hi,
I debug gdb using itself, i find a strange issue ：
the programme being debugged execute not in line
order,for example, it goes into line 20,then it goes into line 18 ,
which are simply assignment operations,
what is the reasin for this?
thanks!
On Sat, 11 Aug 2012 05:14:41 +0200, rivers horse wrote: > I debug gdb using itself, i find a strange issue ： > the programme being debugged execute not in line > order,for example, it goes into line 20,then it goes into line 18 , > which are simply assignment operations, > > what is the reasin for this? You have probably compiled the file with -O2, use/force -O0 (gcc options). Regards, Jan
> Date: Sat, 11 Aug 2012 11:14:41 +0800 > From: rivers horse <horserivers <at> gmail.com> > > I debug gdb using itself, i find a strange issue ： > the programme being debugged execute not in line > order,for example, it goes into line 20,then it goes into line 18 , > which are simply assignment operations, > > what is the reasin for this? Compiler optimizations are known to reorder code, if doing so cannot affect the result. If your GDB is compiled with optimizations, that's the reason.
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