mmap_cache: add function to enable mmap_cache

[strace] / open.c

diff --git a/open.c b/open.c
index 5d82981fa63b9341962914efb48bd297b9e2f882..afa5020c7f70f784818ab67caa32544dde2e91c7 100644 (file)
--- a/open.c
+++ b/open.c
@@ -1,15 +1,50 @@
+/*
+ * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
+ * 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) 2005-2007 Roland McGrath <roland@redhat.com>
+ * Copyright (c) 2006-2007 Ulrich Drepper <drepper@redhat.com>
+ * Copyright (c) 2009-2013 Denys Vlasenko <dvlasenk@redhat.com>
+ * Copyright (c) 2005-2015 Dmitry V. Levin <ldv@altlinux.org>
+ * Copyright (c) 2014-2018 The strace developers.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * 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.
+ */
+
 #include "defs.h"
+#include "xstring.h"
 
-#include <fcntl.h>
+#include <asm/fcntl.h>
+
+/* some libcs are guilty of messing up with O_ACCMODE */
+#undef O_ACCMODE
+#define O_ACCMODE 03
 
 #ifdef O_LARGEFILE
-# if O_LARGEFILE == 0          /* biarch platforms in 64-bit mode */
+# if O_LARGEFILE == 0          /* biarch platforms in 64-bit mode */
 #  undef O_LARGEFILE
-#  ifdef SPARC64
-#   define O_LARGEFILE 0x40000
-#  elif defined X86_64 || defined S390X
-#   define O_LARGEFILE 0100000
-#  endif
 # endif
 #endif
 
@@ -17,7 +52,7 @@
 #include "xlat/open_mode_flags.h"
 
 #ifndef AT_FDCWD
-# define AT_FDCWD                -100
+# define AT_FDCWD      -100
 #endif
 
 /* The fd is an "int", so when decoding x86 on x86_64, we need to force sign
@@ -39,7 +74,7 @@ print_dirfd(struct tcb *tcp, int fd)
  * other bits are real flags.
  */
 const char *
-sprint_open_modes(int flags)
+sprint_open_modes(unsigned int flags)
 {
        static char outstr[(1 + ARRAY_SIZE(open_mode_flags)) * sizeof("O_LARGEFILE")];
        char *p;
@@ -71,52 +106,55 @@ sprint_open_modes(int flags)
        }
        /* flags is still nonzero */
        *p++ = sep;
-       sprintf(p, "%#x", flags);
+       p = xappendstr(outstr, p, "%#x", flags);
        return outstr;
 }
 
 void
-tprint_open_modes(int flags)
+tprint_open_modes(unsigned int flags)
 {
        tprints(sprint_open_modes(flags) + sizeof("flags"));
 }
 
+#ifdef O_TMPFILE
+/* The kernel & C libraries often inline O_DIRECTORY. */
+# define STRACE_O_TMPFILE (O_TMPFILE & ~O_DIRECTORY)
+#else /* !O_TMPFILE */
+# define STRACE_O_TMPFILE 0
+#endif
+
 static int
 decode_open(struct tcb *tcp, int offset)
 {
-       if (entering(tcp)) {
-               printpath(tcp, tcp->u_arg[offset]);
+       printpath(tcp, tcp->u_arg[offset]);
+       tprints(", ");
+       /* flags */
+       tprint_open_modes(tcp->u_arg[offset + 1]);
+       if (tcp->u_arg[offset + 1] & (O_CREAT | STRACE_O_TMPFILE)) {
+               /* mode */
                tprints(", ");
-               /* flags */
-               tprint_open_modes(tcp->u_arg[offset + 1]);
-               if (tcp->u_arg[offset + 1] & O_CREAT) {
-                       /* mode */
-                       tprintf(", %#lo", tcp->u_arg[offset + 2]);
-               }
+               print_numeric_umode_t(tcp->u_arg[offset + 2]);
        }
-       return RVAL_FD;
+
+       return RVAL_DECODED | RVAL_FD;
 }
 
-int
-sys_open(struct tcb *tcp)
+SYS_FUNC(open)
 {
        return decode_open(tcp, 0);
 }
 
-int
-sys_openat(struct tcb *tcp)
+SYS_FUNC(openat)
 {
-       if (entering(tcp))
-               print_dirfd(tcp, tcp->u_arg[0]);
+       print_dirfd(tcp, tcp->u_arg[0]);
        return decode_open(tcp, 1);
 }
 
-int
-sys_creat(struct tcb *tcp)
+SYS_FUNC(creat)
 {
-       if (entering(tcp)) {
-               printpath(tcp, tcp->u_arg[0]);
-               tprintf(", %#lo", tcp->u_arg[1]);
-       }
-       return RVAL_FD;
+       printpath(tcp, tcp->u_arg[0]);
+       tprints(", ");
+       print_numeric_umode_t(tcp->u_arg[1]);
+
+       return RVAL_DECODED | RVAL_FD;
 }