mtrace分析内存泄漏
1. 测试程序
#include#include <string.h> #include #include #include static void memory_leak_test() { char *p = malloc(4 * 1024); free(p); p = malloc(2 * 1024); p = malloc(1 * 1024); } static int check_leak_start(void) { char log_path[64] = "./log"; setenv("MALLOC_TRACE", log_path, 1); //设置log保存路径 mtrace(); return 0; } static int check_leak_end(void) { char log_path[64] = "./log"; setenv("MALLOC_TRACE", log_path, 1); //设置log保存路径 mtrace(); return 0; } void main() { check_leak_start(); memory_leak_test(); check_leak_end(); }
实验结果:
~/tmp/mtrace_test$ gcc -g mtrace_test.c -o pp ~/tmp/mtrace_test$ ./pp ~/tmp/mtrace_test$ cat log = Start @ ./pp:[0x400678] + 0x1609560 0x1000 @ ./pp:[0x400688] - 0x1609560 @ ./pp:[0x400692] + 0x1609560 0x800 @ ./pp:[0x4006a0] + 0x1609d70 0x400 ~/tmp/mtrace_test$ ~/tmp/mtrace_test$ addr2line -f -e pp 0x400678 memory_leak_test .../tmp/mtrace_test/mtrace_test.c:10 ~/tmp/mtrace_test$ ~/tmp/mtrace_test$ addr2line -f -e pp 0x400688 memory_leak_test .../tmp/mtrace_test/mtrace_test.c:12 //应该是11行的,有点错位 ~/tmp/mtrace_test$ ~/tmp/mtrace_test$ addr2line -f -e pp 0x400692 memory_leak_test .../tmp/mtrace_test/mtrace_test.c:12 ~/tmp/mtrace_test$ ~/tmp/mtrace_test$ addr2line -f -e pp 0x4006a0 memory_leak_test .../tmp/mtrace_test/mtrace_test.c:13
总结
只是打印出申请和释放内存的位置。
参考:https://zhuanlan.zhihu.com/p/83547768