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License: Apache License 2.0
Cally, a C project call graph generator using GCC's generated Register Transfer Language (RTL) files
License: Apache License 2.0
Hi, Chaudron. Thanks for this great tool! There's only one thing I really miss which is handling multiple functions with the same name. As an example, let's imagine a toy-project containing four files: a.c
, b.c
, header.h
and c.c
:
a.c:
static void a(void)
{}
void a_wrapper(void)
{
a();
}
b.c:
void a(void)
{}
header.h:
void a(void);
void a_wrapper(void);
c.c:
#include "header.h"
int main()
{
a();
a_wrapper();
return 0;
}
The result of cally's full graph for this project is:
But as we have two different and valid a()
declarations in our project, we would expect something like this:
Cally does warn of multiple definitions, which is great. But it would be even better if it could disambiguate the different definitions as they are all valid C constructions.
I know this might be a limitation of the *.expand
files format: function calls contain the callee address but function declarations don't show this information, so we cannot disambiguate. But I thought that perhaps raising this issue could hopefully bring up ideas on how this could be resolved (maybe even by using more than just the *.expand
files). Any thoughts/ideas on this?
Nodes that have missing links to other nodes due to max-depth, exclude, or no-externs should be visually different. Maybe a red lining?
I wondered which version of GCC this has been tested with. I am using a fairly old GCC version 4.5 and am seeing some incorrect output from the tool.
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