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Prevent insta-stable no alloc shim support

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You will need to add the following as replacement for the old __rust_*
definitions when not using the alloc shim.

    #[no_mangle]
    static __rust_no_alloc_shim_is_unstable: u8 = 0;
This commit is contained in:
bjorn3 2022-09-10 11:33:44 +00:00
parent 2be697f60d
commit da466a2adc
1 changed files with 6 additions and 1 deletions
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7
src/allocator.rs
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@ -3,7 +3,7 @@
use gccjit::{FunctionType, GlobalKind, ToRValue}; use gccjit::{FunctionType, GlobalKind, ToRValue};
use rustc_ast::expand::allocator::{ use rustc_ast::expand::allocator::{
alloc_error_handler_name, default_fn_name, global_fn_name, AllocatorKind, AllocatorTy, alloc_error_handler_name, default_fn_name, global_fn_name, AllocatorKind, AllocatorTy,
ALLOCATOR_METHODS, ALLOCATOR_METHODS, NO_ALLOC_SHIM_IS_UNSTABLE,
}; };
use rustc_middle::bug; use rustc_middle::bug;
use rustc_middle::ty::TyCtxt; use rustc_middle::ty::TyCtxt;
@ -127,4 +127,9 @@ pub(crate) unsafe fn codegen(tcx: TyCtxt<'_>, mods: &mut GccContext, _module_nam
let value = tcx.sess.opts.unstable_opts.oom.should_panic(); let value = tcx.sess.opts.unstable_opts.oom.should_panic();
let value = context.new_rvalue_from_int(i8, value as i32); let value = context.new_rvalue_from_int(i8, value as i32);
global.global_set_initializer_rvalue(value); global.global_set_initializer_rvalue(value);
let name = NO_ALLOC_SHIM_IS_UNSTABLE.to_string();
let global = context.new_global(None, GlobalKind::Exported, i8, name);
let value = context.new_rvalue_from_int(i8, 0);
global.global_set_initializer_rvalue(value);
} }