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//===-- Unittests for sigsetjmp and siglongjmp ----------------------------===//
//
// 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/setjmp/siglongjmp.h"
#include "src/setjmp/sigsetjmp.h"
#include "src/signal/sigprocmask.h"
#include "src/string/memcmp.h"
#include "src/string/memset.h"
#include "test/UnitTest/Test.h"
constexpr int MAX_LOOP = 123;
int longjmp_called = 0;
void jump_back(jmp_buf buf, int n) {
longjmp_called++;
LIBC_NAMESPACE::siglongjmp(buf, n); // Will return |n| out of setjmp
}
TEST(LlvmLibcSetJmpTest, SigSetAndJumpBackSaveSigs) {
jmp_buf buf;
longjmp_called = 0;
volatile int n = 0;
sigset_t old;
sigset_t mask_all;
sigset_t recovered;
LIBC_NAMESPACE::memset(&mask_all, 0xFF, sizeof(mask_all));
LIBC_NAMESPACE::memset(&old, 0, sizeof(old));
LIBC_NAMESPACE::memset(&recovered, 0, sizeof(recovered));
LIBC_NAMESPACE::sigprocmask(0, nullptr, &old);
if (LIBC_NAMESPACE::sigsetjmp(buf, 1) <= MAX_LOOP) {
LIBC_NAMESPACE::sigprocmask(0, nullptr, &recovered);
ASSERT_EQ(0, LIBC_NAMESPACE::memcmp(&old, &recovered, sizeof(old)));
n = n + 1;
LIBC_NAMESPACE::sigprocmask(SIG_BLOCK, &mask_all, nullptr);
jump_back(buf, n);
}
ASSERT_EQ(longjmp_called, n);
ASSERT_EQ(n, MAX_LOOP + 1);
}
TEST(LlvmLibcSetJmpTest, SigSetAndJumpBackValOneSaveSigs) {
jmp_buf buf;
longjmp_called = 0;
sigset_t old;
sigset_t mask_all;
sigset_t recovered;
LIBC_NAMESPACE::memset(&mask_all, 0xFF, sizeof(mask_all));
LIBC_NAMESPACE::memset(&old, 0, sizeof(old));
LIBC_NAMESPACE::memset(&recovered, 0, sizeof(recovered));
LIBC_NAMESPACE::sigprocmask(0, nullptr, &old);
int val = LIBC_NAMESPACE::sigsetjmp(buf, 1);
if (val == 0) {
LIBC_NAMESPACE::sigprocmask(SIG_BLOCK, &mask_all, nullptr);
jump_back(buf, val);
}
LIBC_NAMESPACE::sigprocmask(0, nullptr, &recovered);
ASSERT_EQ(0, LIBC_NAMESPACE::memcmp(&old, &recovered, sizeof(old)));
ASSERT_EQ(longjmp_called, 1);
ASSERT_EQ(val, 1);
}
TEST(LlvmLibcSetJmpTest, SigSetAndJumpBackNoSaveSigs) {
jmp_buf buf;
longjmp_called = 0;
volatile int n = 0;
if (LIBC_NAMESPACE::sigsetjmp(buf, 0) <= MAX_LOOP) {
n = n + 1;
jump_back(buf, n);
}
ASSERT_EQ(longjmp_called, n);
ASSERT_EQ(n, MAX_LOOP + 1);
}
TEST(LlvmLibcSetJmpTest, SigSetAndJumpBackValOneNoSaveSigs) {
jmp_buf buf;
longjmp_called = 0;
int val = LIBC_NAMESPACE::sigsetjmp(buf, 0);
if (val == 0) {
jump_back(buf, val);
}
ASSERT_EQ(longjmp_called, 1);
ASSERT_EQ(val, 1);
}
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