[lldb/test] Add basic ld.lld --debug-names tests

[MaskRay]

Test that ld.lld --debug-names (#86508) built per-module index can be
consumed by lldb. This has uncovered a bug during the development of the
lld feature.

[MaskRay]

This is not for review yet. When ld.lld --debug-names is added, this PR will be changed to add a few lines to lldb/test/Shell/SymbolFile/DWARF/x86 tests.

[llvmbot]

@llvm/pr-subscribers-lldb

Author: Fangrui Song (MaskRay)

Changes

Test that ld.lld --debug-names (#86508) built per-module index can be
consumed by lldb. This has uncovered a bug during the development of the
lld feature.

---

Full diff: https://github.com/llvm/llvm-project/pull/88335.diff

2 Files Affected:

• (modified) lldb/test/Shell/SymbolFile/DWARF/x86/find-basic-function.cpp (+5)
• (modified) lldb/test/Shell/SymbolFile/DWARF/x86/find-basic-variable.cpp (+5)

diff --git a/lldb/test/Shell/SymbolFile/DWARF/x86/find-basic-function.cpp b/lldb/test/Shell/SymbolFile/DWARF/x86/find-basic-function.cpp
index 30143a41d5e734..b9a63525d0711d 100644
--- a/lldb/test/Shell/SymbolFile/DWARF/x86/find-basic-function.cpp
+++ b/lldb/test/Shell/SymbolFile/DWARF/x86/find-basic-function.cpp
@@ -59,6 +59,11 @@
 // RUN: lldb-test symbols --name=not_there --find=function %t | \
 // RUN:   FileCheck --check-prefix=EMPTY %s
 
+/// Test a per-module index built by lld.
+// RUN: ld.lld --debug-names %t.o -o %t
+// RUN: lldb-test symbols --name=foo --find=function --function-flags=base %t | \
+// RUN:   FileCheck --check-prefix=BASE %s
+
 // NAMES: Name: .debug_names
 
 // BASE: Found 4 functions:
diff --git a/lldb/test/Shell/SymbolFile/DWARF/x86/find-basic-variable.cpp b/lldb/test/Shell/SymbolFile/DWARF/x86/find-basic-variable.cpp
index 98b4097cdda01f..e46fa14489d32d 100644
--- a/lldb/test/Shell/SymbolFile/DWARF/x86/find-basic-variable.cpp
+++ b/lldb/test/Shell/SymbolFile/DWARF/x86/find-basic-variable.cpp
@@ -33,6 +33,11 @@
 // RUN: lldb-test symbols --name=not_there --find=variable %t | \
 // RUN:   FileCheck --check-prefix=EMPTY %s
 
+/// Test a per-module index built by lld.
+// RUN: ld.lld --debug-names %t.o -o %t
+// RUN: lldb-test symbols --name=foo --find=variable --context=context %t | \
+// RUN:   FileCheck --check-prefix=CONTEXT %s
+
 // NAMES: Name: .debug_names
 
 // EMPTY: Found 0 variables:

[dwblaikie]

looks approximately right to me, but wouldn't' mind a set of eyes more familiar with lldb to take a look