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Fix building RTS with gcc 2.*; declare all variables at the top of a block
[ghc-hetmet.git]
/
rts
/
sm
/
GC.c
diff --git
a/rts/sm/GC.c
b/rts/sm/GC.c
index
1fee394
..
e4b5098
100644
(file)
--- a/
rts/sm/GC.c
+++ b/
rts/sm/GC.c
@@
-199,12
+199,12
@@
GarbageCollect ( rtsBool force_major_gc )
lnat oldgen_saved_blocks = 0;
nat g, s, i;
lnat oldgen_saved_blocks = 0;
nat g, s, i;
- ACQUIRE_SM_LOCK;
-
#ifdef PROFILING
CostCentreStack *prev_CCS;
#endif
#ifdef PROFILING
CostCentreStack *prev_CCS;
#endif
+ ACQUIRE_SM_LOCK;
+
debugTrace(DEBUG_gc, "starting GC");
#if defined(RTS_USER_SIGNALS)
debugTrace(DEBUG_gc, "starting GC");
#if defined(RTS_USER_SIGNALS)
@@
-1031,6
+1031,7
@@
GarbageCollect ( rtsBool force_major_gc )
closure if it is alive, or NULL otherwise.
NOTE: Use it before compaction only!
closure if it is alive, or NULL otherwise.
NOTE: Use it before compaction only!
+ It untags and (if needed) retags pointers to closures.
-------------------------------------------------------------------------- */
-------------------------------------------------------------------------- */
@@
-1039,8
+1040,12
@@
isAlive(StgClosure *p)
{
const StgInfoTable *info;
bdescr *bd;
{
const StgInfoTable *info;
bdescr *bd;
+ StgWord tag;
while (1) {
while (1) {
+ /* The tag and the pointer are split, to be merged later when needed. */
+ tag = GET_CLOSURE_TAG(p);
+ p = UNTAG_CLOSURE(p);
ASSERT(LOOKS_LIKE_CLOSURE_PTR(p));
info = get_itbl(p);
ASSERT(LOOKS_LIKE_CLOSURE_PTR(p));
info = get_itbl(p);
@@
-1052,18
+1057,18
@@
isAlive(StgClosure *p)
// for static closures with an empty SRT or CONSTR_STATIC_NOCAFs.
//
if (!HEAP_ALLOCED(p)) {
// for static closures with an empty SRT or CONSTR_STATIC_NOCAFs.
//
if (!HEAP_ALLOCED(p)) {
- return p;
+ return TAG_CLOSURE(tag,p);
}
// ignore closures in generations that we're not collecting.
bd = Bdescr((P_)p);
if (bd->gen_no > N) {
}
// ignore closures in generations that we're not collecting.
bd = Bdescr((P_)p);
if (bd->gen_no > N) {
- return p;
+ return TAG_CLOSURE(tag,p);
}
// if it's a pointer into to-space, then we're done
if (bd->flags & BF_EVACUATED) {
}
// if it's a pointer into to-space, then we're done
if (bd->flags & BF_EVACUATED) {
- return p;
+ return TAG_CLOSURE(tag,p);
}
// large objects use the evacuated flag
}
// large objects use the evacuated flag
@@
-1073,7
+1078,7
@@
isAlive(StgClosure *p)
// check the mark bit for compacted steps
if ((bd->flags & BF_COMPACTED) && is_marked((P_)p,bd)) {
// check the mark bit for compacted steps
if ((bd->flags & BF_COMPACTED) && is_marked((P_)p,bd)) {
- return p;
+ return TAG_CLOSURE(tag,p);
}
switch (info->type) {
}
switch (info->type) {