Wed, 01 Dec 2010 18:26:32 -0500
6348631: remove the use of the HPI library from Hotspot
Summary: move functions from hpi library to hotspot, communicate with licensees and open source community, check jdk for dependency, file CCC request
Reviewed-by: coleenp, acorn, dsamersoff
never@1445 | 1 | /* |
stefank@2314 | 2 | * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. |
twisti@1611 | 3 | * Copyright 2007, 2008, 2009, 2010 Red Hat, Inc. |
never@1445 | 4 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
never@1445 | 5 | * |
never@1445 | 6 | * This code is free software; you can redistribute it and/or modify it |
never@1445 | 7 | * under the terms of the GNU General Public License version 2 only, as |
never@1445 | 8 | * published by the Free Software Foundation. |
never@1445 | 9 | * |
never@1445 | 10 | * This code is distributed in the hope that it will be useful, but WITHOUT |
never@1445 | 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
never@1445 | 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
never@1445 | 13 | * version 2 for more details (a copy is included in the LICENSE file that |
never@1445 | 14 | * accompanied this code). |
never@1445 | 15 | * |
never@1445 | 16 | * You should have received a copy of the GNU General Public License version |
never@1445 | 17 | * 2 along with this work; if not, write to the Free Software Foundation, |
never@1445 | 18 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
never@1445 | 19 | * |
trims@1907 | 20 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 21 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 22 | * questions. |
never@1445 | 23 | * |
never@1445 | 24 | */ |
never@1445 | 25 | |
stefank@2314 | 26 | // no precompiled headers |
stefank@2314 | 27 | #include "assembler_zero.inline.hpp" |
stefank@2314 | 28 | #include "classfile/classLoader.hpp" |
stefank@2314 | 29 | #include "classfile/systemDictionary.hpp" |
stefank@2314 | 30 | #include "classfile/vmSymbols.hpp" |
stefank@2314 | 31 | #include "code/icBuffer.hpp" |
stefank@2314 | 32 | #include "code/vtableStubs.hpp" |
stefank@2314 | 33 | #include "interpreter/interpreter.hpp" |
stefank@2314 | 34 | #include "jvm_linux.h" |
stefank@2314 | 35 | #include "memory/allocation.inline.hpp" |
stefank@2314 | 36 | #include "mutex_linux.inline.hpp" |
stefank@2314 | 37 | #include "nativeInst_zero.hpp" |
stefank@2314 | 38 | #include "os_share_linux.hpp" |
stefank@2314 | 39 | #include "prims/jniFastGetField.hpp" |
stefank@2314 | 40 | #include "prims/jvm.h" |
stefank@2314 | 41 | #include "prims/jvm_misc.hpp" |
stefank@2314 | 42 | #include "runtime/arguments.hpp" |
stefank@2314 | 43 | #include "runtime/extendedPC.hpp" |
stefank@2314 | 44 | #include "runtime/frame.inline.hpp" |
stefank@2314 | 45 | #include "runtime/interfaceSupport.hpp" |
stefank@2314 | 46 | #include "runtime/java.hpp" |
stefank@2314 | 47 | #include "runtime/javaCalls.hpp" |
stefank@2314 | 48 | #include "runtime/mutexLocker.hpp" |
stefank@2314 | 49 | #include "runtime/osThread.hpp" |
stefank@2314 | 50 | #include "runtime/sharedRuntime.hpp" |
stefank@2314 | 51 | #include "runtime/stubRoutines.hpp" |
stefank@2314 | 52 | #include "runtime/timer.hpp" |
stefank@2314 | 53 | #include "thread_linux.inline.hpp" |
stefank@2314 | 54 | #include "utilities/events.hpp" |
stefank@2314 | 55 | #include "utilities/vmError.hpp" |
stefank@2314 | 56 | #ifdef COMPILER1 |
stefank@2314 | 57 | #include "c1/c1_Runtime1.hpp" |
stefank@2314 | 58 | #endif |
stefank@2314 | 59 | #ifdef COMPILER2 |
stefank@2314 | 60 | #include "opto/runtime.hpp" |
stefank@2314 | 61 | #endif |
never@1445 | 62 | |
never@1445 | 63 | address os::current_stack_pointer() { |
never@1445 | 64 | address dummy = (address) &dummy; |
never@1445 | 65 | return dummy; |
never@1445 | 66 | } |
never@1445 | 67 | |
never@1445 | 68 | frame os::get_sender_for_C_frame(frame* fr) { |
never@1445 | 69 | ShouldNotCallThis(); |
never@1445 | 70 | } |
never@1445 | 71 | |
never@1445 | 72 | frame os::current_frame() { |
never@1445 | 73 | // The only thing that calls this is the stack printing code in |
never@1445 | 74 | // VMError::report: |
never@1445 | 75 | // - Step 110 (printing stack bounds) uses the sp in the frame |
never@1445 | 76 | // to determine the amount of free space on the stack. We |
never@1445 | 77 | // set the sp to a close approximation of the real value in |
never@1445 | 78 | // order to allow this step to complete. |
never@1445 | 79 | // - Step 120 (printing native stack) tries to walk the stack. |
never@1445 | 80 | // The frame we create has a NULL pc, which is ignored as an |
never@1445 | 81 | // invalid frame. |
never@1445 | 82 | frame dummy = frame(); |
never@1445 | 83 | dummy.set_sp((intptr_t *) current_stack_pointer()); |
never@1445 | 84 | return dummy; |
never@1445 | 85 | } |
never@1445 | 86 | |
never@1445 | 87 | char* os::non_memory_address_word() { |
never@1445 | 88 | // Must never look like an address returned by reserve_memory, |
never@1445 | 89 | // even in its subfields (as defined by the CPU immediate fields, |
never@1445 | 90 | // if the CPU splits constants across multiple instructions). |
never@1445 | 91 | #ifdef SPARC |
never@1445 | 92 | // On SPARC, 0 != %hi(any real address), because there is no |
never@1445 | 93 | // allocation in the first 1Kb of the virtual address space. |
never@1445 | 94 | return (char *) 0; |
never@1445 | 95 | #else |
never@1445 | 96 | // This is the value for x86; works pretty well for PPC too. |
never@1445 | 97 | return (char *) -1; |
never@1445 | 98 | #endif // SPARC |
never@1445 | 99 | } |
never@1445 | 100 | |
never@1445 | 101 | void os::initialize_thread() { |
never@1445 | 102 | // Nothing to do. |
never@1445 | 103 | } |
never@1445 | 104 | |
never@1445 | 105 | address os::Linux::ucontext_get_pc(ucontext_t* uc) { |
never@1445 | 106 | ShouldNotCallThis(); |
never@1445 | 107 | } |
never@1445 | 108 | |
never@1445 | 109 | ExtendedPC os::fetch_frame_from_context(void* ucVoid, |
never@1445 | 110 | intptr_t** ret_sp, |
never@1445 | 111 | intptr_t** ret_fp) { |
never@1445 | 112 | ShouldNotCallThis(); |
never@1445 | 113 | } |
never@1445 | 114 | |
never@1445 | 115 | frame os::fetch_frame_from_context(void* ucVoid) { |
never@1445 | 116 | ShouldNotCallThis(); |
never@1445 | 117 | } |
never@1445 | 118 | |
never@1445 | 119 | extern "C" int |
never@1445 | 120 | JVM_handle_linux_signal(int sig, |
never@1445 | 121 | siginfo_t* info, |
never@1445 | 122 | void* ucVoid, |
never@1445 | 123 | int abort_if_unrecognized) { |
never@1445 | 124 | ucontext_t* uc = (ucontext_t*) ucVoid; |
never@1445 | 125 | |
never@1445 | 126 | Thread* t = ThreadLocalStorage::get_thread_slow(); |
never@1445 | 127 | |
never@1445 | 128 | SignalHandlerMark shm(t); |
never@1445 | 129 | |
never@1445 | 130 | // Note: it's not uncommon that JNI code uses signal/sigset to |
never@1445 | 131 | // install then restore certain signal handler (e.g. to temporarily |
never@1445 | 132 | // block SIGPIPE, or have a SIGILL handler when detecting CPU |
never@1445 | 133 | // type). When that happens, JVM_handle_linux_signal() might be |
never@1445 | 134 | // invoked with junk info/ucVoid. To avoid unnecessary crash when |
never@1445 | 135 | // libjsig is not preloaded, try handle signals that do not require |
never@1445 | 136 | // siginfo/ucontext first. |
never@1445 | 137 | |
never@1445 | 138 | if (sig == SIGPIPE || sig == SIGXFSZ) { |
never@1445 | 139 | // allow chained handler to go first |
never@1445 | 140 | if (os::Linux::chained_handler(sig, info, ucVoid)) { |
never@1445 | 141 | return true; |
never@1445 | 142 | } else { |
never@1445 | 143 | if (PrintMiscellaneous && (WizardMode || Verbose)) { |
never@1445 | 144 | char buf[64]; |
never@1445 | 145 | warning("Ignoring %s - see bugs 4229104 or 646499219", |
never@1445 | 146 | os::exception_name(sig, buf, sizeof(buf))); |
never@1445 | 147 | } |
never@1445 | 148 | return true; |
never@1445 | 149 | } |
never@1445 | 150 | } |
never@1445 | 151 | |
never@1445 | 152 | JavaThread* thread = NULL; |
never@1445 | 153 | VMThread* vmthread = NULL; |
never@1445 | 154 | if (os::Linux::signal_handlers_are_installed) { |
never@1445 | 155 | if (t != NULL ){ |
never@1445 | 156 | if(t->is_Java_thread()) { |
never@1445 | 157 | thread = (JavaThread*)t; |
never@1445 | 158 | } |
never@1445 | 159 | else if(t->is_VM_thread()){ |
never@1445 | 160 | vmthread = (VMThread *)t; |
never@1445 | 161 | } |
never@1445 | 162 | } |
never@1445 | 163 | } |
never@1445 | 164 | |
never@1445 | 165 | if (info != NULL && thread != NULL) { |
never@1445 | 166 | // Handle ALL stack overflow variations here |
never@1445 | 167 | if (sig == SIGSEGV) { |
never@1445 | 168 | address addr = (address) info->si_addr; |
never@1445 | 169 | |
never@1445 | 170 | // check if fault address is within thread stack |
never@1445 | 171 | if (addr < thread->stack_base() && |
never@1445 | 172 | addr >= thread->stack_base() - thread->stack_size()) { |
never@1445 | 173 | // stack overflow |
never@1445 | 174 | if (thread->in_stack_yellow_zone(addr)) { |
never@1445 | 175 | thread->disable_stack_yellow_zone(); |
never@1445 | 176 | ShouldNotCallThis(); |
never@1445 | 177 | } |
never@1445 | 178 | else if (thread->in_stack_red_zone(addr)) { |
never@1445 | 179 | thread->disable_stack_red_zone(); |
never@1445 | 180 | ShouldNotCallThis(); |
never@1445 | 181 | } |
never@1445 | 182 | else { |
never@1445 | 183 | // Accessing stack address below sp may cause SEGV if |
never@1445 | 184 | // current thread has MAP_GROWSDOWN stack. This should |
never@1445 | 185 | // only happen when current thread was created by user |
never@1445 | 186 | // code with MAP_GROWSDOWN flag and then attached to VM. |
never@1445 | 187 | // See notes in os_linux.cpp. |
never@1445 | 188 | if (thread->osthread()->expanding_stack() == 0) { |
never@1445 | 189 | thread->osthread()->set_expanding_stack(); |
never@1445 | 190 | if (os::Linux::manually_expand_stack(thread, addr)) { |
never@1445 | 191 | thread->osthread()->clear_expanding_stack(); |
never@1445 | 192 | return true; |
never@1445 | 193 | } |
never@1445 | 194 | thread->osthread()->clear_expanding_stack(); |
never@1445 | 195 | } |
never@1445 | 196 | else { |
never@1445 | 197 | fatal("recursive segv. expanding stack."); |
never@1445 | 198 | } |
never@1445 | 199 | } |
never@1445 | 200 | } |
never@1445 | 201 | } |
never@1445 | 202 | |
never@1445 | 203 | /*if (thread->thread_state() == _thread_in_Java) { |
never@1445 | 204 | ShouldNotCallThis(); |
never@1445 | 205 | } |
never@1445 | 206 | else*/ if (thread->thread_state() == _thread_in_vm && |
never@1445 | 207 | sig == SIGBUS && thread->doing_unsafe_access()) { |
never@1445 | 208 | ShouldNotCallThis(); |
never@1445 | 209 | } |
never@1445 | 210 | |
never@1445 | 211 | // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC |
never@1445 | 212 | // kicks in and the heap gets shrunk before the field access. |
never@1445 | 213 | /*if (sig == SIGSEGV || sig == SIGBUS) { |
never@1445 | 214 | address addr = JNI_FastGetField::find_slowcase_pc(pc); |
never@1445 | 215 | if (addr != (address)-1) { |
never@1445 | 216 | stub = addr; |
never@1445 | 217 | } |
never@1445 | 218 | }*/ |
never@1445 | 219 | |
never@1445 | 220 | // Check to see if we caught the safepoint code in the process |
never@1445 | 221 | // of write protecting the memory serialization page. It write |
never@1445 | 222 | // enables the page immediately after protecting it so we can |
never@1445 | 223 | // just return to retry the write. |
never@1445 | 224 | if (sig == SIGSEGV && |
never@1445 | 225 | os::is_memory_serialize_page(thread, (address) info->si_addr)) { |
never@1445 | 226 | // Block current thread until permission is restored. |
never@1445 | 227 | os::block_on_serialize_page_trap(); |
never@1445 | 228 | return true; |
never@1445 | 229 | } |
never@1445 | 230 | } |
never@1445 | 231 | |
never@1445 | 232 | // signal-chaining |
never@1445 | 233 | if (os::Linux::chained_handler(sig, info, ucVoid)) { |
never@1445 | 234 | return true; |
never@1445 | 235 | } |
never@1445 | 236 | |
never@1445 | 237 | if (!abort_if_unrecognized) { |
never@1445 | 238 | // caller wants another chance, so give it to him |
never@1445 | 239 | return false; |
never@1445 | 240 | } |
never@1445 | 241 | |
never@1445 | 242 | #ifndef PRODUCT |
never@1445 | 243 | if (sig == SIGSEGV) { |
never@1445 | 244 | fatal("\n#" |
never@1445 | 245 | "\n# /--------------------\\" |
never@1445 | 246 | "\n# | segmentation fault |" |
never@1445 | 247 | "\n# \\---\\ /--------------/" |
never@1445 | 248 | "\n# /" |
never@1445 | 249 | "\n# [-] |\\_/| " |
never@1445 | 250 | "\n# (+)=C |o o|__ " |
never@1445 | 251 | "\n# | | =-*-=__\\ " |
never@1445 | 252 | "\n# OOO c_c_(___)"); |
never@1445 | 253 | } |
never@1445 | 254 | #endif // !PRODUCT |
never@1445 | 255 | |
never@1445 | 256 | const char *fmt = "caught unhandled signal %d"; |
never@1445 | 257 | char buf[64]; |
never@1445 | 258 | |
never@1445 | 259 | sprintf(buf, fmt, sig); |
never@1445 | 260 | fatal(buf); |
never@1445 | 261 | } |
never@1445 | 262 | |
never@1445 | 263 | void os::Linux::init_thread_fpu_state(void) { |
never@1445 | 264 | // Nothing to do |
never@1445 | 265 | } |
never@1445 | 266 | |
never@1445 | 267 | int os::Linux::get_fpu_control_word() { |
never@1445 | 268 | ShouldNotCallThis(); |
never@1445 | 269 | } |
never@1445 | 270 | |
never@1445 | 271 | void os::Linux::set_fpu_control_word(int fpu) { |
never@1445 | 272 | ShouldNotCallThis(); |
never@1445 | 273 | } |
never@1445 | 274 | |
never@1445 | 275 | bool os::is_allocatable(size_t bytes) { |
twisti@1611 | 276 | #ifdef _LP64 |
twisti@1611 | 277 | return true; |
twisti@1611 | 278 | #else |
twisti@1611 | 279 | if (bytes < 2 * G) { |
twisti@1611 | 280 | return true; |
twisti@1611 | 281 | } |
twisti@1611 | 282 | |
twisti@1611 | 283 | char* addr = reserve_memory(bytes, NULL); |
twisti@1611 | 284 | |
twisti@1611 | 285 | if (addr != NULL) { |
twisti@1611 | 286 | release_memory(addr, bytes); |
twisti@1611 | 287 | } |
twisti@1611 | 288 | |
twisti@1611 | 289 | return addr != NULL; |
twisti@1611 | 290 | #endif // _LP64 |
never@1445 | 291 | } |
never@1445 | 292 | |
never@1445 | 293 | /////////////////////////////////////////////////////////////////////////////// |
never@1445 | 294 | // thread stack |
never@1445 | 295 | |
never@1445 | 296 | size_t os::Linux::min_stack_allowed = 64 * K; |
never@1445 | 297 | |
never@1445 | 298 | bool os::Linux::supports_variable_stack_size() { |
never@1445 | 299 | return true; |
never@1445 | 300 | } |
never@1445 | 301 | |
never@1445 | 302 | size_t os::Linux::default_stack_size(os::ThreadType thr_type) { |
never@1445 | 303 | #ifdef _LP64 |
never@1445 | 304 | size_t s = (thr_type == os::compiler_thread ? 4 * M : 1 * M); |
never@1445 | 305 | #else |
never@1445 | 306 | size_t s = (thr_type == os::compiler_thread ? 2 * M : 512 * K); |
never@1445 | 307 | #endif // _LP64 |
never@1445 | 308 | return s; |
never@1445 | 309 | } |
never@1445 | 310 | |
never@1445 | 311 | size_t os::Linux::default_guard_size(os::ThreadType thr_type) { |
never@1445 | 312 | // Only enable glibc guard pages for non-Java threads |
never@1445 | 313 | // (Java threads have HotSpot guard pages) |
never@1445 | 314 | return (thr_type == java_thread ? 0 : page_size()); |
never@1445 | 315 | } |
never@1445 | 316 | |
never@1445 | 317 | static void current_stack_region(address *bottom, size_t *size) { |
never@1445 | 318 | pthread_attr_t attr; |
never@1445 | 319 | int res = pthread_getattr_np(pthread_self(), &attr); |
never@1445 | 320 | if (res != 0) { |
never@1445 | 321 | if (res == ENOMEM) { |
never@1445 | 322 | vm_exit_out_of_memory(0, "pthread_getattr_np"); |
never@1445 | 323 | } |
never@1445 | 324 | else { |
jcoomes@1877 | 325 | fatal(err_msg("pthread_getattr_np failed with errno = %d", res)); |
never@1445 | 326 | } |
never@1445 | 327 | } |
never@1445 | 328 | |
never@1445 | 329 | address stack_bottom; |
never@1445 | 330 | size_t stack_bytes; |
never@1445 | 331 | res = pthread_attr_getstack(&attr, (void **) &stack_bottom, &stack_bytes); |
never@1445 | 332 | if (res != 0) { |
jcoomes@1877 | 333 | fatal(err_msg("pthread_attr_getstack failed with errno = %d", res)); |
never@1445 | 334 | } |
never@1445 | 335 | address stack_top = stack_bottom + stack_bytes; |
never@1445 | 336 | |
never@1445 | 337 | // The block of memory returned by pthread_attr_getstack() includes |
never@1445 | 338 | // guard pages where present. We need to trim these off. |
never@1445 | 339 | size_t page_bytes = os::Linux::page_size(); |
never@1445 | 340 | assert(((intptr_t) stack_bottom & (page_bytes - 1)) == 0, "unaligned stack"); |
never@1445 | 341 | |
never@1445 | 342 | size_t guard_bytes; |
never@1445 | 343 | res = pthread_attr_getguardsize(&attr, &guard_bytes); |
never@1445 | 344 | if (res != 0) { |
jcoomes@1877 | 345 | fatal(err_msg("pthread_attr_getguardsize failed with errno = %d", res)); |
never@1445 | 346 | } |
never@1445 | 347 | int guard_pages = align_size_up(guard_bytes, page_bytes) / page_bytes; |
never@1445 | 348 | assert(guard_bytes == guard_pages * page_bytes, "unaligned guard"); |
never@1445 | 349 | |
never@1445 | 350 | #ifdef IA64 |
never@1445 | 351 | // IA64 has two stacks sharing the same area of memory, a normal |
never@1445 | 352 | // stack growing downwards and a register stack growing upwards. |
never@1445 | 353 | // Guard pages, if present, are in the centre. This code splits |
never@1445 | 354 | // the stack in two even without guard pages, though in theory |
never@1445 | 355 | // there's nothing to stop us allocating more to the normal stack |
never@1445 | 356 | // or more to the register stack if one or the other were found |
never@1445 | 357 | // to grow faster. |
never@1445 | 358 | int total_pages = align_size_down(stack_bytes, page_bytes) / page_bytes; |
never@1445 | 359 | stack_bottom += (total_pages - guard_pages) / 2 * page_bytes; |
never@1445 | 360 | #endif // IA64 |
never@1445 | 361 | |
never@1445 | 362 | stack_bottom += guard_bytes; |
never@1445 | 363 | |
never@1445 | 364 | pthread_attr_destroy(&attr); |
never@1445 | 365 | |
never@1445 | 366 | // The initial thread has a growable stack, and the size reported |
never@1445 | 367 | // by pthread_attr_getstack is the maximum size it could possibly |
never@1445 | 368 | // be given what currently mapped. This can be huge, so we cap it. |
never@1445 | 369 | if (os::Linux::is_initial_thread()) { |
never@1445 | 370 | stack_bytes = stack_top - stack_bottom; |
never@1445 | 371 | |
never@1445 | 372 | if (stack_bytes > JavaThread::stack_size_at_create()) |
never@1445 | 373 | stack_bytes = JavaThread::stack_size_at_create(); |
never@1445 | 374 | |
never@1445 | 375 | stack_bottom = stack_top - stack_bytes; |
never@1445 | 376 | } |
never@1445 | 377 | |
never@1445 | 378 | assert(os::current_stack_pointer() >= stack_bottom, "should do"); |
never@1445 | 379 | assert(os::current_stack_pointer() < stack_top, "should do"); |
never@1445 | 380 | |
never@1445 | 381 | *bottom = stack_bottom; |
never@1445 | 382 | *size = stack_top - stack_bottom; |
never@1445 | 383 | } |
never@1445 | 384 | |
never@1445 | 385 | address os::current_stack_base() { |
never@1445 | 386 | address bottom; |
never@1445 | 387 | size_t size; |
never@1445 | 388 | current_stack_region(&bottom, &size); |
never@1445 | 389 | return bottom + size; |
never@1445 | 390 | } |
never@1445 | 391 | |
never@1445 | 392 | size_t os::current_stack_size() { |
never@1445 | 393 | // stack size includes normal stack and HotSpot guard pages |
never@1445 | 394 | address bottom; |
never@1445 | 395 | size_t size; |
never@1445 | 396 | current_stack_region(&bottom, &size); |
never@1445 | 397 | return size; |
never@1445 | 398 | } |
never@1445 | 399 | |
never@1445 | 400 | ///////////////////////////////////////////////////////////////////////////// |
never@1445 | 401 | // helper functions for fatal error handler |
never@1445 | 402 | |
never@1445 | 403 | void os::print_context(outputStream* st, void* context) { |
never@1445 | 404 | ShouldNotCallThis(); |
never@1445 | 405 | } |
never@1445 | 406 | |
twisti@2312 | 407 | void os::print_register_info(outputStream *st, void *context) { |
twisti@2312 | 408 | ShouldNotCallThis(); |
twisti@2312 | 409 | } |
twisti@2312 | 410 | |
never@1445 | 411 | ///////////////////////////////////////////////////////////////////////////// |
never@1445 | 412 | // Stubs for things that would be in linux_zero.s if it existed. |
never@1445 | 413 | // You probably want to disassemble these monkeys to check they're ok. |
never@1445 | 414 | |
never@1445 | 415 | extern "C" { |
never@1445 | 416 | int SpinPause() { |
never@1445 | 417 | } |
never@1445 | 418 | |
never@1445 | 419 | int SafeFetch32(int *adr, int errValue) { |
never@1445 | 420 | int value = errValue; |
never@1445 | 421 | value = *adr; |
never@1445 | 422 | return value; |
never@1445 | 423 | } |
never@1445 | 424 | intptr_t SafeFetchN(intptr_t *adr, intptr_t errValue) { |
never@1445 | 425 | intptr_t value = errValue; |
never@1445 | 426 | value = *adr; |
never@1445 | 427 | return value; |
never@1445 | 428 | } |
never@1445 | 429 | |
never@1445 | 430 | void _Copy_conjoint_jshorts_atomic(jshort* from, jshort* to, size_t count) { |
never@1445 | 431 | if (from > to) { |
never@1445 | 432 | jshort *end = from + count; |
never@1445 | 433 | while (from < end) |
never@1445 | 434 | *(to++) = *(from++); |
never@1445 | 435 | } |
never@1445 | 436 | else if (from < to) { |
never@1445 | 437 | jshort *end = from; |
never@1445 | 438 | from += count - 1; |
never@1445 | 439 | to += count - 1; |
never@1445 | 440 | while (from >= end) |
never@1445 | 441 | *(to--) = *(from--); |
never@1445 | 442 | } |
never@1445 | 443 | } |
never@1445 | 444 | void _Copy_conjoint_jints_atomic(jint* from, jint* to, size_t count) { |
never@1445 | 445 | if (from > to) { |
never@1445 | 446 | jint *end = from + count; |
never@1445 | 447 | while (from < end) |
never@1445 | 448 | *(to++) = *(from++); |
never@1445 | 449 | } |
never@1445 | 450 | else if (from < to) { |
never@1445 | 451 | jint *end = from; |
never@1445 | 452 | from += count - 1; |
never@1445 | 453 | to += count - 1; |
never@1445 | 454 | while (from >= end) |
never@1445 | 455 | *(to--) = *(from--); |
never@1445 | 456 | } |
never@1445 | 457 | } |
never@1445 | 458 | void _Copy_conjoint_jlongs_atomic(jlong* from, jlong* to, size_t count) { |
never@1445 | 459 | if (from > to) { |
never@1445 | 460 | jlong *end = from + count; |
never@1445 | 461 | while (from < end) |
never@1445 | 462 | os::atomic_copy64(from++, to++); |
never@1445 | 463 | } |
never@1445 | 464 | else if (from < to) { |
never@1445 | 465 | jlong *end = from; |
never@1445 | 466 | from += count - 1; |
never@1445 | 467 | to += count - 1; |
never@1445 | 468 | while (from >= end) |
never@1445 | 469 | os::atomic_copy64(from--, to--); |
never@1445 | 470 | } |
never@1445 | 471 | } |
never@1445 | 472 | |
never@1445 | 473 | void _Copy_arrayof_conjoint_bytes(HeapWord* from, |
never@1445 | 474 | HeapWord* to, |
never@1445 | 475 | size_t count) { |
twisti@2084 | 476 | memmove(to, from, count); |
never@1445 | 477 | } |
never@1445 | 478 | void _Copy_arrayof_conjoint_jshorts(HeapWord* from, |
never@1445 | 479 | HeapWord* to, |
never@1445 | 480 | size_t count) { |
twisti@2084 | 481 | memmove(to, from, count * 2); |
never@1445 | 482 | } |
never@1445 | 483 | void _Copy_arrayof_conjoint_jints(HeapWord* from, |
never@1445 | 484 | HeapWord* to, |
never@1445 | 485 | size_t count) { |
twisti@2084 | 486 | memmove(to, from, count * 4); |
never@1445 | 487 | } |
never@1445 | 488 | void _Copy_arrayof_conjoint_jlongs(HeapWord* from, |
never@1445 | 489 | HeapWord* to, |
never@1445 | 490 | size_t count) { |
twisti@2084 | 491 | memmove(to, from, count * 8); |
never@1445 | 492 | } |
never@1445 | 493 | }; |
never@1445 | 494 | |
never@1445 | 495 | ///////////////////////////////////////////////////////////////////////////// |
never@1445 | 496 | // Implementations of atomic operations not supported by processors. |
never@1445 | 497 | // -- http://gcc.gnu.org/onlinedocs/gcc-4.2.1/gcc/Atomic-Builtins.html |
never@1445 | 498 | |
never@1445 | 499 | #ifndef _LP64 |
never@1445 | 500 | extern "C" { |
never@1445 | 501 | long long unsigned int __sync_val_compare_and_swap_8( |
never@1445 | 502 | volatile void *ptr, |
never@1445 | 503 | long long unsigned int oldval, |
never@1445 | 504 | long long unsigned int newval) { |
never@1445 | 505 | ShouldNotCallThis(); |
never@1445 | 506 | } |
never@1445 | 507 | }; |
never@1445 | 508 | #endif // !_LP64 |