Fix codeCheck errors

Issue: I6AEEI
Test: Build & Boot Devices
Signed-off-by: Ndhy308 <tony.gan@huawei.com>

libc-test/src/functionalext/common/sigchain_util.h

@@ -13,7 +13,7 @@
  * limitations under the License.
  */
 
-#define SIGCHIAN_TEST_SET_MASK(set, fun, signo, num)  do{ \
+#define SIGCHAIN_TEST_SET_MASK(set, fun, signo, num)  do{ \
     int result = sigemptyset(&set);                       \
     if (result != 0) {                                    \
         EXPECT_FALSE(fun, (result == 0));                 \
@@ -29,3 +29,14 @@
         EXPECT_FALSE(fun, (result == 0));                 \
     }                                                     \
 } while (0)
+
+#define SIGCHIAN_TEST_SIGNAL_NUM_1 1
+#define SIGCHIAN_TEST_SIGNAL_NUM_2 2
+#define SIGCHIAN_TEST_SIGNAL_NUM_10 10
+
+#define SIGCHAIN_SIGNAL_37 37
+#define SIGCHAIN_SIGNAL_43 43
+#define SIGCHAIN_SIGNAL_50 50
+#define SIGCHAIN_SIGNAL_56 56
+#define SIGCHAIN_SIGNAL_64 64
+#define SIGCHAIN_SIGNAL_65 65
\ No newline at end of file

libc-test/src/functionalext/sigchain/sigchain_add_special_handler_a.c

@@ -45,8 +45,8 @@ static void sigchain_add_special_handler_001()
     add_special_signal_handler(SIGSEGV, &sigsegv);
 
     sigset_t set = {0};
-    int signo[1] = {SIGSEGV};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_add_special_handler_001", signo, 1);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_1] = {SIGSEGV};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_add_special_handler_001", signo, SIGCHIAN_TEST_SIGNAL_NUM_1);
 }
 
 int main(void)

libc-test/src/functionalext/sigchain/sigchain_add_special_handler_b.c

@@ -56,8 +56,8 @@ static void sigchain_add_special_handler_002()
     add_special_signal_handler(SIGSEGV, &sigsegv);
 
     sigset_t set = {0};
-    int signo[1] = {SIGSEGV};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_add_special_handler_002", signo, 1);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_1] = {SIGSEGV};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_add_special_handler_002", signo, SIGCHIAN_TEST_SIGNAL_NUM_1);
 }
 
 int main(void)

libc-test/src/functionalext/sigchain/sigchain_add_special_handler_c.c

@@ -58,8 +58,8 @@ static void sigchain_add_special_handler_003()
     add_special_signal_handler(SIGSEGV, &sigsegv);
 
     sigset_t set = {0};
-    int signo[1] = {SIGSEGV};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_add_special_handler_003", signo, 1);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_1] = {SIGSEGV};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_add_special_handler_003", signo, SIGCHIAN_TEST_SIGNAL_NUM_1);
 }
 
 int main(void)

libc-test/src/functionalext/sigchain/sigchain_add_special_handler_d.c

@@ -77,8 +77,8 @@ static void sigchain_add_special_handler_004()
     add_special_signal_handler(SIGSEGV, &sigsegv2);
 
     sigset_t set = {0};
-    int signo[1] = {SIGSEGV};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_add_special_handler_004", signo, 1);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_1] = {SIGSEGV};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_add_special_handler_004", signo, SIGCHIAN_TEST_SIGNAL_NUM_1);
 }
 
 int main(void)

libc-test/src/functionalext/sigchain/sigchain_add_special_handler_e.c

@@ -87,8 +87,8 @@ static void sigchain_add_special_handler_005()
     add_special_signal_handler(SIGSEGV, &sigsegv2);
 
     sigset_t set = {0};
-    int signo[1] = {SIGSEGV};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_add_special_handler_005", signo, 1);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_1] = {SIGSEGV};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_add_special_handler_005", signo, SIGCHIAN_TEST_SIGNAL_NUM_1);
 }
 
 int main(void)

libc-test/src/functionalext/sigchain/sigchain_add_special_handler_f.c

@@ -90,8 +90,8 @@ static void sigchain_add_special_handler_006()
     add_special_signal_handler(SIGSEGV, &sigsegv3);
 
     sigset_t set = {0};
-    int signo[1] = {SIGSEGV};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_add_special_handler_006", signo, 1);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_1] = {SIGSEGV};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_add_special_handler_006", signo, SIGCHIAN_TEST_SIGNAL_NUM_1);
 }
 
 int main(void)

libc-test/src/functionalext/sigchain/sigchain_add_special_handler_g.c

@@ -61,8 +61,8 @@ static void sigchain_add_special_handler_007()
     add_special_signal_handler(SIGHUP, &sigsegv1);
 
     sigset_t set = {0};
-    int signo[2] = {SIGSEGV, SIGHUP};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_add_special_handler_007", signo, 2);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_2] = {SIGSEGV, SIGHUP};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_add_special_handler_007", signo, SIGCHIAN_TEST_SIGNAL_NUM_2);
 }
 
 int main(void)

libc-test/src/functionalext/sigchain/sigchain_add_special_handler_h.c

@@ -75,8 +75,8 @@ static void sigchain_add_special_handler_008()
     add_special_signal_handler(SIGHUP, &sigsegv1);
 
     sigset_t set = {0};
-    int signo[2] = {SIGSEGV, SIGHUP};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_add_special_handler_008", signo, 2);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_2] = {SIGSEGV, SIGHUP};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_add_special_handler_008", signo, SIGCHIAN_TEST_SIGNAL_NUM_2);
 }
 
 int main(void)

libc-test/src/functionalext/sigchain/sigchain_add_special_handler_i.c

@@ -78,8 +78,8 @@ static void sigchain_add_special_handler_009()
     add_special_signal_handler(SIGHUP, &sigsegv2);
 
     sigset_t set = {0};
-    int signo[2] = {SIGSEGV, SIGHUP};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_add_special_handler_009", signo, 2);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_2] = {SIGSEGV, SIGHUP};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_add_special_handler_009", signo, SIGCHIAN_TEST_SIGNAL_NUM_2);
 }
 
 int main(void)

libc-test/src/functionalext/sigchain/sigchain_add_special_handler_j.c

@@ -70,7 +70,7 @@ static bool sigchain_special_handler5(int signo, siginfo_t *siginfo, void *ucont
  */
 static bool sigchain_special_handler6(int signo, siginfo_t *siginfo, void *ucontext_raw)
 {
-    EXPECT_EQ("sigchain_add_special_handler_010", signo, 37);
+    EXPECT_EQ("sigchain_add_special_handler_010", signo, SIGCHAIN_SIGNAL_37);
     return false;
 }
 
@@ -79,7 +79,7 @@ static bool sigchain_special_handler6(int signo, siginfo_t *siginfo, void *ucont
  */
 static bool sigchain_special_handler7(int signo, siginfo_t *siginfo, void *ucontext_raw)
 {
-    EXPECT_EQ("sigchain_add_special_handler_010", signo, 43);
+    EXPECT_EQ("sigchain_add_special_handler_010", signo, SIGCHAIN_SIGNAL_43);
     return false;
 }
 
@@ -88,7 +88,7 @@ static bool sigchain_special_handler7(int signo, siginfo_t *siginfo, void *ucont
  */
 static bool sigchain_special_handler8(int signo, siginfo_t *siginfo, void *ucontext_raw)
 {
-    EXPECT_EQ("sigchain_add_special_handler_010", signo, 50);
+    EXPECT_EQ("sigchain_add_special_handler_010", signo, SIGCHAIN_SIGNAL_50);
     return false;
 }
 
@@ -97,7 +97,7 @@ static bool sigchain_special_handler8(int signo, siginfo_t *siginfo, void *ucont
  */
 static bool sigchain_special_handler9(int signo, siginfo_t *siginfo, void *ucontext_raw)
 {
-    EXPECT_EQ("sigchain_add_special_handler_010", signo, 56);
+    EXPECT_EQ("sigchain_add_special_handler_010", signo, SIGCHAIN_SIGNAL_56);
     return false;
 }
 
@@ -106,7 +106,7 @@ static bool sigchain_special_handler9(int signo, siginfo_t *siginfo, void *ucont
  */
 static bool sigchain_special_handler10(int signo, siginfo_t *siginfo, void *ucontext_raw)
 {
-    EXPECT_EQ("sigchain_add_special_handler_010", signo, 64);
+    EXPECT_EQ("sigchain_add_special_handler_010", signo, SIGCHAIN_SIGNAL_64);
     return false;
 }
 
@@ -158,39 +158,45 @@ static void sigchain_add_special_handler_010()
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(37, &sigsegv5);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_37, &sigsegv5);
 
     struct signal_chain_action sigsegv6 = {
         .sca_sigaction = sigchain_special_handler7,
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(43, &sigsegv6);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_43, &sigsegv6);
 
     struct signal_chain_action sigsegv7 = {
         .sca_sigaction = sigchain_special_handler8,
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(50, &sigsegv7);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_50, &sigsegv7);
 
     struct signal_chain_action sigsegv8 = {
         .sca_sigaction = sigchain_special_handler9,
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(56, &sigsegv8);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_56, &sigsegv8);
 
     struct signal_chain_action sigsegv9 = {
         .sca_sigaction = sigchain_special_handler10,
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(64, &sigsegv9);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_64, &sigsegv9);
 
     sigset_t set = {0};
-    int signo[10] = {SIGHUP, SIGABRT, SIGSEGV, SIGURG, SIGSYS, 37, 43, 50, 56, 64};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_add_special_handler_010", signo, 10);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_10] = {SIGHUP, SIGABRT,
+                                              SIGSEGV, SIGURG, SIGSYS,
+                                              SIGCHAIN_SIGNAL_37,
+                                              SIGCHAIN_SIGNAL_43,
+                                              SIGCHAIN_SIGNAL_50,
+                                              SIGCHAIN_SIGNAL_56,
+                                              SIGCHAIN_SIGNAL_64};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_add_special_handler_010", signo, SIGCHIAN_TEST_SIGNAL_NUM_10);
 }
 
 int main(void)
@@ -201,10 +207,10 @@ int main(void)
     raise(SIGSEGV);
     raise(SIGURG);
     raise(SIGSYS);
-    raise(37);
-    raise(43);
-    raise(50);
-    raise(56);
-    raise(64);
+    raise(SIGCHAIN_SIGNAL_37);
+    raise(SIGCHAIN_SIGNAL_43);
+    raise(SIGCHAIN_SIGNAL_50);
+    raise(SIGCHAIN_SIGNAL_56);
+    raise(SIGCHAIN_SIGNAL_64);
     return t_status;
 }
\ No newline at end of file

libc-test/src/functionalext/sigchain/sigchain_add_special_handler_k.c

@@ -70,7 +70,7 @@ static bool sigchain_special_handler5(int signo, siginfo_t *siginfo, void *ucont
  */
 static bool sigchain_special_handler6(int signo, siginfo_t *siginfo, void *ucontext_raw)
 {
-    EXPECT_EQ("sigchain_add_special_handler_011", signo, 37);
+    EXPECT_EQ("sigchain_add_special_handler_011", signo, SIGCHAIN_SIGNAL_37);
     return false;
 }
 
@@ -79,7 +79,7 @@ static bool sigchain_special_handler6(int signo, siginfo_t *siginfo, void *ucont
  */
 static bool sigchain_special_handler7(int signo, siginfo_t *siginfo, void *ucontext_raw)
 {
-    EXPECT_EQ("sigchain_add_special_handler_011", signo, 43);
+    EXPECT_EQ("sigchain_add_special_handler_011", signo, SIGCHAIN_SIGNAL_43);
     return false;
 }
 
@@ -88,7 +88,7 @@ static bool sigchain_special_handler7(int signo, siginfo_t *siginfo, void *ucont
  */
 static bool sigchain_special_handler8(int signo, siginfo_t *siginfo, void *ucontext_raw)
 {
-    EXPECT_EQ("sigchain_add_special_handler_011", signo, 50);
+    EXPECT_EQ("sigchain_add_special_handler_011", signo, SIGCHAIN_SIGNAL_50);
     return false;
 }
 
@@ -97,7 +97,7 @@ static bool sigchain_special_handler8(int signo, siginfo_t *siginfo, void *ucont
  */
 static bool sigchain_special_handler9(int signo, siginfo_t *siginfo, void *ucontext_raw)
 {
-    EXPECT_EQ("sigchain_add_special_handler_011", signo, 56);
+    EXPECT_EQ("sigchain_add_special_handler_011", signo, SIGCHAIN_SIGNAL_56);
     return false;
 }
 
@@ -106,7 +106,7 @@ static bool sigchain_special_handler9(int signo, siginfo_t *siginfo, void *ucont
  */
 static bool sigchain_special_handler10(int signo, siginfo_t *siginfo, void *ucontext_raw)
 {
-    EXPECT_EQ("sigchain_add_special_handler_011", signo, 64);
+    EXPECT_EQ("sigchain_add_special_handler_011", signo, SIGCHAIN_SIGNAL_64);
     return false;
 }
 
@@ -125,16 +125,16 @@ static void signal_handler(int signo)
         EXPECT_EQ("sigchain_add_special_handler_011", signo, SIGURG);
     } else if (signo == SIGSYS) {
         EXPECT_EQ("sigchain_add_special_handler_011", signo, SIGSYS);
-    } else if (signo == 37) {
-        EXPECT_EQ("sigchain_add_special_handler_011", signo, 37);
-    } else if (signo == 43) {
-        EXPECT_EQ("sigchain_add_special_handler_011", signo, 43);
-    } else if (signo == 50) {
-        EXPECT_EQ("sigchain_add_special_handler_011", signo, 50);
-    } else if (signo ==56) {
-        EXPECT_EQ("sigchain_add_special_handler_011", signo, 56);
+    } else if (signo == SIGCHAIN_SIGNAL_37) {
+        EXPECT_EQ("sigchain_add_special_handler_011", signo, SIGCHAIN_SIGNAL_37);
+    } else if (signo == SIGCHAIN_SIGNAL_43) {
+        EXPECT_EQ("sigchain_add_special_handler_011", signo, SIGCHAIN_SIGNAL_43);
+    } else if (signo == SIGCHAIN_SIGNAL_50) {
+        EXPECT_EQ("sigchain_add_special_handler_011", signo, SIGCHAIN_SIGNAL_50);
+    } else if (signo ==SIGCHAIN_SIGNAL_56) {
+        EXPECT_EQ("sigchain_add_special_handler_011", signo, SIGCHAIN_SIGNAL_56);
     } else {
-        EXPECT_EQ("sigchain_add_special_handler_011", signo, 64);
+        EXPECT_EQ("sigchain_add_special_handler_011", signo, SIGCHAIN_SIGNAL_64);
     }
 }
 
@@ -151,11 +151,11 @@ static void sigchain_add_special_handler_011()
     signal(SIGSEGV, signal_handler);
     signal(SIGURG, signal_handler);
     signal(SIGSYS, signal_handler);
-    signal(37, signal_handler);
-    signal(43, signal_handler);
-    signal(50, signal_handler);
-    signal(56, signal_handler);
-    signal(64, signal_handler);
+    signal(SIGCHAIN_SIGNAL_37, signal_handler);
+    signal(SIGCHAIN_SIGNAL_43, signal_handler);
+    signal(SIGCHAIN_SIGNAL_50, signal_handler);
+    signal(SIGCHAIN_SIGNAL_56, signal_handler);
+    signal(SIGCHAIN_SIGNAL_64, signal_handler);
 
     struct signal_chain_action sigsegv = {
         .sca_sigaction = sigchain_special_handler1,
@@ -197,39 +197,45 @@ static void sigchain_add_special_handler_011()
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(37, &sigsegv5);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_37, &sigsegv5);
 
     struct signal_chain_action sigsegv6 = {
         .sca_sigaction = sigchain_special_handler7,
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(43, &sigsegv6);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_43, &sigsegv6);
 
     struct signal_chain_action sigsegv7 = {
         .sca_sigaction = sigchain_special_handler8,
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(50, &sigsegv7);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_50, &sigsegv7);
 
     struct signal_chain_action sigsegv8 = {
         .sca_sigaction = sigchain_special_handler9,
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(56, &sigsegv8);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_56, &sigsegv8);
 
     struct signal_chain_action sigsegv9 = {
         .sca_sigaction = sigchain_special_handler10,
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(64, &sigsegv9);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_64, &sigsegv9);
 
     sigset_t set = {0};
-    int signo[10] = {SIGHUP, SIGABRT, SIGSEGV, SIGURG, SIGSYS, 37, 43, 50, 56, 64};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_add_special_handler_011", signo, 10);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_10] = {SIGHUP, SIGABRT, SIGSEGV,
+                                              SIGURG, SIGSYS,
+                                              SIGCHAIN_SIGNAL_37,
+                                              SIGCHAIN_SIGNAL_43,
+                                              SIGCHAIN_SIGNAL_50,
+                                              SIGCHAIN_SIGNAL_56,
+                                              SIGCHAIN_SIGNAL_64};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_add_special_handler_011", signo, SIGCHIAN_TEST_SIGNAL_NUM_10);
 }
 
 int main(void)
@@ -240,10 +246,10 @@ int main(void)
     raise(SIGSEGV);
     raise(SIGURG);
     raise(SIGSYS);
-    raise(37);
-    raise(43);
-    raise(50);
-    raise(56);
-    raise(64);
+    raise(SIGCHAIN_SIGNAL_37);
+    raise(SIGCHAIN_SIGNAL_43);
+    raise(SIGCHAIN_SIGNAL_50);
+    raise(SIGCHAIN_SIGNAL_56);
+    raise(SIGCHAIN_SIGNAL_64);
     return t_status;
 }
\ No newline at end of file

libc-test/src/functionalext/sigchain/sigchain_add_special_handler_l.c

@@ -71,7 +71,7 @@ static bool sigchain_special_handler5(int signo, siginfo_t *siginfo, void *ucont
  */
 static bool sigchain_special_handler6(int signo, siginfo_t *siginfo, void *ucontext_raw)
 {
-    EXPECT_EQ("sigchain_add_special_handler_012", signo, 37);
+    EXPECT_EQ("sigchain_add_special_handler_012", signo, SIGCHAIN_SIGNAL_37);
     return false;
 }
 
@@ -80,7 +80,7 @@ static bool sigchain_special_handler6(int signo, siginfo_t *siginfo, void *ucont
  */
 static bool sigchain_special_handler7(int signo, siginfo_t *siginfo, void *ucontext_raw)
 {
-    EXPECT_EQ("sigchain_add_special_handler_012", signo, 43);
+    EXPECT_EQ("sigchain_add_special_handler_012", signo, SIGCHAIN_SIGNAL_43);
     return false;
 }
 
@@ -89,7 +89,7 @@ static bool sigchain_special_handler7(int signo, siginfo_t *siginfo, void *ucont
  */
 static bool sigchain_special_handler8(int signo, siginfo_t *siginfo, void *ucontext_raw)
 {
-    EXPECT_EQ("sigchain_add_special_handler_012", signo, 50);
+    EXPECT_EQ("sigchain_add_special_handler_012", signo, SIGCHAIN_SIGNAL_50);
     return false;
 }
 
@@ -98,7 +98,7 @@ static bool sigchain_special_handler8(int signo, siginfo_t *siginfo, void *ucont
  */
 static bool sigchain_special_handler9(int signo, siginfo_t *siginfo, void *ucontext_raw)
 {
-    EXPECT_EQ("sigchain_add_special_handler_012", signo, 56);
+    EXPECT_EQ("sigchain_add_special_handler_012", signo, SIGCHAIN_SIGNAL_56);
     return false;
 }
 
@@ -107,7 +107,7 @@ static bool sigchain_special_handler9(int signo, siginfo_t *siginfo, void *ucont
  */
 static bool sigchain_special_handler10(int signo, siginfo_t *siginfo, void *ucontext_raw)
 {
-    EXPECT_EQ("sigchain_add_special_handler_012", signo, 64);
+    EXPECT_EQ("sigchain_add_special_handler_012", signo, SIGCHAIN_SIGNAL_64);
     return false;
 }
 
@@ -126,16 +126,16 @@ static void signal_sigaction(int signo)
         EXPECT_EQ("sigchain_add_special_handler_012", signo, SIGURG);
     } else if (signo == SIGSYS) {
         EXPECT_EQ("sigchain_add_special_handler_012", signo, SIGSYS);
-    } else if (signo == 37) {
-        EXPECT_EQ("sigchain_add_special_handler_012", signo, 37);
-    } else if (signo == 43) {
-        EXPECT_EQ("sigchain_add_special_handler_012", signo, 43);
-    } else if (signo == 50) {
-        EXPECT_EQ("sigchain_add_special_handler_012", signo, 50);
-    } else if (signo ==56) {
-        EXPECT_EQ("sigchain_add_special_handler_012", signo, 56);
+    } else if (signo == SIGCHAIN_SIGNAL_37) {
+        EXPECT_EQ("sigchain_add_special_handler_012", signo, SIGCHAIN_SIGNAL_37);
+    } else if (signo == SIGCHAIN_SIGNAL_43) {
+        EXPECT_EQ("sigchain_add_special_handler_012", signo, SIGCHAIN_SIGNAL_43);
+    } else if (signo == SIGCHAIN_SIGNAL_50) {
+        EXPECT_EQ("sigchain_add_special_handler_012", signo, SIGCHAIN_SIGNAL_50);
+    } else if (signo ==SIGCHAIN_SIGNAL_56) {
+        EXPECT_EQ("sigchain_add_special_handler_012", signo, SIGCHAIN_SIGNAL_56);
     } else {
-        EXPECT_EQ("sigchain_add_special_handler_012", signo, 64);
+        EXPECT_EQ("sigchain_add_special_handler_012", signo, SIGCHAIN_SIGNAL_64);
     }
 }
 
@@ -175,27 +175,27 @@ static void sigchain_add_special_handler_012()
     struct sigaction sigaction5 = {
         .sa_handler = signal_sigaction,
     };
-    sigaction(37, &sigaction5, NULL);
+    sigaction(SIGCHAIN_SIGNAL_37, &sigaction5, NULL);
 
     struct sigaction sigaction6 = {
         .sa_handler = signal_sigaction,
     };
-    sigaction(43, &sigaction6, NULL);
+    sigaction(SIGCHAIN_SIGNAL_43, &sigaction6, NULL);
 
     struct sigaction sigaction7 = {
         .sa_handler = signal_sigaction,
     };
-    sigaction(50, &sigaction7, NULL);
+    sigaction(SIGCHAIN_SIGNAL_50, &sigaction7, NULL);
 
     struct sigaction sigaction8 = {
         .sa_handler = signal_sigaction,
     };
-    sigaction(56, &sigaction8, NULL);
+    sigaction(SIGCHAIN_SIGNAL_56, &sigaction8, NULL);
 
     struct sigaction sigaction9 = {
         .sa_handler = signal_sigaction,
     };
-    sigaction(64, &sigaction9, NULL);
+    sigaction(SIGCHAIN_SIGNAL_64, &sigaction9, NULL);
 
     struct signal_chain_action sigsegv = {
         .sca_sigaction = sigchain_special_handler1,
@@ -237,39 +237,44 @@ static void sigchain_add_special_handler_012()
         .sca_mask = {},
         .sca_flags = SIGCHAIN_ALLOW_NORETURN,
     };
-    add_special_signal_handler(37, &sigsegv5);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_37, &sigsegv5);
 
     struct signal_chain_action sigsegv6 = {
         .sca_sigaction = sigchain_special_handler7,
         .sca_mask = {},
         .sca_flags = SIGCHAIN_ALLOW_NORETURN,
     };
-    add_special_signal_handler(43, &sigsegv6);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_43, &sigsegv6);
 
     struct signal_chain_action sigsegv7 = {
         .sca_sigaction = sigchain_special_handler8,
         .sca_mask = {},
         .sca_flags = SIGCHAIN_ALLOW_NORETURN,
     };
-    add_special_signal_handler(50, &sigsegv7);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_50, &sigsegv7);
 
     struct signal_chain_action sigsegv8 = {
         .sca_sigaction = sigchain_special_handler9,
         .sca_mask = {},
         .sca_flags = SIGCHAIN_ALLOW_NORETURN,
     };
-    add_special_signal_handler(56, &sigsegv8);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_56, &sigsegv8);
 
     struct signal_chain_action sigsegv9 = {
         .sca_sigaction = sigchain_special_handler10,
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(64, &sigsegv9);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_64, &sigsegv9);
 
     sigset_t set = {0};
-    int signo[10] = {SIGHUP, SIGABRT, SIGSEGV, SIGURG, SIGSYS, 37, 43, 50, 56, 64};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_add_special_handler_012", signo, 10);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_10] = {SIGHUP, SIGABRT, SIGSEGV, SIGURG, SIGSYS,
+                                              SIGCHAIN_SIGNAL_37,
+                                              SIGCHAIN_SIGNAL_43,
+                                              SIGCHAIN_SIGNAL_50,
+                                              SIGCHAIN_SIGNAL_56,
+                                              SIGCHAIN_SIGNAL_64};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_add_special_handler_012", signo, SIGCHIAN_TEST_SIGNAL_NUM_10);
 }
 
 int main(void)
@@ -280,10 +285,10 @@ int main(void)
     raise(SIGSEGV);
     raise(SIGURG);
     raise(SIGSYS);
-    raise(37);
-    raise(43);
-    raise(50);
-    raise(56);
-    raise(64);
+    raise(SIGCHAIN_SIGNAL_37);
+    raise(SIGCHAIN_SIGNAL_43);
+    raise(SIGCHAIN_SIGNAL_50);
+    raise(SIGCHAIN_SIGNAL_56);
+    raise(SIGCHAIN_SIGNAL_64);
     return t_status;
 }
\ No newline at end of file

libc-test/src/functionalext/sigchain/sigchain_add_special_handler_m.c

@@ -18,6 +18,7 @@
 #include <stdlib.h>
 #include "test.h"
 #include "functionalext.h"
+#include "sigchain_util.h"
 
 /**
  * @brief the special handler
@@ -56,7 +57,7 @@ static void sigchain_add_special_handler_013()
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(65, &sigsegv1);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_65, &sigsegv1);
 }
 
 int main(void)

libc-test/src/functionalext/sigchain/sigchain_intercept_sigaction_b.c

@@ -87,8 +87,8 @@ static void sigchain_intercept_sigaction_002()
     sigaction(SIGSEGV, &siga2, NULL);
 
     sigset_t set = {0};
-    int signo[2] = {SIGSEGV, SIGHUP};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_intercept_sigaction_002", signo, 2);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_2] = {SIGSEGV, SIGHUP};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_intercept_sigaction_002", signo, SIGCHIAN_TEST_SIGNAL_NUM_2);
 }
 
 int main(void)

libc-test/src/functionalext/sigchain/sigchain_intercept_sigaction_c.c

@@ -87,8 +87,8 @@ static void sigchain_intercept_sigaction_003()
     sigaction(SIGSEGV, &siga2, NULL);
 
     sigset_t set = {0};
-    int signo[2] = {SIGSEGV, SIGHUP};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_intercept_sigaction_002", signo, 2);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_2] = {SIGSEGV, SIGHUP};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_intercept_sigaction_002", signo, SIGCHIAN_TEST_SIGNAL_NUM_2);
 
     remove_special_signal_handler(SIGHUP, sigchain_special_handler);
     remove_special_signal_handler(SIGSEGV, sigchain_special_handler1);

libc-test/src/functionalext/sigchain/sigchain_intercept_signal_b.c

@@ -80,8 +80,8 @@ static void sigchain_intercept_signal_002()
     signal(SIGSEGV, signal_handler2);
 
     sigset_t set = {0};
-    int signo[2] = {SIGSEGV, SIGHUP};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_intercept_signal_002", signo, 2);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_2] = {SIGSEGV, SIGHUP};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_intercept_signal_002", signo, SIGCHIAN_TEST_SIGNAL_NUM_2);
 }
 
 int main(void)

libc-test/src/functionalext/sigchain/sigchain_intercept_signal_c.c

@@ -83,8 +83,8 @@ static void sigchain_intercept_signal_003()
     remove_special_signal_handler(SIGSEGV, sigchain_special_handler1);
 
     sigset_t set = {0};
-    int signo[2] = {SIGSEGV, SIGHUP};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_intercept_sigaction_002", signo, 2);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_2] = {SIGSEGV, SIGHUP};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_intercept_sigaction_002", signo, SIGCHIAN_TEST_SIGNAL_NUM_2);
 }
 
 int main(void)

libc-test/src/functionalext/sigchain/sigchain_intercept_sigprocmask_a.c

@@ -55,8 +55,8 @@ static void sigchain_intercept_sigprocmask_001()
     sigaction(SIGSEGV, &siga2, NULL);
 
     sigset_t set = {0};
-    int signo[2] = {SIGHUP, SIGSEGV};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_intercept_sigprocmask_001", signo, 2);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_2] = {SIGHUP, SIGSEGV};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_intercept_sigprocmask_001", signo, SIGCHIAN_TEST_SIGNAL_NUM_2);
 }
 
 int main(void)

libc-test/src/functionalext/sigchain/sigchain_intercept_sigprocmask_b.c

@@ -87,8 +87,8 @@ static void sigchain_intercept_sigprocmask_002()
     add_special_signal_handler(SIGSEGV, &sigsegv1);
 
     sigset_t set = {0};
-    int signo[2] = {SIGHUP, SIGSEGV};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_intercept_sigprocmask_002", signo, 2);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_2] = {SIGHUP, SIGSEGV};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_intercept_sigprocmask_002", signo, SIGCHIAN_TEST_SIGNAL_NUM_2);
 }
 
 int main(void)

libc-test/src/functionalext/sigchain/sigchain_intercept_sigprocmask_c.c

@@ -87,8 +87,8 @@ static void sigchain_intercept_sigprocmask_003()
     add_special_signal_handler(SIGSEGV, &sigsegv1);
 
     sigset_t set = {0};
-    int signo[2] = {SIGHUP, SIGSEGV};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_intercept_sigprocmask_003", signo, 2);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_2] = {SIGHUP, SIGSEGV};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_intercept_sigprocmask_003", signo, SIGCHIAN_TEST_SIGNAL_NUM_2);
 
     remove_special_signal_handler(SIGHUP, sigchain_special_handler);
     remove_special_signal_handler(SIGSEGV, sigchain_special_handler1);

libc-test/src/functionalext/sigchain/sigchain_intercept_sigprocmask_d.c

@@ -88,8 +88,8 @@ static void sigchain_intercept_sigprocmask_004()
     add_special_signal_handler(SIGSEGV, &sigsegv1);
 
     sigset_t set = {0};
-    int signo[2] = {SIGHUP, SIGSEGV};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_intercept_sigprocmask_004", signo, 2);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_2] = {SIGHUP, SIGSEGV};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_intercept_sigprocmask_004", signo, SIGCHIAN_TEST_SIGNAL_NUM_2);
 }
 
 void thread_func(void *data)

libc-test/src/functionalext/sigchain/sigchain_rm_special_handler_b.c

@@ -55,8 +55,8 @@ static void sigchain_rm_special_handler_002()
     add_special_signal_handler(SIGSEGV, &sigsegv);
 
     sigset_t set = {0};
-    int signo[1] = {SIGSEGV};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_add_special_handler_002", signo, 1);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_1] = {SIGSEGV};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_add_special_handler_002", signo, SIGCHIAN_TEST_SIGNAL_NUM_1);
 
     remove_special_signal_handler(SIGSEGV, sigchain_special_handler);
 }

libc-test/src/functionalext/sigchain/sigchain_rm_special_handler_c.c

@@ -58,8 +58,8 @@ static void sigchain_rm_special_handler_003()
     add_special_signal_handler(SIGSEGV, &sigsegv);
 
     sigset_t set = {0};
-    int signo[1] = {SIGSEGV};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_rm_special_handler_003", signo, 1);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_1] = {SIGSEGV};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_rm_special_handler_003", signo, SIGCHIAN_TEST_SIGNAL_NUM_1);
 
     remove_special_signal_handler(SIGSEGV, sigchain_special_handler);
 }

libc-test/src/functionalext/sigchain/sigchain_rm_special_handler_d.c

@@ -77,8 +77,8 @@ static void sigchain_rm_special_handler_004()
     add_special_signal_handler(SIGHUP, &sigsegv2);
 
     sigset_t set = {0};
-    int signo[1] = {SIGHUP};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_rm_special_handler_004", signo, 1);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_1] = {SIGHUP};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_rm_special_handler_004", signo, SIGCHIAN_TEST_SIGNAL_NUM_1);
 
     remove_special_signal_handler(SIGHUP, sigchain_special_handler3);
     remove_special_signal_handler(SIGHUP, sigchain_special_handler2);

libc-test/src/functionalext/sigchain/sigchain_rm_special_handler_e.c

@@ -87,8 +87,8 @@ static void sigchain_rm_special_handler_005()
     add_special_signal_handler(SIGSEGV, &sigsegv2);
 
     sigset_t set = {0};
-    int signo[1] = {SIGSEGV};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_rm_special_handler_005", signo, 1);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_1] = {SIGSEGV};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_rm_special_handler_005", signo, SIGCHIAN_TEST_SIGNAL_NUM_1);
 
     remove_special_signal_handler(SIGSEGV, sigchain_special_handler3);
     remove_special_signal_handler(SIGSEGV, sigchain_special_handler2);

libc-test/src/functionalext/sigchain/sigchain_rm_special_handler_f.c

@@ -90,8 +90,8 @@ static void sigchain_rm_special_handler_006()
     add_special_signal_handler(SIGSEGV, &sigsegv3);
 
     sigset_t set = {0};
-    int signo[1] = {SIGSEGV};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_rm_special_handler_006", signo, 1);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_1] = {SIGSEGV};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_rm_special_handler_006", signo, SIGCHIAN_TEST_SIGNAL_NUM_1);
 
     remove_special_signal_handler(SIGSEGV, sigchain_special_handler3);
     remove_special_signal_handler(SIGSEGV, sigchain_special_handler2);

libc-test/src/functionalext/sigchain/sigchain_rm_special_handler_g.c

@@ -61,8 +61,8 @@ static void sigchain_rm_special_handler_007()
     add_special_signal_handler(SIGHUP, &sigsegv1);
 
     sigset_t set = {0};
-    int signo[2] = {SIGSEGV, SIGHUP};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_rm_special_handler_007", signo, 2);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_2] = {SIGSEGV, SIGHUP};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_rm_special_handler_007", signo, SIGCHIAN_TEST_SIGNAL_NUM_2);
 
     remove_special_signal_handler(SIGHUP, sigchain_special_handler1);
     remove_special_signal_handler(64, sigchain_special_handler2);

libc-test/src/functionalext/sigchain/sigchain_rm_special_handler_h.c

@@ -76,8 +76,8 @@ static void sigchain_rm_special_handler_008()
     add_special_signal_handler(SIGHUP, &sigsegv1);
 
     sigset_t set = {0};
-    int signo[2] = {SIGSEGV, SIGHUP};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_rm_special_handler_008", signo, 2);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_2] = {SIGSEGV, SIGHUP};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_rm_special_handler_008", signo, SIGCHIAN_TEST_SIGNAL_NUM_2);
 
     remove_special_signal_handler(SIGHUP, sigchain_special_handler2);
     remove_special_signal_handler(SIGSEGV, sigchain_special_handler1);

libc-test/src/functionalext/sigchain/sigchain_rm_special_handler_i.c

@@ -83,8 +83,8 @@ static void sigchain_rm_special_handler_009()
     add_special_signal_handler(SIGHUP, &sighup);
 
     sigset_t set = {0};
-    int signo[2] = {SIGSEGV, SIGHUP};
-    SIGCHIAN_TEST_SET_MASK(set, "sigchain_rm_special_handler_009", signo, 2);
+    int signo[SIGCHIAN_TEST_SIGNAL_NUM_2] = {SIGSEGV, SIGHUP};
+    SIGCHAIN_TEST_SET_MASK(set, "sigchain_rm_special_handler_009", signo, SIGCHIAN_TEST_SIGNAL_NUM_2);
 
     remove_special_signal_handler(SIGHUP, sigchain_special_handler2);
     remove_special_signal_handler(SIGSEGV, sigchain_special_handler1);

libc-test/src/functionalext/sigchain/sigchain_rm_special_handler_j.c

@@ -18,6 +18,7 @@
 #include <stdlib.h>
 #include "test.h"
 #include "functionalext.h"
+#include "sigchain_util.h"
 
 /**
  * @brief the special handler
@@ -157,54 +158,54 @@ static void sigchain_rm_special_handler_010()
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(37, &sigsegv5);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_37, &sigsegv5);
 
     struct signal_chain_action sigsegv6 = {
         .sca_sigaction = sigchain_special_handler7,
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(43, &sigsegv6);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_43, &sigsegv6);
 
     struct signal_chain_action sigsegv7 = {
         .sca_sigaction = sigchain_special_handler8,
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(50, &sigsegv7);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_50, &sigsegv7);
 
     struct signal_chain_action sigsegv8 = {
         .sca_sigaction = sigchain_special_handler9,
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(56, &sigsegv8);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_56, &sigsegv8);
 
     struct signal_chain_action sigsegv9 = {
         .sca_sigaction = sigchain_special_handler10,
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(64, &sigsegv9);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_64, &sigsegv9);
 
     remove_special_signal_handler(SIGHUP, sigchain_special_handler1);
     remove_special_signal_handler(SIGABRT, sigchain_special_handler2);
     remove_special_signal_handler(SIGSEGV, sigchain_special_handler3);
     remove_special_signal_handler(SIGURG, sigchain_special_handler4);
     remove_special_signal_handler(SIGSYS, sigchain_special_handler5);
-    remove_special_signal_handler(37, sigchain_special_handler6);
-    remove_special_signal_handler(43, sigchain_special_handler7);
-    remove_special_signal_handler(50, sigchain_special_handler8);
-    remove_special_signal_handler(56, sigchain_special_handler9);
-    remove_special_signal_handler(64, sigchain_special_handler10);
+    remove_special_signal_handler(SIGCHAIN_SIGNAL_37, sigchain_special_handler6);
+    remove_special_signal_handler(SIGCHAIN_SIGNAL_43, sigchain_special_handler7);
+    remove_special_signal_handler(SIGCHAIN_SIGNAL_50, sigchain_special_handler8);
+    remove_special_signal_handler(SIGCHAIN_SIGNAL_56, sigchain_special_handler9);
+    remove_special_signal_handler(SIGCHAIN_SIGNAL_64, sigchain_special_handler10);
 
     raise(SIGHUP);
     raise(SIGURG);
-    raise(37);
-    raise(43);
-    raise(50);
-    raise(56);
-    raise(64);
+    raise(SIGCHAIN_SIGNAL_37);
+    raise(SIGCHAIN_SIGNAL_43);
+    raise(SIGCHAIN_SIGNAL_50);
+    raise(SIGCHAIN_SIGNAL_56);
+    raise(SIGCHAIN_SIGNAL_64);
 }
 
 int main(void)

libc-test/src/functionalext/sigchain/sigchain_rm_special_handler_k.c

@@ -18,6 +18,7 @@
 #include <stdlib.h>
 #include "test.h"
 #include "functionalext.h"
+#include "sigchain_util.h"
 
 /**
  * @brief the special handler
@@ -124,16 +125,16 @@ static void signal_handler(int signo)
         EXPECT_EQ("sigchain_rm_special_handler_011", signo, SIGURG);
     } else if (signo == SIGSYS) {
         EXPECT_EQ("sigchain_rm_special_handler_011", signo, SIGSYS);
-    } else if (signo == 37) {
-        EXPECT_EQ("sigchain_rm_special_handler_011", signo, 37);
-    } else if (signo == 43) {
-        EXPECT_EQ("sigchain_rm_special_handler_011", signo, 43);
-    } else if (signo == 50) {
-        EXPECT_EQ("sigchain_rm_special_handler_011", signo, 50);
-    } else if (signo == 56) {
-        EXPECT_EQ("sigchain_rm_special_handler_011", signo, 56);
+    } else if (signo == SIGCHAIN_SIGNAL_37) {
+        EXPECT_EQ("sigchain_rm_special_handler_011", signo, SIGCHAIN_SIGNAL_37);
+    } else if (signo == SIGCHAIN_SIGNAL_43) {
+        EXPECT_EQ("sigchain_rm_special_handler_011", signo, SIGCHAIN_SIGNAL_43);
+    } else if (signo == SIGCHAIN_SIGNAL_50) {
+        EXPECT_EQ("sigchain_rm_special_handler_011", signo, SIGCHAIN_SIGNAL_50);
+    } else if (signo == SIGCHAIN_SIGNAL_56) {
+        EXPECT_EQ("sigchain_rm_special_handler_011", signo, SIGCHAIN_SIGNAL_56);
     } else {
-        EXPECT_EQ("sigchain_rm_special_handler_011", signo, 64);
+        EXPECT_EQ("sigchain_rm_special_handler_011", signo, SIGCHAIN_SIGNAL_64);
     }
 }
 
@@ -150,11 +151,11 @@ static void sigchain_rm_special_handler_011()
     signal(SIGSEGV, signal_handler);
     signal(SIGURG, signal_handler);
     signal(SIGSYS, signal_handler);
-    signal(37, signal_handler);
-    signal(43, signal_handler);
-    signal(50, signal_handler);
-    signal(56, signal_handler);
-    signal(64, signal_handler);
+    signal(SIGCHAIN_SIGNAL_37, signal_handler);
+    signal(SIGCHAIN_SIGNAL_43, signal_handler);
+    signal(SIGCHAIN_SIGNAL_50, signal_handler);
+    signal(SIGCHAIN_SIGNAL_56, signal_handler);
+    signal(SIGCHAIN_SIGNAL_64, signal_handler);
 
     struct signal_chain_action sigsegv = {
         .sca_sigaction = sigchain_special_handler1,
@@ -196,46 +197,46 @@ static void sigchain_rm_special_handler_011()
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(37, &sigsegv5);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_37, &sigsegv5);
 
     struct signal_chain_action sigsegv6 = {
         .sca_sigaction = sigchain_special_handler7,
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(43, &sigsegv6);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_43, &sigsegv6);
 
     struct signal_chain_action sigsegv7 = {
         .sca_sigaction = sigchain_special_handler8,
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(50, &sigsegv7);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_50, &sigsegv7);
 
     struct signal_chain_action sigsegv8 = {
         .sca_sigaction = sigchain_special_handler9,
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(56, &sigsegv8);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_56, &sigsegv8);
 
     struct signal_chain_action sigsegv9 = {
         .sca_sigaction = sigchain_special_handler10,
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(64, &sigsegv9);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_64, &sigsegv9);
 
     remove_special_signal_handler(SIGHUP, sigchain_special_handler1);
     remove_special_signal_handler(SIGABRT, sigchain_special_handler2);
     remove_special_signal_handler(SIGSEGV, sigchain_special_handler3);
     remove_special_signal_handler(SIGURG, sigchain_special_handler4);
     remove_special_signal_handler(SIGSYS, sigchain_special_handler5);
-    remove_special_signal_handler(37, sigchain_special_handler6);
-    remove_special_signal_handler(43, sigchain_special_handler7);
-    remove_special_signal_handler(50, sigchain_special_handler8);
-    remove_special_signal_handler(56, sigchain_special_handler9);
-    remove_special_signal_handler(64, sigchain_special_handler10);
+    remove_special_signal_handler(SIGCHAIN_SIGNAL_37, sigchain_special_handler6);
+    remove_special_signal_handler(SIGCHAIN_SIGNAL_43, sigchain_special_handler7);
+    remove_special_signal_handler(SIGCHAIN_SIGNAL_50, sigchain_special_handler8);
+    remove_special_signal_handler(SIGCHAIN_SIGNAL_56, sigchain_special_handler9);
+    remove_special_signal_handler(SIGCHAIN_SIGNAL_64, sigchain_special_handler10);
 }
 
 int main(void)
@@ -246,10 +247,10 @@ int main(void)
     raise(SIGSEGV);
     raise(SIGURG);
     raise(SIGSYS);
-    raise(37);
-    raise(43);
-    raise(50);
-    raise(56);
-    raise(64);
+    raise(SIGCHAIN_SIGNAL_37);
+    raise(SIGCHAIN_SIGNAL_43);
+    raise(SIGCHAIN_SIGNAL_50);
+    raise(SIGCHAIN_SIGNAL_56);
+    raise(SIGCHAIN_SIGNAL_64);
     return t_status;
 }
\ No newline at end of file

libc-test/src/functionalext/sigchain/sigchain_rm_special_handler_l.c

@@ -18,6 +18,7 @@
 #include <stdlib.h>
 #include "test.h"
 #include "functionalext.h"
+#include "sigchain_util.h"
 
 /**
  * @brief the special handler
@@ -124,16 +125,16 @@ static void signal_sigaction(int signo)
         EXPECT_EQ("sigchain_rm_special_handler_012", signo, SIGURG);
     } else if (signo == SIGSYS) {
         EXPECT_EQ("sigchain_rm_special_handler_012", signo, SIGSYS);
-    } else if (signo == 37) {
-        EXPECT_EQ("sigchain_rm_special_handler_012", signo, 37);
-    } else if (signo == 43) {
-        EXPECT_EQ("sigchain_rm_special_handler_012", signo, 43);
-    } else if (signo == 50) {
-        EXPECT_EQ("sigchain_rm_special_handler_012", signo, 50);
-    } else if (signo == 56) {
-        EXPECT_EQ("sigchain_rm_special_handler_012", signo, 56);
+    } else if (signo == SIGCHAIN_SIGNAL_37) {
+        EXPECT_EQ("sigchain_rm_special_handler_012", signo, SIGCHAIN_SIGNAL_37);
+    } else if (signo == SIGCHAIN_SIGNAL_43) {
+        EXPECT_EQ("sigchain_rm_special_handler_012", signo, SIGCHAIN_SIGNAL_43);
+    } else if (signo == SIGCHAIN_SIGNAL_50) {
+        EXPECT_EQ("sigchain_rm_special_handler_012", signo, SIGCHAIN_SIGNAL_50);
+    } else if (signo == SIGCHAIN_SIGNAL_56) {
+        EXPECT_EQ("sigchain_rm_special_handler_012", signo, SIGCHAIN_SIGNAL_56);
     } else {
-        EXPECT_EQ("sigchain_rm_special_handler_012", signo, 64);
+        EXPECT_EQ("sigchain_rm_special_handler_012", signo, SIGCHAIN_SIGNAL_64);
     }
 }
 
@@ -173,27 +174,27 @@ static void sigchain_rm_special_handler_012()
     struct sigaction sigaction5 = {
         .sa_handler = signal_sigaction,
     };
-    sigaction(37, &sigaction5, NULL);
+    sigaction(SIGCHAIN_SIGNAL_37, &sigaction5, NULL);
 
     struct sigaction sigaction6 = {
         .sa_handler = signal_sigaction,
     };
-    sigaction(43, &sigaction6, NULL);
+    sigaction(SIGCHAIN_SIGNAL_43, &sigaction6, NULL);
 
     struct sigaction sigaction7 = {
         .sa_handler = signal_sigaction,
     };
-    sigaction(50, &sigaction7, NULL);
+    sigaction(SIGCHAIN_SIGNAL_50, &sigaction7, NULL);
 
     struct sigaction sigaction8 = {
         .sa_handler = signal_sigaction,
     };
-    sigaction(56, &sigaction8, NULL);
+    sigaction(SIGCHAIN_SIGNAL_56, &sigaction8, NULL);
 
     struct sigaction sigaction9 = {
         .sa_handler = signal_sigaction,
     };
-    sigaction(64, &sigaction9, NULL);
+    sigaction(SIGCHAIN_SIGNAL_64, &sigaction9, NULL);
 
     struct signal_chain_action sigsegv = {
         .sca_sigaction = sigchain_special_handler1,
@@ -235,46 +236,46 @@ static void sigchain_rm_special_handler_012()
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(37, &sigsegv5);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_37, &sigsegv5);
 
     struct signal_chain_action sigsegv6 = {
         .sca_sigaction = sigchain_special_handler7,
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(43, &sigsegv6);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_43, &sigsegv6);
 
     struct signal_chain_action sigsegv7 = {
         .sca_sigaction = sigchain_special_handler8,
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(50, &sigsegv7);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_50, &sigsegv7);
 
     struct signal_chain_action sigsegv8 = {
         .sca_sigaction = sigchain_special_handler9,
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(56, &sigsegv8);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_56, &sigsegv8);
 
     struct signal_chain_action sigsegv9 = {
         .sca_sigaction = sigchain_special_handler10,
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(64, &sigsegv9);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_64, &sigsegv9);
 
     remove_special_signal_handler(SIGHUP, sigchain_special_handler1);
     remove_special_signal_handler(SIGABRT, sigchain_special_handler2);
     remove_special_signal_handler(SIGSEGV, sigchain_special_handler3);
     remove_special_signal_handler(SIGURG, sigchain_special_handler4);
     remove_special_signal_handler(SIGSYS, sigchain_special_handler5);
-    remove_special_signal_handler(37, sigchain_special_handler6);
-    remove_special_signal_handler(43, sigchain_special_handler7);
-    remove_special_signal_handler(50, sigchain_special_handler8);
-    remove_special_signal_handler(56, sigchain_special_handler9);
-    remove_special_signal_handler(64, sigchain_special_handler10);
+    remove_special_signal_handler(SIGCHAIN_SIGNAL_37, sigchain_special_handler6);
+    remove_special_signal_handler(SIGCHAIN_SIGNAL_43, sigchain_special_handler7);
+    remove_special_signal_handler(SIGCHAIN_SIGNAL_50, sigchain_special_handler8);
+    remove_special_signal_handler(SIGCHAIN_SIGNAL_56, sigchain_special_handler9);
+    remove_special_signal_handler(SIGCHAIN_SIGNAL_64, sigchain_special_handler10);
 }
 
 int main(void)
@@ -285,10 +286,10 @@ int main(void)
     raise(SIGSEGV);
     raise(SIGURG);
     raise(SIGSYS);
-    raise(37);
-    raise(43);
-    raise(50);
-    raise(56);
-    raise(64);
+    raise(SIGCHAIN_SIGNAL_37);
+    raise(SIGCHAIN_SIGNAL_43);
+    raise(SIGCHAIN_SIGNAL_50);
+    raise(SIGCHAIN_SIGNAL_56);
+    raise(SIGCHAIN_SIGNAL_64);
     return t_status;
 }
\ No newline at end of file

libc-test/src/functionalext/sigchain/sigchain_rm_special_handler_m.c

@@ -18,6 +18,7 @@
 #include <stdlib.h>
 #include "test.h"
 #include "functionalext.h"
+#include "sigchain_util.h"
 
 /**
  * @brief the special handler
@@ -56,10 +57,10 @@ static void sigchain_rm_special_handler_013()
         .sca_mask = {},
         .sca_flags = 0,
     };
-    add_special_signal_handler(65, &sigsegv1);
+    add_special_signal_handler(SIGCHAIN_SIGNAL_65, &sigsegv1);
 
     remove_special_signal_handler(0, sigchain_special_handler);
-    remove_special_signal_handler(65, sigchain_special_handler1);
+    remove_special_signal_handler(SIGCHAIN_SIGNAL_65, sigchain_special_handler1);
 }
 
 int main(void)

porting/linux/user/include/sigchain.h

@@ -16,9 +16,6 @@
 #ifndef _SIGCHAIN_H
 #define _SIGCHAIN_H
 
-#ifdef __cplusplus
-extern "C" {
-#endif
 #ifndef _GNU_SOURCE
 #define _GNU_SOURCE
 #endif
@@ -26,13 +23,17 @@ extern "C" {
 #include <stdint.h>
 #include <stdbool.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 static const int SIGCHAIN_ALLOW_NORETURN = 0x1UL;
 
 /* The action of the sigchain. */
 struct signal_chain_action {
-  bool (*sca_sigaction)(int, siginfo_t*, void*);
-  sigset_t sca_mask;
-  int sca_flags;
+    bool (*sca_sigaction)(int, siginfo_t*, void*);
+    sigset_t sca_mask;
+    int sca_flags;
 };
 
 /* Mark the signal to the sigchain, add the special handler to the sigchain. */

porting/linux/user/src/sigchain/sigchain.c

@@ -30,9 +30,12 @@ extern int __libc_sigaction(int sig, const struct sigaction *restrict sa,
 #define SIGCHAIN_LOG_TAG "SIGCHAIN"
 
 #if (defined(OHOS_ENABLE_PARAMETER) || defined(ENABLE_MUSL_LOG))
-#define SIGCHAIN_PRINT_ERROR(...) ((void)HiLogAdapterPrint(LOG_CORE, LOG_ERROR, SIGCHAIN_LOG_DOMAIN, SIGCHAIN_LOG_TAG, __VA_ARGS__))
-#define SIGCHAIN_PRINT_INFO(...) ((void)HiLogAdapterPrint(LOG_CORE, LOG_INFO, SIGCHAIN_LOG_DOMAIN, SIGCHAIN_LOG_TAG, __VA_ARGS__))
-#define SIGCHAIN_PRINT_DEBUG(...) ((void)HiLogAdapterPrint(LOG_CORE, LOG_DEBUG, SIGCHAIN_LOG_DOMAIN, SIGCHAIN_LOG_TAG, __VA_ARGS__))
+#define SIGCHAIN_PRINT_ERROR(...) ((void)HiLogAdapterPrint(LOG_CORE, LOG_ERROR, \
+    SIGCHAIN_LOG_DOMAIN, SIGCHAIN_LOG_TAG, __VA_ARGS__))
+#define SIGCHAIN_PRINT_INFO(...) ((void)HiLogAdapterPrint(LOG_CORE, LOG_INFO, \
+    SIGCHAIN_LOG_DOMAIN, SIGCHAIN_LOG_TAG, __VA_ARGS__))
+#define SIGCHAIN_PRINT_DEBUG(...) ((void)HiLogAdapterPrint(LOG_CORE, LOG_DEBUG, \
+    SIGCHAIN_LOG_DOMAIN, SIGCHAIN_LOG_TAG, __VA_ARGS__))
 #else
 #define SIGCHAIN_PRINT_ERROR(...)
 #define SIGCHAIN_PRINT_INFO(...)
@@ -71,7 +74,8 @@ void create_pthread_key(void)
   * @brief Get the key of the signal thread.
   * @retval int32_t, the value of the sigchain key.
   */
-static pthread_key_t get_handling_signal_key() {
+static pthread_key_t get_handling_signal_key()
+{
     call_once(&g_flag, create_pthread_key);
     return g_sigchain_key;
 }
@@ -80,7 +84,8 @@ static pthread_key_t get_handling_signal_key() {
   * @brief Get the value of the sigchain key
   * @retval bool, true if set the value of the key，or false.
   */
-static bool get_handling_signal() {
+static bool get_handling_signal()
+{
     void *result = pthread_getspecific(get_handling_signal_key());
     if (result == NULL) {
         return false;
@@ -120,14 +125,14 @@ bool ismarked(int signo)
 static void signal_chain_handler(int signo, siginfo_t* siginfo, void* ucontext_raw)
 {
     SIGCHAIN_PRINT_DEBUG("%{public}s signo: %{public}d", __func__, signo);
-    /* Try to call the special handlers first. */
-    /* If one of them crashes, we'll reenter this handler and pass that crash onto the user handler. */
-    if (!get_handling_signal()){
+    /* First call special handler. */
+    /* If a process crashes, the sigchain'll call the corresponding  handler */
+    if (!get_handling_signal()) {
         for (int i = 0; i < SIGNAL_CHAIN_SPECIAL_ACTION_MAX; i++) {
             if (sig_chains[signo - 1].sca_special_actions[i].sca_sigaction == NULL) {
                 break;
             }
-            /* The native bridge signal handler might not return. */
+            /* The special handler might not return. */
             bool noreturn = (sig_chains[signo - 1].sca_special_actions[i].sca_flags &
                              SIGCHAIN_ALLOW_NORETURN);
             sigset_t previous_mask;
@@ -149,7 +154,7 @@ static void signal_chain_handler(int signo, siginfo_t* siginfo, void* ucontext_r
             set_handling_signal(previous_value);
         }
     }
-
+    /* Then Call the user's signal handler */
     int sa_flags = sig_chains[signo - 1].sig_action.sa_flags;
     ucontext_t* ucontext = (ucontext_t*)(ucontext_raw);
 
@@ -289,7 +294,7 @@ void add_special_signal_handler(int signo, struct signal_chain_action* sa)
         return;
     }
 
-    // Set the special handler.
+    // Add the special hander to the sigchain
     add_special_handler(signo, sa);
     mark_signal_to_sigchain(signo);
 }
@@ -307,7 +312,7 @@ void remove_special_signal_handler(int signo, bool (*fn)(int, siginfo_t*, void*)
         SIGCHAIN_PRINT_ERROR("%{public}s Invalid signal %{public}d", __func__, signo);
         return;
     }
-    // remove the special handler.
+    // remove the special handler from the sigchain.
     rm_special_handler(signo, fn);
 }
 
@@ -351,7 +356,7 @@ bool intercept_sigaction(int signo, const struct sigaction *restrict sa,
 void intercept_sigprocmask(int how, sigset_t *restrict set)
 {
     SIGCHAIN_PRINT_DEBUG("%{public}s how: %{public}d", __func__, how);
-    // Forward directly to the pthread_sigmask When this sigchain is inside a signal handler
+    // Forward directly to the pthread_sigmask When this sigchain is handling a signal.
     if (get_handling_signal()) {
         return;
     }