Gdb can go into some opencv function, but cannot go into some other opencv functions
I want to debug Opencv with gdb under opensuse 13.1:
I can enter into a function, for example imshow
, waitKey
but I can not join the others, such as imread
, namedWindow
it shows:
29 image = cv::imread(name);
(gdb) s
std::allocator<char>::allocator (this=0x7fffffffdc7f)
at /usr/src/debug/gcc-4.8.1-20130909/obj-x86_64-suse-linux/x86_64-suse-linux/libstdc++-v3/include/bits/allocator.h:113
113 allocator() throw() { }
here are my steps:
test4.cpp:
#include <stdio.h>
#include <opencv2/opencv.hpp>
using namespace cv;
int main(int argc, char** argv )
{
Mat image;
image = imread( "LinuxLogo.jpg", 1 );
if ( !image.data )
{
printf("No image data \n");
return -1;
}
namedWindow("Display Image", CV_WINDOW_AUTOSIZE );
imshow("Display Image", image);
waitKey(0);
return 0;
}
my makefile:
OpencvDebugLibDir=/home/ry/lib
CFLAGS=-g -I$(OpencvDebugLibDir)/include/opencv -I$(OpencvDebugLibDir)
LIBS=$(OpencvDebugLibDir)/lib
test4:test4.cpp
g++ $(CFLAGS) -o $@ $< -L$(LIBS) -lopencv_highgui -lopencv_core -Wl,-rpath=/home/ry/lib/lib
run gdb:
gdb test4 -d /home/ry/learn/opencv/install/OpenCV/opencv-2.4.9/modules/core/src -d /home/ry/learn/opencv/install/OpenCV/opencv-2.4.9/modules/highgui/src
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You should finish
and step
again at the gdb prompt.
This is because the first time you enter, you step into the constructor code std::string
(this is the first parameter imread
). This is not what you want, so just end this current frame again. Note that this process can occur multiple times in the same line of code, depending on the function arguments and how they are passed.
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