]> granicus.if.org Git - strace/blobdiff - io.c
Do not use off_t in sendfile decoding
[strace] / io.c
diff --git a/io.c b/io.c
index 5896634e13241f05b7e773f7574d3891c83eedd2..b7bf8327a5a32bef7d27a207235919a84259797a 100644 (file)
--- a/io.c
+++ b/io.c
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *     $Id$
  */
 
 #include "defs.h"
-
 #include <fcntl.h>
 #if HAVE_SYS_UIO_H
-#include <sys/uio.h>
-#endif
-
-#ifdef HAVE_LONG_LONG_OFF_T
-/*
- * Hacks for systems that have a long long off_t
- */
-
-#define sys_pread64    sys_pread
-#define sys_pwrite64   sys_pwrite
+# include <sys/uio.h>
 #endif
 
 int
-sys_read(tcp)
-struct tcb *tcp;
+sys_read(struct tcb *tcp)
 {
        if (entering(tcp)) {
-               tprintf("%ld, ", tcp->u_arg[0]);
+               printfd(tcp, tcp->u_arg[0]);
+               tprints(", ");
        } else {
                if (syserror(tcp))
                        tprintf("%#lx", tcp->u_arg[1]);
@@ -63,11 +51,11 @@ struct tcb *tcp;
 }
 
 int
-sys_write(tcp)
-struct tcb *tcp;
+sys_write(struct tcb *tcp)
 {
        if (entering(tcp)) {
-               tprintf("%ld, ", tcp->u_arg[0]);
+               printfd(tcp, tcp->u_arg[0]);
+               tprints(", ");
                printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
                tprintf(", %lu", tcp->u_arg[2]);
        }
@@ -75,26 +63,24 @@ struct tcb *tcp;
 }
 
 #if HAVE_SYS_UIO_H
+/*
+ * data_size limits the cumulative size of printed data.
+ * Example: recvmsg returing a short read.
+ */
 void
-tprint_iov(tcp, len, addr)
-struct tcb * tcp;
-unsigned long len;
-unsigned long addr;
+tprint_iov_upto(struct tcb *tcp, unsigned long len, unsigned long addr, int decode_iov, unsigned long data_size)
 {
-#if defined(LINUX) && SUPPORTED_PERSONALITIES > 1
+#if SUPPORTED_PERSONALITIES > 1
        union {
                struct { u_int32_t base; u_int32_t len; } iov32;
                struct { u_int64_t base; u_int64_t len; } iov64;
        } iov;
 #define sizeof_iov \
-  (personality_wordsize[current_personality] == 4 \
-   ? sizeof(iov.iov32) : sizeof(iov.iov64))
+       (current_wordsize == 4 ? sizeof(iov.iov32) : sizeof(iov.iov64))
 #define iov_iov_base \
-  (personality_wordsize[current_personality] == 4 \
-   ? (u_int64_t) iov.iov32.base : iov.iov64.base)
+       (current_wordsize == 4 ? (uint64_t) iov.iov32.base : iov.iov64.base)
 #define iov_iov_len \
-  (personality_wordsize[current_personality] == 4 \
-   ? (u_int64_t) iov.iov32.len : iov.iov64.len)
+       (current_wordsize == 4 ? (uint64_t) iov.iov32.len : iov.iov64.len)
 #else
        struct iovec iov;
 #define sizeof_iov sizeof(iov)
@@ -105,7 +91,7 @@ unsigned long addr;
        int failed = 0;
 
        if (!len) {
-               tprintf("[]");
+               tprints("[]");
                return;
        }
        size = len * sizeof_iov;
@@ -121,24 +107,31 @@ unsigned long addr;
        } else {
                abbrev_end = end;
        }
-       tprintf("[");
+       tprints("[");
        for (cur = addr; cur < end; cur += sizeof_iov) {
                if (cur > addr)
-                       tprintf(", ");
+                       tprints(", ");
                if (cur >= abbrev_end) {
-                       tprintf("...");
+                       tprints("...");
                        break;
                }
                if (umoven(tcp, cur, sizeof_iov, (char *) &iov) < 0) {
-                       tprintf("?");
+                       tprints("?");
                        failed = 1;
                        break;
                }
-               tprintf("{");
-               printstr(tcp, (long) iov_iov_base, iov_iov_len);
+               tprints("{");
+               if (decode_iov) {
+                       unsigned long len = iov_iov_len;
+                       if (len > data_size)
+                               len = data_size;
+                       data_size -= len;
+                       printstr(tcp, (long) iov_iov_base, len);
+               } else
+                       tprintf("%#lx", (long) iov_iov_base);
                tprintf(", %lu}", (unsigned long)iov_iov_len);
        }
-       tprintf("]");
+       tprints("]");
        if (failed)
                tprintf(" %#lx", addr);
 #undef sizeof_iov
@@ -146,252 +139,269 @@ unsigned long addr;
 #undef iov_iov_len
 }
 
+void
+tprint_iov(struct tcb *tcp, unsigned long len, unsigned long addr, int decode_iov)
+{
+       tprint_iov_upto(tcp, len, addr, decode_iov, (unsigned long) -1L);
+}
+
 int
-sys_readv(tcp)
-struct tcb *tcp;
+sys_readv(struct tcb *tcp)
 {
        if (entering(tcp)) {
-               tprintf("%ld, ", tcp->u_arg[0]);
+               printfd(tcp, tcp->u_arg[0]);
+               tprints(", ");
        } else {
                if (syserror(tcp)) {
                        tprintf("%#lx, %lu",
                                        tcp->u_arg[1], tcp->u_arg[2]);
                        return 0;
                }
-               tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1]);
+               tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
                tprintf(", %lu", tcp->u_arg[2]);
        }
        return 0;
 }
 
 int
-sys_writev(tcp)
-struct tcb *tcp;
+sys_writev(struct tcb *tcp)
 {
        if (entering(tcp)) {
-               tprintf("%ld, ", tcp->u_arg[0]);
-               tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1]);
+               printfd(tcp, tcp->u_arg[0]);
+               tprints(", ");
+               tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
                tprintf(", %lu", tcp->u_arg[2]);
        }
        return 0;
 }
 #endif
 
-#if defined(SVR4)
+/* The SH4 ABI does allow long longs in odd-numbered registers, but
+   does not allow them to be split between registers and memory - and
+   there are only four argument registers for normal functions.  As a
+   result pread takes an extra padding argument before the offset.  This
+   was changed late in the 2.4 series (around 2.4.20).  */
+#if defined(SH)
+#define PREAD_OFFSET_ARG 4
+#else
+#define PREAD_OFFSET_ARG 3
+#endif
 
 int
-sys_pread(tcp)
-struct tcb *tcp;
+sys_pread(struct tcb *tcp)
 {
        if (entering(tcp)) {
-               tprintf("%ld, ", tcp->u_arg[0]);
+               printfd(tcp, tcp->u_arg[0]);
+               tprints(", ");
        } else {
                if (syserror(tcp))
                        tprintf("%#lx", tcp->u_arg[1]);
                else
                        printstr(tcp, tcp->u_arg[1], tcp->u_rval);
-#if UNIXWARE
-               /* off_t is signed int */
-               tprintf(", %lu, %ld", tcp->u_arg[2], tcp->u_arg[3]);
-#else
-               tprintf(", %lu, %llu", tcp->u_arg[2],
-                       LONG_LONG(tcp->u_arg[3], tcp->u_arg[4]));
-#endif
+               tprintf(", %lu, ", tcp->u_arg[2]);
+               printllval(tcp, "%llu", PREAD_OFFSET_ARG);
        }
        return 0;
 }
 
 int
-sys_pwrite(tcp)
-struct tcb *tcp;
+sys_pwrite(struct tcb *tcp)
 {
        if (entering(tcp)) {
-               tprintf("%ld, ", tcp->u_arg[0]);
+               printfd(tcp, tcp->u_arg[0]);
+               tprints(", ");
                printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
-#if UNIXWARE
-               /* off_t is signed int */
-               tprintf(", %lu, %ld", tcp->u_arg[2], tcp->u_arg[3]);
-#else
-               tprintf(", %lu, %llu", tcp->u_arg[2],
-                       LONG_LONG(tcp->u_arg[3], tcp->u_arg[4]));
-#endif
+               tprintf(", %lu, ", tcp->u_arg[2]);
+               printllval(tcp, "%llu", PREAD_OFFSET_ARG);
        }
        return 0;
 }
-#endif /* SVR4 */
-
-#ifdef FREEBSD
-#include <sys/types.h>
-#include <sys/socket.h>
 
+#if HAVE_SYS_UIO_H
 int
-sys_sendfile(tcp)
-struct tcb *tcp;
+sys_preadv(struct tcb *tcp)
 {
        if (entering(tcp)) {
-               tprintf("%ld, %ld, %llu, %lu", tcp->u_arg[0], tcp->u_arg[1],
-                       LONG_LONG(tcp->u_arg[2], tcp->u_arg[3]),
-                       tcp->u_arg[4]);
+               printfd(tcp, tcp->u_arg[0]);
+               tprints(", ");
        } else {
-               off_t offset;
-
-               if (!tcp->u_arg[5])
-                       tprintf(", NULL");
-               else {
-                       struct sf_hdtr hdtr;
-
-                       if (umove(tcp, tcp->u_arg[5], &hdtr) < 0)
-                               tprintf(", %#lx", tcp->u_arg[5]);
-                       else {
-                               tprintf(", { ");
-                               tprint_iov(tcp, hdtr.hdr_cnt, hdtr.headers);
-                               tprintf(", %u, ", hdtr.hdr_cnt);
-                               tprint_iov(tcp, hdtr.trl_cnt, hdtr.trailers);
-                               tprintf(", %u }", hdtr.hdr_cnt);
-                       }
+               if (syserror(tcp)) {
+                       tprintf("%#lx, %lu", tcp->u_arg[1], tcp->u_arg[2]);
+                       return 0;
                }
-               if (!tcp->u_arg[6])
-                       tprintf(", NULL");
-               else if (umove(tcp, tcp->u_arg[6], &offset) < 0)
-                       tprintf(", %#lx", tcp->u_arg[6]);
-               else
-                       tprintf(", [%llu]", offset);
-               tprintf(", %lu", tcp->u_arg[7]);
+               tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
+               tprintf(", %lu, ", tcp->u_arg[2]);
+               printllval(tcp, "%llu", PREAD_OFFSET_ARG);
        }
        return 0;
 }
-#endif /* FREEBSD */
-
-#ifdef LINUX
-
-/* The SH4 ABI does allow long longs in odd-numbered registers, but
-   does not allow them to be split between registers and memory - and
-   there are only four argument registers for normal functions.  As a
-   result pread takes an extra padding argument before the offset.  This
-   was changed late in the 2.4 series (around 2.4.20).  */
-#if defined(SH)
-#define PREAD_OFFSET_ARG 4
-#else
-#define PREAD_OFFSET_ARG 3
-#endif
 
 int
-sys_pread(tcp)
-struct tcb *tcp;
+sys_pwritev(struct tcb *tcp)
 {
        if (entering(tcp)) {
-               tprintf("%ld, ", tcp->u_arg[0]);
-       } else {
-               if (syserror(tcp))
-                       tprintf("%#lx", tcp->u_arg[1]);
-               else
-                       printstr(tcp, tcp->u_arg[1], tcp->u_rval);
-               ALIGN64 (tcp, PREAD_OFFSET_ARG); /* PowerPC alignment restriction */
-               tprintf(", %lu, %llu", tcp->u_arg[2],
-                       *(unsigned long long *)&tcp->u_arg[PREAD_OFFSET_ARG]);
+               printfd(tcp, tcp->u_arg[0]);
+               tprints(", ");
+               tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
+               tprintf(", %lu, ", tcp->u_arg[2]);
+               printllval(tcp, "%llu", PREAD_OFFSET_ARG);
        }
        return 0;
 }
+#endif /* HAVE_SYS_UIO_H */
+
+static void
+print_off_t(struct tcb *tcp, long addr)
+{
+       unsigned long offset;
+
+       if (!addr) {
+               tprints("NULL");
+               return;
+       }
+
+#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
+       if (current_wordsize == 4) {
+               uint32_t off;
+
+               if (umove(tcp, addr, &off) < 0)
+                       tprintf("%#lx", addr);
+               else
+                       tprintf("[%u]", off);
+       } else
+#endif
+       if (umove(tcp, addr, &offset) < 0)
+               tprintf("%#lx", addr);
+       else
+               tprintf("[%lu]", offset);
+}
 
 int
-sys_pwrite(tcp)
-struct tcb *tcp;
+sys_sendfile(struct tcb *tcp)
 {
        if (entering(tcp)) {
-               tprintf("%ld, ", tcp->u_arg[0]);
-               printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
-               ALIGN64 (tcp, PREAD_OFFSET_ARG); /* PowerPC alignment restriction */
-               tprintf(", %lu, %llu", tcp->u_arg[2],
-                       *(unsigned long long *)&tcp->u_arg[PREAD_OFFSET_ARG]);
+               printfd(tcp, tcp->u_arg[0]);
+               tprints(", ");
+               printfd(tcp, tcp->u_arg[1]);
+               tprints(", ");
+               print_off_t(tcp, tcp->u_arg[2]);
+               tprintf(", %lu", tcp->u_arg[3]);
        }
        return 0;
 }
 
+void
+print_loff_t(struct tcb *tcp, long addr)
+{
+       loff_t offset;
+
+       if (!addr)
+               tprints("NULL");
+       else if (umove(tcp, addr, &offset) < 0)
+               tprintf("%#lx", addr);
+       else
+               tprintf("[%llu]", (unsigned long long int) offset);
+}
+
 int
-sys_sendfile(tcp)
-struct tcb *tcp;
+sys_sendfile64(struct tcb *tcp)
 {
        if (entering(tcp)) {
-               off_t offset;
-
-               tprintf("%ld, %ld, ", tcp->u_arg[0], tcp->u_arg[1]);
-               if (!tcp->u_arg[2])
-                       tprintf("NULL");
-               else if (umove(tcp, tcp->u_arg[2], &offset) < 0)
-                       tprintf("%#lx", tcp->u_arg[2]);
-               else
-                       tprintf("[%lu]", offset);
+               printfd(tcp, tcp->u_arg[0]);
+               tprints(", ");
+               printfd(tcp, tcp->u_arg[1]);
+               tprints(", ");
+               print_loff_t(tcp, tcp->u_arg[2]);
                tprintf(", %lu", tcp->u_arg[3]);
        }
        return 0;
 }
 
+static const struct xlat splice_flags[] = {
+#ifdef SPLICE_F_MOVE
+       { SPLICE_F_MOVE,     "SPLICE_F_MOVE"     },
+#endif
+#ifdef SPLICE_F_NONBLOCK
+       { SPLICE_F_NONBLOCK, "SPLICE_F_NONBLOCK" },
+#endif
+#ifdef SPLICE_F_MORE
+       { SPLICE_F_MORE,     "SPLICE_F_MORE"     },
+#endif
+#ifdef SPLICE_F_GIFT
+       { SPLICE_F_GIFT,     "SPLICE_F_GIFT"     },
+#endif
+       { 0,                 NULL                },
+};
+
 int
-sys_sendfile64(tcp)
-struct tcb *tcp;
+sys_tee(struct tcb *tcp)
 {
        if (entering(tcp)) {
-               loff_t offset;
-
-               tprintf("%ld, %ld, ", tcp->u_arg[0], tcp->u_arg[1]);
-               if (!tcp->u_arg[2])
-                       tprintf("NULL");
-               else if (umove(tcp, tcp->u_arg[2], &offset) < 0)
-                       tprintf("%#lx", tcp->u_arg[2]);
-               else
-                       tprintf("[%llu]", (unsigned long long int) offset);
-               tprintf(", %lu", tcp->u_arg[3]);
+               /* int fd_in */
+               printfd(tcp, tcp->u_arg[0]);
+               tprints(", ");
+               /* int fd_out */
+               printfd(tcp, tcp->u_arg[1]);
+               tprints(", ");
+               /* size_t len */
+               tprintf("%lu, ", tcp->u_arg[2]);
+               /* unsigned int flags */
+               printflags(splice_flags, tcp->u_arg[3], "SPLICE_F_???");
        }
        return 0;
 }
 
-#endif /* LINUX */
-
-#if _LFS64_LARGEFILE || HAVE_LONG_LONG_OFF_T
 int
-sys_pread64(tcp)
-struct tcb *tcp;
+sys_splice(struct tcb *tcp)
 {
        if (entering(tcp)) {
-               tprintf("%ld, ", tcp->u_arg[0]);
-       } else {
-               ALIGN64 (tcp, 3);
-               if (syserror(tcp))
-                       tprintf("%#lx", tcp->u_arg[1]);
-               else
-                       printstr(tcp, tcp->u_arg[1], tcp->u_rval);
-               tprintf(", %lu, %#llx", tcp->u_arg[2],
-                       LONG_LONG(tcp->u_arg[3], tcp->u_arg[4]));
+               /* int fd_in */
+               printfd(tcp, tcp->u_arg[0]);
+               tprints(", ");
+               /* loff_t *off_in */
+               print_loff_t(tcp, tcp->u_arg[1]);
+               tprints(", ");
+               /* int fd_out */
+               printfd(tcp, tcp->u_arg[2]);
+               tprints(", ");
+               /* loff_t *off_out */
+               print_loff_t(tcp, tcp->u_arg[3]);
+               tprints(", ");
+               /* size_t len */
+               tprintf("%lu, ", tcp->u_arg[4]);
+               /* unsigned int flags */
+               printflags(splice_flags, tcp->u_arg[5], "SPLICE_F_???");
        }
        return 0;
 }
 
 int
-sys_pwrite64(tcp)
-struct tcb *tcp;
+sys_vmsplice(struct tcb *tcp)
 {
        if (entering(tcp)) {
-               ALIGN64 (tcp, 3);
-               tprintf("%ld, ", tcp->u_arg[0]);
-               printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
-               tprintf(", %lu, %#llx", tcp->u_arg[2],
-                       LONG_LONG(tcp->u_arg[3], tcp->u_arg[4]));
+               /* int fd */
+               printfd(tcp, tcp->u_arg[0]);
+               tprints(", ");
+               /* const struct iovec *iov, unsigned long nr_segs */
+               tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
+               tprintf(", %lu, ", tcp->u_arg[2]);
+               /* unsigned int flags */
+               printflags(splice_flags, tcp->u_arg[3], "SPLICE_F_???");
        }
        return 0;
 }
-#endif
 
 int
-sys_ioctl(tcp)
-struct tcb *tcp;
+sys_ioctl(struct tcb *tcp)
 {
-       const struct ioctlent *iop;
+       const struct_ioctlent *iop;
 
        if (entering(tcp)) {
-               tprintf("%ld, ", tcp->u_arg[0]);
+               printfd(tcp, tcp->u_arg[0]);
+               tprints(", ");
                iop = ioctl_lookup(tcp->u_arg[1]);
                if (iop) {
-                       tprintf("%s", iop->symbol);
+                       tprints(iop->symbol);
                        while ((iop = ioctl_next_match(iop)))
                                tprintf(" or %s", iop->symbol);
                } else
@@ -399,8 +409,8 @@ struct tcb *tcp;
                ioctl_decode(tcp, tcp->u_arg[1], tcp->u_arg[2]);
        }
        else {
-               int ret;
-               if (!(ret = ioctl_decode(tcp, tcp->u_arg[1], tcp->u_arg[2])))
+               int ret = ioctl_decode(tcp, tcp->u_arg[1], tcp->u_arg[2]);
+               if (!ret)
                        tprintf(", %#lx", tcp->u_arg[2]);
                else
                        return ret - 1;