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[3.12] gh-110429: Fix race condition in "make regen-all" (GH-110433) #110438

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vstinner merged 1 commit into from
Oct 5, 2023
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[3.12] gh-110429: Fix race condition in "make regen-all" (GH-110433) #110438

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gh-110429: Fix race condition in "make regen-all" (GH-110433) 
"make regen-pegen" now creates a temporary file called "parser.c.new"
instead of "parser.new.c". Previously, if "make clinic" was run in
parallel with "make regen-all", clinic may try but fail to open
"parser.new.c" if the temporay file was removed in the meanwhile.
(cherry picked from commit fb6c4ed)

Co-authored-by: Victor Stinner <vstinner@python.org>
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@vstinner @miss-islington
vstinner authored and miss-islington committed Oct 5, 2023
commit 73825041d65fa5fabc849612dcdede4676452776
4 changes: 2 additions & 2 deletions Makefile.pre.in
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Original file line number Diff line number Diff line change
Expand Up @@ -1396,8 +1396,8 @@ regen-pegen:
PYTHONPATH=$(srcdir)/Tools/peg_generator $(PYTHON_FOR_REGEN) -m pegen -q c \
$(srcdir)/Grammar/python.gram \
$(srcdir)/Grammar/Tokens \
-o $(srcdir)/Parser/parser.new.c
$(UPDATE_FILE) $(srcdir)/Parser/parser.c $(srcdir)/Parser/parser.new.c
-o $(srcdir)/Parser/parser.c.new
$(UPDATE_FILE) $(srcdir)/Parser/parser.c $(srcdir)/Parser/parser.c.new

.PHONY: regen-ast
regen-ast:
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