303 lines
10 KiB
C
303 lines
10 KiB
C
/*
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* Copyright (c) 2016, 2017, 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 <string.h>
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#include "jvmti.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef JNI_ENV_ARG
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#ifdef __cplusplus
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#define JNI_ENV_ARG(x, y) y
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#define JNI_ENV_PTR(x) x
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#else
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#define JNI_ENV_ARG(x,y) x, y
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#define JNI_ENV_PTR(x) (*x)
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#endif
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#endif
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#define TranslateError(err) "JVMTI error"
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#define PASSED 0
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#define FAILED 2
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static const char *EXC_CNAME = "java/lang/Exception";
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static const char* MOD_CNAME = "Ljava/lang/Module;";
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static jvmtiEnv *jvmti = NULL;
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static jint result = PASSED;
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static jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved);
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JNIEXPORT
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jint JNICALL Agent_OnLoad(JavaVM *jvm, char *options, void *reserved) {
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return Agent_Initialize(jvm, options, reserved);
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}
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JNIEXPORT
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jint JNICALL Agent_OnAttach(JavaVM *jvm, char *options, void *reserved) {
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return Agent_Initialize(jvm, options, reserved);
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}
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JNIEXPORT
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jint JNICALL JNI_OnLoad(JavaVM *jvm, void *reserved) {
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return JNI_VERSION_1_8;
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}
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static
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jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
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jint res = JNI_ENV_PTR(jvm)->GetEnv(JNI_ENV_ARG(jvm, (void **) &jvmti),
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JVMTI_VERSION_9);
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if (res != JNI_OK || jvmti == NULL) {
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printf(" Error: wrong result of a valid call to GetEnv!\n");
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return JNI_ERR;
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}
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return JNI_OK;
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}
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static
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void throw_exc(JNIEnv *env, char *msg) {
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jclass exc_class = JNI_ENV_PTR(env)->FindClass(JNI_ENV_ARG(env, EXC_CNAME));
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jint rt = JNI_OK;
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if (exc_class == NULL) {
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printf("throw_exc: Error in FindClass(env, %s)\n", EXC_CNAME);
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return;
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}
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rt = JNI_ENV_PTR(env)->ThrowNew(JNI_ENV_ARG(env, exc_class), msg);
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if (rt == JNI_ERR) {
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printf("throw_exc: Error in JNI ThrowNew(env, %s)\n", msg);
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}
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}
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static
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jclass jlM(JNIEnv *env) {
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jclass cls = NULL;
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cls = JNI_ENV_PTR(env)->FindClass(JNI_ENV_ARG(env, MOD_CNAME));
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if (cls == NULL) {
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printf(" Error in JNI FindClass: %s\n", MOD_CNAME);
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}
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return cls;
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}
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jmethodID
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get_method(JNIEnv *env, jclass clazz, const char * name, const char *sig) {
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jmethodID method = NULL;
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method = JNI_ENV_PTR(env)->GetMethodID(JNI_ENV_ARG(env, clazz), name, sig);
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if (method == NULL) {
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printf(" Error in JNI GetMethodID %s with signature %s", name, sig);
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}
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return method;
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}
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static
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jboolean is_exported(JNIEnv *env, jobject module, const char* pkg, jboolean open) {
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static jmethodID mIsExported = NULL;
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jstring jstr = NULL;
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jboolean res = JNI_FALSE;
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if (mIsExported == NULL) {
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const char* sign = "(Ljava/lang/String;)Z";
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const char* name = open ? "isOpen" : "isExported";
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mIsExported = get_method(env, jlM(env), name, sign);
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}
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jstr = JNI_ENV_PTR(env)->NewStringUTF(JNI_ENV_ARG(env, pkg));
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res = JNI_ENV_PTR(env)->CallBooleanMethod(JNI_ENV_ARG(env, module),
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mIsExported, jstr);
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return res;
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}
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static
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jboolean is_exported_to(JNIEnv *env, jobject module, const char* pkg, jobject to_module,
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jboolean open) {
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static jmethodID mIsExportedTo = NULL;
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jstring jstr = NULL;
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jboolean res = JNI_FALSE;
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if (mIsExportedTo == NULL) {
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const char* sign = "(Ljava/lang/String;Ljava/lang/Module;)Z";
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const char* name = open ? "isOpen" : "isExported";
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mIsExportedTo = get_method(env, jlM(env), name, sign);
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}
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jstr = JNI_ENV_PTR(env)->NewStringUTF(JNI_ENV_ARG(env, pkg));
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res = JNI_ENV_PTR(env)->CallBooleanMethod(JNI_ENV_ARG(env, module),
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mIsExportedTo, jstr, to_module);
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return res;
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}
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static
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jvmtiError add_module_exports(jobject baseModule, const char* pkg, jobject thisModule,
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jboolean open) {
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jvmtiError err = JVMTI_ERROR_NONE;
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if (open) {
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err = (*jvmti)->AddModuleOpens(jvmti, baseModule, pkg, thisModule);
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} else {
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err = (*jvmti)->AddModuleExports(jvmti, baseModule, pkg, thisModule);
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}
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return err;
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}
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static
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jint check_add_module_exports(JNIEnv *env,
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jclass cls,
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jobject baseModule,
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jobject thisModule,
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jboolean open) {
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static char strbuf[128] = { '\0' };
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jvmtiError err = JVMTI_ERROR_NONE;
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const char* pkg = open ? "jdk.internal.math"
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: "jdk.internal.misc";
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const char* bad_pkg = "my.bad.pkg";
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const char* jvmti_fn = open ? "AddModuleOpens"
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: "AddModuleExports";
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jboolean exported = JNI_FALSE;
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// Export from NULL module
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printf("Check #N1:\n");
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err = add_module_exports(NULL, pkg, thisModule, open);
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if (err != JVMTI_ERROR_NULL_POINTER) {
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printf("#N1: jvmtiError from %s: %d\n", jvmti_fn, err);
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throw_exc(env, "Check #N1: failed to return JVMTI_ERROR_NULL_POINTER for module==NULL");
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return FAILED;
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}
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// Export NULL package
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printf("Check #N2:\n");
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err = add_module_exports(baseModule, NULL, thisModule, open);
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if (err != JVMTI_ERROR_NULL_POINTER) {
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printf("#N2: jvmtiError from %s: %d\n", jvmti_fn, err);
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throw_exc(env, "Check #N2: failed to return JVMTI_ERROR_NULL_POINTER for pkg==NULL");
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return FAILED;
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}
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// Export to NULL module
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printf("Check #N3:\n");
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err = add_module_exports(baseModule, pkg, NULL, open);
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if (err != JVMTI_ERROR_NULL_POINTER) {
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printf("#N3: jvmtiError from %s: %d\n", jvmti_fn, err);
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throw_exc(env, "Check #N3: failed to return JVMTI_ERROR_NULL_POINTER for to_module==NULL");
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return FAILED;
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}
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// Export a bad package
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printf("Check #I0:\n");
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err = add_module_exports(baseModule, bad_pkg, thisModule, open);
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if (err != JVMTI_ERROR_ILLEGAL_ARGUMENT) {
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printf("#I0: jvmtiError from %s: %d\n", jvmti_fn, err);
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throw_exc(env, "Check #I0: did not get expected JVMTI_ERROR_ILLEGAL_ARGUMENT for invalid package");
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return FAILED;
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}
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// Export from invalid module (cls)
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printf("Check #I1:\n");
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err = add_module_exports((jobject)cls, pkg, thisModule, open);
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if (err != JVMTI_ERROR_INVALID_MODULE) {
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printf("#I1: jvmtiError from %s: %d\n", jvmti_fn, err);
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throw_exc(env, "Check #I1: did not get expected JVMTI_ERROR_INVALID_MODULE for invalid module");
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return FAILED;
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}
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// Export to invalid module (cls)
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printf("Check #I2:\n");
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err = add_module_exports(baseModule, pkg, (jobject)cls, open);
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if (err != JVMTI_ERROR_INVALID_MODULE) {
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printf("#I2: jvmtiError from %s: %d\n", jvmti_fn, err);
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throw_exc(env, "Check #I2: did not get expected JVMTI_ERROR_INVALID_MODULE for invalid to_module");
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return FAILED;
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}
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// Check the pkg is not exported from baseModule to thisModule
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printf("Check #C0:\n");
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exported = is_exported_to(env, baseModule, pkg, thisModule, open);
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if (exported != JNI_FALSE) {
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snprintf(strbuf, sizeof(strbuf), "Check #C0: unexpected export of %s from base to this", pkg);
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throw_exc(env, strbuf);
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return FAILED;
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}
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// Add export of the pkg from baseModule to thisModule
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printf("Check #C1:\n");
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err = add_module_exports(baseModule, pkg, thisModule, open);
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if (err != JVMTI_ERROR_NONE) {
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printf("#C1: jvmtiError from %s: %d\n", jvmti_fn, err);
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snprintf(strbuf, sizeof(strbuf), "Check #C1: error in add export of %s from base to this", pkg);
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throw_exc(env, strbuf);
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return FAILED;
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}
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// Check the pkg is exported from baseModule to thisModule
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printf("Check #C2:\n");
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exported = is_exported_to(env, baseModule, pkg, thisModule, open);
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if (exported == JNI_FALSE) {
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snprintf(strbuf, sizeof(strbuf), "Check #C2: failed to export %s from base to this", pkg);
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throw_exc(env, strbuf);
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return FAILED;
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}
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// Check the pkg is not exported to all modules
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printf("Check #C3:\n");
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exported = is_exported(env, baseModule, pkg, open);
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if (exported != JNI_FALSE) {
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snprintf(strbuf, sizeof(strbuf), "Check #C3: unexpected export of %s from base to all modules", pkg);
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throw_exc(env, strbuf);
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return FAILED;
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}
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return PASSED;
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}
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JNIEXPORT jint JNICALL
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Java_MyPackage_AddModuleExportsAndOpensTest_check(JNIEnv *env,
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jclass cls,
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jobject baseModule,
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jobject thisModule) {
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if (jvmti == NULL) {
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throw_exc(env, "JVMTI client was not properly loaded!\n");
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return FAILED;
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}
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printf("\n*** Checks for JVMTI AddModuleExports ***\n\n");
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result = check_add_module_exports(env, cls, baseModule, thisModule, JNI_FALSE);
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if (result != PASSED) {
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return result;
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}
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printf("\n*** Checks for JVMTI AddModuleOpens ***\n\n");
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result = check_add_module_exports(env, cls, baseModule, thisModule, JNI_TRUE);
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if (result != PASSED) {
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return result;
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}
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return result;
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}
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#ifdef __cplusplus
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}
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#endif
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