diff options
Diffstat (limited to 'hurd/intr-msg.c')
| -rw-r--r-- | hurd/intr-msg.c | 87 |
1 files changed, 86 insertions, 1 deletions
diff --git a/hurd/intr-msg.c b/hurd/intr-msg.c index a847cff..73bcc84 100644 --- a/hurd/intr-msg.c +++ b/hurd/intr-msg.c @@ -1,5 +1,5 @@ /* Replacement for mach_msg used in interruptible Hurd RPCs. - Copyright (C) 95, 96, 97, 98, 99 Free Software Foundation, Inc. + Copyright (C) 95,96,97,98,99,2000 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -143,6 +143,91 @@ _hurd_intr_rpc_mach_msg (mach_msg_header_t *msg, } /* FALLTHROUGH */ + /* These are the other codes that mean a pseudo-receive modified + the message buffer and we might need to clean up the port rights. */ + case MACH_SEND_TIMED_OUT: + case MACH_SEND_INVALID_NOTIFY: + case MACH_SEND_NO_NOTIFY: + case MACH_SEND_NOTIFY_IN_PROGRESS: + if (MACH_MSGH_BITS_REMOTE (msg->msgh_bits) == MACH_MSG_TYPE_MOVE_SEND) + { + __mach_port_deallocate (__mach_task_self (), msg->msgh_remote_port); + msg->msgh_bits + = (MACH_MSGH_BITS (MACH_MSG_TYPE_COPY_SEND, + MACH_MSGH_BITS_LOCAL (msg->msgh_bits)) + | MACH_MSGH_BITS_OTHER (msg->msgh_bits)); + } + if (msg->msgh_bits & MACH_MSGH_BITS_COMPLEX) + { + /* Check for MOVE_SEND rights in the message. These hold refs + that we need to release in case the message is in fact never + re-sent later. Since it might in fact be re-sent, we turn + these into COPY_SEND's after deallocating the extra user ref; + the caller is responsible for still holding a ref to go with + the original COPY_SEND right, so the resend copies it again. */ + + mach_msg_type_long_t *ty = (void *) (msg + 1); + while ((void *) ty < (void *) msg + msg->msgh_size) + { + mach_msg_type_name_t name; + mach_msg_type_size_t size; + mach_msg_type_number_t number; + + inline void clean_ports (mach_port_t *ports, int dealloc) + { + mach_msg_type_number_t i; + switch (name) + { + case MACH_MSG_TYPE_MOVE_SEND: + for (i = 0; i < number; i++) + __mach_port_deallocate (__mach_task_self (), *ports++); + (ty->msgtl_header.msgt_longform + ? ty->msgtl_name : ty->msgtl_header.msgt_name) + = MACH_MSG_TYPE_COPY_SEND; + break; + case MACH_MSG_TYPE_COPY_SEND: + case MACH_MSG_TYPE_MOVE_RECEIVE: + break; + default: + if (MACH_MSG_TYPE_PORT_ANY (name)) + assert (! "unexpected port type in interruptible RPC"); + } + if (dealloc) + __vm_deallocate (__mach_task_self (), + (vm_address_t) ports, + number * sizeof (mach_port_t)); + } + + if (ty->msgtl_header.msgt_longform) + { + name = ty->msgtl_name; + size = ty->msgtl_size; + number = ty->msgtl_number; + (char *) ty += sizeof (mach_msg_type_long_t); + } + else + { + name = ty->msgtl_header.msgt_name; + size = ty->msgtl_header.msgt_size; + number = ty->msgtl_header.msgt_number; + (char *) ty += sizeof (mach_msg_type_t); + } + + if (ty->msgtl_header.msgt_inline) + { + clean_ports ((void *) ty, 0); + /* calculate length of data in bytes, rounding up */ + (char *) ty += (((((number * size) + 7) >> 3) + + sizeof (mach_msg_type_t) - 1) + &~ (sizeof (mach_msg_type_t) - 1)); + } + else + clean_ports (*((void **) ty)++, + ty->msgtl_header.msgt_deallocate); + } + } + break; + case EINTR: /* Either the process was stopped and continued, or the server doesn't support interrupt_operation. */ |