From 9188142698d8fdcee43c0b0519fde5c63b0010f8 Mon Sep 17 00:00:00 2001
From: Brian Burkhalter <bpb@openjdk.org>
Date: Tue, 6 Jun 2023 15:15:32 +0000
Subject: [PATCH] 8309216: Cast from jchar* to char* in test
 java/io/GetXSpace.java

Reviewed-by: rriggs, naoto
---
 test/jdk/java/io/File/libGetXSpace.c | 30 ++++++++++++++++++++++------
 1 file changed, 24 insertions(+), 6 deletions(-)

diff --git a/test/jdk/java/io/File/libGetXSpace.c b/test/jdk/java/io/File/libGetXSpace.c
index 5f7643ea747..7a6cdf0d1dc 100644
--- a/test/jdk/java/io/File/libGetXSpace.c
+++ b/test/jdk/java/io/File/libGetXSpace.c
@@ -60,8 +60,8 @@ Java_GetXSpace_getSpace0
 {
     jboolean totalSpaceIsEstimated = JNI_FALSE;
     jlong array[4];
-    const jchar* chars = (*env)->GetStringChars(env, root, NULL);
-    if (chars == NULL) {
+    const jchar* strchars = (*env)->GetStringChars(env, root, NULL);
+    if (strchars == NULL) {
         JNU_ThrowByNameWithLastError(env, "java/lang/RuntimeException",
                                      "GetStringChars");
         return JNI_FALSE;
@@ -77,12 +77,13 @@ Java_GetXSpace_getSpace0
         }
     }
 
-    LPCWSTR path = (LPCWSTR)chars;
+    LPCWSTR path = (LPCWSTR)strchars;
 
     if (pfnGetDiskSpaceInformation != NULL) {
         // use GetDiskSpaceInformationW
         DISK_SPACE_INFORMATION diskSpaceInfo;
         BOOL hres = pfnGetDiskSpaceInformation(path, &diskSpaceInfo);
+        (*env)->ReleaseStringChars(env, root, strchars);
         if (FAILED(hres)) {
             JNU_ThrowByNameWithLastError(env, "java/lang/RuntimeException",
                                          "GetDiskSpaceInformationW");
@@ -108,8 +109,10 @@ Java_GetXSpace_getSpace0
         ULARGE_INTEGER totalNumberOfBytes;
         ULARGE_INTEGER totalNumberOfFreeBytes;
 
-        if (GetDiskFreeSpaceExW(path, &freeBytesAvailable, &totalNumberOfBytes,
-            &totalNumberOfFreeBytes) == 0) {
+        BOOL hres = GetDiskFreeSpaceExW(path, &freeBytesAvailable,
+            &totalNumberOfBytes, &totalNumberOfFreeBytes);
+        (*env)->ReleaseStringChars(env, root, strchars);
+        if (FAILED(hres)) {
             JNU_ThrowByNameWithLastError(env, "java/lang/RuntimeException",
                                          "GetDiskFreeSpaceExW");
             return totalSpaceIsEstimated;
@@ -124,9 +127,24 @@ Java_GetXSpace_getSpace0
         array[3] = (jlong)freeBytesAvailable.QuadPart;
     }
 #else
+    int len = (int)(*env)->GetStringLength(env, root);
+    char* chars = (char*)malloc((len + 1)*sizeof(char));
+    if (chars == NULL) {
+        (*env)->ReleaseStringChars(env, root, strchars);
+        JNU_ThrowByNameWithLastError(env, "java/lang/RuntimeException",
+                                     "malloc");
+        return JNI_FALSE;
+    }
+
+    for (int i = 0; i < len; i++) {
+        chars[i] = (char)strchars[i];
+    }
+    chars[len] = '\0';
+    (*env)->ReleaseStringChars(env, root, strchars);
+
     struct statfs buf;
     int result = statfs((const char*)chars, &buf);
-    (*env)->ReleaseStringChars(env, root, chars);
+    free(chars);
     if (result < 0) {
         JNU_ThrowByNameWithLastError(env, "java/lang/RuntimeException",
                                      strerror(errno));