X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;ds=sidebyside;f=Kernel%2Fheap.c;h=c440b1835948e914aeffb42639481ffae27c6f62;hb=de1db24a66d9dc40d9ab828683376851166340a0;hp=abf5f27ea83f451c4807fa4709e383031ccfaf32;hpb=a9f5c2be879ab67080122aaabe83a7ae897126bb;p=tpg%2Facess2.git

diff --git a/Kernel/heap.c b/Kernel/heap.c
index abf5f27e..c440b183 100644
--- a/Kernel/heap.c
+++ b/Kernel/heap.c
@@ -28,10 +28,10 @@
 void	Heap_Install(void);
 void	*Heap_Extend(int Bytes);
 void	*Heap_Merge(tHeapHead *Head);
-void	*Heap_Allocate(const char *File, int Line, size_t Bytes);
-void	*Heap_AllocateZero(const char *File, int Line, size_t Bytes);
-void	*Heap_Reallocate(const char *File, int Line, void *Ptr, size_t Bytes);
-void	Heap_Deallocate(void *Ptr);
+//void	*Heap_Allocate(const char *File, int Line, size_t Bytes);
+//void	*Heap_AllocateZero(const char *File, int Line, size_t Bytes);
+//void	*Heap_Reallocate(const char *File, int Line, void *Ptr, size_t Bytes);
+//void	Heap_Deallocate(void *Ptr);
 void	Heap_Dump(void);
 void	Heap_Stats(void);
 
@@ -62,6 +62,11 @@ void *Heap_Extend(int Bytes)
 	if( (tVAddr)gHeapEnd == MM_KHEAP_MAX )
 		return NULL;
 	
+	if( Bytes == 0 ) {
+		Log_Warning("Heap", "Heap_Extend called with Bytes=%i", Bytes);
+		return NULL;
+	}
+	
 	// Bounds Check
 	if( (tVAddr)gHeapEnd + ((Bytes+0xFFF)&~0xFFF) > MM_KHEAP_MAX ) {
 		Bytes = MM_KHEAP_MAX - (tVAddr)gHeapEnd;
@@ -69,11 +74,17 @@ void *Heap_Extend(int Bytes)
 	}
 	
 	// Heap expands in pages
-	for(i=0;i<(Bytes+0xFFF)>>12;i++)
-		MM_Allocate( (tVAddr)gHeapEnd+(i<<12) );
+	for( i = 0; i < (Bytes+0xFFF) >> 12; i ++ )
+	{
+		if( !MM_Allocate( (tVAddr)gHeapEnd+(i<<12) ) )
+		{
+			Warning("OOM - Heap_Extend");
+			return NULL;
+		}
+	}
 	
 	// Increas heap end
-	gHeapEnd += i << 12;
+	gHeapEnd = (Uint8*)gHeapEnd + (i << 12);
 	
 	// Create Block
 	head->Size = (Bytes+0xFFF)&~0xFFF;
@@ -143,6 +154,11 @@ void *Heap_Allocate(const char *File, int Line, size_t __Bytes)
 	tHeapHead	*best = NULL;
 	Uint	bestSize = 0;	// Speed hack
 	size_t	Bytes;
+
+	if( __Bytes == 0 ) {
+		//return NULL;	// TODO: Return a known un-mapped range.
+		return INVLPTR;
+	}
 	
 	// Get required size
 	#if POW2_SIZES
@@ -277,6 +293,10 @@ void Heap_Deallocate(void *Ptr)
 	Log_Log("Heap", "free: Returns to %p", __builtin_return_address(0));
 	#endif
 	
+	// INVLPTR is returned from Heap_Allocate when the allocation
+	// size is zero.
+	if( Ptr == INVLPTR )	return;
+	
 	// Alignment Check
 	if( (Uint)Ptr & (sizeof(Uint)-1) ) {
 		Log_Warning("Heap", "free - Passed a non-aligned address (%p)", Ptr);
@@ -299,7 +319,7 @@ void Heap_Deallocate(void *Ptr)
 	}
 	if(head->Magic != MAGIC_USED) {
 		Log_Warning("Heap", "free - Magic value is invalid (%p, 0x%x)", head, head->Magic);
-		Log_Notice("Heap", "Allocated %s:%i", head->File, head->Line);
+		Log_Notice("Heap", "Allocated by %s:%i", head->File, head->Line);
 		return;
 	}
 	
@@ -307,12 +327,12 @@ void Heap_Deallocate(void *Ptr)
 	foot = (void*)( (Uint)head + head->Size - sizeof(tHeapFoot) );
 	if(foot->Head != head) {
 		Log_Warning("Heap", "free - Footer backlink is incorrect (%p, 0x%x)", head, foot->Head);
-		Log_Notice("Heap", "Allocated %s:%i", head->File, head->Line);
+		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_Notice("Heap", "Allocated %s:%i", head->File, head->Line);
+		Log_Notice("Heap", "Allocated by %s:%i", head->File, head->Line);
 		return;
 	}
 	
@@ -546,7 +566,7 @@ void Heap_Dump(void)
 		return ;
 
 	#if !VERBOSE_DUMP
-	Log_Log("Heap", "%p (0x%llx): 0x%08lx (%i) %4C",
+	Log_Log("Heap", "%p (0x%llx): 0x%08lx %i %4C",
 		head, MM_GetPhysAddr((Uint)head), head->Size, head->ValidSize, &head->Magic);
 	Log_Log("Heap", "%p %4C", foot->Head, &foot->Magic);
 	if(head->File) {
@@ -644,8 +664,8 @@ void Heap_Stats(void)
 		
 		// Print the block info?
 		#if 1
-		Log_Debug("Heap", "%p - 0x%x Owned by %s:%i",
-			head, head->Size, head->File, head->Line);
+		Log_Debug("Heap", "%p - 0x%x (%i) Owned by %s:%i",
+			head, head->Size, head->ValidSize, head->File, head->Line);
 		#endif
 	}