* Can i set a breakpoint when a member of a C struct is being assigned?
@ 2007-07-30 5:37 ying lcs
2007-07-30 9:32 ` Bernhard Walle
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: ying lcs @ 2007-07-30 5:37 UTC (permalink / raw)
To: gdb
Hi,
Can i set a breakpoint when a member of a C struct is being assigned?
For example, i have a C struct in my code:
struct myStruct{
int type;
};
How can I break my debugging program when I have code like this:
myStruct* p;
p->type = 10;
Thank you.
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: Can i set a breakpoint when a member of a C struct is being assigned?
2007-07-30 5:37 Can i set a breakpoint when a member of a C struct is being assigned? ying lcs
@ 2007-07-30 9:32 ` Bernhard Walle
2007-07-30 21:16 ` Eli Zaretskii
2007-07-30 21:17 ` Jim Blandy
2 siblings, 0 replies; 4+ messages in thread
From: Bernhard Walle @ 2007-07-30 9:32 UTC (permalink / raw)
To: gdb
* ying lcs <yinglcs@gmail.com> [2007-07-30 05:20]:
> Hi,
>
> Can i set a breakpoint when a member of a C struct is being assigned?
>
> For example, i have a C struct in my code:
> struct myStruct{
> int type;
> };
>
> How can I break my debugging program when I have code like this:
>
> myStruct* p;
Set a breakpoint here. And add a watchpoint.
> p->type = 10;
Then GDB stops here.
Bernhard
--
lp1 on fire
-- One of the more obfuscated kernel messages
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: Can i set a breakpoint when a member of a C struct is being assigned?
2007-07-30 5:37 Can i set a breakpoint when a member of a C struct is being assigned? ying lcs
2007-07-30 9:32 ` Bernhard Walle
@ 2007-07-30 21:16 ` Eli Zaretskii
2007-07-30 21:17 ` Jim Blandy
2 siblings, 0 replies; 4+ messages in thread
From: Eli Zaretskii @ 2007-07-30 21:16 UTC (permalink / raw)
To: ying lcs; +Cc: gdb
> Date: Sun, 29 Jul 2007 22:20:58 -0500
> From: "ying lcs" <yinglcs@gmail.com>
>
> Can i set a breakpoint when a member of a C struct is being assigned?
>
> For example, i have a C struct in my code:
> struct myStruct{
> int type;
> };
>
> How can I break my debugging program when I have code like this:
>
> myStruct* p;
>
> p->type = 10;
Like this:
(gdb) watch p->type
(If `p' is a local (as opposed to static) variable, you need to do
this when `p' is in scope.
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: Can i set a breakpoint when a member of a C struct is being assigned?
2007-07-30 5:37 Can i set a breakpoint when a member of a C struct is being assigned? ying lcs
2007-07-30 9:32 ` Bernhard Walle
2007-07-30 21:16 ` Eli Zaretskii
@ 2007-07-30 21:17 ` Jim Blandy
2 siblings, 0 replies; 4+ messages in thread
From: Jim Blandy @ 2007-07-30 21:17 UTC (permalink / raw)
To: ying lcs; +Cc: gdb
"ying lcs" <yinglcs@gmail.com> writes:
> Can i set a breakpoint when a member of a C struct is being assigned?
>
> For example, i have a C struct in my code:
> struct myStruct{
> int type;
> };
There isn't any way to set a breakpoint on all assignments to a chosen
member of a chosen structure type, regardless of which actual object
of that type is being modified.
You can set a watchpoint on a particular member of a particular
object; see the GDB manual on 'watchpoints'.
You can, of course, set a breakpoint on a particular assignment
statement.
^ permalink raw reply [flat|nested] 4+ messages in thread
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2007-07-30 5:37 Can i set a breakpoint when a member of a C struct is being assigned? ying lcs
2007-07-30 9:32 ` Bernhard Walle
2007-07-30 21:16 ` Eli Zaretskii
2007-07-30 21:17 ` Jim Blandy
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