The new ovs-backtrace-parse utility makes the output of ovs-appctl
backtrace more human readable by removing duplicate traces and
converting addresses to function names.
Signed-off-by: Ethan Jackson <et...@nicira.com>
---
utilities/.gitignore | 1 +
utilities/automake.mk | 2 +
utilities/ovs-backtrace-parse.in | 100 +++++++++++++++++++++++++++++++++++++++
3 files changed, 103 insertions(+)
create mode 100755 utilities/ovs-backtrace-parse.in
diff --git a/utilities/.gitignore b/utilities/.gitignore
index 4f96a4f..9813842 100644
--- a/utilities/.gitignore
+++ b/utilities/.gitignore
@@ -3,6 +3,7 @@
/nlmon
/ovs-appctl
/ovs-appctl.8
+/ovs-backtrace-parse
/ovs-benchmark
/ovs-benchmark.1
/ovs-cfg-mod
diff --git a/utilities/automake.mk b/utilities/automake.mk
index 890f867..4dc9545 100644
--- a/utilities/automake.mk
+++ b/utilities/automake.mk
@@ -7,6 +7,7 @@ bin_PROGRAMS += \
bin_SCRIPTS += utilities/ovs-pki utilities/ovs-parse-leaks
if HAVE_PYTHON
bin_SCRIPTS += \
+ utilities/ovs-backtrace-parse \
utilities/ovs-l3ping \
utilities/ovs-pcap \
utilities/ovs-tcpundump \
@@ -20,6 +21,7 @@ scripts_SCRIPTS += \
scripts_DATA += utilities/ovs-lib
EXTRA_DIST += \
+ utilities/ovs-backtrace-parse.in \
utilities/ovs-check-dead-ifs.in \
utilities/ovs-ctl.in \
utilities/ovs-l3ping.in \
diff --git a/utilities/ovs-backtrace-parse.in b/utilities/ovs-backtrace-parse.in
new file mode 100755
index 0000000..3656f6f
--- /dev/null
+++ b/utilities/ovs-backtrace-parse.in
@@ -0,0 +1,100 @@
+#! @PYTHON@
+#
+# Copyright (c) 2012 Nicira, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import argparse
+import os
+import re
+import subprocess
+import sys
+
+import ovs.dirs
+
+has_addr2line = True
+addr2line_cache = {}
+
+
+def addr2line(ovs_vswitchd, addr):
+ global has_addr2line
+ global addr2line_cache
+
+ if not has_addr2line:
+ return ""
+
+ if addr in addr2line_cache:
+ return addr2line_cache[addr]
+
+ cmd = ["addr2line", "-f", "-s", "-e", ovs_vswitchd, addr]
+ try:
+ proc = subprocess.Popen(cmd, stdout=subprocess.PIPE,
+ stderr=subprocess.PIPE)
+ lines = proc.stdout.readlines()
+ failed = proc.returncode
+ except OSError:
+ failed = True
+
+ if failed:
+ has_addr2line = False
+ return ""
+
+ lines = [l.strip() for l in lines]
+ return " ".join(lines)
+
+
+def main():
+ description = """\
+Parses the output of ovs-appctl backtrace producing a more human readable
+result. Expected usage is for ovs-appctl backtrace to be piped in.
+
+ ovs-appctl backtrace | %(prog)s"""
+
+ formatter_class = argparse.RawDescriptionHelpFormatter
+ parser = argparse.ArgumentParser(description=description,
+ formatter_class=formatter_class)
+ parser.add_argument('--version', action='version', version='@VERSION@')
+ parser.add_argument('-e', '--exe', nargs=1, type=str,
+ help="path to ovs-vswitchd")
+ args = parser.parse_args()
+
+ if args.exe is not None:
+ ovs_vswitchd = args.exe[0]
+ else:
+ ovs_vswitchd = "@sbindir@/ovs-vswitchd"
+
+ trace_list = sys.stdin.read().strip().split("\n\n")
+
+ #Remove the first line from each trace.
+ trace_list = [trace[(trace.index("\n") + 1):] for trace in trace_list]
+
+ trace_map = {}
+ for trace in trace_list:
+ trace_map[trace] = trace_map.get(trace, 0) + 1
+
+ sorted_traces = sorted(trace_map.items(), key=(lambda x: x[1]),
+ reverse=True)
+ for trace, count in sorted_traces:
+ lines = trace.split("\n")
+ longest = max([len(l) for l in lines])
+
+ print "Backtrace Count: %d" % count
+ for line in trace.split("\n"):
+ match = re.search(r'\[(0x.*)]', line)
+ print "%s %s" % (line.ljust(longest), addr2line(ovs_vswitchd,
+ match.group(1)))
+ print
+
+
+if __name__ == "__main__":
+ main()
--
1.7.12
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