It seems HAVE_HW_BREAKPOINT depends on PERF_EVENTS, I will double check this on Monday. If it is, would it be ok to have the overhead in default build?
Ting ----- 原始郵件 ----- > 寄件者: "Kyle Huey" <[email protected]> > 收件者: "Ting-Yu Chou" <[email protected]> > 副本: "dev-b2g" <[email protected]> > 寄件備份: 2014 7 月 12 星期六 上午 12:32:09 > 主旨: Re: [b2g] [Flame] Can use hardware watchpoint now > > This is awesome! Can we change the flame's default KConfig to have this > patch? > > Great work. > > - Kyle > > On Thu, Jul 10, 2014 at 8:48 PM, Ting-Yu Chou <[email protected]> wrote: > > As of bug 1035645 landing, gdb hardware watchpoint will be working on Flame > > with > > following steps: > > > > a. Enable kernel HAVE_HW_BREAKPOINT > > diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig > > index 9dd7949..04f3b99 100644 > > --- a/arch/arm/Kconfig > > +++ b/arch/arm/Kconfig > > @@ -29,7 +29,8 @@ config ARM > > select HAVE_PERF_EVENTS > > select PERF_USE_VMALLOC > > select HAVE_REGS_AND_STACK_ACCESS_API > > - select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || > > CPU_V6K || CPU_V7)) > > +# select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || > > CPU_V6K || CPU_V7)) > > + select HAVE_HW_BREAKPOINT > > select HAVE_C_RECORDMCOUNT > > select HAVE_GENERIC_HARDIRQS > > select HAVE_SPARSE_IRQ > > b. Replace prebuilts/misc/android-arm/gdbserver/gdbserver by another one > > of at > > least 7.4, for example, the one from linaro [1] or jimdb [2]. > > c. $ ./build.sh && ./flash.sh > > d. $ export GDB=path/to/the/gdb/come/with/gdbserver; ./run-gdb.sh > > e. (gdb) set can-use-hw-watchpoints 1 > > > > I hope there's an easier way for a), but I haven't found it. > > > > [1] > > https://releases.linaro.org/13.10/components/toolchain/binaries/gcc-linaro-arm-linux-gnueabihf-4.8-2013.10_linux.tar.bz2 > > [2] http://people.mozilla.org/~nchen/jimdb/jimdb-arm-linux_x64.tar.bz2 > > > > Cheers, > > Ting > > _______________________________________________ > > dev-b2g mailing list > > [email protected] > > https://lists.mozilla.org/listinfo/dev-b2g > _______________________________________________ dev-b2g mailing list [email protected] https://lists.mozilla.org/listinfo/dev-b2g
