JP2005332421A - Memory dump device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a memory dump device for an information processing unit that facilitates the processing for registration and canceling of a dump target area, and to reduce the size of dump target area information. <P>SOLUTION: In a system in which a user predesignates a memory object at the occurrence of failure in an information processing unit, there are provided an area setting means for dividing memory targeted for a dump into sections of predetermined sizes and for setting an on/off bit indicating whether a dump output is necessary or not for each of the divided areas; a memory dump analyzing means for outputting information on the memory corresponding to a specified bit to an external dump file at the occurrence of failure, and a dump file analyzing means for sequentially outputting the outputted information on the memory for the specified divided areas. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a memory dump method in an information processing apparatus, and more particularly to a method for dumping a part of main memory contents in a system dump when a failure occurs.

Conventionally, as a memory dump method at the time of failure of an information processing device, it is common to save all the main memory contents at the time of failure in a secondary storage device.
In order to improve this, there is a method disclosed in Japanese Patent Laid-Open No. 2-186451 shown in FIG. 25 for the purpose of reducing the capacity of a secondary storage device for storing a memory dump and shortening the memory dump execution time. In the example of FIG. 25, when a failure of the information processing apparatus is detected, the failure detection unit 105 instructs the failure information selection unit 104, and the failure selection unit 104 creates the failure information list 107 according to the failure detection location and the type of failure. To do. Next, the failure detection unit 105 instructs the memory dump collection unit 106, and the memory dump collection unit 106 stores the information 103 necessary for failure analysis in the main storage device 102 from the failure information list 107 in the dump file 108. The data in the main storage device to be saved is reduced.

As a second conventional example in which the user sets the dump area address and dump size in advance, the dump area address and size are set in advance as described in JP-A-5-257761 shown in FIG. There was a way to do a memory dump based on that setting.
In the method shown in the figure, in order to analyze when a program ends abnormally, an area A and the like, an address, and a size are set in the dump output table 1101 in advance in a virtual storage space corresponding to the program. When the program ends abnormally, etc., the dump area selection unit 1103 notifies the dump output unit 1104 only of the area registered at the present time according to the operation flow shown in FIG. Area is dumped.
However, this method does not have a procedure for storing the dump output management table in the dump file. This seems to be the premise that the person who analyzes the dump file is familiar with the contents and can freely specify the dump area. However, this assumption does not hold in large-scale systems, and the dump file analyst cannot always specify the dump area. Furthermore, there is no mention of a relationship with a new registration that may overlap with a dump area already registered in the dump file.
Japanese Patent Laid-Open No. 02-186451 Japanese Patent Laid-Open No. 05-257771 JP 62-065146 A JP-A-62-212743 Japanese Patent Laid-Open No. 04-346139 Japanese Patent Laid-Open No. 02-282838 JP 2000-029750 A Japanese Patent Laid-Open No. 02-186457

In the above-described conventional memory dump method, information required for failure analysis is selected when a failure is detected, and a failure information list is created. There is a problem that it is not always possible to obtain such a region.
In addition, since a list of information necessary for failure analysis is stored in the failure information list, the failure information list created by the failure information selection means is required to analyze the dump file. When the failure information selection means creates the failure information list, there is a problem that the user cannot freely set the memory dump area.
In the method in which the user designates an area, it is not considered to avoid duplication of dump areas.
Furthermore, in an information processing device with a virtual storage function, if a failure occurs due to a program that operates on a virtual address, it is necessary to analyze it using the virtual address in order to analyze the failure using a dump file. There was no such mechanism.
Furthermore, there is no dump output management table that directly specifies the dump area in the dump file, and the dump file analyst cannot determine what data the dump file data is.

  The present invention has been made to solve the above-described problems, and provides a memory dump device for an information processing device that can facilitate the process of registering and releasing a dump target area. Furthermore, the size of dump target area information is reduced.

A memory dump device according to the present invention is a memory dump device for dumping information stored in a memory of an information processing device.
A dump target area information file that stores as a dump target area information a set of page correspondence information that indicates whether each page area divided into a certain size is a dump target, and a dump when an error occurs in the information processing device The dump target area information stored in the target area information file is read, the set of page correspondence information is converted into dump target area information expressed as a combination of the first page number and the number of pages of the dump target area, and the converted dump target Memory dump means for outputting the area information and the area information stored in the dump target area of the memory indicated by the dump target area information as a dump file, and the first page of the dump target area information of the dump file output by the memory dump means Dump file that analyzes dump file area information by referring to the combination of number and page number Characterized by comprising an analysis means.

  Furthermore, the set of page correspondence information is a set of bits corresponding to a page area, and indicates whether the corresponding page area is a dump target by turning on / off the bits.

  According to the embodiment of the present invention, since the user-specified memory dump area is set by bits, there is an effect that a desired dump area can be easily output while avoiding duplication.

  Furthermore, since the conversion table of the virtual address and the real address is provided, there is an effect that the memory dump specifying the virtual address can be performed.

Embodiment 1 FIG.
Hereinafter, a basic idea of the present invention in which a user designates a memory dump area and reduces the dump amount will be described as a first embodiment with reference to the drawings.
FIG. 1 is a configuration diagram of an information processing apparatus according to Embodiment 1 of the present invention. In the figure, 1 is an OS, 2 is a memory, and 3 is a secondary storage device. The secondary storage device 3 includes a dump file 10 that stores memory contents at the time of failure. The OS 1 includes an area setting unit 11 activated by an instruction from the user, a failure detection unit 12 activated when a failure occurs, a memory dump unit 13 activated by an instruction from the failure detection unit, and an instruction from the user after the occurrence of the failure. And a dump target area information file 15 that holds information of a memory dump target area specified by the user. Further, the memory 2 includes a region A21, a region B22, and a region C23 that are memory dump target regions.
There are three inputs to the OS 1 in the figure, and “area setting” to the area setting means 11 is set in advance in principle. The “failure analysis” that activates the dump file analysis means 14 outputs it appropriately after a failure occurs.

FIG. 2 shows the structure of the dump target area information file 15. The dump target area information file 15 is configured by an array in which a head address (for example, 0x00001000) of each memory dump target area and a size (for example, an area of 0x1000 width) dumped from the head address are combined. In the dump target area information, an empty area (where no memory dump target area is registered) has an address of 0 and a size of -1. Here, the dump target area information is shown as an array. However, the dump target area information is the same even if it is configured by a list structure in which addresses and sizes are combined into one set.
FIG. 3 shows the structure of the dump file 10. The dump file 10 includes a dump target area information file 15 ′ storing the dump target area information file 15 in the OS 1, an area A21 ′ storing the contents of the area A21 on the memory, and an area storing the contents of the area B22 on the memory. B22 ′ and the area C23 ′ storing the contents of the area C23 on the memory.

Next, the operation of the memory dump device according to the present invention will be described with reference to FIGS. In the present embodiment, an example in which the area A21, the area B22, and the area C23 on the memory 2 are set as memory dump target areas is shown.
First, prior to occurrence of failure and failure analysis, the user instructs the region setting unit 11 to register the region A21 as a memory dump target region during the normal operation of the OS1. In response to this “area setting” instruction, the area setting means 11 calculates the address and size of the area A 21 in the memory, and registers the position information of the area A in the dump target area information file 15. In FIG. 2, the head address 0x00001000 is registered as the position information of the area A, and the 0x1000 width is registered in the index 0 of the memory dump target area information as the size of the dump area.
When the user registers the area B22 and the area C23 as the memory dump target area, the area setting unit 11 registers the position information of the area B22 and the area C23 in the dump target area information file 15 by the same process.

When a failure occurs in the information processing apparatus, the failure detection unit 12 first detects a failure as the memory dump device and activates the memory dump unit 13. The memory dump unit 13 first writes the contents of the dump target area information file 15 in the area of the dump target area information file 15 ′ of the dump file 10. Next, the memory dump target area in the memory 2 is written to the dump file 10 in accordance with the contents of the dump target area information file 15. In the present embodiment, since the addresses and sizes of the area A21, area B22, and area C23 in the memory 2 are registered in the dump target area information file 15, the memory dump means 13 uses the area A21 in the dump file 10. The contents of the area A21 in the memory 2 are written in the area ', the contents of the area B22 in the memory 2 are written in the area B22' in the dump file 10, and the memory 2 is written in the area C22 'in the dump file 10. The contents of the area C23 are written.
After the above operation, the information processing apparatus is restarted.

When the information processing apparatus is restarted, the user activates the dump file analysis means 14 in order to clarify the cause of the failure that has occurred in the information processing apparatus. When the user wants to refer to the contents of the area A21 in the memory 2 at the time of the failure, the dump file analysis means 14 refers to the dump target area information file 15 ′ in the dump file 10 and is stored in the dump file 10. The position and size of the area A21 ′ being stored are calculated, and the contents of the area A21 ′ in the dump file 10 are read and displayed to the user.
Similarly, when the user refers to the contents of the areas B22 and C23 in the memory 2 at the time of failure, the dump analysis means 14 refers to the dump target area information file 15 ′ in the dump file 10, and 10 calculates the position and size of the area B22 ′ and area C23 ′ stored in the area 10, reads the contents of the area B22 ′ and area C23 ′ in the dump file 10 and displays them to the user.

Next, the operation of the area setting unit 11 in the first embodiment will be described with reference to FIG.
First, the address and size of the area to be dumped are instructed by the user in S101. Next, in S102, whether the area specified in S101 has already been registered by referring to the registration area information in order from the top information (index 0 information in FIG. 2) of the dump target area information file 15 in the OS1. Search for. In S103, it is determined that the area specified in S101 does not overlap with the area registered in the dump target area information file 15, that is, the specified area is not registered in the dump target area information file 15. In S104, the address and size specified in S101 are set in the free area (address is 0, size is -1) in the dump target area information file 15 and the process is terminated.
If the area specified in S101 overlaps the area registered in the dump target area information file 15 in S103, the registered area that overlaps the area specified in S105 is deleted from the dump target area information file 15. Next, in S106, the address and size of the area including the deleted area and the area specified in S101 are set in the dump target area information file 15, and the process ends. For example, if the size 0X4000 is designated from address 0X00001500 as a new index 3 equivalent in FIG. 2, there is an area that overlaps the already registered area A and area B. 3 is registered from address 0X00001000 to size 07000.

Next, the operation of the memory dump unit 13 in the first embodiment will be described with reference to FIG.
First, in S111, the dump target area information file 15 is written into the dump file 10. In step S112, the registration area information at the head of the dump target area information file 15 is acquired. In the example of FIG. 2, the position information of the address 0x00001000 and the size 0x1000, that is, the position information of the area A21 is acquired. In step S113, it is checked whether the size information portion of the registration area information is -1. When the size information portion is -1, it means that the information area is free. However, since the dump target area information file 15 registers the areas in order from the top, it means that it is a free area. This means that there is no information registered in the subsequent areas. Therefore, in S113, when the size information portion of the registration area information is -1, the process is terminated.

  If the size of the registration area information is not −1 in S113, the corresponding area in the memory 2 is written in the dump file 10 from the address and size information of the registration area information in S114. Then, in S115, the next registration information of the dump target area information file 15 is acquired (if the current registration information is the index 0 information (area A21) of the dump target area information file 15, the index 1 information (area B22) is acquired), and the process returns to S113. By repeating S113 to S115 in this way, the contents of the area A21, the area B22, and the area C23 are written into the dump file 10.

Next, the operation of the dump file analyzing means 14 in the first embodiment will be described with reference to FIG.
The dump target area has already been registered, but in order to refer to a specific area in the area, in S121, the address and size of the area to be referred to are requested from the user. Normally, failure analysis starts with a small amount of specific data (such as a pointer to a variable or a character string). For example, the CPU register information is stored in 64 bytes from the address stored in the variable A in the kernel, and the address that the CPU was executing when the failure occurred in the instruction register area of the CPU register information. If the stack top address at the time of the failure is stored in the stack register area, the user analyzes the failure in the following procedure.
1) The contents of variable A are displayed in 4 bytes. The address where the CPU register information is stored is grasped. 2) The area where the contents output in 1) are the address is displayed for 64 bytes. The contents of the CPU register information is displayed. 3) 2) Display the area where the contents of the instruction register of the contents output in the address are used as an address. Understand the instruction executed at the time of the failure and the nearby instructions. 4) Address the contents of the instruction register of the contents output in 2). From the stack contents at the time of failure, grasp the variables that were operated at the time of failure. In this case, rather than outputting all the dump target areas, the areas of 1), 2), 3), 4) The analysis is easier if they are displayed in order.

  In this way, the address and size of the area to be displayed are instructed by the user in S121. In step S122, the dump target area information file 15 'at the head of the dump file 10 is acquired. In S123, the next read position from the dump file 10 is set to the final address + 1 of the dump target area information file 15 ', that is, the head of the area where the memory contents are stored. Next, in S124, the registration information at the head of the dump target area information file 15 'acquired in S122, that is, the address and size information in the memory 2 of the area A21' is acquired. Then, it is checked whether the size information portion of the registration information acquired in S125 is -1. When the size information portion is -1, it means that the information area is free. However, since the dump target area information file 15 registers the areas in order from the top, it means that it is a free area. This means that there is no information registered in the subsequent areas. Therefore, when the size information portion of the registration area information is −1 in S125, it is determined that the area to be displayed does not exist in the dump file 10, and the process proceeds to S126, an error is output, and the process is terminated.

If the size of the registration area information is not −1 in S125, it is determined in S127 whether the display area instructed in S121 is within the area indicated by the registration area information from the address and size information of the registration area information. If it is determined in S127 that the display area is not within the area indicated by the main registration area information, the process advances to S128, and the file position is advanced to the size described in the current file position + main registration area information. As a result, the file position is advanced to the head position of the area next to the currently registered registration area in the dump file 10. Next, in S129, the next registered area information of the dump target area information file 15 ′ is acquired, and the process returns to S125 to check the registered area information.
If it is determined in S127 that the display area is within the area indicated by the main registration area information, the memory contents corresponding to the main registration area information in the dump file 10 are acquired from the file position information in S130. In S131, the data in the display area is displayed from the acquired dump contents, and the process ends.

  In the memory dump device in the information processing apparatus according to the first embodiment, dump target area information is provided in the OS, and the memory dump target area instructed by the user is registered in the dump target area information. Writes the information and writes the memory dump target area to the dump file based on the dump target area information. When analyzing the dump file, the memory contents in the dump file are displayed based on the dump target area information in the dump file. Thus, it is possible to obtain a memory dump device in an information processing apparatus that can omit the calculation of the dump target area at the time of memory dump, can display the memory contents without an external file such as a failure information list, and can specify the memory dump area by the user.

Embodiment 2. FIG.
An information processing apparatus according to another embodiment of the present invention in which the amount of information stored in the OS is reduced will be described. The configuration of the information processing apparatus is the same as that of the first embodiment and is shown in FIG.
FIG. 7 shows the structure of the dump target area information file 15 in the present embodiment. In the present embodiment, the memory 2 is divided into fixed sizes (pages), and the dump target area information file 15 is composed of a collection of bits corresponding to the divided areas. In the example of FIG. 7, the capacity of the memory 2 is 128 megabytes, the memory 2 is divided by 0x1000 bytes, that is, 4096 bytes, and the 0th bit of the dump target area information file 15 is assigned to the address 0x00000000-0x00000FFF of the memory 2 Are associated with addresses 0x00001000 to 0x00001FFF of the memory 2,..., 65535th bit are associated with addresses 0x0FFFF000 to 0x0FFFFFFF of the memory 2. If the corresponding area is set as a memory dump target area, the bit is turned ON, and if it is not the target area, the bit is turned OFF. For this reason, when areas similar to those in the first embodiment, that is, areas A, B, and C in FIG. 2, are set as memory dump target areas, the first bits 3-6 of the dump target area information file 15 are set. Bits 16 to 18 are turned ON, and the other bits are turned OFF.

Next, the operation of the area setting unit 11 in the second embodiment will be described with reference to FIG.
First, in S201, the user instructs whether to register the address, size, and area of the target area or cancel the registration. In step S202, the target area is converted into a page boundary, that is, the start address of the page to which the start address of the specified area belongs (if the start address of the specified area is 0x1121, The first address of the area is 0x1000), and the final address of the target area is the final address of the page to which the final address of the specified area belongs (if the final address of the specified area is 0x2021, the final address of the target area is 0x2FFF) Then, the size of the target area is calculated (when the start address of the specified area is 0x1121 and the size is 0xF01 (final address 0x2021), the start address of the target area is 0x1000 and the size is 0x2000 (final address 0x2FFF)) .

  Next, in S203, it is determined whether or not the instruction is registration of an area. If the instruction is area registration, the process proceeds to S204. In S204, the bit of the dump target area information file 15 corresponding to the page that is the target area is set to ON, and the process ends. For example, in the above-described area (start address 0x1121 size 0xF01), the target area is 0x00001000 to 0x00002FFF, so bit 1 and bit 2 of the dump target area information file 15 are turned ON. When the area B22 of the first embodiment is designated, the target area is 0x00003000 to 0x00006FFF, so bits 3 to 6 are turned ON.

  If the instruction is to cancel the registration of the area in S203, the process proceeds to S205. In step S205, the bit of the dump target area information file 15 corresponding to the page that is the target area is turned OFF, and the process ends. For example, when the area A21 in the first embodiment is designated, the target area is 0x00001000 to 0x00001FFF, so bit 1 is turned OFF. Further, when the area C23 of the first embodiment is designated, the target area is from 0x00010000 to 0x00012FFF, so bits 16 to 18 are turned OFF. As a result, in the dump target area information file 15, the part where the bit is ON is set as the memory dump target area, and the part where the bit is OFF is set as outside the memory dump target area.

Next, the operation of the memory dump unit 13 in the second embodiment will be described with reference to FIG.
First, in S211, the dump target area information file 15 is written into the dump file 10. Next, in S212, the first bit (0th bit in FIG. 7) of the dump target area information file 15 is referenced. Next, in S213, it is determined whether or not the bit exceeds the last bit. If the bit being referred exceeds the last bit (the 65535th bit in FIG. 7), the processing is terminated.

If the bit referenced in S213 does not exceed the last bit, it is checked in S214 whether the referenced bit is ON. If the bit is ON, the area corresponding to the bit is registered as a memory dump target area, so the process proceeds to S215, and the area (page) corresponding to the bit is written in the dump file 10. Then, the process proceeds to S216, the next bit of the dump target area information file 15 is referred to, and the process returns to S213.
If the bit is not ON in S214, the area to which the bit corresponds is not the memory dump target area, so the process proceeds to S216, the next bit of the dump target area information file 15 is referred to, and the process returns to S213. In this way, all bits of the dump target area information file 15 are referred to in S213 to S216, and the area corresponding to the ON bit is written into the dump file 10.

Next, the operation of the dump file analyzing means 14 in the second embodiment will be described with reference to FIG.
First, in S221, the address and size of the area to be displayed are instructed by the user. In step S222, the area to be displayed is converted into a page unit (4096 bytes), and the target area is calculated. For example, when the user instructs to display 0x00001 bytes from 0x000001121, the target area is 0x00001000 to 0x00002FFF.

  In step S223, the contents of the dump target area information file 15 'at the head of the dump file 10 are acquired. In S224, it is checked whether all the bits in the dump target area information file 15 'corresponding to the target area are ON. For example, if 0x00001000 to 0x00002FFF is the target area, it is checked whether bit 1 to bit 2 of the dump target area information file 15 'are ON. If the bit in the dump target area information file 15 ′ corresponding to the target area in S224 is not ON, the area instructed by the user does not exist in the dump file 10, so an error is output and processing is performed in S225. finish.

  If all the bits in the dump target area information file 15 'corresponding to the target area are turned ON in S224, the process proceeds to S226. In S226, the file position is adjusted to the final address + 1 of the dump target area information file 15 ', that is, the head of the area where the memory contents are stored. Next, in S227, the first bit of the dump target area information file 15 'is referred to. Then, in S228, it is determined whether or not the bit referred to exceeds the last bit.

If the bit being referred to does not exceed the last bit in S228, it is determined in S229 whether or not the bit being referred to is within the area calculated in S222. When it is determined in S229 that the bit referred to is not within the target area, it is checked in S230 whether the bit referred to is ON. If it is ON, an area corresponding to the bit exists in the dump file 10, and the file position is updated to the current file position + area size (= page size = 4096 bytes) in S231. As a result, the file position can skip an area corresponding to the bit currently referenced in the dump file 10. Next, in S232, the next bit of the dump target area information file 15 ′ is referred to, and the process returns to S228.
If the referenced bit is not ON in S230, the area corresponding to the bit does not exist in the dump file 10, so the process advances to S232 without updating the file position and the next of the dump target area information file 15 ′. Is referred to, and the process returns to S228.

If it is determined in S229 that the referenced bit is within the area calculated in S222, the area corresponding to the bit in the dump file 10 is read from the file position in S233. In S231, the file position is updated to the current file position + area size (= page size = 4096 bytes). In S232, the next bit of the dump target area information file 15 ′ is referred to and the process returns to S288. In this manner, all bits of the dump target area information file 15 ′ are referred to in S228 to S233, and the contents of the area calculated in S222 are read from the dump file.
If the referenced bit exceeds the last bit of the dump target area information file 15 ′ in S228, the reading of the area calculated in S222 is completed, and the process proceeds to S234, and the content of the acquired area is designated in S221. The contents of the displayed area to be displayed are extracted and displayed to the user.

  In the memory dump device according to the second embodiment, the memory is divided into a certain size (page), the dump target area information is configured by a collection of bits corresponding to each page, and the memory dump target area specified by the user The bit corresponding to the page including the memory dump target area is turned ON, and the bit corresponding to the page including the deregistration area is turned OFF for the memory dump target area to be deregistered instructed by the user. Since a page whose bit is ON in the memory dump target area information is written to the dump file, a memory dump device in the information processing apparatus that facilitates the registration and release processing of the dump target area can be obtained. .

Embodiment 3 FIG.
An information processing apparatus according to another embodiment of the present invention will be described. The configuration of the information processing apparatus is the same as that of the first embodiment and is shown in FIG. In addition, the operation of the area setting unit 11 in the present embodiment is the same as that in the second embodiment, and is omitted.
FIG. 11 shows an operation when the dump target area information file 15 of the memory dump unit 13 in this embodiment is written in the dump file 10. In this embodiment, the structure of the dump target area information file 15 in the OS 1 remains the same. However, when writing to the dump file 10, the contents of the memory dump target area information file 15 are set to the first page number and the number of pages as one set. It is converted into the information thus written and written as a dump target area information file 15 ′ of the dump file 10.

Next, the operation of the memory dump unit 13 in the third embodiment will be described with reference to FIG.
First, in S301, two variables (first page, number of pages) are set to 0 as preparation for converting the contents of the dump target area information file 15. In step S302, the first bit of the dump target area information is referenced. Then, it is determined whether or not the bit referred to in S303 exceeds the last bit of the dump target area information file 15. If the bit referenced in S303 does not exceed the last bit, the process proceeds to S304, in which the referenced bit is ON, that is, whether or not the area corresponding to the bit is a memory dump target area. Judging. If the bit referred to in S304 is ON, it is determined in S305 whether the number of pages as a variable is zero. If the number of pages as a variable is 0, it means that the bit immediately before the bit being referred to is OFF, that is, the bit currently being referred to is the first page of the memory dump target area. Then, the first page which is a variable is set to a page corresponding to the bit currently referred to, and the number of pages which is a variable is set to 1. Then, the process proceeds to S307, the next bit of the dump target area information file 15 is referred to, and the process returns to S303.

If the number of pages as a variable is not 0 in S305, it means that the currently referenced bit is in the memory dump target area, so in S308, the page corresponding to the currently referenced bit. 1 is added to the memory dump target area, the process proceeds to S307, the next bit of the dump target area information file 15 is referred to, and the process returns to S303.
In S304, if the bit being referred to is OFF, that is, if the area corresponding to the bit is not a memory dump target area, whether or not the number of pages as a variable is 0 in S309. to decide. If the number of pages that are variables is not 0, the bit immediately before the referenced bit is ON, that is, the area corresponding to the immediately preceding bit is the memory dump target area. The variable, the first page, and the number of pages in which the target area information is stored are written in the dump target area information file 15 ′ in the dump file 10. Then, in order to indicate that the currently referred bit is not a memory dump target area, the number of pages as a variable is set to 0 in S311. Then, the process proceeds to S307, the next bit of the dump target area information file 15 is referred to, and the process returns to S303.

If the number of pages is not 0 in S309, the bit immediately before the referenced bit is OFF, that is, the area corresponding to the immediately preceding bit is not a memory dump target area, and the currently referenced bit is also a memory dump target Since it is not an area, the process directly proceeds to S307, the next bit of the dump target area information file 15 is referred to, and the process returns to S303.
If the referenced bit exceeds the last bit of the dump target area information file 15 in S303, the process proceeds to S312 to determine whether the number of pages as a variable is zero. If the variable page is not 0, the area corresponding to the last bit of the dump target area information file 15 is the memory dump target area. Therefore, in S313, the information of the memory dump target area corresponding to the last bit is obtained. The stored variables, the first page, and the number of pages are written in the dump target area information file 15 ′ in the dump file 10. If the number of pages as a variable is 0 in S312, the area corresponding to the last bit of the dump target area information file 15 is not a memory dump target area, and the process directly proceeds to S314. Through the above operation, the information of the dump target area information file 15 that is a collection of bits is converted, and information with the first page number and the number of pages as one set of memory dump target area information is dump target area information of the dump file 10 Written in file 15 '.

When the operations of S301 to S313 are completed, the first bit of the dump target area information is referred again in S314. Next, in S315, it is determined whether or not the bit exceeds the last bit. If the referenced bit exceeds the last bit, the process is terminated.
If the bit referred to in S315 does not exceed the last bit, it is checked in S316 whether the bit referred to is ON. If the bit is ON, the area corresponding to the bit is registered as a memory dump target area, so the process proceeds to S317, and the area corresponding to the bit is written in the dump file 10. Then, the process proceeds to S318, the next bit of the dump target area information file 15 is referenced, and the process returns to 315.
If the bit is not ON in S316, the area to which the bit corresponds is not a memory dump target area, so the process proceeds to S318, the next bit of the dump target area information file 15 is referenced, and the process returns to S315. In this manner, all bits of the dump target area information file 15 are referred to in S315 to S318, and the area corresponding to the ON bit is written into the dump file 10. The above is the operation of the memory dump unit 13.

Next, the operation of the dump file analyzing means 14 in Embodiment 3 of the present invention will be described with reference to FIG.
In S321, the address and size of the displayed area are instructed by the user. Next, in S322, the area to be displayed is converted into page units, and the area to be the target area is calculated.
In step S323, the contents of the dump target area information file 15 ′ at the head of the dump file 10 are acquired. In S324, it is checked whether the area to be displayed exists in the dump target area information file 15 ′. Since the information of the dump target area information file 15 ′ stores the first page and the number of pages, the start address of the memory dump target area is the first page × page size (4096 bytes), and the size of the memory dump target area is the number of pages × The page size can be calculated. If the information of the memory dump target area including the display area does not exist in the dump target area information file 15 ′ in S324, an error is output in S325 and the process is terminated.

If the area to be displayed in S324 exists in the dump target area information file 15 ′, the process proceeds to S326. In S326, the file position is adjusted to the final address + 1 of the dump target area information file 15 ′, that is, the head of the area where the memory contents are stored. Next, in S327, the registration area information at the head of the dump target area information file 15 ′ is acquired. Then, it is checked whether the area registered in S328 includes the display target area. If it is determined in S328 that the display target area is not within the area indicated by the registration area information, the process proceeds to S329, and the file position is advanced to the current file position + number of pages of registration area information × page size (4096 bytes). As a result, the file position is advanced to the head position of the area next to the currently registered registration area in the dump file 10. Next, in S330, the next registered area information of the dump target area information file 15 ′ is acquired, and the process returns to S328 to check the registered area information.
If it is determined in S328 that the display target area is within the area of the registration area information, the dump contents corresponding to the registration area information in the dump file 10 are acquired from the file position information in S331, and the process proceeds to S332. Then, the data in the display area is displayed from the acquired dump contents, and the process is terminated.

  In the memory dump device according to the third embodiment, when the dump target area information at the time of the memory dump is written to the dump file, the first page number and the number of pages of each memory dump target area are set as one set from the dump target area information. When the dump file is analyzed, the position of the memory contents stored in the dump file is calculated from the first page and the number of pages, so the information processing device that reduces the size of the dump target area information in the dump file A memory dump device is obtained.

Embodiment 4 FIG.
An information processing apparatus according to another embodiment of the present invention will be described. The configuration of the information processing apparatus is the same as that of the first embodiment and is shown in FIG.
FIG. 14 shows the structure of the dump target area information file 15 in the present embodiment. In this embodiment, the memory 2 is divided into fixed sizes (pages), and the dump target area information file 15 is configured by a collection of counters corresponding to the divided areas. In the example of FIG. 14, the capacity of the memory 2 is 128 megabytes, the memory 2 is divided by 0x1000 bytes, that is, 4096 bytes, the index 0 of the dump target area information file 15 is assigned to the address 0x0000000 to 0x00000FFF of the memory 2, and the index 1 is stored in the memory 2 addresses 0x00001000 to 0x00001FFF,..., Index 65535 correspond to addresses 0x0FFFF000 to 0x0FFFFFFF of the memory 2. When the corresponding area is set as a memory dump target area, the counter value is a positive value, and when it is not the target area, the counter is set to 0. The numerical value of the counter indicates the number of multiple registrations in the memory dump target area. In the example of FIG. 14, double registration is performed in the area of 0x00004000 to 0x00005FFF, that is, the registration instruction is given twice as a memory dump target area for the area, and 4 times in the area of 0x00011000 to 0x00011FFF. It means that there was a registration instruction. The counter is incremented by +1 by one registration instruction and is decremented by -1 by one registration cancellation.

Next, the operation of the area setting unit 11 in the fourth embodiment will be described with reference to FIG.
First, in S401, the user instructs whether to register the address, size, and area of the target area or cancel the registration. In step S402, the target area is converted to a page boundary, that is, the start address of the target area is set to the start address of the page to which the start address of the start address of the specified area belongs, and the final address of the target area is specified. The size of the target area is calculated using the last address of the page to which the last address belongs.

In step S403, it is determined whether the instruction is registration of an area. If the instruction is area registration, the process proceeds to S404. In S404, the counter of the dump target area information file 15 corresponding to the page to be the target area is set to +1, and the process ends.
If the instruction is to cancel the registration of the area in S403, the process proceeds to S405. In S405, the counter of the dump target area information file 15 corresponding to the page to be the target area is set to -1. In S406, if the counter set in S405 is negative by -1, the counter value is returned to 0 and the process is terminated. As a result, the portion of the dump target area information file 15 where the counter is positive is set as the memory dump target area, and the part of which the counter is 0 is set as outside the memory dump target area.

Next, the operation of the memory dump unit 13 in the fourth embodiment will be described with reference to FIG.
First, in S411, the dump target area information file 15 is written into the dump file 10. In step S412, the head counter (index 0 in FIG. 15) of the dump target area information file 15 is referenced. Next, in S413, it is determined whether or not the counter has exceeded the final counter. If the counter being referred to exceeds the final counter (index 65535 in FIG. 15), the processing is terminated.

If the counter referred to in S413 does not exceed the final counter, it is determined in S414 whether the referenced counter is a positive value. If the counter has a positive value, the area corresponding to the counter is registered as a memory dump target area, so the process proceeds to S415, and the area (page) corresponding to the counter is written to the dump file 10. . Then, the process proceeds to S416, the next counter of the dump target area information is referenced, and the process returns to S413.
If the counter is not a positive value in S414, the area supported by the counter is not a memory dump target area, so the process proceeds to S416, the next counter of the dump target area information file 15 is referenced, and the process returns to S314. In this way, all the counters in the dump target area information file 15 are referred to in S413 to S416, and the area corresponding to the counter having a positive value is written into the dump file 10. The above is the operation of the memory dump unit 13.

Next, the operation of the dump file analyzing means 14 in the fourth embodiment will be described with reference to FIG.
First, in S421, an address and size of an area to be displayed are instructed by the user. In step S422, the area to be displayed is converted into a page unit (4096 bytes), and the target area is calculated. For example, when the user instructs to display 0x00001 bytes from 0x000001121, the target area is 0x00001000 to 0x00002FFF.
Next, in S423, the contents of the dump target area information file 15 ′ at the head of the dump file 10 are acquired. In S424, it is checked whether all the counters in the dump target area information file 15 ′ corresponding to the target area are positive values. For example, if 0x00001000 to 0x00002FFF is set as the target area, it is checked whether the counters of index 1 to index 2 of the dump target area information file 15 ′ are positive values. If the counter in the dump target area information file 15 ′ corresponding to the target area is not a positive value in S424, the area instructed by the user does not exist in the dump file 10, so an error is output and processed in S425. Exit.

  When the counters of the dump target area information file 15 'corresponding to the target area are all positive values in S424, the process proceeds to S426. In S426, the file position is adjusted to the final address + 1 of the dump target area information file 15 ', that is, the top of the area where the memory contents are stored. In step S427, the head counter of the dump target area information file 15 'is referenced. Then, it is determined whether or not the counter referred to in S428 exceeds the final counter.

In S428, if the referenced counter does not exceed the final counter, it is determined whether or not the referenced counter is in the target area in S429. If it is determined that the counter referred to in S429 is not within the target area, it is checked whether the counter referred to in S430 is a positive value. If the value is a positive value, an area corresponding to the counter exists in the dump file 10, and the file position is updated to the current file position + area size (= page size = 4096 bytes) in S431. As a result, the file position can skip an area corresponding to the currently referenced counter in the dump file 10. Next, in S432, the next counter of the dump target area information file 15 ′ is referred to, and the process returns to S428.
If the counter being referred to is not a positive value in S430, the area corresponding to the counter does not exist in the dump file 10, so the process advances to S432 without updating the file position, and the dump target area information file 15 The counter next to 'is referred to, and the process returns to S428.

When it is determined in S429 that the referenced counter is within the target area, in S433, the area corresponding to the counter in the dump file 10 from the file position, that is, the area to be displayed instructed in S421 is displayed. Read it out. In S431, the file position is updated to the current file position + area size (= page size = 4096 bytes), and in S432, the next counter of the dump target area information file 15 ′ is referred to and the process returns to S428. In this way, the contents of the target area are read from the dump file by referring to all the counters in the dump target area information file 15 ′ in S428 to S433.
In S428, if the referenced counter exceeds the final counter of the dump target area information file 15 ′, reading of the target area is completed, so that the process proceeds in S434, and the content of the acquired target area is instructed in S421. The contents of the area to be displayed are extracted and displayed to the user.

  In the memory dump device according to the fourth embodiment, the memory is divided into fixed sizes (pages), the dump target area information is configured by a collection of counters corresponding to each page, and the memory dump target area specified by the user is registered. On the other hand, the counter corresponding to the page including the memory dump target area is set to +1, and the counter corresponding to the page including the deregistration area is set to −1 for deregistration of the memory dump target area specified by the user, When a memory dump is performed, a page with a positive counter in the memory dump target area information is written to the dump file, so even if the memory dump target areas specified by the user overlap, one registration cancellation request Thus, a memory dump device in the information processing apparatus in which the other registration request area is not erased can be obtained.

Embodiment 5 FIG.
An information processing apparatus according to another embodiment of the present invention will be described. The configuration of the information processing apparatus is the same as that of the first embodiment and is shown in FIG. The present embodiment is the same as the fourth embodiment except for the operation of the region setting means.
The operation of the area setting unit 11 in the present embodiment will be described with reference to FIG. First, in S501, the user instructs whether to register the address and size of the target area and the area, to cancel the registration, or to delete the registration all at once. In step S502, the target area is converted to a page boundary, that is, the start address of the target area is set to the start address of the page to which the start address of the specified area belongs, and the final address of the target area is set to the final address of the specified area. The size of the target area is calculated using the last address of the page to which the page belongs.
In step S503, it is determined whether the instruction is registration of an area. When the instruction is area registration, the process proceeds to S504. In S504, the counter of the dump target area information file 15 corresponding to the page that is the target area is incremented by 1, and the process ends.

If the instruction is not registration of the area in S503, it is determined whether or not the instruction is to cancel the registration of the area in S505. If the instruction is to cancel the registration of the area in S505, the counter of the dump target area information file 15 corresponding to the page to be the target area is set to -1 in S506. In S507, if the counter set in S506 has become negative by -1, the counter value is returned to 0 and the process is terminated.
If the instruction is not deregistration of the area in S505, the process proceeds to S508. In step S508, the counter of the dump target area information file 15 corresponding to the page that is the target area is set to 0, and the process ends. As a result, the target area is set outside the memory dump target area by one instruction even if the areas are registered in multiple. The above is the operation of the area setting unit 11.

  In the memory dump device according to the fifth embodiment, in response to the registered batch deletion instruction from the user, the dump of the dump target area information corresponding to the page including the target memory dump target area is set to 0, whereby the memory dump A memory dump device in an information processing apparatus that can collectively erase areas that are registered in the target area at once is obtained.

Embodiment 6 FIG.
An information processing apparatus according to another embodiment of the present invention will be described. FIG. 19 is a configuration diagram of the information processing apparatus according to Embodiment 6 of the present invention. In this embodiment, the information processing apparatus converts a virtual address into a physical address, accesses the physical space using the converted physical address, and functionally accesses the virtual space using the virtual address. It has a function. In FIG. 19, 30 is a logical / physical correspondence table having a virtual address area for storing virtual addresses and a physical address area for storing physical addresses in order to realize this virtual storage function. The other configuration is the same as or equivalent to the configuration in FIG.

  FIG. 20 shows a part of the configuration of the logical / physical correspondence table 30 in the present embodiment. The logical / physical correspondence table 30 divides the virtual space and the physical space into a certain size (page, 1 page = 0x1000 bytes = 4096 bytes in the example of FIG. 20), and the page number on the virtual space for each virtual space. And a table in which corresponding page numbers on the physical space are associated with each other. In the example of FIG. 20, the area A21 ″ (virtual addresses 0x00001000 to 0x00001FFF) on the virtual space A corresponds to the logical page number 0x00001 for the virtual space A in the logical / physical correspondence table 30 and corresponds. The physical page number corresponds to 0x00001, that is, addresses 0x00001000 to 0x00001FFF in the physical space. The area C23 ″ (virtual addresses 0x0000000 to 0x00009FFF) on the virtual space B corresponds to the logical page numbers 0x00007 to 0x00009 for the virtual space B in the logical / physical correspondence table 30, and the corresponding physical page The number corresponds to 0x00010 to 0x00012, that is, addresses 0x0001000 to 0x00012FFF in the physical space. Since the logical / physical correspondence table 30 is provided for each virtual space in this way, each program in the information processing apparatus is assigned to each -1 virtual space, and the logical / physical information corresponding to the program is switched at the time of program switching. By setting the physical correspondence table 30 in the virtual storage function of the information processing apparatus, programs operating on the OS 1 can be executed independently and in parallel. Note that −1 is set in the physical page number area corresponding to the logical page number 0x00003 for the virtual space A in the logical / physical correspondence table 30 of FIG. 20, but this is the physical address corresponding to this logical page. It means that there is no space.

In this embodiment, a case will be described in which the virtual storage function provided in the information processing apparatus includes a paging method that defines a logical page obtained by dividing a virtual space and a physical page obtained by dividing a physical space. However, the present invention is not limited to this method, and other methods such as a method using segments may be used.
FIG. 21 shows the structure of the dump file 10 in the present embodiment. In the dump file 10, in addition to the dump target area information file 15 ′ and the areas A21 ′, B22 ′, and C23 ′ as the memory dump target areas, a logic for storing the logical / physical correspondence table 30 in the memory 2 is stored. / It consists of the area of the physical correspondence table 30 ′.

Next, the operation of the area setting unit 11 in the sixth embodiment will be described with reference to FIG.
First, in S601, the address and size in the virtual space of the area to be dumped are instructed by the user. In step S602, an address on the virtual space designated by the user is converted into an address on the physical space from the logical / physical correspondence table on the memory 2. In S603, it is searched whether the area in the physical space converted in S602 is already registered from the head information of the dump target area information file 15 in the OS1. In S604, the area in the physical space converted in S602 does not overlap with the area registered in the dump target area information file 15, that is, the specified area is registered in the dump target area information file 15. If it is determined that there is not, the address and size in the physical space of the area specified in S605 are set to the free area (address is 0, size is -1) in the dump target area information file 15, and the process is terminated. To do.

  If the area in the physical space converted in S602 overlaps with the area registered in the dump target area information file 15 in S604, the registered area that overlaps the specified area is dumped in the dump target area information file 15 in S606. Delete from. In step S607, the address and size of the area including the deleted area and the area specified in step S602 are set in the dump target area information file 15, and the process ends. The above is the operation of the area setting unit 11.

Next, the operation of the memory dump unit 13 in the sixth embodiment will be described with reference to FIG.
First, in S611, the logical / physical correspondence table 30 is written into the dump file 10. In step S612, the dump target area information file 15 is written into the dump file 10. In step S613, the registration area information at the head of the dump target area information file 15 is acquired. In step S613, it is checked whether the size information portion of the registration area information is -1. When the size information portion is -1, it means that the information area is free. However, since the area dump target area information file 15 registers areas in order from the top, it means that the area is a free area. This means that there is no information registered in the subsequent areas. Therefore, when the size information portion of the registration area information is −1 in S614, the process is terminated.

  If the size of the registration area information is not −1 in S614, the corresponding area in the memory 2 is written in the dump file 10 from the address and size information of the registration area information in S615. In step S616, the next registration information of the dump target area information file 15 is acquired, and the process returns to step S614. By repeating S614 to S616 in this way, the memory dump target area in the memory 2 is written to the dump file 10.

Next, the operation of the dump file analyzing means in the sixth embodiment will be described with reference to FIG.
First, in S621, the address and size in the virtual space of the area desired to be displayed are instructed by the user. In step S622, the logical / physical correspondence table 30 ′ at the head of the dump file 10 is acquired. In S623, the logical / physical correspondence table 30 ′ acquired in S622 is converted into an address in the physical space by using the logical / physical correspondence table 30 ′ acquired in S622, and an area in the physical space is calculated.

  In step S624, the dump target area information file 15 'next to the logical / physical correspondence table 30' in the dump file 10 is acquired. In step S625, the next read position from the dump file 10 is set to the final address + 1 of the dump target area information file 15 ', that is, the beginning of the area where the memory contents are stored. Next, in S626, the registration information at the head of the dump target area information file 15 'acquired in S624 is referred to. Then, it is checked whether the size information portion of the registration information acquired in S627 is -1. If the size information part is -1, it means that the information area is empty, but the dump target area information file 15 'registers the areas in order from the beginning, so that it is an empty area. This means that there is no information registered in the subsequent areas. Therefore, if the size information portion of the registration area information referred to in S627 is -1, it is determined that the area to be displayed does not exist in the dump file 10, and the process proceeds to S628, where an error is output and the process is performed. finish.

If the size of the registration area information is not −1 in S627, it is determined in S629 whether the area in the physical space converted in S623 from the address and size information of the registration area information is within the area indicated by the main registration area information. . If it is determined that the area converted in S629 is not within the area indicated by the registration area information, the process advances to S630 to advance the file position to the size described in the current file position + registration area information. As a result, the file position is advanced to the head position of the area next to the currently registered registration area in the dump file 10. Next, in S631, the next registration area information in the dump target area information file 15 ′ is referred to, and the process returns to S627 to check the registration area information.
If it is determined in S629 that the converted area is within the registration area information area, the memory contents corresponding to the registration area information in the dump file 10 are acquired from the file position information in S632, and the process proceeds to S633. Then, the data in the area designated by the user is displayed from the acquired dump contents, and the process is terminated.

  In the memory dump device according to the sixth embodiment, when a memory dump target area is set by the user, a virtual address instructed by the user is converted into a physical address by using a logical / physical correspondence table that realizes a virtual storage function. In the memory dump, the memory dump target area based on the dump target area information and the dump target area is written to the dump file, and the logical / physical correspondence table is also written to the dump file. By displaying the memory contents in the dump file based on the logical / physical correspondence table and dump target area information in the dump file, a memory dump device in an information processing device that enables failure analysis at a virtual address is obtained. It is done.

The memory dump device according to the embodiment of the present invention is a method in which a user pre-specifies a memory target when a failure occurs in an information processing device.
An area setting unit that divides the memory to be dumped into a certain size and sets on / off bits indicating whether dump output is necessary or unnecessary for each divided area, and a bit-corresponding memory set when a failure occurs. A memory dump unit that outputs information as dump target area information to an external dump file, and a dump file analysis unit that sequentially outputs the output memory information for a set divided area are provided.

  Still further, the memory dump device according to the embodiment of the present invention is characterized in that the divided area is designated by a head address or a counter value.

  Still further, the memory dump device according to the embodiment of the present invention includes a correspondence table of virtual addresses and real addresses, and the area setting means refers to the correspondence table when the virtual address is designated and converts the virtual address to the real address. The information is converted and set, the memory dump means refers to the correspondence table and dumps the real address information, and the dump file analysis means outputs the real address information.

Furthermore, the memory dump device according to the embodiment of the present invention is a memory dump device that dumps information stored in a memory of an information processing device.
The dump target area information file that stores information indicating the dump target area of the memory as dump target area information, and the dump target area information stored in the dump target area information file when a failure occurs in the information processing device, Dump target area information and memory dump means for outputting area information stored in the dump target area of the memory indicated by the dump target area information as a dump file, and dump target area information of the dump file output by the memory dump means A dump file analyzing means for analyzing the area information of the dump file with reference to the information processing apparatus, wherein the information processing apparatus stores a virtual space address area for storing the virtual space address and a physical space address area for storing the physical space address in the memory. And a logical / physical correspondence table with The file stores the dump target area information obtained by converting the dump target area information indicated by the virtual space address into the physical space address using the logical / physical correspondence table, and the memory dump means further includes a logical dump. The physical / physical correspondence table is output to the dump file, and the dump file analyzing means inputs the user reference desired area information indicating the user's desired reference area indicated by the virtual space address, and the logical / physical data output to the dump file. A virtual space address of a user reference desired area is converted into a physical space address using a correspondence table, and area information indicated by the converted physical space address is output.

It is a block diagram of the information processing apparatus in Embodiment 1 of this invention. FIG. 6 is a diagram of a dump target area information file in the first embodiment. 6 is a diagram of a dump file according to Embodiment 1. FIG. FIG. 6 is an operation flowchart of region setting means in the first embodiment. FIG. 5 is an operation flowchart of the memory dump unit in the first embodiment. FIG. 6 is an operation flowchart of the dump file analysis means in the first embodiment. It is a figure of the dump target area information file in Embodiment 2 of this invention. FIG. 10 is an operation flowchart of region setting means in the second embodiment. FIG. 10 is an operation flowchart of the memory dump unit in the second embodiment. FIG. 11 is an operation flowchart of dump file analysis means in the second embodiment. It is an operation | movement flowchart of the memory dump means in Embodiment 3 of this invention. FIG. 10 is an operation flowchart of the memory dump unit in the third embodiment. FIG. 11 is an operation flowchart of dump file analysis means in the third embodiment. It is a figure of the dump target area information file in Embodiment 4 of this invention. FIG. 10 is an operation flowchart of region setting means in the fourth embodiment. FIG. 10 is an operation flowchart of a memory dump unit in the fourth embodiment. FIG. 10 is an operation flowchart of dump file analysis means in the fourth embodiment. It is an operation | movement flowchart of the area | region setting means in Embodiment 5 of this invention. It is a block diagram of the information processing apparatus in Embodiment 6 of this invention. FIG. 20 shows a virtual / real address conversion table in the sixth embodiment. FIG. 20 is a diagram of a dump file in the sixth embodiment. FIG. 20 is an operation flowchart of region setting means in the sixth embodiment. FIG. 20 is an operation flowchart of the memory dump unit in the sixth embodiment. FIG. 20 is an operation flowchart of dump file analysis means in the sixth embodiment. It is a figure which shows the memory dump system in the conventional information processing apparatus. It is a figure which shows the structure and operation | movement of another conventional memory dump system.

Explanation of symbols

  11 Area setting means, 13 Memory dump means, 14 Dump file analysis means, 30 Logical / physical (virtual / real address) correspondence table.

Claims (2)

In a memory dump device that dumps information stored in a memory of an information processing device,
A dump target area information file that stores, as dump target area information, a set of page correspondence information indicating whether each page area obtained by dividing the memory into a certain size is a dump target;
When a failure occurs in the information processing device, the dump target area information stored in the dump target area information file is read, and a set of page correspondence information is expressed as a combination of the first page number and the number of pages in the dump target area Memory dump means for converting to dump target area information, and outputting the converted dump target area information and the area information stored in the dump target area of the memory indicated by the dump target area information as a dump file;
Memory comprising dump file analysis means for analyzing dump file area information with reference to a combination of the first page number and the number of pages of dump target area information of the dump file output by the memory dump means Dump device.   2. The memory dump device according to claim 1, wherein the set of page correspondence information is a set of bits corresponding to a page area, and indicates whether or not the corresponding page area is a dump target by turning on / off the bits.

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