Date: Mon, 28 Dec 2020 17:02:20 -0800 From: bob prohaska <fbsd@www.zefox.net> To: Mark Millard <marklmi@yahoo.com> Cc: bob prohaska <fbsd@www.zefox.net>, freebsd-arm@freebsd.org Subject: Re: Migrating from -current to stable/12 on RPI2B (ARMv7) Message-ID: <20201229010220.GA36311@www.zefox.net> In-Reply-To: <CB0E5ECD-CDDA-46A7-812B-744AF7645A78@yahoo.com> References: <20201228044840.GA28380@www.zefox.net> <F9CB3890-5E07-46C9-AC40-D968F8B51B1F@yahoo.com> <20201228185622.GB28380@www.zefox.net> <E1EC1332-62D8-4E51-BF4D-9812AF7EF44B@yahoo.com> <2C1E2F87-2FC3-481C-A508-C76B2D7CFF7F@yahoo.com> <619A02CC-0EBA-4B50-A3BB-C326996AE706@yahoo.com> <B6A3C3C8-4AB9-43B5-A93F-8F2B6DE5E5E9@yahoo.com> <CB0E5ECD-CDDA-46A7-812B-744AF7645A78@yahoo.com>
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On Mon, Dec 28, 2020 at 04:14:51PM -0800, Mark Millard wrote: > [I get the problem as well! I report a backtrace of the failure > and some more.] > =20 Relieved to see it's reproducible. =20 Thanks for investigating! =20 bob prohaska > On 2020-Dec-28, at 14:04, Mark Millard <marklmi at yahoo.com> wrote: >=20 > > On 2020-Dec-28, at 13:19, Mark Millard <marklmi at yahoo.com> wrote: > >=20 > >> On 2020-Dec-28, at 12:55, Mark Millard <marklmi at yahoo.com> wrote: > >>>=20 > >>>=20 > >>> On 2020-Dec-28, at 12:07, Mark Millard <marklmi at yahoo.com> wrote: > >>>=20 > >>>=20 > >>>> On 2020-Dec-28, at 10:56, bob prohaska <fbsd at www.zefox.net> wrote: > >>>>=20 > >>>>> On Sun, Dec 27, 2020 at 10:10:18PM -0800, Mark Millard wrote: > >>>>>>=20 > >>>>>>=20 > >>>>>> On 2020-Dec-27, at 20:48, bob prohaska <fbsd@www.zefox.net> wrote: > >>>>>>=20 > >>>>>>> . . . > >>>>>>=20 > >>>>> I didn't know about LDFLAGS, but a re-try with=20 > >>>>> -j1 and LDFLAGS.lld+=3D -Wl,--threads=3D1 > >>>>> (apparently the syntax changed) in /etc/make.conf=20 > >>>>> promptly reproduced the error.=20 > >>>>=20 > >>>> Hmm. It been a while since I did a native build instead of a > >>>> cross build. The cross build context has RAM and does not > >>>> use the assignment so I'd not noticed. > >>>>=20 > >>>> Thanks for the report! > >>>=20 > >>> lld for LLVM 10 always had --no-threads as I now understand > >>> and stable/12 still has/uses/needs LLVM 10.0.1 (with > >>> updates). > >>>=20 > >>> That means that lld from LLVM 11 was in use (FreeBSD > >>> 13's system ld). The build was probably trying to build > >>> some LLVM 10.0.1 final+ materials for bootstrap style > >>> build use in later build stages (older FreeBSD targeting). > >>> It likely had not gotten to the stage of building freebsd > >>> stable/12 material itself. > >>>=20 > >>> Attempting to build devel/llvm10 might well have the same > >>> issue without having to involve an extra FreeBSD source > >>> tree or build. > >>=20 > >> There is another gotcha-issue with the change from --no-threads > >> to --threads=3D1 based on neither working for both 10.0.x and > >> 11.0.y: which ever one is listed in /etc/make.conf (say) will be > >> wrong for other one of: > >>=20 > >> A) building the bootstrap toolchain > >> B) using the bootstrap toolchain > >>=20 > >> The LDFLAGS.lld definition would need to be conditional on the > >> distinction in order to be correct inside each type of context. > >=20 > > I've started an experiment going another direction: an armv7 > > context with lots of RAM (and faster processing) with a > > 13 attempting to build a stable/12 . It is via a chroot into > > an armv7 13 world on a 8 GiByte, 4-core Cortex-A57 based > > OverDrive 1000 running aarch64 13. Each process should still > > be limited to what 32-bit systems allow but overall the > > system is not that limited. I used -j4 . > >=20 > > If such still got the error, then there would likely be > > implications about the error and it would be unlikely > > that it would work on the RPi2 v1.1 . (But I expect that > > it will not get the error.) > >=20 > > Root owns file system involved and is doing the build. > >=20 > > It did report: > >=20 > > make[1]: "/usr/fbsd/stable-12-src/Makefile.inc1" line 344: SYSTEM_COMPI= LER: libclang will be built for bootstrapping a cross-compiler. > > make[1]: "/usr/fbsd/stable-12-src/Makefile.inc1" line 349: SYSTEM_LINKE= R: libclang will be built for bootstrapping a cross-linker. > >=20 > > I already had a stable-12-src branch from git experiments > > but the matching worktree was missing despite being still > > registered. So the worktree recreation was: > >=20 > > # git worktree add -f ../stable-12-src stable-12-src > > Preparing worktree (checking out 'stable-12-src') > > Updating files: 100% (81363/81363), done. > > HEAD is now at f4d0bc6aa6b9 MFC r354991-r354992 (by lwhsu) >=20 > For armv7 13's context being based on: >=20 > WITH_ASSERT_DEBUG=3D > WITH_LLVM_ASSERTIONS=3D > WITHOUT_MALLOC_PRODUCTION=3D > WITH_DEBUG_FILES=3D > -mcpu=3Dcortex-a7 > -g in use despite -O2 or such optimizations. >=20 > (The WITHOUT_MALLOC_PRODUCTION is because of a typo > in the attempt to have set WITH_MALLOC_PRODUCTION.) >=20 > I was not using --threads=3D1 since it would fail for later > build stages. >=20 > The being-built context was based on: >=20 > WITH_ASSERT_DEBUG=3D > WITHOUT_LLVM_ASSERTIONS=3D > WITH_MALLOC_PRODUCTION=3D > WITH_DEBUG_FILES=3D > -mcpu=3Dcortex-a7 > -g in use despite -O2 or such optimizations. >=20 > I got what follows. (But note that the ARM64TODO: fill_fpregs32c++ > is likely from the handling of the process crash already in > process and is not contributing to the problem starting.) >=20 > . . . > --- all_subdir_usr.bin/clang/clang --- > [Creating objdir /usr/obj/rpi2_clang/arm.armv7/usr/fbsd/stable-12-src/arm= =2Earmv7/tmp/obj-tools/usr.bin/clang/clang...] > Building /usr/obj/rpi2_clang/arm.armv7/usr/fbsd/stable-12-src/arm.armv7/t= mp/obj-tools/usr.bin/clang/clang/cc1_main.o > Building /usr/obj/rpi2_clang/arm.armv7/usr/fbsd/stable-12-src/arm.armv7/t= mp/obj-tools/usr.bin/clang/clang/cc1as_main.o > Building /usr/obj/rpi2_clang/arm.armv7/usr/fbsd/stable-12-src/arm.armv7/t= mp/obj-tools/usr.bin/clang/clang/cc1gen_reproducer_main.o > Building /usr/obj/rpi2_clang/arm.armv7/usr/fbsd/stable-12-src/arm.armv7/t= mp/obj-tools/usr.bin/clang/clang/driver.o > Building /usr/obj/rpi2_clang/arm.armv7/usr/fbsd/stable-12-src/arm.armv7/t= mp/obj-tools/usr.bin/clang/clang/clang.full > --- clang.full --- > LLVM ERROR: out of memory > PLEASE submit a bug report to https://bugs.freebsd.org/submit/ and includ= e the crash backtrace. > Stack dump: > 0. Program arguments: /usr/bin/ld --eh-frame-hdr -Bstatic -o clang.f= ull /usr/lib/crt1.o /usr/lib/crti.o /usr/lib/crtbeginT.o -L/usr/obj/rpi2_cl= ang/arm.armv7/usr/fbsd/stable-12-src/arm.armv7/tmp/legacy/usr/lib -L/usr/ob= j/rpi2_clang/arm.armv7/usr/fbsd/stable-12-src/arm.armv7/tmp/obj-tools/lib/l= ibz -L/usr/obj/rpi2_clang/arm.armv7/usr/fbsd/stable-12-src/arm.armv7/tmp/ob= j-tools/lib/libexecinfo -L/usr/obj/rpi2_clang/arm.armv7/usr/fbsd/stable-12-= src/arm.armv7/tmp/obj-tools/lib/libelf -L/usr/obj/rpi2_clang/arm.armv7/usr/= fbsd/stable-12-src/arm.armv7/tmp/obj-tools/lib/ncurses/ncursesw -L/usr/obj/= rpi2_clang/arm.armv7/usr/fbsd/stable-12-src/arm.armv7/tmp/obj-tools/lib/lib= thr -L/usr/lib --gc-sections cc1_main.o cc1as_main.o cc1gen_reproducer_main= =2Eo driver.o /usr/obj/rpi2_clang/arm.armv7/usr/fbsd/stable-12-src/arm.armv= 7/tmp/obj-tools/lib/clang/libclang/libclang.a /usr/obj/rpi2_clang/arm.armv7= /usr/fbsd/stable-12-src/arm.armv7/tmp/obj-tools/lib/clang/libllvm/libllvm.a= -lz -lexecinfo -lelf -lncursesw -lpthread -legacy -lc++ -lm -lgcc -lgcc_eh= -lc -lgcc -lgcc_eh /usr/lib/crtend.o /usr/lib/crtn.o=20 > #0 0x00de160c llvm::sys::PrintStackTrace(llvm::raw_ostream&) /usr/src/con= trib/llvm-project/llvm/lib/Support/Unix/Signals.inc:572:7 > #1 0x00ddf604 llvm::sys::RunSignalHandlers() /usr/src/contrib/llvm-projec= t/llvm/lib/Support/Signals.cpp:0:5 > #2 0x00de1f3c SignalHandler(int) /usr/src/contrib/llvm-project/llvm/lib/S= upport/Unix/Signals.inc:406:1 > #3 0x42021db4 handle_signal /usr/src/lib/libthr/thread/thr_sig.c:0:3 > ARM64TODO: fill_fpregs32c++: error: unable to execute command: Abort trap= (core dumped) > c++: error: linker command failed due to signal (use -v to see invocation) > *** [clang.full] Error code 254 >=20 > make[4]: stopped in /usr/fbsd/stable-12-src/usr.bin/clang/clang > .ERROR_TARGET=3D'clang.full' > .ERROR_META_FILE=3D'/usr/obj/rpi2_clang/arm.armv7/usr/fbsd/stable-12-src/= arm.armv7/tmp/obj-tools/usr.bin/clang/clang/clang.full.meta' > .MAKE.LEVEL=3D'4' > MAKEFILE=3D'' > .MAKE.MODE=3D'meta missing-filemon=3Dyes missing-meta=3Dyes silent=3Dyes = verbose' > _ERROR_CMD=3D'c++ -O -pipe -fno-common -mlong-calls -I/usr/obj/rpi2_clang= /arm.armv7/usr/fbsd/stable-12-src/arm.armv7/tmp/obj-tools/lib/clang/libclan= g -I/usr/obj/rpi2_clang/arm.armv7/usr/fbsd/stable-12-src/arm.armv7/tmp/obj-= tools/lib/clang/libllvm -I/usr/fbsd/stable-12-src/contrib/llvm-project/clan= g/include -I/usr/fbsd/stable-12-src/lib/clang/include -I/usr/fbsd/stable-12= -src/contrib/llvm-project/llvm/include -D__STDC_CONSTANT_MACROS -D__STDC_FO= RMAT_MACROS -D__STDC_LIMIT_MACROS -DHAVE_VCS_VERSION_INC -DNDEBUG -DLLVM_DE= FAULT_TARGET_TRIPLE=3D\"armv7-unknown-freebsd12.2-gnueabihf\" -DLLVM_HOST_T= RIPLE=3D\"armv7-unknown-freebsd12.2\" -DDEFAULT_SYSROOT=3D\"/usr/obj/rpi2_c= lang/arm.armv7/usr/fbsd/stable-12-src/arm.armv7/tmp\" -DLLVM_TARGET_ENABLE_= ARM -DLLVM_NATIVE_ASMPARSER=3DLLVMInitializeARMAsmParser -DLLVM_NATIVE_ASMP= RINTER=3DLLVMInitializeARMAsmPrinter -DLLVM_NATIVE_DISASSEMBLER=3DLLVMIniti= alizeARMDisassembler -DLLVM_NATIVE_TARGET=3DLLVMInitializeARMTarget -DLLVM_= NATIVE_TARGETINFO=3DLLVMInitializeARMTargetInfo -DLLVM_NATIVE_TARGETMC=3DLL= VMInitializeARMTargetMC -ffunction-sections -fdata-sections -gline-tables-o= nly -Wno-format-zero-length -mcpu=3Dcortex-a7 -Qunused-arguments -I/usr/obj= /rpi2_clang/arm.armv7/usr/fbsd/stable-12-src/arm.armv7/tmp/legacy/usr/inclu= de -fno-exceptions -fno-rtti -std=3Dc++14 -mcpu=3Dcortex-a7 -stdlib=3Dlibc+= + -Wno-c++11-extensions -Wl,--gc-sections -static -L/usr/obj/rpi2_clang/a= rm.armv7/usr/fbsd/stable-12-src/arm.armv7/tmp/legacy/usr/lib -o clang.full = cc1_main.o cc1as_main.o cc1gen_reproducer_main.o driver.o /usr/obj/rpi2_cl= ang/arm.armv7/usr/fbsd/stable-12-src/arm.armv7/tmp/obj-tools/lib/clang/libc= lang/libclang.a /usr/obj/rpi2_clang/arm.armv7/usr/fbsd/stable-12-src/arm.ar= mv7/tmp/obj-tools/lib/clang/libllvm/libllvm.a -L/usr/obj/rpi2_clang/arm.arm= v7/usr/fbsd/stable-12-src/arm.armv7/tmp/obj-tools/lib/libz -lz -L/usr/obj/r= pi2_clang/arm.armv7/usr/fbsd/stable-12-src/arm.armv7/tmp/obj-tools/lib/libe= xecinfo -lexecinfo -L/usr/obj/rpi2_clang/arm.armv7/usr/fbsd/stable-12-src/a= rm.armv7/tmp/obj-tools/lib/libelf -lelf -L/usr/obj/rpi2_clang/arm.armv7/usr= /fbsd/stable-12-src/arm.armv7/tmp/obj-tools/lib/ncurses/ncursesw -lncursesw= -L/usr/obj/rpi2_clang/arm.armv7/usr/fbsd/stable-12-src/arm.armv7/tmp/obj-t= ools/lib/libthr -lpthread -legacy;' > .CURDIR=3D'/usr/fbsd/stable-12-src/usr.bin/clang/clang' > .MAKE=3D'make' > .OBJDIR=3D'/usr/obj/rpi2_clang/arm.armv7/usr/fbsd/stable-12-src/arm.armv7= /tmp/obj-tools/usr.bin/clang/clang' > .TARGETS=3D'all' > DESTDIR=3D'' > LD_LIBRARY_PATH=3D'' > MACHINE=3D'arm' > MACHINE_ARCH=3D'armv7' > MAKEOBJDIRPREFIX=3D'' > MAKESYSPATH=3D'/usr/fbsd/stable-12-src/share/mk' > MAKE_VERSION=3D'20201117' > PATH=3D'/usr/obj/rpi2_clang/arm.armv7/usr/fbsd/stable-12-src/arm.armv7/tm= p/legacy/usr/sbin:/usr/obj/rpi2_clang/arm.armv7/usr/fbsd/stable-12-src/arm.= armv7/tmp/legacy/usr/bin:/usr/obj/rpi2_clang/arm.armv7/usr/fbsd/stable-12-s= rc/arm.armv7/tmp/legacy/bin:/sbin:/bin:/usr/sbin:/usr/bin' > SRCTOP=3D'/usr/fbsd/stable-12-src' > OBJTOP=3D'/usr/obj/rpi2_clang/arm.armv7/usr/fbsd/stable-12-src/arm.armv7/= tmp/obj-tools' > .MAKE.MAKEFILES=3D'/usr/fbsd/stable-12-src/share/mk/sys.mk /usr/fbsd/stab= le-12-src/share/mk/local.sys.env.mk /usr/fbsd/stable-12-src/share/mk/src.sy= s.env.mk /root/src.configs/src.conf.armv7-clang-bootstrap.armv7-host /usr/f= bsd/stable-12-src/share/mk/bsd.mkopt.mk /usr/fbsd/stable-12-src/share/mk/sr= c.sys.obj.mk /usr/fbsd/stable-12-src/share/mk/auto.obj.mk /usr/fbsd/stable-= 12-src/share/mk/bsd.suffixes.mk /root/src.configs/make.conf /usr/fbsd/stabl= e-12-src/share/mk/local.sys.mk /usr/fbsd/stable-12-src/share/mk/src.sys.mk = /dev/null /usr/fbsd/stable-12-src/usr.bin/clang/clang/Makefile /usr/fbsd/st= able-12-src/share/mk/src.opts.mk /usr/fbsd/stable-12-src/share/mk/bsd.own.m= k /usr/fbsd/stable-12-src/share/mk/bsd.opts.mk /usr/fbsd/stable-12-src/shar= e/mk/bsd.cpu.mk /usr/fbsd/stable-12-src/share/mk/bsd.compiler.mk /usr/fbsd/= stable-12-src/share/mk/bsd.linker.mk /usr/fbsd/stable-12-src/usr.bin/clang/= clang.prog.mk /usr/fbsd/stable-12-src/lib/clang/clang.pre.mk /usr/fbsd/stab= le-12-src/lib/clang/llvm.pre.mk /usr/fbsd/stable-12-src/lib/clang/clang.bui= ld.mk /usr/fbsd/stable-12-src/lib/clang/llvm.build.mk /usr/fbsd/stable-12-s= rc/tools/build/mk/bsd.prog.mk /usr/fbsd/stable-12-src/share/mk/bsd.prog.mk = /usr/fbsd/stable-12-src/share/mk/bsd.init.mk /usr/fbsd/stable-12-src/share/= mk/local.init.mk /usr/fbsd/stable-12-src/share/mk/src.init.mk /usr/fbsd/sta= ble-12-src/usr.bin/clang/clang/../Makefile.inc /usr/fbsd/stable-12-src/usr.= bin/clang/clang/../../Makefile.inc /usr/fbsd/stable-12-src/share/mk/bsd.lib= names.mk /usr/fbsd/stable-12-src/share/mk/src.libnames.mk /usr/fbsd/stable-= 12-src/share/mk/bsd.nls.mk /usr/fbsd/stable-12-src/share/mk/bsd.confs.mk /u= sr/fbsd/stable-12-src/share/mk/bsd.files.mk /usr/fbsd/stable-12-src/share/m= k/bsd.dirs.mk /usr/fbsd/stable-12-src/share/mk/bsd.incs.mk /usr/fbsd/stable= -12-src/share/mk/bsd.links.mk /usr/fbsd/stable-12-src/share/mk/bsd.dep.mk /= usr/fbsd/stable-12-src/share/mk/bsd.clang-analyze.mk /usr/fbsd/stable-12-sr= c/share/mk/bsd.obj.mk /usr/fbsd/stable-12-src/share/mk/bsd.subdir.mk /usr/f= bsd/stable-12-src/share/mk/bsd.sys.mk /usr/fbsd/stable-12-src/tools/build/m= k/Makefile.boot' > .PATH=3D'. /usr/fbsd/stable-12-src/usr.bin/clang/clang /usr/fbsd/stable-1= 2-src/contrib/llvm-project/clang/tools/driver' > 1 error >=20 > # gdb /usr/bin/ld.lld /usr/obj/rpi2_clang/arm.armv7/usr/fbsd/stable-12-sr= c/arm.armv7/tmp/obj-tools/usr.bin/clang/clang/ld.lld.core > GNU gdb (GDB) 10.1 [GDB v10.1 for FreeBSD] > Copyright (C) 2020 Free Software Foundation, Inc. > License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.h= tml> > . . . > Reading symbols from /usr/bin/ld.lld... > Reading symbols from /usr/lib/debug//usr/bin/ld.lld.debug... > [New LWP 100183] > Core was generated by `/usr/bin/ld --eh-frame-hdr -Bstatic -o clang.full = /usr/lib/crt1.o /usr/lib/crti.'. > Program terminated with signal SIGABRT, Aborted. > #0 thr_kill () at thr_kill.S:4 > 4 thr_kill.S: No such file or directory. > (gdb) info threads > Id Target Id Frame=20 > * 1 LWP 100183 thr_kill () at thr_kill.S:4(gdb) info threads > Id Target Id Frame=20 > * 1 LWP 100183 thr_kill () at thr_kill.S:4 > (gdb) bt > #0 thr_kill () at thr_kill.S:4 > #1 0x4227d998 in __raise (s=3D6) at /usr/src/lib/libc/gen/raise.c:52 > #2 0x423322c8 in abort () at /usr/src/lib/libc/stdlib/abort.c:79 > #3 0x00da5e4c in report_bad_alloc_error () at /usr/src/contrib/llvm-proj= ect/llvm/lib/Support/ErrorHandling.cpp:174 > #4 0x00da61c8 in out_of_memory_new_handler() () at /usr/src/contrib/llvm= -project/llvm/lib/Support/ErrorHandling.cpp:187 > #5 0x420f5d24 in operator new (size=3D<optimized out>) at /usr/src/contr= ib/llvm-project/libcxx/src/new.cpp:73 > #6 0x004d995c in Allocate () at /usr/src/contrib/llvm-project/llvm/inclu= de/llvm/Support/AllocatorBase.h:85 > #7 StartNewSlab () at /usr/src/contrib/llvm-project/llvm/include/llvm/Su= pport/Allocator.h:336 > #8 Allocate () at /usr/src/contrib/llvm-project/llvm/include/llvm/Suppor= t/Allocator.h:188 > #9 0x00543388 in Allocate () at /usr/src/contrib/llvm-project/llvm/inclu= de/llvm/Support/Allocator.h:202 > #10 Allocate () at /usr/src/contrib/llvm-project/llvm/include/llvm/Suppor= t/AllocatorBase.h:46 > #11 Allocate<lld::elf::Defined> () at /usr/src/contrib/llvm-project/llvm/= include/llvm/Support/AllocatorBase.h:69 > #12 Allocate () at /usr/src/contrib/llvm-project/llvm/include/llvm/Suppor= t/Allocator.h:427 > #13 make<lld::elf::Defined, lld::elf::ObjFile<llvm::object::ELF32LE> *, l= ld::elf::StringRefZ &, llvm::ELF::(anonymous enum at /usr/src/contrib/llvm-= project/llvm/include/llvm/BinaryFormat/ELF.h:1044:1), const unsigned char &= , unsigned char &, const llvm::support::detail::packed_endian_specific_inte= gral<unsigned int, llvm::support::little, 1, 1> &, const llvm::support::det= ail::packed_endian_specific_integral<unsigned int, llvm::support::little, 1= , 1> &, lld::elf::InputSectionBase *&> () at /usr/src/contrib/llvm-project/= lld/include/lld/Common/Memory.h:62 > #14 initializeSymbols () at /usr/src/contrib/llvm-project/lld/ELF/InputFi= les.cpp:1107 > #15 0x0053a008 in parse () at /usr/src/contrib/llvm-project/lld/ELF/Input= Files.cpp:401 > #16 doParseFile<llvm::object::ELFType<llvm::support::little, false> > () = at /usr/src/contrib/llvm-project/lld/ELF/InputFiles.cpp:208 > #17 parseFile () at /usr/src/contrib/llvm-project/lld/ELF/InputFiles.cpp:= 215 > #18 0x0053b684 in fetch () at /usr/src/contrib/llvm-project/lld/ELF/Input= Files.cpp:1212 > #19 0x005fdce8 in addSymbol () at /usr/src/contrib/llvm-project/lld/ELF/S= ymbolTable.cpp:98 > #20 0x0053b4b4 in parse () at /usr/src/contrib/llvm-project/lld/ELF/Input= Files.cpp:1184 > #21 0x005143bc in link<llvm::object::ELFType<llvm::support::little, false= > > () at /usr/src/contrib/llvm-project/lld/ELF/Driver.cpp:1916 > #22 0x0050c864 in main () at /usr/src/contrib/llvm-project/lld/ELF/Driver= =2Ecpp:539 > #23 0x0050b078 in link () at /usr/src/contrib/llvm-project/lld/ELF/Driver= =2Ecpp:114 > #24 0x006be290 in main () at /usr/src/contrib/llvm-project/lld/tools/lld/= lld.cpp:146 >=20 > The size of the slab being allocated and the allocation initiation > are from #7 above: >=20 > /// Allocate a new slab and move the bump pointers over into the new > /// slab, modifying CurPtr and End. > void StartNewSlab() { > size_t AllocatedSlabSize =3D computeSlabSize(Slabs.size()); >=20 > void *NewSlab =3D > Allocator.Allocate(AllocatedSlabSize, alignof(std::max_align_t)); > . . . >=20 > This code is associated with the class template: >=20 > /// Allocate memory in an ever growing pool, as if by bump-pointer. > /// =20 > /// This isn't strictly a bump-pointer allocator as it uses backing slabs= of > /// memory rather than relying on a boundless contiguous heap. However, i= t has > /// bump-pointer semantics in that it is a monotonically growing pool of = memory > /// where every allocation is found by merely allocating the next N bytes= in > /// the slab, or the next N bytes in the next slab. > /// > /// Note that this also has a threshold for forcing allocations above a c= ertain > /// size into their own slab. > /// > /// The BumpPtrAllocatorImpl template defaults to using a MallocAllocator > /// object, which wraps malloc, to allocate memory, but it can be changed= to > /// use a custom allocator. > /// > /// The GrowthDelay specifies after how many allocated slabs the allocator > /// increases the size of the slabs. > template <typename AllocatorT =3D MallocAllocator, size_t SlabSize =3D 40= 96, > size_t SizeThreshold =3D SlabSize, size_t GrowthDelay =3D 128> > class BumpPtrAllocatorImpl > : public AllocatorBase<BumpPtrAllocatorImpl<AllocatorT, SlabSize, > SizeThreshold, GrowthDela= y>> { > . . . >=20 > The actual malloc call and the later out_of_memory_new_handler > call was via #5: >=20 > // Implement all new and delete operators as weak definitions > // in this shared library, so that they can be overridden by programs > // that define non-weak copies of the functions. >=20 > _LIBCPP_WEAK > void * > operator new(std::size_t size) _THROW_BAD_ALLOC > { > if (size =3D=3D 0) > size =3D 1; > void* p; > while ((p =3D ::malloc(size)) =3D=3D 0) > { > // If malloc fails and there is a new_handler, > // call it to try free up memory. > std::new_handler nh =3D std::get_new_handler(); > if (nh) > nh(); > . . . >=20 > malloc really did return NULL. >=20 > It looks like the allocations simply got to be to > big in total in process virtual memory space, not > necessarily in (contiguous) RAM space. >=20 >=20 > =3D=3D=3D > Mark Millard > marklmi at yahoo.com > ( dsl-only.net went > away in early 2018-Mar) >=20 >=20
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