1 /* 2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_MEMORY_ALLOCATION_INLINE_HPP 26 #define SHARE_VM_MEMORY_ALLOCATION_INLINE_HPP 27 28 #include "runtime/os.hpp" 29 30 // Explicit C-heap memory management 31 32 void trace_heap_malloc(size_t size, const char* name, void *p); 33 void trace_heap_free(void *p); 34 35 #ifndef PRODUCT 36 // Increments unsigned long value for statistics (not atomic on MP). 37 inline void inc_stat_counter(volatile julong* dest, julong add_value) { 38 #if defined(SPARC) || defined(X86) 39 // Sparc and X86 have atomic jlong (8 bytes) instructions 40 julong value = Atomic::load((volatile jlong*)dest); 41 value += add_value; 42 Atomic::store((jlong)value, (volatile jlong*)dest); 43 #else 44 // possible word-tearing during load/store 45 *dest += add_value; 46 #endif 47 } 48 #endif 49 50 // allocate using malloc; will fail if no memory available 51 inline char* AllocateHeap(size_t size, MEMFLAGS flags, address pc = 0, 52 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { 53 if (pc == 0) { 54 pc = CURRENT_PC; 55 } 56 char* p = (char*) os::malloc(size, flags, pc); 57 #ifdef ASSERT 58 if (PrintMallocFree) trace_heap_malloc(size, "AllocateHeap", p); 59 #endif 60 if (p == NULL && alloc_failmode == AllocFailStrategy::EXIT_OOM) vm_exit_out_of_memory(size, "AllocateHeap"); 61 return p; 62 } 63 64 inline char* ReallocateHeap(char *old, size_t size, MEMFLAGS flags, 65 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { 66 char* p = (char*) os::realloc(old, size, flags, CURRENT_PC); 67 #ifdef ASSERT 68 if (PrintMallocFree) trace_heap_malloc(size, "ReallocateHeap", p); 69 #endif 70 if (p == NULL && alloc_failmode == AllocFailStrategy::EXIT_OOM) vm_exit_out_of_memory(size, "ReallocateHeap"); 71 return p; 72 } 73 74 inline void FreeHeap(void* p, MEMFLAGS memflags = mtInternal) { 75 #ifdef ASSERT 76 if (PrintMallocFree) trace_heap_free(p); 77 #endif 78 os::free(p, memflags); 79 } 80 81 82 template <MEMFLAGS F> void* CHeapObj<F>::operator new(size_t size, 83 address caller_pc){ 84 #ifdef ASSERT 85 void* p = (void*)AllocateHeap(size, F, (caller_pc != 0 ? caller_pc : CALLER_PC)); 86 if (PrintMallocFree) trace_heap_malloc(size, "CHeapObj-new", p); 87 return p; 88 #else 89 return (void *) AllocateHeap(size, F, (caller_pc != 0 ? caller_pc : CALLER_PC)); 90 #endif 91 } 92 93 template <MEMFLAGS F> void* CHeapObj<F>::operator new (size_t size, 94 const std::nothrow_t& nothrow_constant, address caller_pc) { 95 #ifdef ASSERT 96 void* p = (void*)AllocateHeap(size, F, (caller_pc != 0 ? caller_pc : CALLER_PC), 97 AllocFailStrategy::RETURN_NULL); 98 if (PrintMallocFree) trace_heap_malloc(size, "CHeapObj-new", p); 99 return p; 100 #else 101 return (void *) AllocateHeap(size, F, (caller_pc != 0 ? caller_pc : CALLER_PC), 102 AllocFailStrategy::RETURN_NULL); 103 #endif 104 } 105 106 template <MEMFLAGS F> void CHeapObj<F>::operator delete(void* p){ 107 FreeHeap(p, F); 108 } 109 110 111 #endif // SHARE_VM_MEMORY_ALLOCATION_INLINE_HPP