[PATCH] perf TUI: Don't throw error for zero length symbols

From: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
To: anton@samba.org, acme@kernel.org
Cc: peterz@infradead.org, mingo@redhat.com,
	alexander.shishkin@linux.intel.com, chris.ryder@arm.com,
	mhiramat@kernel.org, linux-kernel@vger.kernel.org,
	mpe@ellerman.id.au, benh@kernel.crashing.org, paulus@samba.org,
	npiggin@gmail.com, linuxppc-dev@lists.ozlabs.orgp,
	Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Subject: [PATCH] perf TUI: Don't throw error for zero length symbols
Date: Tue, 22 Nov 2016 14:10:50 +0530	[thread overview]
Message-ID: <1479804050-5028-1-git-send-email-ravi.bangoria@linux.vnet.ibm.com> (raw)
In-Reply-To: <20161121172818.161639c2@kryten>

perf report (with 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.

Link: https://lkml.org/lkml/2016/10/8/189

Reported-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.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 aeb5a44..430d039 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -593,7 +593,8 @@ 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;
-- 
1.8.3.1
