Which of the following information is available in the core dump and may be used to identify the root cause of the crash?

When a User Mode process suddenly crashes, it may create a core dump file.

Which of the following information is available in the core dump and may be used to identify the root cause of the crash?

i. Program Counter

ii. Stack Pointer

iii. Memory management information

iv. Other Processor and OS flags / information
A . iii and iv only
B . i and ii only
C . i, ii, iii and iv
D . Only lii

View Answer

Answer: C

Explanation:

A core dump file is essentially a snapshot of the process’s memory at the time of the crash. This snapshot includes crucial information that can help diagnose the cause of the crash.

Here’s why all the options are relevant:

i. Program Counter: This register stores the address of the next instruction the CPU was supposed to execute. It pinpoints exactly where in the code the crash occurred.

ii. Stack Pointer: This register points to the top of the call stack, which shows the sequence of function calls that led to the crash. This helps trace the program’s execution flow before the crash.

iii. Memory management information: This includes details about the process’s memory allocations, which can reveal issues like memory leaks or invalid memory access attempts.

iv. Other Processor and OS flags/information: This encompasses various registers and system information that provide context about the state of the processor and operating system at the time of the crash.

By analyzing this information within the core dump, you can often identify the root cause of the crash, such as a segmentation fault, null pointer dereference, or stack overflow.

Check Point Troubleshooting

Reference: While core dumps are a general concept in operating systems, Check Point’s documentation touches upon them in the context of troubleshooting specific processes like fwd (firewall) or cpd (Check Point daemon). The fw ctl zdebug command, for example, can be used to trigger a core dump of the fwd process for debugging purposes.