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authorArnaldo Carvalho de Melo <acme@redhat.com>2018-12-17 11:59:35 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2018-12-18 16:15:18 -0300
commitc48ee107bb387f76b089e0c30e1fed26e8d921f0 (patch)
tree983c240862167890d713d550b81dced675fad552 /tools/perf/examples
parent4b8a240ed5e0a4e6b53c994ddfcff86a06879a66 (diff)
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perf augmented_raw_syscalls: Copy 'access' arg as well
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 <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-lw3i2atyq8549fpqwmszn3qp@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/examples')
-rw-r--r--tools/perf/examples/bpf/augmented_raw_syscalls.c2
1 files changed, 2 insertions, 0 deletions
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;