[PATCH v4 0/6] Add strace support for printing arguments of selected syscalls

[Filip Bozuta]

From: Filip Bozuta <Filip.Bozuta@syrmia.com>

This series covers strace support for printing arguments of following syscalls:

    *acct()           *lgetxattr()       *removexattr()       *lchown()
    *fsync()          *fgetxattr()       *lremovexattr()      *fallocate()
    *fdatasync()      *listxattr()       *fremovexattr()
    *listen()         *llistxattr()      *lseek()
    *getxattr()       *flistxattr()      *chown()

The implementation details for strace support is described in this series patch
commit messages.

Testing method:

    Mini test programs were written that run these syscalls for different 
arguments.
    Those programs were compiled (sometimes using cross-compilers) for the 
following
    architectures:

        * Intel 64-bit (little endian) (gcc)
        * Power pc 32-bit (big endian) (powerpc-linux-gnu-gcc)
        * Power pc 64-bit (big endian) (powerpc64-linux-gnu-gcc)
        * Mips 32-bit (little endian) (mipsel-linux-gnu-gcc)
        * Mips 64-bit (little endian) (mips64el-linux-gnuabi64-gcc)

    The corresponding native programs were executed with strace, without using
    QEMU, on Intel Core i7-4790K (x86_64) host.

    All applicable compiled programs were in turn executed with "-strace"
    through QEMU and the strace printing results obtained were the same 
    ones gotten for native execution.

v2:

    * Added patch that extends strace support by enabling argument printing
      after syscall execution
    * Added strace support for argument printing for syscalls:
      removexattr(), lremovexattr(), fremovexattr()
    * Added "print_syscall_ret_listxattr()" that prints list of extended
      attributes after execution of syscalls: listxattr(), llistxattr(),
      flistxattr()
    * Corrected formats in some printing functions
    * Moved target_offset64() function definition from "syscall.c" to
      "qemu.h"

v3:

    * Added generic function SYSCALL_RET_ERR() that checks the return value
      and prints the approppriate error message
    * Added "print_syscall_ret_llistxattr" and "print_syscall_ret_flistxattr"
      in strace.list for "llistxattr()" and "flistxattr()" that have same
      definition as "print_syscall_ret_listxattr"

v4:

    * Changed error printing from macro SYSCALL_RET_ERR() to function
      print_syscall_err()
    * Changed while loop in print_syscall_ret_listxattr() to check printed
      bytes against size of the return value


Filip Bozuta (6):
  linux-user: Extend strace support to enable argument printing after
    syscall execution
  linux-user: Add strace support for a group of syscalls
  linux-user: Add strace support for printing argument of syscalls used
    for extended attributes
  linux-user: Add strace support for printing arguments of lseek()
  linux-user: Add strace support for printing arguments of
    chown()/lchown()
  linux-user: Add strace support for printing arguments of fallocate()

 linux-user/qemu.h      |  20 ++-
 linux-user/strace.c    | 286 +++++++++++++++++++++++++++++++++++++----
 linux-user/strace.list |  37 +++---
 linux-user/syscall.c   |  18 +--
 4 files changed, 298 insertions(+), 63 deletions(-)

-- 
2.17.1