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|
;; Licensed to the .NET Foundation under one or more agreements.
;; The .NET Foundation licenses this file to you under the MIT license.
;; See the LICENSE file in the project root for more information.
.586
.model flat
option casemap:none
.code
include AsmMacros.inc
;; Allocate non-array, non-finalizable object. If the allocation doesn't fit into the current thread's
;; allocation context then automatically fallback to the slow allocation path.
;; ECX == EEType
FASTCALL_FUNC RhpNewFast, 4
;; edx = GetThread(), TRASHES eax
INLINE_GETTHREAD edx, eax
;;
;; ecx contains EEType pointer
;;
mov eax, [ecx + OFFSETOF__EEType__m_uBaseSize]
;;
;; eax: base size
;; ecx: EEType pointer
;; edx: Thread pointer
;;
add eax, [edx + OFFSETOF__Thread__m_alloc_context__alloc_ptr]
cmp eax, [edx + OFFSETOF__Thread__m_alloc_context__alloc_limit]
ja AllocFailed
;; set the new alloc pointer
mov [edx + OFFSETOF__Thread__m_alloc_context__alloc_ptr], eax
;; calc the new object pointer
sub eax, [ecx + OFFSETOF__EEType__m_uBaseSize]
;; set the new object's EEType pointer
mov [eax], ecx
ret
AllocFailed:
;;
;; SLOW PATH, call RhpGcAlloc(EEType *pEEType, UInt32 uFlags, UIntNative cbSize, void * pTransitionFrame)
;;
;; ecx: EEType pointer
;;
push ebp
mov ebp, esp
PUSH_COOP_PINVOKE_FRAME edx
;; Preserve EEType in ESI.
mov esi, ecx
;; Push alloc helper arguments
push edx ; transition frame
push dword ptr [ecx + OFFSETOF__EEType__m_uBaseSize] ; Size
xor edx, edx ; Flags
;; Passing EEType in ecx
;; void* RhpGcAlloc(EEType *pEEType, UInt32 uFlags, UIntNative cbSize, void * pTransitionFrame)
call RhpGcAlloc
;; Set the new object's EEType pointer on success.
test eax, eax
jz NewFast_OOM
mov [eax + OFFSETOF__Object__m_pEEType], esi
;; If the object is bigger than RH_LARGE_OBJECT_SIZE, we must publish it to the BGC
mov edx, [esi + OFFSETOF__EEType__m_uBaseSize]
cmp edx, RH_LARGE_OBJECT_SIZE
jb NewFast_SkipPublish
mov ecx, eax ;; ecx: object
;; edx: already contains object size
call RhpPublishObject ;; eax: this function returns the object that was passed-in
NewFast_SkipPublish:
POP_COOP_PINVOKE_FRAME
pop ebp
ret
NewFast_OOM:
;; This is the failure path. We're going to tail-call to a managed helper that will throw
;; an out of memory exception that the caller of this allocator understands.
mov eax, esi ; Preserve EEType pointer over POP_COOP_PINVOKE_FRAME
POP_COOP_PINVOKE_FRAME
;; Cleanup our ebp frame
pop ebp
mov ecx, eax ; EEType pointer
xor edx, edx ; Indicate that we should throw OOM.
jmp RhExceptionHandling_FailedAllocation
FASTCALL_ENDFUNC
;; Allocate non-array object with finalizer.
;; ECX == EEType
FASTCALL_FUNC RhpNewFinalizable, 4
;; Create EBP frame.
push ebp
mov ebp, esp
PUSH_COOP_PINVOKE_FRAME edx
;; Preserve EEType in ESI
mov esi, ecx
;; Push alloc helper arguments
push edx ; transition frame
push dword ptr [ecx + OFFSETOF__EEType__m_uBaseSize] ; Size
mov edx, GC_ALLOC_FINALIZE ; Flags
;; Passing EEType in ecx
;; void* RhpGcAlloc(EEType *pEEType, UInt32 uFlags, UIntNative cbSize, void * pTransitionFrame)
call RhpGcAlloc
;; Set the new object's EEType pointer on success.
test eax, eax
jz NewFinalizable_OOM
mov [eax + OFFSETOF__Object__m_pEEType], esi
;; If the object is bigger than RH_LARGE_OBJECT_SIZE, we must publish it to the BGC
mov edx, [esi + OFFSETOF__EEType__m_uBaseSize]
cmp edx, RH_LARGE_OBJECT_SIZE
jb NewFinalizable_SkipPublish
mov ecx, eax ;; ecx: object
;; edx: already contains object size
call RhpPublishObject ;; eax: this function returns the object that was passed-in
NewFinalizable_SkipPublish:
POP_COOP_PINVOKE_FRAME
;; Collapse EBP frame and return
pop ebp
ret
NewFinalizable_OOM:
;; This is the failure path. We're going to tail-call to a managed helper that will throw
;; an out of memory exception that the caller of this allocator understands.
mov eax, esi ; Preserve EEType pointer over POP_COOP_PINVOKE_FRAME
POP_COOP_PINVOKE_FRAME
;; Cleanup our ebp frame
pop ebp
mov ecx, eax ; EEType pointer
xor edx, edx ; Indicate that we should throw OOM.
jmp RhExceptionHandling_FailedAllocation
FASTCALL_ENDFUNC
;; Allocate a new string.
;; ECX == EEType
;; EDX == element count
FASTCALL_FUNC RhNewString, 8
push ecx
push edx
;; Make sure computing the aligned overall allocation size won't overflow
cmp edx, ((0FFFFFFFFh - STRING_BASE_SIZE - 3) / STRING_COMPONENT_SIZE)
ja StringSizeOverflow
; Compute overall allocation size (align(base size + (element size * elements), 4)).
lea eax, [(edx * STRING_COMPONENT_SIZE) + (STRING_BASE_SIZE + 3)]
and eax, -4
; ECX == EEType
; EAX == allocation size
; EDX == scratch
INLINE_GETTHREAD edx, ecx ; edx = GetThread(), TRASHES ecx
; ECX == scratch
; EAX == allocation size
; EDX == thread
mov ecx, eax
add eax, [edx + OFFSETOF__Thread__m_alloc_context__alloc_ptr]
jc StringAllocContextOverflow
cmp eax, [edx + OFFSETOF__Thread__m_alloc_context__alloc_limit]
ja StringAllocContextOverflow
; ECX == allocation size
; EAX == new alloc ptr
; EDX == thread
; set the new alloc pointer
mov [edx + OFFSETOF__Thread__m_alloc_context__alloc_ptr], eax
; calc the new object pointer
sub eax, ecx
pop edx
pop ecx
; set the new object's EEType pointer and element count
mov [eax + OFFSETOF__Object__m_pEEType], ecx
mov [eax + OFFSETOF__String__m_Length], edx
ret
StringAllocContextOverflow:
; ECX == string size
; original ECX pushed
; original EDX pushed
; Re-push original ECX
push [esp + 4]
; Create EBP frame.
mov [esp + 8], ebp
lea ebp, [esp + 8]
PUSH_COOP_PINVOKE_FRAME edx
; Preserve the string size in edi
mov edi, ecx
; Get the EEType and put it in ecx.
mov ecx, dword ptr [ebp - 8]
; Push alloc helper arguments (thread, size, flags, EEType).
push edx ; transition frame
push edi ; Size
xor edx, edx ; Flags
;; Passing EEType in ecx
;; void* RhpGcAlloc(EEType *pEEType, UInt32 uFlags, UIntNative cbSize, void * pTransitionFrame)
call RhpGcAlloc
; Set the new object's EEType pointer and length on success.
test eax, eax
jz StringOutOfMemoryWithFrame
mov ecx, [ebp - 8]
mov edx, [ebp - 4]
mov [eax + OFFSETOF__Object__m_pEEType], ecx
mov [eax + OFFSETOF__String__m_Length], edx
;; If the object is bigger than RH_LARGE_OBJECT_SIZE, we must publish it to the BGC
cmp edi, RH_LARGE_OBJECT_SIZE
jb NewString_SkipPublish
mov ecx, eax ;; ecx: object
mov edx, edi ;; edx: object size
call RhpPublishObject ;; eax: this function returns the object that was passed-in
NewString_SkipPublish:
POP_COOP_PINVOKE_FRAME
add esp, 8 ; pop ecx / edx
pop ebp
ret
StringOutOfMemoryWithFrame:
; This is the OOM failure path. We're going to tail-call to a managed helper that will throw
; an out of memory exception that the caller of this allocator understands.
mov eax, [ebp - 8] ; Preserve EEType pointer over POP_COOP_PINVOKE_FRAME
POP_COOP_PINVOKE_FRAME
add esp, 8 ; pop ecx / edx
pop ebp ; restore ebp
mov ecx, eax ; EEType pointer
xor edx, edx ; Indicate that we should throw OOM.
jmp RhExceptionHandling_FailedAllocation
StringSizeOverflow:
;; We get here if the size of the final string object can't be represented as an unsigned
;; 32-bit value. We're going to tail-call to a managed helper that will throw
;; an OOM exception that the caller of this allocator understands.
add esp, 8 ; pop ecx / edx
;; ecx holds EEType pointer already
xor edx, edx ; Indicate that we should throw OOM.
jmp RhExceptionHandling_FailedAllocation
FASTCALL_ENDFUNC
;; Allocate one dimensional, zero based array (SZARRAY).
;; ECX == EEType
;; EDX == element count
FASTCALL_FUNC RhpNewArray, 8
push ecx
push edx
; Compute overall allocation size (align(base size + (element size * elements), 4)).
; if the element count is <= 0x10000, no overflow is possible because the component size is
; <= 0xffff, and thus the product is <= 0xffff0000, and the base size for the worst case
; (32 dimensional MdArray) is less than 0xffff.
movzx eax, word ptr [ecx + OFFSETOF__EEType__m_usComponentSize]
cmp edx,010000h
ja ArraySizeBig
mul edx
add eax, [ecx + OFFSETOF__EEType__m_uBaseSize]
add eax, 3
ArrayAlignSize:
and eax, -4
; ECX == EEType
; EAX == array size
; EDX == scratch
INLINE_GETTHREAD edx, ecx ; edx = GetThread(), TRASHES ecx
; ECX == scratch
; EAX == array size
; EDX == thread
mov ecx, eax
add eax, [edx + OFFSETOF__Thread__m_alloc_context__alloc_ptr]
jc ArrayAllocContextOverflow
cmp eax, [edx + OFFSETOF__Thread__m_alloc_context__alloc_limit]
ja ArrayAllocContextOverflow
; ECX == array size
; EAX == new alloc ptr
; EDX == thread
; set the new alloc pointer
mov [edx + OFFSETOF__Thread__m_alloc_context__alloc_ptr], eax
; calc the new object pointer
sub eax, ecx
pop edx
pop ecx
; set the new object's EEType pointer and element count
mov [eax + OFFSETOF__Object__m_pEEType], ecx
mov [eax + OFFSETOF__Array__m_Length], edx
ret
ArraySizeBig:
; Compute overall allocation size (align(base size + (element size * elements), 4)).
; if the element count is negative, it's an overflow, otherwise it's out of memory
cmp edx, 0
jl ArraySizeOverflow
mul edx
jc ArrayOutOfMemoryNoFrame
add eax, [ecx + OFFSETOF__EEType__m_uBaseSize]
jc ArrayOutOfMemoryNoFrame
add eax, 3
jc ArrayOutOfMemoryNoFrame
jmp ArrayAlignSize
ArrayAllocContextOverflow:
; ECX == array size
; original ECX pushed
; original EDX pushed
; Re-push original ECX
push [esp + 4]
; Create EBP frame.
mov [esp + 8], ebp
lea ebp, [esp + 8]
PUSH_COOP_PINVOKE_FRAME edx
; Preserve the array size in edi
mov edi, ecx
; Get the EEType and put it in ecx.
mov ecx, dword ptr [ebp - 8]
; Push alloc helper arguments (thread, size, flags, EEType).
push edx ; transition frame
push edi ; Size
xor edx, edx ; Flags
;; Passing EEType in ecx
;; void* RhpGcAlloc(EEType *pEEType, UInt32 uFlags, UIntNative cbSize, void * pTransitionFrame)
call RhpGcAlloc
; Set the new object's EEType pointer and length on success.
test eax, eax
jz ArrayOutOfMemoryWithFrame
mov ecx, [ebp - 8]
mov edx, [ebp - 4]
mov [eax + OFFSETOF__Object__m_pEEType], ecx
mov [eax + OFFSETOF__Array__m_Length], edx
;; If the object is bigger than RH_LARGE_OBJECT_SIZE, we must publish it to the BGC
cmp edi, RH_LARGE_OBJECT_SIZE
jb NewArray_SkipPublish
mov ecx, eax ;; ecx: object
mov edx, edi ;; edx: object size
call RhpPublishObject ;; eax: this function returns the object that was passed-in
NewArray_SkipPublish:
POP_COOP_PINVOKE_FRAME
add esp, 8 ; pop ecx / edx
pop ebp
ret
ArrayOutOfMemoryWithFrame:
; This is the OOM failure path. We're going to tail-call to a managed helper that will throw
; an out of memory exception that the caller of this allocator understands.
mov eax, [ebp - 8] ; Preserve EEType pointer over POP_COOP_PINVOKE_FRAME
POP_COOP_PINVOKE_FRAME
add esp, 8 ; pop ecx / edx
pop ebp ; restore ebp
mov ecx, eax ; EEType pointer
xor edx, edx ; Indicate that we should throw OOM.
jmp RhExceptionHandling_FailedAllocation
ArrayOutOfMemoryNoFrame:
add esp, 8 ; pop ecx / edx
; ecx holds EEType pointer already
xor edx, edx ; Indicate that we should throw OOM.
jmp RhExceptionHandling_FailedAllocation
ArraySizeOverflow:
; We get here if the size of the final array object can't be represented as an unsigned
; 32-bit value. We're going to tail-call to a managed helper that will throw
; an overflow exception that the caller of this allocator understands.
add esp, 8 ; pop ecx / edx
; ecx holds EEType pointer already
mov edx, 1 ; Indicate that we should throw OverflowException
jmp RhExceptionHandling_FailedAllocation
FASTCALL_ENDFUNC
end
|
