https://github.com/python/cpython/commit/27a529277486c770a5a8ef2a01c151b5feeb2eca
commit: 27a529277486c770a5a8ef2a01c151b5feeb2eca
branch: 3.13
author: Miss Islington (bot) <31488909+miss-isling...@users.noreply.github.com>
committer: brandtbucher <brandtbuc...@gmail.com>
date: 2024-08-08T13:37:49-07:00
summary:
[3.13] GH-118943: Handle races when moving jit_stencils.h (GH-122709)
(cherry picked from commit 44659d392751f0161a0f958fec39ad013da45427)
Co-authored-by: Miro Hrončok <m...@hroncok.cz>
Co-authored-by: Kirill Podoprigora <kirill.ba...@mail.ru>
files:
A Misc/NEWS.d/next/Build/2024-06-18-15-28-25.gh-issue-118943.aie7nn.rst
M Tools/jit/_targets.py
diff --git
a/Misc/NEWS.d/next/Build/2024-06-18-15-28-25.gh-issue-118943.aie7nn.rst
b/Misc/NEWS.d/next/Build/2024-06-18-15-28-25.gh-issue-118943.aie7nn.rst
new file mode 100644
index 00000000000000..997c990a96e476
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2024-06-18-15-28-25.gh-issue-118943.aie7nn.rst
@@ -0,0 +1,3 @@
+Fix a possible race condition affecting parallel builds configured with
+``--enable-experimental-jit``, in which :exc:`FileNotFoundError` could be
caused by
+another process already moving ``jit_stencils.h.new`` to ``jit_stencils.h``.
diff --git a/Tools/jit/_targets.py b/Tools/jit/_targets.py
index 5604c429bcf8ad..73d10a128756eb 100644
--- a/Tools/jit/_targets.py
+++ b/Tools/jit/_targets.py
@@ -221,7 +221,12 @@ def build(
file.write("\n")
for line in _writer.dump(stencil_groups):
file.write(f"{line}\n")
- jit_stencils_new.replace(jit_stencils)
+ try:
+ jit_stencils_new.replace(jit_stencils)
+ except FileNotFoundError:
+ # another process probably already moved the file
+ if not jit_stencils.is_file():
+ raise
finally:
jit_stencils_new.unlink(missing_ok=True)
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