I am not sure why x86_32 would fail as I have never dealt with that platform. I
know that when we set a breakpoint in the debuggee, we put a "INT" instruction
(0xcc) into the program. I am not sure if x86_32 does anything differently with
the 0xcc traps.
You might try and place a:
__builtin_trap()
into your code:
#include <stdio.h>
int main()
{
for(int i=0 ;i<2;i++)
{
printf ("hello world\n");
}
__builtin_trap();
return 0;
}
then compile and debug it. If the debugger stops at the builtin_trap, then at
least we know the breakpoint opcode should trigger the process to stop.
% clang -g -O0 -o helloworld helloworld.c
% lldb helloworld
The other thing you can do is attach the output of the following commands:
(lldb) b helloworld.c:7
(lldb) b
(lldb) target list
I might be able to tell more if you attach the output to the LLDB commands
above...
Greg
On Jan 2, 2014, at 8:50 PM, liu chao jun <[email protected]> wrote:
> Thank you very much ,And i have tried it on my computer ,however ,it seems
> fail too ,what's more , As the llvm offical web site ,it seems support
> X86_64 not x86_32 ,For my Operation Systerm is ubuntu x86_32 , And i also try
> in ubuntu x86_64 ,And it success , it is my fail reason ? Thank your much !
> And looking forward to your reply .
>
>
>
>
>
>
> At 2014-01-03 03:11:22,"Greg Clayton" <[email protected]> wrote:
> >You did everything correctly. My guess is you didn't supply -O0 on your
> >compile line and the compiler optimized your code. When the compiler
> >optimizes your code, the line numbers and debug info are not very useful due
> >the the optimizations.
> >
> >Try compiling with:
> >
> >% clang -g -O0 -o helloworld helloworld.c
> >
> >And try again.
> >
> >Greg
> >
> >On Dec 24, 2013, at 11:45 PM, liu chao jun <[email protected]> wrote:
> >
> >> hi all ,
> >> This is amiko who is a new lldb user ,There is same questions need
> >> your help
> >> 1, Can lldb debug C/C++ project .ext file directly like gdb or not ?
> >> 2 ,Here is a simple c project named helloword the detail source please
> >> follow below:
> >>
> >> // helloworld.c \
> >> 1 #include <stdio.h>
> >> 2 int main()
> >> 3 {
> >> 4 int i ;
> >> 5 for(i=0 ;i<2;i++)
> >> 6 {
> >> 7 printf ("hello world\n");
> >> 8 }
> >> 9 return 0 ;
> >> 10 }
> >> my step is
> >> 1 clang -g -o helloworld helloworld.c
> >> 2 $then compile and debug it:
> >> 3<lldb> b hellowold.c:7
> >> 4 run
> >> I think it will pause in line 7 .however it seems fail ,and print two
> >> hello world , In other word setting breakpoint operation does not useful .
> >> Is any error or fault for my operations ,Thank you very much ,And looking
> >> forward to your reply ,Thanks again .
> >>
> >>
> >>
> >>
> >>
> >> _______________________________________________
> >> lldb-dev mailing list
> >> [email protected]
> >> http://lists.cs.uiuc.edu/mailman/listinfo/lldb-dev
> >
>
>
>
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