DO NOT MERGE: Merge Oreo MR1 into master

Exempt-From-Owner-Approval: Changes already landed internally
Change-Id: I727a014df2fb05a4b13cb67b1fcb760a8b387523

1 files changed, 78 insertions, 0 deletions

diff --git a/libs/hwui/ProfileDataContainer.cpp b/libs/hwui/ProfileDataContainer.cpp
new file mode 100644
index 000000000000..cbf3eb390f53
--- /dev/null
+++ b/libs/hwui/ProfileDataContainer.cpp
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "ProfileDataContainer.h"
+
+#include <log/log.h>
+#include <cutils/ashmem.h>
+
+#include <sys/mman.h>
+
+namespace android {
+namespace uirenderer {
+
+void ProfileDataContainer::freeData() {
+    if (mIsMapped) {
+        munmap(mData, sizeof(ProfileData));
+    } else {
+        delete mData;
+    }
+    mIsMapped = false;
+    mData = nullptr;
+}
+
+void ProfileDataContainer::rotateStorage() {
+    // If we are mapped we want to stop using the ashmem backend and switch to malloc
+    // We are expecting a switchStorageToAshmem call to follow this, but it's not guaranteed
+    // If we aren't sitting on top of ashmem then just do a reset() as it's functionally
+    // equivalent do a free, malloc, reset.
+    if (mIsMapped) {
+        freeData();
+        mData = new ProfileData;
+    }
+    mData->reset();
+}
+
+void ProfileDataContainer::switchStorageToAshmem(int ashmemfd) {
+    int regionSize = ashmem_get_size_region(ashmemfd);
+    if (regionSize < 0) {
+        int err = errno;
+        ALOGW("Failed to get ashmem region size from fd %d, err %d %s", ashmemfd, err, strerror(err));
+        return;
+    }
+    if (regionSize < static_cast<int>(sizeof(ProfileData))) {
+        ALOGW("Ashmem region is too small! Received %d, required %u",
+                regionSize, static_cast<unsigned int>(sizeof(ProfileData)));
+        return;
+    }
+    ProfileData* newData = reinterpret_cast<ProfileData*>(
+            mmap(NULL, sizeof(ProfileData), PROT_READ | PROT_WRITE,
+                    MAP_SHARED, ashmemfd, 0));
+    if (newData == MAP_FAILED) {
+        int err = errno;
+        ALOGW("Failed to move profile data to ashmem fd %d, error = %d",
+                ashmemfd, err);
+        return;
+    }
+
+    newData->mergeWith(*mData);
+    freeData();
+    mData = newData;
+    mIsMapped = true;
+}
+
+} /* namespace uirenderer */
+} /* namespace android */
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