| /* |
| * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include "jvmti.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #ifndef JNI_ENV_ARG |
| |
| #ifdef __cplusplus |
| #define JNI_ENV_ARG(x, y) y |
| #define JNI_ENV_PTR(x) x |
| #else |
| #define JNI_ENV_ARG(x,y) x, y |
| #define JNI_ENV_PTR(x) (*x) |
| #endif |
| |
| #endif |
| |
| #define TranslateError(err) "JVMTI error" |
| |
| #define PASSED 0 |
| #define FAILED 2 |
| |
| static const char *EXC_CNAME = "java/lang/AssertionError"; |
| |
| static jvmtiEnv *jvmti = NULL; |
| static jint result = PASSED; |
| static jboolean printdump = JNI_FALSE; |
| |
| static jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved); |
| |
| JNIEXPORT |
| jint JNICALL Agent_OnLoad(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| |
| JNIEXPORT |
| jint JNICALL Agent_OnAttach(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| |
| JNIEXPORT |
| jint JNICALL JNI_OnLoad(JavaVM *jvm, void *reserved) { |
| return JNI_VERSION_1_8; |
| } |
| |
| static |
| jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) { |
| jint res; |
| |
| if (options != NULL && strcmp(options, "printdump") == 0) { |
| printdump = JNI_TRUE; |
| } |
| |
| res = JNI_ENV_PTR(jvm)->GetEnv(JNI_ENV_ARG(jvm, (void **) &jvmti), |
| JVMTI_VERSION_9); |
| if (res != JNI_OK || jvmti == NULL) { |
| printf(" Error: wrong result of a valid call to GetEnv!\n"); |
| return JNI_ERR; |
| } |
| |
| return JNI_OK; |
| } |
| |
| static |
| jclass find_class(JNIEnv *env, const char* cname) { |
| jclass cls = JNI_ENV_PTR(env)->FindClass(JNI_ENV_ARG(env, cname)); |
| |
| if (cls == NULL) { |
| printf("find_class: Error: FindClass(env, \"%s\") returned NULL\n", cname); |
| } |
| return cls; |
| } |
| |
| static |
| jint throw_exc(JNIEnv *env, char *msg) { |
| jclass exc_class = find_class(env, EXC_CNAME); |
| |
| if (exc_class == NULL) { |
| printf("throw_exc: Error in find_class(env, \"%s\")\n", EXC_CNAME); |
| return -1; |
| } |
| return JNI_ENV_PTR(env)->ThrowNew(JNI_ENV_ARG(env, exc_class), msg); |
| } |
| |
| static jobject get_module_by_class_name(JNIEnv *env, const char* cname) { |
| jobject module = NULL; |
| jclass cls = find_class(env, cname); |
| |
| printf(">>> getting module by class name: \"%s\"\n", cname); |
| if (cls == NULL) { |
| printf("get_module_by_class_name: Error in find_class(env, \"%s\")\n", cname); |
| return NULL; |
| } |
| module = JNI_ENV_PTR(env)->GetModule(JNI_ENV_ARG(env, cls)); |
| if (module == NULL) { |
| printf("get_module_by_class_name: Error in GetModule for class \"%s\"\n", cname); |
| } |
| return module; |
| } |
| |
| static |
| jint check_is_modifiable_error_codes(jobject module, jobject not_a_module) { |
| jvmtiError err = JVMTI_ERROR_NONE; |
| jboolean is_modifiable = JNI_FALSE; |
| |
| printf(">>> passing a bad module argument to JVMTI IsModifiableModule\n"); |
| err = (*jvmti)->IsModifiableModule(jvmti, not_a_module, &is_modifiable); |
| if (err != JVMTI_ERROR_INVALID_MODULE) { |
| printf(" Error #EC0: Did not get expected INVALID_MODULE error code from" |
| " IsModifiableModule: %s (%d)\n", TranslateError(err), err); |
| return FAILED; |
| } |
| printf(">>> passing NULL module argument to JVMTI IsModifiableModule\n"); |
| err = (*jvmti)->IsModifiableModule(jvmti, NULL, &is_modifiable); |
| if (err != JVMTI_ERROR_NULL_POINTER) { |
| printf(" Error #EC1: Did not get expected NULL_POINTER error code from" |
| " IsModifiableModule: %s (%d)\n", TranslateError(err), err); |
| return FAILED; |
| } |
| printf(">>> passing NULL status pointer to JVMTI IsModifiableModule\n"); |
| err = (*jvmti)->IsModifiableModule(jvmti, module, NULL); |
| if (err != JVMTI_ERROR_NULL_POINTER) { |
| printf(" Error #EC2: Did not get expected NULL_POINTER error code from" |
| " IsModifiableModule: %s (%d)\n", TranslateError(err), err); |
| return FAILED; |
| } |
| return PASSED; |
| } |
| |
| static |
| jint check_is_modifiable(jobject module) { |
| jvmtiError err = JVMTI_ERROR_NONE; |
| jboolean is_modifiable = JNI_FALSE; |
| |
| printf(">>> checking module %p is modifiable\n", module); |
| err = (*jvmti)->IsModifiableModule(jvmti, module, &is_modifiable); |
| if (err != JVMTI_ERROR_NONE) { |
| printf(" Error in IsModifiableModule for module %p: %s (%d)\n", |
| module, TranslateError(err), err); |
| return FAILED; |
| } |
| if (is_modifiable == JNI_FALSE) { |
| printf(" unexpected non-modifiable status for module: %p\n", module); |
| return FAILED; |
| } |
| return PASSED; |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_MyPackage_IsModifiableModuleTest_check(JNIEnv *env, jclass cls) { |
| jobject module = NULL; |
| |
| if (jvmti == NULL) { |
| throw_exc(env, "JVMTI client was not properly loaded!\n"); |
| return FAILED; |
| } |
| |
| printf("\n*** Testing IsModifiableModule ***\n\n"); |
| |
| if (check_is_modifiable_error_codes(module, cls) == FAILED) { |
| throw_exc(env, "check #MM0: failed to return expected error code from " |
| "a bad call to JVMTI IsModifiableModule"); |
| return FAILED; |
| } |
| |
| module = get_module_by_class_name(env, "java/lang/Class"); |
| if (check_is_modifiable(module) == FAILED) { |
| throw_exc(env, "check #MM1: failed to return modifiable module status"); |
| return FAILED; |
| } |
| |
| module = get_module_by_class_name(env, "com/sun/jdi/VirtualMachine"); |
| if (check_is_modifiable(module) == FAILED) { |
| throw_exc(env, "check #MM2: failed to return modifiable module status"); |
| return FAILED; |
| } |
| |
| module = get_module_by_class_name(env, "MyPackage/IsModifiableModuleTest"); |
| if (check_is_modifiable(module) == FAILED) { |
| throw_exc(env, "check #MM3: failed to return modifiable module status"); |
| return FAILED; |
| } |
| |
| return PASSED; |
| } |
| |
| #ifdef __cplusplus |
| } |
| #endif |