c++ - 如何从 C++ 程序内部测量内存使用情况？

Question

对于 c++ 程序，是否可以跟踪程序一次使用了多少内存？

例如，带有原型(prototype)的函数:

int getEstimatedTotalMemoryUsage();

我想如果不可能，那么就必须退出程序，进行系统调用并从那里检查结果。如果是这样，有哪些工具可用于此类目的？假设这样的事情是可能的，那就是。

编辑:我正在使用 linux，有什么工具可以为你做到这一点？

Answer 1

是的 - 使用 POSIX getrusage .来自 Linux man page :

Synopsis

#include <sys/time.h>
#include <sys/resource.h>

int getrusage(int who, struct rusage *usage);

Description

getrusage() returns current resource usages, for a who of either RUSAGE_SELF or RUSAGE_CHILDREN. The former asks for resources used by the current process, the latter for resources used by those of its children that have terminated and have been waited for.

struct rusage {
    struct timeval ru_utime; /* user time used */
    struct timeval ru_stime; /* system time used */
    long   ru_maxrss;        /* maximum resident set size */
    long   ru_ixrss;         /* integral shared memory size */
    long   ru_idrss;         /* integral unshared data size */
    long   ru_isrss;         /* integral unshared stack size */
    long   ru_minflt;        /* page reclaims */
    long   ru_majflt;        /* page faults */
    long   ru_nswap;         /* swaps */
    long   ru_inblock;       /* block input operations */
    long   ru_oublock;       /* block output operations */
    long   ru_msgsnd;        /* messages sent */
    long   ru_msgrcv;        /* messages received */
    long   ru_nsignals;      /* signals received */
    long   ru_nvcsw;         /* voluntary context switches */
    long   ru_nivcsw;        /* involuntary context switches */
};