[DWARF] Add one more type unit test

This test passes already, but it seems interesting to test that we can
jump between type units in different dwo files nonetheless.

llvm-svn: 364890

1 files changed, 37 insertions, 0 deletions

diff --git a/lldb/lit/SymbolFile/DWARF/debug-types-dwo-cross-reference.cpp b/lldb/lit/SymbolFile/DWARF/debug-types-dwo-cross-reference.cpp
new file mode 100644
index 00000000000..29adff62cd1
--- /dev/null
+++ b/lldb/lit/SymbolFile/DWARF/debug-types-dwo-cross-reference.cpp
@@ -0,0 +1,37 @@
+// Test that we can jump from a type unit in one dwo file into a type unit in a
+// different dwo file.
+
+// REQUIRES: lld
+
+// RUN: %clang %s -target x86_64-pc-linux -fno-standalone-debug -g \
+// RUN:   -fdebug-types-section -gsplit-dwarf -c -o %t1.o -DONE
+// RUN: %clang %s -target x86_64-pc-linux -fno-standalone-debug -g \
+// RUN:   -fdebug-types-section -gsplit-dwarf -c -o %t2.o -DTWO
+// RUN: llvm-dwarfdump %t1.dwo -debug-types | FileCheck --check-prefix=ONEUNIT %s
+// RUN: llvm-dwarfdump %t2.dwo -debug-types | FileCheck --check-prefix=ONEUNIT %s
+// RUN: ld.lld %t1.o %t2.o -o %t
+// RUN: %lldb %t -o "target var a b **b.a" -b | FileCheck %s
+
+// ONEUNIT-COUNT-1: DW_TAG_type_unit
+
+// CHECK:      (const A) a = (a = 42)
+// CHECK:      (const B) b = {
+// CHECK-NEXT:   a = 0x{{.*}}
+// CHECK-NEXT: }
+// CHECK:      (const A) **b.a = (a = 42)
+
+struct A;
+
+extern const A *a_ptr;
+#ifdef ONE
+struct A {
+  int a = 42;
+};
+constexpr A a{};
+const A *a_ptr = &a;
+#else
+struct B {
+  const A **a;
+};
+extern constexpr B b{&a_ptr};
+#endif