[dtrace-discuss] How to monitor memory access with DTRACE?

[Adam Leventhal]

As Dan mentioned, you might be able to solve the problem with a conventional
debugger (mdb or dbx) that supports watchpoints. We've discussed implementing
a watchpoint provider for DTrace, but haven't seen enough justification --
if we get enough requests though...

Adam

On Wed, Jan 24, 2007 at 05:28:55AM -0800, f7a7 wrote:
> Hi, I'm a newbie to dtrace
> 
> I met such an problem that one byte in a memry block is changed by unknown operation. My question is can I monitor the memory access operation and determin which function do that?
> 
> My source code like this:
> The memory block is member struct of a class -
> class A
> {
> public:
>     struct MEM_BLOCK
>     {
>         int a;
>         int b;
>         char c;
>     };
>     MEM_BLOCK memBLK;
> 
>     void func(int p)
>     {
>         b = p;
>     }
> };
> 
> In my application, struct member "int b" should be accessed by "func" only. But I found it always changed by unknown operation without invoke "func" or direct member parameter visit.
> Coz the total amount of the application is too big to me for detail code review.
> I wanna to get help from DTRACE.
> 
> Could u tell me whether DTARCE can monitor such kind of memory access and report which one access it?
> 
> Thanx
>  
>  
> This message posted from opensolaris.org
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-- 
Adam Leventhal, Solaris Kernel Development       http://blogs.sun.com/ahl