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Reland "Introduce RTC_NO_UNIQUE_ADDRESS."

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This is a reland of f5e261aaf65cdf2eb903cdf40d651846be44f447

This CL disables RTC_NO_UNIQUE_ADDRESS on MSan builds since
there have been some issues.

Original change's description:
> Introduce RTC_NO_UNIQUE_ADDRESS.
>
> This macro introduces the possibility to suggest the compiler that a
> data member doesn't need an address different from other non static
> data members.
>
> The usage of a macro is to maintain portability since at the moment
> the attribute [[no_unique_address]] is only supported by clang
> with at least -std=c++11 but it should be supported by all the
> compilers starting from C++20.
>
> Bug: webrtc:11495
> Change-Id: I9f12b67b4422a2749649eaa6b004a67d5fd572d8
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/173331
> Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#32246}

Bug: webrtc:11495, webrtc:12218
Change-Id: I4e6c7cc37d3daffad2407c9a2acfa897fa5b426a
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/189968
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32668}
This commit is contained in:
Mirko Bonadei
2020-11-23 11:07:42 +01:00
committed by Commit Bot
parent cf1308fddd
commit 20e4c80fbe
52 changed files with 142 additions and 42 deletions
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1
logging/BUILD.gn
View File

@ -268,6 +268,7 @@ if (rtc_enable_protobuf) {
"../rtc_base:rtc_task_queue",
"../rtc_base:safe_minmax",
"../rtc_base/synchronization:sequence_checker",
"../rtc_base/system:no_unique_address",
]
absl_deps = [ "//third_party/abseil-cpp/absl/types:optional" ]
}

3
logging/rtc_event_log/rtc_event_log_impl.h
View File

@ -24,6 +24,7 @@
#include "api/task_queue/task_queue_factory.h"
#include "logging/rtc_event_log/encoder/rtc_event_log_encoder.h"
#include "rtc_base/synchronization/sequence_checker.h"
#include "rtc_base/system/no_unique_address.h"
#include "rtc_base/task_queue.h"
#include "rtc_base/thread_annotations.h"
@ -78,7 +79,7 @@ class RtcEventLogImpl final : public RtcEventLog {
int64_t last_output_ms_ RTC_GUARDED_BY(*task_queue_);
bool output_scheduled_ RTC_GUARDED_BY(*task_queue_);
SequenceChecker logging_state_checker_;
RTC_NO_UNIQUE_ADDRESS SequenceChecker logging_state_checker_;
bool logging_state_started_ RTC_GUARDED_BY(logging_state_checker_);
// Since we are posting tasks bound to |this|, it is critical that the event