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59acdba820
Implement a statistical sampling profiler that can profile external Python processes by PID. Uses the _remote_debugging module and converts the results to pstats-compatible format for analysis. Co-authored-by: Pablo Galindo <pablogsal@gmail.com>
69 lines
2.2 KiB
Python
69 lines
2.2 KiB
Python
import io
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import importlib.machinery
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import os
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import sys
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from optparse import OptionParser
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from .profile import runctx
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def main():
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usage = "profile.py [-o output_file_path] [-s sort] [-m module | scriptfile] [arg] ..."
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parser = OptionParser(usage=usage)
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parser.allow_interspersed_args = False
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parser.add_option('-o', '--outfile', dest="outfile",
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help="Save stats to <outfile>", default=None)
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parser.add_option('-m', dest="module", action="store_true",
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help="Profile a library module.", default=False)
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parser.add_option('-s', '--sort', dest="sort",
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help="Sort order when printing to stdout, based on pstats.Stats class",
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default=-1)
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if not sys.argv[1:]:
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parser.print_usage()
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sys.exit(2)
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(options, args) = parser.parse_args()
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sys.argv[:] = args
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# The script that we're profiling may chdir, so capture the absolute path
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# to the output file at startup.
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if options.outfile is not None:
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options.outfile = os.path.abspath(options.outfile)
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if len(args) > 0:
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if options.module:
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import runpy
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code = "run_module(modname, run_name='__main__')"
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globs = {
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'run_module': runpy.run_module,
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'modname': args[0]
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}
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else:
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progname = args[0]
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sys.path.insert(0, os.path.dirname(progname))
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with io.open_code(progname) as fp:
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code = compile(fp.read(), progname, 'exec')
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spec = importlib.machinery.ModuleSpec(name='__main__', loader=None,
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origin=progname)
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globs = {
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'__spec__': spec,
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'__file__': spec.origin,
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'__name__': spec.name,
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'__package__': None,
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'__cached__': None,
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}
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try:
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runctx(code, globs, None, options.outfile, options.sort)
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except BrokenPipeError as exc:
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# Prevent "Exception ignored" during interpreter shutdown.
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sys.stdout = None
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sys.exit(exc.errno)
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else:
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parser.print_usage()
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return parser
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# When invoked as main program, invoke the profiler on a script
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if __name__ == '__main__':
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main()
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