diff --git a/toolchain/libc-test/include/getfiles.cpp b/toolchain/libc-test/include/getfiles.cpp
index 3a520e3acb7e6163a411d3b0228b66db854f8211..70d62f513b420433459604824ca356fed34159b8 100644
--- a/toolchain/libc-test/include/getfiles.cpp
+++ b/toolchain/libc-test/include/getfiles.cpp
@@ -20,11 +20,11 @@
 #include "gettestfiles.cpp"
 
 #include "runtest.h"
-
+namespace OHOS{
 using namespace std;
 
 static vector<std::string> filenames;
-vector<std::string> GetFileNames(std::string path)
+std::vector<std::string> runtest::GetFileNames(std::string path)
 {
     vector<string> tempName;
     GetTestNames(path, tempName);
@@ -37,4 +37,5 @@ vector<std::string> GetFileNames(std::string path)
         filenames.push_back(tempName[i]);
     }
     return filenames;
-}
\ No newline at end of file
+}
+} //namespace OHOS
\ No newline at end of file
diff --git a/toolchain/libc-test/include/runtest.h b/toolchain/libc-test/include/runtest.h
index ddf282da053b686f8213d769523f23d4559c565e..46c9f6144e29eb0cc9d3be143c86d7e980bf6032 100644
--- a/toolchain/libc-test/include/runtest.h
+++ b/toolchain/libc-test/include/runtest.h
@@ -18,8 +18,13 @@
 #include <iostream>
 #include <string>
 #include <vector>
+namespace OHOS {
 
-int t_setrlim(int r, long lim);
-std::vector<std::string> GetFileNames(std::string path);
-
+class runtest
+{
+public:
+    static int t_setrlim(int r, long lim);
+    static std::vector<std::string> GetFileNames(std::string path);
+};
+} //namespace OHOS
 #endif  // TOOLCHAIN_LIBC_TEST_INCLUDE_RUNTEST_H_
diff --git a/toolchain/libc-test/include/setrlim.cpp b/toolchain/libc-test/include/setrlim.cpp
index fbd57e05df2f9f72a454e6313862de4eacee0ff1..d729ff4d23f91dee80501da4ef461c8978cde4d5 100644
--- a/toolchain/libc-test/include/setrlim.cpp
+++ b/toolchain/libc-test/include/setrlim.cpp
@@ -18,8 +18,8 @@
 #include <sys/resource.h>
 
 #include "runtest.h"
-
-int t_setrlim(int r, long lim)
+namespace OHOS{
+int runtest::t_setrlim(int r, long lim)
 {
     struct rlimit rl;
 
@@ -40,4 +40,5 @@ int t_setrlim(int r, long lim)
         return -1;
     }
     return 0;
-}
\ No newline at end of file
+}
+} //namespace OHOS
\ No newline at end of file
diff --git a/toolchain/libc-test/src/toolchaintest.cpp b/toolchain/libc-test/src/toolchaintest.cpp
index 0a9ac13810cc2801c4b5e752257acf84ddcdf03c..9ff4c9d917b96af9f0ac54c4f32c02f4ee60e8bc 100644
--- a/toolchain/libc-test/src/toolchaintest.cpp
+++ b/toolchain/libc-test/src/toolchaintest.cpp
@@ -37,7 +37,7 @@ namespace OHOS {
 class toolchaintest : public ::testing::TestWithParam<string> {};
 
 static string filepath = "/data/local/tmp/libc-test/src";
-static vector<string> temp =  GetFileNames(filepath);
+static vector<std::string> temp = runtest::GetFileNames(filepath);
 volatile int t_status = 0;
 
 static void handler(int s)
@@ -50,7 +50,7 @@ static int start(char *wrap, const char *argvs)
 
     pid = fork();
     if (pid == 0) {
-        t_setrlim(RLIMIT_STACK, space_size);
+        runtest::t_setrlim(RLIMIT_STACK, space_size);
         int exe = execl(argvs, "strptime", nullptr);
         printf("exe:%d %s exec failed: %s\n", exe, argvs, strerror(errno));
         exit(1);
@@ -64,11 +64,13 @@ static int runTests(const char *argvs)
     int timeoutsec = 5, timeout = 0;
     int status, pid;
     sigset_t set;
+    void (*retfunc)(int);
 
     sigemptyset(&set);
     sigaddset(&set, SIGCHLD);
     sigprocmask(SIG_BLOCK, &set, nullptr);
-    if (signal(SIGCHLD, handler) == SIG_ERR) {
+    retfunc = signal(SIGCHLD, handler);
+    if (retfunc == SIG_ERR) {
         printf("signal triggering failed:%s\n", strerror(errno));
     }
     pid = start(wrap, argvs);