1 // This test checks that reusing FileManager produces deterministic results on case-insensitive filesystems. 2 3 // RUN: rm -rf %t 4 // RUN: split-file %s %t 5 6 //--- dir1/arm/lower.h 7 //--- dir2/ARM/upper.h 8 //--- t1.c 9 #include "upper.h" 10 //--- t2.c 11 #include "arm/lower.h" 12 13 //--- cdb.json.template 14 [{ 15 "directory": "DIR", 16 "command": "clang -fsyntax-only DIR/t1.c -I DIR/dir2/ARM -I DIR/dir1", 17 "file": "DIR/t1.c" 18 },{ 19 "directory": "DIR", 20 "command": "clang -fsyntax-only DIR/t2.c -I DIR/dir2 -I DIR/dir1", 21 "file": "DIR/t2.c" 22 }] 23 24 //--- cdb-rev.json.template 25 [{ 26 "directory": "DIR", 27 "command": "clang -fsyntax-only DIR/t2.c -I DIR/dir2 -I DIR/dir1", 28 "file": "DIR/t2.c" 29 },{ 30 "directory": "DIR", 31 "command": "clang -fsyntax-only DIR/t1.c -I DIR/dir2/ARM -I DIR/dir1", 32 "file": "DIR/t1.c" 33 }] 34 35 // RUN: sed -e "s|DIR|%/t|g" %t/cdb.json.template > %t/cdb.json 36 // RUN: sed -e "s|DIR|%/t|g" %t/cdb-rev.json.template > %t/cdb-rev.json 37 38 // RUN: clang-scan-deps -compilation-database=%t/cdb.json -format make -j 1 | sed 's:\\\\\?:/:g' | FileCheck %s 39 40 // In the reversed case, Clang starts by scanning "t2.c". When looking up the "arm/lower.h" header, 41 // the string is appended to "DIR/dir2". That file ("DIR/dir2/arm/lower.h") doesn't exist, but when 42 // learning so, the FileManager stats and caches the parent directory ("DIR/dir2/arm"), using the 43 // UID as the key. 44 // When scanning "t1.c" later on, the "DIR/dir2/ARM" search directory is assigned the **same** 45 // directory entry (with lowercase "arm"), since they share the UID on case-insensitive filesystems. 46 // To preserve the correct case throughout the compiler for any file within that directory, it's 47 // important to use the spelling actually used, not just the cached one. 48 // RUN: clang-scan-deps -compilation-database=%t/cdb-rev.json -format make -j 1 | sed 's:\\\\\?:/:g' | FileCheck %s 49 50 // CHECK: ARM/upper.h 51