From: Andi Kleen <[email protected]> Currently a filter like --filter "filter _text / _end" doesn't work because _end doesn't have a size. The filter resolution always wants to use the end of the function as end.
Allow this case by assuming the filter just spawns to the start of the end symbol when there is no size. This makes the above useful filter work. Cc: [email protected] Signed-off-by: Andi Kleen <[email protected]> --- tools/perf/util/auxtrace.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c index c5a6e0b12452..4c5ccb2b1298 100644 --- a/tools/perf/util/auxtrace.c +++ b/tools/perf/util/auxtrace.c @@ -1840,7 +1840,12 @@ static int addr_filter__resolve_kernel_syms(struct addr_filter *filt) if (err) return err; filt->size = start + size - filt->addr; - no_size = !!size; + /* + * When to has no size assume it's a end symbol. + * This allows filters like _text / _end + */ + if (size == 0) + filt->size = start - filt->addr; } /* The very last symbol in kallsyms does not imply a particular size */ -- 2.9.3
