Enable __cxa_atexit && __cxa_finalize for linker

 This allows adding destructors to classes used
 for global variables.

Change-Id: I5e1cd63fe3bf8f66de88cc4f7437cafb350f49b5

4 files changed, 23 insertions, 11 deletions

diff --git a/linker/Android.mk b/linker/Android.mk
index 5853c90..4298032 100644
--- a/linker/Android.mk
+++ b/linker/Android.mk
@@ -8,6 +8,7 @@ LOCAL_SRC_FILES:= \
     linker.cpp \
     linker_allocator.cpp \
     linker_environ.cpp \
+    linker_libc_support.c \
     linker_phdr.cpp \
     rt.cpp \
 
diff --git a/linker/linked_list.h b/linker/linked_list.h
index 8096e62..e51eb9c 100644
--- a/linker/linked_list.h
+++ b/linker/linked_list.h
@@ -32,6 +32,9 @@ template<typename T, typename Allocator>
 class LinkedList {
  public:
   LinkedList() : head_(nullptr), tail_(nullptr) {}
+  ~LinkedList() {
+    clear();
+  }
 
   void push_front(T* const element) {
     LinkedListEntry<T>* new_entry = Allocator::alloc();
diff --git a/linker/linker.cpp b/linker/linker.cpp
index 6a55571..aaa653f 100644
--- a/linker/linker.cpp
+++ b/linker/linker.cpp
@@ -2167,16 +2167,6 @@ static void init_linker_info_for_gdb(ElfW(Addr) linker_base) {
  * and other non-local data at this point.
  */
 static ElfW(Addr) __linker_init_post_relocation(KernelArgumentBlock& args, ElfW(Addr) linker_base) {
-    /* NOTE: we store the args pointer on a special location
-     *       of the temporary TLS area in order to pass it to
-     *       the C Library's runtime initializer.
-     *
-     *       The initializer must clear the slot and reset the TLS
-     *       to point to a different location to ensure that no other
-     *       shared library constructor can access it.
-     */
-  __libc_init_tls(args);
-
 #if TIMING
     struct timeval t0, t1;
     gettimeofday(&t0, 0);
@@ -2403,6 +2393,8 @@ extern "C" ElfW(Addr) __linker_init(void* raw_args) {
     _exit(EXIT_FAILURE);
   }
 
+  __libc_init_tls(args);
+
   // Initialize the linker's own global variables
   linker_so.CallConstructors();
 
@@ -2412,7 +2404,6 @@ extern "C" ElfW(Addr) __linker_init(void* raw_args) {
   solist = get_libdl_info();
   sonext = get_libdl_info();
 
-
   // We have successfully fixed our own relocations. It's safe to run
   // the main part of the linker now.
   args.abort_message_ptr = &g_abort_message;
diff --git a/linker/linker_libc_support.c b/linker/linker_libc_support.c
new file mode 100644
index 0000000..17db6d4
--- /dev/null
+++ b/linker/linker_libc_support.c
@@ -0,0 +1,17 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "../libc/arch-common/bionic/__dso_handle.h"