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Issue #19741: tracemalloc: report tracemalloc_log_alloc() failure to the caller 

for new allocations, but not when a memory block was already resized
This commit is contained in:
Victor Stinner 2013-11-24 11:37:15 +01:00
parent c49477b184
commit 52968676f1
1 changed files with 29 additions and 18 deletions
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47
Modules/_tracemalloc.c
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@ -436,40 +436,35 @@ traceback_new(void)
return traceback;
}
static void
static int
tracemalloc_log_alloc(void *ptr, size_t size)
{
traceback_t *traceback;
trace_t trace;
int res;
#ifdef WITH_THREAD
assert(PyGILState_Check());
#endif
traceback = traceback_new();
if (traceback == NULL) {
/* Memory allocation failed. The error cannot be reported to the
caller, because realloc() may already have shrink the memory block
and so removed bytes. */
return;
}
if (traceback == NULL)
return -1;
trace.size = size;
trace.traceback = traceback;
TABLES_LOCK();
if (_Py_HASHTABLE_SET(tracemalloc_traces, ptr, trace) == 0) {
res = _Py_HASHTABLE_SET(tracemalloc_traces, ptr, trace);
if (res == 0) {
assert(tracemalloc_traced_memory <= PY_SIZE_MAX - size);
tracemalloc_traced_memory += size;
if (tracemalloc_traced_memory > tracemalloc_max_traced_memory)
tracemalloc_max_traced_memory = tracemalloc_traced_memory;
}
else {
/* Hashtabled failed to add a new entry because of a memory allocation
failure. Same than above, the error cannot be reported to the
caller. */
}
TABLES_UNLOCK();
return res;
}
static void
@ -512,10 +507,15 @@ tracemalloc_malloc(void *ctx, size_t size, int gil_held)
#endif
#endif
ptr = alloc->malloc(alloc->ctx, size);
set_reentrant(0);
if (ptr != NULL)
tracemalloc_log_alloc(ptr, size);
if (ptr != NULL) {
if (tracemalloc_log_alloc(ptr, size) < 0) {
/* Memory allocation failed */
alloc->free(alloc->ctx, ptr);
ptr = NULL;
}
}
set_reentrant(0);
#if defined(TRACE_RAW_MALLOC) && defined(WITH_THREAD)
if (!gil_held)
@ -561,14 +561,25 @@ tracemalloc_realloc(void *ctx, void *ptr, size_t new_size, int gil_held)
#endif
#endif
ptr2 = alloc->realloc(alloc->ctx, ptr, new_size);
set_reentrant(0);
if (ptr2 != NULL) {
if (ptr != NULL)
tracemalloc_log_free(ptr);
tracemalloc_log_alloc(ptr2, new_size);
if (tracemalloc_log_alloc(ptr2, new_size) < 0) {
if (ptr == NULL) {
/* Memory allocation failed */
alloc->free(alloc->ctx, ptr2);
ptr2 = NULL;
}
else {
/* Memory allocation failed. The error cannot be reported to
the caller, because realloc() may already have shrinked the
memory block and so removed bytes. */
}
}
}
set_reentrant(0);
#if defined(TRACE_RAW_MALLOC) && defined(WITH_THREAD)
if (!gil_held)