我正在对我的软件进行一些内存分析,并在使用 valgrind 的以下命令运行标准内存泄漏检查后
valgrind --tool=memcheck --leak-check=full ./path_to_program
我得到以下总结:
==12550== LEAK SUMMARY:
==12550== definitely lost: 597,170 bytes in 7 blocks
==12550== indirectly lost: 120 bytes in 10 blocks
==12550== possibly lost: 770,281 bytes in 1,455 blocks
==12550== still reachable: 181,189 bytes in 2,319 blocks
==12550== suppressed: 0 bytes in 0 blocks
==12550== Reachable blocks (those to which a pointer was found) are not shown.
==12550== To see them, rerun with: --leak-check=full --show-reachable=yes
==12550==
==12550== For counts of detected and suppressed errors, rerun with: -v
==12550== ERROR SUMMARY: 325 errors from 325 contexts (suppressed: 176 from 11)
我觉得不太好,所以我的问题是
Why isn't my program exploding if it has all these leaks?
还有什么区别:
我该如何尝试修复它们?
最佳答案
我建议访问 Valgrind FAQ :
With Memcheck's memory leak detector, what's the difference between "definitely lost", "indirectly lost", "possibly lost", "still reachable", and "suppressed"?
The details are in the Memcheck section of the user manual.
In short:
"definitely lost" means your program is leaking memory -- fix those leaks!
"indirectly lost" means your program is leaking memory in a pointer-based structure. (E.g. if the root node of a binary tree is "definitely lost", all the children will be "indirectly lost".) If you fix the "definitely lost" leaks, the "indirectly lost" leaks should go away.
"possibly lost" means your program is leaking memory, unless you're doing unusual things with pointers that could cause them to point into the middle of an allocated block; see the user manual for some possible causes. Use
--show-possibly-lost=noif you don't want to see these reports."still reachable" means your program is probably ok -- it didn't free some memory it could have. This is quite common and often reasonable. Don't use
--show-reachable=yesif you don't want to see these reports."suppressed" means that a leak error has been suppressed. There are some suppressions in the default suppression files. You can ignore suppressed errors.
关于c++ - Valgrind 和内存泄漏,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/9956359/
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