1. Remove the limitation of dump
ulimit -c unlimited
2. Indicate system to dump a core
touch /.init_enable_core
3. Set the path of dumped core
sysctl -w "kernel.core_pattern=/tmp/%e.%p.%s.%t.core"
These message would show on crash of process:
Segmentation fault (core dumped) root@XXX:~# ls /tmp/*.core demo_crash.5486.11.1470130615.core
is it possible to analyse on a host machine a coredump produced on the target machine? I could not build an image with gdb in it that fits the space available on the flash of the target.
ReplyDeleteNo need to build gdb for the router.
ReplyDeleteJust copy the binary onto your build-computer and run gdb from the existing toolchain:
./staging_dir/toolchain-mips_24kc_gcc-8.3.0_musl/bin/mips-openwrt-linux-gdb build_dir/target-mips_24kc_musl/resolveip/resolveip /tmp/resolveip.6536.11.1573199523.core