leonardchan created this revision.
leonardchan added reviewers: phosek, mcgrathr.
leonardchan added a project: clang.
Herald added a subscriber: mgorny.
leonardchan requested review of this revision.
This adds a multilib for Fuchsia that is built with the relative vtables ABI.
This depends on https://reviews.llvm.org/D77606 which contains a change to
support dynamic_cast with the new ABI.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D85576
Files:
clang/cmake/caches/Fuchsia-stage2.cmake
clang/lib/Driver/ToolChains/Fuchsia.cpp
clang/test/Driver/Inputs/basic_fuchsia_tree/lib/aarch64-fuchsia/c++/relative-vtables/libc++.so
clang/test/Driver/Inputs/basic_fuchsia_tree/lib/x86_64-fuchsia/c++/relative-vtables/libc++.so
clang/test/Driver/fuchsia.cpp
Index: clang/test/Driver/fuchsia.cpp
===================================================================
--- clang/test/Driver/fuchsia.cpp
+++ clang/test/Driver/fuchsia.cpp
@@ -86,8 +86,14 @@
// RUN: -resource-dir=%S/Inputs/resource_dir_with_per_target_subdir \
// RUN: -fuse-ld=lld 2>&1\
// RUN: | FileCheck %s
-check-prefixes=CHECK-MULTILIB-X86,CHECK-MULTILIB-ASAN-NOEXCEPT-X86
+// RUN: %clangxx %s -### --target=x86_64-fuchsia
-fexperimental-relative-c++-abi-vtables \
+// RUN: -ccc-install-dir %S/Inputs/basic_fuchsia_tree/bin \
+// RUN: -resource-dir=%S/Inputs/resource_dir_with_per_target_subdir \
+// RUN: -fuse-ld=lld 2>&1\
+// RUN: | FileCheck %s
-check-prefixes=CHECK-MULTILIB-X86,CHECK-MULTILIB-RELATIVE-VTABLES-X86
// CHECK-MULTILIB-X86: "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
// CHECK-MULTILIB-ASAN-X86:
"-L{{.*}}{{/|\\\\}}..{{/|\\\\}}lib{{/|\\\\}}x86_64-fuchsia{{/|\\\\}}c++{{/|\\\\}}asan"
// CHECK-MULTILIB-NOEXCEPT-X86:
"-L{{.*}}{{/|\\\\}}..{{/|\\\\}}lib{{/|\\\\}}x86_64-fuchsia{{/|\\\\}}c++{{/|\\\\}}noexcept"
// CHECK-MULTILIB-ASAN-NOEXCEPT-X86:
"-L{{.*}}{{/|\\\\}}..{{/|\\\\}}lib{{/|\\\\}}x86_64-fuchsia{{/|\\\\}}c++{{/|\\\\}}asan+noexcept"
+// CHECK-MULTILIB-RELATIVE-VTABLES-X86:
"-L{{.*}}{{/|\\\\}}..{{/|\\\\}}lib{{/|\\\\}}x86_64-fuchsia{{/|\\\\}}c++{{/|\\\\}}relative-vtables"
// CHECK-MULTILIB-X86:
"-L{{.*}}{{/|\\\\}}..{{/|\\\\}}lib{{/|\\\\}}x86_64-fuchsia{{/|\\\\}}c++"
Index: clang/lib/Driver/ToolChains/Fuchsia.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Fuchsia.cpp
+++ clang/lib/Driver/ToolChains/Fuchsia.cpp
@@ -196,6 +196,9 @@
};
Multilibs.push_back(Multilib());
+ // Use the relative vtables ABI.
+ Multilibs.push_back(Multilib("relative-vtables", {}, {}, 1)
+ .flag("+fexperimental-relative-c++-abi-vtables"));
// Use the noexcept variant with -fno-exceptions to avoid the extra overhead.
Multilibs.push_back(Multilib("noexcept", {}, {}, 1)
.flag("-fexceptions")
@@ -220,6 +223,11 @@
Args.hasFlag(options::OPT_fexceptions, options::OPT_fno_exceptions,
true),
"fexceptions", Flags);
addMultilibFlag(getSanitizerArgs().needsAsanRt(), "fsanitize=address",
Flags);
+ addMultilibFlag(
+ Args.hasFlag(options::OPT_fexperimental_relative_cxx_abi_vtables,
+ options::OPT_fno_experimental_relative_cxx_abi_vtables,
+ /*default=*/false),
+ "fexperimental-relative-c++-abi-vtables", Flags);
Multilibs.setFilePathsCallback(FilePaths);
if (Multilibs.select(Flags, SelectedMultilib))
Index: clang/cmake/caches/Fuchsia-stage2.cmake
===================================================================
--- clang/cmake/caches/Fuchsia-stage2.cmake
+++ clang/cmake/caches/Fuchsia-stage2.cmake
@@ -212,14 +212,19 @@
set(RUNTIMES_${target}-unknown-fuchsia+asan+noexcept_LIBCXXABI_ENABLE_EXCEPTIONS
OFF CACHE BOOL "")
set(RUNTIMES_${target}-unknown-fuchsia+asan+noexcept_LIBCXX_ENABLE_EXCEPTIONS
OFF CACHE BOOL "")
+
set(RUNTIMES_${target}-unknown-fuchsia+relative-vtables_LLVM_BUILD_COMPILER_RT
OFF CACHE BOOL "")
+
set(RUNTIMES_${target}-unknown-fuchsia+relative-vtables_LIBCXXABI_RELATIVE_VTABLES_ABI_ENABLED
ON CACHE BOOL "")
+ set(RUNTIMES_${target}-unknown-fuchsia+relative-vtables_CMAKE_CXX_FLAGS
"${RUNTIMES_${target}-unknown-fuchsia+relative-vtables_CMAKE_CXX_FLAGS} -Xclang
-fexperimental-relative-c++-abi-vtables" CACHE STRING "")
+
# Use .build-id link.
list(APPEND RUNTIME_BUILD_ID_LINK "${target}-unknown-fuchsia")
endforeach()
- set(LLVM_RUNTIME_MULTILIBS "asan;noexcept;asan+noexcept" CACHE STRING "")
+ set(LLVM_RUNTIME_MULTILIBS "asan;noexcept;asan+noexcept;relative-vtables"
CACHE STRING "")
set(LLVM_RUNTIME_MULTILIB_asan_TARGETS
"x86_64-unknown-fuchsia;aarch64-unknown-fuchsia" CACHE STRING "")
set(LLVM_RUNTIME_MULTILIB_noexcept_TARGETS
"x86_64-unknown-fuchsia;aarch64-unknown-fuchsia" CACHE STRING "")
set(LLVM_RUNTIME_MULTILIB_asan+noexcept_TARGETS
"x86_64-unknown-fuchsia;aarch64-unknown-fuchsia" CACHE STRING "")
+ set(LLVM_RUNTIME_MULTILIB_relative-vtables_TARGETS
"x86_64-unknown-fuchsia;aarch64-unknown-fuchsia" CACHE STRING "")
endif()
set(LLVM_BUILTIN_TARGETS "${BUILTIN_TARGETS}" CACHE STRING "")
Index: clang/test/Driver/fuchsia.cpp
===================================================================
--- clang/test/Driver/fuchsia.cpp
+++ clang/test/Driver/fuchsia.cpp
@@ -86,8 +86,14 @@
// RUN: -resource-dir=%S/Inputs/resource_dir_with_per_target_subdir \
// RUN: -fuse-ld=lld 2>&1\
// RUN: | FileCheck %s -check-prefixes=CHECK-MULTILIB-X86,CHECK-MULTILIB-ASAN-NOEXCEPT-X86
+// RUN: %clangxx %s -### --target=x86_64-fuchsia -fexperimental-relative-c++-abi-vtables \
+// RUN: -ccc-install-dir %S/Inputs/basic_fuchsia_tree/bin \
+// RUN: -resource-dir=%S/Inputs/resource_dir_with_per_target_subdir \
+// RUN: -fuse-ld=lld 2>&1\
+// RUN: | FileCheck %s -check-prefixes=CHECK-MULTILIB-X86,CHECK-MULTILIB-RELATIVE-VTABLES-X86
// CHECK-MULTILIB-X86: "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
// CHECK-MULTILIB-ASAN-X86: "-L{{.*}}{{/|\\\\}}..{{/|\\\\}}lib{{/|\\\\}}x86_64-fuchsia{{/|\\\\}}c++{{/|\\\\}}asan"
// CHECK-MULTILIB-NOEXCEPT-X86: "-L{{.*}}{{/|\\\\}}..{{/|\\\\}}lib{{/|\\\\}}x86_64-fuchsia{{/|\\\\}}c++{{/|\\\\}}noexcept"
// CHECK-MULTILIB-ASAN-NOEXCEPT-X86: "-L{{.*}}{{/|\\\\}}..{{/|\\\\}}lib{{/|\\\\}}x86_64-fuchsia{{/|\\\\}}c++{{/|\\\\}}asan+noexcept"
+// CHECK-MULTILIB-RELATIVE-VTABLES-X86: "-L{{.*}}{{/|\\\\}}..{{/|\\\\}}lib{{/|\\\\}}x86_64-fuchsia{{/|\\\\}}c++{{/|\\\\}}relative-vtables"
// CHECK-MULTILIB-X86: "-L{{.*}}{{/|\\\\}}..{{/|\\\\}}lib{{/|\\\\}}x86_64-fuchsia{{/|\\\\}}c++"
Index: clang/lib/Driver/ToolChains/Fuchsia.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Fuchsia.cpp
+++ clang/lib/Driver/ToolChains/Fuchsia.cpp
@@ -196,6 +196,9 @@
};
Multilibs.push_back(Multilib());
+ // Use the relative vtables ABI.
+ Multilibs.push_back(Multilib("relative-vtables", {}, {}, 1)
+ .flag("+fexperimental-relative-c++-abi-vtables"));
// Use the noexcept variant with -fno-exceptions to avoid the extra overhead.
Multilibs.push_back(Multilib("noexcept", {}, {}, 1)
.flag("-fexceptions")
@@ -220,6 +223,11 @@
Args.hasFlag(options::OPT_fexceptions, options::OPT_fno_exceptions, true),
"fexceptions", Flags);
addMultilibFlag(getSanitizerArgs().needsAsanRt(), "fsanitize=address", Flags);
+ addMultilibFlag(
+ Args.hasFlag(options::OPT_fexperimental_relative_cxx_abi_vtables,
+ options::OPT_fno_experimental_relative_cxx_abi_vtables,
+ /*default=*/false),
+ "fexperimental-relative-c++-abi-vtables", Flags);
Multilibs.setFilePathsCallback(FilePaths);
if (Multilibs.select(Flags, SelectedMultilib))
Index: clang/cmake/caches/Fuchsia-stage2.cmake
===================================================================
--- clang/cmake/caches/Fuchsia-stage2.cmake
+++ clang/cmake/caches/Fuchsia-stage2.cmake
@@ -212,14 +212,19 @@
set(RUNTIMES_${target}-unknown-fuchsia+asan+noexcept_LIBCXXABI_ENABLE_EXCEPTIONS OFF CACHE BOOL "")
set(RUNTIMES_${target}-unknown-fuchsia+asan+noexcept_LIBCXX_ENABLE_EXCEPTIONS OFF CACHE BOOL "")
+ set(RUNTIMES_${target}-unknown-fuchsia+relative-vtables_LLVM_BUILD_COMPILER_RT OFF CACHE BOOL "")
+ set(RUNTIMES_${target}-unknown-fuchsia+relative-vtables_LIBCXXABI_RELATIVE_VTABLES_ABI_ENABLED ON CACHE BOOL "")
+ set(RUNTIMES_${target}-unknown-fuchsia+relative-vtables_CMAKE_CXX_FLAGS "${RUNTIMES_${target}-unknown-fuchsia+relative-vtables_CMAKE_CXX_FLAGS} -Xclang -fexperimental-relative-c++-abi-vtables" CACHE STRING "")
+
# Use .build-id link.
list(APPEND RUNTIME_BUILD_ID_LINK "${target}-unknown-fuchsia")
endforeach()
- set(LLVM_RUNTIME_MULTILIBS "asan;noexcept;asan+noexcept" CACHE STRING "")
+ set(LLVM_RUNTIME_MULTILIBS "asan;noexcept;asan+noexcept;relative-vtables" CACHE STRING "")
set(LLVM_RUNTIME_MULTILIB_asan_TARGETS "x86_64-unknown-fuchsia;aarch64-unknown-fuchsia" CACHE STRING "")
set(LLVM_RUNTIME_MULTILIB_noexcept_TARGETS "x86_64-unknown-fuchsia;aarch64-unknown-fuchsia" CACHE STRING "")
set(LLVM_RUNTIME_MULTILIB_asan+noexcept_TARGETS "x86_64-unknown-fuchsia;aarch64-unknown-fuchsia" CACHE STRING "")
+ set(LLVM_RUNTIME_MULTILIB_relative-vtables_TARGETS "x86_64-unknown-fuchsia;aarch64-unknown-fuchsia" CACHE STRING "")
endif()
set(LLVM_BUILTIN_TARGETS "${BUILTIN_TARGETS}" CACHE STRING "")
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