gperftools -- heapcheck 使用

1、下载安装包

       https://gperftools.googlecode.com/files/gperftools-2.0.tar.gz 

2、解压安装

    # tar -xvf gperftools-2.0.tar.gz

    # cd gperftools-2.0

    # ./configure

    #make

    #make install

3、测试

    3.1、编写测试用例

    

    # cat main.c

1 #include <stdlib.h>   2 #include <stdio.h>   3 #include <string.h>   4    5 int main()   6 {   7     printf("hello,world\n");   8     char *p = (char*)malloc(1024*1024);   9     //free(p);  10   11     char *buf = (char*)malloc(1024);  12     return 0;  13 }

    

    # gcc -g -o test main.c -ltcmalloc    # -g 编译选项可以忽略

    3.2、设置相关的环境变量         

    # which pprof

         /usr/local/bin/pprof

    # export PPROF_PATH=/usr/local/bin/pprof 

    # env HEAPCHECK=normal  LD_PRELOAD="/usr/local/lib/libtcmalloc.so"    ./test                                         

WARNING: Perftools heap leak checker is active -- Performance may suffer hello,world Leak check _main_ detected leaks of 1049600 bytes in 2 objects The 2 largest leaks: Using local file ./test. Leak of 1048576 bytes in 1 objects allocated from: @ 80484bd main                                ######没法定位到行？？？？############## @ 244e9c __libc_start_main @ 80483e1 _start Leak of 1024 bytes in 1 objects allocated from: @ 80484cc main                                 ######没法定位到行？？？？############## @ 244e9c __libc_start_main @ 80483e1 _start If the preceding stack traces are not enough to find the leaks, try running THIS shell command: pprof ./test "/tmp/test.25651._main_-end.heap" --inuse_objects --lines --heapcheck  --edgefraction=1e-10 --nodefraction=1e-10 --gv If you are still puzzled about why the leaks are there, try rerunning this program with HEAP_CHECK_TEST_POINTER_ALIGNMENT=1 and/or with HEAP_CHECK_MAX_POINTER_OFFSET=-1 If the leak report occurs in a small fraction of runs, try running with TCMALLOC_MAX_FREE_QUEUE_SIZE of few hundred MB or with TCMALLOC_RECLAIM_MEMORY=false, it might help find leaks more repeatably Exiting with error code (instead of crashing) because of whole-program memory leaks

    

我们可以使用pprof工具查看内存使用情况

# pprof --text ./test  "/tmp/test.25651._main_-end.heap"

Using local file ./test. Using local file /tmp/test.25651._main_-end.heap. Total: 1.0 MB      1.0 100.0% 100.0%      1.0 100.0% main      0.0   0.0% 100.0%      1.0 100.0% __libc_start_main      0.0   0.0% 100.0%      1.0 100.0% _start

关于列的说明参考：

https://gperftools.googlecode.com/svn/trunk/doc/heapprofile.html#pprof

问题思考：

怎么检查程序中带有pause()函数调用程序的内存泄漏？！！！