3 files changed, 19 insertions, 2 deletions
diff --git a/src/binaryen-c.cpp b/src/binaryen-c.cpp
index d0c672abd..3d311f5bd 100644
--- a/src/binaryen-c.cpp
+++ b/src/binaryen-c.cpp
@@ -3722,6 +3722,20 @@ size_t BinaryenGetMemorySegmentByteLength(BinaryenModuleRef module,
   const Memory::Segment& segment = wasm->memory.segments[id];
   return segment.data.size();
 }
+int BinaryenGetMemorySegmentPassive(BinaryenModuleRef module,
+                                    BinaryenIndex id) {
+  if (tracing) {
+    std::cout << "  BinaryenGetMemorySegmentPassive(the_module, " << id
+              << ");\n";
+  }
+
+  auto* wasm = (Module*)module;
+  if (wasm->memory.segments.size() <= id) {
+    Fatal() << "invalid segment id.";
+  }
+  const Memory::Segment& segment = wasm->memory.segments[id];
+  return segment.isPassive;
+}
 void BinaryenCopyMemorySegmentData(BinaryenModuleRef module,
                                    BinaryenIndex id,
                                    char* buffer) {
diff --git a/src/binaryen-c.h b/src/binaryen-c.h
index 067812438..d4ea9ccfa 100644
--- a/src/binaryen-c.h
+++ b/src/binaryen-c.h
@@ -1220,6 +1220,8 @@ BINARYEN_API uint32_t
 BinaryenGetMemorySegmentByteOffset(BinaryenModuleRef module, BinaryenIndex id);
 BINARYEN_API size_t BinaryenGetMemorySegmentByteLength(BinaryenModuleRef module,
                                                        BinaryenIndex id);
+BINARYEN_API int BinaryenGetMemorySegmentPassive(BinaryenModuleRef module,
+                                                 BinaryenIndex id);
 BINARYEN_API void BinaryenCopyMemorySegmentData(BinaryenModuleRef module,
                                                 BinaryenIndex id,
                                                 char* buffer);
diff --git a/src/js/binaryen.js-post.js b/src/js/binaryen.js-post.js
index 54f21ed07..5857c21c9 100644
--- a/src/js/binaryen.js-post.js
+++ b/src/js/binaryen.js-post.js
@@ -2212,7 +2212,7 @@ function wrapModule(module, self) {
   }
   self['getMemorySegmentInfoByIndex'] = function(id) {
     return {
-      'byteOffset': Module['_BinaryenGetMemorySegmentByteOffset'](module, id),
+      'offset': Module['_BinaryenGetMemorySegmentByteOffset'](module, id),
       'data': (function(){
         var size = Module['_BinaryenGetMemorySegmentByteLength'](module, id);
         var ptr = _malloc(size);
@@ -2221,7 +2221,8 @@ function wrapModule(module, self) {
         res.set(new Uint8Array(buffer, ptr, size));
         _free(ptr);
         return res.buffer;
-      })()
+      })(),
+      'passive': Boolean(Module['_BinaryenGetMemorySegmentPassive'](module, id))
     };
   }
   self['setStart'] = function(start) {