A python script to help debug -Wframe-larger-than= warnings.
$ make CC=clang arch/x86/kernel/kvm.o CFLAGS=-Wframe-larger-than=1000
...
arch/x86/kernel/kvm.c:494:13: warning: stack frame size of 1064 bytes in function 'kvm_send_ipi_mask_allbutself' [-Wframe-larger-than=]
static void kvm_send_ipi_mask_allbutself(const struct cpumask *mask, int vector)
^
$ python3 frame_larger_than.py arch/x86/kernel/kvm.o kvm_send_ipi_mask_allbutself
kvm_send_ipi_mask_allbutself:
1024 struct cpumask new_mask
4 unsigned int this_cpu
8 const struct cpumask* local_mask
4 int pscr_ret__
4 int pfo_ret__
cpumask_copy:
bitmap_copy:
4 unsigned int len
4 unsigned int len
cpumask_clear_cpu:
clear_bit:
arch_clear_bit:A little bit friendlier than trying to understand
readelf --debug-dump=info *.o.
$ sudo -H pip3 install pyelftools$ pip3 install pyformat
$ pyformat --in-place frame_larger_than.py