Add x86_64-asan-windows-msvc tier 3 target

compiler/rustc_target/src/spec/mod.rs

@@ -1800,6 +1800,8 @@ supported_targets! {
     ("x86_64-lynx-lynxos178", x86_64_lynx_lynxos178),
 
     ("x86_64-pc-cygwin", x86_64_pc_cygwin),
+
+    ("x86_64-asan-windows-msvc", x86_64_asan_windows_msvc),
 }
 
 /// Cow-Vec-Str: Cow<'static, [Cow<'static, str>]>

compiler/rustc_target/src/spec/targets/x86_64_asan_windows_msvc.rs

@@ -0,0 +1,16 @@
+use crate::spec::{SanitizerSet, Target, TargetMetadata};
+
+pub(crate) fn target() -> Target {
+    let mut base = super::x86_64_pc_windows_msvc::target();
+    base.metadata = TargetMetadata {
+        description: Some("64-bit Windows with ASAN enabled by default".into()),
+        tier: Some(3),
+        host_tools: Some(false),
+        std: Some(true),
+    };
+    base.options.default_sanitizers = SanitizerSet::ADDRESS;
+
+    assert!(base.options.default_sanitizers.contains(SanitizerSet::ADDRESS));
+
+    base
+}

src/bootstrap/src/core/sanity.rs

@@ -42,6 +42,7 @@ const STAGE0_MISSING_TARGETS: &[&str] = &[
     // just a dummy comment so the list doesn't get onelined
     "riscv64gc-unknown-redox",
     "hexagon-unknown-qurt",
+    "x86_64-asan-windows-msvc",
 ];
 
 /// Minimum version threshold for libstdc++ required when using prebuilt LLVM

src/doc/rustc/src/SUMMARY.md

@@ -146,6 +146,7 @@
     - [windows-gnullvm](platform-support/windows-gnullvm.md)
     - [\*-win7-windows-gnu](platform-support/win7-windows-gnu.md)
     - [\*-win7-windows-msvc](platform-support/win7-windows-msvc.md)
+    - [x86_64-asan-windows-msvc](platform-support/x86_64-asan-windows-msvc.md)
     - [x86_64-fortanix-unknown-sgx](platform-support/x86_64-fortanix-unknown-sgx.md)
     - [x86_64-pc-cygwin](platform-support/x86_64-pc-cygwin.md)
     - [x86_64-unknown-linux-none](platform-support/x86_64-unknown-linux-none.md)

src/doc/rustc/src/platform-support.md

@@ -425,6 +425,7 @@ target | std | host | notes
 [`wasm32-wasip3`](platform-support/wasm32-wasip3.md) | ✓ | WebAssembly with WASIp3
 [`x86_64-apple-tvos`](platform-support/apple-tvos.md) | ✓ |  | x86 64-bit tvOS
 [`x86_64-apple-watchos-sim`](platform-support/apple-watchos.md) | ✓ |  | x86 64-bit Apple WatchOS simulator
+[`x86_64-asan-windows-msvc`](platform-support/x86_64-asan-windows-msvc.md) | ✓ |  | x86 64-bit Windows with AddressSanitizer
 [`x86_64-lynx-lynxos178`](platform-support/lynxos178.md) |   |  | x86_64 LynxOS-178
 [`x86_64-pc-cygwin`](platform-support/x86_64-pc-cygwin.md) | ✓ |  | 64-bit x86 Cygwin |
 [`x86_64-pc-nto-qnx710`](platform-support/nto-qnx.md) | ✓ |  | x86 64-bit QNX Neutrino 7.1 RTOS with default network stack (io-pkt) |

src/doc/rustc/src/platform-support/x86_64-asan-windows-msvc.md

@@ -0,0 +1,59 @@
+# `x86_64-asan-windows-msvc`
+
+**Tier: 3**
+
+Target mirrors `x86_64-pc-windows-msvc` with AddressSanitizer enabled by default.
+
+## Target maintainers
+
+[@ChrisDenton](https://github.com/ChrisDenton)
+[@dpaoliello](https://github.com/dpaoliello)
+[@eholk](https://github.com/eholk)
+[@Fulgen301](https://github.com/Fulgen301)
+[@lambdageek](https://github.com/lambdageek)
+[@sivadeilra](https://github.com/sivadeilra)
+[@wesleywiser](https://github.com/wesleywiser)
+
+## Requirements
+
+This target is for cross-compilation only. Host tools are not supported because
+this target's primary use cases do not require the host tools to be instrumented
+with AddressSanitizer. The standard library is fully supported.
+
+In all other aspects, this target is identical to `x86_64-pc-windows-msvc`.
+
+## Building the target
+
+This target can be built by adding it to the `target` list in `bootstrap.toml`.
+
+```toml
+[build]
+target = ["x86_64-asan-windows-msvc"]
+```
+
+## Building Rust programs
+
+Rust does not yet ship pre-compiled artifacts for this target. To compile for
+this target, you will either need to build Rust with the target enabled (see
+"Building the target" above), or build your own copy of `core` by using
+`build-std` or similar.
+
+Compilation can be done with:
+
+```sh
+rustc --target x86_64-asan-windows-msvc my_program.rs
+```
+
+## Testing
+
+Programs compiled for this target require `clang_rt.asan_dynamic-x86_64.dll` to
+be available. This can be installed by using the Visual Studio Installer to
+install the C++ AddressSanitizer component. Once installed, add the directory
+containing the DLL to your `PATH` or run your program from a Visual Studio
+Developer Command Prompt.
+
+## Cross-compilation toolchains and C code
+
+Architectural cross-compilation from one Windows host to a different Windows
+platform is natively supported by the MSVC toolchain provided the appropriate
+components are selected when using the VS Installer.

tests/assembly-llvm/targets/targets-pe.rs

@@ -67,6 +67,9 @@
 //@ revisions: x86_64_pc_windows_msvc
 //@ [x86_64_pc_windows_msvc] compile-flags: --target x86_64-pc-windows-msvc
 //@ [x86_64_pc_windows_msvc] needs-llvm-components: x86
+//@ revisions: x86_64_asan_windows_msvc
+//@ [x86_64_asan_windows_msvc] compile-flags: --target x86_64-asan-windows-msvc
+//@ [x86_64_asan_windows_msvc] needs-llvm-components: x86
 //@ revisions: x86_64_unknown_uefi
 //@ [x86_64_unknown_uefi] compile-flags: --target x86_64-unknown-uefi
 //@ [x86_64_unknown_uefi] needs-llvm-components: x86