derek.holloway
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37 lines
1.3 KiB
C
37 lines
1.3 KiB
C
// This test checks that implicit modules do not encounter a deadlock on a dependency cycle.
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// RUN: rm -rf %t
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// RUN: split-file %s %t
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// RUN: %python %t/run_concurrently.py \
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// RUN: "not %clang -fsyntax-only -fmodules -fmodules-cache-path=%t/cache -fimplicit-modules-lock-timeout=3 %t/tu1.c 2> %t/err1" \
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// RUN: "not %clang -fsyntax-only -fmodules -fmodules-cache-path=%t/cache -fimplicit-modules-lock-timeout=3 %t/tu2.c 2> %t/err2"
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// RUN: FileCheck %s --input-file %t/err1 --check-prefix=CHECK1
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// RUN: FileCheck %s --input-file %t/err2 --check-prefix=CHECK2
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// CHECK1: fatal error: cyclic dependency in module 'M': M -> N -> M
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// CHECK2: fatal error: cyclic dependency in module 'N': N -> M -> N
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//--- run_concurrently.py
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import subprocess, sys, threading
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def run(cmd):
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subprocess.run(cmd, shell=True)
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threads = [threading.Thread(target=run, args=(cmd,)) for cmd in sys.argv[1:]]
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for t in threads: t.start()
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for t in threads: t.join()
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//--- tu1.c
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#include "m.h"
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//--- tu2.c
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#include "n.h"
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//--- module.modulemap
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module M { header "m.h" }
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module N { header "n.h" }
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//--- m.h
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#pragma clang __debug sleep // Give enough time for tu2.c to start building N.
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#include "n.h"
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//--- n.h
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#pragma clang __debug sleep // Give enough time for tu1.c to start building M.
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#include "m.h"
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