LibJS: Dump a JavaScript backtrace when throwing exceptions

1 files changed, 7 insertions, 0 deletions

diff --git a/Libraries/LibJS/Interpreter.cpp b/Libraries/LibJS/Interpreter.cpp
index 06362bc173..48820e9f10 100644
--- a/Libraries/LibJS/Interpreter.cpp
+++ b/Libraries/LibJS/Interpreter.cpp
@@ -219,6 +219,13 @@ Value Interpreter::throw_exception(Exception* exception)
     if (exception->value().is_object() && exception->value().as_object().is_error()) {
         auto& error = static_cast<Error&>(exception->value().as_object());
         dbg() << "Throwing JavaScript Error: " << error.name() << ", " << error.message();
+
+        for (ssize_t i = m_call_stack.size() - 1; i >= 0; --i) {
+            auto function_name = m_call_stack[i].function_name;
+            if (function_name.is_empty())
+                function_name = "<anonymous>";
+            dbg() << "  " << function_name;
+        }
     }
     m_exception = exception;
     unwind(ScopeType::Try);