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authorRobert Richter <robert.richter@amd.com>2011-12-07 10:02:54 +0100
committerArnaldo Carvalho de Melo <acme@redhat.com>2011-12-23 17:01:03 -0200
commitefad14150a0b4429f37da7245001a8096ef7ee38 (patch)
tree61c41a83384266dca00a2a4c88f43ebf4bdf5b5e /tools/perf/builtin-report.c
parent1b5495043d5bc058def21f9b66fd8feaa794eb44 (diff)
downloadblackbird-op-linux-efad14150a0b4429f37da7245001a8096ef7ee38.tar.gz
blackbird-op-linux-efad14150a0b4429f37da7245001a8096ef7ee38.zip
perf report: Accept fifos as input file
The default input file for perf report is not handled the same way as perf record does it for its output file. This leads to unexpected behavior of perf report, etc. E.g.: # perf record -a -e cpu-cycles sleep 2 | perf report | cat failed to open perf.data: No such file or directory (try 'perf record' first) While perf record writes to a fifo, perf report expects perf.data to be read. This patch changes this to accept fifos as input file. Applies to the following commands: perf annotate perf buildid-list perf evlist perf kmem perf lock perf report perf sched perf script perf timechart Also fixes char const* -> const char* type declaration for filename strings. v2: * Prevent potential null pointer access to input_name in builtin-report.c. Needed due to removal of patch "perf report: Setup browser if stdout is a pipe" Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1323248577-11268-5-git-send-email-robert.richter@amd.com Signed-off-by: Robert Richter <robert.richter@amd.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-report.c')
-rw-r--r--tools/perf/builtin-report.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 9051f6bfaa7e..25d34d483e49 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -321,8 +321,7 @@ static int __cmd_report(struct perf_report *rep)
}
if (nr_samples == 0) {
- ui__warning("The %s file has no samples!\n",
- rep->input_name);
+ ui__warning("The %s file has no samples!\n", session->filename);
goto out_delete;
}
@@ -430,6 +429,7 @@ setup:
int cmd_report(int argc, const char **argv, const char *prefix __used)
{
+ struct stat st;
char callchain_default_opt[] = "fractal,0.5,callee";
const char * const report_usage[] = {
"perf report [<options>]",
@@ -451,7 +451,6 @@ int cmd_report(int argc, const char **argv, const char *prefix __used)
.ordered_samples = true,
.ordering_requires_timestamps = true,
},
- .input_name = "perf.data",
.pretty_printing_style = "normal",
};
const struct option options[] = {
@@ -531,10 +530,18 @@ int cmd_report(int argc, const char **argv, const char *prefix __used)
if (report.inverted_callchain)
callchain_param.order = ORDER_CALLER;
+ if (!report.input_name || !strlen(report.input_name)) {
+ if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
+ report.input_name = "-";
+ else
+ report.input_name = "perf.data";
+ }
+
if (strcmp(report.input_name, "-") != 0)
setup_browser(true);
else
use_browser = 0;
+
/*
* Only in the newt browser we are doing integrated annotation,
* so don't allocate extra space that won't be used in the stdio
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