[Gold] Fix race condition on parallel link

third_party/binutils/ehframe.patch

-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.