memory-leaks 相关问题

当程序无法释放已分配但不再使用且无法恢复的内存时，会发生内存泄漏。

如何设置免费策略？

我在生产环境（k8s 中的容器）中遇到了高内存使用率（看起来像内存泄漏），并想检查是否是由于“MADV_FREE”行为所致。有没有办法

linux memory rust memory-leaks malloc

回答 1 投票 0

Leak sanitizer - 如何追踪非动态未知模块？

示例：Java 源代码 Foo.java：公共类 Foo { 公共静态无效主（字符串[]参数）{} }; 我在 Ubuntu 24.04 docker 上运行它，并预加载了地址清理程序（包含泄漏清理程序），以及一个

java c memory-leaks stack-trace address-sanitizer

回答 1 投票 0

strace 输出未显示多线程应用程序中的 malloc 和 free 系统调用

我尝试使用以下代码模拟内存泄漏问题，然后调查导致内存泄漏的系统调用。包括 #包括 #包括我尝试使用以下代码模拟内存泄漏问题，然后调查导致内存泄漏的系统调用。 include <iostream> #include <thread> #include <chrono> #include <mutex> #include <ctime> class SharedObject { public: std::string currentTime; SharedObject() { // Capture current time as string auto now = std::chrono::system_clock::to_time_t(std::chrono::system_clock::now()); currentTime = std::ctime(&now); // Convert time to string } void displayTime() { std::cout << "Current Time: " << currentTime; } }; void threadFunction(const std::string& threadName, int totalIterations) { for (int iteration = 1; iteration <= totalIterations; ++iteration) { SharedObject* obj = new SharedObject(); // Create object std::cout << threadName << " created an object at iteration " << iteration << std::endl; obj->displayTime(); // Every 100 iterations, forget to delete the object (simulating memory leak) if (iteration % 2 == 1) { std::cout << threadName << " forgot to delete the object at iteration " << iteration << std::endl; } else { delete obj; // Delete object std::cout << threadName << " deleted the object at iteration " << iteration << std::endl; } // Sleep for 512 milliseconds std::this_thread::sleep_for(std::chrono::milliseconds(512)); } std::cout << threadName << " completed all iterations.\n"; }int main() { const int totalIterations = 100000; // Launch two threads std::thread thread1(threadFunction, "Thread 1", totalIterations); std::thread thread2(threadFunction, "Thread 2", totalIterations); // Wait for threads to finish thread1.join(); thread2.join(); std::cout << "Both threads completed execution.\n"; return 0; } 我已经在Linux soumajit-HP-Pavilion-Desktop-590-p0xxx 5.4.0-150-generic #167~18.04.1-Ubuntu SMP Wed May 24 00:51:42 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux system中编译并运行了程序发布我正在尝试使用 malloc 跟踪 free 和 strace 系统调用。以下是输出 [pid 18031] <... stat resumed> {st_mode=S_IFREG|0644, st_size=312, ...}) = 0 [pid 18032] write(1, "Current Time: Tue Jan 14 23:08:3"..., 39) = 39 [pid 18031] futex(0x7fcf11c08c20, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 18032] write(1, "Thread 2 deleted the object at i"..., 46) = 46 [pid 18031] <... futex resumed> ) = 0 [pid 18032] nanosleep({tv_sec=0, tv_nsec=512000000}, <unfinished ...> [pid 18031] write(1, "Thread 1 created an object at it"..., 45) = 45 [pid 18031] write(1, "Current Time: Tue Jan 14 23:08:3"..., 39) = 39 [pid 18031] write(1, "Thread 1 forgot to delete the ob"..., 55) = 55 [pid 18031] nanosleep({tv_sec=0, tv_nsec=512000000}, <unfinished ...> [pid 18032] <... nanosleep resumed> 0x7fcf10c7ace0) = 0 [pid 18032] stat("/etc/localtime", <unfinished ...> [pid 18031] <... nanosleep resumed> 0x7fcf1147bce0) = 0 [pid 18032] <... stat resumed> {st_mode=S_IFREG|0644, st_size=312, ...}) = 0 [pid 18031] futex(0x7fcf11c08c20, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 18032] futex(0x7fcf11c08c20, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 18031] <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable) [pid 18032] <... futex resumed> ) = 0 [pid 18031] stat("/etc/localtime", <unfinished ...> [pid 18032] write(1, "Thread 2 created an object at it"..., 45 <unfinished ...> [pid 18031] <... stat resumed> {st_mode=S_IFREG|0644, st_size=312, ...}) = 0 [pid 18032] <... write resumed> ) = 45 [pid 18032] write(1, "Current Time: Tue Jan 14 23:08:3"..., 39 <unfinished ...> [pid 18031] futex(0x7fcf11c08c20, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> [pid 18032] <... write resumed> ) = 39 [pid 18031] <... futex resumed> ) = 0 [pid 18032] write(1, "Thread 2 forgot to delete the ob"..., 55 <unfinished ...> [pid 18031] futex(0x7fcf11c088c0, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> [pid 18032] <... write resumed> ) = 55 [pid 18032] futex(0x7fcf11c088c0, FUTEX_WAKE_PRIVATE, 1) = 1 [pid 18031] <... futex resumed> ) = 0 [pid 18032] nanosleep({tv_sec=0, tv_nsec=512000000}, <unfinished ...> [pid 18031] futex(0x7fcf11c088c0, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 18031] write(1, "Thread 1 created an object at it"..., 45) = 45 [pid 18031] write(1, "Current Time: Tue Jan 14 23:08:3"..., 39) = 39 [pid 18031] write(1, "Thread 1 deleted the object at i"..., 46) = 46 [pid 18031] nanosleep({tv_sec=0, tv_nsec=512000000}, 为什么 strace 输出中没有捕获内存分配和取消分配调用？ strace是“系统调用/信号跟踪”的缩写。有一些与内存管理相关的系统调用 (sbrk/brk/mmap)，但这些都是低级的，对于调试内存泄漏问题没有用处。如果你想跟踪内存泄漏，你可以使用 g++/clang++ 中提供的类似 AddressSanitizer 的东西： $ g++ -fsanitize=address -g -o code code.cc $ ./code ... Thread 2 completed all iterations. Thread 1 completed all iterations. Both threads completed execution. ================================================================= ==1153114==ERROR: LeakSanitizer: detected memory leaks Direct leak of 320 byte(s) in 10 object(s) allocated from: #0 0x75f22d59e548 in operator new(unsigned long) ../../../../src/libsanitizer/asan/asan_new_delete.cpp:95 #1 0x56ef3081f76d in threadFunction(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int) /tmp/x.cc:24 #2 0x56ef30822e7a in void std::__invoke_impl<void, void (*)(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int), char const*, int>(std::__invoke_other, void (*&&)(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int), char const*&&, int&&) /usr/include/c++/13/bits/invoke.h:61 #3 0x56ef30822c4b in std::__invoke_result<void (*)(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int), char const*, int>::type std::__invoke<void (*)(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int), char const*, int>(void (*&&)(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int), char const*&&, int&&) /usr/include/c++/13/bits/invoke.h:96 #4 0x56ef30822b6a in void std::thread::_Invoker<std::tuple<void (*)(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int), char const*, int> >::_M_invoke<0ul, 1ul, 2ul>(std::_Index_tuple<0ul, 1ul, 2ul>) /usr/include/c++/13/bits/std_thread.h:292 #5 0x56ef30822b03 in std::thread::_Invoker<std::tuple<void (*)(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int), char const*, int> >::operator()() /usr/include/c++/13/bits/std_thread.h:299 #6 0x56ef30822ae3 in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (*)(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int), char const*, int> > >::_M_run() /usr/include/c++/13/bits/std_thread.h:244 #7 0x75f22d30edb3 (/lib/x86_64-linux-gnu/libstdc++.so.6+0xecdb3) (BuildId: ca77dae775ec87540acd7218fa990c40d1c94ab1) #8 0x75f22d4fea41 in asan_thread_start ../../../../src/libsanitizer/asan/asan_interceptors.cpp:234 #9 0x75f22cf95a93 in start_thread nptl/pthread_create.c:447 （我将迭代次数限制为10）更多信息这里。

linux memory-leaks system-calls strace

回答 1 投票 0

.Net 4.5.1 ConcurrentDictionary TryRemove() 方法是否释放分配的内存？

我有一个由元素组成的缓存，每个元素包含两个并发字典，我认为它们可能是导致我的应用程序中内存泄漏的原因。我经常添加和删除东西

c# .net memory-leaks concurrentdictionary .net-4.5

回答 3 投票 0

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node.js typescript memory-leaks out-of-memory tsx

回答 1 投票 0

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c gcc memory-leaks

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swift memory-leaks uikit uiactivityviewcontroller

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回答 4 投票 0

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java spring-boot memory memory-leaks overflow

回答 1 投票 0

Hibernate内存泄漏-BoundedConcurrentHashMap

请帮忙解决Spring MVC应用程序中的内存问题请找到我的交易配置请帮助解决 Spring MVC 应用程序中的内存问题请查看我的交易配置 <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close" p:driverClass="${jdbc.driverClassName}" p:jdbcUrl="${jdbc.databaseurl}${jdbc.encoding}" p:user="${jdbc.username}" p:password="${jdbc.password}" p:minPoolSize="${minPoolSize}" p:maxPoolSize="${maxPoolSize}" p:checkoutTimeout="${checkoutTimeout}" p:maxIdleTime="${maxIdleTime}" p:idleConnectionTestPeriod="${idleConnectionTestPeriod}" /> jdbc: minPoolSize=15 initalPollSize=25 maxPoolSize=60 #Give up waiting for a connection after this many milliseconds checkoutTimeout=18000 maxIdleTime=3600 idleConnectionTestPeriod=300 maxStatements=100 numHelperThreads=15 acquireIncrement=10  <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <property name="hibernateProperties"> <props> <prop key="hibernate.dialect">${jdbc.dialect}</prop> <prop key="hibernate.show_sql">false</prop> <prop key="hibernate.generate_statistics">false</prop> </props> </property> <property name="entityInterceptor" ref="auditInterceptor"> </property> </bean>  <bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory" /> </bean>  <bean id="transactionInterceptor" class="org.springframework.transaction.interceptor.TransactionInterceptor"> <property name="transactionManager" ref="transactionManager" /> </bean> <bean class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator"> <property name="beanNames"> <list> <value>*Service</value> </list> </property> <property name="interceptorNames"> <list> <value>exceptionInterceptor</value> <value>transactionInterceptor</value> </list> </property> </bean> 性能测试后，我的内存没有被释放。因此，在分析堆转储时出现以下错误 “org.apache.catalina.loader.WebappClassLoader @ 0x76000b8e8”加载的“org.hibernate.internal.SessionFactoryImpl”的一个实例占用 73,446,008 (32.66%) 字节。内存累积在由“org.apache.catalina.loader.WebappClassLoader @ 0x76000b8e8”加载的“org.hibernate.internal.util.collections.BoundedConcurrentHashMap$Segment[]”的一个实例中。 org.hibernate.internal.SessionFactoryImpl @ 0x7624efeb0 136 49,987,288 34.31% \org.hibernate.engine.query.spi.QueryPlanCache @ 0x7630b1250 32 47,674,176 32.72% .\org.hibernate.internal.util.collections.BoundedConcurrentHashMap @ 0x763259a58 48 47,554,336 32.64% ..\org.hibernate.internal.util.collections.BoundedConcurrentHashMap$Segment[32] @ 0x7632d1c60 144 47,554,288 32.64% 班级名称|浅堆|保留堆|百分比 org.hibernate.internal.util.collections.BoundedConcurrentHashMap$Segment[32] @ 0x7632d1c60 | 144 | 144 47,554,288 | 47,554,288 32.64% |- org.hibernate.internal.util.collections.BoundedConcurrentHashMap$Segment @ 0x76325ac88 | 48 | 48 1,497,688 | 1,497,688 1.03% |- org.hibernate.internal.util.collections.BoundedConcurrentHashMap$Segment @ 0x76325ac58 | 48 | 48 1,631,272 | 1,631,272 1.12% | |- org.hibernate.internal.util.collections.BoundedConcurrentHashMap$LIRSHashEntry @ 0x768fd54c0 | 56 | 56 880 | 880 0.00% | | |- org.hibernate.engine.query.spi.sql.NativeSQLQuerySpecification @ 0x7671eb8e8 | 32 | 32 48 | 48 0.00% | | | '- org.hibernate.engine.query.spi.sql.NativeSQLQueryReturn[0] @ 0x768ff16d0 | 16 | 16 16 | 16 0.00% | | |- org.hibernate.engine.query.spi.NativeSQLQueryPlan @ 0x768ff1640 | 24 | 520 | 520 0.00% | | |- java.lang.String @ 0x768ff1658 选择不同的 column FROM table WHERE column IN (94316) | 24 | 256 | 256 0.00% 请帮忙解决问题我们在堆中观察到一个查询。来自表，其中 statusFlg='Y' 且 deleteFlg='N' 且 id="+autoGenerateId 当我们将查询更改为来自表，其中 statusFlg='Y' 且 deleteFlg='N' 且 id= :instanceid").setParameter("instanceId,autoGenerateId) 会话对象正在被垃圾收集。有人可以详细解释一下吗我刚刚遇到了类似的问题。 JPA程序会缓存从JPQL翻译过来的SQL语句，以避免因重复查询而频繁转换的开销。当我使用 JVM 分析工具检查内存使用情况时，我发现缓存的 SQL 查询占用了高达 3000MB 的内存空间！为了解决这个问题，我调整了可以缓存的 SQL 语句的最大数量，结果成功了。祝你好运！

spring hibernate spring-mvc memory-leaks spring-transactions

回答 2 投票 0

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c++ memory-leaks valgrind

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