A modularisation + refactoring commit. vg_execontext.c has been split into

two halves: stacktrace.c, which deals with getting, traversing and printing
stack traces;  and execontext.c, which deals with storing stack traces
permanently in a way that avoids duplicates, and comparing them.

One nice outcome:  previously we were often creating ExeContexts, which live
forever, even when they were only needed temporarily.  Ie. this was a memory
leak, which has been removed.

As part of this, new headers have been created, carved off core.h and
tool.h.  Lots of function names have changed, too.

In Massif, I also changed a lot of "eip" names to "ip" to make them less
x86-specific.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@3429

include/pub_tool_stacktrace.h

@@ -0,0 +1,61 @@
+/*--------------------------------------------------------------------*/
+/*--- Stack traces: getting, traversing, printing.                 ---*/
+/*---                                            tool_stacktrace.h ---*/
+/*--------------------------------------------------------------------*/
+
+/*
+   This file is part of Valgrind, a dynamic binary instrumentation
+   framework.
+
+   Copyright (C) 2000-2005 Julian Seward
+      jseward@acm.org
+
+   This program 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 of the
+   License, or (at your option) any later version.
+
+   This program 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 this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307, USA.
+
+   The GNU General Public License is contained in the file COPYING.
+*/
+
+#ifndef __PUB_TOOL_STACKTRACE_H
+#define __PUB_TOOL_STACKTRACE_H
+
+#include "basic_types.h"
+
+// The basic stack trace type:  just an array of code addresses.
+typedef Addr* StackTrace;
+
+// Walks the stack to get instruction pointers from the top stack frames for
+// thread 'tid'.  Maximum of 'n_ips' addresses put into 'ips';  0 is the top
+// of the stack, 1 is its caller, etc.
+extern UInt VG_(get_StackTrace) ( ThreadId tid, StackTrace ips, UInt n_ips );
+
+// Apply a function to every element in the StackTrace.  The parameter 'n'
+// gives the index of the passed ip.  Doesn't go below main() unless
+// --show-below-main=yes is set.
+extern void VG_(apply_StackTrace)( void(*action)(UInt n, Addr ip),
+                                   StackTrace ips, UInt n_ips );
+
+// Print a StackTrace.
+extern void VG_(pp_StackTrace) ( StackTrace ips, UInt n_ips );
+
+// Gets and immediately prints a StackTrace.  Just a bit simpler than
+// calling VG_(get_StackTrace)() then VG_(pp_StackTrace)().
+extern void VG_(get_and_pp_StackTrace) ( ThreadId tid, UInt n_ips );
+
+#endif   // __PUB_TOOL_STACKTRACE_H
+
+/*--------------------------------------------------------------------*/
+/*--- end                                                          ---*/
+/*--------------------------------------------------------------------*/