Question: Question:
I am currently analyzing past software, but is there an application that lists function calls?
I made a call graph with doxygen, but it's too complicated to document.
I want to output with csv etc. (I hope it can be listed not only for csv)
fooa-> fob-> foc1
-> foc2
If it was a call
fooa, foob, foc1
,, foc2
I'm looking for software that outputs like Please tell me
Answer: Answer:
As mentioned in user29553's comment, I think cflow is good.
I tried to format the result into CSV.
[Example of formatting by awk (call_stack.sh)]
#!/bin/bash
while read file; do cflow ${file}; done | sed '
s/ /\t/g
s/) /)\t/
' | awk -F '\t' '
BEGIN{
##DELIMITER = "->"
DELIMITER = ","
}
{
num = NF;
for(no = 1; no <= num; no++){
if($no != ""){
if(!match($no, "^<")){
ga[no] = $no
}
else{
if(match($no, "recursive:")){
ga[no-1] = ga[no-1] "*";
}
delete ga[no];
num -= 1;
}
}
}
dlmt = ""
call_stack = "";
for(no = 1; no <= num; no++){
call_stack = call_stack dlmt ga[no]
dlmt = DELIMITER
}
printf("%s\n", call_stack);
}
'
[How to use]
find . -name "*.c" | ./call_stack.sh
【Execution result】
I marked the function with * because cflow will detect a simple recursive call.
func()
func(),printf()
func(),func2()
func(),n_sub()
func(),n_sub(),func3()
func(),n_sub(),printf()
func(),func()*
func2()
func2(),printf()
func2(),n_sub()
func2(),n_sub(),func3()
func2(),n_sub(),printf()
func2(),func()
func3()
func3(),printf()
func3(),func2()
func3(),n_sub()
func3(),n_sub(),printf()
main()
main(),printf()
main(),n_sub()
main(),n_sub(),printf()
main(),func()
main(),func2()
[Cflow output (reference)]
for file in *.c; do cflow ${file}; done
func() <int func () at func.c:7> (R):
printf()
func2()
n_sub() <int n_sub () at func.c:14>:
func3()
printf()
func() <int func () at func.c:7> (recursive: see 1)
func2() <int func2 (void) at func2.c:7>:
printf()
n_sub() <int n_sub () at func2.c:13>:
func3()
printf()
func()
func3() <int func3 () at func3.c:5>:
printf()
func2()
n_sub() <int n_sub () at func3.c:11>:
printf()
main() <int main (int argc, char *argv[]) at main.c:6>:
printf()
n_sub() <int n_sub () at main.c:13>:
printf()
func()
func2()
[Tools used]
cflow (GNU cflow) 1.4
sed (GNU sed) 4.4
GNU bash, version 4.4.20 (1)-release (x86_64-pc-linux-gnu)
GNU Awk 4.1.4, API: 1.1 (GNU MPFR 4.0.1, GNU MP 6.1.2)
【bonus】
Clang's Python bindings make source analysis in C a lot easier.
* Cflow is easier if you just want to check the function call relationship.