Martin Jansa 33c96b7ed8 nodejs: use PIE for host binaries
* mksnapshot is built as host binary, but then gets executed under
  qemu-arm, because for 32bit target we need to run 32bit mksnapshot
  even when building on x86-64 host

* unfortunately since upgrade to qemu-8 in:
  https://git.openembedded.org/openembedded-core/commit/?id=fe8125565af07b73f9b29db2188ecb6e884bcc70

  the mksnapshot fails to execute with:
  LD_LIBRARY_PATH=/OE/build/oe-core/tmp-glibc/work/cortexa8t2hf-neon-oe-linux-gnueabi/nodejs/18.16.0-r0/node-v18.16.0/out/Release/lib.host:/OE/build/oe-core/tmp-glibc/work/cortexa8t2hf-neon-oe-linux-gnueabi/nodejs/18.16.0-r0/node-v18.16.0/out/Release/lib.target:$LD_LIBRARY_PATH; export LD_LIBRARY_PATH; cd ../tools/v8_gypfiles; mkdir -p /OE/build/oe-core/tmp-glibc/work/cortexa8t2hf-neon-oe-linux-gnueabi/nodejs/18.16.0-r0/node-v18.16.0/out/Release/obj.target/v8_snapshot/geni; "/OE/build/oe-core/tmp-glibc/work/cortexa8t2hf-neon-oe-linux-gnueabi/nodejs/18.16.0-r0/node-v18.16.0/out/Release/v8-qemu-wrapper.sh" "/OE/build/oe-core/tmp-glibc/work/cortexa8t2hf-neon-oe-linux-gnueabi/nodejs/18.16.0-r0/node-v18.16.0/out/Release/mksnapshot" --turbo_instruction_scheduling "--target_os=linux" "--target_arch=arm" --startup_src "/OE/build/oe-core/tmp-glibc/work/cortexa8t2hf-neon-oe-linux-gnueabi/nodejs/18.16.0-r0/node-v18.16.0/out/Release/obj.target/v8_snapshot/geni/snapshot.cc" --embedded_variant Default --embedded_src "/OE/build/oe-core/tmp-glibc/work/cortexa8t2hf-neon-oe-linux-gnueabi/nodejs/18.16.0-r0/node-v18.16.0/out/Release/obj.target/v8_snapshot/geni/embedded.S" --no-native-code-counters

  #
  # Fatal process OOM in Failed to reserve virtual memory for CodeRange
  #

  /OE/build/oe-core/tmp-glibc/work/cortexa8t2hf-neon-oe-linux-gnueabi/nodejs/18.16.0-r0/node-v18.16.0/out/Release/v8-qemu-wrapper.sh: line 7: 669880 Trace/breakpoint trap   (core dumped) PSEUDO_UNLOAD=1 qemu-arm -r 5.15 -L /OE/build/oe-core/tmp-glibc/work/cortexa8t2hf-neon-oe-linux-gnueabi/nodejs/18.16.0-r0/recipe-sysroot -E LD_LIBRARY_PATH=/OE/build/oe-core/tmp-glibc/work/cortexa8t2hf-neon-oe-linux-gnueabi/nodejs/18.16.0-r0/recipe-sysroot/usr/lib:/OE/build/oe-core/tmp-glibc/work/cortexa8t2hf-neon-oe-linux-gnueabi/nodejs/18.16.0-r0/recipe-sysroot/lib "$@"

  It was failing only in some of my builds first, in the end
  I was able to narrow the difference between the build where
  it fails and where it doesn't fail to
  require conf/distro/include/security_flags.inc
  then
  GCCPIE = "--enable-default-pie"
  and lastly this PIE enabled just for nodejs to work around
  this issue without downgrading qemu-native.

* using -strace with qemu doesn't help much, just confirms that
  the OOM error message is really caused by failed mmap2:

  --- SIGPROF {si_signo=SIGPROF, si_code=SI_TKILL, si_pid=2908258, si_uid=1026} ---
  clock_gettime64(CLOCK_MONOTONIC,0x407ef640) = 0 ({tv_sec=20187,tv_nsec=678404286})
  rt_sigreturn(0x407efb70) = -1 errno=513 (Successful exit from sigreturn)
  write(3,0x141e538,28) = 28
  write(3,0x141e538,28) = 28
  write(3,0x141e538,32) = 32
  mmap2(0x0097a000,33554432,PROT_NONE,MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE,-1,0) = -1 errno=12 (Cannot allocate memory)
  mmap2(0x0097a000,33554432,PROT_NONE,MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE,-1,0) = -1 errno=12 (Cannot allocate memory)

* diffoscope on this 1.7G binary didn't really help as it got killed by OOMK after a while
  Out of memory: Killed process 1136999 (diffoscope) total-vm:404300108kB, anon-rss:122594688kB, file-rss:512kB, shmem-rss:0kB, UID:1026 pgtables:764240kB oom_score_adj:0

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
2023-06-28 13:53:12 -07:00
..

meta-oe

This layer depends on:

URI: git://github.com/openembedded/openembedded-core.git branch: master

luajit recipe requires host compiler to be able to generate 32bit code when target is 32bit e.g. arm, so ensure that $CC -m32 is functional on build host, if building this recipe, needed packages to fullfit this might have different names on different host distributions e.g. on archlinux based distributions install prerequisites like below

pacman -S lib32-gcc-libs lib32-glibc

Ubuntu sudo apt-get install gcc-multilib linux-libc-dev:i386

Send pull requests to openembedded-devel@lists.openembedded.org with '[meta-oe]' in the subject'

When sending single patches, please use something like: 'git send-email -M -1 --to openembedded-devel@lists.openembedded.org --subject-prefix="meta-oe][PATCH"'

You are encouraged to fork the mirror on GitHub https://github.com/openembedded/meta-openembedded to share your patches, this is preferred for patch sets consisting of more than one patch.

Other services like GitLab, repo.or.cz or self-hosted setups are of course accepted as well, 'git fetch ' works the same on all of them. We recommend GitHub because it is free, easy to use, has been proven to be reliable and has a really good web GUI.

layer maintainer: Khem Raj raj.khem@gmail.com