261 lines
9.5 KiB
C
261 lines
9.5 KiB
C
/*
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* Copyright (c) 2019, 2022, Oracle and/or its affiliates. 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.
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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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#ifdef AIX
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#include <pthread.h>
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#endif //AIX
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#include "jni.h"
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#include "assert.h"
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static jclass classClass;
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static jclass iaeClass;
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static jmethodID mid_Class_forName;
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static jmethodID mid_Class_getField;
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static jmethodID mid_Field_get;
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static jmethodID mid_Field_canAccess;
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static jmethodID mid_Field_trySetAccessible;
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static jmethodID mid_Field_setAccessible;
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int getField(JNIEnv *env, char* declaringClass_name, char* field_name);
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int checkAndClearIllegalAccessExceptionThrown(JNIEnv *env);
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int setAccessible(JNIEnv *env, char* declaringClass_name, char* field_name);
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int trySetAccessible(JNIEnv *env, char* declaringClass_name, char* field_name, jboolean canAccess);
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int checkAccess(JNIEnv *env, char* declaringClass_name, char* field_name, jboolean canAccess);
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static void* run(void* argp) {
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JavaVM *jvm;
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JNIEnv *env;
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JavaVMInitArgs vm_args;
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JavaVMOption options[1];
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jint rc;
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vm_args.version = JNI_VERSION_1_2;
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vm_args.nOptions = 0;
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vm_args.options = options;
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if ((rc = JNI_CreateJavaVM(&jvm, (void**)&env, &vm_args)) != JNI_OK) {
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printf("ERROR: cannot create VM.\n");
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exit(-1);
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}
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classClass = (*env)->FindClass(env, "java/lang/Class");
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iaeClass = (*env)->FindClass(env, "java/lang/IllegalAccessException");
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mid_Class_forName = (*env)->GetStaticMethodID(env, classClass, "forName",
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"(Ljava/lang/String;)Ljava/lang/Class;");
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assert(mid_Class_forName != NULL);
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mid_Class_getField = (*env)->GetMethodID(env, classClass, "getField",
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"(Ljava/lang/String;)Ljava/lang/reflect/Field;");
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assert(mid_Class_getField != NULL);
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jclass fieldClass = (*env)->FindClass(env, "java/lang/reflect/Field");
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mid_Field_get = (*env)->GetMethodID(env, fieldClass, "get", "(Ljava/lang/Object;)Ljava/lang/Object;");
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assert(mid_Class_getField != NULL);
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mid_Field_canAccess = (*env)->GetMethodID(env, fieldClass, "canAccess", "(Ljava/lang/Object;)Z");
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assert(mid_Field_canAccess != NULL);
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mid_Field_setAccessible = (*env)->GetMethodID(env, fieldClass, "setAccessible", "(Z)V");
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assert(mid_Field_setAccessible != NULL);
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mid_Field_trySetAccessible = (*env)->GetMethodID(env, fieldClass, "trySetAccessible", "()Z");
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assert(mid_Field_trySetAccessible != NULL);
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// can access to public member of an exported type
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if ((rc = getField(env, "java.lang.Integer", "TYPE")) != 0) {
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printf("ERROR: fail to access java.lang.Integer::TYPE\n");
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exit(-1);
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}
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// expect IAE to jdk.internal.misc.Unsafe class
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if ((rc = getField(env, "jdk.internal.misc.Unsafe", "INVALID_FIELD_OFFSET")) == 0) {
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printf("ERROR: IAE not thrown\n");
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exit(-1);
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}
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if (checkAndClearIllegalAccessExceptionThrown(env) != JNI_TRUE) {
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printf("ERROR: exception is not an instance of IAE\n");
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exit(-1);
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}
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// expect IAE to jdk.internal.misc.Unsafe class
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if ((rc = getField(env, "jdk.internal.misc.Unsafe", "INVALID_FIELD_OFFSET")) == 0) {
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printf("ERROR: IAE not thrown\n");
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exit(-1);
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}
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if (checkAndClearIllegalAccessExceptionThrown(env) != JNI_TRUE) {
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printf("ERROR: exception is not an instance of IAE\n");
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exit(-1);
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}
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// expect IAE to jdk.internal.misc.Unsafe class
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if ((rc = setAccessible(env, "jdk.internal.misc.Unsafe", "INVALID_FIELD_OFFSET")) == 0) {
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printf("ERROR: IAE not thrown\n");
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exit(-1);
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}
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if (checkAndClearIllegalAccessExceptionThrown(env) != JNI_TRUE) {
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printf("ERROR: exception is not an instance of IAE\n");
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exit(-1);
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}
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if ((rc = trySetAccessible(env, "java.lang.reflect.Modifier", "PUBLIC", JNI_TRUE)) != 0) {
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printf("ERROR: unexpected result from trySetAccessible on Modifier::PUBLIC field\n");
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exit(-1);
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}
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if ((rc = trySetAccessible(env, "jdk.internal.misc.Unsafe", "INVALID_FIELD_OFFSET", JNI_FALSE)) != 0) {
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printf("ERROR: unexpected result from trySetAccessible on Unsafe public field\n");
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exit(-1);
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}
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if ((rc = checkAccess(env, "java.lang.reflect.Modifier", "PUBLIC", JNI_TRUE)) != 0) {
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printf("ERROR: unexpected result from trySetAccessible on Modifier::PUBLIC field\n");
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exit(-1);
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}
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if ((rc = checkAccess(env, "jdk.internal.misc.Unsafe", "INVALID_FIELD_OFFSET", JNI_FALSE)) != 0) {
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printf("ERROR: unexpected result from trySetAccessible on Unsafe public field\n");
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}
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(*jvm)->DestroyJavaVM(jvm);
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return 0;
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}
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int checkAndClearIllegalAccessExceptionThrown(JNIEnv *env) {
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jthrowable t = (*env)->ExceptionOccurred(env);
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if ((*env)->IsInstanceOf(env, t, iaeClass) == JNI_TRUE) {
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(*env)->ExceptionClear(env);
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return JNI_TRUE;
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}
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return JNI_FALSE;
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}
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int getField(JNIEnv *env, char* declaringClass_name, char* field_name) {
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jobject c = (*env)->CallStaticObjectMethod(env, classClass, mid_Class_forName,
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(*env)->NewStringUTF(env, declaringClass_name));
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if ((*env)->ExceptionOccurred(env) != NULL) {
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(*env)->ExceptionDescribe(env);
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return 1;
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}
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jobject f = (*env)->CallObjectMethod(env, c, mid_Class_getField, (*env)->NewStringUTF(env, field_name));
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if ((*env)->ExceptionOccurred(env) != NULL) {
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(*env)->ExceptionDescribe(env);
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return 2;
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}
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jobject v = (*env)->CallObjectMethod(env, f, mid_Field_get, c);
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if ((*env)->ExceptionOccurred(env) != NULL) {
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(*env)->ExceptionDescribe(env);
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return 3;
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}
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return 0;
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}
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int setAccessible(JNIEnv *env, char* declaringClass_name, char* field_name) {
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jobject c = (*env)->CallStaticObjectMethod(env, classClass, mid_Class_forName,
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(*env)->NewStringUTF(env, declaringClass_name));
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if ((*env)->ExceptionOccurred(env) != NULL) {
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(*env)->ExceptionDescribe(env);
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return 1;
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}
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jobject f = (*env)->CallObjectMethod(env, c, mid_Class_getField, (*env)->NewStringUTF(env, field_name));
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if ((*env)->ExceptionOccurred(env) != NULL) {
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(*env)->ExceptionDescribe(env);
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return 2;
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}
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(*env)->CallVoidMethod(env, f, mid_Field_setAccessible, JNI_TRUE);
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if ((*env)->ExceptionOccurred(env) != NULL) {
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(*env)->ExceptionDescribe(env);
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return 3;
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}
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return 0;
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}
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int trySetAccessible(JNIEnv *env, char* declaringClass_name, char* field_name, jboolean canAccess) {
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jobject c = (*env)->CallStaticObjectMethod(env, classClass, mid_Class_forName,
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(*env)->NewStringUTF(env, declaringClass_name));
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if ((*env)->ExceptionOccurred(env) != NULL) {
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(*env)->ExceptionDescribe(env);
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return 1;
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}
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jobject f = (*env)->CallObjectMethod(env, c, mid_Class_getField, (*env)->NewStringUTF(env, field_name));
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if ((*env)->ExceptionOccurred(env) != NULL) {
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(*env)->ExceptionDescribe(env);
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return 2;
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}
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jboolean rc = (*env)->CallBooleanMethod(env, f, mid_Field_trySetAccessible);
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if ((*env)->ExceptionOccurred(env) != NULL) {
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(*env)->ExceptionDescribe(env);
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return 3;
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}
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if (rc != canAccess) {
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return 4;
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}
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return 0;
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}
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int checkAccess(JNIEnv *env, char* declaringClass_name, char* field_name, jboolean canAccess) {
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jobject c = (*env)->CallStaticObjectMethod(env, classClass, mid_Class_forName,
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(*env)->NewStringUTF(env, declaringClass_name));
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if ((*env)->ExceptionOccurred(env) != NULL) {
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(*env)->ExceptionDescribe(env);
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return 1;
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}
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jobject f = (*env)->CallObjectMethod(env, c, mid_Class_getField, (*env)->NewStringUTF(env, field_name));
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if ((*env)->ExceptionOccurred(env) != NULL) {
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(*env)->ExceptionDescribe(env);
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return 2;
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}
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jboolean rc = (*env)->CallBooleanMethod(env, f, mid_Field_canAccess, NULL);
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if ((*env)->ExceptionOccurred(env) != NULL) {
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(*env)->ExceptionDescribe(env);
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return 3;
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}
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if (rc != canAccess) {
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return 4;
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}
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return 0;
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}
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int main(int argc, char *argv[]) {
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#ifdef AIX
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size_t adjusted_stack_size = 1024*1024;
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pthread_t id;
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int result;
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pthread_attr_t attr;
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pthread_attr_init(&attr);
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pthread_attr_setstacksize(&attr, adjusted_stack_size);
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result = pthread_create(&id, &attr, run, (void *)&argv);
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if (result != 0) {
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fprintf(stderr, "Error: pthread_create failed with error code %d \n", result);
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return -1;
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}
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pthread_join(id, NULL);
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#else
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run(&argv);
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#endif //AIX
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}
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