Better memory fuzzing (#1987)

Hash the contents of all of memory and log that out in random places in the fuzzer, so we are more sensitive there and can catch memory bugs.

Fix UB that was uncovered by this in the binary writing code - if a segment is empty, we should not look at &vector[0], and instead use vector.data().

Add Builder::addExport convenience method.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/wasm/wasm-binary.cpp b/src/wasm/wasm-binary.cpp
index b1fc03017..2ee528392 100644
--- a/src/wasm/wasm-binary.cpp
+++ b/src/wasm/wasm-binary.cpp
@@ -330,7 +330,7 @@ void WasmBinaryWriter::writeDataSegments() {
       writeExpression(segment.offset);
       o << int8_t(BinaryConsts::End);
     }
-    writeInlineBuffer(&segment.data[0], segment.data.size());
+    writeInlineBuffer(segment.data.data(), segment.data.size());
   }
   finishSection(start);
 }