From 64c12e0444fcc6b75eb49144ba46d43dbdc6bc8f Mon Sep 17 00:00:00 2001 From: Jason Baron Date: Mon, 10 Aug 2009 16:52:53 -0400 Subject: tracing: Add individual syscalls tracepoint id support The current state of syscalls tracepoints generates only one event id for every syscall events. This patch associates an id with each syscall trace event, so that we can identify each syscall trace event using the 'perf' tool. Signed-off-by: Jason Baron Cc: Lai Jiangshan Cc: Steven Rostedt Cc: Peter Zijlstra Cc: Mathieu Desnoyers Cc: Jiaying Zhang Cc: Martin Bligh Cc: Li Zefan Cc: Masami Hiramatsu Signed-off-by: Frederic Weisbecker --- include/linux/syscalls.h | 22 ++++++++++++++++++---- include/trace/syscall.h | 8 ++++++++ 2 files changed, 26 insertions(+), 4 deletions(-) (limited to 'include') diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index 5e5b4d3..ce4b01c 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -116,13 +116,20 @@ struct perf_counter_attr; #define SYSCALL_TRACE_ENTER_EVENT(sname) \ static struct ftrace_event_call event_enter_##sname; \ + struct trace_event enter_syscall_print_##sname = { \ + .trace = print_syscall_enter, \ + }; \ static int init_enter_##sname(void) \ { \ - int num; \ + int num, id; \ num = syscall_name_to_nr("sys"#sname); \ if (num < 0) \ return -ENOSYS; \ - register_ftrace_event(&event_syscall_enter); \ + id = register_ftrace_event(&enter_syscall_print_##sname);\ + if (!id) \ + return -ENODEV; \ + event_enter_##sname.id = id; \ + set_syscall_enter_id(num, id); \ INIT_LIST_HEAD(&event_enter_##sname.fields); \ init_preds(&event_enter_##sname); \ return 0; \ @@ -142,13 +149,20 @@ struct perf_counter_attr; #define SYSCALL_TRACE_EXIT_EVENT(sname) \ static struct ftrace_event_call event_exit_##sname; \ + struct trace_event exit_syscall_print_##sname = { \ + .trace = print_syscall_exit, \ + }; \ static int init_exit_##sname(void) \ { \ - int num; \ + int num, id; \ num = syscall_name_to_nr("sys"#sname); \ if (num < 0) \ return -ENOSYS; \ - register_ftrace_event(&event_syscall_exit); \ + id = register_ftrace_event(&exit_syscall_print_##sname);\ + if (!id) \ + return -ENODEV; \ + event_exit_##sname.id = id; \ + set_syscall_exit_id(num, id); \ INIT_LIST_HEAD(&event_exit_##sname.fields); \ init_preds(&event_exit_##sname); \ return 0; \ diff --git a/include/trace/syscall.h b/include/trace/syscall.h index 73fb8b4..df62840 100644 --- a/include/trace/syscall.h +++ b/include/trace/syscall.h @@ -32,23 +32,31 @@ DECLARE_TRACE_WITH_CALLBACK(syscall_exit, * @nb_args: number of parameters it takes * @types: list of types as strings * @args: list of args as strings (args[i] matches types[i]) + * @enter_id: associated ftrace enter event id + * @exit_id: associated ftrace exit event id */ struct syscall_metadata { const char *name; int nb_args; const char **types; const char **args; + int enter_id; + int exit_id; }; #ifdef CONFIG_FTRACE_SYSCALLS extern struct syscall_metadata *syscall_nr_to_meta(int nr); extern int syscall_name_to_nr(char *name); +void set_syscall_enter_id(int num, int id); +void set_syscall_exit_id(int num, int id); extern struct trace_event event_syscall_enter; extern struct trace_event event_syscall_exit; extern int reg_event_syscall_enter(void *ptr); extern void unreg_event_syscall_enter(void *ptr); extern int reg_event_syscall_exit(void *ptr); extern void unreg_event_syscall_exit(void *ptr); +enum print_line_t print_syscall_enter(struct trace_iterator *iter, int flags); +enum print_line_t print_syscall_exit(struct trace_iterator *iter, int flags); #endif #endif /* _TRACE_SYSCALL_H */ -- cgit v1.1