Thu, 24 Jan 2013 22:13:32 -0800
8005128: JSR 292: the mlvm redefineClassInBootstrap test crashes in ConstantPool::compare_entry_to
Summary: When constant pool is copied in merge_constant_pools the invokedynamic operands must be copied before.
Reviewed-by: coleenp, twisti
Contributed-by: serguei.spitsyn@oracle.com
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.
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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).
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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.
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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23 */
25 #include "precompiled.hpp"
27 #include "memory/universe.hpp"
28 #include "oops/oop.inline.hpp"
30 #include "classfile/symbolTable.hpp"
31 #include "classfile/classLoaderData.hpp"
33 #include "prims/whitebox.hpp"
34 #include "prims/wbtestmethods/parserTests.hpp"
36 #include "runtime/interfaceSupport.hpp"
37 #include "runtime/os.hpp"
38 #include "utilities/debug.hpp"
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
46 bool WhiteBox::_used = false;
48 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
49 return (jlong)(void*)JNIHandles::resolve(obj);
50 WB_END
52 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
53 return heapOopSize;
54 WB_END
57 class WBIsKlassAliveClosure : public KlassClosure {
58 Symbol* _name;
59 bool _found;
60 public:
61 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
63 void do_klass(Klass* k) {
64 if (_found) return;
65 Symbol* ksym = k->name();
66 if (ksym->fast_compare(_name) == 0) {
67 _found = true;
68 }
69 }
71 bool found() const {
72 return _found;
73 }
74 };
76 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
77 Handle h_name = JNIHandles::resolve(name);
78 if (h_name.is_null()) return false;
79 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
80 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
82 WBIsKlassAliveClosure closure(sym);
83 ClassLoaderDataGraph::classes_do(&closure);
85 return closure.found();
86 WB_END
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
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
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
108 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
109 return (jint)HeapRegion::GrainBytes;
110 WB_END
111 #endif // !SERIALGC
113 //Some convenience methods to deal with objects from java
114 int WhiteBox::offset_for_field(const char* field_name, oop object,
115 Symbol* signature_symbol) {
116 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
117 Thread* THREAD = Thread::current();
119 //Get the class of our object
120 Klass* arg_klass = object->klass();
121 //Turn it into an instance-klass
122 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
124 //Create symbols to look for in the class
125 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
126 THREAD);
128 //To be filled in with an offset of the field we're looking for
129 fieldDescriptor fd;
131 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
132 if (res == NULL) {
133 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
134 name_symbol->as_C_string());
135 fatal("Invalid layout of preloaded class");
136 }
138 //fetch the field at the offset we've found
139 int dest_offset = fd.offset();
141 return dest_offset;
142 }
145 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
146 int offset = offset_for_field(field_name, object,
147 vmSymbols::string_signature());
148 oop string = object->obj_field(offset);
149 if (string == NULL) {
150 return NULL;
151 }
152 const char* ret = java_lang_String::as_utf8_string(string);
153 return ret;
154 }
156 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
157 int offset =
158 offset_for_field(field_name, object, vmSymbols::bool_signature());
159 bool ret = (object->bool_field(offset) == JNI_TRUE);
160 return ret;
161 }
164 #define CC (char*)
166 static JNINativeMethod methods[] = {
167 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
168 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
169 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
170 {CC "parseCommandLine",
171 CC "(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
172 (void*) &WB_ParseCommandLine
173 },
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 };
182 #undef CC
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