Rollup merge of #68164 - tmiasko:no-sanitize, r=nikomatsakis

Selectively disable sanitizer instrumentation

Add `no_sanitize` attribute that allows to opt out from sanitizer
instrumentation in an annotated function.

src/test/ui/feature-gates/feature-gate-no_sanitize.rs

@@ -0,0 +1,4 @@
+#[no_sanitize(address)]
+//~^ the `#[no_sanitize]` attribute is an experimental feature
+fn main() {
+}

src/test/ui/feature-gates/feature-gate-no_sanitize.stderr

@@ -0,0 +1,12 @@
+error[E0658]: the `#[no_sanitize]` attribute is an experimental feature
+  --> $DIR/feature-gate-no_sanitize.rs:1:1
+   |
+LL | #[no_sanitize(address)]
+   | ^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: for more information, see https://github.com/rust-lang/rust/issues/39699
+   = help: add `#![feature(no_sanitize)]` to the crate attributes to enable
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0658`.

src/test/ui/invalid/invalid-no-sanitize.rs

@@ -0,0 +1,5 @@
+#![feature(no_sanitize)]
+
+#[no_sanitize(brontosaurus)] //~ ERROR invalid argument
+fn main() {
+}

src/test/ui/invalid/invalid-no-sanitize.stderr

@@ -0,0 +1,10 @@
+error: invalid argument for `no_sanitize`
+  --> $DIR/invalid-no-sanitize.rs:3:15
+   |
+LL | #[no_sanitize(brontosaurus)]
+   |               ^^^^^^^^^^^^
+   |
+   = note: expected one of: `address`, `memory` or `thread`
+
+error: aborting due to previous error
+

src/test/ui/sanitize-inline-always.rs

@@ -0,0 +1,15 @@
+// check-pass
+
+#![feature(no_sanitize)]
+
+#[inline(always)]
+//~^ NOTE inlining requested here
+#[no_sanitize(address)]
+//~^ WARN will have no effect after inlining
+//~| NOTE on by default
+fn x() {
+}
+
+fn main() {
+    x()
+}

src/test/ui/sanitize-inline-always.stderr

@@ -0,0 +1,13 @@
+warning: `no_sanitize` will have no effect after inlining
+  --> $DIR/sanitize-inline-always.rs:7:1
+   |
+LL | #[no_sanitize(address)]
+   | ^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: `#[warn(inline_no_sanitize)]` on by default
+note: inlining requested here
+  --> $DIR/sanitize-inline-always.rs:5:1
+   |
+LL | #[inline(always)]
+   | ^^^^^^^^^^^^^^^^^
+