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freebsd-skq/lib/libsysdecode/sysdecode.h
John Baldwin ffb6607984 Decode kevent structures logged via ktrace(2) in kdump. 
- Add a new KTR_STRUCT_ARRAY ktrace record type which dumps an array of
  structures.

  The structure name in the record payload is preceded by a size_t
  containing the size of the individual structures.  Use this to
  replace the previous code that dumped the kevent arrays dumped for
  kevent().  kdump is now able to decode the kevent structures rather
  than dumping their contents via a hexdump.

  One change from before is that the 'changes' and 'events' arrays are
  not marked with separate 'read' and 'write' annotations in kdump
  output.  Instead, the first array is the 'changes' array, and the
  second array (only present if kevent doesn't fail with an error) is
  the 'events' array.  For kevent(), empty arrays are denoted by an
  entry with an array containing zero entries rather than no record.

- Move kevent decoding tables from truss to libsysdecode.

  This adds three new functions to decode members of struct kevent:
  sysdecode_kevent_filter, sysdecode_kevent_flags, and
  sysdecode_kevent_fflags.

  kdump uses these helper functions to pretty-print kevent fields.

- Move structure definitions for freebsd11 and freebsd32 kevent
  structures to <sys/event.h> so that they can be shared with userland.
  The 32-bit structures are only exposed if _WANT_KEVENT32 is defined.
  The freebsd11 structures are only exposed if _WANT_FREEBSD11_KEVENT is
  defined.  The 32-bit freebsd11 structure requires both.

- Decode freebsd11 kevent structures in truss for the compat11.kevent()
  system call.

- Log 32-bit kevent structures via ktrace for 32-bit compat kevent()
  system calls.

- While here, constify the 'void *data' argument to ktrstruct().

Reviewed by:	kib (earlier version)
MFC after:	1 month
Differential Revision:	https://reviews.freebsd.org/D12470
2017-11-25 04:49:12 +00:00

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/*-
* Copyright (c) 2015 John H. Baldwin <jhb@FreeBSD.org>
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*
* $FreeBSD$
*/
#ifndef __SYSDECODE_H__
#define __SYSDECODE_H__
enum sysdecode_abi {
SYSDECODE_ABI_UNKNOWN = 0,
SYSDECODE_ABI_FREEBSD,
SYSDECODE_ABI_FREEBSD32,
SYSDECODE_ABI_LINUX,
SYSDECODE_ABI_LINUX32,
SYSDECODE_ABI_CLOUDABI64
};
int sysdecode_abi_to_freebsd_errno(enum sysdecode_abi _abi, int _error);
bool sysdecode_access_mode(FILE *_fp, int _mode, int *_rem);
const char *sysdecode_acltype(int _type);
const char *sysdecode_atfd(int _fd);
bool sysdecode_atflags(FILE *_fp, int _flags, int *_rem);
bool sysdecode_cap_fcntlrights(FILE *_fp, uint32_t _rights, uint32_t *_rem);
void sysdecode_cap_rights(FILE *_fp, cap_rights_t *_rightsp);
const char *sysdecode_extattrnamespace(int _namespace);
const char *sysdecode_fadvice(int _advice);
void sysdecode_fcntl_arg(FILE *_fp, int _cmd, uintptr_t _arg, int _base);
bool sysdecode_fcntl_arg_p(int _cmd);
const char *sysdecode_fcntl_cmd(int _cmd);
bool sysdecode_fcntl_fileflags(FILE *_fp, int _flags, int *_rem);
bool sysdecode_fileflags(FILE *_fp, fflags_t _flags, fflags_t *_rem);
bool sysdecode_filemode(FILE *_fp, int _mode, int *_rem);
bool sysdecode_flock_operation(FILE *_fp, int _operation, int *_rem);
int sysdecode_freebsd_to_abi_errno(enum sysdecode_abi _abi, int _error);
const char *sysdecode_getfsstat_mode(int _mode);
const char *sysdecode_getrusage_who(int _who);
const char *sysdecode_idtype(int _idtype);
const char *sysdecode_ioctlname(unsigned long _val);
const char *sysdecode_ipproto(int _protocol);
void sysdecode_kevent_fflags(FILE *_fp, short _filter, int _fflags,
int _base);
const char *sysdecode_kevent_filter(int _filter);
bool sysdecode_kevent_flags(FILE *_fp, int _flags, int *_rem);
const char *sysdecode_kldsym_cmd(int _cmd);
const char *sysdecode_kldunload_flags(int _flags);
const char *sysdecode_lio_listio_mode(int _mode);
const char *sysdecode_madvice(int _advice);
const char *sysdecode_minherit_inherit(int _inherit);
const char *sysdecode_msgctl_cmd(int _cmd);
bool sysdecode_mlockall_flags(FILE *_fp, int _flags, int *_rem);
bool sysdecode_mmap_flags(FILE *_fp, int _flags, int *_rem);
bool sysdecode_mmap_prot(FILE *_fp, int _prot, int *_rem);
bool sysdecode_mount_flags(FILE *_fp, int _flags, int *_rem);
bool sysdecode_msg_flags(FILE *_fp, int _flags, int *_rem);
bool sysdecode_msync_flags(FILE *_fp, int _flags, int *_rem);
const char *sysdecode_nfssvc_flags(int _flags);
bool sysdecode_open_flags(FILE *_fp, int _flags, int *_rem);
const char *sysdecode_pathconf_name(int _name);
bool sysdecode_pipe2_flags(FILE *_fp, int _flags, int *_rem);
const char *sysdecode_prio_which(int _which);
const char *sysdecode_procctl_cmd(int _cmd);
const char *sysdecode_ptrace_request(int _request);
bool sysdecode_quotactl_cmd(FILE *_fp, int _cmd);
bool sysdecode_reboot_howto(FILE *_fp, int _howto, int *_rem);
bool sysdecode_rfork_flags(FILE *_fp, int _flags, int *_rem);
const char *sysdecode_rlimit(int _resource);
const char *sysdecode_rtprio_function(int _function);
const char *sysdecode_scheduler_policy(int _policy);
const char *sysdecode_semctl_cmd(int _cmd);
bool sysdecode_semget_flags(FILE *_fp, int _flag, int *_rem);
bool sysdecode_sendfile_flags(FILE *_fp, int _flags, int *_rem);
bool sysdecode_shmat_flags(FILE *_fp, int _flags, int *_rem);
const char *sysdecode_shmctl_cmd(int _cmd);
const char *sysdecode_shutdown_how(int _how);
const char *sysdecode_sigbus_code(int _si_code);
const char *sysdecode_sigchld_code(int _si_code);
const char *sysdecode_sigcode(int _sig, int _si_code);
const char *sysdecode_sigfpe_code(int _si_code);
const char *sysdecode_sigill_code(int _si_code);
const char *sysdecode_signal(int _sig);
const char *sysdecode_sigprocmask_how(int _how);
const char *sysdecode_sigsegv_code(int _si_code);
const char *sysdecode_sigtrap_code(int _si_code);
const char *sysdecode_sockaddr_family(int _sa_family);
const char *sysdecode_socketdomain(int _domain);
const char *sysdecode_socket_protocol(int _domain, int _protocol);
bool sysdecode_socket_type(FILE *_fp, int _type, int *_rem);
const char *sysdecode_sockopt_level(int _level);
const char *sysdecode_sockopt_name(int _level, int _optname);
const char *sysdecode_syscallname(enum sysdecode_abi _abi, unsigned int _code);
const char *sysdecode_sysarch_number(int _number);
bool sysdecode_thr_create_flags(FILE *_fp, int _flags, int *_rem);
bool sysdecode_umtx_cvwait_flags(FILE *_fp, u_long _flags, u_long *_rem);
const char *sysdecode_umtx_op(int _op);
bool sysdecode_umtx_rwlock_flags(FILE *_fp, u_long _flags, u_long *_rem);
int sysdecode_utrace(FILE *_fp, void *_buf, size_t _len);
bool sysdecode_vmprot(FILE *_fp, int _type, int *_rem);
const char *sysdecode_vmresult(int _result);
bool sysdecode_wait4_options(FILE *_fp, int _options, int *_rem);
bool sysdecode_wait6_options(FILE *_fp, int _options, int *_rem);
const char *sysdecode_whence(int _whence);
#endif /* !__SYSDECODE_H__ */
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