bionic tests: add setjmp/_setjmp/sigsetjmp tests.

Bug: 17288973
Change-Id: I2808eee58cbddae1b16fbe19a715b72d6dbaaec3
Signed-off-by: Yongqin Liu <yongqin.liu@linaro.org>

2 files changed, 148 insertions, 0 deletions

diff --git a/tests/Android.mk b/tests/Android.mk
index 92d7976..4c4ee13 100644
--- a/tests/Android.mk
+++ b/tests/Android.mk
@@ -76,6 +76,7 @@ libBionicStandardTests_src_files := \
     sched_test.cpp \
     search_test.cpp \
     semaphore_test.cpp \
+    setjmp_test.cpp \
     signal_test.cpp \
     stack_protector_test.cpp \
     stack_unwinding_test.cpp \
diff --git a/tests/setjmp_test.cpp b/tests/setjmp_test.cpp
new file mode 100644
index 0000000..065c783
--- /dev/null
+++ b/tests/setjmp_test.cpp
@@ -0,0 +1,147 @@
+/*
+ * 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);
+  }
+}
+
+static sigset_t SigSetOf(int signal) {
+  sigset_t ss;
+  sigemptyset(&ss);
+  sigaddset(&ss, signal);
+  return ss;
+}
+
+TEST(setjmp, _setjmp_signal_mask) {
+  // _setjmp/_longjmp do not save/restore the signal mask.
+  sigset_t ss1(SigSetOf(SIGUSR1));
+  sigset_t ss2(SigSetOf(SIGUSR2));
+  sigprocmask(SIG_SETMASK, &ss1, NULL);
+  jmp_buf jb;
+  if (_setjmp(jb) == 0) {
+    sigprocmask(SIG_SETMASK, &ss2, NULL);
+    _longjmp(jb, 1);
+    FAIL(); // Unreachable.
+  } else {
+    sigset_t ss;
+    sigprocmask(SIG_SETMASK, NULL, &ss);
+    EXPECT_TRUE(sigismember(&ss, SIGUSR2));
+  }
+}
+
+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.
+  sigset_t ss1(SigSetOf(SIGUSR1));
+  sigset_t ss2(SigSetOf(SIGUSR2));
+  sigprocmask(SIG_SETMASK, &ss1, NULL);
+  jmp_buf jb;
+  if (setjmp(jb) == 0) {
+    sigprocmask(SIG_SETMASK, &ss2, NULL);
+    longjmp(jb, 1);
+    FAIL(); // Unreachable.
+  } else {
+    sigset_t ss;
+    sigprocmask(SIG_SETMASK, NULL, &ss);
+#if defined(__BIONIC__)
+    // bionic behaves like BSD and does save/restore the signal mask.
+    EXPECT_TRUE(sigismember(&ss, SIGUSR1));
+#else
+    // glibc behaves like System V and doesn't save/restore the signal mask.
+    EXPECT_TRUE(sigismember(&ss, SIGUSR2));
+#endif
+  }
+}
+
+TEST(setjmp, sigsetjmp_0_signal_mask) {
+  // sigsetjmp(0)/siglongjmp do not save/restore the signal mask.
+  sigset_t ss1(SigSetOf(SIGUSR1));
+  sigset_t ss2(SigSetOf(SIGUSR2));
+  sigprocmask(SIG_SETMASK, &ss1, NULL);
+  sigjmp_buf sjb;
+  if (sigsetjmp(sjb, 0) == 0) {
+    sigprocmask(SIG_SETMASK, &ss2, NULL);
+    siglongjmp(sjb, 1);
+    FAIL(); // Unreachable.
+  } else {
+    sigset_t ss;
+    sigprocmask(SIG_SETMASK, NULL, &ss);
+    EXPECT_TRUE(sigismember(&ss, SIGUSR2));
+  }
+}
+
+TEST(setjmp, sigsetjmp_1_signal_mask) {
+  // sigsetjmp(1)/siglongjmp does save/restore the signal mask.
+  sigset_t ss1(SigSetOf(SIGUSR1));
+  sigset_t ss2(SigSetOf(SIGUSR2));
+  sigprocmask(SIG_SETMASK, &ss1, NULL);
+  sigjmp_buf sjb;
+  if (sigsetjmp(sjb, 1) == 0) {
+    sigprocmask(SIG_SETMASK, &ss2, NULL);
+    siglongjmp(sjb, 1);
+    FAIL(); // Unreachable.
+  } else {
+    sigset_t ss;
+    sigprocmask(SIG_SETMASK, NULL, &ss);
+    EXPECT_TRUE(sigismember(&ss, SIGUSR1));
+  }
+}