android开发jni开发遍历文件夹下的文件以及目录

//kotlin层
external fun listFiles(filePath:String): String
    
//native层
#include <jni.h>
#include <string>
#include <dirent.h>
#include <android/log.h>

#ifndef LOG_TAG
#define LOG_TAG "HELLO_JNI"
#define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG,LOG_TAG ,__VA_ARGS__) // 定义LOGD类型
#define LOGI(...) __android_log_print(ANDROID_LOG_INFO,LOG_TAG ,__VA_ARGS__) // 定义LOGI类型
#define LOGW(...) __android_log_print(ANDROID_LOG_WARN,LOG_TAG ,__VA_ARGS__) // 定义LOGW类型
#define LOGE(...) __android_log_print(ANDROID_LOG_ERROR,LOG_TAG ,__VA_ARGS__) // 定义LOGE类型
#define LOGF(...) __android_log_print(ANDROID_LOG_FATAL,LOG_TAG ,__VA_ARGS__) // 定义LOGF类型
#endif
    
extern "C"
JNIEXPORT jstring JNICALL
Java_com_suyf_ndkdev_MainActivity_listFiles(JNIEnv *env, jobject thiz, jstring file_path) {
    const char *path = env->GetStringUTFChars(file_path, 0);
    DIR *dirPtr = opendir(path);
    struct dirent *ptr;
    char base[1000];

    if (dirPtr == NULL) {
        LOGE("opendir fail.....................");
        exit(-1);
    }

    while ((ptr = readdir(dirPtr)) != NULL) {
        if (strcmp(ptr->d_name, ".") == 0 ||
            strcmp(ptr->d_name, "..") == 0)    ///current dir OR parrent dir
            continue;
        else if (ptr->d_type == 8)    ///file
            LOGE("d_name:%s/%s\n", path, ptr->d_name);
        else if (ptr->d_type == 10)    ///link file
            printf("d_name:%s/%s\n", path, ptr->d_name);
        else if (ptr->d_type == 4) {    ///dir
            memset(base, '\0', sizeof(base));
            strcpy(base, path);
            strcat(base,"/");
            strcat(base,ptr->d_name);
            LOGE("d_dir:%s/%s\n", path, ptr->d_name);
            jstring newDir = env->NewStringUTF(base);
            Java_com_suyf_ndkdev_MainActivity_listFiles(env,thiz,newDir);
        }
    }
    closedir(dirPtr);
    return file_path;
}

错误记录：

Fatal signal 5 (SIGTRAP) code 1 (TRAP_BRKPT)
native层函数缺少return返回值