This -
https://stackoverflow.com/questions/27476079/why-does-2to3-change-mydict-keys-to-listmydict-keys
-
might explain this "list" related changes by 2to3.
On Tuesday, February 18, 2020 at 8:42:47 AM UTC-5, Waldek Kozaczuk wrote:
>
> Hey,
>
> Thanks for the review.
>
> Let me first explain what my process was. At first, I just tried to submit
> Matt's changes with proper signoff. But then I decided to test it a bit and
> discovered some things were breaking. Now I do not think it was because of
> any problems in his original script, but mostly due to the fact that his
> changes were intertwined with other scripts and I had to change those.
> Also, pretty modules/openjdk8-from-host/module.py (was not there when Matt
> was changing) did not work And finally trace.py somehow came along. So here
> we go.
>
> As far as mechanics goes, I retained most of the Matt's patch as is and I
> believe he used the "Future" module. I used the 2to3 tool (more
> specifically 2to3-2.7 in my case) first and then manually fixed any
> problems I discovered. Most painful to fix was trace.py and all related
> ones (scripts/osv/*.py) which I tested quite thoroughly by running trace.py
> (I learned more about it which is great but probably way too much than what
> I wanted to know at this point ;-)). I also tested all other tests more
> implicitly by running scripts/build with some variations of image= (java is
> good as it exercises a lot) and fs=.
>
> But you are right that I could not thoroughly test loader.py (did many
> commands but not all). Shall we exclude it from this patch?
>
> Lastly, I am probably not the right person to do this upgrade exercise. I
> do not use Python daily so I am not an expert. Lack of compiler (aka
> 'complainer') did not make me very confident especially with those larger
> scripts. But I did not want Matt's work to go to waste. So here we go :-)
>
> On Tuesday, February 18, 2020 at 5:34:58 AM UTC-5, Nadav Har'El wrote:
>
> Thanks. I commented with a few concerns below. I'm only really worried
> about loader.py - the gdb script, which was already supposed to be working
> for both Python 2 and Python 3 (although we probably didn't test it
> recently), and I'm worried these changes are breaking it, rather than
> improving it - and it's difficult to test because these changes change all
> sorts of "osv" commands in gdb which I guess you didn't test individually.
>
> Shall we leave it out?
>
>
> I ask that you please at least try to run the affected scripts in Python3
> before "fixing" them at all. In particular, some scripts that had
> "/usr/bin/python" at the top (and not /usr/bin/python2) at the top already
> worked correctly for Python 3 (and Python 2) because some people already
> had python 3 as their default python (although, it is quite likely that we
> haven't tested this in a while so things broke).
>
> In most cases, I first ran 2to3 and then applied manual changes if I found
> any problems (like related to bytes vs str type of issue - really painful
> to find and fix). Indeed 2to3 is somewhat suspicious as it sometimes put
> extra parentheses when there were already (I manually removed those
> changes). Not sure about list-like related changes - all done by 2to3.
>
>
> --
> Nadav Har'El
> n...@scylladb.com
>
>
> On Mon, Feb 17, 2020 at 8:22 AM Waldemar Kozaczuk <jwkoz...@gmail.com>
> wrote:
>
> --- a/scripts/loader.py
> +++ b/scripts/loader.py
>
>
> Please make sure to test this file a bit, because it isn't part of the
> standard build or run.
> This is the script loaded automatically when you use gdb OSv.
>
> Also, I was always under the impression that this script already worked on
> both Python 2 and
> Python 3, because we had no idea what gdb runs for us (the "#!" in the top
> of this script isn't relevant, right?)?
>
> Shall we change at least this '#!/usr/bin/python2' to '#!/usr/bin/python'
> then?
>
>
> @@ -1,4 +1,4 @@
> -#!/usr/bin/python2
> +#!/usr/bin/python3
>
> import gdb
> import re
> @@ -37,8 +37,8 @@ def phys_cast(addr, type):
>
> def values(_dict):
> if hasattr(_dict, 'viewvalues'):
> - return _dict.viewvalues()
> - return _dict.values()
> + return _dict.values()
>
>
> This doesn't look right - you check if there is a viewvalues() function
> and then call values()?
> Maybe the whole "hasattr" check isn't needed on Python 2 any more?
>
> + return list(_dict.values())
>
>
> I wonder why you need to convert it to a list - what's wrong with a
> generator which isn't officially a list? Did this solve a real problem, or
> some automatic converter suggested it?
>
> Changed by 2to3.
>
>
>
> def read_vector(v):
> impl = v['_M_impl']
> @@ -426,19 +426,19 @@ class osv_zfs(gdb.Command):
>
> print ("\n:: ARC SIZES ::")
> print ("\tCurrent size: %d (%d MB)" %
> - (arc_size, arc_size / 1024 / 1024))
> + (arc_size, arc_size // 1024 // 1024))
> print ("\tTarget size: %d (%d MB)" %
> - (arc_target_size, arc_target_size / 1024 / 1024))
> + (arc_target_size, arc_target_size // 1024 // 1024))
> print ("\tMin target size: %d (%d MB)" %
> - (arc_min_size, arc_min_size / 1024 / 1024))
> + (arc_min_size, arc_min_size // 1024 // 1024))
> print ("\tMax target size: %d (%d MB)" %
> - (arc_max_size, arc_max_size / 1024 / 1024))
> + (arc_max_size, arc_max_size // 1024 // 1024))
>
> print ("\n:: ARC SIZE BREAKDOWN ::")
> print ("\tMost recently used cache size: %d (%d MB) (%.2f%%)" %
> - (arc_mru_size, arc_mru_size / 1024 / 1024, arc_mru_perc))
> + (arc_mru_size, arc_mru_size // 1024 // 1024, arc_mru_perc))
> print ("\tMost frequently used cache size: %d (%d MB) (%.2f%%)" %
> - (arc_mfu_size, arc_mfu_size / 1024 / 1024, arc_mfu_perc))
> + (arc_mfu_size, arc_mfu_size // 1024 // 1024, arc_mfu_perc))
>
> # Cache efficiency
> arc_hits = get_stat_by_name(arc_stats_struct, arc_stats_cast,
> 'arcstat_hits')
> @@ -618,7 +618,7 @@ class osv_mmap(gdb.Command):
> end = ulong(vma['_range']['_end'])
> flags = flagstr(ulong(vma['_flags']))
> perm = permstr(ulong(vma['_perm']))
> - size = '{:<16}'.format('[%s kB]' % (ulong(end - start)/1024))
> + size = '{:<16}'.format('[%s kB]' % (ulong(end - start)//1024))
>
> if 'F' in flags:
> file_vma =
> vma.cast(gdb.lookup_type('mmu::file_vma').pointer())
> @@ -648,7 +648,7 @@ class osv_vma_find(gdb.Command):
> if start <= addr and end > addr:
> flags = flagstr(ulong(vma['_flags']))
> perm = permstr(ulong(vma['_perm']))
> - size = '{:<16}'.format('[%s kB]' % (ulong(end -
> start)/1024))
> + size = '{:<16}'.format('[%s kB]' % (ulong(end -
> start)//1024))
> print('0x%016x -> vma 0x%016x' % (addr, vma_addr))
> print('0x%016x 0x%016x %s flags=%s perm=%s' % (start,
> end, size, flags, perm))
> break
> @@ -671,7 +671,7 @@ def ulong(x):
> def to_int(gdb_value):
> if hasattr(globals()['__builtins__'], 'long'):
> # For GDB with python2
> - return long(gdb_value)
> + return int(gdb_value)
>
>
> Again, this change is wrong, was it automated?
> The whole point of this code was to support *both* python 2
> and python 3, and now we go breaking the old python 2 code,
> but not even removing the if :-)
>
> return int(gdb_value)
>
> class osv_syms(gdb.Command):
> @@ -751,7 +751,7 @@ def get_base_class_offset(gdb_type, base_class_name):
> name_pattern = re.escape(base_class_name) + "(<.*>)?$"
> for field in gdb_type.fields():
> if field.is_base_class and re.match(name_pattern, field.name):
> - return field.bitpos / 8
> + return field.bitpos // 8
>
> def derived_from(type, base_class):
> return len([x for x in type.fields()
> @@ -808,11 +808,8 @@ class intrusive_list:
> yield node_ptr.cast(self.node_type.pointer()).dereference()
> hook = hook['next_']
>
> - def __nonzero__(self):
> - return self.root['next_'] != self.root.address
> -
>
>
> Any reason to remove this? (I don't know why it was needed, but why
> remove?)
>
> Changed by 2to3.
>
>
> def __bool__(self):
> - return self.__nonzero__()
> + return self.root['next_'] != self.root.address
>
> class vmstate(object):
> def __init__(self):
> @@ -832,7 +829,7 @@ class vmstate(object):
> self.cpu_list = cpu_list
>
> def load_thread_list(self):
> - threads = map(gdb.Value.dereference,
> unordered_map(gdb.lookup_global_symbol('sched::thread_map').value()))
> + threads = list(map(gdb.Value.dereference,
> unordered_map(gdb.lookup_global_symbol('sched::thread_map').value())))
>
>
> I don't understand why this change is needed... sorted() should work just
> fine on an interable, it doesn't need a list as far as I know.
> Did something now work without this change?
>
> Changed by 2to3.
>
>
> self.thread_list = sorted(threads, key=lambda x: int(x["_id"]))
>
> def cpu_from_thread(self, thread):
> @@ -896,7 +893,7 @@ def show_thread_timers(t):
> gdb.write(' timers:')
> for timer in timer_list:
> expired = '*' if timer['_state'] == timer_state_expired else
> ''
> - expiration = int(timer['_time']['__d']['__r']) / 1.0e9
> + expiration = int(timer['_time']['__d']['__r']) // 1.0e9
> gdb.write(' %11.9f%s' % (expiration, expired))
> gdb.write('\n')
>
> @@ -911,7 +908,7 @@ class ResolvedFrame:
> self.frame = frame
> self.file_name = file_name
> self.line = line
> - self.func_name = func_name
> + self.__name__ = func_name
>
>
> Why rename this field??
>
> Changed by 2to3.
>
>
>
> def traverse_resolved_frames(frame):
> while frame:
> @@ -989,14 +986,14 @@ class osv_info_threads(gdb.Command):
> function_whitelist = [sched_thread_join]
>
> def is_interesting(resolved_frame):
> - is_whitelisted = resolved_frame.func_name in
> function_whitelist
> + is_whitelisted = resolved_frame.__name__ in
> function_whitelist
> is_blacklisted =
> os.path.basename(resolved_frame.file_name) in file_blacklist
> return is_whitelisted or not is_blacklisted
>
> fr = find_or_give_last(is_interesting,
> traverse_resolved_frames(newest_frame))
>
> if fr:
> - location = '%s at %s:%s' % (fr.func_name,
> strip_dotdot(fr.file_name), fr.line)
> + location = '%s at %s:%s' % (fr.__name__,
> strip_dotdot(fr.file_name), fr.line)
> else:
> location = '??'
>
> @@ -1009,7 +1006,7 @@ class osv_info_threads(gdb.Command):
> )
> )
>
> - if fr and fr.func_name == sched_thread_join:
> + if fr and fr.__name__ == sched_thread_join:
> gdb.write("\tjoining on %s\n" %
> fr.frame.read_var("this"))
>
> show_thread_timers(t)
> @@ -1176,6 +1173,7 @@ def all_traces():
> max_trace = ulong(trace_buffer['_size'])
>
> if not trace_log_base:
> + print('!!! Could not find any trace data! Make sure "--trace"
> option matches some tracepoints.')
> raise StopIteration
>
> trace_log = inf.read_memory(trace_log_base, max_trace)
> @@ -1214,7 +1212,7 @@ def all_traces():
> unpacker.align_up(8)
> yield Trace(tp, Thread(thread, thread_name), time, cpu, data,
> backtrace=backtrace)
>
> - iters = map(lambda cpu: one_cpu_trace(cpu), values(state.cpu_list))
> + iters = [one_cpu_trace(cpu) for cpu in values(state.cpu_list)]
>
> return heapq.merge(*iters)
>
> def save_traces_to_file(filename):
> @@ -1281,7 +1279,7 @@ def show_leak():
> gdb.flush()
> allocs = []
> for i in range(size_allocations):
> - newpercent = '%2d%%' % round(100.0*i/(size_allocations-1))
> + newpercent = '%2d%%' % round(100.0*i//(size_allocations-1))
>
>
> It seems like *all* divisions in this file were converted to integer
> divisions. Are you sure this was the intent in all of them?
> Here in particular, it's pretty clear by the 100.0 that floating point
> division was intended!
>
> Changed by 2to3. But you are right this does not look correct.
>
>
>
>
> if newpercent != percent:
> percent = newpercent
> gdb.write('\b\b\b%s' % newpercent)
> @@ -1343,10 +1341,10 @@ def show_leak():
> allocations=cur_n,
> minsize=cur_min_size,
> maxsize=cur_max_size,
> - avgsize=cur_total_size/cur_n,
> + avgsize=cur_total_size//cur_n,
>
> minbirth=cur_first_seq,
> maxbirth=cur_last_seq,
> - avgbirth=cur_total_seq/cur_n,
> + avgbirth=cur_total_seq//cur_n,
> callchain=callchain)
> records.append(r)
> cur_n = 0
> @@ -1538,7 +1536,7 @@ class osv_percpu(gdb.Command):
> gdb.write('%s\n'%e)
> return
> percpu_addr = percpu.address
> - for cpu in vmstate().cpu_list.values():
> + for cpu in list(vmstate().cpu_list.values()):
> gdb.write("CPU %d:\n" % cpu.id)
> base = cpu.obj['percpu_base']
> addr = base+to_int(percpu_addr)
>
>
>
>
> diff --git a/scripts/module.py b/scripts/module.py
> index 548dd0c7..c253968c 100755
> --- a/scripts/module.py
> +++ b/scripts/module.py
> @@ -1,4 +1,4 @@
> -#!/usr/bin/python
> +#!/usr/bin/python3
>
> import re
> import os
> @@ -226,7 +226,7 @@ def build(args):
> else:
> print(prefix)
>
> - for module, run_config_name in modules_to_run.items():
> + for module, run_config_name in list(modules_to_run.items()):
>
>
> This smells like an automated change - I don't see any reason why this
> list is needed!
>
> Can you please review all these changes? Better yet, just run the code
> with python3 and see if anything *really* doesn't work...
>
> Will do.
>
>
>
>
> diff --git a/scripts/osv/prof.py b/scripts/osv/prof.py
> index 95db15b8..465a223f 100644
> --- a/scripts/osv/prof.py
> +++ b/scripts/osv/prof.py
> @@ -51,7 +51,7 @@ time_units = [
> ]
>
> def parse_time_as_nanos(text, default_unit='ns'):
> - for level, name in sorted(time_units, key=lambda (level, name):
> -len(name)):
> + for level, name in sorted(time_units, key=lambda level_name:
> -len(level_name[1])):
>
>
> I don't understand the changes in this file, they don't look like simple
> syntax changes... Did you review them?
>
> 2to3. I may have not tested trace.py with min_duration argument.
>
>
> if text.endswith(name):
> return float(text.rstrip(name)) * level
> for level, name in time_units:
> @@ -60,7 +60,7 @@ def parse_time_as_nanos(text, default_unit='ns'):
> raise Exception('Unknown unit: ' + default_unit)
>
> def format_time(time, format="%.2f %s"):
> - for level, name in sorted(time_units, key=lambda (level, name):
> -level):
> + for level, name in sorted(time_units, key=lambda level_name1:
> -level_name1[0]):
> if time >= level:
> return format % (float(time) / level, name)
> return str(time)
> @@ -207,10 +207,16 @@ class timed_trace_producer(object):
> self.last_time = None
>
> def __call__(self, sample):
> + if not sample.time:
> + return
> +
> if not sample.cpu in self.earliest_trace_per_cpu:
> self.earliest_trace_per_cpu[sample.cpu] = sample
>
> - self.last_time = max(self.last_time, sample.time)
> + if not self.last_time:
> + self.last_time = sample.time
> + else:
> + self.last_time = max(self.last_time, sample.time)
>
> matcher = self.matcher_by_name.get(sample.name, None)
> if not matcher:
> @@ -239,7 +245,7 @@ class timed_trace_producer(object):
> return trace.TimedTrace(entry_trace, duration)
>
> def finish(self):
> - for sample in self.open_samples.itervalues():
> + for sample in self.open_samples.values():
> duration = self.last_time - sample.time
> yield trace.TimedTrace(sample, duration)
>
> @@ -275,7 +281,7 @@ def get_idle_profile(traces):
>
> def trim_samples(cpu, end_time):
> if cpu.idle:
> - for w in cpu.waits.values():
> + for w in list(cpu.waits.values()):
> begin = max(w.time, cpu.idle.time)
> yield ProfSample(begin, w.cpu, w.thread, w.backtrace,
> resident_time=end_time - begin)
>
> @@ -295,7 +301,7 @@ def get_idle_profile(traces):
>
> last = t
>
> - for cpu in cpus.values():
> + for cpu in list(cpus.values()):
> for s in trim_samples(cpu, t.time):
> yield s
>
> @@ -402,7 +408,7 @@ def print_profile(samples, symbol_resolver,
> caller_oriented=False,
> if not order:
> order = lambda node: (-node.resident_time, -node.hit_count)
>
> - for group, tree_root in sorted(groups.iteritems(), key=lambda
> (thread, node): order(node)):
> + for group, tree_root in sorted(iter(groups.items()), key=lambda
> thread_node: order(thread_node[1])):
> collapse_similar(tree_root)
>
> if max_levels:
> +++ b/scripts/osv/trace.py
> @@ -65,7 +65,12 @@ class TimeRange(object):
> return self.end - self.begin
>
> def intersection(self, other):
> - begin = max(self.begin, other.begin)
> + if not self.begin:
> + begin = other.begin
> + elif not other.begin:
> + begin = self.begin
> + else:
> + begin = max(self.begin, other.begin)
>
> if self.end is None:
> end = other.end
> @@ -143,11 +148,11 @@ class Trace:
> class TimedTrace:
> def __init__(self, trace, duration=None):
> self.trace = trace
> - self.duration = duration
> + self.duration_ = duration
>
> @property
> def duration(self):
> - return self.duration
> + return self.duration_
>
> @property
> def time(self):
> @@ -183,6 +188,8 @@ def do_split_format(format_str):
>
> _split_cache = {}
> def split_format(format_str):
> + if not format_str:
> + return []
> result = _split_cache.get(format_str, None)
> if not result:
> result = list(do_split_format(format_str))
> @@ -190,7 +197,7 @@ def split_format(format_str):
> return result
>
> formatters = {
> - '*': lambda bytes: '{' + ' '.join('%02x' % ord(b) for b in bytes) +
> '}'
> + '*': lambda bytes: '{' + ' '.join('%02x' % b for b in bytes) + '}'
>
>
> Hmm, doesn't ord(b) work in Python3 any more?
>
>
> Python 2:
> >>> f = lambda bytes: '{' + ' '.join('%02x' % ord(b) for b in bytes) + '}'
> >>> f(b'test')
> '{74 65 73 74}'
>
> Python 3:
> >>> f = lambda bytes: '{' + ' '.join('%02x' % ord(b) for b in bytes) + '}'
> >>> f(b'test')
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File "<stdin>", line 1, in <lambda>
> File "<stdin>", line 1, in <genexpr>
> TypeError: ord() expected string of length 1, but int found
>
> f2 = lambda bytes: '{' + ' '.join('%02x' % b for b in bytes) + '}'
> >>> f2(b'test')
> '{74 65 73 74}'
>
> The ord still works but in the end this lambda breaks.
>
>
> }
>
> def get_alignment_of(fmt):
> @@ -238,16 +245,15 @@ class SlidingUnpacker:
> size = struct.calcsize(fmt)
> val, = struct.unpack_from(fmt,
> self.buffer[self.offset:self.offset+size])
> self.offset += size
> - values.append(val)
> + if fmt.startswith('50p'):
> + values.append(val.decode('utf-8'))
> + else:
> + values.append(val)
>
> return tuple(values)
>
> - def __nonzero__(self):
> - return self.offset < len(self.buffer)
> -
> - # Python3
> def __bool__(self):
> - return self.__nonzero__()
> + return self.offset < len(self.buffer)
>
> class WritingPacker:
> def __init__(self, writer):
> @@ -270,7 +276,10 @@ class WritingPacker:
> if fmt == '*':
> self.pack_blob(arg)
> else:
> - self.writer(struct.pack(fmt, arg))
> + if fmt == '50p':
> + self.writer(struct.pack(fmt, arg.encode('utf-8')))
> + else:
> + self.writer(struct.pack(fmt, arg))
> self.offset += struct.calcsize(fmt)
>
> def pack_blob(self, arg):
> @@ -298,7 +307,7 @@ class TraceDumpReaderBase :
> self.endian = '<'
> self.file = open(filename, 'rb')
> try:
> - tag = self.file.read(4)
> + tag = self.file.read(4).decode()
> if tag == "OSVT":
> endian = '>'
> elif tag != "TVSO":
> @@ -347,7 +356,7 @@ class TraceDumpReaderBase :
>
> def readString(self):
> len = self.read('H')
> - return self.file.read(len)
> + return self.file.read(len).decode()
>
> class TraceDumpReader(TraceDumpReaderBase) :
> def __init__(self, filename):
> @@ -378,7 +387,7 @@ class TraceDumpReader(TraceDumpReaderBase) :
> sig = ""
> for j in range(0, n_args):
> arg_name = self.readString()
> - arg_sig = self.file.read(1)
> + arg_sig = self.file.read(1).decode()
> if arg_sig == 'p':
> arg_sig = '50p'
> sig += arg_sig
> @@ -405,7 +414,7 @@ class TraceDumpReader(TraceDumpReaderBase) :
>
> backtrace = None
> if flags & 1:
> - backtrace = filter(None, unpacker.unpack('Q' *
> self.backtrace_len))
> + backtrace = [_f for _f in unpacker.unpack('Q' *
> self.backtrace_len) if _f]
>
> data = unpacker.unpack(tp.signature)
> unpacker.align_up(8)
> @@ -414,7 +423,7 @@ class TraceDumpReader(TraceDumpReaderBase) :
> yield last_trace
>
> def traces(self):
> - iters = map(lambda data: self.oneTrace(data), self.trace_buffers)
> + iters = [self.oneTrace(data) for data in self.trace_buffers]
> return heapq.merge(*iters)
>
>
> @@ -523,7 +532,7 @@ def read(buffer_view):
>
> while unpacker:
> tp_key, thread_ptr, thread_name, time, cpu =
> unpacker.unpack('QQ16sQI')
> - thread_name = thread_name.rstrip('\0')
> + thread_name = thread_name.rstrip(b'\0').decode('utf-8')
> tp = tracepoints[tp_key]
>
> backtrace = []
> @@ -551,7 +560,7 @@ def write(traces, writer):
> trace.time, trace.cpu)
>
> if trace.backtrace:
> - for frame in filter(None, trace.backtrace):
> + for frame in [_f for _f in trace.backtrace if _f]:
> packer.pack('Q', frame)
> packer.pack('Q', 0)
>
> diff --git a/scripts/osv/tree.py b/scripts/osv/tree.py
> index 594b00e2..86345157 100644
> --- a/scripts/osv/tree.py
> +++ b/scripts/osv/tree.py
> @@ -18,11 +18,11 @@ class TreeNode(object):
>
> def squash_child(self):
> assert self.has_only_one_child()
> - self.children_by_key =
> next(self.children_by_key.itervalues()).children_by_key
> + self.children_by_key =
> next(iter(self.children_by_key.values())).children_by_key
>
> @property
> def children(self):
> - return self.children_by_key.itervalues()
> + return iter(self.children_by_key.values())
>
> def has_only_one_child(self):
> return len(self.children_by_key) == 1
> diff --git a/scripts/run.py b/scripts/run.py
> index 9ab8d86f..f4452345 100755
> --- a/scripts/run.py
> +++ b/scripts/run.py
> @@ -1,5 +1,5 @@
> -#!/usr/bin/env python
> -from __future__ import print_function
> +#!/usr/bin/env python3
> +
> import subprocess
> import sys
> import argparse
> diff --git a/scripts/setup.py b/scripts/setup.py
> index 2a7f1c18..a58132ab 100755
> --- a/scripts/setup.py
> +++ b/scripts/setup.py
> @@ -1,8 +1,8 @@
> -#!/usr/bin/python2
> +#!/usr/bin/python3
>
> # set up a development environment for OSv. Run as root.
>
> -import sys, platform, argparse
> +import sys, distro, argparse
> import subprocess
>
> standard_ec2_packages = ['python-pip', 'wget']
> @@ -319,11 +319,11 @@ parser.add_argument("-t", "--test",
> action="store_true",
> help="install packages required by testing tools")
> cmdargs = parser.parse_args()
>
> -(name, version, id) = platform.linux_distribution()
> +(name, version, id) = distro.linux_distribution()
>
> for distro in distros:
> if type(distro.name) == type([]):
> - dname = filter(lambda n: name.startswith(n), distro.name)
> + dname = [n for n in distro.name if name.startswith(n)]
> if len(dname):
> distro.name = dname[0]
> else:
> @@ -349,5 +349,5 @@ for distro in distros:
> print ('Your distribution %s version %s is not supported by this
> script' % (name, version))
> sys.exit(1)
>
> -print 'Your distribution is not supported by this script.'
> +print('Your distribution is not supported by this script.')
> sys.exit(2)
> diff --git a/scripts/test.py b/scripts/test.py
> index 02eb4b55..0f9c07c1 100755
> --- a/scripts/test.py
> +++ b/scripts/test.py
> @@ -1,4 +1,4 @@
> -#!/usr/bin/env python
> +#!/usr/bin/env python3
> import atexit
> import subprocess
> import argparse
> @@ -81,7 +81,7 @@ def is_not_skipped(test):
> return test.name not in blacklist
>
> def run_tests_in_single_instance():
> - run(filter(lambda test: not isinstance(test, TestRunnerTest), tests))
> + run([test for test in tests if not isinstance(test, TestRunnerTest)])
>
> blacklist_tests = ' '.join(blacklist)
> args = run_py_args + ["-s", "-e", "/testrunner.so -b %s" %
> (blacklist_tests)]
> @@ -103,7 +103,7 @@ def pluralize(word, count):
>
> def make_export_and_conf():
> export_dir = tempfile.mkdtemp(prefix='share')
> - os.chmod(export_dir, 0777)
> + os.chmod(export_dir, 0o777)
> (conf_fd, conf_path) = tempfile.mkstemp(prefix='export')
> conf = os.fdopen(conf_fd, "w")
> conf.write("%s 127.0.0.1(insecure,rw)\n" % export_dir)
> @@ -155,12 +155,12 @@ def run_tests():
> "/tst-nfs.so --server 192.168.122.1 --share %s" %
> export_dir) ]
>
> - line = proc.stdout.readline()
> + line = proc.stdout.readline().decode()
> while line:
> print(line)
> if "/tmp" in line:
> break
> - line = proc.stdout.readline()
> + line = proc.stdout.readline().decode()
>
>
> run(tests_to_run)
> diff --git a/scripts/tests/test_app.py b/scripts/tests/test_app.py
> index 27112ff7..1738e755 100755
> --- a/scripts/tests/test_app.py
> +++ b/scripts/tests/test_app.py
> @@ -1,7 +1,6 @@
> -#!/usr/bin/python
> +#!/usr/bin/python3
> from testing import *
> import argparse
> -import subprocess
> from time import sleep
>
> def run(command, hypervisor_name, image_path=None, line=None,
> guest_port=None, host_port=None, input_lines=[], kill_app=False):
> diff --git a/scripts/tests/test_app_with_test_script.py
> b/scripts/tests/test_app_with_test_script.py
> index 2ab1b731..8a2c7295 100755
> --- a/scripts/tests/test_app_with_test_script.py
> +++ b/scripts/tests/test_app_with_test_script.py
> @@ -1,4 +1,4 @@
> -#!/usr/bin/python
> +#!/usr/bin/python3
> from testing import *
> import argparse
> import runpy
> diff --git a/scripts/tests/test_http_app_with_curl_and_ab.py
> b/scripts/tests/test_http_app_with_curl_and_ab.py
> index 067fcc83..9d613d01 100755
> --- a/scripts/tests/test_http_app_with_curl_and_ab.py
> +++ b/scripts/tests/test_http_app_with_curl_and_ab.py
> @@ -1,11 +1,11 @@
> -#!/usr/bin/python
> +#!/usr/bin/python3
> from testing import *
> import argparse
> import subprocess
> from time import sleep
>
> def check_with_curl(url, expected_http_line):
> - output = subprocess.check_output(["curl", "-s", url])
> + output = subprocess.check_output(["curl", "-s", url]).decode('utf-8')
> print(output)
> if expected_http_line not in output:
> print("FAILED curl: wrong output")
> @@ -39,9 +39,9 @@ def run(command, hypervisor_name, host_port, guest_port,
> http_path, expected_htt
> check_with_curl(app_url, expected_http_line)
>
> if no_keep_alive:
> - output = subprocess.check_output(["ab", "-l", "-c",
> str(concurrency), "-n", str(count), app_url]).split('\n')
> + output = subprocess.check_output(["ab", "-l", "-c",
> str(concurrency), "-n", str(count), app_url]).decode('utf-8').split('\n')
> else:
> - output = subprocess.check_output(["ab", "-l", "-k", "-c",
> str(concurrency), "-n", str(count), app_url]).split('\n')
> + output = subprocess.check_output(["ab", "-l", "-k", "-c",
> str(concurrency), "-n", str(count), app_url]).decode('utf-8').split('\n')
>
> failed_requests = 1
> complete_requests = 0
> @@ -74,11 +74,11 @@ def run(command, hypervisor_name, host_port,
> guest_port, http_path, expected_htt
> success = False
>
> if failed_requests > 0:
> - print("FAILED ab - encountered failed requests: %d" %
> failed_requests)
> + print("FAILED ab - encountered failed requests: %d" %
> failed_requests)
> success = False
>
> if complete_requests < count:
> - print("FAILED ab - too few complete requests : %d ? %d" %
> (complete_requests, count))
> + print("FAILED ab - too few complete requests : %d ? %d" %
> (complete_requests, count))
> success = False
>
> if success:
> diff --git a/scripts/tests/testing.py b/scripts/tests/testing.py
> index c5249753..c3aaf218 100644
> --- a/scripts/tests/testing.py
> +++ b/scripts/tests/testing.py
> @@ -133,7 +133,7 @@ class SupervisedProcess:
> self.cv.release()
>
> line = ''
> - ch_bytes = ''
> + ch_bytes = bytes()
> while True:
> ch_bytes = ch_bytes + self.process.stdout.read(1)
> try:
> @@ -144,7 +144,7 @@ class SupervisedProcess:
> if ch == '\n':
> append_line(line)
> line = ''
> - ch_bytes = ''
> + ch_bytes = bytes()
> except UnicodeError:
> continue
>
> diff --git a/scripts/trace.py b/scripts/trace.py
> index 34cfb2ab..71dc47d5 100755
> --- a/scripts/trace.py
> +++ b/scripts/trace.py
> @@ -1,4 +1,4 @@
> -#!/usr/bin/env python2
> +#!/usr/bin/env python3
> import sys
> import errno
> import argparse
> @@ -13,6 +13,7 @@ from collections import defaultdict
> from osv import trace, debug, prof
> from osv.client import Client
> import memory_analyzer
> +from functools import reduce
>
> class InvalidArgumentsException(Exception):
> def __init__(self, message):
> @@ -114,7 +115,7 @@ def list_trace(args):
> with get_trace_reader(args) as reader:
> for t in reader.get_traces():
> if t.time in time_range:
> - print t.format(backtrace_formatter,
> data_formatter=data_formatter)
> + print(t.format(backtrace_formatter,
> data_formatter=data_formatter))
>
> def mem_analys(args):
> mallocs = {}
> @@ -164,7 +165,7 @@ def add_profile_options(parser):
> add_time_slicing_options(parser)
> group = parser.add_argument_group('profile options')
> group.add_argument("-r", "--caller-oriented", action='store_true',
> help="change orientation to caller-based; reverses order of frames")
> - group.add_argument("-g", "--group-by", choices=groupers.keys(),
> default='none', help="group samples by given criteria")
> + group.add_argument("-g", "--group-by", choices=list(groupers.keys()),
> default='none', help="group samples by given criteria")
> group.add_argument("--function", action='store', help="use given
> function as tree root")
> group.add_argument("--min-duration", action='store', help="show only
> nodes with resident time not shorter than this, eg: 200ms")
> add_backtrace_options(group)
> @@ -236,7 +237,7 @@ def show_profile(args, sample_producer):
>
> def node_filter(*args):
> for filter in node_filters:
> - if not filter(*args):
> + if not list(filter(*args)):
> return False
> return True
>
> @@ -276,7 +277,7 @@ def extract(args):
> stderr=subprocess.STDOUT)
> _stdout, _ = proc.communicate()
> if proc.returncode or not os.path.exists(args.tracefile):
> - print(_stdout)
> + print(_stdout.decode())
> sys.exit(1)
> else:
> print("error: %s not found" % (elf_path))
> @@ -332,8 +333,10 @@ def write_sample_to_pcap(sample, pcap_writer):
> }
>
> pkt = dpkt.ethernet.Ethernet()
> - pkt.data = sample.data[1]
> pkt.type = eth_types[proto]
> + pkt.src = b''
> + pkt.dst = b''
> + pkt.data = sample.data[1]
> pcap_writer.writepkt(pkt, ts=ts)
>
> def format_packet_sample(sample):
> @@ -343,7 +346,7 @@ def format_packet_sample(sample):
> pcap = dpkt.pcap.Writer(proc.stdin)
> write_sample_to_pcap(sample, pcap)
> pcap.close()
> - assert(proc.stdout.readline() == "reading from file -, link-type
> EN10MB (Ethernet)\n")
> + assert(proc.stdout.readline().decode() == "reading from file -,
> link-type EN10MB (Ethernet)\n")
> packet_line = proc.stdout.readline().rstrip()
> proc.wait()
> return packet_line
> @@ -361,7 +364,7 @@ def pcap_dump(args, target=None):
> needs_dpkt()
>
> if not target:
> - target = sys.stdout
> + target = sys.stdout.buffer
>
> pcap_file = dpkt.pcap.Writer(target)
> try:
> @@ -439,7 +442,10 @@ def print_summary(args, printer=sys.stdout.write):
> else:
> min_time = min(min_time, t.time)
>
> - max_time = max(max_time, t.time)
> + if not max_time:
> + max_time = t.time
> + else:
> + max_time = max(max_time, t.time)
>
> if args.timed:
> timed = timed_producer(t)
> @@ -450,42 +456,42 @@ def print_summary(args, printer=sys.stdout.write):
> timed_samples.extend((timed_producer.finish()))
>
> if count == 0:
> - print "No samples"
> + print("No samples")
> return
>
> - print "Collected %d samples spanning %s" % (count,
> prof.format_time(max_time - min_time))
> + print("Collected %d samples spanning %s" % (count,
> prof.format_time(max_time - min_time)))
>
> - print "\nTime ranges:\n"
> - for cpu, r in sorted(cpu_time_ranges.items(), key=lambda (c, r):
> r.min):
> - print " CPU 0x%02d: %s - %s = %10s" % (cpu,
> + print("\nTime ranges:\n")
> + for cpu, r in sorted(list(cpu_time_ranges.items()), key=lambda c_r:
> c_r[1].min):
> + print(" CPU 0x%02d: %s - %s = %10s" % (cpu,
> trace.format_time(r.min),
> trace.format_time(r.max),
> - prof.format_time(r.max - r.min))
> + prof.format_time(r.max - r.min)))
>
> - max_name_len = reduce(max, map(lambda tp: len(tp.name),
> count_per_tp.iterkeys()))
> + max_name_len = reduce(max, [len(tp.name) for tp in
> iter(count_per_tp.keys())])
> format = " %%-%ds %%8s" % (max_name_len)
> - print "\nTracepoint statistics:\n"
> - print format % ("name", "count")
> - print format % ("----", "-----")
> + print("\nTracepoint statistics:\n")
> + print(format % ("name", "count"))
> + print(format % ("----", "-----"))
>
> - for tp, count in sorted(count_per_tp.iteritems(), key=lambda (tp,
> count): tp.name):
> - print format % (tp.name, count)
> + for tp, count in sorted(iter(count_per_tp.items()), key=lambda
> tp_count: tp_count[0].name):
> + print(format % (tp.name, count))
>
> if args.timed:
> format = " %-20s %8s %8s %8s %8s %8s %8s %8s %15s"
> - print "\nTimed tracepoints [ms]:\n"
> + print("\nTimed tracepoints [ms]:\n")
>
> - timed_samples = filter(lambda t:
> t.time_range.intersection(time_range), timed_samples)
> + timed_samples = [t for t in timed_samples if
> t.time_range.intersection(time_range)]
>
> if not timed_samples:
> - print " None"
> + print(" None")
> else:
> - print format % ("name", "count", "min", "50%", "90%", "99%",
> "99.9%", "max", "total")
> - print format % ("----", "-----", "---", "---", "---", "---",
> "-----", "---", "-----")
> + print(format % ("name", "count", "min", "50%", "90%", "99%",
> "99.9%", "max", "total"))
> + print(format % ("----", "-----", "---", "---", "---", "---",
> "-----", "---", "-----"))
>
> - for name, traces in
> get_timed_traces_per_function(timed_samples).iteritems():
> + for name, traces in
> get_timed_traces_per_function(timed_samples).items():
> samples =
> sorted(list((t.time_range.intersection(time_range).length() for t in
> traces)))
> - print format % (
> + print(format % (
> name,
> len(samples),
> format_duration(get_percentile(samples, 0)),
> @@ -494,9 +500,9 @@ def print_summary(args, printer=sys.stdout.write):
> format_duration(get_percentile(samples, 0.99)),
> format_duration(get_percentile(samples, 0.999)),
> format_duration(get_percentile(samples, 1)),
> - format_duration(sum(samples)))
> + format_duration(sum(samples))))
>
> - print
> + print()
>
> def list_cpu_load(args):
> load_per_cpu = {}
> @@ -550,7 +556,7 @@ def list_timed(args):
>
> for timed in timed_traces:
> t = timed.trace
> - print '0x%016x %-15s %2d %20s %7s %-20s %s%s' % (
> + print('0x%016x %-15s %2d %20s %7s %-20s %s%s' % (
> t.thread.ptr,
> t.thread.name,
> t.cpu,
> @@ -558,7 +564,7 @@ def list_timed(args):
> trace.format_duration(timed.duration),
> t.name,
> trace.Trace.format_data(t),
> - bt_formatter(t.backtrace))
> + bt_formatter(t.backtrace)))
>
> def list_wakeup_latency(args):
> bt_formatter = get_backtrace_formatter(args)
> @@ -575,9 +581,9 @@ def list_wakeup_latency(args):
> return "%4.6f" % (float(nanos) / 1e6)
>
> if not args.no_header:
> - print '%-18s %-15s %3s %20s %13s %9s %s' % (
> + print('%-18s %-15s %3s %20s %13s %9s %s' % (
> "THREAD", "THREAD-NAME", "CPU", "TIMESTAMP[s]", "WAKEUP[ms]",
> "WAIT[ms]", "BACKTRACE"
> - )
> + ))
>
> with get_trace_reader(args) as reader:
> for t in reader.get_traces():
> @@ -594,14 +600,14 @@ def list_wakeup_latency(args):
> if t.cpu == waiting_thread.wait.cpu:
>
> ...
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