From 0ece30dc7c0e34b4c5911969b8fa99c33c6d023c Mon Sep 17 00:00:00 2001
From: George Hazan <ghazan@miranda.im>
Date: Wed, 30 Nov 2022 17:48:47 +0300
Subject: Telegram: update for TDLIB

---
 .../Telegram/tdlib/td/memprof/memprof_stat.cpp     | 166 +++++++++++++++++++++
 1 file changed, 166 insertions(+)
 create mode 100644 protocols/Telegram/tdlib/td/memprof/memprof_stat.cpp

(limited to 'protocols/Telegram/tdlib/td/memprof/memprof_stat.cpp')

diff --git a/protocols/Telegram/tdlib/td/memprof/memprof_stat.cpp b/protocols/Telegram/tdlib/td/memprof/memprof_stat.cpp
new file mode 100644
index 0000000000..00d371431e
--- /dev/null
+++ b/protocols/Telegram/tdlib/td/memprof/memprof_stat.cpp
@@ -0,0 +1,166 @@
+//
+// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2022
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+#include "memprof/memprof_stat.h"
+
+#include "td/utils/port/platform.h"
+
+#if (TD_DARWIN || TD_LINUX)
+#include <algorithm>
+#include <atomic>
+#include <cstddef>
+#include <cstdint>
+#include <cstdlib>
+#include <cstring>
+#include <new>
+#include <utility>
+#include <vector>
+
+#include <dlfcn.h>
+#include <execinfo.h>
+
+bool is_memprof_on() {
+  return true;
+}
+
+#define my_assert(f) \
+  if (!(f)) {        \
+    std::abort();    \
+  }
+
+struct malloc_info {
+  std::int32_t magic;
+  std::int32_t size;
+};
+
+static std::atomic<std::size_t> total_memory_used;
+
+void register_xalloc(malloc_info *info, std::int32_t diff) {
+  my_assert(info->size >= 0);
+  // TODO: this is very slow in case of several threads.
+  // Currently this statistics is intended only for memory benchmarks.
+  total_memory_used.fetch_add(diff * info->size, std::memory_order_relaxed);
+}
+
+std::size_t get_used_memory_size() {
+  return total_memory_used.load();
+}
+
+extern "C" {
+
+static constexpr std::size_t RESERVED_SIZE = 16;
+static constexpr std::int32_t MALLOC_INFO_MAGIC = 0x27138373;
+
+static void *do_malloc(std::size_t size) {
+  static_assert(RESERVED_SIZE % alignof(std::max_align_t) == 0, "fail");
+  static_assert(RESERVED_SIZE >= sizeof(malloc_info), "fail");
+#if TD_DARWIN
+  static void *malloc_void = dlsym(RTLD_NEXT, "malloc");
+  static auto malloc_old = *reinterpret_cast<decltype(malloc) **>(&malloc_void);
+#else
+  extern decltype(malloc) __libc_malloc;
+  static auto malloc_old = __libc_malloc;
+#endif
+  auto *info = static_cast<malloc_info *>(malloc_old(size + RESERVED_SIZE));
+  auto *buf = reinterpret_cast<char *>(info);
+
+  info->magic = MALLOC_INFO_MAGIC;
+  info->size = static_cast<std::int32_t>(size);
+
+  register_xalloc(info, +1);
+
+  void *data = buf + RESERVED_SIZE;
+
+  return data;
+}
+
+static malloc_info *get_info(void *data_void) {
+  auto *data = static_cast<char *>(data_void);
+  auto *buf = data - RESERVED_SIZE;
+
+  auto *info = reinterpret_cast<malloc_info *>(buf);
+  my_assert(info->magic == MALLOC_INFO_MAGIC);
+  return info;
+}
+
+void *malloc(std::size_t size) {
+  return do_malloc(size);
+}
+
+void free(void *data_void) {
+  if (data_void == nullptr) {
+    return;
+  }
+  auto *info = get_info(data_void);
+  register_xalloc(info, -1);
+
+#if TD_DARWIN
+  static void *free_void = dlsym(RTLD_NEXT, "free");
+  static auto free_old = *reinterpret_cast<decltype(free) **>(&free_void);
+#else
+  extern decltype(free) __libc_free;
+  static auto free_old = __libc_free;
+#endif
+  return free_old(info);
+}
+
+void *calloc(std::size_t size_a, std::size_t size_b) {
+  auto size = size_a * size_b;
+  void *res = do_malloc(size);
+  std::memset(res, 0, size);
+  return res;
+}
+
+void *realloc(void *ptr, std::size_t size) {
+  if (ptr == nullptr) {
+    return do_malloc(size);
+  }
+  auto *info = get_info(ptr);
+  auto *new_ptr = do_malloc(size);
+  auto to_copy = std::min(static_cast<std::int32_t>(size), info->size);
+  std::memcpy(new_ptr, ptr, to_copy);
+  free(ptr);
+  return new_ptr;
+}
+
+void *memalign(std::size_t alignment, std::size_t size) {
+  auto res = malloc(size);
+  my_assert(reinterpret_cast<std::uintptr_t>(res) % alignment == 0);
+  return res;
+}
+
+int posix_memalign(void **memptr, size_t alignment, size_t size) {
+  auto res = malloc(size);
+  my_assert(reinterpret_cast<std::uintptr_t>(res) % alignment == 0);
+  *memptr = res;
+  return 0;
+}
+}
+
+// c++14 guarantees that it is enough to override these two operators.
+void *operator new(std::size_t count) {
+  return do_malloc(count);
+}
+void operator delete(void *ptr) noexcept(true) {
+  free(ptr);
+}
+// because of gcc warning: the program should also define 'void operator delete(void*, std::size_t)'
+void operator delete(void *ptr, std::size_t) noexcept(true) {
+  free(ptr);
+}
+
+// c++17
+// void *operator new(std::size_t count, std::align_val_t al);
+// void operator delete(void *ptr, std::align_val_t al);
+
+#else
+bool is_memprof_on() {
+  return false;
+}
+std::size_t get_used_memory_size() {
+  return 0;
+}
+#endif
-- 
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