0fa0edaf32
The previous patches added the use of print_fmt string and changes the trace_define_field() function to also create the fields and format output for the event format files. text data bss dec hex filename 5857201 1355780 9336808 16549789 fc879d vmlinux 5884589 1351684 9337896 16574169 fce6d9 vmlinux-orig The above shows the size of the vmlinux after this patch set compared to the vmlinux-orig which is before the patch set. This saves us 27k on text, 1k on bss and adds just 4k of data. The total savings of 24k in size. Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> LKML-Reference: <4B273D4D.40604@cn.fujitsu.com> Acked-by: Masami Hiramatsu <mhiramat@redhat.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
#ifndef _TRACE_SYSCALL_H
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#define _TRACE_SYSCALL_H
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#include <linux/tracepoint.h>
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#include <linux/unistd.h>
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#include <linux/ftrace_event.h>
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#include <asm/ptrace.h>
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/*
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* A syscall entry in the ftrace syscalls array.
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*
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* @name: name of the syscall
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* @syscall_nr: number of the syscall
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* @nb_args: number of parameters it takes
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* @types: list of types as strings
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* @args: list of args as strings (args[i] matches types[i])
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* @enter_event: associated syscall_enter trace event
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* @exit_event: associated syscall_exit trace event
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*/
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struct syscall_metadata {
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const char *name;
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int syscall_nr;
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int nb_args;
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const char **types;
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const char **args;
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struct ftrace_event_call *enter_event;
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struct ftrace_event_call *exit_event;
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};
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#ifdef CONFIG_FTRACE_SYSCALLS
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extern unsigned long arch_syscall_addr(int nr);
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extern int init_syscall_trace(struct ftrace_event_call *call);
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extern int syscall_enter_define_fields(struct ftrace_event_call *call);
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extern int syscall_exit_define_fields(struct ftrace_event_call *call);
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extern int reg_event_syscall_enter(struct ftrace_event_call *call);
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extern void unreg_event_syscall_enter(struct ftrace_event_call *call);
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extern int reg_event_syscall_exit(struct ftrace_event_call *call);
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extern void unreg_event_syscall_exit(struct ftrace_event_call *call);
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extern int
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ftrace_format_syscall(struct ftrace_event_call *call, struct trace_seq *s);
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enum print_line_t print_syscall_enter(struct trace_iterator *iter, int flags);
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enum print_line_t print_syscall_exit(struct trace_iterator *iter, int flags);
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#endif
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#ifdef CONFIG_EVENT_PROFILE
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int prof_sysenter_enable(struct ftrace_event_call *call);
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void prof_sysenter_disable(struct ftrace_event_call *call);
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int prof_sysexit_enable(struct ftrace_event_call *call);
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void prof_sysexit_disable(struct ftrace_event_call *call);
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#endif
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#endif /* _TRACE_SYSCALL_H */
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