android: Realign stack pointer on JNI entry.

base/android/jni_generator/jni_generator.py

 #!/usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Extracts native methods from a Java file and generates the JNI bindings.
 If you change this, please run and update the tests."""
 
 import collections
 import errno
@@ skipping 1004 matching lines @@
     if is_method:
       optional_error_return = JavaReturnValueToC(native.return_type)
       if optional_error_return:
         optional_error_return = ', ' + optional_error_return
       values.update({
           'OPTIONAL_ERROR_RETURN': optional_error_return,
           'PARAM0_NAME': native.params[0].name,
           'P0_TYPE': native.p0_type,
       })
       template = Template("""\
-extern "C" __attribute__((visibility("default")))
-${RETURN} ${STUB_NAME}(JNIEnv* env,
-    ${PARAMS_IN_STUB}) {
+JNI_GENERATOR_EXPORT ${RETURN} ${STUB_NAME}(JNIEnv* env, ${PARAMS_IN_STUB}) {
   ${P0_TYPE}* native = reinterpret_cast<${P0_TYPE}*>(${PARAM0_NAME});
   CHECK_NATIVE_PTR(env, jcaller, native, "${NAME}"${OPTIONAL_ERROR_RETURN});
   return native->${NAME}(${PARAMS_IN_CALL})${POST_CALL};
 }
 """)
     else:
       template = Template("""
 static ${RETURN_DECLARATION} ${NAME}(JNIEnv* env, ${PARAMS});
 
-extern "C" __attribute__((visibility("default")))
-${RETURN} ${STUB_NAME}(JNIEnv* env, ${PARAMS_IN_STUB}) {
+JNI_GENERATOR_EXPORT ${RETURN} ${STUB_NAME}(JNIEnv* env, ${PARAMS_IN_STUB}) {
   return ${NAME}(${PARAMS_IN_CALL})${POST_CALL};
 }
 """)
 
     return template.substitute(values)
 
   def GetArgument(self, param):
     if param.datatype == 'int':
       return 'as_jint(' + param.name + ')'
     elif re.match(RE_SCOPED_JNI_TYPES, JavaDataTypeToC(param.datatype)):
@@ skipping 329 matching lines @@
     root_name = os.path.splitext(os.path.basename(input_file))[0]
     output_file = os.path.join(options.output_dir, root_name) + '_jni.h'
   GenerateJNIHeader(input_file, output_file, options)
 
   if options.depfile:
     build_utils.WriteDepfile(options.depfile, output_file)
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))