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emscripten: Make sure SDL_malloc and friends are marked KEEPALIVE.

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Reference PR #9937.
This commit is contained in:
Ryan C. Gordon
2024-08-19 23:49:07 -04:00
parent e75175129f
commit 423d6ec15a
3 changed files with 16 additions and 5 deletions
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11
src/stdlib/SDL_malloc.c
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@@ -5196,6 +5196,17 @@ static void SDLCALL real_free(void *p) { free(p); }
#define real_free dlfree
#endif
// mark the allocator entry points as KEEPALIVE so we can call these from JavaScript.
// otherwise they could could get so aggressively inlined that their symbols
// don't exist at all in the final binary!
#ifdef SDL_PLATFORM_EMSCRIPTEN
#include <emscripten/emscripten.h>
extern SDL_DECLSPEC SDL_MALLOC EMSCRIPTEN_KEEPALIVE void * SDLCALL SDL_malloc(size_t size);
extern SDL_DECLSPEC SDL_MALLOC SDL_ALLOC_SIZE2(1, 2) EMSCRIPTEN_KEEPALIVE void * SDLCALL SDL_calloc(size_t nmemb, size_t size);
extern SDL_DECLSPEC SDL_ALLOC_SIZE(2) EMSCRIPTEN_KEEPALIVE void * SDLCALL SDL_realloc(void *mem, size_t size);
extern SDL_DECLSPEC EMSCRIPTEN_KEEPALIVE void SDLCALL SDL_free(void *mem);
#endif
/* Memory functions used by SDL that can be replaced by the application */
static struct
{