Hello,
I declared a class with some array of doubles as attributes. I have a
function called init to initialize them through parameters passed from
the outside, and here it is:
void weights::init (int labels, int nnodes, int maxpool, int wcon, int
npatterns, int npointers) {
patterns_out=new double[npatterns];
npats=npatterns;
nodes=nnodes;
LENGHT=labels+(npointers*(nodes-1));
NPOINTERS=npointers;
labelWeights=new double[LENGHT];
oldLabelWeights=new double[LENGHT];
===================================== problems follow!
recWeights=new double[npointers]; (1)
oldRecWeights=new double[npointers];
update_C=new double[LENGHT];
oldUpdate_C=new double[LENGHT]; (2)
rccDerivatives=new double[npointers];
oldRccDerivatives=new double[npointers];
deltaRccDerivatives=new double[npointers];
oldDeltaRccDerivatives=new double[npointers];
residual=new double[npatterns];
tmpRcc=new double[npatterns];
}
Pretty average, it seems. Well, right after the line, there's always
one of the following statements rising a segmentation fault, generally
1 or 2.
I don't understand why, these seem to be very basic operations.
Thanks in advance.
ZDS.
6  1705 
ZillionDollarSadist a écrit :
Hello,
I declared a class with some array of doubles as attributes. I have a
function called init to initialize them through parameters passed from
the outside, and here it is:
void weights::init (int labels, int nnodes, int maxpool, int wcon, int
npatterns, int npointers) {...
LENGHT=labels+(npointers*(nodes-1));
NPOINTERS=npointers;
labelWeights=new double[LENGHT];
oldLabelWeights=new double[LENGHT];
===================================== problems follow!
recWeights=new double[npointers]; (1)
oldRecWeights=new double[npointers];
update_C=new double[LENGHT];
oldUpdate_C=new double[LENGHT]; (2)
Pretty average, it seems. Well, right after the line, there's always
one of the following statements rising a segmentation fault, generally
1 or 2.
What are the values of npointers and LENGHT ?
Perhaps should you at least assert that they are >=0 otherwise you
should get a std::bad_alloc exception - try new (nothrow). What is your
compiler ?
Have you overloaded operator new ?
Michael
Michael DOUBEZ ha scritto:
>
What are the values of npointers and LENGHT ?
In the current tryout I'm doing, LENGHT =9 and npointers=1.
Perhaps should you at least assert that they are >=0 otherwise you
should get a std::bad_alloc exception - try new (nothrow). What is your
compiler ?
The classic gcc, running on OpenSuse.
Have you overloaded operator new ?
No, it's the standard one.
Weird...
ZDS.
ZillionDollarSadist wrote:
Hello,
I declared a class with some array of doubles as attributes. I have a
function called init to initialize them through parameters passed from
the outside, and here it is:
What is "patterns_out", "npats" and other. Print the parts of class
declaration, print in which place of code object of "weights" created
and "init" called.
ZillionDollarSadist wrote:
Hello,
I declared a class with some array of doubles as attributes. I have a
function called init to initialize them through parameters passed from
the outside, and here it is:
void weights::init (int labels, int nnodes, int maxpool, int wcon, int
npatterns, int npointers) {
All this silly new'ing makes my head swim.
Have you considered vector? That would take care
of most of the allocation/deallocation headaches?
Chances are one of the following:
npointers or LENGTH is either very large or negative.
You omitted some lines that write off the end of
the array.
ZillionDollarSadist wrote:
Michael DOUBEZ ha scritto:
>What are the values of npointers and LENGHT ?
In the current tryout I'm doing, LENGHT =9 and npointers=1.
>Perhaps should you at least assert that they are >=0 otherwise you
should get a std::bad_alloc exception - try new (nothrow). What is your
compiler ?
The classic gcc, running on OpenSuse.
I hope you meant 'g++', rather than 'gcc'.
Always compile AND link C++ code using 'g++'.
>
>Have you overloaded operator new ?
No, it's the standard one.
Weird...
ZDS.
ZillionDollarSadist wrote:
Michael DOUBEZ ha scritto:
>What are the values of npointers and LENGHT ?
In the current tryout I'm doing, LENGHT =9 and npointers=1.
>Perhaps should you at least assert that they are >=0 otherwise you
should get a std::bad_alloc exception - try new (nothrow). What is your
compiler ?
The classic gcc, running on OpenSuse.
>Have you overloaded operator new ?
No, it's the standard one.
Weird...
ZDS.
I'd say you've trashed the heap in some code you don't show
and then a subsequent new segfaults. Try passing your code
through valgrind, maybe it will tell you what's wrong.
HTH,
- J. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
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