automatic adding of memory access breakpoints

[Erik Thiele <erikyyy at erikyyy dot de>]

hi.
am programming in C.

i have program that automatically creates blocks in memory
where the debugger shall break once someone accesses the block
both reading or writing.

yes this is a malloc debugger.

the idea:

if you do   void *pt = malloc (1000);
you get:

KILLERBLOCK data KILLERBLOCK
            ^
	    \_ pt

if you do free(pt);
he will check if one of the killerblocks has changed.

but then i cannot say anymore when they were changed.
to quit once they are changed i need debugger help.
how can my program automatically add such blocks into gdb???

or is there some way to do this linux level?
i.e. any mmap tricks ?

all i need is a segfault or buserror or whatsoever
right in the moment someone accesses the KILLERBLOCKs.


thanks & cu
erik


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Name:  Erik Thiele                                       \\\\
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