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* gh-112532: Isolate abandoned segments by interpreter Mimalloc segments are data structures that contain memory allocations along with metadata. Each segment is "owned" by a thread. When a thread exits, it abandons its segments to a global pool to be later reclaimed by other threads. This changes the pool to be per-interpreter instead of process-wide. This will be important for when we use mimalloc to find GC objects in the `--disable-gil` builds. We want heaps to only store Python objects from a single interpreter. Absent this change, the abandoning and reclaiming process could break this isolation. * Add missing '&_mi_abandoned_default' to 'tld_empty'
51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
#ifndef Py_INTERNAL_MIMALLOC_H
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#define Py_INTERNAL_MIMALLOC_H
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#ifndef Py_BUILD_CORE
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# error "this header requires Py_BUILD_CORE define"
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#endif
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#if defined(MIMALLOC_H) || defined(MIMALLOC_TYPES_H)
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# error "pycore_mimalloc.h must be included before mimalloc.h"
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#endif
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typedef enum {
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_Py_MIMALLOC_HEAP_MEM = 0, // PyMem_Malloc() and friends
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_Py_MIMALLOC_HEAP_OBJECT = 1, // non-GC objects
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_Py_MIMALLOC_HEAP_GC = 2, // GC objects without pre-header
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_Py_MIMALLOC_HEAP_GC_PRE = 3, // GC objects with pre-header
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_Py_MIMALLOC_HEAP_COUNT
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} _Py_mimalloc_heap_id;
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#include "pycore_pymem.h"
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#ifdef WITH_MIMALLOC
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#define MI_DEBUG_UNINIT PYMEM_CLEANBYTE
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#define MI_DEBUG_FREED PYMEM_DEADBYTE
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#define MI_DEBUG_PADDING PYMEM_FORBIDDENBYTE
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#ifdef Py_DEBUG
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# define MI_DEBUG 1
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#else
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# define MI_DEBUG 0
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#endif
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#include "mimalloc.h"
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#include "mimalloc/types.h"
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#include "mimalloc/internal.h"
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#endif
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#ifdef Py_GIL_DISABLED
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struct _mimalloc_interp_state {
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// When exiting, threads place any segments with live blocks in this
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// shared pool for other threads to claim and reuse.
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mi_abandoned_pool_t abandoned_pool;
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};
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struct _mimalloc_thread_state {
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mi_heap_t *current_object_heap;
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mi_heap_t heaps[_Py_MIMALLOC_HEAP_COUNT];
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mi_tld_t tld;
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};
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#endif
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#endif // Py_INTERNAL_MIMALLOC_H
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