]> granicus.if.org Git - strace/blobdiff - desc.c
Fix decoding of file descriptors
[strace] / desc.c
diff --git a/desc.c b/desc.c
index 47aa92c8709581e4dd86768efc070f1bd9f9fe2d..790b10bb1e5cbfc1c508dfaf17756e60d0f7c7ac 100644 (file)
--- a/desc.c
+++ b/desc.c
@@ -147,6 +147,18 @@ static const struct xlat fcntlcmds[] = {
 #endif
 #ifdef F_UNSHARE
        { F_UNSHARE,    "F_UNSHARE"     },
+#endif
+#ifdef F_SETLEASE
+       { F_SETLEASE,   "F_SETLEASE"    },
+#endif
+#ifdef F_GETLEASE
+       { F_GETLEASE,   "F_GETLEASE"    },
+#endif
+#ifdef F_NOTIFY
+       { F_NOTIFY,     "F_NOTIFY"      },
+#endif
+#ifdef F_DUPFD_CLOEXEC
+       { F_DUPFD_CLOEXEC,"F_DUPFD_CLOEXEC"},
 #endif
        { 0,            NULL            },
 };
@@ -183,6 +195,33 @@ static const struct xlat lockfcmds[] = {
        { 0,            NULL            },
 };
 
+#ifdef F_NOTIFY
+static const struct xlat notifyflags[] = {
+#ifdef DN_ACCESS
+       { DN_ACCESS,    "DN_ACCESS"     },
+#endif
+#ifdef DN_MODIFY
+       { DN_MODIFY,    "DN_MODIFY"     },
+#endif
+#ifdef DN_CREATE
+       { DN_CREATE,    "DN_CREATE"     },
+#endif
+#ifdef DN_DELETE
+       { DN_DELETE,    "DN_DELETE"     },
+#endif
+#ifdef DN_RENAME
+       { DN_RENAME,    "DN_RENAME"     },
+#endif
+#ifdef DN_ATTRIB
+       { DN_ATTRIB,    "DN_ATTRIB"     },
+#endif
+#ifdef DN_MULTISHOT
+       { DN_MULTISHOT, "DN_MULTISHOT"  },
+#endif
+       { 0,            NULL            },
+};
+#endif
+
 static const struct xlat whence[] = {
        { SEEK_SET,     "SEEK_SET"      },
        { SEEK_CUR,     "SEEK_CUR"      },
@@ -193,16 +232,43 @@ static const struct xlat whence[] = {
 #ifndef HAVE_LONG_LONG_OFF_T
 /* fcntl/lockf */
 static void
-printflock(tcp, addr, getlk)
-struct tcb *tcp;
-long addr;
-int getlk;
+printflock(struct tcb *tcp, long addr, int getlk)
 {
        struct flock fl;
 
-       if (umove(tcp, addr, &fl) < 0) {
-               tprintf("{...}");
-               return;
+#if SUPPORTED_PERSONALITIES > 1
+       if (personality_wordsize[current_personality] != sizeof(fl.l_start)) {
+               if (personality_wordsize[current_personality] == 4) {
+                       /* 32-bit x86 app on x86_64 and similar cases */
+                       struct {
+                               short int l_type;
+                               short int l_whence;
+                               int32_t l_start; /* off_t */
+                               int32_t l_len; /* off_t */
+                               int32_t l_pid; /* pid_t */
+                       } fl32;
+                       if (umove(tcp, addr, &fl32) < 0) {
+                               tprintf("{...}");
+                               return;
+                       }
+                       fl.l_type = fl32.l_type;
+                       fl.l_whence = fl32.l_whence;
+                       fl.l_start = fl32.l_start;
+                       fl.l_len = fl32.l_len;
+                       fl.l_pid = fl32.l_pid;
+               } else {
+                       /* let people know we have a problem here */
+                       tprintf("{ <decode error: unsupported wordsize %d> }",
+                               personality_wordsize[current_personality]);
+                       return;
+               }
+       } else
+#endif
+       {
+               if (umove(tcp, addr, &fl) < 0) {
+                       tprintf("{...}");
+                       return;
+               }
        }
        tprintf("{type=");
        printxval(lockfcmds, fl.l_type, "F_???");
@@ -219,10 +285,7 @@ int getlk;
 #if _LFS64_LARGEFILE || HAVE_LONG_LONG_OFF_T
 /* fcntl/lockf */
 static void
-printflock64(tcp, addr, getlk)
-struct tcb *tcp;
-long addr;
-int getlk;
+printflock64(struct tcb *tcp, long addr, int getlk)
 {
        struct flock64 fl;
 
@@ -242,50 +305,12 @@ int getlk;
 }
 #endif
 
-/*
- * low bits of the open(2) flags define access mode,
- * other bits are real flags.
- */
-static const char *
-sprint_open_modes(mode_t flags)
-{
-       extern const struct xlat open_access_modes[];
-       extern const struct xlat open_mode_flags[];
-       static char outstr[1024];
-       const char *str = xlookup(open_access_modes, flags & 3);
-       const char *sep = "";
-       const struct xlat *x;
-
-       strcpy(outstr, "flags ");
-       if (str)
-       {
-               strcat(outstr, str);
-               flags &= ~3;
-               if (!flags)
-                       return outstr;
-               strcat(outstr, "|");
-       }
-
-       for (x = open_mode_flags; x->str; x++)
-       {
-               if ((flags & x->val) == x->val)
-               {
-                       sprintf(outstr + strlen(outstr),
-                               "%s%s", sep, x->str);
-                       sep = "|";
-                       flags &= ~x->val;
-               }
-       }
-       if (flags)
-               sprintf(outstr + strlen(outstr), "%s%#x", sep, flags);
-       return outstr;
-}
-
 int
 sys_fcntl(struct tcb *tcp)
 {
        if (entering(tcp)) {
-               tprintf("%ld, ", tcp->u_arg[0]);
+               printfd(tcp, tcp->u_arg[0]);
+               tprintf(", ");
                printxval(fcntlcmds, tcp->u_arg[1], "F_???");
                switch (tcp->u_arg[1]) {
                case F_SETFD:
@@ -293,11 +318,14 @@ sys_fcntl(struct tcb *tcp)
                        printflags(fdflags, tcp->u_arg[2], "FD_???");
                        break;
                case F_SETOWN: case F_DUPFD:
+#ifdef F_DUPFD_CLOEXEC
+               case F_DUPFD_CLOEXEC:
+#endif
                        tprintf(", %ld", tcp->u_arg[2]);
                        break;
                case F_SETFL:
                        tprintf(", ");
-                       tprint_open_modes(tcp, tcp->u_arg[2]);
+                       tprint_open_modes(tcp->u_arg[2]);
                        break;
                case F_SETLK: case F_SETLKW:
 #ifdef F_FREESP
@@ -312,32 +340,54 @@ sys_fcntl(struct tcb *tcp)
 #endif
                /* Linux glibc defines SETLK64 as SETLK,
                   even though the kernel has different values - as does Solaris. */
-#if defined(F_SETLK64) && F_SETLK64+0!=F_SETLK
+#if defined(F_SETLK64) && F_SETLK64 + 0 != F_SETLK
                case F_SETLK64:
 #endif
-#if defined(F_SETLKW64) && F_SETLKW64+0!=F_SETLKW
+#if defined(F_SETLKW64) && F_SETLKW64 + 0 != F_SETLKW
                case F_SETLKW64:
 #endif
                        tprintf(", ");
                        printflock64(tcp, tcp->u_arg[2], 0);
                        break;
 #endif
-               }
+#ifdef F_NOTIFY
+               case F_NOTIFY:
+                       tprintf(", ");
+                       printflags(notifyflags, tcp->u_arg[2], "DN_???");
+                       break;
+#endif
+#ifdef F_SETLEASE
+               case F_SETLEASE:
+                       tprintf(", ");
+                       printxval(lockfcmds, tcp->u_arg[2], "F_???");
+                       break;
+#endif
+               }
        }
        else {
                switch (tcp->u_arg[1]) {
                case F_DUPFD:
+#ifdef F_DUPFD_CLOEXEC
+               case F_DUPFD_CLOEXEC:
+#endif
                case F_SETFD: case F_SETFL:
                case F_SETLK: case F_SETLKW:
                case F_SETOWN: case F_GETOWN:
+#ifdef F_NOTIFY
+               case F_NOTIFY:
+#endif
+#ifdef F_SETLEASE
+               case F_SETLEASE:
+#endif
                        break;
                case F_GETFD:
-                       if (tcp->u_rval == 0)
+                       if (syserror(tcp) || tcp->u_rval == 0)
                                return 0;
-                       tcp->auxstr =
-                               sprintflags("flags ", fdflags, tcp->u_rval);
+                       tcp->auxstr = sprintflags("flags ", fdflags, tcp->u_rval);
                        return RVAL_HEX|RVAL_STR;
                case F_GETFL:
+                       if (syserror(tcp))
+                               return 0;
                        tcp->auxstr = sprint_open_modes(tcp->u_rval);
                        return RVAL_HEX|RVAL_STR;
                case F_GETLK:
@@ -352,7 +402,14 @@ sys_fcntl(struct tcb *tcp)
                        printflock64(tcp, tcp->u_arg[2], 1);
                        break;
 #endif
-               default:
+#ifdef F_GETLEASE
+               case F_GETLEASE:
+                       if (syserror(tcp))
+                               return 0;
+                       tcp->auxstr = xlookup(lockfcmds, tcp->u_rval);
+                       return RVAL_HEX|RVAL_STR;
+#endif
+               default:
                        tprintf(", %#lx", tcp->u_arg[2]);
                        break;
                }
@@ -363,11 +420,11 @@ sys_fcntl(struct tcb *tcp)
 #ifdef LOCK_SH
 
 int
-sys_flock(tcp)
-struct tcb *tcp;
+sys_flock(struct tcb *tcp)
 {
        if (entering(tcp)) {
-               tprintf("%ld, ", tcp->u_arg[0]);
+               printfd(tcp, tcp->u_arg[0]);
+               tprintf(", ");
                printflags(flockcmds, tcp->u_arg[1], "LOCK_???");
        }
        return 0;
@@ -375,39 +432,55 @@ struct tcb *tcp;
 #endif /* LOCK_SH */
 
 int
-sys_close(tcp)
-struct tcb *tcp;
+sys_close(struct tcb *tcp)
 {
        if (entering(tcp)) {
-               tprintf("%ld", tcp->u_arg[0]);
+               printfd(tcp, tcp->u_arg[0]);
        }
        return 0;
 }
 
 int
-sys_dup(tcp)
-struct tcb *tcp;
+sys_dup(struct tcb *tcp)
 {
        if (entering(tcp)) {
-               tprintf("%ld", tcp->u_arg[0]);
+               printfd(tcp, tcp->u_arg[0]);
        }
        return 0;
 }
 
-int
-sys_dup2(tcp)
-struct tcb *tcp;
+static int
+do_dup2(struct tcb *tcp, int flags_arg)
 {
        if (entering(tcp)) {
-               tprintf("%ld, %ld", tcp->u_arg[0], tcp->u_arg[1]);
+               printfd(tcp, tcp->u_arg[0]);
+               tprintf(", ");
+               printfd(tcp, tcp->u_arg[1]);
+               if (flags_arg >= 0) {
+                       tprintf(", ");
+                       printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
+               }
        }
        return 0;
 }
 
+int
+sys_dup2(struct tcb *tcp)
+{
+       return do_dup2(tcp, -1);
+}
+
+#ifdef LINUX
+int
+sys_dup3(struct tcb *tcp)
+{
+       return do_dup2(tcp, 2);
+}
+#endif
+
 #if defined(ALPHA) || defined(FREEBSD) || defined(SUNOS4)
 int
-sys_getdtablesize(tcp)
-struct tcb *tcp;
+sys_getdtablesize(struct tcb *tcp)
 {
        return 0;
 }
@@ -421,7 +494,7 @@ decode_select(struct tcb *tcp, long *args, enum bitness_t bitness)
                               & -sizeof(long));
        fd_set *fds;
        static char outstr[1024];
-       char *sep;
+       const char *sep;
        long arg;
 
        if (entering(tcp)) {
@@ -447,7 +520,8 @@ decode_select(struct tcb *tcp, long *args, enum bitness_t bitness)
                        tprintf(", [");
                        for (j = 0, sep = ""; j < nfds; j++) {
                                if (FD_ISSET(j, fds)) {
-                                       tprintf("%s%u", sep, j);
+                                       tprintf("%s", sep);
+                                       printfd(tcp, j);
                                        sep = " ";
                                }
                        }
@@ -460,7 +534,7 @@ decode_select(struct tcb *tcp, long *args, enum bitness_t bitness)
        else
        {
                unsigned int cumlen = 0;
-               char *sep = "";
+               const char *sep = "";
 
                if (syserror(tcp))
                        return 0;
@@ -477,7 +551,6 @@ decode_select(struct tcb *tcp, long *args, enum bitness_t bitness)
                outstr[0] = '\0';
                for (i = 0; i < 3; i++) {
                        int first = 1;
-                       char str[20];
 
                        tcp->auxstr = outstr;
                        arg = args[i+1];
@@ -486,6 +559,8 @@ decode_select(struct tcb *tcp, long *args, enum bitness_t bitness)
                                continue;
                        for (j = 0; j < args[0]; j++) {
                                if (FD_ISSET(j, fds)) {
+                                       char str[11 + 3 * sizeof(int)];
+
                                        if (first) {
                                                sprintf(str, "%s%s [%u", sep,
                                                        i == 0 ? "in" :
@@ -527,8 +602,7 @@ decode_select(struct tcb *tcp, long *args, enum bitness_t bitness)
 #ifdef LINUX
 
 int
-sys_oldselect(tcp)
-struct tcb *tcp;
+sys_oldselect(struct tcb *tcp)
 {
        long args[5];
 
@@ -541,15 +615,14 @@ struct tcb *tcp;
 
 #ifdef ALPHA
 int
-sys_osf_select(tcp)
-struct tcb *tcp;
+sys_osf_select(struct tcb *tcp)
 {
        long *args = tcp->u_arg;
        return decode_select(tcp, args, BITNESS_32);
 }
 #endif
 
-static struct xlat epollctls[] = {
+static const struct xlat epollctls[] = {
 #ifdef EPOLL_CTL_ADD
        { EPOLL_CTL_ADD,        "EPOLL_CTL_ADD" },
 #endif
@@ -562,7 +635,7 @@ static struct xlat epollctls[] = {
        { 0,                    NULL            }
 };
 
-static struct xlat epollevents[] = {
+static const struct xlat epollevents[] = {
 #ifdef EPOLLIN
        { EPOLLIN,      "EPOLLIN"       },
 #endif
@@ -603,18 +676,24 @@ static struct xlat epollevents[] = {
 };
 
 int
-sys_epoll_create(tcp)
-struct tcb *tcp;
+sys_epoll_create(struct tcb *tcp)
 {
        if (entering(tcp))
                tprintf("%ld", tcp->u_arg[0]);
        return 0;
 }
 
+int
+sys_epoll_create1(struct tcb *tcp)
+{
+       if (entering(tcp))
+               printflags(open_mode_flags, tcp->u_arg[0], "O_???");
+       return 0;
+}
+
 #ifdef HAVE_SYS_EPOLL_H
 static void
-print_epoll_event(ev)
-struct epoll_event *ev;
+print_epoll_event(struct epoll_event *ev)
 {
        tprintf("{");
        printflags(epollevents, ev->events, "EPOLL???");
@@ -626,13 +705,15 @@ struct epoll_event *ev;
 #endif
 
 int
-sys_epoll_ctl(tcp)
-struct tcb *tcp;
+sys_epoll_ctl(struct tcb *tcp)
 {
        if (entering(tcp)) {
-               tprintf("%ld, ", tcp->u_arg[0]);
-                printxval(epollctls, tcp->u_arg[1], "EPOLL_CTL_???");
-               tprintf(", %ld, ", tcp->u_arg[2]);
+               printfd(tcp, tcp->u_arg[0]);
+               tprintf(", ");
+               printxval(epollctls, tcp->u_arg[1], "EPOLL_CTL_???");
+               tprintf(", ");
+               printfd(tcp, tcp->u_arg[2]);
+               tprintf(", ");
                if (tcp->u_arg[3] == 0)
                        tprintf("NULL");
                else {
@@ -649,12 +730,12 @@ struct tcb *tcp;
 }
 
 static void
-epoll_wait_common(tcp)
-struct tcb *tcp;
+epoll_wait_common(struct tcb *tcp)
 {
-       if (entering(tcp))
-               tprintf("%ld, ", tcp->u_arg[0]);
-       else {
+       if (entering(tcp)) {
+               printfd(tcp, tcp->u_arg[0]);
+               tprintf(", ");
+       } else {
                if (syserror(tcp))
                        tprintf("%lx", tcp->u_arg[1]);
                else if (tcp->u_rval == 0)
@@ -690,26 +771,25 @@ struct tcb *tcp;
 }
 
 int
-sys_epoll_wait(tcp)
-struct tcb *tcp;
+sys_epoll_wait(struct tcb *tcp)
 {
        epoll_wait_common(tcp);
        return 0;
 }
 
 int
-sys_epoll_pwait(tcp)
-struct tcb *tcp;
+sys_epoll_pwait(struct tcb *tcp)
 {
        epoll_wait_common(tcp);
-       if (exiting(tcp))
+       if (exiting(tcp)) {
+               tprintf(", ");
                print_sigset(tcp, tcp->u_arg[4], 0);
+       }
        return 0;
 }
 
 int
-sys_io_setup(tcp)
-struct tcb *tcp;
+sys_io_setup(struct tcb *tcp)
 {
        if (entering(tcp))
                tprintf("%ld, ", tcp->u_arg[0]);
@@ -728,8 +808,7 @@ struct tcb *tcp;
 }
 
 int
-sys_io_destroy(tcp)
-struct tcb *tcp;
+sys_io_destroy(struct tcb *tcp)
 {
        if (entering(tcp))
                tprintf("%lu", tcp->u_arg[0]);
@@ -737,8 +816,7 @@ struct tcb *tcp;
 }
 
 int
-sys_io_submit(tcp)
-struct tcb *tcp;
+sys_io_submit(struct tcb *tcp)
 {
        long nr;
        if (entering(tcp)) {
@@ -780,8 +858,7 @@ struct tcb *tcp;
 }
 
 int
-sys_io_cancel(tcp)
-struct tcb *tcp;
+sys_io_cancel(struct tcb *tcp)
 {
        if (entering(tcp)) {
 #ifdef HAVE_LIBAIO_H
@@ -807,7 +884,7 @@ struct tcb *tcp;
                                tprintf("{%p, %p, %ld, %ld}",
                                        event.data, event.obj,
                                        event.res, event.res2);
-                       else 
+                       else
 #endif
                                tprintf("{...}");
                }
@@ -816,8 +893,7 @@ struct tcb *tcp;
 }
 
 int
-sys_io_getevents(tcp)
-struct tcb *tcp;
+sys_io_getevents(struct tcb *tcp)
 {
        if (entering(tcp)) {
                tprintf("%ld, %ld, %ld, ", tcp->u_arg[0], tcp->u_arg[1],
@@ -851,23 +927,14 @@ struct tcb *tcp;
 #endif
                }
 
-               if (tcp->u_arg[4] == 0)
-                       tprintf("NULL");
-               else {
-                       struct timespec to;
-                       if (umove(tcp, tcp->u_arg[4], &to) == 0)
-                               tprintf("{%lu, %lu}", to.tv_sec, to.tv_nsec);
-                       else
-                               tprintf("{...}");
-               }
+               print_timespec(tcp, tcp->u_arg[4]);
        }
        return 0;
 }
 #endif /* LINUX */
 
 int
-sys_select(tcp)
-struct tcb *tcp;
+sys_select(struct tcb *tcp)
 {
        return decode_select(tcp, tcp->u_arg, BITNESS_CURRENT);
 }
@@ -877,7 +944,7 @@ int
 sys_pselect6(struct tcb *tcp)
 {
        int rc = decode_select(tcp, tcp->u_arg, BITNESS_CURRENT);
-       if (exiting(tcp)) {
+       if (entering(tcp)) {
                struct {
                        void *ss;
                        unsigned long len;
@@ -886,7 +953,7 @@ sys_pselect6(struct tcb *tcp)
                        tprintf(", %#lx", tcp->u_arg[5]);
                else {
                        tprintf(", {");
-                       if (data.len < sizeof(sigset_t))
+                       if (data.len < sizeof(long))
                                tprintf("%#lx", (long)data.ss);
                        else
                                print_sigset(tcp, (long)data.ss, 0);
@@ -896,12 +963,28 @@ sys_pselect6(struct tcb *tcp)
        return rc;
 }
 
-int
-sys_eventfd(tcp)
-struct tcb *tcp;
+static int
+do_eventfd(struct tcb *tcp, int flags_arg)
 {
-       if (entering(tcp))
+       if (entering(tcp)) {
                tprintf("%lu", tcp->u_arg[0]);
+               if (flags_arg >= 0) {
+                       tprintf(", ");
+                       printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
+               }
+       }
        return 0;
 }
+
+int
+sys_eventfd(struct tcb *tcp)
+{
+       return do_eventfd(tcp, -1);
+}
+
+int
+sys_eventfd2(struct tcb *tcp)
+{
+       return do_eventfd(tcp, 1);
+}
 #endif