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6e057fc15a
linux/tools
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Yonghong Song 6e057fc15a selftests/bpf: Define string const as global for test_sysctl_prog.c 
When tweaking llvm optimizations, I found that selftest build failed
with the following error:
  libbpf: elf: skipping unrecognized data section(6) .rodata.str1.1
  libbpf: prog 'sysctl_tcp_mem': bad map relo against '.L__const.is_tcp_mem.tcp_mem_name'
          in section '.rodata.str1.1'
  Error: failed to open BPF object file: Relocation failed
  make: *** [/work/net-next/tools/testing/selftests/bpf/test_sysctl_prog.skel.h] Error 255
  make: *** Deleting file `/work/net-next/tools/testing/selftests/bpf/test_sysctl_prog.skel.h'

The local string constant "tcp_mem_name" is put into '.rodata.str1.1' section
which libbpf cannot handle. Using untweaked upstream llvm, "tcp_mem_name"
is completely inlined after loop unrolling.

Commit 7fb5eefd76 ("selftests/bpf: Fix test_sysctl_loop{1, 2}
failure due to clang change") solved a similar problem by defining
the string const as a global. Let us do the same here
for test_sysctl_prog.c so it can weather future potential llvm changes.

Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200910202718.956042-1-yhs@fb.com
2020-09-10 20:01:53 -07:00
..
accounting
arch tools headers kvm s390: Sync headers with the kernel sources 2020-08-12 08:52:32 -03:00
bootconfig tools/bootconfig: Add testcases for value override operator 2020-08-03 16:22:29 -04:00
bpf tools: bpftool: Add "inner_map" to "bpftool map create" outer maps 2020-09-10 17:29:21 -07:00
build tools, bpf/build: Cleanup feature files on make clean 2020-08-28 14:04:27 +02:00
cgroup tools/cgroup: add memcg_slabinfo.py tool 2020-08-07 11:33:25 -07:00
debugging
edid
firewire
firmware
gpio tools: gpio: fix spurious close warning in gpio-event-mon 2020-07-12 10:22:01 +02:00
hv tools: hv: change http to https in hv_kvp_daemon.c 2020-07-06 10:46:23 +00:00
iio
include tools, bpf: Synchronise BPF UAPI header with tools 2020-09-07 16:31:18 +02:00
io_uring io_uring: change the poll type to be 32-bits 2020-06-21 20:44:00 -06:00
kvm/kvm_stat
laptop
leds
lib libbpf: Fix potential multiplication overflow 2020-09-04 14:35:12 +02:00
memory-model These were the main changes in this cycle: 2020-08-03 14:39:35 -07:00
nfsd
objtool Misc updates: 2020-08-03 14:45:33 -07:00
pci
pcmcia
perf perf: Stop using deprecated bpf_program__title() 2020-09-09 11:28:28 -07:00
power ACPI updates for 5.9-rc1 2020-08-03 20:37:22 -07:00
scripts
spi spi: tools: Make default_tx/rx and input_tx static 2020-06-11 16:27:24 +01:00
testing selftests/bpf: Define string const as global for test_sysctl_prog.c 2020-09-10 20:01:53 -07:00
thermal/tmon
time
usb tools: usb: usbip: Replace HTTP links with HTTPS ones 2020-07-15 16:33:51 +02:00
virtio virtio: fixes, features 2020-08-11 14:34:17 -07:00
vm
wmi
Makefile bpf: Compile resolve_btfids tool at kernel compilation start 2020-07-13 10:42:02 -07:00