Fri, 29 Apr 2016 00:06:10 +0800
Added MIPS 64-bit port.
aoqi@1 | 1 | /* |
aoqi@1 | 2 | * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved. |
aoqi@1 | 3 | * Copyright (c) 2015, 2016, Loongson Technology. All rights reserved. |
aoqi@1 | 4 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@1 | 5 | * |
aoqi@1 | 6 | * This code is free software; you can redistribute it and/or modify it |
aoqi@1 | 7 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@1 | 8 | * published by the Free Software Foundation. |
aoqi@1 | 9 | * |
aoqi@1 | 10 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@1 | 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@1 | 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@1 | 13 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@1 | 14 | * accompanied this code). |
aoqi@1 | 15 | * |
aoqi@1 | 16 | * You should have received a copy of the GNU General Public License version |
aoqi@1 | 17 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@1 | 18 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@1 | 19 | * |
aoqi@1 | 20 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@1 | 21 | * or visit www.oracle.com if you need additional information or have any |
aoqi@1 | 22 | * questions. |
aoqi@1 | 23 | * |
aoqi@1 | 24 | */ |
aoqi@1 | 25 | |
aoqi@1 | 26 | // do not include precompiled header file |
aoqi@1 | 27 | #include "asm/macroAssembler.hpp" |
aoqi@1 | 28 | #include "classfile/classLoader.hpp" |
aoqi@1 | 29 | #include "classfile/systemDictionary.hpp" |
aoqi@1 | 30 | #include "classfile/vmSymbols.hpp" |
aoqi@1 | 31 | #include "code/icBuffer.hpp" |
aoqi@1 | 32 | #include "code/vtableStubs.hpp" |
aoqi@1 | 33 | #include "interpreter/interpreter.hpp" |
aoqi@1 | 34 | #include "jvm_linux.h" |
aoqi@1 | 35 | #include "memory/allocation.inline.hpp" |
aoqi@1 | 36 | #include "mutex_linux.inline.hpp" |
aoqi@1 | 37 | #include "os_share_linux.hpp" |
aoqi@1 | 38 | #include "prims/jniFastGetField.hpp" |
aoqi@1 | 39 | #include "prims/jvm.h" |
aoqi@1 | 40 | #include "prims/jvm_misc.hpp" |
aoqi@1 | 41 | #include "runtime/arguments.hpp" |
aoqi@1 | 42 | #include "runtime/extendedPC.hpp" |
aoqi@1 | 43 | #include "runtime/frame.inline.hpp" |
aoqi@1 | 44 | #include "runtime/interfaceSupport.hpp" |
aoqi@1 | 45 | #include "runtime/java.hpp" |
aoqi@1 | 46 | #include "runtime/javaCalls.hpp" |
aoqi@1 | 47 | #include "runtime/mutexLocker.hpp" |
aoqi@1 | 48 | #include "runtime/osThread.hpp" |
aoqi@1 | 49 | #include "runtime/sharedRuntime.hpp" |
aoqi@1 | 50 | #include "runtime/stubRoutines.hpp" |
aoqi@1 | 51 | #include "runtime/thread.inline.hpp" |
aoqi@1 | 52 | #include "runtime/timer.hpp" |
aoqi@1 | 53 | #include "utilities/events.hpp" |
aoqi@1 | 54 | #include "utilities/vmError.hpp" |
aoqi@1 | 55 | #include "utilities/debug.hpp" |
aoqi@1 | 56 | #include "compiler/disassembler.hpp" |
aoqi@1 | 57 | // put OS-includes here |
aoqi@1 | 58 | # include <sys/types.h> |
aoqi@1 | 59 | # include <sys/mman.h> |
aoqi@1 | 60 | # include <pthread.h> |
aoqi@1 | 61 | # include <signal.h> |
aoqi@1 | 62 | # include <errno.h> |
aoqi@1 | 63 | # include <dlfcn.h> |
aoqi@1 | 64 | # include <stdlib.h> |
aoqi@1 | 65 | # include <stdio.h> |
aoqi@1 | 66 | # include <unistd.h> |
aoqi@1 | 67 | # include <sys/resource.h> |
aoqi@1 | 68 | # include <pthread.h> |
aoqi@1 | 69 | # include <sys/stat.h> |
aoqi@1 | 70 | # include <sys/time.h> |
aoqi@1 | 71 | # include <sys/utsname.h> |
aoqi@1 | 72 | # include <sys/socket.h> |
aoqi@1 | 73 | # include <sys/wait.h> |
aoqi@1 | 74 | # include <pwd.h> |
aoqi@1 | 75 | # include <poll.h> |
aoqi@1 | 76 | # include <ucontext.h> |
aoqi@1 | 77 | # include <fpu_control.h> |
aoqi@1 | 78 | |
aoqi@1 | 79 | #define REG_SP 29 |
aoqi@1 | 80 | #define REG_FP 30 |
aoqi@1 | 81 | |
aoqi@1 | 82 | address os::current_stack_pointer() { |
aoqi@1 | 83 | register void *sp __asm__ ("$29"); |
aoqi@1 | 84 | return (address) sp; |
aoqi@1 | 85 | } |
aoqi@1 | 86 | |
aoqi@1 | 87 | char* os::non_memory_address_word() { |
aoqi@1 | 88 | // Must never look like an address returned by reserve_memory, |
aoqi@1 | 89 | // even in its subfields (as defined by the CPU immediate fields, |
aoqi@1 | 90 | // if the CPU splits constants across multiple instructions). |
aoqi@1 | 91 | |
aoqi@1 | 92 | return (char*) -1; |
aoqi@1 | 93 | } |
aoqi@1 | 94 | |
aoqi@1 | 95 | void os::initialize_thread(Thread* thr) { |
aoqi@1 | 96 | // Nothing to do. |
aoqi@1 | 97 | } |
aoqi@1 | 98 | |
aoqi@1 | 99 | //the next three method just exists in os::Linux, none in other os, by yjl 6/21/2005 |
aoqi@1 | 100 | address os::Linux::ucontext_get_pc(ucontext_t * uc) { |
aoqi@1 | 101 | //return (address)uc->uc_mcontext.gregs[REG_PC]; |
aoqi@1 | 102 | return (address)uc->uc_mcontext.pc;//aoqi:what is gregs? |
aoqi@1 | 103 | } |
aoqi@1 | 104 | |
aoqi@1 | 105 | intptr_t* os::Linux::ucontext_get_sp(ucontext_t * uc) { |
aoqi@1 | 106 | return (intptr_t*)uc->uc_mcontext.gregs[REG_SP]; |
aoqi@1 | 107 | } |
aoqi@1 | 108 | |
aoqi@1 | 109 | intptr_t* os::Linux::ucontext_get_fp(ucontext_t * uc) { |
aoqi@1 | 110 | return (intptr_t*)uc->uc_mcontext.gregs[REG_FP]; |
aoqi@1 | 111 | } |
aoqi@1 | 112 | |
aoqi@1 | 113 | // For Forte Analyzer AsyncGetCallTrace profiling support - thread |
aoqi@1 | 114 | // is currently interrupted by SIGPROF. |
aoqi@1 | 115 | // os::Solaris::fetch_frame_from_ucontext() tries to skip nested signal |
aoqi@1 | 116 | // frames. Currently we don't do that on Linux, so it's the same as |
aoqi@1 | 117 | // os::fetch_frame_from_context(). |
aoqi@1 | 118 | ExtendedPC os::Linux::fetch_frame_from_ucontext(Thread* thread, |
aoqi@1 | 119 | ucontext_t* uc, intptr_t** ret_sp, intptr_t** ret_fp) { |
aoqi@1 | 120 | |
aoqi@1 | 121 | assert(thread != NULL, "just checking"); |
aoqi@1 | 122 | assert(ret_sp != NULL, "just checking"); |
aoqi@1 | 123 | assert(ret_fp != NULL, "just checking"); |
aoqi@1 | 124 | |
aoqi@1 | 125 | return os::fetch_frame_from_context(uc, ret_sp, ret_fp); |
aoqi@1 | 126 | } |
aoqi@1 | 127 | |
aoqi@1 | 128 | ExtendedPC os::fetch_frame_from_context(void* ucVoid, |
aoqi@1 | 129 | intptr_t** ret_sp, intptr_t** ret_fp) { |
aoqi@1 | 130 | |
aoqi@1 | 131 | ExtendedPC epc; |
aoqi@1 | 132 | ucontext_t* uc = (ucontext_t*)ucVoid; |
aoqi@1 | 133 | |
aoqi@1 | 134 | address pc = (address)os::Linux::ucontext_get_pc(uc); |
aoqi@1 | 135 | |
aoqi@1 | 136 | /* Jin: to capture invalid 32-bit PC, for debbuging */ |
aoqi@1 | 137 | if (((long)pc & 0xFFFFFFFF00000000UL) == 0) |
aoqi@1 | 138 | { |
aoqi@1 | 139 | pc = (address)((long)pc | 0x5500000000UL); |
aoqi@1 | 140 | tty->print_cr("<Error> 32-bit pc: %lx", pc); |
aoqi@1 | 141 | } |
aoqi@1 | 142 | |
aoqi@1 | 143 | if (uc != NULL) { |
aoqi@1 | 144 | epc = ExtendedPC(pc); |
aoqi@1 | 145 | if (ret_sp) *ret_sp = os::Linux::ucontext_get_sp(uc); |
aoqi@1 | 146 | if (ret_fp) *ret_fp = os::Linux::ucontext_get_fp(uc); |
aoqi@1 | 147 | } else { |
aoqi@1 | 148 | // construct empty ExtendedPC for return value checking |
aoqi@1 | 149 | epc = ExtendedPC(NULL); |
aoqi@1 | 150 | if (ret_sp) *ret_sp = (intptr_t *)NULL; |
aoqi@1 | 151 | if (ret_fp) *ret_fp = (intptr_t *)NULL; |
aoqi@1 | 152 | } |
aoqi@1 | 153 | |
aoqi@1 | 154 | return epc; |
aoqi@1 | 155 | } |
aoqi@1 | 156 | |
aoqi@1 | 157 | frame os::fetch_frame_from_context(void* ucVoid) { |
aoqi@1 | 158 | intptr_t* sp; |
aoqi@1 | 159 | intptr_t* fp; |
aoqi@1 | 160 | ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp); |
aoqi@1 | 161 | return frame(sp, fp, epc.pc()); |
aoqi@1 | 162 | } |
aoqi@1 | 163 | |
aoqi@1 | 164 | // By default, gcc always save frame pointer (%ebp/%rbp) on stack. It may get |
aoqi@1 | 165 | // turned off by -fomit-frame-pointer, |
aoqi@1 | 166 | frame os::get_sender_for_C_frame(frame* fr) { |
aoqi@1 | 167 | //return frame(fr->sender_sp(), fr->link(), fr->sender_pc()); |
aoqi@1 | 168 | //tty->print("c frame sp = 0x%lx, fp=0x%lx, pc=0x%lx \n", (int)fr->sp(),(int)fr->fp(),(int)fr->pc()); |
aoqi@1 | 169 | //tty->print("c frame send_sp =0x%lx, fp = 0x%lx, pc = 0x%lx \n", |
aoqi@1 | 170 | // (int) fr->sender_sp(), (int) fr->link(), (int)fr->sender_pc()); |
aoqi@1 | 171 | return frame(fr->sender_sp(), fr->link(), fr->sender_pc()); |
aoqi@1 | 172 | } |
aoqi@1 | 173 | |
aoqi@1 | 174 | //intptr_t* _get_previous_fp() { |
aoqi@1 | 175 | //see StubGenerator::generate_get_previous_fp in stubGenerator_gs2.cpp |
aoqi@1 | 176 | jint* os::get_previous_fp() { |
aoqi@1 | 177 | int *pc; |
aoqi@1 | 178 | int sp; |
aoqi@1 | 179 | int *pc_limit = (int*)(void*)&os::get_previous_fp; |
aoqi@1 | 180 | int insn; |
aoqi@1 | 181 | |
aoqi@1 | 182 | { |
aoqi@1 | 183 | l_pc:; |
aoqi@1 | 184 | pc = (int*)&&l_pc; |
aoqi@1 | 185 | __asm__ __volatile__ ("move %0, $sp" : "=r" (sp)); |
aoqi@1 | 186 | } |
aoqi@1 | 187 | |
aoqi@1 | 188 | do { |
aoqi@1 | 189 | --pc; |
aoqi@1 | 190 | insn = *pc; |
aoqi@1 | 191 | switch(bitfield(insn, 16, 16)) { |
aoqi@1 | 192 | case 0x27bd: /* addiu $sp,$sp,-i */ |
aoqi@1 | 193 | case 0x23bd: /* addi $sp,$sp,-i */ |
aoqi@1 | 194 | case 0x67bd: /* daddiu $sp,$sp,-i */ |
aoqi@1 | 195 | case 0x63bd: /* daddi $sp,$sp,-i */ |
aoqi@1 | 196 | assert ((short)bitfield(insn, 0, 16)<0, "bad frame"); |
aoqi@1 | 197 | sp -= (short)bitfield(insn, 0, 16); |
aoqi@1 | 198 | return (jint*)sp; |
aoqi@1 | 199 | } |
aoqi@1 | 200 | } while (pc>pc_limit); |
aoqi@1 | 201 | |
aoqi@1 | 202 | ShouldNotReachHere(); |
aoqi@1 | 203 | } |
aoqi@1 | 204 | |
aoqi@1 | 205 | frame os::current_frame() { |
aoqi@1 | 206 | tty->print("@@@@@@@@@@@@@@@@@@@get_previous_fp = 0x%lx \n", (intptr_t)(get_previous_fp())); |
aoqi@1 | 207 | frame myframe((intptr_t*)os::current_stack_pointer(), |
aoqi@1 | 208 | (intptr_t*)get_previous_fp(), |
aoqi@1 | 209 | CAST_FROM_FN_PTR(address, os::current_frame)); |
aoqi@1 | 210 | if (os::is_first_C_frame(&myframe)) { |
aoqi@1 | 211 | // stack is not walkable |
aoqi@1 | 212 | return frame(NULL, NULL, NULL); |
aoqi@1 | 213 | } else { |
aoqi@1 | 214 | return os::get_sender_for_C_frame(&myframe); |
aoqi@1 | 215 | } |
aoqi@1 | 216 | } |
aoqi@1 | 217 | |
aoqi@1 | 218 | //x86 add 2 new assemble function here! |
aoqi@1 | 219 | extern "C" int |
aoqi@1 | 220 | JVM_handle_linux_signal(int sig, |
aoqi@1 | 221 | siginfo_t* info, |
aoqi@1 | 222 | void* ucVoid, |
aoqi@1 | 223 | int abort_if_unrecognized) { |
aoqi@1 | 224 | #ifndef PRODUCT |
aoqi@1 | 225 | tty->print_cr("Signal: signo=%d, sicode=%d, sierrno=%d, siaddr=%lx", |
aoqi@1 | 226 | info->si_signo, |
aoqi@1 | 227 | info->si_code, |
aoqi@1 | 228 | info->si_errno, |
aoqi@1 | 229 | info->si_addr); |
aoqi@1 | 230 | #endif |
aoqi@1 | 231 | |
aoqi@1 | 232 | ucontext_t* uc = (ucontext_t*) ucVoid; |
aoqi@1 | 233 | |
aoqi@1 | 234 | Thread* t = ThreadLocalStorage::get_thread_slow(); |
aoqi@1 | 235 | |
aoqi@1 | 236 | SignalHandlerMark shm(t); |
aoqi@1 | 237 | |
aoqi@1 | 238 | // Note: it's not uncommon that JNI code uses signal/sigset to install |
aoqi@1 | 239 | // then restore certain signal handler (e.g. to temporarily block SIGPIPE, |
aoqi@1 | 240 | // or have a SIGILL handler when detecting CPU type). When that happens, |
aoqi@1 | 241 | // JVM_handle_linux_signal() might be invoked with junk info/ucVoid. To |
aoqi@1 | 242 | // avoid unnecessary crash when libjsig is not preloaded, try handle signals |
aoqi@1 | 243 | // that do not require siginfo/ucontext first. |
aoqi@1 | 244 | |
aoqi@1 | 245 | //if (sig == SIGPIPE || sig == SIGXFSZ) { |
aoqi@1 | 246 | if (sig == SIGPIPE) { |
aoqi@1 | 247 | // allow chained handler to go first |
aoqi@1 | 248 | if (os::Linux::chained_handler(sig, info, ucVoid)) { |
aoqi@1 | 249 | return true; |
aoqi@1 | 250 | } else { |
aoqi@1 | 251 | if (PrintMiscellaneous && (WizardMode || Verbose)) { |
aoqi@1 | 252 | warning("Ignoring SIGPIPE - see bug 4229104"); |
aoqi@1 | 253 | } |
aoqi@1 | 254 | return true; |
aoqi@1 | 255 | } |
aoqi@1 | 256 | } |
aoqi@1 | 257 | |
aoqi@1 | 258 | JavaThread* thread = NULL; |
aoqi@1 | 259 | VMThread* vmthread = NULL; |
aoqi@1 | 260 | if (os::Linux::signal_handlers_are_installed) { |
aoqi@1 | 261 | if (t != NULL ){ |
aoqi@1 | 262 | if(t->is_Java_thread()) { |
aoqi@1 | 263 | #ifndef PRODUCT |
aoqi@1 | 264 | //tty->print_cr("this thread is a java thread"); |
aoqi@1 | 265 | #endif |
aoqi@1 | 266 | thread = (JavaThread*)t; |
aoqi@1 | 267 | } |
aoqi@1 | 268 | else if(t->is_VM_thread()){ |
aoqi@1 | 269 | #ifndef PRODUCT |
aoqi@1 | 270 | //tty->print_cr("this thread is a VM thread\n"); |
aoqi@1 | 271 | #endif |
aoqi@1 | 272 | vmthread = (VMThread *)t; |
aoqi@1 | 273 | } |
aoqi@1 | 274 | } |
aoqi@1 | 275 | } |
aoqi@1 | 276 | |
aoqi@1 | 277 | // decide if this trap can be handled by a stub |
aoqi@1 | 278 | address stub = NULL; |
aoqi@1 | 279 | address pc = NULL; |
aoqi@1 | 280 | |
aoqi@1 | 281 | pc = (address) os::Linux::ucontext_get_pc(uc); |
aoqi@1 | 282 | #ifndef PRODUCT |
aoqi@1 | 283 | tty->print_cr("pc=%lx", pc); |
aoqi@1 | 284 | os::print_context(tty, uc); |
aoqi@1 | 285 | #endif |
aoqi@1 | 286 | //%note os_trap_1 |
aoqi@1 | 287 | if (info != NULL && uc != NULL && thread != NULL) { |
aoqi@1 | 288 | pc = (address) os::Linux::ucontext_get_pc(uc); |
aoqi@1 | 289 | // Handle ALL stack overflow variations here |
aoqi@1 | 290 | if (sig == SIGSEGV) { |
aoqi@1 | 291 | address addr = (address) info->si_addr; |
aoqi@1 | 292 | // check if fault address is within thread stack |
aoqi@1 | 293 | #ifndef PRODUCT |
aoqi@1 | 294 | //tty->print("handle all stack overflow variations: "); |
aoqi@1 | 295 | /*tty->print("addr = %lx, stack base = %lx, stack top = %lx\n", |
aoqi@1 | 296 | addr, |
aoqi@1 | 297 | thread->stack_base(), |
aoqi@1 | 298 | thread->stack_base() - thread->stack_size()); |
aoqi@1 | 299 | */ |
aoqi@1 | 300 | #endif |
aoqi@1 | 301 | |
aoqi@1 | 302 | if (addr < thread->stack_base() && |
aoqi@1 | 303 | addr >= thread->stack_base() - thread->stack_size()) { |
aoqi@1 | 304 | // stack overflow |
aoqi@1 | 305 | #ifndef PRODUCT |
aoqi@1 | 306 | tty->print("stack exception check \n"); |
aoqi@1 | 307 | #endif |
aoqi@1 | 308 | if (thread->in_stack_yellow_zone(addr)) { |
aoqi@1 | 309 | #ifndef PRODUCT |
aoqi@1 | 310 | tty->print("exception addr is in yellow zone\n"); |
aoqi@1 | 311 | #endif |
aoqi@1 | 312 | thread->disable_stack_yellow_zone(); |
aoqi@1 | 313 | if (thread->thread_state() == _thread_in_Java) { |
aoqi@1 | 314 | // Throw a stack overflow exception. Guard pages will be reenabled |
aoqi@1 | 315 | // while unwinding the stack. |
aoqi@1 | 316 | #ifndef PRODUCT |
aoqi@1 | 317 | tty->print("this thread is in java\n"); |
aoqi@1 | 318 | #endif |
aoqi@1 | 319 | stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW); |
aoqi@1 | 320 | } else { |
aoqi@1 | 321 | // Thread was in the vm or native code. Return and try to finish. |
aoqi@1 | 322 | #ifndef PRODUCT |
aoqi@1 | 323 | tty->print("this thread is in vm or native codes and return\n"); |
aoqi@1 | 324 | #endif |
aoqi@1 | 325 | return 1; |
aoqi@1 | 326 | } |
aoqi@1 | 327 | } else if (thread->in_stack_red_zone(addr)) { |
aoqi@1 | 328 | // Fatal red zone violation. Disable the guard pages and fall through |
aoqi@1 | 329 | // to handle_unexpected_exception way down below. |
aoqi@1 | 330 | #ifndef PRODUCT |
aoqi@1 | 331 | tty->print("exception addr is in red zone\n"); |
aoqi@1 | 332 | #endif |
aoqi@1 | 333 | thread->disable_stack_red_zone(); |
aoqi@1 | 334 | #ifndef PRODUCT |
aoqi@1 | 335 | tty->print_raw_cr("An irrecoverable stack overflow has occurred."); |
aoqi@1 | 336 | #endif |
aoqi@1 | 337 | } else { |
aoqi@1 | 338 | // Accessing stack address below sp may cause SEGV if current |
aoqi@1 | 339 | // thread has MAP_GROWSDOWN stack. This should only happen when |
aoqi@1 | 340 | // current thread was created by user code with MAP_GROWSDOWN flag |
aoqi@1 | 341 | // and then attached to VM. See notes in os_linux.cpp. |
aoqi@1 | 342 | #ifndef PRODUCT |
aoqi@1 | 343 | tty->print("exception addr is neither in yellow zone nor in the red one\n"); |
aoqi@1 | 344 | #endif |
aoqi@1 | 345 | if (thread->osthread()->expanding_stack() == 0) { |
aoqi@1 | 346 | thread->osthread()->set_expanding_stack(); |
aoqi@1 | 347 | if (os::Linux::manually_expand_stack(thread, addr)) { |
aoqi@1 | 348 | thread->osthread()->clear_expanding_stack(); |
aoqi@1 | 349 | return 1; |
aoqi@1 | 350 | } |
aoqi@1 | 351 | thread->osthread()->clear_expanding_stack(); |
aoqi@1 | 352 | } else { |
aoqi@1 | 353 | fatal("recursive segv. expanding stack."); |
aoqi@1 | 354 | } |
aoqi@1 | 355 | } |
aoqi@1 | 356 | } //addr < |
aoqi@1 | 357 | } //sig == SIGSEGV |
aoqi@1 | 358 | |
aoqi@1 | 359 | if (thread->thread_state() == _thread_in_Java) { |
aoqi@1 | 360 | // Java thread running in Java code => find exception handler if any |
aoqi@1 | 361 | // a fault inside compiled code, the interpreter, or a stub |
aoqi@1 | 362 | #ifndef PRODUCT |
aoqi@1 | 363 | tty->print("java thread running in java code\n"); |
aoqi@1 | 364 | tty->print_cr("polling address = %lx, sig=%d", os::get_polling_page(), sig); |
aoqi@1 | 365 | #endif |
aoqi@1 | 366 | if (sig == SIGSEGV && os::is_poll_address((address)info->si_addr)) { |
aoqi@1 | 367 | |
aoqi@1 | 368 | stub = SharedRuntime::get_poll_stub(pc); |
aoqi@1 | 369 | } else if (sig == SIGBUS /* && info->si_code == BUS_OBJERR */) { |
aoqi@1 | 370 | // BugId 4454115: A read from a MappedByteBuffer can fault |
aoqi@1 | 371 | // here if the underlying file has been truncated. |
aoqi@1 | 372 | // Do not crash the VM in such a case. |
aoqi@1 | 373 | CodeBlob* cb = CodeCache::find_blob_unsafe(pc); |
aoqi@1 | 374 | nmethod* nm = cb->is_nmethod() ? (nmethod*)cb : NULL; |
aoqi@1 | 375 | #ifndef PRODUCT |
aoqi@1 | 376 | tty->print("cb = %lx, nm = %lx\n", cb, nm); |
aoqi@1 | 377 | #endif |
aoqi@1 | 378 | if (nm != NULL && nm->has_unsafe_access()) { |
aoqi@1 | 379 | stub = StubRoutines::handler_for_unsafe_access(); |
aoqi@1 | 380 | } |
aoqi@1 | 381 | } else if (sig == SIGFPE /* && info->si_code == FPE_INTDIV */) { |
aoqi@1 | 382 | // HACK: si_code does not work on linux 2.2.12-20!!! |
aoqi@1 | 383 | int op = pc[0] & 0x3f; |
aoqi@1 | 384 | int op1 = pc[3] & 0x3f; |
aoqi@1 | 385 | //FIXME, Must port to mips code!! |
aoqi@1 | 386 | switch (op) { |
aoqi@1 | 387 | case 0x1e: //ddiv |
aoqi@1 | 388 | case 0x1f: //ddivu |
aoqi@1 | 389 | case 0x1a: //div |
aoqi@1 | 390 | case 0x1b: //divu |
aoqi@1 | 391 | case 0x34: //trap |
aoqi@1 | 392 | /* In MIPS, div_by_zero exception can only be triggered by explicit 'trap'. |
aoqi@1 | 393 | * Ref: [c1_LIRAssembler_mips.cpp] arithmetic_idiv() |
aoqi@1 | 394 | */ |
aoqi@1 | 395 | stub = SharedRuntime::continuation_for_implicit_exception(thread, |
aoqi@1 | 396 | pc, |
aoqi@1 | 397 | SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); |
aoqi@1 | 398 | break; |
aoqi@1 | 399 | default: |
aoqi@1 | 400 | // TODO: handle more cases if we are using other x86 instructions |
aoqi@1 | 401 | // that can generate SIGFPE signal on linux. |
aoqi@1 | 402 | tty->print_cr("unknown opcode 0x%X -0x%X with SIGFPE.", op, op1); |
aoqi@1 | 403 | //fatal("please update this code."); |
aoqi@1 | 404 | } |
aoqi@1 | 405 | } |
aoqi@1 | 406 | else if (sig == SIGSEGV && |
aoqi@1 | 407 | !MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) { |
aoqi@1 | 408 | // Determination of interpreter/vtable stub/compiled code null exception |
aoqi@1 | 409 | #ifndef PRODUCT |
aoqi@1 | 410 | tty->print("continuation for implicit exception\n"); |
aoqi@1 | 411 | #endif |
aoqi@1 | 412 | stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); |
aoqi@1 | 413 | } |
aoqi@1 | 414 | } else if (thread->thread_state() == _thread_in_vm && |
aoqi@1 | 415 | sig == SIGBUS && /* info->si_code == BUS_OBJERR && */ |
aoqi@1 | 416 | thread->doing_unsafe_access()) { |
aoqi@1 | 417 | #ifndef PRODUCT |
aoqi@1 | 418 | tty->print_cr("SIGBUS in vm thread \n"); |
aoqi@1 | 419 | #endif |
aoqi@1 | 420 | stub = StubRoutines::handler_for_unsafe_access(); |
aoqi@1 | 421 | } |
aoqi@1 | 422 | |
aoqi@1 | 423 | // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in |
aoqi@1 | 424 | // and the heap gets shrunk before the field access. |
aoqi@1 | 425 | if ((sig == SIGSEGV) || (sig == SIGBUS)) { |
aoqi@1 | 426 | #ifndef PRODUCT |
aoqi@1 | 427 | //tty->print("jni fast get trap: "); |
aoqi@1 | 428 | #endif |
aoqi@1 | 429 | address addr = JNI_FastGetField::find_slowcase_pc(pc); |
aoqi@1 | 430 | if (addr != (address)-1) { |
aoqi@1 | 431 | stub = addr; |
aoqi@1 | 432 | } |
aoqi@1 | 433 | #ifndef PRODUCT |
aoqi@1 | 434 | //tty->print_cr("addr = %d, stub = %lx", addr, stub); |
aoqi@1 | 435 | #endif |
aoqi@1 | 436 | } |
aoqi@1 | 437 | |
aoqi@1 | 438 | // Check to see if we caught the safepoint code in the |
aoqi@1 | 439 | // process of write protecting the memory serialization page. |
aoqi@1 | 440 | // It write enables the page immediately after protecting it |
aoqi@1 | 441 | // so we can just return to retry the write. |
aoqi@1 | 442 | if ((sig == SIGSEGV) && |
aoqi@1 | 443 | os::is_memory_serialize_page(thread, (address) info->si_addr)) { |
aoqi@1 | 444 | // Block current thread until the memory serialize page permission restored. |
aoqi@1 | 445 | #ifndef PRODUCT |
aoqi@1 | 446 | //tty->print("write protecting the memory serialiazation page\n"); |
aoqi@1 | 447 | #endif |
aoqi@1 | 448 | os::block_on_serialize_page_trap(); |
aoqi@1 | 449 | return true; |
aoqi@1 | 450 | } |
aoqi@1 | 451 | } |
aoqi@1 | 452 | |
aoqi@1 | 453 | // Execution protection violation |
aoqi@1 | 454 | // |
aoqi@1 | 455 | // This should be kept as the last step in the triage. We don't |
aoqi@1 | 456 | // have a dedicated trap number for a no-execute fault, so be |
aoqi@1 | 457 | // conservative and allow other handlers the first shot. |
aoqi@1 | 458 | // |
aoqi@1 | 459 | // Note: We don't test that info->si_code == SEGV_ACCERR here. |
aoqi@1 | 460 | // this si_code is so generic that it is almost meaningless; and |
aoqi@1 | 461 | // the si_code for this condition may change in the future. |
aoqi@1 | 462 | // Furthermore, a false-positive should be harmless. |
aoqi@1 | 463 | if (UnguardOnExecutionViolation > 0 && |
aoqi@1 | 464 | //(sig == SIGSEGV || sig == SIGBUS) && |
aoqi@1 | 465 | //uc->uc_mcontext.gregs[REG_TRAPNO] == trap_page_fault) { |
aoqi@1 | 466 | (sig == SIGSEGV || sig == SIGBUS |
aoqi@1 | 467 | #ifdef OPT_RANGECHECK |
aoqi@1 | 468 | || sig == SIGSYS |
aoqi@1 | 469 | #endif |
aoqi@1 | 470 | ) && |
aoqi@1 | 471 | //(uc->uc_mcontext.cause == 2 || uc->uc_mcontext.cause == 3)) { |
aoqi@1 | 472 | (uc->uc_mcontext.hi1 == 2 || uc->uc_mcontext.hi1 == 3)) { |
aoqi@1 | 473 | //aoqi: copy from jdk1.5, dont understand the struct mcontext_t. |
aoqi@1 | 474 | #ifndef PRODUCT |
aoqi@1 | 475 | tty->print_cr("execution protection violation\n"); |
aoqi@1 | 476 | #endif |
aoqi@1 | 477 | |
aoqi@1 | 478 | int page_size = os::vm_page_size(); |
aoqi@1 | 479 | address addr = (address) info->si_addr; |
aoqi@1 | 480 | address pc = os::Linux::ucontext_get_pc(uc); |
aoqi@1 | 481 | // Make sure the pc and the faulting address are sane. |
aoqi@1 | 482 | // |
aoqi@1 | 483 | // If an instruction spans a page boundary, and the page containing |
aoqi@1 | 484 | // the beginning of the instruction is executable but the following |
aoqi@1 | 485 | // page is not, the pc and the faulting address might be slightly |
aoqi@1 | 486 | // different - we still want to unguard the 2nd page in this case. |
aoqi@1 | 487 | // |
aoqi@1 | 488 | // 15 bytes seems to be a (very) safe value for max instruction size. |
aoqi@1 | 489 | bool pc_is_near_addr = |
aoqi@1 | 490 | (pointer_delta((void*) addr, (void*) pc, sizeof(char)) < 15); |
aoqi@1 | 491 | bool instr_spans_page_boundary = |
aoqi@1 | 492 | (align_size_down((intptr_t) pc ^ (intptr_t) addr, |
aoqi@1 | 493 | (intptr_t) page_size) > 0); |
aoqi@1 | 494 | |
aoqi@1 | 495 | if (pc == addr || (pc_is_near_addr && instr_spans_page_boundary)) { |
aoqi@1 | 496 | static volatile address last_addr = |
aoqi@1 | 497 | (address) os::non_memory_address_word(); |
aoqi@1 | 498 | |
aoqi@1 | 499 | // In conservative mode, don't unguard unless the address is in the VM |
aoqi@1 | 500 | if (addr != last_addr && |
aoqi@1 | 501 | (UnguardOnExecutionViolation > 1 || os::address_is_in_vm(addr))) { |
aoqi@1 | 502 | |
aoqi@1 | 503 | // Set memory to RWX and retry |
aoqi@1 | 504 | address page_start = |
aoqi@1 | 505 | (address) align_size_down((intptr_t) addr, (intptr_t) page_size); |
aoqi@1 | 506 | //bool res = os::protect_memory((char*) page_start, page_size, |
aoqi@1 | 507 | // os::MEM_PROT_RWX); |
aoqi@1 | 508 | bool res = os::unguard_memory((char*) page_start, page_size);//aoqi:? |
aoqi@1 | 509 | |
aoqi@1 | 510 | if (PrintMiscellaneous && Verbose) { |
aoqi@1 | 511 | char buf[256]; |
aoqi@1 | 512 | jio_snprintf(buf, sizeof(buf), "Execution protection violation " |
aoqi@1 | 513 | "at " INTPTR_FORMAT |
aoqi@1 | 514 | ", unguarding " INTPTR_FORMAT ": %s, errno=%d", addr, |
aoqi@1 | 515 | page_start, (res ? "success" : "failed"), errno); |
aoqi@1 | 516 | tty->print_raw_cr(buf); |
aoqi@1 | 517 | } |
aoqi@1 | 518 | stub = pc; |
aoqi@1 | 519 | |
aoqi@1 | 520 | // Set last_addr so if we fault again at the same address, we don't end |
aoqi@1 | 521 | // up in an endless loop. |
aoqi@1 | 522 | // |
aoqi@1 | 523 | // There are two potential complications here. Two threads trapping at |
aoqi@1 | 524 | // the same address at the same time could cause one of the threads to |
aoqi@1 | 525 | // think it already unguarded, and abort the VM. Likely very rare. |
aoqi@1 | 526 | // |
aoqi@1 | 527 | // The other race involves two threads alternately trapping at |
aoqi@1 | 528 | // different addresses and failing to unguard the page, resulting in |
aoqi@1 | 529 | // an endless loop. This condition is probably even more unlikely than |
aoqi@1 | 530 | // the first. |
aoqi@1 | 531 | // |
aoqi@1 | 532 | // Although both cases could be avoided by using locks or thread local |
aoqi@1 | 533 | // last_addr, these solutions are unnecessary complication: this |
aoqi@1 | 534 | // handler is a best-effort safety net, not a complete solution. It is |
aoqi@1 | 535 | // disabled by default and should only be used as a workaround in case |
aoqi@1 | 536 | // we missed any no-execute-unsafe VM code. |
aoqi@1 | 537 | |
aoqi@1 | 538 | last_addr = addr; |
aoqi@1 | 539 | } |
aoqi@1 | 540 | } |
aoqi@1 | 541 | } |
aoqi@1 | 542 | |
aoqi@1 | 543 | if (stub != NULL) { |
aoqi@1 | 544 | #ifndef PRODUCT |
aoqi@1 | 545 | //tty->print_cr("resolved stub=%lx\n",stub); |
aoqi@1 | 546 | #endif |
aoqi@1 | 547 | // save all thread context in case we need to restore it |
aoqi@1 | 548 | if (thread != NULL) thread->set_saved_exception_pc(pc); |
aoqi@1 | 549 | |
aoqi@1 | 550 | uc->uc_mcontext.pc = (greg_t)stub; |
aoqi@1 | 551 | return true; |
aoqi@1 | 552 | } |
aoqi@1 | 553 | |
aoqi@1 | 554 | // signal-chaining |
aoqi@1 | 555 | if (os::Linux::chained_handler(sig, info, ucVoid)) { |
aoqi@1 | 556 | #ifndef PRODUCT |
aoqi@1 | 557 | tty->print_cr("signal chaining\n"); |
aoqi@1 | 558 | #endif |
aoqi@1 | 559 | return true; |
aoqi@1 | 560 | } |
aoqi@1 | 561 | |
aoqi@1 | 562 | if (!abort_if_unrecognized) { |
aoqi@1 | 563 | // caller wants another chance, so give it to him |
aoqi@1 | 564 | #ifndef PRODUCT |
aoqi@1 | 565 | tty->print_cr("abort becauce of unrecognized\n"); |
aoqi@1 | 566 | #endif |
aoqi@1 | 567 | return false; |
aoqi@1 | 568 | } |
aoqi@1 | 569 | |
aoqi@1 | 570 | if (pc == NULL && uc != NULL) { |
aoqi@1 | 571 | pc = os::Linux::ucontext_get_pc(uc); |
aoqi@1 | 572 | } |
aoqi@1 | 573 | |
aoqi@1 | 574 | // unmask current signal |
aoqi@1 | 575 | sigset_t newset; |
aoqi@1 | 576 | sigemptyset(&newset); |
aoqi@1 | 577 | sigaddset(&newset, sig); |
aoqi@1 | 578 | sigprocmask(SIG_UNBLOCK, &newset, NULL); |
aoqi@1 | 579 | #ifndef PRODUCT |
aoqi@1 | 580 | tty->print_cr("VMError in signal handler\n"); |
aoqi@1 | 581 | #endif |
aoqi@1 | 582 | VMError err(t, sig, pc, info, ucVoid); |
aoqi@1 | 583 | err.report_and_die(); |
aoqi@1 | 584 | |
aoqi@1 | 585 | ShouldNotReachHere(); |
aoqi@1 | 586 | } |
aoqi@1 | 587 | |
aoqi@1 | 588 | void os::Linux::init_thread_fpu_state(void) { |
aoqi@1 | 589 | // set fpu to 53 bit precision |
aoqi@1 | 590 | //set_fpu_control_word(0x27f); |
aoqi@1 | 591 | } |
aoqi@1 | 592 | |
aoqi@1 | 593 | int os::Linux::get_fpu_control_word(void) { |
aoqi@1 | 594 | } |
aoqi@1 | 595 | |
aoqi@1 | 596 | void os::Linux::set_fpu_control_word(int fpu_control) { |
aoqi@1 | 597 | } |
aoqi@1 | 598 | |
aoqi@1 | 599 | bool os::is_allocatable(size_t bytes) { |
aoqi@1 | 600 | |
aoqi@1 | 601 | if (bytes < 2 * G) { |
aoqi@1 | 602 | return true; |
aoqi@1 | 603 | } |
aoqi@1 | 604 | |
aoqi@1 | 605 | char* addr = reserve_memory(bytes, NULL); |
aoqi@1 | 606 | |
aoqi@1 | 607 | if (addr != NULL) { |
aoqi@1 | 608 | release_memory(addr, bytes); |
aoqi@1 | 609 | } |
aoqi@1 | 610 | |
aoqi@1 | 611 | return addr != NULL; |
aoqi@1 | 612 | } |
aoqi@1 | 613 | |
aoqi@1 | 614 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@1 | 615 | // thread stack |
aoqi@1 | 616 | |
aoqi@1 | 617 | size_t os::Linux::min_stack_allowed = 96 * K; |
aoqi@1 | 618 | |
aoqi@1 | 619 | |
aoqi@1 | 620 | // Test if pthread library can support variable thread stack size. LinuxThreads |
aoqi@1 | 621 | // in fixed stack mode allocates 2M fixed slot for each thread. LinuxThreads |
aoqi@1 | 622 | // in floating stack mode and NPTL support variable stack size. |
aoqi@1 | 623 | bool os::Linux::supports_variable_stack_size() { |
aoqi@1 | 624 | if (os::Linux::is_NPTL()) { |
aoqi@1 | 625 | // NPTL, yes |
aoqi@1 | 626 | return true; |
aoqi@1 | 627 | |
aoqi@1 | 628 | } else { |
aoqi@1 | 629 | // Note: We can't control default stack size when creating a thread. |
aoqi@1 | 630 | // If we use non-default stack size (pthread_attr_setstacksize), both |
aoqi@1 | 631 | // floating stack and non-floating stack LinuxThreads will return the |
aoqi@1 | 632 | // same value. This makes it impossible to implement this function by |
aoqi@1 | 633 | // detecting thread stack size directly. |
aoqi@1 | 634 | // |
aoqi@1 | 635 | // An alternative approach is to check %gs. Fixed-stack LinuxThreads |
aoqi@1 | 636 | // do not use %gs, so its value is 0. Floating-stack LinuxThreads use |
aoqi@1 | 637 | // %gs (either as LDT selector or GDT selector, depending on kernel) |
aoqi@1 | 638 | // to access thread specific data. |
aoqi@1 | 639 | // |
aoqi@1 | 640 | // Note that %gs is a reserved glibc register since early 2001, so |
aoqi@1 | 641 | // applications are not allowed to change its value (Ulrich Drepper from |
aoqi@1 | 642 | // Red Hat confirmed that all known offenders have been modified to use |
aoqi@1 | 643 | // either %fs or TSD). In the worst case scenario, when VM is embedded in |
aoqi@1 | 644 | // a native application that plays with %gs, we might see non-zero %gs |
aoqi@1 | 645 | // even LinuxThreads is running in fixed stack mode. As the result, we'll |
aoqi@1 | 646 | // return true and skip _thread_safety_check(), so we may not be able to |
aoqi@1 | 647 | // detect stack-heap collisions. But otherwise it's harmless. |
aoqi@1 | 648 | // |
aoqi@1 | 649 | //FIXME we should do something here not just return false. by yjl 6/21/2005 |
aoqi@1 | 650 | return false; |
aoqi@1 | 651 | } |
aoqi@1 | 652 | } |
aoqi@1 | 653 | |
aoqi@1 | 654 | // return default stack size for thr_type |
aoqi@1 | 655 | //maybe we need change this, FIXME by yjl 6/21/2005 |
aoqi@1 | 656 | size_t os::Linux::default_stack_size(os::ThreadType thr_type) { |
aoqi@1 | 657 | // default stack size (compiler thread needs larger stack) |
aoqi@1 | 658 | size_t s = (thr_type == os::compiler_thread ? 2 * M : 512 * K); |
aoqi@1 | 659 | return s; |
aoqi@1 | 660 | } |
aoqi@1 | 661 | |
aoqi@1 | 662 | size_t os::Linux::default_guard_size(os::ThreadType thr_type) { |
aoqi@1 | 663 | // Creating guard page is very expensive. Java thread has HotSpot |
aoqi@1 | 664 | // guard page, only enable glibc guard page for non-Java threads. |
aoqi@1 | 665 | return (thr_type == java_thread ? 0 : page_size()); |
aoqi@1 | 666 | } |
aoqi@1 | 667 | |
aoqi@1 | 668 | // Java thread: |
aoqi@1 | 669 | // |
aoqi@1 | 670 | // Low memory addresses |
aoqi@1 | 671 | // +------------------------+ |
aoqi@1 | 672 | // | |\ JavaThread created by VM does not have glibc |
aoqi@1 | 673 | // | glibc guard page | - guard, attached Java thread usually has |
aoqi@1 | 674 | // | |/ 1 page glibc guard. |
aoqi@1 | 675 | // P1 +------------------------+ Thread::stack_base() - Thread::stack_size() |
aoqi@1 | 676 | // | |\ |
aoqi@1 | 677 | // | HotSpot Guard Pages | - red and yellow pages |
aoqi@1 | 678 | // | |/ |
aoqi@1 | 679 | // +------------------------+ JavaThread::stack_yellow_zone_base() |
aoqi@1 | 680 | // | |\ |
aoqi@1 | 681 | // | Normal Stack | - |
aoqi@1 | 682 | // | |/ |
aoqi@1 | 683 | // P2 +------------------------+ Thread::stack_base() |
aoqi@1 | 684 | // |
aoqi@1 | 685 | // Non-Java thread: |
aoqi@1 | 686 | // |
aoqi@1 | 687 | // Low memory addresses |
aoqi@1 | 688 | // +------------------------+ |
aoqi@1 | 689 | // | |\ |
aoqi@1 | 690 | // | glibc guard page | - usually 1 page |
aoqi@1 | 691 | // | |/ |
aoqi@1 | 692 | // P1 +------------------------+ Thread::stack_base() - Thread::stack_size() |
aoqi@1 | 693 | // | |\ |
aoqi@1 | 694 | // | Normal Stack | - |
aoqi@1 | 695 | // | |/ |
aoqi@1 | 696 | // P2 +------------------------+ Thread::stack_base() |
aoqi@1 | 697 | // |
aoqi@1 | 698 | // ** P1 (aka bottom) and size ( P2 = P1 - size) are the address and stack size returned from |
aoqi@1 | 699 | // pthread_attr_getstack() |
aoqi@1 | 700 | |
aoqi@1 | 701 | static void current_stack_region(address * bottom, size_t * size) { |
aoqi@1 | 702 | if (os::Linux::is_initial_thread()) { |
aoqi@1 | 703 | // initial thread needs special handling because pthread_getattr_np() |
aoqi@1 | 704 | // may return bogus value. |
aoqi@1 | 705 | *bottom = os::Linux::initial_thread_stack_bottom(); |
aoqi@1 | 706 | *size = os::Linux::initial_thread_stack_size(); |
aoqi@1 | 707 | } else { |
aoqi@1 | 708 | pthread_attr_t attr; |
aoqi@1 | 709 | |
aoqi@1 | 710 | int rslt = pthread_getattr_np(pthread_self(), &attr); |
aoqi@1 | 711 | |
aoqi@1 | 712 | // JVM needs to know exact stack location, abort if it fails |
aoqi@1 | 713 | if (rslt != 0) { |
aoqi@1 | 714 | if (rslt == ENOMEM) { |
aoqi@1 | 715 | vm_exit_out_of_memory(0, OOM_MMAP_ERROR, "pthread_getattr_np"); |
aoqi@1 | 716 | } else { |
aoqi@1 | 717 | fatal(err_msg("pthread_getattr_np failed with errno = %d", rslt)); |
aoqi@1 | 718 | } |
aoqi@1 | 719 | } |
aoqi@1 | 720 | |
aoqi@1 | 721 | if (pthread_attr_getstack(&attr, (void **)bottom, size) != 0 ) { |
aoqi@1 | 722 | fatal("Can not locate current stack attributes!"); |
aoqi@1 | 723 | } |
aoqi@1 | 724 | /* |
aoqi@1 | 725 | void * top; |
aoqi@1 | 726 | if (pthread_attr_getstackaddr(&attr, &top) != 0 || |
aoqi@1 | 727 | pthread_attr_getstacksize(&attr, size) != 0) { |
aoqi@1 | 728 | fatal("Can not locate current stack attributes!"); |
aoqi@1 | 729 | } |
aoqi@1 | 730 | */ |
aoqi@1 | 731 | pthread_attr_destroy(&attr); |
aoqi@1 | 732 | |
aoqi@1 | 733 | //*bottom = (address) align_size_up((uintptr_t)top - *size, os::Linux::page_size()); |
aoqi@1 | 734 | //*size = (address)top - *bottom; |
aoqi@1 | 735 | } |
aoqi@1 | 736 | assert(os::current_stack_pointer() >= *bottom && |
aoqi@1 | 737 | os::current_stack_pointer() < *bottom + *size, "just checking"); |
aoqi@1 | 738 | } |
aoqi@1 | 739 | |
aoqi@1 | 740 | address os::current_stack_base() { |
aoqi@1 | 741 | address bottom; |
aoqi@1 | 742 | size_t size; |
aoqi@1 | 743 | current_stack_region(&bottom, &size); |
aoqi@1 | 744 | return (bottom + size); |
aoqi@1 | 745 | } |
aoqi@1 | 746 | |
aoqi@1 | 747 | size_t os::current_stack_size() { |
aoqi@1 | 748 | // stack size includes normal stack and HotSpot guard pages |
aoqi@1 | 749 | address bottom; |
aoqi@1 | 750 | size_t size; |
aoqi@1 | 751 | current_stack_region(&bottom, &size); |
aoqi@1 | 752 | return size; |
aoqi@1 | 753 | } |
aoqi@1 | 754 | |
aoqi@1 | 755 | ///////////////////////////////////////////////////////////////////////////// |
aoqi@1 | 756 | // helper functions for fatal error handler |
aoqi@1 | 757 | void os::print_register_info(outputStream *st, void *context) { |
aoqi@1 | 758 | if (context == NULL) return; |
aoqi@1 | 759 | |
aoqi@1 | 760 | ucontext_t *uc = (ucontext_t*)context; |
aoqi@1 | 761 | |
aoqi@1 | 762 | st->print_cr("Register to memory mapping:"); |
aoqi@1 | 763 | st->cr(); |
aoqi@1 | 764 | // this is horrendously verbose but the layout of the registers in the |
aoqi@1 | 765 | // // context does not match how we defined our abstract Register set, so |
aoqi@1 | 766 | // // we can't just iterate through the gregs area |
aoqi@1 | 767 | // |
aoqi@1 | 768 | // // this is only for the "general purpose" registers |
aoqi@1 | 769 | st->print("R0=" ); print_location(st, uc->uc_mcontext.gregs[0]); |
aoqi@1 | 770 | st->print("AT=" ); print_location(st, uc->uc_mcontext.gregs[1]); |
aoqi@1 | 771 | st->print("V0=" ); print_location(st, uc->uc_mcontext.gregs[2]); |
aoqi@1 | 772 | st->print("V1=" ); print_location(st, uc->uc_mcontext.gregs[3]); |
aoqi@1 | 773 | st->cr(); |
aoqi@1 | 774 | st->print("A0=" ); print_location(st, uc->uc_mcontext.gregs[4]); |
aoqi@1 | 775 | st->print("A1=" ); print_location(st, uc->uc_mcontext.gregs[5]); |
aoqi@1 | 776 | st->print("A2=" ); print_location(st, uc->uc_mcontext.gregs[6]); |
aoqi@1 | 777 | st->print("A3=" ); print_location(st, uc->uc_mcontext.gregs[7]); |
aoqi@1 | 778 | st->cr(); |
aoqi@1 | 779 | st->print("A4=" ); print_location(st, uc->uc_mcontext.gregs[8]); |
aoqi@1 | 780 | st->print("A5=" ); print_location(st, uc->uc_mcontext.gregs[9]); |
aoqi@1 | 781 | st->print("A6=" ); print_location(st, uc->uc_mcontext.gregs[10]); |
aoqi@1 | 782 | st->print("A7=" ); print_location(st, uc->uc_mcontext.gregs[11]); |
aoqi@1 | 783 | st->cr(); |
aoqi@1 | 784 | st->print("T0=" ); print_location(st, uc->uc_mcontext.gregs[12]); |
aoqi@1 | 785 | st->print("T1=" ); print_location(st, uc->uc_mcontext.gregs[13]); |
aoqi@1 | 786 | st->print("T2=" ); print_location(st, uc->uc_mcontext.gregs[14]); |
aoqi@1 | 787 | st->print("T3=" ); print_location(st, uc->uc_mcontext.gregs[15]); |
aoqi@1 | 788 | st->cr(); |
aoqi@1 | 789 | st->print("S0=" ); print_location(st, uc->uc_mcontext.gregs[16]); |
aoqi@1 | 790 | st->print("S1=" ); print_location(st, uc->uc_mcontext.gregs[17]); |
aoqi@1 | 791 | st->print("S2=" ); print_location(st, uc->uc_mcontext.gregs[18]); |
aoqi@1 | 792 | st->print("S3=" ); print_location(st, uc->uc_mcontext.gregs[19]); |
aoqi@1 | 793 | st->cr(); |
aoqi@1 | 794 | st->print("S4=" ); print_location(st, uc->uc_mcontext.gregs[20]); |
aoqi@1 | 795 | st->print("S5=" ); print_location(st, uc->uc_mcontext.gregs[21]); |
aoqi@1 | 796 | st->print("S6=" ); print_location(st, uc->uc_mcontext.gregs[22]); |
aoqi@1 | 797 | st->print("S7=" ); print_location(st, uc->uc_mcontext.gregs[23]); |
aoqi@1 | 798 | st->cr(); |
aoqi@1 | 799 | st->print("T8=" ); print_location(st, uc->uc_mcontext.gregs[24]); |
aoqi@1 | 800 | st->print("T9=" ); print_location(st, uc->uc_mcontext.gregs[25]); |
aoqi@1 | 801 | st->print("K0=" ); print_location(st, uc->uc_mcontext.gregs[26]); |
aoqi@1 | 802 | st->print("K1=" ); print_location(st, uc->uc_mcontext.gregs[27]); |
aoqi@1 | 803 | st->cr(); |
aoqi@1 | 804 | st->print("GP=" ); print_location(st, uc->uc_mcontext.gregs[28]); |
aoqi@1 | 805 | st->print("SP=" ); print_location(st, uc->uc_mcontext.gregs[29]); |
aoqi@1 | 806 | st->print("FP=" ); print_location(st, uc->uc_mcontext.gregs[30]); |
aoqi@1 | 807 | st->print("RA=" ); print_location(st, uc->uc_mcontext.gregs[31]); |
aoqi@1 | 808 | st->cr(); |
aoqi@1 | 809 | |
aoqi@1 | 810 | } |
aoqi@1 | 811 | void os::print_context(outputStream *st, void *context) { |
aoqi@1 | 812 | if (context == NULL) return; |
aoqi@1 | 813 | |
aoqi@1 | 814 | ucontext_t *uc = (ucontext_t*)context; |
aoqi@1 | 815 | st->print_cr("Registers:"); |
aoqi@1 | 816 | st->print( "R0=" INTPTR_FORMAT, uc->uc_mcontext.gregs[0]); |
aoqi@1 | 817 | st->print(", AT=" INTPTR_FORMAT, uc->uc_mcontext.gregs[1]); |
aoqi@1 | 818 | st->print(", V0=" INTPTR_FORMAT, uc->uc_mcontext.gregs[2]); |
aoqi@1 | 819 | st->print(", V1=" INTPTR_FORMAT, uc->uc_mcontext.gregs[3]); |
aoqi@1 | 820 | st->cr(); |
aoqi@1 | 821 | st->print( "A0=" INTPTR_FORMAT, uc->uc_mcontext.gregs[4]); |
aoqi@1 | 822 | st->print(", A1=" INTPTR_FORMAT, uc->uc_mcontext.gregs[5]); |
aoqi@1 | 823 | st->print(", A2=" INTPTR_FORMAT, uc->uc_mcontext.gregs[6]); |
aoqi@1 | 824 | st->print(", A3=" INTPTR_FORMAT, uc->uc_mcontext.gregs[7]); |
aoqi@1 | 825 | st->cr(); |
aoqi@1 | 826 | st->print( "A4=" INTPTR_FORMAT, uc->uc_mcontext.gregs[8]); |
aoqi@1 | 827 | st->print(", A5=" INTPTR_FORMAT, uc->uc_mcontext.gregs[9]); |
aoqi@1 | 828 | st->print(", A6=" INTPTR_FORMAT, uc->uc_mcontext.gregs[10]); |
aoqi@1 | 829 | st->print(", A7=" INTPTR_FORMAT, uc->uc_mcontext.gregs[11]); |
aoqi@1 | 830 | st->cr(); |
aoqi@1 | 831 | st->print( "T0=" INTPTR_FORMAT, uc->uc_mcontext.gregs[12]); |
aoqi@1 | 832 | st->print(", T1=" INTPTR_FORMAT, uc->uc_mcontext.gregs[13]); |
aoqi@1 | 833 | st->print(", T2=" INTPTR_FORMAT, uc->uc_mcontext.gregs[14]); |
aoqi@1 | 834 | st->print(", T3=" INTPTR_FORMAT, uc->uc_mcontext.gregs[15]); |
aoqi@1 | 835 | st->cr(); |
aoqi@1 | 836 | st->print( "S0=" INTPTR_FORMAT, uc->uc_mcontext.gregs[16]); |
aoqi@1 | 837 | st->print(", S1=" INTPTR_FORMAT, uc->uc_mcontext.gregs[17]); |
aoqi@1 | 838 | st->print(", S2=" INTPTR_FORMAT, uc->uc_mcontext.gregs[18]); |
aoqi@1 | 839 | st->print(", S3=" INTPTR_FORMAT, uc->uc_mcontext.gregs[19]); |
aoqi@1 | 840 | st->cr(); |
aoqi@1 | 841 | st->print( "S4=" INTPTR_FORMAT, uc->uc_mcontext.gregs[20]); |
aoqi@1 | 842 | st->print(", S5=" INTPTR_FORMAT, uc->uc_mcontext.gregs[21]); |
aoqi@1 | 843 | st->print(", S6=" INTPTR_FORMAT, uc->uc_mcontext.gregs[22]); |
aoqi@1 | 844 | st->print(", S7=" INTPTR_FORMAT, uc->uc_mcontext.gregs[23]); |
aoqi@1 | 845 | st->cr(); |
aoqi@1 | 846 | st->print( "T8=" INTPTR_FORMAT, uc->uc_mcontext.gregs[24]); |
aoqi@1 | 847 | st->print(", T9=" INTPTR_FORMAT, uc->uc_mcontext.gregs[25]); |
aoqi@1 | 848 | st->print(", K0=" INTPTR_FORMAT, uc->uc_mcontext.gregs[26]); |
aoqi@1 | 849 | st->print(", K1=" INTPTR_FORMAT, uc->uc_mcontext.gregs[27]); |
aoqi@1 | 850 | st->cr(); |
aoqi@1 | 851 | st->print( "GP=" INTPTR_FORMAT, uc->uc_mcontext.gregs[28]); |
aoqi@1 | 852 | st->print(", SP=" INTPTR_FORMAT, uc->uc_mcontext.gregs[29]); |
aoqi@1 | 853 | st->print(", FP=" INTPTR_FORMAT, uc->uc_mcontext.gregs[30]); |
aoqi@1 | 854 | st->print(", RA=" INTPTR_FORMAT, uc->uc_mcontext.gregs[31]); |
aoqi@1 | 855 | st->cr(); |
aoqi@1 | 856 | st->cr(); |
aoqi@1 | 857 | |
aoqi@1 | 858 | intptr_t *sp = (intptr_t *)os::Linux::ucontext_get_sp(uc); |
aoqi@1 | 859 | st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp); |
aoqi@1 | 860 | //print_hex_dump(st, (address)sp, (address)(sp + 8*sizeof(intptr_t)), sizeof(intptr_t)); |
aoqi@1 | 861 | print_hex_dump(st, (address)sp-32, (address)(sp + 32), sizeof(intptr_t)); |
aoqi@1 | 862 | st->cr(); |
aoqi@1 | 863 | |
aoqi@1 | 864 | // Note: it may be unsafe to inspect memory near pc. For example, pc may |
aoqi@1 | 865 | // point to garbage if entry point in an nmethod is corrupted. Leave |
aoqi@1 | 866 | // this at the end, and hope for the best. |
aoqi@1 | 867 | address pc = os::Linux::ucontext_get_pc(uc); |
aoqi@1 | 868 | st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc); |
aoqi@1 | 869 | print_hex_dump(st, pc - 64, pc + 64, sizeof(char)); |
aoqi@1 | 870 | Disassembler::decode(pc - 80, pc + 80, st); |
aoqi@1 | 871 | } |
aoqi@1 | 872 | |
aoqi@1 | 873 | #ifndef PRODUCT |
aoqi@1 | 874 | void os::verify_stack_alignment() { |
aoqi@1 | 875 | assert(((intptr_t)os::current_stack_pointer() & (StackAlignmentInBytes-1)) == 0, "incorrect stack alignment"); |
aoqi@1 | 876 | } |
aoqi@1 | 877 | #endif |
aoqi@1 | 878 |