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Added some more descriptive comments.

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svn path=/trunk/; revision=2204
This commit is contained in:
David Welch 2001-08-30 19:48:21 +00:00
parent 0c52657980
commit 888fe38dca
2 changed files with 42 additions and 8 deletions
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8
reactos/ntoskrnl/ke/i386/tskswitch.S
View file

@ -44,7 +44,7 @@ _Ki386ContextSwitch:
movl %esp, %ebp
/*
* Save callee save register
* Save callee save registers.
*/
pushl %ebx
pushl %esi
@ -56,7 +56,7 @@ _Ki386ContextSwitch:
cli
/*
* Get the pointer to the new thread
* Get the pointer to the new thread.
*/
movl 8(%ebp), %ebx
@ -72,13 +72,13 @@ _Ki386ContextSwitch:
popl %ebx
/*
* Load the PCR selector
* Load the PCR selector.
*/
movl $PCR_SELECTOR, %eax
movl %eax, %fs
/*
* Set the current thread information in the PCR
* Set the current thread information in the PCR.
*/
movl %ebx, %fs:KPCR_CURRENT_THREAD

42
reactos/ntoskrnl/nt/profile.c
View file

@ -39,6 +39,9 @@
/* TYPES ********************************************************************/
typedef struct _KPROCESS_PROFILE
/*
* List of the profile data structures associated with a process.
*/
{
LIST_ENTRY ProfileListHead;
LIST_ENTRY ListEntry;
@ -46,18 +49,44 @@ typedef struct _KPROCESS_PROFILE
} KPROCESS_PROFILE, *PKPROCESS_PROFILE;
typedef struct _KPROFILE
/*
* Describes a contiguous region of process memory that is being profiled.
*/
{
CSHORT Type;
CSHORT Name;
LIST_ENTRY ListEntry;
/* Entry in the list of profile data structures for this process. */
LIST_ENTRY ListEntry;
/* Base of the region being profiled. */
PVOID Base;
/* Size of the region being profiled. */
ULONG Size;
/* Shift of offsets from the region to buckets in the profiling buffer. */
ULONG BucketShift;
/* MDL which described the buffer that receives profiling data. */
PMDL BufferMdl;
/* System alias for the profiling buffer. */
PULONG Buffer;
/* Size of the buffer for profiling data. */
ULONG BufferSize;
/*
* Mask of processors for which profiling data should be collected.
* Currently unused.
*/
ULONG ProcessorMask;
/* TRUE if profiling has been started for this region. */
BOOLEAN Started;
/* Pointer (and reference) to the process which is being profiled. */
PEPROCESS Process;
} KPROFILE, *PKPROFILE;
@ -72,7 +101,7 @@ static GENERIC_MAPPING ExpProfileMapping = {
STANDARD_RIGHTS_ALL};
/*
* Size of the profile hash table
* Size of the profile hash table.
*/
#define PROFILE_HASH_TABLE_SIZE (32)
@ -82,15 +111,19 @@ static GENERIC_MAPPING ExpProfileMapping = {
static LIST_ENTRY ProcessProfileListHashTable[PROFILE_HASH_TABLE_SIZE];
/*
* Head of the list of profile data structures for the kernel
* Head of the list of profile data structures for the kernel.
*/
static LIST_ENTRY SystemProfileList;
/*
* Lock that protects the profiling data structures
* Lock that protects the profiling data structures.
*/
static KSPIN_LOCK ProfileListLock;
/*
* Timer interrupts happen before we have initialized the profiling
* data structures so just ignore them before that.
*/
static BOOLEAN ProfileInitDone = FALSE;
/* FUNCTIONS *****************************************************************/
@ -397,6 +430,7 @@ NtCreateProfile(OUT PHANDLE UnsafeProfileHandle,
else
{
Process = NULL;
/* FIXME: Check privilege. */
}
/*