diff options
| author | Arnaldo Carvalho de Melo <[email protected]> | 2015-08-04 22:17:29 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <[email protected]> | 2015-08-05 10:52:40 -0300 |
| commit | e4d44e830a4bbeb0cf6fdd24c24794a2e599e26d (patch) | |
| tree | dd7df994772393e772d331c9d5c75cfc10aba36f | |
| parent | 08c987763ad3bc1aef133bcac073198ff86efa85 (diff) | |
perf trace: Use a constant for the syscall formatting buffer
We were using it as a magic number, 1024, fix that.
Eventually we need to stop doing it per line, and do it per
arg, traversing the args at output time, to avoid the memmove()
calls that will be used in the next cset to replace pointers
present at raw_syscalls:sys_enter time with its contents that
appear at probe:vfs_getname time, before raw_syscalls:sys_exit
time.
Cc: Adrian Hunter <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Milian Wolff <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Stephane Eranian <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
| -rw-r--r-- | tools/perf/builtin-trace.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index aa1e2888c81d..12d6fc0227b1 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -1262,6 +1262,8 @@ fail: #define TRACE_PFMAJ (1 << 0) #define TRACE_PFMIN (1 << 1) +static const size_t trace__entry_str_size = 2048; + struct trace { struct perf_tool tool; struct { @@ -1822,7 +1824,7 @@ static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel, args = perf_evsel__sc_tp_ptr(evsel, args, sample); if (ttrace->entry_str == NULL) { - ttrace->entry_str = malloc(1024); + ttrace->entry_str = malloc(trace__entry_str_size); if (!ttrace->entry_str) goto out_put; } @@ -1832,9 +1834,9 @@ static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel, ttrace->entry_time = sample->time; msg = ttrace->entry_str; - printed += scnprintf(msg + printed, 1024 - printed, "%s(", sc->name); + printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name); - printed += syscall__scnprintf_args(sc, msg + printed, 1024 - printed, + printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed, args, trace, thread); if (sc->is_exit) { |