[igt-dev] [PATCH i-g-t 1/3] runner: Reinitialize compiled dmesg regexp each parsing session

[Arkadiusz Hiler]

Which regexp gets compiled is settings specific, depending whether we
run piglit-style or not.

If it's optimized to be initialized only once and it is a global
variable, it will be "stuck" in the mode we have selected with the first
run, which may break tests.

Let's remove this optimization and initialize it each time, as it takes
less 0.002s on my hardware.

Signed-off-by: Arkadiusz Hiler <arkadiusz.hiler at intel.com>
---
 runner/resultgen.c | 29 +++++++++++------------------
 1 file changed, 11 insertions(+), 18 deletions(-)

diff --git a/runner/resultgen.c b/runner/resultgen.c
index 32b59d59..73fda64f 100644
--- a/runner/resultgen.c
+++ b/runner/resultgen.c
@@ -499,27 +499,18 @@ static const char igt_dmesg_whitelist[] =
 static const char igt_piglit_style_dmesg_blacklist[] =
 	"(\\[drm:|drm_|intel_|i915_)";
 
-static regex_t re;
-
-static int init_regex_whitelist(struct settings *settings)
+static bool init_regex_whitelist(struct settings *settings, regex_t* re)
 {
-	static int status = -1;
+	const char *regex = settings->piglit_style_dmesg ?
+		igt_piglit_style_dmesg_blacklist :
+		igt_dmesg_whitelist;
 
-	if (status == -1) {
-		const char *regex = settings->piglit_style_dmesg ?
-			igt_piglit_style_dmesg_blacklist :
-			igt_dmesg_whitelist;
-
-		if (regcomp(&re, regex, REG_EXTENDED | REG_NOSUB) != 0) {
-			fprintf(stderr, "Cannot compile dmesg regexp\n");
-			status = 1;
-			return false;
-		}
-
-		status = 0;
+	if (regcomp(re, regex, REG_EXTENDED | REG_NOSUB) != 0) {
+		fprintf(stderr, "Cannot compile dmesg regexp\n");
+		return false;
 	}
 
-	return status;
+	return true;
 }
 
 static bool parse_dmesg_line(char* line,
@@ -639,12 +630,13 @@ static bool fill_from_dmesg(int fd,
 	char piglit_name[256];
 	ssize_t read;
 	size_t i;
+	regex_t re;
 
 	if (!f) {
 		return false;
 	}
 
-	if (init_regex_whitelist(settings)) {
+	if (!init_regex_whitelist(settings, &re)) {
 		fclose(f);
 		return false;
 	}
@@ -723,6 +715,7 @@ static bool fill_from_dmesg(int fd,
 
 	free(dmesg);
 	free(warnings);
+	regfree(&re);
 	fclose(f);
 	return true;
 }
-- 
2.20.1