derek.holloway
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51 lines
1.8 KiB
C
51 lines
1.8 KiB
C
// This test checks that reusing FileManager produces deterministic results on case-insensitive filesystems.
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// RUN: rm -rf %t
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// RUN: split-file %s %t
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//--- dir1/arm/lower.h
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//--- dir2/ARM/upper.h
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//--- t1.c
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#include "upper.h"
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//--- t2.c
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#include "arm/lower.h"
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//--- cdb.json.template
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[{
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"directory": "DIR",
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"command": "clang -fsyntax-only DIR/t1.c -I DIR/dir2/ARM -I DIR/dir1",
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"file": "DIR/t1.c"
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},{
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"directory": "DIR",
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"command": "clang -fsyntax-only DIR/t2.c -I DIR/dir2 -I DIR/dir1",
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"file": "DIR/t2.c"
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}]
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//--- cdb-rev.json.template
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[{
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"directory": "DIR",
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"command": "clang -fsyntax-only DIR/t2.c -I DIR/dir2 -I DIR/dir1",
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"file": "DIR/t2.c"
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},{
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"directory": "DIR",
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"command": "clang -fsyntax-only DIR/t1.c -I DIR/dir2/ARM -I DIR/dir1",
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"file": "DIR/t1.c"
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}]
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// RUN: sed -e "s|DIR|%/t|g" %t/cdb.json.template > %t/cdb.json
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// RUN: sed -e "s|DIR|%/t|g" %t/cdb-rev.json.template > %t/cdb-rev.json
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// RUN: clang-scan-deps -compilation-database=%t/cdb.json -format make -j 1 | sed 's:\\\\\?:/:g' | FileCheck %s
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// In the reversed case, Clang starts by scanning "t2.c". When looking up the "arm/lower.h" header,
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// the string is appended to "DIR/dir2". That file ("DIR/dir2/arm/lower.h") doesn't exist, but when
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// learning so, the FileManager stats and caches the parent directory ("DIR/dir2/arm"), using the
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// UID as the key.
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// When scanning "t1.c" later on, the "DIR/dir2/ARM" search directory is assigned the **same**
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// directory entry (with lowercase "arm"), since they share the UID on case-insensitive filesystems.
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// To preserve the correct case throughout the compiler for any file within that directory, it's
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// important to use the spelling actually used, not just the cached one.
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// RUN: clang-scan-deps -compilation-database=%t/cdb-rev.json -format make -j 1 | sed 's:\\\\\?:/:g' | FileCheck %s
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// CHECK: ARM/upper.h
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