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_tracemalloc: add domain to trace keys

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* hashtable.h: key has now a variable size
* _tracemalloc uses (pointer: void*, domain: unsigned int) as key for traces
This commit is contained in:
Victor Stinner 2016-03-18 21:52:22 +01:00
parent 5decb84454
commit 51b846c47a
4 changed files with 271 additions and 122 deletions
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188
Modules/_tracemalloc.c
View file

@ -3,6 +3,7 @@
#include "frameobject.h"
#include "pythread.h"
#include "osdefs.h"
#include <stddef.h> /* For offsetof */
/* Trace memory blocks allocated by PyMem_RawMalloc() */
#define TRACE_RAW_MALLOC
@ -54,6 +55,26 @@ static PyThread_type_lock tables_lock;
# define TABLES_UNLOCK()
#endif
typedef unsigned int domain_t;
/* FIXME: pack also? */
typedef struct {
void *ptr;
domain_t domain;
} pointer_t;
/* Size of pointer_t content, it can be smaller than sizeof(pointer_t) */
#define POINTER_T_SIZE \
(offsetof(pointer_t, domain) + sizeof(domain_t))
#define POINTER_T_FILL_PADDING(key) \
do { \
if (POINTER_T_SIZE != sizeof(pointer_t)) { \
memset((char *)&(key) + POINTER_T_SIZE, 0, \
sizeof(pointer_t) - POINTER_T_SIZE); \
} \
} while (0)
/* Pack the frame_t structure to reduce the memory footprint on 64-bit
architectures: 12 bytes instead of 16. This optimization might produce
SIGBUS on architectures not supporting unaligned memory accesses (64-bit
@ -196,23 +217,56 @@ set_reentrant(int reentrant)
}
#endif
static int
hashtable_compare_unicode(const void *key, const _Py_hashtable_entry_t *entry)
static Py_uhash_t
hashtable_hash_pointer(size_t key_size, const void *pkey)
{
if (key != NULL && entry->key != NULL)
return (PyUnicode_Compare((PyObject *)key, (PyObject *)entry->key) == 0);
pointer_t ptr;
Py_uhash_t hash;
assert(sizeof(ptr) == key_size);
ptr = *(pointer_t *)pkey;
hash = (Py_uhash_t)_Py_HashPointer(ptr.ptr);
hash ^= ptr.domain;
return hash;
}
static Py_uhash_t
hashtable_hash_pyobject(size_t key_size, const void *pkey)
{
PyObject *obj;
assert(key_size == sizeof(PyObject *));
obj = *(PyObject **)pkey;
return PyObject_Hash(obj);
}
static int
hashtable_compare_unicode(size_t key_size, const void *pkey,
const _Py_hashtable_entry_t *entry)
{
PyObject *key, *entry_key;
assert(sizeof(key) == key_size);
key = *(PyObject **)pkey;
assert(sizeof(entry_key) == key_size);
entry_key = *(PyObject **)_Py_HASHTABLE_ENTRY_KEY(entry);
if (key != NULL && entry_key != NULL)
return (PyUnicode_Compare(key, entry_key) == 0);
else
return key == entry->key;
return key == entry_key;
}
static _Py_hashtable_allocator_t hashtable_alloc = {malloc, free};
static _Py_hashtable_t *
hashtable_new(size_t data_size,
hashtable_new(size_t key_size, size_t data_size,
_Py_hashtable_hash_func hash_func,
_Py_hashtable_compare_func compare_func)
{
return _Py_hashtable_new_full(data_size, 0,
return _Py_hashtable_new_full(key_size, data_size, 0,
hash_func, compare_func,
NULL, NULL, NULL, &hashtable_alloc);
}
@ -230,20 +284,26 @@ raw_free(void *ptr)
}
static Py_uhash_t
hashtable_hash_traceback(const void *key)
hashtable_hash_traceback(size_t key_size, const void *pkey)
{
const traceback_t *traceback = key;
const traceback_t *traceback = *(const traceback_t **)pkey;
assert(key_size == sizeof(const traceback_t *));
return traceback->hash;
}
static int
hashtable_compare_traceback(const traceback_t *traceback1,
hashtable_compare_traceback(size_t key_size, const void *pkey,
const _Py_hashtable_entry_t *he)
{
const traceback_t *traceback2 = he->key;
traceback_t *traceback1, *traceback2;
const frame_t *frame1, *frame2;
int i;
assert(sizeof(traceback1) == key_size);
assert(sizeof(traceback2) == key_size);
traceback1 = *(traceback_t **)pkey;
traceback2 = *(traceback_t **)_Py_HASHTABLE_ENTRY_KEY(he);
if (traceback1->nframe != traceback2->nframe)
return 0;
@ -312,15 +372,16 @@ tracemalloc_get_frame(PyFrameObject *pyframe, frame_t *frame)
}
/* intern the filename */
entry = _Py_hashtable_get_entry(tracemalloc_filenames, filename);
entry = _Py_HASHTABLE_GET_ENTRY(tracemalloc_filenames, filename);
if (entry != NULL) {
filename = (PyObject *)entry->key;
assert(sizeof(filename) == tracemalloc_filenames->key_size);
filename = *(PyObject **)_Py_HASHTABLE_ENTRY_KEY(entry);
}
else {
/* tracemalloc_filenames is responsible to keep a reference
to the filename */
Py_INCREF(filename);
if (_Py_hashtable_set(tracemalloc_filenames, filename, NULL, 0) < 0) {
if (_Py_HASHTABLE_SET_NODATA(tracemalloc_filenames, filename) < 0) {
Py_DECREF(filename);
#ifdef TRACE_DEBUG
tracemalloc_error("failed to intern the filename");
@ -403,9 +464,10 @@ traceback_new(void)
traceback->hash = traceback_hash(traceback);
/* intern the traceback */
entry = _Py_hashtable_get_entry(tracemalloc_tracebacks, traceback);
entry = _Py_HASHTABLE_GET_ENTRY(tracemalloc_tracebacks, traceback);
if (entry != NULL) {
traceback = (traceback_t *)entry->key;
assert(sizeof(traceback) == tracemalloc_tracebacks->key_size);
traceback = *(traceback_t **)_Py_HASHTABLE_ENTRY_KEY(entry);
}
else {
traceback_t *copy;
@ -422,7 +484,7 @@ traceback_new(void)
}
memcpy(copy, traceback, traceback_size);
if (_Py_hashtable_set(tracemalloc_tracebacks, copy, NULL, 0) < 0) {
if (_Py_HASHTABLE_SET_NODATA(tracemalloc_tracebacks, copy) < 0) {
raw_free(copy);
#ifdef TRACE_DEBUG
tracemalloc_error("failed to intern the traceback: putdata failed");
@ -435,8 +497,9 @@ traceback_new(void)
}
static int
tracemalloc_add_trace(void *ptr, size_t size)
tracemalloc_add_trace(void *ptr, domain_t domain, size_t size)
{
pointer_t key;
traceback_t *traceback;
trace_t trace;
int res;
@ -445,10 +508,14 @@ tracemalloc_add_trace(void *ptr, size_t size)
if (traceback == NULL)
return -1;
key.ptr = ptr;
key.domain = 0;
POINTER_T_FILL_PADDING(key);
trace.size = size;
trace.traceback = traceback;
res = _Py_HASHTABLE_SET(tracemalloc_traces, ptr, trace);
res = _Py_HASHTABLE_SET(tracemalloc_traces, key, trace);
if (res == 0) {
assert(tracemalloc_traced_memory <= PY_SIZE_MAX - size);
tracemalloc_traced_memory += size;
@ -460,11 +527,16 @@ tracemalloc_add_trace(void *ptr, size_t size)
}
static void
tracemalloc_remove_trace(void *ptr)
tracemalloc_remove_trace(void *ptr, domain_t domain)
{
pointer_t key;
trace_t trace;
if (_Py_hashtable_pop(tracemalloc_traces, ptr, &trace, sizeof(trace))) {
key.ptr = ptr;
key.domain = domain;
POINTER_T_FILL_PADDING(key);
if (_Py_HASHTABLE_POP(tracemalloc_traces, key, trace)) {
assert(tracemalloc_traced_memory >= trace.size);
tracemalloc_traced_memory -= trace.size;
}
@ -486,7 +558,7 @@ tracemalloc_alloc(int use_calloc, void *ctx, size_t nelem, size_t elsize)
return NULL;
TABLES_LOCK();
if (tracemalloc_add_trace(ptr, nelem * elsize) < 0) {
if (tracemalloc_add_trace(ptr, 0, nelem * elsize) < 0) {
/* Failed to allocate a trace for the new memory block */
TABLES_UNLOCK();
alloc->free(alloc->ctx, ptr);
@ -510,9 +582,9 @@ tracemalloc_realloc(void *ctx, void *ptr, size_t new_size)
/* an existing memory block has been resized */
TABLES_LOCK();
tracemalloc_remove_trace(ptr);
tracemalloc_remove_trace(ptr, 0);
if (tracemalloc_add_trace(ptr2, new_size) < 0) {
if (tracemalloc_add_trace(ptr2, 0, new_size) < 0) {
/* Memory allocation failed. The error cannot be reported to
the caller, because realloc() may already have shrinked the
memory block and so removed bytes.
@ -530,7 +602,7 @@ tracemalloc_realloc(void *ctx, void *ptr, size_t new_size)
/* new allocation */
TABLES_LOCK();
if (tracemalloc_add_trace(ptr2, new_size) < 0) {
if (tracemalloc_add_trace(ptr2, 0, new_size) < 0) {
/* Failed to allocate a trace for the new memory block */
TABLES_UNLOCK();
alloc->free(alloc->ctx, ptr2);
@ -555,7 +627,7 @@ tracemalloc_free(void *ctx, void *ptr)
alloc->free(alloc->ctx, ptr);
TABLES_LOCK();
tracemalloc_remove_trace(ptr);
tracemalloc_remove_trace(ptr, 0);
TABLES_UNLOCK();
}
@ -610,7 +682,7 @@ tracemalloc_realloc_gil(void *ctx, void *ptr, size_t new_size)
ptr2 = alloc->realloc(alloc->ctx, ptr, new_size);
if (ptr2 != NULL && ptr != NULL) {
TABLES_LOCK();
tracemalloc_remove_trace(ptr);
tracemalloc_remove_trace(ptr, 0);
TABLES_UNLOCK();
}
return ptr2;
@ -689,7 +761,7 @@ tracemalloc_raw_realloc(void *ctx, void *ptr, size_t new_size)
if (ptr2 != NULL && ptr != NULL) {
TABLES_LOCK();
tracemalloc_remove_trace(ptr);
tracemalloc_remove_trace(ptr, 0);
TABLES_UNLOCK();
}
return ptr2;
@ -714,17 +786,27 @@ tracemalloc_raw_realloc(void *ctx, void *ptr, size_t new_size)
#endif /* TRACE_RAW_MALLOC */
static int
tracemalloc_clear_filename(_Py_hashtable_entry_t *entry, void *user_data)
tracemalloc_clear_filename(_Py_hashtable_t *ht, _Py_hashtable_entry_t *entry,
void *user_data)
{
PyObject *filename = (PyObject *)entry->key;
PyObject *filename;
assert(sizeof(filename) == ht->key_size);
filename = *(PyObject **)_Py_HASHTABLE_ENTRY_KEY(entry);
Py_DECREF(filename);
return 0;
}
static int
traceback_free_traceback(_Py_hashtable_entry_t *entry, void *user_data)
traceback_free_traceback(_Py_hashtable_t *ht, _Py_hashtable_entry_t *entry,
void *user_data)
{
traceback_t *traceback = (traceback_t *)entry->key;
traceback_t *traceback;
assert(sizeof(traceback) == ht->key_size);
traceback = *(traceback_t **)_Py_HASHTABLE_ENTRY_KEY(entry);
raw_free(traceback);
return 0;
}
@ -791,16 +873,16 @@ tracemalloc_init(void)
}
#endif
tracemalloc_filenames = hashtable_new(0,
(_Py_hashtable_hash_func)PyObject_Hash,
tracemalloc_filenames = hashtable_new(sizeof(PyObject *), 0,
hashtable_hash_pyobject,
hashtable_compare_unicode);
tracemalloc_tracebacks = hashtable_new(0,
(_Py_hashtable_hash_func)hashtable_hash_traceback,
(_Py_hashtable_compare_func)hashtable_compare_traceback);
tracemalloc_tracebacks = hashtable_new(sizeof(traceback_t *), 0,
hashtable_hash_traceback,
hashtable_compare_traceback);
tracemalloc_traces = hashtable_new(sizeof(trace_t),
_Py_hashtable_hash_ptr,
tracemalloc_traces = hashtable_new(sizeof(pointer_t), sizeof(trace_t),
hashtable_hash_pointer,
_Py_hashtable_compare_direct);
if (tracemalloc_filenames == NULL || tracemalloc_tracebacks == NULL
@ -1065,14 +1147,15 @@ typedef struct {
} get_traces_t;
static int
tracemalloc_get_traces_fill(_Py_hashtable_entry_t *entry, void *user_data)
tracemalloc_get_traces_fill(_Py_hashtable_t *traces, _Py_hashtable_entry_t *entry,
void *user_data)
{
get_traces_t *get_traces = user_data;
trace_t *trace;
PyObject *tracemalloc_obj;
int res;
trace = (trace_t *)_Py_HASHTABLE_ENTRY_DATA(entry);
trace = (trace_t *)_Py_HASHTABLE_ENTRY_DATA(traces, entry);
tracemalloc_obj = trace_to_pyobject(trace, get_traces->tracebacks);
if (tracemalloc_obj == NULL)
@ -1087,9 +1170,11 @@ tracemalloc_get_traces_fill(_Py_hashtable_entry_t *entry, void *user_data)
}
static int
tracemalloc_pyobject_decref_cb(_Py_hashtable_entry_t *entry, void *user_data)
tracemalloc_pyobject_decref_cb(_Py_hashtable_t *tracebacks,
_Py_hashtable_entry_t *entry,
void *user_data)
{
PyObject *obj = (PyObject *)_Py_HASHTABLE_ENTRY_DATA_AS_VOID_P(entry);
PyObject *obj = (PyObject *)_Py_HASHTABLE_ENTRY_DATA_AS_VOID_P(tracebacks, entry);
Py_DECREF(obj);
return 0;
}
@ -1120,7 +1205,7 @@ py_tracemalloc_get_traces(PyObject *self, PyObject *obj)
/* the traceback hash table is used temporarily to intern traceback tuple
of (filename, lineno) tuples */
get_traces.tracebacks = hashtable_new(sizeof(PyObject *),
get_traces.tracebacks = hashtable_new(sizeof(traceback_t *), sizeof(PyObject *),
_Py_hashtable_hash_ptr,
_Py_hashtable_compare_direct);
if (get_traces.tracebacks == NULL) {
@ -1152,7 +1237,7 @@ py_tracemalloc_get_traces(PyObject *self, PyObject *obj)
finally:
if (get_traces.tracebacks != NULL) {
_Py_hashtable_foreach(get_traces.tracebacks,
tracemalloc_pyobject_decref_cb, NULL);
tracemalloc_pyobject_decref_cb, NULL);
_Py_hashtable_destroy(get_traces.tracebacks);
}
if (get_traces.traces != NULL)
@ -1162,16 +1247,21 @@ py_tracemalloc_get_traces(PyObject *self, PyObject *obj)
}
static traceback_t*
tracemalloc_get_traceback(const void *ptr)
tracemalloc_get_traceback(const void *ptr, domain_t domain)
{
pointer_t key;
trace_t trace;
int found;
if (!tracemalloc_config.tracing)
return NULL;
key.ptr = (void *)ptr;
key.domain = domain;
POINTER_T_FILL_PADDING(key);
TABLES_LOCK();
found = _Py_HASHTABLE_GET(tracemalloc_traces, ptr, trace);
found = _Py_HASHTABLE_GET(tracemalloc_traces, key, trace);
TABLES_UNLOCK();
if (!found)
@ -1202,7 +1292,7 @@ py_tracemalloc_get_object_traceback(PyObject *self, PyObject *obj)
else
ptr = (void *)obj;
traceback = tracemalloc_get_traceback(ptr);
traceback = tracemalloc_get_traceback(ptr, 0);
if (traceback == NULL)
Py_RETURN_NONE;
@ -1229,7 +1319,7 @@ _PyMem_DumpTraceback(int fd, const void *ptr)
traceback_t *traceback;
int i;
traceback = tracemalloc_get_traceback(ptr);
traceback = tracemalloc_get_traceback(ptr, 0);
if (traceback == NULL)
return;

105
Modules/hashtable.c
View file

@ -59,7 +59,7 @@
#define ENTRY_NEXT(ENTRY) \
((_Py_hashtable_entry_t *)_Py_SLIST_ITEM_NEXT(ENTRY))
#define HASHTABLE_ITEM_SIZE(HT) \
(sizeof(_Py_hashtable_entry_t) + (HT)->data_size)
(sizeof(_Py_hashtable_entry_t) + (HT)->key_size + (HT)->data_size)
/* Forward declaration */
static void hashtable_rehash(_Py_hashtable_t *ht);
@ -88,21 +88,21 @@ _Py_slist_remove(_Py_slist_t *list, _Py_slist_item_t *previous,
}
Py_uhash_t
_Py_hashtable_hash_int(const void *key)
_Py_hashtable_hash_ptr(size_t key_size, const void *pkey)
{
return (Py_uhash_t)key;
}
void *key;
assert(key_size == sizeof(void *));
key = *(void**)pkey;
Py_uhash_t
_Py_hashtable_hash_ptr(const void *key)
{
return (Py_uhash_t)_Py_HashPointer((void *)key);
}
int
_Py_hashtable_compare_direct(const void *key, const _Py_hashtable_entry_t *entry)
_Py_hashtable_compare_direct(size_t key_size, const void *pkey,
const _Py_hashtable_entry_t *entry)
{
return entry->key == key;
return (memcmp(pkey, _Py_HASHTABLE_ENTRY_KEY(entry), key_size) == 0);
}
/* makes sure the real size of the buckets array is a power of 2 */
@ -119,7 +119,8 @@ round_size(size_t s)
}
_Py_hashtable_t *
_Py_hashtable_new_full(size_t data_size, size_t init_size,
_Py_hashtable_new_full(size_t key_size, size_t data_size,
size_t init_size,
_Py_hashtable_hash_func hash_func,
_Py_hashtable_compare_func compare_func,
_Py_hashtable_copy_data_func copy_data_func,
@ -144,6 +145,7 @@ _Py_hashtable_new_full(size_t data_size, size_t init_size,
ht->num_buckets = round_size(init_size);
ht->entries = 0;
ht->key_size = key_size;
ht->data_size = data_size;
buckets_size = ht->num_buckets * sizeof(ht->buckets[0]);
@ -164,11 +166,12 @@ _Py_hashtable_new_full(size_t data_size, size_t init_size,
}
_Py_hashtable_t *
_Py_hashtable_new(size_t data_size,
_Py_hashtable_new(size_t key_size, size_t data_size,
_Py_hashtable_hash_func hash_func,
_Py_hashtable_compare_func compare_func)
{
return _Py_hashtable_new_full(data_size, HASHTABLE_MIN_SIZE,
return _Py_hashtable_new_full(key_size, data_size,
HASHTABLE_MIN_SIZE,
hash_func, compare_func,
NULL, NULL, NULL, NULL);
}
@ -195,7 +198,7 @@ _Py_hashtable_size(_Py_hashtable_t *ht)
for (entry = TABLE_HEAD(ht, hv); entry; entry = ENTRY_NEXT(entry)) {
void *data;
data = _Py_HASHTABLE_ENTRY_DATA_AS_VOID_P(entry);
data = _Py_HASHTABLE_ENTRY_DATA_AS_VOID_P(ht, entry);
size += ht->get_data_size_func(data);
}
}
@ -245,17 +248,21 @@ _Py_hashtable_print_stats(_Py_hashtable_t *ht)
/* Get an entry. Return NULL if the key does not exist. */
_Py_hashtable_entry_t *
_Py_hashtable_get_entry(_Py_hashtable_t *ht, const void *key)
_Py_hashtable_get_entry(_Py_hashtable_t *ht,
size_t key_size, const void *pkey)
{
Py_uhash_t key_hash;
size_t index;
_Py_hashtable_entry_t *entry;
key_hash = ht->hash_func(key);
assert(key_size == ht->key_size);
key_hash = ht->hash_func(key_size, pkey);
index = key_hash & (ht->num_buckets - 1);
for (entry = TABLE_HEAD(ht, index); entry != NULL; entry = ENTRY_NEXT(entry)) {
if (entry->key_hash == key_hash && ht->compare_func(key, entry))
if (entry->key_hash == key_hash
&& ht->compare_func(key_size, pkey, entry))
break;
}
@ -263,18 +270,20 @@ _Py_hashtable_get_entry(_Py_hashtable_t *ht, const void *key)
}
static int
_hashtable_pop_entry(_Py_hashtable_t *ht, const void *key, void *data, size_t data_size)
_hashtable_pop_entry(_Py_hashtable_t *ht, size_t key_size, const void *pkey,
void *data, size_t data_size)
{
Py_uhash_t key_hash;
size_t index;
_Py_hashtable_entry_t *entry, *previous;
key_hash = ht->hash_func(key);
key_hash = ht->hash_func(key_size, pkey);
index = key_hash & (ht->num_buckets - 1);
previous = NULL;
for (entry = TABLE_HEAD(ht, index); entry != NULL; entry = ENTRY_NEXT(entry)) {
if (entry->key_hash == key_hash && ht->compare_func(key, entry))
if (entry->key_hash == key_hash
&& ht->compare_func(key_size, pkey, entry))
break;
previous = entry;
}
@ -298,8 +307,8 @@ _hashtable_pop_entry(_Py_hashtable_t *ht, const void *key, void *data, size_t da
/* Add a new entry to the hash. The key must not be present in the hash table.
Return 0 on success, -1 on memory error. */
int
_Py_hashtable_set(_Py_hashtable_t *ht, const void *key,
void *data, size_t data_size)
_Py_hashtable_set(_Py_hashtable_t *ht, size_t key_size, const void *pkey,
size_t data_size, void *data)
{
Py_uhash_t key_hash;
size_t index;
@ -310,11 +319,11 @@ _Py_hashtable_set(_Py_hashtable_t *ht, const void *key,
/* Don't write the assertion on a single line because it is interesting
to know the duplicated entry if the assertion failed. The entry can
be read using a debugger. */
entry = _Py_hashtable_get_entry(ht, key);
entry = _Py_hashtable_get_entry(ht, key_size, pkey);
assert(entry == NULL);
#endif
key_hash = ht->hash_func(key);
key_hash = ht->hash_func(key_size, pkey);
index = key_hash & (ht->num_buckets - 1);
entry = ht->alloc.malloc(HASHTABLE_ITEM_SIZE(ht));
@ -323,11 +332,11 @@ _Py_hashtable_set(_Py_hashtable_t *ht, const void *key,
return -1;
}
entry->key = (void *)key;
entry->key_hash = key_hash;
memcpy(_Py_HASHTABLE_ENTRY_KEY(entry), pkey, key_size);
assert(data_size == ht->data_size);
memcpy(_Py_HASHTABLE_ENTRY_DATA(entry), data, data_size);
memcpy(_Py_HASHTABLE_ENTRY_DATA(ht, entry), data, data_size);
_Py_slist_prepend(&ht->buckets[index], (_Py_slist_item_t*)entry);
ht->entries++;
@ -340,13 +349,14 @@ _Py_hashtable_set(_Py_hashtable_t *ht, const void *key,
/* Get data from an entry. Copy entry data into data and return 1 if the entry
exists, return 0 if the entry does not exist. */
int
_Py_hashtable_get(_Py_hashtable_t *ht, const void *key, void *data, size_t data_size)
_Py_hashtable_get(_Py_hashtable_t *ht, size_t key_size,const void *pkey,
size_t data_size, void *data)
{
_Py_hashtable_entry_t *entry;
assert(data != NULL);
entry = _Py_hashtable_get_entry(ht, key);
entry = _Py_hashtable_get_entry(ht, key_size, pkey);
if (entry == NULL)
return 0;
_Py_HASHTABLE_ENTRY_READ_DATA(ht, data, data_size, entry);
@ -354,22 +364,23 @@ _Py_hashtable_get(_Py_hashtable_t *ht, const void *key, void *data, size_t data_
}
int
_Py_hashtable_pop(_Py_hashtable_t *ht, const void *key, void *data, size_t data_size)
_Py_hashtable_pop(_Py_hashtable_t *ht, size_t key_size, const void *pkey,
size_t data_size, void *data)
{
assert(data != NULL);
assert(ht->free_data_func == NULL);
return _hashtable_pop_entry(ht, key, data, data_size);
return _hashtable_pop_entry(ht, key_size, pkey, data, data_size);
}
/* Delete an entry. The entry must exist. */
void
_Py_hashtable_delete(_Py_hashtable_t *ht, const void *key)
_Py_hashtable_delete(_Py_hashtable_t *ht, size_t key_size, const void *pkey)
{
#ifndef NDEBUG
int found = _hashtable_pop_entry(ht, key, NULL, 0);
int found = _hashtable_pop_entry(ht, key_size, pkey, NULL, 0);
assert(found);
#else
(void)_hashtable_pop_entry(ht, key, NULL, 0);
(void)_hashtable_pop_entry(ht, key_size, pkey, NULL, 0);
#endif
}
@ -378,7 +389,7 @@ _Py_hashtable_delete(_Py_hashtable_t *ht, const void *key)
stops if a non-zero value is returned. */
int
_Py_hashtable_foreach(_Py_hashtable_t *ht,
int (*func) (_Py_hashtable_entry_t *entry, void *arg),
_Py_hashtable_foreach_func func,
void *arg)
{
_Py_hashtable_entry_t *entry;
@ -386,7 +397,7 @@ _Py_hashtable_foreach(_Py_hashtable_t *ht,
for (hv = 0; hv < ht->num_buckets; hv++) {
for (entry = TABLE_HEAD(ht, hv); entry; entry = ENTRY_NEXT(entry)) {
int res = func(entry, arg);
int res = func(ht, entry, arg);
if (res)
return res;
}
@ -397,6 +408,7 @@ _Py_hashtable_foreach(_Py_hashtable_t *ht,
static void
hashtable_rehash(_Py_hashtable_t *ht)
{
const size_t key_size = ht->key_size;
size_t buckets_size, new_size, bucket;
_Py_slist_t *old_buckets = NULL;
size_t old_num_buckets;
@ -425,7 +437,8 @@ hashtable_rehash(_Py_hashtable_t *ht)
for (entry = BUCKETS_HEAD(old_buckets[bucket]); entry != NULL; entry = next) {
size_t entry_index;
assert(ht->hash_func(entry->key) == entry->key_hash);
assert(ht->hash_func(key_size, _Py_HASHTABLE_ENTRY_KEY(entry)) == entry->key_hash);
next = ENTRY_NEXT(entry);
entry_index = entry->key_hash & (new_size - 1);
@ -446,7 +459,7 @@ _Py_hashtable_clear(_Py_hashtable_t *ht)
for (entry = TABLE_HEAD(ht, i); entry != NULL; entry = next) {
next = ENTRY_NEXT(entry);
if (ht->free_data_func)
ht->free_data_func(_Py_HASHTABLE_ENTRY_DATA_AS_VOID_P(entry));
ht->free_data_func(_Py_HASHTABLE_ENTRY_DATA_AS_VOID_P(ht, entry));
ht->alloc.free(entry);
}
_Py_slist_init(&ht->buckets[i]);
@ -465,7 +478,7 @@ _Py_hashtable_destroy(_Py_hashtable_t *ht)
while (entry) {
_Py_slist_item_t *entry_next = entry->next;
if (ht->free_data_func)
ht->free_data_func(_Py_HASHTABLE_ENTRY_DATA_AS_VOID_P(entry));
ht->free_data_func(_Py_HASHTABLE_ENTRY_DATA_AS_VOID_P(ht, entry));
ht->alloc.free(entry);
entry = entry_next;
}
@ -479,13 +492,16 @@ _Py_hashtable_destroy(_Py_hashtable_t *ht)
_Py_hashtable_t *
_Py_hashtable_copy(_Py_hashtable_t *src)
{
const size_t key_size = src->key_size;
const size_t data_size = src->data_size;
_Py_hashtable_t *dst;
_Py_hashtable_entry_t *entry;
size_t bucket;
int err;
void *data, *new_data;
dst = _Py_hashtable_new_full(src->data_size, src->num_buckets,
dst = _Py_hashtable_new_full(key_size, data_size,
src->num_buckets,
src->hash_func, src->compare_func,
src->copy_data_func, src->free_data_func,
src->get_data_size_func, &src->alloc);
@ -496,17 +512,20 @@ _Py_hashtable_copy(_Py_hashtable_t *src)
entry = TABLE_HEAD(src, bucket);
for (; entry; entry = ENTRY_NEXT(entry)) {
if (src->copy_data_func) {
data = _Py_HASHTABLE_ENTRY_DATA_AS_VOID_P(entry);
data = _Py_HASHTABLE_ENTRY_DATA_AS_VOID_P(src, entry);
new_data = src->copy_data_func(data);
if (new_data != NULL)
err = _Py_hashtable_set(dst, entry->key,
&new_data, src->data_size);
err = _Py_hashtable_set(dst, key_size,
_Py_HASHTABLE_ENTRY_KEY(entry),
data_size, &new_data);
else
err = 1;
}
else {
data = _Py_HASHTABLE_ENTRY_DATA(entry);
err = _Py_hashtable_set(dst, entry->key, data, src->data_size);
data = _Py_HASHTABLE_ENTRY_DATA(src, entry);
err = _Py_hashtable_set(dst, key_size,
_Py_HASHTABLE_ENTRY_KEY(entry),
data_size, data);
}
if (err) {
_Py_hashtable_destroy(dst);

89
Modules/hashtable.h
View file

@ -20,26 +20,31 @@ typedef struct {
/* used by _Py_hashtable_t.buckets to link entries */
_Py_slist_item_t _Py_slist_item;
const void *key;
Py_uhash_t key_hash;
/* data follows */
} _Py_hashtable_entry_t;
#define _Py_HASHTABLE_ENTRY_DATA(ENTRY) \
((char *)(ENTRY) + sizeof(_Py_hashtable_entry_t))
#define _Py_HASHTABLE_ENTRY_KEY(ENTRY) \
((void *)((char *)(ENTRY) + sizeof(_Py_hashtable_entry_t)))
#define _Py_HASHTABLE_ENTRY_DATA_AS_VOID_P(ENTRY) \
(*(void **)_Py_HASHTABLE_ENTRY_DATA(ENTRY))
#define _Py_HASHTABLE_ENTRY_DATA(TABLE, ENTRY) \
((char *)(ENTRY) + sizeof(_Py_hashtable_entry_t) + (TABLE)->key_size)
#define _Py_HASHTABLE_ENTRY_DATA_AS_VOID_P(TABLE, ENTRY) \
(*(void **)_Py_HASHTABLE_ENTRY_DATA(TABLE, ENTRY))
#define _Py_HASHTABLE_ENTRY_READ_DATA(TABLE, DATA, DATA_SIZE, ENTRY) \
do { \
assert((DATA_SIZE) == (TABLE)->data_size); \
memcpy(DATA, _Py_HASHTABLE_ENTRY_DATA(ENTRY), DATA_SIZE); \
memcpy(DATA, _Py_HASHTABLE_ENTRY_DATA(TABLE, ENTRY), DATA_SIZE); \
} while (0)
typedef Py_uhash_t (*_Py_hashtable_hash_func) (const void *key);
typedef int (*_Py_hashtable_compare_func) (const void *key, const _Py_hashtable_entry_t *he);
typedef Py_uhash_t (*_Py_hashtable_hash_func) (size_t key_size,
const void *pkey);
typedef int (*_Py_hashtable_compare_func) (size_t key_size,
const void *pkey,
const _Py_hashtable_entry_t *he);
typedef void* (*_Py_hashtable_copy_data_func)(void *data);
typedef void (*_Py_hashtable_free_data_func)(void *data);
typedef size_t (*_Py_hashtable_get_data_size_func)(void *data);
@ -56,6 +61,7 @@ typedef struct {
size_t num_buckets;
size_t entries; /* Total number of entries in the table. */
_Py_slist_t *buckets;
size_t key_size;
size_t data_size;
_Py_hashtable_hash_func hash_func;
@ -67,15 +73,21 @@ typedef struct {
} _Py_hashtable_t;
/* hash and compare functions for integers and pointers */
PyAPI_FUNC(Py_uhash_t) _Py_hashtable_hash_ptr(const void *key);
PyAPI_FUNC(Py_uhash_t) _Py_hashtable_hash_int(const void *key);
PyAPI_FUNC(int) _Py_hashtable_compare_direct(const void *key, const _Py_hashtable_entry_t *entry);
PyAPI_FUNC(Py_uhash_t) _Py_hashtable_hash_ptr(
size_t key_size,
const void *pkey);
PyAPI_FUNC(int) _Py_hashtable_compare_direct(
size_t key_size,
const void *pkey,
const _Py_hashtable_entry_t *entry);
PyAPI_FUNC(_Py_hashtable_t *) _Py_hashtable_new(
size_t key_size,
size_t data_size,
_Py_hashtable_hash_func hash_func,
_Py_hashtable_compare_func compare_func);
PyAPI_FUNC(_Py_hashtable_t *) _Py_hashtable_new_full(
size_t key_size,
size_t data_size,
size_t init_size,
_Py_hashtable_hash_func hash_func,
@ -88,40 +100,65 @@ PyAPI_FUNC(_Py_hashtable_t *) _Py_hashtable_copy(_Py_hashtable_t *src);
PyAPI_FUNC(void) _Py_hashtable_clear(_Py_hashtable_t *ht);
PyAPI_FUNC(void) _Py_hashtable_destroy(_Py_hashtable_t *ht);
typedef int (*_Py_hashtable_foreach_func) (_Py_hashtable_entry_t *entry, void *arg);
typedef int (*_Py_hashtable_foreach_func) (_Py_hashtable_t *ht,
_Py_hashtable_entry_t *entry,
void *arg);
PyAPI_FUNC(int) _Py_hashtable_foreach(
_Py_hashtable_t *ht,
_Py_hashtable_foreach_func func, void *arg);
_Py_hashtable_foreach_func func,
void *arg);
PyAPI_FUNC(size_t) _Py_hashtable_size(_Py_hashtable_t *ht);
PyAPI_FUNC(_Py_hashtable_entry_t*) _Py_hashtable_get_entry(
_Py_hashtable_t *ht,
const void *key);
size_t key_size,
const void *pkey);
/* Don't call directly this function,
but use _Py_HASHTABLE_SET() and _Py_HASHTABLE_SET_NODATA() macros */
PyAPI_FUNC(int) _Py_hashtable_set(
_Py_hashtable_t *ht,
const void *key,
void *data,
size_t data_size);
size_t key_size,
const void *pkey,
size_t data_size,
void *data);
/* Don't call directly this function, but use _Py_HASHTABLE_GET() macro */
PyAPI_FUNC(int) _Py_hashtable_get(
_Py_hashtable_t *ht,
const void *key,
void *data,
size_t data_size);
size_t key_size,
const void *pkey,
size_t data_size,
void *data);
/* Don't call directly this function, but use _Py_HASHTABLE_POP() macro */
PyAPI_FUNC(int) _Py_hashtable_pop(
_Py_hashtable_t *ht,
const void *key,
void *data,
size_t data_size);
size_t key_size,
const void *pkey,
size_t data_size,
void *data);
PyAPI_FUNC(void) _Py_hashtable_delete(
_Py_hashtable_t *ht,
const void *key);
size_t key_size,
const void *pkey);
#define _Py_HASHTABLE_SET(TABLE, KEY, DATA) \
_Py_hashtable_set(TABLE, KEY, &(DATA), sizeof(DATA))
_Py_hashtable_set(TABLE, sizeof(KEY), &KEY, sizeof(DATA), &(DATA))
#define _Py_HASHTABLE_SET_NODATA(TABLE, KEY) \
_Py_hashtable_set(TABLE, sizeof(KEY), &KEY, 0, NULL)
#define _Py_HASHTABLE_GET_ENTRY(TABLE, KEY) \
_Py_hashtable_get_entry(TABLE, sizeof(KEY), &(KEY))
#define _Py_HASHTABLE_GET(TABLE, KEY, DATA) \
_Py_hashtable_get(TABLE, KEY, &(DATA), sizeof(DATA))
_Py_hashtable_get(TABLE, sizeof(KEY), &(KEY), sizeof(DATA), &(DATA))
#define _Py_HASHTABLE_POP(TABLE, KEY, DATA) \
_Py_hashtable_pop(TABLE, sizeof(KEY), &(KEY), sizeof(DATA), &(DATA))
#endif /* Py_LIMITED_API */

11
Python/marshal.c
View file

@ -263,7 +263,7 @@ w_ref(PyObject *v, char *flag, WFILE *p)
if (Py_REFCNT(v) == 1)
return 0;
entry = _Py_hashtable_get_entry(p->hashtable, v);
entry = _Py_HASHTABLE_GET_ENTRY(p->hashtable, v);
if (entry != NULL) {
/* write the reference index to the stream */
_Py_HASHTABLE_ENTRY_READ_DATA(p->hashtable, &w, sizeof(w), entry);
@ -571,7 +571,8 @@ static int
w_init_refs(WFILE *wf, int version)
{
if (version >= 3) {
wf->hashtable = _Py_hashtable_new(sizeof(int), _Py_hashtable_hash_ptr,
wf->hashtable = _Py_hashtable_new(sizeof(void *), sizeof(int),
_Py_hashtable_hash_ptr,
_Py_hashtable_compare_direct);
if (wf->hashtable == NULL) {
PyErr_NoMemory();
@ -582,9 +583,11 @@ w_init_refs(WFILE *wf, int version)
}
static int
w_decref_entry(_Py_hashtable_entry_t *entry, void *Py_UNUSED(data))
w_decref_entry(_Py_hashtable_t *ht, _Py_hashtable_entry_t *entry, void *Py_UNUSED(data))
{
Py_XDECREF(entry->key);
void *entry_key = *(void **)_Py_HASHTABLE_ENTRY_KEY(entry);
assert(ht->key_size == sizeof(entry_key));
Py_XDECREF(entry_key);
return 0;
}