xiaoqizhan commented on code in PR #18468:
URL: https://github.com/apache/nuttx/pull/18468#discussion_r2871469583
##########
include/malloc.h:
##########
@@ -35,6 +35,9 @@
/* Special PID to query the info about alloc, free and mempool */
+#if CONFIG_MM_BACKTRACE >= 0
Review Comment:
@xiaoxiang781216 Because when recording the allocation information of each
memory node, it is mandatory to enable CONFIG_MM_BACKTRACE >= 0. As shown in
the following data structure definition, only in this way will the PID
information of the calling thread be saved each time memory is allocated.
```
struct mm_allocnode_s
{
mmsize_t preceding; /* Physical preceding chunk size
*/
mmsize_t size; /* Size of this chunk */
#if CONFIG_MM_BACKTRACE >= 0
pid_t pid; /* The pid for caller */
unsigned long seqno; /* The sequence of memory malloc
*/
# if CONFIG_MM_BACKTRACE > 0
FAR void *backtrace[CONFIG_MM_BACKTRACE]; /* The backtrace buffer for
caller */
# endif
#endif
};
```
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