如何解决C++协程泄漏内存和帧
我正在使用 cppcoro 试验 C++ 中的协程。但是 Address Sanitizer 似乎总是不高兴我正在泄漏内存。为什么?我从未使用原始的 new/delete 分配任何内容,也从未导致与 shared_ptr
的循环依赖。
#include <cppcoro/task.hpp>
#include <cppcoro/sync_wait.hpp>
#include <iostream>
class A {
public:
A() { std::cerr << "A ctor\n"; }
~A() { std::cerr << "A dtor\n"; }
};
int main()
{
auto getACoro = []() -> cppcoro::task<std::shared_ptr<A>> {
co_return std::make_shared<A>();
};
auto foo = [getACoro]() -> cppcoro::task<> {
co_await getACoro();
co_return;
};
auto coro = [&foo]() -> cppcoro::task<> {
co_await foo();
};
cppcoro::sync_wait(coro());
}
编译:{{1}}
然后地址消毒剂抱怨:
g++ -std=c++20 -focorutines main.cpp -o main -lcppcoro -g -O -fsanitize=address
据我所知。 =================================================================
==274677==ERROR: LeakSanitizer: detected memory leaks
Indirect leak of 88 byte(s) in 1 object(s) allocated from:
#0 0x7ff558d7af41 in operator new(unsigned long) /build/gcc/src/gcc/libsanitizer/asan/asan_new_delete.cpp:99
#1 0x560128e69267 in operator() /home/marty/Documents/experiments/cpp/main.cpp:47
#2 0x560128e69267 in main::{lambda()#3}::operator()() const [clone .actor] /home/marty/Documents/experiments/cpp/main.cpp:50
Indirect leak of 80 byte(s) in 1 object(s) allocated from:
#0 0x7ff558d7af41 in operator new(unsigned long) /build/gcc/src/gcc/libsanitizer/asan/asan_new_delete.cpp:99
#1 0x560128e6878e in operator() /home/marty/Documents/experiments/cpp/main.cpp:43
#2 0x560128e6878e in main::{lambda()#2}::operator()() const [clone .actor] /home/marty/Documents/experiments/cpp/main.cpp:45
#3 0x560128f7b997 (/home/marty/Documents/experiments/cpp/main+0x145997)
Indirect leak of 24 byte(s) in 1 object(s) allocated from:
#0 0x7ff558d7af41 in operator new(unsigned long) /build/gcc/src/gcc/libsanitizer/asan/asan_new_delete.cpp:99
#1 0x560128e71168 in __gnu_cxx::new_allocator<std::_Sp_counted_ptr_inplace<A,std::allocator<A>,(__gnu_cxx::_Lock_policy)2> >::allocate(unsigned long,void const*) /usr/include/c++/10.2.0/ext/new_allocator.h:115
#2 0x560128e71168 in std::allocator<std::_Sp_counted_ptr_inplace<A,(__gnu_cxx::_Lock_policy)2> >::allocate(unsigned long) /usr/include/c++/10.2.0/bits/allocator.h:173
#3 0x560128e71168 in std::allocator_traits<std::allocator<std::_Sp_counted_ptr_inplace<A,(__gnu_cxx::_Lock_policy)2> > >::allocate(std::allocator<std::_Sp_counted_ptr_inplace<A,(__gnu_cxx::_Lock_policy)2> >&,unsigned long) /usr/include/c++/10.2.0/bits/alloc_traits.h:460
#4 0x560128e71168 in std::__allocated_ptr<std::allocator<std::_Sp_counted_ptr_inplace<A,(__gnu_cxx::_Lock_policy)2> > > std::__allocate_guarded<std::allocator<std::_Sp_counted_ptr_inplace<A,(__gnu_cxx::_Lock_policy)2> > >(std::allocator<std::_Sp_counted_ptr_inplace<A,(__gnu_cxx::_Lock_policy)2> >&) /usr/include/c++/10.2.0/bits/allocated_ptr.h:97
#5 0xbe0b47d5ffffffff (<unknown module>)
SUMMARY: AddressSanitizer: 192 byte(s) leaked in 3 allocation(s).
应该在 shared_ptr
之后立即销毁。为什么会被认为是泄露的?以及为什么协程帧会泄漏?
编译器:GCC 10.2 操作系统:Linux
版权声明:本文内容由互联网用户自发贡献,该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容, 请发送邮件至 dio@foxmail.com 举报,一经查实,本站将立刻删除。