Enable storing last-dispatched exception per-thread.

base/debug/activity_tracker_unittest.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/debug/activity_tracker.h"
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/files/file.h"
@@ skipping 232 matching lines @@
     ASSERT_EQ(1U, snapshot.activity_stack.size());
     EXPECT_EQ(Activity::ACT_TASK, snapshot.activity_stack[0].activity_type);
   }
 
   ASSERT_TRUE(tracker->CreateSnapshot(&snapshot));
   ASSERT_EQ(0U, snapshot.activity_stack_depth);
   ASSERT_EQ(0U, snapshot.activity_stack.size());
   ASSERT_EQ(2U, GetGlobalUserDataMemoryCacheUsed());
 }
 
+TEST_F(ActivityTrackerTest, ExceptionTest) {
+  GlobalActivityTracker::CreateWithLocalMemory(kMemorySize, 0, "", 3);
+  GlobalActivityTracker* global = GlobalActivityTracker::Get();
+
+  ThreadActivityTracker* tracker =
+      GlobalActivityTracker::Get()->GetOrCreateTrackerForCurrentThread();
+  ThreadActivityTracker::Snapshot snapshot;
+  ASSERT_EQ(0U, GetGlobalUserDataMemoryCacheUsed());
+
+  ASSERT_TRUE(tracker->CreateSnapshot(&snapshot));
+  ASSERT_EQ(0U, snapshot.last_exception.activity_type);
+
+  char origin;
+  global->RecordException(&origin, 42);
+
+  ASSERT_TRUE(tracker->CreateSnapshot(&snapshot));
+  EXPECT_EQ(Activity::ACT_EXCEPTION, snapshot.last_exception.activity_type);
+  EXPECT_EQ(reinterpret_cast<uintptr_t>(&origin),
+            snapshot.last_exception.origin_address);
+  EXPECT_EQ(42U, snapshot.last_exception.data.exception.code);
+}
+
 TEST_F(ActivityTrackerTest, CreateWithFileTest) {
   const char temp_name[] = "CreateWithFileTest";
   ScopedTempDir temp_dir;
   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
   FilePath temp_file = temp_dir.GetPath().AppendASCII(temp_name);
   const size_t temp_size = 64 << 10;  // 64 KiB
 
   // Create a global tracker on a new file.
   ASSERT_FALSE(PathExists(temp_file));
   GlobalActivityTracker::CreateWithFile(temp_file, temp_size, 0, "foo", 3);
@@ skipping 208 matching lines @@
   global->allocator()->ChangeType(
       tracker_ref, GlobalActivityTracker::kTypeIdActivityTracker,
       GlobalActivityTracker::kTypeIdActivityTrackerFree, false);
   global->allocator()->ChangeType(
       user_data_ref, GlobalActivityTracker::kTypeIdUserDataRecord,
       GlobalActivityTracker::kTypeIdUserDataRecordFree, false);
 }
 
 }  // namespace debug
 }  // namespace base