On 2018-04-19 13:28, valdis.kletnieks@xxxxxx wrote: > On Thu, 19 Apr 2018 16:58:40 +0800, sizel said: > > How can I disable compile optimization in kernel for friendly debugging, Thanks > > First off, there are parts of the kernel that *WILL* explode if you try to build > with -O0 - in particular, any code that expects static inlines to be treated as > part of the unit they are inlined into for the purposes of __builtin_return_address() > and similar. Can you elaborate more on that? > Second, modern gdb is perfectly able to deal with -O2 optimization, > especially if you build with -g. (In the kernel build, CONFIG_DEBUG_INFO=y > will do the right thing for this). I don't think so. According to my experience, GDB is not good enough to deal with -O2 optimization. Maybe my gdb is not modern enough? I am using gdb7.11 (Ubuntu 7.11.1-0ubuntu1~16.5) Yubin _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
