diff --git a/lld/ELF/Driver.cpp b/lld/ELF/Driver.cpp
--- a/lld/ELF/Driver.cpp
+++ b/lld/ELF/Driver.cpp
@@ -582,6 +582,10 @@
 
     timeTraceProfilerCleanup();
   }
+
+  if (args.getLastArg(OPT_debug_crash)) {
+    LLVM_BUILTIN_TRAP;
+  }
 }
 
 static std::string getRpath(opt::InputArgList &args) {
diff --git a/lld/ELF/Options.td b/lld/ELF/Options.td
--- a/lld/ELF/Options.td
+++ b/lld/ELF/Options.td
@@ -351,6 +351,12 @@
   Eq<"reproduce",
      "Write tar file containing inputs and command to reproduce link">;
 
+def reproduce_on_crash: F<"reproduce-on-crash">,
+     HelpText<"Generate tar file containing inputs and command when program crashes">;
+
+def debug_crash: F<"debug-crash">,
+    HelpText<"Debug flag to crash lld on purpose">;
+
 defm rosegment: BB<"rosegment",
   "Put read-only non-executable sections in their own segment (default)",
   "Do not put read-only non-executable sections in their own segment">;
diff --git a/lld/tools/lld/lld.cpp b/lld/tools/lld/lld.cpp
--- a/lld/tools/lld/lld.cpp
+++ b/lld/tools/lld/lld.cpp
@@ -173,8 +173,40 @@
     llvm::CrashRecoveryContext crc;
     if (!crc.RunSafely([&]() {
           r = lldMain(argc, argv, stdoutOS, stderrOS, /*exitEarly=*/false);
-        }))
-      return {crc.RetCode, /*canRunAgain=*/false};
+        })) {
+      // lld crashed, save return code.
+      SafeReturn ret{crc.RetCode, /*canRunAgain=*/false};
+      // Generate reproducer if related flag is specified.
+      std::vector<const char *> args(argv, argv + argc);
+      bool hasReproducer = false;
+      bool hasReproduceOnCrash = false;
+      for (const char *arg : args) {
+        std::string arg_str(arg);
+        if (arg_str == "--reproduce-on-crash")
+          hasReproduceOnCrash = true;
+        if (StringRef(arg_str).startswith("--reproduce="))
+          hasReproducer = true;
+      }
+      if (hasReproduceOnCrash && !hasReproducer) {
+        // Creat temp file for reproducer.
+        SmallString<128> reproducerPath;
+        std::error_code EC =
+            llvm::sys::fs::createTemporaryFile("lld", "tar", reproducerPath);
+        if (EC) {
+          stderrOS << "failed to create temporary file for reproducer\n";
+          return ret;
+        }
+        stdoutOS << "reproducer writes to \"" << reproducerPath << "\"\n";
+        std::string reproduceArg = "--reproduce=" + std::string(reproducerPath);
+        args.push_back(reproduceArg.c_str());
+        llvm::CrashRecoveryContext crcReproducer;
+        crcReproducer.RunSafely([&]() {
+          lldMain(args.size(), args.data(), stdoutOS, stderrOS,
+                  /*exitEarly=*/false);
+        });
+      }
+      return ret;
+    }
   }
 
   // Cleanup memory and reset everything back in pristine condition. This path