提交 3f056b66 编写于 作者: A Andi Kleen 提交者: Arnaldo Carvalho de Melo

perf jevents: Make build fail on JSON parse error

Today, when a JSON file fails parsing the build continues, but there are
no json files built in, which is difficult to debug later.  Make the
build stop on a parse error instead.

v2: Add fixes from Sukadev. Now we handle architectures
    with no JSON events correctly. And fix some stale comments.

Committer note:

Tested by running the cross build container tests, that were all failing
for v1.
Signed-off-by: NAndi Kleen <ak@linux.intel.com>
Acked-by: NJiri Olsa <jolsa@kernel.org>
Tested-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/20170725001638.19990-1-andi@firstfloor.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
上级 a1a8bed3
......@@ -85,10 +85,6 @@ users to specify events by their name:
where 'pm_1plus_ppc_cmpl' is a Power8 PMU event.
In case of errors when processing files in the tools/perf/pmu-events/arch
directory, 'jevents' tries to create an empty mapping file to allow the perf
build to succeed even if the PMU event aliases cannot be used.
However some errors in processing may cause the perf build to fail.
Mapfile format
......
......@@ -822,10 +822,6 @@ static int process_one_file(const char *fpath, const struct stat *sb,
* PMU event tables (see struct pmu_events_map).
*
* Write out the PMU events tables and the mapping table to pmu-event.c.
*
* If unable to process the JSON or arch files, create an empty mapping
* table so we can continue to build/use perf even if we cannot use the
* PMU event aliases.
*/
int main(int argc, char *argv[])
{
......@@ -836,6 +832,7 @@ int main(int argc, char *argv[])
const char *arch;
const char *output_file;
const char *start_dirname;
struct stat stbuf;
prog = basename(argv[0]);
if (argc < 4) {
......@@ -857,11 +854,17 @@ int main(int argc, char *argv[])
return 2;
}
sprintf(ldirname, "%s/%s", start_dirname, arch);
/* If architecture does not have any event lists, bail out */
if (stat(ldirname, &stbuf) < 0) {
pr_info("%s: Arch %s has no PMU event lists\n", prog, arch);
goto empty_map;
}
/* Include pmu-events.h first */
fprintf(eventsfp, "#include \"../../pmu-events/pmu-events.h\"\n");
sprintf(ldirname, "%s/%s", start_dirname, arch);
/*
* The mapfile allows multiple CPUids to point to the same JSON file,
* so, not sure if there is a need for symlinks within the pmu-events
......@@ -878,6 +881,9 @@ int main(int argc, char *argv[])
if (rc && verbose) {
pr_info("%s: Error walking file tree %s\n", prog, ldirname);
goto empty_map;
} else if (rc < 0) {
/* Make build fail */
return 1;
} else if (rc) {
goto empty_map;
}
......@@ -892,7 +898,8 @@ int main(int argc, char *argv[])
if (process_mapfile(eventsfp, mapfile)) {
pr_info("%s: Error processing mapfile %s\n", prog, mapfile);
goto empty_map;
/* Make build fail */
return 1;
}
return 0;
......
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