llvmbot wrote:

<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-lldb

Author: Vladislav Dzhidzhoev (dzhidzhoev)

<details>
<summary>Changes</summary>

Some tests from 'import-std-module' used to fail on the builder 
https://lab.llvm.org/staging/#/builders/195/builds/4470, since libcxx is set up 
to be linked statically with test binaries on it.

Thus, they were temporarily disabled in #<!-- -->112530. Here, this commit is 
reverted.

When libcxx is linked with a program as an archive of static libraries, 
functions that aren't used in the program are omitted. Then, jitted expressions 
from the tests try calling several functions that aren't present in the process 
image, which causes the failure.

Here, --whole-archive linker flags are added to tests' Makefiles to ensure that 
the whole libc++ is included during static linking. It's applied only to -lc++ 
and -lc++abi (via --push-state/--pop-state), since for some reason clang Gnu 
toolchain driver on certain Linux configurations adds -libclang_rt.builtins 
twice, so we can't just apply --whole-archive to all static libraries.

Flags in Makefile.rules and tests' Makefiles are changed to supported the 
configuration when libc++, libc++abi and libunwind are linked separately (this 
configuration will be enabled on lldb remote buildbots to be able to control 
what we link with and avoid duplicate symbols errors).

'-nostdlib++ -nostdinc' are added to LDFLAGS in Makefile.rules to avoid 
duplicate symbols error. Applying them only to CXXFLAGS is not enough since 
thus they are not passed to the linker call.

'--libcxx-include-dir' flag passing has been fixed on Windows host for remote 
platform in lldb/test/API/lit.cfg.py.

---
Full diff: https://github.com/llvm/llvm-project/pull/118986.diff


8 Files Affected:

- (modified) lldb/packages/Python/lldbsuite/test/make/Makefile.rules (+2-2) 
- (modified) lldb/test/API/commands/expression/import-std-module/array/Makefile 
(+5) 
- (modified) 
lldb/test/API/commands/expression/import-std-module/deque-dbg-info-content/Makefile
 (+5) 
- (modified) 
lldb/test/API/commands/expression/import-std-module/list-dbg-info-content/Makefile
 (+5) 
- (modified) 
lldb/test/API/commands/expression/import-std-module/vector-dbg-info-content/Makefile
 (+5) 
- (modified) 
lldb/test/API/commands/expression/import-std-module/vector-of-vectors/Makefile 
(+5) 
- (modified) lldb/test/API/lit.cfg.py (+2-1) 
- (modified) lldb/test/Shell/helper/toolchain.py (+1) 


``````````diff
diff --git a/lldb/packages/Python/lldbsuite/test/make/Makefile.rules 
b/lldb/packages/Python/lldbsuite/test/make/Makefile.rules
index d0045ac9f91a77..3972fa5da7faf5 100644
--- a/lldb/packages/Python/lldbsuite/test/make/Makefile.rules
+++ b/lldb/packages/Python/lldbsuite/test/make/Makefile.rules
@@ -368,7 +368,7 @@ ifeq (,$(filter 1, $(USE_LIBSTDCPP) $(USE_LIBCPP) 
$(USE_SYSTEM_STDLIB)))
     ifneq "$(LIBCPP_INCLUDE_TARGET_DIR)" ""
       CXXFLAGS += -cxx-isystem $(LIBCPP_INCLUDE_TARGET_DIR)
     endif
-    LDFLAGS += -L$(LIBCPP_LIBRARY_DIR) -Wl,-rpath,$(LIBCPP_LIBRARY_DIR) -lc++
+    LDFLAGS += -L$(LIBCPP_LIBRARY_DIR) -Wl,-rpath,$(LIBCPP_LIBRARY_DIR) -lc++ 
-lc++abi
   else
     USE_SYSTEM_STDLIB := 1
   endif
@@ -389,7 +389,7 @@ ifeq (1,$(USE_LIBCPP))
                ifneq "$(LIBCPP_INCLUDE_TARGET_DIR)" ""
                                CXXFLAGS += -cxx-isystem 
$(LIBCPP_INCLUDE_TARGET_DIR)
                endif
-               LDFLAGS += -L$(LIBCPP_LIBRARY_DIR) 
-Wl,-rpath,$(LIBCPP_LIBRARY_DIR) -lc++
+               LDFLAGS += -nostdlib++ -nostdinc -L$(LIBCPP_LIBRARY_DIR) 
-Wl,-rpath,$(LIBCPP_LIBRARY_DIR) -lc++ -lc++abi
        else
                ifeq "$(OS)" "Android"
                                # Nothing to do, this is already handled in
diff --git a/lldb/test/API/commands/expression/import-std-module/array/Makefile 
b/lldb/test/API/commands/expression/import-std-module/array/Makefile
index f938f7428468ab..6f0d77235b59de 100644
--- a/lldb/test/API/commands/expression/import-std-module/array/Makefile
+++ b/lldb/test/API/commands/expression/import-std-module/array/Makefile
@@ -1,3 +1,8 @@
 USE_LIBCPP := 1
 CXX_SOURCES := main.cpp
+
+ifneq ($(OS),Darwin)
+       LDFLAGS := -Xlinker --push-state -Xlinker --whole-archive -lc++ 
-lc++abi -Xlinker --pop-state
+endif
+
 include Makefile.rules
diff --git 
a/lldb/test/API/commands/expression/import-std-module/deque-dbg-info-content/Makefile
 
b/lldb/test/API/commands/expression/import-std-module/deque-dbg-info-content/Makefile
index f938f7428468ab..6f0d77235b59de 100644
--- 
a/lldb/test/API/commands/expression/import-std-module/deque-dbg-info-content/Makefile
+++ 
b/lldb/test/API/commands/expression/import-std-module/deque-dbg-info-content/Makefile
@@ -1,3 +1,8 @@
 USE_LIBCPP := 1
 CXX_SOURCES := main.cpp
+
+ifneq ($(OS),Darwin)
+       LDFLAGS := -Xlinker --push-state -Xlinker --whole-archive -lc++ 
-lc++abi -Xlinker --pop-state
+endif
+
 include Makefile.rules
diff --git 
a/lldb/test/API/commands/expression/import-std-module/list-dbg-info-content/Makefile
 
b/lldb/test/API/commands/expression/import-std-module/list-dbg-info-content/Makefile
index f938f7428468ab..6f0d77235b59de 100644
--- 
a/lldb/test/API/commands/expression/import-std-module/list-dbg-info-content/Makefile
+++ 
b/lldb/test/API/commands/expression/import-std-module/list-dbg-info-content/Makefile
@@ -1,3 +1,8 @@
 USE_LIBCPP := 1
 CXX_SOURCES := main.cpp
+
+ifneq ($(OS),Darwin)
+       LDFLAGS := -Xlinker --push-state -Xlinker --whole-archive -lc++ 
-lc++abi -Xlinker --pop-state
+endif
+
 include Makefile.rules
diff --git 
a/lldb/test/API/commands/expression/import-std-module/vector-dbg-info-content/Makefile
 
b/lldb/test/API/commands/expression/import-std-module/vector-dbg-info-content/Makefile
index f938f7428468ab..6f0d77235b59de 100644
--- 
a/lldb/test/API/commands/expression/import-std-module/vector-dbg-info-content/Makefile
+++ 
b/lldb/test/API/commands/expression/import-std-module/vector-dbg-info-content/Makefile
@@ -1,3 +1,8 @@
 USE_LIBCPP := 1
 CXX_SOURCES := main.cpp
+
+ifneq ($(OS),Darwin)
+       LDFLAGS := -Xlinker --push-state -Xlinker --whole-archive -lc++ 
-lc++abi -Xlinker --pop-state
+endif
+
 include Makefile.rules
diff --git 
a/lldb/test/API/commands/expression/import-std-module/vector-of-vectors/Makefile
 
b/lldb/test/API/commands/expression/import-std-module/vector-of-vectors/Makefile
index f938f7428468ab..6f0d77235b59de 100644
--- 
a/lldb/test/API/commands/expression/import-std-module/vector-of-vectors/Makefile
+++ 
b/lldb/test/API/commands/expression/import-std-module/vector-of-vectors/Makefile
@@ -1,3 +1,8 @@
 USE_LIBCPP := 1
 CXX_SOURCES := main.cpp
+
+ifneq ($(OS),Darwin)
+       LDFLAGS := -Xlinker --push-state -Xlinker --whole-archive -lc++ 
-lc++abi -Xlinker --pop-state
+endif
+
 include Makefile.rules
diff --git a/lldb/test/API/lit.cfg.py b/lldb/test/API/lit.cfg.py
index 06c685ebc3f5a5..320e6c94976ffc 100644
--- a/lldb/test/API/lit.cfg.py
+++ b/lldb/test/API/lit.cfg.py
@@ -4,6 +4,7 @@
 
 import os
 import platform
+import re
 import shlex
 import shutil
 import subprocess
@@ -211,7 +212,7 @@ def delete_module_cache(path):
 
 # If we have a just-built libcxx, prefer it over the system one.
 if is_configured("has_libcxx") and config.has_libcxx:
-    if platform.system() != "Windows":
+    if platform.system() != "Windows" or re.match(r".*-linux.*", 
config.target_triple):
         if is_configured("libcxx_include_dir") and 
is_configured("libcxx_libs_dir"):
             dotest_cmd += ["--libcxx-include-dir", config.libcxx_include_dir]
             if is_configured("libcxx_include_target_dir"):
diff --git a/lldb/test/Shell/helper/toolchain.py 
b/lldb/test/Shell/helper/toolchain.py
index 42968128f27026..a62f6f4ec52cbf 100644
--- a/lldb/test/Shell/helper/toolchain.py
+++ b/lldb/test/Shell/helper/toolchain.py
@@ -239,6 +239,7 @@ def use_support_substitutions(config):
         host_flags += [
             "-L{}".format(config.libcxx_libs_dir),
             "-lc++",
+            "-lc++abi",
         ]
 
     host_flags = " ".join(host_flags)

``````````

</details>


https://github.com/llvm/llvm-project/pull/118986
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