• Ian Rogers's avatar
    perf trace: hello fix libbpf 1.0+ compatibility · 514607e3
    Ian Rogers authored
    Don't use deprecated and now broken map style. Avoid use of
    tools/perf/include/bpf/bpf.h and use the more regular BPF headers.
    
    Switch to raw_syscalls:sys_enter to avoid the evlist being empty and
    fixing generating output.
    
    Committer testing:
    
      # perf trace -e ~acme/git/perf/tools/perf/examples/bpf/hello.c --call-graph=dwarf --max-events 5
         0.000 perf/206852 __bpf_stdout__(Hello, world)
                                           syscall_trace_enter.constprop.0 ([kernel.kallsyms])
                                           syscall_trace_enter.constprop.0 ([kernel.kallsyms])
                                           do_syscall_64 ([kernel.kallsyms])
                                           entry_SYSCALL_64_after_hwframe ([kernel.kallsyms])
                                           __GI___sched_setaffinity_new (/usr/lib64/libc.so.6)
         8.561 pipewire/2290 __bpf_stdout__(Hello, world)
                                           syscall_trace_enter.constprop.0 ([kernel.kallsyms])
                                           syscall_trace_enter.constprop.0 ([kernel.kallsyms])
                                           do_syscall_64 ([kernel.kallsyms])
                                           entry_SYSCALL_64_after_hwframe ([kernel.kallsyms])
                                           __libc_read (/usr/lib64/libc.so.6)
         8.571 pipewire/2290 __bpf_stdout__(Hello, world)
                                           syscall_trace_enter.constprop.0 ([kernel.kallsyms])
                                           syscall_trace_enter.constprop.0 ([kernel.kallsyms])
                                           do_syscall_64 ([kernel.kallsyms])
                                           entry_SYSCALL_64_after_hwframe ([kernel.kallsyms])
                                           __GI___ioctl (/usr/lib64/libc.so.6)
         8.586 pipewire/2290 __bpf_stdout__(Hello, world)
                                           syscall_trace_enter.constprop.0 ([kernel.kallsyms])
                                           syscall_trace_enter.constprop.0 ([kernel.kallsyms])
                                           do_syscall_64 ([kernel.kallsyms])
                                           entry_SYSCALL_64_after_hwframe ([kernel.kallsyms])
                                           __GI___write (/usr/lib64/libc.so.6)
         8.592 pipewire/2290 __bpf_stdout__(Hello, world)
                                           syscall_trace_enter.constprop.0 ([kernel.kallsyms])
                                           syscall_trace_enter.constprop.0 ([kernel.kallsyms])
                                           do_syscall_64 ([kernel.kallsyms])
                                           entry_SYSCALL_64_after_hwframe ([kernel.kallsyms])
                                           __timerfd_settime (/usr/lib64/libc.so.6)
      #
    Signed-off-by: default avatarIan Rogers <irogers@google.com>
    Tested-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: Jiri Olsa <jolsa@kernel.org>
    Cc: Leo Yan <leo.yan@linaro.org>
    Cc: Mark Rutland <mark.rutland@arm.com>
    Cc: Namhyung Kim <namhyung@kernel.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Stephane Eranian <eranian@google.com>
    Link: https://lore.kernel.org/r/20221103045437.163510-5-irogers@google.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    514607e3
hello.c 672 Bytes