1213 
1214 
1215 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1216   JVMWrapper("JVM_GetStackAccessControlContext");
1217   if (!UsePrivilegedStack) return NULL;
1218 
1219   ResourceMark rm(THREAD);
1220   GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1221   JvmtiVMObjectAllocEventCollector oam;
1222 
1223   // count the protection domains on the execution stack. We collapse
1224   // duplicate consecutive protection domains into a single one, as
1225   // well as stopping when we hit a privileged frame.
1226 
1227   oop previous_protection_domain = NULL;
1228   Handle privileged_context(thread, NULL);
1229   bool is_privileged = false;
1230   oop protection_domain = NULL;
1231 
1232   // Iterate through Java frames
1233   RegisterMap reg_map(thread);
1234   javaVFrame *vf = thread->last_java_vframe(&reg_map);
1235   for (; vf != NULL; vf = vf->java_sender()) {
1236     // get method of frame
1237     Method* method = vf->method();
1238 
1239     // stop at the first privileged frame
1240     if (method->method_holder() == SystemDictionary::AccessController_klass() &&
1241       method->name() == vmSymbols::executePrivileged_name())
1242     {
1243       // this frame is privileged
1244       is_privileged = true;
1245 
1246       javaVFrame *priv = vf;                        // executePrivileged
1247       javaVFrame *caller_fr = priv->java_sender();  // doPrivileged
1248       caller_fr = caller_fr->java_sender();         // caller
1249 
1250       StackValueCollection* locals = priv->locals();
1251       privileged_context = locals->obj_at(1);
1252       Handle caller      = locals->obj_at(2);
1253 
1254       Klass *caller_klass = java_lang_Class::as_Klass(caller());
1255       protection_domain  = caller_klass->protection_domain();
1256     } else {
1257       protection_domain = method->method_holder()->protection_domain();
1258     }
1259 
1260     if ((!oopDesc::equals(previous_protection_domain, protection_domain)) && (protection_domain != NULL)) {
1261       local_array->push(protection_domain);
1262       previous_protection_domain = protection_domain;
1263     }
1264 
1265     if (is_privileged) break;
1266   }
1267 
1268 

1213 
1214 
1215 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1216   JVMWrapper("JVM_GetStackAccessControlContext");
1217   if (!UsePrivilegedStack) return NULL;
1218 
1219   ResourceMark rm(THREAD);
1220   GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1221   JvmtiVMObjectAllocEventCollector oam;
1222 
1223   // count the protection domains on the execution stack. We collapse
1224   // duplicate consecutive protection domains into a single one, as
1225   // well as stopping when we hit a privileged frame.
1226 
1227   oop previous_protection_domain = NULL;
1228   Handle privileged_context(thread, NULL);
1229   bool is_privileged = false;
1230   oop protection_domain = NULL;
1231 
1232   // Iterate through Java frames
1233   vframeStream vfst(thread);
1234   for(; !vfst.at_end(); vfst.next()) {

1235     // get method of frame
1236     Method* method = vfst.method();
1237 
1238     // stop at the first privileged frame
1239     if (method->method_holder() == SystemDictionary::AccessController_klass() &&
1240       method->name() == vmSymbols::executePrivileged_name())
1241     {
1242       // this frame is privileged
1243       is_privileged = true;
1244 
1245       javaVFrame *priv = vfst.asJavaVFrame();       // executePrivileged


1246 
1247       StackValueCollection* locals = priv->locals();
1248       privileged_context = locals->obj_at(1);
1249       Handle caller      = locals->obj_at(2);
1250 
1251       Klass *caller_klass = java_lang_Class::as_Klass(caller());
1252       protection_domain  = caller_klass->protection_domain();
1253     } else {
1254       protection_domain = method->method_holder()->protection_domain();
1255     }
1256 
1257     if ((!oopDesc::equals(previous_protection_domain, protection_domain)) && (protection_domain != NULL)) {
1258       local_array->push(protection_domain);
1259       previous_protection_domain = protection_domain;
1260     }
1261 
1262     if (is_privileged) break;
1263   }
1264 
1265