WebAssembly: compile ImageInspectionELF for WebAssembly for now

Author: zhuowei

stdlib/public/runtime/ImageInspectionELF.cpp

@@ -18,11 +18,13 @@
 ///
 //===----------------------------------------------------------------------===//
 
-#if defined(__ELF__)
+#if defined(__ELF__) || defined(__wasm__)
 
 #include "ImageInspection.h"
 #include "ImageInspectionELF.h"
+#ifndef __wasm__
 #include <dlfcn.h>
+#endif
 
 using namespace swift;
 
@@ -127,6 +129,7 @@ void swift_addNewDSOImage(const void *addr) {
 }
 
 int swift::lookupSymbol(const void *address, SymbolInfo *info) {
+#ifndef __wasm__
   Dl_info dlinfo;
   if (dladdr(address, &dlinfo) == 0) {
     return 0;
@@ -137,6 +140,9 @@ int swift::lookupSymbol(const void *address, SymbolInfo *info) {
   info->symbolName.reset(dlinfo.dli_sname);
   info->symbolAddress = dlinfo.dli_saddr;
   return 1;
+#else
+  return 0;
+#endif
 }
 
 // This is only used for backward deployment hooks, which we currently only support for