Add environment variable NIX_SHOW_SYMBOLS for dumping the symbol table

1 files changed, 6 insertions, 0 deletions

diff --git a/src/libexpr/eval.cc b/src/libexpr/eval.cc
index 211f7a55f737..d8e10d9f20e1 100644
--- a/src/libexpr/eval.cc
+++ b/src/libexpr/eval.cc
@@ -1811,6 +1811,7 @@ void EvalState::printStats()
             gc.attr("totalBytes", totalBytes);
         }
 #endif
+
         if (countCalls) {
             {
                 auto obj = topObj.object("primops");
@@ -1846,6 +1847,11 @@ void EvalState::printStats()
                 }
             }
         }
+
+        if (getEnv("NIX_SHOW_SYMBOLS", "0") != "0") {
+            auto list = topObj.list("symbols");
+            symbols.dump([&](const std::string & s) { list.elem(s); });
+        }
     }
 }