[gcc r13-3033] libsanitizer: Fix Solaris 11.3 compilation of sanitizer_procmaps_solaris.cpp [PR105531]

[gcc r13-3033] libsanitizer: Fix Solaris 11.3 compilation of sanitizer_procmaps_solaris.cpp [PR105531]

[Rainer Orth]

https://gcc.gnu.org/g:77d0627c244f7520bf74ec9cf2a8b69c32b6d30d

commit r13-3033-g77d0627c244f7520bf74ec9cf2a8b69c32b6d30d
Author: Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
Date:   Mon Oct 3 16:28:46 2022 +0200

    libsanitizer: Fix Solaris 11.3 compilation of sanitizer_procmaps_solaris.cpp [PR105531]
    
    The latest libsanitizer import broke Solaris 11.3 bootstrap again, due
    to an oversight of mine.  A fix has been committed upstream
    
            https://reviews.llvm.org/D133556
    
    This patch cherry-picks it.  Tested on Solaris 11.3 and 11.4, SPARC and
    x86.
    
    2022-09-23  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
    
            libsanitizer:
            PR sanitizer/105531
            * sanitizer_common/sanitizer_procmaps_solaris.cpp: Cherry-pick
            llvm-project revision 1cd4d63fb9ab0f04c7151911dde0d58b673823de.

Diff:
---
 libsanitizer/sanitizer_common/sanitizer_procmaps_solaris.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libsanitizer/sanitizer_common/sanitizer_procmaps_solaris.cpp b/libsanitizer/sanitizer_common/sanitizer_procmaps_solaris.cpp
index 6f43817aedb..eeb49e2afe3 100644
--- a/libsanitizer/sanitizer_common/sanitizer_procmaps_solaris.cpp
+++ b/libsanitizer/sanitizer_common/sanitizer_procmaps_solaris.cpp
@@ -9,6 +9,8 @@
 // Information about the process mappings (Solaris-specific parts).
 //===----------------------------------------------------------------------===//
 
+// Before Solaris 11.4, <procfs.h> doesn't work in a largefile environment.
+#undef _FILE_OFFSET_BITS
 #include "sanitizer_platform.h"
 #if SANITIZER_SOLARIS
 #  include <fcntl.h>