1 /*
2 * Copyright (c) 2012, 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
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 #include "utilities/macros.hpp"
40
41 #if INCLUDE_ALL_GCS
42 #include "gc_implementation/g1/concurrentMark.hpp"
43 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
44 #include "gc_implementation/g1/heapRegionRemSet.hpp"
45 #endif // INCLUDE_ALL_GCS
46
47 #ifdef INCLUDE_NMT
48 #include "services/memTracker.hpp"
49 #endif // INCLUDE_NMT
50
51 #include "compiler/compileBroker.hpp"
52
53 bool WhiteBox::_used = false;
54
55 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
56 return (jlong)(void*)JNIHandles::resolve(obj);
57 WB_END
58
59 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
60 return heapOopSize;
61 WB_END
62
63
64 class WBIsKlassAliveClosure : public KlassClosure {
65 Symbol* _name;
66 bool _found;
67 public:
68 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
69
70 void do_klass(Klass* k) {
71 if (_found) return;
72 Symbol* ksym = k->name();
73 if (ksym->fast_compare(_name) == 0) {
74 _found = true;
75 }
76 }
77
78 bool found() const {
79 return _found;
80 }
81 };
82
83 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
84 Handle h_name = JNIHandles::resolve(name);
85 if (h_name.is_null()) return false;
86 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
87 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
88
89 WBIsKlassAliveClosure closure(sym);
90 ClassLoaderDataGraph::classes_do(&closure);
91
92 return closure.found();
93 WB_END
94
95 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
96 CollectorPolicy * p = Universe::heap()->collector_policy();
97 gclog_or_tty->print_cr("Minimum heap "SIZE_FORMAT" Initial heap "
98 SIZE_FORMAT" Maximum heap "SIZE_FORMAT" Min alignment "SIZE_FORMAT" Max alignment "SIZE_FORMAT,
99 p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
100 p->min_alignment(), p->max_alignment());
101 }
102 WB_END
103
104 #if INCLUDE_ALL_GCS
105 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
106 G1CollectedHeap* g1 = G1CollectedHeap::heap();
107 oop result = JNIHandles::resolve(obj);
108 const HeapRegion* hr = g1->heap_region_containing(result);
109 return hr->isHumongous();
110 WB_END
111
112 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
113 G1CollectedHeap* g1 = G1CollectedHeap::heap();
114 size_t nr = g1->free_regions();
115 return (jlong)nr;
116 WB_END
117
118 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
119 G1CollectedHeap* g1 = G1CollectedHeap::heap();
120 ConcurrentMark* cm = g1->concurrent_mark();
121 return cm->concurrent_marking_in_progress();
122 WB_END
123
124 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
125 return (jint)HeapRegion::GrainBytes;
126 WB_END
127 #endif // INCLUDE_ALL_GCS
128
129 #ifdef INCLUDE_NMT
130 // Keep track of the 3 allocations in NMTAllocTest so we can free them later
131 // on and verify that they're not visible anymore
132 static void* nmtMtTest1 = NULL, *nmtMtTest2 = NULL, *nmtMtTest3 = NULL;
133
134 // Alloc memory using the test memory type so that we can use that to see if
135 // NMT picks it up correctly
136 WB_ENTRY(jboolean, WB_NMTAllocTest(JNIEnv* env))
137 void *mem;
138
139 if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) {
140 return false;
141 }
142
143 // Allocate 2 * 128k + 256k + 1024k and free the 1024k one to make sure we track
144 // everything correctly. Total should be 512k held alive.
145 nmtMtTest1 = os::malloc(128 * 1024, mtTest);
146 mem = os::malloc(1024 * 1024, mtTest);
147 nmtMtTest2 = os::malloc(256 * 1024, mtTest);
148 os::free(mem, mtTest);
149 nmtMtTest3 = os::malloc(128 * 1024, mtTest);
150
151 return true;
152 WB_END
153
154 // Free the memory allocated by NMTAllocTest
155 WB_ENTRY(jboolean, WB_NMTFreeTestMemory(JNIEnv* env))
156
157 if (nmtMtTest1 == NULL || nmtMtTest2 == NULL || nmtMtTest3 == NULL) {
158 return false;
159 }
160
161 os::free(nmtMtTest1, mtTest);
162 nmtMtTest1 = NULL;
163 os::free(nmtMtTest2, mtTest);
164 nmtMtTest2 = NULL;
165 os::free(nmtMtTest3, mtTest);
166 nmtMtTest3 = NULL;
167
168 return true;
169 WB_END
170
171 // Block until the current generation of NMT data to be merged, used to reliably test the NMT feature
172 WB_ENTRY(jboolean, WB_NMTWaitForDataMerge(JNIEnv* env))
173
174 if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) {
175 return false;
176 }
177
178 return MemTracker::wbtest_wait_for_data_merge();
179 WB_END
180
181 #endif // INCLUDE_NMT
182
183 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
184 assert(method != NULL, "method should not be null");
185 ThreadToNativeFromVM ttn(thread);
186 return env->FromReflectedMethod(method);
187 }
188
189 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
190 MutexLockerEx mu(Compile_lock);
191 CodeCache::mark_all_nmethods_for_deoptimization();
192 VM_Deoptimize op;
193 VMThread::execute(&op);
194 WB_END
195
196 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method))
197 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
198 MutexLockerEx mu(Compile_lock);
199 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
200 int result = 0;
201 nmethod* code = mh->code();
202 if (code != NULL) {
203 code->mark_for_deoptimization();
204 ++result;
205 }
206 result += CodeCache::mark_for_deoptimization(mh());
207 if (result > 0) {
208 VM_Deoptimize op;
209 VMThread::execute(&op);
210 }
211 return result;
212 WB_END
213
214 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method))
215 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
216 MutexLockerEx mu(Compile_lock);
217 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
218 nmethod* code = mh->code();
219 if (code == NULL) {
220 return JNI_FALSE;
221 }
222 return (code->is_alive() && !code->is_marked_for_deoptimization());
223 WB_END
224
225 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method))
226 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
227 MutexLockerEx mu(Compile_lock);
228 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
229 return !mh->is_not_compilable();
230 WB_END
231
232 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
233 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
234 MutexLockerEx mu(Compile_lock);
235 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
236 return mh->queued_for_compilation();
237 WB_END
238
239 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method))
240 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
241 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
242 nmethod* code = mh->code();
243 return (code != NULL ? code->comp_level() : CompLevel_none);
244 WB_END
245
246
247 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method))
248 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
249 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
250 mh->set_not_compilable();
251 WB_END
252
253 WB_ENTRY(jboolean, WB_SetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
254 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
255 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
256 bool result = mh->dont_inline();
257 mh->set_dont_inline(value == JNI_TRUE);
258 return result;
259 WB_END
260
261 WB_ENTRY(jint, WB_GetCompileQueuesSize(JNIEnv* env, jobject o))
262 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
263 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
264 WB_END
265
266 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
267 ResourceMark rm(THREAD);
268 int len;
269 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len);
270 oop found_string = StringTable::the_table()->lookup(name, len);
271 if (found_string == NULL) {
272 return false;
273 }
274 return true;
275 WB_END
276
277
278 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
279 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
280 Universe::heap()->collect(GCCause::_last_ditch_collection);
281 WB_END
282
283
284 //Some convenience methods to deal with objects from java
285 int WhiteBox::offset_for_field(const char* field_name, oop object,
286 Symbol* signature_symbol) {
287 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
288 Thread* THREAD = Thread::current();
289
290 //Get the class of our object
291 Klass* arg_klass = object->klass();
292 //Turn it into an instance-klass
293 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
294
295 //Create symbols to look for in the class
296 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
297 THREAD);
298
299 //To be filled in with an offset of the field we're looking for
300 fieldDescriptor fd;
301
302 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
303 if (res == NULL) {
304 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
305 name_symbol->as_C_string());
306 fatal("Invalid layout of preloaded class");
307 }
308
309 //fetch the field at the offset we've found
310 int dest_offset = fd.offset();
311
312 return dest_offset;
313 }
314
315
316 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
317 int offset = offset_for_field(field_name, object,
318 vmSymbols::string_signature());
319 oop string = object->obj_field(offset);
320 if (string == NULL) {
321 return NULL;
322 }
323 const char* ret = java_lang_String::as_utf8_string(string);
324 return ret;
325 }
326
327 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
328 int offset =
329 offset_for_field(field_name, object, vmSymbols::bool_signature());
330 bool ret = (object->bool_field(offset) == JNI_TRUE);
331 return ret;
332 }
333
334
335 #define CC (char*)
336
337 static JNINativeMethod methods[] = {
338 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
339 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
340 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
341 {CC"parseCommandLine",
342 CC"(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
343 (void*) &WB_ParseCommandLine
344 },
345 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
346 #if INCLUDE_ALL_GCS
347 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
348 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
349 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
350 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
351 #endif // INCLUDE_ALL_GCS
352 #ifdef INCLUDE_NMT
353 {CC"NMTAllocTest", CC"()Z", (void*)&WB_NMTAllocTest },
354 {CC"NMTFreeTestMemory", CC"()Z", (void*)&WB_NMTFreeTestMemory },
355 {CC"NMTWaitForDataMerge",CC"()Z", (void*)&WB_NMTWaitForDataMerge},
356 #endif // INCLUDE_NMT
357 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
358 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Method;)I",
359 (void*)&WB_DeoptimizeMethod },
360 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Method;)Z",
361 (void*)&WB_IsMethodCompiled },
362 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Method;)Z",
363 (void*)&WB_IsMethodCompilable},
364 {CC"isMethodQueuedForCompilation",
365 CC"(Ljava/lang/reflect/Method;)Z", (void*)&WB_IsMethodQueuedForCompilation},
366 {CC"makeMethodNotCompilable",
367 CC"(Ljava/lang/reflect/Method;)V", (void*)&WB_MakeMethodNotCompilable},
368 {CC"setDontInlineMethod",
369 CC"(Ljava/lang/reflect/Method;Z)Z", (void*)&WB_SetDontInlineMethod},
370 {CC"getMethodCompilationLevel",
371 CC"(Ljava/lang/reflect/Method;)I", (void*)&WB_GetMethodCompilationLevel},
372 {CC"getCompileQueuesSize",
373 CC"()I", (void*)&WB_GetCompileQueuesSize},
374 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
375 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
376 };
377
378 #undef CC
379
380 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
381 {
382 if (WhiteBoxAPI) {
383 // Make sure that wbclass is loaded by the null classloader
384 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
385 Handle loader(ikh->class_loader());
386 if (loader.is_null()) {
387 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
388 jint result = env->RegisterNatives(wbclass, methods, sizeof(methods)/sizeof(methods[0]));
389 if (result == 0) {
390 WhiteBox::set_used();
391 }
392 }
393 }
394 }
395 JVM_END