C++ mangling, function name to mangled name (or tree)

[Pierre Vittet <piervit at pvittet dot com>]

Hello,

I am working on a plugin which permits simple static analysis. I would 
like my plugin to work with C++ but I have to take in account the C++ 
mangling.

I would like user of the plugin to give in arguments the name of the 
functions on which he would like a test to be run. That means that I 
must convert the string containing a function name (like 
"myclass::init") and get either the mangled name or the tree 
corresponding to the function. I know that there might be several 
results (functions with the same name and different arguments), a good 
policy for me would be to recover every concerned functions (at least 
for the moment).

I guess what I want to do is possible, because there are already some 
tools doing it (like gdb).

Also, when I use fdump-ipa-all, I get something interesting in the 
.visibility file:

int Application::test(int)/1 @0xb6cff6b4 (asm: _ZN11Application4testEi) 
availability:available analyzed reachable body externally_visible finalized
  called by: int main()/2 (1.00 per call) (can throw external) 

  calls: int printf(const char*, ...)/4 (1.00 per call) (can throw 
external)

We get both the "real name" and the mangled one 
(_ZN11Application4testEi). But I don't know where I can find such 
translating.

I have looked at cp/mangle.c, which has some interesting function, for 
exemple giving the mangle named from the corresponding tree, but in this 
case, how can I get the tree?

If you have any idea, thanks!

Cheers,

Pierre Vittet