majiayu000/claude-arsenal
xiaohongshu
xiaohongshu
286 148
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Core Dump Analysis
coredump
Core Dump Analysis skill for the ikigai project
SKILL.md
Full skill instructions
Core Dump Analysis
Description
Post-mortem debugging using core dumps for crashes that occur before gdbserver can catch them.
When to Use
- Crashes during very early startup
- Crashes before gdbserver fully initializes
- When you need to reproduce and analyze offline
- Segfaults, aborts, or other fatal signals
Enable Core Dumps
# Enable for current session
ulimit -c unlimited
# Verify
ulimit -c
Generate and Analyze
# Run until crash
./ikigai
# Produces: core or core.<pid>
# Analyze
gdb ./ikigai core
Key Commands
bt # Backtrace - where it crashed
bt full # Backtrace with local variables
frame N # Select stack frame
info locals # Variables in current frame
print var # Inspect variable
list # Source at crash point
info registers # CPU state at crash
x/20x $sp # Examine stack memory
Finding the Core File
# Check core pattern
cat /proc/sys/kernel/core_pattern
# Common locations
ls -la core*
ls -la /var/crash/
Workflow
- Enable core dumps:
ulimit -c unlimited - Run app until crash
- Load core:
gdb ./ikigai core - Get backtrace:
bt full - Inspect frames and variables
References
- GDB manual: https://sourceware.org/gdb/current/onlinedocs/gdb/
- See
gdbserver.mdfor live debugging
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