30a8f67295
We have noticed that, on RTEMS, a small number of testscases are failing because two calls to this method return the same filename. This happens for instance in 27_io/filesystem/operations/copy_file.cc where it does: auto from = __gnu_test::nonexistent_path(); auto to = __gnu_test::nonexistent_path(); We tracked this issue down to the fact that the implementation of mkstemp on that system appears to use a very predictable algorithm for chosing the name of the temporary file, where the same filename appears to be tried in the same order, regardless of past calls. So, as long as the file gets deleted after a call to mkstemp (something we do here in our nonexistent_path method), the next call to mkstemps ends up returning the same filename, causing the collision we se above. This commit enhances the __gnu_test::nonexistent_path method to introduce in the filename being returned a counter which gets incremented at every call of this method. Co-authored-by: Jonathan Wakely <jwakely@redhat.com> libstdc++-v3/ChangeLog: * testsuite/util/testsuite_fs.h (__gnu_test::nonexistent_path): Always include a counter in the filename returned. |
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