mirror of
https://github.com/mailscope/kumomta.git
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Wez Furlong
77 lines
1.8 KiB
Python
Executable File
77 lines
1.8 KiB
Python
Executable File
#!/usr/bin/env python3
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import re
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import sys
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# This script reads the `bt all` output from lldb and groups
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# threads by similar backtrace, making it a little easier
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# to reason about the state described by the trace
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IS_THREAD = re.compile("^[* ] thread #\d+")
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EPOLL = re.compile("epoll_wait\\(.+\\)")
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def process_bt(lines):
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threads = {}
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thread_name = None
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thread_bt = []
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for line in lines:
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if IS_THREAD.match(line):
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# We have a new thread
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if thread_name:
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threads[thread_name] = "\n".join(thread_bt)
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thread_name = line
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thread_bt = []
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else:
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thread_bt.append(line)
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thread_by_bt = {}
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for thread_name, thread_bt in threads.items():
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norm = EPOLL.sub("epoll_wait(PARAMS)", thread_bt)
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if not thread_by_bt.get(norm):
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thread_by_bt[norm] = [thread_name]
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else:
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thread_by_bt[norm].append(thread_name)
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for bt, thread_names in thread_by_bt.items():
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if len(thread_names) > 1:
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names = "\n".join(thread_names)
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print(f"{names} have the same bt")
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else:
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print(f"{thread_names[0]} has a distinct bt")
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print(bt)
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def parse_segment(data):
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lines = data.split("\n")
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data = lines[1:]
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command = lines[0].strip()
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print(f"(lldb) {command}")
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if command == "bt all":
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process_bt(data)
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else:
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# print('\n'.join(data))
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pass
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def parse_lldb_session(data):
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segments = ("\n" + data).split("\n(lldb)")
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for s in segments:
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if len(s) > 0:
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parse_segment(s)
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def load_lldb_session_file(filename):
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with open(filename) as f:
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data = f.read()
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return parse_lldb_session(data)
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if len(sys.argv) == 1:
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print("USAGE: bt /path/to/lldb-output")
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sys.exit(1)
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else:
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load_lldb_session_file(sys.argv[1])
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