3 files changed, 49 insertions, 0 deletions
diff --git a/src/tools/rust-analyzer/crates/syntax/fuzz/Cargo.toml b/src/tools/rust-analyzer/crates/syntax/fuzz/Cargo.toml
new file mode 100644
index 000000000..ba2f515b0
--- /dev/null
+++ b/src/tools/rust-analyzer/crates/syntax/fuzz/Cargo.toml
@@ -0,0 +1,27 @@
+
+[package]
+name = "syntax-fuzz"
+version = "0.0.1"
+publish = false
+edition = "2021"
+rust-version = "1.57"
+
+[package.metadata]
+cargo-fuzz = true
+
+[dependencies]
+syntax = { path = "..", version = "0.0.0" }
+text_edit = { path = "../../text_edit", version = "0.0.0" }
+libfuzzer-sys = { git = "https://github.com/rust-fuzz/libfuzzer-sys.git" }
+
+# Prevent this from interfering with workspaces
+[workspace]
+members = ["."]
+
+[[bin]]
+name = "parser"
+path = "fuzz_targets/parser.rs"
+
+[[bin]]
+name = "reparse"
+path = "fuzz_targets/reparse.rs"
diff --git a/src/tools/rust-analyzer/crates/syntax/fuzz/fuzz_targets/parser.rs b/src/tools/rust-analyzer/crates/syntax/fuzz/fuzz_targets/parser.rs
new file mode 100644
index 000000000..f80e13002
--- /dev/null
+++ b/src/tools/rust-analyzer/crates/syntax/fuzz/fuzz_targets/parser.rs
@@ -0,0 +1,11 @@
+//! Fuzzing for from-scratch parsing.
+
+#![no_main]
+use libfuzzer_sys::fuzz_target;
+use syntax::fuzz::check_parser;
+
+fuzz_target!(|data: &[u8]| {
+    if let Ok(text) = std::str::from_utf8(data) {
+        check_parser(text)
+    }
+});
diff --git a/src/tools/rust-analyzer/crates/syntax/fuzz/fuzz_targets/reparse.rs b/src/tools/rust-analyzer/crates/syntax/fuzz/fuzz_targets/reparse.rs
new file mode 100644
index 000000000..f865ce8d6
--- /dev/null
+++ b/src/tools/rust-analyzer/crates/syntax/fuzz/fuzz_targets/reparse.rs
@@ -0,0 +1,11 @@
+//! Fuzzing for incremental parsing.
+
+#![no_main]
+use libfuzzer_sys::fuzz_target;
+use syntax::fuzz::CheckReparse;
+
+fuzz_target!(|data: &[u8]| {
+    if let Some(check) = CheckReparse::from_data(data) {
+        check.run();
+    }
+});