Kill off all support for 'gcc -pg' / 'gprof' style profiling. There is both a

size and performance penalty to profiling applications this way, as well as
Heisenberg effects, where the act of measuring changes what is measured.
There are better tools for doing profiling, such as OProfile, that do not
require gcc to instrument the application code.
 -Erik

2 files changed, 0 insertions, 80 deletions

diff --git a/libc/sysdeps/linux/common/bits/dlfcn.h b/libc/sysdeps/linux/common/bits/dlfcn.h
index e96b5c17a..75122a98a 100644
--- a/libc/sysdeps/linux/common/bits/dlfcn.h
+++ b/libc/sysdeps/linux/common/bits/dlfcn.h
@@ -40,25 +40,3 @@
 /* Do not delete object when closed.  */
 #define RTLD_NODELETE	0x01000
 
-#ifdef __USE_GNU
-/* To support profiling of shared objects it is a good idea to call
-   the function found using `dlsym' using the following macro since
-   these calls do not use the PLT.  But this would mean the dynamic
-   loader has no chance to find out when the function is called.  The
-   macro applies the necessary magic so that profiling is possible.
-   Rewrite
-	foo = (*fctp) (arg1, arg2);
-   into
-        foo = DL_CALL_FCT (fctp, (arg1, arg2));
-*/
-# define DL_CALL_FCT(fctp, args) \
-  (_dl_mcount_wrapper_check ((void *) (fctp)), (*(fctp)) args)
-
-__BEGIN_DECLS
-
-/* This function calls the profiling functions.  */
-extern void _dl_mcount_wrapper_check (void *__selfpc) __THROW;
-
-__END_DECLS
-
-#endif
diff --git a/libc/sysdeps/linux/common/bits/machine-gmon.h b/libc/sysdeps/linux/common/bits/machine-gmon.h
deleted file mode 100644
index 7dd36308b..000000000
--- a/libc/sysdeps/linux/common/bits/machine-gmon.h
+++ /dev/null
@@ -1,58 +0,0 @@
-/* Machine-dependent definitions for profiling support.  Generic GCC 2 version.
-   Copyright (C) 1996, 1997, 2000 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
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, write to the Free
-   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-   02111-1307 USA.  */
-
-/* GCC version 2 gives us a perfect magical function to get
-   just the information we need:
-     void *__builtin_return_address (unsigned int N)
-   returns the return address of the frame N frames up.  */
-
-/* Be warned that GCC cannot usefully compile __builtin_return_address(N)
-   for N != 0 on all machines.  In this case, you may have to write
-   your own version of _mcount().  */
-
-#if __GNUC__ < 2
- #error "This file uses __builtin_return_address, a GCC 2 extension."
-#endif
-
-#include <sysdep.h>
-#ifndef NO_UNDERSCORES
-/* The asm symbols for C functions are `_function'.
-   The canonical name for the counter function is `mcount', no _.  */
-void _mcount (void) asm ("mcount");
-#else
-/* The canonical name for the function is `_mcount' in both C and asm,
-   but some old asm code might assume it's `mcount'.  */
-void _mcount (void);
-weak_alias (_mcount, mcount)
-#endif
-
-static void mcount_internal (u_long frompc, u_long selfpc);
-
-#define _MCOUNT_DECL(frompc, selfpc) \
-static inline void mcount_internal (u_long frompc, u_long selfpc)
-
-#ifndef RETURN_ADDRESS
-#define RETURN_ADDRESS(n) __builtin_return_address(n)
-#endif
-
-#define MCOUNT \
-void _mcount (void)							      \
-{									      \
-  mcount_internal ((u_long) RETURN_ADDRESS (1), (u_long) RETURN_ADDRESS (0)); \
-}