[Linux-ia64] gcc profiling broken on Linux/ia64?

[Linux-ia64] gcc profiling broken on Linux/ia64?

[Randolph Chung]

Greetings....

I was wondering if anyone has gotten gcc profiling to work on 
linux/ia64?

$ cat hello.c 
int main(int argc, char **argv) { return 0; }
$ gcc -pg -o hello hello.c
$ ./hello
Segmentation fault

I've tried this with the 2.96 compilers on RedHat 7.2 as well as both
2.96 and 3.0.4 compilers on Debian 3.0 (glibc 2.2.4 on RH, 2.2.5 on
Debian)

Backtrace with gdb looks like this:

(gdb) bt
#0  __mcount (frompc\x16140901064496364080, selfpcF11686018427390128)
    at mcount.c:96
#1  0x20000000001fdf30 in mcount () at soinit.c:56
#2  0x40000000000008b0 in main (argc\x1073766400, argv=0x7000a1000005501)
    at hello.c:1

mcount.c:96         toindex = *frompcindex;

(gdb) print frompcindex
$1 = (u_short *) 0xa000000000471ce8

Any pointers would be much appreciated.

randolph

Re: [Linux-ia64] gcc profiling broken on Linux/ia64?

[Gary Hade]

Randolph,
I believe this problem is due to a bug in /usr/lib/gcrt1.o 
that was fixed by recent glibc changes to csu/gmon-start.c
(revs 1.13 and 1.14).

Hope this helps.

Gary

--- csu/gmon-start.c.orig	Mon Feb 25 01:10:03 2002
+++ csu/gmon-start.c	Wed Feb 13 17:08:05 2002
@@ -1,5 +1,5 @@
 /* Code to enable profiling at program startup.
-   Copyright (C) 1995, 1996, 1997, 2000, 2001 Free Software Foundation, Inc.
+   Copyright (C) 1995,1996,1997,2000,2001,2002 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -63,7 +63,11 @@
 #endif
 
   /* Start keeping profiling records.  */
+#ifdef ENTRY_POINT_DECL
+  __monstartup ((u_long) ENTRY_POINT, (u_long) &etext);
+#else
   __monstartup ((u_long) &ENTRY_POINT, (u_long) &etext);
+#endif
 
   /* Call _mcleanup before exiting; it will write out gmon.out from the
      collected data.  */



On Sat, Feb 23, 2002 at 07:10:30PM -0800, Randolph Chung wrote:
> Greetings....
> 
> I was wondering if anyone has gotten gcc profiling to work on 
> linux/ia64?
> 
> $ cat hello.c 
> int main(int argc, char **argv) { return 0; }
> $ gcc -pg -o hello hello.c
> $ ./hello
> Segmentation fault
> 
> I've tried this with the 2.96 compilers on RedHat 7.2 as well as both
> 2.96 and 3.0.4 compilers on Debian 3.0 (glibc 2.2.4 on RH, 2.2.5 on
> Debian)
> 
> Backtrace with gdb looks like this:
> 
> (gdb) bt
> #0  __mcount (frompc\x16140901064496364080, selfpcF11686018427390128)
>     at mcount.c:96
> #1  0x20000000001fdf30 in mcount () at soinit.c:56
> #2  0x40000000000008b0 in main (argc\x1073766400, argv=0x7000a1000005501)
>     at hello.c:1
> 
> mcount.c:96         toindex = *frompcindex;
> 
> (gdb) print frompcindex
> $1 = (u_short *) 0xa000000000471ce8
> 
> Any pointers would be much appreciated.
> 
> randolph
> 
> _______________________________________________
> Linux-IA64 mailing list
> Linux-IA64@linuxia64.org
> http://lists.linuxia64.org/lists/listinfo/linux-ia64

-- 
Gary Hade
IBM Linux Technology Center
503-578-4503  IBM T/L: 775-4503
garyhade@us.ibm.com
http://www.ibm.com/linux/ltc

Re: [Linux-ia64] gcc profiling broken on Linux/ia64?

[Randolph Chung]

Works great, thanks Gary!

Ben, FYI - i'll file a bug against glibc for this.

randolph


In reference to a message from Gary Hade, dated Feb 25:
> Randolph,
> I believe this problem is due to a bug in /usr/lib/gcrt1.o 
> that was fixed by recent glibc changes to csu/gmon-start.c
> (revs 1.13 and 1.14).
> 
> Hope this helps.
> 
> Gary
> 

-- 
Debian Developer <tausq@debian.org>
http://www.TauSq.org/