diff options
Diffstat (limited to 'builtin')
| -rw-r--r-- | builtin/grep.c | 38 |
1 files changed, 22 insertions, 16 deletions
diff --git a/builtin/grep.c b/builtin/grep.c index d3ed05c1da..ac3d86c2e5 100644 --- a/builtin/grep.c +++ b/builtin/grep.c @@ -401,25 +401,23 @@ static int grep_submodule(struct grep_opt *opt, struct grep_opt subopt; int hit; - /* - * NEEDSWORK: submodules functions need to be protected because they - * call config_from_gitmodules(): the latter contains in its call stack - * many thread-unsafe operations that are racy with object reading, such - * as parse_object() and is_promisor_object(). - */ - obj_read_lock(); sub = submodule_from_path(superproject, &null_oid, path); - if (!is_submodule_active(superproject, path)) { - obj_read_unlock(); + if (!is_submodule_active(superproject, path)) return 0; - } - if (repo_submodule_init(&subrepo, superproject, sub)) { - obj_read_unlock(); + if (repo_submodule_init(&subrepo, superproject, sub)) return 0; - } + /* + * NEEDSWORK: repo_read_gitmodules() might call + * add_to_alternates_memory() via config_from_gitmodules(). This + * operation causes a race condition with concurrent object readings + * performed by the worker threads. That's why we need obj_read_lock() + * here. It should be removed once it's no longer necessary to add the + * subrepo's odbs to the in-memory alternates list. + */ + obj_read_lock(); repo_read_gitmodules(&subrepo, 0); /* @@ -1052,6 +1050,9 @@ int cmd_grep(int argc, const char **argv, const char *prefix) pathspec.recursive = 1; pathspec.recurse_submodules = !!recurse_submodules; + if (recurse_submodules && (!use_index || untracked)) + die(_("option not supported with --recurse-submodules")); + if (list.nr || cached || show_in_pager) { if (num_threads > 1) warning(_("invalid option combination, ignoring --threads")); @@ -1071,6 +1072,14 @@ int cmd_grep(int argc, const char **argv, const char *prefix) && (opt.pre_context || opt.post_context || opt.file_break || opt.funcbody)) skip_first_line = 1; + + /* + * Pre-read gitmodules (if not read already) to prevent racy + * lazy reading in worker threads. + */ + if (recurse_submodules) + repo_read_gitmodules(the_repository, 1); + start_threads(&opt); } else { /* @@ -1105,9 +1114,6 @@ int cmd_grep(int argc, const char **argv, const char *prefix) } } - if (recurse_submodules && (!use_index || untracked)) - die(_("option not supported with --recurse-submodules")); - if (!show_in_pager && !opt.status_only) setup_pager(); |