cr();
|
|
|
1053 st->print( "ESP=" INTPTR_FORMAT, uc->context_esp);
|
|
|
1054 st->print(", EBP=" INTPTR_FORMAT, uc->context_ebp);
|
|
|
1055 st->print(", ESI=" INTPTR_FORMAT, uc->context_esi);
|
|
|
1056 st->print(", EDI=" INTPTR_FORMAT, uc->context_edi);
|
|
|
1057 st->cr();
|
|
|
1058 st->print( "EIP=" INTPTR_FORMAT, uc->context_eip);
|
|
|
1059 st->print(", EFLAGS=" INTPTR_FORMAT, uc->context_eflags);
|
|
|
1060 #endif // AMD64
|
|
|
1061 st->cr();
|
|
|
1062 st->cr();
|
|
|
1063
|
|
|
1064 intptr_t *sp = (intptr_t *)os::Bsd::ucontext_get_sp(uc);
|
|
|
1065 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp);
|
|
|
1066 print_hex_dump(st, (address)sp, (address)(sp + 8*sizeof(intptr_t)), sizeof(intptr_t));
|
|
|
1067 st->cr();
|
|
|
1068
|
|
|
1069 // Note: it may be unsafe to inspect memory near pc. For example, pc may
|
|
|
1070 // point to garbage if entry point in an nmethod is corrupted. Leave
|
|
|
1071 // this at the end, and hope for the best.
|
|
|
1072 address pc = os::Bsd::ucontext_get_pc(uc);
|
|
|
1073 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc);
|
|
|
1074 print_hex_dump(st, pc - 32, pc + 32, sizeof(char));
|
|
|
1075 }
|
|
|
1076
|
|
|
1077 void os::print_register_info(outputStream *st, void *context) {
|
|
|
1078 if (context == NULL) return;
|
|
|
1079
|
|
|
1080 ucontext_t *uc = (ucontext_t*)context;
|
|
|
1081
|
|
|
1082 st->print_cr("Register to memory mapping:");
|
|
|
1083 st->cr();
|
|
|
1084
|
|
|
1085 // this is horrendously verbose but the layout of the registers in the
|
|
|
1086 // context does not match how we defined our abstract Register set, so
|
|
|
1087 // we can't just iterate through the gregs area
|
|
|
1088
|
|
|
1089 // this is only for the "general purpose" registers
|
|
|
1090
|
|
|
1091 #ifdef AMD64
|
|
|
1092 st->print("RAX="); print_location(st, uc->context_rax);
|
|
|
1093 st->print("RBX="); print_location(st, uc->context_rbx);
|
|
|
1094 st->print("RCX="); print_location(st, uc->context_rcx);
|
|
|
1095 st->print("RDX="); print_location(st, uc->context_rdx);
|
|
|
1096 st->print("RSP="); print_location(st, uc->context_rsp);
|
|
|
1097 st->print("RBP="); print_location(st, uc->context_rbp);
|
|
|
1098 st->print("RSI="); print_location(st, uc->context_rsi);
|
|
|
1099 st->print("RDI="); print_location(st, uc->context_rdi);
|
|
|
1100 st->print("R8 ="); print_location(st, uc->context_r8);
|
|
|
1101 st->print("R9 ="); print_location(st, uc->context_r9);
|
|
|
1102 st->print("R10="); print_location(st, uc->context_r10);
|
|
|
1103 st->print("R11="); print_location(st, uc->context_r11);
|
|
|
1104 st->print("R12="); print_location(st, uc->context_r12);
|
|
|
1105 st->print("R13="); print_location(st, uc->context_r13);
|
|
|
1106 st->print("R14="); print_location(st, uc->context_r14);
|
|
|
1107 st->print("R15="); print_location(st, uc->context_r15);
|
|
|
1108 #else
|
|
|
1109 st->print("EAX="); print_location(st, uc->context_eax);
|
|
|
1110 st->print("EBX="); print_location(st, uc->context_ebx);
|
|
|
1111 st->print("ECX="); print_location(st, uc->context_ecx);
|
|
|
1112 st->print("EDX="); print_location(st, uc->context_edx);
|
|
|
1113 st->print("ESP="); print_location(st, uc->context_esp);
|
|
|
1114 st->print("EBP="); print_location(st, uc->context_ebp);
|
|
|
1115 st->print("ESI="); print_location(st, uc->context_esi);
|
|
|
1116 st->print("EDI="); print_location(st, uc->context_edi);
|
|
|
1117 #endif // AMD64
|
|
|
1118
|
|
|
1119 st->cr();
|
|
|
1120 }
|
|
|
1121
|
|
|
1122 void os::setup_fpu() {
|
|
|
1123 #ifndef AMD64
|
|
|
1124 address fpu_cntrl = StubRoutines::addr_fpu_cntrl_wrd_std();
|
|
|
1125 __asm__ volatile ( "fldcw (%0)" :
|
|
|
1126 : "r" (fpu_cntrl) : "memory");
|
|
|
1127 #endif // !AMD64
|
|
|
1128 }
|
