[wasm] remove faux code objects

src/arm/assembler-arm.cc

Index: src/arm/assembler-arm.cc
diff --git a/src/arm/assembler-arm.cc b/src/arm/assembler-arm.cc
index da8e4327ce6588560ca2325ce68fd0df66e0079a..a02c5e519113b426e561bdd640dc9a12d6fcc36a 100644
--- a/src/arm/assembler-arm.cc
+++ b/src/arm/assembler-arm.cc
@@ -249,6 +249,11 @@ uint32_t RelocInfo::wasm_memory_size_reference() {
   return reinterpret_cast<uint32_t>(Assembler::target_address_at(pc_, host_));
 }
 
+uint32_t RelocInfo::wasm_function_index() {

[titzer, 2016/06/02 13:17:08]

This function basically assumes that the call site has not been patched to
already refer directly to the address which is being called. If this function is
called after the WASM call is patched, this is going to return that address.

How will this work with serialization/deserialization?

[Mircea Trofin, 2016/06/02 14:46:21]

The statement about the assumption is correct.

Serialization/deserialization are not affected. We can do them either before or
after linking. We just need to avoid linking twice. I validated doing ser/deser
before linking locally.

+  DCHECK(IsWasmDirectCall(rmode_));
+  return reinterpret_cast<uint32_t>(Assembler::target_address_at(pc_, host_));
+}
+
 void RelocInfo::update_wasm_memory_reference(
     Address old_base, Address new_base, uint32_t old_size, uint32_t new_size,
     ICacheFlushMode icache_flush_mode) {