One of the side-effects we test for are kernel oops and knowing the
guilty subtest can help speed up debugging. We can write to /dev/kmsg to
inject messages into dmesg, so let's do so before the start of every
test.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
---
lib/igt_core.c | 29 ++++++++++++++++++++++++-----
1 file changed, 24 insertions(+), 5 deletions(-)
diff --git a/lib/igt_core.c b/lib/igt_core.c
index b0800e8..deaf145 100644
--- a/lib/igt_core.c
+++ b/lib/igt_core.c
@@ -269,8 +269,9 @@ static void print_version(void)
uts.sysname, uts.release, uts.machine);
}
-static void print_usage(const char *command_str, const char *help_str,
- bool output_on_stderr)
+static const char *command_str;
+
+static void print_usage(const char *help_str, bool output_on_stderr)
{
FILE *f = output_on_stderr ? stderr : stdout;
@@ -306,7 +307,6 @@ static int common_init(int argc, char **argv,
{"debug", 0, 0, 'd'},
{"help", 0, 0, 'h'},
};
- const char *command_str;
char *short_opts;
struct option *combined_opts;
int extra_opt_count;
@@ -364,11 +364,11 @@ static int common_init(int argc, char **argv,
run_single_subtest = strdup(optarg);
break;
case 'h':
- print_usage(command_str, help_str, false);
+ print_usage(help_str, false);
ret = -1;
goto out;
case '?':
- print_usage(command_str, help_str, true);
+ print_usage(help_str, true);
ret = -2;
goto out;
default:
@@ -498,6 +498,23 @@ void igt_simple_init_parse_opts(int argc, char **argv,
extra_opt_handler);
}
+__attribute__((format(printf, 2, 3)))
+static void echo(const char *path, const char *format, ...)
+{
+ va_list ap;
+ FILE *file;
+
+ file = fopen(path, "w");
+ if (file == NULL)
+ return;
+
+ va_start(ap, format);
+ vfprintf(file, format, ap);
+ va_end(ap);
+
+ fclose(file);
+}
+
/*
* Note: Testcases which use these helpers MUST NOT output anything to stdout
* outside of places protected by igt_run_subtest checks - the piglit
@@ -529,6 +546,8 @@ bool __igt_run_subtest(const char *subtest_name)
return false;
}
+ echo("/dev/kmsg", "%s: starting subtest %s\n", command_str,
subtest_name);
+
return (in_subtest = subtest_name);
}
--
1.9.1
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