[Valgrind-users] Please check the dhat could run in the ELF32 mode in x86-64.

[Wuweijia]

Hi: I compile the code in x86-64 machine, and run dhat . it is ok.
The compile cmd: gcc -g -O0  main.c
The dhat cmd valgrind -tool=exp-dhat ./a.out


But I compile the same code in the same machine, but another compile cmd,  and 
run dhat. It failed.
The compile cmd: gcc -g -O0 -m32 main.c
The dhat cmd valgrind -tool=exp-dhat ./a.out

I just compile same code into ELF32 mode.


The output as below:
DHAT: dh_main.c:756 (dh_handle_noninsn_write): the 'impossible' happened.

host stacktrace:
==84382==    at 0x3800C886: show_sched_status_wrk (m_libcassert.c:343)
==84382==    by 0x3800C9C6: report_and_quit (m_libcassert.c:419)
==84382==    by 0x3800CAEB: vgPlain_assert_fail (m_libcassert.c:485)
==84382==    by 0x38008623: dh_handle_noninsn_write (dh_main.c:756)
==84382==    by 0x38010558: final_tidyup (m_main.c:2798)
==84382==    by 0x38010A54: shutdown_actions_NORETURN (m_main.c:2564)
==84382==    by 0x38078E90: run_a_thread_NORETURN (syswrap-linux.c:199)

sched status:
  running_tid=1

Thread 1: status = VgTs_Runnable (lwpid 84382)
==84382==    at 0x402452B: _vgnU_freeres (vg_preloaded.c:59)
==84382==    by 0x2: ???


The valgrind version is 3.12.0

root@SZV1000161574:/usr1/code/source/test# gcc --version
gcc (Ubuntu 4.8.4-2ubuntu1~14.04.3) 4.8.4
Copyright (C) 2013 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is


Does dhat support elf32 mode?

BR
Owen

output.log
Description: output.log

#include    <stdio.h>  
#include    <stdlib.h>  
#include    <string.h>
#include    <fcntl.h>  
#include    <unistd.h>  
#include    <sys/mman.h>  
#include    <sys/types.h>  
#include    <sys/stat.h>  
//#include    "dhat.h"

//获取文件大小，单位bytes  
size_t getFileSize(const char* path)  
{  
    struct stat buf;  
    if( stat(path, &buf)<0 )  
    {  
        perror("stat");  
        exit(1);  
    }  
    return buf.st_size;  
}  
int main(int argc, char *argv[])  
{  
    char* pmap=NULL; 
    int fdSem ; 
    size_t filesize=getFileSize("output.log"); 
    int fd=open("output.log", O_RDWR );  
    if( fd<0 )  
    {  
        perror("open");  
        exit(1);  
    } 
//    fdSem = open("sem.txt", O_CREAT); 
//    close(fdSem);
//    printf("fdSem=%d\n", fdSem);
    pmap=(char*)mmap(NULL, filesize, PROT_READ|PROT_WRITE , MAP_SHARED, fd, 0); 
    if( MAP_FAILED==pmap )  
    {  
        perror("mmap");  
        exit(1);  
    }  

//    VALGRIND_DO_MMAP_REGISTER(pmap, filesize);
      
    write(1, pmap, filesize);  
    write(1, pmap, filesize);
    close(fd);  
    munmap(pmap, filesize); 
//    VALGRIND_DO_MUNMAP_UNREGISTER(pmap, filesize); 
#if 0
    pmap = (char *)malloc(1024  );
    memset(pmap, 0, 512);
    memset(pmap, 2, 128);
    printf("%p = %s\n",pmap, pmap );
    free(pmap);
#endif
    return 0;  
}  

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