author | kamg |
Thu, 08 May 2008 09:16:03 -0400 | |
changeset 491 | a394684ccfe6 |
parent 406 | bde3a21bcab0 |
child 5506 | 202f599c92aa |
permissions | -rw-r--r-- |
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/* |
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* Copyright 2008 Sun Microsystems, Inc. All Rights Reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Sun designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Sun in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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* CA 95054 USA or visit www.sun.com if you need additional information or |
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* have any questions. |
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*/ |
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#include <stdlib.h> |
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#include "jvm.h" |
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#include "jni.h" |
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#include "jni_util.h" |
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#include "jvm_symbols.h" |
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#include "sun_tracing_dtrace_JVM.h" |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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static JvmSymbols* jvm_symbols = NULL; |
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static void initialize() { |
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static int initialized = 0; |
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if (initialized == 0) { |
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jvm_symbols = lookupJvmSymbols(); |
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initialized = 1; |
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} |
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} |
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/* |
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* Class: sun_tracing_dtrace_JVM |
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* Method: isSupported0 |
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* Signature: ()I |
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*/ |
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JNIEXPORT jboolean JNICALL Java_sun_tracing_dtrace_JVM_isSupported0( |
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JNIEnv* env, jclass cls) { |
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initialize(); |
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if (jvm_symbols != NULL) { |
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return jvm_symbols->IsSupported(env) ? JNI_TRUE : JNI_FALSE; |
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} else { |
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return JNI_FALSE; |
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} |
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} |
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// Macros that cause an immediate return if we detect an exception |
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#define CHECK if ((*env)->ExceptionOccurred(env)) { return; } |
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#define CHECK_(x) if ((*env)->ExceptionOccurred(env)) { return x; } |
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static void readProbeData ( |
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JNIEnv* env, jobject probe, JVM_DTraceProbe* jvm_probe) { |
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jclass clazz; |
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jmethodID mid; |
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jobject method; |
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if (jvm_probe == NULL) { |
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return; // just in case |
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} |
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clazz = (*env)->GetObjectClass(env, probe); CHECK |
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mid = (*env)->GetMethodID( |
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env, clazz, "getFunctionName", "()Ljava/lang/String;"); CHECK |
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jvm_probe->function = (jstring)(*env)->CallObjectMethod( |
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env, probe, mid); CHECK |
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mid = (*env)->GetMethodID( |
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env, clazz, "getProbeName", "()Ljava/lang/String;"); CHECK |
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jvm_probe->name = (jstring)(*env)->CallObjectMethod(env, probe, mid); CHECK |
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mid = (*env)->GetMethodID( |
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env, clazz, "getMethod", "()Ljava/lang/reflect/Method;"); CHECK |
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method = (*env)->CallObjectMethod(env, probe, mid); CHECK |
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jvm_probe->method = (*env)->FromReflectedMethod(env, method); CHECK |
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} |
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static void readFieldInterfaceAttributes( |
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char* annotationName, JNIEnv* env, jobject provider, |
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JVM_DTraceInterfaceAttributes* attrs) { |
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jobject result; |
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jobject result_clazz; |
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jclass provider_clazz; |
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jclass annotation_clazz; |
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jmethodID get; |
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jmethodID enc; |
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provider_clazz = (*env)->GetObjectClass(env, provider); CHECK |
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annotation_clazz = (*env)->FindClass(env, annotationName); CHECK |
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get = (*env)->GetMethodID(env, provider_clazz, "getNameStabilityFor", |
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"(Ljava/lang/Class;)Lcom/sun/tracing/dtrace/StabilityLevel;"); CHECK |
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result = (*env)->CallObjectMethod( |
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env, provider, get, annotation_clazz); CHECK |
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result_clazz = (*env)->GetObjectClass(env, result); CHECK |
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enc = (*env)->GetMethodID(env, result_clazz, "getEncoding", "()I"); CHECK |
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attrs->nameStability = (*env)->CallIntMethod(env, result, enc); CHECK |
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get = (*env)->GetMethodID(env, provider_clazz, "getDataStabilityFor", |
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"(Ljava/lang/Class;)Lcom/sun/tracing/dtrace/StabilityLevel;"); CHECK |
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result = (*env)->CallObjectMethod( |
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env, provider, get, annotation_clazz); CHECK |
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result_clazz = (*env)->GetObjectClass(env, result); CHECK |
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121 |
enc = (*env)->GetMethodID(env, result_clazz, "getEncoding", "()I"); CHECK |
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122 |
attrs->dataStability = (*env)->CallIntMethod(env, result, enc); CHECK |
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|
123 |
|
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124 |
get = (*env)->GetMethodID(env, provider_clazz, "getDependencyClassFor", |
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125 |
"(Ljava/lang/Class;)Lcom/sun/tracing/dtrace/DependencyClass;"); CHECK |
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126 |
result = (*env)->CallObjectMethod( |
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|
127 |
env, provider, get, annotation_clazz); CHECK |
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128 |
result_clazz = (*env)->GetObjectClass(env, result); CHECK |
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|
129 |
enc = (*env)->GetMethodID(env, result_clazz, "getEncoding", "()I"); CHECK |
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|
130 |
attrs->dependencyClass = (*env)->CallIntMethod(env, result, enc); CHECK |
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131 |
} |
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|
132 |
|
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133 |
static void readInterfaceAttributes( |
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134 |
JNIEnv* env, jobject provider, JVM_DTraceProvider* jvm_provider) { |
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|
135 |
readFieldInterfaceAttributes("com/sun/tracing/dtrace/ProviderAttributes", |
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|
136 |
env, provider, &(jvm_provider->providerAttributes)); |
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|
137 |
readFieldInterfaceAttributes("com/sun/tracing/dtrace/ModuleAttributes", |
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|
138 |
env, provider, &(jvm_provider->moduleAttributes)); |
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|
139 |
readFieldInterfaceAttributes("com/sun/tracing/dtrace/FunctionAttributes", |
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|
140 |
env, provider, &(jvm_provider->functionAttributes)); |
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|
141 |
readFieldInterfaceAttributes("com/sun/tracing/dtrace/NameAttributes", |
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|
142 |
env, provider, &(jvm_provider->nameAttributes)); |
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|
143 |
readFieldInterfaceAttributes("com/sun/tracing/dtrace/ArgsAttributes", |
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|
144 |
env, provider, &(jvm_provider->argsAttributes)); |
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|
145 |
} |
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|
146 |
|
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147 |
static void readProviderData( |
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|
148 |
JNIEnv* env, jobject provider, JVM_DTraceProvider* jvm_provider) { |
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|
149 |
jmethodID mid; |
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|
150 |
jobjectArray probes; |
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|
151 |
jsize i; |
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|
152 |
jclass clazz = (*env)->GetObjectClass(env, provider); CHECK |
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|
153 |
mid = (*env)->GetMethodID( |
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|
154 |
env, clazz, "getProbes", "()[Lsun/tracing/dtrace/DTraceProbe;"); CHECK |
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|
155 |
probes = (jobjectArray)(*env)->CallObjectMethod( |
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|
156 |
env, provider, mid); CHECK |
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|
157 |
|
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158 |
// Fill JVM structure, describing provider |
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|
159 |
jvm_provider->probe_count = (*env)->GetArrayLength(env, probes); CHECK |
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|
160 |
jvm_provider->probes = (JVM_DTraceProbe*)calloc( |
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|
161 |
jvm_provider->probe_count, sizeof(*jvm_provider->probes)); |
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|
162 |
mid = (*env)->GetMethodID( |
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|
163 |
env, clazz, "getProviderName", "()Ljava/lang/String;"); CHECK |
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|
164 |
jvm_provider->name = (jstring)(*env)->CallObjectMethod( |
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|
165 |
env, provider, mid); CHECK |
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|
166 |
|
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|
167 |
readInterfaceAttributes(env, provider, jvm_provider); CHECK |
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|
168 |
|
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|
169 |
for (i = 0; i < jvm_provider->probe_count; ++i) { |
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|
170 |
jobject probe = (*env)->GetObjectArrayElement(env, probes, i); CHECK |
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|
171 |
readProbeData(env, probe, &jvm_provider->probes[i]); CHECK |
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|
172 |
} |
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|
173 |
} |
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|
174 |
|
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|
175 |
/* |
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|
176 |
* Class: sun_tracing_dtrace_JVM |
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|
177 |
* Method: activate0 |
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|
178 |
* Signature: ()J |
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|
179 |
*/ |
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|
180 |
JNIEXPORT jlong JNICALL Java_sun_tracing_dtrace_JVM_activate0( |
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|
181 |
JNIEnv* env, jclass cls, jstring moduleName, jobjectArray providers) { |
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|
182 |
jlong handle = 0; |
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|
183 |
jsize num_providers; |
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|
184 |
jsize i; |
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|
185 |
JVM_DTraceProvider* jvm_providers; |
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|
186 |
|
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|
187 |
initialize(); |
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|
188 |
|
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|
189 |
if (jvm_symbols == NULL) { |
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|
190 |
return 0; |
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|
191 |
} |
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changeset
|
192 |
|
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|
193 |
num_providers = (*env)->GetArrayLength(env, providers); CHECK_(0L) |
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|
194 |
|
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|
195 |
jvm_providers = (JVM_DTraceProvider*)calloc( |
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|
196 |
num_providers, sizeof(*jvm_providers)); |
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changeset
|
197 |
|
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|
198 |
for (i = 0; i < num_providers; ++i) { |
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|
199 |
JVM_DTraceProvider* p = &(jvm_providers[i]); |
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|
200 |
jobject provider = (*env)->GetObjectArrayElement( |
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changeset
|
201 |
env, providers, i); |
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|
202 |
readProviderData(env, provider, p); |
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|
203 |
} |
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|
204 |
|
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|
205 |
handle = jvm_symbols->Activate( |
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|
206 |
env, JVM_TRACING_DTRACE_VERSION, moduleName, |
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|
207 |
num_providers, jvm_providers); |
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changeset
|
208 |
|
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|
209 |
for (i = 0; i < num_providers; ++i) { |
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|
210 |
JVM_DTraceProvider* p = &(jvm_providers[i]); |
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|
211 |
free(p->probes); |
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|
212 |
} |
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|
213 |
free(jvm_providers); |
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|
214 |
|
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|
215 |
return handle; |
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|
216 |
} |
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|
217 |
|
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|
218 |
/* |
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|
219 |
* Class: sun_tracing_dtrace_JVM |
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|
220 |
* Method: dispose0 |
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|
221 |
* Signature: (J)V |
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|
222 |
*/ |
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|
223 |
JNIEXPORT void JNICALL Java_sun_tracing_dtrace_JVM_dispose0( |
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|
224 |
JNIEnv* env, jclass cls, jlong handle) { |
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|
225 |
if (jvm_symbols != NULL && handle != 0) { |
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|
226 |
jvm_symbols->Dispose(env, handle); |
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|
227 |
} |
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|
228 |
} |
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|
229 |
|
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|
230 |
/* |
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|
231 |
* Class: sun_tracing_dtrace_JVM |
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|
232 |
* Method: isEnabled0 |
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|
233 |
* Signature: (Ljava/lang/String;Ljava/lang/String;)Z |
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|
234 |
*/ |
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|
235 |
JNIEXPORT jboolean JNICALL Java_sun_tracing_dtrace_JVM_isEnabled0( |
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|
236 |
JNIEnv* env, jclass cls, jobject method) { |
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|
237 |
jmethodID mid; |
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238 |
if (jvm_symbols != NULL && method != NULL) { |
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mid = (*env)->FromReflectedMethod(env, method); |
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return jvm_symbols->IsProbeEnabled(env, mid); |
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} |
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return JNI_FALSE; |
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} |
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|
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/* |
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* Class: sun_tracing_dtrace_JVM |
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* Method: defineClass0 |
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* Signature: (Ljava/lang/ClassLoader;Ljava/lang/String;[BII)Ljava/lang/Class; |
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* |
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* The implementation of this native static method is a copy of that of |
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251 |
* the native instance method Java_java_lang_ClassLoader_defineClass0() |
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* with the implicit "this" parameter becoming the "loader" parameter. |
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253 |
* |
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* This code was cloned and modified from java_lang_reflect_Proxy |
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*/ |
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256 |
JNIEXPORT jclass JNICALL |
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257 |
Java_sun_tracing_dtrace_JVM_defineClass0( |
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258 |
JNIEnv *env, jclass ignore, jobject loader, jstring name, jbyteArray data, |
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259 |
jint offset, jint length) |
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260 |
{ |
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261 |
jbyte *body; |
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262 |
char *utfName; |
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263 |
jclass result = 0; |
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264 |
char buf[128]; |
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265 |
|
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266 |
if (data == NULL) { |
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267 |
return 0; |
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268 |
} |
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269 |
|
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270 |
/* Work around 4153825. malloc crashes on Solaris when passed a |
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* negative size. |
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272 |
*/ |
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273 |
if (length < 0) { |
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274 |
return 0; |
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275 |
} |
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276 |
|
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277 |
body = (jbyte *)malloc(length); |
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278 |
|
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279 |
if (body == 0) { |
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280 |
return 0; |
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|
281 |
} |
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282 |
|
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283 |
(*env)->GetByteArrayRegion(env, data, offset, length, body); |
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|
284 |
|
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|
285 |
if ((*env)->ExceptionOccurred(env)) |
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286 |
goto free_body; |
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|
287 |
|
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288 |
if (name != NULL) { |
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289 |
int i; |
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290 |
int len = (*env)->GetStringUTFLength(env, name); |
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291 |
int unicode_len = (*env)->GetStringLength(env, name); |
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292 |
if (len >= sizeof(buf)) { |
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293 |
utfName = malloc(len + 1); |
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294 |
if (utfName == NULL) { |
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|
295 |
goto free_body; |
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|
296 |
} |
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|
297 |
} else { |
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298 |
utfName = buf; |
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|
299 |
} |
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300 |
(*env)->GetStringUTFRegion(env, name, 0, unicode_len, utfName); |
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|
301 |
|
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302 |
// Convert '.' to '/' in the package name |
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303 |
for (i = 0; i < unicode_len; ++i) { |
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|
304 |
if (utfName[i] == '.') { |
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|
305 |
utfName[i] = '/'; |
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|
306 |
} |
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|
307 |
} |
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|
308 |
} else { |
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|
309 |
utfName = NULL; |
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|
310 |
} |
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|
311 |
|
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|
312 |
result = (*env)->DefineClass(env, utfName, loader, body, length); |
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|
313 |
|
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|
314 |
if (utfName && utfName != buf) |
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|
315 |
free(utfName); |
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|
316 |
|
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|
317 |
free_body: |
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|
318 |
free(body); |
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|
319 |
return result; |
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|
320 |
} |
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|
321 |
|
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|
322 |
#ifdef __cplusplus |
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|
323 |
} |
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|
324 |
#endif |