Re: [PATCH v2] tools/perf: Fix the mask in regs_dump__printf and

From: Jiri Olsa
Date: Mon Jun 20 2016 - 05:30:40 EST


On Mon, Jun 20, 2016 at 02:14:01PM +0530, Madhavan Srinivasan wrote:

SNIP

> diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
> index e3ce2f34d3ad..76d5006ebcc3 100644
> --- a/tools/perf/builtin-script.c
> +++ b/tools/perf/builtin-script.c
> @@ -412,11 +412,16 @@ static void print_sample_iregs(struct perf_sample *sample,
> struct regs_dump *regs = &sample->intr_regs;
> uint64_t mask = attr->sample_regs_intr;
> unsigned i = 0, r;
> + unsigned long _mask[sizeof(mask)/sizeof(unsigned long)];
>
> if (!regs)
> return;
>
> - for_each_set_bit(r, (unsigned long *) &mask, sizeof(mask) * 8) {
> + _mask[0] = mask & ULONG_MAX;
> + if (sizeof(mask) > sizeof(unsigned long))
> + _mask[1] = mask >> 32;
> +
> + for_each_set_bit(r, _mask, sizeof(mask) * 8) {
> u64 val = regs->regs[i++];
> printf("%5s:0x%"PRIx64" ", perf_reg_name(r), val);
> }
> diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
> index 5214974e841a..2eaa42a4832a 100644
> --- a/tools/perf/util/session.c
> +++ b/tools/perf/util/session.c
> @@ -940,8 +940,13 @@ static void branch_stack__printf(struct perf_sample *sample)
> static void regs_dump__printf(u64 mask, u64 *regs)
> {
> unsigned rid, i = 0;
> + unsigned long _mask[sizeof(mask)/sizeof(unsigned long)];
>
> - for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
> + _mask[0] = mask & ULONG_MAX;
> + if (sizeof(mask) > sizeof(unsigned long))
> + _mask[1] = mask >> 32;
> +
> + for_each_set_bit(rid, _mask, sizeof(mask) * 8) {
> u64 val = regs[i++];

could you please move the common code into the function?

thanks,
jirka