From 6a9170db63f70be95adc2c80c342ed713a4546e7 Mon Sep 17 00:00:00 2001
From: iximeow <me@iximeow.net>
Date: Sun, 17 Mar 2024 10:41:03 -0700
Subject: armv8 no-panic test is now multithreaded

---
 tests/test.rs | 40 +++++++++++++++++++++++++++++++++-------
 1 file changed, 33 insertions(+), 7 deletions(-)

(limited to 'tests')

diff --git a/tests/test.rs b/tests/test.rs
index 7311616..5007464 100644
--- a/tests/test.rs
+++ b/tests/test.rs
@@ -6,6 +6,7 @@ mod armv7;
 mod armv8;
 
 use yaxpeax_arch::{Arch, Decoder, U8Reader};
+use std::fmt::Write;
 
 #[test]
 #[ignore]
@@ -36,17 +37,42 @@ fn test_armv7_thumb_does_not_panic() {
         }
     }
 }
+
 #[test]
 #[ignore]
 fn test_armv8_does_not_panic() {
-    let armv8 = <yaxpeax_arm::armv8::a64::ARMv8 as Arch>::Decoder::default();
+    fn test_range(start: u64, end: u64) {
+        let armv8 = <yaxpeax_arm::armv8::a64::ARMv8 as Arch>::Decoder::default();
 
-    for i in 0..=u32::MAX {
-        let bytes = i.to_le_bytes();
-        let res = armv8.decode(&mut U8Reader::new(&bytes));
-        if let Ok(instr) = res {
-            let s = instr.to_string();
-            drop(s);
+        let mut instr = <yaxpeax_arm::armv8::a64::ARMv8 as yaxpeax_arch::Arch>::Instruction::default();
+        let mut s = String::new();
+
+        for i in start..=end {
+            if i & 0x01_ff_ff_ff == 0 {
+                eprintln!("case {:08x}", i);
+            }
+            let i = i as u32;
+            let bytes = i.to_le_bytes();
+            let res = armv8.decode_into(&mut instr, &mut U8Reader::new(&bytes));
+            if let Ok(()) = res {
+                s.clear();
+                write!(s, "{}", instr).unwrap();
+            }
         }
     }
+
+    const NR_THREADS: u64 = 512;
+
+    const RANGE_SIZE: u64 = (u32::MAX as u64 + 1) / NR_THREADS;
+
+    let mut handles = Vec::new();
+
+    for i in 0..NR_THREADS {
+        let handle = std::thread::spawn(move || test_range(i * RANGE_SIZE, (i + 1) * RANGE_SIZE));
+        handles.push(handle);
+    }
+
+    while let Some(handle) = handles.pop() {
+        handle.join().unwrap();
+    }
 }
-- 
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