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CFI: Fix encode_ty: unexpected Param(B/#1)
Fixes rust-lang#111510 and complements rust-lang#106547 by adding support for encoding type parameters and also by transforming trait objects' traits into their identities before emitting type checks.
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81 changes: 63 additions & 18 deletions
81
tests/codegen/sanitizer-cfi-emit-type-metadata-trait-objects.rs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,44 +1,89 @@ | ||
| // Verifies that type metadata identifiers for trait objects are emitted correctly. | ||
| // | ||
| // needs-sanitizer-cfi | ||
| // compile-flags: -Clto -Cno-prepopulate-passes -Ctarget-feature=-crt-static -Zsanitizer=cfi | ||
| // compile-flags: -Clto -Cno-prepopulate-passes -Copt-level=0 -Ctarget-feature=-crt-static -Zsanitizer=cfi | ||
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| #![crate_type="lib"] | ||
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| trait Trait1 { | ||
| pub trait Trait1 { | ||
| fn foo(&self); | ||
| } | ||
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| struct Type1; | ||
| #[derive(Clone, Copy)] | ||
| pub struct Type1; | ||
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| impl Trait1 for Type1 { | ||
| fn foo(&self) { | ||
| } | ||
| } | ||
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| pub fn foo() { | ||
| let a = Type1; | ||
| pub trait Trait2<T> { | ||
| fn bar(&self); | ||
| } | ||
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| pub struct Type2; | ||
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| impl Trait2<i32> for Type2 { | ||
| fn bar(&self) { | ||
| } | ||
| } | ||
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| pub trait Trait3<T> { | ||
| fn baz(&self, _: &T); | ||
| } | ||
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| pub struct Type3; | ||
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| impl<T, U> Trait3<U> for T { | ||
| fn baz(&self, _: &U) { | ||
| } | ||
| } | ||
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| pub fn foo1(a: &dyn Trait1) { | ||
| a.foo(); | ||
| // CHECK-LABEL: define{{.*}}foo{{.*}}!type !{{[0-9]+}} | ||
| // CHECK: call <sanitizer_cfi_emit_type_metadata_trait_objects::Type1 as sanitizer_cfi_emit_type_metadata_trait_objects::Trait1>::foo | ||
| // CHECK-LABEL: define{{.*}}4foo1{{.*}}!type !{{[0-9]+}} | ||
| // CHECK: call i1 @llvm.type.test({{i8\*|ptr}} {{%f|%[0-9]}}, metadata !"[[TYPE1:[[:print:]]+]]") | ||
| } | ||
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| pub fn bar() { | ||
| pub fn bar1() { | ||
| let a = Type1; | ||
| let b = &a as &dyn Trait1; | ||
| b.foo(); | ||
| // CHECK-LABEL: define{{.*}}bar{{.*}}!type !{{[0-9]+}} | ||
| // CHECK: call i1 @llvm.type.test({{i8\*|ptr}} {{%f|%0|%1}}, metadata !"[[TYPE1:[[:print:]]+]]") | ||
| // CHECK-LABEL: define{{.*}}4bar1{{.*}}!type !{{[0-9]+}} | ||
| // CHECK: call i1 @llvm.type.test({{i8\*|ptr}} {{%f|%[0-9]}}, metadata !"[[TYPE2:[[:print:]]+]]") | ||
| } | ||
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| pub fn baz() { | ||
| let a = Type1; | ||
| let b = &a as &dyn Trait1; | ||
| a.foo(); | ||
| b.foo(); | ||
| // CHECK-LABEL: define{{.*}}baz{{.*}}!type !{{[0-9]+}} | ||
| // CHECK: call <sanitizer_cfi_emit_type_metadata_trait_objects::Type1 as sanitizer_cfi_emit_type_metadata_trait_objects::Trait1>::foo | ||
| // CHECK: call i1 @llvm.type.test({{i8\*|ptr}} {{%f|%0|%1}}, metadata !"[[TYPE1:[[:print:]]+]]") | ||
| pub fn foo2<T>(a: &dyn Trait2<T>) { | ||
| a.bar(); | ||
| // CHECK-LABEL: define{{.*}}4foo2{{.*}}!type !{{[0-9]+}} | ||
| // CHECK: call i1 @llvm.type.test({{i8\*|ptr}} {{%f|%[0-9]}}, metadata !"[[TYPE2:[[:print:]]+]]") | ||
| } | ||
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| pub fn bar2() { | ||
| let a = Type2; | ||
| foo2(&a); | ||
| let b = &a as &dyn Trait2<i32>; | ||
| b.bar(); | ||
| // CHECK-LABEL: define{{.*}}4bar2{{.*}}!type !{{[0-9]+}} | ||
| // CHECK: call i1 @llvm.type.test({{i8\*|ptr}} {{%f|%[0-9]}}, metadata !"[[TYPE2:[[:print:]]+]]") | ||
| } | ||
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| pub fn foo3(a: &dyn Trait3<Type3>) { | ||
| let b = Type3; | ||
| a.baz(&b); | ||
| // CHECK-LABEL: define{{.*}}4foo3{{.*}}!type !{{[0-9]+}} | ||
| // CHECK: call i1 @llvm.type.test({{i8\*|ptr}} {{%f|%[0-9]}}, metadata !"[[TYPE3:[[:print:]]+]]") | ||
| } | ||
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| pub fn bar3() { | ||
| let a = Type3; | ||
| foo3(&a); | ||
| let b = &a as &dyn Trait3<Type3>; | ||
| b.baz(&a); | ||
| // CHECK-LABEL: define{{.*}}4bar3{{.*}}!type !{{[0-9]+}} | ||
| // CHECK: call i1 @llvm.type.test({{i8\*|ptr}} {{%f|%[0-9]}}, metadata !"[[TYPE3:[[:print:]]+]]") | ||
| } | ||
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| // CHECK: !{{[0-9]+}} = !{i64 0, !"[[TYPE1]]"} | ||
| // CHECK: !{{[0-9]+}} = !{i64 0, !"[[TYPE2]]"} | ||
| // CHECK: !{{[0-9]+}} = !{i64 0, !"[[TYPE3]]"} |
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