Mercurial > hg > truffle
annotate src/share/vm/prims/whitebox.cpp @ 8044:2c673161698a
8007402: Code cleanup to remove Parfait false positive
Summary: add array access range check
Reviewed-by: kvn
author | drchase |
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date | Sat, 09 Feb 2013 12:55:09 -0800 |
parents | 3c9bc17b9403 |
children | 12e01444ca2d |
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" | |
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39 #include "utilities/macros.hpp" |
5915 | 40 |
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41 #if INCLUDE_ALL_GCS |
5915 | 42 #include "gc_implementation/g1/concurrentMark.hpp" |
43 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" | |
44 #include "gc_implementation/g1/heapRegionRemSet.hpp" | |
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45 #endif // INCLUDE_ALL_GCS |
5915 | 46 |
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47 #ifdef INCLUDE_NMT |
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48 #include "services/memTracker.hpp" |
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49 #endif // INCLUDE_NMT |
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50 |
5915 | 51 bool WhiteBox::_used = false; |
52 | |
53 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj)) | |
54 return (jlong)(void*)JNIHandles::resolve(obj); | |
55 WB_END | |
56 | |
57 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o)) | |
58 return heapOopSize; | |
59 WB_END | |
60 | |
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61 |
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62 class WBIsKlassAliveClosure : public KlassClosure { |
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63 Symbol* _name; |
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64 bool _found; |
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65 public: |
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66 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {} |
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67 |
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68 void do_klass(Klass* k) { |
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69 if (_found) return; |
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70 Symbol* ksym = k->name(); |
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71 if (ksym->fast_compare(_name) == 0) { |
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72 _found = true; |
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73 } |
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74 } |
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75 |
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76 bool found() const { |
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77 return _found; |
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78 } |
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79 }; |
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80 |
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81 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name)) |
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82 Handle h_name = JNIHandles::resolve(name); |
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83 if (h_name.is_null()) return false; |
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84 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false); |
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85 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return |
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86 |
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87 WBIsKlassAliveClosure closure(sym); |
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88 ClassLoaderDataGraph::classes_do(&closure); |
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89 |
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90 return closure.found(); |
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91 WB_END |
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92 |
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93 #if INCLUDE_ALL_GCS |
5915 | 94 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj)) |
95 G1CollectedHeap* g1 = G1CollectedHeap::heap(); | |
96 oop result = JNIHandles::resolve(obj); | |
97 const HeapRegion* hr = g1->heap_region_containing(result); | |
98 return hr->isHumongous(); | |
99 WB_END | |
100 | |
101 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o)) | |
102 G1CollectedHeap* g1 = G1CollectedHeap::heap(); | |
103 size_t nr = g1->free_regions(); | |
104 return (jlong)nr; | |
105 WB_END | |
106 | |
107 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o)) | |
108 G1CollectedHeap* g1 = G1CollectedHeap::heap(); | |
109 ConcurrentMark* cm = g1->concurrent_mark(); | |
110 return cm->concurrent_marking_in_progress(); | |
111 WB_END | |
112 | |
113 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o)) | |
114 return (jint)HeapRegion::GrainBytes; | |
115 WB_END | |
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116 #endif // INCLUDE_ALL_GCS |
5915 | 117 |
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118 #ifdef INCLUDE_NMT |
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119 // Keep track of the 3 allocations in NMTAllocTest so we can free them later |
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120 // on and verify that they're not visible anymore |
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121 static void* nmtMtTest1 = NULL, *nmtMtTest2 = NULL, *nmtMtTest3 = NULL; |
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122 |
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123 // Alloc memory using the test memory type so that we can use that to see if |
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124 // NMT picks it up correctly |
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125 WB_ENTRY(jboolean, WB_NMTAllocTest(JNIEnv* env)) |
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126 void *mem; |
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127 |
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128 if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) { |
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129 return false; |
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130 } |
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131 |
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132 // Allocate 2 * 128k + 256k + 1024k and free the 1024k one to make sure we track |
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133 // everything correctly. Total should be 512k held alive. |
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134 nmtMtTest1 = os::malloc(128 * 1024, mtTest); |
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135 mem = os::malloc(1024 * 1024, mtTest); |
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136 nmtMtTest2 = os::malloc(256 * 1024, mtTest); |
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137 os::free(mem, mtTest); |
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138 nmtMtTest3 = os::malloc(128 * 1024, mtTest); |
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139 |
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140 return true; |
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141 WB_END |
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142 |
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143 // Free the memory allocated by NMTAllocTest |
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144 WB_ENTRY(jboolean, WB_NMTFreeTestMemory(JNIEnv* env)) |
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145 |
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146 if (nmtMtTest1 == NULL || nmtMtTest2 == NULL || nmtMtTest3 == NULL) { |
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147 return false; |
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148 } |
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149 |
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150 os::free(nmtMtTest1, mtTest); |
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151 nmtMtTest1 = NULL; |
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152 os::free(nmtMtTest2, mtTest); |
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153 nmtMtTest2 = NULL; |
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154 os::free(nmtMtTest3, mtTest); |
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155 nmtMtTest3 = NULL; |
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156 |
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157 return true; |
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158 WB_END |
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159 |
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160 // Block until the current generation of NMT data to be merged, used to reliably test the NMT feature |
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161 WB_ENTRY(jboolean, WB_NMTWaitForDataMerge(JNIEnv* env)) |
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162 |
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163 if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) { |
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164 return false; |
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165 } |
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166 |
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167 return MemTracker::wbtest_wait_for_data_merge(); |
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168 WB_END |
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169 |
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170 #endif // INCLUDE_NMT |
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171 |
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172 //Some convenience methods to deal with objects from java |
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173 int WhiteBox::offset_for_field(const char* field_name, oop object, |
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174 Symbol* signature_symbol) { |
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175 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid"); |
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176 Thread* THREAD = Thread::current(); |
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177 |
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178 //Get the class of our object |
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179 Klass* arg_klass = object->klass(); |
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180 //Turn it into an instance-klass |
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181 InstanceKlass* ik = InstanceKlass::cast(arg_klass); |
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182 |
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183 //Create symbols to look for in the class |
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184 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name), |
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185 THREAD); |
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186 |
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187 //To be filled in with an offset of the field we're looking for |
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188 fieldDescriptor fd; |
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189 |
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190 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd); |
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191 if (res == NULL) { |
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192 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), |
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193 name_symbol->as_C_string()); |
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194 fatal("Invalid layout of preloaded class"); |
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195 } |
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196 |
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197 //fetch the field at the offset we've found |
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198 int dest_offset = fd.offset(); |
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199 |
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200 return dest_offset; |
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201 } |
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202 |
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203 |
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204 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) { |
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205 int offset = offset_for_field(field_name, object, |
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206 vmSymbols::string_signature()); |
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207 oop string = object->obj_field(offset); |
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208 if (string == NULL) { |
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209 return NULL; |
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210 } |
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211 const char* ret = java_lang_String::as_utf8_string(string); |
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212 return ret; |
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213 } |
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214 |
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215 bool WhiteBox::lookup_bool(const char* field_name, oop object) { |
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216 int offset = |
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217 offset_for_field(field_name, object, vmSymbols::bool_signature()); |
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218 bool ret = (object->bool_field(offset) == JNI_TRUE); |
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219 return ret; |
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220 } |
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221 |
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222 |
5915 | 223 #define CC (char*) |
224 | |
225 static JNINativeMethod methods[] = { | |
226 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress }, | |
227 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize }, | |
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228 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive }, |
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229 {CC "parseCommandLine", |
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230 CC "(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;", |
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231 (void*) &WB_ParseCommandLine |
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232 }, |
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233 #if INCLUDE_ALL_GCS |
5915 | 234 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark}, |
235 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous }, | |
236 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions }, | |
237 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize }, | |
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238 #endif // INCLUDE_ALL_GCS |
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239 #ifdef INCLUDE_NMT |
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240 {CC"NMTAllocTest", CC"()Z", (void*)&WB_NMTAllocTest }, |
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241 {CC"NMTFreeTestMemory", CC"()Z", (void*)&WB_NMTFreeTestMemory }, |
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242 {CC"NMTWaitForDataMerge",CC"()Z", (void*)&WB_NMTWaitForDataMerge}, |
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243 #endif // INCLUDE_NMT |
5915 | 244 }; |
245 | |
246 #undef CC | |
247 | |
248 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass)) | |
249 { | |
250 if (WhiteBoxAPI) { | |
251 // Make sure that wbclass is loaded by the null classloader | |
252 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass()); | |
253 Handle loader(ikh->class_loader()); | |
254 if (loader.is_null()) { | |
255 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI | |
256 jint result = env->RegisterNatives(wbclass, methods, sizeof(methods)/sizeof(methods[0])); | |
257 if (result == 0) { | |
258 WhiteBox::set_used(); | |
259 } | |
260 } | |
261 } | |
262 } | |
263 JVM_END |