diff options
Diffstat (limited to 'meta/recipes-devtools/qemu/qemu/pathlimit.patch')
| -rw-r--r-- | meta/recipes-devtools/qemu/qemu/pathlimit.patch | 137 |
1 files changed, 0 insertions, 137 deletions
diff --git a/meta/recipes-devtools/qemu/qemu/pathlimit.patch b/meta/recipes-devtools/qemu/qemu/pathlimit.patch deleted file mode 100644 index 57ab981c61..0000000000 --- a/meta/recipes-devtools/qemu/qemu/pathlimit.patch +++ /dev/null @@ -1,137 +0,0 @@ -By default qemu builds a complete list of directories within the user -emulation sysroot (-L option). The OE sysroot directory is large and -this is confusing, for example it indexes all pkgdata. In particular this -confuses strace of qemu binaries with tons of irrelevant paths. - -This patch stops the code indexing up front and instead only indexes -things if/as/when it needs to. This drastically reduces the files it -reads and reduces memory usage and cleans up strace. - -It would also avoid the infinite directory traversal bug in [YOCTO #6996] -although the code could still be vulnerable if it parsed those specific -paths. - -RP -2016/3/9 -Upstream-Status: Pending - -Index: qemu-2.5.0/util/path.c -=================================================================== ---- qemu-2.5.0.orig/util/path.c -+++ qemu-2.5.0/util/path.c -@@ -19,6 +19,7 @@ struct pathelem - char *name; - /* Full path name, eg. /usr/gnemul/x86-linux/lib. */ - char *pathname; -+ int populated_entries; - struct pathelem *parent; - /* Children */ - unsigned int num_entries; -@@ -49,6 +50,7 @@ static struct pathelem *new_entry(const - new->name = g_strdup(name); - new->pathname = g_strdup_printf("%s/%s", root, name); - new->num_entries = 0; -+ new->populated_entries = 0; - return new; - } - -@@ -57,15 +59,16 @@ static struct pathelem *new_entry(const - /* Not all systems provide this feature */ - #if defined(DT_DIR) && defined(DT_UNKNOWN) && defined(DT_LNK) - # define dirent_type(dirent) ((dirent)->d_type) --# define is_dir_maybe(type) \ -- ((type) == DT_DIR || (type) == DT_UNKNOWN || (type) == DT_LNK) -+# define is_not_dir(type) \ -+ ((type) != DT_DIR && (type) != DT_UNKNOWN && (type) != DT_LNK) - #else - # define dirent_type(dirent) (1) --# define is_dir_maybe(type) (type) -+# define is_not_dir(type) (0) - #endif - - static struct pathelem *add_dir_maybe(struct pathelem *path) - { -+ unsigned int i; - DIR *dir; - - if ((dir = opendir(path->pathname)) != NULL) { -@@ -78,6 +81,11 @@ static struct pathelem *add_dir_maybe(st - } - closedir(dir); - } -+ -+ for (i = 0; i < path->num_entries; i++) -+ (path->entries[i])->parent = path; -+ -+ path->populated_entries = 1; - return path; - } - -@@ -93,26 +101,16 @@ static struct pathelem *add_entry(struct - e = &root->entries[root->num_entries-1]; - - *e = new_entry(root->pathname, root, name); -- if (is_dir_maybe(type)) { -- *e = add_dir_maybe(*e); -+ if (is_not_dir(type)) { -+ (*e)->populated_entries = 1; - } - - return root; - } - --/* This needs to be done after tree is stabilized (ie. no more reallocs!). */ --static void set_parents(struct pathelem *child, struct pathelem *parent) --{ -- unsigned int i; -- -- child->parent = parent; -- for (i = 0; i < child->num_entries; i++) -- set_parents(child->entries[i], child); --} -- - /* FIXME: Doesn't handle DIR/.. where DIR is not in emulated dir. */ - static const char * --follow_path(const struct pathelem *cursor, const char *name) -+follow_path(struct pathelem *cursor, struct pathelem **source, const char *name) - { - unsigned int i, namelen; - -@@ -123,14 +121,18 @@ follow_path(const struct pathelem *curso - return cursor->pathname; - - if (strneq(name, namelen, "..")) -- return follow_path(cursor->parent, name + namelen); -+ return follow_path(cursor->parent, &cursor->parent, name + namelen); - - if (strneq(name, namelen, ".")) -- return follow_path(cursor, name + namelen); -+ return follow_path(cursor, source, name + namelen); -+ -+ if (!cursor->populated_entries) -+ *source = add_dir_maybe(cursor); -+ cursor = *source; - - for (i = 0; i < cursor->num_entries; i++) - if (strneq(name, namelen, cursor->entries[i]->name)) -- return follow_path(cursor->entries[i], name + namelen); -+ return follow_path(cursor->entries[i], &cursor->entries[i], name + namelen); - - /* Not found */ - return NULL; -@@ -164,8 +166,6 @@ void init_paths(const char *prefix) - g_free(base->name); - g_free(base); - base = NULL; -- } else { -- set_parents(base, base); - } - } - -@@ -177,5 +177,5 @@ const char *path(const char *name) - if (!base || !name || name[0] != '/') - return name; - -- return follow_path(base, name) ?: name; -+ return follow_path(base, &base, name) ?: name; - } |