From: Arnaldo Carvalho de Melo <[email protected]> This will all come from userspace, but to test the changes to make 'perf trace' output similar to strace's, do this one more now manually.
To update the precompiled augmented_raw_syscalls.o binary I just run: # perf record -e ~acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.c sleep 1 LLVM: dumping /home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.022 MB perf.data ] # Because to have augmented_raw_syscalls to be always used and a fast startup and remove the need to have the llvm toolchain installed, I'm using: # perf config | grep add_events trace.add_events=/home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o # So when doing changes to augmented_raw_syscals.c one needs to rebuild the .o file. This will be done automagically later, i.e. have a 'make' behaviour of recompiling when the .c gets changed. Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Luis Cláudio Gonçalves <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Wang Nan <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> --- tools/perf/examples/bpf/augmented_raw_syscalls.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/perf/examples/bpf/augmented_raw_syscalls.c b/tools/perf/examples/bpf/augmented_raw_syscalls.c index 6c5db6baeb3a..53c233370fae 100644 --- a/tools/perf/examples/bpf/augmented_raw_syscalls.c +++ b/tools/perf/examples/bpf/augmented_raw_syscalls.c @@ -55,6 +55,7 @@ struct augmented_filename { }; #define SYS_OPEN 2 +#define SYS_ACCESS 21 #define SYS_OPENAT 257 pid_filter(pids_filtered); @@ -119,6 +120,7 @@ int sys_enter(struct syscall_enter_args *args) * after the ctx memory access to prevent their down stream merging. */ switch (augmented_args.args.syscall_nr) { + case SYS_ACCESS: case SYS_OPEN: filename_arg = (const void *)args->args[0]; __asm__ __volatile__("": : :"memory"); break; -- 2.19.2
