Build.Info/0007-dlopen-use-libname-cache-before-_dl_open-ing-files.patch

From 9ba069f8859789c85b96aaa17876534b0f3b3058 Mon Sep 17 00:00:00 2001
From: Dan Padgett <dpadgett@google.com>
Date: Thu, 24 Mar 2016 16:20:02 -0700
Subject: [PATCH 07/17] dlopen: use libname cache before _dl_open-ing files

---
 .../uclibc-0071-dlopen-use-libname-cache.patch     | 29 ++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 package/uclibc/uclibc-0071-dlopen-use-libname-cache.patch

diff --git a/package/uclibc/uclibc-0071-dlopen-use-libname-cache.patch b/package/uclibc/uclibc-0071-dlopen-use-libname-cache.patch
new file mode 100644
index 0000000..5d295cf
--- /dev/null
+++ b/package/uclibc/uclibc-0071-dlopen-use-libname-cache.patch
@@ -0,0 +1,29 @@
+commit d0b1894a40fff961c44a2e44840882e5e9048abf
+Author: Stephen McGruer <smcgruer@google.com>
+Date:   Thu Oct 29 17:50:44 2015 -0400
+
+    [PATCH] dlopen: use libname cache before _dl_open-ing files
+
+diff --git a/ldso/ldso/dl-elf.c b/ldso/ldso/dl-elf.c
+index 5631905..282a645 100644
+--- a/ldso/ldso/dl-elf.c
++++ b/ldso/ldso/dl-elf.c
+@@ -465,6 +465,18 @@ struct elf_resolve *_dl_load_elf_shared_library(unsigned rflags,
+	DL_LOADADDR_TYPE lib_loadaddr;
+	DL_INIT_LOADADDR_EXTRA_DECLS
+ 
++	/* We can easily pre-check for already loaded absolute-path libraries. */
++	/* TODO(smcgruer): Determine if we can handle non-absolute paths. */
++	if (_dl_strlen(libname) && libname[0] == '/') {
++		for (tpnt = _dl_loaded_modules; tpnt; tpnt = tpnt->next) {
++			if (_dl_strcmp(tpnt->libname, libname) == 0) {
++				/* Already loaded */
++				tpnt->usage_count++;
++				return tpnt;
++			}
++		}
++	}
++
+	libaddr = 0;
+	infile = _dl_open(libname, O_RDONLY, 0);
+	if (infile < 0) {
-- 
2.8.0.rc3.226.g39d4020