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linux-user: Add strace support for a group of syscalls

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This patch implements strace argument printing functionality for following syscalls:

    *acct - switch process accounting on or off

        int acct(const char *filename)
        man page: https://www.man7.org/linux/man-pages/man2/acct.2.html

    *fsync, fdatasync - synchronize a file's in-core state with storage device

        int fsync(int fd)
        int fdatasync(int fd)
        man page: https://www.man7.org/linux/man-pages/man2/fsync.2.html

    *listen - listen for connections on a socket

        int listen(int sockfd, int backlog)
        man page: https://www.man7.org/linux/man-pages/man2/listen.2.html

Implementation notes:

    Syscall acct() takes string as its only argument and thus a separate
    print function "print_acct" is stated in file "strace.list". This
    function is defined and implemented in "strace.c" by using an
    existing function used to print string arguments: "print_string()".
    All the other syscalls have only primitive argument types, so the
    rest of the implementation was handled by stating an appropriate
    printing format in file "strace.list".

Signed-off-by: Filip Bozuta <Filip.Bozuta@syrmia.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20200619123331.17387-3-filip.bozuta@syrmia.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Filip Bozuta 2020-06-19 14:33:27 +02:00 committed by Laurent Vivier
parent c84be71f68
commit c42569f65c
2 changed files with 16 additions and 5 deletions
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13
linux-user/strace.c
View File

@ -1357,6 +1357,18 @@ print_access(const struct syscallname *name,
}
#endif
#ifdef TARGET_NR_acct
static void
print_acct(const struct syscallname *name,
abi_long arg0, abi_long arg1, abi_long arg2,
abi_long arg3, abi_long arg4, abi_long arg5)
{
print_syscall_prologue(name);
print_string(arg0, 1);
print_syscall_epilogue(name);
}
#endif
#ifdef TARGET_NR_brk
static void
print_brk(const struct syscallname *name,
@ -1621,7 +1633,6 @@ print_fcntl(const struct syscallname *name,
#define print_fcntl64 print_fcntl
#endif
#ifdef TARGET_NR_futimesat
static void
print_futimesat(const struct syscallname *name,

8
linux-user/strace.list
View File

@ -13,7 +13,7 @@
{ TARGET_NR_access, "access" , NULL, print_access, NULL },
#endif
#ifdef TARGET_NR_acct
{ TARGET_NR_acct, "acct" , NULL, NULL, NULL },
{ TARGET_NR_acct, "acct" , NULL, print_acct, NULL },
#endif
#ifdef TARGET_NR_add_key
{ TARGET_NR_add_key, "add_key" , NULL, NULL, NULL },
@ -215,7 +215,7 @@
{ TARGET_NR_fcntl64, "fcntl64" , NULL, print_fcntl64, NULL },
#endif
#ifdef TARGET_NR_fdatasync
{ TARGET_NR_fdatasync, "fdatasync" , NULL, NULL, NULL },
{ TARGET_NR_fdatasync, "fdatasync" , "%s(%d)", NULL, NULL },
#endif
#ifdef TARGET_NR_fgetxattr
{ TARGET_NR_fgetxattr, "fgetxattr" , NULL, NULL, NULL },
@ -251,7 +251,7 @@
{ TARGET_NR_fstatfs64, "fstatfs64" , "%s(%d,%p)", NULL, NULL },
#endif
#ifdef TARGET_NR_fsync
{ TARGET_NR_fsync, "fsync" , NULL, NULL, NULL },
{ TARGET_NR_fsync, "fsync" , "%s(%d)", NULL, NULL },
#endif
#ifdef TARGET_NR_ftime
{ TARGET_NR_ftime, "ftime" , NULL, NULL, NULL },
@ -492,7 +492,7 @@
{ TARGET_NR_Linux, "Linux" , NULL, NULL, NULL },
#endif
#ifdef TARGET_NR_listen
{ TARGET_NR_listen, "listen" , NULL, NULL, NULL },
{ TARGET_NR_listen, "listen" , "%s(%d,%d)", NULL, NULL },
#endif
#ifdef TARGET_NR_listxattr
{ TARGET_NR_listxattr, "listxattr" , NULL, NULL, NULL },