26
27 #include "memory/universe.hpp"
28 #include "oops/oop.inline.hpp"
29
30 #include "classfile/symbolTable.hpp"
31 #include "classfile/classLoaderData.hpp"
32
33 #include "prims/whitebox.hpp"
34 #include "prims/wbtestmethods/parserTests.hpp"
35
36 #include "runtime/interfaceSupport.hpp"
37 #include "runtime/os.hpp"
38 #include "utilities/debug.hpp"
39
40 #ifndef SERIALGC
41 #include "gc_implementation/g1/concurrentMark.hpp"
42 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
43 #include "gc_implementation/g1/heapRegionRemSet.hpp"
44 #endif // !SERIALGC
45
46 bool WhiteBox::_used = false;
47
48 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
49 return (jlong)(void*)JNIHandles::resolve(obj);
50 WB_END
51
52 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
53 return heapOopSize;
54 WB_END
55
56
57 class WBIsKlassAliveClosure : public KlassClosure {
58 Symbol* _name;
59 bool _found;
60 public:
61 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
62
63 void do_klass(Klass* k) {
64 if (_found) return;
65 Symbol* ksym = k->name();
93 return hr->isHumongous();
94 WB_END
95
96 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
97 G1CollectedHeap* g1 = G1CollectedHeap::heap();
98 size_t nr = g1->free_regions();
99 return (jlong)nr;
100 WB_END
101
102 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
103 G1CollectedHeap* g1 = G1CollectedHeap::heap();
104 ConcurrentMark* cm = g1->concurrent_mark();
105 return cm->concurrent_marking_in_progress();
106 WB_END
107
108 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
109 return (jint)HeapRegion::GrainBytes;
110 WB_END
111 #endif // !SERIALGC
112
113 //Some convenience methods to deal with objects from java
114 int WhiteBox::offset_for_field(const char* field_name, oop object,
115 Symbol* signature_symbol) {
116 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
117 Thread* THREAD = Thread::current();
118
119 //Get the class of our object
120 Klass* arg_klass = object->klass();
121 //Turn it into an instance-klass
122 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
123
124 //Create symbols to look for in the class
125 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
126 THREAD);
127
128 //To be filled in with an offset of the field we're looking for
129 fieldDescriptor fd;
130
131 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
132 if (res == NULL) {
160 return ret;
161 }
162
163
164 #define CC (char*)
165
166 static JNINativeMethod methods[] = {
167 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
168 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
169 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
170 {CC "parseCommandLine",
171 CC "(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
172 (void*) &WB_ParseCommandLine
173 },
174 #ifndef SERIALGC
175 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
176 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
177 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
178 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
179 #endif // !SERIALGC
180 };
181
182 #undef CC
183
184 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
185 {
186 if (WhiteBoxAPI) {
187 // Make sure that wbclass is loaded by the null classloader
188 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
189 Handle loader(ikh->class_loader());
190 if (loader.is_null()) {
191 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
192 jint result = env->RegisterNatives(wbclass, methods, sizeof(methods)/sizeof(methods[0]));
193 if (result == 0) {
194 WhiteBox::set_used();
195 }
196 }
197 }
198 }
199 JVM_END
|
26
27 #include "memory/universe.hpp"
28 #include "oops/oop.inline.hpp"
29
30 #include "classfile/symbolTable.hpp"
31 #include "classfile/classLoaderData.hpp"
32
33 #include "prims/whitebox.hpp"
34 #include "prims/wbtestmethods/parserTests.hpp"
35
36 #include "runtime/interfaceSupport.hpp"
37 #include "runtime/os.hpp"
38 #include "utilities/debug.hpp"
39
40 #ifndef SERIALGC
41 #include "gc_implementation/g1/concurrentMark.hpp"
42 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
43 #include "gc_implementation/g1/heapRegionRemSet.hpp"
44 #endif // !SERIALGC
45
46 #ifdef INCLUDE_NMT
47 #include "services/memTracker.hpp"
48 #endif // INCLUDE_NMT
49
50 bool WhiteBox::_used = false;
51
52 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
53 return (jlong)(void*)JNIHandles::resolve(obj);
54 WB_END
55
56 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
57 return heapOopSize;
58 WB_END
59
60
61 class WBIsKlassAliveClosure : public KlassClosure {
62 Symbol* _name;
63 bool _found;
64 public:
65 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
66
67 void do_klass(Klass* k) {
68 if (_found) return;
69 Symbol* ksym = k->name();
97 return hr->isHumongous();
98 WB_END
99
100 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
101 G1CollectedHeap* g1 = G1CollectedHeap::heap();
102 size_t nr = g1->free_regions();
103 return (jlong)nr;
104 WB_END
105
106 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
107 G1CollectedHeap* g1 = G1CollectedHeap::heap();
108 ConcurrentMark* cm = g1->concurrent_mark();
109 return cm->concurrent_marking_in_progress();
110 WB_END
111
112 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
113 return (jint)HeapRegion::GrainBytes;
114 WB_END
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
170
171 //Some convenience methods to deal with objects from java
172 int WhiteBox::offset_for_field(const char* field_name, oop object,
173 Symbol* signature_symbol) {
174 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
175 Thread* THREAD = Thread::current();
176
177 //Get the class of our object
178 Klass* arg_klass = object->klass();
179 //Turn it into an instance-klass
180 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
181
182 //Create symbols to look for in the class
183 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
184 THREAD);
185
186 //To be filled in with an offset of the field we're looking for
187 fieldDescriptor fd;
188
189 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
190 if (res == NULL) {
218 return ret;
219 }
220
221
222 #define CC (char*)
223
224 static JNINativeMethod methods[] = {
225 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
226 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
227 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
228 {CC "parseCommandLine",
229 CC "(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
230 (void*) &WB_ParseCommandLine
231 },
232 #ifndef SERIALGC
233 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
234 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
235 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
236 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
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
243 };
244
245 #undef CC
246
247 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
248 {
249 if (WhiteBoxAPI) {
250 // Make sure that wbclass is loaded by the null classloader
251 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
252 Handle loader(ikh->class_loader());
253 if (loader.is_null()) {
254 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
255 jint result = env->RegisterNatives(wbclass, methods, sizeof(methods)/sizeof(methods[0]));
256 if (result == 0) {
257 WhiteBox::set_used();
258 }
259 }
260 }
261 }
262 JVM_END
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