Mark extern blocks as unsafe

2 files changed, 31 insertions, 31 deletions

diff --git a/library/unwind/src/lib.rs b/library/unwind/src/lib.rs
index e4ba2bc1ed8..2650b273a4d 100644
--- a/library/unwind/src/lib.rs
+++ b/library/unwind/src/lib.rs
@@ -56,15 +56,15 @@ cfg_if::cfg_if! {
         compile_error!("`llvm-libunwind` and `system-llvm-libunwind` cannot be enabled at the same time");
     } else if #[cfg(feature = "llvm-libunwind")] {
         #[link(name = "unwind", kind = "static", modifiers = "-bundle")]
-        extern "C" {}
+        unsafe extern "C" {}
     } else if #[cfg(feature = "system-llvm-libunwind")] {
         #[link(name = "unwind", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
         #[link(name = "unwind", cfg(not(target_feature = "crt-static")))]
-        extern "C" {}
+        unsafe extern "C" {}
     } else {
         #[link(name = "unwind", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
         #[link(name = "gcc_s", cfg(not(target_feature = "crt-static")))]
-        extern "C" {}
+        unsafe extern "C" {}
     }
 }
 
@@ -76,11 +76,11 @@ cfg_if::cfg_if! {
         compile_error!("`llvm-libunwind` and `system-llvm-libunwind` cannot be enabled at the same time");
     } else if #[cfg(feature = "llvm-libunwind")] {
         #[link(name = "unwind", kind = "static", modifiers = "-bundle")]
-        extern "C" {}
+        unsafe extern "C" {}
     } else {
         #[link(name = "unwind", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
         #[link(name = "unwind", cfg(not(target_feature = "crt-static")))]
-        extern "C" {}
+        unsafe extern "C" {}
     }
 }
 
@@ -91,14 +91,14 @@ cfg_if::cfg_if! {
     } else {
         #[link(name = "unwind", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
         #[link(name = "unwind", cfg(not(target_feature = "crt-static")))]
-        extern "C" {}
+        unsafe extern "C" {}
     }
 }
 // Android's unwinding library depends on dl_iterate_phdr in `libdl`.
 #[cfg(target_os = "android")]
 #[link(name = "dl", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
 #[link(name = "dl", cfg(not(target_feature = "crt-static")))]
-extern "C" {}
+unsafe extern "C" {}
 
 // When building with crt-static, we get `gcc_eh` from the `libc` crate, since
 // glibc needs it, and needs it listed later on the linker command line. We
@@ -110,7 +110,7 @@ extern "C" {}
     not(feature = "system-llvm-libunwind")
 ))]
 #[link(name = "gcc_s", cfg(not(target_feature = "crt-static")))]
-extern "C" {}
+unsafe extern "C" {}
 
 #[cfg(all(
     target_os = "linux",
@@ -119,67 +119,67 @@ extern "C" {}
     feature = "system-llvm-libunwind"
 ))]
 #[link(name = "unwind", cfg(not(target_feature = "crt-static")))]
-extern "C" {}
+unsafe extern "C" {}
 
 #[cfg(target_os = "redox")]
 #[link(name = "gcc_eh", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
 #[link(name = "gcc_s", cfg(not(target_feature = "crt-static")))]
-extern "C" {}
+unsafe extern "C" {}
 
 #[cfg(all(target_vendor = "fortanix", target_env = "sgx"))]
 #[link(name = "unwind", kind = "static", modifiers = "-bundle")]
-extern "C" {}
+unsafe extern "C" {}
 
 #[cfg(target_os = "netbsd")]
 #[link(name = "gcc_s")]
-extern "C" {}
+unsafe extern "C" {}
 
 #[cfg(target_os = "freebsd")]
 #[link(name = "gcc", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
 #[link(name = "gcc_eh", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
 #[link(name = "gcc_s", cfg(not(target_feature = "crt-static")))]
-extern "C" {}
+unsafe extern "C" {}
 
 #[cfg(all(target_os = "openbsd", target_arch = "sparc64"))]
 #[link(name = "gcc")]
-extern "C" {}
+unsafe extern "C" {}
 
 #[cfg(all(target_os = "openbsd", not(target_arch = "sparc64")))]
 #[link(name = "c++abi")]
-extern "C" {}
+unsafe extern "C" {}
 
 #[cfg(any(target_os = "solaris", target_os = "illumos"))]
 #[link(name = "gcc_s")]
-extern "C" {}
+unsafe extern "C" {}
 
 #[cfg(target_os = "dragonfly")]
 #[link(name = "gcc_pic")]
-extern "C" {}
+unsafe extern "C" {}
 
 #[cfg(target_os = "haiku")]
 #[link(name = "gcc_s")]
-extern "C" {}
+unsafe extern "C" {}
 
 #[cfg(target_os = "aix")]
 #[link(name = "unwind")]
-extern "C" {}
+unsafe extern "C" {}
 
 #[cfg(target_os = "nto")]
 cfg_if::cfg_if! {
     if #[cfg(target_env = "nto70")] {
         #[link(name = "gcc")]
-        extern "C" {}
+        unsafe extern "C" {}
     } else {
         #[link(name = "gcc_s")]
-        extern "C" {}
+        unsafe extern "C" {}
     }
 }
 
 #[cfg(target_os = "hurd")]
 #[link(name = "gcc_s")]
-extern "C" {}
+unsafe extern "C" {}
 
 #[cfg(all(target_os = "windows", target_env = "gnu", target_abi = "llvm"))]
 #[link(name = "unwind", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
 #[link(name = "unwind", cfg(not(target_feature = "crt-static")))]
-extern "C" {}
+unsafe extern "C" {}
diff --git a/library/unwind/src/libunwind.rs b/library/unwind/src/libunwind.rs
index 1fa9e480166..62165f8a200 100644
--- a/library/unwind/src/libunwind.rs
+++ b/library/unwind/src/libunwind.rs
@@ -108,10 +108,10 @@ pub type _Unwind_Exception_Cleanup_Fn =
     ),
     link(name = "unwind", kind = "static", modifiers = "-bundle")
 )]
-extern "C-unwind" {
+unsafe extern "C-unwind" {
     pub fn _Unwind_Resume(exception: *mut _Unwind_Exception) -> !;
 }
-extern "C" {
+unsafe extern "C" {
     pub fn _Unwind_DeleteException(exception: *mut _Unwind_Exception);
     pub fn _Unwind_GetLanguageSpecificData(ctx: *mut _Unwind_Context) -> *mut c_void;
     pub fn _Unwind_GetRegionStart(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
@@ -140,7 +140,7 @@ if #[cfg(any(target_vendor = "apple", target_os = "netbsd", not(target_arch = "a
         all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux", target_os = "xous")),
         link(name = "unwind", kind = "static", modifiers = "-bundle")
     )]
-    extern "C" {
+    unsafe extern "C" {
         pub fn _Unwind_GetGR(ctx: *mut _Unwind_Context, reg_index: c_int) -> _Unwind_Word;
         pub fn _Unwind_SetGR(ctx: *mut _Unwind_Context, reg_index: c_int, value: _Unwind_Word);
         pub fn _Unwind_GetIP(ctx: *mut _Unwind_Context) -> _Unwind_Word;
@@ -198,7 +198,7 @@ if #[cfg(any(target_vendor = "apple", target_os = "netbsd", not(target_arch = "a
         all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux", target_os = "xous")),
         link(name = "unwind", kind = "static", modifiers = "-bundle")
     )]
-    extern "C" {
+    unsafe extern "C" {
         fn _Unwind_VRS_Get(ctx: *mut _Unwind_Context,
                            regclass: _Unwind_VRS_RegClass,
                            regno: _Unwind_Word,
@@ -261,7 +261,7 @@ cfg_if::cfg_if! {
 if #[cfg(all(target_vendor = "apple", not(target_os = "watchos"), target_arch = "arm"))] {
     // 32-bit ARM Apple (except for watchOS armv7k specifically) uses SjLj and
     // does not provide _Unwind_Backtrace()
-    extern "C-unwind" {
+    unsafe extern "C-unwind" {
         pub fn _Unwind_SjLj_RaiseException(e: *mut _Unwind_Exception) -> _Unwind_Reason_Code;
     }
 
@@ -271,14 +271,14 @@ if #[cfg(all(target_vendor = "apple", not(target_os = "watchos"), target_arch =
         all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux", target_os = "xous")),
         link(name = "unwind", kind = "static", modifiers = "-bundle")
     )]
-    extern "C-unwind" {
+    unsafe extern "C-unwind" {
         pub fn _Unwind_RaiseException(exception: *mut _Unwind_Exception) -> _Unwind_Reason_Code;
     }
     #[cfg_attr(
         all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux", target_os = "xous")),
         link(name = "unwind", kind = "static", modifiers = "-bundle")
     )]
-    extern "C" {
+    unsafe extern "C" {
         pub fn _Unwind_Backtrace(trace: _Unwind_Trace_Fn,
                                  trace_argument: *mut c_void)
                                  -> _Unwind_Reason_Code;
@@ -302,7 +302,7 @@ if #[cfg(all(windows, any(target_arch = "aarch64", target_arch = "x86_64"), targ
                                               context: *mut _Unwind_Context)
                                               -> _Unwind_Reason_Code;
 
-    extern "C" {
+    unsafe extern "C" {
         pub fn _GCC_specific_handler(exceptionRecord: *mut EXCEPTION_RECORD,
                                 establisherFrame: LPVOID,
                                 contextRecord: *mut CONTEXT,