breakpoint tests on the ARM 32-bit kernel are broken in several ways. The breakpoint length requested does not necessarily match whether the function address has the Thumb bit (bit 0) set or not, and this does matter to the ARM kernel hw_breakpoint infrastructure. See [1] for background.
[1]: https://lkml.org/lkml/2018/11/15/205 As Will indicated, the overflow handling would require single-stepping which is not supported at the moment. Just disable those tests for the ARM 32-bit platforms. Signed-off-by: Florian Fainelli <[email protected]> --- tools/perf/tests/bp_signal.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/tests/bp_signal.c b/tools/perf/tests/bp_signal.c index a467615c5a0e..3b5471ea2331 100644 --- a/tools/perf/tests/bp_signal.c +++ b/tools/perf/tests/bp_signal.c @@ -296,7 +296,7 @@ bool test__bp_signal_is_supported(void) * instruction breakpoint using the perf event interface. * Once it's there we can release this. */ -#if defined(__powerpc__) || defined(__s390x__) +#if defined(__powerpc__) || defined(__s390x__) || defined(__arm__) return false; #else return true; -- 2.17.1
