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| author | Tian Gao <gaogaotiantian@hotmail.com> | 2024-04-29 08:54:52 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-04-29 08:54:52 (GMT) |
| commit | 375c94c75dd9eaefaddd89a7f704a031441af286 (patch) | |
| tree | d0de838e2aac579a125283531a4042bf178c2bfd /Objects/frameobject.c | |
| parent | c7e7bfc4ca26bf90e0d4959e303770fbfc3a3795 (diff) | |
| download | cpython-375c94c75dd9eaefaddd89a7f704a031441af286.zip cpython-375c94c75dd9eaefaddd89a7f704a031441af286.tar.gz cpython-375c94c75dd9eaefaddd89a7f704a031441af286.tar.bz2 | |
gh-107674: Lazy load line number to improve performance of tracing (GH-118127)
Diffstat (limited to 'Objects/frameobject.c')
| -rw-r--r-- | Objects/frameobject.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/Objects/frameobject.c b/Objects/frameobject.c index 07b7ef3..36538b1 100644 --- a/Objects/frameobject.c +++ b/Objects/frameobject.c @@ -41,12 +41,20 @@ int PyFrame_GetLineNumber(PyFrameObject *f) { assert(f != NULL); - if (f->f_lineno != 0) { - return f->f_lineno; + if (f->f_lineno == -1) { + // We should calculate it once. If we can't get the line number, + // set f->f_lineno to 0. + f->f_lineno = PyUnstable_InterpreterFrame_GetLine(f->f_frame); + if (f->f_lineno < 0) { + f->f_lineno = 0; + return -1; + } } - else { - return PyUnstable_InterpreterFrame_GetLine(f->f_frame); + + if (f->f_lineno > 0) { + return f->f_lineno; } + return PyUnstable_InterpreterFrame_GetLine(f->f_frame); } static PyObject * |