//
// Get and map multiple new pages. On failure, no pages are allocated.
//
internal static bool CommitAndMapRange(UIntPtr virtualAddr,
UIntPtr limitAddr,
ProtectionDomain inDomain)
{
DebugStub.Assert(IsPageAligned(virtualAddr));
DebugStub.Assert(IsPageAligned(limitAddr));
for (UIntPtr step = virtualAddr;
step < limitAddr;
step += PageSize)
{
if (!CommitAndMapNewPage(step, inDomain))
{
// Uh oh; we failed.
for (UIntPtr unmapStep = virtualAddr;
unmapStep < virtualAddr;
unmapStep += PageSize)
{
UnmapAndReleasePage(unmapStep);
}
return(false);
}
}
return(true);
}
public static string GetCodeSourceLocation()
{
var f = default(FileInfo);
try
{
// Error 40 The call is ambiguous between the following methods or properties: 'ScriptCoreLibJava.Extensions.BCLImplementationExtensions.ToClass(System.Type)' and 'ScriptCoreLibJava.Extensions.BCLImplementationExtensions.ToClass(System.Type)' X:\jsc.svn\core\ScriptCoreLib.Ultra\ScriptCoreLib.Ultra\Java\Interop\CodeSourceLocationProvider.cs 22 27 ScriptCoreLib.Ultra
var cls = BCLImplementationExtensions.ToClass(typeof(CodeSourceLocationProvider));
ProtectionDomain pDomain = cls.getProtectionDomain();
CodeSource cSource = pDomain.getCodeSource();
URL loc = cSource.getLocation();
var ff = loc.getFile();
var prefix = "file:/";
if (prefix == ff.Substring(0, prefix.Length))
{
ff = ff.Substring(prefix.Length);
}
f = new FileInfo(ff);
}
catch
{
throw new NotSupportedException();
}
return(f.FullName);
}
internal unsafe VirtualMemoryRange(VirtualMemoryRange_struct *pRange,
ProtectionDomain inDomain)
{
this.pRange = pRange;
this.indirect = true;
// never use this.range
DebugStub.Assert(inDomain != null);
this.parentDomain = inDomain;
}
internal unsafe VirtualMemoryRange(UIntPtr baseAddr,
UIntPtr limitAddr,
ProtectionDomain inDomain)
{
DebugStub.Assert(inDomain != null);
this.parentDomain = inDomain;
range = new VirtualMemoryRange_struct(baseAddr, limitAddr,
baseAddr, limitAddr,
inDomain);
this.indirect = false;
// never use this.pRange
}
//
// Get a new physical page and map it to the provided virtual address
//
private static bool CommitAndMapNewPage(UIntPtr virtualAddr,
ProtectionDomain inDomain)
{
DebugStub.Assert(IsPageAligned(virtualAddr));
PhysicalAddress newPage = PhysicalPages.AllocPage();
if (newPage == PhysicalAddress.Null)
{
// Failed.
return(false);
}
VMManager.MapPage(newPage, virtualAddr, inDomain);
return(true);
}
//
// Allocates and commits a new range of memory.
//
internal UIntPtr Allocate(UIntPtr numPages, Process process,
uint extra, PageType type,
ProtectionDomain inDomain)
{
DebugStub.Assert(numPages > 0);
UIntPtr mapAddr = UIntPtr.Zero;
bool iflag = Lock();
// Within our lock, figure out where we're going to stick the newly
// mapped memory, and mark it used.
try {
mapAddr = ReserveInternal(numPages, process, extra, type);
if (mapAddr == UIntPtr.Zero)
{
DebugStub.Assert(false, "Failed to find a mapping point for new memory");
return(mapAddr);
}
}
finally {
Unlock(iflag);
}
UIntPtr limitAddr = mapAddr + MemoryManager.BytesFromPages(numPages);
// Now actually map pages to the chosen region.
if (!MemoryManager.CommitAndMapRange(mapAddr, limitAddr, inDomain))
{
// yikes; failure
return(UIntPtr.Zero);
}
allocatedCount++;
allocatedBytes += (ulong)MemoryManager.BytesFromPages(numPages);
if (process != null)
{
process.Allocated(MemoryManager.BytesFromPages(numPages));
}
return(mapAddr);
}
/// <summary>
/// Converts an array of bytes into an instance of class <tt>Class</tt>, with an optional <tt>ProtectionDomain</tt>.
/// </summary>
protected Class defineClass(string name, sbyte[] b, int off, int len, ProtectionDomain protectionDomain)
{
return(default(Class));
}
/////////////////////////////////////
// PUBLIC METHODS
/////////////////////////////////////
//
// The range of memory turned over to a VirtualMemoryRange structure
// must not have *any* mapped pages in it to start out with
//
// A VirtualMemoryRange can build a pagetable that *describes*
// more memory than it *manages* (this supports some kernel GC
// oddities). In that case, pages out-of-range are marked
// as PageType.Unknown. Obviously, allocation requests are never
// satisfied with out-of-bounds data.
//
internal unsafe VirtualMemoryRange_struct(
UIntPtr baseAddr, UIntPtr limitAddr,
UIntPtr descrBaseAddr, UIntPtr descrLimitAddr,
ProtectionDomain inDomain)
{
DebugStub.Assert(MemoryManager.IsPageAligned(baseAddr));
DebugStub.Assert(MemoryManager.IsPageAligned(limitAddr));
DebugStub.Assert(MemoryManager.IsPageAligned(descrBaseAddr));
DebugStub.Assert(MemoryManager.IsPageAligned(descrLimitAddr));
// The descriptive range can't be smaller than the managed range
DebugStub.Assert(descrLimitAddr >= limitAddr);
DebugStub.Assert(descrBaseAddr <= baseAddr);
descrBase = descrBaseAddr;
descrLimit = descrLimitAddr;
rangeBase = baseAddr;
rangeLimit = limitAddr;
rangeLock = new SpinLock(SpinLock.Types.VirtualMemoryRange);
describedPages = MemoryManager.PagesFromBytes(descrLimit - descrBase);
// Figure out how many pages we need for a page description table
UIntPtr pageTableSize = MemoryManager.PagePad(describedPages * sizeof(uint));
dataStart = baseAddr + pageTableSize;
nextAlloc = dataStart;
// Commit and prepare the page table
pageTable = (uint *)baseAddr;
bool success = MemoryManager.CommitAndMapRange(
baseAddr, baseAddr + pageTableSize, inDomain);
if (!success)
{
Kernel.Panic("Couldn't get pages to create a new VirtualMemoryRange page table");
}
allocatedBytes = 0;
allocatedCount = 0;
freedBytes = 0;
freedCount = 0;
// Describe the pages outside our range as Unknown
if (descrBase < rangeBase)
{
SetRange(descrBase, rangeBase, MemoryManager.PageUnknown);
}
if (descrLimit > rangeLimit)
{
SetRange(rangeLimit, descrLimit, MemoryManager.PageUnknown);
}
// The page-table pages themselves are in use by the System
SetRange((UIntPtr)pageTable,
(UIntPtr)pageTable + pageTableSize,
MemoryManager.KernelPageNonGC);
// Describe pages in-range as Free
SetRange(dataStart, rangeLimit, MemoryManager.PageFree);
#if DEBUG
// Check that our data range is pristine
for (UIntPtr stepAddr = dataStart;
stepAddr < rangeLimit;
stepAddr += MemoryManager.PageSize)
{
DebugStub.Assert(!VMManager.IsPageMapped(stepAddr));
}
#endif
}
/// <summary> /// Check whether the policy has granted a Permission to a ProtectionDomain. /// </summary> /// <param name="domain"> the ProtectionDomain to check. /// </param> /// <param name="permission"> check whether this permission is granted to the /// specified domain. /// </param> /// <returns> boolean true if the permission is granted to the domain. </returns> protected internal abstract bool EngineImplies(ProtectionDomain domain, Permission permission);
/// <summary>
/// Return a PermissionCollection object containing the set of
/// permissions granted to the specified ProtectionDomain.
///
/// <para> The default implementation of this method returns
/// Policy.UNSUPPORTED_EMPTY_COLLECTION object. This method can be
/// overridden if the policy implementation can return a set of
/// permissions granted to a ProtectionDomain.
///
/// </para>
/// </summary>
/// <param name="domain"> the ProtectionDomain to which the returned
/// PermissionCollection has been granted.
/// </param>
/// <returns> a set of permissions granted to the specified ProtectionDomain.
/// If this operation is supported, the returned
/// set of permissions must be a new mutable instance
/// and it must support heterogeneous Permission types.
/// If this operation is not supported,
/// Policy.UNSUPPORTED_EMPTY_COLLECTION is returned. </returns>
protected internal virtual PermissionCollection EngineGetPermissions(ProtectionDomain domain)
{
return(Policy.UNSUPPORTED_EMPTY_COLLECTION);
}
public Key(ProtectionDomain outerInstance)
{
this.OuterInstance = outerInstance;
}
public PrivilegedActionAnonymousInnerClassHelper(ProtectionDomain outerInstance)
{
this.OuterInstance = outerInstance;
}
public virtual PermissionCollection Get(ProtectionDomain pd)
{
return(pd == null?map.get(null) : map.get(pd.Key));
}
public virtual void Put(ProtectionDomain pd, PermissionCollection pc)
{
map.put((pd == null ? null : pd.Key), pc);
}