diff --git a/src/elf_hugepage.c b/src/elf_hugepage.c
index ae4a21d4e7ad0140e1f857cc270e62902397124d..bc61d2b2667ae0e7806b08226acb7b55c046017c 100644
--- a/src/elf_hugepage.c
+++ b/src/elf_hugepage.c
@@ -62,20 +62,27 @@ error_elf:
 	return ret;
 }
 
-static int _elf_set_flags(char *path, unsigned int flags)
+static int _elf_write_read_flags(char *path, unsigned int *flags, bool set)
 {
+	bool is_readonly = !*flags;
 	elf_file_t *ef = malloc(sizeof(elf_file_t));
 	if (ef == NULL) {
 		SI_LOG_ERR("malloc fail\n");
-		return -1;
+		return -12;
 	}
 
-	int ret = elf_read_file(path, ef, false);
+	int ret = elf_read_file(path, ef, is_readonly);
 	if (ret != 0) {
-		return -1;
+		return ret;
 	}
 
-	ef->hdr->e_flags |= flags;
+	if (!is_readonly) {
+		if (set)
+			ef->hdr->e_flags |= *flags;
+		else
+			ef->hdr->e_flags &= (0xffffffffU ^ *flags);
+	}
+	*flags = ef->hdr->e_flags;
 
 	elf_close_file(ef);
 	free(ef);
@@ -83,25 +90,33 @@ static int _elf_set_flags(char *path, unsigned int flags)
 	return 0;
 }
 
-static int _elf_unset_flags(char *path, unsigned int flags)
+static int _elf_set_flags(char *path, unsigned int flags)
 {
-	elf_file_t *ef = malloc(sizeof(elf_file_t));
-	if (ef == NULL) {
-		SI_LOG_ERR("malloc fail\n");
-		return -1;
-	}
+	if (!flags)
+		return -22;
+	return _elf_write_read_flags(path, &flags, true);
+}
 
-	int ret = elf_read_file(path, ef, false);
-	if (ret != 0) {
-		return -1;
-	}
+static int _elf_unset_flags(char *path, unsigned int flags)
+{
+	if (!flags)
+		return -22;
+	return _elf_write_read_flags(path, &flags, false);
+}
 
-	ef->hdr->e_flags &= (0xffffffffU ^ flags);
+/*
+ * return 1 means flags are set, 0 means flags are *not all* set;
+ *          negative means error.
+*/
+static int _elf_test_flags(char *path, unsigned int flags)
+{
+	unsigned int all_flags = 0;
+	int ret;
+	ret = _elf_write_read_flags(path, &all_flags, 0);
+	if (ret)
+		return ret;
 
-	elf_close_file(ef);
-	free(ef);
-	ef = NULL;
-	return 0;
+	return ((all_flags & flags) == flags);
 }
 
 int elf_set_rto(char *path, bool state)
@@ -112,6 +127,19 @@ int elf_set_rto(char *path, bool state)
 	return _elf_unset_flags(path, OS_SPECIFIC_FLAG_RTO);
 }
 
+int elf_get_rto(char *path)
+{
+	int ret = _elf_test_flags(path, OS_SPECIFIC_FLAG_RTO);
+	if (ret < 0)
+		return ret;
+	
+	if (ret)
+		SI_LOG_INFO("%s FLAG RTO is set\n", path);
+	else
+		SI_LOG_INFO("%s FLAG RTO is not set\n", path);
+	return 0;
+}
+
 void elf_set_hugepage(elf_link_t *elf_link)
 {
 	int i, exec_only = 1;
diff --git a/src/elf_hugepage.h b/src/elf_hugepage.h
index 93ed00c9f2cce6f610ba1b375f37496b9d457b3f..54651f49e40402070e5ff6424e4eec7c4af865ca 100644
--- a/src/elf_hugepage.h
+++ b/src/elf_hugepage.h
@@ -19,6 +19,7 @@
 void elf_set_hugepage(elf_link_t *elf_link);
 int elf_set_symbolic_link(char *path, bool state);
 int elf_set_rto(char *path, bool state);
+int elf_get_rto(char *path);
 
 #define RTO_LOAD_FLAG_LOAD		0x1
 #define RTO_LOAD_FLAG_PRELOAD		0x2
diff --git a/src/elf_read_elf.c b/src/elf_read_elf.c
index 3a1796b14a24feef128d303f4c23d6cdb2dabb7f..612400811e860f6c28e52b37d401c451177f449f 100644
--- a/src/elf_read_elf.c
+++ b/src/elf_read_elf.c
@@ -676,8 +676,8 @@ int elf_read_file(char *file_name, elf_file_t *ef, bool is_readonly)
 
 	// The build_id may not exist
 	if (!ef->build_id) {
-		SI_LOG_ERR("check build_id fail, build_id in %s is NULL.\n", file_name);
-		return -1;
+		SI_LOG_INFO("check build_id fail, build_id in %s is NULL.\n", file_name);
+		// return -1;
 	}
 
 	// check elf arch
diff --git a/src/main.c b/src/main.c
index 3927b3ce8ab453d9e29b85a28067722465ac87c9..fcd79da900c9eb1e344db63c11c92e395b842aaa 100644
--- a/src/main.c
+++ b/src/main.c
@@ -45,17 +45,19 @@ int main(int argc, char *argv[])
 	}
 
 	static struct option long_options[] = {
-	    {"output", required_argument, NULL, 'o'},
-	    {"debug", no_argument, NULL, 'd'},
-	    {"set", required_argument, NULL, 's'},
-	    {"unset", required_argument, NULL, 'u'},
-	    {"set-rto", required_argument, NULL, '1'},
-	    {"unset-rto", required_argument, NULL, '0'},
-	    {"hook", no_argument, NULL, 'h'},
-	    {ELF_LINK_STATIC_S, no_argument, NULL, 'S'},
-	    {ELF_LINK_STATIC_NOLIBC_S, no_argument, NULL, 'N'},
-	    {ELF_LINK_STATIC_NOLD_S, no_argument, NULL, 'I'},
-	    {NULL, 0, NULL, 0}
+		{"output", 			required_argument, 	NULL, 	'o'},
+		{"debug", 			no_argument, 		NULL, 	'd'},
+		{"set", 			required_argument, 	NULL, 	's'},
+		{"unset", 			required_argument, 	NULL, 	'u'},
+		{"get", 			required_argument, 	NULL, 	'g'},
+		{"set-rto", 			required_argument, 	NULL, 	'1'},
+		{"unset-rto", 			required_argument, 	NULL, 	'0'},
+		{"get-rto", 			required_argument, 	NULL, 	'2'},
+		{"hook", 			no_argument, 		NULL, 	'h'},
+		{ELF_LINK_STATIC_S, 		no_argument, 		NULL, 	'S'},
+		{ELF_LINK_STATIC_NOLIBC_S, 	no_argument, 		NULL, 	'N'},
+		{ELF_LINK_STATIC_NOLD_S, 	no_argument, 		NULL, 	'I'},
+		{NULL, 				0, 			NULL, 	0}
 	};
 
 	int option_index = 0;
@@ -82,6 +84,9 @@ int main(int argc, char *argv[])
 				return -1;
 			}
 			return elf_set_symbolic_link(tmp, false);
+		case 'g':
+			SI_LOG_ERR("not supported now, fix me\n");
+			return -1;
 		case '1':
 			str_ret = realpath(optarg, tmp);
 			if (!str_ret) {
@@ -96,6 +101,13 @@ int main(int argc, char *argv[])
 				return -1;
 			}
 			return elf_set_rto(tmp, false);
+		case '2':
+			str_ret = realpath(optarg, tmp);
+			if (!str_ret) {
+				SI_LOG_ERR("get realpath fail: %s\n", optarg);
+				return -1;
+			}
+			return elf_get_rto(tmp);
 		case 'h':
 			elf_link->hook_func = true;
 			SI_LOG_INFO("hook func\n");