8216559: [JFR] Native libraries not correctly parsed from /proc/self/maps

Use %7s for the dev scan format as major:minor may be up to that length

Reviewed-by: mgronlun, jwilhelm

src/hotspot/os/linux/os_linux.cpp

@@ -1884,7 +1884,7 @@ int os::get_loaded_modules_info(os::LoadedModulesCallbackFunc callback, void *pa
       char name[PATH_MAX + 1];
 
       // Parse fields from line
-      sscanf(line, UINT64_FORMAT_X "-" UINT64_FORMAT_X " %4s " UINT64_FORMAT_X " %5s " INT64_FORMAT " %s",
+      sscanf(line, UINT64_FORMAT_X "-" UINT64_FORMAT_X " %4s " UINT64_FORMAT_X " %7s " INT64_FORMAT " %s",
              &base, &top, permissions, &offset, device, &inode, name);
 
       // Filter by device id '00:00' so that we only get file system mapped files.

test/jdk/jdk/jfr/event/runtime/TestNativeLibrariesEvent.java

@@ -39,6 +39,7 @@ import jdk.test.lib.jfr.Events;
 
 /**
  * @test
+ * @bug 8216559
  * @key jfr
  * @requires vm.hasJFR
  * @library /test/lib