76cf3b2a98
This is a preparation for the future introduction of cross-NS PID derivation, which would enable us to print fd information for fds related to all processes, not just traced ones. Note the change in output type for idx1/idx2 in KCMP_FILE command from unsigned to int, it follows printfd output format. * kcmp.c (printpidfd): New function. (PRINT_FIELD_PIDFD): New macro. (SYS_FUNC(kcmp)) <case KCMP_FILE>: Use printpidfd for printing idx1/idx2, as they are fds, after all.
81 lines
2.6 KiB
C
81 lines
2.6 KiB
C
/*
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* Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
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* Copyright (c) 2015-2017 The strace developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "defs.h"
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#include "print_fields.h"
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#include "xlat/kcmp_types.h"
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static void
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printpidfd(struct tcb *tcp, pid_t pid, int fd)
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{
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/*
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* XXX We want to use printfd here, but we should figure out which
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* process in strace's PID NS is referred to first.
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*/
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tprintf("%d", fd);
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}
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#define PRINT_FIELD_PIDFD(prefix_, where_, field_, tcp_, pid_) \
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do { \
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STRACE_PRINTF("%s%s=", (prefix_), #field_); \
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printpidfd((tcp_), (pid_), (where_).field_); \
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} while (0)
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SYS_FUNC(kcmp)
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{
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pid_t pid1 = tcp->u_arg[0];
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pid_t pid2 = tcp->u_arg[1];
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int type = tcp->u_arg[2];
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kernel_ulong_t idx1 = tcp->u_arg[3];
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kernel_ulong_t idx2 = tcp->u_arg[4];
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tprintf("%d, %d, ", pid1, pid2);
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printxval(kcmp_types, type, "KCMP_???");
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switch (type) {
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case KCMP_FILE:
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tprints(", ");
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printpidfd(tcp, pid1, idx1);
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tprints(", ");
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printpidfd(tcp, pid1, idx2);
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break;
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case KCMP_FILES:
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case KCMP_FS:
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case KCMP_IO:
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case KCMP_SIGHAND:
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case KCMP_SYSVSEM:
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case KCMP_VM:
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break;
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default:
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tprintf(", %#" PRI_klx ", %#" PRI_klx, idx1, idx2);
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}
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return RVAL_DECODED;
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}
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