lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Merge branch 'tip/tracing/ftrace' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into tracing/ftrace

Browse Source
This commit is contained in:
Ingo Molnar
2009-03-17 10:37:37 +01:00
parent c269fc8c53 6adaad14d7
commit 4176935b58
6 changed files with 51 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
kernel/trace/trace.c
View File

@@ -770,30 +770,34 @@ static void trace_save_cmdline(struct task_struct *tsk)
__raw_spin_unlock(&trace_cmdline_lock);
}
char *trace_find_cmdline(int pid)
void trace_find_cmdline(int pid, char comm[])
{
char *cmdline = "<...>";
unsigned map;
if (!pid)
return "<idle>";
if (!pid) {
strcpy(comm, "<idle>");
return;
}
if (pid > PID_MAX_DEFAULT)
goto out;
if (pid > PID_MAX_DEFAULT) {
strcpy(comm, "<...>");
return;
}
__raw_spin_lock(&trace_cmdline_lock);
map = map_pid_to_cmdline[pid];
if (map >= SAVED_CMDLINES)
goto out;
cmdline = saved_cmdlines[map];
strcpy(comm, saved_cmdlines[map]);
out:
return cmdline;
__raw_spin_unlock(&trace_cmdline_lock);
}
void tracing_record_cmdline(struct task_struct *tsk)
{
if (atomic_read(&trace_record_cmdline_disabled))
if (atomic_read(&trace_record_cmdline_disabled) || !tracing_is_on())
return;
trace_save_cmdline(tsk);