diff options
Diffstat (limited to 'grep.c')
| -rw-r--r-- | grep.c | 32 |
1 files changed, 18 insertions, 14 deletions
@@ -1540,11 +1540,6 @@ static inline void grep_attr_unlock(void) pthread_mutex_unlock(&grep_attr_mutex); } -/* - * Same as git_attr_mutex, but protecting the thread-unsafe object db access. - */ -pthread_mutex_t grep_read_mutex; - static int match_funcname(struct grep_opt *opt, struct grep_source *gs, char *bol, char *eol) { xdemitconf_t *xecfg = opt->priv; @@ -1741,13 +1736,20 @@ static int fill_textconv_grep(struct repository *r, } /* - * fill_textconv is not remotely thread-safe; it may load objects - * behind the scenes, and it modifies the global diff tempfile - * structure. + * fill_textconv is not remotely thread-safe; it modifies the global + * diff tempfile structure, writes to the_repo's odb and might + * internally call thread-unsafe functions such as the + * prepare_packed_git() lazy-initializator. Because of the last two, we + * must ensure mutual exclusion between this call and the object reading + * API, thus we use obj_read_lock() here. + * + * TODO: allowing text conversion to run in parallel with object + * reading operations might increase performance in the multithreaded + * non-worktreee git-grep with --textconv. */ - grep_read_lock(); + obj_read_lock(); size = fill_textconv(r, driver, df, &buf); - grep_read_unlock(); + obj_read_unlock(); free_filespec(df); /* @@ -1813,10 +1815,15 @@ static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int colle grep_source_load_driver(gs, opt->repo->index); /* * We might set up the shared textconv cache data here, which - * is not thread-safe. + * is not thread-safe. Also, get_oid_with_context() and + * parse_object() might be internally called. As they are not + * currenty thread-safe and might be racy with object reading, + * obj_read_lock() must be called. */ grep_attr_lock(); + obj_read_lock(); textconv = userdiff_get_textconv(opt->repo, gs->driver); + obj_read_unlock(); grep_attr_unlock(); } @@ -2116,10 +2123,7 @@ static int grep_source_load_oid(struct grep_source *gs) { enum object_type type; - grep_read_lock(); gs->buf = read_object_file(gs->identifier, &type, &gs->size); - grep_read_unlock(); - if (!gs->buf) return error(_("'%s': unable to read %s"), gs->name, |