Mon, 21 Jul 2014 06:00:44 -0700
8050167: linux-sparcv9: hs_err file does not show any stack information
Summary: Fixed creation of starting stack frame for stack walking in error handler
Reviewed-by: coleenp, mikael
phh@568 | 1 | /* |
mikael@6198 | 2 | * Copyright (c) 1999, 2013, 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 | |
stefank@2314 | 25 | // no precompiled headers |
twisti@4323 | 26 | #include "asm/macroAssembler.hpp" |
stefank@2314 | 27 | #include "classfile/classLoader.hpp" |
stefank@2314 | 28 | #include "classfile/systemDictionary.hpp" |
stefank@2314 | 29 | #include "classfile/vmSymbols.hpp" |
stefank@2314 | 30 | #include "code/icBuffer.hpp" |
stefank@2314 | 31 | #include "code/vtableStubs.hpp" |
stefank@2314 | 32 | #include "interpreter/interpreter.hpp" |
stefank@2314 | 33 | #include "jvm_linux.h" |
stefank@2314 | 34 | #include "memory/allocation.inline.hpp" |
stefank@2314 | 35 | #include "mutex_linux.inline.hpp" |
stefank@2314 | 36 | #include "nativeInst_sparc.hpp" |
stefank@2314 | 37 | #include "os_share_linux.hpp" |
stefank@2314 | 38 | #include "prims/jniFastGetField.hpp" |
stefank@2314 | 39 | #include "prims/jvm.h" |
stefank@2314 | 40 | #include "prims/jvm_misc.hpp" |
stefank@2314 | 41 | #include "runtime/arguments.hpp" |
stefank@2314 | 42 | #include "runtime/extendedPC.hpp" |
stefank@2314 | 43 | #include "runtime/frame.inline.hpp" |
stefank@2314 | 44 | #include "runtime/interfaceSupport.hpp" |
stefank@2314 | 45 | #include "runtime/java.hpp" |
stefank@2314 | 46 | #include "runtime/javaCalls.hpp" |
stefank@2314 | 47 | #include "runtime/mutexLocker.hpp" |
stefank@2314 | 48 | #include "runtime/osThread.hpp" |
stefank@2314 | 49 | #include "runtime/sharedRuntime.hpp" |
stefank@2314 | 50 | #include "runtime/stubRoutines.hpp" |
stefank@4299 | 51 | #include "runtime/thread.inline.hpp" |
stefank@2314 | 52 | #include "runtime/timer.hpp" |
stefank@2314 | 53 | #include "utilities/events.hpp" |
stefank@2314 | 54 | #include "utilities/vmError.hpp" |
phh@568 | 55 | |
phh@568 | 56 | // Linux/Sparc has rather obscure naming of registers in sigcontext |
phh@568 | 57 | // different between 32 and 64 bits |
phh@568 | 58 | #ifdef _LP64 |
phh@568 | 59 | #define SIG_PC(x) ((x)->sigc_regs.tpc) |
phh@568 | 60 | #define SIG_NPC(x) ((x)->sigc_regs.tnpc) |
phh@568 | 61 | #define SIG_REGS(x) ((x)->sigc_regs) |
phh@568 | 62 | #else |
phh@568 | 63 | #define SIG_PC(x) ((x)->si_regs.pc) |
phh@568 | 64 | #define SIG_NPC(x) ((x)->si_regs.npc) |
phh@568 | 65 | #define SIG_REGS(x) ((x)->si_regs) |
phh@568 | 66 | #endif |
phh@568 | 67 | |
phh@568 | 68 | // those are to reference registers in sigcontext |
phh@568 | 69 | enum { |
phh@568 | 70 | CON_G0 = 0, |
phh@568 | 71 | CON_G1, |
phh@568 | 72 | CON_G2, |
phh@568 | 73 | CON_G3, |
phh@568 | 74 | CON_G4, |
phh@568 | 75 | CON_G5, |
phh@568 | 76 | CON_G6, |
phh@568 | 77 | CON_G7, |
phh@568 | 78 | CON_O0, |
phh@568 | 79 | CON_O1, |
phh@568 | 80 | CON_O2, |
phh@568 | 81 | CON_O3, |
phh@568 | 82 | CON_O4, |
phh@568 | 83 | CON_O5, |
phh@568 | 84 | CON_O6, |
phh@568 | 85 | CON_O7, |
phh@568 | 86 | }; |
phh@568 | 87 | |
phh@568 | 88 | static inline void set_cont_address(sigcontext* ctx, address addr) { |
phh@568 | 89 | SIG_PC(ctx) = (intptr_t)addr; |
phh@568 | 90 | SIG_NPC(ctx) = (intptr_t)(addr+4); |
phh@568 | 91 | } |
phh@568 | 92 | |
phh@568 | 93 | // For Forte Analyzer AsyncGetCallTrace profiling support - thread is |
phh@568 | 94 | // currently interrupted by SIGPROF. |
phh@568 | 95 | // os::Solaris::fetch_frame_from_ucontext() tries to skip nested |
phh@568 | 96 | // signal frames. Currently we don't do that on Linux, so it's the |
phh@568 | 97 | // same as os::fetch_frame_from_context(). |
phh@568 | 98 | ExtendedPC os::Linux::fetch_frame_from_ucontext(Thread* thread, |
phh@568 | 99 | ucontext_t* uc, |
phh@568 | 100 | intptr_t** ret_sp, |
phh@568 | 101 | intptr_t** ret_fp) { |
phh@568 | 102 | assert(thread != NULL, "just checking"); |
phh@568 | 103 | assert(ret_sp != NULL, "just checking"); |
phh@568 | 104 | assert(ret_fp != NULL, "just checking"); |
phh@568 | 105 | |
phh@568 | 106 | return os::fetch_frame_from_context(uc, ret_sp, ret_fp); |
phh@568 | 107 | } |
phh@568 | 108 | |
phh@568 | 109 | ExtendedPC os::fetch_frame_from_context(void* ucVoid, |
phh@568 | 110 | intptr_t** ret_sp, |
phh@568 | 111 | intptr_t** ret_fp) { |
phh@568 | 112 | ucontext_t* uc = (ucontext_t*) ucVoid; |
phh@568 | 113 | ExtendedPC epc; |
phh@568 | 114 | |
phh@568 | 115 | if (uc != NULL) { |
phh@568 | 116 | epc = ExtendedPC(os::Linux::ucontext_get_pc(uc)); |
phh@568 | 117 | if (ret_sp) { |
phh@568 | 118 | *ret_sp = os::Linux::ucontext_get_sp(uc); |
phh@568 | 119 | } |
phh@568 | 120 | if (ret_fp) { |
zgu@6921 | 121 | *ret_fp = (intptr_t*)NULL; |
phh@568 | 122 | } |
phh@568 | 123 | } else { |
phh@568 | 124 | // construct empty ExtendedPC for return value checking |
phh@568 | 125 | epc = ExtendedPC(NULL); |
phh@568 | 126 | if (ret_sp) { |
phh@568 | 127 | *ret_sp = (intptr_t*) NULL; |
phh@568 | 128 | } |
phh@568 | 129 | if (ret_fp) { |
phh@568 | 130 | *ret_fp = (intptr_t*) NULL; |
phh@568 | 131 | } |
phh@568 | 132 | } |
phh@568 | 133 | |
phh@568 | 134 | return epc; |
phh@568 | 135 | } |
phh@568 | 136 | |
phh@568 | 137 | frame os::fetch_frame_from_context(void* ucVoid) { |
phh@568 | 138 | intptr_t* sp; |
zgu@6921 | 139 | ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, NULL); |
zgu@6921 | 140 | return frame(sp, frame::unpatchable, epc.pc()); |
phh@568 | 141 | } |
phh@568 | 142 | |
phh@568 | 143 | frame os::get_sender_for_C_frame(frame* fr) { |
zgu@6920 | 144 | return frame(fr->sender_sp(), frame::unpatchable, fr->sender_pc()); |
phh@568 | 145 | } |
phh@568 | 146 | |
phh@568 | 147 | frame os::current_frame() { |
phh@568 | 148 | intptr_t* sp = StubRoutines::Sparc::flush_callers_register_windows_func()(); |
phh@568 | 149 | frame myframe(sp, frame::unpatchable, |
phh@568 | 150 | CAST_FROM_FN_PTR(address, os::current_frame)); |
phh@568 | 151 | if (os::is_first_C_frame(&myframe)) { |
phh@568 | 152 | // stack is not walkable |
phh@568 | 153 | return frame(NULL, frame::unpatchable, NULL); |
phh@568 | 154 | } else { |
phh@568 | 155 | return os::get_sender_for_C_frame(&myframe); |
phh@568 | 156 | } |
phh@568 | 157 | } |
phh@568 | 158 | |
phh@568 | 159 | address os::current_stack_pointer() { |
phh@568 | 160 | register void *sp __asm__ ("sp"); |
phh@568 | 161 | return (address)sp; |
phh@568 | 162 | } |
phh@568 | 163 | |
phh@568 | 164 | static void current_stack_region(address* bottom, size_t* size) { |
phh@568 | 165 | if (os::Linux::is_initial_thread()) { |
phh@568 | 166 | // initial thread needs special handling because pthread_getattr_np() |
phh@568 | 167 | // may return bogus value. |
phh@568 | 168 | *bottom = os::Linux::initial_thread_stack_bottom(); |
phh@568 | 169 | *size = os::Linux::initial_thread_stack_size(); |
phh@568 | 170 | } else { |
phh@568 | 171 | pthread_attr_t attr; |
phh@568 | 172 | |
phh@568 | 173 | int rslt = pthread_getattr_np(pthread_self(), &attr); |
phh@568 | 174 | |
phh@568 | 175 | // JVM needs to know exact stack location, abort if it fails |
phh@568 | 176 | if (rslt != 0) { |
phh@568 | 177 | if (rslt == ENOMEM) { |
ccheung@4993 | 178 | vm_exit_out_of_memory(0, OOM_MMAP_ERROR, "pthread_getattr_np"); |
phh@568 | 179 | } else { |
jcoomes@1845 | 180 | fatal(err_msg("pthread_getattr_np failed with errno = %d", rslt)); |
phh@568 | 181 | } |
phh@568 | 182 | } |
phh@568 | 183 | |
phh@568 | 184 | if (pthread_attr_getstack(&attr, (void**)bottom, size) != 0) { |
phh@568 | 185 | fatal("Can not locate current stack attributes!"); |
phh@568 | 186 | } |
phh@568 | 187 | |
phh@568 | 188 | pthread_attr_destroy(&attr); |
phh@568 | 189 | } |
phh@568 | 190 | assert(os::current_stack_pointer() >= *bottom && |
phh@568 | 191 | os::current_stack_pointer() < *bottom + *size, "just checking"); |
phh@568 | 192 | } |
phh@568 | 193 | |
phh@568 | 194 | address os::current_stack_base() { |
phh@568 | 195 | address bottom; |
phh@568 | 196 | size_t size; |
phh@568 | 197 | current_stack_region(&bottom, &size); |
phh@568 | 198 | return bottom + size; |
phh@568 | 199 | } |
phh@568 | 200 | |
phh@568 | 201 | size_t os::current_stack_size() { |
phh@568 | 202 | // stack size includes normal stack and HotSpot guard pages |
phh@568 | 203 | address bottom; |
phh@568 | 204 | size_t size; |
phh@568 | 205 | current_stack_region(&bottom, &size); |
phh@568 | 206 | return size; |
phh@568 | 207 | } |
phh@568 | 208 | |
phh@568 | 209 | char* os::non_memory_address_word() { |
phh@568 | 210 | // Must never look like an address returned by reserve_memory, |
phh@568 | 211 | // even in its subfields (as defined by the CPU immediate fields, |
phh@568 | 212 | // if the CPU splits constants across multiple instructions). |
phh@568 | 213 | // On SPARC, 0 != %hi(any real address), because there is no |
phh@568 | 214 | // allocation in the first 1Kb of the virtual address space. |
phh@568 | 215 | return (char*) 0; |
phh@568 | 216 | } |
phh@568 | 217 | |
zgu@4079 | 218 | void os::initialize_thread(Thread* thr) {} |
phh@568 | 219 | |
phh@568 | 220 | void os::print_context(outputStream *st, void *context) { |
phh@568 | 221 | if (context == NULL) return; |
phh@568 | 222 | |
phh@568 | 223 | ucontext_t* uc = (ucontext_t*)context; |
phh@568 | 224 | sigcontext* sc = (sigcontext*)context; |
phh@568 | 225 | st->print_cr("Registers:"); |
phh@568 | 226 | |
never@2262 | 227 | st->print_cr(" G1=" INTPTR_FORMAT " G2=" INTPTR_FORMAT |
never@2262 | 228 | " G3=" INTPTR_FORMAT " G4=" INTPTR_FORMAT, |
never@2262 | 229 | SIG_REGS(sc).u_regs[CON_G1], |
never@2262 | 230 | SIG_REGS(sc).u_regs[CON_G2], |
never@2262 | 231 | SIG_REGS(sc).u_regs[CON_G3], |
never@2262 | 232 | SIG_REGS(sc).u_regs[CON_G4]); |
never@2262 | 233 | st->print_cr(" G5=" INTPTR_FORMAT " G6=" INTPTR_FORMAT |
never@2262 | 234 | " G7=" INTPTR_FORMAT " Y=" INTPTR_FORMAT, |
never@2262 | 235 | SIG_REGS(sc).u_regs[CON_G5], |
never@2262 | 236 | SIG_REGS(sc).u_regs[CON_G6], |
never@2262 | 237 | SIG_REGS(sc).u_regs[CON_G7], |
never@2262 | 238 | SIG_REGS(sc).y); |
phh@568 | 239 | st->print_cr(" O0=" INTPTR_FORMAT " O1=" INTPTR_FORMAT |
phh@568 | 240 | " O2=" INTPTR_FORMAT " O3=" INTPTR_FORMAT, |
phh@568 | 241 | SIG_REGS(sc).u_regs[CON_O0], |
phh@568 | 242 | SIG_REGS(sc).u_regs[CON_O1], |
phh@568 | 243 | SIG_REGS(sc).u_regs[CON_O2], |
phh@568 | 244 | SIG_REGS(sc).u_regs[CON_O3]); |
phh@568 | 245 | st->print_cr(" O4=" INTPTR_FORMAT " O5=" INTPTR_FORMAT |
phh@568 | 246 | " O6=" INTPTR_FORMAT " O7=" INTPTR_FORMAT, |
phh@568 | 247 | SIG_REGS(sc).u_regs[CON_O4], |
phh@568 | 248 | SIG_REGS(sc).u_regs[CON_O5], |
phh@568 | 249 | SIG_REGS(sc).u_regs[CON_O6], |
phh@568 | 250 | SIG_REGS(sc).u_regs[CON_O7]); |
phh@568 | 251 | |
never@2262 | 252 | |
never@2262 | 253 | intptr_t *sp = (intptr_t *)os::Linux::ucontext_get_sp(uc); |
never@2262 | 254 | st->print_cr(" L0=" INTPTR_FORMAT " L1=" INTPTR_FORMAT |
never@2262 | 255 | " L2=" INTPTR_FORMAT " L3=" INTPTR_FORMAT, |
never@2262 | 256 | sp[L0->sp_offset_in_saved_window()], |
never@2262 | 257 | sp[L1->sp_offset_in_saved_window()], |
never@2262 | 258 | sp[L2->sp_offset_in_saved_window()], |
never@2262 | 259 | sp[L3->sp_offset_in_saved_window()]); |
never@2262 | 260 | st->print_cr(" L4=" INTPTR_FORMAT " L5=" INTPTR_FORMAT |
never@2262 | 261 | " L6=" INTPTR_FORMAT " L7=" INTPTR_FORMAT, |
never@2262 | 262 | sp[L4->sp_offset_in_saved_window()], |
never@2262 | 263 | sp[L5->sp_offset_in_saved_window()], |
never@2262 | 264 | sp[L6->sp_offset_in_saved_window()], |
never@2262 | 265 | sp[L7->sp_offset_in_saved_window()]); |
never@2262 | 266 | st->print_cr(" I0=" INTPTR_FORMAT " I1=" INTPTR_FORMAT |
never@2262 | 267 | " I2=" INTPTR_FORMAT " I3=" INTPTR_FORMAT, |
never@2262 | 268 | sp[I0->sp_offset_in_saved_window()], |
never@2262 | 269 | sp[I1->sp_offset_in_saved_window()], |
never@2262 | 270 | sp[I2->sp_offset_in_saved_window()], |
never@2262 | 271 | sp[I3->sp_offset_in_saved_window()]); |
never@2262 | 272 | st->print_cr(" I4=" INTPTR_FORMAT " I5=" INTPTR_FORMAT |
never@2262 | 273 | " I6=" INTPTR_FORMAT " I7=" INTPTR_FORMAT, |
never@2262 | 274 | sp[I4->sp_offset_in_saved_window()], |
never@2262 | 275 | sp[I5->sp_offset_in_saved_window()], |
never@2262 | 276 | sp[I6->sp_offset_in_saved_window()], |
never@2262 | 277 | sp[I7->sp_offset_in_saved_window()]); |
phh@568 | 278 | |
phh@568 | 279 | st->print_cr(" PC=" INTPTR_FORMAT " nPC=" INTPTR_FORMAT, |
phh@568 | 280 | SIG_PC(sc), |
phh@568 | 281 | SIG_NPC(sc)); |
phh@568 | 282 | st->cr(); |
phh@568 | 283 | st->cr(); |
phh@568 | 284 | |
phh@568 | 285 | st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp); |
phh@568 | 286 | print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t)); |
phh@568 | 287 | st->cr(); |
phh@568 | 288 | |
phh@568 | 289 | // Note: it may be unsafe to inspect memory near pc. For example, pc may |
phh@568 | 290 | // point to garbage if entry point in an nmethod is corrupted. Leave |
phh@568 | 291 | // this at the end, and hope for the best. |
phh@568 | 292 | address pc = os::Linux::ucontext_get_pc(uc); |
phh@568 | 293 | st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc); |
never@2262 | 294 | print_hex_dump(st, pc - 32, pc + 32, sizeof(char)); |
never@2262 | 295 | } |
never@2262 | 296 | |
never@2262 | 297 | |
never@2262 | 298 | void os::print_register_info(outputStream *st, void *context) { |
never@2262 | 299 | if (context == NULL) return; |
never@2262 | 300 | |
never@2262 | 301 | ucontext_t *uc = (ucontext_t*)context; |
mikael@6683 | 302 | sigcontext* sc = (sigcontext*)context; |
never@2262 | 303 | intptr_t *sp = (intptr_t *)os::Linux::ucontext_get_sp(uc); |
never@2262 | 304 | |
never@2262 | 305 | st->print_cr("Register to memory mapping:"); |
never@2262 | 306 | st->cr(); |
never@2262 | 307 | |
never@2262 | 308 | // this is only for the "general purpose" registers |
mikael@6683 | 309 | st->print("G1="); print_location(st, SIG_REGS(sc).u_regs[CON_G1]); |
mikael@6683 | 310 | st->print("G2="); print_location(st, SIG_REGS(sc).u_regs[CON_G2]); |
mikael@6683 | 311 | st->print("G3="); print_location(st, SIG_REGS(sc).u_regs[CON_G3]); |
mikael@6683 | 312 | st->print("G4="); print_location(st, SIG_REGS(sc).u_regs[CON_G4]); |
mikael@6683 | 313 | st->print("G5="); print_location(st, SIG_REGS(sc).u_regs[CON_G5]); |
mikael@6683 | 314 | st->print("G6="); print_location(st, SIG_REGS(sc).u_regs[CON_G6]); |
mikael@6683 | 315 | st->print("G7="); print_location(st, SIG_REGS(sc).u_regs[CON_G7]); |
never@2262 | 316 | st->cr(); |
never@2262 | 317 | |
mikael@6683 | 318 | st->print("O0="); print_location(st, SIG_REGS(sc).u_regs[CON_O0]); |
mikael@6683 | 319 | st->print("O1="); print_location(st, SIG_REGS(sc).u_regs[CON_O1]); |
mikael@6683 | 320 | st->print("O2="); print_location(st, SIG_REGS(sc).u_regs[CON_O2]); |
mikael@6683 | 321 | st->print("O3="); print_location(st, SIG_REGS(sc).u_regs[CON_O3]); |
mikael@6683 | 322 | st->print("O4="); print_location(st, SIG_REGS(sc).u_regs[CON_O4]); |
mikael@6683 | 323 | st->print("O5="); print_location(st, SIG_REGS(sc).u_regs[CON_O5]); |
mikael@6683 | 324 | st->print("O6="); print_location(st, SIG_REGS(sc).u_regs[CON_O6]); |
mikael@6683 | 325 | st->print("O7="); print_location(st, SIG_REGS(sc).u_regs[CON_O7]); |
never@2262 | 326 | st->cr(); |
never@2262 | 327 | |
never@2262 | 328 | st->print("L0="); print_location(st, sp[L0->sp_offset_in_saved_window()]); |
never@2262 | 329 | st->print("L1="); print_location(st, sp[L1->sp_offset_in_saved_window()]); |
never@2262 | 330 | st->print("L2="); print_location(st, sp[L2->sp_offset_in_saved_window()]); |
never@2262 | 331 | st->print("L3="); print_location(st, sp[L3->sp_offset_in_saved_window()]); |
never@2262 | 332 | st->print("L4="); print_location(st, sp[L4->sp_offset_in_saved_window()]); |
never@2262 | 333 | st->print("L5="); print_location(st, sp[L5->sp_offset_in_saved_window()]); |
never@2262 | 334 | st->print("L6="); print_location(st, sp[L6->sp_offset_in_saved_window()]); |
never@2262 | 335 | st->print("L7="); print_location(st, sp[L7->sp_offset_in_saved_window()]); |
never@2262 | 336 | st->cr(); |
never@2262 | 337 | |
never@2262 | 338 | st->print("I0="); print_location(st, sp[I0->sp_offset_in_saved_window()]); |
never@2262 | 339 | st->print("I1="); print_location(st, sp[I1->sp_offset_in_saved_window()]); |
never@2262 | 340 | st->print("I2="); print_location(st, sp[I2->sp_offset_in_saved_window()]); |
never@2262 | 341 | st->print("I3="); print_location(st, sp[I3->sp_offset_in_saved_window()]); |
never@2262 | 342 | st->print("I4="); print_location(st, sp[I4->sp_offset_in_saved_window()]); |
never@2262 | 343 | st->print("I5="); print_location(st, sp[I5->sp_offset_in_saved_window()]); |
never@2262 | 344 | st->print("I6="); print_location(st, sp[I6->sp_offset_in_saved_window()]); |
never@2262 | 345 | st->print("I7="); print_location(st, sp[I7->sp_offset_in_saved_window()]); |
never@2262 | 346 | st->cr(); |
phh@568 | 347 | } |
phh@568 | 348 | |
phh@568 | 349 | |
phh@568 | 350 | address os::Linux::ucontext_get_pc(ucontext_t* uc) { |
phh@568 | 351 | return (address) SIG_PC((sigcontext*)uc); |
phh@568 | 352 | } |
phh@568 | 353 | |
phh@568 | 354 | intptr_t* os::Linux::ucontext_get_sp(ucontext_t *uc) { |
phh@568 | 355 | return (intptr_t*) |
phh@568 | 356 | ((intptr_t)SIG_REGS((sigcontext*)uc).u_regs[CON_O6] + STACK_BIAS); |
phh@568 | 357 | } |
phh@568 | 358 | |
phh@568 | 359 | // not used on Sparc |
phh@568 | 360 | intptr_t* os::Linux::ucontext_get_fp(ucontext_t *uc) { |
phh@568 | 361 | ShouldNotReachHere(); |
phh@568 | 362 | return NULL; |
phh@568 | 363 | } |
phh@568 | 364 | |
phh@568 | 365 | // Utility functions |
phh@568 | 366 | |
phh@568 | 367 | inline static bool checkPrefetch(sigcontext* uc, address pc) { |
goetz@5400 | 368 | if (StubRoutines::is_safefetch_fault(pc)) { |
goetz@5400 | 369 | set_cont_address(uc, address(StubRoutines::continuation_for_safefetch_fault(pc))); |
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 checkOverflow(sigcontext* uc, |
phh@568 | 376 | address pc, |
phh@568 | 377 | address addr, |
phh@568 | 378 | JavaThread* thread, |
phh@568 | 379 | address* stub) { |
phh@568 | 380 | // check if fault address is within thread stack |
phh@568 | 381 | if (addr < thread->stack_base() && |
phh@568 | 382 | addr >= thread->stack_base() - thread->stack_size()) { |
phh@568 | 383 | // stack overflow |
phh@568 | 384 | if (thread->in_stack_yellow_zone(addr)) { |
phh@568 | 385 | thread->disable_stack_yellow_zone(); |
phh@568 | 386 | if (thread->thread_state() == _thread_in_Java) { |
phh@568 | 387 | // Throw a stack overflow exception. Guard pages will be reenabled |
phh@568 | 388 | // while unwinding the stack. |
phh@568 | 389 | *stub = |
phh@568 | 390 | SharedRuntime::continuation_for_implicit_exception(thread, |
phh@568 | 391 | pc, |
phh@568 | 392 | SharedRuntime::STACK_OVERFLOW); |
phh@568 | 393 | } else { |
phh@568 | 394 | // Thread was in the vm or native code. Return and try to finish. |
phh@568 | 395 | return true; |
phh@568 | 396 | } |
phh@568 | 397 | } else if (thread->in_stack_red_zone(addr)) { |
phh@568 | 398 | // Fatal red zone violation. Disable the guard pages and fall through |
phh@568 | 399 | // to handle_unexpected_exception way down below. |
phh@568 | 400 | thread->disable_stack_red_zone(); |
phh@568 | 401 | tty->print_raw_cr("An irrecoverable stack overflow has occurred."); |
iklam@4710 | 402 | |
iklam@4710 | 403 | // This is a likely cause, but hard to verify. Let's just print |
iklam@4710 | 404 | // it as a hint. |
iklam@4710 | 405 | tty->print_raw_cr("Please check if any of your loaded .so files has " |
iklam@4710 | 406 | "enabled executable stack (see man page execstack(8))"); |
phh@568 | 407 | } else { |
phh@568 | 408 | // Accessing stack address below sp may cause SEGV if current |
phh@568 | 409 | // thread has MAP_GROWSDOWN stack. This should only happen when |
phh@568 | 410 | // current thread was created by user code with MAP_GROWSDOWN flag |
phh@568 | 411 | // and then attached to VM. See notes in os_linux.cpp. |
phh@568 | 412 | if (thread->osthread()->expanding_stack() == 0) { |
phh@568 | 413 | thread->osthread()->set_expanding_stack(); |
phh@568 | 414 | if (os::Linux::manually_expand_stack(thread, addr)) { |
phh@568 | 415 | thread->osthread()->clear_expanding_stack(); |
phh@568 | 416 | return true; |
phh@568 | 417 | } |
phh@568 | 418 | thread->osthread()->clear_expanding_stack(); |
phh@568 | 419 | } else { |
phh@568 | 420 | fatal("recursive segv. expanding stack."); |
phh@568 | 421 | } |
phh@568 | 422 | } |
phh@568 | 423 | } |
phh@568 | 424 | return false; |
phh@568 | 425 | } |
phh@568 | 426 | |
phh@568 | 427 | inline static bool checkPollingPage(address pc, address fault, address* stub) { |
phh@568 | 428 | if (fault == os::get_polling_page()) { |
phh@568 | 429 | *stub = SharedRuntime::get_poll_stub(pc); |
phh@568 | 430 | return true; |
phh@568 | 431 | } |
phh@568 | 432 | return false; |
phh@568 | 433 | } |
phh@568 | 434 | |
phh@568 | 435 | inline static bool checkByteBuffer(address pc, address* stub) { |
phh@568 | 436 | // BugId 4454115: A read from a MappedByteBuffer can fault |
phh@568 | 437 | // here if the underlying file has been truncated. |
phh@568 | 438 | // Do not crash the VM in such a case. |
phh@568 | 439 | CodeBlob* cb = CodeCache::find_blob_unsafe(pc); |
phh@568 | 440 | nmethod* nm = cb->is_nmethod() ? (nmethod*)cb : NULL; |
phh@568 | 441 | if (nm != NULL && nm->has_unsafe_access()) { |
phh@568 | 442 | *stub = StubRoutines::handler_for_unsafe_access(); |
phh@568 | 443 | return true; |
phh@568 | 444 | } |
phh@568 | 445 | return false; |
phh@568 | 446 | } |
phh@568 | 447 | |
phh@568 | 448 | inline static bool checkVerifyOops(address pc, address fault, address* stub) { |
phh@568 | 449 | if (pc >= MacroAssembler::_verify_oop_implicit_branch[0] |
phh@568 | 450 | && pc < MacroAssembler::_verify_oop_implicit_branch[1] ) { |
phh@568 | 451 | *stub = MacroAssembler::_verify_oop_implicit_branch[2]; |
phh@568 | 452 | warning("fixed up memory fault in +VerifyOops at address " |
phh@568 | 453 | INTPTR_FORMAT, fault); |
phh@568 | 454 | return true; |
phh@568 | 455 | } |
phh@568 | 456 | return false; |
phh@568 | 457 | } |
phh@568 | 458 | |
phh@568 | 459 | inline static bool checkFPFault(address pc, int code, |
phh@568 | 460 | JavaThread* thread, address* stub) { |
phh@568 | 461 | if (code == FPE_INTDIV || code == FPE_FLTDIV) { |
phh@568 | 462 | *stub = |
phh@568 | 463 | SharedRuntime:: |
phh@568 | 464 | continuation_for_implicit_exception(thread, |
phh@568 | 465 | pc, |
phh@568 | 466 | SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO); |
phh@568 | 467 | return true; |
phh@568 | 468 | } |
phh@568 | 469 | return false; |
phh@568 | 470 | } |
phh@568 | 471 | |
phh@568 | 472 | inline static bool checkNullPointer(address pc, intptr_t fault, |
phh@568 | 473 | JavaThread* thread, address* stub) { |
phh@568 | 474 | if (!MacroAssembler::needs_explicit_null_check(fault)) { |
phh@568 | 475 | // Determination of interpreter/vtable stub/compiled code null |
phh@568 | 476 | // exception |
phh@568 | 477 | *stub = |
phh@568 | 478 | SharedRuntime:: |
phh@568 | 479 | continuation_for_implicit_exception(thread, pc, |
phh@568 | 480 | SharedRuntime::IMPLICIT_NULL); |
phh@568 | 481 | return true; |
phh@568 | 482 | } |
phh@568 | 483 | return false; |
phh@568 | 484 | } |
phh@568 | 485 | |
phh@568 | 486 | inline static bool checkFastJNIAccess(address pc, address* stub) { |
phh@568 | 487 | address addr = JNI_FastGetField::find_slowcase_pc(pc); |
phh@568 | 488 | if (addr != (address)-1) { |
phh@568 | 489 | *stub = addr; |
phh@568 | 490 | return true; |
phh@568 | 491 | } |
phh@568 | 492 | return false; |
phh@568 | 493 | } |
phh@568 | 494 | |
phh@568 | 495 | inline static bool checkSerializePage(JavaThread* thread, address addr) { |
phh@568 | 496 | return os::is_memory_serialize_page(thread, addr); |
phh@568 | 497 | } |
phh@568 | 498 | |
phh@568 | 499 | inline static bool checkZombie(sigcontext* uc, address* pc, address* stub) { |
phh@568 | 500 | if (nativeInstruction_at(*pc)->is_zombie()) { |
phh@568 | 501 | // zombie method (ld [%g0],%o7 instruction) |
phh@568 | 502 | *stub = SharedRuntime::get_handle_wrong_method_stub(); |
phh@568 | 503 | |
phh@568 | 504 | // At the stub it needs to look like a call from the caller of this |
phh@568 | 505 | // method (not a call from the segv site). |
phh@568 | 506 | *pc = (address)SIG_REGS(uc).u_regs[CON_O7]; |
phh@568 | 507 | return true; |
phh@568 | 508 | } |
phh@568 | 509 | return false; |
phh@568 | 510 | } |
phh@568 | 511 | |
phh@568 | 512 | inline static bool checkICMiss(sigcontext* uc, address* pc, address* stub) { |
phh@568 | 513 | #ifdef COMPILER2 |
phh@568 | 514 | if (nativeInstruction_at(*pc)->is_ic_miss_trap()) { |
phh@568 | 515 | #ifdef ASSERT |
phh@568 | 516 | #ifdef TIERED |
mikael@6683 | 517 | CodeBlob* cb = CodeCache::find_blob_unsafe(*pc); |
phh@568 | 518 | assert(cb->is_compiled_by_c2(), "Wrong compiler"); |
phh@568 | 519 | #endif // TIERED |
phh@568 | 520 | #endif // ASSERT |
phh@568 | 521 | // Inline cache missed and user trap "Tne G0+ST_RESERVED_FOR_USER_0+2" taken. |
phh@568 | 522 | *stub = SharedRuntime::get_ic_miss_stub(); |
phh@568 | 523 | // At the stub it needs to look like a call from the caller of this |
phh@568 | 524 | // method (not a call from the segv site). |
phh@568 | 525 | *pc = (address)SIG_REGS(uc).u_regs[CON_O7]; |
phh@568 | 526 | return true; |
phh@568 | 527 | } |
phh@568 | 528 | #endif // COMPILER2 |
phh@568 | 529 | return false; |
phh@568 | 530 | } |
phh@568 | 531 | |
coleenp@2507 | 532 | extern "C" JNIEXPORT int |
phh@568 | 533 | JVM_handle_linux_signal(int sig, |
phh@568 | 534 | siginfo_t* info, |
phh@568 | 535 | void* ucVoid, |
phh@568 | 536 | int abort_if_unrecognized) { |
phh@568 | 537 | // in fact this isn't ucontext_t* at all, but struct sigcontext* |
phh@568 | 538 | // but Linux porting layer uses ucontext_t, so to minimize code change |
phh@568 | 539 | // we cast as needed |
phh@568 | 540 | ucontext_t* ucFake = (ucontext_t*) ucVoid; |
phh@568 | 541 | sigcontext* uc = (sigcontext*)ucVoid; |
phh@568 | 542 | |
phh@568 | 543 | Thread* t = ThreadLocalStorage::get_thread_slow(); |
phh@568 | 544 | |
rbackman@5424 | 545 | // Must do this before SignalHandlerMark, if crash protection installed we will longjmp away |
rbackman@5424 | 546 | // (no destructors can be run) |
rbackman@5424 | 547 | os::WatcherThreadCrashProtection::check_crash_protection(sig, t); |
rbackman@5424 | 548 | |
phh@568 | 549 | SignalHandlerMark shm(t); |
phh@568 | 550 | |
phh@568 | 551 | // Note: it's not uncommon that JNI code uses signal/sigset to install |
phh@568 | 552 | // then restore certain signal handler (e.g. to temporarily block SIGPIPE, |
phh@568 | 553 | // or have a SIGILL handler when detecting CPU type). When that happens, |
phh@568 | 554 | // JVM_handle_linux_signal() might be invoked with junk info/ucVoid. To |
phh@568 | 555 | // avoid unnecessary crash when libjsig is not preloaded, try handle signals |
phh@568 | 556 | // that do not require siginfo/ucontext first. |
phh@568 | 557 | |
phh@568 | 558 | if (sig == SIGPIPE || sig == SIGXFSZ) { |
phh@568 | 559 | // allow chained handler to go first |
phh@568 | 560 | if (os::Linux::chained_handler(sig, info, ucVoid)) { |
phh@568 | 561 | return true; |
phh@568 | 562 | } else { |
phh@568 | 563 | if (PrintMiscellaneous && (WizardMode || Verbose)) { |
phh@568 | 564 | char buf[64]; |
phh@568 | 565 | warning("Ignoring %s - see bugs 4229104 or 646499219", |
phh@568 | 566 | os::exception_name(sig, buf, sizeof(buf))); |
phh@568 | 567 | } |
phh@568 | 568 | return true; |
phh@568 | 569 | } |
phh@568 | 570 | } |
phh@568 | 571 | |
phh@568 | 572 | JavaThread* thread = NULL; |
phh@568 | 573 | VMThread* vmthread = NULL; |
phh@568 | 574 | if (os::Linux::signal_handlers_are_installed) { |
phh@568 | 575 | if (t != NULL ){ |
phh@568 | 576 | if(t->is_Java_thread()) { |
phh@568 | 577 | thread = (JavaThread*)t; |
phh@568 | 578 | } |
phh@568 | 579 | else if(t->is_VM_thread()){ |
phh@568 | 580 | vmthread = (VMThread *)t; |
phh@568 | 581 | } |
phh@568 | 582 | } |
phh@568 | 583 | } |
phh@568 | 584 | |
phh@568 | 585 | // decide if this trap can be handled by a stub |
phh@568 | 586 | address stub = NULL; |
phh@568 | 587 | address pc = NULL; |
phh@568 | 588 | address npc = NULL; |
phh@568 | 589 | |
phh@568 | 590 | //%note os_trap_1 |
phh@568 | 591 | if (info != NULL && uc != NULL && thread != NULL) { |
phh@568 | 592 | pc = address(SIG_PC(uc)); |
phh@568 | 593 | npc = address(SIG_NPC(uc)); |
phh@568 | 594 | |
phh@568 | 595 | // Check to see if we caught the safepoint code in the |
phh@568 | 596 | // process of write protecting the memory serialization page. |
phh@568 | 597 | // It write enables the page immediately after protecting it |
phh@568 | 598 | // so we can just return to retry the write. |
phh@568 | 599 | if ((sig == SIGSEGV) && checkSerializePage(thread, (address)info->si_addr)) { |
phh@568 | 600 | // Block current thread until the memory serialize page permission restored. |
phh@568 | 601 | os::block_on_serialize_page_trap(); |
phh@568 | 602 | return 1; |
phh@568 | 603 | } |
phh@568 | 604 | |
phh@568 | 605 | if (checkPrefetch(uc, pc)) { |
phh@568 | 606 | return 1; |
phh@568 | 607 | } |
phh@568 | 608 | |
phh@568 | 609 | // Handle ALL stack overflow variations here |
phh@568 | 610 | if (sig == SIGSEGV) { |
phh@568 | 611 | if (checkOverflow(uc, pc, (address)info->si_addr, thread, &stub)) { |
phh@568 | 612 | return 1; |
phh@568 | 613 | } |
phh@568 | 614 | } |
phh@568 | 615 | |
phh@568 | 616 | if (sig == SIGBUS && |
phh@568 | 617 | thread->thread_state() == _thread_in_vm && |
phh@568 | 618 | thread->doing_unsafe_access()) { |
phh@568 | 619 | stub = StubRoutines::handler_for_unsafe_access(); |
phh@568 | 620 | } |
phh@568 | 621 | |
phh@568 | 622 | if (thread->thread_state() == _thread_in_Java) { |
phh@568 | 623 | do { |
phh@568 | 624 | // Java thread running in Java code => find exception handler if any |
phh@568 | 625 | // a fault inside compiled code, the interpreter, or a stub |
phh@568 | 626 | |
phh@568 | 627 | if ((sig == SIGSEGV) && checkPollingPage(pc, (address)info->si_addr, &stub)) { |
phh@568 | 628 | break; |
phh@568 | 629 | } |
phh@568 | 630 | |
phh@568 | 631 | if ((sig == SIGBUS) && checkByteBuffer(pc, &stub)) { |
phh@568 | 632 | break; |
phh@568 | 633 | } |
phh@568 | 634 | |
phh@568 | 635 | if ((sig == SIGSEGV || sig == SIGBUS) && |
phh@568 | 636 | checkVerifyOops(pc, (address)info->si_addr, &stub)) { |
phh@568 | 637 | break; |
phh@568 | 638 | } |
phh@568 | 639 | |
phh@568 | 640 | if ((sig == SIGSEGV) && checkZombie(uc, &pc, &stub)) { |
phh@568 | 641 | break; |
phh@568 | 642 | } |
phh@568 | 643 | |
phh@568 | 644 | if ((sig == SIGILL) && checkICMiss(uc, &pc, &stub)) { |
phh@568 | 645 | break; |
phh@568 | 646 | } |
phh@568 | 647 | |
phh@568 | 648 | if ((sig == SIGFPE) && checkFPFault(pc, info->si_code, thread, &stub)) { |
phh@568 | 649 | break; |
phh@568 | 650 | } |
phh@568 | 651 | |
phh@568 | 652 | if ((sig == SIGSEGV) && |
phh@568 | 653 | checkNullPointer(pc, (intptr_t)info->si_addr, thread, &stub)) { |
phh@568 | 654 | break; |
phh@568 | 655 | } |
phh@568 | 656 | } while (0); |
phh@568 | 657 | |
phh@568 | 658 | // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in |
phh@568 | 659 | // and the heap gets shrunk before the field access. |
phh@568 | 660 | if ((sig == SIGSEGV) || (sig == SIGBUS)) { |
phh@568 | 661 | checkFastJNIAccess(pc, &stub); |
phh@568 | 662 | } |
phh@568 | 663 | } |
phh@568 | 664 | |
phh@568 | 665 | if (stub != NULL) { |
phh@568 | 666 | // save all thread context in case we need to restore it |
phh@568 | 667 | thread->set_saved_exception_pc(pc); |
phh@568 | 668 | thread->set_saved_exception_npc(npc); |
phh@568 | 669 | set_cont_address(uc, stub); |
phh@568 | 670 | return true; |
phh@568 | 671 | } |
phh@568 | 672 | } |
phh@568 | 673 | |
phh@568 | 674 | // signal-chaining |
phh@568 | 675 | if (os::Linux::chained_handler(sig, info, ucVoid)) { |
phh@568 | 676 | return true; |
phh@568 | 677 | } |
phh@568 | 678 | |
phh@568 | 679 | if (!abort_if_unrecognized) { |
phh@568 | 680 | // caller wants another chance, so give it to him |
phh@568 | 681 | return false; |
phh@568 | 682 | } |
phh@568 | 683 | |
phh@568 | 684 | if (pc == NULL && uc != NULL) { |
phh@568 | 685 | pc = os::Linux::ucontext_get_pc((ucontext_t*)uc); |
phh@568 | 686 | } |
phh@568 | 687 | |
phh@568 | 688 | // unmask current signal |
phh@568 | 689 | sigset_t newset; |
phh@568 | 690 | sigemptyset(&newset); |
phh@568 | 691 | sigaddset(&newset, sig); |
phh@568 | 692 | sigprocmask(SIG_UNBLOCK, &newset, NULL); |
phh@568 | 693 | |
phh@568 | 694 | VMError err(t, sig, pc, info, ucVoid); |
phh@568 | 695 | err.report_and_die(); |
phh@568 | 696 | |
phh@568 | 697 | ShouldNotReachHere(); |
phh@568 | 698 | } |
phh@568 | 699 | |
phh@568 | 700 | void os::Linux::init_thread_fpu_state(void) { |
phh@568 | 701 | // Nothing to do |
phh@568 | 702 | } |
phh@568 | 703 | |
phh@568 | 704 | int os::Linux::get_fpu_control_word() { |
phh@568 | 705 | return 0; |
phh@568 | 706 | } |
phh@568 | 707 | |
phh@568 | 708 | void os::Linux::set_fpu_control_word(int fpu) { |
phh@568 | 709 | // nothing |
phh@568 | 710 | } |
phh@568 | 711 | |
phh@568 | 712 | bool os::is_allocatable(size_t bytes) { |
phh@568 | 713 | #ifdef _LP64 |
phh@568 | 714 | return true; |
phh@568 | 715 | #else |
phh@568 | 716 | if (bytes < 2 * G) { |
phh@568 | 717 | return true; |
phh@568 | 718 | } |
phh@568 | 719 | |
phh@568 | 720 | char* addr = reserve_memory(bytes, NULL); |
phh@568 | 721 | |
phh@568 | 722 | if (addr != NULL) { |
phh@568 | 723 | release_memory(addr, bytes); |
phh@568 | 724 | } |
phh@568 | 725 | |
phh@568 | 726 | return addr != NULL; |
phh@568 | 727 | #endif // _LP64 |
phh@568 | 728 | } |
phh@568 | 729 | |
phh@568 | 730 | /////////////////////////////////////////////////////////////////////////////// |
phh@568 | 731 | // thread stack |
phh@568 | 732 | |
phh@568 | 733 | size_t os::Linux::min_stack_allowed = 128 * K; |
phh@568 | 734 | |
phh@568 | 735 | // pthread on Ubuntu is always in floating stack mode |
phh@568 | 736 | bool os::Linux::supports_variable_stack_size() { return true; } |
phh@568 | 737 | |
phh@568 | 738 | // return default stack size for thr_type |
phh@568 | 739 | size_t os::Linux::default_stack_size(os::ThreadType thr_type) { |
phh@568 | 740 | // default stack size (compiler thread needs larger stack) |
phh@568 | 741 | size_t s = (thr_type == os::compiler_thread ? 4 * M : 1 * M); |
phh@568 | 742 | return s; |
phh@568 | 743 | } |
phh@568 | 744 | |
phh@568 | 745 | size_t os::Linux::default_guard_size(os::ThreadType thr_type) { |
phh@568 | 746 | // Creating guard page is very expensive. Java thread has HotSpot |
phh@568 | 747 | // guard page, only enable glibc guard page for non-Java threads. |
phh@568 | 748 | return (thr_type == java_thread ? 0 : page_size()); |
phh@568 | 749 | } |
roland@3606 | 750 | |
roland@3606 | 751 | #ifndef PRODUCT |
roland@3606 | 752 | void os::verify_stack_alignment() { |
roland@3606 | 753 | } |
roland@3606 | 754 | #endif |