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Prevent crashes if freed objects are passed to SDL API functions

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Instead of using the magic tag in the object, we'll actually keep track of valid objects

Fixes https://github.com/libsdl-org/SDL/issues/9869
Fixes https://github.com/libsdl-org/SDL/issues/9235
This commit is contained in:
Sam Lantinga 2024-06-03 04:09:28 -07:00
parent 57a15933cd
commit b0e93e4e63
28 changed files with 191 additions and 126 deletions
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5
src/render/SDL_sysrender.h
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@ -44,8 +44,6 @@ typedef struct SDL_DRect
/* The SDL 2D rendering system */
typedef struct SDL_RenderDriver SDL_RenderDriver;
extern char SDL_renderer_magic;
extern char SDL_texture_magic;
/* Rendering view state */
typedef struct SDL_RenderViewState
@ -62,7 +60,6 @@ typedef struct SDL_RenderViewState
/* Define the SDL texture structure */
struct SDL_Texture
{
const void *magic;
SDL_Colorspace colorspace; /**< The colorspace of the texture */
float SDR_white_point; /**< The SDR white point for this content */
float HDR_headroom; /**< The HDR headroom needed by this content */
@ -160,8 +157,6 @@ typedef enum
/* Define the SDL renderer structure */
struct SDL_Renderer
{
const void *magic;
void (*WindowEvent)(SDL_Renderer *renderer, const SDL_WindowEvent *event);
int (*GetOutputSize)(SDL_Renderer *renderer, int *w, int *h);
SDL_bool (*SupportsBlendMode)(SDL_Renderer *renderer, SDL_BlendMode blendMode);