Mercurial > hg > graal-compiler
annotate src/share/vm/prims/whitebox.cpp @ 7106:4983da9d3fc7
Merge
author | Christian Wimmer <christian.wimmer@oracle.com> |
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date | Thu, 29 Nov 2012 17:43:48 -0800 |
parents | da91efe96a93 |
children | 4102b59539ce db9981fd3124 |
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 | |
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 | |
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56 |
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57 class WBIsKlassAliveClosure : public KlassClosure { |
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58 Symbol* _name; |
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59 bool _found; |
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60 public: |
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61 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {} |
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62 |
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63 void do_klass(Klass* k) { |
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64 if (_found) return; |
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65 Symbol* ksym = k->name(); |
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66 if (ksym->fast_compare(_name) == 0) { |
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67 _found = true; |
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68 } |
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69 } |
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70 |
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71 bool found() const { |
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72 return _found; |
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73 } |
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74 }; |
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75 |
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76 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name)) |
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77 Handle h_name = JNIHandles::resolve(name); |
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78 if (h_name.is_null()) return false; |
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79 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false); |
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80 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return |
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81 |
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82 WBIsKlassAliveClosure closure(sym); |
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83 ClassLoaderDataGraph::classes_do(&closure); |
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84 |
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85 return closure.found(); |
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86 WB_END |
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87 |
5915 | 88 #ifndef SERIALGC |
89 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj)) | |
90 G1CollectedHeap* g1 = G1CollectedHeap::heap(); | |
91 oop result = JNIHandles::resolve(obj); | |
92 const HeapRegion* hr = g1->heap_region_containing(result); | |
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 | |
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113 //Some convenience methods to deal with objects from java |
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114 int WhiteBox::offset_for_field(const char* field_name, oop object, |
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115 Symbol* signature_symbol) { |
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116 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid"); |
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117 Thread* THREAD = Thread::current(); |
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118 |
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119 //Get the class of our object |
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120 Klass* arg_klass = object->klass(); |
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121 //Turn it into an instance-klass |
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122 InstanceKlass* ik = InstanceKlass::cast(arg_klass); |
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123 |
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124 //Create symbols to look for in the class |
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125 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name), |
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126 THREAD); |
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127 |
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128 //To be filled in with an offset of the field we're looking for |
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129 fieldDescriptor fd; |
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130 |
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131 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd); |
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132 if (res == NULL) { |
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133 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), |
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134 name_symbol->as_C_string()); |
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135 fatal("Invalid layout of preloaded class"); |
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136 } |
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137 |
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138 //fetch the field at the offset we've found |
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139 int dest_offset = fd.offset(); |
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140 |
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141 return dest_offset; |
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142 } |
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143 |
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144 |
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145 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) { |
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146 int offset = offset_for_field(field_name, object, |
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147 vmSymbols::string_signature()); |
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148 oop string = object->obj_field(offset); |
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149 if (string == NULL) { |
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150 return NULL; |
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151 } |
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152 const char* ret = java_lang_String::as_utf8_string(string); |
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153 return ret; |
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154 } |
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155 |
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156 bool WhiteBox::lookup_bool(const char* field_name, oop object) { |
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157 int offset = |
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158 offset_for_field(field_name, object, vmSymbols::bool_signature()); |
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159 bool ret = (object->bool_field(offset) == JNI_TRUE); |
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160 return ret; |
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161 } |
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162 |
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163 |
5915 | 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 }, | |
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169 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive }, |
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170 {CC "parseCommandLine", |
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171 CC "(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;", |
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172 (void*) &WB_ParseCommandLine |
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173 }, |
5915 | 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 |