Mercurial > hg > truffle
annotate src/share/vm/prims/whitebox.cpp @ 8021:8d9fc28831cc
7182152: Instrumentation hot swap test incorrect monitor count
Summary: Add/refine new tracing support using -XX:TraceRedefineClasses=16384.
Reviewed-by: coleenp, acorn, sspitsyn
author | dcubed |
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date | Wed, 06 Feb 2013 14:31:37 -0800 |
parents | 4102b59539ce |
children | 3c9bc17b9403 |
rev | line source |
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5915 | 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" | |
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29 |
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30 #include "classfile/symbolTable.hpp" |
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31 #include "classfile/classLoaderData.hpp" |
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32 |
5915 | 33 #include "prims/whitebox.hpp" |
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34 #include "prims/wbtestmethods/parserTests.hpp" |
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35 |
5915 | 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 | |
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46 #ifdef INCLUDE_NMT |
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47 #include "services/memTracker.hpp" |
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48 #endif // INCLUDE_NMT |
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49 |
5915 | 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 | |
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60 |
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61 class WBIsKlassAliveClosure : public KlassClosure { |
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62 Symbol* _name; |
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63 bool _found; |
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64 public: |
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65 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {} |
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66 |
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67 void do_klass(Klass* k) { |
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68 if (_found) return; |
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69 Symbol* ksym = k->name(); |
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70 if (ksym->fast_compare(_name) == 0) { |
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71 _found = true; |
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72 } |
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73 } |
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74 |
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75 bool found() const { |
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76 return _found; |
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77 } |
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78 }; |
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79 |
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80 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name)) |
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81 Handle h_name = JNIHandles::resolve(name); |
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82 if (h_name.is_null()) return false; |
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83 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false); |
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84 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return |
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85 |
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86 WBIsKlassAliveClosure closure(sym); |
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87 ClassLoaderDataGraph::classes_do(&closure); |
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88 |
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89 return closure.found(); |
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90 WB_END |
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91 |
5915 | 92 #ifndef SERIALGC |
93 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj)) | |
94 G1CollectedHeap* g1 = G1CollectedHeap::heap(); | |
95 oop result = JNIHandles::resolve(obj); | |
96 const HeapRegion* hr = g1->heap_region_containing(result); | |
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 | |
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117 #ifdef INCLUDE_NMT |
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118 // Keep track of the 3 allocations in NMTAllocTest so we can free them later |
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119 // on and verify that they're not visible anymore |
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120 static void* nmtMtTest1 = NULL, *nmtMtTest2 = NULL, *nmtMtTest3 = NULL; |
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121 |
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122 // Alloc memory using the test memory type so that we can use that to see if |
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123 // NMT picks it up correctly |
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124 WB_ENTRY(jboolean, WB_NMTAllocTest(JNIEnv* env)) |
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125 void *mem; |
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126 |
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127 if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) { |
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128 return false; |
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129 } |
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130 |
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131 // Allocate 2 * 128k + 256k + 1024k and free the 1024k one to make sure we track |
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132 // everything correctly. Total should be 512k held alive. |
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133 nmtMtTest1 = os::malloc(128 * 1024, mtTest); |
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134 mem = os::malloc(1024 * 1024, mtTest); |
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135 nmtMtTest2 = os::malloc(256 * 1024, mtTest); |
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136 os::free(mem, mtTest); |
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137 nmtMtTest3 = os::malloc(128 * 1024, mtTest); |
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138 |
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139 return true; |
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140 WB_END |
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141 |
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142 // Free the memory allocated by NMTAllocTest |
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143 WB_ENTRY(jboolean, WB_NMTFreeTestMemory(JNIEnv* env)) |
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144 |
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145 if (nmtMtTest1 == NULL || nmtMtTest2 == NULL || nmtMtTest3 == NULL) { |
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146 return false; |
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147 } |
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148 |
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149 os::free(nmtMtTest1, mtTest); |
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150 nmtMtTest1 = NULL; |
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151 os::free(nmtMtTest2, mtTest); |
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152 nmtMtTest2 = NULL; |
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153 os::free(nmtMtTest3, mtTest); |
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154 nmtMtTest3 = NULL; |
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155 |
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156 return true; |
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157 WB_END |
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158 |
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159 // Block until the current generation of NMT data to be merged, used to reliably test the NMT feature |
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160 WB_ENTRY(jboolean, WB_NMTWaitForDataMerge(JNIEnv* env)) |
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161 |
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162 if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) { |
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163 return false; |
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164 } |
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165 |
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166 return MemTracker::wbtest_wait_for_data_merge(); |
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167 WB_END |
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168 |
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169 #endif // INCLUDE_NMT |
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170 |
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171 //Some convenience methods to deal with objects from java |
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172 int WhiteBox::offset_for_field(const char* field_name, oop object, |
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173 Symbol* signature_symbol) { |
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174 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid"); |
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175 Thread* THREAD = Thread::current(); |
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176 |
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177 //Get the class of our object |
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178 Klass* arg_klass = object->klass(); |
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179 //Turn it into an instance-klass |
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180 InstanceKlass* ik = InstanceKlass::cast(arg_klass); |
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181 |
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182 //Create symbols to look for in the class |
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183 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name), |
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184 THREAD); |
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185 |
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186 //To be filled in with an offset of the field we're looking for |
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187 fieldDescriptor fd; |
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188 |
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189 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd); |
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190 if (res == NULL) { |
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191 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), |
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192 name_symbol->as_C_string()); |
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193 fatal("Invalid layout of preloaded class"); |
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194 } |
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195 |
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196 //fetch the field at the offset we've found |
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197 int dest_offset = fd.offset(); |
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198 |
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199 return dest_offset; |
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200 } |
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201 |
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202 |
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203 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) { |
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204 int offset = offset_for_field(field_name, object, |
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205 vmSymbols::string_signature()); |
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206 oop string = object->obj_field(offset); |
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207 if (string == NULL) { |
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208 return NULL; |
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209 } |
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210 const char* ret = java_lang_String::as_utf8_string(string); |
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211 return ret; |
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212 } |
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213 |
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214 bool WhiteBox::lookup_bool(const char* field_name, oop object) { |
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215 int offset = |
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216 offset_for_field(field_name, object, vmSymbols::bool_signature()); |
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217 bool ret = (object->bool_field(offset) == JNI_TRUE); |
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218 return ret; |
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219 } |
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220 |
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221 |
5915 | 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 }, | |
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227 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive }, |
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228 {CC "parseCommandLine", |
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229 CC "(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;", |
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230 (void*) &WB_ParseCommandLine |
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231 }, |
5915 | 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 | |
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238 #ifdef INCLUDE_NMT |
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239 {CC"NMTAllocTest", CC"()Z", (void*)&WB_NMTAllocTest }, |
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240 {CC"NMTFreeTestMemory", CC"()Z", (void*)&WB_NMTFreeTestMemory }, |
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241 {CC"NMTWaitForDataMerge",CC"()Z", (void*)&WB_NMTWaitForDataMerge}, |
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242 #endif // INCLUDE_NMT |
5915 | 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 |