【CV項目源碼實作】Floating point exception (core dumped)

前言

cmd

./darknet detector demo cfg/tfl.data cfg/yolov3-tiny-tfl.cfg backup/yolov3-tiny-tfl_500000.weights data/tfl.avi      

error

Floating point exception (core dumped)      

avg_predictions(demo.c) ---> get_network_boxes(src/network.c) ----> fill_network_boxes(src/network.c) ----> get_yolo_detections(src/yolo_layer.c)----> correct_yolo_boxes(src/yolo_layer.c)

解決方法

使用gdb進行調試定位問題在orrect_yolo_boxes函數；

vi Makefile 
set DEBUG = 1
make -j8 # 重新編譯
gdb ./darknet
# set args detect cfg/yolov3-tiny.cfg yolov3-tiny.weights data/dog.jpg 
set args detector demo cfg/coco.data cfg/yolov3.cfg yolov3.weights test.mp4
r # 程式運作到crash      

output

Thread 7269 "darknet" received signal SIGFPE, Arithmetic exception.
[Switching to Thread 0x7ffefa91d000 (LWP 2491245)]
0x00005555555e96c9 in correct_yolo_boxes (dets=0x7ffdfc000c60, n=0, w=0, h=0, netw=416, neth=416, relative=1) at ./src/yolo_layer.c:257
257                new_w = (w      

原因分析

經過"排查過程"，發現最終原因是src/yolo_layer.c檔案中的correct_yolo_boxes函數發生了分母為0的除法，導緻crash；

new_w = (w*neth)/h;      

在correct_yolo_boxes函數最開始添加一條語句

if( 0==w || 0==h) return;