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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <gtest/gtest.h>
#include <setjmp.h>
#include <stdlib.h>
TEST(setjmp, setjmp_smoke) {
int value;
jmp_buf jb;
if ((value = setjmp(jb)) == 0) {
longjmp(jb, 123);
FAIL(); // Unreachable.
} else {
ASSERT_EQ(123, value);
}
}
TEST(setjmp, _setjmp_smoke) {
int value;
jmp_buf jb;
if ((value = _setjmp(jb)) == 0) {
_longjmp(jb, 456);
FAIL(); // Unreachable.
} else {
ASSERT_EQ(456, value);
}
}
TEST(setjmp, sigsetjmp_0_smoke) {
int value;
sigjmp_buf jb;
if ((value = sigsetjmp(jb, 0)) == 0) {
siglongjmp(jb, 789);
FAIL(); // Unreachable.
} else {
ASSERT_EQ(789, value);
}
}
TEST(setjmp, sigsetjmp_1_smoke) {
int value;
sigjmp_buf jb;
if ((value = sigsetjmp(jb, 0)) == 0) {
siglongjmp(jb, 0xabc);
FAIL(); // Unreachable.
} else {
ASSERT_EQ(0xabc, value);
}
}
// Two distinct signal sets, pipu
struct SigSets {
SigSets() : one(MakeSigSet(0)), two(MakeSigSet(1)) {
}
static sigset_t MakeSigSet(int offset) {
sigset_t ss;
sigemptyset(&ss);
sigaddset(&ss, SIGUSR1 + offset);
#if defined(__LP64__)
// For arm and x86, sigset_t was too small for the RT signals.
// For mips, sigset_t was large enough but jmp_buf wasn't.
sigaddset(&ss, SIGRTMIN + offset);
#endif
return ss;
}
sigset_t one;
sigset_t two;
sigset_t original;
};
void AssertSigmaskEquals(const sigset_t& expected) {
sigset_t actual;
sigprocmask(0 /* ignored */, NULL, &actual);
size_t end = sizeof(sigset_t) * 8;
for (size_t i = 1; i <= end; ++i) {
EXPECT_EQ(sigismember(&expected, i), sigismember(&actual, i)) << i;
}
}
TEST(setjmp, _setjmp_signal_mask) {
// _setjmp/_longjmp do not save/restore the signal mask.
SigSets ss;
sigprocmask(SIG_SETMASK, &ss.one, &ss.original);
jmp_buf jb;
if (_setjmp(jb) == 0) {
sigprocmask(SIG_SETMASK, &ss.two, NULL);
_longjmp(jb, 1);
FAIL(); // Unreachable.
} else {
AssertSigmaskEquals(ss.two);
}
sigprocmask(SIG_SETMASK, &ss.original, NULL);
}
TEST(setjmp, setjmp_signal_mask) {
// setjmp/longjmp do save/restore the signal mask on bionic, but not on glibc.
// This is a BSD versus System V historical accident. POSIX leaves the
// behavior unspecified, so any code that cares needs to use sigsetjmp.
SigSets ss;
sigprocmask(SIG_SETMASK, &ss.one, &ss.original);
jmp_buf jb;
if (setjmp(jb) == 0) {
sigprocmask(SIG_SETMASK, &ss.two, NULL);
longjmp(jb, 1);
FAIL(); // Unreachable.
} else {
#if defined(__BIONIC__)
// bionic behaves like BSD and does save/restore the signal mask.
AssertSigmaskEquals(ss.one);
#else
// glibc behaves like System V and doesn't save/restore the signal mask.
AssertSigmaskEquals(ss.two);
#endif
}
sigprocmask(SIG_SETMASK, &ss.original, NULL);
}
TEST(setjmp, sigsetjmp_0_signal_mask) {
// sigsetjmp(0)/siglongjmp do not save/restore the signal mask.
SigSets ss;
sigprocmask(SIG_SETMASK, &ss.one, &ss.original);
sigjmp_buf sjb;
if (sigsetjmp(sjb, 0) == 0) {
sigprocmask(SIG_SETMASK, &ss.two, NULL);
siglongjmp(sjb, 1);
FAIL(); // Unreachable.
} else {
AssertSigmaskEquals(ss.two);
}
sigprocmask(SIG_SETMASK, &ss.original, NULL);
}
TEST(setjmp, sigsetjmp_1_signal_mask) {
// sigsetjmp(1)/siglongjmp does save/restore the signal mask.
SigSets ss;
sigprocmask(SIG_SETMASK, &ss.one, &ss.original);
sigjmp_buf sjb;
if (sigsetjmp(sjb, 1) == 0) {
sigprocmask(SIG_SETMASK, &ss.two, NULL);
siglongjmp(sjb, 1);
FAIL(); // Unreachable.
} else {
AssertSigmaskEquals(ss.one);
}
sigprocmask(SIG_SETMASK, &ss.original, NULL);
}
#if defined(__aarch64__)
#define SET_FREG(n, v) asm volatile("fmov d"#n ", "#v : : : "d"#n)
#define CLEAR_FREG(n) asm volatile("fmov d"#n ", xzr" : : : "d"#n)
#define SET_FREGS \
SET_FREG(8, 8.0); SET_FREG(9, 9.0); SET_FREG(10, 10.0); SET_FREG(11, 11.0); \
SET_FREG(12, 12.0); SET_FREG(13, 13.0); SET_FREG(14, 14.0); SET_FREG(15, 15.0);
#define CLEAR_FREGS \
CLEAR_FREG(8); CLEAR_FREG(9); CLEAR_FREG(10); CLEAR_FREG(11); \
CLEAR_FREG(12); CLEAR_FREG(13); CLEAR_FREG(14); CLEAR_FREG(15);
#define GET_FREG(n) ({ double _r; asm volatile("fmov %0, d"#n : "=r"(_r) : :); _r; })
#define CHECK_FREGS \
EXPECT_EQ(8.0, GET_FREG(8)); EXPECT_EQ(9.0, GET_FREG(9)); \
EXPECT_EQ(10.0, GET_FREG(10)); EXPECT_EQ(11.0, GET_FREG(11)); \
EXPECT_EQ(12.0, GET_FREG(12)); EXPECT_EQ(13.0, GET_FREG(13)); \
EXPECT_EQ(14.0, GET_FREG(14)); EXPECT_EQ(15.0, GET_FREG(15));
#elif defined(__arm__)
#define SET_FREG(n, v) \
({ const double _v{v}; asm volatile("fcpyd d"#n ", %P0" : : "w"(_v) : "d"#n); })
#define SET_FREGS \
SET_FREG(8, 8); SET_FREG(9, 9); SET_FREG(10, 10); SET_FREG(11, 11); \
SET_FREG(12, 12); SET_FREG(13, 13); SET_FREG(14, 14); SET_FREG(15, 15);
#define CLEAR_FREGS \
SET_FREG(8, 0); SET_FREG(9, 0); SET_FREG(10, 0); SET_FREG(11, 0); \
SET_FREG(12, 0); SET_FREG(13, 0); SET_FREG(14, 0); SET_FREG(15, 0);
#define GET_FREG(n) ({ double _r; asm volatile("fcpyd %P0, d"#n : "=w"(_r) : :); _r;})
#define CHECK_FREGS \
EXPECT_EQ(8.0, GET_FREG(8)); EXPECT_EQ(9.0, GET_FREG(9)); \
EXPECT_EQ(10.0, GET_FREG(10)); EXPECT_EQ(11.0, GET_FREG(11)); \
EXPECT_EQ(12.0, GET_FREG(12)); EXPECT_EQ(13.0, GET_FREG(13)); \
EXPECT_EQ(14.0, GET_FREG(14)); EXPECT_EQ(15.0, GET_FREG(15));
#else
/* The other architectures don't save/restore fp registers. */
#define SET_FREGS
#define CLEAR_FREGS
#define CHECK_FREGS
#endif
TEST(setjmp, setjmp_fp_registers) {
int value;
jmp_buf jb;
SET_FREGS;
if ((value = setjmp(jb)) == 0) {
CLEAR_FREGS;
longjmp(jb, 123);
FAIL(); // Unreachable.
} else {
ASSERT_EQ(123, value);
CHECK_FREGS;
}
}
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