Mercurial > hg > truffle
annotate src/share/vm/services/memoryPool.cpp @ 1721:413ad0331a0c
6977924: Changes for 6975078 produce build error with certain gcc versions
Summary: The changes introduced for 6975078 assign badHeapOopVal to the _allocation field in the ResourceObj class. In 32 bit linux builds with certain versions of gcc this assignment will be flagged as an error while compiling allocation.cpp. In 32 bit builds the constant value badHeapOopVal (which is cast to an intptr_t) is negative. The _allocation field is typed as an unsigned intptr_t and gcc catches this as an error.
Reviewed-by: jcoomes, ysr, phh
author | johnc |
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date | Wed, 18 Aug 2010 10:59:06 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_memoryPool.cpp.incl" | |
27 | |
28 MemoryPool::MemoryPool(const char* name, | |
29 PoolType type, | |
30 size_t init_size, | |
31 size_t max_size, | |
32 bool support_usage_threshold, | |
33 bool support_gc_threshold) { | |
34 _name = name; | |
35 _initial_size = init_size; | |
36 _max_size = max_size; | |
37 _memory_pool_obj = NULL; | |
38 _available_for_allocation = true; | |
39 _num_managers = 0; | |
40 _type = type; | |
41 | |
42 // initialize the max and init size of collection usage | |
43 _after_gc_usage = MemoryUsage(_initial_size, 0, 0, _max_size); | |
44 | |
45 _usage_sensor = NULL; | |
46 _gc_usage_sensor = NULL; | |
47 // usage threshold supports both high and low threshold | |
48 _usage_threshold = new ThresholdSupport(support_usage_threshold, support_usage_threshold); | |
49 // gc usage threshold supports only high threshold | |
50 _gc_usage_threshold = new ThresholdSupport(support_gc_threshold, support_gc_threshold); | |
51 } | |
52 | |
53 void MemoryPool::add_manager(MemoryManager* mgr) { | |
54 assert(_num_managers < MemoryPool::max_num_managers, "_num_managers exceeds the max"); | |
55 if (_num_managers < MemoryPool::max_num_managers) { | |
56 _managers[_num_managers] = mgr; | |
57 _num_managers++; | |
58 } | |
59 } | |
60 | |
61 | |
62 // Returns an instanceHandle of a MemoryPool object. | |
63 // It creates a MemoryPool instance when the first time | |
64 // this function is called. | |
65 instanceOop MemoryPool::get_memory_pool_instance(TRAPS) { | |
66 // Must do an acquire so as to force ordering of subsequent | |
67 // loads from anything _memory_pool_obj points to or implies. | |
68 instanceOop pool_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_pool_obj); | |
69 if (pool_obj == NULL) { | |
70 // It's ok for more than one thread to execute the code up to the locked region. | |
71 // Extra pool instances will just be gc'ed. | |
72 klassOop k = Management::sun_management_ManagementFactory_klass(CHECK_NULL); | |
73 instanceKlassHandle ik(THREAD, k); | |
74 | |
75 Handle pool_name = java_lang_String::create_from_str(_name, CHECK_NULL); | |
76 jlong usage_threshold_value = (_usage_threshold->is_high_threshold_supported() ? 0 : -1L); | |
77 jlong gc_usage_threshold_value = (_gc_usage_threshold->is_high_threshold_supported() ? 0 : -1L); | |
78 | |
79 JavaValue result(T_OBJECT); | |
80 JavaCallArguments args; | |
81 args.push_oop(pool_name); // Argument 1 | |
82 args.push_int((int) is_heap()); // Argument 2 | |
83 | |
84 symbolHandle method_name = vmSymbolHandles::createMemoryPool_name(); | |
85 symbolHandle signature = vmSymbolHandles::createMemoryPool_signature(); | |
86 | |
87 args.push_long(usage_threshold_value); // Argument 3 | |
88 args.push_long(gc_usage_threshold_value); // Argument 4 | |
89 | |
90 JavaCalls::call_static(&result, | |
91 ik, | |
92 method_name, | |
93 signature, | |
94 &args, | |
95 CHECK_NULL); | |
96 | |
97 instanceOop p = (instanceOop) result.get_jobject(); | |
98 instanceHandle pool(THREAD, p); | |
99 | |
100 { | |
101 // Get lock since another thread may have create the instance | |
102 MutexLocker ml(Management_lock); | |
103 | |
104 // Check if another thread has created the pool. We reload | |
105 // _memory_pool_obj here because some other thread may have | |
106 // initialized it while we were executing the code before the lock. | |
107 // | |
108 // The lock has done an acquire, so the load can't float above it, | |
109 // but we need to do a load_acquire as above. | |
110 pool_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_pool_obj); | |
111 if (pool_obj != NULL) { | |
112 return pool_obj; | |
113 } | |
114 | |
115 // Get the address of the object we created via call_special. | |
116 pool_obj = pool(); | |
117 | |
118 // Use store barrier to make sure the memory accesses associated | |
119 // with creating the pool are visible before publishing its address. | |
120 // The unlock will publish the store to _memory_pool_obj because | |
121 // it does a release first. | |
122 OrderAccess::release_store_ptr(&_memory_pool_obj, pool_obj); | |
123 } | |
124 } | |
125 | |
126 return pool_obj; | |
127 } | |
128 | |
129 inline static size_t get_max_value(size_t val1, size_t val2) { | |
130 return (val1 > val2 ? val1 : val2); | |
131 } | |
132 | |
133 void MemoryPool::record_peak_memory_usage() { | |
134 // Caller in JDK is responsible for synchronization - | |
135 // acquire the lock for this memory pool before calling VM | |
136 MemoryUsage usage = get_memory_usage(); | |
137 size_t peak_used = get_max_value(usage.used(), _peak_usage.used()); | |
138 size_t peak_committed = get_max_value(usage.committed(), _peak_usage.committed()); | |
139 size_t peak_max_size = get_max_value(usage.max_size(), _peak_usage.max_size()); | |
140 | |
141 _peak_usage = MemoryUsage(initial_size(), peak_used, peak_committed, peak_max_size); | |
142 } | |
143 | |
144 static void set_sensor_obj_at(SensorInfo** sensor_ptr, instanceHandle sh) { | |
145 assert(*sensor_ptr == NULL, "Should be called only once"); | |
146 SensorInfo* sensor = new SensorInfo(); | |
147 sensor->set_sensor(sh()); | |
148 *sensor_ptr = sensor; | |
149 } | |
150 | |
151 void MemoryPool::set_usage_sensor_obj(instanceHandle sh) { | |
152 set_sensor_obj_at(&_usage_sensor, sh); | |
153 } | |
154 | |
155 void MemoryPool::set_gc_usage_sensor_obj(instanceHandle sh) { | |
156 set_sensor_obj_at(&_gc_usage_sensor, sh); | |
157 } | |
158 | |
159 void MemoryPool::oops_do(OopClosure* f) { | |
160 f->do_oop((oop*) &_memory_pool_obj); | |
161 if (_usage_sensor != NULL) { | |
162 _usage_sensor->oops_do(f); | |
163 } | |
164 if (_gc_usage_sensor != NULL) { | |
165 _gc_usage_sensor->oops_do(f); | |
166 } | |
167 } | |
168 | |
169 ContiguousSpacePool::ContiguousSpacePool(ContiguousSpace* space, | |
170 const char* name, | |
171 PoolType type, | |
172 size_t max_size, | |
173 bool support_usage_threshold) : | |
174 CollectedMemoryPool(name, type, space->capacity(), max_size, | |
175 support_usage_threshold), _space(space) { | |
176 } | |
177 | |
178 MemoryUsage ContiguousSpacePool::get_memory_usage() { | |
179 size_t maxSize = (available_for_allocation() ? max_size() : 0); | |
180 size_t used = used_in_bytes(); | |
181 size_t committed = _space->capacity(); | |
182 | |
183 return MemoryUsage(initial_size(), used, committed, maxSize); | |
184 } | |
185 | |
186 SurvivorContiguousSpacePool::SurvivorContiguousSpacePool(DefNewGeneration* gen, | |
187 const char* name, | |
188 PoolType type, | |
189 size_t max_size, | |
190 bool support_usage_threshold) : | |
191 CollectedMemoryPool(name, type, gen->from()->capacity(), max_size, | |
192 support_usage_threshold), _gen(gen) { | |
193 } | |
194 | |
195 MemoryUsage SurvivorContiguousSpacePool::get_memory_usage() { | |
196 size_t maxSize = (available_for_allocation() ? max_size() : 0); | |
197 size_t used = used_in_bytes(); | |
198 size_t committed = committed_in_bytes(); | |
199 | |
200 return MemoryUsage(initial_size(), used, committed, maxSize); | |
201 } | |
202 | |
203 #ifndef SERIALGC | |
204 CompactibleFreeListSpacePool::CompactibleFreeListSpacePool(CompactibleFreeListSpace* space, | |
205 const char* name, | |
206 PoolType type, | |
207 size_t max_size, | |
208 bool support_usage_threshold) : | |
209 CollectedMemoryPool(name, type, space->capacity(), max_size, | |
210 support_usage_threshold), _space(space) { | |
211 } | |
212 | |
213 MemoryUsage CompactibleFreeListSpacePool::get_memory_usage() { | |
214 size_t maxSize = (available_for_allocation() ? max_size() : 0); | |
215 size_t used = used_in_bytes(); | |
216 size_t committed = _space->capacity(); | |
217 | |
218 return MemoryUsage(initial_size(), used, committed, maxSize); | |
219 } | |
220 #endif // SERIALGC | |
221 | |
222 GenerationPool::GenerationPool(Generation* gen, | |
223 const char* name, | |
224 PoolType type, | |
225 bool support_usage_threshold) : | |
226 CollectedMemoryPool(name, type, gen->capacity(), gen->max_capacity(), | |
227 support_usage_threshold), _gen(gen) { | |
228 } | |
229 | |
230 MemoryUsage GenerationPool::get_memory_usage() { | |
231 size_t used = used_in_bytes(); | |
232 size_t committed = _gen->capacity(); | |
233 size_t maxSize = (available_for_allocation() ? max_size() : 0); | |
234 | |
235 return MemoryUsage(initial_size(), used, committed, maxSize); | |
236 } | |
237 | |
238 CodeHeapPool::CodeHeapPool(CodeHeap* codeHeap, const char* name, bool support_usage_threshold) : | |
239 MemoryPool(name, NonHeap, codeHeap->capacity(), codeHeap->max_capacity(), | |
240 support_usage_threshold, false), _codeHeap(codeHeap) { | |
241 } | |
242 | |
243 MemoryUsage CodeHeapPool::get_memory_usage() { | |
244 size_t used = used_in_bytes(); | |
245 size_t committed = _codeHeap->capacity(); | |
246 size_t maxSize = (available_for_allocation() ? max_size() : 0); | |
247 | |
248 return MemoryUsage(initial_size(), used, committed, maxSize); | |
249 } |