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Debug_GDB_Console.txt
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Debug_GDB_Console.txt
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---------------------------------------------------------
Steps to manually Debug a C++ Program and Print Variables
---------------------------------------------------------
1)
g++ -g3 main.cpp -I /home/lindorfer/boost_1_55_0 -std=c++1y
2)
gdb -q a.out
3)
break 71 ### Line number
4)
run
5)
p a
p test
6)
Quit
-----------------------------------------
Steps to Register Pretty-Printers for GDB
-----------------------------------------
0) download mod. printers for phyton 3 from https://github.com/mateidavid/Boost-Pretty-Printer
1) Copy Printers in any Sub-Directory into /home/lindorfer/gdb_printers/python/SubDirectory
2) Make a __init__.py file in that Sub-Directory (e.g. boost)
3) Edit the .gdbinit
e.g.
python
import sys
#set path to the parentdirectory
sys.path.insert(0, '/home/lindorfer/gdb_printers/python')
#import modules
from libstdcxx.v6.printers import register_libstdcxx_printers
import boost.latest ### see note on Entry Points below
#register printers
register_libstdcxx_printers (None)
boost.register_printers()
end
------------------------------------------------------
Write own Printer in Boost-Pretty-Printer's printer.py
------------------------------------------------------
##################################################
# boost::vector #
##################################################
#This is taken from the boost::container::flat_set of Ruediger's Boost Pretty-Print
@add_printer
class BoostUblasVector:
"Pretty Printer for boost::ublas::vector (Boost.Numeric)"
printer_name = 'boost::numeric::ublas::vector'
version = '1.55'
template_name = 'boost::numeric::ublas::vector'
class Iterator:
def __init__(self, pointer, size):
self.pointer = pointer
self.size = size
self.count = 0
def __iter__(self):
return self
def __next__(self):
if self.count == self.size:
raise StopIteration
count = self.count
elt = self.pointer.dereference()
self.pointer = self.pointer + 1
self.count = self.count + 1
return ('[%d]' % count, elt)
def next(self):
return self.__next__()
def __init__(self, value):
self.val = value
self.element_type = self.val.type.strip_typedefs().template_argument(0)
#Define the pointers within the vector class from vector.hpp
#I found this by using Eclipse and analyzing the structure in the debugger
def get_pointer(self):
return self.val["data_"]["data_"]
def get_size(self):
return self.val["data_"]["size_"]
def get_capacity(self):
return self.val["data_"]["size_"]
def has_elements(self):
if self.get_pointer():
return True
else:
return False
def to_string (self):
if (self.has_elements()):
return "boost::ublas::vector<%s> with %d elements, capacity %d" % (
self.element_type, self.get_size(), self.get_capacity())
else:
return "empty boost::ublas::vector<%s>" % (self.element_type)
#This part supposedly prints out the content
def children (self):
return self.Iterator(self.get_pointer(), self.get_size())
def display_hint(self):
return 'array'