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pkg: do not break cycles across dependency lists

master
Ariadne Conill 2022-08-08 09:56:28 +00:00
parent 4e449bd45f
commit 7e9aa7e1fc
2 changed files with 25 additions and 5 deletions
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1
libpkgconf/libpkgconf.h
View File

@ -266,6 +266,7 @@ PKGCONF_API void pkgconf_cross_personality_deinit(pkgconf_cross_personality_t *p
#define PKGCONF_PKG_PKGF_PKGCONF1_SYSROOT_RULES 0x10000
#define PKGCONF_PKG_DEPF_INTERNAL 0x1
#define PKGCONF_PKG_DEPF_PRIVATE 0x2
#define PKGCONF_PKG_ERRF_OK 0x0
#define PKGCONF_PKG_ERRF_PACKAGE_NOT_FOUND 0x1

21
libpkgconf/pkg.c
View File

@ -154,6 +154,17 @@ pkgconf_pkg_parser_internal_dependency_func(pkgconf_client_t *client, pkgconf_pk
pkgconf_dependency_parse(client, pkg, dest, value, PKGCONF_PKG_DEPF_INTERNAL);
}
/* a variant of pkgconf_pkg_parser_dependency_func which colors the dependency node as an "internal" dependency. */
static void
pkgconf_pkg_parser_private_dependency_func(pkgconf_client_t *client, pkgconf_pkg_t *pkg, const char *keyword, const size_t lineno, const ptrdiff_t offset, const char *value)
{
(void) keyword;
(void) lineno;
pkgconf_list_t *dest = (pkgconf_list_t *)((char *) pkg + offset);
pkgconf_dependency_parse(client, pkg, dest, value, PKGCONF_PKG_DEPF_PRIVATE);
}
/* keep this in alphabetical order */
static const pkgconf_pkg_parser_keyword_pair_t pkgconf_pkg_parser_keyword_funcs[] = {
{"CFLAGS", pkgconf_pkg_parser_fragment_func, offsetof(pkgconf_pkg_t, cflags)},
@ -167,7 +178,7 @@ static const pkgconf_pkg_parser_keyword_pair_t pkgconf_pkg_parser_keyword_funcs[
{"Provides", pkgconf_pkg_parser_dependency_func, offsetof(pkgconf_pkg_t, provides)},
{"Requires", pkgconf_pkg_parser_dependency_func, offsetof(pkgconf_pkg_t, required)},
{"Requires.internal", pkgconf_pkg_parser_internal_dependency_func, offsetof(pkgconf_pkg_t, requires_private)},
{"Requires.private", pkgconf_pkg_parser_dependency_func, offsetof(pkgconf_pkg_t, requires_private)},
{"Requires.private", pkgconf_pkg_parser_private_dependency_func, offsetof(pkgconf_pkg_t, requires_private)},
{"Version", pkgconf_pkg_parser_version_func, offsetof(pkgconf_pkg_t, version)},
};
@ -1478,12 +1489,20 @@ pkgconf_pkg_walk_list(pkgconf_client_t *client,
* the list, so that we dont create a situation where
* memory is leaked due to circular ownership.
* i.e: A owns B owns A
*
* TODO(ariadne): Breaking circular references between Requires and Requires.private
* lists causes problems. Find a way to refactor the Requires.private list out.
*/
if (!(depnode->flags & PKGCONF_PKG_DEPF_PRIVATE) &&
!(parent->flags & PKGCONF_PKG_PROPF_VIRTUAL))
{
pkgconf_warn(client, "%s: breaking circular reference (%s -> %s -> %s)\n",
parent->id, parent->id, pkgdep->id, parent->id);
pkgconf_node_delete(node, deplist);
pkgconf_dependency_unref(client, depnode);
}
goto next;
}