void Frame::setNameValue() const {
if (name_val_set == nv_set || name_val_set == nv_err)
return;
if (!walker) {
setLastError(err_nosymlookup, "No Walker object was associated with this frame");
sw_printf("[%s:%u] - Error, No walker found.\n", FILE__, __LINE__);
name_val_set = nv_err;
return;
}
SymbolLookup *lookup = walker->getSymbolLookup();
if (!lookup) {
setLastError(err_nosymlookup, "No SymbolLookup object was associated with the Walker");
sw_printf("[%s:%u] - Error, No symbol lookup found.\n", FILE__, __LINE__);
name_val_set = nv_err;
return;
}
bool result = lookup->lookupAtAddr(getRA(), sym_name, sym_value);
if (!result) {
sw_printf("[%s:%u] - Error, returned by lookupAtAddr().\n", FILE__, __LINE__);
name_val_set = nv_err;
}
sw_printf("[%s:%u] - Successfully looked up symbol for frame %p\n",
FILE__, __LINE__, this);
name_val_set = nv_set;
}
void Frame::setNameValue() const {
if (name_val_set == nv_set || name_val_set == nv_err)
return;
if (!walker) {
setLastError(err_nosymlookup, "No Walker object was associated with this frame");
sw_printf("[%s:%u] - Error, No walker found.\n", FILE__, __LINE__);
name_val_set = nv_err;
return;
}
SymbolLookup *lookup = walker->getSymbolLookup();
if (!lookup) {
setLastError(err_nosymlookup, "No SymbolLookup object was associated with the Walker");
sw_printf("[%s:%u] - Error, No symbol lookup found.\n", FILE__, __LINE__);
name_val_set = nv_err;
return;
}
// Here we lookup return address minus 1 to handle the following special case:
//
// Suppose A calls B and B is a non-returnning function, and the call to B in A
// is the last instruction of A. Then the compiler may generate code where
// another function C is immediately after A. In such case, the return address
// will be the entry address of C. And if we look up function by the return
// address, we will get C rather than A.
bool result = lookup->lookupAtAddr(getRA() - 1, sym_name, sym_value);
if (!result) {
sw_printf("[%s:%u] - Error, returned by lookupAtAddr().\n", FILE__, __LINE__);
name_val_set = nv_err;
}
sw_printf("[%s:%u] - Successfully looked up symbol for frame %p\n",
FILE__, __LINE__, this);
name_val_set = nv_set;
}
