Linux下用Mtrace来检查程序内存溢出

$export MALLOC_TRACE=mymemory.log

$mtrace testmem $MALLOC_TRACE

[hwang@langchao test]$ cat testmtrace.c
#include 
#include 
#include 
int main()
{
        char *hello;
        mtrace();
        hello = (char*) malloc(20);
        sprintf(hello,"
hello world!");
        return 1;
}
[hwang@langchao test]$export MALLOC_TRACE=mytrace.log
[hwang@langchao test]$ gcc testmtrace.c -o testmtrace
[hwang@langchao test]$./testmtrace
[hwang@langchao test]$ mtrace testmtrace mytrace.log
Memory not freed:
-----------------
Address Size Caller
0x08049860 0x14 at /usr/src/build/53700-i386/BUILD/glibc-2.2.4/csu/init.c:0