1 //===--- MemoryTree.h - A special tree for components and sizes -----------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "support/MemoryTree.h"
10 #include "Trace.h"
11 #include "llvm/ADT/StringRef.h"
12 #include <cstddef>
13 
14 namespace clang {
15 namespace clangd {
16 
17 namespace {
18 
19 size_t traverseTree(const MemoryTree &MT, std::string &ComponentName,
20                     const trace::Metric &Out) {
21   size_t OriginalLen = ComponentName.size();
22   if (!ComponentName.empty())
23     ComponentName += '.';
24   size_t Total = MT.self();
25   for (const auto &Entry : MT.children()) {
26     ComponentName += Entry.first;
27     Total += traverseTree(Entry.getSecond(), ComponentName, Out);
28     ComponentName.resize(OriginalLen + 1);
29   }
30   ComponentName.resize(OriginalLen);
31   Out.record(Total, ComponentName);
32   return Total;
33 }
34 } // namespace
35 
36 MemoryTree &MemoryTree::createChild(llvm::StringRef Name) {
37   auto &Child = Children.try_emplace(Name, DetailAlloc).first->getSecond();
38   return Child;
39 }
40 
41 const llvm::DenseMap<llvm::StringRef, MemoryTree> &
42 MemoryTree::children() const {
43   return Children;
44 }
45 
46 size_t MemoryTree::total() const {
47   size_t Total = Size;
48   for (const auto &Entry : Children)
49     Total += Entry.getSecond().total();
50   return Total;
51 }
52 
53 void record(const MemoryTree &MT, std::string RootName,
54             const trace::Metric &Out) {
55   traverseTree(MT, RootName, Out);
56 }
57 } // namespace clangd
58 } // namespace clang
59