exec_wrapper.py 4.6 KB

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  1. #!/usr/bin/env python3
  2. # Import as few modules and define as few names as possible at global level before exec'ing the
  3. # file, as all names will be seen by the exec'ed code. To prevent name collisions, all names
  4. # defined here should begin with 'exec_wrapper_'
  5. import sys,os,time
  6. def exec_wrapper_get_colors():
  7. from collections import namedtuple
  8. return namedtuple('colors',['red','green','yellow','blue','purple'])(*[
  9. (lambda s:s) if os.getenv('MMGEN_DISABLE_COLOR') else
  10. (lambda s,n=n:f'\033[{n};1m{s}\033[0m' )
  11. for n in (31,32,33,34,35) ])
  12. def exec_wrapper_init(): # don't change: name is used to test if script is running under exec_wrapper
  13. if os.path.dirname(sys.argv[1]) == 'test': # scripts in ./test do overlay setup themselves
  14. sys.path[0] = 'test'
  15. else:
  16. from test.overlay import overlay_setup
  17. sys.path[0] = overlay_setup(repo_root=os.getcwd()) # assume we're in the repo root
  18. os.environ['MMGEN_EXEC_WRAPPER'] = '1'
  19. os.environ['PYTHONPATH'] = '.'
  20. if 'TMUX' in os.environ:
  21. del os.environ['TMUX']
  22. if os.getenv('EXEC_WRAPPER_TRACEBACK'):
  23. try:
  24. os.unlink('test.py.err')
  25. except:
  26. pass
  27. def exec_wrapper_write_traceback(e,exit_val):
  28. exc_line = (
  29. repr(e) if type(e).__name__ in ('MMGenError','MMGenSystemExit') else
  30. '{}: {}'.format( type(e).__name__, e ))
  31. c = exec_wrapper_get_colors()
  32. if os.getenv('EXEC_WRAPPER_TRACEBACK'):
  33. import traceback
  34. cwd = os.path.abspath('.')
  35. def fixup_fn(fn_in):
  36. from mmgen.util2 import removeprefix,removesuffix
  37. fn = removeprefix(removeprefix(fn_in,cwd+'/'),'test/overlay/tree/')
  38. return removesuffix(fn,'_orig.py') + '.py' if fn.endswith('_orig.py') else fn
  39. # Python 3.9:
  40. # fn = fn_in.removeprefix(cwd+'/').removeprefix('test/overlay/tree/')
  41. # return fn.removesuffix('_orig.py') + '.py' if fn.endswith('_orig.py') else fn
  42. def gen_output():
  43. yield 'Traceback (most recent call last):'
  44. for e in traceback.extract_tb(sys.exc_info()[2]):
  45. yield ' File "{f}", line {l}, in {n}\n {L}'.format(
  46. f = exec_wrapper_execed_file if e.filename == '<string>' else fixup_fn(e.filename),
  47. l = '(scrubbed)' if os.getenv('MMGEN_TEST_SUITE_DETERMINISTIC') else e.lineno,
  48. n = e.name,
  49. L = e.line or 'N/A' )
  50. tb_lines = list( gen_output() )
  51. if 'SystemExit' in exc_line:
  52. tb_lines.pop()
  53. sys.stdout.write('{}\n{}\n'.format( c.yellow( '\n'.join(tb_lines) ), c.red(exc_line) ))
  54. with open('test.py.err','w') as fp:
  55. fp.write('\n'.join(tb_lines + [exc_line]))
  56. else:
  57. sys.stdout.write( c.purple((f'NONZERO_EXIT[{exit_val}]: ' if exit_val else '') + exc_line) + '\n' )
  58. def exec_wrapper_end_msg():
  59. if os.getenv('EXEC_WRAPPER_SPAWN') and not os.getenv('MMGEN_TEST_SUITE_DETERMINISTIC'):
  60. c = exec_wrapper_get_colors()
  61. # write to stdout to ensure script output gets to terminal first
  62. sys.stdout.write(c.blue('Runtime: {:0.5f} secs\n'.format(time.time() - exec_wrapper_tstart)))
  63. def exec_wrapper_tracemalloc_setup():
  64. if os.getenv('MMGEN_TRACEMALLOC'):
  65. os.environ['PYTHONTRACEMALLOC'] = '1'
  66. import tracemalloc
  67. tracemalloc.start()
  68. sys.stderr.write("INFO → Appending memory allocation stats to 'tracemalloc.log'\n")
  69. def exec_wrapper_tracemalloc_log():
  70. if os.getenv('MMGEN_TRACEMALLOC'):
  71. import tracemalloc,re
  72. snapshot = tracemalloc.take_snapshot()
  73. stats = snapshot.statistics('lineno')
  74. depth = 100
  75. col1w = 100
  76. with open('tracemalloc.log','a') as fp:
  77. fp.write('##### TOP {} {} #####\n'.format(depth,' '.join(sys.argv)))
  78. for stat in stats[:depth]:
  79. frame = stat.traceback[0]
  80. fn = re.sub(r'.*\/site-packages\/|.*\/mmgen\/test\/overlay\/tree\/','',frame.filename)
  81. fn = re.sub(r'.*\/mmgen\/test\/','test/',fn)
  82. fp.write('{f:{w}} {s:>8.2f} KiB\n'.format(
  83. f = f'{fn}:{frame.lineno}:',
  84. s = stat.size/1024,
  85. w = col1w ))
  86. fp.write('{f:{w}} {s:8.2f} KiB\n\n'.format(
  87. f = 'TOTAL {}:'.format(' '.join(sys.argv))[:col1w],
  88. s = sum(stat.size for stat in stats) / 1024,
  89. w = col1w ))
  90. exec_wrapper_init() # sets sys.path[0], runs overlay_setup()
  91. exec_wrapper_tstart = time.time()
  92. exec_wrapper_tracemalloc_setup()
  93. from mmgen.devinit import init_dev # import mmgen mods only after overlay setup!
  94. init_dev()
  95. try:
  96. sys.argv.pop(0)
  97. exec_wrapper_execed_file = sys.argv[0]
  98. with open(exec_wrapper_execed_file) as fp:
  99. exec(fp.read())
  100. except SystemExit as e:
  101. if e.code != 0:
  102. exec_wrapper_write_traceback(e,e.code)
  103. else:
  104. exec_wrapper_tracemalloc_log()
  105. exec_wrapper_end_msg()
  106. sys.exit(e.code)
  107. except Exception as e:
  108. exit_val = e.mmcode if hasattr(e,'mmcode') else e.code if hasattr(e,'code') else 1
  109. exec_wrapper_write_traceback(e,exit_val)
  110. sys.exit(exit_val)
  111. exec_wrapper_tracemalloc_log()
  112. exec_wrapper_end_msg()