]> granicus.if.org Git - strace/blobdiff - io.c
Filter out redundant ioctl entries early
[strace] / io.c
diff --git a/io.c b/io.c
index c3075aa8ac3162b18f50d3bf8147e426bd829918..7238a8fabb548c95e0c29b12cf71436c2afa19bc 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>
+# include <sys/uio.h>
 #endif
 
 int
@@ -66,23 +63,24 @@ sys_write(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(struct tcb *tcp, unsigned long len, unsigned long addr, int decode_iov)
+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)
@@ -123,9 +121,13 @@ tprint_iov(struct tcb *tcp, unsigned long len, unsigned long addr, int decode_io
                        break;
                }
                tprints("{");
-               if (decode_iov)
-                       printstr(tcp, (long) iov_iov_base, iov_iov_len);
-               else
+               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);
        }
@@ -137,6 +139,12 @@ tprint_iov(struct tcb *tcp, unsigned long len, unsigned long addr, int decode_io
 #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(struct tcb *tcp)
 {
@@ -168,128 +176,6 @@ sys_writev(struct tcb *tcp)
 }
 #endif
 
-#if defined(SVR4)
-
-int
-sys_pread(struct tcb *tcp)
-{
-       if (entering(tcp)) {
-               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
-       }
-       return 0;
-}
-
-int
-sys_pwrite(struct tcb *tcp)
-{
-       if (entering(tcp)) {
-               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
-       }
-       return 0;
-}
-
-#if _LFS64_LARGEFILE
-int
-sys_pread64(struct tcb *tcp)
-{
-       if (entering(tcp)) {
-               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);
-               tprintf(", %lu, ", tcp->u_arg[2]);
-               printllval(tcp, "%#llx", 3);
-       }
-       return 0;
-}
-
-int
-sys_pwrite64(struct tcb *tcp)
-{
-       if (entering(tcp)) {
-               printfd(tcp, tcp->u_arg[0]);
-               tprints(", ");
-               printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
-               tprintf(", %lu, ", tcp->u_arg[2]);
-               printllval(tcp, "%#llx", 3);
-       }
-       return 0;
-}
-#endif /* _LFS64_LARGEFILE */
-
-#endif /* SVR4 */
-
-#ifdef FREEBSD
-#include <sys/types.h>
-#include <sys/socket.h>
-
-int
-sys_sendfile(struct tcb *tcp)
-{
-       if (entering(tcp)) {
-               printfd(tcp, tcp->u_arg[0]);
-               tprints(", ");
-               printfd(tcp, tcp->u_arg[1]);
-               tprintf(", %llu, %lu",
-                       LONG_LONG(tcp->u_arg[2], tcp->u_arg[3]),
-                       tcp->u_arg[4]);
-       } else {
-               off_t offset;
-
-               if (!tcp->u_arg[5])
-                       tprints(", NULL");
-               else {
-                       struct sf_hdtr hdtr;
-
-                       if (umove(tcp, tcp->u_arg[5], &hdtr) < 0)
-                               tprintf(", %#lx", tcp->u_arg[5]);
-                       else {
-                               tprints(", { ");
-                               tprint_iov(tcp, hdtr.hdr_cnt, hdtr.headers, 1);
-                               tprintf(", %u, ", hdtr.hdr_cnt);
-                               tprint_iov(tcp, hdtr.trl_cnt, hdtr.trailers, 1);
-                               tprintf(", %u }", hdtr.hdr_cnt);
-                       }
-               }
-               if (!tcp->u_arg[6])
-                       tprints(", 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]);
-       }
-       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
@@ -332,6 +218,26 @@ sys_pwrite(struct tcb *tcp)
 }
 
 #if HAVE_SYS_UIO_H
+
+static void
+print_llu_from_low_high_val(struct tcb *tcp, int arg)
+{
+#if SIZEOF_LONG == SIZEOF_LONG_LONG
+       tprintf("%lu", (unsigned long) tcp->u_arg[arg]);
+#elif defined(LINUX_MIPSN32)
+       tprintf("%llu", (unsigned long long) tcp->ext_arg[arg]);
+#else
+# ifdef X32
+       if (current_personality == 0)
+               tprintf("%llu", (unsigned long long) tcp->ext_arg[arg]);
+       else
+# endif
+       tprintf("%llu",
+               ((unsigned long long) (unsigned long) tcp->u_arg[arg + 1] << sizeof(long) * 8)
+               | (unsigned long long) (unsigned long) tcp->u_arg[arg]);
+#endif
+}
+
 int
 sys_preadv(struct tcb *tcp)
 {
@@ -345,7 +251,7 @@ sys_preadv(struct tcb *tcp)
                }
                tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
                tprintf(", %lu, ", tcp->u_arg[2]);
-               printllval(tcp, "%llu", PREAD_OFFSET_ARG);
+               print_llu_from_low_high_val(tcp, 3);
        }
        return 0;
 }
@@ -358,34 +264,53 @@ sys_pwritev(struct tcb *tcp)
                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);
+               print_llu_from_low_high_val(tcp, 3);
        }
        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_sendfile(struct tcb *tcp)
 {
        if (entering(tcp)) {
-               off_t offset;
-
                printfd(tcp, tcp->u_arg[0]);
                tprints(", ");
                printfd(tcp, tcp->u_arg[1]);
                tprints(", ");
-               if (!tcp->u_arg[2])
-                       tprints("NULL");
-               else if (umove(tcp, tcp->u_arg[2], &offset) < 0)
-                       tprintf("%#lx", tcp->u_arg[2]);
-               else
-                       tprintf("[%lu]", offset);
+               print_off_t(tcp, tcp->u_arg[2]);
                tprintf(", %lu", tcp->u_arg[3]);
        }
        return 0;
 }
 
-static void
+void
 print_loff_t(struct tcb *tcp, long addr)
 {
        loff_t offset;
@@ -412,21 +337,7 @@ sys_sendfile64(struct tcb *tcp)
        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                },
-};
+#include "xlat/splice_flags.h"
 
 int
 sys_tee(struct tcb *tcp)
@@ -479,18 +390,17 @@ sys_vmsplice(struct tcb *tcp)
                tprints(", ");
                /* const struct iovec *iov, unsigned long nr_segs */
                tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1], 1);
-               tprints(", ");
+               tprintf(", %lu, ", tcp->u_arg[2]);
                /* unsigned int flags */
                printflags(splice_flags, tcp->u_arg[3], "SPLICE_F_???");
        }
        return 0;
 }
-#endif /* LINUX */
 
 int
 sys_ioctl(struct tcb *tcp)
 {
-       const struct ioctlent *iop;
+       const struct_ioctlent *iop;
 
        if (entering(tcp)) {
                printfd(tcp, tcp->u_arg[0]);