On Jul 27, 2015, at 2:56 AM, LiHaifeng <[email protected]> wrote:
> It's known that the jemalloc is adopted by Android. Recently I want to dump
> some jemalloc status information with the thread exit. Fortunately, the
> function of status dump has been done by jemalloc.
>
> After tuned the variable of opt_stats_print into true in malloc_init_hard(),
> the stats_print_atexit() was registered as an hook for atexit(). But, there
> is nothing status information dumped when the process exit and there is only
> the warning on the console like below.
>
> "W/libc ( 859): WARNING: generic atexit() called from legacy shared
> library"
>
> So, how to dump the jemalloc status on Android?
There appears to have been some change to glibc within the past two years that
causes stdin/stdout/stderr to be closed before atexit-registered functions run.
To work around this you can directly call malloc_stats_print() directly in
your application before it exits. I ran into this a few days ago on an Ubuntu
15.04 system, and found this related bug report while trying to diagnose the
issue:
https://code.google.com/p/address-sanitizer/issues/detail?id=263
Jason
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