Display smart pointers in eclipse cdt with gdb pretty printers

Question

When I debug a C ++ 11 application, I want unique_ptr and shared_ptr objects to point. But, using beautiful libstdC ++ printers, only a line with an address and similar material is printed, but I can not expand it to view its contents. I already tried the following workaround, but I did not work for me:

https://sourceware.org/ml/gdb/2013-04/msg00042.html

Can someone help me with this. Actually, I think this can be a pretty simple problem, so I wonder if there is a way to do this. But on the Internet I could not find clues ...

Answer 1

Following your link, I did exactly what Michael described, and everything works fine. You probably made a mistake when applying the changes. Now libstdcxx / v6 / printers.py should have lines 103 through 174:

class SharedPointerPrinter: "Print a shared_ptr or weak_ptr" class _iterator: def __init__(self, sharedPointer): self.sharedPointer = sharedPointer self.managedValue = sharedPointer.val['_M_ptr'] self.count = 0 def __iter__(self): return self def next(self): if self.managedValue == 0: raise StopIteration self.count = self.count + 1 if (self.count == 1): return ('Use count', self.sharedPointer.val['_M_refcount']['_M_pi']['_M_use_count']) elif (self.count == 2): return ('Weak count', self.sharedPointer.val['_M_refcount']['_M_pi']['_M_weak_count'] - 1) elif (self.count == 3): return ('Managed value', self.managedValue) else: raise StopIteration def __init__ (self, typename, val): self.typename = typename self.val = val def children (self): return self._iterator(self) def to_string (self): state = 'empty' refcounts = self.val['_M_refcount']['_M_pi'] if refcounts != 0: usecount = refcounts['_M_use_count'] weakcount = refcounts['_M_weak_count'] if usecount == 0: state = 'expired, weakcount %d' % weakcount else: state = 'usecount %d, weakcount %d' % (usecount, weakcount - 1) return '%s (%s) to %s' % (self.typename, state, self.val['_M_ptr']) class UniquePointerPrinter: "Print a unique_ptr" class _iterator: def __init__(self, uniquePointer): self.uniquePointer = uniquePointer self.managedValue = uniquePointer.val['_M_t']['_M_head_impl'] self.count = 0 def __iter__(self): return self def next(self): if self.managedValue == 0 or self.count == 1: raise StopIteration self.count = self.count + 1 return ('Managed value', self.managedValue) def __init__ (self, typename, val): self.val = val def children (self): return self._iterator(self) def to_string (self): v = self.val['_M_t']['_M_head_impl'] return ('std::unique_ptr<%s> containing %s' % (str(v.type.target()), str(v))) 

Yours faithfully