JP3159357B2 - Multicomputer debugger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for connecting a plurality of computers and an input / output terminal device to a local area network (LA).
The present invention relates to a multi-computer debugger method in a multi-computer system connected through N) and a multi-computer system to which the method is applied.

[0002]

2. Description of the Related Art Conventionally, a standard method of a debugger in a computer system of this kind is to control a single computer debugger operating on a single computer from an input / output terminal device connected to the computer, and to control the computer on the computer. It controls and displays the internal state of the running application program.

As a technique related to a debugger method in a multi-computer system, Japanese Patent Application Laid-Open No.
An information processing apparatus having a program break function disclosed in Japanese Patent Application Laid-Open No. 82937, which is obtained every time a test and set instruction is executed during execution of an instruction for debugging a program disclosed in Japanese Patent Application Laid-Open No. 2-82344. A method of debugging a program in a multiprocessor system in which trace information is written to a trace area of a memory, or a method of fetching or storing only an arbitrary processor or all processors by a multiprocessor disclosed in Japanese Patent Application Laid-Open No. 2-153442. Address stop or program event record (PE
R) A method of debugging a multiprocessor that performs a function may be used.

[0004]

According to the above-described debugger method in a computer system, when an application program operating on a plurality of computers operates in cooperation with one another, a single input / output terminal device can be used on a plurality of computers. Dynamic state of the running application program (for example, process internal state, interprocess communication,
(Multi-process synchronization, shared resource status, etc.) cannot be controlled and displayed with multiple functions, and the debugger operation itself causes a timing deviation with respect to the operation of the application program, which tends to cause nondeterminism of the operation. There is.

In particular, there is a problem with a multi-computer system that it is not possible to sufficiently guarantee the synchronization of the processing of the application program and prevent the processing from being disturbed by the debugger operation.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and its technical problem is to guarantee the synchronization of the processing of a plurality of application programs and to prevent the processing from being disturbed by the operation of a debugger. It is an object of the present invention to provide a multi-computer debugger method and a multi-computer system to which the multi-computer debugger method can be applied.

[0007]

A first multi-computer debugger of the present invention is a multi-computer debugger that collectively debugs a plurality of computers in a multi-computer system in which the plurality of computers are connected via a communication line. Recording information of an event occurring in any of the plurality of computers in association with an order of occurrence of the event in the computer;
Information of an event that has occurred between the two computers is recorded as event information in one of the two computers in association with the order in which the events occurred in the computer,
A process monitoring unit that records the event information in the other of the two computers in association with the order of occurrence of the events in the computer and information indicating that the event has occurred following the event in the one computer; Based on the information of the event recorded by the process monitoring unit, the order of occurrence of the event, and the information indicating that the event has occurred following a predetermined event in another computer, any one or any two of the plurality of computers And a debugger control unit for reproducing an event generated between them.

In a second multi-computer debugger of the present invention, in the first multi-computer debugger, the process monitoring unit corresponds to a dimension corresponding to each of the plurality of computers as an order of occurrence of the event. The relative time of the event is set by setting the order of occurrence of the event in the computer, and the fact that the event has occurred following the predetermined event in the other computer is indicated by the dimension corresponding to the other computer in the relative time of the event. Are set to be continuous by the order of occurrence of the events set in.

In a third multi-computer debugger of the present invention, in the first multi-computer debugger, the debugger control unit displays a configuration of an event that has occurred in any one of the plurality of computers or between any two of the plurality of computers. Is performed.

[0010]

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, the outline of the multi-computer debugger method of the present invention will be briefly described. This multi-computer debugger method establishes synchronization of processing of a plurality of application programs operating in cooperation with a plurality of computers, and stores and records event information generated between a plurality of computers as only multi-computer debugger recording information. By doing so, the disturbance of the operation processing of the debugger is suppressed, and the internal state of the process, the inter-process communication, the inter-process synchronization, and the shared resource state are controlled and displayed from a predetermined input / output terminal device side.

FIG. 1 is a block diagram showing a basic configuration of a multi-computer system according to an embodiment of the present invention to which the multi-computer debugger method is applied.

This multi-computer system comprises three computers 13, 14, 15 and one input / output terminal device 11 connected to a multi-computer debugger system 22 via a local area network 12.

Here, each of the computers 13, 14, 15
Is provided with a multi-computer debugger whose session has been established by the multi-computer debugger system 22, a single computer debugger (A) and an application program A are provided on the computer 13, and a single computer debugger (B) is provided on the computer 14. ) And application program B
And a computer 15 is provided with a single computer debugger (C) and an application program C. Incidentally, each of the single computer debuggers (A), (B), and (C) displays the internal state of the process of the application program A, B, and C to be debugged that operates on each of the computers 13, 14, and 15, respectively. And is controlled by the multi-computer debugger of each of the computers 13, 14, and 15. The input / output terminal device 11 controls and displays a multi-computer debugger, and the multi-computer debugger system 22
Then, the application programs A, B, and C operating in cooperation among the computers 13, 14, and 15 are debugged.

Multicomputer debugger system 22
Indicates the internal state of the process of each of the application programs A, B, and C to be debugged that are operated by the computers 13, 14, and 15, respectively.
A session between the multi-computer debuggers controlling the single computer debuggers (A), (B), and (C) for controlling and displaying by the computers 13 and 1
The communication control unit 16 established for the application programs 4 and 15 and the inter-process communication, inter-process synchronization, and shared resources of all the application programs when the corresponding application program is executed in order to suppress the disturbance of the process due to the operation of the debugger. Process monitoring unit 17 for generating minimum log information corresponding to event relative time information obtained by monitoring access to memory tables, disk files, etc. that do not occur, and the occurrence times of these events, and the generated log information And a multi-computer debugger recording information storage unit 21 for storing event relative time information as multi-computer debugger recording information, and a reproduction control unit for reproducing the operation of each application program to be debugged based on the multi-computer debugger recording information. 19 and The event control unit 18 for controlling the timing of events generated during reproduction, the control from the output terminal 11 at the time of reproduction, and a multicomputer debugger controller 20 for performing control for causing the display.

FIG. 3 is a flowchart showing the processing operation (debugging procedure) of the multi-computer debugger by the multi-computer debugger system 22.

Here, first, information is input from the input / output terminal device 11 to start the multi-computer debugger (step S1), and then each of the computers 13, 14, 1
After establishing a session of the multi-computer debuggers respectively arranged in step S5 (step S2), the application program performs processing in response to a processing request from the input / output terminal device 11 (step S3). Subsequently, the process monitoring unit 17 monitors the process (step S4), and then ends the processing of the application program (step S5). Log this time, the process monitoring unit 17 inter-process communication that occurs between each computer 13, 14, 15, interprocess synchronization, a multi-computer debugger recording information S _X corresponding version status of the shared resource in the event the relative time information recorded in the multi-computer debugger recording information storage section 21 as information, but here multicomputer debugger writes the recording information S _X in is terminated by the end of processing the application program (step S5).

Thereafter, the multi-computer debugger controls the multi-computer debugger in accordance with the reproduction control S _X 2 reproduced by writing the multi-computer debugger recording information S _X by the reproduction control unit 19 and the event control S _X 1 by the event control unit 18. The multi-computer debugger control (step S6) is performed by the unit 20, and the input / output terminal device 11 controls and displays the internal state of the process, the inter-process communication, the inter-process synchronization, and the shared resource state.

Further, it is determined whether or not the debugger has been terminated (step S7). If the debugger has not been terminated, the process returns before inputting the event control S _X1 and the reproduction control S _X2. After releasing the session of the computer debugger (step S8), the multi-computer debugger is terminated (step S9).

FIG. 4 is a flowchart showing the processing operation of the process monitoring unit 17. When an event occurs in the previous processing operation, the process monitoring unit 17 detects event occurrence (step S1) and records log information of the event that has occurred as event control record S _X1 in multi-computer debugger record information S _X. When the communication with another computer is started by performing the inter-process communication monitoring (step S2), the log information is recorded as the inter-process communication record S _X2 in the multi-computer debugger record information S _X ,
When inter-process synchronization monitoring (step S3) is performed to establish synchronization with an application program of another computer, the result is recorded as process synchronization record S _X 3 in multi-computer debugger recording information S _X , and shared resource access monitoring ( step S4) when performing access to the shared resources performed, and records the result in the multi-computer debugger recording information S _X as a shared resource access record S _X 4.

FIG. 5 shows the transition state of the inter-process communication and the synchronization process for each of the application programs A, B, and C to be debugged by the multi-computer debugger system 22. Here, the application programs A, B, and C operating on each of the computers 13, 14, and 15 are regarded as the operation status collected by the process monitoring unit 17, and are used as the operation status of each of the computers 13, 14, and 15.
Indicates the event that occurred in.

FIG. 6 shows a state in which the event control unit 18 assigns an event relative time generated based on the time at which the event occurred in the event control record S _X 1, with respect to the operation of the application program described above. Here, when an internal state change, inter-process communication, inter-process synchronization, or access to a shared resource is performed, its own relative time is added, but the receiving side compares its own transmitted relative time and sets a larger value. Apply as a new relative time. The reproduction control unit 19 includes the event control unit 18
Controls the reproduction of the process execution based on the event control record S _X1 generated by the computer, and operates the process while synchronizing the relative times of the computers 13, 14, and 15.

FIG. 7 is a flowchart showing the processing operation of the multi-computer debugger control unit 20. Here, the processing operation when the multi-computer debugger control unit 20 receives the services of the event control unit 18 and the reproduction control unit 19, reproduces the operation of the application program according to the event relative time, and executes the multi-computer debugger is shown.

In this processing operation, the multi-computer debugger is controlled by the event control unit 18 based on the event relative time in order to suppress the disturbance of the processing due to the operation of the debugger. (Step S1), and then the multi-computer debugger processing selection (Step S2) is performed by the input / output terminal device 11. As a result, the multi-computer debugging support S3a (device configuration display,
Process configuration display, inter-process communication path related diagram display, debug target computer selection, debug target process selection, event relative time advance / retreat), breakpoint for temporarily stopping program processing at an arbitrary address of a process or an execution instruction part One of a setting S3b, an internal state output S3c for dumping and displaying an internal format of an arbitrary address (which may be a label or a file), and a re-execution S3d for restarting a process stopped at a breakpoint is selected.

Subsequently, it is determined whether or not debugging for the current event relative time has been completed (step S4). If debugging has not been completed, the process returns before multicomputer debugger processing selection (step S2). If completed, the event relative time is added (step S5) and debugging is continued. Further, it is determined whether or not the debugging is completed (step S6),
If the debugging is not completed, the process returns before the selection of the multi-computer debugger process (step S2). If the debugging is completed, the process is terminated.

In the above-described embodiment, a multi-computer system including three computers and one input / output terminal device has been described. However, the number may be arbitrarily set. Is not limited to the embodiment.

[0028]

As described above, according to the present invention, the synchronization of the processing of a plurality of application programs can be guaranteed, and the event information generated between a plurality of computers can be used as the only multi-computer debugger recording information. There is provided a multi-computer debugger method capable of preventing disturbance of processing due to operation of a debugger by accumulating and recording, and a multi-computer system to which the multi-computer debugger method is applied. As a result, debugging using the recorded event information as it is becomes possible, and debugging in a multi-computer system can be performed very efficiently. In particular, the multi-computer debugger method of the present invention and the multi-computer system to which the multi-computer debugger is applied have a configuration in which the internal state of the process, the inter-process communication, the inter-process synchronization, and the shared resource state are controlled and displayed from a predetermined input / output terminal. For this reason, it is possible to realize multifunctions that have not existed in the past with stable operations.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a basic configuration of a multicomputer system according to an embodiment to which a multicomputer debugger method of the present invention is applied.

FIG. 2 is a block diagram for explaining a multi-computer debugger system which is a main part of the multi-computer system shown in FIG. 1 and its peripheral configuration;

FIG. 3 is a flowchart showing a processing operation (debug procedure) of the multi-computer debugger by the multi-computer debugger system shown in FIG. 2;

4 is a flowchart showing a processing operation of a process monitoring unit in the multi-computer debugger system shown in FIG.

5 illustrates a transition state of inter-process communication and synchronous processing for a plurality of application programs to be debugged by the multi-computer debugger system illustrated in FIG. 2;

FIG. 6 illustrates a state in which an event control unit assigns an event relative time to the operation of the application program described in FIG. 5;

7 is a flowchart showing a processing operation of a multi-computer debugger control unit in the multi-computer debugger system shown in FIG.

[Explanation of symbols]

 Reference Signs List 11 input / output terminal device 12 local area network 13, 14, 15 computer 16 communication control unit 17 process monitoring unit 18 event control unit 19 reproduction control unit 20 multi-computer debugger control unit 21 multi-computer debugger record information storage unit 22 multi-computer debugger system

 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-353939 (JP, A) JP-A-4-316152 (JP, A) JP-A-4-317235 (JP, A) JP-A-5-305 224984 (JP, A) JP-A-6-19865 (JP, A)

Claims (3)

(57) [Claims] 1. A multi-computer debugger that collectively debugs a plurality of computers in a multi-computer system in which the plurality of computers are connected via a communication line, wherein an event generated in any of the plurality of computers is provided. Is recorded in association with the order of occurrence of events in the computer, and information on an event that has occurred between any two of the plurality of computers is recorded as event information in one of the two computers. Is recorded in association with the order of occurrence of the events in the two computers, and the event information in the other of the two computers indicates the order of occurrence of the events in the computer and that the event has occurred following the event in the one computer. A process monitoring unit that records the information in association with the information, based on the event information recorded by the process monitoring unit, the event occurrence order, and information indicating that the event has occurred following a predetermined event in another computer, A multi-computer debugger, comprising: a debugger control unit that reproduces an event that has occurred in any one of the plurality of computers or between any two of the plurality of computers. 2. The process monitoring unit records, as the event occurrence order, an event relative time obtained by setting an event occurrence order in a computer corresponding to a dimension corresponding to each of the plurality of computers. Indicating that the event has occurred following a predetermined event in another computer by continuing the order of occurrence of events set in a dimension corresponding to the other computer at the event relative time. The multi-computer debugger according to claim 1, wherein 3. The multi-computer debugger according to claim 1, wherein the debugger control unit displays a configuration of an event that has occurred on any one of the plurality of computers or between any two of the plurality of computers.