use write function instead of fprintf in the signal handler

Change-Id: Idb95796bc59841a3ffa325272ffe983fe893d43a

1 files changed, 21 insertions, 18 deletions

diff --git a/NativeLauncher/launcher/dotnet/dotnet_launcher.cc b/NativeLauncher/launcher/dotnet/dotnet_launcher.cc
index d33c0d7..f5a43da 100644
--- a/NativeLauncher/launcher/dotnet/dotnet_launcher.cc
+++ b/NativeLauncher/launcher/dotnet/dotnet_launcher.cc
@@ -127,34 +127,37 @@ struct sigaction sig_abrt_old;
 static bool checkOnSigabrt = false;
 static void onSigabrt(int signum)
 {
-    fprintf(stderr, "onSigabrt is called!!!\n");
-
-    if (checkOnSigabrt) {
-        fprintf(stderr, "SIGABRT is already handled. Go to exit\n");
-        exit(0);
-    }
-
-    if (hasException()) {
-        fprintf(stderr, "Unhandled exception is occured. Ignore coredump creation and terminate normally\n");
-        exit(0);
-    } else {
-        fprintf(stderr, "SIGABRT from native. raise(%d)\n", signum);
-        checkOnSigabrt = true;
+	// ignore return value of write().
+	// this function is called when process go to die
+	// there is no need to handle return value for logging.
+	write(2, "onSigabrt called\n", 17);
+
+	if (checkOnSigabrt) {
+		write(2, "onSigabrt called again. go to exit\n", 35);
+		exit(0);
+	}
+
+	if (hasException()) {
+		write(2, "Unhandled exception is occured. Ignore coredump creation and terminate normally\n", 80);
+		exit(0);
+	} else {
+		write(2, "SIGABRT from native. raise SIGABRT\n", 35);
+		checkOnSigabrt = true;
 		if (sigaction(SIGABRT, &sig_abrt_old, NULL) == 0) {
 			if (raise(signum) < 0) {
-				fprintf(stderr, "Fail to raise SIGABRT\n");
+				write(2, "Fail to raise SIGABRT\n", 22);
 			}
 		} else {
-			fprintf(stderr, "Fail to set original SIGABRT handler\n");
+			write(2, "Fail to set original SIGABRT handler\n", 37);
 		}
-    }
+	}
 }
 
 static void registerSigHandler()
 {
 	sig_abrt_new.sa_handler = onSigabrt;
-	if (sigemptyset(&sig_abrt_new.sa_mask) == 0) {
-		_ERR("Fail to initialize signal set");
+	if (sigemptyset(&sig_abrt_new.sa_mask) != 0) {
+		_ERR("Fail to sigemptyset");
 	}
 
 	if (sigaction(SIGABRT, &sig_abrt_new, &sig_abrt_old) < 0) {