Hou Tao 47df8a2f78 bpf, perf: Use subprog name when reporting subprog ksymbol ... Since commit bfea9a8574 ("bpf: Add name to struct bpf_ksym"), when reporting subprog ksymbol to perf, prog name instead of subprog name is used. The backtrace of bpf program with subprogs will be incorrect as shown below: ffffffffc02deace bpf_prog_e44a3057dcb151f8_overwrite+0x66 ffffffffc02de9f7 bpf_prog_e44a3057dcb151f8_overwrite+0x9f ffffffffa71d8d4e trace_call_bpf+0xce ffffffffa71c2938 perf_call_bpf_enter.isra.0+0x48 overwrite is the entry program and it invokes the overwrite_htab subprog through bpf_loop, but in above backtrace, overwrite program just jumps inside itself. Fixing it by using subprog name when reporting subprog ksymbol. After the fix, the output of perf script will be correct as shown below: ffffffffc031aad2 bpf_prog_37c0bec7d7c764a4_overwrite_htab+0x66 ffffffffc031a9e7 bpf_prog_c7eb827ef4f23e71_overwrite+0x9f ffffffffa3dd8d4e trace_call_bpf+0xce ffffffffa3dc2938 perf_call_bpf_enter.isra.0+0x48 Fixes: bfea9a8574 ("bpf: Add name to struct bpf_ksym") Signed-off-by: Hou Tao <houtao1@huawei.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Jiri Olsa <jolsa@kernel.org> Link: https://lore.kernel.org/bpf/20221114095733.158588-1-houtao@huaweicloud.com		2022-11-15 15:36:57 +01:00
..
Makefile	perf/hw_breakpoint: Add KUnit test for constraints accounting	2022-08-30 10:56:20 +02:00
callchain.c	uaccess: remove CONFIG_SET_FS	2022-02-25 09:36:06 +01:00
core.c	bpf, perf: Use subprog name when reporting subprog ksymbol	2022-11-15 15:36:57 +01:00
hw_breakpoint.c	perf/hw_breakpoint: Annotate tsk->perf_event_mutex vs ctx->mutex	2022-10-04 13:32:09 +02:00
hw_breakpoint_test.c	perf/hw_breakpoint: test: Skip the test if dependencies unmet	2022-11-02 12:22:05 +01:00
internal.h	perf/core: Fix perf_mmap fail when CONFIG_PERF_USE_VMALLOC enabled	2022-04-19 21:15:42 +02:00
ring_buffer.c	perf: Fix missing SIGTRAPs	2022-10-17 16:32:05 +02:00
uprobes.c	mm/madvise: add file and shmem support to MADV_COLLAPSE	2022-10-03 14:03:33 -07:00