1 /*
2 * Copyright (c) 1997, 2013, 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/atomic.inline.hpp"
29 #include "runtime/os.hpp"
30
31 // Explicit C-heap memory management
32
33 void trace_heap_malloc(size_t size, const char* name, void *p);
34 void trace_heap_free(void *p);
35
36 #ifndef PRODUCT
37 // Increments unsigned long value for statistics (not atomic on MP).
38 inline void inc_stat_counter(volatile julong* dest, julong add_value) {
39 #if defined(SPARC) || defined(X86)
40 // Sparc and X86 have atomic jlong (8 bytes) instructions
41 julong value = Atomic::load((volatile jlong*)dest);
42 value += add_value;
43 Atomic::store((jlong)value, (volatile jlong*)dest);
44 #else
45 // possible word-tearing during load/store
46 *dest += add_value;
47 #endif
48 }
49 #endif
50
51 // allocate using malloc; will fail if no memory available
52 inline char* AllocateHeap(size_t size, MEMFLAGS flags, address pc = 0,
53 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) {
54 if (pc == 0) {
55 pc = CURRENT_PC;
56 }
57 char* p = (char*) os::malloc(size, flags, pc);
58 #ifdef ASSERT
59 if (PrintMallocFree) trace_heap_malloc(size, "AllocateHeap", p);
60 #endif
61 if (p == NULL && alloc_failmode == AllocFailStrategy::EXIT_OOM) {
62 vm_exit_out_of_memory(size, OOM_MALLOC_ERROR, "AllocateHeap");
63 }
64 return p;
65 }
66
67 inline char* ReallocateHeap(char *old, size_t size, MEMFLAGS flags,
68 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) {
69 char* p = (char*) os::realloc(old, size, flags, CURRENT_PC);
70 #ifdef ASSERT
71 if (PrintMallocFree) trace_heap_malloc(size, "ReallocateHeap", p);
72 #endif
73 if (p == NULL && alloc_failmode == AllocFailStrategy::EXIT_OOM) {
74 vm_exit_out_of_memory(size, OOM_MALLOC_ERROR, "ReallocateHeap");
75 }
76 return p;
77 }
78
79 inline void FreeHeap(void* p, MEMFLAGS memflags = mtInternal) {
80 #ifdef ASSERT
81 if (PrintMallocFree) trace_heap_free(p);
82 #endif
83 os::free(p, memflags);
84 }
85
86
87 template <MEMFLAGS F> void* CHeapObj<F>::operator new(size_t size,
88 address caller_pc) throw() {
89 void* p = (void*)AllocateHeap(size, F, (caller_pc != 0 ? caller_pc : CALLER_PC));
90 #ifdef ASSERT
91 if (PrintMallocFree) trace_heap_malloc(size, "CHeapObj-new", p);
92 #endif
93 return p;
94 }
95
96 template <MEMFLAGS F> void* CHeapObj<F>::operator new (size_t size,
97 const std::nothrow_t& nothrow_constant, address caller_pc) throw() {
98 void* p = (void*)AllocateHeap(size, F, (caller_pc != 0 ? caller_pc : CALLER_PC),
99 AllocFailStrategy::RETURN_NULL);
100 #ifdef ASSERT
101 if (PrintMallocFree) trace_heap_malloc(size, "CHeapObj-new", p);
102 #endif
103 return p;
104 }
105
106 template <MEMFLAGS F> void* CHeapObj<F>::operator new [](size_t size,
107 address caller_pc) throw() {
108 return CHeapObj<F>::operator new(size, caller_pc);
109 }
110
111 template <MEMFLAGS F> void* CHeapObj<F>::operator new [](size_t size,
112 const std::nothrow_t& nothrow_constant, address caller_pc) throw() {
113 return CHeapObj<F>::operator new(size, nothrow_constant, caller_pc);
114 }
115
116 template <MEMFLAGS F> void CHeapObj<F>::operator delete(void* p){
117 FreeHeap(p, F);
118 }
119
120 template <MEMFLAGS F> void CHeapObj<F>::operator delete [](void* p){
121 FreeHeap(p, F);
122 }
123
124 template <class E, MEMFLAGS F>
125 E* ArrayAllocator<E, F>::allocate(size_t length) {
126 assert(_addr == NULL, "Already in use");
127
128 _size = sizeof(E) * length;
129 _use_malloc = _size < ArrayAllocatorMallocLimit;
130
131 if (_use_malloc) {
132 _addr = AllocateHeap(_size, F);
133 if (_addr == NULL && _size >= (size_t)os::vm_allocation_granularity()) {
134 // malloc failed let's try with mmap instead
135 _use_malloc = false;
136 } else {
137 return (E*)_addr;
138 }
139 }
140
141 int alignment = os::vm_allocation_granularity();
142 _size = align_size_up(_size, alignment);
143
144 _addr = os::reserve_memory(_size, NULL, alignment, F);
145 if (_addr == NULL) {
146 vm_exit_out_of_memory(_size, OOM_MMAP_ERROR, "Allocator (reserve)");
147 }
148
149 os::commit_memory_or_exit(_addr, _size, !ExecMem, "Allocator (commit)");
150
151 return (E*)_addr;
152 }
153
154 template<class E, MEMFLAGS F>
155 void ArrayAllocator<E, F>::free() {
156 if (_addr != NULL) {
157 if (_use_malloc) {
158 FreeHeap(_addr, F);
159 } else {
160 os::release_memory(_addr, _size);
161 }
162 _addr = NULL;
163 }
164 }
165
166 #endif // SHARE_VM_MEMORY_ALLOCATION_INLINE_HPP