[Valgrind-users] 答复: hello there is a question about callgrind on the arm64.

[Wuweijia <wuw...@hu...>]

Hi:
	Is there any news?

BR
Owen

-----邮件原件-----
发件人: Wuweijia 
发送时间: 2017年5月12日 12:40
收件人: 'John Reiser' <jr...@bi...>; val...@li...
抄送: Fanbohao <fan...@hu...>
主题: 答复: [Valgrind-users] hello there is a question about callgrind on the arm64.


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

char getCommon(char * argv) {
    char result = 0;
    result = argv[0];
    for(int i = 0; i < 2; i++ ) {
         if( argv[1] > 100 ) {
            result += argv[1] + 10;
         }

         if( argv[2] < 30 ) {
            result += argv[2] * 2;
         }
    }    

    return result;
}

char getCommon2(char * argv) {
    char result = 0;
    result = argv[0];
    for(int i = 0; i < 2; i++ ) { 
         if( argv[1] > 20 ) { 
            result += argv[1] + 10; 
         }   

         if( argv[2] < 110 ) { 
            result += argv[2] * 3;
         }   
    }    

    return result;
}


int main(int argc, char ** argv) {
    unsigned long i = 0;
    char * p = (char *)malloc(1024 * 1024);
    memset(p, 1, 1024 * 1024); 

    
   for(int i = 0; i < 10; i++ ) {
       for(int j = 0; j < 1024 * 1024 - 3; j++) {
            if(j % 2 == 0) { 
              p[j] = getCommon(p + j);
            } else {
              p[j] = getCommon2(p + j);
            }
       }
        memset(p, 1, 1024 * 1024);
   }
   printf("p=%p\n", p); 
    return 0;
}
-----邮件原件-----
发件人: John Reiser [mailto:jr...@bi...] 
发送时间: 2017年5月12日 11:18
收件人: val...@li...
主题: Re: [Valgrind-users] hello there is a question about callgrind on the arm64.

>       In arm64:
> 
>          There is function name main’2. It meaning that there is recursive cycle. And it annote the source failed.
> 
>       In x86_64:
> 
>       There is no  function name  main’2  only main., It mean that there is no cycle.
> 
>       How can I resolve it?

Post here the source code to the smallest (shortest) program which does not behave like you expect.

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