Valgrind is reporting a handful of 'uninitialized data' errors in my c++
application. When I use --track-origins=yes it says the uninitialized data came
from a heap allocation from a 'new someclass()' expression. I am confused by
this because
a) if I step through the code in gdb I can clearly see the pieces of data being
initialized by the constructor
b) manual inspection of the code leads me to the same belief
There are no other errors that valgrind reports besides this uninitialized data
error so I do not think its some random memory corruption. Is there a chance
that valgrind is somehow confused about data initialized in a class constructor?
FWIW the class hierarchy is A -> B -> C, meaning B derives from A and C derives
from B. The object being instantiated is C. The A class's constructor is the
one initializing the variable that valgrind ultimately reports is uninitialized.
I am unable to produce a small test case that reproduces this behavior (I
tried..) nor am I able to reduce my application to a small test case (it is
fairly large and complex). To try to debug this problem further I put printf
statements immediately after the creation of the object. valgrind does not
complain about uninitialized data at that point, only some time much later.
That is..
C * c = new C();
printf("%d\n", c->getX()); // valgrind doesn't report any violations here
.. much later, in a completely different part of the code ..
printf("%d\n", c->getX()); // valgrind reports a violation here
I even checked that the two c pointers had the same value so if the object
wasn't uninitialized at the start, how could it be uninitialized later on?
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