src/share/vm/prims/jvm.cpp

*** 2866,2876 ****
  
  ATTRIBUTE_PRINTF(3, 0)
  int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
    // see bug 4399518, 4417214
    if ((intptr_t)count <= 0) return -1;
!   return vsnprintf(str, count, fmt, args);
  }
  
  ATTRIBUTE_PRINTF(3, 0)
  int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
    va_list args;
--- 2866,2887 ----
  
  ATTRIBUTE_PRINTF(3, 0)
  int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
    // see bug 4399518, 4417214
    if ((intptr_t)count <= 0) return -1;
! 
!   int result = vsnprintf(str, count, fmt, args);
!   // Note: on truncation vsnprintf(3) on Unix returns numbers of
!   // characters which would have been written had the buffer been large
!   // enough; on Windows, it returns -1. We handle both cases here and
!   // always return -1, and perform null termination.
!   if ((result > 0 && (size_t)result >= count) || result == -1) {
!     str[count - 1] = '\0';
!     result = -1;
!   }
! 
!   return result;
  }
  
  ATTRIBUTE_PRINTF(3, 0)
  int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
    va_list args;