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Full Discussion: how to avoid the segfault from Address 0x1cd00000103 out of bounds
Top Forums Programming how to avoid the segfault from Address 0x1cd00000103 out of bounds Post 302276522 by cdbug on Wednesday 14th of January 2009 02:40:57 AM
Old 01-14-2009
Let me show it here:

node->is_done = (int *) malloc(sizeof(int));
node->hood = (double *) malloc(sizeof(double));
node->c = (int *) malloc(sizeof(int));
node->site = (double *) malloc(sizeof(double));
node->site2 = (double *) malloc(sizeof(double));double
node->des = (double *) malloc(sizeof(double));
node->asc = (double *) malloc(sizeof(double));

//null checking

node->is_done = 0;
node->hood = 0;
node->c = 1;
node->site = 0;
node->site2 = 0;
node->des = 0;
node->asc = 0

But, use of these varialbes in code will lead to segfaults, e.g. if(node->is_done) { --- }

check these varialbes, those showing 'address 0x1cd00000103 out of bounds' will finally lead to segments

I should remind that some nodes but not all the nodes in a tree will give segfaults when checking if(node->is_done)

It is said that unsuccessful initialization is the source of 'Address 0x1cd00000103 out of bounds'. Concretely speaking, how to avoid such unsuccessful initialization occur in some nodes?

Can we take some measures?
 

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LEARN ABOUT SUNOS

di_minor_next

di_minor_next(3DEVINFO) 			       Device Information Library Functions				   di_minor_next(3DEVINFO)

NAME

       di_minor_next - libdevinfo minor node traversal functions

SYNOPSIS

       cc [ flag... ] file... -ldevinfo [ library... ]
       #include <libdevinfo.h>

       di_minor_t di_minor_next(di_node_t node, di_minor_t minor);

PARAMETERS

       minor	Handle to the current minor node or DI_MINOR_NIL.

       node	Device node with which the minor node is associated.

DESCRIPTION

       The  di_minor_next()  function  returns a handle to the next minor node for the device node node. If minor is DI_MINOR_NIL, a handle to the
       first minor node is returned.

RETURN VALUES

       Upon successful completion, a  handle to the next minor node is returned. Otherwise, DI_MINOR_NIL is returned and errno is set to  indicate
       the error.

ERRORS

       The di_minor_next() function will fail if:

       EINVAL	       Invalid argument.

       ENOTSUP	       Minor node information is not available in snapshot.

       ENXIO	       End of minor node list.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       libdevinfo(3LIB), attributes(5)

       Writing Device Drivers

SunOS 5.10							    1 Dec 1998						   di_minor_next(3DEVINFO)
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