exec_wrapper.py 4.9 KB

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