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Question

即使应用sqlite_close，sqlite3_finalize，我在sqlite3_open上也会出现内存泄漏，请指导我出错的地方。项目在非ARC。

     -(BOOL)saveMedia:(NSDictionary *)details Download:(NSInteger)completed
{
    //NSLog(@"media savemedia %@",[details objectForKey:@"type"]);
    BOOL saved = FALSE;
    NSInteger exists = [self findMedia:[details objectForKey:@"media_id"] playlist_id:[details objectForKey:@"playlist_id"] type:[details objectForKey:@"type"]];
    sqlite3_stmt    *statement;

    self.databasePath = [self getDBPath];
    const char *dbpath = [databasePath UTF8String];
    if (sqlite3_open(dbpath, &wazzupco) == SQLITE_OK)
    {
        const char *query_stmt;
        if (exists == 0)
        {
            query_stmt = "INSERT INTO media (media_id, title, description, file, views, thumbnail, version, playlist, playlist_id, author, created_at, type, playlist_created, timeout, playlist_order, media_order, playlist_promo_text, playlist_promo_url, playlist_promo_img,video_promo_text, video_promo_url, video_promo_img, dev_id, device_id, downloaded,slide_timeout) VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)";
        }
        else if([[details objectForKey:@"version"] integerValue] > exists)
        {
            NSString *querySQL = [NSString stringWithFormat:@"UPDATE %@ SET media_id=?, title=?, description=?, file=?, views=?, thumbnail=?, version=?, playlist=?, playlist_id=?, author=?, created_at=?, type=?, playlist_created=?, timeout=?, playlist_order=?, media_order=?, playlist_promo_text=?, playlist_promo_url=?, playlist_promo_img=?,video_promo_text=?, video_promo_url=?, video_promo_img=?, dev_id=?, device_id=?, downloaded=?, slide_timeout=? WHERE media_id='%@' AND playlist_id='%@' AND type='%@'", TABLE_MEDIA, [details objectForKey:@"media_id"], [details objectForKey:@"playlist_id"], [details objectForKey:@"type"]];
            query_stmt = [querySQL UTF8String];
        }
        else
        {
            //to make sure we won't update the database entry unless its a newer version
            return FALSE;
        }
        sqlite3_prepare_v2(wazzupco, query_stmt, -1, &statement, NULL);

        sqlite3_bind_text(statement, 1, [[details objectForKey:@"media_id"] UTF8String], -1, NULL);
        sqlite3_bind_text(statement, 2, [[details objectForKey:@"title"] UTF8String], -1, NULL);
        sqlite3_bind_text(statement, 3, [[details objectForKey:@"description"] UTF8String], -1, NULL);
        sqlite3_bind_text(statement, 4, [[details objectForKey:@"file"] UTF8String], -1, NULL);
        sqlite3_bind_text(statement, 5, [[details objectForKey:@"views"] UTF8String], -1, NULL);
        sqlite3_bind_text(statement, 6, [[details objectForKey:@"thumbnail"] UTF8String], -1, NULL);
        sqlite3_bind_text(statement, 7, [[details objectForKey:@"version"] UTF8String], -1, NULL);
        sqlite3_bind_text(statement, 8, [[details objectForKey:@"playlist"] UTF8String], -1, NULL);
        sqlite3_bind_text(statement, 9, [[details objectForKey:@"playlist_id"] UTF8String], -1, NULL);
        sqlite3_bind_text(statement, 10, [[details objectForKey:@"author"] UTF8String], -1, NULL);
        sqlite3_bind_text(statement, 11, [[details objectForKey:@"created_at"] UTF8String], -1, NULL);
        sqlite3_bind_text(statement, 12, [[details objectForKey:@"type"] UTF8String], -1, NULL);
        sqlite3_bind_text(statement, 13, [[details objectForKey:@"playlist_created"] UTF8String], -1, NULL);
        sqlite3_bind_text(statement, 14, [[details objectForKey:@"timeout"] UTF8String], -1, NULL);
        sqlite3_bind_int(statement, 15, [[details objectForKey:@"playlist_order"] intValue]);
        sqlite3_bind_int(statement, 16, [[details objectForKey:@"media_order"] intValue]);
        sqlite3_bind_text(statement, 17, [[details objectForKey:@"playlist_promo_text"] UTF8String], -1, NULL);
        sqlite3_bind_text(statement, 18, [[details objectForKey:@"playlist_promo_url"] UTF8String], -1, NULL);
        sqlite3_bind_text(statement, 19, [[details objectForKey:@"playlist_promo_img"] UTF8String], -1, NULL);
        sqlite3_bind_text(statement, 20, [[details objectForKey:@"video_promo_text"] UTF8String], -1, NULL);
        sqlite3_bind_text(statement, 21, [[details objectForKey:@"video_promo_url"] UTF8String], -1, NULL);
        sqlite3_bind_text(statement, 22, [[details objectForKey:@"video_promo_img"] UTF8String], -1, NULL);
        sqlite3_bind_int(statement, 23, [[details objectForKey:@"dev_id"] intValue]);
        sqlite3_bind_text(statement, 24, [[details objectForKey:@"device_id"] UTF8String], -1, NULL);
        sqlite3_bind_int(statement, 25, (int)completed);
        sqlite3_bind_text(statement, 26, [[details objectForKey:@"slide_timeout"] UTF8String], -1, NULL);        
        if (sqlite3_step(statement) == SQLITE_DONE)
        {
            NSLog(@"media added. type:%@",[details objectForKey:@"type"]);
            saved = TRUE;
        }
        sqlite3_finalize(statement);
        //sqlite3_free(statement);
        //sqlite3_reset(statement);
    }
    sqlite3_close(wazzupco);
    if (completed != 0 && saved)
    {
        [self updateMediaStatus:[details objectForKey:@"file"] Download:1];
    }

    return saved;
}

在上面的代码中，我通过考虑数据是否已经存在，将数据从NSdictionary插入或更新到sqlite表。该方法执行正常，但它会产生严重的内存泄漏（该方法从循环中多次调用），当在Instrument中检查时，它显示泄漏位于if（sqlite3_open（dbpath，＆amp; wazzupco）== SQLITE_OK）。 / p>

来自仪器

泄露的对象：Malloc 64Bytes

18

地址大小：1.12KB 责任图书馆：libsqlite3.dylib 负责框架：0x34bdce30

Answer 1

当执行“else”情况时，似乎上述代码中的内存泄漏。

if (sqlite3_open(dbpath, &wazzupco) == SQLITE_OK)
{
    const char *query_stmt;
    if (exists == 0)
    {
        query_stmt = "INSERT INTO media (media_id, title, description, file, views, thumbnail, version, playlist, playlist_id, author, created_at, type, playlist_created, timeout, playlist_order, media_order, playlist_promo_text, playlist_promo_url, playlist_promo_img,video_promo_text, video_promo_url, video_promo_img, dev_id, device_id, downloaded,slide_timeout) VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)";
    }
    else if([[details objectForKey:@"version"] integerValue] > exists)
    {
        NSString *querySQL = [NSString stringWithFormat:@"UPDATE %@ SET media_id=?, title=?, description=?, file=?, views=?, thumbnail=?, version=?, playlist=?, playlist_id=?, author=?, created_at=?, type=?, playlist_created=?, timeout=?, playlist_order=?, media_order=?, playlist_promo_text=?, playlist_promo_url=?, playlist_promo_img=?,video_promo_text=?, video_promo_url=?, video_promo_img=?, dev_id=?, device_id=?, downloaded=?, slide_timeout=? WHERE media_id='%@' AND playlist_id='%@' AND type='%@'", TABLE_MEDIA, [details objectForKey:@"media_id"], [details objectForKey:@"playlist_id"], [details objectForKey:@"type"]];
        query_stmt = [querySQL UTF8String];
    }
    else
    {
        //to make sure we won't update the database entry unless its a newer version
        return FALSE;
    }

当触发else情况时，未到达sqlite3_close（）并导致sqlite3_open内存泄漏

Answer 2

抱歉，我不熟悉这些SQL Lite和非ARC项目经过一些谷歌搜索我找到了这个解决方案。我应该考虑将项目转换为ARC。 ARC将为您处理内存管理。打开ARC时，编译器将插入适当的内存管理语句，例如retain和release消息。最好使用ARC，因为编译器可以更好地了解对象的生命周期，并且不易出现人为错误

将非ARC项目转换为启用ARC的项目。本网站可能会帮助您Enable ARC

Objective C - sqlite3_open内存泄漏，即使sqlite3_close（）已应用

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2 个答案: