http://savannah.gnu.org/projects/cflow
http://tinylab.org/linux-0.11-lab/
http://ftp.gnu.org/gnu/cflow/
https://github.com/tinyclub
http://www.tinylab.org/callgraph-draw-the-calltree-of-c-functions/
1.cflow版本: //Calltree 不更新了，CFLOW还在更新中 ./configure make make install Version 1.5 available posted by gray, Mon 16 May 2016 09:39:12 PM UTC - 0 repliesGNU cflow version 1.5 is available for download.Changes in this release: Correctly handle functions returning struct/union (fixes bug #31792) Gracefully handle invalid inputs (fixes bug #44113) Debugging output goes to stderr Add a manpage Consistent use of exit codesVersion 1.4 released posted by gray, Tue 11 Oct 2011 09:08:54 PM UTC - 0 repliesGNU cflow version 1.4 is available for download.The most important changes in this version are: Symbol aliases New syntactic class: qualifiers Speed up recursive call detection. Fix parsing of typedefs after struct. Fix the output of branch marks in tree mode. Fix processing of static inline functions (RH bug 650716). 2.yum install graphviz //得到dot 3.yum install gawk 4.tree2dotx (脚本,和gprof2dot.py一样）转换 .DOT图形格式 wget -c https://github.com/tinyclub/linux-0.11-lab/raw/master/tools/tree2dotx
callgraph = cflow + tree2dotx + dot （callgraph自动化这个三个工具)
1.cflow：拿到函数调用关系 (calltree可以互换cflow)
cflow -b -m start_kernel init/main.c > start_kernel.txt
2.tree2dotx: 把函数调用树转换成 dot 格式
cat start_kernel.txt | tree2dotx > start_kernel.dot
3.用 dot 工具生成可以渲染的图片格式
这里仅以 svg 格式为例：
$ cat start_kernel.dot | dot -Tsvg -o start_kernel.svg
[root@server1 l#git clone https://github.com/tinyclub/linux-0.11-lab.git && cd linux-0.11-lab [root@server1 l#cd tool [root@server1 l#cp tree2dotx callgraph /usr/local/bin [root@server1 l#chmod +x /usr/local/bin/{tree2dotx,callgraph} [root@server1 linux-0.11-lab]# make cg f=main //Makefile.callgraph Func: mainMatch: 3File: 1 ./init/main.c: * main() use the stack at all after fork(). Thus, no function 2 ./init/main.c: * won't be any messing with the stack from main(), but we define 3 ./init/main.c:void main(void) /* This really IS void, no error here. */Select: 1 ~ 3 ? 3File: ./init/main.cCommand: cflow -b -m main ./init/main.c | /root/soft/linux-0.11-lab/tools//tree2dotx 2>/dev/null | dot -Tsvg -o /root/soft/linux-0.11-lab/tools//../callgraph/main.__init_main_c.svgcflow:./init/main.c:104: drive_info redefinedcflow:./init/main.c:104: this is the place of previous definitionTarget: ./init/main.c: main -> /root/soft/linux-0.11-lab/tools//../callgraph/main.__init_main_c.svgwhich: no chromium-browser in (/usr/local/mysql/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin) 图像生成: [root@server1 callgraph]# pwd /root/soft/linux-0.11-lab/callgraph [root@server1 callgraph]# ll total 28 -rw-r--r-- 1 root root 22196 Jun 8 15:48 main.__init_main_c.svg -rw-r--r-- 1 root root 34 Jun 8 15:45 Makefile 