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gh-59013: Make line number of function breakpoint more precise (#110582)

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Tian Gao 2023-10-27 14:01:31 -07:00 • committed by GitHub
parent 77bb0d5f50
commit 1c9a0c4079
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3 changed files with 63 additions and 3 deletions
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19
Lib/pdb.py
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@ -887,7 +887,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
#use co_name to identify the bkpt (function names
#could be aliased, but co_name is invariant)
funcname = code.co_name
lineno = code.co_firstlineno
lineno = self._find_first_executable_line(code)
filename = code.co_filename
except:
# last thing to try
@ -990,6 +990,23 @@ class Pdb(bdb.Bdb, cmd.Cmd):
return 0
return lineno
def _find_first_executable_line(self, code):
""" Try to find the first executable line of the code object.
Equivalently, find the line number of the instruction that's
after RESUME
Return code.co_firstlineno if no executable line is found.
"""
prev = None
for instr in dis.get_instructions(code):
if prev is not None and prev.opname == 'RESUME':
if instr.positions.lineno is not None:
return instr.positions.lineno
return code.co_firstlineno
prev = instr
return code.co_firstlineno
def do_enable(self, arg):
"""enable bpnumber [bpnumber ...]