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freebsd-dev/lib/libsysdecode/flags.c
Steven Hartland aa9bddf0a8 Fix libsysdecode vmprot flag decoding 
Fix the regex used to find vmprot table entries and add the missing include.

This fixes kdumps output of PFLT arguments which would previously look like:
5202 101546 ktrace   PFLT  0x5ae000 0x2<><invalid>2

They now display correctly:
5202 101546 ktrace   PFLT  0x5ac000 0x2<VM_PROT_WRITE>

MFC after:	1 week
2017-03-16 20:55:00 +00:00

980 lines
19 KiB
C
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/*
* Copyright (c) 2006 "David Kirchner" <dpk@dpk.net>. 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#define L2CAP_SOCKET_CHECKED
#include <sys/types.h>
#include <sys/acl.h>
#include <sys/capsicum.h>
#include <sys/extattr.h>
#include <sys/linker.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/procctl.h>
#include <sys/ptrace.h>
#include <sys/reboot.h>
#include <sys/resource.h>
#include <sys/rtprio.h>
#include <sys/sem.h>
#include <sys/shm.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/thr.h>
#include <sys/umtx.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>
#include <nfsserver/nfs.h>
#include <ufs/ufs/quota.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <aio.h>
#include <fcntl.h>
#include <sched.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <sysdecode.h>
#include <unistd.h>
#include <sys/bitstring.h>
#include <netgraph/bluetooth/include/ng_hci.h>
#include <netgraph/bluetooth/include/ng_l2cap.h>
#include <netgraph/bluetooth/include/ng_btsocket.h>
/*
* This is taken from the xlat tables originally in truss which were
* in turn taken from strace.
*/
struct name_table {
uintmax_t val;
const char *str;
};
#define X(a) { a, #a },
#define XEND { 0, NULL }
#define TABLE_START(n) static struct name_table n[] = {
#define TABLE_ENTRY X
#define TABLE_END XEND };
#include "tables.h"
#undef TABLE_START
#undef TABLE_ENTRY
#undef TABLE_END
/*
* These are simple support macros. print_or utilizes a variable
* defined in the calling function to track whether or not it should
* print a logical-OR character ('|') before a string. if_print_or
* simply handles the necessary "if" statement used in many lines
* of this file.
*/
#define print_or(fp,str,orflag) do { \
if (orflag) fputc(fp, '|'); else orflag = true; \
fprintf(fp, str); } \
while (0)
#define if_print_or(fp,i,flag,orflag) do { \
if ((i & flag) == flag) \
print_or(fp,#flag,orflag); } \
while (0)
static const char *
lookup_value(struct name_table *table, uintmax_t val)
{
for (; table->str != NULL; table++)
if (table->val == val)
return (table->str);
return (NULL);
}
/*
* Used when the value maps to a bitmask of #definition values in the
* table. This is a helper routine which outputs a symbolic mask of
* matched masks. Multiple masks are separated by a pipe ('|').
* The value is modified on return to only hold unmatched bits.
*/
static void
print_mask_part(FILE *fp, struct name_table *table, uintmax_t *valp,
bool *printed)
{
uintmax_t rem;
rem = *valp;
for (; table->str != NULL; table++) {
if ((table->val & rem) == table->val) {
/*
* Only print a zero mask if the raw value is
* zero.
*/
if (table->val == 0 && *valp != 0)
continue;
fprintf(fp, "%s%s", *printed ? "|" : "", table->str);
*printed = true;
rem &= ~table->val;
}
}
*valp = rem;
}
/*
* Used when the value maps to a bitmask of #definition values in the
* table. The return value is true if something was printed. If
* rem is not NULL, *rem holds any bits not decoded if something was
* printed. If nothing was printed and rem is not NULL, *rem holds
* the original value.
*/
static bool
print_mask_int(FILE *fp, struct name_table *table, int ival, int *rem)
{
uintmax_t val;
bool printed;
printed = false;
val = (unsigned)ival;
print_mask_part(fp, table, &val, &printed);
if (rem != NULL)
*rem = val;
return (printed);
}
/*
* Used for a mask of optional flags where a value of 0 is valid.
*/
static bool
print_mask_0(FILE *fp, struct name_table *table, int val, int *rem)
{
if (val == 0) {
fputs("0", fp);
if (rem != NULL)
*rem = 0;
return (true);
}
return (print_mask_int(fp, table, val, rem));
}
/*
* Like print_mask_0 but for a unsigned long instead of an int.
*/
static bool
print_mask_0ul(FILE *fp, struct name_table *table, u_long lval, u_long *rem)
{
uintmax_t val;
bool printed;
if (lval == 0) {
fputs("0", fp);
if (rem != NULL)
*rem = 0;
return (true);
}
printed = false;
val = lval;
print_mask_part(fp, table, &val, &printed);
if (rem != NULL)
*rem = val;
return (printed);
}
static void
print_integer(FILE *fp, int val, int base)
{
switch (base) {
case 8:
fprintf(fp, "0%o", val);
break;
case 10:
fprintf(fp, "%d", val);
break;
case 16:
fprintf(fp, "0x%x", val);
break;
default:
abort2("bad base", 0, NULL);
break;
}
}
static bool
print_value(FILE *fp, struct name_table *table, uintmax_t val)
{
const char *str;
str = lookup_value(table, val);
if (str != NULL) {
fputs(str, fp);
return (true);
}
return (false);
}
const char *
sysdecode_atfd(int fd)
{
if (fd == AT_FDCWD)
return ("AT_FDCWD");
return (NULL);
}
static struct name_table semctlops[] = {
X(GETNCNT) X(GETPID) X(GETVAL) X(GETALL) X(GETZCNT) X(SETVAL) X(SETALL)
X(IPC_RMID) X(IPC_SET) X(IPC_STAT) XEND
};
const char *
sysdecode_semctl_cmd(int cmd)
{
return (lookup_value(semctlops, cmd));
}
static struct name_table shmctlops[] = {
X(IPC_RMID) X(IPC_SET) X(IPC_STAT) XEND
};
const char *
sysdecode_shmctl_cmd(int cmd)
{
return (lookup_value(shmctlops, cmd));
}
const char *
sysdecode_msgctl_cmd(int cmd)
{
return (sysdecode_shmctl_cmd(cmd));
}
static struct name_table semgetflags[] = {
X(IPC_CREAT) X(IPC_EXCL) X(SEM_R) X(SEM_A) X((SEM_R>>3)) X((SEM_A>>3))
X((SEM_R>>6)) X((SEM_A>>6)) XEND
};
bool
sysdecode_semget_flags(FILE *fp, int flag, int *rem)
{
return (print_mask_int(fp, semgetflags, flag, rem));
}
static struct name_table idtypes[] = {
X(P_PID) X(P_PPID) X(P_PGID) X(P_SID) X(P_CID) X(P_UID) X(P_GID)
X(P_ALL) X(P_LWPID) X(P_TASKID) X(P_PROJID) X(P_POOLID) X(P_JAILID)
X(P_CTID) X(P_CPUID) X(P_PSETID) XEND
};
/* XXX: idtype is really an idtype_t */
const char *
sysdecode_idtype(int idtype)
{
return (lookup_value(idtypes, idtype));
}
/*
* [g|s]etsockopt's level argument can either be SOL_SOCKET or a
* protocol-specific value.
*/
const char *
sysdecode_sockopt_level(int level)
{
const char *str;
if (level == SOL_SOCKET)
return ("SOL_SOCKET");
/* SOL_* constants for Bluetooth sockets. */
str = lookup_value(ngbtsolevel, level);
if (str != NULL)
return (str);
/*
* IP and Infiniband sockets use IP protocols as levels. Not all
* protocols are valid but it is simpler to just allow all of them.
*
* XXX: IPPROTO_IP == 0, but UNIX domain sockets use a level of 0
* for private options.
*/
str = sysdecode_ipproto(level);
if (str != NULL)
return (str);
return (NULL);
}
bool
sysdecode_vmprot(FILE *fp, int type, int *rem)
{
return (print_mask_int(fp, vmprot, type, rem));
}
static struct name_table sockflags[] = {
X(SOCK_CLOEXEC) X(SOCK_NONBLOCK) XEND
};
bool
sysdecode_socket_type(FILE *fp, int type, int *rem)
{
const char *str;
uintmax_t val;
bool printed;
str = lookup_value(socktype, type & ~(SOCK_CLOEXEC | SOCK_NONBLOCK));
if (str != NULL) {
fputs(str, fp);
*rem = 0;
printed = true;
} else {
*rem = type & ~(SOCK_CLOEXEC | SOCK_NONBLOCK);
printed = false;
}
val = type & (SOCK_CLOEXEC | SOCK_NONBLOCK);
print_mask_part(fp, sockflags, &val, &printed);
return (printed);
}
bool
sysdecode_access_mode(FILE *fp, int mode, int *rem)
{
return (print_mask_int(fp, accessmode, mode, rem));
}
/* XXX: 'type' is really an acl_type_t. */
const char *
sysdecode_acltype(int type)
{
return (lookup_value(acltype, type));
}
bool
sysdecode_cap_fcntlrights(FILE *fp, uint32_t rights, uint32_t *rem)
{
return (print_mask_int(fp, capfcntl, rights, rem));
}
const char *
sysdecode_extattrnamespace(int namespace)
{
return (lookup_value(extattrns, namespace));
}
const char *
sysdecode_fadvice(int advice)
{
return (lookup_value(fadvisebehav, advice));
}
bool
sysdecode_open_flags(FILE *fp, int flags, int *rem)
{
bool printed;
int mode;
uintmax_t val;
mode = flags & O_ACCMODE;
flags &= ~O_ACCMODE;
switch (mode) {
case O_RDONLY:
if (flags & O_EXEC) {
flags &= ~O_EXEC;
fputs("O_EXEC", fp);
} else
fputs("O_RDONLY", fp);
printed = true;
mode = 0;
break;
case O_WRONLY:
fputs("O_WRONLY", fp);
printed = true;
mode = 0;
break;
case O_RDWR:
fputs("O_RDWR", fp);
printed = true;
mode = 0;
break;
default:
printed = false;
}
val = (unsigned)flags;
print_mask_part(fp, openflags, &val, &printed);
if (rem != NULL)
*rem = val | mode;
return (printed);
}
bool
sysdecode_fcntl_fileflags(FILE *fp, int flags, int *rem)
{
bool printed;
int oflags;
/*
* The file flags used with F_GETFL/F_SETFL mostly match the
* flags passed to open(2). However, a few open-only flag
* bits have been repurposed for fcntl-only flags.
*/
oflags = flags & ~(O_NOFOLLOW | FRDAHEAD);
printed = sysdecode_open_flags(fp, oflags, rem);
if (flags & O_NOFOLLOW) {
fprintf(fp, "%sFPOIXSHM", printed ? "|" : "");
printed = true;
}
if (flags & FRDAHEAD) {
fprintf(fp, "%sFRDAHEAD", printed ? "|" : "");
printed = true;
}
return (printed);
}
bool
sysdecode_flock_operation(FILE *fp, int operation, int *rem)
{
return (print_mask_int(fp, flockops, operation, rem));
}
static struct name_table getfsstatmode[] = {
X(MNT_WAIT) X(MNT_NOWAIT) XEND
};
const char *
sysdecode_getfsstat_mode(int mode)
{
return (lookup_value(getfsstatmode, mode));
}
const char *
sysdecode_kldsym_cmd(int cmd)
{
return (lookup_value(kldsymcmd, cmd));
}
const char *
sysdecode_kldunload_flags(int flags)
{
return (lookup_value(kldunloadfflags, flags));
}
const char *
sysdecode_lio_listio_mode(int mode)
{
return (lookup_value(lio_listiomodes, mode));
}
const char *
sysdecode_madvice(int advice)
{
return (lookup_value(madvisebehav, advice));
}
const char *
sysdecode_minherit_inherit(int inherit)
{
return (lookup_value(minheritflags, inherit));
}
bool
sysdecode_mlockall_flags(FILE *fp, int flags, int *rem)
{
return (print_mask_int(fp, mlockallflags, flags, rem));
}
bool
sysdecode_mmap_prot(FILE *fp, int prot, int *rem)
{
return (print_mask_int(fp, mmapprot, prot, rem));
}
bool
sysdecode_fileflags(FILE *fp, fflags_t flags, fflags_t *rem)
{
return (print_mask_0(fp, fileflags, flags, rem));
}
bool
sysdecode_filemode(FILE *fp, int mode, int *rem)
{
return (print_mask_0(fp, filemode, mode, rem));
}
bool
sysdecode_mount_flags(FILE *fp, int flags, int *rem)
{
return (print_mask_int(fp, mountflags, flags, rem));
}
bool
sysdecode_msync_flags(FILE *fp, int flags, int *rem)
{
return (print_mask_int(fp, msyncflags, flags, rem));
}
const char *
sysdecode_nfssvc_flags(int flags)
{
return (lookup_value(nfssvcflags, flags));
}
static struct name_table pipe2flags[] = {
X(O_CLOEXEC) X(O_NONBLOCK) XEND
};
bool
sysdecode_pipe2_flags(FILE *fp, int flags, int *rem)
{
return (print_mask_0(fp, pipe2flags, flags, rem));
}
const char *
sysdecode_prio_which(int which)
{
return (lookup_value(prio, which));
}
const char *
sysdecode_procctl_cmd(int cmd)
{
return (lookup_value(procctlcmd, cmd));
}
const char *
sysdecode_ptrace_request(int request)
{
return (lookup_value(ptraceop, request));
}
static struct name_table quotatypes[] = {
X(GRPQUOTA) X(USRQUOTA) XEND
};
bool
sysdecode_quotactl_cmd(FILE *fp, int cmd)
{
const char *primary, *type;
primary = lookup_value(quotactlcmds, cmd >> SUBCMDSHIFT);
if (primary == NULL)
return (false);
fprintf(fp, "QCMD(%s,", primary);
type = lookup_value(quotatypes, cmd & SUBCMDMASK);
if (type != NULL)
fprintf(fp, "%s", type);
else
fprintf(fp, "%#x", cmd & SUBCMDMASK);
fprintf(fp, ")");
return (true);
}
bool
sysdecode_reboot_howto(FILE *fp, int howto, int *rem)
{
return (print_mask_int(fp, rebootopt, howto, rem));
}
bool
sysdecode_rfork_flags(FILE *fp, int flags, int *rem)
{
return (print_mask_int(fp, rforkflags, flags, rem));
}
const char *
sysdecode_rlimit(int resource)
{
return (lookup_value(rlimit, resource));
}
const char *
sysdecode_scheduler_policy(int policy)
{
return (lookup_value(schedpolicy, policy));
}
bool
sysdecode_sendfile_flags(FILE *fp, int flags, int *rem)
{
return (print_mask_int(fp, sendfileflags, flags, rem));
}
bool
sysdecode_shmat_flags(FILE *fp, int flags, int *rem)
{
return (print_mask_int(fp, shmatflags, flags, rem));
}
const char *
sysdecode_shutdown_how(int how)
{
return (lookup_value(shutdownhow, how));
}
const char *
sysdecode_sigbus_code(int si_code)
{
return (lookup_value(sigbuscode, si_code));
}
const char *
sysdecode_sigchld_code(int si_code)
{
return (lookup_value(sigchldcode, si_code));
}
const char *
sysdecode_sigfpe_code(int si_code)
{
return (lookup_value(sigfpecode, si_code));
}
const char *
sysdecode_sigill_code(int si_code)
{
return (lookup_value(sigillcode, si_code));
}
const char *
sysdecode_sigsegv_code(int si_code)
{
return (lookup_value(sigsegvcode, si_code));
}
const char *
sysdecode_sigtrap_code(int si_code)
{
return (lookup_value(sigtrapcode, si_code));
}
const char *
sysdecode_sigprocmask_how(int how)
{
return (lookup_value(sigprocmaskhow, how));
}
const char *
sysdecode_socketdomain(int domain)
{
return (lookup_value(sockdomain, domain));
}
const char *
sysdecode_sockaddr_family(int sa_family)
{
return (lookup_value(sockfamily, sa_family));
}
const char *
sysdecode_ipproto(int protocol)
{
return (lookup_value(sockipproto, protocol));
}
const char *
sysdecode_sockopt_name(int level, int optname)
{
if (level == SOL_SOCKET)
return (lookup_value(sockopt, optname));
if (level == IPPROTO_IP)
/* XXX: UNIX domain socket options use a level of 0 also. */
return (lookup_value(sockoptip, optname));
if (level == IPPROTO_TCP)
return (lookup_value(sockopttcp, optname));
if (level == IPPROTO_UDP)
return (lookup_value(sockoptudp, optname));
return (NULL);
}
bool
sysdecode_thr_create_flags(FILE *fp, int flags, int *rem)
{
return (print_mask_int(fp, thrcreateflags, flags, rem));
}
const char *
sysdecode_umtx_op(int op)
{
return (lookup_value(umtxop, op));
}
const char *
sysdecode_vmresult(int result)
{
return (lookup_value(vmresult, result));
}
bool
sysdecode_wait4_options(FILE *fp, int options, int *rem)
{
bool printed;
int opt6;
/* A flags value of 0 is normal. */
if (options == 0) {
fputs("0", fp);
if (rem != NULL)
*rem = 0;
return (true);
}
/*
* These flags are implicit and aren't valid flags for wait4()
* directly (though they don't fail with EINVAL).
*/
opt6 = options & (WEXITED | WTRAPPED);
options &= ~opt6;
printed = print_mask_int(fp, wait6opt, options, rem);
if (rem != NULL)
*rem |= opt6;
return (printed);
}
bool
sysdecode_wait6_options(FILE *fp, int options, int *rem)
{
return (print_mask_int(fp, wait6opt, options, rem));
}
const char *
sysdecode_whence(int whence)
{
return (lookup_value(seekwhence, whence));
}
const char *
sysdecode_fcntl_cmd(int cmd)
{
return (lookup_value(fcntlcmd, cmd));
}
static struct name_table fcntl_fd_arg[] = {
X(FD_CLOEXEC) X(0) XEND
};
bool
sysdecode_fcntl_arg_p(int cmd)
{
switch (cmd) {
case F_GETFD:
case F_GETFL:
case F_GETOWN:
return (false);
default:
return (true);
}
}
void
sysdecode_fcntl_arg(FILE *fp, int cmd, uintptr_t arg, int base)
{
int rem;
switch (cmd) {
case F_SETFD:
if (!print_value(fp, fcntl_fd_arg, arg))
print_integer(fp, arg, base);
break;
case F_SETFL:
if (!sysdecode_fcntl_fileflags(fp, arg, &rem))
fprintf(fp, "%#x", rem);
else if (rem != 0)
fprintf(fp, "|%#x", rem);
break;
case F_GETLK:
case F_SETLK:
case F_SETLKW:
fprintf(fp, "%p", (void *)arg);
break;
default:
print_integer(fp, arg, base);
break;
}
}
bool
sysdecode_mmap_flags(FILE *fp, int flags, int *rem)
{
uintmax_t val;
bool printed;
int align;
/*
* MAP_ALIGNED can't be handled directly by print_mask_int().
* MAP_32BIT is also problematic since it isn't defined for
* all platforms.
*/
printed = false;
align = flags & MAP_ALIGNMENT_MASK;
val = (unsigned)flags & ~MAP_ALIGNMENT_MASK;
print_mask_part(fp, mmapflags, &val, &printed);
#ifdef MAP_32BIT
if (val & MAP_32BIT) {
fprintf(fp, "%sMAP_32BIT", printed ? "|" : "");
printed = true;
val &= ~MAP_32BIT;
}
#endif
if (align != 0) {
if (printed)
fputc('|', fp);
if (align == MAP_ALIGNED_SUPER)
fputs("MAP_ALIGNED_SUPER", fp);
else
fprintf(fp, "MAP_ALIGNED(%d)",
align >> MAP_ALIGNMENT_SHIFT);
printed = true;
}
if (rem != NULL)
*rem = val;
return (printed);
}
const char *
sysdecode_rtprio_function(int function)
{
return (lookup_value(rtpriofuncs, function));
}
bool
sysdecode_msg_flags(FILE *fp, int flags, int *rem)
{
return (print_mask_0(fp, msgflags, flags, rem));
}
const char *
sysdecode_sigcode(int sig, int si_code)
{
const char *str;
str = lookup_value(sigcode, si_code);
if (str != NULL)
return (str);
switch (sig) {
case SIGILL:
return (sysdecode_sigill_code(si_code));
case SIGBUS:
return (sysdecode_sigbus_code(si_code));
case SIGSEGV:
return (sysdecode_sigsegv_code(si_code));
case SIGFPE:
return (sysdecode_sigfpe_code(si_code));
case SIGTRAP:
return (sysdecode_sigtrap_code(si_code));
case SIGCHLD:
return (sysdecode_sigchld_code(si_code));
default:
return (NULL);
}
}
bool
sysdecode_umtx_cvwait_flags(FILE *fp, u_long flags, u_long *rem)
{
return (print_mask_0ul(fp, umtxcvwaitflags, flags, rem));
}
bool
sysdecode_umtx_rwlock_flags(FILE *fp, u_long flags, u_long *rem)
{
return (print_mask_0ul(fp, umtxrwlockflags, flags, rem));
}
void
sysdecode_cap_rights(FILE *fp, cap_rights_t *rightsp)
{
struct name_table *t;
bool comma;
comma = false;
for (t = caprights; t->str != NULL; t++) {
if (cap_rights_is_set(rightsp, t->val)) {
fprintf(fp, "%s%s", comma ? "," : "", t->str);
comma = true;
}
}
}
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