Attachment 22489 Details for Bug 19911 – Test case to trigger the crash

Test case to trigger the crash

crash_vbo.c (text/plain), 3.38 KB, created by Peter Clifton on 2009-02-02 09:44:34 UTC

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Creator: Peter Clifton

Created: 2009-02-02 09:44:34 UTC

Size: 3.38 KB

patch

obsolete

>#include <stdio.h>
>#include <stdlib.h>
>
>#define GL_GLEXT_PROTOTYPES 1
>#include <GL/gl.h>
>#include <GL/glut.h>
>
>#define WINDSIZEX 300
>#define WINDSIZEY 300
>
>#define TRIANGLE_COUNT1 1
>#define TRIANGLE_COUNT2 2
>#define TRIANGLE_ARRAY_BYTES (sizeof (GLfloat) * 2 * 3 * TRIANGLE_COUNT1)
>
>void
>display (void)
>{
>  GLuint vbo_name;
>  GLfloat *triangle_array1;
>  GLfloat *triangle_array2;
>  int i, v;
>
>  triangle_array2 = malloc (sizeof (GLfloat) * 2 * 3 * TRIANGLE_COUNT2);
>
>  glClearColor (0.0f, 0.0f, 0.0f, 0.0f);
>  glClear (GL_COLOR_BUFFER_BIT);
>
>  glEnableClientState (GL_VERTEX_ARRAY);
>
>  glGenBuffers (1, &vbo_name);
>  glBindBuffer (GL_ARRAY_BUFFER, vbo_name);
>  glBufferData (GL_ARRAY_BUFFER, TRIANGLE_ARRAY_BYTES, NULL, GL_STATIC_DRAW);
>  triangle_array1 = glMapBuffer (GL_ARRAY_BUFFER, GL_WRITE_ONLY);
>
>  if (triangle_array1 == NULL) {
>    fprintf (stderr, "Couldn't map VBO\n");
>    exit (1);
>  }
>
>  v = 0;
>  for (i = 0; i < TRIANGLE_COUNT1; i++) {                      //
>    triangle_array1 [v++] = -1.;  triangle_array1 [v++] = -1.; //   /|
>    triangle_array1 [v++] =  1.;  triangle_array1 [v++] = -1.; //  / |
>    triangle_array1 [v++] =  1.;  triangle_array1 [v++] =  1.; // /__|
>  }
>
>  v = 0;
>  for (i = 0; i < TRIANGLE_COUNT2; i++) {                      //  ___
>    triangle_array2 [v++] = -1.;  triangle_array2 [v++] = -1.; // |  /
>    triangle_array2 [v++] = -1.;  triangle_array2 [v++] =  1.; // | /
>    triangle_array2 [v++] =  1.;  triangle_array2 [v++] =  1.; // |/
>  }
>
>  glUnmapBuffer (GL_ARRAY_BUFFER);
>  glVertexPointer (2, GL_FLOAT, 0, NULL);
>  glDrawArrays (GL_TRIANGLES, 0, 3 * TRIANGLE_COUNT1);
>  triangle_array1 = glMapBuffer (GL_ARRAY_BUFFER, GL_WRITE_ONLY);
>
>  /* START DELIBERATE BUG */
>  glVertexPointer (2, GL_FLOAT, 0, triangle_array2);
>  glDrawArrays (GL_POINTS, 0, 3 * TRIANGLE_COUNT2);
>  glDisableClientState (GL_VERTEX_ARRAY);
>  glDisable (GL_COLOR_LOGIC_OP);
>  /* END DELIBARATE BUG */
>
>  /* Not sure if this is needed, but it crashes with.. haven't tested without */
>#if 1
>  glGenBuffers (1, &vbo_name);
>  glBindBuffer (GL_ARRAY_BUFFER, vbo_name);
>  glBufferData (GL_ARRAY_BUFFER, TRIANGLE_ARRAY_BYTES, NULL, GL_STATIC_DRAW);
>  triangle_array1 = glMapBuffer (GL_ARRAY_BUFFER, GL_WRITE_ONLY);
>
>  v = 0;
>  for (i = 0; i < TRIANGLE_COUNT1; i++) {                      //
>    triangle_array1 [v++] = -1.;  triangle_array1 [v++] = -1.; //   /|
>    triangle_array1 [v++] =  1.;  triangle_array1 [v++] = -1.; //  / |
>    triangle_array1 [v++] =  1.;  triangle_array1 [v++] =  1.; // /__|
>  }
>#endif
>
>  glVertexPointer (2, GL_FLOAT, 0, NULL);
>  glDrawArrays (GL_TRIANGLES, 0, 3 * TRIANGLE_COUNT1);
>
>  glBindBuffer (GL_ARRAY_BUFFER, 0);
>  glDeleteBuffers (1, &vbo_name);
>
>  glutSwapBuffers();
>  free (triangle_array2);
>}
>
>int
>main (int argc, char** argv)
>{
>  glutInit (&argc, argv);
>  glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGB);
>  glutInitWindowSize (WINDSIZEX, WINDSIZEY);
>  glutCreateWindow (argv[0]);
>  glutDisplayFunc (display);
>
>  glMatrixMode (GL_PROJECTION);
>  gluPerspective (/* field of view in degree */ 40.0,
>                             /* aspect ratio */ 1.0,
>                                   /* Z near */ 1.0,
>                                   /* Z far */ 70.0);
>  glMatrixMode(GL_MODELVIEW);
>  gluLookAt (0.0, 0.0, 5.0,      /* eye is at (0,0,5) */
>             0.0, 0.0, 0.0,      /* center is at (0,0,0) */
>             0.0, 1.0, 0.);      /* up is in positive Y direction */
>
>  glutMainLoop ();
>  return 0;
>}

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Attachments on bug 19911: 22489 | 22490

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