diff options
| -rw-r--r-- | tools/perf/examples/bpf/augmented_syscalls.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/tools/perf/examples/bpf/augmented_syscalls.c b/tools/perf/examples/bpf/augmented_syscalls.c index be06d2c9e8c9..bfa28eaf27b3 100644 --- a/tools/perf/examples/bpf/augmented_syscalls.c +++ b/tools/perf/examples/bpf/augmented_syscalls.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 /* - * Augment the openat syscall with the contents of the filename pointer argument. + * Augment syscalls with the contents of the pointer arguments. * * Test it with: * @@ -10,12 +10,10 @@ * the last one should be the one for '/etc/passwd'. * * This matches what is marshalled into the raw_syscall:sys_enter payload - * expected by the 'perf trace' beautifiers, and can be used by them unmodified, - * which will be done as that feature is implemented in the next csets, for now - * it will appear in a dump done by the default tracepoint handler in 'perf trace', - * that uses bpf_output__fprintf() to just dump those contents, as done with - * the bpf-output event associated with the __bpf_output__ map declared in - * tools/perf/include/bpf/stdio.h. + * expected by the 'perf trace' beautifiers, and can be used by them, that will + * check if perf_sample->raw_data is more than what is expected for each + * syscalls:sys_{enter,exit}_SYSCALL tracepoint, uing the extra data as the + * contents of pointer arguments. */ #include <stdio.h> |