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#!/usr/bin/python
# Copyright (C) 2014 Red Hat Inc.
#
# This file is part of systemtap, and is free software. You can
# redistribute it and/or modify it under the terms of the GNU General
# Public License (GPL); either version 2, or (at your option) any
# later version.
import os
import sys
from config_opts import config_opts
def gen_files(dir, subset):
f = open('%s/probes.stp' % dir, 'w')
# Output the script
i = 0
while i < len(subset):
print >>f, ("global called%d" % (i))
i += 1
print >>f, "probe begin(-1)"
print >>f, "{"
i = 0
while i < len(subset):
print >>f, ("\tcalled%d <<< 0" % (i))
i += 1
print >>f, "}"
i = 0
while i < len(subset):
print >>f, ("probe kernel.function(\"%s\").call { called%d <<< 1 }" % (subset[i], i))
i += 1
print >>f, "probe end"
print >>f, "{"
i = 0
while i < len(subset):
print >>f, ("\tprintf(\"%%d %s\\n\", @sum(called%d))" % (subset[i], i))
i += 1
print >>f, "\tprintf(\"probe_module unloaded\\n\")"
print >>f, "}"
f.close()
def gen_module():
f = open(config_opts['probes_current'])
probes = f.readlines()
f.close()
if len(probes) == 0:
print >>sys.stderr, ("Error: no probe points in %s"
% config_opts['probes_current'])
return -1
# Cleanup each probe by stripping whitespace
i = 0
while i < len(probes):
probes[i] = probes[i].rstrip()
i += 1
# Generate necessary files
gen_files(os.getcwd(), probes)
# Try to build the module
os.system('rm -f ./probe_module.ko')
cmd = "stap -g --suppress-handler-errors --suppress-time-limits -vp4 -m probe_module probes.stp >build.log 2>&1"
print "Running", cmd
rc = os.system(cmd)
if os.WEXITSTATUS(rc) != 0:
print >>sys.stderr, "Error: stap failed, see build.log for details"
return -1
return 0
def main():
rc = gen_module()
sys.exit(rc)
if __name__ == "__main__":
main()
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