wasm linker: fix eliding empty data segments

2 files changed, 9 insertions, 1 deletions

diff --git a/src/link/Wasm.zig b/src/link/Wasm.zig
index 36849cda18..e45555432d 100644
--- a/src/link/Wasm.zig
+++ b/src/link/Wasm.zig
@@ -1410,6 +1410,14 @@ pub const DataSegment = extern struct {
             };
         }
 
+        pub fn isEmpty(id: Id, wasm: *const Wasm) bool {
+            return switch (unpack(id, wasm)) {
+                .__zig_error_name_table => false,
+                .object => |i| i.ptr(wasm).payload.off == .none,
+                inline .uav_exe, .uav_obj, .nav_exe, .nav_obj => |i| i.value(wasm).code.off == .none,
+            };
+        }
+
         pub fn size(id: Id, wasm: *const Wasm) u32 {
             return switch (unpack(id, wasm)) {
                 .__zig_error_name_table => {
diff --git a/src/link/Wasm/Flush.zig b/src/link/Wasm/Flush.zig
index 41f866178d..8da9d78a59 100644
--- a/src/link/Wasm/Flush.zig
+++ b/src/link/Wasm/Flush.zig
@@ -657,7 +657,7 @@ pub fn finish(f: *Flush, wasm: *Wasm) !void {
         var group_index: u32 = 0;
         var offset: u32 = undefined;
         for (segment_ids, segment_offsets) |segment_id, segment_offset| {
-            if (!import_memory and segment_id.isBss(wasm)) {
+            if (segment_id.isEmpty(wasm)) {
                 // It counted for virtual memory but it does not go into the binary.
                 continue;
             }