diff options
| -rwxr-xr-x | Tools/gdb/libpython.py | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/Tools/gdb/libpython.py b/Tools/gdb/libpython.py index 74165ac..5fdc812 100755 --- a/Tools/gdb/libpython.py +++ b/Tools/gdb/libpython.py @@ -255,7 +255,7 @@ class PyObjectPtr(object): Derived classes will override this. - For example, a PyIntObject* with ob_ival 42 in the inferior process + For example, a PyLongObjectPtr* with long_value 42 in the inferior process should result in an int(42) in this process. visited: a set of all gdb.Value pyobject pointers already visited @@ -867,7 +867,7 @@ class PyLongObjectPtr(PyObjectPtr): def proxyval(self, visited): ''' - Python's Include/longobjrep.h has this declaration: + Python's Include/longinterpr.h has this declaration: typedef struct _PyLongValue { uintptr_t lv_tag; /* Number of digits, sign and flags */ @@ -876,14 +876,18 @@ class PyLongObjectPtr(PyObjectPtr): struct _longobject { PyObject_HEAD - _PyLongValue long_value; + _PyLongValue long_value; }; with this description: The absolute value of a number is equal to - SUM(for i=0 through abs(ob_size)-1) ob_digit[i] * 2**(SHIFT*i) - Negative numbers are represented with ob_size < 0; - zero is represented by ob_size == 0. + SUM(for i=0 through ndigits-1) ob_digit[i] * 2**(PyLong_SHIFT*i) + The sign of the value is stored in the lower 2 bits of lv_tag. + - 0: Positive + - 1: Zero + - 2: Negative + The third lowest bit of lv_tag is reserved for an immortality flag, but is + not currently used. where SHIFT can be either: #define PyLong_SHIFT 30 |