Thu, 24 Mar 2011 15:47:01 -0700
7029036: Card-table verification hangs with all framework collectors, except G1, even before the first GC
Summary: When verifying clean card ranges, use memory-range-bounded iteration over oops of objects overlapping that range, thus avoiding the otherwise quadratic worst-case cost of scanning large object arrays.
Reviewed-by: jmasa, jwilhelm, tonyp
duke@435 | 1 | /* |
kvn@2557 | 2 | * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 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. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
stefank@2314 | 25 | #ifndef SHARE_VM_MEMORY_ALLOCATION_INLINE_HPP |
stefank@2314 | 26 | #define SHARE_VM_MEMORY_ALLOCATION_INLINE_HPP |
stefank@2314 | 27 | |
stefank@2314 | 28 | #include "runtime/os.hpp" |
stefank@2314 | 29 | |
duke@435 | 30 | // Explicit C-heap memory management |
duke@435 | 31 | |
duke@435 | 32 | void trace_heap_malloc(size_t size, const char* name, void *p); |
duke@435 | 33 | void trace_heap_free(void *p); |
duke@435 | 34 | |
kvn@2562 | 35 | #ifndef PRODUCT |
kvn@2557 | 36 | // Increments unsigned long value for statistics (not atomic on MP). |
kvn@2557 | 37 | inline void inc_stat_counter(volatile julong* dest, julong add_value) { |
kvn@2562 | 38 | #if defined(SPARC) || defined(X86) |
kvn@2562 | 39 | // Sparc and X86 have atomic jlong (8 bytes) instructions |
kvn@2557 | 40 | julong value = Atomic::load((volatile jlong*)dest); |
kvn@2557 | 41 | value += add_value; |
kvn@2557 | 42 | Atomic::store((jlong)value, (volatile jlong*)dest); |
kvn@2562 | 43 | #else |
kvn@2562 | 44 | // possible word-tearing during load/store |
kvn@2562 | 45 | *dest += add_value; |
kvn@2562 | 46 | #endif |
kvn@2557 | 47 | } |
kvn@2562 | 48 | #endif |
duke@435 | 49 | |
duke@435 | 50 | // allocate using malloc; will fail if no memory available |
duke@435 | 51 | inline char* AllocateHeap(size_t size, const char* name = NULL) { |
duke@435 | 52 | char* p = (char*) os::malloc(size); |
duke@435 | 53 | #ifdef ASSERT |
duke@435 | 54 | if (PrintMallocFree) trace_heap_malloc(size, name, p); |
duke@435 | 55 | #else |
duke@435 | 56 | Unused_Variable(name); |
duke@435 | 57 | #endif |
duke@435 | 58 | if (p == NULL) vm_exit_out_of_memory(size, name); |
duke@435 | 59 | return p; |
duke@435 | 60 | } |
duke@435 | 61 | |
duke@435 | 62 | inline char* ReallocateHeap(char *old, size_t size, const char* name = NULL) { |
duke@435 | 63 | char* p = (char*) os::realloc(old,size); |
duke@435 | 64 | #ifdef ASSERT |
duke@435 | 65 | if (PrintMallocFree) trace_heap_malloc(size, name, p); |
duke@435 | 66 | #else |
duke@435 | 67 | Unused_Variable(name); |
duke@435 | 68 | #endif |
duke@435 | 69 | if (p == NULL) vm_exit_out_of_memory(size, name); |
duke@435 | 70 | return p; |
duke@435 | 71 | } |
duke@435 | 72 | |
duke@435 | 73 | inline void FreeHeap(void* p) { |
duke@435 | 74 | #ifdef ASSERT |
duke@435 | 75 | if (PrintMallocFree) trace_heap_free(p); |
duke@435 | 76 | #endif |
duke@435 | 77 | os::free(p); |
duke@435 | 78 | } |
stefank@2314 | 79 | |
stefank@2314 | 80 | #endif // SHARE_VM_MEMORY_ALLOCATION_INLINE_HPP |