Prevent NaN and Inf values in webrtc_perf_test

That is, cause a fatal error when a test produces such a result.

Bug: webrtc:9767
Change-Id: I588a34aa1e7e34b3036d5661e894676b21072862
Reviewed-on: https://webrtc-review.googlesource.com/c/101320
Commit-Queue: Oleh Prypin <oprypin@webrtc.org>
Reviewed-by: Yves Gerey <yvesg@webrtc.org>
Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24950}

test/BUILD.gn

@@ -127,6 +127,7 @@ rtc_source_set("perf_test") {
   deps = [
     "..:webrtc_common",
     "../api:array_view",
+    "../rtc_base:checks",
     "../rtc_base:rtc_base_approved",
   ]
 }

test/testsupport/perf_test.cc

@@ -9,9 +9,11 @@
  */
 
 #include "test/testsupport/perf_test.h"
+#include "rtc_base/checks.h"
 #include "rtc_base/criticalsection.h"
 
 #include <stdio.h>
+#include <cmath>
 #include <fstream>
 #include <map>
 #include <sstream>
@@ -44,6 +46,8 @@ class PerfResultsLogger {
                  const double value,
                  const std::string& units,
                  const bool important) {
+    RTC_CHECK(std::isfinite(value));
+
     std::ostringstream value_stream;
     value_stream.precision(8);
     value_stream << value;
@@ -64,6 +68,9 @@ class PerfResultsLogger {
                              const double error,
                              const std::string& units,
                              const bool important) {
+    RTC_CHECK(std::isfinite(mean));
+    RTC_CHECK(std::isfinite(error));
+
     std::ostringstream value_stream;
     value_stream.precision(8);
     value_stream << '{' << mean << ',' << error << '}';
@@ -84,6 +91,10 @@ class PerfResultsLogger {
                      const rtc::ArrayView<const double> values,
                      const std::string& units,
                      const bool important) {
+    for (double v : values) {
+      RTC_CHECK(std::isfinite(v));
+    }
+
     std::ostringstream value_stream;
     value_stream.precision(8);
     value_stream << '[';

test/testsupport/perf_test_unittest.cc

@@ -10,6 +10,7 @@
 
 #include "test/testsupport/perf_test.h"
 
+#include <limits>
 #include <string>
 
 #include "test/gtest.h"
@@ -104,5 +105,25 @@ TEST_F(PerfTest, TestClearPerfResults) {
   EXPECT_EQ(R"({"format_version":"1.0","charts":{}})", GetPerfResultsJSON());
 }
 
+#if GTEST_HAS_DEATH_TEST
+using PerfDeathTest = PerfTest;
+
+TEST_F(PerfDeathTest, TestFiniteResultError) {
+  const double kNan = std::numeric_limits<double>::quiet_NaN();
+  const double kInf = std::numeric_limits<double>::infinity();
+
+  EXPECT_DEATH(PrintResult("a", "b", "c", kNan, "d", false), "finit");
+  EXPECT_DEATH(PrintResult("a", "b", "c", kInf, "d", false), "finit");
+
+  EXPECT_DEATH(PrintResultMeanAndError("a", "b", "c", kNan, 1, "d", false), "");
+  EXPECT_DEATH(PrintResultMeanAndError("a", "b", "c", 1, kInf, "d", false), "");
+
+  const double kNanList[] = {kNan, kNan};
+  EXPECT_DEATH(PrintResultList("a", "b", "c", kNanList, "d", false), "");
+  const double kInfList[] = {0, kInf};
+  EXPECT_DEATH(PrintResultList("a", "b", "c", kInfList, "d", false), "");
+}
+#endif
+
 }  // namespace test
 }  // namespace webrtc