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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 <stdio.h>
#include <string.h>
#include "jvmti.h"
#include "agent_common.h"
#include "JVMTITools.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 PASSED 0
#define STATUS_FAILED 2
#define ACC_PUBLIC 0x001
#define ACC_PRIVATE 0x002
#define ACC_PROTECTED 0x004
#define ACC_STATIC 0x008
#define ACC_FINAL 0x010
#define ACC_SYNCHRONIZED 0x020
#define ACC_NATIVE 0x100
#define ACC_ABSTRACT 0x400
#define ACC_STRICT 0x800
static jvmtiEnv *jvmti = NULL;
static jvmtiEventCallbacks callbacks;
static jint result = PASSED;
static jboolean printdump = JNI_FALSE;
void printModifiers(jint mod) {
if (mod & ACC_PUBLIC) printf(" PUBLIC");
if (mod & ACC_PRIVATE) printf(" PRIVATE");
if (mod & ACC_PROTECTED) printf(" PROTECTED");
if (mod & ACC_STATIC) printf(" STATIC");
if (mod & ACC_FINAL) printf(" FINAL");
if (mod & ACC_SYNCHRONIZED) printf(" SYNCHRONIZED");
if (mod & ACC_NATIVE) printf(" NATIVE");
if (mod & ACC_ABSTRACT) printf(" ABSTRACT");
if (mod & ACC_STRICT) printf(" STRICT");
printf(" (0x%0x)\n", mod);
}
void checkMeth(jvmtiEnv *jvmti_env, JNIEnv *env, jclass cl,
char *name, char *sig, int stat, int flags) {
jvmtiError err;
jmethodID mid;
jint modifiers;
if (stat) {
mid = JNI_ENV_PTR(env)->GetStaticMethodID(JNI_ENV_ARG(env, cl),
name, sig);
} else {
mid = JNI_ENV_PTR(env)->GetMethodID(JNI_ENV_ARG(env, cl), name, sig);
}
if (mid == NULL) {
printf("Cannot find MethodID for \"%s%s\"\n", name, sig);
result = STATUS_FAILED;
return;
}
err = (*jvmti_env)->GetMethodModifiers(jvmti_env, mid, &modifiers);
if (err != JVMTI_ERROR_NONE) {
printf("\"%s%s\"\n", name, sig);
printf("(GetClassModifiers) unexpected error: %s (%d)\n",
TranslateError(err), err);
result = STATUS_FAILED;
return;
}
if (printdump == JNI_TRUE) {
printf(">>> %s%s" , name, sig);
printModifiers(modifiers);
}
if (modifiers != flags) {
printf("\"%s%s\" access flags expected:", name, sig);
printModifiers(flags);
printf("\t actual:");
printModifiers(modifiers);
result = STATUS_FAILED;
}
}
void JNICALL
ClassLoad(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thr, jclass cls) {
jvmtiError err;
char *sig, *generic;
err = (*jvmti_env)->GetClassSignature(jvmti_env, cls, &sig, &generic);
if (err != JVMTI_ERROR_NONE) {
printf("(GetClassSignature) unexpected error: %s (%d)\n",
TranslateError(err), err);
return;
}
if (strcmp(sig, "Lnsk/jvmti/GetMethodModifiers/methmod001;") == 0) {
checkMeth(jvmti_env, (JNIEnv *)env, cls,
"run", "([Ljava/lang/String;Ljava/io/PrintStream;)I",
1, ACC_PUBLIC | ACC_STATIC);
checkMeth(jvmti_env, (JNIEnv *)env, cls,
"meth_stat", "(ILjava/lang/String;)[F",
1, ACC_PROTECTED | ACC_STATIC | ACC_FINAL);
}
}
#ifdef STATIC_BUILD
JNIEXPORT jint JNICALL Agent_OnLoad_methmod001(JavaVM *jvm, char *options, void *reserved) {
return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNICALL Agent_OnAttach_methmod001(JavaVM *jvm, char *options, void *reserved) {
return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNI_OnLoad_methmod001(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, "printdump") == 0) {
printdump = JNI_TRUE;
}
res = JNI_ENV_PTR(jvm)->GetEnv(JNI_ENV_ARG(jvm, (void **) &jvmti),
JVMTI_VERSION_1_1);
if (res != JNI_OK || jvmti == NULL) {
printf("Wrong result of a valid call to GetEnv!\n");
return JNI_ERR;
}
callbacks.ClassLoad = &ClassLoad;
err = (*jvmti)->SetEventCallbacks(jvmti, &callbacks, sizeof(callbacks));
if (err != JVMTI_ERROR_NONE) {
printf("(SetEventCallbacks) unexpected error: %s (%d)\n",
TranslateError(err), err);
return JNI_ERR;
}
err = (*jvmti)->SetEventNotificationMode(jvmti, JVMTI_ENABLE,
JVMTI_EVENT_CLASS_LOAD, NULL);
if (err != JVMTI_ERROR_NONE) {
printf("Failed to enable event JVMTI_EVENT_CLASS_LOAD: %s (%d)\n",
TranslateError(err), err);
return JNI_ERR;
}
return JNI_OK;
}
JNIEXPORT jint JNICALL Java_nsk_jvmti_GetMethodModifiers_methmod001_check(JNIEnv *env, jclass cls) {
jclass clsId;
checkMeth(jvmti, env, cls, "<init>", "()V", 0, ACC_PUBLIC);
checkMeth(jvmti, env, cls, "meth_1", "(C)C", 0, ACC_PRIVATE);
checkMeth(jvmti, env, cls, "meth_2", "(FF)F", 0, ACC_STRICT);
checkMeth(jvmti, env, cls, "check", "()I", 1, ACC_NATIVE | ACC_STATIC);
clsId = JNI_ENV_PTR(env)->FindClass(JNI_ENV_ARG(env,
"nsk/jvmti/GetMethodModifiers/methmod001a"));
checkMeth(jvmti, env, clsId, "meth_new",
"()Lnsk/jvmti/GetMethodModifiers/methmod001;", 0, ACC_SYNCHRONIZED);
checkMeth(jvmti, env, clsId, "meth_abs", "()V", 0, ACC_ABSTRACT);
clsId = JNI_ENV_PTR(env)->FindClass(JNI_ENV_ARG(env,
"nsk/jvmti/GetMethodModifiers/methmod001$Inn"));
checkMeth(jvmti, env, clsId, "meth_inn", "(Ljava/lang/String;)V",
0, ACC_PUBLIC | ACC_SYNCHRONIZED | ACC_FINAL);
return result;
}
#ifdef __cplusplus
}
#endif
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