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perf trace augmented_syscalls: Hook into syscalls:sys_exit_SYSCALL too

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Hook the pair enter/exit when using augmented_{filename,sockaddr,etc}_syscall(),
this way we'll be able to see what entries are in the ELF sections generated
from augmented_syscalls.c and filter them out from the main raw_syscalls:*
tracepoints used by 'perf trace'.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-cyav42qj5yylolw4attcw99z@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2018-08-30 12:32:35 -03:00
parent 4c8f0a726e
commit f5b076dc01
1 changed files with 14 additions and 0 deletions
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14
tools/perf/examples/bpf/augmented_syscalls.c
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@ -26,6 +26,12 @@ struct bpf_map SEC("maps") __augmented_syscalls__ = {
.max_entries = __NR_CPUS__, .max_entries = __NR_CPUS__,
}; };
struct syscall_exit_args {
unsigned long long common_tp_fields;
long syscall_nr;
long ret;
};
struct augmented_filename { struct augmented_filename {
int size; int size;
int reserved; int reserved;
@ -49,6 +55,10 @@ int syscall_enter(syscall)(struct syscall_enter_##syscall##_args *args) \
(sizeof(augmented_args) - sizeof(augmented_args.filename.value) + \ (sizeof(augmented_args) - sizeof(augmented_args.filename.value) + \
augmented_args.filename.size)); \ augmented_args.filename.size)); \
return 0; \ return 0; \
} \
int syscall_exit(syscall)(struct syscall_exit_args *args) \
{ \
return 1; /* 0 as soon as we start copying data returned by the kernel, e.g. 'read' */ \
} }
struct syscall_enter_openat_args { struct syscall_enter_openat_args {
@ -116,6 +126,10 @@ int syscall_enter(syscall)(struct syscall_enter_##syscall##_args *args) \
&augmented_args, \ &augmented_args, \
sizeof(augmented_args) - sizeof(augmented_args.addr) + addrlen); \ sizeof(augmented_args) - sizeof(augmented_args.addr) + addrlen); \
return 0; \ return 0; \
} \
int syscall_exit(syscall)(struct syscall_exit_args *args) \
{ \
return 1; /* 0 as soon as we start copying data returned by the kernel, e.g. 'read' */ \
} }
struct sockaddr; struct sockaddr;