Let threads opt in to having their stack traces printed
The video decoder thread is the pilot user.
For now this is an Android-only feature, since that's the only
platform we can print stack traces on.
Bug: webrtc:9987
Change-Id: Ie638c619673b5f159d91a32683fd787baf46479a
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/126222
Reviewed-by: Magnus Jedvert <magjed@webrtc.org>
Commit-Queue: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27127}diff --git a/rtc_base/system/thread_registry.h b/rtc_base/system/thread_registry.h
new file mode 100644
index 0000000..0e3187b
--- /dev/null
+++ b/rtc_base/system/thread_registry.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright 2019 The WebRTC Project Authors. All rights reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef RTC_BASE_SYSTEM_THREAD_REGISTRY_H_
+#define RTC_BASE_SYSTEM_THREAD_REGISTRY_H_
+
+#include "rtc_base/location.h"
+
+namespace webrtc {
+
+class ScopedRegisterThreadForDebugging {
+ public:
+#if defined(WEBRTC_ANDROID) && !defined(WEBRTC_CHROMIUM_BUILD)
+ explicit ScopedRegisterThreadForDebugging(rtc::Location location);
+ ~ScopedRegisterThreadForDebugging();
+#else
+ explicit ScopedRegisterThreadForDebugging(rtc::Location) {}
+#endif
+
+ // Not movable or copyable, because we can't duplicate the resource it owns,
+ // and it needs a constant address.
+ ScopedRegisterThreadForDebugging(const ScopedRegisterThreadForDebugging&) =
+ delete;
+ ScopedRegisterThreadForDebugging(ScopedRegisterThreadForDebugging&&) = delete;
+ ScopedRegisterThreadForDebugging& operator=(
+ const ScopedRegisterThreadForDebugging&) = delete;
+ ScopedRegisterThreadForDebugging& operator=(
+ ScopedRegisterThreadForDebugging&&) = delete;
+};
+
+#if defined(WEBRTC_ANDROID) && !defined(WEBRTC_CHROMIUM_BUILD)
+void PrintStackTracesOfRegisteredThreads();
+#else
+inline void PrintStackTracesOfRegisteredThreads() {}
+#endif
+
+} // namespace webrtc
+
+#endif // RTC_BASE_SYSTEM_THREAD_REGISTRY_H_