Core file debug mdb

By default, mdb refuses to attach to a user process that is already under the control of another debugging tool, such as truss 1. With the -F option, mdb attaches to these processes anyway.

This can produce unexpected interactions between mdb and the other tools attempting to control the process. Force raw file debugging mode. By default, mdb attempts to infer whether the object and core file operands refer to a user executable and core dump or to a pair of operating system crash dump files. If the file type cannot be inferred, the debugger will default to examining the files as plain binary data.

The -f option forces mdb to interpret the arguments as a set of raw files to examine. Sets default path for locating macro files. The path is a sequence of directory names delimited by colon : characters. The -I include path and -L library path see below can also contain any of the following tokens:. Expands to the current instruction set architecture ISA name: sparc , sparcv9 , i , or amd Expands to the old value of the path being modified.

This is useful for appending or prepending directories to an existing path. Expands to the current platform string either uname -i or the platform string stored in the process core file or crash dump. Expands to the path name of the root directory.

An alternate root directory can be specified using the -R option. If no -R option is present, the root directory is derived dynamically from the path to the mdb executable itself. Expands to the name of the current target. This is either the literal string ' proc ' a user process or user process core file , or ' kvm ' a kernel crash dump or the live operating system. Forces kernel debugging mode.

By default, mdb attempts to infer whether the object and core file operands refer to a user executable and core dump, or to a pair of operating system crash dump files. The -k option forces mdb to assume these files are operating system crash dump files. Load kmdb , stop the live running operating system kernel, and proceed to the kmdb debugger prompt. This option should only be used on the system console, as the subsequent kmdb prompt will appear on the system console. Create a free Team What is Teams?

Collectives on Stack Overflow. Learn more. Core dump file analysis [duplicate] Ask Question. Asked 10 years, 10 months ago. Active 2 years, 1 month ago. Viewed k times. Improve this question. Peter Mortensen Dew Dew 2, 5 5 gold badges 15 15 silver badges 7 7 bronze badges. Can you describe what your problem is. What command is giving trouble? Maybe reference the chapter from the doc: sourceware. Add a comment. Active Oldest Votes.

This GDB was configured as "iredhat-linux-gnu". For bug reporting instructions, please see Like this: Like Loading How to setup an alert to know about server crash situation? Leave a Reply Cancel reply Your email address will not be published.

Comment Name Email Notify me via e-mail if anyone answers my comment. If the results of the pstack utility are almost empty, all of the lines in the output look as follows:. In this case, make sure to run pstack on the machine where the core file was generated. You can also use the mdb command instead of the pstack command to know the stack of the core. Run the mdb command as follows:. The output of the mdb and the pstack commands provide helpful information about the process stack at the time of the crash.