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[Stats] Handle the case of missing certificates.

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Certificates being missing is a sign of a bug (e.g. webrtc:14844, to be
fixed separately) which is why we have a DCHECK. But this DCHECK does
not protect against accessing the invalid iterator if it is a release
build. This CL makes that safe.

Bug: chromium:1408392
Change-Id: I97a82786028e41c58ef8ef15002c3f959bbec7f1
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/291109
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Henrik Boström <hbos@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#39159}
This commit is contained in:
Henrik Boström 2023-01-20 10:48:31 +01:00 committed by WebRTC LUCI CQ
parent bf27f35a04
commit 124d7c3fe5
1 changed files with 10 additions and 9 deletions
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19
pc/rtc_stats_collector.cc
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@ -2209,16 +2209,17 @@ void RTCStatsCollector::ProduceTransportStats_n(
// exist.
const auto& certificate_stats_it =
transport_cert_stats.find(transport_name);
std::string local_certificate_id, remote_certificate_id;
RTC_DCHECK(certificate_stats_it != transport_cert_stats.cend());
std::string local_certificate_id;
if (certificate_stats_it->second.local) {
local_certificate_id = RTCCertificateIDFromFingerprint(
certificate_stats_it->second.local->fingerprint);
}
std::string remote_certificate_id;
if (certificate_stats_it->second.remote) {
remote_certificate_id = RTCCertificateIDFromFingerprint(
certificate_stats_it->second.remote->fingerprint);
if (certificate_stats_it != transport_cert_stats.cend()) {
if (certificate_stats_it->second.local) {
local_certificate_id = RTCCertificateIDFromFingerprint(
certificate_stats_it->second.local->fingerprint);
}
if (certificate_stats_it->second.remote) {
remote_certificate_id = RTCCertificateIDFromFingerprint(
certificate_stats_it->second.remote->fingerprint);
}
}
// There is one transport stats for each channel.