kiper220/mimalloc
1
0
Fork 0
mirror of https://github.com/microsoft/mimalloc.git synced 2025-07-06 11:34:38 +03:00
Code Issues Projects Releases Packages Wiki Activity Actions

add MI_PADDING build option to add padding to each block to detect heap block overflows

Browse source
This commit is contained in:
daan 2020-01-29 17:10:57 -08:00
parent 9a532037df
commit 5d212d688f
3 changed files with 57 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

18
include/mimalloc-types.h
View file

@ -12,6 +12,10 @@ terms of the MIT license. A copy of the license can be found in the file
#include <stdint.h> // uintptr_t, uint16_t, etc
#include <mimalloc-atomic.h> // _Atomic
// Minimal alignment necessary. On most platforms 16 bytes are needed
// due to SSE registers for example. This must be at least `MI_INTPTR_SIZE`
#define MI_MAX_ALIGN_SIZE 16 // sizeof(max_align_t)
// ------------------------------------------------------
// Variants
// ------------------------------------------------------
@ -50,6 +54,16 @@ terms of the MIT license. A copy of the license can be found in the file
#define MI_ENCODE_FREELIST 1
#endif
// Reserve extra padding at the end of each block; must be a multiple of `sizeof(intptr_t)`!
// If free lists are encoded, the padding is checked if it was modified on free.
#if (!defined(MI_PADDING))
#if (MI_SECURE>=3 || MI_DEBUG>=1)
#define MI_PADDING MI_MAX_ALIGN_SIZE
#else
#define MI_PADDING 0
#endif
#endif
// ------------------------------------------------------
// Platform specific values
// ------------------------------------------------------
@ -113,10 +127,6 @@ terms of the MIT license. A copy of the license can be found in the file
#define MI_LARGE_OBJ_WSIZE_MAX (MI_LARGE_OBJ_SIZE_MAX/MI_INTPTR_SIZE)
#define MI_HUGE_OBJ_SIZE_MAX (2*MI_INTPTR_SIZE*MI_SEGMENT_SIZE) // (must match MI_REGION_MAX_ALLOC_SIZE in memory.c)
// Minimal alignment necessary. On most platforms 16 bytes are needed
// due to SSE registers for example. This must be at least `MI_INTPTR_SIZE`
#define MI_MAX_ALIGN_SIZE 16 // sizeof(max_align_t)
// Maximum number of size classes. (spaced exponentially in 12.5% increments)
#define MI_BIN_HUGE (73U)