Add a malloc()-traffic log that records all malloc()-related calls with
their addresses, sizes, and caller information. This is useful for
debugging allocation patterns and finding the source of allocations that
lack caller info in heap dumps.
Each entry stores:
- Operation type (alloc/free/realloc/memalign)
- Pointer address
- Size (and old size for realloc)
- Full caller backtrace string
On sandbox, the log buffer is allocated from host memory using
os_malloc(), so it does not affect U-Boot's heap. The size is
controlled by CONFIG_MCHECK_LOG_SIZE (default 512K entries).
If the log fills up, it wraps around (circular buffer) and a warning
is shown when dumping to indicate how many entries were lost.
Co-developed-by: Claude <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>
1d0df266dc