Rollup merge of #68291 - tmiasko:sanitizer-tests, r=nikomatsakis

Update sanitizer tests

* Move tests from src/test/run-make-fulldeps to src/test/ui.
* Fix memory sanitizer test to detect the intended issue rather than
  an unrelated one caused by the use of an uninstrumented std.

Author: tmandry

src/test/run-make-fulldeps/sanitizer-address/Makefile

@@ -0,0 +1,21 @@
+// needs-sanitizer-support
+// only-x86_64
+//
+// compile-flags: -Z sanitizer=address -O
+//
+// run-fail
+// error-pattern: AddressSanitizer: stack-buffer-overflow
+// error-pattern: 'xs' <== Memory access at offset
+
+#![feature(test)]
+
+use std::hint::black_box;
+use std::mem;
+
+fn main() {
+    let xs = [0, 1, 2, 3];
+    // Avoid optimizing everything out.
+    let xs = black_box(xs.as_ptr());
+    let code = unsafe { *xs.offset(4) };
+    std::process::exit(code);
+}

src/test/run-make-fulldeps/sanitizer-address/overflow.rs

@@ -1,3 +1,11 @@
+// needs-sanitizer-support
+// only-x86_64
+//
+// compile-flags: -Z sanitizer=leak -O
+//
+// run-fail
+// error-pattern: LeakSanitizer: detected memory leaks
+
 #![feature(test)]
 
 use std::hint::black_box;

src/test/run-make-fulldeps/sanitizer-invalid-target/Makefile

@@ -0,0 +1,44 @@
+// needs-sanitizer-support
+// only-linux
+// only-x86_64
+//
+// compile-flags: -Z sanitizer=memory -Zsanitizer-memory-track-origins -O
+//
+// run-fail
+// error-pattern: MemorySanitizer: use-of-uninitialized-value
+// error-pattern: Uninitialized value was created by an allocation
+// error-pattern: in the stack frame of function 'random'
+//
+// This test case intentionally limits the usage of the std,
+// since it will be linked with an uninstrumented version of it.
+
+#![feature(core_intrinsics)]
+#![feature(start)]
+#![feature(test)]
+
+use std::hint::black_box;
+use std::mem::MaybeUninit;
+
+#[inline(never)]
+#[no_mangle]
+fn random() -> [isize; 32] {
+    let r = unsafe { MaybeUninit::uninit().assume_init() };
+    // Avoid optimizing everything out.
+    black_box(r)
+}
+
+#[inline(never)]
+#[no_mangle]
+fn xor(a: &[isize]) -> isize {
+    let mut s = 0;
+    for i in 0..a.len() {
+        s = s ^ a[i];
+    }
+    s
+}
+
+#[start]
+fn main(_: isize, _: *const *const u8) -> isize {
+    let r = random();
+    xor(&r)
+}

src/test/run-make-fulldeps/sanitizer-invalid-target/hello.rs

@@ -0,0 +1,7 @@
+// ignore-tidy-linelength
+// compile-flags: -Z sanitizer=leak --target i686-unknown-linux-gnu
+// error-pattern: error: LeakSanitizer only works with the `x86_64-unknown-linux-gnu` or `x86_64-apple-darwin` target
+
+#![feature(no_core)]
+#![no_core]
+#![no_main]

src/test/run-make-fulldeps/sanitizer-leak/Makefile

@@ -0,0 +1,4 @@
+error: LeakSanitizer only works with the `x86_64-unknown-linux-gnu` or `x86_64-apple-darwin` target
+
+error: aborting due to previous error
+