[cfe-dev] Question about Clang/LLVM addresssanitizer

ZhaoKang via cfe-dev cfe-dev at lists.llvm.org
Wed Sep 21 18:52:05 PDT 2016


Thanks!
Please see the two attached files, you want.


Best wishes,
Kang


-----原始邮件-----
发件人: "Kostya Serebryany" <kcc at google.com>
发送时间: 2016-09-22 01:48:31 (星期四)
收件人: ZhaoKang <zhaokang at mail.tsinghua.edu.cn>
抄送: "Clang Dev" <cfe-dev at lists.llvm.org>
主题: Re: Re: Re: Re: Re: Re: [cfe-dev] Question about Clang/LLVM addresssanitizer


Ok, let's make a simpler experiment:


#include <sys/mman.h>
#include <stdio.h>
int main() {
  void *beg = (void*)0x67fff8000;
  void *res = mmap(beg, 17179869184, PROT_READ|PROT_WRITE,
     MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0);
  if (res == beg)
    printf("PASS\n");
  else 
    printf("FAIL\n");
}


Compile this program, run it on both systems, make sure you see PASS on one and FAIL on the other. 
Then send the strace logs to me, just in case. 


--kcc 




On Wed, Sep 21, 2016 at 12:27 AM, ZhaoKang <zhaokang at mail.tsinghua.edu.cn> wrote:
Please see the attached two logs.
They are the results under strace.
And, we will try to run on the images you said below.
If the bug is reproduced there, we will contact with you ASAP.
Thanks a lot!


Kang



-----原始邮件-----
发件人: "Kostya Serebryany" <kcc at google.com>
发送时间: 2016-09-21 13:05:14 (星期三)
收件人: ZhaoKang <zhaokang at mail.tsinghua.edu.cn>
抄送: "Clang Dev" <cfe-dev at lists.llvm.org>
主题: Re: Re: Re: Re: Re: [cfe-dev] Question about Clang/LLVM addresssanitizer






On Tue, Sep 20, 2016 at 10:00 PM, ZhaoKang <zhaokang at mail.tsinghua.edu.cn> wrote:


Hello Kostya,

I run the same binary on different VMs, one is redhat5.9 and the other one is redhat 6.5.

And dump the outputs to two log files (attachments) .

I'm sorry for our VM cannot be accessed by other groups.



Please check if you can reproduce this on any of the OS types available on GCE.
https://cloud.google.com/compute/docs/images
If/when you verify that it reproduces on one of them, I'll try to debug it there. 
 

Please see the attached files, one is failed and another is right.



I need the results of a run under strace. 
 

Many thanks!












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