How to get LD_DEBUG of forked process

[David Daney]

On 10/10/2012 11:30 PM, Ajeet Yadav wrote:
> Dear All,
> I wish to check the the LD_DEBUG=reloc for both parent and child process.
>
> Code of parent process p1, that is forking the child process p2
> [ajeet_y@localhost ajeet]$ cat main1.c
> #include <stdio.h>
> #include <unistd.h>
> int main()
> {
>          pid_t pid;
>          printf("In P1\n");
>          pid = fork();
>          if (pid){
>                  sleep(1);
>          } else {
>                  execve("./p2",NULL,NULL);

Here you completely replace the Environment of the process execing p2.

>          }
> }
[...]

>
>
> Can anyone help me why I am not getting the relocation information of
> process P2,

You are not getting the LD_DEBUG=reloc information because that 
environment variable is not set in P2 due to your elimination of the 
entire environment.

>  and how to get it ?

Pass LD_DEBUG=reloc in the environment of any process for which you wish 
to see the dumps.