Replace strdup and {c,re,m}alloc with x* variants to check for OOM errors

I'm checking for zero-size allocations and assert()-ing them,
so we can more easily get backtraces and debug problems, but we'll
also allow -DNDEBUG people to live on the edge if they wish.

We do not rely on errno when checking for OOM errors because
some implementations of malloc do not set it, and malloc
is commonly overridden by userspace wrappers.

I've spent some time looking through the source and didn't find any
obvious places where we would explicitly allocate 0 bytes, so we
shouldn't trip any of those assertions.

We also avoid allocating zero bytes because C libraries don't
handle this consistently (some return NULL, some not); and it's
dangerous either way.

git-svn-id: https://svn.musicpd.org/mpd/trunk@4690 09075e82-0dd4-0310-85a5-a0d7c8717e4f

1 files changed, 20 insertions, 20 deletions

diff --git a/src/inputStream_http.c b/src/inputStream_http.c
index 969d2a0ea..f56417ca0 100644
--- a/src/inputStream_http.c
+++ b/src/inputStream_http.c
@@ -172,7 +172,7 @@ static char *base64Dup(char *s)
 {
 	int i;
 	int len = strlen(s);
-	char *ret = calloc(BASE64_LENGTH(len) + 1, 1);
+	char *ret = xcalloc(BASE64_LENGTH(len) + 1, 1);
 	unsigned char *p = (unsigned char *)ret;
 
 	char tbl[64] = {
@@ -216,14 +216,14 @@ static char *authString(char *header, char *user, char *password)
 		return NULL;
 
 	templen = strlen(user) + strlen(password) + 2;
-	temp = malloc(templen);
+	temp = xmalloc(templen);
 	strcpy(temp, user);
 	strcat(temp, ":");
 	strcat(temp, password);
 	temp64 = base64Dup(temp);
 	free(temp);
 
-	ret = malloc(strlen(temp64) + strlen(header) + 3);
+	ret = xmalloc(strlen(temp64) + strlen(header) + 3);
 	strcpy(ret, header);
 	strcat(ret, temp64);
 	strcat(ret, "\r\n");
@@ -240,7 +240,7 @@ static char *authString(char *header, char *user, char *password)
 
 static InputStreamHTTPData *newInputStreamHTTPData(void)
 {
-	InputStreamHTTPData *ret = malloc(sizeof(InputStreamHTTPData));
+	InputStreamHTTPData *ret = xmalloc(sizeof(InputStreamHTTPData));
 
 	if (proxyHost) {
 		ret->proxyAuth = proxyAuthString(proxyUser, proxyPassword);
@@ -256,7 +256,7 @@ static InputStreamHTTPData *newInputStreamHTTPData(void)
 	ret->icyMetaint = 0;
 	ret->prebuffer = 0;
 	ret->icyOffset = 0;
-	ret->buffer = malloc(bufferSize);
+	ret->buffer = xmalloc(bufferSize);
 
 	return ret;
 }
@@ -305,19 +305,19 @@ static int parseUrl(InputStreamHTTPData * data, char *url)
 		char *passwd;
 
 		if (colon && colon < at) {
-			user = malloc(colon - temp + 1);
+			user = xmalloc(colon - temp + 1);
 			memcpy(user, temp, colon - temp);
 			user[colon - temp] = '\0';
 
-			passwd = malloc(at - colon);
+			passwd = xmalloc(at - colon);
 			memcpy(passwd, colon + 1, at - colon - 1);
 			passwd[at - colon - 1] = '\0';
 		} else {
-			user = malloc(at - temp + 1);
+			user = xmalloc(at - temp + 1);
 			memcpy(user, temp, at - temp);
 			user[at - temp] = '\0';
 
-			passwd = strdup("");
+			passwd = xstrdup("");
 		}
 
 		data->httpAuth = httpAuthString(user, passwd);
@@ -345,7 +345,7 @@ static int parseUrl(InputStreamHTTPData * data, char *url)
 	if (len <= 1)
 		return -1;
 
-	data->host = malloc(len);
+	data->host = xmalloc(len);
 	memcpy(data->host, temp, len - 1);
 	data->host[len - 1] = '\0';
 	/* fetch the port */
@@ -353,19 +353,19 @@ static int parseUrl(InputStreamHTTPData * data, char *url)
 		len = strlen(colon) - 1;
 		if (slash)
 			len -= strlen(slash);
-		data->port = malloc(len + 1);
+		data->port = xmalloc(len + 1);
 		memcpy(data->port, colon + 1, len);
 		data->port[len] = '\0';
 		DEBUG(__FILE__ ": Port: %s\n", data->port);
 	} else {
-		data->port = strdup("80");
+		data->port = xstrdup("80");
 	}
 
 	/* fetch the path */
 	if (proxyHost)
-		data->path = strdup(url);
+		data->path = xstrdup(url);
 	else
-		data->path = strdup(slash ? slash : "/");
+		data->path = xstrdup(slash ? slash : "/");
 
 	return 0;
 }
@@ -591,7 +591,7 @@ static int getHTTPHello(InputStream * inStream)
 			       && *(cur + curlen) != '\r') {
 				curlen++;
 			}
-			url = malloc(curlen + 1);
+			url = xmalloc(curlen + 1);
 			memcpy(url, cur, curlen);
 			url[curlen] = '\0';
 			ret = parseUrl(data, url);
@@ -634,7 +634,7 @@ static int getHTTPHello(InputStream * inStream)
 				free(inStream->metaName);
 			while (*(incr + cur) == ' ')
 				incr++;
-			inStream->metaName = strdup(cur + incr);
+			inStream->metaName = xstrdup(cur + incr);
 			*temp = '\r';
 			DEBUG("inputStream_http: metaName: %s\n",
 			      inStream->metaName);
@@ -648,7 +648,7 @@ static int getHTTPHello(InputStream * inStream)
 				free(inStream->metaName);
 			while (*(incr + cur) == ' ')
 				incr++;
-			inStream->metaName = strdup(cur + incr);
+			inStream->metaName = xstrdup(cur + incr);
 			*temp = '\r';
 			DEBUG("inputStream_http: metaName: %s\n",
 			      inStream->metaName);
@@ -662,7 +662,7 @@ static int getHTTPHello(InputStream * inStream)
 				free(inStream->mime);
 			while (*(incr + cur) == ' ')
 				incr++;
-			inStream->mime = strdup(cur + incr);
+			inStream->mime = xstrdup(cur + incr);
 			*temp = '\r';
 		}
 
@@ -735,7 +735,7 @@ static void parseIcyMetadata(InputStream * inStream, char *metadata, int size)
 {
 	char *r;
 	char *s;
-	char *temp = malloc(size + 1);
+	char *temp = xmalloc(size + 1);
 	memcpy(temp, metadata, size);
 	temp[size] = '\0';
 	s = strtok_r(temp, ";", &r);
@@ -749,7 +749,7 @@ static void parseIcyMetadata(InputStream * inStream, char *metadata, int size)
 			if (s[strlen(s) - 1] == '\'') {
 				s[strlen(s) - 1] = '\0';
 			}
-			inStream->metaTitle = strdup(s + cur);
+			inStream->metaTitle = xstrdup(s + cur);
 			DEBUG("inputStream_http: metaTitle: %s\n",
 			      inStream->metaTitle);
 		}