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comparison src/share/vm/prims/whitebox.cpp @ 7971:4102b59539ce

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8005012: Add WB APIs to better support NMT testing Summary: Add WB API functions to enable better NMT testing Reviewed-by: dholmes, zgu
author ctornqvi
date Fri, 01 Feb 2013 23:48:08 +0100
parents da91efe96a93
children 3c9bc17b9403
comparison
equal deleted inserted replaced
7962:4c75576d18d0 7971:4102b59539ce
40 #ifndef SERIALGC 40 #ifndef SERIALGC
41 #include "gc_implementation/g1/concurrentMark.hpp" 41 #include "gc_implementation/g1/concurrentMark.hpp"
42 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" 42 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
43 #include "gc_implementation/g1/heapRegionRemSet.hpp" 43 #include "gc_implementation/g1/heapRegionRemSet.hpp"
44 #endif // !SERIALGC 44 #endif // !SERIALGC
45
46 #ifdef INCLUDE_NMT
47 #include "services/memTracker.hpp"
48 #endif // INCLUDE_NMT
45 49
46 bool WhiteBox::_used = false; 50 bool WhiteBox::_used = false;
47 51
48 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj)) 52 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
49 return (jlong)(void*)JNIHandles::resolve(obj); 53 return (jlong)(void*)JNIHandles::resolve(obj);
107 111
108 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o)) 112 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
109 return (jint)HeapRegion::GrainBytes; 113 return (jint)HeapRegion::GrainBytes;
110 WB_END 114 WB_END
111 #endif // !SERIALGC 115 #endif // !SERIALGC
116
117 #ifdef INCLUDE_NMT
118 // Keep track of the 3 allocations in NMTAllocTest so we can free them later
119 // on and verify that they're not visible anymore
120 static void* nmtMtTest1 = NULL, *nmtMtTest2 = NULL, *nmtMtTest3 = NULL;
121
122 // Alloc memory using the test memory type so that we can use that to see if
123 // NMT picks it up correctly
124 WB_ENTRY(jboolean, WB_NMTAllocTest(JNIEnv* env))
125 void *mem;
126
127 if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) {
128 return false;
129 }
130
131 // Allocate 2 * 128k + 256k + 1024k and free the 1024k one to make sure we track
132 // everything correctly. Total should be 512k held alive.
133 nmtMtTest1 = os::malloc(128 * 1024, mtTest);
134 mem = os::malloc(1024 * 1024, mtTest);
135 nmtMtTest2 = os::malloc(256 * 1024, mtTest);
136 os::free(mem, mtTest);
137 nmtMtTest3 = os::malloc(128 * 1024, mtTest);
138
139 return true;
140 WB_END
141
142 // Free the memory allocated by NMTAllocTest
143 WB_ENTRY(jboolean, WB_NMTFreeTestMemory(JNIEnv* env))
144
145 if (nmtMtTest1 == NULL || nmtMtTest2 == NULL || nmtMtTest3 == NULL) {
146 return false;
147 }
148
149 os::free(nmtMtTest1, mtTest);
150 nmtMtTest1 = NULL;
151 os::free(nmtMtTest2, mtTest);
152 nmtMtTest2 = NULL;
153 os::free(nmtMtTest3, mtTest);
154 nmtMtTest3 = NULL;
155
156 return true;
157 WB_END
158
159 // Block until the current generation of NMT data to be merged, used to reliably test the NMT feature
160 WB_ENTRY(jboolean, WB_NMTWaitForDataMerge(JNIEnv* env))
161
162 if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) {
163 return false;
164 }
165
166 return MemTracker::wbtest_wait_for_data_merge();
167 WB_END
168
169 #endif // INCLUDE_NMT
112 170
113 //Some convenience methods to deal with objects from java 171 //Some convenience methods to deal with objects from java
114 int WhiteBox::offset_for_field(const char* field_name, oop object, 172 int WhiteBox::offset_for_field(const char* field_name, oop object,
115 Symbol* signature_symbol) { 173 Symbol* signature_symbol) {
116 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid"); 174 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
175 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark}, 233 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
176 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous }, 234 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
177 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions }, 235 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
178 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize }, 236 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
179 #endif // !SERIALGC 237 #endif // !SERIALGC
238 #ifdef INCLUDE_NMT
239 {CC"NMTAllocTest", CC"()Z", (void*)&WB_NMTAllocTest },
240 {CC"NMTFreeTestMemory", CC"()Z", (void*)&WB_NMTFreeTestMemory },
241 {CC"NMTWaitForDataMerge",CC"()Z", (void*)&WB_NMTWaitForDataMerge},
242 #endif // INCLUDE_NMT
180 }; 243 };
181 244
182 #undef CC 245 #undef CC
183 246
184 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass)) 247 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))