Export memalign along with malloc and friends (#888)

Emscripten's mmap2 syscall started using memalign instead of malloc with kripken/emscripten#4874, so we need to export that as well.

1 files changed, 5 insertions, 9 deletions

diff --git a/src/wasm-linker.cpp b/src/wasm-linker.cpp
index a319af889..757fc88ca 100644
--- a/src/wasm-linker.cpp
+++ b/src/wasm-linker.cpp
@@ -254,20 +254,16 @@ void Linker::layout() {
     }
   }
 
-  // Export malloc, realloc, and free whenever availble. JavsScript version of
+  // Export malloc/realloc/free/memalign whenever availble. JavsScript version of
   // malloc has some issues and it cannot be called once _sbrk() is called, and
   // JS glue code does not have realloc().  TODO This should get the list of
   // exported functions from emcc.py - it has EXPORTED_FUNCTION metadata to keep
   // track of this. Get the list of exported functions using a command-line
   // argument from emcc.py and export all of them.
-  if (out.symbolInfo.implementedFunctions.count("malloc")) {
-    exportFunction("malloc", true);
-  }
-  if (out.symbolInfo.implementedFunctions.count("free")) {
-    exportFunction("free", true);
-  }
-  if (out.symbolInfo.implementedFunctions.count("realloc")) {
-    exportFunction("realloc", true);
+  for (auto function : {"malloc", "free", "realloc", "memalign"}) {
+    if (out.symbolInfo.implementedFunctions.count(function)) {
+      exportFunction(function, true);
+    }
   }
 
   // finalize function table