RtlCreateHeap (
IN ULONG Flags,
IN PVOID HeapBase OPTIONAL,
IN SIZE_T ReserveSize OPTIONAL,
IN SIZE_T CommitSize OPTIONAL,
IN PVOID Lock OPTIONAL,
IN PRTL_HEAP_PARAMETERS Parameters OPTIONAL
)
//
// If the caller does not want to skip heap validiation checks then we
// need to validate the rest of the flags but simply masking out only
// those flags that want on a create heap call
//
//
// If nt global flags tells us to always do tail or free checking
// or to disable coalescing then force those bits set in the user
// specified flags
//
if (NtGlobalFlag & FLG_HEAP_ENABLE_TAIL_CHECK) {
Flags |= HEAP_TAIL_CHECKING_ENABLED;
}
if (NtGlobalFlag & FLG_HEAP_ENABLE_FREE_CHECK) {
Flags |= HEAP_FREE_CHECKING_ENABLED;
}
if (NtGlobalFlag & FLG_HEAP_DISABLE_COALESCING) {
Flags |= HEAP_DISABLE_COALESCE_ON_FREE;
}
//
// In the non kernel case we also check if we should
// validate parameters, validate all, or do stack backtraces
//
Peb = NtCurrentPeb();
if (NtGlobalFlag & FLG_HEAP_VALIDATE_PARAMETERS) {
Flags |= HEAP_VALIDATE_PARAMETERS_ENABLED;
}
if (NtGlobalFlag & FLG_HEAP_VALIDATE_ALL) {
Flags |= HEAP_VALIDATE_ALL_ENABLED;
}
if (NtGlobalFlag & FLG_USER_STACK_TRACE_DB) {
Flags |= HEAP_CAPTURE_STACK_BACKTRACES;
}
/* 测试NtGlobalFlag */
........
#ifndef NTOS_KERNEL_RUNTIME
//
// In the non kernel case check if we are creating a debug heap
// the test checks that skip validation checks is false.
//
VOID
LdrpInitialize (
IN PCONTEXT Context,
IN PVOID SystemArgument1,
IN PVOID SystemArgument2
)
Routine Description:
This function is called as a User-Mode APC routine as the first
user-mode code executed by a new thread. It's function is to initialize
loader context, perform module initialization callouts...
......
//#if DBG
if (TRUE)
//#else
// if (Peb->BeingDebugged || Peb->ReadImageFileExecOptions)
//#endif
{
PWSTR pw;
//
// Hack for NT4 SP4. So we don't overload another GlobalFlag
// bit that we have to be "compatible" with for NT5, look for
// another value named "DisableHeapLookaside".
//
//
// We will enable page heap (RtlpDebugPageHeap) only after
// all other initializations for page heap are finished.
//
//
// If page heap is enabled we need to disable any flag that
// might force creation of debug heaps for normal NT heaps.
// This is due to a dependency between page heap and NT heap
// where the page heap within PageHeapCreate tries to create
// a normal NT heap to accomodate some of the allocations.
// If we do not disable these flags we will get an infinite
// recursion between RtlpDebugPageHeapCreate and RtlCreateHeap.
//
