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/*
* Copyright (c) 2003, 2024, 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 "jni_tools.hpp"
#include "agent_common.hpp"
#include "JVMTITools.hpp"
extern "C" {
#define STATUS_PASSED 0
#define STATUS_FAILED 2
static jvmtiEnv *jvmti = nullptr;
static jint result = STATUS_PASSED;
static jboolean printdump = JNI_FALSE;
void print_LocalVariableEntry(jvmtiLocalVariableEntry *lvt_elem) {
printf("\n Var name: %s, slot: %d", lvt_elem->name, lvt_elem->slot);
printf(", start_bci: %" LL "d", lvt_elem->start_location);
printf(", end_bci: %" LL "d", lvt_elem->start_location + lvt_elem->length);
printf(", signature: %s\n", lvt_elem->signature);
}
#ifdef STATIC_BUILD
JNIEXPORT jint JNICALL Agent_OnLoad_getlocal004(JavaVM *jvm, char *options, void *reserved) {
return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNICALL Agent_OnAttach_getlocal004(JavaVM *jvm, char *options, void *reserved) {
return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNI_OnLoad_getlocal004(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;
static jvmtiCapabilities caps;
if (options != nullptr && strcmp(options, "printdump") == 0) {
printdump = JNI_TRUE;
}
res = jvm->GetEnv((void **) &jvmti, JVMTI_VERSION_1_1);
if (res != JNI_OK || jvmti == nullptr) {
printf("Wrong result of a valid call to GetEnv!\n");
return JNI_ERR;
}
err = jvmti->GetPotentialCapabilities(&caps);
if (err != JVMTI_ERROR_NONE) {
printf("(GetPotentialCapabilities) unexpected error: %s (%d)\n",
TranslateError(err), err);
return JNI_ERR;
}
err = jvmti->AddCapabilities(&caps);
if (err != JVMTI_ERROR_NONE) {
printf("(AddCapabilities) unexpected error: %s (%d)\n",
TranslateError(err), err);
return JNI_ERR;
}
err = jvmti->GetCapabilities(&caps);
if (err != JVMTI_ERROR_NONE) {
printf("(GetCapabilities) unexpected error: %s (%d)\n",
TranslateError(err), err);
return JNI_ERR;
}
if (!caps.can_access_local_variables) {
printf("Warning: Access to local variables is not implemented\n");
return JNI_ERR;
}
if (!caps.can_access_local_variables) {
printf("Warning: Access to local variables is not implemented\n");
return JNI_ERR;
}
return JNI_OK;
}
JNIEXPORT void JNICALL
Java_nsk_jvmti_unit_GetLocalVariable_getlocal004_getMeth(JNIEnv *env, jclass cls) {
jmethodID mid = nullptr;
if (jvmti == nullptr) {
printf("JVMTI client was not properly loaded!\n");
result = STATUS_FAILED;
return;
}
mid = env->GetStaticMethodID(cls, "staticMeth", "(I)I");
if (mid == nullptr) {
printf("Cannot find Method ID for staticMeth\n");
result = STATUS_FAILED;
return;
}
fflush(stdout);
}
void checkErrorCodeIn(jvmtiError err, jint slot) {
if (err != JVMTI_ERROR_NONE) {
printf(" FAILURE: JVMTI_ERROR_NONE is expected, slot: %d\n\n", slot);
result = STATUS_FAILED;
} else {
printf(" success: JVMTI_ERROR_NONE as expected, slot: %d\n\n", slot);
}
}
void checkErrorCodeOut(jvmtiError err, jint slot) {
if (err != JVMTI_ERROR_INVALID_SLOT) {
printf(" FAILURE: JVMTI_ERROR_INVALID_SLOT is expected, slot: %d\n\n", slot);
result = STATUS_FAILED;
} else {
printf(" success: JVMTI_ERROR_INVALID_SLOT as expected, slot: %d\n\n", slot);
}
}
#define CHECK_ERROR_CODE(scope_no, err, slot) \
if (scope_no == 1) { \
checkErrorCodeOut(err, slot); \
} else { \
checkErrorCodeIn(err, slot); \
}
JNIEXPORT void JNICALL
Java_nsk_jvmti_unit_GetLocalVariable_getlocal004_checkLoc(JNIEnv *env,
jclass cls, jthread thr, jint scope_no) {
jvmtiError err = JVMTI_ERROR_NONE;
jint slot = 0;
jint locInt = 0;
jlong locLong = 0L;
jdouble locDouble = 0.0f;
if (jvmti == nullptr) {
return;
}
printf("\n ----------------- checkLoc: %d -----------------\n\n", scope_no);
/* Check for slots which has to be available in general */
for (slot = 3; slot < 5; slot++) {
err = jvmti->GetLocalInt(thr, 1, slot, &locInt);
printf(" GetLocalInt: %s (%d)\n", TranslateError(err), err);
CHECK_ERROR_CODE(scope_no, err, slot);
if (err == JVMTI_ERROR_NONE) {
printf(" slot%d: %d\n", slot, locInt);
}
err = jvmti->GetLocalLong(thr, 1, slot, &locLong);
printf(" GetLocalLong: %s (%d)\n", TranslateError(err), err);
CHECK_ERROR_CODE(scope_no, err, slot);
err = jvmti->GetLocalDouble(thr, 1, slot, &locDouble);
printf(" GetLocalDouble: %s (%d)\n", TranslateError(err), err);
CHECK_ERROR_CODE(scope_no, err, slot);
}
/* Slot 5 is special: it's not for 64 bit values! */
slot = 5; {
err = jvmti->GetLocalInt(thr, 1, slot, &locInt);
printf(" GetLocalInt: %s (%d)\n", TranslateError(err), err);
CHECK_ERROR_CODE(scope_no, err, slot);
if (err == JVMTI_ERROR_NONE) {
printf(" slot%d: %d\n", slot, locInt);
}
err = jvmti->GetLocalLong(thr, 1, slot, &locLong);
printf(" GetLocalLong: %s (%d)\n", TranslateError(err), err);
checkErrorCodeOut(err, slot);
err = jvmti->GetLocalDouble(thr, 1, slot, &locDouble);
printf(" GetLocalDouble: %s (%d)\n", TranslateError(err), err);
checkErrorCodeOut(err, slot);
}
/* Check for slots which has to be unavailable in general */
for (slot = 6; slot < 8; slot++) {
err = jvmti->GetLocalInt(thr, 1, slot, &locInt);
printf(" GetLocalInt: %s (%d)\n", TranslateError(err), err);
checkErrorCodeOut(err, slot);
if (err == JVMTI_ERROR_NONE) {
printf(" slot%d: %d\n", slot, locInt);
}
err = jvmti->GetLocalLong(thr, 1, slot, &locLong);
printf(" GetLocalLong: %s (%d)\n", TranslateError(err), err);
checkErrorCodeOut(err, slot);
err = jvmti->GetLocalDouble(thr, 1, slot, &locDouble);
printf(" GetLocalDouble: %s (%d)\n", TranslateError(err), err);
checkErrorCodeOut(err, slot);
}
fflush(stdout);
}
JNIEXPORT jint JNICALL
Java_nsk_jvmti_unit_GetLocalVariable_getlocal004_getRes(JNIEnv *env, jclass cls) {
return result;
}
}
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