gyptest-solibs-avoid-relinking.py

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#!/usr/bin/env python

# Copyright (c) 2012 Google Inc. All rights reserved.

# Use of this source code is governed by a BSD-style license that can be

# found in the LICENSE file.

"""

Verify that relinking a solib doesn't relink a dependent executable if the

solib's public API hasn't changed.

"""

from __future__ import print_function

import os

import sys

import TestCommon

import TestGyp

# NOTE(fischman): This test will not work with other generators because the

# API-hash-based-mtime-preservation optimization is only implemented in

# ninja.py.  It could be extended to the make.py generator as well pretty

# easily, probably.

# (also, it tests ninja-specific out paths, which would have to be generalized

# if this was extended to other generators).

test = TestGyp.TestGyp(formats=['ninja'])

if not os.environ.get('ProgramFiles(x86)'):

  # TODO(scottmg)

  print('Skipping test on x86, http://crbug.com/365833')

  test.pass_test()

test.run_gyp('solibs_avoid_relinking.gyp')

# Build the executable, grab its timestamp, touch the solib's source, rebuild

# executable, ensure timestamp hasn't changed.

test.build('solibs_avoid_relinking.gyp', 'b')

test.built_file_must_exist('b' + TestCommon.exe_suffix)

pre_stat = os.stat(test.built_file_path('b' + TestCommon.exe_suffix))

os.utime(os.path.join(test.workdir, 'solib.cc'),

         (pre_stat.st_atime, pre_stat.st_mtime + 100))

test.sleep()

test.build('solibs_avoid_relinking.gyp', 'b')

post_stat = os.stat(test.built_file_path('b' + TestCommon.exe_suffix))

if pre_stat.st_mtime != post_stat.st_mtime:

  test.fail_test()

else:

  test.pass_test()