Thu, 27 May 2010 19:08:38 -0700
6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
phh@568 | 1 | /* |
trims@1907 | 2 | * Copyright (c) 1999, 2008, Oracle and/or its affiliates. All rights reserved. |
phh@568 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
phh@568 | 4 | * |
phh@568 | 5 | * This code is free software; you can redistribute it and/or modify it |
phh@568 | 6 | * under the terms of the GNU General Public License version 2 only, as |
phh@568 | 7 | * published by the Free Software Foundation. |
phh@568 | 8 | * |
phh@568 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
phh@568 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
phh@568 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
phh@568 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
phh@568 | 13 | * accompanied this code). |
phh@568 | 14 | * |
phh@568 | 15 | * You should have received a copy of the GNU General Public License version |
phh@568 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
phh@568 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
phh@568 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
phh@568 | 22 | * |
phh@568 | 23 | */ |
phh@568 | 24 | |
phh@568 | 25 | // do not include precompiled header file |
phh@568 | 26 | |
phh@568 | 27 | #include "incls/_os_linux_sparc.cpp.incl" |
phh@568 | 28 | |
phh@568 | 29 | // Linux/Sparc has rather obscure naming of registers in sigcontext |
phh@568 | 30 | // different between 32 and 64 bits |
phh@568 | 31 | #ifdef _LP64 |
phh@568 | 32 | #define SIG_PC(x) ((x)->sigc_regs.tpc) |
phh@568 | 33 | #define SIG_NPC(x) ((x)->sigc_regs.tnpc) |
phh@568 | 34 | #define SIG_REGS(x) ((x)->sigc_regs) |
phh@568 | 35 | #else |
phh@568 | 36 | #define SIG_PC(x) ((x)->si_regs.pc) |
phh@568 | 37 | #define SIG_NPC(x) ((x)->si_regs.npc) |
phh@568 | 38 | #define SIG_REGS(x) ((x)->si_regs) |
phh@568 | 39 | #endif |
phh@568 | 40 | |
phh@568 | 41 | // those are to reference registers in sigcontext |
phh@568 | 42 | enum { |
phh@568 | 43 | CON_G0 = 0, |
phh@568 | 44 | CON_G1, |
phh@568 | 45 | CON_G2, |
phh@568 | 46 | CON_G3, |
phh@568 | 47 | CON_G4, |
phh@568 | 48 | CON_G5, |
phh@568 | 49 | CON_G6, |
phh@568 | 50 | CON_G7, |
phh@568 | 51 | CON_O0, |
phh@568 | 52 | CON_O1, |
phh@568 | 53 | CON_O2, |
phh@568 | 54 | CON_O3, |
phh@568 | 55 | CON_O4, |
phh@568 | 56 | CON_O5, |
phh@568 | 57 | CON_O6, |
phh@568 | 58 | CON_O7, |
phh@568 | 59 | }; |
phh@568 | 60 | |
phh@568 | 61 | static inline void set_cont_address(sigcontext* ctx, address addr) { |
phh@568 | 62 | SIG_PC(ctx) = (intptr_t)addr; |
phh@568 | 63 | SIG_NPC(ctx) = (intptr_t)(addr+4); |
phh@568 | 64 | } |
phh@568 | 65 | |
phh@568 | 66 | // For Forte Analyzer AsyncGetCallTrace profiling support - thread is |
phh@568 | 67 | // currently interrupted by SIGPROF. |
phh@568 | 68 | // os::Solaris::fetch_frame_from_ucontext() tries to skip nested |
phh@568 | 69 | // signal frames. Currently we don't do that on Linux, so it's the |
phh@568 | 70 | // same as os::fetch_frame_from_context(). |
phh@568 | 71 | ExtendedPC os::Linux::fetch_frame_from_ucontext(Thread* thread, |
phh@568 | 72 | ucontext_t* uc, |
phh@568 | 73 | intptr_t** ret_sp, |
phh@568 | 74 | intptr_t** ret_fp) { |
phh@568 | 75 | assert(thread != NULL, "just checking"); |
phh@568 | 76 | assert(ret_sp != NULL, "just checking"); |
phh@568 | 77 | assert(ret_fp != NULL, "just checking"); |
phh@568 | 78 | |
phh@568 | 79 | return os::fetch_frame_from_context(uc, ret_sp, ret_fp); |
phh@568 | 80 | } |
phh@568 | 81 | |
phh@568 | 82 | ExtendedPC os::fetch_frame_from_context(void* ucVoid, |
phh@568 | 83 | intptr_t** ret_sp, |
phh@568 | 84 | intptr_t** ret_fp) { |
phh@568 | 85 | ucontext_t* uc = (ucontext_t*) ucVoid; |
phh@568 | 86 | ExtendedPC epc; |
phh@568 | 87 | |
phh@568 | 88 | if (uc != NULL) { |
phh@568 | 89 | epc = ExtendedPC(os::Linux::ucontext_get_pc(uc)); |
phh@568 | 90 | if (ret_sp) { |
phh@568 | 91 | *ret_sp = os::Linux::ucontext_get_sp(uc); |
phh@568 | 92 | } |
phh@568 | 93 | if (ret_fp) { |
phh@568 | 94 | *ret_fp = os::Linux::ucontext_get_fp(uc); |
phh@568 | 95 | } |
phh@568 | 96 | } else { |
phh@568 | 97 | // construct empty ExtendedPC for return value checking |
phh@568 | 98 | epc = ExtendedPC(NULL); |
phh@568 | 99 | if (ret_sp) { |
phh@568 | 100 | *ret_sp = (intptr_t*) NULL; |
phh@568 | 101 | } |
phh@568 | 102 | if (ret_fp) { |
phh@568 | 103 | *ret_fp = (intptr_t*) NULL; |
phh@568 | 104 | } |
phh@568 | 105 | } |
phh@568 | 106 | |
phh@568 | 107 | return epc; |
phh@568 | 108 | } |
phh@568 | 109 | |
phh@568 | 110 | frame os::fetch_frame_from_context(void* ucVoid) { |
phh@568 | 111 | intptr_t* sp; |
phh@568 | 112 | intptr_t* fp; |
phh@568 | 113 | ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp); |
phh@568 | 114 | return frame(sp, fp, epc.pc()); |
phh@568 | 115 | } |
phh@568 | 116 | |
phh@568 | 117 | frame os::get_sender_for_C_frame(frame* fr) { |
phh@568 | 118 | return frame(fr->sender_sp(), fr->link(), fr->sender_pc()); |
phh@568 | 119 | } |
phh@568 | 120 | |
phh@568 | 121 | frame os::current_frame() { |
phh@568 | 122 | fprintf(stderr, "current_frame()"); |
phh@568 | 123 | |
phh@568 | 124 | intptr_t* sp = StubRoutines::Sparc::flush_callers_register_windows_func()(); |
phh@568 | 125 | frame myframe(sp, frame::unpatchable, |
phh@568 | 126 | CAST_FROM_FN_PTR(address, os::current_frame)); |
phh@568 | 127 | if (os::is_first_C_frame(&myframe)) { |
phh@568 | 128 | // stack is not walkable |
phh@568 | 129 | return frame(NULL, frame::unpatchable, NULL); |
phh@568 | 130 | } else { |
phh@568 | 131 | return os::get_sender_for_C_frame(&myframe); |
phh@568 | 132 | } |
phh@568 | 133 | } |
phh@568 | 134 | |
phh@568 | 135 | address os::current_stack_pointer() { |
phh@568 | 136 | register void *sp __asm__ ("sp"); |
phh@568 | 137 | return (address)sp; |
phh@568 | 138 | } |
phh@568 | 139 | |
phh@568 | 140 | static void current_stack_region(address* bottom, size_t* size) { |
phh@568 | 141 | if (os::Linux::is_initial_thread()) { |
phh@568 | 142 | // initial thread needs special handling because pthread_getattr_np() |
phh@568 | 143 | // may return bogus value. |
phh@568 | 144 | *bottom = os::Linux::initial_thread_stack_bottom(); |
phh@568 | 145 | *size = os::Linux::initial_thread_stack_size(); |
phh@568 | 146 | } else { |
phh@568 | 147 | pthread_attr_t attr; |
phh@568 | 148 | |
phh@568 | 149 | int rslt = pthread_getattr_np(pthread_self(), &attr); |
phh@568 | 150 | |
phh@568 | 151 | // JVM needs to know exact stack location, abort if it fails |
phh@568 | 152 | if (rslt != 0) { |
phh@568 | 153 | if (rslt == ENOMEM) { |
phh@568 | 154 | vm_exit_out_of_memory(0, "pthread_getattr_np"); |
phh@568 | 155 | } else { |
jcoomes@1845 | 156 | fatal(err_msg("pthread_getattr_np failed with errno = %d", rslt)); |
phh@568 | 157 | } |
phh@568 | 158 | } |
phh@568 | 159 | |
phh@568 | 160 | if (pthread_attr_getstack(&attr, (void**)bottom, size) != 0) { |
phh@568 | 161 | fatal("Can not locate current stack attributes!"); |
phh@568 | 162 | } |
phh@568 | 163 | |
phh@568 | 164 | pthread_attr_destroy(&attr); |
phh@568 | 165 | } |
phh@568 | 166 | assert(os::current_stack_pointer() >= *bottom && |
phh@568 | 167 | os::current_stack_pointer() < *bottom + *size, "just checking"); |
phh@568 | 168 | } |
phh@568 | 169 | |
phh@568 | 170 | address os::current_stack_base() { |
phh@568 | 171 | address bottom; |
phh@568 | 172 | size_t size; |
phh@568 | 173 | current_stack_region(&bottom, &size); |
phh@568 | 174 | return bottom + size; |
phh@568 | 175 | } |
phh@568 | 176 | |
phh@568 | 177 | size_t os::current_stack_size() { |
phh@568 | 178 | // stack size includes normal stack and HotSpot guard pages |
phh@568 | 179 | address bottom; |
phh@568 | 180 | size_t size; |
phh@568 | 181 | current_stack_region(&bottom, &size); |
phh@568 | 182 | return size; |
phh@568 | 183 | } |
phh@568 | 184 | |
phh@568 | 185 | char* os::non_memory_address_word() { |
phh@568 | 186 | // Must never look like an address returned by reserve_memory, |
phh@568 | 187 | // even in its subfields (as defined by the CPU immediate fields, |
phh@568 | 188 | // if the CPU splits constants across multiple instructions). |
phh@568 | 189 | // On SPARC, 0 != %hi(any real address), because there is no |
phh@568 | 190 | // allocation in the first 1Kb of the virtual address space. |
phh@568 | 191 | return (char*) 0; |
phh@568 | 192 | } |
phh@568 | 193 | |
phh@568 | 194 | void os::initialize_thread() {} |
phh@568 | 195 | |
phh@568 | 196 | void os::print_context(outputStream *st, void *context) { |
phh@568 | 197 | if (context == NULL) return; |
phh@568 | 198 | |
phh@568 | 199 | ucontext_t* uc = (ucontext_t*)context; |
phh@568 | 200 | sigcontext* sc = (sigcontext*)context; |
phh@568 | 201 | st->print_cr("Registers:"); |
phh@568 | 202 | |
phh@568 | 203 | st->print_cr(" O0=" INTPTR_FORMAT " O1=" INTPTR_FORMAT |
phh@568 | 204 | " O2=" INTPTR_FORMAT " O3=" INTPTR_FORMAT, |
phh@568 | 205 | SIG_REGS(sc).u_regs[CON_O0], |
phh@568 | 206 | SIG_REGS(sc).u_regs[CON_O1], |
phh@568 | 207 | SIG_REGS(sc).u_regs[CON_O2], |
phh@568 | 208 | SIG_REGS(sc).u_regs[CON_O3]); |
phh@568 | 209 | st->print_cr(" O4=" INTPTR_FORMAT " O5=" INTPTR_FORMAT |
phh@568 | 210 | " O6=" INTPTR_FORMAT " O7=" INTPTR_FORMAT, |
phh@568 | 211 | SIG_REGS(sc).u_regs[CON_O4], |
phh@568 | 212 | SIG_REGS(sc).u_regs[CON_O5], |
phh@568 | 213 | SIG_REGS(sc).u_regs[CON_O6], |
phh@568 | 214 | SIG_REGS(sc).u_regs[CON_O7]); |
phh@568 | 215 | |
phh@568 | 216 | st->print_cr(" G1=" INTPTR_FORMAT " G2=" INTPTR_FORMAT |
phh@568 | 217 | " G3=" INTPTR_FORMAT " G4=" INTPTR_FORMAT, |
phh@568 | 218 | SIG_REGS(sc).u_regs[CON_G1], |
phh@568 | 219 | SIG_REGS(sc).u_regs[CON_G2], |
phh@568 | 220 | SIG_REGS(sc).u_regs[CON_G3], |
phh@568 | 221 | SIG_REGS(sc).u_regs[CON_G4]); |
phh@568 | 222 | st->print_cr(" G5=" INTPTR_FORMAT " G6=" INTPTR_FORMAT |
phh@568 | 223 | " G7=" INTPTR_FORMAT " Y=" INTPTR_FORMAT, |
phh@568 | 224 | SIG_REGS(sc).u_regs[CON_G5], |
phh@568 | 225 | SIG_REGS(sc).u_regs[CON_G6], |
phh@568 | 226 | SIG_REGS(sc).u_regs[CON_G7], |
phh@568 | 227 | SIG_REGS(sc).y); |
phh@568 | 228 | |
phh@568 | 229 | st->print_cr(" PC=" INTPTR_FORMAT " nPC=" INTPTR_FORMAT, |
phh@568 | 230 | SIG_PC(sc), |
phh@568 | 231 | SIG_NPC(sc)); |
phh@568 | 232 | st->cr(); |
phh@568 | 233 | st->cr(); |
phh@568 | 234 | |
phh@568 | 235 | intptr_t *sp = (intptr_t *)os::Linux::ucontext_get_sp(uc); |
phh@568 | 236 | st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp); |
phh@568 | 237 | print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t)); |
phh@568 | 238 | st->cr(); |
phh@568 | 239 | |
phh@568 | 240 | // Note: it may be unsafe to inspect memory near pc. For example, pc may |
phh@568 | 241 | // point to garbage if entry point in an nmethod is corrupted. Leave |
phh@568 | 242 | // this at the end, and hope for the best. |
phh@568 | 243 | address pc = os::Linux::ucontext_get_pc(uc); |
phh@568 | 244 | st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc); |
phh@568 | 245 | print_hex_dump(st, pc - 16, pc + 16, sizeof(char)); |
phh@568 | 246 | } |
phh@568 | 247 | |
phh@568 | 248 | |
phh@568 | 249 | address os::Linux::ucontext_get_pc(ucontext_t* uc) { |
phh@568 | 250 | return (address) SIG_PC((sigcontext*)uc); |
phh@568 | 251 | } |
phh@568 | 252 | |
phh@568 | 253 | intptr_t* os::Linux::ucontext_get_sp(ucontext_t *uc) { |
phh@568 | 254 | return (intptr_t*) |
phh@568 | 255 | ((intptr_t)SIG_REGS((sigcontext*)uc).u_regs[CON_O6] + STACK_BIAS); |
phh@568 | 256 | } |
phh@568 | 257 | |
phh@568 | 258 | // not used on Sparc |
phh@568 | 259 | intptr_t* os::Linux::ucontext_get_fp(ucontext_t *uc) { |
phh@568 | 260 | ShouldNotReachHere(); |
phh@568 | 261 | return NULL; |
phh@568 | 262 | } |
phh@568 | 263 | |
phh@568 | 264 | // Utility functions |
phh@568 | 265 | |
phh@568 | 266 | extern "C" void Fetch32PFI(); |
phh@568 | 267 | extern "C" void Fetch32Resume(); |
phh@568 | 268 | extern "C" void FetchNPFI(); |
phh@568 | 269 | extern "C" void FetchNResume(); |
phh@568 | 270 | |
phh@568 | 271 | inline static bool checkPrefetch(sigcontext* uc, address pc) { |
phh@568 | 272 | if (pc == (address) Fetch32PFI) { |
phh@568 | 273 | set_cont_address(uc, address(Fetch32Resume)); |
phh@568 | 274 | return true; |
phh@568 | 275 | } |
phh@568 | 276 | if (pc == (address) FetchNPFI) { |
phh@568 | 277 | set_cont_address(uc, address(FetchNResume)); |
phh@568 | 278 | return true; |
phh@568 | 279 | } |
phh@568 | 280 | return false; |
phh@568 | 281 | } |
phh@568 | 282 | |
phh@568 | 283 | inline static bool checkOverflow(sigcontext* uc, |
phh@568 | 284 | address pc, |
phh@568 | 285 | address addr, |
phh@568 | 286 | JavaThread* thread, |
phh@568 | 287 | address* stub) { |
phh@568 | 288 | // check if fault address is within thread stack |
phh@568 | 289 | if (addr < thread->stack_base() && |
phh@568 | 290 | addr >= thread->stack_base() - thread->stack_size()) { |
phh@568 | 291 | // stack overflow |
phh@568 | 292 | if (thread->in_stack_yellow_zone(addr)) { |
phh@568 | 293 | thread->disable_stack_yellow_zone(); |
phh@568 | 294 | if (thread->thread_state() == _thread_in_Java) { |
phh@568 | 295 | // Throw a stack overflow exception. Guard pages will be reenabled |
phh@568 | 296 | // while unwinding the stack. |
phh@568 | 297 | *stub = |
phh@568 | 298 | SharedRuntime::continuation_for_implicit_exception(thread, |
phh@568 | 299 | pc, |
phh@568 | 300 | SharedRuntime::STACK_OVERFLOW); |
phh@568 | 301 | } else { |
phh@568 | 302 | // Thread was in the vm or native code. Return and try to finish. |
phh@568 | 303 | return true; |
phh@568 | 304 | } |
phh@568 | 305 | } else if (thread->in_stack_red_zone(addr)) { |
phh@568 | 306 | // Fatal red zone violation. Disable the guard pages and fall through |
phh@568 | 307 | // to handle_unexpected_exception way down below. |
phh@568 | 308 | thread->disable_stack_red_zone(); |
phh@568 | 309 | tty->print_raw_cr("An irrecoverable stack overflow has occurred."); |
phh@568 | 310 | } else { |
phh@568 | 311 | // Accessing stack address below sp may cause SEGV if current |
phh@568 | 312 | // thread has MAP_GROWSDOWN stack. This should only happen when |
phh@568 | 313 | // current thread was created by user code with MAP_GROWSDOWN flag |
phh@568 | 314 | // and then attached to VM. See notes in os_linux.cpp. |
phh@568 | 315 | if (thread->osthread()->expanding_stack() == 0) { |
phh@568 | 316 | thread->osthread()->set_expanding_stack(); |
phh@568 | 317 | if (os::Linux::manually_expand_stack(thread, addr)) { |
phh@568 | 318 | thread->osthread()->clear_expanding_stack(); |
phh@568 | 319 | return true; |
phh@568 | 320 | } |
phh@568 | 321 | thread->osthread()->clear_expanding_stack(); |
phh@568 | 322 | } else { |
phh@568 | 323 | fatal("recursive segv. expanding stack."); |
phh@568 | 324 | } |
phh@568 | 325 | } |
phh@568 | 326 | } |
phh@568 | 327 | return false; |
phh@568 | 328 | } |
phh@568 | 329 | |
phh@568 | 330 | inline static bool checkPollingPage(address pc, address fault, address* stub) { |
phh@568 | 331 | if (fault == os::get_polling_page()) { |
phh@568 | 332 | *stub = SharedRuntime::get_poll_stub(pc); |
phh@568 | 333 | return true; |
phh@568 | 334 | } |
phh@568 | 335 | return false; |
phh@568 | 336 | } |
phh@568 | 337 | |
phh@568 | 338 | inline static bool checkByteBuffer(address pc, address* stub) { |
phh@568 | 339 | // BugId 4454115: A read from a MappedByteBuffer can fault |
phh@568 | 340 | // here if the underlying file has been truncated. |
phh@568 | 341 | // Do not crash the VM in such a case. |
phh@568 | 342 | CodeBlob* cb = CodeCache::find_blob_unsafe(pc); |
phh@568 | 343 | nmethod* nm = cb->is_nmethod() ? (nmethod*)cb : NULL; |
phh@568 | 344 | if (nm != NULL && nm->has_unsafe_access()) { |
phh@568 | 345 | *stub = StubRoutines::handler_for_unsafe_access(); |
phh@568 | 346 | return true; |
phh@568 | 347 | } |
phh@568 | 348 | return false; |
phh@568 | 349 | } |
phh@568 | 350 | |
phh@568 | 351 | inline static bool checkVerifyOops(address pc, address fault, address* stub) { |
phh@568 | 352 | if (pc >= MacroAssembler::_verify_oop_implicit_branch[0] |
phh@568 | 353 | && pc < MacroAssembler::_verify_oop_implicit_branch[1] ) { |
phh@568 | 354 | *stub = MacroAssembler::_verify_oop_implicit_branch[2]; |
phh@568 | 355 | warning("fixed up memory fault in +VerifyOops at address " |
phh@568 | 356 | INTPTR_FORMAT, fault); |
phh@568 | 357 | return true; |
phh@568 | 358 | } |
phh@568 | 359 | return false; |
phh@568 | 360 | } |
phh@568 | 361 | |
phh@568 | 362 | inline static bool checkFPFault(address pc, int code, |
phh@568 | 363 | JavaThread* thread, address* stub) { |
phh@568 | 364 | if (code == FPE_INTDIV || code == FPE_FLTDIV) { |
phh@568 | 365 | *stub = |
phh@568 | 366 | SharedRuntime:: |
phh@568 | 367 | continuation_for_implicit_exception(thread, |
phh@568 | 368 | pc, |
phh@568 | 369 | SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); |
phh@568 | 370 | return true; |
phh@568 | 371 | } |
phh@568 | 372 | return false; |
phh@568 | 373 | } |
phh@568 | 374 | |
phh@568 | 375 | inline static bool checkNullPointer(address pc, intptr_t fault, |
phh@568 | 376 | JavaThread* thread, address* stub) { |
phh@568 | 377 | if (!MacroAssembler::needs_explicit_null_check(fault)) { |
phh@568 | 378 | // Determination of interpreter/vtable stub/compiled code null |
phh@568 | 379 | // exception |
phh@568 | 380 | *stub = |
phh@568 | 381 | SharedRuntime:: |
phh@568 | 382 | continuation_for_implicit_exception(thread, pc, |
phh@568 | 383 | SharedRuntime::IMPLICIT_NULL); |
phh@568 | 384 | return true; |
phh@568 | 385 | } |
phh@568 | 386 | return false; |
phh@568 | 387 | } |
phh@568 | 388 | |
phh@568 | 389 | inline static bool checkFastJNIAccess(address pc, address* stub) { |
phh@568 | 390 | address addr = JNI_FastGetField::find_slowcase_pc(pc); |
phh@568 | 391 | if (addr != (address)-1) { |
phh@568 | 392 | *stub = addr; |
phh@568 | 393 | return true; |
phh@568 | 394 | } |
phh@568 | 395 | return false; |
phh@568 | 396 | } |
phh@568 | 397 | |
phh@568 | 398 | inline static bool checkSerializePage(JavaThread* thread, address addr) { |
phh@568 | 399 | return os::is_memory_serialize_page(thread, addr); |
phh@568 | 400 | } |
phh@568 | 401 | |
phh@568 | 402 | inline static bool checkZombie(sigcontext* uc, address* pc, address* stub) { |
phh@568 | 403 | if (nativeInstruction_at(*pc)->is_zombie()) { |
phh@568 | 404 | // zombie method (ld [%g0],%o7 instruction) |
phh@568 | 405 | *stub = SharedRuntime::get_handle_wrong_method_stub(); |
phh@568 | 406 | |
phh@568 | 407 | // At the stub it needs to look like a call from the caller of this |
phh@568 | 408 | // method (not a call from the segv site). |
phh@568 | 409 | *pc = (address)SIG_REGS(uc).u_regs[CON_O7]; |
phh@568 | 410 | return true; |
phh@568 | 411 | } |
phh@568 | 412 | return false; |
phh@568 | 413 | } |
phh@568 | 414 | |
phh@568 | 415 | inline static bool checkICMiss(sigcontext* uc, address* pc, address* stub) { |
phh@568 | 416 | #ifdef COMPILER2 |
phh@568 | 417 | if (nativeInstruction_at(*pc)->is_ic_miss_trap()) { |
phh@568 | 418 | #ifdef ASSERT |
phh@568 | 419 | #ifdef TIERED |
phh@568 | 420 | CodeBlob* cb = CodeCache::find_blob_unsafe(pc); |
phh@568 | 421 | assert(cb->is_compiled_by_c2(), "Wrong compiler"); |
phh@568 | 422 | #endif // TIERED |
phh@568 | 423 | #endif // ASSERT |
phh@568 | 424 | // Inline cache missed and user trap "Tne G0+ST_RESERVED_FOR_USER_0+2" taken. |
phh@568 | 425 | *stub = SharedRuntime::get_ic_miss_stub(); |
phh@568 | 426 | // At the stub it needs to look like a call from the caller of this |
phh@568 | 427 | // method (not a call from the segv site). |
phh@568 | 428 | *pc = (address)SIG_REGS(uc).u_regs[CON_O7]; |
phh@568 | 429 | return true; |
phh@568 | 430 | } |
phh@568 | 431 | #endif // COMPILER2 |
phh@568 | 432 | return false; |
phh@568 | 433 | } |
phh@568 | 434 | |
phh@568 | 435 | extern "C" int |
phh@568 | 436 | JVM_handle_linux_signal(int sig, |
phh@568 | 437 | siginfo_t* info, |
phh@568 | 438 | void* ucVoid, |
phh@568 | 439 | int abort_if_unrecognized) { |
phh@568 | 440 | // in fact this isn't ucontext_t* at all, but struct sigcontext* |
phh@568 | 441 | // but Linux porting layer uses ucontext_t, so to minimize code change |
phh@568 | 442 | // we cast as needed |
phh@568 | 443 | ucontext_t* ucFake = (ucontext_t*) ucVoid; |
phh@568 | 444 | sigcontext* uc = (sigcontext*)ucVoid; |
phh@568 | 445 | |
phh@568 | 446 | Thread* t = ThreadLocalStorage::get_thread_slow(); |
phh@568 | 447 | |
phh@568 | 448 | SignalHandlerMark shm(t); |
phh@568 | 449 | |
phh@568 | 450 | // Note: it's not uncommon that JNI code uses signal/sigset to install |
phh@568 | 451 | // then restore certain signal handler (e.g. to temporarily block SIGPIPE, |
phh@568 | 452 | // or have a SIGILL handler when detecting CPU type). When that happens, |
phh@568 | 453 | // JVM_handle_linux_signal() might be invoked with junk info/ucVoid. To |
phh@568 | 454 | // avoid unnecessary crash when libjsig is not preloaded, try handle signals |
phh@568 | 455 | // that do not require siginfo/ucontext first. |
phh@568 | 456 | |
phh@568 | 457 | if (sig == SIGPIPE || sig == SIGXFSZ) { |
phh@568 | 458 | // allow chained handler to go first |
phh@568 | 459 | if (os::Linux::chained_handler(sig, info, ucVoid)) { |
phh@568 | 460 | return true; |
phh@568 | 461 | } else { |
phh@568 | 462 | if (PrintMiscellaneous && (WizardMode || Verbose)) { |
phh@568 | 463 | char buf[64]; |
phh@568 | 464 | warning("Ignoring %s - see bugs 4229104 or 646499219", |
phh@568 | 465 | os::exception_name(sig, buf, sizeof(buf))); |
phh@568 | 466 | } |
phh@568 | 467 | return true; |
phh@568 | 468 | } |
phh@568 | 469 | } |
phh@568 | 470 | |
phh@568 | 471 | JavaThread* thread = NULL; |
phh@568 | 472 | VMThread* vmthread = NULL; |
phh@568 | 473 | if (os::Linux::signal_handlers_are_installed) { |
phh@568 | 474 | if (t != NULL ){ |
phh@568 | 475 | if(t->is_Java_thread()) { |
phh@568 | 476 | thread = (JavaThread*)t; |
phh@568 | 477 | } |
phh@568 | 478 | else if(t->is_VM_thread()){ |
phh@568 | 479 | vmthread = (VMThread *)t; |
phh@568 | 480 | } |
phh@568 | 481 | } |
phh@568 | 482 | } |
phh@568 | 483 | |
phh@568 | 484 | // decide if this trap can be handled by a stub |
phh@568 | 485 | address stub = NULL; |
phh@568 | 486 | address pc = NULL; |
phh@568 | 487 | address npc = NULL; |
phh@568 | 488 | |
phh@568 | 489 | //%note os_trap_1 |
phh@568 | 490 | if (info != NULL && uc != NULL && thread != NULL) { |
phh@568 | 491 | pc = address(SIG_PC(uc)); |
phh@568 | 492 | npc = address(SIG_NPC(uc)); |
phh@568 | 493 | |
phh@568 | 494 | // Check to see if we caught the safepoint code in the |
phh@568 | 495 | // process of write protecting the memory serialization page. |
phh@568 | 496 | // It write enables the page immediately after protecting it |
phh@568 | 497 | // so we can just return to retry the write. |
phh@568 | 498 | if ((sig == SIGSEGV) && checkSerializePage(thread, (address)info->si_addr)) { |
phh@568 | 499 | // Block current thread until the memory serialize page permission restored. |
phh@568 | 500 | os::block_on_serialize_page_trap(); |
phh@568 | 501 | return 1; |
phh@568 | 502 | } |
phh@568 | 503 | |
phh@568 | 504 | if (checkPrefetch(uc, pc)) { |
phh@568 | 505 | return 1; |
phh@568 | 506 | } |
phh@568 | 507 | |
phh@568 | 508 | // Handle ALL stack overflow variations here |
phh@568 | 509 | if (sig == SIGSEGV) { |
phh@568 | 510 | if (checkOverflow(uc, pc, (address)info->si_addr, thread, &stub)) { |
phh@568 | 511 | return 1; |
phh@568 | 512 | } |
phh@568 | 513 | } |
phh@568 | 514 | |
phh@568 | 515 | if (sig == SIGBUS && |
phh@568 | 516 | thread->thread_state() == _thread_in_vm && |
phh@568 | 517 | thread->doing_unsafe_access()) { |
phh@568 | 518 | stub = StubRoutines::handler_for_unsafe_access(); |
phh@568 | 519 | } |
phh@568 | 520 | |
phh@568 | 521 | if (thread->thread_state() == _thread_in_Java) { |
phh@568 | 522 | do { |
phh@568 | 523 | // Java thread running in Java code => find exception handler if any |
phh@568 | 524 | // a fault inside compiled code, the interpreter, or a stub |
phh@568 | 525 | |
phh@568 | 526 | if ((sig == SIGSEGV) && checkPollingPage(pc, (address)info->si_addr, &stub)) { |
phh@568 | 527 | break; |
phh@568 | 528 | } |
phh@568 | 529 | |
phh@568 | 530 | if ((sig == SIGBUS) && checkByteBuffer(pc, &stub)) { |
phh@568 | 531 | break; |
phh@568 | 532 | } |
phh@568 | 533 | |
phh@568 | 534 | if ((sig == SIGSEGV || sig == SIGBUS) && |
phh@568 | 535 | checkVerifyOops(pc, (address)info->si_addr, &stub)) { |
phh@568 | 536 | break; |
phh@568 | 537 | } |
phh@568 | 538 | |
phh@568 | 539 | if ((sig == SIGSEGV) && checkZombie(uc, &pc, &stub)) { |
phh@568 | 540 | break; |
phh@568 | 541 | } |
phh@568 | 542 | |
phh@568 | 543 | if ((sig == SIGILL) && checkICMiss(uc, &pc, &stub)) { |
phh@568 | 544 | break; |
phh@568 | 545 | } |
phh@568 | 546 | |
phh@568 | 547 | if ((sig == SIGFPE) && checkFPFault(pc, info->si_code, thread, &stub)) { |
phh@568 | 548 | break; |
phh@568 | 549 | } |
phh@568 | 550 | |
phh@568 | 551 | if ((sig == SIGSEGV) && |
phh@568 | 552 | checkNullPointer(pc, (intptr_t)info->si_addr, thread, &stub)) { |
phh@568 | 553 | break; |
phh@568 | 554 | } |
phh@568 | 555 | } while (0); |
phh@568 | 556 | |
phh@568 | 557 | // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in |
phh@568 | 558 | // and the heap gets shrunk before the field access. |
phh@568 | 559 | if ((sig == SIGSEGV) || (sig == SIGBUS)) { |
phh@568 | 560 | checkFastJNIAccess(pc, &stub); |
phh@568 | 561 | } |
phh@568 | 562 | } |
phh@568 | 563 | |
phh@568 | 564 | if (stub != NULL) { |
phh@568 | 565 | // save all thread context in case we need to restore it |
phh@568 | 566 | thread->set_saved_exception_pc(pc); |
phh@568 | 567 | thread->set_saved_exception_npc(npc); |
phh@568 | 568 | set_cont_address(uc, stub); |
phh@568 | 569 | return true; |
phh@568 | 570 | } |
phh@568 | 571 | } |
phh@568 | 572 | |
phh@568 | 573 | // signal-chaining |
phh@568 | 574 | if (os::Linux::chained_handler(sig, info, ucVoid)) { |
phh@568 | 575 | return true; |
phh@568 | 576 | } |
phh@568 | 577 | |
phh@568 | 578 | if (!abort_if_unrecognized) { |
phh@568 | 579 | // caller wants another chance, so give it to him |
phh@568 | 580 | return false; |
phh@568 | 581 | } |
phh@568 | 582 | |
phh@568 | 583 | if (pc == NULL && uc != NULL) { |
phh@568 | 584 | pc = os::Linux::ucontext_get_pc((ucontext_t*)uc); |
phh@568 | 585 | } |
phh@568 | 586 | |
phh@568 | 587 | // unmask current signal |
phh@568 | 588 | sigset_t newset; |
phh@568 | 589 | sigemptyset(&newset); |
phh@568 | 590 | sigaddset(&newset, sig); |
phh@568 | 591 | sigprocmask(SIG_UNBLOCK, &newset, NULL); |
phh@568 | 592 | |
phh@568 | 593 | VMError err(t, sig, pc, info, ucVoid); |
phh@568 | 594 | err.report_and_die(); |
phh@568 | 595 | |
phh@568 | 596 | ShouldNotReachHere(); |
phh@568 | 597 | } |
phh@568 | 598 | |
phh@568 | 599 | void os::Linux::init_thread_fpu_state(void) { |
phh@568 | 600 | // Nothing to do |
phh@568 | 601 | } |
phh@568 | 602 | |
phh@568 | 603 | int os::Linux::get_fpu_control_word() { |
phh@568 | 604 | return 0; |
phh@568 | 605 | } |
phh@568 | 606 | |
phh@568 | 607 | void os::Linux::set_fpu_control_word(int fpu) { |
phh@568 | 608 | // nothing |
phh@568 | 609 | } |
phh@568 | 610 | |
phh@568 | 611 | bool os::is_allocatable(size_t bytes) { |
phh@568 | 612 | #ifdef _LP64 |
phh@568 | 613 | return true; |
phh@568 | 614 | #else |
phh@568 | 615 | if (bytes < 2 * G) { |
phh@568 | 616 | return true; |
phh@568 | 617 | } |
phh@568 | 618 | |
phh@568 | 619 | char* addr = reserve_memory(bytes, NULL); |
phh@568 | 620 | |
phh@568 | 621 | if (addr != NULL) { |
phh@568 | 622 | release_memory(addr, bytes); |
phh@568 | 623 | } |
phh@568 | 624 | |
phh@568 | 625 | return addr != NULL; |
phh@568 | 626 | #endif // _LP64 |
phh@568 | 627 | } |
phh@568 | 628 | |
phh@568 | 629 | /////////////////////////////////////////////////////////////////////////////// |
phh@568 | 630 | // thread stack |
phh@568 | 631 | |
phh@568 | 632 | size_t os::Linux::min_stack_allowed = 128 * K; |
phh@568 | 633 | |
phh@568 | 634 | // pthread on Ubuntu is always in floating stack mode |
phh@568 | 635 | bool os::Linux::supports_variable_stack_size() { return true; } |
phh@568 | 636 | |
phh@568 | 637 | // return default stack size for thr_type |
phh@568 | 638 | size_t os::Linux::default_stack_size(os::ThreadType thr_type) { |
phh@568 | 639 | // default stack size (compiler thread needs larger stack) |
phh@568 | 640 | size_t s = (thr_type == os::compiler_thread ? 4 * M : 1 * M); |
phh@568 | 641 | return s; |
phh@568 | 642 | } |
phh@568 | 643 | |
phh@568 | 644 | size_t os::Linux::default_guard_size(os::ThreadType thr_type) { |
phh@568 | 645 | // Creating guard page is very expensive. Java thread has HotSpot |
phh@568 | 646 | // guard page, only enable glibc guard page for non-Java threads. |
phh@568 | 647 | return (thr_type == java_thread ? 0 : page_size()); |
phh@568 | 648 | } |