linux/tools
Song Liu 9b86d04d53 perf symbols: Introduce DSO_BINARY_TYPE__BPF_PROG_INFO
Introduce a new dso type DSO_BINARY_TYPE__BPF_PROG_INFO for BPF programs. In
symbol__disassemble(), DSO_BINARY_TYPE__BPF_PROG_INFO dso will call into a new
function symbol__disassemble_bpf() in an upcoming patch, where annotation line
information is filled based bpf_prog_info and btf saved in given perf_env.

Committer notes:

Removed the unnamed union with 'bpf_prog' and 'cache' in 'struct dso',
to fix this bug when exiting 'perf top':

  # perf top
  perf: Segmentation fault
  -------- backtrace --------
  perf[0x5a785a]
  /lib64/libc.so.6(+0x385bf)[0x7fd68443c5bf]
  perf(rb_first+0x2b)[0x4d6eeb]
  perf(dso__delete+0xb7)[0x4dffb7]
  perf[0x4f9e37]
  perf(perf_session__delete+0x64)[0x504df4]
  perf(cmd_top+0x1957)[0x454467]
  perf[0x4aad18]
  perf(main+0x61c)[0x42ec7c]
  /lib64/libc.so.6(__libc_start_main+0xf2)[0x7fd684428412]
  perf(_start+0x2d)[0x42eead]
  #
  # addr2line -fe ~/bin/perf 0x4dffb7
  dso_cache__free
  /home/acme/git/perf/tools/perf/util/dso.c:713

That is trying to access the dso->data.cache, and that is not used with
BPF programs, so we end up accessing what is in bpf_prog.first_member,
b00m.

Signed-off-by: Song Liu <songliubraving@fb.com>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stanislav Fomichev <sdf@google.com>
Cc: kernel-team@fb.com
Link: http://lkml.kernel.org/r/20190312053051.2690567-13-songliubraving@fb.com
[ split from a larger patch ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-03-19 16:52:07 -03:00
..
accounting delayacct: track delays from thrashing cache pages 2018-10-26 16:26:32 -07:00
arch tools headers uapi: Sync copy of asm-generic/unistd.h with the kernel sources 2019-03-11 16:13:04 -03:00
bpf bpftool: use bpf_program__get_prog_info_linear() in prog.c:do_dump() 2019-03-19 16:52:06 -03:00
build tools build feature sched_getcpu: Undef _GNU_SOURCE at the end 2019-02-14 15:39:21 -03:00
cgroup
crypto crypto: user - rename err_cnt parameter 2018-12-07 14:15:00 +08:00
firewire
firmware tools: Add 'firmware' category and add ihex2fw tool 2018-11-11 12:58:27 -08:00
gpio tools gpio: Allow overriding CFLAGS 2018-12-28 16:33:08 -03:00
hv Tools: hv: kvp: Fix a warning of buffer overflow with gcc 8.0.1 2018-11-11 12:58:27 -08:00
iio tools: iio: iio_generic_buffer: make num_loops signed 2019-01-12 18:17:56 +00:00
include tools headers uapi: Update linux/in.h copy 2019-03-11 16:13:05 -03:00
kvm/kvm_stat tools/kvm_stat: switch to python3 2018-11-27 12:53:44 +01:00
laptop
leds
lib tools lib bpf: Introduce bpf_program__get_prog_info_linear() 2019-03-19 16:52:06 -03:00
memory-model tools/memory-model: Make scripts take "-j" abbreviation for "--jobs" 2019-01-21 11:07:04 +01:00
nfsd
objtool objtool: Fix segfault in .cold detection with -ffunction-sections 2018-11-20 18:59:00 +01:00
pci tools: PCI: Change pcitest compiling process 2018-10-03 11:19:52 +01:00
pcmcia
perf perf symbols: Introduce DSO_BINARY_TYPE__BPF_PROG_INFO 2019-03-19 16:52:07 -03:00
power perf/core improvements and fixes: 2019-01-03 14:05:16 +01:00
scripts
spi spi: spidev_test: Improve decoded text part of hex dump 2018-09-04 17:00:37 +01:00
testing Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-03-05 14:49:11 -08:00
thermal/tmon tools thermal tmon: Use -O3 instead of -O1 if available 2019-01-04 12:54:49 -03:00
time
usb usbip: tools: fix atoi() on non-null terminated string 2018-10-18 19:44:39 +02:00
virtio virtio: fix test build after uio.h change 2018-12-19 18:23:49 -05:00
vm tools/vm/page_owner: use page_owner_sort in the use example 2019-01-08 17:15:11 -08:00
wmi
Makefile tools: Add 'firmware' category and add ihex2fw tool 2018-11-11 12:58:27 -08:00