Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Store pathnames of shared objects not found in search paths in cache

Browse Source 
and utilize it. This greatly reduces the number of calls to open(2) and
malloc(3) for programs like mozilla that depend on many shared objects
while it doesn't affect performance of small programs.
This commit is contained in:
junyoung 2002-10-01 14:16:53 +00:00
parent 11a0f4d42d
commit a189aa3eba
1 changed files with 25 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
libexec/ld.elf_so/search.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: search.c,v 1.13 2002/09/24 12:52:20 mycroft Exp $ */
/* $NetBSD: search.c,v 1.14 2002/10/01 14:16:53 junyoung Exp $ */
/*
* Copyright 1996 Matt Thomas <matt@3am-software.com>
@ -55,6 +55,8 @@
/*
* Data declarations.
*/
Search_Path *_rtld_invalid_paths;
static Obj_Entry *_rtld_search_library_path __P((const char *, size_t,
const char *, size_t, int));
@ -67,17 +69,36 @@ _rtld_search_library_path(name, namelen, dir, dirlen, mode)
int mode;
{
char *pathname;
size_t pathnamelen;
Obj_Entry *obj;
Search_Path *sp;
pathname = xmalloc(dirlen + 1 + namelen + 1);
pathnamelen = dirlen + 1 + namelen;
for (sp = _rtld_invalid_paths; sp != NULL; sp = sp->sp_next) {
if (sp->sp_pathlen == pathnamelen &&
!strncmp(name, sp->sp_path + dirlen + 1, namelen) &&
!strncmp(dir, sp->sp_path, dirlen)) {
return NULL;
}
}
pathname = xmalloc(pathnamelen + 1);
(void)strncpy(pathname, dir, dirlen);
pathname[dirlen] = '/';
strcpy(pathname + dirlen + 1, name);
dbg((" Trying \"%s\"", pathname));
obj = _rtld_load_object(pathname, mode);
if (obj == NULL)
free(pathname);
if (obj == NULL) {
Search_Path *path;
path = NEW(Search_Path);
path->sp_pathlen = pathnamelen;
path->sp_path = pathname;
path->sp_next = _rtld_invalid_paths;
_rtld_invalid_paths = path;
}
return obj;
}