[PATCH v1 2/3] RustPkg/Test/TestRustLangLib: Fix Building

["Ayush Singh" <ayushdevel1325@gmail.com>]

From: Ayush Singh <ayushsingh1325@gmail.com>

Removed the Alloc trait usage which seems to have been removed from
Rust now.

Cc: Jiewen Yao <jiewen.yao@intel.com>

Signed-off-by: Ayush Singh <ayushdevel1325@gmail.com>
---
 RustPkg/Library/UefiRustAllocationLib/src/lib.rs |  53 ++--
 RustPkg/Test/TestRustLangLib/.cargo/config.toml  |   3 +
 RustPkg/Test/TestRustLangLib/src/lib.rs          | 264 ++++++++------------
 3 files changed, 137 insertions(+), 183 deletions(-)

diff --git a/RustPkg/Library/UefiRustAllocationLib/src/lib.rs b/RustPkg/Library/UefiRustAllocationLib/src/lib.rs
index f369e1bb170b..6a65f0a5f988 100644
--- a/RustPkg/Library/UefiRustAllocationLib/src/lib.rs
+++ b/RustPkg/Library/UefiRustAllocationLib/src/lib.rs
@@ -15,44 +15,42 @@
 #![feature(alloc_layout_extra)]
 #![feature(allocator_api)]
 #![feature(alloc_error_handler)]
-
 #![cfg_attr(not(test), no_std)]
-
 #![allow(unused)]
 
 extern crate uefi_rust_panic_lib;
 
-use core::alloc::{GlobalAlloc, Layout, Alloc};
-use r_efi::efi;
-use r_efi::efi::{Status};
+use core::alloc::{GlobalAlloc, Layout};
 use core::ffi::c_void;
+use r_efi::efi;
+use r_efi::efi::Status;
 
 pub struct MyAllocator;
 
-static mut ST : *mut efi::SystemTable = core::ptr::null_mut();
-static mut BS : *mut efi::BootServices = core::ptr::null_mut();
+static mut ST: *mut efi::SystemTable = core::ptr::null_mut();
+static mut BS: *mut efi::BootServices = core::ptr::null_mut();
 
 unsafe impl GlobalAlloc for MyAllocator {
     unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
-      let size = layout.size();
-      let align = layout.align();
-      if align > 8 {
-        return core::ptr::null_mut();
-      }
+        let size = layout.size();
+        let align = layout.align();
+        if align > 8 {
+            return core::ptr::null_mut();
+        }
 
-      let mut address : *mut c_void = core::ptr::null_mut();
-      let status = ((*BS).allocate_pool) (
-                     efi::MemoryType::BootServicesData,
-                     size,
-                     &mut address as *mut *mut c_void
-                     );
-      if status != Status::SUCCESS {
-        return core::ptr::null_mut();
-      }
-      address as *mut u8
+        let mut address: *mut c_void = core::ptr::null_mut();
+        let status = ((*BS).allocate_pool)(
+            efi::MemoryType::BootServicesData,
+            size,
+            &mut address as *mut *mut c_void,
+        );
+        if status != Status::SUCCESS {
+            return core::ptr::null_mut();
+        }
+        address as *mut u8
     }
     unsafe fn dealloc(&self, ptr: *mut u8, _layout: Layout) {
-      ((*BS).free_pool) (ptr as *mut c_void);
+        ((*BS).free_pool)(ptr as *mut c_void);
     }
 }
 
@@ -60,14 +58,13 @@ unsafe impl GlobalAlloc for MyAllocator {
 static ALLOCATOR: MyAllocator = MyAllocator;
 
 #[alloc_error_handler]
-fn alloc_error_handler(layout: core::alloc::Layout) -> !
-{
+fn alloc_error_handler(layout: core::alloc::Layout) -> ! {
     loop {}
 }
 
-pub extern fn init(system_table: *mut efi::SystemTable) {
+pub extern "C" fn init(system_table: *mut efi::SystemTable) {
     unsafe {
-      ST = system_table;
-      BS = (*ST).boot_services;
+        ST = system_table;
+        BS = (*ST).boot_services;
     }
 }
diff --git a/RustPkg/Test/TestRustLangLib/.cargo/config.toml b/RustPkg/Test/TestRustLangLib/.cargo/config.toml
new file mode 100644
index 000000000000..422bf9d2ab4e
--- /dev/null
+++ b/RustPkg/Test/TestRustLangLib/.cargo/config.toml
@@ -0,0 +1,3 @@
+[unstable]
+build-std = ["core", "compiler_builtins", "alloc"]
+build-std-features = ["compiler-builtins-mem"]
diff --git a/RustPkg/Test/TestRustLangLib/src/lib.rs b/RustPkg/Test/TestRustLangLib/src/lib.rs
index ee3a0d7cc83e..888733232b71 100644
--- a/RustPkg/Test/TestRustLangLib/src/lib.rs
+++ b/RustPkg/Test/TestRustLangLib/src/lib.rs
@@ -14,24 +14,22 @@
 
 #![feature(alloc_layout_extra)]
 #![feature(allocator_api)]
-#![feature(core_panic_info)]
-
+#![feature(slice_ptr_get)]
 #![cfg_attr(not(test), no_std)]
-
 #![allow(unused)]
 
 mod mem;
 
 use r_efi::efi;
-use r_efi::efi::{Status};
+use r_efi::efi::Status;
 
-extern {
-  fn AllocatePool (Size: usize) -> *mut c_void;
-  fn FreePool (Buffer: *mut c_void);
+extern "C" {
+    fn AllocatePool(Size: usize) -> *mut c_void;
+    fn FreePool(Buffer: *mut c_void);
 }
 
-use core::panic::PanicInfo;
 use core::ffi::c_void;
+use core::panic::PanicInfo;
 
 use core::mem::size_of;
 use core::mem::transmute;
@@ -40,30 +38,22 @@ use core::slice;
 use core::slice::from_raw_parts;
 use core::slice::from_raw_parts_mut;
 
-extern crate uefi_rust_panic_lib;
 extern crate uefi_rust_allocation_lib;
+extern crate uefi_rust_panic_lib;
 
 extern crate alloc;
 
-use alloc::vec::Vec;
+use alloc::alloc::{handle_alloc_error, Allocator, Global, Layout};
 use alloc::boxed::Box;
-use alloc::{
-    alloc::{handle_alloc_error, Alloc, Global, Layout},
-};
-
+use alloc::vec::Vec;
 
 #[no_mangle]
 #[export_name = "TestIntegerOverflow"]
-pub extern fn test_integer_overflow (
-    buffer_size: usize,
-    width : u32,
-    height : u32,
-    ) -> Status
-{
+pub extern "C" fn test_integer_overflow(buffer_size: usize, width: u32, height: u32) -> Status {
     let data_size = width * height * 4;
 
     if data_size as usize > buffer_size {
-      return Status::UNSUPPORTED;
+        return Status::UNSUPPORTED;
     }
 
     Status::SUCCESS
@@ -71,26 +61,24 @@ pub extern fn test_integer_overflow (
 
 #[no_mangle]
 #[export_name = "TestIntegerCheckedOverflow"]
-pub extern fn test_integer_checked_overflow (
+pub extern "C" fn test_integer_checked_overflow(
     buffer_size: usize,
-    width : u32,
-    height : u32,
-    ) -> Status
-{
-
+    width: u32,
+    height: u32,
+) -> Status {
     let mut data_size: u32 = 0;
 
     match width.checked_mul(height) {
-      Some(size) => {data_size = size},
-      None => {return Status::INVALID_PARAMETER},
+        Some(size) => data_size = size,
+        None => return Status::INVALID_PARAMETER,
     }
     match data_size.checked_mul(4) {
-      Some(size) => {data_size = size},
-      None => {return Status::INVALID_PARAMETER},
+        Some(size) => data_size = size,
+        None => return Status::INVALID_PARAMETER,
     }
 
     if data_size as usize > buffer_size {
-      return Status::UNSUPPORTED;
+        return Status::UNSUPPORTED;
     }
 
     Status::SUCCESS
@@ -98,31 +86,27 @@ pub extern fn test_integer_checked_overflow (
 
 #[no_mangle]
 #[export_name = "TestIntegerCast"]
-pub extern fn test_integer_cast (
-    buffer_size: u64,
-    ) -> u32
-{
-    let data_size : u32 = buffer_size as u32;
+pub extern "C" fn test_integer_cast(buffer_size: u64) -> u32 {
+    let data_size: u32 = buffer_size as u32;
     data_size
 }
 
-extern {
-  fn ExternInit(Data: *mut usize);
+extern "C" {
+    fn ExternInit(Data: *mut usize);
 }
 
 #[no_mangle]
 #[export_name = "TestUninitializedVariable"]
-pub extern fn test_uninitializd_variable (
-    index: usize,
-    ) -> usize
-{
-    let mut data : usize = 1;
+pub extern "C" fn test_uninitializd_variable(index: usize) -> usize {
+    let mut data: usize = 1;
 
     if index > 10 {
-      data = 0;
+        data = 0;
     }
 
-    unsafe { ExternInit (&mut data ); }
+    unsafe {
+        ExternInit(&mut data);
+    }
 
     data = data + 1;
 
@@ -131,11 +115,8 @@ pub extern fn test_uninitializd_variable (
 
 #[no_mangle]
 #[export_name = "TestArrayOutOfRange"]
-pub extern fn test_array_out_of_range (
-    index: usize,
-    ) -> usize
-{
-    let mut data : [u8; 8] = [0; 8];
+pub extern "C" fn test_array_out_of_range(index: usize) -> usize {
+    let mut data: [u8; 8] = [0; 8];
 
     data[index] = 1;
 
@@ -152,18 +133,21 @@ pub struct TestTable {
 
 #[no_mangle]
 #[export_name = "TestBufferOverflow"]
-pub extern fn test_buffer_overflow (
+pub extern "C" fn test_buffer_overflow(
     buffer: &mut [u8; 0],
     buffer_size: usize,
     table: &TestTable,
     table_size: usize,
-    )
-{
-    let mut dest = crate::mem::MemoryRegion::new(buffer as *mut [u8; 0] as usize as u64, buffer_size as u64);
-    let mut source = crate::mem::MemoryRegion::new(&table.value as *const [u8; 0] as usize as u64, table_size as u64);
+) {
+    let mut dest =
+        crate::mem::MemoryRegion::new(buffer as *mut [u8; 0] as usize as u64, buffer_size as u64);
+    let mut source = crate::mem::MemoryRegion::new(
+        &table.value as *const [u8; 0] as usize as u64,
+        table_size as u64,
+    );
 
-    for index in 0_u64 .. table.length as u64 {
-      dest.write_u8(index, source.read_u8(index));
+    for index in 0_u64..table.length as u64 {
+        dest.write_u8(index, source.read_u8(index));
     }
 }
 
@@ -177,59 +161,49 @@ pub struct TestTableFixed {
 
 #[no_mangle]
 #[export_name = "TestBufferOverflowFixed"]
-pub extern fn test_buffer_overflow_fixed (
-    buffer: &mut [u8; 32],
-    table: &TestTableFixed,
-    )
-{
-    (*buffer)[0_usize..(table.length as usize)].copy_from_slice(
-      &table.value[0_usize..(table.length as usize)]
-      );
+pub extern "C" fn test_buffer_overflow_fixed(buffer: &mut [u8; 32], table: &TestTableFixed) {
+    (*buffer)[0_usize..(table.length as usize)]
+        .copy_from_slice(&table.value[0_usize..(table.length as usize)]);
 }
 
-fn get_buffer<'a> () -> Option<&'a mut TestTableFixed>
-{
-    let ptr : *mut c_void = unsafe { AllocatePool (size_of::<TestTableFixed>()) };
+fn get_buffer<'a>() -> Option<&'a mut TestTableFixed> {
+    let ptr: *mut c_void = unsafe { AllocatePool(size_of::<TestTableFixed>()) };
     if ptr.is_null() {
-      return None;
+        return None;
     }
-    let buffer : &mut TestTableFixed = unsafe { core::mem::transmute::<*mut c_void, &mut TestTableFixed>(ptr) };
+    let buffer: &mut TestTableFixed =
+        unsafe { core::mem::transmute::<*mut c_void, &mut TestTableFixed>(ptr) };
     Some(buffer)
 }
 
-fn release_buffer (test_table : &mut TestTableFixed)
-{
-  test_table.r#type = 0;
-  unsafe { FreePool (test_table as *mut TestTableFixed as *mut c_void) ; }
+fn release_buffer(test_table: &mut TestTableFixed) {
+    test_table.r#type = 0;
+    unsafe {
+        FreePool(test_table as *mut TestTableFixed as *mut c_void);
+    }
 }
 
 #[no_mangle]
 #[export_name = "TestBufferDrop"]
-pub extern fn test_buffer_drop (
-    
-    )
-{
-    match get_buffer () {
-      Some(buffer) => {
-        buffer.r#type = 1;
-        release_buffer(buffer);
-        drop (buffer); // This is required.
-        //buffer.r#type = 1; // error
-      },
-      None => {},
+pub extern "C" fn test_buffer_drop() {
+    match get_buffer() {
+        Some(buffer) => {
+            buffer.r#type = 1;
+            release_buffer(buffer);
+            drop(buffer); // This is required.
+                          //buffer.r#type = 1; // error
+        }
+        None => {}
     }
 }
 
 #[no_mangle]
 #[export_name = "TestBufferBorrow"]
-pub extern fn test_buffer_borrow (
-    test_table : &mut TestTableFixed
-    )
-{
-    let test_table2 : &mut TestTableFixed = test_table;
+pub extern "C" fn test_buffer_borrow(test_table: &mut TestTableFixed) {
+    let test_table2: &mut TestTableFixed = test_table;
     test_table2.r#type = 1;
 
-    let test_table3 : &mut [u8; 64] = &mut test_table.value;
+    let test_table3: &mut [u8; 64] = &mut test_table.value;
     test_table3[63] = 0;
 
     //test_table2.r#type = 2; // error
@@ -237,44 +211,38 @@ pub extern fn test_buffer_borrow (
 
 #[no_mangle]
 #[export_name = "TestBufferAlloc"]
-pub extern fn test_buffer_alloc (
-    
-    )
-{
+pub extern "C" fn test_buffer_alloc() {
     let layout = unsafe { core::alloc::Layout::from_size_align_unchecked(32, 4) };
     unsafe {
-      match Global.alloc (layout) {
-        Ok(buffer) => {
-          let mut box_buffer = Box::from_raw(from_raw_parts_mut(buffer.as_ptr(), layout.size()));
-          box_buffer[0] = 1;
-          Global.dealloc (buffer, layout);
-          drop (buffer); // It is useless
-          box_buffer[0] = 1; // cannot catch
-        },
-        Err(_) => handle_alloc_error (layout),
-      }
+        match Global.allocate(layout) {
+            Ok(mut buffer) => {
+                let mut box_buffer = Box::from_raw(buffer.as_mut());
+                box_buffer[0] = 1;
+                Global.deallocate(buffer.as_non_null_ptr(), layout);
+                drop(buffer); // It is useless
+                box_buffer[0] = 1; // cannot catch
+            }
+            Err(_) => handle_alloc_error(layout),
+        }
     }
 
     let layout = core::alloc::Layout::new::<u32>();
     unsafe {
-      match Global.alloc (layout) {
-        Ok(buffer) => {
-          Global.dealloc (buffer, layout);
-        },
-        Err(_) => handle_alloc_error (layout),
-      }
+        match Global.allocate(layout) {
+            Ok(buffer) => {
+                Global.deallocate(buffer.as_non_null_ptr(), layout);
+            }
+            Err(_) => handle_alloc_error(layout),
+        }
     }
 }
 
-fn get_box (
-    r#type: u32
-    ) -> Box<TestTableFixed>
-{
-    let mut a = Box::new(TestTableFixed{
-                       r#type: 0,
-                       length: size_of::<TestTableFixed>() as u32,
-                       value: [0; 64]
-                       }); // it will call __rust_alloc().
+fn get_box(r#type: u32) -> Box<TestTableFixed> {
+    let mut a = Box::new(TestTableFixed {
+        r#type: 0,
+        length: size_of::<TestTableFixed>() as u32,
+        value: [0; 64],
+    }); // it will call __rust_alloc().
     a.r#type = r#type;
 
     a
@@ -282,35 +250,26 @@ fn get_box (
 
 #[no_mangle]
 #[export_name = "TestBoxAlloc"]
-pub extern fn test_box_alloc (
-    r#type: u32
-    ) -> Box<TestTableFixed>
-{
-  let mut a = get_box(1);
+pub extern "C" fn test_box_alloc(r#type: u32) -> Box<TestTableFixed> {
+    let mut a = get_box(1);
 
-  a.r#type = r#type;
+    a.r#type = r#type;
 
-  //test_box_free(a); // build fail.
+    //test_box_free(a); // build fail.
 
-  let b = a;
-  b
+    let b = a;
+    b
 }
 
 #[no_mangle]
 #[export_name = "TestBoxFree"]
-pub extern fn test_box_free (
-    buffer: Box<TestTableFixed>
-    )
-{
-  // it will call __rust_dealloc()
+pub extern "C" fn test_box_free(buffer: Box<TestTableFixed>) {
+    // it will call __rust_dealloc()
 }
 
 #[no_mangle]
 #[export_name = "TestBoxAllocFail"]
-pub extern fn test_box_alloc_fail (
-    size: u32
-    ) -> Box<[u8; 0x800]>
-{
+pub extern "C" fn test_box_alloc_fail(size: u32) -> Box<[u8; 0x800]> {
     let mut a = Box::new([0_u8; 0x800]); // it will call __rust_alloc().
 
     a
@@ -318,22 +277,17 @@ pub extern fn test_box_alloc_fail (
 
 #[no_mangle]
 #[export_name = "TestBoxConvert"]
-pub extern fn test_box_convert (
-    size: usize
-    ) -> *mut u8
-{
+pub extern "C" fn test_box_convert(size: usize) -> *mut u8 {
     let layout = unsafe { core::alloc::Layout::from_size_align_unchecked(size, 4) };
     unsafe {
-      match Global.alloc (layout) {
-        Ok(buffer) => {
-          let mut box_buffer = Box::<u8>::from_raw(from_raw_parts_mut(buffer.as_ptr(), layout.size()) as *mut [u8] as *mut u8 );
-          Global.dealloc (buffer, layout);
-          *box_buffer = 1;
-          Box::<u8>::into_raw(box_buffer)
-        },
-        Err(_) => handle_alloc_error (layout),
-      }
+        match Global.allocate(layout) {
+            Ok(buffer) => {
+                let mut box_buffer = Box::<u8>::from_raw(buffer.as_mut_ptr());
+                Global.deallocate(buffer.as_non_null_ptr(), layout);
+                *box_buffer = 1;
+                Box::<u8>::into_raw(box_buffer)
+            }
+            Err(_) => handle_alloc_error(layout),
+        }
     }
-
-
 }
-- 
2.35.1