[libunwind] Add a from-scratch config for running libunwind tests

Running tests for libunwind is a lot simpler than running tests for
libc++, so a simple Lit config file is sufficient. The benefit is that
we disentangle the libunwind test configuration from the libc++ and
libc++abi test configuration. The setup was too complicated, which led
to some bugs (notably we were running against the system libunwind on
Apple platforms).

Differential Revision: https://reviews.llvm.org/D111664

libcxx/utils/ci/run-buildbot

@@ -199,102 +199,117 @@ check-generated-output)
 generic-cxx03)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-cxx03.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
     check-abi-list
 ;;
 generic-cxx11)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-cxx11.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
     check-abi-list
 ;;
 generic-cxx14)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-cxx14.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
     check-abi-list
 ;;
 generic-cxx17)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-cxx17.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
     check-abi-list
 ;;
 generic-cxx20)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-cxx20.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
     check-abi-list
 ;;
 generic-cxx2b)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-cxx2b.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
     check-abi-list
 ;;
 generic-assertions)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-assertions.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
     check-abi-list
 ;;
 generic-debug-iterators)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-debug-iterators.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
     check-abi-list
 ;;
 generic-noexceptions)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-noexceptions.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
 ;;
 generic-modules)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-modules.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
 ;;
 generic-static)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-static.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-static.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-static.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-static.cfg.in"
     check-runtimes
 ;;
 generic-32bit)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-32bits.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
 ;;
 generic-clang-11)
     export CC=clang-11
     export CXX=clang++-11
     clean
-    generate-cmake -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+    generate-cmake -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
 ;;
 generic-clang-12)
     export CC=clang-12
     export CXX=clang++-12
     clean
-    generate-cmake -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+    generate-cmake -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
 ;;
 generic-gcc)
     export CC=gcc-11
     export CXX=g++-11
     clean
-    generate-cmake -DLIBCXX_TEST_CONFIG="llvm-libc++-shared-gcc.cfg.in"
+    generate-cmake -DLIBCXX_TEST_CONFIG="llvm-libc++-shared-gcc.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
 ;;
 generic-gcc-cxx11)
@@ -302,79 +317,92 @@ generic-gcc-cxx11)
     export CXX=g++-11
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-cxx11.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared-gcc.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared-gcc.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
 ;;
 generic-asan)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-asan.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
 ;;
 generic-msan)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-msan.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
 ;;
 generic-tsan)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-tsan.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
 ;;
 generic-ubsan)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-ubsan.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
 ;;
 generic-with_llvm_unwinder)
     clean
     generate-cmake -DLIBCXXABI_USE_LLVM_UNWINDER=ON \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
 ;;
 generic-singlethreaded)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-singlethreaded.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
 ;;
 generic-no-debug)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-no-debug.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
 ;;
 generic-no-filesystem)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-no-filesystem.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
 ;;
 generic-no-random_device)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-no-random_device.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
 ;;
 generic-no-localization)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-no-localization.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
 ;;
 generic-no-unicode)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-no-unicode.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
 ;;
 generic-no-wide-characters)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-no-wide-characters.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
 ;;
 apple-system)
@@ -427,7 +455,8 @@ apple-system-backdeployment-*)
 ;;
 benchmarks)
     clean
-    generate-cmake -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+    generate-cmake -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-cxx-benchmarks
 ;;
 documentation)
@@ -456,7 +485,8 @@ runtimes-build)
           -DLLVM_RUNTIME_TARGETS="x86_64-unknown-linux-gnu" \
           -DLLVM_ENABLE_ASSERTIONS=ON \
           -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-modules.cmake" \
-          -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+          -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+          -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
 
     echo "+++ Running the libc++ and libc++abi tests"
     ${NINJA} -C "${BUILD_DIR}" check-runtimes
@@ -528,7 +558,8 @@ legacy-standalone)
 aarch64)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/AArch64.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
 ;;
 aarch64-noexceptions)
@@ -536,33 +567,38 @@ aarch64-noexceptions)
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/AArch64.cmake" \
                    -DLIBCXX_ENABLE_EXCEPTIONS=OFF \
                    -DLIBCXXABI_ENABLE_EXCEPTIONS=OFF \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
 ;;
 # Aka Armv8 32 bit
 armv8)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Armv8Arm.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
 ;;
 armv8-noexceptions)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Armv8Thumb-noexceptions.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
 ;;
 # Armv7 32 bit. One building Arm only one Thumb only code.
 armv7)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Armv7Arm.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
 ;;
 armv7-noexceptions)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Armv7Thumb-noexceptions.cmake" \
-                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
+                   -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in" \
+                   -DLIBUNWIND_TEST_CONFIG="llvm-libunwind-shared.cfg.in"
     check-runtimes
 ;;
 windows-dll)

libcxx/utils/libcxx/test/dsl.py

@@ -194,15 +194,20 @@ def compilerMacros(config, flags=''):
 
   If the optional `flags` argument (a string) is provided, these flags will
   be added to the compiler invocation when generating the macros.
+
+  If we fail to extract the compiler macros because of a compiler error, None
+  is returned instead.
   """
   with _makeConfigTest(config) as test:
     with open(test.getSourcePath(), 'w') as sourceFile:
       # Make sure files like <__config> are included, since they can define
       # additional macros.
-      sourceFile.write("#include <cstddef>")
+      sourceFile.write("#include <stddef.h>")
     unparsedOutput, err, exitCode, timeoutInfo = _executeScriptInternal(test, [
       "%{{cxx}} %s -dM -E %{{flags}} %{{compile_flags}} {}".format(flags)
     ])
+    if exitCode != 0:
+      return None
     parsedMacros = dict()
     defines = (l.strip() for l in unparsedOutput.split('\n') if l.startswith('#define '))
     for line in defines:

libunwind/CMakeLists.txt

@@ -89,9 +89,9 @@ set(LIBUNWIND_TEST_COMPILER_FLAGS "" CACHE STRING
     "Additional compiler flags for test programs.")
 set(LIBUNWIND_TEST_CONFIG "${CMAKE_CURRENT_SOURCE_DIR}/test/lit.site.cfg.in" CACHE STRING
   "The path to the Lit testing configuration to use when running the tests.
-   If a relative path is provided, it is assumed to be relative to '<monorepo>/libcxx/test/configs'.")
+   If a relative path is provided, it is assumed to be relative to '<monorepo>/libunwind/test/configs'.")
 if (NOT IS_ABSOLUTE "${LIBUNWIND_TEST_CONFIG}")
-  set(LIBUNWIND_TEST_CONFIG "${LIBUNWIND_LIBCXX_PATH}/test/configs/${LIBUNWIND_TEST_CONFIG}")
+  set(LIBUNWIND_TEST_CONFIG "${CMAKE_CURRENT_SOURCE_DIR}/test/configs/${LIBUNWIND_TEST_CONFIG}")
 endif()
 set(LIBUNWIND_TEST_PARAMS "" CACHE STRING
     "A list of parameters to run the Lit test suite with.")

libunwind/test/configs/llvm-libunwind-shared.cfg.in

@@ -0,0 +1,64 @@
+@AUTO_GEN_COMMENT@
+
+@SERIALIZED_LIT_PARAMS@
+
+#
+# Configuration file for running the libunwind tests against the shared library.
+#
+# This file is a lot simpler than the ones for libc++ and libc++abi because
+# while libunwind is written in C++, it doesn't use the C++ Standard Library
+# so we don't need to set that up to run the tests correctly.
+#
+
+import os, site
+site.addsitedir(os.path.join('@LIBUNWIND_LIBCXX_PATH@', 'utils'))
+import libcxx.test.format
+
+# Basic configuration of the test suite
+config.name = os.path.basename('@LIBUNWIND_TEST_CONFIG@')
+config.test_source_root = os.path.join('@LIBUNWIND_SOURCE_DIR@', 'test')
+config.test_format = libcxx.test.format.CxxStandardLibraryTest()
+config.recursiveExpansionLimit = 10
+config.test_exec_root = '@CMAKE_BINARY_DIR@'
+
+compile_flags = []
+link_flags = []
+if @LIBUNWIND_USES_ARM_EHABI@:
+    config.available_features.add('libunwind-arm-ehabi')
+
+if not @LIBUNWIND_ENABLE_THREADS@:
+    compile_flags.append('-D_LIBUNWIND_HAS_NO_THREADS')
+    config.available_features.add('libunwind-no-threads')
+
+if @LIBUNWIND_ENABLE_CET@:
+    compile_flags.append('-fcf-protection=full')
+
+if '@CMAKE_SYSTEM_NAME@' == 'Linux':
+    link_flags.append('-Wl,--export-dynamic')
+
+# Stack unwinding tests need unwinding tables and these are not generated by default on all targets.
+compile_flags.append('-funwind-tables')
+
+config.substitutions.append(('%{cxx}', '@CMAKE_CXX_COMPILER@'))
+config.substitutions.append(('%{flags}',
+    '-isysroot {}'.format('@CMAKE_OSX_SYSROOT@') if '@CMAKE_OSX_SYSROOT@' else ''
+))
+config.substitutions.append(('%{compile_flags}',
+    '-nostdinc++ -I {}/include {}'.format('@LIBUNWIND_SOURCE_DIR@', ' '.join(compile_flags))
+))
+config.substitutions.append(('%{link_flags}',
+    '-nodefaultlibs -L {0}/lib -Wl,-rpath,{0}/lib -lunwind -ldl -lc {1}'.format('@CMAKE_BINARY_DIR@', ' '.join(link_flags))
+))
+config.substitutions.append(('%{exec}',
+    '{} {}/utils/run.py --execdir %T -- '.format(sys.executable, '@LIBUNWIND_LIBCXX_PATH@')
+))
+
+import os, site
+site.addsitedir(os.path.join('@LIBUNWIND_LIBCXX_PATH@', 'utils'))
+import libcxx.test.params, libcxx.test.newconfig, libcxx.test.newconfig
+libcxx.test.newconfig.configure(
+    libcxx.test.params.DEFAULT_PARAMETERS,
+    libcxx.test.features.DEFAULT_FEATURES,
+    config,
+    lit_config
+)

libunwind/test/configs/llvm-libunwind-static.cfg.in

@@ -0,0 +1,66 @@
+@AUTO_GEN_COMMENT@
+
+@SERIALIZED_LIT_PARAMS@
+
+#
+# Configuration file for running the libunwind tests against the static library.
+#
+# This file is a lot simpler than the ones for libc++ and libc++abi because
+# while libunwind is written in C++, it doesn't use the C++ Standard Library
+# so we don't need to set that up to run the tests correctly.
+#
+
+import os, site
+site.addsitedir(os.path.join('@LIBUNWIND_LIBCXX_PATH@', 'utils'))
+import libcxx.test.format
+
+# Basic configuration of the test suite
+config.name = os.path.basename('@LIBUNWIND_TEST_CONFIG@')
+config.test_source_root = os.path.join('@LIBUNWIND_SOURCE_DIR@', 'test')
+config.test_format = libcxx.test.format.CxxStandardLibraryTest()
+config.recursiveExpansionLimit = 10
+config.test_exec_root = '@CMAKE_BINARY_DIR@'
+
+compile_flags = []
+link_flags = []
+if @LIBUNWIND_USES_ARM_EHABI@:
+    config.available_features.add('libunwind-arm-ehabi')
+
+if not @LIBUNWIND_ENABLE_THREADS@:
+    compile_flags.append('-D_LIBUNWIND_HAS_NO_THREADS')
+    config.available_features.add('libunwind-no-threads')
+else:
+    link_flags.append('-lpthread')
+
+if @LIBUNWIND_ENABLE_CET@:
+    compile_flags.append('-fcf-protection=full')
+
+if '@CMAKE_SYSTEM_NAME@' == 'Linux':
+    link_flags.append('-Wl,--export-dynamic')
+
+# Stack unwinding tests need unwinding tables and these are not generated by default on all targets.
+compile_flags.append('-funwind-tables')
+
+config.substitutions.append(('%{cxx}', '@CMAKE_CXX_COMPILER@'))
+config.substitutions.append(('%{flags}',
+    '-isysroot {}'.format('@CMAKE_OSX_SYSROOT@') if '@CMAKE_OSX_SYSROOT@' else ''
+))
+config.substitutions.append(('%{compile_flags}',
+    '-nostdinc++ -I {}/include {}'.format('@LIBUNWIND_SOURCE_DIR@', ' '.join(compile_flags))
+))
+config.substitutions.append(('%{link_flags}',
+    '-nodefaultlibs {}/lib/libunwind.a -ldl -lc {}'.format('@CMAKE_BINARY_DIR@', ' '.join(link_flags))
+))
+config.substitutions.append(('%{exec}',
+    '{} {}/utils/run.py --execdir %T -- '.format(sys.executable, '@LIBUNWIND_LIBCXX_PATH@')
+))
+
+import os, site
+site.addsitedir(os.path.join('@LIBUNWIND_LIBCXX_PATH@', 'utils'))
+import libcxx.test.params, libcxx.test.newconfig, libcxx.test.newconfig
+libcxx.test.newconfig.configure(
+    libcxx.test.params.DEFAULT_PARAMETERS,
+    libcxx.test.features.DEFAULT_FEATURES,
+    config,
+    lit_config
+)

libunwind/test/forceunwind.pass.cpp

@@ -12,9 +12,6 @@
 // TODO: Investigate these failures
 // XFAIL: asan, tsan, ubsan
 
-// TODO: Investigate this failure
-// XFAIL: 32bits-on-64bits
-
 // Basic test for _Unwind_ForcedUnwind.
 // See libcxxabi/test/forced_unwind* tests too.
 

libunwind/test/frameheadercache_test.pass.cpp

@@ -1,9 +1,6 @@
 // TODO: Investigate these failures
 // XFAIL: asan, tsan, ubsan
 
-// TODO: Investigate this failure
-// XFAIL: 32bits-on-64bits
-
 // The other libunwind tests don't test internal interfaces, so the include path
 // is a little wonky.
 #include "../src/config.h"

libunwind/test/libunwind_01.pass.cpp

@@ -1,11 +1,8 @@
 // TODO: Investigate these failures
 // XFAIL: asan, tsan, ubsan
 
-// TODO: Investigate these failures on x86_64 macOS
+// TODO: Investigate these failures on x86_64 macOS back deployment
-// XFAIL: target=x86_64-apple-darwin{{.+}}
+// UNSUPPORTED: target=x86_64-apple-darwin{{.+}}
-
-// TODO: Investigate this failure
-// XFAIL: 32bits-on-64bits
 
 #include <libunwind.h>
 #include <stdlib.h>

libunwind/test/libunwind_02.pass.cpp

@@ -1,9 +1,6 @@
 // TODO: Investigate these failures
 // XFAIL: asan, tsan, ubsan
 
-// TODO: Investigate this failure
-// XFAIL: 32bits-on-64bits
-
 #include <assert.h>
 #include <stdlib.h>
 #include <unwind.h>

libunwind/test/signal_frame.pass.cpp

@@ -15,9 +15,6 @@
 // TODO: Investigate this failure on macOS
 // XFAIL: target={{.+}}-apple-darwin{{.+}}
 
-// TODO: Investigate this failure
-// XFAIL: 32bits-on-64bits
-
 // UNSUPPORTED: libunwind-arm-ehabi
 
 #include <assert.h>

libunwind/test/signal_unwind.pass.cpp

@@ -13,9 +13,6 @@
 // TODO: Investigate these failures
 // XFAIL: asan, tsan, ubsan
 
-// TODO: Investigate this failure
-// XFAIL: 32bits-on-64bits
-
 #include <assert.h>
 #include <dlfcn.h>
 #include <signal.h>

libunwind/test/unwind_leaffunction.pass.cpp

@@ -13,9 +13,6 @@
 // TODO: Investigate these failures
 // XFAIL: asan, tsan, ubsan
 
-// TODO: Investigate this failure
-// XFAIL: 32bits-on-64bits
-
 #include <assert.h>
 #include <dlfcn.h>
 #include <signal.h>