tools/gdb/gdbinit

# This is gdbinit for source level debugging with -fdebug-compilation-dir
# compile option.

python

import os

def get_current_debug_file_directories():
  dir = gdb.execute("show debug-file-directory", to_string=True)
  dir = dir[len('The directory where separate debug symbols are searched for is "'):-len('".')-1]
  return set(dir.split(":"))


def add_debug_file_directory(dir):
  # gdb has no function to add debug-file-directory, simulates that by using
  # `show debug-file-directory` and `set debug-file-directory <directories>`.
  current_dirs = get_current_debug_file_directories()
  current_dirs.add(dir)
  gdb.execute("set debug-file-directory %s" % ":".join(current_dirs),
              to_string=True)


def newobj_handler(event):
  compile_dir = os.path.dirname(event.new_objfile.filename)
  if not compile_dir:
    return

  # Add source path
  gdb.execute("dir %s" % compile_dir)

  # Need to tell the location of .dwo files.
  # https://sourceware.org/gdb/onlinedocs/gdb/Separate-Debug-Files.html
  # https://crbug.com/603286#c35
  add_debug_file_directory(compile_dir)


# Event hook for newly loaded objfiles.
# https://sourceware.org/gdb/onlinedocs/gdb/Events-In-Python.html
gdb.events.new_objfile.connect(newobj_handler)

end