[codex] add row encoder order fuzzer

fuzz/Cargo.toml

@@ -39,6 +39,7 @@ vortex-error = { workspace = true }
 vortex-fsst = { workspace = true }
 vortex-io = { workspace = true }
 vortex-mask = { workspace = true }
+vortex-row = { workspace = true }
 vortex-runend = { workspace = true, features = ["arbitrary"] }
 vortex-session = { workspace = true }
 vortex-utils = { workspace = true }
@@ -97,6 +98,14 @@ path = "fuzz_targets/fsst_like.rs"
 test = false
 required-features = ["native"]
 
+[[bin]]
+bench = false
+doc = false
+name = "row_order"
+path = "fuzz_targets/row_order.rs"
+test = false
+required-features = ["native"]
+
 [[bin]]
 bench = false
 doc = false

fuzz/fuzz_targets/row_order.rs

@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: Copyright the Vortex contributors
+
+#![no_main]
+
+use libfuzzer_sys::Corpus;
+use libfuzzer_sys::fuzz_target;
+use vortex_error::vortex_panic;
+use vortex_fuzz::FuzzRowOrder;
+use vortex_fuzz::run_row_order_fuzz;
+
+fuzz_target!(|fuzz: FuzzRowOrder| -> Corpus {
+    match run_row_order_fuzz(fuzz) {
+        Ok(true) => Corpus::Keep,
+        Ok(false) => Corpus::Reject,
+        Err(e) => vortex_panic!("{e}"),
+    }
+});

fuzz/src/lib.rs

@@ -7,6 +7,7 @@ mod array;
 pub mod compress;
 pub mod error;
 pub mod fsst_like;
+pub mod row_order;
 
 // File module only available for native builds (requires vortex-file which uses tokio)
 #[cfg(not(target_arch = "wasm32"))]
@@ -31,6 +32,8 @@ pub use fsst_like::run_fsst_like_fuzz;
 pub use gpu::FuzzCompressGpu;
 #[cfg(feature = "cuda")]
 pub use gpu::run_compress_gpu;
+pub use row_order::FuzzRowOrder;
+pub use row_order::run_row_order_fuzz;
 
 pub const FUZZ_ARRAY_MAX_LEN: usize = 2048;
 pub const FUZZ_FILE_ARRAY_MAX_LEN: usize = 16_384;