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allow size==0 for mi_prim_free (issue #1041)

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daanx 2025-05-02 08:40:21 -07:00
parent fae61ed946
commit 6bfb1c656c
3 changed files with 12 additions and 11 deletions
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4
src/prim/emscripten/prim.c
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@ -1,5 +1,5 @@
/* ----------------------------------------------------------------------------
Copyright (c) 2018-2023, Microsoft Research, Daan Leijen, Alon Zakai
Copyright (c) 2018-2025, Microsoft Research, Daan Leijen, Alon Zakai
This is free software; you can redistribute it and/or modify it under the
terms of the MIT license. A copy of the license can be found in the file
"LICENSE" at the root of this distribution.
@ -58,7 +58,7 @@ void _mi_prim_mem_init( mi_os_mem_config_t* config) {
extern void emmalloc_free(void*);
int _mi_prim_free(void* addr, size_t size) {
MI_UNUSED(size);
if (size==0) return 0;
emmalloc_free(addr);
return 0;
}

5
src/prim/unix/prim.c
View file

@ -1,5 +1,5 @@
/* ----------------------------------------------------------------------------
Copyright (c) 2018-2023, Microsoft Research, Daan Leijen
Copyright (c) 2018-2025, Microsoft Research, Daan Leijen
This is free software; you can redistribute it and/or modify it under the
terms of the MIT license. A copy of the license can be found in the file
"LICENSE" at the root of this distribution.
@ -70,7 +70,7 @@ terms of the MIT license. A copy of the license can be found in the file
#define MADV_FREE POSIX_MADV_FREE
#endif
//------------------------------------------------------------------------------------
// Use syscalls for some primitives to allow for libraries that override open/read/close etc.
// and do allocation themselves; using syscalls prevents recursion when mimalloc is
@ -186,6 +186,7 @@ void _mi_prim_mem_init( mi_os_mem_config_t* config )
//---------------------------------------------
int _mi_prim_free(void* addr, size_t size ) {
if (size==0) return 0;
bool err = (munmap(addr, size) == -1);
return (err ? errno : 0);
}