Mercurial > hg > truffle
annotate src/share/vm/prims/whitebox.cpp @ 8390:acc24060b64f
Use implicit null checks for all null checks
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Mon, 18 Mar 2013 14:45:36 +0100 |
parents | 12e01444ca2d |
children | ede380e13960 |
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 |
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51 #include "compiler/compileBroker.hpp" |
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52 |
5915 | 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 | |
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63 |
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64 class WBIsKlassAliveClosure : public KlassClosure { |
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65 Symbol* _name; |
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66 bool _found; |
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67 public: |
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68 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {} |
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69 |
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70 void do_klass(Klass* k) { |
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71 if (_found) return; |
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72 Symbol* ksym = k->name(); |
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73 if (ksym->fast_compare(_name) == 0) { |
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74 _found = true; |
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75 } |
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76 } |
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77 |
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78 bool found() const { |
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79 return _found; |
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80 } |
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81 }; |
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82 |
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83 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name)) |
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84 Handle h_name = JNIHandles::resolve(name); |
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85 if (h_name.is_null()) return false; |
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86 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false); |
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87 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return |
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88 |
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89 WBIsKlassAliveClosure closure(sym); |
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90 ClassLoaderDataGraph::classes_do(&closure); |
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91 |
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92 return closure.found(); |
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93 WB_END |
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94 |
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95 #if INCLUDE_ALL_GCS |
5915 | 96 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj)) |
97 G1CollectedHeap* g1 = G1CollectedHeap::heap(); | |
98 oop result = JNIHandles::resolve(obj); | |
99 const HeapRegion* hr = g1->heap_region_containing(result); | |
100 return hr->isHumongous(); | |
101 WB_END | |
102 | |
103 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o)) | |
104 G1CollectedHeap* g1 = G1CollectedHeap::heap(); | |
105 size_t nr = g1->free_regions(); | |
106 return (jlong)nr; | |
107 WB_END | |
108 | |
109 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o)) | |
110 G1CollectedHeap* g1 = G1CollectedHeap::heap(); | |
111 ConcurrentMark* cm = g1->concurrent_mark(); | |
112 return cm->concurrent_marking_in_progress(); | |
113 WB_END | |
114 | |
115 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o)) | |
116 return (jint)HeapRegion::GrainBytes; | |
117 WB_END | |
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118 #endif // INCLUDE_ALL_GCS |
5915 | 119 |
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120 #ifdef INCLUDE_NMT |
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121 // Keep track of the 3 allocations in NMTAllocTest so we can free them later |
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122 // on and verify that they're not visible anymore |
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123 static void* nmtMtTest1 = NULL, *nmtMtTest2 = NULL, *nmtMtTest3 = NULL; |
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124 |
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125 // Alloc memory using the test memory type so that we can use that to see if |
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126 // NMT picks it up correctly |
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127 WB_ENTRY(jboolean, WB_NMTAllocTest(JNIEnv* env)) |
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128 void *mem; |
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129 |
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130 if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) { |
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131 return false; |
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132 } |
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133 |
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134 // Allocate 2 * 128k + 256k + 1024k and free the 1024k one to make sure we track |
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135 // everything correctly. Total should be 512k held alive. |
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136 nmtMtTest1 = os::malloc(128 * 1024, mtTest); |
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137 mem = os::malloc(1024 * 1024, mtTest); |
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138 nmtMtTest2 = os::malloc(256 * 1024, mtTest); |
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139 os::free(mem, mtTest); |
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140 nmtMtTest3 = os::malloc(128 * 1024, mtTest); |
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141 |
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142 return true; |
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143 WB_END |
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144 |
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145 // Free the memory allocated by NMTAllocTest |
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146 WB_ENTRY(jboolean, WB_NMTFreeTestMemory(JNIEnv* env)) |
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147 |
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148 if (nmtMtTest1 == NULL || nmtMtTest2 == NULL || nmtMtTest3 == NULL) { |
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149 return false; |
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150 } |
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151 |
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152 os::free(nmtMtTest1, mtTest); |
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153 nmtMtTest1 = NULL; |
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154 os::free(nmtMtTest2, mtTest); |
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155 nmtMtTest2 = NULL; |
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156 os::free(nmtMtTest3, mtTest); |
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157 nmtMtTest3 = NULL; |
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158 |
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159 return true; |
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160 WB_END |
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161 |
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162 // Block until the current generation of NMT data to be merged, used to reliably test the NMT feature |
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163 WB_ENTRY(jboolean, WB_NMTWaitForDataMerge(JNIEnv* env)) |
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164 |
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165 if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) { |
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166 return false; |
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167 } |
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168 |
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169 return MemTracker::wbtest_wait_for_data_merge(); |
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170 WB_END |
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171 |
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172 #endif // INCLUDE_NMT |
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173 |
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174 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) { |
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175 assert(method != NULL, "method should not be null"); |
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176 ThreadToNativeFromVM ttn(thread); |
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177 return env->FromReflectedMethod(method); |
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178 } |
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179 |
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180 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o)) |
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181 MutexLockerEx mu(Compile_lock); |
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182 CodeCache::mark_all_nmethods_for_deoptimization(); |
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183 VM_Deoptimize op; |
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184 VMThread::execute(&op); |
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185 WB_END |
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186 |
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187 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method)) |
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188 jmethodID jmid = reflected_method_to_jmid(thread, env, method); |
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189 MutexLockerEx mu(Compile_lock); |
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190 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); |
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191 int result = 0; |
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192 nmethod* code = mh->code(); |
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193 if (code != NULL) { |
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194 code->mark_for_deoptimization(); |
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195 ++result; |
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196 } |
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197 result += CodeCache::mark_for_deoptimization(mh()); |
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198 if (result > 0) { |
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199 VM_Deoptimize op; |
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200 VMThread::execute(&op); |
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201 } |
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202 return result; |
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203 WB_END |
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204 |
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205 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method)) |
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206 jmethodID jmid = reflected_method_to_jmid(thread, env, method); |
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207 MutexLockerEx mu(Compile_lock); |
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208 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); |
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209 nmethod* code = mh->code(); |
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210 if (code == NULL) { |
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211 return JNI_FALSE; |
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212 } |
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213 return (code->is_alive() && !code->is_marked_for_deoptimization()); |
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214 WB_END |
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215 |
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216 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method)) |
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217 jmethodID jmid = reflected_method_to_jmid(thread, env, method); |
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218 MutexLockerEx mu(Compile_lock); |
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219 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); |
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220 return !mh->is_not_compilable(); |
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221 WB_END |
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222 |
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223 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method)) |
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224 jmethodID jmid = reflected_method_to_jmid(thread, env, method); |
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225 MutexLockerEx mu(Compile_lock); |
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226 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); |
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227 return mh->queued_for_compilation(); |
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228 WB_END |
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229 |
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230 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method)) |
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231 jmethodID jmid = reflected_method_to_jmid(thread, env, method); |
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232 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); |
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233 nmethod* code = mh->code(); |
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234 return (code != NULL ? code->comp_level() : CompLevel_none); |
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235 WB_END |
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236 |
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237 |
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238 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method)) |
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239 jmethodID jmid = reflected_method_to_jmid(thread, env, method); |
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240 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); |
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241 mh->set_not_compilable(); |
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242 WB_END |
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243 |
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244 WB_ENTRY(jboolean, WB_SetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value)) |
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245 jmethodID jmid = reflected_method_to_jmid(thread, env, method); |
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246 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); |
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247 bool result = mh->dont_inline(); |
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248 mh->set_dont_inline(value == JNI_TRUE); |
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249 return result; |
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250 WB_END |
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251 |
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252 WB_ENTRY(jint, WB_GetCompileQueuesSize(JNIEnv* env, jobject o)) |
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253 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ + |
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254 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */; |
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255 WB_END |
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256 |
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257 //Some convenience methods to deal with objects from java |
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258 int WhiteBox::offset_for_field(const char* field_name, oop object, |
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259 Symbol* signature_symbol) { |
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260 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid"); |
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261 Thread* THREAD = Thread::current(); |
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262 |
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263 //Get the class of our object |
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264 Klass* arg_klass = object->klass(); |
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265 //Turn it into an instance-klass |
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266 InstanceKlass* ik = InstanceKlass::cast(arg_klass); |
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267 |
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268 //Create symbols to look for in the class |
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269 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name), |
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270 THREAD); |
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271 |
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272 //To be filled in with an offset of the field we're looking for |
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273 fieldDescriptor fd; |
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274 |
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275 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd); |
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276 if (res == NULL) { |
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277 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), |
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278 name_symbol->as_C_string()); |
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279 fatal("Invalid layout of preloaded class"); |
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280 } |
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281 |
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282 //fetch the field at the offset we've found |
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283 int dest_offset = fd.offset(); |
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284 |
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285 return dest_offset; |
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286 } |
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287 |
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288 |
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289 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) { |
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290 int offset = offset_for_field(field_name, object, |
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291 vmSymbols::string_signature()); |
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292 oop string = object->obj_field(offset); |
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293 if (string == NULL) { |
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294 return NULL; |
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295 } |
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296 const char* ret = java_lang_String::as_utf8_string(string); |
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297 return ret; |
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298 } |
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299 |
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300 bool WhiteBox::lookup_bool(const char* field_name, oop object) { |
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301 int offset = |
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302 offset_for_field(field_name, object, vmSymbols::bool_signature()); |
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303 bool ret = (object->bool_field(offset) == JNI_TRUE); |
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304 return ret; |
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305 } |
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306 |
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307 |
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309 | |
310 static JNINativeMethod methods[] = { | |
311 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress }, | |
312 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize }, | |
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313 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive }, |
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314 {CC"parseCommandLine", |
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315 CC"(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;", |
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316 (void*) &WB_ParseCommandLine |
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317 }, |
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318 #if INCLUDE_ALL_GCS |
5915 | 319 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark}, |
320 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous }, | |
321 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions }, | |
322 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize }, | |
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323 #endif // INCLUDE_ALL_GCS |
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324 #ifdef INCLUDE_NMT |
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325 {CC"NMTAllocTest", CC"()Z", (void*)&WB_NMTAllocTest }, |
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326 {CC"NMTFreeTestMemory", CC"()Z", (void*)&WB_NMTFreeTestMemory }, |
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327 {CC"NMTWaitForDataMerge",CC"()Z", (void*)&WB_NMTWaitForDataMerge}, |
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328 #endif // INCLUDE_NMT |
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329 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll }, |
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330 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Method;)I", |
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331 (void*)&WB_DeoptimizeMethod }, |
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332 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Method;)Z", |
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333 (void*)&WB_IsMethodCompiled }, |
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334 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Method;)Z", |
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335 (void*)&WB_IsMethodCompilable}, |
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336 {CC"isMethodQueuedForCompilation", |
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337 CC"(Ljava/lang/reflect/Method;)Z", (void*)&WB_IsMethodQueuedForCompilation}, |
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338 {CC"makeMethodNotCompilable", |
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339 CC"(Ljava/lang/reflect/Method;)V", (void*)&WB_MakeMethodNotCompilable}, |
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340 {CC"setDontInlineMethod", |
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341 CC"(Ljava/lang/reflect/Method;Z)Z", (void*)&WB_SetDontInlineMethod}, |
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342 {CC"getMethodCompilationLevel", |
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343 CC"(Ljava/lang/reflect/Method;)I", (void*)&WB_GetMethodCompilationLevel}, |
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344 {CC"getCompileQueuesSize", |
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345 CC"()I", (void*)&WB_GetCompileQueuesSize}, |
5915 | 346 }; |
347 | |
348 #undef CC | |
349 | |
350 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass)) | |
351 { | |
352 if (WhiteBoxAPI) { | |
353 // Make sure that wbclass is loaded by the null classloader | |
354 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass()); | |
355 Handle loader(ikh->class_loader()); | |
356 if (loader.is_null()) { | |
357 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI | |
358 jint result = env->RegisterNatives(wbclass, methods, sizeof(methods)/sizeof(methods[0])); | |
359 if (result == 0) { | |
360 WhiteBox::set_used(); | |
361 } | |
362 } | |
363 } | |
364 } | |
365 JVM_END |