120 строки
3.9 KiB
Plaintext
120 строки
3.9 KiB
Plaintext
# Copyright (c) 2011 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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# This file is meant to be included into an target to create a unittest that
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# invokes a set of no-compile tests. A no-compile test is a test that asserts
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# a particular construct will not compile.
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#
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# Also see:
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# http://dev.chromium.org/developers/testing/no-compile-tests
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#
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# To use this, create a gyp target with the following form:
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#
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# import("//build/nocompile.gni")
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# nocompile_test("my_module_nc_unittests") {
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# sources = [
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# 'nc_testset_1.nc',
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# 'nc_testset_2.nc',
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# ]
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# }
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#
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# The .nc files are C++ files that contain code we wish to assert will not
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# compile. Each individual test case in the file should be put in its own
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# #ifdef section. The expected output should be appended with a C++-style
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# comment that has a python list of regular expressions. This will likely
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# be greater than 80-characters. Giving a solid expected output test is
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# important so that random compile failures do not cause the test to pass.
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#
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# Example .nc file:
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#
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# #if defined(TEST_NEEDS_SEMICOLON) // [r"expected ',' or ';' at end of input"]
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#
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# int a = 1
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#
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# #elif defined(TEST_NEEDS_CAST) // [r"invalid conversion from 'void*' to 'char*'"]
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#
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# void* a = NULL;
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# char* b = a;
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#
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# #endif
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#
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# If we needed disable TEST_NEEDS_SEMICOLON, then change the define to:
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#
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# DISABLE_TEST_NEEDS_SEMICOLON
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# TEST_NEEDS_CAST
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#
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# The lines above are parsed by a regexp so avoid getting creative with the
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# formatting or ifdef logic; it will likely just not work.
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#
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# Implementation notes:
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# The .nc files are actually processed by a python script which executes the
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# compiler and generates a .cc file that is empty on success, or will have a
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# series of #error lines on failure, and a set of trivially passing gunit
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# TEST() functions on success. This allows us to fail at the compile step when
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# something goes wrong, and know during the unittest run that the test was at
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# least processed when things go right.
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import("//build/config/clang/clang.gni")
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import("//build/toolchain/toolchain.gni")
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import("//testing/test.gni")
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declare_args() {
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# TODO(crbug.com/105388): make sure no-compile test is not flaky.
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enable_nocompile_tests =
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(is_linux || is_apple) && is_clang && host_cpu == target_cpu
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}
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if (enable_nocompile_tests) {
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import("//build/config/c++/c++.gni")
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import("//build/config/sysroot.gni")
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template("nocompile_test") {
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nocompile_target = target_name + "_run_nocompile"
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action_foreach(nocompile_target) {
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testonly = true
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script = "//tools/nocompile_driver.py"
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sources = invoker.sources
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deps = invoker.deps
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if (defined(invoker.public_deps)) {
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public_deps = invoker.public_deps
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}
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result_path = "$target_gen_dir/{{source_name_part}}_nc.cc"
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depfile = "${result_path}.d"
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outputs = [ result_path ]
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args = [
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rebase_path("$clang_base_path/bin/clang++", root_build_dir),
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"4", # number of compilers to invoke in parallel.
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"{{source}}",
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rebase_path(result_path, root_build_dir),
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"--",
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"-nostdinc++",
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"-isystem" + rebase_path("$libcxx_prefix/include", root_build_dir),
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"-isystem" + rebase_path("$libcxxabi_prefix/include", root_build_dir),
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"-std=c++14",
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"-Wall",
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"-Werror",
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"-Wfatal-errors",
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"-Wthread-safety",
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"-I" + rebase_path("//", root_build_dir),
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"-I" + rebase_path(root_gen_dir, root_build_dir),
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# TODO(https://crbug.com/989932): Track build/config/compiler/BUILD.gn
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"-Wno-implicit-int-float-conversion",
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]
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if (sysroot != "") {
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args += [
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"--sysroot",
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rebase_path(sysroot, root_build_dir),
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]
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}
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}
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test(target_name) {
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deps = invoker.deps + [ ":$nocompile_target" ]
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sources = get_target_outputs(":$nocompile_target")
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}
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}
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}
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