Created attachment 870709 [details]
Systemtap script to reproduce RDMA header compile bug

Description of problem:


Version-Release number of selected component (if applicable):
Fedora 19 and RHEL 

How reproducible:


Steps to Reproduce:
1. Install systemtap-devel, kernel-headers and kernel-debuginfo packages.
2. Create a systemtap script (attached) which references an rdma user structure.
3. Run the script with the following "verbose" flags.
  $ stap --vp 04 foo.stp

Actual results:

stap exits with an error. The output includes this message:

In file included from <command-line>:0:0:
include/uapi/rdma/rdma_user_cm.h:112:26: error: field ‘addr’ has incomplete type
  struct sockaddr_storage addr;
                          ^
Expected results:

stap starts without error. (use Ctrl-C to stop it.)

Additional info:

The error occurs because include/uapi/rdma/rdma_user_cm.h does not include linux/socket.h, which defines struct sockaddr_storage. The error is also present in RHEL 6.5 (RPM kernel-headers-2.6.32-431.3.1.el6.x86_64, file include/rdma/rdma_user_cm.h). The immediate problem can be fixed by adding the include.

The more general problem is this: No process verifies that include files (with some exceptions) compile by themselves (or equivalently, are included as the first non-whitespace in a file which compiles.) If there were such a process, it would have caught the bug.