null check

README.md

@@ -1,4 +1,6 @@
 # Peekaboo
+[![deepcode](https://www.deepcode.ai/api/gh/badge?key=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJwbGF0Zm9ybTEiOiJnaCIsIm93bmVyMSI6Im1lbHlueCIsInJlcG8xIjoicGVla2Fib28iLCJpbmNsdWRlTGludCI6ZmFsc2UsImF1dGhvcklkIjoyNDY3OSwiaWF0IjoxNjA0OTI1NjI0fQ.YSBSFLNaSRmg13ZSL4QDfpDUXTbf5umrrKcCyztJ2PE)](https://www.deepcode.ai/app/gh/melynx/peekaboo/_/dashboard?utm_content=gh%2Fmelynx%2Fpeekaboo)
+
 Peekaboo is an attempt to provide an easily extensible and usable dynamic trace
 format. Peekaboo provides definitions for typical properties expected for
 dynamic traces like instruction addresses, memory operand info, register info,

libpeekaboo/libpeekaboo.c

@@ -100,7 +100,7 @@ peekaboo_trace_t *create_trace(char *name)
 
 	trace_ptr = (peekaboo_trace_t *)malloc(sizeof(peekaboo_trace_t));
 	if (!trace_ptr) PEEKABOO_DIE("libpeekaboo: Unable to malloc trace instance.\n");
-	
+
 	create_trace_file(dir_path, "insn.trace", MAX_PATH, &trace_ptr->insn_trace);
 	create_trace_file(dir_path, "regfile", MAX_PATH, &trace_ptr->regfile);
 	create_trace_file(dir_path, "memfile", MAX_PATH, &trace_ptr->memfile);
@@ -242,6 +242,7 @@ void load_memrefs_offsets(char *dir_path, peekaboo_trace_t *trace)
 		if (base_offset!=0) fprintf(stderr, "libpeekaboo: (Trace from a child thread/process?) Re-align the memory offset, starting from %ld.\n", base_offset/sizeof(memfile_t));
 
 		FILE *memrefs_offsets = fopen(path, "wb");
+		if (!memrefs_offsets) PEEKABOO_DIE("libpeekaboo: Fail to open memref file!\n");
 
 		memref_t buffer[1024];
 		size_t write_buffer[1024];