[Ubsan][Driver] Remove UBSAN C++ runtime from other sanitizers #121006
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@llvm/pr-subscribers-clang-driver @llvm/pr-subscribers-clang Author: Vitaly Buka (vitalybuka) ChangesLinking this runtime requires C++ ABI, which breaks -nostdlib++ builds. Unblocks #120370. Full diff: https://github.com/llvm/llvm-project/pull/121006.diff 9 Files Affected:
diff --git a/clang/include/clang/Driver/SanitizerArgs.h b/clang/include/clang/Driver/SanitizerArgs.h
index 7410ad4303011c..3b275092bbbe86 100644
--- a/clang/include/clang/Driver/SanitizerArgs.h
+++ b/clang/include/clang/Driver/SanitizerArgs.h
@@ -99,6 +99,7 @@ class SanitizerArgs {
}
bool needsFuzzerInterceptors() const;
bool needsUbsanRt() const;
+ bool needsUbsanCXXRt() const;
bool requiresMinimalRuntime() const { return MinimalRuntime; }
bool needsDfsanRt() const { return Sanitizers.has(SanitizerKind::DataFlow); }
bool needsSafeStackRt() const { return SafeStackRuntime; }
diff --git a/clang/lib/Driver/SanitizerArgs.cpp b/clang/lib/Driver/SanitizerArgs.cpp
index 7726e464f2b458..98116e2c8336b8 100644
--- a/clang/lib/Driver/SanitizerArgs.cpp
+++ b/clang/lib/Driver/SanitizerArgs.cpp
@@ -338,6 +338,14 @@ bool SanitizerArgs::needsUbsanRt() const {
CoverageFeatures;
}
+bool SanitizerArgs::needsUbsanCXXRt() const {
+ // Link UBSAN C++ runtime very selectively, as it's needed in only very
+ // specific cases, but forces the program to depend on C++ ABI. UBSAN C++
+ // runtime is not included with other sanitizers.
+ return static_cast<bool>(Sanitizers.Mask & NeedsUbsanCxxRt &
+ ~TrapSanitizers.Mask);
+}
+
bool SanitizerArgs::needsCfiRt() const {
return !(Sanitizers.Mask & SanitizerKind::CFI & ~TrapSanitizers.Mask) &&
CfiCrossDso && !ImplicitCfiRuntime;
diff --git a/clang/lib/Driver/ToolChains/CommonArgs.cpp b/clang/lib/Driver/ToolChains/CommonArgs.cpp
index e33fa443b3a0ec..f8f751cb6a66d5 100644
--- a/clang/lib/Driver/ToolChains/CommonArgs.cpp
+++ b/clang/lib/Driver/ToolChains/CommonArgs.cpp
@@ -1454,6 +1454,7 @@ collectSanitizerRuntimes(const ToolChain &TC, const ArgList &Args,
SmallVectorImpl<StringRef> &NonWholeStaticRuntimes,
SmallVectorImpl<StringRef> &HelperStaticRuntimes,
SmallVectorImpl<StringRef> &RequiredSymbols) {
+ assert(!TC.getTriple().isOSDarwin() && "it's not used by Darwin");
const SanitizerArgs &SanArgs = TC.getSanitizerArgs(Args);
// Collect shared runtimes.
if (SanArgs.needsSharedRt()) {
@@ -1574,7 +1575,7 @@ collectSanitizerRuntimes(const ToolChain &TC, const ArgList &Args,
StaticRuntimes.push_back("cfi_diag");
}
if (SanArgs.linkCXXRuntimes() && !SanArgs.requiresMinimalRuntime() &&
- ((!SanArgs.needsSharedRt() && SanArgs.needsUbsanRt()) ||
+ ((!SanArgs.needsSharedRt() && SanArgs.needsUbsanCXXRt()) ||
SanArgs.needsCfiDiagRt())) {
StaticRuntimes.push_back("ubsan_standalone_cxx");
}
diff --git a/compiler-rt/lib/asan/CMakeLists.txt b/compiler-rt/lib/asan/CMakeLists.txt
index 5ec995ae159b73..a2c15806f81a28 100644
--- a/compiler-rt/lib/asan/CMakeLists.txt
+++ b/compiler-rt/lib/asan/CMakeLists.txt
@@ -260,7 +260,6 @@ else()
STATIC
ARCHS ${ASAN_SUPPORTED_ARCH}
OBJECT_LIBS RTAsan_cxx
- RTUbsan_cxx
CFLAGS ${ASAN_CFLAGS}
DEFS ${ASAN_COMMON_DEFINITIONS}
PARENT_TARGET asan)
@@ -319,7 +318,6 @@ else()
# add_dependencies(clang_rt.asan-dynamic-${arch} clang_rt.asan-dynamic-${arch}-version-list)
# generates an order-only dependency in ninja.
RTAsan_dynamic_version_script_dummy
- RTUbsan_cxx
${ASAN_DYNAMIC_WEAK_INTERCEPTION}
CFLAGS ${ASAN_DYNAMIC_CFLAGS}
LINK_FLAGS ${ASAN_DYNAMIC_LINK_FLAGS}
diff --git a/compiler-rt/lib/asan/tests/CMakeLists.txt b/compiler-rt/lib/asan/tests/CMakeLists.txt
index 998e0ff24efa40..d80a9f11e50eed 100644
--- a/compiler-rt/lib/asan/tests/CMakeLists.txt
+++ b/compiler-rt/lib/asan/tests/CMakeLists.txt
@@ -275,8 +275,7 @@ if(COMPILER_RT_CAN_EXECUTE_TESTS AND NOT ANDROID)
$<TARGET_OBJECTS:RTSanitizerCommonSymbolizer.${arch}>
$<TARGET_OBJECTS:RTSanitizerCommonSymbolizerInternal.${arch}>
$<TARGET_OBJECTS:RTLSanCommon.${arch}>
- $<TARGET_OBJECTS:RTUbsan.${arch}>
- $<TARGET_OBJECTS:RTUbsan_cxx.${arch}>)
+ $<TARGET_OBJECTS:RTUbsan.${arch}>)
endif()
add_library(${ASAN_TEST_RUNTIME} STATIC ${ASAN_TEST_RUNTIME_OBJECTS})
set_target_properties(${ASAN_TEST_RUNTIME} PROPERTIES
@@ -302,8 +301,7 @@ if(ANDROID)
$<TARGET_OBJECTS:RTSanitizerCommonSymbolizer.${arch}>
$<TARGET_OBJECTS:RTSanitizerCommonSymbolizerInternal.${arch}>
$<TARGET_OBJECTS:RTLSanCommon.${arch}>
- $<TARGET_OBJECTS:RTUbsan.${arch}>
- $<TARGET_OBJECTS:RTUbsan_cxx.${arch}>
+ $<TARGET_OBJECTS:RTUbsan.${arch}>>
${COMPILER_RT_GTEST_SOURCE}
${ASAN_NOINST_TEST_SOURCES})
set_target_compile_flags(AsanNoinstTest ${ASAN_UNITTEST_COMMON_CFLAGS})
diff --git a/compiler-rt/lib/hwasan/CMakeLists.txt b/compiler-rt/lib/hwasan/CMakeLists.txt
index afafa0c4a92761..4372603b45a486 100644
--- a/compiler-rt/lib/hwasan/CMakeLists.txt
+++ b/compiler-rt/lib/hwasan/CMakeLists.txt
@@ -188,7 +188,6 @@ function(add_hwasan_runtimes arch use_aliases)
STATIC
ARCHS ${arch}
OBJECT_LIBS RTHwasan_cxx
- RTUbsan_cxx
CFLAGS ${hwasan_rtl_flags}
PARENT_TARGET hwasan)
@@ -220,7 +219,6 @@ function(add_hwasan_runtimes arch use_aliases)
RTSanitizerCommonSymbolizerInternal
RTLSanCommon
RTUbsan
- RTUbsan_cxx
# The only purpose of RTHWAsan_dynamic_version_script_dummy is to
# carry a dependency of the shared runtime on the version script.
# Replacing it with a straightforward
diff --git a/compiler-rt/lib/msan/CMakeLists.txt b/compiler-rt/lib/msan/CMakeLists.txt
index b9976b258deb23..a0b9c61584c98d 100644
--- a/compiler-rt/lib/msan/CMakeLists.txt
+++ b/compiler-rt/lib/msan/CMakeLists.txt
@@ -66,7 +66,6 @@ foreach(arch ${MSAN_SUPPORTED_ARCH})
STATIC
ARCHS ${arch}
SOURCES ${MSAN_RTL_CXX_SOURCES}
- $<TARGET_OBJECTS:RTUbsan_cxx.${arch}>
ADDITIONAL_HEADERS ${MSAN_RTL_HEADERS}
CFLAGS ${MSAN_RTL_CFLAGS}
PARENT_TARGET msan)
diff --git a/compiler-rt/lib/tsan/rtl/CMakeLists.txt b/compiler-rt/lib/tsan/rtl/CMakeLists.txt
index f40e72dbde1f98..d7d84706bfd58f 100644
--- a/compiler-rt/lib/tsan/rtl/CMakeLists.txt
+++ b/compiler-rt/lib/tsan/rtl/CMakeLists.txt
@@ -259,7 +259,6 @@ else()
STATIC
ARCHS ${arch}
SOURCES ${TSAN_CXX_SOURCES}
- $<TARGET_OBJECTS:RTUbsan_cxx.${arch}>
ADDITIONAL_HEADERS ${TSAN_HEADERS}
CFLAGS ${TSAN_RTL_CFLAGS}
PARENT_TARGET tsan)
diff --git a/compiler-rt/test/asan/TestCases/Linux/interface_symbols_linux.cpp b/compiler-rt/test/asan/TestCases/Linux/interface_symbols_linux.cpp
index 2d729497548d90..60ef0e5b0de6fa 100644
--- a/compiler-rt/test/asan/TestCases/Linux/interface_symbols_linux.cpp
+++ b/compiler-rt/test/asan/TestCases/Linux/interface_symbols_linux.cpp
@@ -23,6 +23,8 @@
// RUN: | grep -v "__sanitizer_weak_hook" \
// RUN: | grep -v "__sanitizer_override_function" \
// RUN: | grep -v "__sanitizer_override_function_by_addr" \
+// RUN: | grep -v "__ubsan_handle_dynamic_type_cache_miss" \
+// RUN: | grep -v "__ubsan_handle_dynamic_type_cache_miss_abort" \
// RUN: | grep -v "__sanitizer_register_weak_function" \
// RUN: | sed -e "s/.*(//" -e "s/).*//" > %t.imports
//
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kstoimenov
approved these changes
Dec 23, 2024
MaskRay
approved these changes
Dec 24, 2024
vitalybuka
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users/vitalybuka/spr/ubsandriver-remove-ubsan-c-runtime-from-other-sanitizers
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LLVM Buildbot has detected a new failure on builder Full details are available at: https://lab.llvm.org/buildbot/#/builders/186/builds/5155 Here is the relevant piece of the build log for the reference |
Collaborator
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LLVM Buildbot has detected a new failure on builder Full details are available at: https://lab.llvm.org/buildbot/#/builders/13/builds/4296 Here is the relevant piece of the build log for the reference |
vitalybuka
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Dec 25, 2024
It's should be enough to provide weak implementation. Fixes solaris and android linking after #121006.
vitalybuka
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Dec 25, 2024
There is no shared version RTUbsan_cxx. Fix android after #121006.
Member
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This change broke compiler-rt tests on mingw/i686 - have a look: https://github.com/mstorsjo/llvm-mingw/actions/runs/12487763901/job/34855514237 I haven't had time to dig in to understand what's really happening here, but I have pinpointed the failures to this specific commit by rerunning a similar build+test pipeline both with this commit and the preceding one. |
Member
It seems like this did run successfully in the next nightly, https://github.com/mstorsjo/llvm-mingw/actions/runs/12498011754/job/34877696509 - I presume this was fixed by #121082 and 32962f2. Thanks! |
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Linking this runtime requires C++ ABI, which breaks -nostdlib++ builds.
However, UBSAN C++ runtime is only needed for CFI and VPTR checks.
Unblocks #120370.