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/*
* 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 <stdlib.h>
#include <string.h>
#include "jni_tools.h"
#include "agent_common.h"
#include "jvmti_tools.h"
extern "C" {
#define STATUS_FAILED 2
#define PASSED 0
/* tested method */
static const char *METHOD[] = {
"nativeMethod", "()V"
};
/* counter for the original method calls */
static volatile int origCalls = 0;
/* counter for the redirected method calls */
static volatile int redirCalls = 0;
static volatile jint result = PASSED;
static jvmtiEnv *jvmti = NULL;
static jvmtiEventCallbacks callbacks;
static jrawMonitorID countLock;
/* method to be redirected used to check the native method redirection
through the NativeMethodBind event */
JNIEXPORT void JNICALL
Java_nsk_jvmti_NativeMethodBind_nativemethbind004_nativeMethod(
JNIEnv *env, jobject obj) {
origCalls++;
NSK_DISPLAY1("inside the nativeMethod(): calls=%d\n",
origCalls);
}
/* redirected method used to check the native method redirection
through the NativeMethodBind event */
static void JNICALL
redirNativeMethod(JNIEnv *env, jobject obj) {
redirCalls++;
NSK_DISPLAY1("inside the redirNativeMethod(): calls=%d\n",
redirCalls);
}
static void lock(jvmtiEnv *jvmti_env, JNIEnv *jni_env) {
if (!NSK_JVMTI_VERIFY(jvmti_env->RawMonitorEnter(countLock)))
jni_env->FatalError("failed to enter a raw monitor\n");
}
static void unlock(jvmtiEnv *jvmti_env, JNIEnv *jni_env) {
if (!NSK_JVMTI_VERIFY(jvmti_env->RawMonitorExit(countLock)))
jni_env->FatalError("failed to exit a raw monitor\n");
}
/** callback functions **/
void JNICALL
NativeMethodBind(jvmtiEnv *jvmti_env, JNIEnv* jni_env, jthread thread,
jmethodID method, void *addr, void **new_addr) {
jvmtiPhase phase;
char *methNam, *methSig;
lock(jvmti_env, jni_env);
NSK_DISPLAY0(">>>> NativeMethodBind event received\n");
if (!NSK_JVMTI_VERIFY(jvmti_env->GetPhase(&phase))) {
result = STATUS_FAILED;
unlock(jvmti_env, jni_env);
return;
}
if (phase != JVMTI_PHASE_LIVE && phase != JVMTI_PHASE_START) {
unlock(jvmti_env, jni_env);
return;
}
if (!NSK_JVMTI_VERIFY(jvmti_env->GetMethodName(method, &methNam, &methSig, NULL))) {
result = STATUS_FAILED;
NSK_COMPLAIN0("TEST FAILED: unable to get method name during NativeMethodBind callback\n\n");
unlock(jvmti_env, jni_env);
return;
}
if ((strcmp(methNam,METHOD[0]) == 0) &&
(strcmp(methSig,METHOD[1]) == 0)) {
NSK_DISPLAY4("\tmethod: \"%s %s\"\nRedirecting the method address from 0x%p to 0x%p ...\n",
methNam, methSig, addr, (void*) redirNativeMethod);
*new_addr = (void*) redirNativeMethod;
}
if (!NSK_JVMTI_VERIFY(jvmti_env->Deallocate((unsigned char*) methNam))) {
result = STATUS_FAILED;
NSK_COMPLAIN0("TEST FAILED: unable to deallocate memory storing method name\n\n");
}
if (!NSK_JVMTI_VERIFY(jvmti_env->Deallocate((unsigned char*) methSig))) {
result = STATUS_FAILED;
NSK_COMPLAIN0("TEST FAILED: unable to deallocate memory storing method signature\n\n");
}
NSK_DISPLAY0("<<<<\n\n");
unlock(jvmti_env, jni_env);
}
/************************/
JNIEXPORT jint JNICALL
Java_nsk_jvmti_NativeMethodBind_nativemethbind004_check(
JNIEnv *env, jobject obj) {
if (origCalls == 0) {
NSK_DISPLAY0(
"CHECK PASSED: original nativeMethod() to be redirected\n"
"\thas not been invoked as expected\n");
} else {
result = STATUS_FAILED;
NSK_COMPLAIN1(
"TEST FAILED: nativeMethod() has not been redirected by the NativeMethodBind:\n"
"\t%d calls\texpected: 0\n\n",
origCalls);
}
if (redirCalls == 1) {
NSK_DISPLAY1(
"CHECK PASSED: nativeMethod() has been redirected by the NativeMethodBind:\n"
"\t%d calls of redirected method as expected\n",
redirCalls);
} else {
result = STATUS_FAILED;
NSK_COMPLAIN1(
"TEST FAILED: nativeMethod() has not been redirected by the NativeMethodBind:\n"
"\t%d calls of redirected method\texpected: 1\n\n",
redirCalls);
}
return result;
}
#ifdef STATIC_BUILD
JNIEXPORT jint JNICALL Agent_OnLoad_nativemethbind004(JavaVM *jvm, char *options, void *reserved) {
return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNICALL Agent_OnAttach_nativemethbind004(JavaVM *jvm, char *options, void *reserved) {
return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNI_OnLoad_nativemethbind004(JavaVM *jvm, char *options, void *reserved) {
return JNI_VERSION_1_8;
}
#endif
jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
jvmtiCapabilities caps;
/* init framework and parse options */
if (!NSK_VERIFY(nsk_jvmti_parseOptions(options)))
return JNI_ERR;
/* create JVMTI environment */
if (!NSK_VERIFY((jvmti =
nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL))
return JNI_ERR;
/* create a raw monitor */
if (!NSK_JVMTI_VERIFY(jvmti->CreateRawMonitor("_counter_lock", &countLock)))
return JNI_ERR;
/* add capability to generate compiled method events */
memset(&caps, 0, sizeof(jvmtiCapabilities));
caps.can_generate_native_method_bind_events = 1;
if (!NSK_JVMTI_VERIFY(jvmti->AddCapabilities(&caps)))
return JNI_ERR;
if (!NSK_JVMTI_VERIFY(jvmti->GetCapabilities(&caps)))
return JNI_ERR;
if (!caps.can_generate_native_method_bind_events)
NSK_DISPLAY0("Warning: generation of native method bind events is not implemented\n");
/* set event callback */
NSK_DISPLAY0("setting event callbacks ...\n");
(void) memset(&callbacks, 0, sizeof(callbacks));
callbacks.NativeMethodBind = &NativeMethodBind;
if (!NSK_JVMTI_VERIFY(jvmti->SetEventCallbacks(&callbacks, sizeof(callbacks))))
return JNI_ERR;
NSK_DISPLAY0("setting event callbacks done\nenabling JVMTI events ...\n");
if (!NSK_JVMTI_VERIFY(jvmti->SetEventNotificationMode(JVMTI_ENABLE,
JVMTI_EVENT_NATIVE_METHOD_BIND,
NULL)))
return JNI_ERR;
NSK_DISPLAY0("enabling the events done\n\n");
return JNI_OK;
}
}
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