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
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