Fixed a serious bug in list.h. :-(

Improved tests to be multi-threaded. Still needs a lot more testing.
Removed the nasty global variable in test.C.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@584 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kernel/vm2/area.C

@@ -85,14 +85,14 @@ void area::freeArea(void)
 	vpages.dump();
 	for (struct node *cur=vpages.rock;cur;)
 		{
-		printf ("area::freeArea: wasting a page: %x\n",cur);
+		//printf ("area::freeArea: wasting a page: %x\n",cur);
 		vpage *page=(vpage *)cur;
 		page->flush();
-		printf ("area::freeArea: flushed a page \n");
+		//printf ("area::freeArea: flushed a page \n");
 		cur=cur->next;
 		delete page; // Probably need to add a destructor
 		}
-	printf ("area::freeArea: unlocking \n");
+	//printf ("area::freeArea: unlocking \n");
 	manager->unlock();
 	printf ("area::freeArea: ending \n");
 	}

src/kernel/vm2/area.h

@@ -37,6 +37,7 @@ class area : public node
 		status_t setProtection(protectType prot);
 		bool couldAdd(unsigned long start,unsigned long end) { return ((end<start_address) || (start>end_address));}
 		unsigned long getEndAddress(void) {return end_address;}
+		unsigned long getStartAddress(void) {return start_address;}
 		void pager(int desperation);
 		void saver(void);
 

src/kernel/vm2/areaManager.C

@@ -8,12 +8,14 @@ areaManager::areaManager(void)
 
 unsigned long areaManager::getNextAddress(int pages, unsigned long start)
 {
+//	areas.dump();
 	unsigned long end=start+(pages*PAGE_SIZE)-1;
 	for (struct node *cur=areas.rock;cur;cur=cur->next)
 		{
 		if (cur)
 			{
 			area *myArea=(area *)cur;
+//			printf ("Looking for %x, %d pages; current = %x\n",start,pages,myArea->getEndAddress());
 			if (!myArea->couldAdd(start,end))
 				{ // if we don't work, there must be an overlap, so go to the end of this area.
 				start=myArea->getEndAddress();
@@ -40,7 +42,7 @@ area *areaManager::findArea(void *address)
 	for (struct node *cur=areas.rock;cur;cur=cur->next)
 		{
 		area *myArea=(area *)cur;
-	//	printf ("areaManager::findArea: Looking for %d\n",address);
+//		printf ("areaManager::findArea: Looking for %x between %x and %x\n",address,myArea->getStartAddress(),myArea->getEndAddress());
 		if (myArea->contains(address))
 				return myArea;
 		}

src/kernel/vm2/list.h

@@ -24,6 +24,12 @@ class list {
 		void *next(void) {nodeCount--;node *n=rock;if (rock) rock=rock->next;return n;} 
 		void remove(node *toNuke)
 			{
+//			printf ("list::remove starting: nuking %x \n",toNuke);
+//			list::dump();	
+			if (rock==toNuke)
+				rock=rock->next;
+			else
+				{
 				bool done=false;
 				for (struct node *cur=rock;!done && cur->next;cur=cur->next)
 					if (cur->next==toNuke)
@@ -32,6 +38,9 @@ class list {
 						done=true;
 						}
 				}
+//			printf ("list::remove ending: \n");
+//			list::dump();	
+			}
 		void dump(void)
 			{
 			for (struct node *cur=rock;cur;cur=cur->next)

src/kernel/vm2/pageManager.C

@@ -33,26 +33,26 @@ pageManager::pageManager(int pages)
 page *pageManager::getPage(void)
 	{
 	page *ret=NULL;
-	printf ("pageManager::getPage: Checking clean\n");
+	//printf ("pageManager::getPage: Checking clean\n");
 	printf ("pageManager::getPage:cleanCount = %d\n", clean.nodeCount);
 	if (clean.count())
 		{
-		printf ("pageManager::getPage:locking clean\n");
+		//printf ("pageManager::getPage:locking clean\n");
 		acquire_sem(cleanLock);
-		printf ("pageManager::getPage:locked clean\n");
+		//printf ("pageManager::getPage:locked clean\n");
 		ret=(page *)clean.next();
-		printf ("pageManager::getPage:got next clean\n");
+		//printf ("pageManager::getPage:got next clean\n");
 		release_sem(cleanLock);
-		printf ("pageManager::getPage:unlocked clean\n");
+		//printf ("pageManager::getPage:unlocked clean\n");
 		} // This could fail if someone swoops in and steal our page.
 	if (!ret && unused.count())
 		{
-		printf ("pageManager::getPage:Checking unused\n");
+		//printf ("pageManager::getPage:Checking unused\n");
 		acquire_sem(unusedLock);
 		ret=(page *)unused.next();
-		printf ("pageManager::getPage:got next unused\n");
+		//printf ("pageManager::getPage:got next unused\n");
 		release_sem(unusedLock);
-		printf ("pageManager::getPage:next unused = %x\n",ret);
+		//printf ("pageManager::getPage:next unused = %x\n",ret);
 		if (ret)
 			ret->zero();
 		} // This could fail if someone swoops in and steal our page.
@@ -62,6 +62,7 @@ page *pageManager::getPage(void)
 		inUse.add(ret);
 		release_sem(inUseLock);
 		}
+	printf ("pageManager::getPage:leaving with page = %x\n", ret);
 	return ret;
 	}
 
@@ -89,7 +90,7 @@ void pageManager::cleaner(void)
 			clean.add(first);
 			release_sem(cleanLock);
 			release_sem(unusedLock);
-			printf ("pageManager::cleaner: All done with vacuum a page\n");
+			//printf ("pageManager::cleaner: All done with vacuum a page\n");
 			snooze(125000);	
 			}
 		}

src/kernel/vm2/test.C

@@ -1,44 +1,60 @@
 #include "vmInterface.h"
 #include <stdio.h>
 
-unsigned long addr;
 vmInterface vm(10);
 
-void writeByte(unsigned int offset, char value) { vm.setByte(addr+offset,value); }
+void writeByte(unsigned long addr,unsigned int offset, char value) { vm.setByte(addr+offset,value); }
 
-unsigned char readByte(unsigned int offset ) { char value=vm.getByte(addr+offset); return value; }
+unsigned char readByte(unsigned long addr,unsigned int offset ) { char value=vm.getByte(addr+offset); return value; }
 
 int createFillAndTest(int pages)
 {
+	unsigned long addr;
 	int area1;
 	area1=vm.createArea("Mine",pages,(void **)(&addr));
 	for (int i=0;i<pages*PAGE_SIZE;i++)
-		writeByte(i,i%256);
+		writeByte(addr,i,i%256);
 	for (int i=0;i<pages*PAGE_SIZE;i++)
-		if (i%256!=readByte(i))
-				printf ("ERROR! Byte at offset %d does not match: expected: %d, found: %d\n",i,i%256,readByte(i));
+		if (i%256!=readByte(addr,i))
+				printf ("ERROR! Byte at offset %d does not match: expected: %d, found: %d\n",i,i%256,readByte(addr,i));
 	return area1;
 }
 
+struct loopTestParameters
+{
+	char *name;
+	bigtime_t initialSnooze;
+	int areaSize;
+	bigtime_t holdSnooze;
+	bigtime_t loopSnooze;
+};
+
+int32 loopTest(void *parameters)
+	{
+	loopTestParameters *params=((loopTestParameters *)parameters);
+	int area1;
+
+	while (1)
+		{
+		snooze(params->initialSnooze);
+		printf ("Creating %s area\n",params->name);
+		area1=createFillAndTest(params->areaSize);
+		snooze(params->holdSnooze);
+		printf ("Freeing %s area\n",params->name);
+		vm.freeArea(area1);
+		snooze(params->loopSnooze);
+		}
+	}
+
 int main(int argc,char **argv)
 {
-	int area1,area2;
-	printf ("Creating a new area1\n");
-	area1=createFillAndTest(2);
-	snooze(5000000);
-	printf ("Creating a new area2\n");
-	area2=createFillAndTest(2);
-	snooze(500000);
-	printf ("Freeing area1\n");
-	vm.freeArea(area1);
-	snooze(500000);
-	printf ("Freeing area2\n");
-	vm.freeArea(area2);
-	printf ("Done Freeing area2\n");
-	snooze(20000000);
+	loopTestParameters area1Params={"area1",1000000,2,100000,100000};
+	loopTestParameters area2Params={"area2",1000000,2,100000,100000};
+
+	resume_thread(spawn_thread(loopTest,"area test 1",0,&area1Params));
+	resume_thread(spawn_thread(loopTest,"area test 2",0,&area2Params));
+
+	snooze(50000000);
 
-	printf ("Creating a new area\n");
-	area1=createFillAndTest(2);
-	vm.freeArea(area1);
 	return 0;
 }

src/kernel/vm2/vmInterface.C

@@ -97,7 +97,10 @@ void vmInterface::freeArea(int Area)
 status_t vmInterface::getAreaInfo(int Area,area_info *dest)
 	{
 	area *oldArea=getAM()->findArea(Area);	
+	if (oldArea)
 		return oldArea->getInfo(dest);
+	else
+		printf ("vmInterface::getAreaInfo: unable to find requested area\n");
 	}
 
 status_t vmInterface::getNextAreaInfo(int  process,int32 *cookie,area_info *dest)

src/kernel/vm2/vpage.C

@@ -55,7 +55,7 @@ void vpage::setProtection(protectType prot)
 
 bool vpage::fault(void *fault_address, bool writeError) // true = OK, false = panic.
 	{ // This is dispatched by the real interrupt handler, who locates us
-	printf ("vpage::fault: address = %d, write = %s\n",(unsigned long) fault_address,((writeError)?"true":"false"));
+	//printf ("vpage::fault: address = %d, write = %s\n",(unsigned long) fault_address,((writeError)?"true":"false"));
 	if (writeError)
 		{
 		dirty=true;
@@ -78,7 +78,7 @@ bool vpage::fault(void *fault_address, bool writeError) // true = OK, false = pa
 	// Update the architecture specific stuff here...
 	// This refresh is unneeded if the data was never written out... 
 	refresh(); // I wonder if these vnode calls are safe during an interrupt...
-	printf ("vpage::fault: Refreshed\n");
+	//printf ("vpage::fault: Refreshed\n");
 
 	}