270 lines
8.8 KiB
C
270 lines
8.8 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 can_module_read(JNIEnv *env, jobject module, jobject to_module) {
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static jmethodID mCanRead = NULL;
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jboolean res = JNI_FALSE;
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if (mCanRead == NULL) {
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const char* sign = "(Ljava/lang/Module;)Z";
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mCanRead = get_method(env, jlM(env), "canRead", sign);
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}
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res = JNI_ENV_PTR(env)->CallBooleanMethod(JNI_ENV_ARG(env, module),
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mCanRead, to_module);
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return res;
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}
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static
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jint check_add_module_reads(JNIEnv *env,
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jclass cls,
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jobject unnamedModule,
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jobject baseModule,
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jobject instrModule) {
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jvmtiError err = JVMTI_ERROR_NONE;
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jboolean can = JNI_FALSE;
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// Add an invalid read edge from NULL module
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printf("Check #N1:\n");
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err = (*jvmti)->AddModuleReads(jvmti, NULL, baseModule);
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if (err != JVMTI_ERROR_NULL_POINTER) {
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printf("#N1: jvmtiError from AddModuleReads: %d\n", 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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// Add an invalid read edge to NULL module
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printf("Check #N2:\n");
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err = (*jvmti)->AddModuleReads(jvmti, baseModule, NULL);
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if (err != JVMTI_ERROR_NULL_POINTER) {
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printf("#N2: jvmtiError from AddModuleReads: %d\n", err);
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throw_exc(env, "Check #N2: 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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// Add an invalid read edge from invalid module (cls)
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printf("Check #I1:\n");
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err = (*jvmti)->AddModuleReads(jvmti, cls, baseModule);
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if (err != JVMTI_ERROR_INVALID_MODULE) {
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printf("#I1: jvmtiError from AddModuleReads: %d\n", err);
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throw_exc(env, "Check #I1: failed to return JVMTI_ERROR_INVALID_MODULE for module==cls");
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return FAILED;
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}
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// Add an invalid read edge to invalid module (cls)
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printf("Check #I2:\n");
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err = (*jvmti)->AddModuleReads(jvmti, baseModule, cls);
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if (err != JVMTI_ERROR_INVALID_MODULE) {
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printf("#I2: jvmtiError from AddModuleReads: %d\n", err);
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throw_exc(env, "Check #I2: failed to return JVMTI_ERROR_INVALID_MODULE for to_module==cls");
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return FAILED;
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}
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// Check the edge baseModule->instrModule is absent
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printf("Check #C0:\n");
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can = can_module_read(env, baseModule, instrModule);
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if (can != JNI_FALSE) {
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throw_exc(env, "Check #C0: read edge from base to instr is unexpected");
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return FAILED;
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}
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// Add read edge baseModule->instrModule
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printf("Check #C1:\n");
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err = (*jvmti)->AddModuleReads(jvmti, baseModule, instrModule);
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if (err != JVMTI_ERROR_NONE) {
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printf("#C1: jvmtiError from AddModuleReads: %d\n", err);
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throw_exc(env, "Check #C1: error in add reads from base to instr");
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return FAILED;
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}
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// Check the read edge baseModule->instrModule is present now
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printf("Check #C2:\n");
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can = can_module_read(env, baseModule, instrModule);
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if (can == JNI_FALSE) {
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throw_exc(env, "Check #C2: failed to add reads from base to instr");
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return FAILED;
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}
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// Check the read edge baseModule->unnamedModule is absent
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printf("Check #C3:\n");
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can = can_module_read(env, baseModule, unnamedModule);
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if (can != JNI_FALSE) {
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throw_exc(env, "Check #C3: got unexpected read edge from base to unnamed");
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return FAILED;
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}
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// Add read edge baseModule->unnamedModule
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printf("Check #C4:\n");
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err = (*jvmti)->AddModuleReads(jvmti, baseModule, unnamedModule);
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if (err != JVMTI_ERROR_NONE) {
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printf("#C4: jvmtiError from AddModuleReads: %d\n", err);
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throw_exc(env, "Check #C4: failed to ignore adding read edge from base to unnamed");
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return FAILED;
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}
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// Check the read edge baseModule->unnamedModule is present now
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printf("Check #C5:\n");
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can = can_module_read(env, baseModule, unnamedModule);
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if (can == JNI_FALSE) {
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throw_exc(env, "Check #C5: did not get expected read edge from base to unnamed");
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return FAILED;
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}
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// Check the read edge unnamedModule->instrModule is absent
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printf("Check #C6:\n");
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can = can_module_read(env, unnamedModule, instrModule);
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if (can == JNI_FALSE) {
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throw_exc(env, "Check #C6: did not get expected read edge from unnamed to instr");
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return FAILED;
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}
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// Add read edge unnamedModule->instrModule
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printf("Check #C7:\n");
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err = (*jvmti)->AddModuleReads(jvmti, unnamedModule, instrModule);
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if (err != JVMTI_ERROR_NONE) {
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printf("#C7: jvmtiError from AddModuleReads: %d\n", err);
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throw_exc(env, "Check #C7: failed to ignore adding read edge from unnamed to instr");
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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_AddModuleReadsTest_check(JNIEnv *env,
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jclass cls,
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jobject unnamedModule,
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jobject baseModule,
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jobject instrModule) {
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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 AddModuleReads ***\n\n");
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result = check_add_module_reads(env, cls, unnamedModule, baseModule, instrModule);
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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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