Hi all,

Has someone tried on something like this?

I want to implement a concept.

I want to get a call graph for all functions and loops in an application.
with Call graph i mean which line in source code was executed at a instant of time.

The graph would be listing something like

for:31 for:33 func1
for:33
func1 func2
func2

for:line number

With this call graph we mean
1. for:31 called for:33 and func1
2. for:33 is for loop at line 33 , it is calls no one
3. func1 calls func2

and like that

I had gone through tools such as gprof. But problem is gprof gives call graph at function level not at loop level.

One more solution to it is use of "ptrace" which traces the execution flow of an application.
I am going through articles on ptrace with the hope to find solution for my problem.

If anyone knows about such a thing , do reply

Tanveer

No replies, but it is long time, i have added to this thread.

The way to get call graphs is :
1. Reading the disassembly file, and catching on the branch instructions present in that file. It is more of reading the debugging information and from that constructing the call graph.
Very tricky but can be done.

2.
Parsing the .c file
Identifying the block in C code such as loops or function calls.
After each identification, we should insert our own printf statement, on fprintf statement which writes to a file which loop or function was present.

In this case, construction of parser for .c file is difficult task. Once, one is able to idnetify loops and functions, then code insertion is next task.
And we get the call graph.

Please Correct me, in my approach.

Tanveer.