[PATCH] D71031: [compiler-rt] FuzzedDataProvider: do not call memcpy on empty vector.

[Max Moroz via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rGa44ef027ebca: [compiler-rt] FuzzedDataProvider: do not call memcpy on empty vector. (authored by Dor1s).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D71031/new/

https://reviews.llvm.org/D71031

Files:
  compiler-rt/include/fuzzer/FuzzedDataProvider.h


Index: compiler-rt/include/fuzzer/FuzzedDataProvider.h
===================================================================
--- compiler-rt/include/fuzzer/FuzzedDataProvider.h
+++ compiler-rt/include/fuzzer/FuzzedDataProvider.h
@@ -263,6 +263,12 @@
     // which seems to be a natural choice for other implementations as well.
     // To increase the odds even more, we also call |shrink_to_fit| below.
     std::vector<T> result(size);
+    if (size == 0) {
+      if (num_bytes_to_consume != 0)
+        abort();
+      return result;
+    }
+
     std::memcpy(result.data(), data_ptr_, num_bytes_to_consume);
     Advance(num_bytes_to_consume);
 


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