#include <acess.h>
#include <mm_virt.h>
#include <heap_int.h>
+#include <limits.h>
#define WARNINGS 1 // Warn and dump on heap errors
#define DEBUG_TRACE 0 // Enable tracing of allocations
Heap_Extend(HEAP_INIT_SIZE);
}
+static inline tHeapHead *Heap_NextHead(tHeapHead *Head) {
+ return (void*)( (char*)Head + Head->Size );
+}
+static inline tHeapFoot *Heap_ThisFoot(tHeapHead *Head) {
+ return (void*)( (char*)Head + Head->Size - sizeof(tHeapFoot) );
+}
+static inline tHeapFoot *Heap_PrevFoot(tHeapHead *Head) {
+ //ASSERT(Head != gHeapStart);
+ return (void*)( (char*)Head - sizeof(tHeapFoot) );
+}
+
/**
* \brief Extend the size of the heap
*/
void *Heap_Extend(size_t Bytes)
{
- tHeapHead *head = gHeapEnd;
- tHeapFoot *foot;
+
+ Debug("Heap_Extend(0x%x)", Bytes);
// Bounds Check
if( gHeapEnd == (tHeapHead*)MM_KHEAP_MAX ) {
{
if( !MM_Allocate( (tVAddr)gHeapEnd+(i<<12) ) )
{
- Warning("OOM - Heap_Extend");
+ Warning("OOM - Heap_Extend (%i bytes)");
Heap_Dump(1);
return NULL;
}
}
// Increase heap end
+ tHeapHead *head = gHeapEnd;
gHeapEnd = new_end;
// Create Block
head->Size = (Bytes+0xFFF)&~0xFFF;
head->Magic = MAGIC_FREE;
- foot = (void*)( (Uint)gHeapEnd - sizeof(tHeapFoot) );
+ tHeapFoot *foot = Heap_ThisFoot(head);
foot->Head = head;
foot->Magic = MAGIC_FOOT;
//Log("Heap_Merge: (Head=%p)", Head);
- thisFoot = (void*)( (Uint)Head + Head->Size - sizeof(tHeapFoot) );
- if((Uint)thisFoot > (Uint)gHeapEnd) return NULL;
+ thisFoot = Heap_ThisFoot(Head);
+ if( (void*)thisFoot > (void*)gHeapEnd )
+ return NULL;
// Merge Left (Down)
- foot = (void*)( (Uint)Head - sizeof(tHeapFoot) );
+ foot = Heap_PrevFoot(Head);
if( ((Uint)foot < (Uint)gHeapEnd && (Uint)foot > (Uint)gHeapStart)
&& foot->Head->Magic == MAGIC_FREE) {
foot->Head->Size += Head->Size; // Increase size
}
// Merge Right (Upwards)
- head = (void*)( (Uint)Head + Head->Size );
+ head = Heap_NextHead(Head);
if((Uint)head < (Uint)gHeapEnd && head->Magic == MAGIC_FREE)
{
Head->Size += head->Size;
- foot = (void*)( (Uint)Head + Head->Size - sizeof(tHeapFoot) );
+ foot = Heap_ThisFoot(Head);
foot->Head = Head; // Update Backlink
thisFoot->Head = NULL; // Clear old footer
thisFoot->Magic = 0;
*/
void *Heap_Allocate(const char *File, int Line, size_t __Bytes)
{
- tHeapHead *head, *newhead;
+ tHeapHead *newhead;
tHeapFoot *foot, *newfoot;
tHeapHead *best = NULL;
- Uint bestSize = 0; // Speed hack
+ Uint bestSize = UINT_MAX; // Speed hack
size_t Bytes;
if( __Bytes == 0 ) {
Mutex_Acquire(&glHeap);
// Traverse Heap
- for( head = gHeapStart; head < gHeapEnd; head = (void*)((Uint)head + head->Size) )
+ for( tHeapHead *head = gHeapStart; head < gHeapEnd; head = Heap_NextHead(head) )
{
// Alignment Check
#if POW2_SIZES
#endif
Mutex_Release(&glHeap); // Release spinlock
#if WARNINGS
- Log_Warning("Heap", "Size of heap address %p is invalid - not aligned (0x%x) [at paddr 0x%x]",
+ Log_Warning("Heap", "Size of heap address %p is invalid"
+ " - not aligned (0x%x) [at paddr 0x%x]",
head, head->Size, MM_GetPhysAddr(&head->Size));
Heap_Dump(VERBOSE_DUMP);
#endif
}
if( head->Size < MIN_SIZE ) {
Mutex_Release(&glHeap);
- Log_Warning("Heap", "Size of heap address %p is invalid - Too small (0x%x) [at paddr 0x%x]",
+ Log_Warning("Heap", "Size of heap address %p is invalid"
+ " - Too small (0x%x) [at paddr 0x%x]",
head, head->Size, MM_GetPhysAddr(&head->Size));
Heap_Dump(VERBOSE_DUMP);
return NULL;
}
if( head->Size > (2<<30) ) {
Mutex_Release(&glHeap);
- Log_Warning("Heap", "Size of heap address %p is invalid - Over 2GiB (0x%x) [at paddr 0x%x]",
+ Log_Warning("Heap", "Size of heap address %p is invalid"
+ " - Over 2GiB (0x%x) [at paddr 0x%x]",
head, head->Size, MM_GetPhysAddr(&head->Size));
Heap_Dump(VERBOSE_DUMP);
return NULL;
best = Heap_Extend( Bytes );
// Check for errors
if(!best) {
+ Warning("OOM when allocating 0x%x bytes", Bytes);
Mutex_Release(&glHeap); // Release spinlock
return NULL;
}
}
// Split Block
- newhead = (void*)( (Uint)best + Bytes );
- newfoot = (void*)( (Uint)best + Bytes - sizeof(tHeapFoot) );
- foot = (void*)( (Uint)best + best->Size - sizeof(tHeapFoot) );
-
- newfoot->Head = best; // Create new footer
- newfoot->Magic = MAGIC_FOOT;
- newhead->Size = best->Size - Bytes; // Create new header
- newhead->Magic = MAGIC_FREE;
- foot->Head = newhead; // Update backlink in old footer
+ // - Save size for new block
+ size_t newsize = best->Size - Bytes;
+ // - Allocate beginning of old block
best->Size = Bytes; // Update size in old header
best->ValidSize = __Bytes;
best->Magic = MAGIC_USED; // Mark block as used
best->File = File;
best->Line = Line;
best->AllocateTime = now();
+ // - Create a new foot on old block
+ newfoot = Heap_ThisFoot(best);
+ newfoot->Head = best; // Create new footer
+ newfoot->Magic = MAGIC_FOOT;
+ // - Create a new header after resized old
+ newhead = Heap_NextHead(best);
+ newhead->Size = newsize;
+ newhead->Magic = MAGIC_FREE;
+ newhead->ValidSize = 0;
+ newhead->File = NULL;
+ newhead->Line = 0;
+ // - Update footer
+ foot = Heap_ThisFoot(newhead);
+ foot->Head = newhead;
Mutex_Release(&glHeap); // Release spinlock
#if DEBUG_TRACE
*/
void Heap_Deallocate(const char *File, int Line, void *Ptr)
{
- tHeapHead *head = (void*)( (Uint)Ptr - sizeof(tHeapHead) );
- tHeapFoot *foot;
-
// INVLPTR is returned from Heap_Allocate when the allocation
// size is zero.
if( Ptr == INVLPTR ) return;
// Alignment Check
- if( (Uint)Ptr & (sizeof(Uint)-1) ) {
+ if( (tVAddr)Ptr % sizeof(void*) != 0 ) {
Log_Warning("Heap", "free - Passed a non-aligned address (%p)", Ptr);
return;
}
}
// Check memory block - Header
- head = (void*)( (Uint)Ptr - sizeof(tHeapHead) );
+ tHeapHead *head = (void*)( (Uint)Ptr - sizeof(tHeapHead) );
if(head->Magic == MAGIC_FREE) {
Log_Warning("Heap", "free - Passed a freed block (%p) by %s:%i (was freed by %s:%i)",
head, File, Line,
}
// Check memory block - Footer
- foot = (void*)( (Uint)head + head->Size - sizeof(tHeapFoot) );
+ tHeapFoot *foot = Heap_ThisFoot(head);
if(foot->Head != head) {
Log_Warning("Heap", "free - Footer backlink is incorrect (%p, 0x%x)", head, foot->Head);
Log_Notice("Heap", "Allocated by %s:%i", head->File, head->Line);
return;
}
if(foot->Magic != MAGIC_FOOT) {
- Log_Warning("Heap", "free - Footer magic is invalid (%p, %p = 0x%x)", head, &foot->Magic, foot->Magic);
+ Log_Warning("Heap", "free - Footer magic is invalid (%p, %p = 0x%x)",
+ head, &foot->Magic, foot->Magic);
Log_Notice("Heap", "Allocated by %s:%i", head->File, head->Line);
return;
}
if(newSize <= head->Size) return __ptr;
// Check if next block is free
- nextHead = (void*)( (Uint)head + head->Size );
+ nextHead = Heap_NextHead(head);
// Extend into next block
if(nextHead->Magic == MAGIC_FREE && nextHead->Size+head->Size >= newSize)
{
Uint size = nextHead->Size + head->Size;
- foot = (void*)( (Uint)nextHead + nextHead->Size - sizeof(tHeapFoot) );
+ foot = Heap_ThisFoot(nextHead);
// Exact Fit
if(size == newSize) {
head->Size = newSize;
return __ptr;
}
// Create a new heap block
- nextHead = (void*)( (Uint)head + newSize );
- nextHead->Size = size - newSize;
- nextHead->Magic = MAGIC_FREE;
- foot->Head = nextHead; // Edit 2nd footer
- head->Size = newSize; // Edit first header
- head->File = File;
+ // - Update old with new information
+ head->Size = newSize;
+ head->File = File; // Kinda counts as a new allocation
head->Line = Line;
head->ValidSize = __size;
- // Create new footer
- foot = (void*)( (Uint)head + newSize - sizeof(tHeapFoot) );
+ // - Create new footer
+ foot = Heap_ThisFoot(head);
foot->Head = head;
foot->Magic = MAGIC_FOOT;
+ // - Create new header
+ nextHead = Heap_NextHead(head);
+ nextHead->Size = size - newSize;
+ nextHead->Magic = MAGIC_FREE;
+ // - Update old footer
+ foot->Head = nextHead;
return __ptr;
}
// Extend downwards?
- foot = (void*)( (Uint)head - sizeof(tHeapFoot) );
+ foot = Heap_PrevFoot(head);
nextHead = foot->Head;
if(nextHead->Magic == MAGIC_FREE && nextHead->Size+head->Size >= newSize)
{
// Inexact fit, split things up
if(size > newSize)
{
- // TODO
+ // TODO: Handle splitting of downwards blocks
Warning("[Heap ] TODO: Space efficient realloc when new size is smaller");
}
// Exact fit
- if(size >= newSize)
- {
- Uint oldDataSize;
- // Set 1st (new/lower) header
- nextHead->Magic = MAGIC_USED;
- nextHead->Size = newSize;
- nextHead->File = File;
- nextHead->Line = Line;
- nextHead->ValidSize = __size;
- // Get 2nd (old) footer
- foot = (void*)( (Uint)nextHead + newSize );
- foot->Head = nextHead;
- // Save old data size
- oldDataSize = head->Size - sizeof(tHeapFoot) - sizeof(tHeapHead);
- // Clear old header
- head->Size = 0;
- head->Magic = 0;
- // Copy data
- memcpy(nextHead->Data, __ptr, oldDataSize);
- // Return
- return nextHead->Data;
- }
- // On to the expensive then
+ Uint oldDataSize;
+ // Set 1st (new/lower) header
+ nextHead->Magic = MAGIC_USED;
+ nextHead->Size = newSize;
+ nextHead->File = File;
+ nextHead->Line = Line;
+ nextHead->ValidSize = __size;
+ // Get 2nd (old) footer
+ foot = Heap_ThisFoot(nextHead);
+ foot->Head = nextHead;
+ // Save old data size
+ oldDataSize = head->Size - sizeof(tHeapFoot) - sizeof(tHeapHead);
+ // Clear old header
+ head->Size = 0;
+ head->Magic = 0;
+ // Copy data
+ memmove(nextHead->Data, __ptr, oldDataSize);
+ // Return
+ return nextHead->Data;
}
// Well, darn
head = gHeapStart;
while( (Uint)head < (Uint)gHeapEnd )
{
- foot = (void*)( (Uint)head + head->Size - sizeof(tHeapFoot) );
+ foot = Heap_ThisFoot(head);
if( bVerbose )
{
- Log_Log("Heap", "%p (0x%P): 0x%08x (%i) %4C",
+ Log_Log("Heap", "%p (%P): 0x%08x (%i) %4C",
head, MM_GetPhysAddr(head), head->Size, head->ValidSize, &head->Magic);
Log_Log("Heap", "%p %4C", foot->Head, &foot->Magic);
if(head->File) {
badHead = head;
// Work backwards
- foot = (void*)( (tVAddr)gHeapEnd - sizeof(tHeapFoot) );
+ foot = Heap_PrevFoot(gHeapEnd);
Log_Log("Heap", "==== Going Backwards ==== (from %p)", foot);
head = foot->Head;
while( (tVAddr)head >= (tVAddr)badHead )
if(head == badHead) break;
- foot = (void*)( (tVAddr)head - sizeof(tHeapFoot) );
+ foot = Heap_PrevFoot(head);
head = foot->Head;
Log_Debug("Heap", "head=%p", head);
}
int maxAlloc=0, minAlloc=-1;
int avgAlloc, frag, overhead;
- for(tHeapHead *head = gHeapStart; head < gHeapEnd; head = (void*)( (tVAddr)head + head->Size ) )
+ for( tHeapHead *head = gHeapStart; head < gHeapEnd; head = Heap_NextHead(head) )
{
nBlocks ++;
totalBytes += head->Size;
git.ucc.asn.au / tpg / acess2.git / blobdiff
UCC git Repository :: git.ucc.asn.au