[unittests][Support] Fix LLVM-Unit :: Support/./SupportTests/FileSystemTest.permissions on Solaris

LLVM-Unit :: Support/./SupportTests/FileSystemTest.permissions currently
FAILs on Solaris:

  FAIL: LLVM-Unit :: Support/./SupportTests/FileSystemTest.permissions (2940 of 51555)
  ******************** TEST 'LLVM-Unit :: Support/./SupportTests/FileSystemTest.permissions' FAILED ********************
  Note: Google Test filter = FileSystemTest.permissions
  [==========] Running 1 test from 1 test case.
  [----------] Global test environment set-up.
  [----------] 1 test from FileSystemTest
  [ RUN      ] FileSystemTest.permissions
  /opt/llvm-buildbot/obj/llvm/llvm.src/unittests/Support/Path.cpp:1705: Failure
  Value of: CheckPermissions(fs::sticky_bit)
    Actual: false
  Expected: true
  /opt/llvm-buildbot/obj/llvm/llvm.src/unittests/Support/Path.cpp:1712: Failure
  Value of: CheckPermissions(fs::set_uid_on_exe | fs::set_gid_on_exe | fs::sticky_bit)
    Actual: false
  Expected: true
  /opt/llvm-buildbot/obj/llvm/llvm.src/unittests/Support/Path.cpp:1719: Failure
  Value of: CheckPermissions(fs::all_read | fs::set_uid_on_exe | fs::set_gid_on_exe | fs::sticky_bit)
    Actual: false
  Expected: true
  /opt/llvm-buildbot/obj/llvm/llvm.src/unittests/Support/Path.cpp:1722: Failure
  Value of: CheckPermissions(fs::all_perms)
    Actual: false
  Expected: true
  [  FAILED  ] FileSystemTest.permissions (0 ms)
  [----------] 1 test from FileSystemTest (0 ms total)
  
  [----------] Global test environment tear-down
  [==========] 1 test from 1 test case ran. (1 ms total)
  [  PASSED  ] 0 tests.
  [  FAILED  ] 1 test, listed below:
  [  FAILED  ] FileSystemTest.permissions
  
   1 FAILED TEST

Checking with truss reveals that this is the same issue as on AIX and
documented in chmod(2):

  If the process is not a privileged process and the file is not a direc-
  tory, mode bit 01000 (S_ISVTX, the sticky bit) is cleared.

The following patch fixes this in the same way.  Tested on amd64-pc-solaris2.11.

Differential Revision: https://reviews.llvm.org/D63598


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@364671 91177308-0d34-0410-b5e6-96231b3b80d8

unittests/Support/Path.cpp

@@ -1751,9 +1751,10 @@ TEST_F(FileSystemTest, permissions) {
   EXPECT_TRUE(CheckPermissions(fs::set_gid_on_exe));
 
   // Modern BSDs require root to set the sticky bit on files.
-  // AIX without root will mask off (i.e., lose) the sticky bit on files.
+  // AIX and Solaris without root will mask off (i.e., lose) the sticky bit
+  // on files.
 #if !defined(__FreeBSD__) && !defined(__NetBSD__) && !defined(__OpenBSD__) &&  \
-    !defined(_AIX)
+    !defined(_AIX) && !(defined(__sun__) && defined(__svr4__))
   EXPECT_EQ(fs::setPermissions(TempPath, fs::sticky_bit), NoError);
   EXPECT_TRUE(CheckPermissions(fs::sticky_bit));