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Add FieldTrialsRegistry that verifies looked up field trials

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This new class implements the existing FieldTrialsView interface,
extending it with the verification functionality. For now, the
verification will only be performed if the rtc_strict_field_trials GN
arg is set.

Most classes extending FieldTrialsView today have been converted to
extend from FieldTrialsRegistry instead to automatically perform
verification.

Bug: webrtc:14154
Change-Id: I4819724cd66a04507e62fcc2bb1019187b6ba8c7
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/276270
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Emil Lundmark <lndmrk@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#38453}
This commit is contained in:
Emil Lundmark
2022-09-21 15:20:22 +02:00
committed by WebRTC LUCI CQ
parent 9707f579ae
commit 1c8103d4db
20 changed files with 169 additions and 41 deletions
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9
api/field_trials.h
View File

@ -15,7 +15,7 @@
#include <string>
#include "absl/strings/string_view.h"
#include "api/field_trials_view.h"
#include "api/field_trials_registry.h"
#include "rtc_base/containers/flat_map.h"
namespace webrtc {
@ -34,7 +34,7 @@ namespace webrtc {
// NOTE: Creating multiple FieldTrials-object is currently prohibited
// until we remove the global string (TODO(bugs.webrtc.org/10335))
// (unless using CreateNoGlobal):
class FieldTrials : public FieldTrialsView {
class FieldTrials : public FieldTrialsRegistry {
public:
explicit FieldTrials(const std::string& s);
~FieldTrials();
@ -43,10 +43,11 @@ class FieldTrials : public FieldTrialsView {
// global variable (i.e can not be used for all parts of webrtc).
static std::unique_ptr<FieldTrials> CreateNoGlobal(const std::string& s);
std::string Lookup(absl::string_view key) const override;
private:
explicit FieldTrials(const std::string& s, bool);
std::string GetValue(absl::string_view key) const override;
const bool uses_global_;
const std::string field_trial_string_;
const char* const previous_field_trial_string_;