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hg_wordset.c
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hg_wordset.c
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/*--------------------------------------------------------------------*/
/*--- Sets of words, with unique set identifiers. ---*/
/*--- hg_wordset.c ---*/
/*--------------------------------------------------------------------*/
/*
This file is part of Helgrind, a Valgrind tool for detecting errors
in threaded programs.
Copyright (C) 2007-2008 OpenWorks LLP
info@open-works.co.uk
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.
Neither the names of the U.S. Department of Energy nor the
University of California nor the names of its contributors may be
used to endorse or promote products derived from this software
without prior written permission.
*/
#include "pub_tool_basics.h"
#include "pub_tool_libcassert.h"
#include "pub_tool_libcbase.h"
#include "pub_tool_libcprint.h"
#define HG_(str) VGAPPEND(vgHelgrind_,str)
#include "hg_debugonly.h"
#include "hg_wordfm.h"
#include "hg_wordset.h"
//------------------------------------------------------------------//
//--- Word Cache ---//
//------------------------------------------------------------------//
typedef
struct { UWord arg1; UWord arg2; UWord res; }
WCacheEnt;
/* Each cache is a fixed sized array of N_WCACHE_STAT_MAX entries.
However only the first .dynMax are used. This is because at some
point, expanding the cache further overall gives a slowdown because
searching more entries more than negates any performance advantage
from caching those entries in the first place. Hence use .dynMax
to allow the size of the cache(s) to be set differently for each
different WordSetU. */
#define N_WCACHE_STAT_MAX 64
typedef
struct {
WCacheEnt ent[N_WCACHE_STAT_MAX];
UWord dynMax; /* 1 .. N_WCACHE_STAT_MAX inclusive */
UWord inUse; /* 0 .. dynMax inclusive */
}
WCache;
#define WCache_INIT(_zzcache,_zzdynmax) \
do { \
tl_assert((_zzdynmax) >= 1); \
tl_assert((_zzdynmax) <= N_WCACHE_STAT_MAX); \
(_zzcache).dynMax = (_zzdynmax); \
(_zzcache).inUse = 0; \
} while (0)
#define WCache_INVAL(_zzcache) \
do { \
(_zzcache).inUse = 0; \
} while (0)
#define WCache_LOOKUP_AND_RETURN(_retty,_zzcache,_zzarg1,_zzarg2) \
do { \
UWord _i; \
UWord _arg1 = (UWord)(_zzarg1); \
UWord _arg2 = (UWord)(_zzarg2); \
WCache* _cache = &(_zzcache); \
tl_assert(_cache->dynMax >= 1); \
tl_assert(_cache->dynMax <= N_WCACHE_STAT_MAX); \
tl_assert(_cache->inUse >= 0); \
tl_assert(_cache->inUse <= _cache->dynMax); \
if (_cache->inUse > 0) { \
if (_cache->ent[0].arg1 == _arg1 \
&& _cache->ent[0].arg2 == _arg2) \
return (_retty)_cache->ent[0].res; \
for (_i = 1; _i < _cache->inUse; _i++) { \
if (_cache->ent[_i].arg1 == _arg1 \
&& _cache->ent[_i].arg2 == _arg2) { \
WCacheEnt tmp = _cache->ent[_i-1]; \
_cache->ent[_i-1] = _cache->ent[_i]; \
_cache->ent[_i] = tmp; \
return (_retty)_cache->ent[_i-1].res; \
} \
} \
} \
} while (0)
#define WCache_UPDATE(_zzcache,_zzarg1,_zzarg2,_zzresult) \
do { \
Word _i; \
UWord _arg1 = (UWord)(_zzarg1); \
UWord _arg2 = (UWord)(_zzarg2); \
UWord _res = (UWord)(_zzresult); \
WCache* _cache = &(_zzcache); \
tl_assert(_cache->dynMax >= 1); \
tl_assert(_cache->dynMax <= N_WCACHE_STAT_MAX); \
tl_assert(_cache->inUse >= 0); \
tl_assert(_cache->inUse <= _cache->dynMax); \
if (_cache->inUse < _cache->dynMax) \
_cache->inUse++; \
for (_i = _cache->inUse-1; _i >= 1; _i--) \
_cache->ent[_i] = _cache->ent[_i-1]; \
_cache->ent[0].arg1 = _arg1; \
_cache->ent[0].arg2 = _arg2; \
_cache->ent[0].res = _res; \
} while (0)
//------------------------------------------------------------------//
//--- WordSet ---//
//--- Implementation ---//
//------------------------------------------------------------------//
#define TEMPLATE_WORDVEC(SIZE) struct {\
UInt size; /* Really this should be SizeT */\
UInt refcount;\
DEBUG_ONLY(WordSetU* owner); /* for sanity checking */\
UWord words[SIZE];\
}
typedef TEMPLATE_WORDVEC() WordVec;
#define N_RECYCLE_CACHE_MAX 256
/* ix2vec[0 .. ix2vec_used-1] are pointers to the lock sets (WordVecs)
really. vec2ix is the inverse mapping, mapping WordVec* to the
corresponding ix2vec entry number. The two mappings are mutually
redundant. */
struct _WordSetU {
void* (*alloc)(SizeT);
void (*dealloc)(void*);
WordFM* vec2ix; /* WordVec-to-WordSet mapping tree */
WordVec** ix2vec; /* WordSet-to-WordVec mapping array */
UWord ix2vec_size;
UWord ix2vec_used;
WordSet empty; /* cached, for speed */
/* Caches for some operations */
WCache cache_addTo;
WCache cache_delFrom;
WCache cache_intersect;
WCache cache_minus;
/* recycle cache */
UWord recycle_cache[N_RECYCLE_CACHE_MAX];
UInt recycle_cache_n;
/* Stats */
UWord n_add;
UWord n_add_uncached;
UWord n_del;
UWord n_del_uncached;
UWord n_union;
UWord n_intersect;
UWord n_intersect_uncached;
UWord n_minus;
UWord n_minus_uncached;
UWord n_elem;
UWord n_doubleton;
UWord n_isEmpty;
UWord n_isSingleton;
UWord n_isSorE;
UWord n_anyElementOf;
UWord n_elementOf;
UWord n_isSubsetOf;
UWord n_recycle;
};
/* Create a new WordVec of the given size. The WordVec and the array
of UWord its .words field points at, are allocated in the same
piece of memory, so as to reduce allocator overheads. We have to
be careful to ensure that the pointed-to array is suitably aligned,
but that should be OK since WordVec has a size of 3 machine words.
To be on the safe side this is asserted for. */
static WordVec* new_WV_of_size ( WordSetU* wsu, UInt sz )
{
HChar* allocated_mem;
WordVec* wv;
tl_assert(sz >= 0);
tl_assert(0 == (sizeof(WordVec) % sizeof(UWord)));
allocated_mem = wsu->alloc( sizeof(WordVec) + (SizeT)sz * sizeof(UWord));
wv = (WordVec*) allocated_mem;
DEBUG_ONLY(wv->owner = wsu);
wv->size = sz;
wv->refcount = 0;
tl_assert(0 == (UWord)(wv->words) % sizeof(UWord));
return wv;
}
static Word cmp_WordVecs_for_FM ( UWord wv1W, UWord wv2W )
{
UWord i;
WordVec* wv1 = (WordVec*)wv1W;
WordVec* wv2 = (WordVec*)wv2W;
UWord common = wv1->size < wv2->size ? wv1->size : wv2->size;
for (i = 0; i < common; i++) {
if (wv1->words[i] == wv2->words[i])
continue;
if (wv1->words[i] < wv2->words[i])
return -1;
if (wv1->words[i] > wv2->words[i])
return 1;
tl_assert(0);
}
/* Ok, the common sections are identical. So now consider the
tails. Both sets are considered to finish in an implied
sequence of -infinity. */
if (wv1->size < wv2->size) {
tl_assert(common == wv1->size);
return -1; /* impliedly, wv1 contains some -infinitys in places
where wv2 doesn't. */
}
if (wv1->size > wv2->size) {
tl_assert(common == wv2->size);
return 1;
}
tl_assert(common == wv1->size);
return 0; /* identical */
}
static void ensure_ix2vec_space ( WordSetU* wsu )
{
UInt i, new_sz;
WordVec** new_vec;
tl_assert(wsu->ix2vec_used <= wsu->ix2vec_size);
if (wsu->ix2vec_used < wsu->ix2vec_size)
return;
new_sz = 2 * wsu->ix2vec_size;
if (new_sz == 0) new_sz = 2;
new_vec = wsu->alloc( new_sz * sizeof(WordVec*) );
tl_assert(new_vec);
for (i = 0; i < wsu->ix2vec_size; i++)
new_vec[i] = wsu->ix2vec[i];
if (wsu->ix2vec)
wsu->dealloc(wsu->ix2vec);
wsu->ix2vec = new_vec;
wsu->ix2vec_size = new_sz;
}
/* Index into a WordSetU, doing the obvious range check. Failure of
the assertions marked XXX and YYY is an indication of passing the
wrong WordSetU* in the public API of this module. */
static inline WordVec* do_ix2vec ( WordSetU* wsu, WordSet ws )
{
WordVec* wv;
tl_assert(wsu->ix2vec_used <= wsu->ix2vec_size);
if (wsu->ix2vec_used > 0)
tl_assert(wsu->ix2vec);
/* If this assertion fails, it may mean you supplied a 'ws'
that does not come from the 'wsu' universe. */
tl_assert(ws < wsu->ix2vec_used); /* XXX */
wv = wsu->ix2vec[ws];
/* Make absolutely sure that 'ws' is a member of 'wsu'. */
tl_assert(wv);
tl_debug_assert(wv->owner == wsu); /* YYY */
return wv;
}
/* See if wv is contained within wsu. If so, deallocate wv and return
the index of the already-present copy. If not, add wv to both the
vec2ix and ix2vec mappings and return its index.
*/
static WordSet add_or_dealloc_WordVec( WordSetU* wsu, WordVec* wv_new )
{
Bool have;
WordVec* wv_old;
UWord/*Set*/ ix_old = -1;
/* Really WordSet, but need something that can safely be casted to
a Word* in the lookupFM. Making it WordSet (which is 32 bits)
causes failures on a 64-bit platform. */
tl_debug_assert(wv_new->owner == wsu);
have = HG_(lookupFM)( wsu->vec2ix,
(Word*)&wv_old, (Word*)&ix_old,
(Word)wv_new );
if (have) {
tl_assert(wv_old != wv_new);
tl_assert(wv_old);
tl_debug_assert(wv_old->owner == wsu);
tl_assert(ix_old < wsu->ix2vec_used);
tl_assert(wsu->ix2vec[ix_old] == wv_old);
wsu->dealloc( wv_new );
return (WordSet)ix_old;
} else {
ensure_ix2vec_space( wsu );
tl_assert(wsu->ix2vec);
tl_assert(wsu->ix2vec_used < wsu->ix2vec_size);
wsu->ix2vec[wsu->ix2vec_used] = wv_new;
HG_(addToFM)( wsu->vec2ix, (Word)wv_new, (Word)wsu->ix2vec_used );
if (0) VG_(printf)("aodW %d\n", (Int)wsu->ix2vec_used );
wsu->ix2vec_used++;
tl_assert(wsu->ix2vec_used <= wsu->ix2vec_size);
return (WordSet)(wsu->ix2vec_used - 1);
}
}
// Similar to add_or_dealloc_WordVec, but different allocation policy:
// If wv_new is already in wsu, just return it's index and do not deallocate.
// Else allocate new WordVec, and copy wv_new there.
static WordSet find_or_alloc_and_add_WordVec( WordSetU* wsu, WordVec* wv_new )
{
Bool have;
WordVec* wv_old;
UWord/*Set*/ ix_old = -1;
tl_debug_assert(wv_new->owner == wsu);
have = HG_(lookupFM)( wsu->vec2ix,
(Word*)&wv_old, (Word*)&ix_old,
(Word)wv_new );
if (have) {
tl_assert(wv_old != wv_new);
tl_assert(wv_old);
tl_debug_assert(wv_old->owner == wsu);
tl_assert(ix_old < wsu->ix2vec_used);
tl_assert(wsu->ix2vec[ix_old] == wv_old);
return (WordSet)ix_old;
} else {
// allocate new WordVec and copy contents from wv_new.
WordVec *wv_tmp = new_WV_of_size( wsu, wv_new->size );
UInt i;
for (i = 0; i < wv_new->size; i++) {
wv_tmp->words[i] = wv_new->words[i];
}
wv_new = wv_tmp;
ensure_ix2vec_space( wsu );
tl_assert(wsu->ix2vec);
tl_assert(wsu->ix2vec_used < wsu->ix2vec_size);
wsu->ix2vec[wsu->ix2vec_used] = wv_new;
HG_(addToFM)( wsu->vec2ix, (Word)wv_new, (Word)wsu->ix2vec_used );
if (0) VG_(printf)("aodW %d\n", (Int)wsu->ix2vec_used );
wsu->ix2vec_used++;
tl_assert(wsu->ix2vec_used <= wsu->ix2vec_size);
return (WordSet)(wsu->ix2vec_used - 1);
}
}
WordSetU* HG_(newWordSetU) ( void* (*alloc_nofail)( SizeT ),
void (*dealloc)(void*),
Word cacheSize )
{
WordSetU* wsu;
WordVec* empty;
wsu = alloc_nofail( sizeof(WordSetU) );
VG_(memset)( wsu, 0, sizeof(WordSetU) );
wsu->alloc = alloc_nofail;
wsu->dealloc = dealloc;
wsu->vec2ix = HG_(newFM)( alloc_nofail, dealloc, cmp_WordVecs_for_FM );
wsu->ix2vec_used = 0;
wsu->ix2vec_size = 0;
wsu->ix2vec = NULL;
WCache_INIT(wsu->cache_addTo, cacheSize);
WCache_INIT(wsu->cache_delFrom, cacheSize);
WCache_INIT(wsu->cache_intersect, cacheSize);
WCache_INIT(wsu->cache_minus, cacheSize);
empty = new_WV_of_size( wsu, 0 );
wsu->empty = add_or_dealloc_WordVec( wsu, empty );
return wsu;
}
void HG_(deleteWordSetU) ( WordSetU* wsu )
{
WordVec* wv = NULL;
void (*dealloc)(void*) = wsu->dealloc;
tl_assert(wsu->vec2ix);
// Iterate over "wsu->vec2ix" FM and call "delete_WV_for_FM" for KEYS
// delete_WV_for_FM(wv) = { wv->owner->dealloc(wv) } = { wsu->dealloc(wv) }
HG_(initIterAtFM)(wsu->vec2ix, 0);
while (HG_(nextIterFM)(wsu->vec2ix, (Word*)&wv /*key*/, NULL /*val*/)) {
dealloc((WordVec*)wv);
}
HG_(doneIterFM) (wsu->vec2ix);
HG_(deleteFM)( wsu->vec2ix,
NULL /*key-finalizer*/,
NULL /*val-finalizer*/ );
if (wsu->ix2vec)
dealloc(wsu->ix2vec);
dealloc(wsu);
}
WordSet HG_(emptyWS) ( WordSetU* wsu )
{
return wsu->empty;
}
Bool HG_(isEmptyWS) ( WordSetU* wsu, WordSet ws )
{
WordVec* wv = do_ix2vec( wsu, ws );
wsu->n_isEmpty++;
if (wv->size == 0) {
tl_assert(ws == wsu->empty);
return True;
} else {
tl_assert(ws != wsu->empty);
return False;
}
}
Bool HG_(isSingletonWS) ( WordSetU* wsu, WordSet ws, UWord w )
{
WordVec* wv;
tl_assert(wsu);
wsu->n_isSingleton++;
wv = do_ix2vec( wsu, ws );
return (Bool)(wv->size == 1 && wv->words[0] == w);
}
Bool HG_(isSingletonOrEmptyWS) ( WordSetU* wsu, WordSet ws, UWord w )
{
WordVec* wv;
tl_assert(wsu);
wsu->n_isSorE++;
wv = do_ix2vec( wsu, ws );
if (wv->size == 0) return True;
return (Bool)(wv->size == 1 && wv->words[0] == w);
}
UWord HG_(cardinalityWS) ( WordSetU* wsu, WordSet ws )
{
WordVec* wv;
tl_assert(wsu);
wv = do_ix2vec( wsu, ws );
tl_assert(wv->size >= 0);
return wv->size;
}
UWord HG_(anyElementOfWS) ( WordSetU* wsu, WordSet ws )
{
WordVec* wv;
tl_assert(wsu);
wsu->n_anyElementOf++;
wv = do_ix2vec( wsu, ws );
tl_assert(wv->size >= 1);
return wv->words[0];
}
UWord HG_(cardinalityWSU) ( WordSetU* wsu )
{
tl_assert(wsu);
return wsu->ix2vec_used;
}
UWord HG_(memoryConsumedWSU) ( WordSetU* wsu, UWord* count )
{
UWord i, n = 0, ret = 0;
for (i = 0; i < HG_(cardinalityWSU)(wsu); i++) {
if (!HG_(saneWS_SLOW(wsu, i)))
continue;
n++;
ret += sizeof(Word) * HG_(cardinalityWS)(wsu, i) + sizeof(WordVec);
}
if (count != NULL)
*count = n;
return ret;
}
void HG_(getPayloadWS) ( /*OUT*/UWord** words, /*OUT*/UWord* nWords,
WordSetU* wsu, WordSet ws )
{
WordVec* wv;
tl_assert(wsu);
wv = do_ix2vec( wsu, ws );
tl_assert(wv->size >= 0);
*nWords = wv->size;
*words = wv->words;
}
/*
WordSet Recycling.
Once HG_(recycleWS) is called on a ws,
the memory allocated for ws is freed and ws is removed from vec2ix.
The slot wsu->ix2vec[ws] is assigned NULL and remains NULL forever.
We also have to flush cashes (otherwise if the user creates a new set
equal to the recycled one, cache may return the index of the recycled ws).
We maintain a cache os WordSets to recycle and do recycling
every N_RECYCLE_CACHE_MAX call to HG_(recycleWS).
This is done to minimize the number of addTo/delFrom/etc cache invals.
Possible improvement to this scheme:
- Do not call deleteWV, instead maintain our own free list (?).
- Recycle the slot wsu->ix2vec[ws] (will complicate sanity checking).
*/
void HG_(recycleWS) ( WordSetU *wsu, WordSet ws);
void HG_(recycleWS) ( WordSetU *wsu, WordSet ws)
{
tl_assert(wsu);
if (wsu->recycle_cache_n == N_RECYCLE_CACHE_MAX) {
// cache is full, do the recycling
UInt i;
for (i = 0; i < wsu->recycle_cache_n; i++) {
WordSet ws_to_recycle = wsu->recycle_cache[i];
if (wsu->ix2vec[ws_to_recycle] == NULL)
continue;
WordVec *wv = do_ix2vec( wsu, ws_to_recycle );
tl_assert(wv->size >= 0);
if (wv->refcount > 0)
continue;
tl_assert(wv->refcount == 0);
HG_(delFromFM)(wsu->vec2ix, NULL, NULL, (Word)wv);
wsu->dealloc(wv);
wsu->ix2vec[ws_to_recycle] = NULL;
wsu->n_recycle++;
}
WCache_INVAL(wsu->cache_addTo);
WCache_INVAL(wsu->cache_delFrom);
WCache_INVAL(wsu->cache_intersect);
WCache_INVAL(wsu->cache_minus);
wsu->recycle_cache_n = 0;
}
tl_assert(wsu->recycle_cache_n < N_RECYCLE_CACHE_MAX);
wsu->recycle_cache[wsu->recycle_cache_n++] = ws;
}
// Increment the refcount of ws by sz.
void HG_(refWS) ( WordSetU *wsu, WordSet ws, UInt sz)
{
WordVec* wv;
tl_assert(wsu);
wv = do_ix2vec( wsu, ws );
tl_assert(wv->size >= 0);
wv->refcount += sz;
}
// Decrement the refcount of ws by sz and return the new refcount value.
UInt HG_(unrefWS) ( WordSetU *wsu, WordSet ws, UInt sz)
{
WordVec* wv;
UInt rc;
tl_assert(wsu);
wv = do_ix2vec( wsu, ws );
tl_assert(wv->size >= 0);
tl_assert(wv->refcount >= sz);
wv->refcount -= sz;
rc = wv->refcount;
if (rc == 0)
HG_(recycleWS)(wsu, ws);
// wv may not be present already
return rc;
}
// Get the current refcount of ws.
UWord HG_(getRefWS) ( WordSetU *wsu, WordSet ws)
{
WordVec* wv;
tl_assert(wsu);
wv = do_ix2vec( wsu, ws );
tl_assert(wv->size >= 0);
return wv->refcount;
}
Bool HG_(plausibleWS) ( WordSetU* wsu, WordSet ws )
{
if (wsu == NULL) return False;
if (ws < 0 || ws >= wsu->ix2vec_used)
return False;
return True;
}
Bool HG_(saneWS_SLOW) ( WordSetU* wsu, WordSet ws )
{
WordVec* wv;
DEBUG_ONLY(UWord i);
if (wsu == NULL) return False;
if (ws < 0 || ws >= wsu->ix2vec_used)
return False;
if (wsu->ix2vec_used > wsu->ix2vec_size)
return False;
if (wsu->ix2vec_used > 0)
if (!wsu->ix2vec)
return False;
if ((ws >= wsu->ix2vec_used))
return False;
wv = wsu->ix2vec[ws];
if (!wv)
return False;
DEBUG_ONLY(
if (wv->owner != wsu)
return False
if (wv->size < 0)
return False;
if (wv->size > 0) {
for (i = 0; i < wv->size-1; i++) {
if (wv->words[i] >= wv->words[i+1])
return False;
}
}
);
return True;
}
Bool HG_(elemWS) ( WordSetU* wsu, WordSet ws, UWord w )
{
UWord i;
WordVec* wv = do_ix2vec( wsu, ws );
wsu->n_elem++;
for (i = 0; i < wv->size; i++) {
if (wv->words[i] == w)
return True;
}
return False;
}
WordSet HG_(doubletonWS) ( WordSetU* wsu, UWord w1, UWord w2 )
{
TEMPLATE_WORDVEC(2) temp;
WordVec *wv = (WordVec*)&temp;
DEBUG_ONLY(wv->owner = wsu);
wv->size = 2;
wsu->n_doubleton++;
if (w1 == w2) {
wv->size = 1;
wv->words[0] = w1;
}
else if (w1 < w2) {
wv->words[0] = w1;
wv->words[1] = w2;
}
else {
tl_assert(w1 > w2);
wv->words[0] = w2;
wv->words[1] = w1;
}
return find_or_alloc_and_add_WordVec( wsu, wv );
}
WordSet HG_(singletonWS) ( WordSetU* wsu, UWord w )
{
return HG_(doubletonWS)( wsu, w, w );
}
WordSet HG_(isSubsetOf) ( WordSetU* wsu, WordSet small, WordSet big )
{
wsu->n_isSubsetOf++;
return small == HG_(intersectWS)( wsu, small, big );
}
void HG_(ppWS) ( WordSetU* wsu, WordSet ws )
{
UWord i;
WordVec* wv;
tl_assert(wsu);
wv = do_ix2vec( wsu, ws );
VG_(printf)("[refc = %d] {", wv->refcount);
for (i = 0; i < wv->size; i++) {
VG_(printf)("%p", (void*)wv->words[i]);
if (i < wv->size-1)
VG_(printf)(",");
}
VG_(printf)("}");
}
void HG_(ppWSUstats) ( WordSetU* wsu, HChar* name )
{
Int i;
Int d_size = 10;
Int size_distribution[10] = {0,0,0,0,0,0,0,0,0,0};
VG_(printf)(" WordSet \"%s\":\n", name);
VG_(printf)(" addTo %,10u (%,u uncached)\n",
wsu->n_add, wsu->n_add_uncached);
VG_(printf)(" delFrom %,10u (%,u uncached)\n",
wsu->n_del, wsu->n_del_uncached);
VG_(printf)(" union %,10u\n", wsu->n_union);
VG_(printf)(" intersect %,10u (%u uncached) [nb. incl isSubsetOf]\n",
wsu->n_intersect, wsu->n_intersect_uncached);
VG_(printf)(" minus %,10u (%u uncached)\n",
wsu->n_minus, wsu->n_minus_uncached);
VG_(printf)(" elem %,10u\n", wsu->n_elem);
VG_(printf)(" doubleton %,10u\n", wsu->n_doubleton);
VG_(printf)(" isEmpty %,10u\n", wsu->n_isEmpty);
VG_(printf)(" isSingleton %,10u\n", wsu->n_isSingleton);
VG_(printf)(" isSorEmpty %,10u\n", wsu->n_isSorE);
VG_(printf)(" anyElementOf %,10u\n", wsu->n_anyElementOf);
VG_(printf)(" elementOf %,10u\n", wsu->n_elementOf);
VG_(printf)(" isSubsetOf %,10u\n", wsu->n_isSubsetOf);
VG_(printf)(" cardinality %,10u\n", (int)HG_(cardinalityWSU)(wsu));
VG_(printf)(" recycle %,10u\n", wsu->n_recycle);
// compute and print size distributions
for (i = 0; i < (Int)HG_(cardinalityWSU)(wsu); i++) {
if (!HG_(saneWS_SLOW(wsu, i))) continue;
WordVec *wv = do_ix2vec( wsu, i );
Int size = wv->size;
if (size >= d_size) size = d_size-1;
size_distribution[size]++;
}
tl_assert(size_distribution[0] == 1);
for (i = 1; i < d_size; i++) {
if (size_distribution[i] == 0) continue;
if(i == d_size-1)
VG_(printf)(" size[>=%d] %10d\n", i, size_distribution[i]);
else
VG_(printf)(" size[%d] %10d\n", i, size_distribution[i]);
}
}
WordSet HG_(addToWS) ( WordSetU* wsu, WordSet ws, UWord w )
{
UWord k, j;
WordVec* wv = do_ix2vec( wsu, ws );
TEMPLATE_WORDVEC(wv->size + 1) temp; // temp.words = C99 array
WordVec *wv_new = (WordVec*)&temp;
WordSet result = (WordSet)(-1); /* bogus */
wv_new->size = wv->size + 1;
DEBUG_ONLY(wv_new->owner = wsu);
wsu->n_add++;
WCache_LOOKUP_AND_RETURN(WordSet, wsu->cache_addTo, ws, w);
wsu->n_add_uncached++;
/* If already present, this is a no-op. */
for (k = 0; k < wv->size; k++) {
if (wv->words[k] == w) {
result = ws;
goto out;
}
}
/* Ok, not present. Build a new one ... */
k = j = 0;
for (; k < wv->size && wv->words[k] < w; k++) {
wv_new->words[j++] = wv->words[k];
}
wv_new->words[j++] = w;
for (; k < wv->size; k++) {
tl_assert(wv->words[k] > w);
wv_new->words[j++] = wv->words[k];
}
tl_assert(j == wv_new->size);
/* Find any existing copy, or add the new one. */
result = find_or_alloc_and_add_WordVec(wsu, wv_new);
tl_assert(result != (WordSet)(-1));
out:
WCache_UPDATE(wsu->cache_addTo, ws, w, result);
return result;
}
WordSet HG_(delFromWS) ( WordSetU* wsu, WordSet ws, UWord w )
{
UWord i, j, k;
WordVec* wv = do_ix2vec( wsu, ws );
// BHL lockset may produce HG_(delFromWS) calls with wv->size == 0.
// max_0_size = max(0, (Word)wv->size - 1)
UWord max_0_size = (wv->size > 0) ? (wv->size - 1) : 0;
TEMPLATE_WORDVEC(max_0_size) temp; // temp.words = C99 array
WordVec *wv_new = (WordVec*)&temp;
WordSet result = (WordSet)(-1); /* bogus */
wv_new->size = wv->size - 1;
DEBUG_ONLY(wv_new->owner = wsu);
wsu->n_del++;
/* special case empty set */
if (wv->size == 0) {
tl_assert(ws == wsu->empty);
return ws;
}
WCache_LOOKUP_AND_RETURN(WordSet, wsu->cache_delFrom, ws, w);
wsu->n_del_uncached++;
/* If not already present, this is a no-op. */
for (i = 0; i < wv->size; i++) {
if (wv->words[i] == w)
break;
}
if (i == wv->size) {
result = ws;
goto out;
}
/* So w is present in ws, and the new set will be one element
smaller. */
tl_assert(i >= 0 && i < wv->size);
tl_assert(wv->size > 0);
j = k = 0;
for (; j < wv->size; j++) {
if (j == i)
continue;
wv_new->words[k++] = wv->words[j];
}
tl_assert(k == wv_new->size);
result = find_or_alloc_and_add_WordVec(wsu, wv_new);
if (wv->size == 1) {
tl_assert(result == wsu->empty);
}
out:
WCache_UPDATE(wsu->cache_delFrom, ws, w, result);
return result;
}
WordSet HG_(unionWS) ( WordSetU* wsu, WordSet ws1, WordSet ws2 )
{
UWord i1, i2, k, sz;
WordVec* wv_new;
WordVec* wv1 = do_ix2vec( wsu, ws1 );
WordVec* wv2 = do_ix2vec( wsu, ws2 );
wsu->n_union++;
sz = 0;
i1 = i2 = 0;
while (1) {
if (i1 >= wv1->size || i2 >= wv2->size)
break;
sz++;
if (wv1->words[i1] < wv2->words[i2]) {
i1++;
} else
if (wv1->words[i1] > wv2->words[i2]) {
i2++;
} else {
i1++;
i2++;
}
}
tl_assert(i1 <= wv1->size);
tl_assert(i2 <= wv2->size);
tl_assert(i1 == wv1->size || i2 == wv2->size);
if (i1 == wv1->size && i2 < wv2->size) {
sz += (wv2->size - i2);
}
if (i2 == wv2->size && i1 < wv1->size) {
sz += (wv1->size - i1);
}
wv_new = new_WV_of_size( wsu, sz );
k = 0;
i1 = i2 = 0;
while (1) {
if (i1 >= wv1->size || i2 >= wv2->size)
break;
if (wv1->words[i1] < wv2->words[i2]) {
wv_new->words[k++] = wv1->words[i1];
i1++;
} else
if (wv1->words[i1] > wv2->words[i2]) {
wv_new->words[k++] = wv2->words[i2];
i2++;
} else {
wv_new->words[k++] = wv1->words[i1];
i1++;
i2++;
}
}
tl_assert(i1 <= wv1->size);
tl_assert(i2 <= wv2->size);
tl_assert(i1 == wv1->size || i2 == wv2->size);
if (i1 == wv1->size && i2 < wv2->size) {
while (i2 < wv2->size)
wv_new->words[k++] = wv2->words[i2++];
}
if (i2 == wv2->size && i1 < wv1->size) {
while (i1 < wv1->size)
wv_new->words[k++] = wv1->words[i1++];
}
tl_assert(k == sz);
return add_or_dealloc_WordVec( wsu, wv_new );
}
WordSet HG_(intersectWS) ( WordSetU* wsu, WordSet ws1, WordSet ws2 )
{
UWord i1, i2, k, sz;
WordSet ws_new = (WordSet)(-1); /* bogus */
WordVec* wv_new;
WordVec* wv1;
WordVec* wv2;
wsu->n_intersect++;
/* Deal with an obvious case fast. */
if (ws1 == ws2)
return ws1;
/* Since intersect(x,y) == intersect(y,x), convert both variants to
the same query. This reduces the number of variants the cache
has to deal with. */
if (ws1 > ws2) {
WordSet wst = ws1; ws1 = ws2; ws2 = wst;
}
WCache_LOOKUP_AND_RETURN(WordSet, wsu->cache_intersect, ws1, ws2);
wsu->n_intersect_uncached++;
wv1 = do_ix2vec( wsu, ws1 );
wv2 = do_ix2vec( wsu, ws2 );
sz = 0;
i1 = i2 = 0;
while (1) {
if (i1 >= wv1->size || i2 >= wv2->size)
break;
if (wv1->words[i1] < wv2->words[i2]) {
i1++;
} else
if (wv1->words[i1] > wv2->words[i2]) {
i2++;
} else {
sz++;
i1++;
i2++;
}
}
tl_assert(i1 <= wv1->size);
tl_assert(i2 <= wv2->size);
tl_assert(i1 == wv1->size || i2 == wv2->size);
wv_new = new_WV_of_size( wsu, sz );
k = 0;
i1 = i2 = 0;
while (1) {
if (i1 >= wv1->size || i2 >= wv2->size)
break;
if (wv1->words[i1] < wv2->words[i2]) {
i1++;
} else
if (wv1->words[i1] > wv2->words[i2]) {
i2++;
} else {
wv_new->words[k++] = wv1->words[i1];
i1++;
i2++;
}
}
tl_assert(i1 <= wv1->size);
tl_assert(i2 <= wv2->size);
tl_assert(i1 == wv1->size || i2 == wv2->size);
tl_assert(k == sz);
ws_new = add_or_dealloc_WordVec( wsu, wv_new );
if (sz == 0) {
tl_assert(ws_new == wsu->empty);
}
tl_assert(ws_new != (WordSet)(-1));
WCache_UPDATE(wsu->cache_intersect, ws1, ws2, ws_new);
return ws_new;
}
WordSet HG_(minusWS) ( WordSetU* wsu, WordSet ws1, WordSet ws2 )
{
UWord i1, i2, k, sz;
WordSet ws_new = (WordSet)(-1); /* bogus */
WordVec* wv_new;
WordVec* wv1;
WordVec* wv2;
wsu->n_minus++;
WCache_LOOKUP_AND_RETURN(WordSet, wsu->cache_minus, ws1, ws2);
wsu->n_minus_uncached++;
wv1 = do_ix2vec( wsu, ws1 );
wv2 = do_ix2vec( wsu, ws2 );
sz = 0;
i1 = i2 = 0;
while (1) {
if (i1 >= wv1->size || i2 >= wv2->size)
break;
if (wv1->words[i1] < wv2->words[i2]) {
sz++;
i1++;
} else