| /* |
| * Copyright (c) 2003, 2018, 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 <stdarg.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include <jvmti.h> |
| #include "agent_common.h" |
| |
| #include "JVMTITools.h" |
| #include "native_thread.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 |
| |
| #ifndef JNI_ENV_ARG1 |
| #ifdef __cplusplus |
| #define JNI_ENV_ARG1(x) |
| #else |
| #define JNI_ENV_ARG1(x) x |
| #endif |
| #endif |
| |
| #define PASSED 0 |
| #define STATUS_FAILED 2 |
| |
| #define TRIES 30 |
| #define MAX_THREADS 5 |
| |
| static const char *javaField = "_setjniftab001a"; |
| static const char *classSig = |
| "Lnsk/jvmti/SetJNIFunctionTable/setjniftab001a;"; |
| |
| static JavaVM *vm; |
| static jvmtiEnv *jvmti = NULL; |
| |
| static volatile int verbose = 0; |
| |
| static volatile jint result = PASSED; |
| static volatile int thrStarted[MAX_THREADS]; |
| static void *waitThr[MAX_THREADS]; |
| static int waitContElem[MAX_THREADS]; /* context of a particular waiting thread */ |
| |
| static volatile jobject clsObj; |
| static jrawMonitorID countLock; |
| |
| /* the original JNI function table */ |
| static jniNativeInterface *orig_jni_functions = NULL; |
| |
| /* the redirected JNI function table */ |
| static jniNativeInterface *redir_jni_functions = NULL; |
| |
| /* number of the redirected JNI function calls */ |
| static volatile int monent_calls = 0; |
| |
| static void lock() { |
| jvmtiError err; |
| |
| if ((err = (*jvmti)->RawMonitorEnter(jvmti, countLock)) != |
| JVMTI_ERROR_NONE) { |
| printf("(%s,%d): TEST FAILURE: RawMonitorEnter returns unexpected error: %s\n", |
| __FILE__, __LINE__, TranslateError(err)); |
| exit(STATUS_FAILED); |
| } |
| } |
| |
| static void unlock() { |
| jvmtiError err; |
| |
| if ((err = (*jvmti)->RawMonitorExit(jvmti, countLock)) |
| != JVMTI_ERROR_NONE) { |
| printf("(%s,%d): TEST FAILURE: RawMonitorExit returns unexpected error: %s\n", |
| __FILE__, __LINE__, TranslateError(err)); |
| exit(STATUS_FAILED); |
| } |
| } |
| |
| /** redirected JNI functions **/ |
| jint JNICALL MyMonitorEnter(JNIEnv *env, jobject obj) { |
| lock(); |
| |
| monent_calls++; |
| if (verbose) |
| printf("\nMyMonitorEnter: the function called successfully: number of calls=%d\n", |
| monent_calls); |
| |
| unlock(); |
| |
| return orig_jni_functions->MonitorEnter( |
| JNI_ENV_ARG(env, obj)); |
| } |
| /*****************************/ |
| |
| /* zeroing the interception counter */ |
| void zeroCounter() { |
| lock(); |
| monent_calls = 0; |
| unlock(); |
| } |
| |
| void doRedirect(JNIEnv *env) { |
| jvmtiError err; |
| |
| if (verbose) |
| printf("\ndoRedirect: obtaining the JNI function table ...\n"); |
| if ((err = (*jvmti)->GetJNIFunctionTable(jvmti, &orig_jni_functions)) != |
| JVMTI_ERROR_NONE) { |
| result = STATUS_FAILED; |
| printf("(%s,%d): TEST FAILED: failed to get original JNI function table: %s\n", |
| __FILE__, __LINE__, TranslateError(err)); |
| JNI_ENV_PTR(env)->FatalError(JNI_ENV_ARG(env, |
| "failed to get original JNI function table")); |
| } |
| if ((err = (*jvmti)->GetJNIFunctionTable(jvmti, &redir_jni_functions)) != |
| JVMTI_ERROR_NONE) { |
| result = STATUS_FAILED; |
| printf("(%s,%d): TEST FAILED: failed to get redirected JNI function table: %s\n", |
| __FILE__, __LINE__, TranslateError(err)); |
| JNI_ENV_PTR(env)->FatalError(JNI_ENV_ARG(env, |
| "failed to get redirected JNI function table")); |
| } |
| if (verbose) |
| printf("doRedirect: the JNI function table obtained successfully\n"); |
| |
| if (verbose) |
| printf("\ndoRedirect: overwriting the function MonitorEnter ...\n"); |
| redir_jni_functions->MonitorEnter = MyMonitorEnter; |
| |
| if ((err = (*jvmti)->SetJNIFunctionTable(jvmti, redir_jni_functions)) != |
| JVMTI_ERROR_NONE) { |
| result = STATUS_FAILED; |
| printf("(%s,%d): TEST FAILED: failed to set new JNI function table: %s\n", |
| __FILE__, __LINE__, TranslateError(err)); |
| JNI_ENV_PTR(env)->FatalError(JNI_ENV_ARG(env, |
| "failed to set new JNI function table")); |
| } |
| |
| if (verbose) |
| printf("\ndoRedirect: the functions are overwritten successfully\n"); |
| } |
| |
| void doRestore(JNIEnv *env) { |
| jvmtiError err; |
| |
| if (verbose) |
| printf("\ndoRestore: restoring the original JNI function table ...\n"); |
| if ((err = (*jvmti)->SetJNIFunctionTable(jvmti, orig_jni_functions)) != |
| JVMTI_ERROR_NONE) { |
| result = STATUS_FAILED; |
| printf("(%s,%d): TEST FAILED: failed to restore original JNI function table: %s\n", |
| __FILE__, __LINE__, TranslateError(err)); |
| JNI_ENV_PTR(env)->FatalError(JNI_ENV_ARG(env, |
| "failed to restore original JNI function table")); |
| } |
| if (verbose) |
| printf("doRestore: the original JNI function table is restored successfully\n"); |
| } |
| |
| void doExec(JNIEnv *env, int thrNum) { |
| jint res; |
| |
| if ((res = JNI_ENV_PTR(env)-> |
| MonitorEnter(JNI_ENV_ARG(env, clsObj))) != 0) { |
| result = STATUS_FAILED; |
| printf("(%s,%d): TEST FAILURE: MonitorEnter() returns %d for thread #%d\n", |
| __FILE__, __LINE__, res, thrNum); |
| } |
| if (JNI_ENV_PTR(env)->ExceptionOccurred(JNI_ENV_ARG1(env))) { |
| result = STATUS_FAILED; |
| printf("(%s,%d): TEST FAILURE: exception occured for thread #%d\n", |
| __FILE__, __LINE__, thrNum); |
| JNI_ENV_PTR(env)->ExceptionDescribe(JNI_ENV_ARG1(env)); |
| JNI_ENV_PTR(env)->ExceptionClear(JNI_ENV_ARG1(env)); |
| } |
| if (verbose) |
| printf("\ndoExec: thread #%d entered the monitor\n", |
| thrNum); |
| if ((res = JNI_ENV_PTR(env)-> |
| MonitorExit(JNI_ENV_ARG(env, clsObj))) != 0) { |
| result = STATUS_FAILED; |
| printf("(%s,%d): TEST FAILURE: MonitorExit() returns %d for thread #%d\n", |
| __FILE__, __LINE__, res, thrNum); |
| } |
| if (verbose) |
| printf("doExec: thread #%d exited the monitor\n", |
| thrNum); |
| } |
| |
| void checkCall(int step, int exMonEntCalls, const char *msg) { |
| if (monent_calls == exMonEntCalls) { |
| if (verbose) |
| printf("\nCHECK PASSED: the %s JNI function MonitorEnter() has been %s inside %s:\n\t%d intercepted call(s) as expected\n", |
| (step==1)?"tested":"original", |
| (step==1)?"redirected":"restored", msg, |
| monent_calls); |
| } |
| else { |
| result = STATUS_FAILED; |
| printf("\nTEST FAILED: the %s JNI function MonitorEnter() has not been %s inside %s:\n\t%d intercepted call(s) instead of %d as expected\n", |
| (step==1)?"tested":"original", |
| (step==1)?"redirected":"restored", msg, |
| monent_calls, exMonEntCalls); |
| } |
| } |
| |
| /* thread procedures */ |
| static int waitingThread(void *context) { |
| JNIEnv *env; |
| int exitCode = PASSED; |
| jint res; |
| int tries = 0; |
| int indx = *((int *) context); |
| |
| if (verbose) |
| printf("\nwaitingThread: thread #%d started\n\tattaching the thread to the VM ...\n", |
| indx); |
| if ((res = |
| JNI_ENV_PTR(vm)->AttachCurrentThread( |
| JNI_ENV_ARG(vm, (void **) &env), (void *) 0)) != 0) { |
| printf("(%s,%d): TEST FAILURE: waitingThread: AttachCurrentThread() returns: %d\n", |
| __FILE__, __LINE__, res); |
| return STATUS_FAILED; |
| } |
| |
| thrStarted[indx-1] = 1; |
| |
| doExec(env, indx); |
| |
| if ((res = |
| JNI_ENV_PTR(vm)->DetachCurrentThread( |
| JNI_ENV_ARG1(vm))) != 0) { |
| printf("(%s,%d): TEST FAILURE: waitingThread: DetachCurrentThread() returns: %d\n", |
| __FILE__, __LINE__, res); |
| return STATUS_FAILED; |
| } |
| if (verbose) |
| printf("waitingThread: the thread #%d exits with %d\n", |
| indx, exitCode); |
| return exitCode; |
| } |
| /*********************/ |
| |
| static jobject getObjectFromField(JNIEnv *env, jobject obj) { |
| jfieldID fid; |
| jclass _objCls; |
| |
| _objCls = JNI_ENV_PTR(env)->GetObjectClass(JNI_ENV_ARG(env, obj)); |
| |
| if (verbose) |
| printf("\ngetObjectFromField: obtaining field ID for name=\"%s\" signature=\"%s\"...\n", |
| javaField, classSig); |
| if ((fid = JNI_ENV_PTR(env)->GetFieldID( |
| JNI_ENV_ARG(env, _objCls), javaField, classSig)) == 0) { |
| result = STATUS_FAILED; |
| printf("(%s,%d): TEST FAILURE: failed to get ID for the field \"%s\"\n", |
| __FILE__, __LINE__, javaField); |
| JNI_ENV_PTR(env)->FatalError(JNI_ENV_ARG(env, |
| "failed to get ID for the java field")); |
| } |
| |
| return JNI_ENV_PTR(env)->GetObjectField( |
| JNI_ENV_ARG(env, obj), fid); |
| } |
| |
| void startThreads() { |
| int i; |
| int tries = 0; |
| |
| for (i=0; i<MAX_THREADS; i++) { |
| if (verbose) |
| printf("\nstarting waiting thread #%d ...\n", |
| i+1); |
| thrStarted[i] = 0; |
| waitContElem[i] = i+1; |
| waitThr[i] = THREAD_new(waitingThread, &waitContElem[i]); |
| if (THREAD_start(waitThr[i]) == NULL) { |
| printf("TEST FAILURE: cannot start waiting thread #%d\n", |
| i+1); |
| result = STATUS_FAILED; |
| } |
| |
| do { |
| THREAD_sleep(1); |
| tries++; |
| if (tries > TRIES) { |
| printf("TEST FAILURE: waiting thread #%d is still not started\n", |
| i+1); |
| result = STATUS_FAILED; |
| } |
| } while(thrStarted[i] != 1); |
| if (verbose) |
| printf("\nthe waiting thread #%d started\n", |
| i+1); |
| } |
| } |
| |
| void waitThreads() { |
| int i; |
| |
| for (i=0; i<MAX_THREADS; i++) { |
| if (verbose) |
| printf("\nwaiting for the thread #%d...\n", |
| i+1); |
| THREAD_waitFor(waitThr[i]); |
| if (THREAD_status(waitThr[i]) != PASSED) { |
| result = STATUS_FAILED; |
| printf("TEST FAILED: the waiting thread #%d done with the error code %d\n", |
| i+1, THREAD_status(waitThr[i])); |
| } |
| else if (verbose) |
| printf("the thread #%d done with the code %d\n", |
| i+1, THREAD_status(waitThr[i])); |
| free(waitThr[i]); |
| } |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_nsk_jvmti_SetJNIFunctionTable_setjniftab001_check(JNIEnv *env, jobject obj) { |
| int exitCode = PASSED; |
| jint res; |
| JNIEnv *nextEnv = NULL; /* JNI env used to verify the assertion */ |
| |
| if (jvmti == NULL) { |
| printf("(%s,%d): TEST FAILURE: JVMTI client was not properly loaded\n", |
| __FILE__, __LINE__); |
| return STATUS_FAILED; |
| } |
| |
| if ((clsObj = JNI_ENV_PTR(env)->NewGlobalRef( |
| JNI_ENV_ARG(env, getObjectFromField(env, obj)))) == NULL) { |
| printf("(%s,%d): TEST FAILURE: cannot create a new global reference of class \"%s\"\n", |
| __FILE__, __LINE__, classSig); |
| JNI_ENV_PTR(env)->FatalError(JNI_ENV_ARG(env, |
| "failed to create a new global reference")); |
| } |
| |
| doRedirect(env); |
| |
| /* 1: check the assertion inside current thread and new threads */ |
| if (verbose) |
| printf("\na) Checking the assertion inside current thread and new threads ...\n"); |
| doExec(env, 0); |
| checkCall(1, 1, "main thread"); |
| |
| zeroCounter(); |
| startThreads(); |
| waitThreads(); |
| checkCall(1, MAX_THREADS, "new threads"); |
| |
| /* 2: detach current thread then the attach it again and check the assertion |
| Note: the JNI spec says that the main thread can be detached from the VM |
| only since JDK 1.2 */ |
| if (verbose) |
| printf("\nb) Checking the assertion inside main thread detached and attached again ...\n\ndetaching the main thread ...\n"); |
| |
| if ((res = |
| JNI_ENV_PTR(vm)->DetachCurrentThread( |
| JNI_ENV_ARG1(vm))) != 0) |
| printf("(%s,%d): Warning: DetachCurrentThread() returns: %d\n\ |
| \tcheck with the detached main thread skipped\n", |
| __FILE__, __LINE__, res); |
| else { |
| if (verbose) |
| printf("\nattaching the main thread again ...\n"); |
| if ((res = |
| JNI_ENV_PTR(vm)->AttachCurrentThread( |
| JNI_ENV_ARG(vm, (void **) &nextEnv), (void *) 0)) != 0) { |
| printf("(%s,%d): TEST FAILURE: waitingThread: AttachCurrentThread() returns: %d\n", |
| __FILE__, __LINE__, res); |
| return STATUS_FAILED; |
| } |
| |
| zeroCounter(); |
| doExec(nextEnv, 0); |
| checkCall(1, 1, "main thread with new JNI env"); |
| } |
| |
| /* 3: restore the function, zeroing the interception counter |
| and check the assertion with current thread and new threads */ |
| if (verbose) |
| printf("\nc) Checking the restored JNI function table ...\n"); |
| doRestore((nextEnv==NULL)? env:nextEnv); |
| |
| zeroCounter(); |
| doExec((nextEnv==NULL)? env:nextEnv, 0); |
| checkCall(2, 0, "main thread"); |
| |
| zeroCounter(); |
| startThreads(); |
| waitThreads(); |
| checkCall(2, 0, "new threads"); |
| |
| JNI_ENV_PTR(env)->DeleteGlobalRef(JNI_ENV_ARG((nextEnv==NULL)? env:nextEnv, clsObj)); |
| |
| return result; |
| } |
| |
| #ifdef STATIC_BUILD |
| JNIEXPORT jint JNICALL Agent_OnLoad_setjniftab001(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNICALL Agent_OnAttach_setjniftab001(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNI_OnLoad_setjniftab001(JavaVM *jvm, char *options, void *reserved) { |
| return JNI_VERSION_1_8; |
| } |
| #endif |
| jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) { |
| jint res; |
| jvmtiError err; |
| |
| if (options != NULL && strcmp(options, "-verbose") == 0) |
| verbose = 1; |
| |
| if (verbose) |
| printf("verbose mode on\n"); |
| |
| res = JNI_ENV_PTR(jvm)-> |
| GetEnv(JNI_ENV_ARG(jvm, (void **) &jvmti), JVMTI_VERSION_1_1); |
| if (res != JNI_OK || jvmti == NULL) { |
| printf("(%s,%d): Failed to call GetEnv\n", __FILE__, __LINE__); |
| return JNI_ERR; |
| } |
| |
| vm = jvm; |
| |
| if ((err = (*jvmti)->CreateRawMonitor(jvmti, "_counter_lock", |
| &countLock)) != JVMTI_ERROR_NONE) { |
| printf("(%s,%d): TEST FAILURE: CreateRawMonitor() returns unexpected error: %s\n", |
| __FILE__, __LINE__, TranslateError(err)); |
| return JNI_ERR; |
| } |
| |
| return JNI_OK; |
| } |
| |
| #ifdef __cplusplus |
| } |
| #endif |
