Sync from rust 3153584

Author: bjorn3

src/allocator.rs

@@ -4,6 +4,7 @@
 use crate::prelude::*;
 
 use rustc_ast::expand::allocator::{AllocatorKind, AllocatorTy, ALLOCATOR_METHODS};
+use rustc_session::config::OomStrategy;
 
 /// Returns whether an allocator shim was created
 pub(crate) fn codegen(
@@ -18,7 +19,13 @@ pub(crate) fn codegen(
     if any_dynamic_crate {
         false
     } else if let Some(kind) = tcx.allocator_kind(()) {
-        codegen_inner(module, unwind_context, kind, tcx.lang_items().oom().is_some());
+        codegen_inner(
+            module,
+            unwind_context,
+            kind,
+            tcx.lang_items().oom().is_some(),
+            tcx.sess.opts.debugging_opts.oom,
+        );
         true
     } else {
         false
@@ -30,6 +37,7 @@ fn codegen_inner(
     unwind_context: &mut UnwindContext,
     kind: AllocatorKind,
     has_alloc_error_handler: bool,
+    oom_strategy: OomStrategy,
 ) {
     let usize_ty = module.target_config().pointer_type();
 
@@ -129,4 +137,11 @@ fn codegen_inner(
     }
     module.define_function(func_id, &mut ctx).unwrap();
     unwind_context.add_function(func_id, &ctx, module.isa());
+
+    let data_id = module.declare_data(OomStrategy::SYMBOL, Linkage::Export, false, false).unwrap();
+    let mut data_ctx = DataContext::new();
+    data_ctx.set_align(1);
+    let val = oom_strategy.should_panic();
+    data_ctx.define(Box::new([val]));
+    module.define_data(data_id, &data_ctx).unwrap();
 }

src/constant.rs

@@ -1,7 +1,6 @@
 //! Handling of `static`s, `const`s and promoted allocations
 
 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
-use rustc_errors::ErrorGuaranteed;
 use rustc_middle::middle::codegen_fn_attrs::CodegenFnAttrFlags;
 use rustc_middle::mir::interpret::{
     read_target_uint, AllocId, ConstAllocation, ConstValue, ErrorHandled, GlobalAlloc, Scalar,
@@ -54,7 +53,7 @@ pub(crate) fn check_constants(fx: &mut FunctionCx<'_, '_, '_>) -> bool {
                 {
                     all_constants_ok = false;
                     match err {
-                        ErrorHandled::Reported(ErrorGuaranteed) | ErrorHandled::Linted => {
+                        ErrorHandled::Reported(_) | ErrorHandled::Linted => {
                             fx.tcx.sess.span_err(constant.span, "erroneous constant encountered");
                         }
                         ErrorHandled::TooGeneric => {