[wasm] Encode function signatures, bodies, and names as separate sections.

test/unittests/wasm/module-decoder-unittest.cc

Index: test/unittests/wasm/module-decoder-unittest.cc
diff --git a/test/unittests/wasm/module-decoder-unittest.cc b/test/unittests/wasm/module-decoder-unittest.cc
index 988caafcaf54b7639045c5cb9c1c7a009b36b837..5f8e1cb8417b43853204d8f9069ece795bd2828e 100644
--- a/test/unittests/wasm/module-decoder-unittest.cc
+++ b/test/unittests/wasm/module-decoder-unittest.cc
@@ -1059,12 +1059,20 @@ TEST_F(WasmModuleVerifyTest, ImportTable_off_end) {
   EXPECT_OFF_END_FAILURE(data, 5, sizeof(data));
 }
 
-TEST_F(WasmModuleVerifyTest, ExportTable_empty) {
-  static const byte data[] = {kDeclSignatures,  0, kDeclFunctions, 0,
+TEST_F(WasmModuleVerifyTest, ExportTable_empty1) {
+  static const byte data[] = {kDeclSignatures,  1, VOID_VOID_SIG,
+                              kDeclFunctions,   1, EMPTY_FUNCTION(0),
                               kDeclExportTable, 0};
   EXPECT_VERIFIES(data);
 }
 
+TEST_F(WasmModuleVerifyTest, ExportTable_empty2) {
+  static const byte data[] = {kDeclSignatures,  0, kDeclFunctions, 0,
+                              kDeclExportTable, 0};
+  // TODO(titzer): current behavior treats empty functions section as missing.

[binji, 2016/03/09 22:20:17]

OK, so I should emit an empty function section when I add this to sexpr-wasm?

+  EXPECT_FAILURE(data);
+}
+
 TEST_F(WasmModuleVerifyTest, ExportTable_NoFunctions1) {
   static const byte data[] = {kDeclSignatures, 0, kDeclExportTable, 0};
   EXPECT_FAILURE(data);