PR gold/10708

	* copy-relocs.cc (Copy_relocs::emit_copy_reloc): Hold a lock on the
	object when reading from the file.
	* gold.cc (queue_middle_tasks): Hold a lock on the object when doing
	second layout pass.
	* icf.cc (preprocess_for_unique_sections): Hold a lock on the object
	when reading section contents.
	(get_section_contents): Likewise.
	(icf::find_identical_sections): Likewise.
	* mapfile.cc (Mapfile::print_discarded_sections): Hold a lock on the
	object when reading from the file.
	* plugin.cc (Plugin_manager::layout_deferred_objects): Hold a lock on
	the object when doing deferred section layout.

1 files changed, 8 insertions, 1 deletions

diff --git a/gold/plugin.cc b/gold/plugin.cc
index 7dd1fa3..a3569c9 100644
--- a/gold/plugin.cc
+++ b/gold/plugin.cc
@@ -361,7 +361,14 @@ Plugin_manager::layout_deferred_objects()
   for (obj = this->deferred_layout_objects_.begin();
        obj != this->deferred_layout_objects_.end();
        ++obj)
-    (*obj)->layout_deferred_sections(this->layout_);
+    {
+      // Lock the object so we can read from it.  This is only called
+      // single-threaded from queue_middle_tasks, so it is OK to lock.
+      // Unfortunately we have no way to pass in a Task token.
+      const Task* dummy_task = reinterpret_cast<const Task*>(-1);
+      Task_lock_obj<Object> tl(dummy_task, *obj);
+      (*obj)->layout_deferred_sections(this->layout_);
+    }
 }
 
 // Call the cleanup handlers.