From 1b93d83ff7d60c840bda56dd331cacefa782eb12 Mon Sep 17 00:00:00 2001
From: Boshen <boshenc@gmail.com>
Date: Sun, 12 Mar 2023 00:44:42 +0800
Subject: [PATCH] chore(oxc_parser): setup fuzzer

closes #155
---
 .github/workflows/fuzz.yaml                   |  27 ++
 crates/oxc_parser/fuzz/.gitignore             |   3 +
 crates/oxc_parser/fuzz/Cargo.lock             | 338 ++++++++++++++++++
 crates/oxc_parser/fuzz/Cargo.toml             |  26 ++
 crates/oxc_parser/fuzz/REAME.md               |  14 +
 crates/oxc_parser/fuzz/fuzz_targets/parser.rs |  15 +
 6 files changed, 423 insertions(+)
 create mode 100644 .github/workflows/fuzz.yaml
 create mode 100644 crates/oxc_parser/fuzz/.gitignore
 create mode 100644 crates/oxc_parser/fuzz/Cargo.lock
 create mode 100644 crates/oxc_parser/fuzz/Cargo.toml
 create mode 100644 crates/oxc_parser/fuzz/REAME.md
 create mode 100644 crates/oxc_parser/fuzz/fuzz_targets/parser.rs

diff --git a/.github/workflows/fuzz.yaml b/.github/workflows/fuzz.yaml
new file mode 100644
index 000000000..adc9f5f78
--- /dev/null
+++ b/.github/workflows/fuzz.yaml
@@ -0,0 +1,27 @@
+name: Cargo Fuzz
+
+on:
+  workflow_dispatch:
+
+env:
+  CARGO_TERM_QUIET: true
+
+jobs:
+  fuzz:
+    name: Cargo Fuzz
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Cache
+        uses: Swatinem/rust-cache@v2
+
+      - name: Install cargo-fuzz
+        run: cargo install cargo-fuzz
+
+      - name: Run
+        run: |
+          cd crates/oxc_parser/fuzz
+          cargo fuzz run --release parser -- -only_ascii=1 -max_total_time=900
+
diff --git a/crates/oxc_parser/fuzz/.gitignore b/crates/oxc_parser/fuzz/.gitignore
new file mode 100644
index 000000000..a0925114d
--- /dev/null
+++ b/crates/oxc_parser/fuzz/.gitignore
@@ -0,0 +1,3 @@
+target
+corpus
+artifacts
diff --git a/crates/oxc_parser/fuzz/Cargo.lock b/crates/oxc_parser/fuzz/Cargo.lock
new file mode 100644
index 000000000..f5022a312
--- /dev/null
+++ b/crates/oxc_parser/fuzz/Cargo.lock
@@ -0,0 +1,338 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "arbitrary"
+version = "1.2.3"
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+checksum = "0d261e256854913907f67ed06efbc3338dfe6179796deefc1ff763fc1aee5535"
+
+[[package]]
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+ "rustversion",
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+ "ryu",
+ "serde",
+ "static_assertions",
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+ "libc",
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+checksum = "99227334921fae1a979cf0bfdfcc6b3e5ce376ef57e16fb6fb3ea2ed6095f80c"
+
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+checksum = "beb09950ae85a0a94b27676cccf37da5ff13f27076aa1adbc6545dd0d0e1bd4e"
+dependencies = [
+ "arbitrary",
+ "cc",
+ "once_cell",
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+source = "registry+https://github.com/rust-lang/crates.io-index"
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+dependencies = [
+ "miette-derive",
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+]
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+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
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+ "num-traits",
+]
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+ "autocfg",
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+ "num-traits",
+ "serde",
+]
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+[[package]]
+name = "oxc_allocator"
+version = "0.0.0"
+dependencies = [
+ "bumpalo",
+ "serde",
+]
+
+[[package]]
+name = "oxc_ast"
+version = "0.0.0"
+dependencies = [
+ "bitflags",
+ "compact_str",
+ "miette",
+ "num-bigint",
+ "ordered-float",
+ "oxc_allocator",
+ "ryu-js",
+ "serde",
+ "thiserror",
+]
+
+[[package]]
+name = "oxc_diagnostics"
+version = "0.0.0"
+dependencies = [
+ "miette",
+ "oxc_ast",
+ "thiserror",
+]
+
+[[package]]
+name = "oxc_fuzzer"
+version = "0.0.0"
+dependencies = [
+ "libfuzzer-sys",
+ "oxc_allocator",
+ "oxc_ast",
+ "oxc_parser",
+]
+
+[[package]]
+name = "oxc_parser"
+version = "0.0.0"
+dependencies = [
+ "bitflags",
+ "num-bigint",
+ "oxc_allocator",
+ "oxc_ast",
+ "oxc_diagnostics",
+ "rustc-hash",
+ "unicode-id-start",
+]
+
+[[package]]
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+ "thiserror-impl",
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+
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diff --git a/crates/oxc_parser/fuzz/Cargo.toml b/crates/oxc_parser/fuzz/Cargo.toml
new file mode 100644
index 000000000..d8c9f0583
--- /dev/null
+++ b/crates/oxc_parser/fuzz/Cargo.toml
@@ -0,0 +1,26 @@
+[package]
+name = "oxc_fuzzer"
+version = "0.0.0"
+publish = false
+edition = "2018"
+
+[package.metadata]
+cargo-fuzz = true
+
+[dependencies]
+oxc_ast = { path = "../../oxc_ast" }
+oxc_allocator = { path = "../../oxc_allocator" }
+libfuzzer-sys = "0.4"
+
+[dependencies.oxc_parser]
+path = ".."
+
+# Prevent this from interfering with workspaces
+[workspace]
+members = ["."]
+
+[[bin]]
+name = "parser"
+path = "fuzz_targets/parser.rs"
+test = false
+doc = false
diff --git a/crates/oxc_parser/fuzz/REAME.md b/crates/oxc_parser/fuzz/REAME.md
new file mode 100644
index 000000000..5862d6a0f
--- /dev/null
+++ b/crates/oxc_parser/fuzz/REAME.md
@@ -0,0 +1,14 @@
+# Fuzzer
+
+# Installation
+
+```bash
+cargo install cargo-fuzz
+```
+
+Run fuzzer for the parser, for 15mins.
+
+```bash
+cd crates/oxc_parser/fuzz
+cargo fuzz run parser -- -only_ascii=1 -max_total_time=900
+```
diff --git a/crates/oxc_parser/fuzz/fuzz_targets/parser.rs b/crates/oxc_parser/fuzz/fuzz_targets/parser.rs
new file mode 100644
index 000000000..8e57810a0
--- /dev/null
+++ b/crates/oxc_parser/fuzz/fuzz_targets/parser.rs
@@ -0,0 +1,15 @@
+#![no_main]
+
+use oxc_allocator::Allocator;
+use oxc_ast::SourceType;
+use oxc_parser::Parser;
+
+libfuzzer_sys::fuzz_target!(|data: &[u8]| {
+    if let Ok(s) = std::str::from_utf8(data) {
+        if s.chars().all(|s| !s.is_control()) {
+            let allocator = Allocator::default();
+            let source_type = *SourceType::default().with_typescript(true).with_jsx(true);
+            let _ = Parser::new(&allocator, &s, source_type).parse();
+        }
+    }
+});