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bpo-40609: _tracemalloc allocates traces (GH-20064)

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Rewrite _tracemalloc to store "trace_t*" rather than directly
"trace_t" in traces hash tables. Traces are now allocated on the heap
memory, outside the hash table.

Add tracemalloc_copy_traces() and tracemalloc_copy_domains() helper
functions.

Remove _Py_hashtable_copy() function since there is no API to copy a
key or a value.

Remove also _Py_hashtable_delete() function which was commented.
This commit is contained in:
Victor Stinner 2020-05-13 03:52:11 +02:00 • committed by GitHub
parent 2d0a3d682f
commit d95bd4214c
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 117 additions and 102 deletions
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10
Include/internal/pycore_hashtable.h
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@ -45,13 +45,6 @@ typedef struct {
sizeof(DATA)); \
} while (0)
#define _Py_HASHTABLE_ENTRY_WRITE_DATA(TABLE, ENTRY, DATA) \
do { \
assert(sizeof(DATA) == (TABLE)->data_size); \
memcpy((void *)_Py_HASHTABLE_ENTRY_PDATA(ENTRY), \
&(DATA), sizeof(DATA)); \
} while (0)
/* _Py_hashtable: prototypes */
@ -118,9 +111,6 @@ PyAPI_FUNC(_Py_hashtable_t *) _Py_hashtable_new_full(
PyAPI_FUNC(void) _Py_hashtable_destroy(_Py_hashtable_t *ht);
/* Return a copy of the hash table */
PyAPI_FUNC(_Py_hashtable_t *) _Py_hashtable_copy(_Py_hashtable_t *src);
PyAPI_FUNC(void) _Py_hashtable_clear(_Py_hashtable_t *ht);
typedef int (*_Py_hashtable_foreach_func) (_Py_hashtable_t *ht,