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📄 allocator_config.h(2.57 KB)
📄 atomic_helpers.h(4.16 KB)
📄 bytemap.h(992 B)
📄 checksum.cpp(2.52 KB)
📄 checksum.h(1.67 KB)
📄 chunk.h(5.83 KB)
📄 combined.h(40.99 KB)
📄 common.cpp(874 B)
📄 common.h(5.29 KB)
📄 crc32_hw.cpp(656 B)
📄 flags.cpp(2.09 KB)
📄 flags.h(975 B)
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📄 flags_parser.cpp(4.38 KB)
📄 flags_parser.h(1.23 KB)
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📄 fuchsia.h(695 B)
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📄 linux.cpp(6.1 KB)
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📄 list.h(4.95 KB)
📄 local_cache.h(5.21 KB)
📄 memtag.h(7.21 KB)
📄 mutex.h(1.69 KB)
📄 platform.h(2.03 KB)
📄 primary32.h(18.05 KB)
📄 primary64.h(17.3 KB)
📄 quarantine.h(9.64 KB)
📄 release.cpp(522 B)
📄 release.h(10.27 KB)
📄 report.cpp(6.62 KB)
📄 report.h(1.97 KB)
📄 secondary.h(13.22 KB)
📄 size_class_map.h(9.9 KB)
📄 stack_depot.h(4.47 KB)
📄 stats.h(2.77 KB)
📄 string_utils.cpp(7.93 KB)
📄 string_utils.h(1.05 KB)
📄 tsd.h(1.84 KB)
📄 tsd_exclusive.h(4.03 KB)
📄 tsd_shared.h(5.53 KB)
📄 vector.h(3.07 KB)
📄 wrappers_c.cpp(1.19 KB)
📄 wrappers_c.h(1.46 KB)
📄 wrappers_c.inc(8.6 KB)
📄 wrappers_c_bionic.cpp(2.23 KB)
📄 wrappers_c_checks.h(1.99 KB)
📄 wrappers_cpp.cpp(4.53 KB)

Editing: vector.h

//===-- vector.h ------------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef SCUDO_VECTOR_H_
#define SCUDO_VECTOR_H_

#include "common.h"

#include <string.h>

namespace scudo {

// A low-level vector based on map. May incur a significant memory overhead for
// small vectors. The current implementation supports only POD types.
template <typename T> class VectorNoCtor {
public:
  void init(uptr InitialCapacity) {
    CapacityBytes = 0;
    Size = 0;
    Data = nullptr;
    reserve(InitialCapacity);
  }
  void destroy() {
    if (Data)
      unmap(Data, CapacityBytes);
  }
  T &operator[](uptr I) {
    DCHECK_LT(I, Size);
    return Data[I];
  }
  const T &operator[](uptr I) const {
    DCHECK_LT(I, Size);
    return Data[I];
  }
  void push_back(const T &Element) {
    DCHECK_LE(Size, capacity());
    if (Size == capacity()) {
      const uptr NewCapacity = roundUpToPowerOfTwo(Size + 1);
      reallocate(NewCapacity);
    }
    memcpy(&Data[Size++], &Element, sizeof(T));
  }
  T &back() {
    DCHECK_GT(Size, 0);
    return Data[Size - 1];
  }
  void pop_back() {
    DCHECK_GT(Size, 0);
    Size--;
  }
  uptr size() const { return Size; }
  const T *data() const { return Data; }
  T *data() { return Data; }
  uptr capacity() const { return CapacityBytes / sizeof(T); }
  void reserve(uptr NewSize) {
    // Never downsize internal buffer.
    if (NewSize > capacity())
      reallocate(NewSize);
  }
  void resize(uptr NewSize) {
    if (NewSize > Size) {
      reserve(NewSize);
      memset(&Data[Size], 0, sizeof(T) * (NewSize - Size));
    }
    Size = NewSize;
  }

void clear() { Size = 0; }
  bool empty() const { return size() == 0; }

const T *begin() const { return data(); }
  T *begin() { return data(); }
  const T *end() const { return data() + size(); }
  T *end() { return data() + size(); }

private:
  void reallocate(uptr NewCapacity) {
    DCHECK_GT(NewCapacity, 0);
    DCHECK_LE(Size, NewCapacity);
    const uptr NewCapacityBytes =
        roundUpTo(NewCapacity * sizeof(T), getPageSizeCached());
    T *NewData =
        reinterpret_cast<T *>(map(nullptr, NewCapacityBytes, "scudo:vector"));
    if (Data) {
      memcpy(NewData, Data, Size * sizeof(T));
      unmap(Data, CapacityBytes);
    }
    Data = NewData;
    CapacityBytes = NewCapacityBytes;
  }

T *Data;
  uptr CapacityBytes;
  uptr Size;
};

template <typename T> class Vector : public VectorNoCtor<T> {
public:
  Vector() { VectorNoCtor<T>::init(1); }
  explicit Vector(uptr Count) {
    VectorNoCtor<T>::init(Count);
    this->resize(Count);
  }
  ~Vector() { VectorNoCtor<T>::destroy(); }
  // Disallow copies and moves.
  Vector(const Vector &) = delete;
  Vector &operator=(const Vector &) = delete;
  Vector(Vector &&) = delete;
  Vector &operator=(Vector &&) = delete;
};

} // namespace scudo

#endif // SCUDO_VECTOR_H_

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Editing: vector.h

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