34 lines
1.1 KiB
Python
34 lines
1.1 KiB
Python
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# Usage:
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# cfp: Dump the current cfp
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# cfp + 1: Dump the caller cfp
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class CFP(gdb.Command):
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def __init__(self):
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super(CFP, self).__init__('cfp', gdb.COMMAND_USER)
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def invoke(self, offset, from_tty):
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if not offset:
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offset = '0'
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cfp = f'(ruby_current_ec->cfp + ({offset}))'
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end_cfp = self.get_int('ruby_current_ec->vm_stack + ruby_current_ec->vm_stack_size')
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cfp_count = int((end_cfp - self.get_int('ruby_current_ec->cfp')) / self.get_int('sizeof(rb_control_frame_t)'))
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print('CFP (count={}, addr=0x{:x}):'.format(cfp_count, self.get_int(cfp)))
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gdb.execute(f'p *({cfp})')
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print()
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stack_size = int((self.get_int(f'{cfp}->sp') - self.get_int(f'{cfp}->__bp__')) / 8)
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print(f'Stack (size={stack_size}):')
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for i in range(0, stack_size):
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obj = self.get_int(f'{cfp}->__bp__[{i}]')
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rp = self.get_string(f'rp {obj}')
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print(f'[{i}] {rp}', end='')
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def get_int(self, expr):
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return int(self.get_string(f'printf "%ld", ({expr})'))
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def get_string(self, expr):
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return gdb.execute(expr, to_string=True)
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CFP()
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