Why this simple case hang

[haitao wang]

I'm a newbie to drmemory and I tried this simple test case,

which includes a invalid store.

------------------------------ mem_test.c --------

#include <stdio.h>
#include <stdlib.h>
#include <malloc.h>

int main(int argc, char * argv[])
{
    int  * p=(int*)malloc(100*sizeof(int));

    p[100]=1;

     free(p);

    return 0;

}

--------------------------------------

however, when I tried drmory by this command

drmemory -- ./mem_test

It get stuck in a deadloop. 

while valgrind can work perfect and detect the error correctly.

Is there anything wrong in my test?  and any suggestion?

Thanks,

Haitao

[Derek Bruening]

You didn't provide important details like what version of drmemory, what OS version, what architecture, compilation command, etc.

It seems to work fine when I try it:

$ bin64/drmemory -- ~/dr/test/drmem-user

~~Dr.M~~ Dr. Memory version 2.6.0

~~Dr.M~~ 

~~Dr.M~~ Error #1: UNADDRESSABLE ACCESS beyond heap bounds: writing 0x00007f7129800330-0x00007f7129800334 4 byte(s)

~~Dr.M~~ # 0 main      

~~Dr.M~~ Note: @0:00:00.344 in thread 2898892

~~Dr.M~~ Note: refers to 0 byte(s) beyond last valid byte in prior malloc

~~Dr.M~~ Note: prev lower malloc:  0x00007f71298001a0-0x00007f7129800330

~~Dr.M~~ Note: instruction: mov    $0x00000001 -> (%rax)

--

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