From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Fri, 1 May 2009 10:23:18 +0000 (+0200)
Subject: perf_counter: tool: handle 0-length data files
X-Git-Tag: Ubuntu-5.13.0-19.19~35838^2~315
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=585e3374d9d29376c2c37d821c8b7637dd48ca95;p=mirror_ubuntu-jammy-kernel.git

perf_counter: tool: handle 0-length data files

Avoid perf-report barfing on 0-length data files.

[ Impact: fix perf-report SIGBUS ]

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <20090501102533.196245693@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/Documentation/perf_counter/perf-report.cc b/Documentation/perf_counter/perf-report.cc
index 933a07544534..911d7f3e7a65 100644
--- a/Documentation/perf_counter/perf-report.cc
+++ b/Documentation/perf_counter/perf-report.cc
@@ -402,6 +402,11 @@ int main(int argc, char *argv[])
 		exit(-1);
 	}
 
+	if (!stat.st_size) {
+		fprintf(stderr, "zero-sized file, nothing to do!\n");
+		exit(0);
+	}
+
 	load_kallsyms();
 
 remap: