src/os/posix/vm/os_posix.cpp

rev 9644 : 8145096: Undefined behaviour in HotSpot
Summary: Fix some integer overflows
Reviewed-by: duke

*** 751,761 ****
    }
  
    strncpy(buffer, "none", size);
  
    const struct {
!     int i;
      const char* s;
    } flaginfo [] = {
      { SA_NOCLDSTOP, "SA_NOCLDSTOP" },
      { SA_ONSTACK,   "SA_ONSTACK"   },
      { SA_RESETHAND, "SA_RESETHAND" },
--- 751,765 ----
    }
  
    strncpy(buffer, "none", size);
  
    const struct {
!     // NB: i is an unsigned int here because SA_RESETHAND is on some
!     // systems 0x80000000, which is implicitly unsigned.  Assignining
!     // it to an int field would be an overflow in unsigned-to-signed
!     // conversion.
!     unsigned int i;
      const char* s;
    } flaginfo [] = {
      { SA_NOCLDSTOP, "SA_NOCLDSTOP" },
      { SA_ONSTACK,   "SA_ONSTACK"   },
      { SA_RESETHAND, "SA_RESETHAND" },