diff options
Diffstat (limited to 'tests/codegen-llvm/debuginfo-generic-closure-env-names.rs')
| -rw-r--r-- | tests/codegen-llvm/debuginfo-generic-closure-env-names.rs | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/tests/codegen-llvm/debuginfo-generic-closure-env-names.rs b/tests/codegen-llvm/debuginfo-generic-closure-env-names.rs new file mode 100644 index 00000000000..64bc58e1df7 --- /dev/null +++ b/tests/codegen-llvm/debuginfo-generic-closure-env-names.rs @@ -0,0 +1,90 @@ +// ignore-tidy-linelength +//! This test checks that we get proper type names for closure environments and +//! async-fn environments in debuginfo, especially making sure that generic arguments +//! of the enclosing functions don't get lost. +//! +//! Unfortunately, the order that debuginfo gets emitted into LLVM IR becomes a bit hard +//! to predict once async fns are involved, so DAG allows any order. +//! +//! Note that the test does not check async-fns when targeting MSVC because debuginfo for +//! those does not follow the enum-fallback encoding yet and thus is incomplete. + +//@ revisions: MSVC NONMSVC +//@[MSVC] only-msvc +//@[NONMSVC] ignore-msvc + +// Use the v0 symbol mangling scheme to codegen order independent of rustc version. +// Unnamed items like shims are generated in lexicographical order of their symbol name and in the +// legacy mangling scheme rustc version and generic parameters are both hashed into a single part +// of the name, thus randomizing item order with respect to rustc version. + +//@ compile-flags: -Cdebuginfo=2 -Copt-level=0 -Csymbol-mangling-version=v0 +//@ edition: 2021 + +// non_generic_closure() +// NONMSVC: !DICompositeType(tag: DW_TAG_structure_type, name: "{closure_env#0}", scope: ![[non_generic_closure_NAMESPACE:[0-9]+]], +// MSVC: !DICompositeType(tag: DW_TAG_structure_type, name: "closure_env$0", scope: ![[non_generic_closure_NAMESPACE:[0-9]+]], +// CHECK: ![[non_generic_closure_NAMESPACE]] = !DINamespace(name: "non_generic_closure" + +// CHECK: ![[function_containing_closure_NAMESPACE:[0-9]+]] = !DINamespace(name: "function_containing_closure" +// CHECK: ![[generic_async_function_NAMESPACE:[0-9]+]] = !DINamespace(name: "generic_async_function" +// CHECK: ![[generic_async_block_NAMESPACE:[0-9]+]] = !DINamespace(name: "generic_async_block" + +// function_containing_closure<u32>() +// NONMSVC-DAG: !DICompositeType(tag: DW_TAG_structure_type, name: "{closure_env#0}<u32>", scope: ![[function_containing_closure_NAMESPACE]] +// MSVC-DAG: !DICompositeType(tag: DW_TAG_structure_type, name: "closure_env$0<u32>", scope: ![[function_containing_closure_NAMESPACE]] + +// generic_async_function<Foo>() +// NONMSVC-DAG: !DICompositeType(tag: DW_TAG_structure_type, name: "{async_fn_env#0}<debuginfo_generic_closure_env_names::Foo>", scope: ![[generic_async_function_NAMESPACE]] + +// generic_async_function<u32>() +// NONMSVC-DAG: !DICompositeType(tag: DW_TAG_structure_type, name: "{async_fn_env#0}<u32>", scope: ![[generic_async_function_NAMESPACE]] + +// generic_async_block<Foo>() +// NONMSVC-DAG: !DICompositeType(tag: DW_TAG_structure_type, name: "{async_block_env#0}<debuginfo_generic_closure_env_names::Foo>", scope: ![[generic_async_block_NAMESPACE]] + +// generic_async_block<u32>() +// NONMSVC-DAG: !DICompositeType(tag: DW_TAG_structure_type, name: "{async_block_env#0}<u32>", scope: ![[generic_async_block_NAMESPACE]] + +// function_containing_closure<Foo>() +// NONMSVC-DAG: !DICompositeType(tag: DW_TAG_structure_type, name: "{closure_env#0}<debuginfo_generic_closure_env_names::Foo>", scope: ![[function_containing_closure_NAMESPACE]] +// MSVC-DAG: !DICompositeType(tag: DW_TAG_structure_type, name: "closure_env$0<debuginfo_generic_closure_env_names::Foo>", scope: ![[function_containing_closure_NAMESPACE]] + +#![crate_type = "lib"] +use std::future::Future; + +pub struct Foo; + +pub fn non_generic_closure(x: Foo) -> Box<dyn FnOnce() -> Foo> { + return Box::new(move || x); +} + +fn function_containing_closure<T: 'static>(x: T) -> impl FnOnce() -> T { + // This static only exists to trigger generating the namespace debuginfo for + // `function_containing_closure` at a predictable, early point, which makes + // writing the FileCheck tests above simpler. + static _X: u8 = 0; + + return move || x; +} + +async fn generic_async_function<T: 'static>(x: T) -> T { + static _X: u8 = 0; // Same as above + x +} + +fn generic_async_block<T: 'static>(x: T) -> impl Future<Output = T> { + static _X: u8 = 0; // Same as above + async move { x } +} + +pub fn instantiate_generics() { + let _closure_u32 = function_containing_closure(7u32); + let _closure_foo = function_containing_closure(Foo); + + let _async_fn_u32 = generic_async_function(42u32); + let _async_fn_foo = generic_async_function(Foo); + + let _async_block_u32 = generic_async_block(64u32); + let _async_block_foo = generic_async_block(Foo); +} |