perf trace augmented_syscalls: Hook into syscalls:sys_exit_SYSCALL too (f5b076dc) · Commits · 戴 / test

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>

tools/perf/examples/bpf/augmented_syscalls.c

+14 −0

Original line number	Diff line number	Diff line
		@@ -26,6 +26,12 @@ struct bpf_map SEC("maps") __augmented_syscalls__ = {
		.max_entries = __NR_CPUS__,
		};

		struct syscall_exit_args {
		unsigned long long common_tp_fields;
		long syscall_nr;
		long ret;
		};

		struct augmented_filename {
		int size;
		int reserved;
		@@ -49,6 +55,10 @@ int syscall_enter(syscall)(struct syscall_enter_##syscall##_args *args) \
		(sizeof(augmented_args) - sizeof(augmented_args.filename.value) + \
		augmented_args.filename.size)); \
		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 {
		@@ -116,6 +126,10 @@ int syscall_enter(syscall)(struct syscall_enter_##syscall##_args *args) \
		&augmented_args, \
		sizeof(augmented_args) - sizeof(augmented_args.addr) + addrlen); \
		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;

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