What is core file in Solaris?

What is core file in Solaris?

A core file is the image of a process’ memory but does not contain some of the information a debugger needs to work properly. Some of those information are for example the ‘symbol table’ and the ‘instructions’. Both executable and loaded objects (dynamic libraries) have each their own set of instructions and symbols.

How do I debug a core file in Solaris?

To Eliminate the Library Problems and Debug a “mismatched” Core File

1. Set the dbx environment variable core_lo_pathmap to on.
2. Use the pathmap command to tell dbx where the correct libraries for the core file are located.
3. Use the debug command to load the program and the core file.

How do I read a core file in Unix?

Procedure

1. Enter the following command from a UNIX command prompt: dbx program_name core_filename.
2. Examine the call stack in the core file. Information about how to do this can be obtained by issuing man dbx from a UNIX command prompt.
3. To end the dbx command, type quit at the dbx prompt.

How to see CPU in Solaris?

To find the number of physical CPUs on any system use the -p option with psrinfo command. The -p option may not work with solaris 9 and below. In that case use the kstat command to find the physical CPUs. Now psrinfo or psrinfo -v would display all the logical/virtual CPUs.

How do I view a core file in Linux?

Solution

1. When attempting to read a core file make sure it is on the same Operating System that it was originally created on. Copy the core file to this location if it is not already there :
2. break [ file :] function. Set a breakpoint at function (in file).
3. run [ arglist]
4. bt.
5. print expr.
6. c.
7. next.
8. edit [ file :] function.

How do I use Pstack?

To get the pstack and gcore, here is the procedure:

1. Get the process ID of the suspect process: # ps -eaf | grep -i suspect_process.
2. Use the process ID to generate the gcore: # gcore
3. Now generate the pstack based on the generated gcore file:
4. Now create a compressed tar ball with the gcore.

How do I debug a core file in dbx?

Set the dbx environment variable core_lo_pathmap to on. Use the pathmap command to tell dbx where the correct libraries for the core file are located. Use the debug command to load the program and the core file. If you are not exporting the root partition of the core-host, you must copy the libraries by hand.

How do I debug a core file in Linux?

if that doesn’t work, or if you want to have a core dump to investigate:

1. make sure the binary is compiled with debugging symbols.
2. set ulimit and kernel. core_pattern correctly.
3. run the program.
4. open your core dump with gdb , load the symbols, and run bt.
5. try to figure out what happened!!

How do I Analyse a core file?

With a core file, we can use the debugger (GDB) to inspect the state of the process at the moment it was terminated and to identify the line of code that caused the problem. That’s a situation where a core dump file could be produced, but it’s not by default.

What is Pstack used for?

The pstack command displays a stack trace for each process. The pstack command must be run by the owner of the process or by root. You can use the pstack command to determine where a process is hung. The only option that is allowed with this command is the process ID of the process that you want to check.

https://www.youtube.com/watch?v=d8UaqODmdvc