[PATCH 23/29] perf annotate: Don't throw error for zero length symbols
Arnaldo Carvalho de Melo
acme at kernel.org
Wed Dec 21 04:03:52 AEDT 2016
From: Ravi Bangoria <ravi.bangoria at linux.vnet.ibm.com>
'perf report --tui' exits with error when it finds a sample of zero
length symbol (i.e. addr == sym->start == sym->end). Actually these are
valid samples. Don't exit TUI and show report with such symbols.
Reported-and-Tested-by: Anton Blanchard <anton at samba.org>
Link: https://lkml.org/lkml/2016/10/8/189
Signed-off-by: Ravi Bangoria <ravi.bangoria at linux.vnet.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin at linux.intel.com>
Cc: Benjamin Herrenschmidt <benh at kernel.crashing.org>
Cc: Chris Riyder <chris.ryder at arm.com>
Cc: linuxppc-dev at lists.ozlabs.org
Cc: Masami Hiramatsu <mhiramat at kernel.org>
Cc: Michael Ellerman <mpe at ellerman.id.au>
Cc: Nicholas Piggin <npiggin at gmail.com>
Cc: Paul Mackerras <paulus at samba.org>
Cc: Peter Zijlstra <peterz at infradead.org>
Cc: stable at kernel.org # v4.9+
Link: http://lkml.kernel.org/r/1479804050-5028-1-git-send-email-ravi.bangoria@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme at redhat.com>
---
tools/perf/util/annotate.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index c81a3950a7fe..06cc04e5806a 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -647,7 +647,8 @@ static int __symbol__inc_addr_samples(struct symbol *sym, struct map *map,
pr_debug3("%s: addr=%#" PRIx64 "\n", __func__, map->unmap_ip(map, addr));
- if (addr < sym->start || addr >= sym->end) {
+ if ((addr < sym->start || addr >= sym->end) &&
+ (addr != sym->end || sym->start != sym->end)) {
pr_debug("%s(%d): ERANGE! sym->name=%s, start=%#" PRIx64 ", addr=%#" PRIx64 ", end=%#" PRIx64 "\n",
__func__, __LINE__, sym->name, sym->start, addr, sym->end);
return -ERANGE;
--
2.9.3
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