Hi everybody,
I have a question about function wrapping for C++ code:
I want to wrap a function foo:
int foo( int x, int y )
{
return x + y;
}
with the following wrapper code:
int I_WRAP_SONAME_FNNAME_ZU(NONE,foo)( int x, int y )
{
int result;
OrigFn fn;
VALGRIND_GET_ORIG_FN(fn);
printf("foo's wrapper: args %d %d\n", x, y);
CALL_FN_W_WW(result, fn, x,y);
printf("foo's wrapper: result %d\n", result);
return result;
}
This works fine with gcc but not with g++.
The reason for that is that the mangled label does not match the wrapper
label:
I compile with -S to assembler:
The mangled name for foo: _Z3fooii
The mangled name for foo wrapper: _Z15_vgwZU_NONE_fooii
When I change the label of the wrapper function by hand in the assembler
file to:
_vgwZU_NONE__Z3fooii Valgrind wraps the function correctly.
It seems that it is not possible to wrap C++ functions because the macros
are not powerful enough!
Is there any other possibility to wrap C++ functions?
My solution:
One possibilty could be to extend the Macros in valgrind.h by integrating a
mangeling mechanism to generate correct wrapper names. Can anybody confirm
this?
Thanks in advance.
Mit freundlichen Grüßen / Kind Regards
*Patrick Heckeler*
University of Tuebingen
Wilhelm-Schickard-Institute
Computer Engineering Department
Sand 13 D-72076 Tuebingen
Office B 204
Phone: +49 (0)7071 29 78 977
Fax: +49 (0)7071 29 50 62
Skype: p_heckeler
Email: heckeler [at] informatik [dot] uni-tuebingen [dot] de
WWW: http://www.ti.uni-tuebingen.de/Patrick-Heckeler.876.0.html
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