--- a/common/dlmalloc.c	2022-12-06 11:26:57.000000000 +0900
+++ b/common/dlmalloc.c	2023-09-05 17:58:21.916249216 +0900
@@ -611,15 +611,20 @@
 	mem_malloc_brk = start;
 
 #ifdef CONFIG_SYS_MALLOC_DEFAULT_TO_INIT
+	printf("mem_malloc_init 1.\n");
 	malloc_init();
 #endif
 
+	printf("mem_malloc_init 2.\n");
 	debug("using memory %#lx-%#lx for malloc()\n", mem_malloc_start,
 	      mem_malloc_end);
 #ifdef CONFIG_SYS_MALLOC_CLEAR_ON_INIT
+	printf("mem_malloc_init 3. mem_malloc_start = 0x%lx size = 0x%lx\n",mem_malloc_start,size);
 	memset((void *)mem_malloc_start, 0x0, size);
 #endif
+	printf("mem_malloc_init 4.\n");
 	malloc_bin_reloc();
+	printf("mem_malloc_init 5.\n");
 }
 
 /* field-extraction macros */