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/basic_types.h

@@ -32,7 +32,7 @@
 #define __BASIC_TYPES_H
 
 /* ---------------------------------------------------------------------
-   Basic types
+   builtin types
    ------------------------------------------------------------------ */
 
 #include "libvex_basictypes.h"
@@ -57,6 +57,14 @@ typedef  Word                 SSizeT;     // 32             64
 
 typedef  Word                   OffT;     // 32             64
 
+/* ---------------------------------------------------------------------
+   non-builtin types
+   ------------------------------------------------------------------ */
+
+/* ThreadIds are simply indices into the VG_(threads)[] array. */
+typedef
+   UInt
+   ThreadId;
 
 /* ---------------------------------------------------------------------
    Where to send bug reports to.