Change in coreboot[master]: util/sconfig: Add helper function for allocating memory

[Furquan Shaikh (Code Review)]

Furquan Shaikh has uploaded this change for review. ( https://review.coreboot.org/26738

Change subject: util/sconfig: Add helper function for allocating memory
......................................................................

util/sconfig: Add helper function for allocating memory

Add a helper function s_alloc (sconfig alloc) that allocates memory
using calloc to get 0 initialized memory and checks to ensure it is
not NULL.

BUG=b:80081934

Change-Id: I56a70cf4865c50ed238226ace86e867bb1ec53db
Signed-off-by: Furquan Shaikh 
---
M util/sconfig/main.c
1 file changed, 23 insertions(+), 22 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/38/26738/1

diff --git a/util/sconfig/main.c b/util/sconfig/main.c
index 0659ecd..8287cce 100644
--- a/util/sconfig/main.c
+++ b/util/sconfig/main.c
@@ -59,14 +59,21 @@
    struct queue *prev;
 } *q;

-struct queue *new_entry(void *data)
-{
-	struct queue *e = malloc(sizeof(*e));
+#define S_ALLOC(_s)	s_alloc(__func__, _s)

-	if (!e) {
-		fprintf(stderr, "%s: malloc failure!\n", __func__);
+static void *s_alloc(const char *f, size_t s)
+{
+	void *data = calloc(1, s);
+	if (!data) {
+		fprintf(stderr, "%s: Failed to alloc mem!\n", f, s);
    	exit(1);
    }
+	return data;
+}
+
+struct queue *new_entry(void *data)
+{
+	struct queue *e = S_ALLOC(sizeof(*e));

e->data = data;
    e->next = e->prev = e;
@@ -108,8 +115,8 @@

static struct device *new_dev(struct device *parent)
 {
-	struct device *dev = malloc(sizeof(struct device));
-	memset(dev, 0, sizeof(struct device));
+	struct device *dev = S_ALLOC(sizeof(struct device));
+
    dev->id = ++count;
    dev->parent = parent;
    dev->subsystem_vendor = -1;
@@ -200,13 +207,7 @@

struct chip *new_chip(char *path)
 {
-	struct chip *new_chip = malloc(sizeof(*new_chip));
-	if (!new_chip) {
-		fprintf(stderr, "%s: malloc failure!\n", __func__);
-		exit(1);
-	}
-
-	memset(new_chip, 0, sizeof(*new_chip));
+	struct chip *new_chip = S_ALLOC(sizeof(*new_chip));

new_chip->id = ++count;
    new_chip->chiph_exists = 1;
@@ -214,7 +215,7 @@
    new_chip->name_underscore = translate_name(new_chip->name, UNSLASH);

struct stat st;
-	char *chip_h = malloc(strlen(path) + 18);
+	char *chip_h = S_ALLOC(strlen(path) + 18);
    sprintf(chip_h, "src/%s", path);
    if ((stat(chip_h, &st) == -1) && (errno == ENOENT)) {
    	/* root_complex gets away without a separate directory, but
@@ -254,7 +255,7 @@
    	new_d->path_b = strtol(tmp, NULL, 16);
    }

-	char *name = malloc(10);
+	char *name = S_ALLOC(10);
    sprintf(name, "_dev%d", new_d->id);
    new_d->name = name;

@@ -350,8 +351,8 @@

void add_resource(struct device *dev, int type, int index, int base)
 {
-	struct resource *r = malloc(sizeof(struct resource));
-	memset(r, 0, sizeof(struct resource));
+	struct resource *r = S_ALLOC(sizeof(struct resource));
+
    r->type = type;
    r->index = index;
    r->base = base;
@@ -368,8 +369,8 @@

void add_register(struct chip *chip, char *name, char *val)
 {
-	struct reg *r = malloc(sizeof(struct reg));
-	memset(r, 0, sizeof(struct reg));
+	struct reg *r = S_ALLOC(sizeof(struct reg));
+
    r->key = name;
    r->value = val;
    if (chip->reg) {
@@ -610,8 +611,8 @@

if (!include_exists) {
    	struct header *tmp = h->next;
-		h->next = malloc(sizeof(struct header));
-		memset(h->next, 0, sizeof(struct header));
+		h->next = S_ALLOC(sizeof(struct header));
+
    	h->next->chiph_exists = chip->chiph_exists;
    	h->next->name = chip->name;
    	h->next->next = tmp;