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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /widget/android/ANRReporter.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'widget/android/ANRReporter.cpp')
-rw-r--r--widget/android/ANRReporter.cpp89
1 files changed, 89 insertions, 0 deletions
diff --git a/widget/android/ANRReporter.cpp b/widget/android/ANRReporter.cpp
new file mode 100644
index 000000000..30d9b3d76
--- /dev/null
+++ b/widget/android/ANRReporter.cpp
@@ -0,0 +1,89 @@
+/* -*- Mode: c++; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "ANRReporter.h"
+#include "GeckoProfiler.h"
+
+#include <unistd.h>
+
+namespace mozilla {
+
+bool
+ANRReporter::RequestNativeStack(bool aUnwind)
+{
+ if (profiler_is_active()) {
+ // Don't proceed if profiler is already running
+ return false;
+ }
+ // WARNING: we are on the ANR reporter thread at this point and it is
+ // generally unsafe to use the profiler from off the main thread. However,
+ // the risk here is limited because for most users, the profiler is not run
+ // elsewhere. See the discussion in Bug 863777, comment 13
+ const char *NATIVE_STACK_FEATURES[] =
+ {"leaf", "threads", "privacy"};
+ const char *NATIVE_STACK_UNWIND_FEATURES[] =
+ {"leaf", "threads", "privacy", "stackwalk"};
+
+ const char **features = NATIVE_STACK_FEATURES;
+ size_t features_size = sizeof(NATIVE_STACK_FEATURES);
+ if (aUnwind) {
+ features = NATIVE_STACK_UNWIND_FEATURES;
+ features_size = sizeof(NATIVE_STACK_UNWIND_FEATURES);
+ // We want the new unwinder if the unwind mode has not been set yet
+ putenv("MOZ_PROFILER_NEW=1");
+ }
+
+ const char *NATIVE_STACK_THREADS[] =
+ {"GeckoMain", "Compositor"};
+ // Buffer one sample and let the profiler wait a long time
+ profiler_start(100, 10000, features, features_size / sizeof(char*),
+ NATIVE_STACK_THREADS, sizeof(NATIVE_STACK_THREADS) / sizeof(char*));
+ return true;
+}
+
+jni::String::LocalRef
+ANRReporter::GetNativeStack()
+{
+ if (!profiler_is_active()) {
+ // Maybe profiler support is disabled?
+ return nullptr;
+ }
+
+ // Timeout if we don't get a profiler sample after 5 seconds.
+ const PRIntervalTime timeout = PR_SecondsToInterval(5);
+ const PRIntervalTime startTime = PR_IntervalNow();
+
+ // Pointer to a profile JSON string
+ typedef mozilla::UniquePtr<char[]> ProfilePtr;
+
+ ProfilePtr profile(profiler_get_profile());
+
+ while (profile && !strstr(profile.get(), "\"samples\":[{")) {
+ // no sample yet?
+ if (PR_IntervalNow() - startTime >= timeout) {
+ return nullptr;
+ }
+ usleep(100000ul); // Sleep for 100ms
+ profile = ProfilePtr(profiler_get_profile());
+ }
+
+ if (profile) {
+ return jni::String::Param(profile.get());
+ }
+ return nullptr;
+}
+
+void
+ANRReporter::ReleaseNativeStack()
+{
+ if (!profiler_is_active()) {
+ // Maybe profiler support is disabled?
+ return;
+ }
+ profiler_stop();
+}
+
+} // namespace
+