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9f426491ca
This works like:
```
(gdb) cfp
CFP (count=3, addr=0x7ffff73fef50):
$1 = {pc = 0x555556bf7818, sp = 0x7ffff72ff078, iseq = 0x7ffff2603270, self = 140737344619296, ep = 0x7ffff72ff058, block_code = 0x0,
__bp__ = 0x7ffff72ff060, jit_return = 0x555558c2b000}
Stack (size=3):
[0] FIXNUM: 1
[1] T_STRING: "" bytesize:0 (embed) encoding:1 coderange:7bit $2 = (struct RString *) 0x7ffff249ea80
[2] [PROMOTED] T_OBJECT: $3 = {flags = 21474844769, klass = 140737344040416}
$4 = {0x24, 0x24, 0x24}
(gdb) cfp + 1
CFP (count=3, addr=0x7ffff73fef90):
$5 = {pc = 0x5555567a78f8, sp = 0x7ffff72ff040, iseq = 0x7ffff26032d0, self = 140737344619296, ep = 0x7ffff72ff038, block_code = 0x0,
__bp__ = 0x7ffff72ff040, jit_return = 0x555558c2b000}
Stack (size=0):
```
33 lines
1.1 KiB
Python
33 lines
1.1 KiB
Python
# 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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