ilusha/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython synced 2026-09-29 12:10:30 +03:00
Code Issues Projects Releases Packages Wiki Activity Actions

gh-115491: Keep some fields valid across allocations (free-threading) (#115573)

Browse source 
This avoids filling the memory occupied by ob_tid, ob_ref_local, and
ob_ref_shared with debug bytes (e.g., 0xDD) in mimalloc in the
free-threaded build.
This commit is contained in:
Sam Gross 2024-02-20 10:36:40 -05:00 • committed by GitHub
parent c0b0c2f201
commit cc82e33af9
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
5 changed files with 33 additions and 25 deletions
Download patch file Download diff file Expand all files Collapse all files

23
Objects/mimalloc/init.c
View file

@ -13,27 +13,7 @@ terms of the MIT license. A copy of the license can be found in the file
// Empty page used to initialize the small free pages array
const mi_page_t _mi_page_empty = {
0, false, false, false, 0,
0, // capacity
0, // reserved capacity
{ 0 }, // flags
false, // is_zero
0, // retire_expire
NULL, // free
0, // used
0, // xblock_size
NULL, // local_free
#if (MI_PADDING || MI_ENCODE_FREELIST)
{ 0, 0 },
#endif
MI_ATOMIC_VAR_INIT(0), // xthread_free
MI_ATOMIC_VAR_INIT(0), // xheap
NULL, NULL
#if MI_INTPTR_SIZE==8
, { 0 } // padding
#endif
};
const mi_page_t _mi_page_empty;
#define MI_PAGE_EMPTY() ((mi_page_t*)&_mi_page_empty)
@ -122,6 +102,7 @@ mi_decl_cache_align const mi_heap_t _mi_heap_empty = {
MI_BIN_FULL, 0, // page retired min/max
NULL, // next
false,
0,
0
};