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tracing: Add syscall tracepoints

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add two tracepoints in syscall exit and entry path, conditioned on
TIF_SYSCALL_FTRACE. Supports the syscall trace event code.

Signed-off-by: Jason Baron <jbaron@redhat.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Jiaying Zhang <jiayingz@google.com>
Cc: Martin Bligh <mbligh@google.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
This commit is contained in:
Jason Baron
2009-08-10 16:52:31 -04:00
committed by Frederic Weisbecker
parent 63fbdab315
commit a871bd33a6
3 changed files with 63 additions and 2 deletions
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7
arch/x86/kernel/ptrace.c
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@@ -37,6 +37,9 @@
#include <trace/syscall.h>
DEFINE_TRACE(syscall_enter);
DEFINE_TRACE(syscall_exit);
#include "tls.h"
enum x86_regset {
@@ -1498,7 +1501,7 @@ asmregparm long syscall_trace_enter(struct pt_regs *regs)
ret = -1L;
if (unlikely(test_thread_flag(TIF_SYSCALL_FTRACE)))
ftrace_syscall_enter(regs);
trace_syscall_enter(regs, regs->orig_ax);
if (unlikely(current->audit_context)) {
if (IS_IA32)
@@ -1524,7 +1527,7 @@ asmregparm void syscall_trace_leave(struct pt_regs *regs)
audit_syscall_exit(AUDITSC_RESULT(regs->ax), regs->ax);
if (unlikely(test_thread_flag(TIF_SYSCALL_FTRACE)))
ftrace_syscall_exit(regs);
trace_syscall_exit(regs, regs->ax);
if (test_thread_flag(TIF_SYSCALL_TRACE))
tracehook_report_syscall_exit(regs, 0);