一、内存泄漏概念
动态申请的内存(new、malloc等)，没有进行释放处理；在程序持续运行过程中，占用的系统内存会越来越多。
二、泄漏检测方法
1.检测之valgrind
// 编译添加–g参数
//valgrind --leak-check=full --show-reachable=yes --trace-children=yes ./ttsTestMain
valgrind --tool=memcheck ./ttsTestMain 执行结果： ==29653== ==29653== HEAP SUMMARY: ==29653== in use at exit: 6,621 bytes in 65 blocks ==29653== total heap usage: 179 allocs, 114 frees, 2,412,787 bytes allocated ==29653== ==29653== LEAK SUMMARY: ==29653== definitely lost: 0 bytes in 0 blocks ==29653== indirectly lost: 0 bytes in 0 blocks ==29653== possibly lost: 0 bytes in 0 blocks ==29653== still reachable: 6,621 bytes in 65 blocks ==29653== suppressed: 0 bytes in 0 blocks ==29653== Rerun with --leak-check=full to see details of leaked memory ==29653== ==29653== For counts of detected and suppressed errors, rerun with: -v ==29653== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
2.检测之tcmalloc
依赖库：libunwind-1.1 gperftools
通过 LD_PRELOAD 设置链接的堆栈处理库
通过 HEAPPROFILE 设置生成分析文件的位置
设置环境记录到文件：
env LD_PRELOAD="/home/app4/e2e_Tts/lib/tcmalloc/libtcmalloc.so" HEAPPROFILE="./perf_log/perf_leak.log" ./ttsTestMain
查看文件信息：
pprof --text /usr/bin/ls ./perf_log/perf_leak.log.0020.heap # 读取 heap 转化成分析结果
直接打印：
env PPROF_PATH=./pprof HEAPCHECK=normal ./ttsTestMain
3.检测之函数重载
C++环境下，我们通过new操作来申请内存，通过delete操作来释放内存，所以如果能够改写默认的new和delete操作的行为，就可以检测内存的状态。
参考：https://www.jianshu.com/p/060063f91f5e
问题：使用vector.pushback时core，待后续分析
====待补充
原文：https://www.cnblogs.com/cyblogs/p/13534724.html