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