Andrii Nakryiko a111f8e113 libbpf: Accommodate DWARF/compiler bug with duplicated structs ... [ Upstream commit efdd3eb801 ] According to [0], compilers sometimes might produce duplicate DWARF definitions for exactly the same struct/union within the same compilation unit (CU). We've had similar issues with identical arrays and handled them with a similar workaround in 6b6e6b1d09 ("libbpf: Accomodate DWARF/compiler bug with duplicated identical arrays"). Do the same for struct/union by ensuring that two structs/unions are exactly the same, down to the integer values of field referenced type IDs. Solving this more generically (allowing referenced types to be equivalent, but using different type IDs, all within a single CU) requires a huge complexity increase to handle many-to-many mappings between canonidal and candidate type graphs. Before we invest in that, let's see if this approach handles all the instances of this issue in practice. Thankfully it's pretty rare, it seems. [0] https://lore.kernel.org/bpf/YXr2NFlJTAhHdZqq@krava/ Reported-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20211117194114.347675-1-andrii@kernel.org Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-01-27 11:04:28 +01:00
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api	tools api fs: Cache cgroupfs mount point	2021-02-17 15:09:08 -03:00
bpf	libbpf: Accommodate DWARF/compiler bug with duplicated structs	2022-01-27 11:04:28 +01:00
lockdep	.gitignore: add SPDX License Identifier	2020-03-25 11:50:48 +01:00
perf	libperf tests: Fix test_stat_cpu	2021-10-14 15:41:35 -03:00
subcmd	libsubcmd: add OPT_UINTEGER_OPTARG option type	2021-08-31 15:44:05 -03:00
symbol	libsymbols kallsyms: Move hex2u64 out of header	2020-05-05 16:35:32 -03:00
traceevent	KVM: x86/mmu: Rename "nxe" role bit to "efer_nx" for macro shenanigans	2021-06-24 18:00:41 -04:00
argv_split.c	tools lib: Move argv_{split,free} from tools/perf/util/	2019-07-01 22:50:40 -03:00
bitmap.c	tools lib: Adopt bitmap_intersects() operation from the kernel sources	2021-06-30 15:28:00 -03:00
ctype.c	tools perf: Move from sane_ctype.h obtained from git to the Linux's original	2019-06-25 21:02:47 -03:00
find_bit.c	tools: sync lib/find_bit implementation	2021-05-06 19:24:12 -07:00
hweight.c
rbtree.c	tools/: replace HTTP links with HTTPS ones	2020-08-07 11:33:21 -07:00
str_error_r.c
string.c	tools lib: Adopt memchr_inv() from kernel	2020-11-27 08:34:52 -03:00
vsprintf.c	perf script: Pad DSO name for --call-trace	2019-05-28 18:37:44 -03:00
zalloc.c	tools lib: Adopt zalloc()/zfree() from tools/perf	2019-07-09 10:13:26 -03:00