cpython: e1c6f8895fd8 (original) (raw)

Mercurial > cpython

changeset 101080:e1c6f8895fd8 3.5

python-gdb.py: get C types at runtime Issue #26799: Fix python-gdb.py: don't get once C types when the Python code is loaded, but get C types on demande. The C types can change if python-gdb.py is loaded before the Python executable. Patch written by Thomas Ilsche. [#26799]

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--- a/Misc/ACKS +++ b/Misc/ACKS @@ -648,6 +648,7 @@ Catalin Iacob Mihai Ibanescu Ali Ikinci Aaron Iles +Thomas Ilsche Lars Immisch Bobby Impollonia Naoki Inada

--- a/Misc/NEWS +++ b/Misc/NEWS @@ -467,6 +467,11 @@ Windows Tools/Demos ----------- +- Issue #26799: Fix python-gdb.py: don't get once C types when the Python code

• is loaded, but get C types on demande. The C types can change if
• python-gdb.py is loaded before the Python executable. Patch written by Thomas
• Ilsche. +

• Issue #26271: Fix the Freeze tool to properly use flags passed through configure. Patch by Daniel Shaulov.

--- a/Tools/gdb/libpython.py +++ b/Tools/gdb/libpython.py @@ -56,16 +56,35 @@ if sys.version_info[0] >= 3: long = int

Look up the gdb.Type for some standard types:

-_type_char_ptr = gdb.lookup_type('char').pointer() # char* -_type_unsigned_char_ptr = gdb.lookup_type('unsigned char').pointer() # unsigned char* -_type_void_ptr = gdb.lookup_type('void').pointer() # void* -_type_unsigned_short_ptr = gdb.lookup_type('unsigned short').pointer() -_type_unsigned_int_ptr = gdb.lookup_type('unsigned int').pointer() +# Those need to be refreshed as types (pointer sizes) may change when +# gdb loads different executables + + +def _type_char_ptr():

• return gdb.lookup_type('char').pointer() # char*

+ + +def _type_unsigned_char_ptr():

• return gdb.lookup_type('unsigned char').pointer() # unsigned char*

+ + +def _type_void_ptr():

• return gdb.lookup_type('void').pointer() # void*

+ + +def _type_unsigned_short_ptr():

• return gdb.lookup_type('unsigned short').pointer()

+ + +def _type_unsigned_int_ptr():

• return gdb.lookup_type('unsigned int').pointer()

value computed later, see PyUnicodeObjectPtr.proxy()

_is_pep393 = None -SIZEOF_VOID_P = _type_void_ptr.sizeof + +def _sizeof_void_p():

• return _type_void_ptr().sizeof

Py_TPFLAGS_HEAPTYPE = (1 << 9) @@ -460,8 +479,8 @@ def _PyObject_VAR_SIZE(typeobj, nitems): return ( ( typeobj.field('tp_basicsize') + nitems * typeobj.field('tp_itemsize') +

•           (SIZEOF_VOID_P - 1)[](#l3.49)

•         ) & ~(SIZEOF_VOID_P - 1)[](#l3.50)

•           (_sizeof_void_p() - 1)[](#l3.51)

•         ) & ~(_sizeof_void_p() - 1)[](#l3.52)
        ).cast(_PyObject_VAR_SIZE._type_size_t)[](#l3.53)

_PyObject_VAR_SIZE._type_size_t = None @@ -485,9 +504,9 @@ class HeapTypeObjectPtr(PyObjectPtr): size = _PyObject_VAR_SIZE(typeobj, tsize) dictoffset += size assert dictoffset > 0

•                assert dictoffset % SIZEOF_VOID_P == 0[](#l3.60)

•                assert dictoffset % _sizeof_void_p() == 0[](#l3.61)

•            dictptr = self._gdbval.cast(_type_char_ptr) + dictoffset[](#l3.63)

•            dictptr = self._gdbval.cast(_type_char_ptr()) + dictoffset[](#l3.64)
             PyObjectPtrPtr = PyObjectPtr.get_gdb_type().pointer()[](#l3.65)
             dictptr = dictptr.cast(PyObjectPtrPtr)[](#l3.66)
             return PyObjectPtr.from_pyobject_ptr(dictptr.dereference())[](#l3.67)

@@ -1004,7 +1023,7 @@ class PyBytesObjectPtr(PyObjectPtr): def str(self): field_ob_size = self.field('ob_size') field_ob_sval = self.field('ob_sval')

•    char_ptr = field_ob_sval.address.cast(_type_unsigned_char_ptr)[](#l3.72)

•    char_ptr = field_ob_sval.address.cast(_type_unsigned_char_ptr())[](#l3.73)
     return ''.join([chr(char_ptr[i]) for i in safe_range(field_ob_size)])[](#l3.74)

def proxyval(self, visited): @@ -1135,11 +1154,11 @@ class PyUnicodeObjectPtr(PyObjectPtr): field_str = self.field('data')['any'] repr_kind = int(state['kind']) if repr_kind == 1:

•                field_str = field_str.cast(_type_unsigned_char_ptr)[](#l3.81)

•                field_str = field_str.cast(_type_unsigned_char_ptr())[](#l3.82)
             elif repr_kind == 2:[](#l3.83)

•                field_str = field_str.cast(_type_unsigned_short_ptr)[](#l3.84)

•                field_str = field_str.cast(_type_unsigned_short_ptr())[](#l3.85)
             elif repr_kind == 4:[](#l3.86)

•                field_str = field_str.cast(_type_unsigned_int_ptr)[](#l3.87)

•                field_str = field_str.cast(_type_unsigned_int_ptr())[](#l3.88)
     else:[](#l3.89)
         # Python 3.2 and earlier[](#l3.90)
         field_length = long(self.field('length'))[](#l3.91)