1 /*
2 * Copyright (c) 1997, 2017, 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 #include "precompiled.hpp"
26 #include "gc/shared/genCollectedHeap.hpp"
27 #include "memory/allocation.hpp"
28 #include "memory/allocation.inline.hpp"
29 #include "memory/arena.hpp"
30 #include "memory/metaspaceShared.hpp"
31 #include "memory/resourceArea.hpp"
32 #include "memory/universe.hpp"
33 #include "runtime/atomic.hpp"
34 #include "runtime/os.hpp"
35 #include "runtime/task.hpp"
36 #include "runtime/threadCritical.hpp"
37 #include "services/memTracker.hpp"
38 #include "utilities/ostream.hpp"
39
40 void* StackObj::operator new(size_t size) throw() { ShouldNotCallThis(); return 0; }
41 void StackObj::operator delete(void* p) { ShouldNotCallThis(); }
42 void* StackObj::operator new [](size_t size) throw() { ShouldNotCallThis(); return 0; }
43 void StackObj::operator delete [](void* p) { ShouldNotCallThis(); }
44
45 void* _ValueObj::operator new(size_t size) throw() { ShouldNotCallThis(); return 0; }
46 void _ValueObj::operator delete(void* p) { ShouldNotCallThis(); }
47 void* _ValueObj::operator new [](size_t size) throw() { ShouldNotCallThis(); return 0; }
48 void _ValueObj::operator delete [](void* p) { ShouldNotCallThis(); }
49
50 void* MetaspaceObj::operator new(size_t size, ClassLoaderData* loader_data,
51 size_t word_size,
52 MetaspaceObj::Type type, TRAPS) throw() {
53 // Klass has it's own operator new
54 return Metaspace::allocate(loader_data, word_size, type, THREAD);
55 }
56
57 bool MetaspaceObj::is_shared() const {
58 return MetaspaceShared::is_in_shared_space(this);
59 }
60
61 bool MetaspaceObj::is_metaspace_object() const {
62 return Metaspace::contains((void*)this);
63 }
64
65 void MetaspaceObj::print_address_on(outputStream* st) const {
66 st->print(" {" INTPTR_FORMAT "}", p2i(this));
67 }
68
69 void* ResourceObj::operator new(size_t size, Arena *arena) throw() {
70 address res = (address)arena->Amalloc(size);
71 DEBUG_ONLY(set_allocation_type(res, ARENA);)
72 return res;
73 }
74
75 void* ResourceObj::operator new [](size_t size, Arena *arena) throw() {
76 address res = (address)arena->Amalloc(size);
77 DEBUG_ONLY(set_allocation_type(res, ARENA);)
78 return res;
79 }
80
81 void* ResourceObj::operator new(size_t size, allocation_type type, MEMFLAGS flags) throw() {
82 address res = NULL;
83 switch (type) {
84 case C_HEAP:
85 res = (address)AllocateHeap(size, flags, CALLER_PC);
86 DEBUG_ONLY(set_allocation_type(res, C_HEAP);)
87 break;
88 case RESOURCE_AREA:
89 // new(size) sets allocation type RESOURCE_AREA.
90 res = (address)operator new(size);
91 break;
92 default:
93 ShouldNotReachHere();
94 }
95 return res;
96 }
97
98 void* ResourceObj::operator new [](size_t size, allocation_type type, MEMFLAGS flags) throw() {
99 return (address) operator new(size, type, flags);
100 }
101
102 void* ResourceObj::operator new(size_t size, const std::nothrow_t& nothrow_constant,
103 allocation_type type, MEMFLAGS flags) throw() {
104 // should only call this with std::nothrow, use other operator new() otherwise
105 address res = NULL;
106 switch (type) {
107 case C_HEAP:
108 res = (address)AllocateHeap(size, flags, CALLER_PC, AllocFailStrategy::RETURN_NULL);
109 DEBUG_ONLY(if (res!= NULL) set_allocation_type(res, C_HEAP);)
110 break;
111 case RESOURCE_AREA:
112 // new(size) sets allocation type RESOURCE_AREA.
113 res = (address)operator new(size, std::nothrow);
114 break;
115 default:
116 ShouldNotReachHere();
117 }
118 return res;
119 }
120
121 void* ResourceObj::operator new [](size_t size, const std::nothrow_t& nothrow_constant,
122 allocation_type type, MEMFLAGS flags) throw() {
123 return (address)operator new(size, nothrow_constant, type, flags);
124 }
125
126 void ResourceObj::operator delete(void* p) {
127 assert(((ResourceObj *)p)->allocated_on_C_heap(),
128 "delete only allowed for C_HEAP objects");
129 DEBUG_ONLY(((ResourceObj *)p)->_allocation_t[0] = (uintptr_t)badHeapOopVal;)
130 FreeHeap(p);
131 }
132
133 void ResourceObj::operator delete [](void* p) {
134 operator delete(p);
135 }
136
137 #ifdef ASSERT
138 void ResourceObj::set_allocation_type(address res, allocation_type type) {
139 // Set allocation type in the resource object
140 uintptr_t allocation = (uintptr_t)res;
141 assert((allocation & allocation_mask) == 0, "address should be aligned to 4 bytes at least: " INTPTR_FORMAT, p2i(res));
142 assert(type <= allocation_mask, "incorrect allocation type");
143 ResourceObj* resobj = (ResourceObj *)res;
144 resobj->_allocation_t[0] = ~(allocation + type);
145 if (type != STACK_OR_EMBEDDED) {
146 // Called from operator new() and CollectionSetChooser(),
147 // set verification value.
148 resobj->_allocation_t[1] = (uintptr_t)&(resobj->_allocation_t[1]) + type;
149 }
150 }
151
152 ResourceObj::allocation_type ResourceObj::get_allocation_type() const {
153 assert(~(_allocation_t[0] | allocation_mask) == (uintptr_t)this, "lost resource object");
154 return (allocation_type)((~_allocation_t[0]) & allocation_mask);
155 }
156
157 bool ResourceObj::is_type_set() const {
158 allocation_type type = (allocation_type)(_allocation_t[1] & allocation_mask);
159 return get_allocation_type() == type &&
160 (_allocation_t[1] - type) == (uintptr_t)(&_allocation_t[1]);
161 }
162
163 ResourceObj::ResourceObj() { // default constructor
164 if (~(_allocation_t[0] | allocation_mask) != (uintptr_t)this) {
165 // Operator new() is not called for allocations
166 // on stack and for embedded objects.
167 set_allocation_type((address)this, STACK_OR_EMBEDDED);
168 } else if (allocated_on_stack()) { // STACK_OR_EMBEDDED
169 // For some reason we got a value which resembles
170 // an embedded or stack object (operator new() does not
171 // set such type). Keep it since it is valid value
172 // (even if it was garbage).
173 // Ignore garbage in other fields.
174 } else if (is_type_set()) {
175 // Operator new() was called and type was set.
176 assert(!allocated_on_stack(),
177 "not embedded or stack, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")",
178 p2i(this), get_allocation_type(), _allocation_t[0], _allocation_t[1]);
179 } else {
180 // Operator new() was not called.
181 // Assume that it is embedded or stack object.
182 set_allocation_type((address)this, STACK_OR_EMBEDDED);
183 }
184 _allocation_t[1] = 0; // Zap verification value
185 }
186
187 ResourceObj::ResourceObj(const ResourceObj& r) { // default copy constructor
188 // Used in ClassFileParser::parse_constant_pool_entries() for ClassFileStream.
189 // Note: garbage may resembles valid value.
190 assert(~(_allocation_t[0] | allocation_mask) != (uintptr_t)this || !is_type_set(),
191 "embedded or stack only, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")",
192 p2i(this), get_allocation_type(), _allocation_t[0], _allocation_t[1]);
193 set_allocation_type((address)this, STACK_OR_EMBEDDED);
194 _allocation_t[1] = 0; // Zap verification value
195 }
196
197 ResourceObj& ResourceObj::operator=(const ResourceObj& r) { // default copy assignment
198 // Used in InlineTree::ok_to_inline() for WarmCallInfo.
199 assert(allocated_on_stack(),
200 "copy only into local, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")",
201 p2i(this), get_allocation_type(), _allocation_t[0], _allocation_t[1]);
202 // Keep current _allocation_t value;
203 return *this;
204 }
205
206 ResourceObj::~ResourceObj() {
207 // allocated_on_C_heap() also checks that encoded (in _allocation) address == this.
208 if (!allocated_on_C_heap()) { // ResourceObj::delete() will zap _allocation for C_heap.
209 _allocation_t[0] = (uintptr_t)badHeapOopVal; // zap type
210 }
211 }
212 #endif // ASSERT
213
214
215 void trace_heap_malloc(size_t size, const char* name, void* p) {
216 // A lock is not needed here - tty uses a lock internally
217 tty->print_cr("Heap malloc " INTPTR_FORMAT " " SIZE_FORMAT " %s", p2i(p), size, name == NULL ? "" : name);
218 }
219
220
221 void trace_heap_free(void* p) {
222 // A lock is not needed here - tty uses a lock internally
223 tty->print_cr("Heap free " INTPTR_FORMAT, p2i(p));
224 }
225
226 //--------------------------------------------------------------------------------------
227 // Non-product code
228
229 #ifndef PRODUCT
230 void AllocatedObj::print() const { print_on(tty); }
231 void AllocatedObj::print_value() const { print_value_on(tty); }
232
233 void AllocatedObj::print_on(outputStream* st) const {
234 st->print_cr("AllocatedObj(" INTPTR_FORMAT ")", p2i(this));
235 }
236
237 void AllocatedObj::print_value_on(outputStream* st) const {
238 st->print("AllocatedObj(" INTPTR_FORMAT ")", p2i(this));
239 }
240
241 AllocStats::AllocStats() {
242 start_mallocs = os::num_mallocs;
243 start_frees = os::num_frees;
244 start_malloc_bytes = os::alloc_bytes;
245 start_mfree_bytes = os::free_bytes;
246 start_res_bytes = Arena::_bytes_allocated;
247 }
248
249 julong AllocStats::num_mallocs() { return os::num_mallocs - start_mallocs; }
250 julong AllocStats::alloc_bytes() { return os::alloc_bytes - start_malloc_bytes; }
251 julong AllocStats::num_frees() { return os::num_frees - start_frees; }
252 julong AllocStats::free_bytes() { return os::free_bytes - start_mfree_bytes; }
253 julong AllocStats::resource_bytes() { return Arena::_bytes_allocated - start_res_bytes; }
254 void AllocStats::print() {
255 tty->print_cr(UINT64_FORMAT " mallocs (" UINT64_FORMAT "MB), "
256 UINT64_FORMAT " frees (" UINT64_FORMAT "MB), " UINT64_FORMAT "MB resrc",
257 num_mallocs(), alloc_bytes()/M, num_frees(), free_bytes()/M, resource_bytes()/M);
258 }
259
260 ReallocMark::ReallocMark() {
261 #ifdef ASSERT
262 Thread *thread = Thread::current();
263 _nesting = thread->resource_area()->nesting();
264 #endif
265 }
266
267 void ReallocMark::check() {
268 #ifdef ASSERT
269 if (_nesting != Thread::current()->resource_area()->nesting()) {
270 fatal("allocation bug: array could grow within nested ResourceMark");
271 }
272 #endif
273 }
274
275 #endif // Non-product