From: Andi Kleen <[email protected]> When debugging the tui browser I find it useful to redirect the debug log into a file. Currently it's always forced to the message line.
Add an option to force it to stderr. Then it can be easily redirected. Example: [root@zoo ~]# perf --debug stderr report -vv 2> /tmp/debug [root@zoo ~]# tail /tmp/debug dso open failed, mmap: No such file or directory dso open failed, mmap: No such file or directory dso open failed, mmap: No such file or directory dso open failed, mmap: No such file or directory dso open failed, mmap: No such file or directory Using /root/.debug/.build-id/4e/841948927029fb650132253642d5dbb2c1fb93 for symbols Failed to open /tmp/perf-8831.map, continuing without symbols Failed to open /tmp/perf-12721.map, continuing without symbols Failed to open /tmp/perf-6966.map, continuing without symbols Failed to open /tmp/perf-8802.map, continuing without symbols [root@zoo ~]# Signed-off-by: Andi Kleen <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> --- tools/perf/util/debug.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/debug.c b/tools/perf/util/debug.c index ba357f3226c6..ad60b2f20258 100644 --- a/tools/perf/util/debug.c +++ b/tools/perf/util/debug.c @@ -19,13 +19,14 @@ int verbose; bool dump_trace = false, quiet = false; int debug_ordered_events; +static int redirect_to_stderr; static int _eprintf(int level, int var, const char *fmt, va_list args) { int ret = 0; if (var >= level) { - if (use_browser >= 1) + if (use_browser >= 1 && !redirect_to_stderr) ui_helpline__vshow(fmt, args); else ret = vfprintf(stderr, fmt, args); @@ -145,6 +146,7 @@ static struct debug_variable { } debug_variables[] = { { .name = "verbose", .ptr = &verbose }, { .name = "ordered-events", .ptr = &debug_ordered_events}, + { .name = "stderr", .ptr = &redirect_to_stderr}, { .name = NULL, } }; -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
