Date: Sat, 9 Jan 2016 00:42:07 +0000 (UTC) From: Ed Maste <emaste@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r293450 - in head: gnu/lib/libgcc share/mk tools/build/options Message-ID: <201601090042.u090g7dX048643@repo.freebsd.org>
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Author: emaste Date: Sat Jan 9 00:42:07 2016 New Revision: 293450 URL: https://svnweb.freebsd.org/changeset/base/293450 Log: Support use of LLVM's libunwind for exception unwinding It is built in libgcc_s.so and libgcc_eh.a to simplify transition. It is enabled by default on arm64 (where we previously had no other unwinder) and may be enabled for testing on other platforms by setting WITH_LLVM_LIBUNWIND in src.conf(5). Also add compiler-rt's __gcc_personality_v0 implementation for use with the LLVM unwinder. Relnotes: Yes Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D4787 Added: head/tools/build/options/WITHOUT_LLVM_LIBUNWIND (contents, props changed) head/tools/build/options/WITH_LLVM_LIBUNWIND (contents, props changed) Modified: head/gnu/lib/libgcc/Makefile head/share/mk/src.opts.mk Modified: head/gnu/lib/libgcc/Makefile ============================================================================== --- head/gnu/lib/libgcc/Makefile Sat Jan 9 00:34:48 2016 (r293449) +++ head/gnu/lib/libgcc/Makefile Sat Jan 9 00:42:07 2016 (r293450) @@ -2,6 +2,9 @@ GCCDIR= ${.CURDIR}/../../../contrib/gcc GCCLIB= ${.CURDIR}/../../../contrib/gcclibs +COMPILERRTDIR= ${.CURDIR}/../../../contrib/compiler-rt +UNWINDINCDIR= ${.CURDIR}/../../../contrib/llvm/projects/libunwind/include +UNWINDSRCDIR= ${.CURDIR}/../../../contrib/llvm/projects/libunwind/src SHLIB_NAME= libgcc_s.so.1 SHLIBDIR?= /lib @@ -67,8 +70,37 @@ LIB2ADD = $(LIB2FUNCS_EXTRA) LIB2ADD_ST = $(LIB2FUNCS_STATIC_EXTRA) # Additional sources to handle exceptions; overridden by targets as needed. +.if ${MK_LLVM_LIBUNWIND} != "no" + +.PATH: ${COMPILERRTDIR}/lib/builtins +.PATH: ${UNWINDSRCDIR} +LIB2ADDEH = gcc_personality_v0.c \ + int_util.c \ + Unwind-EHABI.cpp \ + Unwind-sjlj.c \ + UnwindLevel1-gcc-ext.c \ + UnwindLevel1.c \ + UnwindRegistersRestore.S \ + UnwindRegistersSave.S \ + libunwind.cpp + +CFLAGS+= -I${UNWINDINCDIR} -I${.CURDIR} +.if empty(CXXFLAGS:M-std=*) +CXXFLAGS+= -std=c++11 +.endif +CXXFLAGS+= -fno-rtti + +.else # MK_LLVM_LIBUNWIND + +.if ${TARGET_CPUARCH} == "arm" +LIB2ADDEH = unwind-arm.c libunwind.S pr-support.c unwind-c.c +.else LIB2ADDEH = unwind-dw2.c unwind-dw2-fde-glibc.c unwind-sjlj.c gthr-gnat.c \ unwind-c.c +.endif + +.endif # MK_LLVM_LIBUNWIND + LIB2ADDEHSTATIC = $(LIB2ADDEH) LIB2ADDEHSHARED = $(LIB2ADDEH) @@ -116,7 +148,6 @@ CFLAGS.clang+= -fheinous-gnu-extensions LIB1ASMSRC = lib1funcs.asm LIB1ASMFUNCS = _dvmd_tls _bb_init_func -LIB2ADDEH = unwind-arm.c libunwind.S pr-support.c unwind-c.c # Some compilers generate __aeabi_ functions libgcc_s is missing LIBADD+= compiler_rt .endif @@ -160,7 +191,10 @@ LIB2_DIVMOD_FUNCS:= ${LIB2_DIVMOD_FUNCS: .endfor .endif -COMMONHDRS= tm.h tconfig.h options.h unwind.h gthr-default.h +COMMONHDRS= tm.h tconfig.h options.h gthr-default.h +.if ${MK_LLVM_LIBUNWIND} == no +COMMONHDRS+= unwind.h +.endif #----------------------------------------------------------------------- # @@ -170,6 +204,9 @@ HIDE = -fvisibility=hidden -DHIDE_EXPOR CC_T = ${CC} -c ${CFLAGS} ${HIDE} -fPIC CC_P = ${CC} -c ${CFLAGS} ${HIDE} -p -fPIC CC_S = ${CC} -c ${CFLAGS} ${PICFLAG} -DSHARED +CXX_T = ${CXX} -c ${CXXFLAGS} ${HIDE} -fPIC +CXX_P = ${CXX} -c ${CXXFLAGS} ${HIDE} -p -fPIC +CXX_S = ${CXX} -c ${CXXFLAGS} ${PICFLAG} -DSHARED #----------------------------------------------------------------------- # @@ -284,16 +321,26 @@ EH_OBJS_S = ${LIB2ADDEHSHARED:R:S/$/.So/ EH_CFLAGS = -fexceptions -D__GLIBC__=3 -DElfW=__ElfN SOBJS += ${EH_OBJS_S} -.for _src in ${LIB2ADDEHSTATIC} +.for _src in ${LIB2ADDEHSTATIC:M*.c} ${_src:R:S/$/.o/}: ${_src} ${COMMONHDRS} ${CC_T} ${EH_CFLAGS} -o ${.TARGET} ${.IMPSRC} ${_src:R:S/$/.po/}: ${_src} ${COMMONHDRS} ${CC_P} ${EH_CFLAGS} -o ${.TARGET} ${.IMPSRC} .endfor -.for _src in ${LIB2ADDEHSHARED} +.for _src in ${LIB2ADDEHSTATIC:M*.cpp} +${_src:R:S/$/.o/}: ${_src} ${COMMONHDRS} + ${CXX_T} ${EH_CFLAGS} -o ${.TARGET} ${.IMPSRC} +${_src:R:S/$/.po/}: ${_src} ${COMMONHDRS} + ${CXX_P} ${EH_CFLAGS} -o ${.TARGET} ${.IMPSRC} +.endfor +.for _src in ${LIB2ADDEHSHARED:M*.c} ${_src:R:S/$/.So/}: ${_src} ${COMMONHDRS} ${CC_S} ${EH_CFLAGS} -o ${.TARGET} ${.IMPSRC} .endfor +.for _src in ${LIB2ADDEHSHARED:M*.cpp} +${_src:R:S/$/.So/}: ${_src} ${COMMONHDRS} + ${CXX_S} ${EH_CFLAGS} -o ${.TARGET} ${.IMPSRC} +.endfor #----------------------------------------------------------------------- Modified: head/share/mk/src.opts.mk ============================================================================== --- head/share/mk/src.opts.mk Sat Jan 9 00:34:48 2016 (r293449) +++ head/share/mk/src.opts.mk Sat Jan 9 00:42:07 2016 (r293450) @@ -231,9 +231,9 @@ __DEFAULT_NO_OPTIONS+=CLANG CLANG_BOOTST # In-tree binutils/gcc are older versions without modern architecture support. .if ${__T} == "aarch64" || ${__T} == "riscv64" BROKEN_OPTIONS+=BINUTILS BINUTILS_BOOTSTRAP GCC GCC_BOOTSTRAP GDB -__DEFAULT_YES_OPTIONS+=ELFCOPY_AS_OBJCOPY +__DEFAULT_YES_OPTIONS+=ELFCOPY_AS_OBJCOPY LLVM_LIBUNWIND .else -__DEFAULT_NO_OPTIONS+=ELFCOPY_AS_OBJCOPY +__DEFAULT_NO_OPTIONS+=ELFCOPY_AS_OBJCOPY LLVM_LIBUNWIND .endif .if ${__T} == "riscv64" BROKEN_OPTIONS+=PROFILE # "sorry, unimplemented: profiler support for RISC-V" Added: head/tools/build/options/WITHOUT_LLVM_LIBUNWIND ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/tools/build/options/WITHOUT_LLVM_LIBUNWIND Sat Jan 9 00:42:07 2016 (r293450) @@ -0,0 +1,2 @@ +.\" $FreeBSD$ +Set to use GCC's stack unwinder (instead of LLVM's libunwind). Added: head/tools/build/options/WITH_LLVM_LIBUNWIND ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/tools/build/options/WITH_LLVM_LIBUNWIND Sat Jan 9 00:42:07 2016 (r293450) @@ -0,0 +1,2 @@ +.\" $FreeBSD$ +Set to use LLVM's libunwind stack unwinder (instead of GCC's unwinder).
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