Linux記憶體洩漏檢查工具 valgrind

valgrind工具功能很多，可以動態檢測程式執行時的問題，其中一項就是檢測記憶體洩漏。

使用方法： valgrind [options] prog-and-args

用例：問題程式**: memleak.c

#include #include main(int argc, char **argv)

執行程式: valgrind ./memleak

輸出結果:

==17823== memcheck, a memory error detector

==17823== command: ./memleak
==17823== 
==17823== 
==17823== heap summary:
==17823== in use at exit: 10 bytes in 1 blocks
==17823== total heap usage: 2 allocs, 1 frees, 15 bytes allocated
==17823== 
==17823== leak summary:
==17823== definitely lost: 10 bytes in 1 blocks
==17823== indirectly lost: 0 bytes in 0 blocks
==17823== possibly lost: 0 bytes in 0 blocks
==17823== still reachable: 0 bytes in 0 blocks
==17823== suppressed: 0 bytes in 0 blocks
==17823== rerun with --leak-check=full to see details of leaked memory
==17823== 
==17823== for counts of detected and suppressed errors, rerun with: -v
==17823== error summary: 0 errors from 0 contexts (suppressed: 12 from 7)

紅色字型部分顯示程式有兩次動態記憶體分配，共15個位元組，只free了一次，記憶體洩漏10個位元組

valgrind缺點：

目前好像只適用於gnu/linux x86平台

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