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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
static jvmtiEnv *jvmti = NULL;
static jvmtiCapabilities caps;
static jint result = PASSED;
static jboolean printdump = JNI_FALSE;
#ifdef STATIC_BUILD
JNIEXPORT jint JNICALL Agent_OnLoad_bytecodes002(JavaVM *jvm, char *options, void *reserved) {
return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNICALL Agent_OnAttach_bytecodes002(JavaVM *jvm, char *options, void *reserved) {
return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNI_OnLoad_bytecodes002(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;
}
if ((err = ((*jvmti)->GetCapabilities(jvmti, &caps))) != JVMTI_ERROR_NONE) {
printf("(GetCapabilities) unexpected error: %s (%d)\n",
TranslateError(err), err);
return JNI_ERR;
}
err = (*jvmti)->GetPotentialCapabilities(jvmti, &caps);
if (err != JVMTI_ERROR_NONE) {
printf("(GetPotentialCapabilities) unexpected error: %s (%d)\n",
TranslateError(err), err);
return JNI_ERR;
}
err = (*jvmti)->AddCapabilities(jvmti, &caps);
if (err != JVMTI_ERROR_NONE) {
printf("(AddCapabilities) unexpected error: %s (%d)\n",
TranslateError(err), err);
return JNI_ERR;
}
err = (*jvmti)->GetCapabilities(jvmti, &caps);
if (err != JVMTI_ERROR_NONE) {
printf("(GetCapabilities) unexpected error: %s (%d)\n",
TranslateError(err), err);
return JNI_ERR;
}
if (!caps.can_get_bytecodes) {
printf("Warning: GetBytecodes is not implemented\n");
}
return JNI_OK;
}
JNIEXPORT jint JNICALL
Java_nsk_jvmti_GetBytecodes_bytecodes002_check(JNIEnv *env, jclass cls) {
jvmtiError err;
jmethodID mid;
jint bytecodeCount;
unsigned char *bytecodes;
if (jvmti == NULL) {
printf("JVMTI client was not properly loaded!\n");
return STATUS_FAILED;
}
mid = JNI_ENV_PTR(env)->GetMethodID(JNI_ENV_ARG(env, cls),
"<init>", "()V");
if (mid == NULL) {
printf("Cannot get method ID for \"<init>\"!\n");
return STATUS_FAILED;
}
if (printdump == JNI_TRUE) {
printf(">>> invalid method check ...\n");
}
err = (*jvmti)->GetBytecodes(jvmti, NULL, &bytecodeCount, &bytecodes);
if (err == JVMTI_ERROR_MUST_POSSESS_CAPABILITY && !caps.can_get_bytecodes) {
/* It is OK */
} else if (err != JVMTI_ERROR_INVALID_METHODID) {
printf("Error expected: JVMTI_ERROR_INVALID_METHODID,\n");
printf("\tactual: %s (%d)\n", TranslateError(err), err);
result = STATUS_FAILED;
}
if (printdump == JNI_TRUE) {
printf(">>> (bytecodeCountPtr) null pointer check ...\n");
}
err = (*jvmti)->GetBytecodes(jvmti, mid, NULL, &bytecodes);
if (err == JVMTI_ERROR_MUST_POSSESS_CAPABILITY && !caps.can_get_bytecodes) {
/* It is OK */
} else if (err != JVMTI_ERROR_NULL_POINTER) {
printf("Error expected: JVMTI_ERROR_NULL_POINTER,\n");
printf("\tactual: %s (%d)\n", TranslateError(err), err);
result = STATUS_FAILED;
}
if (printdump == JNI_TRUE) {
printf(">>> (bytecodesPtr) null pointer check ...\n");
}
err = (*jvmti)->GetBytecodes(jvmti, mid, &bytecodeCount, NULL);
if (err == JVMTI_ERROR_MUST_POSSESS_CAPABILITY && !caps.can_get_bytecodes) {
/* It is OK */
} else if (err != JVMTI_ERROR_NULL_POINTER) {
printf("Error expected: JVMTI_ERROR_NULL_POINTER,\n");
printf("\tactual: %s (%d)\n", TranslateError(err), err);
result = STATUS_FAILED;
}
mid = JNI_ENV_PTR(env)->GetStaticMethodID(JNI_ENV_ARG(env, cls),
"check", "()I");
if (mid == NULL) {
printf("Cannot get method ID for \"check\"!\n");
return STATUS_FAILED;
}
if (printdump == JNI_TRUE) {
printf(">>> native method check ...\n");
}
err = (*jvmti)->GetBytecodes(jvmti, mid, &bytecodeCount, &bytecodes);
if (err != JVMTI_ERROR_NATIVE_METHOD) {
printf("Error expected: JVMTI_ERROR_NATIVE_METHOD,\n");
printf("\tactual: %s (%d)\n", TranslateError(err), err);
result = STATUS_FAILED;
}
if (printdump == JNI_TRUE) {
printf(">>> ... done\n");
}
return result;
}
#ifdef __cplusplus
}
#endif
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