diff options
Diffstat (limited to 'tools/perf/examples')
| -rw-r--r-- | tools/perf/examples/bpf/augmented_syscalls.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/tools/perf/examples/bpf/augmented_syscalls.c b/tools/perf/examples/bpf/augmented_syscalls.c index 10e7997ab481..93960e891478 100644 --- a/tools/perf/examples/bpf/augmented_syscalls.c +++ b/tools/perf/examples/bpf/augmented_syscalls.c @@ -27,6 +27,12 @@ struct bpf_map SEC("maps") __augmented_syscalls__ = { .max_entries = __NR_CPUS__, }; +struct augmented_filename { + int size; + int reserved; + char value[256]; +}; + struct syscall_enter_openat_args { unsigned long long common_tp_fields; long syscall_nr; @@ -38,17 +44,20 @@ struct syscall_enter_openat_args { struct augmented_enter_openat_args { struct syscall_enter_openat_args args; - char filename[64]; + struct augmented_filename filename; }; int syscall_enter(openat)(struct syscall_enter_openat_args *args) { - struct augmented_enter_openat_args augmented_args; + struct augmented_enter_openat_args augmented_args = { .filename.reserved = 0, }; probe_read(&augmented_args.args, sizeof(augmented_args.args), args); - probe_read_str(&augmented_args.filename, sizeof(augmented_args.filename), args->filename_ptr); + augmented_args.filename.size = probe_read_str(&augmented_args.filename.value, + sizeof(augmented_args.filename.value), + args->filename_ptr); perf_event_output(args, &__augmented_syscalls__, BPF_F_CURRENT_CPU, - &augmented_args, sizeof(augmented_args)); + &augmented_args, + sizeof(augmented_args) - sizeof(augmented_args.filename.value) + augmented_args.filename.size); return 0; } |