* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
+ * Copyright (c) 1999-2017 The strace developers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
*/
#include "defs.h"
-#ifdef HAVE_LIBAIO_H
-# include <libaio.h>
-#endif
-
-/* Not defined in libaio.h */
-#ifndef IOCB_RESFD
-# define IOCB_RESFD (1 << 0)
-#endif
+#include "print_fields.h"
+#include <linux/aio_abi.h>
-int
-sys_io_setup(struct tcb *tcp)
+SYS_FUNC(io_setup)
{
if (entering(tcp))
- tprintf("%ld, ", tcp->u_arg[0]);
- else {
- if (syserror(tcp))
- tprintf("0x%0lx", tcp->u_arg[1]);
- else {
- unsigned long user_id;
- if (umove(tcp, tcp->u_arg[1], &user_id) == 0)
- tprintf("{%lu}", user_id);
- else
- tprints("{...}");
- }
- }
+ tprintf("%u, ", (unsigned int) tcp->u_arg[0]);
+ else
+ printnum_ptr(tcp, tcp->u_arg[1]);
return 0;
}
-int
-sys_io_destroy(struct tcb *tcp)
+SYS_FUNC(io_destroy)
{
- if (entering(tcp))
- tprintf("%lu", tcp->u_arg[0]);
- return 0;
-}
+ printaddr(tcp->u_arg[0]);
-#ifdef HAVE_LIBAIO_H
+ return RVAL_DECODED;
+}
enum iocb_sub {
- SUB_NONE, SUB_COMMON, SUB_POLL, SUB_VECTOR
+ SUB_NONE, SUB_COMMON, SUB_VECTOR
};
static enum iocb_sub
-tprint_lio_opcode(unsigned cmd)
+tprint_lio_opcode(unsigned int cmd)
{
static const struct {
const char *name;
enum iocb_sub sub;
} cmds[] = {
- { "pread", SUB_COMMON },
- { "pwrite", SUB_COMMON },
- { "fsync", SUB_NONE },
- { "fdsync", SUB_NONE },
- { "op4", SUB_NONE },
- { "poll", SUB_POLL },
- { "noop", SUB_NONE },
- { "preadv", SUB_VECTOR },
- { "pwritev", SUB_VECTOR },
+ { "IOCB_CMD_PREAD", SUB_COMMON },
+ { "IOCB_CMD_PWRITE", SUB_COMMON },
+ { "IOCB_CMD_FSYNC", SUB_NONE },
+ { "IOCB_CMD_FDSYNC", SUB_NONE },
+ { "IOCB_CMD_PREADX", SUB_NONE },
+ { "IOCB_CMD_POLL", SUB_NONE },
+ { "IOCB_CMD_NOOP", SUB_NONE },
+ { "IOCB_CMD_PREADV", SUB_VECTOR },
+ { "IOCB_CMD_PWRITEV", SUB_VECTOR },
};
if (cmd < ARRAY_SIZE(cmds)) {
tprints(cmds[cmd].name);
return cmds[cmd].sub;
}
- tprintf("%u /* SUB_??? */", cmd);
+ tprintf("%u", cmd);
+ tprints_comment("IOCB_CMD_???");
return SUB_NONE;
}
static void
-print_common_flags(struct iocb *iocb)
+print_common_flags(struct tcb *tcp, const struct iocb *cb)
{
-#if HAVE_STRUCT_IOCB_U_C_FLAGS
- if (iocb->u.c.flags & IOCB_RESFD)
- tprintf(", resfd=%d", iocb->u.c.resfd);
- if (iocb->u.c.flags & ~IOCB_RESFD)
- tprintf(", flags=%x", iocb->u.c.flags);
-#else
-# warning "libaio.h is too old => limited io_submit decoding"
+/* IOCB_FLAG_RESFD is available since v2.6.22-rc1~47 */
+#ifdef IOCB_FLAG_RESFD
+ if (cb->aio_flags & IOCB_FLAG_RESFD)
+ PRINT_FIELD_FD(", ", *cb, aio_resfd, tcp);
+
+ if (cb->aio_flags & ~IOCB_FLAG_RESFD)
+ PRINT_FIELD_X(", ", *cb, aio_flags);
#endif
}
-#endif /* HAVE_LIBAIO_H */
+static bool
+iocb_is_valid(const struct iocb *cb)
+{
+ return cb->aio_buf == (unsigned long) cb->aio_buf &&
+ cb->aio_nbytes == (size_t) cb->aio_nbytes &&
+ (ssize_t) cb->aio_nbytes >= 0;
+}
-int
-sys_io_submit(struct tcb *tcp)
+static enum iocb_sub
+print_iocb_header(struct tcb *tcp, const struct iocb *cb)
{
- if (entering(tcp)) {
-#ifdef HAVE_LIBAIO_H
- long nr = tcp->u_arg[1];
- /* if nr <= 0, we end up printing just "{}" */
- tprintf("%lu, %ld, {", tcp->u_arg[0], tcp->u_arg[1]);
- {
- long i;
- struct iocb **iocbs = (void *)tcp->u_arg[2];
-//FIXME: decoding of 32-bit call by 64-bit strace
-
- for (i = 0; i < nr; i++, iocbs++) {
- enum iocb_sub sub;
- struct iocb *iocbp;
- struct iocb iocb;
- if (i)
- tprints(", ");
-
- if (umove(tcp, (unsigned long)iocbs, &iocbp)) {
- tprintf("%#lx", (unsigned long)iocbs);
- /* No point in trying to read iocbs+1 etc */
- /* (nr can be ridiculously large): */
- break;
- }
- if (umove(tcp, (unsigned long)iocbp, &iocb)) {
- tprintf("{%#lx}", (unsigned long)iocbp);
- continue;
- }
- tprints("{");
- if (iocb.data)
- tprintf("data:%p, ", iocb.data);
- if (iocb.key)
- tprintf("key:%u, ", iocb.key);
- sub = tprint_lio_opcode(iocb.aio_lio_opcode);
- if (iocb.aio_reqprio)
- tprintf(", reqprio:%d", iocb.aio_reqprio);
- tprintf(", filedes:%d", iocb.aio_fildes);
- switch (sub) {
- case SUB_COMMON:
-#if HAVE_DECL_IO_CMD_PWRITE
- if (iocb.aio_lio_opcode == IO_CMD_PWRITE) {
- tprints(", str:");
- printstr(tcp, (unsigned long)iocb.u.c.buf,
- iocb.u.c.nbytes);
- } else
-#endif
- tprintf(", buf:%p", iocb.u.c.buf);
- tprintf(", nbytes:%lu, offset:%lld",
- iocb.u.c.nbytes,
- iocb.u.c.offset);
- print_common_flags(&iocb);
- break;
- case SUB_VECTOR:
- tprintf(", %lld", iocb.u.v.offset);
- print_common_flags(&iocb);
- tprints(", ");
- tprint_iov(tcp, iocb.u.v.nr,
- (unsigned long)iocb.u.v.vec,
-#if HAVE_DECL_IO_CMD_PWRITEV
- iocb.aio_lio_opcode == IO_CMD_PWRITEV
-#else
- 0
-#endif
- );
- break;
- case SUB_POLL:
- tprintf(", %x", iocb.u.poll.events);
- break;
- case SUB_NONE:
- break;
- }
- tprints("}");
- }
+ enum iocb_sub sub;
+
+ if (cb->aio_data){
+ PRINT_FIELD_X("", *cb, aio_data);
+ tprints(", ");
+ }
+
+ if (cb->aio_key) {
+ PRINT_FIELD_U("", *cb, aio_key);
+ tprints(", ");
+ }
+
+ tprints("aio_lio_opcode=");
+ sub = tprint_lio_opcode(cb->aio_lio_opcode);
+ if (cb->aio_reqprio)
+ PRINT_FIELD_D(", ", *cb, aio_reqprio);
+
+ PRINT_FIELD_FD(", ", *cb, aio_fildes, tcp);
+
+ return sub;
+}
+
+static void
+print_iocb(struct tcb *tcp, const struct iocb *cb)
+{
+ enum iocb_sub sub = print_iocb_header(tcp, cb);
+
+ switch (sub) {
+ case SUB_COMMON:
+ if (cb->aio_lio_opcode == 1 && iocb_is_valid(cb)) {
+ PRINT_FIELD_STRN(", ", *cb, aio_buf,
+ cb->aio_nbytes, tcp);
+ } else {
+ PRINT_FIELD_X(", ", *cb, aio_buf);
}
- tprints("}");
-#else
-# warning "libaio.h is not available => no io_submit decoding"
- tprintf("%lu, %ld, %#lx", tcp->u_arg[0], tcp->u_arg[1], tcp->u_arg[2]);
-#endif
+ PRINT_FIELD_U(", ", *cb, aio_nbytes);
+ PRINT_FIELD_D(", ", *cb, aio_offset);
+ print_common_flags(tcp, cb);
+ break;
+ case SUB_VECTOR:
+ if (iocb_is_valid(cb)) {
+ tprints(", aio_buf=");
+ tprint_iov(tcp, cb->aio_nbytes, cb->aio_buf,
+ cb->aio_lio_opcode == 8
+ ? IOV_DECODE_STR
+ : IOV_DECODE_ADDR);
+ } else {
+ PRINT_FIELD_X(", ", *cb, aio_buf);
+ PRINT_FIELD_U(", ", *cb, aio_nbytes);
+ }
+ PRINT_FIELD_D(", ", *cb, aio_offset);
+ print_common_flags(tcp, cb);
+ break;
+ case SUB_NONE:
+ break;
}
- return 0;
}
-int
-sys_io_cancel(struct tcb *tcp)
+static bool
+print_iocbp(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
{
- if (entering(tcp)) {
-#ifdef HAVE_LIBAIO_H
- struct iocb iocb;
-#endif
- tprintf("%lu, ", tcp->u_arg[0]);
-#ifdef HAVE_LIBAIO_H
- if (umove(tcp, tcp->u_arg[1], &iocb) == 0) {
- tprintf("{%p, %u, %u, %u, %d}, ",
- iocb.data, iocb.key,
- (unsigned)iocb.aio_lio_opcode,
- (unsigned)iocb.aio_reqprio, iocb.aio_fildes);
- } else
-#endif
- tprints("{...}, ");
+ kernel_ulong_t addr;
+ struct iocb cb;
+
+ if (elem_size < sizeof(kernel_ulong_t)) {
+ addr = *(unsigned int *) elem_buf;
} else {
- if (tcp->u_rval < 0)
- tprints("{...}");
- else {
-#ifdef HAVE_LIBAIO_H
- struct io_event event;
- if (umove(tcp, tcp->u_arg[2], &event) == 0)
- tprintf("{%p, %p, %ld, %ld}",
- event.data, event.obj,
- event.res, event.res2);
- else
-#endif
- tprints("{...}");
+ addr = *(kernel_ulong_t *) elem_buf;
+ }
+
+ tprints("{");
+ if (!umove_or_printaddr(tcp, addr, &cb))
+ print_iocb(tcp, &cb);
+ tprints("}");
+
+ return true;
+}
+
+SYS_FUNC(io_submit)
+{
+ const kernel_long_t nr =
+ truncate_klong_to_current_wordsize(tcp->u_arg[1]);
+ const kernel_ulong_t addr = tcp->u_arg[2];
+ kernel_ulong_t iocbp;
+
+ printaddr(tcp->u_arg[0]);
+ tprintf(", %" PRI_kld ", ", nr);
+
+ if (nr < 0)
+ printaddr(addr);
+ else
+ print_array(tcp, addr, nr, &iocbp, current_wordsize,
+ umoven_or_printaddr, print_iocbp, 0);
+
+ return RVAL_DECODED;
+}
+
+static bool
+print_io_event(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
+{
+ struct io_event *event = elem_buf;
+
+ PRINT_FIELD_X("{", *event, data);
+ PRINT_FIELD_X(", ", *event, obj);
+ PRINT_FIELD_D(", ", *event, res);
+ PRINT_FIELD_D(", ", *event, res2);
+ tprints("}");
+
+ return true;
+}
+
+SYS_FUNC(io_cancel)
+{
+ if (entering(tcp)) {
+ printaddr(tcp->u_arg[0]);
+ tprints(", ");
+
+ struct iocb cb;
+
+ if (!umove_or_printaddr(tcp, tcp->u_arg[1], &cb)) {
+ tprints("{");
+ print_iocb_header(tcp, &cb);
+ tprints("}");
}
+ tprints(", ");
+ } else {
+ struct io_event event;
+
+ if (!umove_or_printaddr(tcp, tcp->u_arg[2], &event))
+ print_io_event(tcp, &event, sizeof(event), 0);
}
return 0;
}
-int
-sys_io_getevents(struct tcb *tcp)
+SYS_FUNC(io_getevents)
{
if (entering(tcp)) {
- tprintf("%ld, %ld, %ld, ", tcp->u_arg[0], tcp->u_arg[1],
- tcp->u_arg[2]);
+ printaddr(tcp->u_arg[0]);
+ tprintf(", %" PRI_kld ", %" PRI_kld ", ",
+ truncate_klong_to_current_wordsize(tcp->u_arg[1]),
+ truncate_klong_to_current_wordsize(tcp->u_arg[2]));
} else {
- if (tcp->u_rval == 0) {
- tprints("{}");
- } else {
-#ifdef HAVE_LIBAIO_H
- struct io_event *events = (void *)tcp->u_arg[3];
- long i, nr = tcp->u_rval;
-
- for (i = 0; i < nr; i++, events++) {
- struct io_event event;
-
- if (i == 0)
- tprints("{");
- else
- tprints(", ");
-
- if (umove(tcp, (unsigned long)events, &event) != 0) {
- tprints("{...}");
- continue;
- }
- tprintf("{%p, %p, %ld, %ld}", event.data,
- event.obj, event.res, event.res2);
- }
- tprints("}, ");
-#else
- tprints("{...}");
-#endif
- }
-
+ struct io_event buf;
+ print_array(tcp, tcp->u_arg[3], tcp->u_rval, &buf, sizeof(buf),
+ umoven_or_printaddr, print_io_event, 0);
+ tprints(", ");
+ /*
+ * Since the timeout parameter is read by the kernel
+ * on entering syscall, it has to be decoded the same way
+ * whether the syscall has failed or not.
+ */
+ temporarily_clear_syserror(tcp);
print_timespec(tcp, tcp->u_arg[4]);
+ restore_cleared_syserror(tcp);
}
return 0;
}
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