Update monet.

tools/valgrind/asan/asan_symbolize.py

Index: tools/valgrind/asan/asan_symbolize.py
diff --git a/tools/valgrind/asan/asan_symbolize.py b/tools/valgrind/asan/asan_symbolize.py
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+++ b/tools/valgrind/asan/asan_symbolize.py
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+#!/usr/bin/env python
+
+# Copyright (c) 2012 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+from third_party import asan_symbolize
+
+import argparse
+import base64
+import json
+import os
+import platform
+import re
+import subprocess
+import sys
+
+class LineBuffered(object):
+  """Disable buffering on a file object."""
+  def __init__(self, stream):
+    self.stream = stream
+
+  def write(self, data):
+    self.stream.write(data)
+    if '\n' in data:
+      self.stream.flush()
+
+  def __getattr__(self, attr):
+    return getattr(self.stream, attr)
+
+
+def disable_buffering():
+  """Makes this process and child processes stdout unbuffered."""
+  if not os.environ.get('PYTHONUNBUFFERED'):
+    # Since sys.stdout is a C++ object, it's impossible to do
+    # sys.stdout.write = lambda...
+    sys.stdout = LineBuffered(sys.stdout)
+    os.environ['PYTHONUNBUFFERED'] = 'x'
+
+
+def set_symbolizer_path():
+  """Set the path to the llvm-symbolize binary in the Chromium source tree."""
+  if not os.environ.get('LLVM_SYMBOLIZER_PATH'):
+    script_dir = os.path.dirname(os.path.abspath(__file__))
+    # Assume this script resides three levels below src/ (i.e.
+    # src/tools/valgrind/asan/).
+    src_root = os.path.join(script_dir, "..", "..", "..")
+    symbolizer_path = os.path.join(src_root, 'third_party',
+        'llvm-build', 'Release+Asserts', 'bin', 'llvm-symbolizer')
+    assert(os.path.isfile(symbolizer_path))
+    os.environ['LLVM_SYMBOLIZER_PATH'] = os.path.abspath(symbolizer_path)
+
+
+def is_hash_name(name):
+  match = re.match('[0-9a-f]+$', name)
+  return bool(match)
+
+
+def split_path(path):
+  ret = []
+  while True:
+    head, tail = os.path.split(path)
+    if head == path:
+      return [head] + ret
+    ret, path = [tail] + ret, head
+
+
+def chrome_product_dir_path(exe_path):
+  if exe_path is None:
+    return None
+  path_parts = split_path(exe_path)
+  # Make sure the product dir path isn't empty if |exe_path| consists of
+  # a single component.
+  if len(path_parts) == 1:
+    path_parts = ['.'] + path_parts
+  for index, part in enumerate(path_parts):
+    if part.endswith('.app'):
+      return os.path.join(*path_parts[:index])
+  # If the executable isn't an .app bundle, it's a commandline binary that
+  # resides right in the product dir.
+  return os.path.join(*path_parts[:-1])
+
+
+inode_path_cache = {}
+
+
+def find_inode_at_path(inode, path):
+  if inode in inode_path_cache:
+    return inode_path_cache[inode]
+  cmd = ['find', path, '-inum', str(inode)]
+  find_line = subprocess.check_output(cmd).rstrip()
+  lines = find_line.split('\n')
+  ret = None
+  if lines:
+    # `find` may give us several paths (e.g. 'Chromium Framework' in the
+    # product dir and 'Chromium Framework' inside 'Chromium.app',
+    # chrome_dsym_hints() will produce correct .dSYM path for any of them.
+    ret = lines[0]
+  inode_path_cache[inode] = ret
+  return ret
+
+
+# Create a binary name filter that works around https://crbug.com/444835.
+# When running tests on OSX swarming servers, ASan sometimes prints paths to
+# files in cache (ending with SHA1 filenames) instead of paths to hardlinks to
+# those files in the product dir.
+# For a given |binary_path| chrome_osx_binary_name_filter() returns one of the
+# hardlinks to the same inode in |product_dir_path|.
+def make_chrome_osx_binary_name_filter(product_dir_path=''):
+  def chrome_osx_binary_name_filter(binary_path):
+    basename = os.path.basename(binary_path)
+    if is_hash_name(basename) and product_dir_path:
+      inode = os.stat(binary_path).st_ino
+      new_binary_path = find_inode_at_path(inode, product_dir_path)
+      if new_binary_path:
+        return new_binary_path
+    return binary_path
+  return chrome_osx_binary_name_filter
+
+
+# Construct a path to the .dSYM bundle for the given binary.
+# There are three possible cases for binary location in Chromium:
+# 1. The binary is a standalone executable or dynamic library in the product
+#    dir, the debug info is in "binary.dSYM" in the product dir.
+# 2. The binary is a standalone framework or .app bundle, the debug info is in
+#    "Framework.framework.dSYM" or "App.app.dSYM" in the product dir.
+# 3. The binary is a framework or an .app bundle within another .app bundle
+#    (e.g. Outer.app/Contents/Versions/1.2.3.4/Inner.app), and the debug info
+#    is in Inner.app.dSYM in the product dir.
+# The first case is handled by llvm-symbolizer, so we only need to construct
+# .dSYM paths for .app bundles and frameworks.
+# We're assuming that there're no more than two nested bundles in the binary
+# path. Only one of these bundles may be a framework and frameworks cannot
+# contain other bundles.
+def chrome_dsym_hints(binary):
+  path_parts = split_path(binary)
+  app_positions = []
+  framework_positions = []
+  for index, part in enumerate(path_parts):
+    if part.endswith('.app'):
+      app_positions.append(index)
+    elif part.endswith('.framework'):
+      framework_positions.append(index)
+  bundle_positions = app_positions + framework_positions
+  bundle_positions.sort()
+  assert len(bundle_positions) <= 2, \
+      "The path contains more than two nested bundles: %s" % binary
+  if len(bundle_positions) == 0:
+    # Case 1: this is a standalone executable or dylib.
+    return []
+  assert (not (len(app_positions) == 1 and
+               len(framework_positions) == 1 and
+               app_positions[0] > framework_positions[0])), \
+      "The path contains an app bundle inside a framework: %s" % binary
+  # Cases 2 and 3. The outermost bundle (which is the only bundle in the case 2)
+  # is located in the product dir.
+  outermost_bundle = bundle_positions[0]
+  product_dir = path_parts[:outermost_bundle]
+  # In case 2 this is the same as |outermost_bundle|.
+  innermost_bundle = bundle_positions[-1]
+  dsym_path = product_dir + [path_parts[innermost_bundle]]
+  result = '%s.dSYM' % os.path.join(*dsym_path)
+  return [result]
+
+
+# We want our output to match base::EscapeJSONString(), which produces
+# doubly-escaped strings. The first escaping pass is handled by this class. The
+# second pass happens when JSON data is dumped to file.
+class StringEncoder(json.JSONEncoder):
+  def __init__(self):
+    json.JSONEncoder.__init__(self)
+
+  def encode(self, s):
+    assert(isinstance(s, basestring))
+    encoded = json.JSONEncoder.encode(self, s)
+    assert(len(encoded) >= 2)
+    assert(encoded[0] == '"')
+    assert(encoded[-1] == '"')
+    encoded = encoded[1:-1]
+    # Special case from base::EscapeJSONString().
+    encoded = encoded.replace('<', '\u003C')
+    return encoded
+
+
+class JSONTestRunSymbolizer(object):
+  def __init__(self, symbolization_loop):
+    self.string_encoder = StringEncoder()
+    self.symbolization_loop = symbolization_loop
+
+  def symbolize_snippet(self, snippet):
+    symbolized_lines = []
+    for line in snippet.split('\n'):
+      symbolized_lines += self.symbolization_loop.process_line(line)
+    return '\n'.join(symbolized_lines)
+
+  def symbolize(self, test_run):
+    original_snippet = base64.b64decode(test_run['output_snippet_base64'])
+    symbolized_snippet = self.symbolize_snippet(original_snippet)
+    if symbolized_snippet == original_snippet:
+      # No sanitizer reports in snippet.
+      return
+
+    test_run['original_output_snippet'] = test_run['output_snippet']
+    test_run['original_output_snippet_base64'] = \
+        test_run['output_snippet_base64']
+
+    escaped_snippet = StringEncoder().encode(symbolized_snippet)
+    test_run['output_snippet'] = escaped_snippet
+    test_run['output_snippet_base64'] = \
+        base64.b64encode(symbolized_snippet)
+    test_run['snippet_processed_by'] = 'asan_symbolize.py'
+    # Originally, "lossless" refers to "no Unicode data lost while encoding the
+    # string". However, since we're applying another kind of transformation
+    # (symbolization), it doesn't seem right to consider the snippet lossless.
+    test_run['losless_snippet'] = False
+
+
+def symbolize_snippets_in_json(filename, symbolization_loop):
+  with open(filename, 'r') as f:
+    json_data = json.load(f)
+
+  test_run_symbolizer = JSONTestRunSymbolizer(symbolization_loop)
+  for iteration_data in json_data['per_iteration_data']:
+    for test_name, test_runs in iteration_data.iteritems():
+      for test_run in test_runs:
+        test_run_symbolizer.symbolize(test_run)
+
+  with open(filename, 'w') as f:
+    json.dump(json_data, f, indent=3, sort_keys=True)
+
+
+def main():
+  parser = argparse.ArgumentParser(description='Symbolize sanitizer reports.')
+  parser.add_argument('--test-summary-json-file',
+      help='Path to a JSON file produced by the test launcher. The script will '
+           'ignore stdandard input and instead symbolize the output stnippets '
+           'inside the JSON file. The result will be written back to the JSON '
+           'file.')
+  parser.add_argument('strip_path_prefix', nargs='*',
+      help='When printing source file names, the longest prefix ending in one '
+           'of these substrings will be stripped. E.g.: "Release/../../".')
+  parser.add_argument('--executable-path',
+      help='Path to program executable. Used on OSX swarming bots to locate '
+           'dSYM bundles for associated frameworks and bundles.')
+  args = parser.parse_args()
+
+  disable_buffering()
+  set_symbolizer_path()
+  asan_symbolize.demangle = True
+  asan_symbolize.fix_filename_patterns = args.strip_path_prefix
+  # Most source paths for Chromium binaries start with
+  # /path/to/src/out/Release/../../
+  asan_symbolize.fix_filename_patterns.append('Release/../../')
+  binary_name_filter = None
+  if platform.uname()[0] == 'Darwin':
+    binary_name_filter = make_chrome_osx_binary_name_filter(
+        chrome_product_dir_path(args.executable_path))
+  loop = asan_symbolize.SymbolizationLoop(
+      binary_name_filter=binary_name_filter,
+      dsym_hint_producer=chrome_dsym_hints)
+
+  if args.test_summary_json_file:
+    symbolize_snippets_in_json(args.test_summary_json_file, loop)
+  else:
+    # Process stdin.
+    asan_symbolize.logfile = sys.stdin
+    loop.process_logfile()
+
+if __name__ == '__main__':
+  main()