Add basic raw_dylib test

Author: simonbuchan

build_system/tests.rs

@@ -97,6 +97,7 @@ const BASE_SYSROOT_SUITE: &[TestCase] = &[
     ),
     TestCase::build_bin_and_run("aot.float-minmax-pass", "example/float-minmax-pass.rs", &[]),
     TestCase::build_bin_and_run("aot.mod_bench", "example/mod_bench.rs", &[]),
+    TestCase::build_bin_and_run("aot.raw_dylib", "example/raw-dylib.rs", &[]),
     TestCase::build_bin_and_run("aot.issue-72793", "example/issue-72793.rs", &[]),
     TestCase::build_bin("aot.issue-59326", "example/issue-59326.rs"),
 ];

config.txt

@@ -40,6 +40,7 @@ aot.subslice-patterns-const-eval
 aot.track-caller-attribute
 aot.float-minmax-pass
 aot.mod_bench
+aot.raw_dylib
 aot.issue-72793
 aot.issue-59326
 

example/raw-dylib.rs

@@ -0,0 +1,42 @@
+fn main() {
+    #[cfg(all(target_arch = "x86_64", target_os = "windows", target_env = "msvc"))]
+    x86_64_pc_windows_msvc::test();
+}
+
+#[cfg(all(target_arch = "x86_64", target_os = "windows", target_env = "msvc"))]
+mod x86_64_pc_windows_msvc {
+    #![allow(clippy::upper_case_acronyms)]
+
+    // Expanded windows_sys, with --cfg windows_raw_dylib, on not(target_arch = "x86").
+    //
+    // With target_arch = "x86", #[link] needs import_name_type = "undecorated" for windows APIs for
+    // windows APIs - and the extern abi depends on the specific API.
+
+    // use windows_sys::core::PWSTR;
+    // use windows_sys::{Win32::Foundation::*, Win32::UI::WindowsAndMessaging::*};
+    type PWSTR = *mut u16;
+    type BOOL = i32;
+    type HWND = isize;
+    type LPARAM = isize;
+    type WNDENUMPROC = Option<unsafe extern "system" fn(hwnd: HWND, param: LPARAM) -> BOOL>;
+
+    #[link(name = "user32.dll", kind = "raw-dylib", modifiers = "+verbatim")]
+    extern "system" {
+        fn EnumWindows(lpenumfunc: WNDENUMPROC, lparam: LPARAM) -> BOOL;
+
+        fn GetWindowTextW(hwnd: HWND, buf: PWSTR, buflen: i32) -> i32;
+    }
+
+    pub fn test() {
+        unsafe { EnumWindows(Some(enum_window), 0) };
+    }
+
+    extern "system" fn enum_window(window: HWND, _: LPARAM) -> BOOL {
+        let mut text: [u16; 512] = [0; 512];
+
+        let len = unsafe { GetWindowTextW(window, text.as_mut_ptr(), text.len() as i32) };
+        let text = String::from_utf16_lossy(&text[..len as usize]);
+
+        1 // TRUE
+    }
+}