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strace/printsiginfo.c
Dmitry V. Levin a8fce09e34 mpers: add support of conditionally compiled printers 
We used to declare and define all printers marked with
MPERS_PRINTER_DECL, including ifdef'ed ones.  That approach left us
no way to conditionally compile mpersified printers, which was not
a problem until btrfs ioctls appeared on the horizon.

With this change, those mpersified printers that are not going
to be compiled are also won't be declared and won't be added to
struct_printers.

This is implemented by filtering all source files containing
MPERS_PRINTER_DECL markers through CPP.  As a nice side effect, this
also lifts an ugly requirement of writing all MPERS_PRINTER_DECL
declarations in a single line.

* README-mpers: Update description of MPERS_PRINTER_DECL syntax.
* defs.h [IN_MPERS_BOOTSTRAP] (MPERS_PRINTER_DECL): Turn into
a recursive variadic macro.
[!IN_MPERS_BOOTSTRAP] (MPERS_PRINTER_DECL): Turn into a variadic macro.
All callers changed.
* Makefile.am (mpers_preproc_files, mpers_printer_decl_pattern):
New variables.
(CLEANFILES): Add $(mpers_preproc_files).
(%.c.mpers.i): New rule.
(printers.h, %_printer_decls.h, %_printer_defs.h): Use
mpers_preproc_files instead of srcdir_mpers_source_files,
use mpers_printer_decl_pattern.
* .gitignore: Add /*.mpers.i.
2016-05-21 22:53:06 +00:00

255 lines
6.3 KiB
C
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/*
* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
* Copyright (c) 1993-1996 Rick Sladkey <jrs@world.std.com>
* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
* Copyright (c) 2001 John Hughes <john@Calva.COM>
* Copyright (c) 2013 Denys Vlasenko <vda.linux@googlemail.com>
* Copyright (c) 2011-2015 Dmitry V. Levin <ldv@altlinux.org>
* Copyright (c) 2015 Elvira Khabirova <lineprinter0@gmail.com>
* 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 DEF_MPERS_TYPE(siginfo_t)
#include <signal.h>
#include <linux/audit.h>
#include MPERS_DEFS
#ifndef IN_MPERS
#include "printsiginfo.h"
#endif
#include "xlat/audit_arch.h"
#include "xlat/sigbus_codes.h"
#include "xlat/sigchld_codes.h"
#include "xlat/sigfpe_codes.h"
#include "xlat/sigill_codes.h"
#include "xlat/siginfo_codes.h"
#include "xlat/sigpoll_codes.h"
#include "xlat/sigprof_codes.h"
#include "xlat/sigsegv_codes.h"
#include "xlat/sigsys_codes.h"
#include "xlat/sigtrap_codes.h"
#ifdef SIGEMT
# include "xlat/sigemt_codes.h"
#endif
#ifndef SI_FROMUSER
# define SI_FROMUSER(sip) ((sip)->si_code <= 0)
#endif
static void
printsigsource(const siginfo_t *sip)
{
tprintf(", si_pid=%u, si_uid=%u",
(unsigned int) sip->si_pid,
(unsigned int) sip->si_uid);
}
static void
printsigval(const siginfo_t *sip)
{
tprintf(", si_value={int=%d, ptr=%#lx}",
sip->si_int, (unsigned long) sip->si_ptr);
}
static void
print_si_code(int si_signo, unsigned int si_code)
{
const char *code = xlookup(siginfo_codes, si_code);
if (!code) {
switch (si_signo) {
case SIGTRAP:
code = xlookup(sigtrap_codes, si_code);
break;
case SIGCHLD:
code = xlookup(sigchld_codes, si_code);
break;
case SIGPOLL:
code = xlookup(sigpoll_codes, si_code);
break;
case SIGPROF:
code = xlookup(sigprof_codes, si_code);
break;
case SIGILL:
code = xlookup(sigill_codes, si_code);
break;
#ifdef SIGEMT
case SIGEMT:
code = xlookup(sigemt_codes, si_code);
break;
#endif
case SIGFPE:
code = xlookup(sigfpe_codes, si_code);
break;
case SIGSEGV:
code = xlookup(sigsegv_codes, si_code);
break;
case SIGBUS:
code = xlookup(sigbus_codes, si_code);
break;
case SIGSYS:
code = xlookup(sigsys_codes, si_code);
break;
}
}
if (code)
tprints(code);
else
tprintf("%#x", si_code);
}
static void
print_si_info(const siginfo_t *sip)
{
if (sip->si_errno) {
tprints(", si_errno=");
if ((unsigned) sip->si_errno < nerrnos
&& errnoent[sip->si_errno])
tprints(errnoent[sip->si_errno]);
else
tprintf("%d", sip->si_errno);
}
if (SI_FROMUSER(sip)) {
switch (sip->si_code) {
case SI_USER:
printsigsource(sip);
break;
case SI_TKILL:
printsigsource(sip);
break;
#if defined HAVE_SIGINFO_T_SI_TIMERID && defined HAVE_SIGINFO_T_SI_OVERRUN
case SI_TIMER:
tprintf(", si_timerid=%#x, si_overrun=%d",
sip->si_timerid, sip->si_overrun);
printsigval(sip);
break;
#endif
default:
printsigsource(sip);
if (sip->si_ptr)
printsigval(sip);
break;
}
} else {
switch (sip->si_signo) {
case SIGCHLD:
printsigsource(sip);
tprints(", si_status=");
if (sip->si_code == CLD_EXITED)
tprintf("%d", sip->si_status);
else
printsignal(sip->si_status);
tprintf(", si_utime=%llu, si_stime=%llu",
(unsigned long long) sip->si_utime,
(unsigned long long) sip->si_stime);
break;
case SIGILL: case SIGFPE:
case SIGSEGV: case SIGBUS:
tprintf(", si_addr=%#lx",
(unsigned long) sip->si_addr);
break;
case SIGPOLL:
switch (sip->si_code) {
case POLL_IN: case POLL_OUT: case POLL_MSG:
tprintf(", si_band=%ld",
(long) sip->si_band);
break;
}
break;
#ifdef HAVE_SIGINFO_T_SI_SYSCALL
case SIGSYS:
tprintf(", si_call_addr=%#lx, si_syscall=__NR_%s, si_arch=",
(unsigned long) sip->si_call_addr,
syscall_name((unsigned) sip->si_syscall));
printxval(audit_arch, sip->si_arch, "AUDIT_ARCH_???");
break;
#endif
default:
if (sip->si_pid || sip->si_uid)
printsigsource(sip);
if (sip->si_ptr)
printsigval(sip);
}
}
}
#ifdef IN_MPERS
static
#endif
void
printsiginfo(const siginfo_t *sip)
{
if (sip->si_signo == 0) {
tprints("{}");
return;
}
tprints("{si_signo=");
printsignal(sip->si_signo);
tprints(", si_code=");
print_si_code(sip->si_signo, sip->si_code);
#ifdef SI_NOINFO
if (sip->si_code != SI_NOINFO)
#endif
print_si_info(sip);
tprints("}");
}
MPERS_PRINTER_DECL(void, printsiginfo_at,
struct tcb *tcp, long addr)
{
siginfo_t si;
if (!umove_or_printaddr(tcp, addr, &si))
printsiginfo(&si);
}
static bool
print_siginfo_t(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
{
printsiginfo((const siginfo_t *) elem_buf);
return true;
}
MPERS_PRINTER_DECL(void, print_siginfo_array,
struct tcb *tcp, unsigned long addr, unsigned long len)
{
siginfo_t si;
print_array(tcp, addr, len, &si, sizeof(si),
umoven_or_printaddr, print_siginfo_t, 0);
}
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