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support immortal heap area in heap.cpp

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This commit is contained in:
Joel Dice 2008-11-28 19:31:06 -07:00
parent b8056d905c
commit 702525fd32
3 changed files with 24 additions and 6 deletions
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20
src/heap.cpp
View File

@ -509,6 +509,9 @@ class Context {
lowMemoryThreshold(limit / 2),
lock(0),
immortalHeapStart(0),
immortalHeapEnd(0),
ageMap(&gen1, max(1, log(TenureThreshold)), 1, 0, false),
gen1(this, &ageMap, 0, 0),
@ -577,6 +580,9 @@ class Context {
unsigned lowMemoryThreshold;
System::Mutex* lock;
void* immortalHeapStart;
void* immortalHeapEnd;
Segment::Map ageMap;
Segment gen1;
@ -948,7 +954,9 @@ update3(Context* c, void* o, bool* needsVisit)
void*
update2(Context* c, void* o, bool* needsVisit)
{
if (c->mode == Heap::MinorCollection and c->gen2.contains(o)) {
if ((o < c->immortalHeapEnd and o > c->immortalHeapStart)
or (c->mode == Heap::MinorCollection and c->gen2.contains(o)))
{
*needsVisit = false;
return o;
}
@ -1669,6 +1677,11 @@ class MyHeap: public Heap {
c.client = client;
}
virtual void setImmortalHeap(uintptr_t* start, unsigned sizeInWords) {
c.immortalHeapStart = start;
c.immortalHeapEnd = start + sizeInWords;
}
virtual void* tryAllocate(unsigned size) {
return ::tryAllocate(&c, size);
}
@ -1698,8 +1711,9 @@ class MyHeap: public Heap {
Fixie(sizeInWords, objectMask, &(c.fixies), false))->body();
}
virtual void* allocateImmortal(Allocator* allocator, unsigned sizeInWords,
bool objectMask, unsigned* totalInBytes)
virtual void* allocateImmortalFixed(Allocator* allocator,
unsigned sizeInWords, bool objectMask,
unsigned* totalInBytes)
{
*totalInBytes = Fixie::totalSize(sizeInWords, objectMask);
return (new (allocator->allocate(*totalInBytes))

6
src/heap.h
View File

@ -52,11 +52,13 @@ class Heap: public Allocator {
};
virtual void setClient(Client* client) = 0;
virtual void setImmortalHeap(uintptr_t* start, unsigned sizeInWords) = 0;
virtual void collect(CollectionType type, unsigned footprint) = 0;
virtual void* allocateFixed(Allocator* allocator, unsigned sizeInWords,
bool objectMask, unsigned* totalInBytes) = 0;
virtual void* allocateImmortal(Allocator* allocator, unsigned sizeInWords,
bool objectMask, unsigned* totalInBytes) = 0;
virtual void* allocateImmortalFixed(Allocator* allocator,
unsigned sizeInWords, bool objectMask,
unsigned* totalInBytes) = 0;
virtual bool needsMark(void* p) = 0;
virtual bool needsMark(void* p, unsigned offset) = 0;
virtual void mark(void* p, unsigned offset, unsigned count) = 0;

4
src/machine.cpp
View File

@ -1512,6 +1512,8 @@ boot(Thread* t, BootImage* image)
(heapMapSize(image->heapSize), BytesPerWord);
uintptr_t* heap = heapMap + heapMapSizeInWords;
t->m->heap->setImmortalHeap(heap, image->heapSize);
for (unsigned word = 0; word < heapMapSizeInWords; ++word) {
uintptr_t w = heapMap[word];
if (w) {
@ -2170,7 +2172,7 @@ allocate3(Thread* t, Allocator* allocator, Machine::AllocationType type,
case Machine::ImmortalAllocation: {
unsigned total;
object o = static_cast<object>
(t->m->heap->allocateImmortal
(t->m->heap->allocateImmortalFixed
(allocator, ceiling(sizeInBytes, BytesPerWord), objectMask, &total));
cast<uintptr_t>(o, 0) = FixedMark;