Date: Sat, 25 Dec 2021 11:55:09 GMT From: Dimitry Andric <dim@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: f4abc3ea2749 - stable/12 - Allow using sanitizers for ssp tests with out-of-tree compiler Message-ID: <202112251155.1BPBt9F1006112@gitrepo.freebsd.org>
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The branch stable/12 has been updated by dim: URL: https://cgit.FreeBSD.org/src/commit/?id=f4abc3ea2749653f1c6db9c6996ee140db1d1d66 commit f4abc3ea2749653f1c6db9c6996ee140db1d1d66 Author: Alex Richardson <arichardson@FreeBSD.org> AuthorDate: 2021-03-12 17:15:00 +0000 Commit: Dimitry Andric <dim@FreeBSD.org> CommitDate: 2021-12-25 11:50:59 +0000 Allow using sanitizers for ssp tests with out-of-tree compiler With an out-of-tree Clang, we can use the -resource-dir flag when linking to point it at the runtime libraries from the current SYSROOT. This moves the path to the clang-internal library directory to a separate .mk file that can be used by Makefiles that want to find the sanitizer libraries. I intend to re-use this .mk file for my upcoming changes that allow building the entire base system with ASAN/UBSAN/MSAN. Reviewed By: dim Differential Revision: https://reviews.freebsd.org/D28852 (cherry picked from commit fe525d3f916602ddac3286641dab8f5e274daa44) --- lib/libc/tests/ssp/Makefile | 27 ++++++++++++--------------- lib/libclang_rt/Makefile.inc | 12 ++---------- lib/libclang_rt/compiler-rt-vars.mk | 24 ++++++++++++++++++++++++ 3 files changed, 38 insertions(+), 25 deletions(-) diff --git a/lib/libc/tests/ssp/Makefile b/lib/libc/tests/ssp/Makefile index c6b625a91d7b..5194a46f9355 100644 --- a/lib/libc/tests/ssp/Makefile +++ b/lib/libc/tests/ssp/Makefile @@ -6,9 +6,10 @@ NO_WERROR= WARNS?= 2 CFLAGS.h_raw+= -fstack-protector-all -Wstack-protector -.if ${COMPILER_TYPE} == "clang" && ${CC} == "cc" -# Only use -fsanitize=bounds when using the in-tree compiler. Otherwise -# we may link to a sanitizer library targeted at a newer kernel/libc. +.if ${COMPILER_TYPE} == "clang" +# Only use -fsanitize=bounds when using clang. Otherwise we are not able to +# override the sanitizer runtime libraries to be the ones installed on the +# target system. CFLAGS.h_raw+= -fsanitize=bounds .elif ${COMPILER_TYPE} == "gcc" CFLAGS.h_raw+= --param ssp-buffer-size=1 @@ -25,24 +26,20 @@ PROGS+= h_getcwd PROGS+= h_memcpy PROGS+= h_memmove PROGS+= h_memset -# This testcase doesn't run properly when not compiled with -fsantize=bounds -# with clang, which is currently contingent on a compiler_rt update -# # XXX: the h_raw/h_read testcases don't cause a SIGABRT with in-tree gcc right # now on amd64 when it trips the stack bounds specified in t_ssp.sh . This # probably needs to be fixed as it's currently hardcoded. -# -# sanitizer is not tested or supported for ARM right now. sbruno -.if ${COMPILER_TYPE} == "clang" && ${CC} == "cc" && !defined(_SKIP_BUILD) && \ +.if ${COMPILER_TYPE} == "clang" && !defined(_SKIP_BUILD) && \ (!defined(_RECURSING_PROGS) || ${PROG} == "h_raw") -.if !defined(_CLANG_RESOURCE_DIR) -_CLANG_RESOURCE_DIR!= ${CC:N${CCACHE_BIN}} -print-resource-dir -.export _CLANG_RESOURCE_DIR -.endif -_libclang_rt_arch= ${MACHINE_ARCH:S/amd64/x86_64/:C/hf$//:S/mipsn32/mips64/} -_libclang_rt_ubsan= ${_CLANG_RESOURCE_DIR}/lib/freebsd/libclang_rt.ubsan_standalone-${_libclang_rt_arch}.a +.include "${SRCTOP}/lib/libclang_rt/compiler-rt-vars.mk" +_libclang_rt_ubsan= ${SYSROOT}${SANITIZER_LIBDIR}/libclang_rt.ubsan_standalone-${CRTARCH}.a .if exists(${_libclang_rt_ubsan}) PROGS+= h_raw +LDADD.h_raw+= ${SANITIZER_LDFLAGS} +.else +.if make(all) +.info "Could not find runtime library ${_libclang_rt_ubsan}, skipping h_raw" +.endif .endif .endif PROGS+= h_read diff --git a/lib/libclang_rt/Makefile.inc b/lib/libclang_rt/Makefile.inc index 09f024be26dc..2b15f1122c5f 100644 --- a/lib/libclang_rt/Makefile.inc +++ b/lib/libclang_rt/Makefile.inc @@ -2,20 +2,12 @@ .include <bsd.compiler.mk> -# armv[67] is a bit special since we allow a soft-floating version via -# CPUTYPE matching *soft*. This variant may not actually work though. -.if ${MACHINE_ARCH:Marmv[67]*} != "" && \ - (!defined(CPUTYPE) || ${CPUTYPE:M*soft*} == "") -CRTARCH?= armhf -.else -CRTARCH?= ${MACHINE_ARCH:C/amd64/x86_64/} -.endif CRTSRC= ${SRCTOP}/contrib/llvm-project/compiler-rt +.include "compiler-rt-vars.mk" .PATH: ${CRTSRC}/lib -CLANGDIR= /usr/lib/clang/11.0.1 -LIBDIR= ${CLANGDIR}/lib/freebsd +LIBDIR= ${SANITIZER_LIBDIR} SHLIBDIR= ${LIBDIR} NO_PIC= diff --git a/lib/libclang_rt/compiler-rt-vars.mk b/lib/libclang_rt/compiler-rt-vars.mk new file mode 100644 index 000000000000..17424785c372 --- /dev/null +++ b/lib/libclang_rt/compiler-rt-vars.mk @@ -0,0 +1,24 @@ +CLANG_SUBDIR=clang/11.0.1 +CLANGDIR= /usr/lib/${CLANG_SUBDIR} +SANITIZER_LIBDIR= ${CLANGDIR}/lib/freebsd + +# armv[67] is a bit special since we allow a soft-floating version via +# CPUTYPE matching *soft*. This variant may not actually work though. +.if ${MACHINE_ARCH:Marmv[67]*} != "" && \ + (!defined(CPUTYPE) || ${CPUTYPE:M*soft*} == "") +CRTARCH?= armhf +.else +CRTARCH?= ${MACHINE_ARCH:S/amd64/x86_64/:C/hf$//:S/mipsn32/mips64/} +.endif + +.if ${COMPILER_TYPE} == "clang" +# The only way to set the path to the sanitizer libraries with clang is to +# override the resource directory. +# Note: lib/freebsd is automatically appended to the -resource-dir value. +SANITIZER_LDFLAGS= -resource-dir=${SYSROOT}${CLANGDIR} +# Also set RPATH to ensure that the dynamically linked runtime libs are found. +SANITIZER_LDFLAGS+= -Wl,--enable-new-dtags +SANITIZER_LDFLAGS+= -Wl,-rpath,${SANITIZER_LIBDIR} +.else +.error "Unknown link flags for -fsanitize=... COMPILER_TYPE=${COMPILER_TYPE}" +.endif
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