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3b573bf318
The bpf.h file needed gets installed in /usr/lib/include/perf/bpf/bpf.h,
and /usr/lib/include/perf/ is added to the include path passed to clang
to build the eBPF bytecode, so just remove "bpf/", its directly in the
path passed already. This was working by accident, fix it.
I.e. now this is back working:
# cat /home/acme/git/perf/tools/perf/examples/bpf/hello.c
#include <stdio.h>
int syscall_enter(openat)(void *args)
{
puts("Hello, world\n");
return 0;
}
license(GPL);
# perf trace -e /home/acme/git/perf/tools/perf/examples/bpf/hello.c
0.000 pickup/21493 __bpf_stdout__(Hello, world)
56.462 sh/13539 __bpf_stdout__(Hello, world)
56.536 sh/13539 __bpf_stdout__(Hello, world)
56.673 sh/13539 __bpf_stdout__(Hello, world)
56.781 sh/13539 __bpf_stdout__(Hello, world)
56.707 perf/13182 __bpf_stdout__(Hello, world)
56.849 perf/13182 __bpf_stdout__(Hello, world)
^C
#
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-d9myswhgo8gfi3vmehdqpxa7@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
17 lines
456 B
C
17 lines
456 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <bpf.h>
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struct bpf_map SEC("maps") __bpf_stdout__ = {
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.type = BPF_MAP_TYPE_PERF_EVENT_ARRAY,
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.key_size = sizeof(int),
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.value_size = sizeof(u32),
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.max_entries = __NR_CPUS__,
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};
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#define puts(from) \
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({ const int __len = sizeof(from); \
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char __from[__len] = from; \
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perf_event_output(args, &__bpf_stdout__, BPF_F_CURRENT_CPU, \
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&__from, __len & (sizeof(from) - 1)); })
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