132 lines
3.8 KiB
C
132 lines
3.8 KiB
C
/*
|
|
* Copyright (c) 2017, 2018, Red Hat, Inc. 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"
|
|
|
|
#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 TranslateError(err) "JVMTI error"
|
|
|
|
#define PASSED 0
|
|
#define FAILED 2
|
|
|
|
static const char *EXC_CNAME = "java/lang/Exception";
|
|
|
|
static jvmtiEnv *jvmti = NULL;
|
|
static jint result = PASSED;
|
|
|
|
static jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved);
|
|
|
|
JNIEXPORT
|
|
jint JNICALL Agent_OnLoad(JavaVM *jvm, char *options, void *reserved) {
|
|
return Agent_Initialize(jvm, options, reserved);
|
|
}
|
|
|
|
JNIEXPORT
|
|
jint JNICALL Agent_OnAttach(JavaVM *jvm, char *options, void *reserved) {
|
|
return Agent_Initialize(jvm, options, reserved);
|
|
}
|
|
|
|
JNIEXPORT
|
|
jint JNICALL JNI_OnLoad(JavaVM *jvm, void *reserved) {
|
|
return JNI_VERSION_1_8;
|
|
}
|
|
|
|
static
|
|
jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
|
|
jvmtiCapabilities capabilities;
|
|
jint res = JNI_ENV_PTR(jvm)->GetEnv(JNI_ENV_ARG(jvm, (void **) &jvmti),
|
|
JVMTI_VERSION_9);
|
|
if (res != JNI_OK || jvmti == NULL) {
|
|
printf(" Error: wrong result of a valid call to GetEnv!\n");
|
|
return JNI_ERR;
|
|
}
|
|
|
|
(void)memset(&capabilities, 0, sizeof(capabilities));
|
|
capabilities.can_tag_objects = 1;
|
|
capabilities.can_generate_garbage_collection_events = 1;
|
|
(*jvmti)->AddCapabilities(jvmti, &capabilities);
|
|
|
|
return JNI_OK;
|
|
}
|
|
|
|
static
|
|
void throw_exc(JNIEnv *env, char *msg) {
|
|
jclass exc_class = JNI_ENV_PTR(env)->FindClass(JNI_ENV_ARG(env, EXC_CNAME));
|
|
jint rt = JNI_OK;
|
|
|
|
if (exc_class == NULL) {
|
|
printf("throw_exc: Error in FindClass(env, %s)\n", EXC_CNAME);
|
|
return;
|
|
}
|
|
rt = JNI_ENV_PTR(env)->ThrowNew(JNI_ENV_ARG(env, exc_class), msg);
|
|
if (rt == JNI_ERR) {
|
|
printf("throw_exc: Error in JNI ThrowNew(env, %s)\n", msg);
|
|
}
|
|
}
|
|
|
|
static jint JNICALL heap_iter_callback(jlong class_tag,
|
|
jlong size,
|
|
jlong* tag_ptr,
|
|
jint length,
|
|
void* user_data) {
|
|
(*((jint*)(user_data)))++;
|
|
return JVMTI_VISIT_OBJECTS;
|
|
}
|
|
|
|
JNIEXPORT jint JNICALL
|
|
Java_TestHeapDump_heapdump(JNIEnv *env, jclass cls, jclass filter_cls) {
|
|
jvmtiHeapCallbacks callbacks;
|
|
jint totalCount = 0;
|
|
if (jvmti == NULL) {
|
|
throw_exc(env, "JVMTI client was not properly loaded!\n");
|
|
return 0;
|
|
}
|
|
|
|
(void)memset(&callbacks, 0, sizeof(callbacks));
|
|
callbacks.heap_iteration_callback = &heap_iter_callback;
|
|
(*jvmti)->IterateThroughHeap(jvmti, 0, filter_cls, &callbacks, (const void *)&totalCount);
|
|
return totalCount;
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|