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Commit35d1ebd

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colesburyDinoV
authored andcommitted
mimalloc: minimal changes for use in Python
 - remove debug spam for freeing large allocations - use same bytes (0xDD) for freed allocations in CPython and mimalloc This is important for the test_capi debug memory tests
1 parentcb9ab74 commit35d1ebd

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3 files changed

+4
-3
lines changed

3 files changed

+4
-3
lines changed

‎Include/mimalloc/mimalloc/types.h

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -524,7 +524,7 @@ struct mi_heap_s {
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#defineMI_DEBUG_UNINIT (0xD0)
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#endif
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#if !defined(MI_DEBUG_FREED)
527-
#defineMI_DEBUG_FREED (0xDF)
527+
#defineMI_DEBUG_FREED (0xDD)
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#endif
529529
#if !defined(MI_DEBUG_PADDING)
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#defineMI_DEBUG_PADDING (0xDE)

‎Objects/mimalloc/alloc.c

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -533,7 +533,7 @@ static inline mi_segment_t* mi_checked_ptr_segment(const void* p, const char* ms
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mi_segment_t*constsegment=_mi_ptr_segment(p);
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mi_assert_internal(segment!=NULL);
535535

536-
#if (MI_DEBUG>0)
536+
#if0&&(MI_DEBUG>0)
537537
ifmi_unlikely(!mi_is_in_heap_region(p)) {
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#if (MI_INTPTR_SIZE==8&& defined(__linux__))
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if (((uintptr_t)p >>40)!=0x7F) {// linux tends to align large blocks above 0x7F000000000 (issue #640)

‎Objects/mimalloc/os.c

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -240,7 +240,8 @@ static void* mi_os_prim_alloc_aligned(size_t size, size_t alignment, bool commit
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}
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else {
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// if not aligned, free it, overallocate, and unmap around it
243-
_mi_warning_message("unable to allocate aligned OS memory directly, fall back to over-allocation (size: 0x%zx bytes, address: %p, alignment: 0x%zx, commit: %d)\n",size,p,alignment,commit);
243+
// NOTE(sgross): this warning causes issues in Python tests
244+
// _mi_warning_message("unable to allocate aligned OS memory directly, fall back to over-allocation (size: 0x%zx bytes, address: %p, alignment: 0x%zx, commit: %d)\n", size, p, alignment, commit);
244245
mi_os_prim_free(p,size,commit,stats);
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if (size >= (SIZE_MAX-alignment))returnNULL;// overflow
246247
constsize_tover_size=size+alignment;

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