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Emscripten: Remove no-longer-needed minimum emmalloc alignment #891

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Merged
merged 1 commit into from
May 11, 2024
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Emscripten: Remove no-longer-needed minimum emmalloc alignment #891

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9 changes: 1 addition & 8 deletions src/prim/emscripten/prim.c
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Original file line number Diff line number Diff line change
Expand Up @@ -78,17 +78,10 @@ int _mi_prim_alloc(size_t size, size_t try_alignment, bool commit, bool allow_la
// That assumes no one else uses sbrk but us (they could go up,
// scribble, and then down), but we could assert on that perhaps.
*is_zero = false;
// emmalloc has some limitations on alignment size.
// TODO: Why does mimalloc ask for an align of 4MB? that ends up allocating
// 8, which wastes quite a lot for us in wasm. If that is unavoidable,
// we may want to improve emmalloc to support such alignment. See also
// https://github.com/emscripten-core/emscripten/issues/20645
// emmalloc has a minimum alignment size.
#define MIN_EMMALLOC_ALIGN 8
#define MAX_EMMALLOC_ALIGN (1024*1024)
if (try_alignment < MIN_EMMALLOC_ALIGN) {
try_alignment = MIN_EMMALLOC_ALIGN;
} else if (try_alignment > MAX_EMMALLOC_ALIGN) {
try_alignment = MAX_EMMALLOC_ALIGN;
}
void* p = emmalloc_memalign(try_alignment, size);
*addr = p;
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