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#!/usr/bin/env python3
# Copyright 2016 The Emscripten Authors. All rights reserved.
# Emscripten is available under two separate licenses, the MIT license and the
# University of Illinois/NCSA Open Source License. Both these licenses can be
# found in the LICENSE file.
import json
import os
import shutil
import sys
import tempfile
import time
from pathlib import Path
profiler_logs_path = os.path.join(tempfile.gettempdir(), 'emscripten_toolchain_profiler_logs')
# Deletes all previously captured log files to make room for a new clean run.
def delete_profiler_logs():
if os.path.exists(profiler_logs_path):
shutil.rmtree(profiler_logs_path)
def list_files_in_directory(d):
files = []
if os.path.exists(d):
for i in os.listdir(d):
f = os.path.join(d, i)
if os.path.isfile(f):
files.append(f)
return files
def create_profiling_graph(outfile):
log_files = [f for f in list_files_in_directory(profiler_logs_path) if 'toolchain_profiler.pid_' in f]
all_results = []
if len(log_files):
print(f'Processing {len(log_files)} profile log files in {profiler_logs_path}...')
for f in log_files:
print(f'Processing: {f}')
json_data = Path(f).read_text()
if len(json_data.strip()) == 0:
continue
lines = json_data.split('\n')
lines = [x for x in lines if x != '[' and x != ']' and x != ',' and len(x.strip())]
lines = [(x + ',') if not x.endswith(',') else x for x in lines]
lines[-1] = lines[-1][:-1]
json_data = '[' + '\n'.join(lines) + ']'
try:
all_results += json.loads(json_data)
except json.JSONDecodeError as e:
print(str(e), file=sys.stderr)
print('Failed to parse JSON file "' + f + '"!', file=sys.stderr)
return 1
if len(all_results) == 0:
print(f'No profiler logs were found in path: ${profiler_logs_path}.\nTry setting the environment variable EMPROFILE=1 and run some emcc commands, then re-run "emprofile.py --graph".', file=sys.stderr)
return 1
all_results.sort(key=lambda x: x['time'])
emprofile_json_data = json.dumps(all_results, indent=2)
html_file = outfile + '.html'
html_contents = Path(os.path.dirname(os.path.realpath(__file__)), 'toolchain_profiler.results_template.html').read_text().replace('{{{ emprofile_json_data }}}', emprofile_json_data)
Path(html_file).write_text(html_contents)
print(f'Wrote "{html_file}"')
return 0
def main(args):
if '--help' in args:
print('''\
Usage:
emprofile.py --clear (or -c)
Deletes all previously recorded profiling log files.
Use this to abort/drop any previously collected
profiling data for a new profiling run.
emprofile.py [--no-clear]
Draws a graph from all recorded profiling log files,
and deletes the recorded profiling files, unless
--no-clear is also passed.
Optional parameters:
--outfile=x.html (or -o=x.html)
Specifies the name of the results file to generate.
''')
return 0
if '--reset' in args or '--clear' in args or '-c' in args:
delete_profiler_logs()
return 0
else:
outfile = 'toolchain_profiler.results_' + time.strftime('%Y%m%d_%H%M')
for i, arg in enumerate(args):
if arg.startswith('--outfile=') or arg.startswith('-o='):
outfile = arg.split('=', 1)[1].strip().replace('.html', '')
elif arg == '-o':
outfile = args[i + 1].strip().replace('.html', '')
if create_profiling_graph(outfile):
return 1
if '--no-clear' not in args:
delete_profiler_logs()
return 0
if __name__ == '__main__':
sys.exit(main(sys.argv[1:]))
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