Rollup of 5 pull requests

library/panic_abort/src/lib.rs

@@ -116,6 +116,19 @@ pub mod personalities {
     )))]
     pub extern "C" fn rust_eh_personality() {}
 
+    // On *-pc-windows-msvc we need such a symbol to make linker happy.
+    #[allow(non_snake_case)]
+    #[no_mangle]
+    #[cfg(all(target_os = "windows", target_env = "msvc"))]
+    pub extern "C" fn __CxxFrameHandler3(
+        _record: usize,
+        _frame: usize,
+        _context: usize,
+        _dispatcher: usize,
+    ) -> u32 {
+        1
+    }
+
     // On x86_64-pc-windows-gnu we use our own personality function that needs
     // to return `ExceptionContinueSearch` as we're passing on all our frames.
     #[rustc_std_internal_symbol]

src/test/ui/panic-runtime/abort-link-to-unwind-msvc-no-std-link-to-libcmt.rs

@@ -0,0 +1,32 @@
+// build-pass
+// compile-flags: -C panic=abort -C target-feature=+crt-static
+// aux-build:exit-success-if-unwind-msvc-no-std.rs
+// only-msvc
+// Test that `no_std` with `panic=abort` under MSVC toolchain
+// doesn't cause error when linking to libcmt.
+// We don't run this executable because it will hang in `rust_begin_unwind`
+
+#![no_std]
+#![no_main]
+
+extern crate exit_success_if_unwind_msvc_no_std;
+
+use core::panic::PanicInfo;
+
+#[panic_handler]
+fn handle_panic(_: &PanicInfo) -> ! {
+    loop {}
+}
+
+#[link(name = "libcmt")]
+extern "C" {}
+
+#[no_mangle]
+pub extern "C" fn main() -> i32 {
+    exit_success_if_unwind_msvc_no_std::bar(do_panic);
+    0
+}
+
+fn do_panic() {
+    panic!();
+}

src/test/ui/panic-runtime/abort-link-to-unwind-msvc-no-std-link-to-msvcrt.rs

@@ -0,0 +1,32 @@
+// build-pass
+// compile-flags: -C panic=abort
+// aux-build:exit-success-if-unwind-msvc-no-std.rs
+// only-msvc
+// Test that `no_std` with `panic=abort` under MSVC toolchain
+// doesn't cause error when linking to msvcrt.
+// We don't run this executable because it will hang in `rust_begin_unwind`
+
+#![no_std]
+#![no_main]
+
+extern crate exit_success_if_unwind_msvc_no_std;
+
+use core::panic::PanicInfo;
+
+#[panic_handler]
+fn handle_panic(_: &PanicInfo) -> ! {
+    loop {}
+}
+
+#[link(name = "msvcrt")]
+extern "C" {}
+
+#[no_mangle]
+pub extern "C" fn main() -> i32 {
+    exit_success_if_unwind_msvc_no_std::bar(do_panic);
+    0
+}
+
+fn do_panic() {
+    panic!();
+}

src/test/ui/panic-runtime/abort-link-to-unwind-msvc-no-std.rs

@@ -0,0 +1,54 @@
+// build-pass
+// compile-flags:-C panic=abort
+// aux-build:exit-success-if-unwind-msvc-no-std.rs
+// no-prefer-dynamic
+// only-msvc
+// We don't run this executable because it will hang in `rust_begin_unwind`
+
+#![no_std]
+#![no_main]
+#![windows_subsystem = "console"]
+#![feature(panic_abort)]
+
+extern crate exit_success_if_unwind_msvc_no_std;
+extern crate panic_abort;
+
+use core::panic::PanicInfo;
+
+#[panic_handler]
+fn handle_panic(_: &PanicInfo) -> ! {
+    loop {}
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn memcpy(dest: *mut u8, _src: *const u8, _n: usize) -> *mut u8 {
+    dest
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn memmove(dest: *mut u8, _src: *const u8, _n: usize) -> *mut u8 {
+    dest
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn memset(mem: *mut u8, _val: i32, _n: usize) -> *mut u8 {
+    mem
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn memcmp(_mem1: *const u8, _mem2: *const u8, _n: usize) -> i32 {
+    0
+}
+
+#[no_mangle]
+#[used]
+static _fltused: i32 = 0;
+
+#[no_mangle]
+pub extern "C" fn mainCRTStartup() {
+    exit_success_if_unwind_msvc_no_std::bar(main);
+}
+
+fn main() {
+    panic!();
+}

src/test/ui/panic-runtime/auxiliary/exit-success-if-unwind-msvc-no-std.rs

@@ -0,0 +1,24 @@
+// compile-flags:-C panic=unwind
+// no-prefer-dynamic
+
+#![no_std]
+#![crate_type = "rlib"]
+
+struct Bomb;
+
+impl Drop for Bomb {
+    fn drop(&mut self) {
+        #[link(name = "kernel32")]
+        extern "C" {
+            fn ExitProcess(code: u32) -> !;
+        }
+        unsafe {
+            ExitProcess(0);
+        }
+    }
+}
+
+pub fn bar(f: fn()) {
+    let _bomb = Bomb;
+    f();
+}

src/test/ui/panic-runtime/unwind-msvc-no-std-link-to-libcmt.rs

@@ -0,0 +1,47 @@
+// build-pass
+// compile-flags: -C panic=unwind -C target-feature=+crt-static
+// only-msvc
+// Test that `no_std` with `panic=unwind` under MSVC toolchain
+// doesn't cause error when linking to libcmt.
+
+#![no_std]
+#![no_main]
+#![feature(alloc_error_handler)]
+#![feature(panic_unwind)]
+
+use core::alloc::{GlobalAlloc, Layout};
+
+struct DummyAllocator;
+
+unsafe impl GlobalAlloc for DummyAllocator {
+    unsafe fn alloc(&self, _layout: Layout) -> *mut u8 {
+        core::ptr::null_mut()
+    }
+
+    unsafe fn dealloc(&self, _ptr: *mut u8, _layout: Layout) {}
+}
+
+#[global_allocator]
+static ALLOC: DummyAllocator = DummyAllocator;
+
+#[alloc_error_handler]
+fn rust_oom(_layout: Layout) -> ! {
+    panic!()
+}
+
+extern crate panic_unwind;
+
+use core::panic::PanicInfo;
+
+#[panic_handler]
+fn handle_panic(_: &PanicInfo) -> ! {
+    loop {}
+}
+
+#[link(name = "libcmt")]
+extern "C" {}
+
+#[no_mangle]
+pub extern "C" fn main() -> i32 {
+    panic!();
+}

src/test/ui/panic-runtime/unwind-msvc-no-std-link-to-msvcrt.rs

@@ -0,0 +1,47 @@
+// build-pass
+// compile-flags: -C panic=unwind
+// only-msvc
+// Test that `no_std` with `panic=unwind` under MSVC toolchain
+// doesn't cause error when linking to msvcrt.
+
+#![no_std]
+#![no_main]
+#![feature(alloc_error_handler)]
+#![feature(panic_unwind)]
+
+use core::alloc::{GlobalAlloc, Layout};
+
+struct DummyAllocator;
+
+unsafe impl GlobalAlloc for DummyAllocator {
+    unsafe fn alloc(&self, _layout: Layout) -> *mut u8 {
+        core::ptr::null_mut()
+    }
+
+    unsafe fn dealloc(&self, _ptr: *mut u8, _layout: Layout) {}
+}
+
+#[global_allocator]
+static ALLOC: DummyAllocator = DummyAllocator;
+
+#[alloc_error_handler]
+fn rust_oom(_layout: Layout) -> ! {
+    panic!()
+}
+
+extern crate panic_unwind;
+
+use core::panic::PanicInfo;
+
+#[panic_handler]
+fn handle_panic(_: &PanicInfo) -> ! {
+    loop {}
+}
+
+#[link(name = "msvcrt")]
+extern "C" {}
+
+#[no_mangle]
+pub extern "C" fn main() -> i32 {
+    panic!();
+}