From 34b2e8029b52396f336b9fc8873f841aa7425670 Mon Sep 17 00:00:00 2001
From: Rui Ueyama <ruiu@cs.stanford.edu>
Date: Sat, 13 Mar 2021 18:24:03 +0900
Subject: [PATCH] wip

---
 input_sections.cc | 10 ++++++----
 mold.h            |  2 +-
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/input_sections.cc b/input_sections.cc
index 81aec67f..1cfb04f7 100644
--- a/input_sections.cc
+++ b/input_sections.cc
@@ -576,8 +576,10 @@ void InputSection::scan_relocations() {
 }
 
 void InputSection::kill() {
-  is_alive = false;
-  for (FdeRecord &fde : fdes)
-    fde.is_alive = false;
-  file.sections[section_idx] = nullptr;
+  if (is_alive.exchange(false)) {
+    is_alive = false;
+    for (FdeRecord &fde : fdes)
+      fde.is_alive = false;
+    file.sections[section_idx] = nullptr;
+  }
 }
diff --git a/mold.h b/mold.h
index 1361deb5..b6adf8b3 100644
--- a/mold.h
+++ b/mold.h
@@ -413,7 +413,7 @@ public:
   bool is_ehframe = false;
 
   // For COMDAT de-duplication and garbage collection
-  bool is_alive = true;
+  std::atomic_bool is_alive = true;
 
   // For garbage collection
   std::atomic_bool is_visited = false;