About breakpoint in gdb

[<gan_xiao_jun at yahoo dot com>]

Hi,

When use gdb to debug in linux, some breakpoint can't
be stop when it is really run through, 

Some friend introduce that use 
b ClassB::function()
instead of 
b ClassB.cpp:1234
For later way would do addicational work same as
addr2line do which may introduce some error.

It is a good way, but I encounter some exception these
days:

1)My example is when 
set a breakpoint at 
ClassB::function()
it can't be stop
but set a breakpoint at
(ClassB * )obj->function();
Then press s can step into ClassB::function()

I am not sure it is true for other case or it can't
stop for other reason.

2)I am not sure if there exist a c function like int3.

I can add this function to ClassB::function(), after
compile&run, gdb can stop as I want.
Does someone use this way?

Thanks for any comment about 1) or 2)
gan


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