Re: [Qemu-devel] [PATCH] User qemu profiling

[Aurelien Jarno <aurelien@aurel32.net>]

On Wed, Oct 29, 2008 at 10:28:14AM +0100, Laurent Desnogues wrote:
> Hello,
> 
> this patch:
> 
>   - Makefile.target:  re-enable profiling for user qemu.  It seems
>     profiling was (accidently?) removed by commit 3937
> 
>   - syscall.c:
>       * add an include to get _mcleanup prototype
>       * add a call to _mcleanup for exit_group in a way
>         similar to what is done for exit
> 
> BTW, I wonder why -p is preferred over -pg for profiling.
> 
> Thanks,
> 
> Laurent

Applied, thanks

> Index: Makefile.target
> ===================================================================
> --- Makefile.target	(revision 5545)
> +++ Makefile.target	(working copy)
> @@ -394,6 +394,12 @@
>  endif
>  endif
>  
> +# profiling code
> +ifdef TARGET_GPROF
> +LDFLAGS+=-p
> +CFLAGS+=-p
> +endif
> +
>  OBJS= main.o syscall.o strace.o mmap.o signal.o path.o thunk.o \
>        elfload.o linuxload.o uaccess.o
>  LIBS+= $(AIOLIBS)
> Index: linux-user/syscall.c
> ===================================================================
> --- linux-user/syscall.c	(revision 5566)
> +++ linux-user/syscall.c	(working copy)
> @@ -54,6 +54,9 @@
>  #include <netinet/ip.h>
>  #include <netinet/tcp.h>
>  #include <qemu-common.h>
> +#ifdef HAVE_GPROF
> +#include <sys/gmon.h>
> +#endif
>  
>  #define termios host_termios
>  #define winsize host_winsize
> @@ -4864,6 +4867,9 @@
>  #ifdef __NR_exit_group
>          /* new thread calls */
>      case TARGET_NR_exit_group:
> +#ifdef HAVE_GPROF
> +        _mcleanup();
> +#endif
>          gdb_exit(cpu_env, arg1);
>          ret = get_errno(exit_group(arg1));
>          break;


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