89 lines
2.1 KiB
C++
89 lines
2.1 KiB
C++
//===-- Unittests for atexit ----------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "src/__support/CPP/array.h"
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#include "src/__support/CPP/utility.h"
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#include "src/stdlib/atexit.h"
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#include "src/stdlib/exit.h"
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#include "utils/UnitTest/Test.h"
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static int a;
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TEST(LlvmLibcAtExit, Basic) {
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// In case tests ever run multiple times.
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a = 0;
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auto test = [] {
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int status = __llvm_libc::atexit(+[] {
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if (a != 1)
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__builtin_trap();
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});
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status |= __llvm_libc::atexit(+[] { a++; });
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if (status)
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__builtin_trap();
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__llvm_libc::exit(0);
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};
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EXPECT_EXITS(test, 0);
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}
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TEST(LlvmLibcAtExit, AtExitCallsSysExit) {
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auto test = [] {
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__llvm_libc::atexit(+[] { _Exit(1); });
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__llvm_libc::exit(0);
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};
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EXPECT_EXITS(test, 1);
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}
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static int size;
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static __llvm_libc::cpp::array<int, 256> arr;
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template <int... Ts>
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void register_atexit_handlers(__llvm_libc::cpp::integer_sequence<int, Ts...>) {
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(__llvm_libc::atexit(+[] { arr[size++] = Ts; }), ...);
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}
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template <int count> constexpr auto getTest() {
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return [] {
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__llvm_libc::atexit(+[] {
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if (size != count)
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__builtin_trap();
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for (int i = 0; i < count; i++)
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if (arr[i] != count - 1 - i)
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__builtin_trap();
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});
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register_atexit_handlers(
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__llvm_libc::cpp::make_integer_sequence<int, count>{});
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__llvm_libc::exit(0);
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};
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}
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TEST(LlvmLibcAtExit, ReverseOrder) {
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// In case tests ever run multiple times.
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size = 0;
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auto test = getTest<32>();
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EXPECT_EXITS(test, 0);
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}
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TEST(LlvmLibcAtExit, Many) {
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// In case tests ever run multiple times.
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size = 0;
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auto test = getTest<256>();
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EXPECT_EXITS(test, 0);
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}
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TEST(LlvmLibcAtExit, HandlerCallsAtExit) {
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auto test = [] {
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__llvm_libc::atexit(
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+[] { __llvm_libc::atexit(+[] { __llvm_libc::exit(1); }); });
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__llvm_libc::exit(0);
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};
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EXPECT_EXITS(test, 1);
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}
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