RelNotes: the first batch of topics graduated to 'master'

[git.git] / wrapper.c

diff --git a/wrapper.c b/wrapper.c
index 4c147d6c48c000bab636fad3edc2fe7da6670948..6ccd0595f43d0ef62bd60a5863804f9a842a4235 100644 (file)
--- a/wrapper.c
+++ b/wrapper.c
@@ -9,6 +9,18 @@ static void do_nothing(size_t size)
 
 static void (*try_to_free_routine)(size_t size) = do_nothing;
 
+static void memory_limit_check(size_t size)
+{
+       static int limit = -1;
+       if (limit == -1) {
+               const char *env = getenv("GIT_ALLOC_LIMIT");
+               limit = env ? atoi(env) * 1024 : 0;
+       }
+       if (limit && size > limit)
+               die("attempting to allocate %"PRIuMAX" over limit %d",
+                   (intmax_t)size, limit);
+}
+
 try_to_free_t set_try_to_free_routine(try_to_free_t routine)
 {
        try_to_free_t old = try_to_free_routine;
@@ -32,7 +44,10 @@ char *xstrdup(const char *str)
 
 void *xmalloc(size_t size)
 {
-       void *ret = malloc(size);
+       void *ret;
+
+       memory_limit_check(size);
+       ret = malloc(size);
        if (!ret && !size)
                ret = malloc(1);
        if (!ret) {
@@ -79,7 +94,10 @@ char *xstrndup(const char *str, size_t len)
 
 void *xrealloc(void *ptr, size_t size)
 {
-       void *ret = realloc(ptr, size);
+       void *ret;
+
+       memory_limit_check(size);
+       ret = realloc(ptr, size);
        if (!ret && !size)
                ret = realloc(ptr, 1);
        if (!ret) {
@@ -95,7 +113,10 @@ void *xrealloc(void *ptr, size_t size)
 
 void *xcalloc(size_t nmemb, size_t size)
 {
-       void *ret = calloc(nmemb, size);
+       void *ret;
+
+       memory_limit_check(size * nmemb);
+       ret = calloc(nmemb, size);
        if (!ret && (!nmemb || !size))
                ret = calloc(1, 1);
        if (!ret) {
@@ -148,8 +169,10 @@ ssize_t read_in_full(int fd, void *buf, size_t count)
 
        while (count > 0) {
                ssize_t loaded = xread(fd, p, count);
-               if (loaded <= 0)
-                       return total ? total : loaded;
+               if (loaded < 0)
+                       return -1;
+               if (loaded == 0)
+                       return total;
                count -= loaded;
                p += loaded;
                total += loaded;
@@ -209,7 +232,7 @@ int xmkstemp(char *template)
                if (!template[0])
                        template = origtemplate;
 
-               nonrelative_template = make_nonrelative_path(template);
+               nonrelative_template = absolute_path(template);
                errno = saved_errno;
                die_errno("Unable to create temporary file '%s'",
                        nonrelative_template);
@@ -344,7 +367,7 @@ int xmkstemp_mode(char *template, int mode)
                if (!template[0])
                        template = origtemplate;
 
-               nonrelative_template = make_nonrelative_path(template);
+               nonrelative_template = absolute_path(template);
                errno = saved_errno;
                die_errno("Unable to create temporary file '%s'",
                        nonrelative_template);