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malloc: Add function to dump the malloc()-traffic log

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Add malloc_log_dump() to print all recorded malloc/free/realloc calls
with their addresses, sizes, and caller information. This provides a
way to inspect the log after recording.

The dump shows a summary line with entry counts, followed by a table
with sequence number, operation type, pointer, size, and caller for
each recorded operation.

Co-developed-by: Claude <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>
This commit is contained in:
Simon Glass
2026-01-02 11:07:06 -07:00
parent 1d0df266dc
commit 1390d243bc
3 changed files with 119 additions and 0 deletions
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41
test/common/malloc.c
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@@ -688,4 +688,45 @@ static int common_test_malloc_log_info(struct unit_test_state *uts)
return 0;
}
COMMON_TEST(common_test_malloc_log_info, 0);
/* Test malloc_log_dump() */
static int common_test_malloc_log_dump(struct unit_test_state *uts)
{
struct mlog_info info;
void *ptr, *ptr2;
malloc_log_start();
/* Do an allocation, realloc, and free */
ptr = malloc(0x100);
ut_assertnonnull(ptr);
ptr2 = realloc(ptr, 0x200);
ut_assertnonnull(ptr2);
free(ptr2);
malloc_log_stop();
ut_assertok(malloc_log_info(&info));
console_record_reset_enable();
malloc_log_dump();
ut_assert_nextline("Malloc log: 3 entries (max %u, total 3)",
info.max_entries);
ut_assert_nextline("%4s %-8s %10s %8s %s", "Seq", "Type", "Address",
"Size", "Caller");
ut_assert_nextline("---- -------- ---------- -------- ------");
ut_assert_nextlinen(" 0 alloc %10lx 100",
(ulong)map_to_sysmem(ptr));
ut_assert_nextlinen(" 1 realloc %10lx 200 (was 100)",
(ulong)map_to_sysmem(ptr2));
ut_assert_nextlinen(" 2 free %10lx 0",
(ulong)map_to_sysmem(ptr2));
ut_assert_console_end();
return 0;
}
COMMON_TEST(common_test_malloc_log_dump, 0);
#endif /* MCHECK_LOG */