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authorArnaldo Carvalho de Melo <acme@redhat.com>2013-08-26 11:36:30 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2013-08-26 17:25:52 -0300
commit04b34729e4584adfcb2e8ea908ff9478b1563001 (patch)
tree1078b2d9e7f673d1c689adf492e4a4bf94d536a8
parentda3c9a448af7ab2beab62cfff42bdea9590d9bea (diff)
downloadop-kernel-dev-04b34729e4584adfcb2e8ea908ff9478b1563001.zip
op-kernel-dev-04b34729e4584adfcb2e8ea908ff9478b1563001.tar.gz
perf trace: Allow printing syscall return values in hex
event_format->flags has a FIELD_IS_POINTER, but it is not set for the sys_exit 'ret' field in syscalls like mmap, so we need a way to ask for hex printing for pointer returns and keep things like 'read' returns printing in decimal. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-lfuveegw4od1t08n7bsmonrm@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rw-r--r--tools/perf/builtin-trace.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 9e23660..b2038fd 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -22,13 +22,18 @@ static struct syscall_fmt {
const char *alias;
bool errmsg;
bool timeout;
+ bool hexret;
} syscall_fmts[] = {
{ .name = "access", .errmsg = true, },
{ .name = "arch_prctl", .errmsg = true, .alias = "prctl", },
+ { .name = "brk", .hexret = true, },
+ { .name = "mmap", .hexret = true, },
{ .name = "connect", .errmsg = true, },
{ .name = "fstat", .errmsg = true, .alias = "newfstat", },
{ .name = "fstatat", .errmsg = true, .alias = "newfstatat", },
{ .name = "futex", .errmsg = true, },
+ { .name = "mmap", .hexret = true, },
+ { .name = "mremap", .hexret = true, },
{ .name = "open", .errmsg = true, },
{ .name = "poll", .errmsg = true, .timeout = true, },
{ .name = "ppoll", .errmsg = true, .timeout = true, },
@@ -475,6 +480,8 @@ signed_print:
fprintf(trace->output, ") = -1 %s %s", e, emsg);
} else if (ret == 0 && sc->fmt->timeout)
fprintf(trace->output, ") = 0 Timeout");
+ else if (sc->fmt->hexret)
+ fprintf(trace->output, ") = %#x", ret);
else
goto signed_print;
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