src/java.base/windows/native/libjava/canonicalize_md.c

*** 223,232 ****
--- 223,234 ----
      jio_fprintf(stderr, "canonicalize: errval %d\n", errval);
  #endif
      return 1;
  }
  
+ int wcanonicalize(WCHAR *orig_path, WCHAR *result, int size);
+ 
  /* Convert a pathname to canonical form.  The input orig_path is assumed to
     have been converted to native form already, via JVM_NativePath().  This is
     necessary because _fullpath() rejects duplicate separator characters on
     Win95, though it accepts them on NT. */
  
*** 235,244 ****
--- 237,278 ----
  {
      WIN32_FIND_DATA fd;
      HANDLE h;
      char path[1024];    /* Working copy of path */
      char *src, *dst, *dend;
+     wchar_t *worig_path, *wresult;
+     size_t converted_chars = 0;
+ 
+     /* handle long path with length >= MAX_PATH */
+     if (strlen(orig_path) >= MAX_PATH) {
+         if ((worig_path = (WCHAR*)malloc(size * sizeof(WCHAR))) == NULL)
+             return -1;
+ 
+         if (mbstowcs_s(&converted_chars, worig_path, (size_t)size, orig_path, (size_t)(size - 1)) != 0) {
+             free(worig_path);
+             return -1;
+         }
+ 
+         if ((wresult = (WCHAR*)malloc(size * sizeof(WCHAR))) == NULL)
+             return -1;
+ 
+         if (wcanonicalize(worig_path, wresult, size) != 0) {
+             free(worig_path);
+             free(wresult);
+             return -1;
+         }
+ 
+         if (wcstombs_s(&converted_chars, result, (size_t)size, wresult, (size_t)(size - 1)) != 0) {
+             free(worig_path);
+             free(wresult);
+             return -1;
+         }
+ 
+         free(worig_path);
+         free(wresult);
+         return 0;
+     }
  
      /* Reject paths that contain wildcards */
      if (wild(orig_path)) {
          errno = EINVAL;
          return -1;
*** 246,256 ****
  
      /* Collapse instances of "foo\.." and ensure absoluteness.  Note that
         contrary to the documentation, the _fullpath procedure does not require
         the drive to be available.  It also does not reliably change all
         occurrences of '/' to '\\' on Win95, so now JVM_NativePath does that. */
!     if(!_fullpath(path, orig_path, sizeof(path))) {
          return -1;
      }
  
      /* Correction for Win95: _fullpath may leave a trailing "\\"
         on a UNC pathname */
--- 280,290 ----
  
      /* Collapse instances of "foo\.." and ensure absoluteness.  Note that
        contrary to the documentation, the _fullpath procedure does not require
        the drive to be available.  It also does not reliably change all
        occurrences of '/' to '\\' on Win95, so now JVM_NativePath does that. */
!     if (!_fullpath(path, orig_path, sizeof(path))) {
          return -1;
      }
  
      /* Correction for Win95: _fullpath may leave a trailing "\\"
        on a UNC pathname */
*** 585,595 ****
     dll, to avoid complicate solution such as including io_util_md.c into
     that package, as a workaround we put this method here.
   */
  
  /* copy \\?\ or \\?\UNC\ to the front of path*/
! WCHAR*
  getPrefixed(const WCHAR* path, int pathlen) {
      WCHAR* pathbuf = (WCHAR*)malloc((pathlen + 10) * sizeof (WCHAR));
      if (pathbuf != 0) {
          if (path[0] == L'\\' && path[1] == L'\\') {
              if (path[2] == L'?' && path[3] == L'\\'){
--- 619,629 ----
     dll, to avoid complicate solution such as including io_util_md.c into
     that package, as a workaround we put this method here.
   */
  
  /* copy \\?\ or \\?\UNC\ to the front of path*/
! __declspec(dllexport) WCHAR*
  getPrefixed(const WCHAR* path, int pathlen) {
      WCHAR* pathbuf = (WCHAR*)malloc((pathlen + 10) * sizeof (WCHAR));
      if (pathbuf != 0) {
          if (path[0] == L'\\' && path[1] == L'\\') {
              if (path[2] == L'?' && path[3] == L'\\'){