Actually free Process fd_map entries when a file is closed...

amazingly we never did that before.  Caused us to run out of
file descriptors in twolf.

sim/process.cc:
    Add free_fd() method to free closed target fd in simulator fd map.
    Rename open_fd() to alloc_fd() for symmetry with free_fd().
sim/process.hh:
    Add free_fd() method to free closed target fd in simulator fd map.
    Rename open_fd() to alloc_fd() for symmetry with free_fd().
    Crank up MAX_FD while we're at it.
sim/syscall_emul.cc:
    Call free_fd() on process when target closes a file.
sim/syscall_emul.hh:
    Process open_fd() renamed to alloc_fd().

--HG--
extra : convert_revision : d780f4ccfd5a0989230b0afbdbd276212b87550c

1 files changed, 1 insertions, 1 deletions

diff --git a/sim/syscall_emul.hh b/sim/syscall_emul.hh
index 17889113e..f22b6dcb7 100644
--- a/sim/syscall_emul.hh
+++ b/sim/syscall_emul.hh
@@ -339,7 +339,7 @@ openFunc(SyscallDesc *desc, int callnum, Process *process,
     // open the file
     int fd = open(path.c_str(), hostFlags, mode);
 
-    return (fd == -1) ? -errno : process->open_fd(fd);
+    return (fd == -1) ? -errno : process->alloc_fd(fd);
 }