actually commit the fuzz target and a bit of test binary

3 files changed, 290 insertions, 0 deletions

diff --git a/fuzz/Cargo.lock b/fuzz/Cargo.lock
new file mode 100644
index 0000000..8de7bec
--- /dev/null
+++ b/fuzz/Cargo.lock
@@ -0,0 +1,149 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "arbitrary"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7d5a26814d8dcb93b0e5a0ff3c6d80a8843bafb21b39e8e18a6f05471870e110"
+
+[[package]]
+name = "autocfg"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+
+[[package]]
+name = "cc"
+version = "1.0.83"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1174fb0b6ec23863f8b971027804a42614e347eafb0a95bf0b12cdae21fc4d0"
+dependencies = [
+ "jobserver",
+ "libc",
+]
+
+[[package]]
+name = "jobserver"
+version = "0.1.27"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8c37f63953c4c63420ed5fd3d6d398c719489b9f872b9fa683262f8edd363c7d"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.151"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "302d7ab3130588088d277783b1e2d2e10c9e9e4a16dd9050e6ec93fb3e7048f4"
+
+[[package]]
+name = "libfuzzer-sys"
+version = "0.4.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a96cfd5557eb82f2b83fed4955246c988d331975a002961b07c81584d107e7f7"
+dependencies = [
+ "arbitrary",
+ "cc",
+ "once_cell",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "39e3200413f237f41ab11ad6d161bc7239c84dcb631773ccd7de3dfe4b5c267c"
+dependencies = [
+ "autocfg",
+]
+
+[[package]]
+name = "once_cell"
+version = "1.19.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3fdb12b2476b595f9358c5161aa467c2438859caa136dec86c26fdd2efe17b92"
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.70"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "39278fbbf5fb4f646ce651690877f89d1c5811a3d4acb27700c1cb3cdb78fd3b"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.33"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "serde"
+version = "1.0.193"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "25dd9975e68d0cb5aa1120c288333fc98731bd1dd12f561e468ea4728c042b89"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.193"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "43576ca501357b9b071ac53cdc7da8ef0cbd9493d8df094cd821777ea6e894d3"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "syn"
+version = "2.0.41"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "44c8b28c477cc3bf0e7966561e3460130e1255f7a1cf71931075f1c5e7a7e269"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
+
+[[package]]
+name = "yaxpeax-arch"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "36274fcc5403da2a7636ffda4d02eca12a1b2b8267b9d2e04447bd2ccfc72082"
+dependencies = [
+ "num-traits",
+ "serde",
+ "serde_derive",
+]
+
+[[package]]
+name = "yaxpeax-hexagon"
+version = "0.0.1"
+dependencies = [
+ "num-traits",
+ "yaxpeax-arch",
+]
+
+[[package]]
+name = "yaxpeax-hexagon-fuzz"
+version = "0.0.0"
+dependencies = [
+ "libfuzzer-sys",
+ "yaxpeax-arch",
+ "yaxpeax-hexagon",
+]
diff --git a/fuzz/fuzz_targets/no-panic.rs b/fuzz/fuzz_targets/no-panic.rs
new file mode 100644
index 0000000..d2653dd
--- /dev/null
+++ b/fuzz/fuzz_targets/no-panic.rs
@@ -0,0 +1,18 @@
+#![no_main]
+use libfuzzer_sys::fuzz_target;
+
+use yaxpeax_arch::Decoder;
+
+use std::fmt::Write;
+
+fuzz_target!(|data: &[u8]| {
+    let decoder = yaxpeax_hexagon::InstDecoder::default();
+
+    let mut hexagon_inst = yaxpeax_hexagon::InstructionPacket::default();
+
+    let mut words = yaxpeax_arch::U8Reader::new(data);
+
+    // whatever the output, we should be able to format the instruction that was decoded into
+    let _ = decoder.decode_into(&mut hexagon_inst, &mut words);
+    write!(&mut String::new(), "{}", hexagon_inst).expect("formatting does not panic either");
+});
diff --git a/tests/from_docs.rs b/tests/from_docs.rs
new file mode 100644
index 0000000..44db80a
--- /dev/null
+++ b/tests/from_docs.rs
@@ -0,0 +1,123 @@
+use yaxpeax_arch::AddressBase;
+use yaxpeax_arch::Decoder;
+use yaxpeax_arch::LengthedInstruction;
+
+// for "lazy" reasons i've found fairly few known-correct disassemblies to compare against
+
+/*
+fn test_display(bytes: &[u8], text: &str) {
+    let decoder = yaxpeax_hexagon::InstDecoder::default();
+    let inst = decoder.decode(&mut yaxpeax_arch::U8Reader::new(bytes)).expect("decode succeeds");
+    let rendered = format!("{}", inst);
+    assert_eq!(rendered, text);
+}
+*/
+
+#[test]
+fn misc_bytes() {
+    const BYTES: &'static [u8] = &[
+        0x0e, 0xc0, 0x00, 0x58, 0x00, 0xc0, 0x00, 0x58, 0x00, 0xc0, 0x00, 0x58,
+        0x00, 0xc0, 0x00, 0x58, 0x00, 0xc0, 0x00, 0x58, 0x00, 0xc0, 0x00, 0x58,
+        0x00, 0xc0, 0x00, 0x58, 0x02, 0xc7, 0x00, 0x58, 0x00, 0xc0, 0x00, 0x78,
+        0x06, 0xc0, 0x00, 0x67, 0x00, 0xc0, 0x92, 0x6e, 0x00, 0xc3, 0xc0, 0x8c,
+        0x00, 0xc5, 0xc0, 0x8c, 0x12, 0xc0, 0x00, 0x67, 0x00, 0xc0, 0x00, 0xa2,
+        0x00, 0xd0, 0xc0, 0x56, 0x66, 0xc0, 0x00, 0x58, 0x00, 0x00, 0x00, 0x00,
+        0x0f, 0x40, 0x92, 0x6e, 0x04, 0x40, 0xe1, 0x0f, 0x0e, 0xc0, 0x00, 0x78,
+        0x02, 0x40, 0x00, 0x00, 0x01, 0x56, 0x49, 0x6a, 0x25, 0x4c, 0x0e, 0x8c,
+        0x8f, 0xff, 0x2f, 0x76, 0x7f, 0x4e, 0x01, 0xef, 0x24, 0x4c, 0x01, 0x8c,
+        0x34, 0xdf, 0x04, 0x20, 0x02, 0xc0, 0x85, 0x6c, 0x03, 0xc0, 0x84, 0x6c,
+        0x0a, 0xc0, 0x42, 0x6c, 0x27, 0x5d, 0xcb, 0x8c, 0x0c, 0x60, 0x42, 0x73,
+        0xf0, 0x7f, 0x63, 0x75, 0x01, 0xc3, 0x02, 0xf2, 0x07, 0x54, 0x04, 0x8f,
+        0x06, 0x40, 0xca, 0x8c, 0x03, 0x40, 0x2c, 0x74, 0x03, 0xc0, 0x0c, 0x74,
+        0x08, 0xc0, 0x43, 0x6c, 0x26, 0x57, 0x04, 0x8f, 0x0e, 0x5f, 0xae, 0x74,
+        0x8e, 0x5d, 0x2e, 0x74, 0x12, 0xc1, 0x20, 0x5c, 0x00, 0xc2, 0x06, 0x6c,
+        0x02, 0xc0, 0xc0, 0x57, 0x07, 0x54, 0x09, 0x8f, 0x8e, 0x54, 0x29, 0x8f,
+        0x8d, 0xc1, 0x0e, 0xb0, 0x00, 0xc3, 0x06, 0x6c, 0x02, 0xc0, 0xc0, 0x57,
+        0x12, 0x40, 0x0f, 0x67, 0x2f, 0xc1, 0xc0, 0x8c, 0x02, 0xc0, 0xc0, 0x57,
+        0x00, 0xd0, 0xc0, 0x56, 0x02, 0xc0, 0xc0, 0x57, 0x12, 0xc0, 0x0f, 0x67,
+        0x02, 0xc0, 0xc0, 0x57, 0x00, 0xc0, 0x8e, 0x52, 0x00, 0xc2, 0x0a, 0x6c,
+        0x02, 0xc0, 0xc0, 0x57, 0x00, 0xc0, 0x8d, 0x52, 0x00, 0xc3, 0x08, 0x6c,
+        0x02, 0xc0, 0xc0, 0x57, 0x12, 0xc0, 0x00, 0x67, 0x02, 0xc0, 0xc0, 0x57,
+        0x00, 0xc0, 0x9f, 0x52, 0x02, 0xc0, 0xc0, 0x57, 0x00, 0xc0, 0x92, 0x6e,
+        0x02, 0x40, 0x00, 0x7c, 0x00, 0xc8, 0x80, 0x76, 0x12, 0xc0, 0x00, 0x67,
+        0x1e, 0xc0, 0x02, 0x6d, 0x02, 0xc0, 0xc0, 0x57, 0x00, 0xc0, 0x22, 0x63,
+        0x02, 0xc0, 0x22, 0x63, 0x04, 0xc0, 0x02, 0x6d, 0x1c, 0xc0, 0x02, 0x67,
+        0x07, 0xc0, 0x02, 0x67, 0x08, 0xc0, 0x22, 0x62, 0x15, 0xc0, 0x02, 0x67,
+        0xc0, 0x7f, 0xff, 0x0f, 0x00, 0x40, 0x00, 0x78, 0x00, 0x40, 0xe1, 0x0f,
+        0x1a, 0xc0, 0x00, 0x78, 0x18, 0x40, 0x09, 0x6a, 0xc0, 0x71, 0xe1, 0x0f,
+        0x1b, 0x40, 0x00, 0x78, 0x1a, 0xc0, 0x1a, 0xf1, 0x18, 0xc0, 0x18, 0xf1,
+        0x19, 0xd8, 0x3a, 0xf3, 0x04, 0x40, 0x00, 0x00, 0x11, 0xc0, 0x00, 0x78,
+        0x00, 0x40, 0x00, 0x00, 0xf1, 0xc1, 0x91, 0x76, 0x19, 0xc0, 0x11, 0x67,
+        0x07, 0x40, 0x00, 0x00, 0xf1, 0xc7, 0x00, 0x78, 0x17, 0xc0, 0x11, 0x67,
+        0x3a, 0x4f, 0x00, 0x5a, 0x20, 0xea, 0x19, 0x73, 0xa8, 0x46, 0xe1, 0x0f,
+        0x20, 0xc0, 0x99, 0xa1, 0x5e, 0x4f, 0x00, 0x5a, 0x02, 0x40, 0x00, 0x00,
+        0x60, 0xe6, 0x19, 0x73, 0x1a, 0x46, 0x00, 0x5a, 0xa8, 0x46, 0xe1, 0x0f,
+        0x1c, 0xc0, 0x99, 0xa1, 0x26, 0x4f, 0x00, 0x5a, 0x02, 0x40, 0x00, 0x00,
+        0x80, 0xe1, 0x19, 0x73, 0xa7, 0x46, 0xe1, 0x0f, 0x34, 0xc0, 0x99, 0xa1,
+        0xa7, 0x46, 0xe1, 0x0f, 0x80, 0xc3, 0x99, 0x91, 0x40, 0x40, 0x00, 0x75,
+        0x01, 0xc0, 0x00, 0x75, 0xe2, 0xc0, 0x01, 0x5c, 0x00, 0xc0, 0x20, 0xa8,
+        0x00, 0xc0, 0x40, 0xa8, 0xdc, 0xc1, 0x21, 0x5c, 0x0c, 0x4f, 0x00, 0x5a,
+        0x02, 0x40, 0x00, 0x00, 0x80, 0xe5, 0x19, 0x73, 0xa7, 0x46, 0xe1, 0x0f,
+        0x30, 0xc0, 0x99, 0xa1, 0x0c, 0x42, 0xe1, 0x0f, 0x17, 0x42, 0x19, 0xb0,
+        0xa7, 0x46, 0xe1, 0x0f, 0x80, 0xc4, 0x99, 0x91, 0x0a, 0x40, 0x80, 0x11,
+        0x01, 0xc0, 0x97, 0x91, 0x00, 0x40, 0x01, 0x75, 0x00, 0xc0, 0x97, 0x42,
+        0x04, 0xc0, 0x00, 0x58, 0x00, 0xdb, 0x97, 0xa1, 0x0c, 0xc0, 0x9d, 0x6e,
+        0xec, 0x4e, 0x00, 0x5a, 0xa0, 0xee, 0x19, 0x73, 0x04, 0x40, 0x60, 0x70,
+        0xa7, 0x46, 0xe1, 0x0f, 0x38, 0xc0, 0x99, 0xa1, 0xe2, 0x4e, 0x00, 0x5a,
+        0x02, 0x40, 0x00, 0x00, 0xa0, 0xe0, 0x19, 0x73, 0x26, 0x60, 0x00, 0x10,
+        0x05, 0xc0, 0x60, 0x70, 0x04, 0x4f, 0x00, 0x5a, 0x03, 0x40, 0x00, 0x00,
+        0xa0, 0xe0, 0x19, 0x73, 0x06, 0xd9, 0x00, 0xf3, 0xfc, 0x4e, 0x00, 0x5a,
+        0x03, 0x40, 0x00, 0x00, 0x60, 0xe0, 0x19, 0x73, 0x07, 0xd9, 0x00, 0xf3,
+        0xe5, 0x7f, 0xe5, 0xbf, 0x28, 0x40, 0x86, 0x9b, 0x29, 0xc0, 0x87, 0x9b,
+        0x00, 0x4c, 0x09, 0xf2, 0x08, 0x48, 0x00, 0x5c, 0x04, 0xe0, 0x08, 0x74,
+        0xf4, 0xe0, 0x75, 0x12, 0xa7, 0x46, 0xe1, 0x0f, 0x38, 0xc4, 0x99, 0xa1,
+        0xb6, 0x4e, 0x00, 0x5a, 0xc0, 0xee, 0x19, 0x73, 0x04, 0x40, 0x60, 0x70,
+        0xa7, 0x46, 0xe1, 0x0f, 0x3c, 0xc0, 0x99, 0xa1, 0xac, 0x4e, 0x00, 0x5a,
+        0x02, 0x40, 0x00, 0x00, 0xc0, 0xe0, 0x19, 0x73, 0x26, 0x60, 0x00, 0x10,
+        0x05, 0xc0, 0x60, 0x70, 0xce, 0x4e, 0x00, 0x5a, 0x03, 0x40, 0x00, 0x00,
+        0xc0, 0xe0, 0x19, 0x73, 0x06, 0xd9, 0x00, 0xf3, 0xc6, 0x4e, 0x00, 0x5a,
+        0x03, 0x40, 0x00, 0x00, 0x80, 0xe0, 0x19, 0x73, 0x07, 0xd9, 0x00, 0xf3,
+        0xe5, 0x7f, 0xe5, 0xbf, 0x28, 0x40, 0x86, 0x9b, 0x29, 0xc0, 0x87, 0x9b,
+        0x00, 0x4c, 0x09, 0xf2, 0x08, 0x48, 0x00, 0x5c, 0x04, 0xe0, 0x08, 0x74,
+        0xf4, 0xe0, 0x75, 0x12, 0xa7, 0x46, 0xe1, 0x0f, 0x3c, 0xc4, 0x99, 0xa1,
+        0x80, 0x4e, 0x00, 0x5a, 0x40, 0xee, 0x19, 0x73, 0x04, 0x40, 0x60, 0x70,
+        0xa8, 0x46, 0xe1, 0x0f, 0x00, 0xc0, 0x99, 0xa1, 0x76, 0x4e, 0x00, 0x5a,
+        0x02, 0x40, 0x00, 0x00, 0x80, 0xe0, 0x19, 0x73, 0x26, 0x60, 0x00, 0x10,
+        0x05, 0xc0, 0x60, 0x70, 0x98, 0x4e, 0x00, 0x5a, 0x03, 0x40, 0x00, 0x00,
+        0x00, 0xe0, 0x19, 0x73, 0x06, 0xd9, 0x00, 0xf3, 0x90, 0x4e, 0x00, 0x5a,
+        0x03, 0x40, 0x00, 0x00, 0x40, 0xe0, 0x19, 0x73, 0x07, 0xd9, 0x00, 0xf3,
+        0xe5, 0x7f, 0xe5, 0xbf, 0x28, 0x40, 0x86, 0x9b, 0x29, 0xc0, 0x87, 0x9b,
+        0x00, 0x4c, 0x09, 0xf2, 0x08, 0x48, 0x00, 0x5c, 0x04, 0xe0, 0x08, 0x74,
+        0xf4, 0xe0, 0x75, 0x12, 0xa8, 0x46, 0xe1, 0x0f, 0x00, 0xc4, 0x99, 0xa1,
+        0x4a, 0x4e, 0x00, 0x5a, 0x20, 0xee, 0x19, 0x73, 0x04, 0x40, 0x60, 0x70,
+        0xa8, 0x46, 0xe1, 0x0f, 0x04, 0xc0, 0x99, 0xa1, 0x40, 0x4e, 0x00, 0x5a,
+        0x02, 0x40, 0x00, 0x00, 0x60, 0xe0, 0x19, 0x73, 0x26, 0x60, 0x00, 0x10,
+        0x05, 0xc0, 0x60, 0x70, 0x62, 0x4e, 0x00, 0x5a, 0x02, 0x40, 0x00, 0x00,
+        0xe0, 0xe7, 0x19, 0x73, 0x06, 0xd9, 0x00, 0xf3, 0x5a, 0x4e, 0x00, 0x5a,
+        0x03, 0x40, 0x00, 0x00, 0x20, 0xe0, 0x19, 0x73, 0x07, 0xd9, 0x00, 0xf3,
+        0xe5, 0x7f, 0xe5, 0xbf, 0x28, 0x40, 0x86, 0x9b, 0x29, 0xc0, 0x87, 0x9b,
+        0x00, 0x4c, 0x09, 0xf2, 0x08, 0x48, 0x00, 0x5c, 0x04, 0xe0, 0x08, 0x74,
+        0xf4, 0xe0, 0x75, 0x12, 0xa8, 0x46, 0xe1, 0x0f, 0x04, 0xc4, 0x99, 0xa1,
+        0xa7, 0x46, 0xe1, 0x0f, 0x00, 0xc7, 0x99, 0x91, 0x3c, 0xc0, 0x00, 0x67,
+        0xa8, 0x46, 0xe1, 0x0f, 0x80, 0xc0, 0x99, 0x91, 0x20, 0xd5, 0xc0, 0x8c,
+        0x3f, 0xc0, 0x00, 0x67, 0xa8, 0x46, 0xe1, 0x0f, 0x00, 0xc0, 0x99, 0x91,
+        0x3e, 0xc0, 0x00, 0x67
+    ];
+
+    let mut offs = 0;
+    let decoder = yaxpeax_hexagon::InstDecoder::default();
+    while offs < BYTES.len() {
+        let inst = decoder.decode(&mut yaxpeax_arch::U8Reader::new(&BYTES[offs..]));
+        match inst {
+            Ok(inst) => {
+                println!("{:04x}: {}", offs, inst);
+                offs += inst.len().to_const().to_linear();
+            },
+            Err(e) => {
+                println!("{:04x}: {}", offs, e);
+                println!("{:04x}: {:#x?}", offs, &BYTES[offs..][..4]);
+                offs += 4;
+            }
+        }
+    }
+}