Question

#include <cstdlib>
#include <stdlib.h>
#include <iostream>
#include <SDL2/SDL.h>

int main ( int argc, char** argv )
{
const int height = 700;
const int width = 800;
if (SDL_Init(SDL_INIT_EVERYTHING) < 0){
    std::cout << "SDL Failed to initalize" << std::endl;
    return 1;
}
SDL_Window *window = SDL_CreateWindow("Particle Fire Explosion", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, width, height, SDL_WINDOW_SHOWN);

if (window == NULL){
    SDL_Quit();
    return 1;
}

SDL_Renderer *renderer = SDL_CreateRenderer(window, -1,     SDL_RENDERER_PRESENTVSYNC);
SDL_Texture *texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_STATIC, width, height);
if(renderer == NULL){
    std::cout << "COULD NOT CREATE RENDERER" << std::endl;
    SDL_DestroyTexture(texture);
    SDL_DestroyWindow(window);
    SDL_Quit();
    return 1;

}
if(texture == NULL){
    std::cout << "COULD NOT CREATE TEXTURE" << std::endl;
    SDL_DestroyRenderer(renderer);
    SDL_DestroyWindow(window);
    SDL_Quit();
    return 1;
}

Uint32 *buffer = new Uint32(width * height);
Uint32 *memsett = new Uint32(width * height * sizeof(Uint32));
memset(buffer, 0xFF, width*height*sizeof(Uint32));

SDL_UpdateTexture(texture, NULL, buffer, width*sizeof(Uint32));
SDL_RenderClear(renderer);
SDL_RenderCopy(renderer,texture, NULL, NULL);
SDL_RenderPresent(renderer);

bool quit = false;
SDL_Event event;

while (quit == false){


    while(SDL_PollEvent(&event)){
        if(event.type == SDL_QUIT){
            quit = true;
        }
    }

}
SDL_DestroyRenderer(renderer);
SDL_DestroyTexture(texture);
delete [] buffer;
SDL_DestroyWindow(window);
SDL_Quit();
return 0;
}

这是我的代码，我试图在SDL中创建一个全白窗口，试图使用memset这样但是它不起作用。该错误说：分段故障核心被丢弃。当我删除memset函数时它消失了，所以我知道memset正在使用的内存是使用内存不是免费的，所以我该如何更改？

Answer 1

Uin32 *buffer = new Uint32(width * height)分配一个值为Uint32的{{1}}，而不是width * height width * height的数组。您对Uint32的调用然后写入超出该单memset的结尾并进入无主内存。

您希望Uin32代替[]：

()

Memset分段故障核心被丢弃

1 个答案: