c++ - OpenGL - 在抛出 '__gnu_cxx::recursive_init_error' 实例后调用终止？

Question

我一直在阅读有关现代 OpenGL 和 GLSL 的教程，但是当我运行该项目的示例时，它有时会中断。代码抛出:

terminate called after throwing an instance of '__gnu_cxx::recursive_init_error'
  what():  std::exception
Aborted (core dumped)

然后我决定重新制作它，看看它是不是源代码中的依赖项有问题，但还是出现了同样的错误。如果我运行它足够多次，它最终会产生所需的输出。

我已经寻找了其他答案，但它们是:

1. 关于线程(我认为我的代码中没有线程)；
2. 外语(翻译后得出相同的结论)；或
3. 指向 std 实现中谈论静态对象的模糊位置(因此根本没有帮助)。

主要.cpp:

#include <GL/glew.h>
#include <GL/freeglut.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include <iostream>
#include <fstream>
#include <sstream>
#include <string>
#include <vector>
#include <algorithm>

GLfloat vertices[] = 
{
    0.5, 0.5, 0.0, 1.0,
    0.5, -0.5, 0.0, 1.0,
    -0.5, -0.5, 0.0, 1.0,
    -0.5, 0.5, 0.0, 1.0,
};

GLuint program;
GLuint vbo;
GLuint vao;

GLuint loadShader(GLenum shaderType, const char *filename)
{
    GLuint shader = glCreateShader(shaderType);
    std::ifstream file(filename);
    std::stringstream data;
    data << file.rdbuf();
    file.close();

    const char *shaderData = data.str().c_str();
    glShaderSource(shader, 1, &shaderData, NULL);

    glCompileShader(shader);

    return shader;
}

GLuint createProgram(std::vector<GLuint> *list)
{
    GLuint prog = glCreateProgram();

    for(int i = 0; i < list->size(); i++)
    {
        glAttachShader(prog, list->at(i));
    }

    glLinkProgram(prog);

    for(int i = 0; i < list->size(); i++)
    {
        glDetachShader(prog, list->at(i));
    }

    return prog;
}

void display(void)
{
    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
    glClear(GL_COLOR_BUFFER_BIT);

    glUseProgram(program);

    glBindBuffer(GL_ARRAY_BUFFER, vbo);
    glEnableVertexAttribArray(0);
    glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 0, 0);

    glDrawArrays(GL_QUADS, 0, 4);
    
    glDisableVertexAttribArray(0);
    glUseProgram(0);

    glutSwapBuffers();
}

void init(void)
{
    std::vector<GLuint> shaderList;

    shaderList.push_back(loadShader(GL_VERTEX_SHADER, "vertexshader.vert"));
    shaderList.push_back(loadShader(GL_FRAGMENT_SHADER, "fragmentshader.frag"));

    program = createProgram(&shaderList);

    std::for_each(shaderList.begin(), shaderList.end(), glDeleteShader);

    glGenBuffers(1, &vbo);

    glBindBuffer(GL_ARRAY_BUFFER, vbo);
    glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
    glBindBuffer(GL_ARRAY_BUFFER, 0);

    glGenBuffers(1, &vao);
    glBindVertexArray(vao);
}

int main(int argc, char** argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE);
    glutInitWindowSize(250, 250);
    glutCreateWindow("OpenGL");

    glewInit();

    init();
    glutDisplayFunc(display);
    glutMainLoop();

    return 0;
}

vertexshader.vert:

#version 330

layout(location = 0) in vec4 pos;

void main()
{
    gl_Position = pos;
}

片段着色器.frag:

#version 330

out vec4 frag;

void main()
{
    frag = vec4(0.0f, 0.0f, 1.0f, 1.0f);
}

Tutorial Download

Answer 1

@genpfault 在这个声明中向我指出了答案

Double-check how long the temporary returned by data.str() is going to last. Hint: not very long :)

我所做的最终更改(在“loadShader”函数中)是:

GLuint loadShader(GLenum shaderType, const char *filename)
{
    ...

    std::string dataStr = data.str();
    const char *shaderData = dataStr.str();
    glShaderSource(shader, 1, &shaderData, NULL);

    ...
}

这实际上解决了原始问题和另一个视觉问题，在该问题中，窗口在其中渲染了我屏幕的左上角。

再次感谢!