Mercurial > hg > truffle
annotate src/os_cpu/bsd_x86/vm/os_bsd_x86.cpp @ 4893:5e9fba4e8718
7142167: MAC: _get_previous_fp broken on bsd with llvm-gcc
Summary: LLVM-GCC (__llvm__) should use the same _get_previous_fp implementation as __clang__ (as is the case for os::current_stack_pointer).
Reviewed-by: twisti, never, dcubed
| author | kvn |
|---|---|
| date | Tue, 07 Feb 2012 11:33:15 -0800 |
| parents | 436b4a3231bf |
| children | da4be62fb889 |
| rev | line source |
|---|---|
| 3960 | 1 /* |
|
4893
5e9fba4e8718
7142167: MAC: _get_previous_fp broken on bsd with llvm-gcc
kvn
parents:
4006
diff
changeset
|
2 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved. |
| 3960 | 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() { | |
|
4893
5e9fba4e8718
7142167: MAC: _get_previous_fp broken on bsd with llvm-gcc
kvn
parents:
4006
diff
changeset
|
365 #if defined(SPARC_WORKS) || defined(__clang__) || defined(__llvm__) |
| 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 } |