Update enum debuginfo tests

Bug #52452 notes some debuginfo test regressions when moving to gdb
8.1.  This series will also cause versions of gdb before 8.2 to fail
when a recent LLVM is used -- DW_TAG_variant_part support was not
added until 8.2.

This patch updates one of the builders to a later version of Ubuntu,
and then arranges to install gdb 8.2 from the toolchain PPA.  It
updates the relevant tests to require both a new-enough LLVM and a
new-enough gdb; the subsequent patch arranges to continue testing the
fallback mode.

The "gdbg" results are removed from these tests because the tests now
require a rust-enabled gdb.

Author: tromey

src/ci/docker/x86_64-gnu/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:16.04
+FROM ubuntu:18.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
   g++ \
@@ -9,10 +9,14 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   python2.7 \
   git \
   cmake \
+  software-properties-common \
   sudo \
-  gdb \
   xz-utils
 
+RUN add-apt-repository ppa:ubuntu-toolchain-r/test && \
+  apt-get update && \
+  apt-get install -y --no-install-recommends gdb
+
 COPY scripts/sccache.sh /scripts/
 RUN sh /scripts/sccache.sh
 

src/test/debuginfo/borrowed-enum.rs

@@ -10,7 +10,10 @@
 
 // ignore-tidy-linelength
 // min-lldb-version: 310
-// ignore-gdb-version: 7.11.90 - 7.12.9
+
+// Require LLVM with DW_TAG_variant_part and a gdb that can read it.
+// min-system-llvm-version: 7.0
+// min-gdb-version: 8.2
 
 // compile-flags:-g
 
@@ -19,15 +22,12 @@
 // gdb-command:run
 
 // gdb-command:print *the_a_ref
-// gdbg-check:$1 = {{RUST$ENUM$DISR = TheA, x = 0, y = 8970181431921507452}, {RUST$ENUM$DISR = TheA, [...]}}
 // gdbr-check:$1 = borrowed_enum::ABC::TheA{x: 0, y: 8970181431921507452}
 
 // gdb-command:print *the_b_ref
-// gdbg-check:$2 = {{RUST$ENUM$DISR = TheB, [...]}, {RUST$ENUM$DISR = TheB, __0 = 0, __1 = 286331153, __2 = 286331153}}
 // gdbr-check:$2 = borrowed_enum::ABC::TheB(0, 286331153, 286331153)
 
 // gdb-command:print *univariant_ref
-// gdbg-check:$3 = {{__0 = 4820353753753434}}
 // gdbr-check:$3 = borrowed_enum::Univariant::TheOnlyCase(4820353753753434)
 
 

src/test/debuginfo/generic-enum-with-different-disr-sizes.rs

@@ -12,43 +12,39 @@
 // ignore-lldb: FIXME(#27089)
 // min-lldb-version: 310
 
+// Require LLVM with DW_TAG_variant_part and a gdb that can read it.
+// min-system-llvm-version: 7.0
+// min-gdb-version: 8.2
+
 // compile-flags:-g
 
 // === GDB TESTS ===================================================================================
 // gdb-command:run
 
 // gdb-command:print eight_bytes1
-// gdbg-check:$1 = {{RUST$ENUM$DISR = Variant1, __0 = 100}, {RUST$ENUM$DISR = Variant1, __0 = 100}}
-// gdbr-check:$1 = generic_enum_with_different_disr_sizes::Enum::Variant1(100)
+// gdbr-check:$1 = generic_enum_with_different_disr_sizes::Enum<f64>::Variant1(100)
 
 // gdb-command:print four_bytes1
-// gdbg-check:$2 = {{RUST$ENUM$DISR = Variant1, __0 = 101}, {RUST$ENUM$DISR = Variant1, __0 = 101}}
-// gdbr-check:$2 = generic_enum_with_different_disr_sizes::Enum::Variant1(101)
+// gdbr-check:$2 = generic_enum_with_different_disr_sizes::Enum<i32>::Variant1(101)
 
 // gdb-command:print two_bytes1
-// gdbg-check:$3 = {{RUST$ENUM$DISR = Variant1, __0 = 102}, {RUST$ENUM$DISR = Variant1, __0 = 102}}
-// gdbr-check:$3 = generic_enum_with_different_disr_sizes::Enum::Variant1(102)
+// gdbr-check:$3 = generic_enum_with_different_disr_sizes::Enum<i16>::Variant1(102)
 
 // gdb-command:print one_byte1
-// gdbg-check:$4 = {{RUST$ENUM$DISR = Variant1, __0 = 65 'A'}, {RUST$ENUM$DISR = Variant1, __0 = 65 'A'}}
-// gdbr-check:$4 = generic_enum_with_different_disr_sizes::Enum::Variant1(65)
+// gdbr-check:$4 = generic_enum_with_different_disr_sizes::Enum<u8>::Variant1(65)
 
 
 // gdb-command:print eight_bytes2
-// gdbg-check:$5 = {{RUST$ENUM$DISR = Variant2, __0 = 100}, {RUST$ENUM$DISR = Variant2, __0 = 100}}
-// gdbr-check:$5 = generic_enum_with_different_disr_sizes::Enum::Variant2(100)
+// gdbr-check:$5 = generic_enum_with_different_disr_sizes::Enum<f64>::Variant2(100)
 
 // gdb-command:print four_bytes2
-// gdbg-check:$6 = {{RUST$ENUM$DISR = Variant2, __0 = 101}, {RUST$ENUM$DISR = Variant2, __0 = 101}}
-// gdbr-check:$6 = generic_enum_with_different_disr_sizes::Enum::Variant2(101)
+// gdbr-check:$6 = generic_enum_with_different_disr_sizes::Enum<i32>::Variant2(101)
 
 // gdb-command:print two_bytes2
-// gdbg-check:$7 = {{RUST$ENUM$DISR = Variant2, __0 = 102}, {RUST$ENUM$DISR = Variant2, __0 = 102}}
-// gdbr-check:$7 = generic_enum_with_different_disr_sizes::Enum::Variant2(102)
+// gdbr-check:$7 = generic_enum_with_different_disr_sizes::Enum<i16>::Variant2(102)
 
 // gdb-command:print one_byte2
-// gdbg-check:$8 = {{RUST$ENUM$DISR = Variant2, __0 = 65 'A'}, {RUST$ENUM$DISR = Variant2, __0 = 65 'A'}}
-// gdbr-check:$8 = generic_enum_with_different_disr_sizes::Enum::Variant2(65)
+// gdbr-check:$8 = generic_enum_with_different_disr_sizes::Enum<u8>::Variant2(65)
 
 // gdb-command:continue
 

src/test/debuginfo/generic-struct-style-enum.rs

@@ -10,27 +10,26 @@
 
 // ignore-tidy-linelength
 // min-lldb-version: 310
-// ignore-gdb-version: 7.11.90 - 7.12.9
+
+// Require LLVM with DW_TAG_variant_part and a gdb that can read it.
+// min-system-llvm-version: 7.0
+// min-gdb-version: 8.2
 
 // compile-flags:-g
 
 // gdb-command:set print union on
 // gdb-command:run
 
 // gdb-command:print case1
-// gdbg-check:$1 = {{RUST$ENUM$DISR = Case1, a = 0, b = 31868, c = 31868, d = 31868, e = 31868}, {RUST$ENUM$DISR = Case1, [...]}, {RUST$ENUM$DISR = Case1, [...]}}
-// gdbr-check:$1 = generic_struct_style_enum::Regular::Case1{a: 0, b: 31868, c: 31868, d: 31868, e: 31868}
+// gdbr-check:$1 = generic_struct_style_enum::Regular<u16, u32, i64>::Case1{a: 0, b: 31868, c: 31868, d: 31868, e: 31868}
 
 // gdb-command:print case2
-// gdbg-check:$2 = {{RUST$ENUM$DISR = Case2, [...]}, {RUST$ENUM$DISR = Case2, a = 0, b = 286331153, c = 286331153}, {RUST$ENUM$DISR = Case2, [...]}}
-// gdbr-check:$2 = generic_struct_style_enum::Regular::Case2{a: 0, b: 286331153, c: 286331153}
+// gdbr-check:$2 = generic_struct_style_enum::Regular<i16, u32, i64>::Case2{a: 0, b: 286331153, c: 286331153}
 
 // gdb-command:print case3
-// gdbg-check:$3 = {{RUST$ENUM$DISR = Case3, [...]}, {RUST$ENUM$DISR = Case3, [...]}, {RUST$ENUM$DISR = Case3, a = 0, b = 6438275382588823897}}
-// gdbr-check:$3 = generic_struct_style_enum::Regular::Case3{a: 0, b: 6438275382588823897}
+// gdbr-check:$3 = generic_struct_style_enum::Regular<u16, i32, u64>::Case3{a: 0, b: 6438275382588823897}
 
 // gdb-command:print univariant
-// gdbg-check:$4 = {{a = -1}}
 // gdbr-check:$4 = generic_struct_style_enum::Univariant<i32>::TheOnlyCase{a: -1}
 
 

src/test/debuginfo/generic-tuple-style-enum.rs

@@ -10,7 +10,10 @@
 
 // ignore-tidy-linelength
 // min-lldb-version: 310
-// ignore-gdb-version: 7.11.90 - 7.12.9
+
+// Require LLVM with DW_TAG_variant_part and a gdb that can read it.
+// min-system-llvm-version: 7.0
+// min-gdb-version: 8.2
 
 // compile-flags:-g
 
@@ -20,19 +23,15 @@
 // gdb-command:run
 
 // gdb-command:print case1
-// gdbg-check:$1 = {{RUST$ENUM$DISR = Case1, __0 = 0, __1 = 31868, __2 = 31868, __3 = 31868, __4 = 31868}, {RUST$ENUM$DISR = Case1, [...]}, {RUST$ENUM$DISR = Case1, [...]}}
-// gdbr-check:$1 = generic_tuple_style_enum::Regular::Case1(0, 31868, 31868, 31868, 31868)
+// gdbr-check:$1 = generic_tuple_style_enum::Regular<u16, u32, u64>::Case1(0, 31868, 31868, 31868, 31868)
 
 // gdb-command:print case2
-// gdbg-check:$2 = {{RUST$ENUM$DISR = Case2, [...]}, {RUST$ENUM$DISR = Case2, __0 = 0, __1 = 286331153, __2 = 286331153}, {RUST$ENUM$DISR = Case2, [...]}}
-// gdbr-check:$2 = generic_tuple_style_enum::Regular::Case2(0, 286331153, 286331153)
+// gdbr-check:$2 = generic_tuple_style_enum::Regular<i16, i32, i64>::Case2(0, 286331153, 286331153)
 
 // gdb-command:print case3
-// gdbg-check:$3 = {{RUST$ENUM$DISR = Case3, [...]}, {RUST$ENUM$DISR = Case3, [...]}, {RUST$ENUM$DISR = Case3, __0 = 0, __1 = 6438275382588823897}}
-// gdbr-check:$3 = generic_tuple_style_enum::Regular::Case3(0, 6438275382588823897)
+// gdbr-check:$3 = generic_tuple_style_enum::Regular<i16, i32, i64>::Case3(0, 6438275382588823897)
 
 // gdb-command:print univariant
-// gdbg-check:$4 = {{__0 = -1}}
 // gdbr-check:$4 = generic_tuple_style_enum::Univariant<i64>::TheOnlyCase(-1)
 
 

src/test/debuginfo/nil-enum.rs

@@ -12,16 +12,21 @@
 // ignore-lldb
 
 
+// Require LLVM with DW_TAG_variant_part and a gdb that can read it.
+// gdb 8.2.0 crashes on this test case, see
+// https://sourceware.org/bugzilla/show_bug.cgi?id=23626
+// This will be fixed in the next release, which will be >= 8.2.1.
+// min-system-llvm-version: 7.0
+// min-gdb-version: 8.2.1
+
 // compile-flags:-g
 // gdb-command:run
 
 // gdb-command:print first
-// gdbg-check:$1 = {<No data fields>}
-// gdbr-check:$1 = <error reading variable>
+// gdbr-check:$1 = nil_enum::ANilEnum {<No data fields>}
 
 // gdb-command:print second
-// gdbg-check:$2 = {<No data fields>}
-// gdbr-check:$2 = <error reading variable>
+// gdbr-check:$2 = nil_enum::AnotherNilEnum {<No data fields>}
 
 #![allow(unused_variables)]
 #![feature(omit_gdb_pretty_printer_section)]

src/test/debuginfo/recursive-struct.rs

@@ -10,74 +10,63 @@
 
 // ignore-tidy-linelength
 // ignore-lldb
-// ignore-gdb-version: 7.11.90 - 7.12.9
+
+// Require LLVM with DW_TAG_variant_part and a gdb that can read it.
+// min-system-llvm-version: 7.0
+// min-gdb-version: 8.2
 
 // compile-flags:-g
 
 // gdb-command:run
 
 // gdb-command:print stack_unique.value
 // gdb-check:$1 = 0
-// gdbg-command:print stack_unique.next.RUST$ENCODED$ENUM$0$Empty.val->value
 // gdbr-command:print stack_unique.next.val.value
 // gdb-check:$2 = 1
 
-// gdbg-command:print unique_unique->value
 // gdbr-command:print unique_unique.value
 // gdb-check:$3 = 2
-// gdbg-command:print unique_unique->next.RUST$ENCODED$ENUM$0$Empty.val->value
 // gdbr-command:print unique_unique.next.val.value
 // gdb-check:$4 = 3
 
 // gdb-command:print vec_unique[0].value
 // gdb-check:$5 = 6.5
-// gdbg-command:print vec_unique[0].next.RUST$ENCODED$ENUM$0$Empty.val->value
 // gdbr-command:print vec_unique[0].next.val.value
 // gdb-check:$6 = 7.5
 
-// gdbg-command:print borrowed_unique->value
 // gdbr-command:print borrowed_unique.value
 // gdb-check:$7 = 8.5
-// gdbg-command:print borrowed_unique->next.RUST$ENCODED$ENUM$0$Empty.val->value
 // gdbr-command:print borrowed_unique.next.val.value
 // gdb-check:$8 = 9.5
 
 // LONG CYCLE
 // gdb-command:print long_cycle1.value
 // gdb-check:$9 = 20
-// gdbg-command:print long_cycle1.next->value
 // gdbr-command:print long_cycle1.next.value
 // gdb-check:$10 = 21
-// gdbg-command:print long_cycle1.next->next->value
 // gdbr-command:print long_cycle1.next.next.value
 // gdb-check:$11 = 22
-// gdbg-command:print long_cycle1.next->next->next->value
 // gdbr-command:print long_cycle1.next.next.next.value
 // gdb-check:$12 = 23
 
 // gdb-command:print long_cycle2.value
 // gdb-check:$13 = 24
-// gdbg-command:print long_cycle2.next->value
 // gdbr-command:print long_cycle2.next.value
 // gdb-check:$14 = 25
-// gdbg-command:print long_cycle2.next->next->value
 // gdbr-command:print long_cycle2.next.next.value
 // gdb-check:$15 = 26
 
 // gdb-command:print long_cycle3.value
 // gdb-check:$16 = 27
-// gdbg-command:print long_cycle3.next->value
 // gdbr-command:print long_cycle3.next.value
 // gdb-check:$17 = 28
 
 // gdb-command:print long_cycle4.value
 // gdb-check:$18 = 29.5
 
-// gdbg-command:print (*****long_cycle_w_anonymous_types).value
 // gdbr-command:print long_cycle_w_anonymous_types.value
 // gdb-check:$19 = 30
 
-// gdbg-command:print (*****((*****long_cycle_w_anonymous_types).next.RUST$ENCODED$ENUM$0$Empty.val)).value
 // gdbr-command:print long_cycle_w_anonymous_types.next.val.value
 // gdb-check:$20 = 31
 

src/test/debuginfo/struct-style-enum.rs

@@ -10,7 +10,10 @@
 
 // ignore-tidy-linelength
 // min-lldb-version: 310
-// ignore-gdb-version: 7.11.90 - 7.12.9
+
+// Require LLVM with DW_TAG_variant_part and a gdb that can read it.
+// min-system-llvm-version: 7.0
+// min-gdb-version: 8.2
 
 // compile-flags:-g
 
@@ -20,19 +23,15 @@
 // gdb-command:run
 
 // gdb-command:print case1
-// gdbg-check:$1 = {{RUST$ENUM$DISR = Case1, a = 0, b = 31868, c = 31868, d = 31868, e = 31868}, {RUST$ENUM$DISR = Case1, [...]}, {RUST$ENUM$DISR = Case1, [...]}}
 // gdbr-check:$1 = struct_style_enum::Regular::Case1{a: 0, b: 31868, c: 31868, d: 31868, e: 31868}
 
 // gdb-command:print case2
-// gdbg-check:$2 = {{RUST$ENUM$DISR = Case2, [...]}, {RUST$ENUM$DISR = Case2, a = 0, b = 286331153, c = 286331153}, {RUST$ENUM$DISR = Case2, [...]}}
 // gdbr-check:$2 = struct_style_enum::Regular::Case2{a: 0, b: 286331153, c: 286331153}
 
 // gdb-command:print case3
-// gdbg-check:$3 = {{RUST$ENUM$DISR = Case3, [...]}, {RUST$ENUM$DISR = Case3, [...]}, {RUST$ENUM$DISR = Case3, a = 0, b = 6438275382588823897}}
 // gdbr-check:$3 = struct_style_enum::Regular::Case3{a: 0, b: 6438275382588823897}
 
 // gdb-command:print univariant
-// gdbg-check:$4 = {{a = -1}}
 // gdbr-check:$4 = struct_style_enum::Univariant::TheOnlyCase{a: -1}
 
 

src/test/debuginfo/tuple-style-enum.rs

@@ -10,7 +10,10 @@
 
 // ignore-tidy-linelength
 // min-lldb-version: 310
-// ignore-gdb-version: 7.11.90 - 7.12.9
+
+// Require LLVM with DW_TAG_variant_part and a gdb that can read it.
+// min-system-llvm-version: 7.0
+// min-gdb-version: 8.2
 
 // compile-flags:-g
 
@@ -20,19 +23,15 @@
 // gdb-command:run
 
 // gdb-command:print case1
-// gdbg-check:$1 = {{RUST$ENUM$DISR = Case1, __0 = 0, __1 = 31868, __2 = 31868, __3 = 31868, __4 = 31868}, {RUST$ENUM$DISR = Case1, [...]}, {RUST$ENUM$DISR = Case1, [...]}}
 // gdbr-check:$1 = tuple_style_enum::Regular::Case1(0, 31868, 31868, 31868, 31868)
 
 // gdb-command:print case2
-// gdbg-check:$2 = {{RUST$ENUM$DISR = Case2, [...]}, {RUST$ENUM$DISR = Case2, __0 = 0, __1 = 286331153, __2 = 286331153}, {RUST$ENUM$DISR = Case2, [...]}}
 // gdbr-check:$2 = tuple_style_enum::Regular::Case2(0, 286331153, 286331153)
 
 // gdb-command:print case3
-// gdbg-check:$3 = {{RUST$ENUM$DISR = Case3, [...]}, {RUST$ENUM$DISR = Case3, [...]}, {RUST$ENUM$DISR = Case3, __0 = 0, __1 = 6438275382588823897}}
 // gdbr-check:$3 = tuple_style_enum::Regular::Case3(0, 6438275382588823897)
 
 // gdb-command:print univariant
-// gdbg-check:$4 = {{__0 = -1}}
 // gdbr-check:$4 = tuple_style_enum::Univariant::TheOnlyCase(-1)
 
 

src/test/debuginfo/unique-enum.rs

@@ -10,7 +10,10 @@
 
 // ignore-tidy-linelength
 // min-lldb-version: 310
-// ignore-gdb-version: 7.11.90 - 7.12.9
+
+// Require LLVM with DW_TAG_variant_part and a gdb that can read it.
+// min-system-llvm-version: 7.0
+// min-gdb-version: 8.2
 
 // compile-flags:-g
 
@@ -19,15 +22,12 @@
 // gdb-command:run
 
 // gdb-command:print *the_a
-// gdbg-check:$1 = {{RUST$ENUM$DISR = TheA, x = 0, y = 8970181431921507452}, {RUST$ENUM$DISR = TheA, [...]}}
 // gdbr-check:$1 = unique_enum::ABC::TheA{x: 0, y: 8970181431921507452}
 
 // gdb-command:print *the_b
-// gdbg-check:$2 = {{RUST$ENUM$DISR = TheB, [...]}, {RUST$ENUM$DISR = TheB, __0 = 0, __1 = 286331153, __2 = 286331153}}
 // gdbr-check:$2 = unique_enum::ABC::TheB(0, 286331153, 286331153)
 
 // gdb-command:print *univariant
-// gdbg-check:$3 = {{__0 = 123234}}
 // gdbr-check:$3 = unique_enum::Univariant::TheOnlyCase(123234)