diff options
Diffstat (limited to 'Include/internal/pycore_frame.h')
| -rw-r--r-- | Include/internal/pycore_frame.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/Include/internal/pycore_frame.h b/Include/internal/pycore_frame.h index 5806cf0..856297a 100644 --- a/Include/internal/pycore_frame.h +++ b/Include/internal/pycore_frame.h @@ -19,6 +19,7 @@ struct _frame { struct _PyInterpreterFrame *f_frame; /* points to the frame data */ PyObject *f_trace; /* Trace function */ int f_lineno; /* Current line number. Only valid if non-zero */ + int f_last_traced_line; /* The last line traced for this frame */ char f_trace_lines; /* Emit per-line trace events? */ char f_trace_opcodes; /* Emit per-opcode trace events? */ char f_fast_as_locals; /* Have the fast locals of this frame been converted to a dict? */ @@ -137,10 +138,16 @@ _PyFrame_GetLocalsArray(_PyInterpreterFrame *frame) return frame->localsplus; } +/* Fetches the stack pointer, and sets stacktop to -1. + Having stacktop <= 0 ensures that invalid + values are not visible to the cycle GC. + We choose -1 rather than 0 to assist debugging. */ static inline PyObject** _PyFrame_GetStackPointer(_PyInterpreterFrame *frame) { - return frame->localsplus+frame->stacktop; + PyObject **sp = frame->localsplus + frame->stacktop; + frame->stacktop = -1; + return sp; } static inline void |