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gdb.py: Print Env based on EP instead of BP

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because EP could be escaped.
This commit is contained in:
Takashi Kokubun 2023-08-02 16:23:17 -07:00
parent 32e828bb4a
commit 5f5cc22b5f
1 changed files with 23 additions and 5 deletions
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28
misc/gdb.py
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@ -75,9 +75,9 @@ class CFP(gdb.Command):
print()
print('Env:')
self.print_stack(cfp, -3, self.rp(cfp, -3))
self.print_stack(cfp, -2, self.specval(cfp, -2))
self.print_stack(cfp, -1, self.frame_types(cfp, -1))
self.print_env(cfp, -3, self.rp_env(cfp, -3))
self.print_env(cfp, -2, self.specval(cfp, -2))
self.print_env(cfp, -1, self.frame_types(cfp, -1))
print()
if args.stack_size is not None:
@ -89,6 +89,16 @@ class CFP(gdb.Command):
self.print_stack(cfp, i, self.rp(cfp, i))
print(self.regs(cfp, stack_size))
def print_env(self, cfp, bp_index, content):
ep_index = bp_index + 1
address = self.get_int(f'((rb_control_frame_t *){cfp})->ep + {ep_index}')
value = self.get_env(cfp, bp_index)
regs = self.regs(cfp, bp_index)
if content:
content = textwrap.indent(content, ' ' * 3).lstrip() # Leave the regs column empty
content = f'{content} '
print('{:2} 0x{:x} [{}] {}(0x{:x})'.format(regs, address, bp_index, content, value))
def print_stack(self, cfp, bp_index, content):
address = self.get_int(f'vm_base_ptr({cfp}) + {bp_index}')
value = self.get_value(cfp, bp_index)
@ -110,9 +120,13 @@ class CFP(gdb.Command):
value = self.get_value(cfp, bp_index)
return self.get_string(f'rp {value}').rstrip()
def rp_env(self, cfp, bp_index):
value = self.get_env(cfp, bp_index)
return self.get_string(f'rp {value}').rstrip()
# specval: block_handler or previous EP
def specval(self, cfp, bp_index):
value = self.get_value(cfp, bp_index)
value = self.get_env(cfp, bp_index)
if value == 0:
return 'VM_BLOCK_HANDLER_NONE'
if value == self.get_int('rb_block_param_proxy'):
@ -121,7 +135,7 @@ class CFP(gdb.Command):
def frame_types(self, cfp, bp_index):
types = []
value = self.get_value(cfp, bp_index)
value = self.get_env(cfp, bp_index)
magic_mask = self.get_int('VM_FRAME_MAGIC_MASK')
for magic in self.FRAME_MAGICS:
@ -136,6 +150,10 @@ class CFP(gdb.Command):
return ' | '.join(types)
def get_env(self, cfp, bp_index):
ep_index = bp_index + 1
return self.get_int(f'((rb_control_frame_t *){cfp})->ep[{ep_index}]')
def get_value(self, cfp, bp_index):
return self.get_int(f'vm_base_ptr({cfp})[{bp_index}]')