(fs) UnixFileAttributeViews setTimes() failing on armhf, Ubuntu noble

Origin: upstream, https://github.com/openjdk/jdk/pull/20208
Bug: https://bugs.openjdk.org/browse/JDK-8336529
Bug-Ubuntu: https://bugs.launchpad.net/ubuntu/+source/openjdk-23/+bug/2073335
Last-Update: 2024-07-17

time_t transition in Debian/Ubuntu left 32 bit time_t symbols in glibc.
Looking up 'futimens' via dlsym returns 32 bit version of the function.
This is causing failure to set last modified time
(e.g. instead of year 2017 we get 1976 in the test).
Using the function directly correctly calls 64 bit versions.
When we lookup functions with time_t arguments through dlsym()
calls we should use 64 bit versions.
Last-Update: 2024-07-17
Gbp-Pq: Name jdk-8336529-proposed.patch

diff --git a/src/java.base/unix/native/libnio/fs/UnixNativeDispatcher.c b/src/java.base/unix/native/libnio/fs/UnixNativeDispatcher.c
index 35ba74f34f6dd72fc58072a25ee10c03dd43753d..cacf1087770a12a6561feb06a06e9fcc5323ee7f 100644 (file)
--- a/src/java.base/unix/native/libnio/fs/UnixNativeDispatcher.c
+++ b/src/java.base/unix/native/libnio/fs/UnixNativeDispatcher.c
@@ -281,6 +281,20 @@ static int fstatat64_wrapper(int dfd, const char *path,
 }
 #endif
 
+/**
+ * Lookup time functions symbols, trying 64 bit version first
+ */
+static void* lookup_time_function(const char* symbol64, const char* symbol) {
+    void* ret = NULL;
+    if (sizeof(time_t) > 4) {
+        ret = dlsym(RTLD_DEFAULT, symbol64);
+    }
+    if (ret == NULL) {
+        ret = dlsym(RTLD_DEFAULT, symbol);
+    }
+    return ret;
+}
+
 #if defined(__linux__)
 static int statx_wrapper(int dirfd, const char *restrict pathname, int flags,
                          unsigned int mask, struct my_statx *restrict statxbuf) {
@@ -385,10 +399,13 @@ Java_sun_nio_fs_UnixNativeDispatcher_init(JNIEnv* env, jclass this)
     my_unlinkat_func = (unlinkat_func*) dlsym(RTLD_DEFAULT, "unlinkat");
     my_renameat_func = (renameat_func*) dlsym(RTLD_DEFAULT, "renameat");
 #ifndef _ALLBSD_SOURCE
-    my_futimesat_func = (futimesat_func*) dlsym(RTLD_DEFAULT, "futimesat");
-    my_lutimes_func = (lutimes_func*) dlsym(RTLD_DEFAULT, "lutimes");
+    my_futimesat_func = (futimesat_func*) lookup_time_function("__futimesat64",
+        "futimesat");
+    my_lutimes_func = (lutimes_func*) lookup_time_function("__lutimes64",
+        "lutimes");
 #endif
-    my_futimens_func = (futimens_func*) dlsym(RTLD_DEFAULT, "futimens");
+    my_futimens_func = (futimens_func*) lookup_time_function("__futimens64",
+        "futimens");
 #if defined(_AIX)
     my_fdopendir_func = (fdopendir_func*) dlsym(RTLD_DEFAULT, "fdopendir64");
 #else