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perf trace: Fix ')' placement in "interrupted" syscall lines 

When we get the sys_enter for a syscall we check if the last one is
still waiting for its matching sys_exit, if so we print this:

   468.753 (         ): firefox/32382 poll(ufds: 0x7f3988d3dd00, nfds: 7, timeout_msecs: 4294967295)     ...
   449.575 ( 0.004 ms): Softwar~cThrea/32434 futex(uaddr: 0x7f39a18a9b70, op: WAKE|PRIVATE_FLAG, val: 1)           = 0

At some point we'll get that poll sys_exit event and will print a "[continued]" line.

While making the sizing of the alignment after the syscall arg list and
its result configurable, so that we can mimic strace, which uses a
smaller alingment by default, a bug was introduced where the closing
parens appeared before the syscall name and its arg list, fix it.

Fixes: 4b8a240ed5 ("perf trace: Add alignment spaces after the closing parens")
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-oi45i54s59h1w1kmgpzrfuum@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2019-01-07 16:24:27 -03:00
parent 64598e8b6f
commit 172bf02d56
1 changed files with 8 additions and 2 deletions
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10
tools/perf/builtin-trace.c
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@ -1758,6 +1758,7 @@ static int trace__printf_interrupted_entry(struct trace *trace)
{
struct thread_trace *ttrace;
size_t printed;
int len;
if (trace->failure_only || trace->current == NULL)
return 0;
@ -1768,9 +1769,14 @@ static int trace__printf_interrupted_entry(struct trace *trace)
return 0;
printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output);
printed += fprintf(trace->output, ")%-*s ...\n", trace->args_alignment, ttrace->entry_str);
ttrace->entry_pending = false;
printed += len = fprintf(trace->output, "%s)", ttrace->entry_str);
if (len < trace->args_alignment - 4)
printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " ");
printed += fprintf(trace->output, " ...\n");
ttrace->entry_pending = false;
++trace->nr_events_printed;
return printed;