Rewrite stack map statistics printing in outdump.
The code was repetitive and had a tendency to get out of sync.
Test: Check the output of oatdump
Change-Id: Ied68a6c9add7ac234ede68d4adbc097bb8b82d6f
diff --git a/libartbase/base/stats.h b/libartbase/base/stats.h
new file mode 100644
index 0000000..4dcbfe8
--- /dev/null
+++ b/libartbase/base/stats.h
@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2018 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.
+ */
+
+#ifndef ART_LIBARTBASE_BASE_STATS_H_
+#define ART_LIBARTBASE_BASE_STATS_H_
+
+#include <unordered_map>
+
+#include "globals.h"
+
+namespace art {
+
+// Simple structure to record tree of statistical values.
+class Stats {
+ public:
+ double Value() const { return value_; }
+ size_t Count() const { return count_; }
+ Stats* Child(const char* name) { return &children_[name]; }
+ const std::unordered_map<const char*, Stats>& Children() const { return children_; }
+
+ void AddBytes(double bytes, size_t count = 1) { Add(bytes, count); }
+ void AddBits(double bits, size_t count = 1) { Add(bits / kBitsPerByte, count); }
+ void AddSeconds(double s, size_t count = 1) { Add(s, count); }
+ void AddNanoSeconds(double ns, size_t count = 1) { Add(ns / 1000000000.0, count); }
+
+ double SumChildrenValues() const {
+ double sum = 0.0;
+ for (auto it : children_) {
+ sum += it.second.Value();
+ }
+ return sum;
+ }
+
+ private:
+ void Add(double value, size_t count = 1) {
+ value_ += value;
+ count_ += count;
+ }
+
+ double value_ = 0.0; // Commutative sum of the collected statistic in basic units.
+ size_t count_ = 0; // The number of samples for this node.
+ std::unordered_map<const char*, Stats> children_;
+};
+
+} // namespace art
+
+#endif // ART_LIBARTBASE_BASE_STATS_H_