svn commit: r360876 - stable/11/contrib/llvm-project/llvm/lib/Support/Unix

[Ed Maste]

Author: emaste
Date: Sun May 10 14:59:01 2020
New Revision: 360876
URL: https://svnweb.freebsd.org/changeset/base/360876

Log:
  MFC r360801: Merge commit 21e5e1724b75 from llvm git:
  
    getMainExecutable: Fix hand-rolled AT_EXECPATH for older FreeBSD
  
    Once we hit AT_NULL, we need to bail out of the loop; not just the
    enclosing switch.  This fixes basic usage (e.g. `cc --version`) when
    AT_EXECPATH isn't present on older branches (e.g. under
    emu-user-static, at the moment), where we would previously run off
    the end of ::environ.
  
    Patch By: kevans
  
    Reviewed By: arichardson

Modified:
  stable/11/contrib/llvm-project/llvm/lib/Support/Unix/Path.inc
Directory Properties:
  stable/11/   (props changed)
  stable/11/contrib/llvm-project/llvm/   (props changed)

Modified: stable/11/contrib/llvm-project/llvm/lib/Support/Unix/Path.inc
==============================================================================
--- stable/11/contrib/llvm-project/llvm/lib/Support/Unix/Path.inc	Sun May 10 14:56:25 2020	(r360875)
+++ stable/11/contrib/llvm-project/llvm/lib/Support/Unix/Path.inc	Sun May 10 14:59:01 2020	(r360876)
@@ -208,14 +208,9 @@ std::string getMainExecutable(const char *argv0, void 
   while (*p++ != 0)
     ;
   // Iterate through auxiliary vectors for AT_EXECPATH.
-  for (;;) {
-    switch (*(uintptr_t *)p++) {
-    case AT_EXECPATH:
+  for (; *(uintptr_t *)p != AT_NULL; p++) {
+    if (*(uintptr_t *)p++ == AT_EXECPATH)
       return *p;
-    case AT_NULL:
-      break;
-    }
-    p++;
   }
 #endif
   // Fall back to argv[0] if auxiliary vectors are not available.