Easiest way to get the function's name using the function pointer - c++11

Question

I am writing a utility to get the memory used by the process while getting into the function and while getting out of the function for each function. I plan to do it in the _penter and _pexit functions. Is there a simple way to get the name of the function in _penter and _pexit? I have the pdb file of my executable. Can somebody help me to get it using SymGetSymFromAddr64 and StackWalk64?

Answer 1

I was also looking for a solution and I couldn't find it but managed to solve it myself here is what I used
Configuration Properties > C/C++ > Command Line
Add compiler option to Additional Options box
Like so
Add flag /Gh for _penter hook
Add flag /GH for _pexit hook
Code I use for tracing / logging
#include <intrin.h>
extern "C" void __declspec(naked) __cdecl _penter(void) {
__asm {
push ebp; // standard prolog
mov ebp, esp;
sub esp, __LOCAL_SIZE
pushad; // save registers
}
// _ReturnAddress always returns the address directly after the call, but that is not the start of the function!
PBYTE addr;
addr = (PBYTE)_ReturnAddress() - 5;
SYMBOL_INFO* mysymbol;
HANDLE process;
process = GetCurrentProcess();
SymInitialize(process, NULL, TRUE);
mysymbol = (SYMBOL_INFO*)calloc(sizeof(SYMBOL_INFO) + 256 * sizeof(char), 1);
mysymbol->MaxNameLen = 255;
mysymbol->SizeOfStruct = sizeof(SYMBOL_INFO);
SymFromAddr(process, (DWORD64)((void*)addr), 0, mysymbol);
myprintf("Entered Function: %s [0x%X]\n", mysymbol->Name, addr);
_asm {
popad; // restore regs
mov esp, ebp; // standard epilog
pop ebp;
ret;
}
}
extern "C" void __declspec(naked) __cdecl _pexit(void) {
__asm {
push ebp; // standard prolog
mov ebp, esp;
sub esp, __LOCAL_SIZE
pushad; // save registers
}
// _ReturnAddress always returns the address directly after the call, but that is not the start of the function!
PBYTE addr;
addr = (PBYTE)_ReturnAddress() - 5;
SYMBOL_INFO* mysymbol;
HANDLE process;
process = GetCurrentProcess();
SymInitialize(process, NULL, TRUE);
mysymbol = (SYMBOL_INFO*)calloc(sizeof(SYMBOL_INFO) + 256 * sizeof(char), 1);
mysymbol->MaxNameLen = 255;
mysymbol->SizeOfStruct = sizeof(SYMBOL_INFO);
SymFromAddr(process, (DWORD64)((void*)addr), 0, mysymbol);
myprintf("Exit Function: %s [0x%X]\n", mysymbol->Name, addr);
_asm {
popad; // restore regs
mov esp, ebp; // standard epilog
pop ebp;
ret;
}
}