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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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14
src/os.c
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@ -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.
@ -167,8 +167,8 @@ static void mi_os_free_huge_os_pages(void* p, size_t size);
static void mi_os_prim_free(void* addr, size_t size, size_t commit_size) {
mi_assert_internal((size % _mi_os_page_size()) == 0);
if (addr == NULL || size == 0) return; // || _mi_os_is_huge_reserved(addr)
int err = _mi_prim_free(addr, size);
if (addr == NULL) return; // || _mi_os_is_huge_reserved(addr)
int err = _mi_prim_free(addr, size); // allow size==0 (issue #1041)
if (err != 0) {
_mi_warning_message("unable to free OS memory (error: %d (0x%x), size: 0x%zx bytes, address: %p)\n", err, err, size, addr);
}
@ -186,10 +186,10 @@ void _mi_os_free_ex(void* addr, size_t size, bool still_committed, mi_memid_t me
void* base = addr;
// different base? (due to alignment)
if (memid.mem.os.base != base) {
mi_assert(memid.mem.os.base <= addr);
mi_assert(memid.mem.os.base <= addr);
base = memid.mem.os.base;
const size_t diff = (uint8_t*)addr - (uint8_t*)memid.mem.os.base;
if (memid.mem.os.size==0) {
if (memid.mem.os.size==0) {
csize += diff;
}
if (still_committed) {
@ -733,8 +733,8 @@ static int mi_os_numa_node_get(void) {
}
int _mi_os_numa_node(void) {
if mi_likely(mi_atomic_load_relaxed(&mi_numa_node_count) == 1) {
return 0;
if mi_likely(mi_atomic_load_relaxed(&mi_numa_node_count) == 1) {
return 0;
}
else {
return mi_os_numa_node_get();