From 5a26bf829935bc9697c7971115ef9779761c4c8b Mon Sep 17 00:00:00 2001
From: Erin <erin@erindesu.cz>
Date: Wed, 26 Jul 2023 01:01:53 +0200
Subject: [PATCH] Added fuzzy tests

---
 hbvm/fuzz/.gitignore         |  5 +++++
 hbvm/fuzz/Cargo.toml         | 27 +++++++++++++++++++++++++++
 hbvm/fuzz/fuzz_targets/vm.rs | 29 +++++++++++++++++++++++++++++
 3 files changed, 61 insertions(+)
 create mode 100644 hbvm/fuzz/.gitignore
 create mode 100644 hbvm/fuzz/Cargo.toml
 create mode 100644 hbvm/fuzz/fuzz_targets/vm.rs

diff --git a/hbvm/fuzz/.gitignore b/hbvm/fuzz/.gitignore
new file mode 100644
index 0000000..615384a
--- /dev/null
+++ b/hbvm/fuzz/.gitignore
@@ -0,0 +1,5 @@
+target
+artifacts
+corpus
+coverage
+Cargo.lock
\ No newline at end of file
diff --git a/hbvm/fuzz/Cargo.toml b/hbvm/fuzz/Cargo.toml
new file mode 100644
index 0000000..f6bc616
--- /dev/null
+++ b/hbvm/fuzz/Cargo.toml
@@ -0,0 +1,27 @@
+[package]
+name = "hbvm-fuzz"
+version = "0.0.0"
+publish = false
+edition = "2021"
+
+[package.metadata]
+cargo-fuzz = true
+
+[dependencies]
+libfuzzer-sys = "0.4"
+
+[dependencies.hbvm]
+path = ".."
+
+# Prevent this from interfering with workspaces
+[workspace]
+members = ["."]
+
+[profile.release]
+debug = 1
+
+[[bin]]
+name = "vm"
+path = "fuzz_targets/vm.rs"
+test = false
+doc = false
diff --git a/hbvm/fuzz/fuzz_targets/vm.rs b/hbvm/fuzz/fuzz_targets/vm.rs
new file mode 100644
index 0000000..1371903
--- /dev/null
+++ b/hbvm/fuzz/fuzz_targets/vm.rs
@@ -0,0 +1,29 @@
+#![no_main]
+
+use {
+    hbvm::vm::{
+        mem::{HandlePageFault, Memory, MemoryAccessReason, PageSize},
+        Vm,
+    },
+    libfuzzer_sys::fuzz_target,
+};
+
+fuzz_target!(|data: &[u8]| {
+    if let Ok(mut vm) = Vm::<_, 0>::new_validated(data, TestTrapHandler) {
+        let _ = vm.run();
+    }
+});
+
+struct TestTrapHandler;
+impl HandlePageFault for TestTrapHandler {
+    fn page_fault(
+        &mut self,
+        _: MemoryAccessReason,
+        _: &mut Memory,
+        _: u64,
+        _: PageSize,
+        _: *mut u8,
+    ) -> bool {
+        false
+    }
+}