Linux: Upgrade to gold 2.23.2. Include a patch to fix a race in the ehframe code.

ehframe.patch

Index: ehframe.patch
===================================================================
--- ehframe.patch	(revision 0)
+++ ehframe.patch	(revision 0)
@@ -0,0 +1,49 @@
+diff --git a/gold/ehframe.cc b/gold/ehframe.cc
+index 08a9ec6..be262bf 100644
+--- a/gold/ehframe.cc
++++ b/gold/ehframe.cc
+@@ -84,7 +84,8 @@ Eh_frame_hdr::Eh_frame_hdr(Output_section* eh_frame_section,
+     eh_frame_section_(eh_frame_section),
+     eh_frame_data_(eh_frame_data),
+     fde_offsets_(),
+-    any_unrecognized_eh_frame_sections_(false)
++    any_unrecognized_eh_frame_sections_(false),
++    lock_(NULL)
+ {
+ }
+ 
+@@ -102,6 +103,9 @@ Eh_frame_hdr::set_final_data_size()
+       this->fde_offsets_.reserve(fde_count);
+     }
+   this->set_data_size(data_size);
++  // We need a lock for updating the fde_offsets_ vector while writing
++  // the FDEs.
++  this->lock_ = new Lock();
+ }
+ 
+ // Write the data to the file.
+diff --git a/gold/ehframe.h b/gold/ehframe.h
+index 8aab8b8..d5ac668 100644
+--- a/gold/ehframe.h
++++ b/gold/ehframe.h
+@@ -60,7 +60,10 @@ class Eh_frame_hdr : public Output_section_data
+   record_fde(section_offset_type fde_offset, unsigned char fde_encoding)
+   {
+     if (!this->any_unrecognized_eh_frame_sections_)
+-      this->fde_offsets_.push_back(std::make_pair(fde_offset, fde_encoding));
++      {
++	Hold_lock(*this->lock_);
++	this->fde_offsets_.push_back(std::make_pair(fde_offset, fde_encoding));
++      }
+   }
+ 
+  protected:
+@@ -157,6 +160,8 @@ class Eh_frame_hdr : public Output_section_data
+   // Whether we found any .eh_frame sections which we could not
+   // process.
+   bool any_unrecognized_eh_frame_sections_;
++  // Lock held while updating fde_offsets_.
++  Lock* lock_;
+ };
+ 
+ // This class holds an FDE.