- Proper shutdown sequence, uv_close() must be called from the event loop thread - Moved start_listening() to child class constructor because it must be ready before it can listen on sockets - Added simple memory leak detector for Windows. Linux users can enjoy the leak sanitizerpull/5/head
SChernykh
3 years ago
parent
27e85a922b
commit
3f1ee9ce4b
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/*
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* This file is part of the Monero P2Pool <https://github.com/SChernykh/p2pool>
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* Copyright (c) 2021 SChernykh <https://github.com/SChernykh>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 3.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "common.h"
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// Simple memory leak detector for Windows users, works best in RelWithDebInfo configuration.
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#if defined(_WIN32) && 0
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#include "uv_util.h"
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#include <atomic>
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#include <type_traits>
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#include "dbghelp.h"
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#pragma comment(lib, "Dbghelp.lib")
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namespace p2pool {
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static bool track_memory = false;
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constexpr size_t N = 1048576;
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constexpr size_t MAX_FRAMES = 30;
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struct TrackedAllocation
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{
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void* p;
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void* stack_trace[MAX_FRAMES];
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uint32_t thread_id;
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uint32_t allocated_size;
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};
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static_assert(sizeof(TrackedAllocation) == 256, "");
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uv_mutex_t allocation_lock;
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std::hash<void*> hasher;
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uint32_t first[N];
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uint32_t next[N];
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TrackedAllocation allocations[N];
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uint32_t num_allocations = 0;
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uint32_t cur_allocation_index = 1;
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FORCEINLINE static void add_alocation(void* p, size_t size)
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{
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if (!track_memory) {
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return;
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}
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void* stack_trace[MAX_FRAMES];
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DWORD hash;
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CaptureStackBackTrace(1, MAX_FRAMES, stack_trace, &hash);
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const DWORD thread_id = GetCurrentThreadId();
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const size_t index = hasher(p) & (N - 1);
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p2pool::MutexLock lock(allocation_lock);
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++num_allocations;
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if (num_allocations >= N / 2) {
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// Make N two times bigger if this triggers
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__debugbreak();
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}
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for (uint64_t i = cur_allocation_index;; i = (i + 1) & (N - 1)) {
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if (i && !allocations[i].allocated_size) {
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cur_allocation_index = static_cast<uint32_t>(i);
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allocations[i].allocated_size = static_cast<uint32_t>(size);
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break;
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}
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}
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TrackedAllocation& t = allocations[cur_allocation_index];
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t.p = p;
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memcpy(t.stack_trace, stack_trace, sizeof(stack_trace));
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next[cur_allocation_index] = first[index];
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t.thread_id = thread_id;
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first[index] = cur_allocation_index;
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}
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FORCEINLINE static void remove_allocation(void* p)
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{
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if (!track_memory || !p) {
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return;
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}
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p2pool::MutexLock lock(allocation_lock);
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--num_allocations;
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const size_t index = hasher(p) & (N - 1);
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bool found = false;
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for (uint32_t prev = 0, k = first[index]; k != 0; prev = k, k = next[k]) {
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if (allocations[k].p == p) {
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found = true;
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allocations[k].allocated_size = 0;
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if (prev) {
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next[prev] = next[k];
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}
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else {
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first[index] = next[k];
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}
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return;
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}
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}
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if (!found) {
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// Someone tried to deallocate a pointer that wasn't allocated before
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__debugbreak();
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}
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}
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FORCEINLINE static void* allocate(size_t n)
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{
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void* p = malloc(n + sizeof(TrackedAllocation));
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if (!p) {
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throw std::bad_alloc();
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}
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add_alocation(p, n);
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return p;
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}
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FORCEINLINE static void deallocate(void* p)
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{
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remove_allocation(p);
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free(p);
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}
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} // p2pool
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void memory_tracking_start()
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{
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using namespace p2pool;
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uv_mutex_init_checked(&allocation_lock);
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track_memory = true;
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}
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void memory_tracking_stop()
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{
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using namespace p2pool;
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track_memory = false;
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uv_mutex_destroy(&allocation_lock);
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const HANDLE h = GetCurrentProcess();
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SymInitialize(h, NULL, TRUE);
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uint64_t total_leaks = 0;
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for (uint32_t i = 0; i < N; ++i) {
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if (allocations[i].allocated_size) {
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total_leaks += allocations[i].allocated_size;
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char buffer[sizeof(SYMBOL_INFO) + MAX_SYM_NAME * sizeof(TCHAR)] = {};
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PSYMBOL_INFO pSymbol = reinterpret_cast<PSYMBOL_INFO>(buffer);
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pSymbol->SizeOfStruct = sizeof(SYMBOL_INFO);
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pSymbol->MaxNameLen = MAX_SYM_NAME;
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IMAGEHLP_LINE64 line{};
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line.SizeOfStruct = sizeof(IMAGEHLP_LINE64);
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printf("Memory leak detected, %u bytes allocated by thread %u at:\n", allocations[i].allocated_size, allocations[i].thread_id);
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for (size_t j = 0; j < MAX_FRAMES; ++j) {
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const DWORD64 address = reinterpret_cast<DWORD64>(allocations[i].stack_trace[j]);
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DWORD64 t1 = 0;
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DWORD t2 = 0;
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if (SymFromAddr(h, address, &t1, pSymbol) && SymGetLineFromAddr64(h, address, &t2, &line)) {
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const char* s = line.FileName;
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const char* file_name = nullptr;
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while (*s) {
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if ((*s == '\\') || (*s == '/')) {
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file_name = s + 1;
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}
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++s;
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}
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printf("%-25s %s (line %lu)\n", file_name ? file_name : line.FileName, pSymbol->Name, line.LineNumber);
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}
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}
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printf("\n");
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}
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}
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if (total_leaks > 0) {
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printf("%I64u bytes leaked\n\n", total_leaks);
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}
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}
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NOINLINE void* operator new(size_t n) { return p2pool::allocate(n); }
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NOINLINE void* operator new[](size_t n) { return p2pool::allocate(n); }
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NOINLINE void* operator new(size_t n, const std::nothrow_t&) noexcept { return p2pool::allocate(n); }
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NOINLINE void* operator new[](size_t n, const std::nothrow_t&) noexcept { return p2pool::allocate(n); }
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NOINLINE void operator delete(void* p) noexcept { p2pool::deallocate(p); }
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NOINLINE void operator delete[](void* p) noexcept { p2pool::deallocate(p); }
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NOINLINE void operator delete(void* p, size_t) noexcept { p2pool::deallocate(p); }
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NOINLINE void operator delete[](void* p, size_t) noexcept { p2pool::deallocate(p); }
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#else
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void memory_tracking_start() {}
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void memory_tracking_stop() {}
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#endif
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