stackcount: Style fixes for linter (pep8)

tools/stackcount.py

@@ -96,10 +96,11 @@ def attach(self):
  pid=self.pid or -1)
  self.matched = self.bpf.num_open_tracepoints()
  elif self.type == "u":
- pass # Nothing to do -- attach already happened in `load`
+ pass  # Nothing to do -- attach already happened in `load`
 
  if self.matched == 0:
- raise Exception("No functions matched by pattern %s" % self.pattern)
+ raise Exception("No functions matched by pattern %s" %
+ self.pattern)
 
  def load(self):
  trace_count_text = """
@@ -142,11 +143,12 @@ def load(self):
  trace_count_text = trace_count_text.replace('GET_PID',
  'bpf_get_current_pid_tgid() >> 32')
  else:
- trace_count_text = trace_count_text.replace('GET_PID', '0xffffffff')
+ trace_count_text = trace_count_text.replace(
+ 'GET_PID', '0xffffffff')
 
  stack_flags = 'BPF_F_REUSE_STACKID'
  if not self.is_kernel_probe():
- stack_flags += '| BPF_F_USER_STACK' # can't do both U *and* K
+ stack_flags += '| BPF_F_USER_STACK'  # can't do both U *and* K
  trace_count_text = trace_count_text.replace('STACK_FLAGS', stack_flags)
 
  self.usdt = None
@@ -173,22 +175,22 @@ def load(self):
 
  if debug:
  print(bpf_text)
- self.bpf = BPF(text=bpf_text, usdt_contexts=
- [self.usdt] if self.usdt else [])
+ self.bpf = BPF(text=bpf_text,
+  usdt_contexts=[self.usdt] if self.usdt else [])
 
 class Tool(object):
  def __init__(self):
  examples = """examples:
- ./stackcount submit_bio  # count kernel stack traces for submit_bio
- ./stackcount -s ip_output  # show symbol offsets
- ./stackcount -sv ip_output  # show offsets and raw addresses (verbose)
- ./stackcount 'tcp_send*'  # count stacks for funcs matching tcp_send*
- ./stackcount -r '^tcp_send.*'  # same as above, using regular expressions
- ./stackcount -Ti 5 ip_output  # output every 5 seconds, with timestamps
- ./stackcount -p 185 ip_output  # count ip_output stacks for PID 185 only
- ./stackcount -p 185 c:malloc  # count stacks for malloc in PID 185
- ./stackcount t:sched:sched_fork  # count stacks for the sched_fork tracepoint
- ./stackcount -p 185 u:node:*  # count stacks for all USDT probes in node
+ ./stackcount submit_bio # count kernel stack traces for submit_bio
+ ./stackcount -s ip_output # show symbol offsets
+ ./stackcount -sv ip_output # show offsets and raw addresses (verbose)
+ ./stackcount 'tcp_send*' # count stacks for funcs matching tcp_send*
+ ./stackcount -r '^tcp_send.*' # same as above, using regular expressions
+ ./stackcount -Ti 5 ip_output # output every 5 seconds, with timestamps
+ ./stackcount -p 185 ip_output # count ip_output stacks for PID 185 only
+ ./stackcount -p 185 c:malloc # count stacks for malloc in PID 185
+ ./stackcount t:sched:sched_fork # count stacks for sched_fork tracepoint
+ ./stackcount -p 185 u:node:* # count stacks for all USDT probes in node
  """
  parser = argparse.ArgumentParser(
  description="Count events and their stack traces",
@@ -287,4 +289,3 @@ def run(self):
  traceback.print_exc()
  elif sys.exc_info()[0] is not SystemExit:
  print(sys.exc_info()[1])
-