pytorch/tools/gdb/pytorch-gdb.py
Sam Estep 737d920b21 Strictly type everything in .github and tools (#59117)
Summary:
This PR greatly simplifies `mypy-strict.ini` by strictly typing everything in `.github` and `tools`, rather than picking and choosing only specific files in those two dirs. It also removes `warn_unused_ignores` from `mypy-strict.ini`, for reasons described in https://github.com/pytorch/pytorch/pull/56402#issuecomment-822743795: basically, that setting makes life more difficult depending on what libraries you have installed locally vs in CI (e.g. `ruamel`).

Pull Request resolved: https://github.com/pytorch/pytorch/pull/59117

Test Plan:
```
flake8
mypy --config mypy-strict.ini
```

Reviewed By: malfet

Differential Revision: D28765386

Pulled By: samestep

fbshipit-source-id: 3e744e301c7a464f8a2a2428fcdbad534e231f2e
2021-06-07 14:49:36 -07:00

53 lines
1.8 KiB
Python

import gdb # type: ignore[import]
import textwrap
from typing import Any
class DisableBreakpoints:
"""
Context-manager to temporarily disable all gdb breakpoints, useful if
there is a risk to hit one during the evaluation of one of our custom
commands
"""
def __enter__(self) -> None:
self.disabled_breakpoints = []
for b in gdb.breakpoints():
if b.enabled:
b.enabled = False
self.disabled_breakpoints.append(b)
def __exit__(self, etype: Any, evalue: Any, tb: Any) -> None:
for b in self.disabled_breakpoints:
b.enabled = True
class TensorRepr(gdb.Command): # type: ignore[misc, no-any-unimported]
"""
Print a human readable representation of the given at::Tensor.
Usage: torch-tensor-repr EXP
at::Tensor instances do not have a C++ implementation of a repr method: in
pytoch, this is done by pure-Python code. As such, torch-tensor-repr
internally creates a Python wrapper for the given tensor and call repr()
on it.
"""
__doc__ = textwrap.dedent(__doc__).strip()
def __init__(self) -> None:
gdb.Command.__init__(self, 'torch-tensor-repr',
gdb.COMMAND_USER, gdb.COMPLETE_EXPRESSION)
def invoke(self, args: str, from_tty: bool) -> None:
args = gdb.string_to_argv(args)
if len(args) != 1:
print('Usage: torch-tensor-repr EXP')
return
name = args[0]
with DisableBreakpoints():
res = gdb.parse_and_eval('torch::gdb::tensor_repr(%s)' % name)
print('Python-level repr of %s:' % name)
print(res.string())
# torch::gdb::tensor_repr returns a malloc()ed buffer, let's free it
gdb.parse_and_eval('(void)free(%s)' % int(res))
TensorRepr()