JPH02181845A - Malfunctional memory free state prevention system for memory during use - Google Patents
Malfunctional memory free state prevention system for memory during useInfo
- Publication number
- JPH02181845A JPH02181845A JP1001807A JP180789A JPH02181845A JP H02181845 A JPH02181845 A JP H02181845A JP 1001807 A JP1001807 A JP 1001807A JP 180789 A JP180789 A JP 180789A JP H02181845 A JPH02181845 A JP H02181845A
- Authority
- JP
- Japan
- Prior art keywords
- memory
- free state
- free
- attribute
- memory area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000002265 prevention Effects 0.000 title description 4
- 230000007257 malfunction Effects 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は使用中メモリの誤動作フリー防止方式に関し、
特にメモリの動的な確保・解放機構を有する計算機シス
テムにおいて使用中メモリの誤ったフリー状態を防止す
る使用中メモリの誤動作フリー防止方式に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for preventing malfunctions of memory in use,
In particular, the present invention relates to a method for preventing erroneous freeing of in-use memory, which prevents in-use memory from being erroneously freed in a computer system having a dynamic memory allocation/release mechanism.
従来、メモリの動的な確保・解放機構を有する計算機シ
ステムにおいては、誤動作によるメモリ・フリーに対す
る防御機構がなく、指定されたメモリは無条件にフリー
状態にしていた。Conventionally, in computer systems having a mechanism for dynamically allocating and releasing memory, there was no mechanism to protect against memory freeing due to malfunction, and designated memory was left unconditionally in a free state.
上述した従来の使用中メモリの誤動作フリー防止方式は
、使用中のメモリが誤ってフリー状態にされ、システム
全体に重大な障害を発生させるという問題点があった。The above-described conventional method for preventing malfunctions of memory in use has a problem in that the memory in use is erroneously set free, causing serious problems in the entire system.
本発明の目的は、使用中のメモリが誤ってフリー状態に
される危険性が大きい区間などでは、ユーザがメモリ・
フリーを禁止することができる使用中メモリの誤動作フ
リー防止方式を提供することにある。An object of the present invention is to allow the user to save the memory in areas where there is a high risk that the memory in use will be accidentally made free.
An object of the present invention is to provide a method for preventing malfunction of a memory in use that can prohibit freeing.
本発明の使用中メモリの誤動作フリー防止方式は、メモ
リの動的な確保・解放機構を有する計算機システムの使
用中メモリの誤動作フリー防止方式において、メモリが
フリー状尽になることを禁止するメモリ・フリー禁止属
性を付与してメモリを確保するフリー禁止メモリ確保手
段と、付与した前記メモリ・フリー禁止属性を取消す属
性消去手段と、メモリ・フリー要求時に前記メモリ・フ
リー禁止属性のないメモリだけをフリー状態にできるメ
モリ・フリー手段とを備えて構成されている。The method for preventing malfunction freeing of memory in use of the present invention is a method for preventing malfunction freeing of memory in use in a computer system having a dynamic memory allocation/release mechanism. A free-prohibited memory securing means for securing memory by assigning a free-prohibiting attribute; an attribute erasing means for canceling the assigned memory-free-prohibiting attribute; and a free-prohibiting memory that only frees memory without the memory free-prohibiting attribute when a memory freeing request is made. and memory free means that can be set to a state.
次に、本発明の実施例について図面を参照して説明する
。Next, embodiments of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例のブロック図である。FIG. 1 is a block diagram of one embodiment of the present invention.
第１図に示す使用中メモリの誤動作フリー防止方式は、
メモリ・フリー禁止属性を対象となるメモリ領域６に付
与しメモリ領域を確保するフリー禁止メモリ確保手段２
、メモリ領域６に付与されたメモリ・フリー禁止属性を
取消す属性消去手段３、メモリ・フリー要求時にメモリ
・フリー禁止属性のないメモリ領域だけをフリー状態に
できるメモリ・フリー手段４から構成されている。The malfunction-free prevention method for the memory in use shown in Figure 1 is as follows:
Free prohibition memory securing means 2 that assigns a memory free prohibition attribute to the target memory area 6 and secures the memory area
, an attribute erasing means 3 for canceling the memory free prohibition attribute given to the memory area 6, and a memory free means 4 for freeing only the memory area without the memory free prohibition attribute when a memory free request is made. .
次に、動作を説明する。Next, the operation will be explained.
ユーザーは、使用するメモリ領域６が誤ってフリー状態
にされる危険性が大きいか又は、人出力バッファとして
使用するなど誤ってフリー状態にされた場合の影響範囲
が大きいときに、誤動作によりメモリ領域６がフリー状
態になることを防ぐためのメモリ・フリー防止が必要で
あると判断したら、フリー禁止メモリ確保手段２により
メモリ・フリー禁止属性をメモリ領域６に付与しメモリ
領域６を確保する。フリー禁止メモリ確保手段２はメモ
リ領域を確保した後、メモリ領域６の属性フラグ５にメ
モリ・フリー禁止属性を表示する。その後、ユーザーは
メモリ・フリー防止が特に必要でなくなった時点で属性
消去手段３によりメモリ領域６の属性フラグ５のメモリ
・フリー禁止属性表示を取消す。If the user is using the memory area 6 due to a malfunction when there is a high risk of the memory area 6 being used being accidentally set free, or when the range of impact if the memory area 6 is accidentally set free is large, such as when the memory area 6 is used as a human output buffer, If it is determined that memory free prevention is necessary to prevent the memory area 6 from becoming free, the free prohibition memory securing means 2 assigns a memory free prohibition attribute to the memory area 6 to secure the memory area 6. After securing the memory area, the free prohibition memory securing means 2 displays the memory free prohibition attribute in the attribute flag 5 of the memory area 6. Thereafter, when the memory free prevention is no longer particularly necessary, the user cancels the display of the memory free prohibition attribute of the attribute flag 5 of the memory area 6 using the attribute erasing means 3.
一方、ユーザーは確保したメモリ領域６をフリー状態に
しようとするときは、メモリ・フリー手段４を呼び出す
。メモリ・フリー手段４はメモリ・フリー禁止の対象と
なるメモリ領域６の属性フラグ５を調べ、メモリ・フリ
ー禁止属性が表示されていなければユーザーの要求通り
７メモリ領域６をフリー状態にするが、メモリ・フリー
禁止属性が表示されているときにはメモリ・フリー要求
を拒否する。On the other hand, when the user wishes to free the secured memory area 6, he calls the memory freeing means 4. The memory freeing means 4 checks the attribute flag 5 of the memory area 6 that is the target of memory freeing prohibition, and if the memory freeing prohibition attribute is not displayed, it frees the memory area 6 as requested by the user. When the memory free prohibition attribute is displayed, the memory free request is rejected.
以上説明したように、本発明は、使用中のメモリが誤っ
てフリー状態にされる危険性が大きい区間などでは、ユ
ーザがメモリ・フリーを禁止することができ、誤動作に
よるメモリ・フリーを防止することができるという効果
を有する。As explained above, the present invention allows the user to prohibit memory freeing in sections where there is a high risk that the memory in use will be erroneously set free, thereby preventing memory freeing due to malfunction. It has the effect of being able to
消去手段、４・・・・・・メモリ・フリー手段、５・・
・・・・属性フラグ、６・・・・・・メモリ領域。Erasing means, 4...Memory freeing means, 5...
...Attribute flag, 6...Memory area.
Claims (1)
の使用中メモリの誤動作フリー防止方式において、メモ
リがフリー状態になることを禁止するメモリ・フリー禁
止属性を付与してメモリを確保するフリー禁止メモリ確
保手段と、付与した前記メモリ・フリー禁止属性を取消
す属性消去手段と、メモリ・フリー要求時に前記メモリ
・フリー禁止属性のないメモリだけをフリー状態にでき
るメモリ・フリー手段とを備えたことを特徴とする使用
中メモリの誤動作フリー防止方式。Free-prohibited memory that secures memory by adding a memory-free prohibition attribute that prohibits the memory from becoming free, in a method for preventing malfunctions of memory during use in a computer system that has a dynamic memory allocation and release mechanism. The present invention is characterized by comprising a securing means, an attribute erasing means for canceling the assigned memory free prohibition attribute, and a memory free means capable of freeing only the memory without the memory free prohibition attribute when a memory free request is made. This is a method to prevent memory in use from malfunctioning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1001807A JPH02181845A (en) | 1989-01-06 | 1989-01-06 | Malfunctional memory free state prevention system for memory during use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1001807A JPH02181845A (en) | 1989-01-06 | 1989-01-06 | Malfunctional memory free state prevention system for memory during use |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02181845A true JPH02181845A (en) | 1990-07-16 |
Family
ID=11511844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1001807A Pending JPH02181845A (en) | 1989-01-06 | 1989-01-06 | Malfunctional memory free state prevention system for memory during use |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02181845A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013214154A (en) * | 2012-03-30 | 2013-10-17 | Fujitsu Ltd | Information processing device, information processing device control method, and information processing device control program |
-
1989
- 1989-01-06 JP JP1001807A patent/JPH02181845A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013214154A (en) * | 2012-03-30 | 2013-10-17 | Fujitsu Ltd | Information processing device, information processing device control method, and information processing device control program |
| US8910004B2 (en) | 2012-03-30 | 2014-12-09 | Fujitsu Limited | Information processing apparatus, and method of controlling information processing apparatus |
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