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Hi All,
My development envieroment is TORNADO 2.2 + vxworks 5.5.
I am checking some old code writen two years ago.
I found there is a NULL point dereference in current code.
After I correct this problem, I check the memory content of 0x0000000,
the problem still exists.
I suspect it 's still the NULL pointer problem.
How I find out the code attempting written to 0x0000000.?
How find NULL point derefernce in MPC8245
VxWorks got a nprShow utility to use.
On 1月23日, 下午2时31分, "Jeffery Ren" <poor...@gmail.com> wrote:[color=blue]
> Hi All,
>
> My development envieroment is TORNADO 2.2 + vxworks 5.5.
> I am checking some old code writen two years ago.
> I found there is a NULL point dereference in current code.
> After I correct this problem, I check the memory content of 0x0000000,
> the problem still exists.
> I suspect it 's still the NULL pointer problem.
>
> How I find out the code attempting written to 0x0000000.?
>
> How find NULL point derefernce in MPC8245[/color]
Your best bet wil be use hardware debugger , and put memory watch on
00000 address
On Jan 22, 11:31 pm, "Jeffery Ren" <poor...@gmail.com> wrote:[color=blue]
> Hi All,
>
> My development envieroment is TORNADO 2.2 + vxworks 5.5.
> I am checking some old code writen two years ago.
> I found there is a NULL point dereference in current code.
> After I correct this problem, I check the memory content of 0x0000000,
> the problem still exists.
> I suspect it 's still the NULL pointer problem.
>
> How I find out the code attempting written to 0x0000000.?
>
> How find NULL point derefernce in MPC8245[/color]
Jeffery Ren wrote:[color=blue]
> Hi All,
>
> My development envieroment is TORNADO 2.2 + vxworks 5.5.
> I am checking some old code writen two years ago.
> I found there is a NULL point dereference in current code.
> After I correct this problem, I check the memory content of 0x0000000,
> the problem still exists.
> I suspect it 's still the NULL pointer problem.
>
> How I find out the code attempting written to 0x0000000.?
>
>
> How find NULL point derefernce in MPC8245
>[/color]
Hi,
on PPC 405, I successfully used a 32-byte (cache-line) data breakpoint
supported by this chip's specific VxWorks adaption.
You can set it from shell or from the code itself by using the bh() routine.
Check your hw-specific VxWorks docs for a similar feature.
Friedrich Ensslin