Author: arty
Date: Sat Jul 9 09:58:02 2011
New Revision: 52578
URL: http://svn.reactos.org/svn/reactos?rev=52578&view=rev
Log:
[CMAKE] Sidesetup overloading nonpaged pool with big slabs of dwarf data.
Modified:
trunk/reactos/ntoskrnl/kdbg/kdb_symbols.cmake.c
Modified: trunk/reactos/ntoskrnl/kdbg/kdb_symbols.cmake.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/kdbg/kdb_symbols.cmake.c?rev=52578&r1=52577&r2=52578&view=diff
==============================================================================
--- trunk/reactos/ntoskrnl/kdbg/kdb_symbols.cmake.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/kdbg/kdb_symbols.cmake.c [iso-8859-1] Sat Jul 9
09:58:02 2011
@@ -17,6 +17,8 @@
#include <debug.h>
/* GLOBALS ******************************************************************/
+
+#define CURRENT_PROCESS ((HANDLE)~0)
typedef struct _IMAGE_SYMBOL_INFO_CACHE
{
@@ -635,14 +637,69 @@
/* Nothing here */
}
-static PVOID KdbpSymAllocMem(ULONG_PTR size)
-{
- return ExAllocatePoolWithTag(NonPagedPool, size, 'RSYM');
+typedef struct {
+ PMDL Mdl;
+ SIZE_T Size;
+ PVOID OriginalMapping;
+} KdbpMallocHeader;
+
+static PVOID KdbpSymAllocMem(ULONG_PTR Size)
+{
+ KdbpMallocHeader *Hdr;
+ if (Size < PAGE_SIZE)
+ {
+ PVOID Result = ExAllocatePoolWithTag(NonPagedPool, Size +
sizeof(KdbpMallocHeader), 'RSYM');
+ if (!Result) return NULL;
+ Hdr = (KdbpMallocHeader*)Result;
+ Hdr->Mdl = NULL;
+ Hdr->Size = Size;
+ return &Hdr[1];
+ }
+ else
+ {
+ PVOID Base = NULL;
+ SIZE_T RegionSize = Size + sizeof(KdbpMallocHeader);
+ NTSTATUS Status = NtAllocateVirtualMemory
+ (CURRENT_PROCESS, &Base, 0, &RegionSize, MEM_COMMIT,
PAGE_READWRITE);
+ if (!NT_SUCCESS(Status)) return NULL;
+ Hdr = (KdbpMallocHeader*)Base;
+ Hdr->Mdl = IoAllocateMdl(Base, RegionSize, FALSE, FALSE, NULL);
+ if (!Hdr->Mdl) {
+ NtFreeVirtualMemory(CURRENT_PROCESS, &Base, &RegionSize,
MEM_RELEASE);
+ return NULL;
+ }
+ Hdr->Size = RegionSize;
+ Hdr->OriginalMapping = Base;
+ MmProbeAndLockPages(Hdr->Mdl, KernelMode, IoModifyAccess);
+ KdbpMallocHeader *MappedHdr =
(KdbpMallocHeader*)MmMapLockedPages(Hdr->Mdl, KernelMode);
+ if (!MappedHdr) {
+ MmUnlockPages(Hdr->Mdl);
+ IoFreeMdl(Hdr->Mdl);
+ NtFreeVirtualMemory(CURRENT_PROCESS, &Base, &RegionSize,
MEM_RELEASE);
+ return NULL;
+ }
+ return &Hdr[1];
+ }
}
static VOID KdbpSymFreeMem(PVOID Area)
{
- return ExFreePool(Area);
+ PCHAR HdrPtr = ((PCHAR)Area) - sizeof(KdbpMallocHeader);
+ KdbpMallocHeader *Hdr = (KdbpMallocHeader*)HdrPtr;
+ if (Hdr->Size < PAGE_SIZE)
+ {
+ ExFreePool(Hdr);
+ }
+ else
+ {
+ PMDL Mdl = Hdr->Mdl;
+ PVOID BaseAddress = Hdr->OriginalMapping;
+ SIZE_T RegionSize = Hdr->Size;
+ MmUnmapLockedPages(Hdr, Mdl);
+ MmUnlockPages(Mdl);
+ NtFreeVirtualMemory(CURRENT_PROCESS, &BaseAddress, &RegionSize,
MEM_RELEASE);
+ IoFreeMdl(Mdl);
+ }
}
static BOOLEAN KdbpSymReadMem(PVOID FileContext, PVOID TargetDebug, PVOID
SourceMem, ULONG Size)
