2009-09-01 Loren J. Rittle <ljrittle@acm.org>

[pf3gnuchains/gcc-fork.git] / libmudflap / mf-impl.h

diff --git a/libmudflap/mf-impl.h b/libmudflap/mf-impl.h
index 6b44eda..6f0268b 100644 (file)
--- a/libmudflap/mf-impl.h
+++ b/libmudflap/mf-impl.h
@@ -1,6 +1,6 @@
 /* Implementation header for mudflap runtime library.
    Mudflap: narrow-pointer bounds-checking by tree rewriting.
-   Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2003, 2004, 2009 Free Software Foundation, Inc.
    Contributed by Frank Ch. Eigler <fche@redhat.com>
    and Graydon Hoare <graydon@redhat.com>
 
@@ -8,27 +8,22 @@ This file is part of GCC.
 
 GCC is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free
-Software Foundation; either version 2, or (at your option) any later
+Software Foundation; either version 3, or (at your option) any later
 version.
 
-In addition to the permissions in the GNU General Public License, the
-Free Software Foundation gives you unlimited permission to link the
-compiled version of this file into combinations with other programs,
-and to distribute those combinations without any restriction coming
-from the use of this file.  (The General Public License restrictions
-do apply in other respects; for example, they cover modification of
-the file, and distribution when not linked into a combine
-executable.)
-
 GCC 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 General Public License
 for more details.
 
-You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING.  If not, write to the Free
-Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301, USA.  */
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
 
 #ifndef __MF_IMPL_H
 #define __MF_IMPL_H
@@ -94,9 +89,17 @@ extern int __mf_heuristic_check (uintptr_t, uintptr_t);
 /* Type definitions. */
 /* ------------------------------------------------------------------------ */
 
-/* The mf_state type codes describe recursion and initialization order. */
+/* The mf_state type codes describe recursion and initialization order.
+
+   reentrant means we are inside a mf-runtime support routine, such as
+   __mf_register, and thus there should be no calls to any wrapped functions,
+   such as the wrapped malloc.  This indicates a bug if it occurs.
+   in_malloc means we are inside a real malloc call inside a wrapped malloc
+   call, and thus there should be no calls to any wrapped functions like the
+   wrapped mmap.  This happens on some systems due to how the system libraries
+   are constructed.  */
 
-enum __mf_state_enum { active, reentrant };
+enum __mf_state_enum { active, reentrant, in_malloc }; 
 
 /* The __mf_options structure records optional or tunable aspects of the
  mudflap library's behavior. There is a single global instance of this
@@ -126,6 +129,11 @@ struct __mf_options
   /* Print list of leaked heap objects on shutdown. */
   unsigned print_leaks;
 
+#ifdef HAVE___LIBC_FREERES
+  /* Call __libc_freeres before leak analysis. */
+  unsigned call_libc_freeres;
+#endif
+
   /* Detect reads of uninitialized objects. */
   unsigned check_initialization;
 
@@ -231,7 +239,7 @@ extern pthread_mutex_t __mf_biglock;
 #define UNLOCKTH() do {} while (0)
 #endif
 
-#if defined(LIBMUDFLAPTH) && !defined(HAVE_TLS)
+#if defined(LIBMUDFLAPTH) && (!defined(HAVE_TLS) || defined(USE_EMUTLS))
 extern enum __mf_state_enum __mf_get_state (void);
 extern void __mf_set_state (enum __mf_state_enum);
 #else
@@ -379,11 +387,23 @@ ret __mfwrap_ ## fname (__VA_ARGS__)
     __mf_reentrancy ++; \
     return CALL_REAL(fname, __VA_ARGS__);   \
   }                                         \
+  else if (UNLIKELY (__mf_get_state () == in_malloc))   \
+  {                                         \
+    return CALL_REAL(fname, __VA_ARGS__);   \
+  }                                         \
   else                                      \
   {                                         \
     TRACE ("%s\n", __PRETTY_FUNCTION__); \
   }
 
+/* There is an assumption here that these will only be called in routines
+   that call BEGIN_PROTECT at the start, and hence the state must always
+   be active when BEGIN_MALLOC_PROTECT is called.  */
+#define BEGIN_MALLOC_PROTECT() \
+  __mf_set_state (in_malloc)
+
+#define END_MALLOC_PROTECT() \
+  __mf_set_state (active)
 
 /* Unlocked variants of main entry points from mf-runtime.h.  */
 extern void __mfu_check (void *ptr, size_t sz, int type, const char *location);