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| author | Masami Hiramatsu <mhiramat@kernel.org> | 2018-04-25 14:21:26 +0200 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2018-10-11 04:19:11 +0200 |
| commit | a1303af5d79eb13a658633a9fb0ce3aed0f7decf (patch) | |
| tree | 06ab7627ff3bec7afcba894432a5798babd3e0bc /kernel/trace/trace_uprobe.c | |
| parent | x86: ptrace: Add function argument access API (diff) | |
| download | linux-a1303af5d79eb13a658633a9fb0ce3aed0f7decf.tar.xz linux-a1303af5d79eb13a658633a9fb0ce3aed0f7decf.zip | |
tracing: probeevent: Add $argN for accessing function args
Add $argN special fetch variable for accessing function
arguments. This allows user to trace the Nth argument easily
at the function entry.
Note that this returns most probably assignment of registers
and stacks. In some case, it may not work well. If you need
to access correct registers or stacks you should use perf-probe.
Link: http://lkml.kernel.org/r/152465888632.26224.3412465701570253696.stgit@devbox
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace_uprobe.c')
| -rw-r--r-- | kernel/trace/trace_uprobe.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index 7154473ffaa4..394b93572506 100644 --- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -557,7 +557,7 @@ static int create_trace_uprobe(int argc, char **argv) /* Parse fetch argument */ ret = traceprobe_parse_probe_arg(arg, &tu->tp.size, parg, - is_return, false); + is_return ? TPARG_FL_RETURN : 0); if (ret) { pr_info("Parse error at argument[%d]. (%d)\n", i, ret); goto error; |