Mercurial > hg > truffle
annotate src/share/vm/prims/whitebox.cpp @ 6203:04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
Reviewed-by: sspitsyn, dholmes, coleenp, kamg
author | fparain |
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date | Mon, 09 Jul 2012 01:28:37 -0700 |
parents | 5a1f452f8f90 |
children | da91efe96a93 |
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 |
5915 | 32 #include "prims/whitebox.hpp" |
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33 #include "prims/wbtestmethods/parserTests.hpp" |
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34 |
5915 | 35 #include "runtime/interfaceSupport.hpp" |
36 #include "runtime/os.hpp" | |
37 #include "utilities/debug.hpp" | |
38 | |
39 #ifndef SERIALGC | |
40 #include "gc_implementation/g1/concurrentMark.hpp" | |
41 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" | |
42 #include "gc_implementation/g1/heapRegionRemSet.hpp" | |
43 #endif // !SERIALGC | |
44 | |
45 bool WhiteBox::_used = false; | |
46 | |
47 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj)) | |
48 return (jlong)(void*)JNIHandles::resolve(obj); | |
49 WB_END | |
50 | |
51 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o)) | |
52 return heapOopSize; | |
53 WB_END | |
54 | |
55 #ifndef SERIALGC | |
56 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj)) | |
57 G1CollectedHeap* g1 = G1CollectedHeap::heap(); | |
58 oop result = JNIHandles::resolve(obj); | |
59 const HeapRegion* hr = g1->heap_region_containing(result); | |
60 return hr->isHumongous(); | |
61 WB_END | |
62 | |
63 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o)) | |
64 G1CollectedHeap* g1 = G1CollectedHeap::heap(); | |
65 size_t nr = g1->free_regions(); | |
66 return (jlong)nr; | |
67 WB_END | |
68 | |
69 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o)) | |
70 G1CollectedHeap* g1 = G1CollectedHeap::heap(); | |
71 ConcurrentMark* cm = g1->concurrent_mark(); | |
72 return cm->concurrent_marking_in_progress(); | |
73 WB_END | |
74 | |
75 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o)) | |
76 return (jint)HeapRegion::GrainBytes; | |
77 WB_END | |
78 #endif // !SERIALGC | |
79 | |
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80 //Some convenience methods to deal with objects from java |
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81 int WhiteBox::offset_for_field(const char* field_name, oop object, |
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82 Symbol* signature_symbol) { |
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83 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid"); |
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84 Thread* THREAD = Thread::current(); |
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85 |
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86 //Get the class of our object |
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87 klassOop arg_klass = object->klass(); |
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88 //Turn it into an instance-klass |
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89 instanceKlass* ik = instanceKlass::cast(arg_klass); |
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90 |
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91 //Create symbols to look for in the class |
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92 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name), |
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93 THREAD); |
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94 |
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95 //To be filled in with an offset of the field we're looking for |
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96 fieldDescriptor fd; |
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97 |
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98 klassOop res = ik->find_field(name_symbol, signature_symbol, &fd); |
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99 if (res == NULL) { |
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100 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), |
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101 name_symbol->as_C_string()); |
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102 fatal("Invalid layout of preloaded class"); |
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103 } |
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104 |
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105 //fetch the field at the offset we've found |
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106 int dest_offset = fd.offset(); |
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107 |
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108 return dest_offset; |
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109 } |
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110 |
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111 |
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112 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) { |
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113 int offset = offset_for_field(field_name, object, |
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114 vmSymbols::string_signature()); |
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115 oop string = object->obj_field(offset); |
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116 if (string == NULL) { |
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117 return NULL; |
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118 } |
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119 const char* ret = java_lang_String::as_utf8_string(string); |
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120 return ret; |
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121 } |
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122 |
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123 bool WhiteBox::lookup_bool(const char* field_name, oop object) { |
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124 int offset = |
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125 offset_for_field(field_name, object, vmSymbols::bool_signature()); |
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126 bool ret = (object->bool_field(offset) == JNI_TRUE); |
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127 return ret; |
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128 } |
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129 |
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130 |
5915 | 131 #define CC (char*) |
132 | |
133 static JNINativeMethod methods[] = { | |
134 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress }, | |
135 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize }, | |
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136 {CC "parseCommandLine", |
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137 CC "(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;", |
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138 (void*) &WB_ParseCommandLine |
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139 }, |
5915 | 140 #ifndef SERIALGC |
141 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark}, | |
142 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous }, | |
143 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions }, | |
144 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize }, | |
145 #endif // !SERIALGC | |
146 }; | |
147 | |
148 #undef CC | |
149 | |
150 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass)) | |
151 { | |
152 if (WhiteBoxAPI) { | |
153 // Make sure that wbclass is loaded by the null classloader | |
154 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass()); | |
155 Handle loader(ikh->class_loader()); | |
156 if (loader.is_null()) { | |
157 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI | |
158 jint result = env->RegisterNatives(wbclass, methods, sizeof(methods)/sizeof(methods[0])); | |
159 if (result == 0) { | |
160 WhiteBox::set_used(); | |
161 } | |
162 } | |
163 } | |
164 } | |
165 JVM_END |