Method TryExtractStackTrace

deps/v8/tools/grokdump.py:2290–2324

(self, slot, start, end, print_message)

    return self.TryExtractOldStyleStackTrace(0, start, end, print_message)

  def TryExtractStackTrace(self, slot, start, end, print_message):
    ptr_size = self.reader.MachinePointerSize()
    assert self.reader.ReadUIntPtr(slot) & 0xFFFFFFFF == STACK_TRACE_MARKER
    # Look for the mid marker after the start slot.
    mid_slot = self.reader.FindPtr(STACK_TRACE_MID_MARKER, start + ptr_size,
                                   start + ptr_size * 100)
    if not mid_slot:
      return self.TryExtractOldStackTrace(slot, start, end, print_message)
    end_search = mid_slot + (32 * 1024) + (4 * ptr_size)
    end_slot = self.reader.FindPtr(STACK_TRACE_END_MARKER, end_search,
                                   end_search + ptr_size * 512)
    if not end_slot:
      return start

    print("Stack Message (start=%s):" % self.heap.FormatIntPtr(slot))
    value = self.reader.ReadUIntPtr(slot)
    print(" %s: %s" % ("isolate".rjust(14), self.heap.FormatIntPtr(value)))
    slot += ptr_size
    i = 0
    while slot < mid_slot:
      value = self.reader.ReadUIntPtr(slot)
      print(" %s: %s" % ("ptr%d" % i, self.heap.FormatIntPtr(value)))
      slot += ptr_size
      i += 1
    slot = mid_slot + ptr_size
    for i in range(4):
      value = self.reader.ReadUIntPtr(slot)
      print(" %s: %s" % ("codeObject%d" % i, self.heap.FormatIntPtr(value)))
      slot += ptr_size
    print("  message start: %s" % self.heap.FormatIntPtr(slot))
    stack_start = end_slot + ptr_size
    print("  stack_start:   %s" % self.heap.FormatIntPtr(stack_start))
    (message_start, message) = self.FindFirstAsciiString(slot)
    self.FormatStackTrace(message, print_message)
    return stack_start

  def TryExtractOldStackTrace(self, slot, start, end, print_message):
    ptr_size = self.reader.MachinePointerSize()