build enough of libcxxabi to support bad_typeid without undefined symbols; 1.21.5; fixes #2547

Author: kripken

emscripten-version.txt

@@ -1,2 +1,2 @@
-1.21.4
+1.21.5
 

tests/test_core.py

@@ -1477,6 +1477,34 @@ def test_exceptions_alias(self):
     src, output = (test_path + s for s in ('.c', '.out'))
     self.do_run_from_file(src, output)
 
+  def test_bad_typeid(self):
+    if self.emcc_args is None: return self.skip('requires emcc')
+
+    Settings.ERROR_ON_UNDEFINED_SYMBOLS = 1
+    Settings.DISABLE_EXCEPTION_CATCHING = 0
+
+    self.do_run(r'''
+// exception example
+#include <iostream>       // std::cerr
+#include <typeinfo>       // operator typeid
+#include <exception>      // std::exception
+
+class Polymorphic {virtual void member(){}};
+
+int main () {
+  try
+  {
+    Polymorphic * pb = 0;
+    typeid(*pb);  // throws a bad_typeid exception
+  }
+  catch (std::exception& e)
+  {
+    std::cerr << "exception caught: " << e.what() << '\n';
+  }
+  return 0;
+}
+    ''', 'exception caught: std::bad_typeid')
+
   def test_exit_stack(self):
     if self.emcc_args is None: return self.skip('requires emcc')
     if Settings.ASM_JS: return self.skip('uses report_stack without exporting')

tools/system_libs.py

@@ -27,7 +27,7 @@ def read_symbols(path, exclude=None):
       symbols = filter(lambda symbol: symbol not in exclude, symbols)
     return set(symbols)
 
-  lib_opts = ['-O2']
+  lib_opts = ['-O2', '-I' + shared.path_from_root('system', 'lib', 'libcxxabi', 'include')]
 
   # XXX We also need to add libc symbols that use malloc, for example strdup. It's very rare to use just them and not
   #     a normal malloc symbol (like free, after calling strdup), so we haven't hit this yet, but it is possible.
@@ -421,7 +421,15 @@ def apply_libcxx(need):
   def create_libcxxabi():
     logging.debug('building libcxxabi for cache')
     libcxxabi_files = [
+      'abort_message.cpp',
+      'cxa_aux_runtime.cpp',
+      'cxa_default_handlers.cpp',
+      'cxa_demangle.cpp',
+      'cxa_exception_storage.cpp',
+      'cxa_new_delete.cpp',
+      'cxa_handlers.cpp',
       'exception.cpp',
+      'stdexcept.cpp',
       'typeinfo.cpp',
       'private_typeinfo.cpp',
     ]