src/v8/tools/run-valgrind.py

#!/usr/bin/env python
#
# Copyright 2009 the V8 project authors. All rights reserved.
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# Simple wrapper for running valgrind and checking the output on
# stderr for memory leaks.
# Uses valgrind from third_party/valgrind. Assumes the executable is passed
# with a path relative to the v8 root.


from os import path
import platform
import re
import subprocess
import sys

V8_ROOT = path.dirname(path.dirname(path.abspath(__file__)))
MACHINE = 'linux_x64' if platform.machine() == 'x86_64' else 'linux_x86'
VALGRIND_ROOT = path.join(V8_ROOT, 'third_party', 'valgrind', MACHINE)
VALGRIND_BIN = path.join(VALGRIND_ROOT, 'bin', 'valgrind')
VALGRIND_LIB = path.join(VALGRIND_ROOT, 'lib', 'valgrind')

VALGRIND_ARGUMENTS = [
  VALGRIND_BIN,
  '--error-exitcode=1',
  '--leak-check=full',
  '--smc-check=all',
]

if len(sys.argv) < 2:
  print 'Please provide an executable to analyze.'
  sys.exit(1)

executable = path.join(V8_ROOT, sys.argv[1])
if not path.exists(executable):
  print 'Cannot find the file specified: %s' % executable
  sys.exit(1)

# Compute the command line.
command = VALGRIND_ARGUMENTS + [executable] + sys.argv[2:]

# Run valgrind.
process = subprocess.Popen(
    command,
    stderr=subprocess.PIPE,
    env={'VALGRIND_LIB': VALGRIND_LIB}
)
code = process.wait();
errors = process.stderr.readlines();

# If valgrind produced an error, we report that to the user.
if code != 0:
  sys.stderr.writelines(errors)
  sys.exit(code)

# Look through the leak details and make sure that we don't
# have any definitely, indirectly, and possibly lost bytes.
LEAK_RE = r"(?:definitely|indirectly|possibly) lost: "
LEAK_LINE_MATCHER = re.compile(LEAK_RE)
LEAK_OKAY_MATCHER = re.compile(r"lost: 0 bytes in 0 blocks")
leaks = []
for line in errors:
  if LEAK_LINE_MATCHER.search(line):
    leaks.append(line)
    if not LEAK_OKAY_MATCHER.search(line):
      sys.stderr.writelines(errors)
      sys.exit(1)

# Make sure we found between 2 and 3 leak lines.
if len(leaks) < 2 or len(leaks) > 3:
  sys.stderr.writelines(errors)
  sys.stderr.write('\n\n#### Malformed valgrind output.\n#### Exiting.\n')
  sys.exit(1)

# No leaks found.
sys.stderr.writelines(errors)
sys.exit(0)