Class LibraryRepo

deps/v8/tools/profiling/ll_prof.py:696–822

class LibraryRepo(object):
  def __init__(self):
    self.infos = []
    self.names = set()
    self.ticks = {}


  def HasDynamicSymbols(self, filename):
    if filename.endswith(".ko"): return False
    process = subprocess.Popen(
      "%s -h %s" % (OBJDUMP_BIN, filename),
      shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
    pipe = process.stdout
    try:
      for line in pipe:
        match = OBJDUMP_SECTION_HEADER_RE.match(line.decode())
        if match and match.group(1) == 'dynsym':
          return True
    finally:
      pipe.close()
    assert process.wait() == 0, "Failed to objdump -h %s" % filename
    return False


  def Load(self, mmap_info, code_map, options):
    # Skip kernel mmaps when requested using the fact that their tid
    # is 0.
    if mmap_info.tid == 0 and not options.kernel:
      return True
    if OBJDUMP_SKIP_RE.match(mmap_info.filename):
      return True
    if PERF_KERNEL_ALLSYMS_RE.match(mmap_info.filename):
      return self._LoadKernelSymbols(code_map)
    self.infos.append(mmap_info)
    mmap_info.ticks = 0
    mmap_info.unique_name = self._UniqueMmapName(mmap_info)
    if not os.path.exists(mmap_info.filename):
      return True
    # Request section headers (-h), symbols (-t), and dynamic symbols
    # (-T) from objdump.
    # Unfortunately, section headers span two lines, so we have to
    # keep the just seen section name (from the first line in each
    # section header) in the after_section variable.
    if self.HasDynamicSymbols(mmap_info.filename):
      dynamic_symbols = "-T"
    else:
      dynamic_symbols = ""
    process = subprocess.Popen(
      "%s -h -t %s -C %s" % (OBJDUMP_BIN, dynamic_symbols, mmap_info.filename),
      shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
    pipe = process.stdout
    after_section = None
    code_sections = set()
    reloc_sections = set()
    dynamic = False
    try:
      for line in pipe:
        line = line.decode()