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From: <sv...@va...> - 2015-06-22 13:35:47
|
Author: florian
Date: Mon Jun 22 14:35:39 2015
New Revision: 15349
Log:
Change VG_(am_get_advisory) from index into nsegments to pointers
to segments. Alsmost eliminates use of nsegments.
Modified:
branches/ASPACEM_TWEAKS/coregrind/m_aspacemgr/aspacemgr-linux.c
Modified: branches/ASPACEM_TWEAKS/coregrind/m_aspacemgr/aspacemgr-linux.c
==============================================================================
--- branches/ASPACEM_TWEAKS/coregrind/m_aspacemgr/aspacemgr-linux.c (original)
+++ branches/ASPACEM_TWEAKS/coregrind/m_aspacemgr/aspacemgr-linux.c Mon Jun 22 14:35:39 2015
@@ -1771,7 +1771,7 @@
it does not trash either any of its own mappings or any of
valgrind's mappings.
*/
- UInt i, j;
+ UInt j;
Addr startPoint = forClient ? aspacem_cStart : aspacem_vStart;
@@ -1850,66 +1850,59 @@
/* ------ Implement the Default Policy ------ */
- /* These hold indices for segments found during search, or -1 if not
- found. */
- Int floatIdx = -1;
- Int fixedIdx = -1;
+ /* These are segments found during search, or NULL if not found. */
+ const NSegment *floatSeg = NULL;
+ const NSegment *fixedSeg = NULL;
/* Don't waste time looking for a fixed match if not requested to. */
Bool fixed_not_required = req->rkind == MAny;
- i = find_nsegment_idx(startPoint);
+ const NSegment *seg = find_segment(startPoint);
/* Examine holes from index i back round to i-1. Record the
index first fixed hole and the first floating hole which would
satisfy the request. */
for (j = 0; j < nsegments_used; j++) {
- if (nsegments[i].kind != SkFree) {
- i++;
- if (i >= nsegments_used) i = 0;
- continue;
- }
-
- Addr holeStart = nsegments[i].start;
- Addr holeEnd = nsegments[i].end;
-
- /* Stay sane .. */
- aspacem_assert(holeStart <= holeEnd);
- aspacem_assert(aspacem_minAddr <= holeStart);
- aspacem_assert(holeEnd <= aspacem_maxAddr);
+ if (seg->kind == SkFree) {
+ Addr holeStart = seg->start;
+ Addr holeEnd = seg->end;
+
+ /* Stay sane .. */
+ aspacem_assert(holeStart <= holeEnd);
+ aspacem_assert(aspacem_minAddr <= holeStart);
+ aspacem_assert(holeEnd <= aspacem_maxAddr);
- /* See if it's any use to us. */
- Addr holeLen = holeEnd - holeStart + 1; // FIXME: SizeT
+ /* See if it's any use to us. */
+ Addr holeLen = holeEnd - holeStart + 1; // FIXME: SizeT
- if (fixedIdx == -1 && holeStart <= reqStart && reqEnd <= holeEnd)
- fixedIdx = i;
+ if (fixedSeg == NULL && holeStart <= reqStart && reqEnd <= holeEnd)
+ fixedSeg = seg;
- if (floatIdx == -1 && holeLen >= reqLen)
- floatIdx = i;
+ if (floatSeg == NULL && holeLen >= reqLen)
+ floatSeg = seg;
- /* Don't waste time searching once we've found what we wanted. */
- if ((fixed_not_required || fixedIdx >= 0) && floatIdx >= 0)
- break;
-
- i++;
- if (i >= nsegments_used) i = 0;
+ /* Don't waste time searching once we've found what we wanted. */
+ if ((fixed_not_required || fixedSeg != NULL) && floatSeg != NULL)
+ break;
+ }
+ seg++;
+ if (seg == nsegments + nsegments_used)
+ seg = nsegments + 0; // wrap around
}
- aspacem_assert(fixedIdx >= -1 && fixedIdx < nsegments_used);
- if (fixedIdx >= 0)
- aspacem_assert(nsegments[fixedIdx].kind == SkFree);
+ if (fixedSeg != NULL)
+ aspacem_assert(fixedSeg->kind == SkFree);
- aspacem_assert(floatIdx >= -1 && floatIdx < nsegments_used);
- if (floatIdx >= 0)
- aspacem_assert(nsegments[floatIdx].kind == SkFree);
+ if (floatSeg != NULL)
+ aspacem_assert(floatSeg->kind == SkFree);
AM_SANITY_CHECK();
/* Now see if we found anything which can satisfy the request. */
switch (req->rkind) {
case MFixed:
- if (fixedIdx >= 0) {
+ if (fixedSeg != NULL) {
*ok = True;
return req->start;
} else {
@@ -1918,20 +1911,20 @@
}
break;
case MHint:
- if (fixedIdx >= 0) {
+ if (fixedSeg != NULL) {
*ok = True;
return req->start;
}
- if (floatIdx >= 0) {
+ if (floatSeg != NULL) {
*ok = True;
- return nsegments[floatIdx].start;
+ return floatSeg->start;
}
*ok = False;
return 0;
case MAny:
- if (floatIdx >= 0) {
+ if (floatSeg != NULL) {
*ok = True;
- return nsegments[floatIdx].start;
+ return floatSeg->start;
}
*ok = False;
return 0;
|
|
From: <sv...@va...> - 2015-06-22 11:53:57
|
Author: florian
Date: Mon Jun 22 12:53:48 2015
New Revision: 3155
Log:
Fix a few undefined shift operations as spotted by ubsan.
Modified:
trunk/priv/host_ppc_isel.c
trunk/priv/host_tilegx_isel.c
Modified: trunk/priv/host_ppc_isel.c
==============================================================================
--- trunk/priv/host_ppc_isel.c (original)
+++ trunk/priv/host_ppc_isel.c Mon Jun 22 12:53:48 2015
@@ -2475,19 +2475,21 @@
static Bool uInt_fits_in_16_bits ( UInt u )
{
/* Is u the same as the sign-extend of its lower 16 bits? */
- Int i = u & 0xFFFF;
- i <<= 16;
- i >>= 16;
- return toBool(u == (UInt)i);
+ UInt v = u & 0xFFFF;
+
+ v = (Int)(v << 16) >> 16; /* sign extend */
+
+ return u == v;
}
static Bool uLong_fits_in_16_bits ( ULong u )
{
/* Is u the same as the sign-extend of its lower 16 bits? */
- Long i = u & 0xFFFFULL;
- i <<= 48;
- i >>= 48;
- return toBool(u == (ULong)i);
+ ULong v = u & 0xFFFFULL;
+
+ v = (Long)(v << 48) >> 48; /* sign extend */
+
+ return u == v;
}
static Bool uLong_is_4_aligned ( ULong u )
Modified: trunk/priv/host_tilegx_isel.c
==============================================================================
--- trunk/priv/host_tilegx_isel.c (original)
+++ trunk/priv/host_tilegx_isel.c Mon Jun 22 12:53:48 2015
@@ -369,12 +369,13 @@
result. The expression may only be a word-size one.
*/
-static Bool uInt_fits_in_16_bits ( UInt u )
+static Bool uInt_fits_in_16_bits ( UInt u )
{
- Int i = u & 0xFFFF;
- i <<= 16;
- i >>= 16;
- return toBool(u == (UInt) i);
+ UInt v = u & 0xFFFF;
+
+ v = (Int)(v << 16) >> 16; /* sign extend */
+
+ return u == v;
}
static Bool sane_AMode ( ISelEnv * env, TILEGXAMode * am )
|