refactor: replace sprintf with snprintf for safer string handling in dump functions (ggml-org#16913)

Author: chraac

ggml/src/ggml-hexagon/htp/ops-utils.h

@@ -43,46 +43,46 @@ static inline int32_t htp_is_one_chunk(void * addr, uint32_t n, uint32_t chunk_s
 }
 
 static inline void htp_dump_int8_line(char * pref, const int8_t * x, int n) {
-    char str[1024], *p = str;
-    p += sprintf(p, "%s: ", pref);
-    for (int i = 0; i < 16; i++) {
-        p += sprintf(p, "%d, ", x[i]);
+    char str[1024], *p = str, *p_end = str + sizeof(str);
+    p += snprintf(p, p_end - p, "%s: ", pref);
+    for (int i = 0; i < n && p < p_end; i++) {
+        p += snprintf(p, p_end - p, "%d, ", x[i]);
     }
     FARF(HIGH, "%s\n", str);
 }
 
 static inline void htp_dump_uint8_line(char * pref, const uint8_t * x, uint32_t n) {
-    char str[1024], *p = str;
-    p += sprintf(p, "%s: ", pref);
-    for (int i = 0; i < n; i++) {
-        p += sprintf(p, "%d, ", x[i]);
+    char str[1024], *p = str, *p_end = str + sizeof(str);
+    p += snprintf(p, p_end - p, "%s: ", pref);
+    for (int i = 0; i < n && p < p_end; i++) {
+        p += snprintf(p, p_end - p, "%d, ", x[i]);
     }
     FARF(HIGH, "%s\n", str);
 }
 
 static inline void htp_dump_int32_line(char * pref, const int32_t * x, uint32_t n) {
-    char str[1024], *p = str;
-    p += sprintf(p, "%s: ", pref);
+    char str[1024], *p = str, *p_end = str + sizeof(str);
+    p += snprintf(p, p_end - p, "%s: ", pref);
     for (int i = 0; i < n; i++) {
-        p += sprintf(p, "%d, ", (int) x[i]);
+        p += snprintf(p, p_end - p, "%d, ", (int) x[i]);
     }
     FARF(HIGH, "%s\n", str);
 }
 
 static inline void htp_dump_fp16_line(char * pref, const __fp16 * x, uint32_t n) {
-    char str[1024], *p = str;
-    p += sprintf(p, "%s: ", pref);
+    char str[1024], *p = str, *p_end = str + sizeof(str);
+    p += snprintf(p, p_end - p, "%s: ", pref);
     for (int i = 0; i < n; i++) {
-        p += sprintf(p, "%.6f, ", (float) x[i]);
+        p += snprintf(p, p_end - p, "%.6f, ", (float) x[i]);
     }
     FARF(HIGH, "%s\n", str);
 }
 
 static inline void htp_dump_fp32_line(char * pref, const float * x, uint32_t n) {
-    char str[1024], *p = str;
-    p += sprintf(p, "%s: ", pref);
+    char str[1024], *p = str, *p_end = str + sizeof(str);
+    p += snprintf(p, p_end - p, "%s: ", pref);
     for (int i = 0; i < n; i++) {
-        p += sprintf(p, "%.6f, ", x[i]);
+        p += snprintf(p, p_end - p, "%.6f, ", x[i]);
     }
     FARF(HIGH, "%s\n", str);
 }