4c9ed3f146
Extend the range of injected return value to the maximum, print warnings if negative injection value can be clipped in compat personality or can inadvertently turn into a fault injection. * defs.h (INJECT_F_ERROR): New macro. * filter_qualify.c (parse_inject_token): Revert type of intval local variable back to int, check INJECT_F_ERROR along with INJECT_F_RETVAL, use strtoull to parse retval argument, print warnings in case of retval clipping and inadvertent fault injection. (qualify_inject_common): Set INJECT_F_ERROR instead of INJECT_F_RETVAL. * syscall.c (tamper_with_syscall_exiting): Check inject_data.flags to determine whether a fault injection or retval injection has to be performed. (syscall_exiting_trace) <case RVAL_DECIMAL>: Explicitly print tcp->u_rval as int if current_klongsize < sizeof(tcp->u_rval). * tests/inject-nf.c (main): Update. * tests/inject-nf.test: Test injection of negative return values. * tests/qual_inject-syntax.test: Remove retval=-1 check as it is now allowed, add checks for invalid retval parameters. Co-Authored-by: Dmitry V. Levin <ldv@altlinux.org>
1071 lines
35 KiB
C
1071 lines
35 KiB
C
/*
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* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
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* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
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* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
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* Copyright (c) 2001-2018 The strace developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef STRACE_DEFS_H
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#define STRACE_DEFS_H
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <features.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <inttypes.h>
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#include <sys/types.h>
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#include <stddef.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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/* Open-coding isprint(ch) et al proved more efficient than calling
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* generalized libc interface. We don't *want* to do non-ASCII anyway.
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*/
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/* #include <ctype.h> */
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#include <string.h>
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#include <errno.h>
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#include <time.h>
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#include <sys/time.h>
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#include "arch_defs.h"
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#include "error_prints.h"
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#include "gcc_compat.h"
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#include "kernel_types.h"
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#include "macros.h"
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#include "mpers_type.h"
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#include "string_to_uint.h"
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#include "sysent.h"
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#include "xmalloc.h"
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#ifndef HAVE_STRERROR
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const char *strerror(int);
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#endif
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#ifndef HAVE_STPCPY
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/* Some libc have stpcpy, some don't. Sigh...
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* Roll our private implementation...
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*/
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#undef stpcpy
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#define stpcpy strace_stpcpy
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extern char *stpcpy(char *dst, const char *src);
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#endif
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/* Glibc has an efficient macro for sigemptyset
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* (it just does one or two assignments of 0 to internal vector of longs).
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*/
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#if defined(__GLIBC__) && defined(__sigemptyset) && !defined(sigemptyset)
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# define sigemptyset __sigemptyset
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#endif
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/* Configuration section */
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#ifndef DEFAULT_STRLEN
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/* default maximum # of bytes printed in `printstr', change with -s switch */
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# define DEFAULT_STRLEN 32
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#endif
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#ifndef DEFAULT_ACOLUMN
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# define DEFAULT_ACOLUMN 40 /* default alignment column for results */
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#endif
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/*
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* Maximum number of args to a syscall.
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*
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* Make sure that all entries in all syscallent.h files have nargs <= MAX_ARGS!
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* linux/<ARCH>/syscallent*.h:
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* all have nargs <= 6 except mips o32 which has nargs <= 7.
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*/
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#ifndef MAX_ARGS
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# ifdef LINUX_MIPSO32
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# define MAX_ARGS 7
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# else
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# define MAX_ARGS 6
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# endif
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#endif
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/* default sorting method for call profiling */
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#ifndef DEFAULT_SORTBY
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# define DEFAULT_SORTBY "time"
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#endif
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/* To force NOMMU build, set to 1 */
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#define NOMMU_SYSTEM 0
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#ifndef ERESTARTSYS
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# define ERESTARTSYS 512
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#endif
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#ifndef ERESTARTNOINTR
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# define ERESTARTNOINTR 513
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#endif
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#ifndef ERESTARTNOHAND
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# define ERESTARTNOHAND 514
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#endif
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#ifndef ERESTART_RESTARTBLOCK
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# define ERESTART_RESTARTBLOCK 516
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#endif
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#define PERSONALITY0_WORDSIZE SIZEOF_LONG
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#define PERSONALITY0_KLONGSIZE SIZEOF_KERNEL_LONG_T
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#define PERSONALITY0_INCLUDE_PRINTERS_DECLS "native_printer_decls.h"
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#define PERSONALITY0_INCLUDE_PRINTERS_DEFS "native_printer_defs.h"
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#if SUPPORTED_PERSONALITIES > 1
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# define PERSONALITY1_WORDSIZE 4
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# define PERSONALITY1_KLONGSIZE PERSONALITY1_WORDSIZE
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#endif
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#if SUPPORTED_PERSONALITIES > 2
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# define PERSONALITY2_WORDSIZE 4
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# define PERSONALITY2_KLONGSIZE PERSONALITY0_KLONGSIZE
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#endif
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#if SUPPORTED_PERSONALITIES > 1 && defined HAVE_M32_MPERS
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# define PERSONALITY1_INCLUDE_PRINTERS_DECLS "m32_printer_decls.h"
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# define PERSONALITY1_INCLUDE_PRINTERS_DEFS "m32_printer_defs.h"
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# define PERSONALITY1_INCLUDE_FUNCS "m32_funcs.h"
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# define MPERS_m32_IOCTL_MACROS "ioctl_redefs1.h"
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# define HAVE_PERSONALITY_1_MPERS 1
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#else
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# define PERSONALITY1_INCLUDE_PRINTERS_DECLS "native_printer_decls.h"
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# define PERSONALITY1_INCLUDE_PRINTERS_DEFS "native_printer_defs.h"
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# define PERSONALITY1_INCLUDE_FUNCS "empty.h"
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# define HAVE_PERSONALITY_1_MPERS 0
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#endif
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#if SUPPORTED_PERSONALITIES > 2 && defined HAVE_MX32_MPERS
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# define PERSONALITY2_INCLUDE_FUNCS "mx32_funcs.h"
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# define PERSONALITY2_INCLUDE_PRINTERS_DECLS "mx32_printer_decls.h"
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# define PERSONALITY2_INCLUDE_PRINTERS_DEFS "mx32_printer_defs.h"
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# define MPERS_mx32_IOCTL_MACROS "ioctl_redefs2.h"
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# define HAVE_PERSONALITY_2_MPERS 1
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#else
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# define PERSONALITY2_INCLUDE_PRINTERS_DECLS "native_printer_decls.h"
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# define PERSONALITY2_INCLUDE_PRINTERS_DEFS "native_printer_defs.h"
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# define PERSONALITY2_INCLUDE_FUNCS "empty.h"
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# define HAVE_PERSONALITY_2_MPERS 0
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#endif
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typedef struct ioctlent {
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const char *symbol;
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unsigned int code;
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} struct_ioctlent;
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#define INJECT_F_SIGNAL 0x01
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#define INJECT_F_ERROR 0x02
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#define INJECT_F_RETVAL 0x04
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#define INJECT_F_DELAY_ENTER 0x08
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#define INJECT_F_DELAY_EXIT 0x10
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struct inject_data {
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uint8_t flags; /* 5 of 8 flags are used so far */
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uint8_t signo; /* NSIG <= 128 */
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uint16_t rval_idx; /* index in retval_vec */
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uint16_t delay_idx; /* index in delay_data_vec */
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};
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struct inject_opts {
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uint16_t first;
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uint16_t step;
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struct inject_data data;
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};
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#define MAX_ERRNO_VALUE 4095
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/* Trace Control Block */
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struct tcb {
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int flags; /* See below for TCB_ values */
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int pid; /* If 0, this tcb is free */
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int qual_flg; /* qual_flags[scno] or DEFAULT_QUAL_FLAGS + RAW */
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unsigned long u_error; /* Error code */
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kernel_ulong_t scno; /* System call number */
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kernel_ulong_t u_arg[MAX_ARGS]; /* System call arguments */
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kernel_long_t u_rval; /* Return value */
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#if SUPPORTED_PERSONALITIES > 1
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unsigned int currpers; /* Personality at the time of scno update */
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#endif
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int sys_func_rval; /* Syscall entry parser's return value */
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int curcol; /* Output column for this process */
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FILE *outf; /* Output file for this process */
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const char *auxstr; /* Auxiliary info from syscall (see RVAL_STR) */
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void *_priv_data; /* Private data for syscall decoding functions */
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void (*_free_priv_data)(void *); /* Callback for freeing priv_data */
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const struct_sysent *s_ent; /* sysent[scno] or dummy struct for bad scno */
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const struct_sysent *s_prev_ent; /* for "resuming interrupted SYSCALL" msg */
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struct inject_opts *inject_vec[SUPPORTED_PERSONALITIES];
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struct timespec stime; /* System time usage as of last process wait */
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struct timespec dtime; /* Delta for system time usage */
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struct timespec etime; /* Syscall entry time */
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struct timespec delay_expiration_time; /* When does the delay end */
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struct mmap_cache_t *mmap_cache;
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unsigned int mmap_cache_size;
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unsigned int mmap_cache_generation;
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#ifdef USE_LIBUNWIND
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struct UPT_info *libunwind_ui;
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struct queue_t *queue;
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#endif
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};
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/* TCB flags */
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/* We have attached to this process, but did not see it stopping yet */
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#define TCB_STARTUP 0x01
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#define TCB_IGNORE_ONE_SIGSTOP 0x02 /* Next SIGSTOP is to be ignored */
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/*
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* Are we in system call entry or in syscall exit?
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*
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* This bit is set in syscall_entering_finish() and cleared in
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* syscall_exiting_finish().
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* Other stops which are possible directly after syscall entry (death, ptrace
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* event stop) are handled without calling syscall_{entering,exiting}_*().
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*
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* Use entering(tcp) / exiting(tcp) to check this bit to make code more
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* readable.
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*/
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#define TCB_INSYSCALL 0x04
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#define TCB_ATTACHED 0x08 /* We attached to it already */
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#define TCB_REPRINT 0x10 /* We should reprint this syscall on exit */
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#define TCB_FILTERED 0x20 /* This system call has been filtered out */
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#define TCB_TAMPERED 0x40 /* A syscall has been tampered with */
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#define TCB_HIDE_LOG 0x80 /* We should hide everything (until execve) */
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#define TCB_SKIP_DETACH_ON_FIRST_EXEC 0x100 /* -b execve should skip detach on first execve */
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#define TCB_GRABBED 0x200 /* We grab the process and can catch it
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* in the middle of a syscall */
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#define TCB_RECOVERING 0x400 /* We try to recover after detecting incorrect
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* syscall entering/exiting state */
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#define TCB_INJECT_DELAY_EXIT 0x800 /* Current syscall needs to be delayed
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on exit */
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#define TCB_DELAYED 0x1000 /* Current syscall has been delayed */
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/* qualifier flags */
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#define QUAL_TRACE 0x001 /* this system call should be traced */
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#define QUAL_ABBREV 0x002 /* abbreviate the structures of this syscall */
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#define QUAL_VERBOSE 0x004 /* decode the structures of this syscall */
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#define QUAL_RAW 0x008 /* print all args in hex for this syscall */
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#define QUAL_INJECT 0x010 /* tamper with this system call on purpose */
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#define DEFAULT_QUAL_FLAGS (QUAL_TRACE | QUAL_ABBREV | QUAL_VERBOSE)
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#define entering(tcp) (!((tcp)->flags & TCB_INSYSCALL))
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#define exiting(tcp) ((tcp)->flags & TCB_INSYSCALL)
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#define syserror(tcp) ((tcp)->u_error != 0)
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#define traced(tcp) ((tcp)->qual_flg & QUAL_TRACE)
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#define verbose(tcp) ((tcp)->qual_flg & QUAL_VERBOSE)
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#define abbrev(tcp) ((tcp)->qual_flg & QUAL_ABBREV)
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#define raw(tcp) ((tcp)->qual_flg & QUAL_RAW)
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#define inject(tcp) ((tcp)->qual_flg & QUAL_INJECT)
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#define filtered(tcp) ((tcp)->flags & TCB_FILTERED)
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#define hide_log(tcp) ((tcp)->flags & TCB_HIDE_LOG)
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#define syscall_tampered(tcp) ((tcp)->flags & TCB_TAMPERED)
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#define recovering(tcp) ((tcp)->flags & TCB_RECOVERING)
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#define inject_delay_exit(tcp) ((tcp)->flags & TCB_INJECT_DELAY_EXIT)
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#define syscall_delayed(tcp) ((tcp)->flags & TCB_DELAYED)
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#include "xlat.h"
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extern const struct xlat addrfams[];
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extern const struct xlat arp_hardware_types[];
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extern const struct xlat at_flags[];
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extern const struct xlat clocknames[];
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extern const struct xlat dirent_types[];
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/** Ethernet protocols list, sorted and unterminated, defined in sockaddr.c. */
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extern const struct xlat ethernet_protocols[];
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/** Ethernet protocols array size without terminating record. */
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extern const size_t ethernet_protocols_size;
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extern const struct xlat evdev_abs[];
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extern const struct xlat iffflags[];
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extern const struct xlat inet_protocols[];
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extern const struct xlat ip_type_of_services[];
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extern const struct xlat msg_flags[];
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extern const struct xlat netlink_protocols[];
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extern const struct xlat nl_netfilter_msg_types[];
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extern const struct xlat nl_route_types[];
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extern const struct xlat open_access_modes[];
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extern const struct xlat open_mode_flags[];
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extern const struct xlat resource_flags[];
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extern const struct xlat routing_scopes[];
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extern const struct xlat routing_table_ids[];
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extern const struct xlat routing_types[];
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extern const struct xlat seccomp_filter_flags[];
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extern const struct xlat seccomp_ret_action[];
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extern const struct xlat setns_types[];
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extern const struct xlat sg_io_info[];
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extern const struct xlat socketlayers[];
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extern const struct xlat socktypes[];
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extern const struct xlat tcp_state_flags[];
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extern const struct xlat tcp_states[];
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extern const struct xlat whence_codes[];
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/* Format of syscall return values */
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#define RVAL_DECIMAL 000 /* decimal format */
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#define RVAL_HEX 001 /* hex format */
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#define RVAL_OCTAL 002 /* octal format */
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#define RVAL_UDECIMAL 003 /* unsigned decimal format */
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#define RVAL_FD 010 /* file descriptor */
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#define RVAL_MASK 013 /* mask for these values */
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#define RVAL_STR 020 /* Print `auxstr' field after return val */
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#define RVAL_NONE 040 /* Print nothing */
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#define RVAL_DECODED 0100 /* syscall decoding finished */
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#define RVAL_IOCTL_DECODED 0200 /* ioctl sub-parser successfully decoded
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the argument */
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#define RVAL_PRINT_ERR_VAL 0400 /* Print decoded error code along with
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syscall return value. Needed for modify_ldt
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that for some reason decides to return
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an error with higher bits set to 0. */
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#define IOCTL_NUMBER_UNKNOWN 0
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#define IOCTL_NUMBER_HANDLED 1
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#define IOCTL_NUMBER_STOP_LOOKUP 010
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#define indirect_ipccall(tcp) (tcp->s_ent->sys_flags & TRACE_INDIRECT_SUBCALL)
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enum sock_proto {
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SOCK_PROTO_UNKNOWN,
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SOCK_PROTO_UNIX,
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SOCK_PROTO_TCP,
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SOCK_PROTO_UDP,
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SOCK_PROTO_TCPv6,
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SOCK_PROTO_UDPv6,
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SOCK_PROTO_NETLINK
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};
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extern enum sock_proto get_proto_by_name(const char *);
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enum iov_decode {
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IOV_DECODE_ADDR,
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IOV_DECODE_STR,
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IOV_DECODE_NETLINK
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};
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typedef enum {
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CFLAG_NONE = 0,
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CFLAG_ONLY_STATS,
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CFLAG_BOTH
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} cflag_t;
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extern cflag_t cflag;
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extern bool Tflag;
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extern bool iflag;
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extern bool count_wallclock;
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extern unsigned int qflag;
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extern bool not_failing_only;
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extern unsigned int show_fd_path;
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/* are we filtering traces based on paths? */
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extern struct path_set {
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const char **paths_selected;
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size_t num_selected;
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size_t size;
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} global_path_set;
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#define tracing_paths (global_path_set.num_selected != 0)
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extern unsigned xflag;
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extern unsigned followfork;
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#ifdef USE_LIBUNWIND
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/* if this is true do the stack trace for every system call */
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extern bool stack_trace_enabled;
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#endif
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extern unsigned ptrace_setoptions;
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extern unsigned max_strlen;
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extern unsigned os_release;
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#undef KERNEL_VERSION
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#define KERNEL_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c))
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extern int read_int_from_file(struct tcb *, const char *, int *);
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extern void set_sortby(const char *);
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extern void set_overhead(int);
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extern void print_pc(struct tcb *);
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extern int syscall_entering_decode(struct tcb *);
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extern int syscall_entering_trace(struct tcb *, unsigned int *);
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extern void syscall_entering_finish(struct tcb *, int);
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extern int syscall_exiting_decode(struct tcb *, struct timespec *);
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extern int syscall_exiting_trace(struct tcb *, struct timespec *, int);
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extern void syscall_exiting_finish(struct tcb *);
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extern void count_syscall(struct tcb *, const struct timespec *);
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extern void call_summary(FILE *);
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extern void clear_regs(struct tcb *tcp);
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extern int get_scno(struct tcb *);
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extern kernel_ulong_t get_rt_sigframe_addr(struct tcb *);
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/**
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* Convert a (shuffled) syscall number to the corresponding syscall name.
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*
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* @param scno Syscall number.
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* @return String literal corresponding to the syscall number in case latter
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* is valid; NULL otherwise.
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*/
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extern const char *syscall_name(kernel_ulong_t scno);
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/**
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* Convert a syscall name to the corresponding (shuffled) syscall number.
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*
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* @param s Syscall name.
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* @param p Personality.
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* @param start From which position in syscall entry table resume the search.
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* @return Shuffled syscall number (ready to use against sysent_vec)
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* if syscall name is found; -1 otherwise.
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*/
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extern kernel_long_t scno_by_name(const char *s, unsigned p,
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kernel_long_t start);
|
|
/**
|
|
* Shuffle syscall numbers so that we don't have huge gaps in syscall table.
|
|
* The shuffling should be an involution: shuffle_scno(shuffle_scno(n)) == n.
|
|
*
|
|
* @param scno Raw or shuffled syscall number.
|
|
* @return Shuffled or raw syscall number, respectively.
|
|
*/
|
|
extern kernel_ulong_t shuffle_scno(kernel_ulong_t scno);
|
|
extern const char *err_name(unsigned long err);
|
|
|
|
extern bool is_erestart(struct tcb *);
|
|
extern void temporarily_clear_syserror(struct tcb *);
|
|
extern void restore_cleared_syserror(struct tcb *);
|
|
|
|
extern void *get_tcb_priv_data(const struct tcb *);
|
|
extern int set_tcb_priv_data(struct tcb *, void *priv_data,
|
|
void (*free_priv_data)(void *));
|
|
extern void free_tcb_priv_data(struct tcb *);
|
|
|
|
static inline unsigned long get_tcb_priv_ulong(const struct tcb *tcp)
|
|
{
|
|
return (unsigned long) get_tcb_priv_data(tcp);
|
|
}
|
|
|
|
static inline int set_tcb_priv_ulong(struct tcb *tcp, unsigned long val)
|
|
{
|
|
return set_tcb_priv_data(tcp, (void *) val, 0);
|
|
}
|
|
|
|
extern int
|
|
umoven(struct tcb *, kernel_ulong_t addr, unsigned int len, void *laddr);
|
|
#define umove(pid, addr, objp) \
|
|
umoven((pid), (addr), sizeof(*(objp)), (void *) (objp))
|
|
|
|
extern int
|
|
umoven_or_printaddr(struct tcb *, kernel_ulong_t addr,
|
|
unsigned int len, void *laddr);
|
|
#define umove_or_printaddr(pid, addr, objp) \
|
|
umoven_or_printaddr((pid), (addr), sizeof(*(objp)), (void *) (objp))
|
|
|
|
extern int
|
|
umoven_or_printaddr_ignore_syserror(struct tcb *, kernel_ulong_t addr,
|
|
unsigned int len, void *laddr);
|
|
|
|
extern int
|
|
umovestr(struct tcb *, kernel_ulong_t addr, unsigned int len, char *laddr);
|
|
|
|
extern int upeek(struct tcb *tcp, unsigned long, kernel_ulong_t *);
|
|
extern int upoke(struct tcb *tcp, unsigned long, kernel_ulong_t);
|
|
|
|
extern bool
|
|
print_array(struct tcb *,
|
|
kernel_ulong_t start_addr,
|
|
size_t nmemb,
|
|
void *elem_buf,
|
|
size_t elem_size,
|
|
int (*umoven_func)(struct tcb *,
|
|
kernel_ulong_t,
|
|
unsigned int,
|
|
void *),
|
|
bool (*print_func)(struct tcb *,
|
|
void *elem_buf,
|
|
size_t elem_size,
|
|
void *opaque_data),
|
|
void *opaque_data);
|
|
|
|
#if HAVE_ARCH_GETRVAL2
|
|
extern long getrval2(struct tcb *);
|
|
#endif
|
|
|
|
extern const char *signame(const int);
|
|
extern void pathtrace_select_set(const char *, struct path_set *);
|
|
extern bool pathtrace_match_set(struct tcb *, struct path_set *);
|
|
#define pathtrace_select(tcp) \
|
|
pathtrace_select_set(tcp, &global_path_set)
|
|
#define pathtrace_match(tcp) \
|
|
pathtrace_match_set(tcp, &global_path_set)
|
|
extern int getfdpath(struct tcb *, int, char *, unsigned);
|
|
extern unsigned long getfdinode(struct tcb *, int);
|
|
extern enum sock_proto getfdproto(struct tcb *, int);
|
|
|
|
extern const char *xlookup(const struct xlat *, const uint64_t);
|
|
extern const char *xlat_search(const struct xlat *, const size_t, const uint64_t);
|
|
|
|
struct dyxlat;
|
|
struct dyxlat *dyxlat_alloc(size_t nmemb);
|
|
void dyxlat_free(struct dyxlat *);
|
|
const struct xlat *dyxlat_get(const struct dyxlat *);
|
|
void dyxlat_add_pair(struct dyxlat *, uint64_t val, const char *str, size_t len);
|
|
|
|
const struct xlat *genl_families_xlat(struct tcb *tcp);
|
|
|
|
extern unsigned long get_pagesize(void);
|
|
extern int next_set_bit(const void *bit_array, unsigned cur_bit, unsigned size_bits);
|
|
|
|
/*
|
|
* Returns STR if it does not start with PREFIX,
|
|
* or a pointer to the first char in STR after PREFIX.
|
|
* The length of PREFIX is specified by PREFIX_LEN.
|
|
*/
|
|
static inline const char *
|
|
str_strip_prefix_len(const char *str, const char *prefix, size_t prefix_len)
|
|
{
|
|
return strncmp(str, prefix, prefix_len) ? str : str + prefix_len;
|
|
}
|
|
|
|
#define STR_STRIP_PREFIX(str, prefix) \
|
|
str_strip_prefix_len((str), (prefix), sizeof(prefix) - 1)
|
|
|
|
#define QUOTE_0_TERMINATED 0x01
|
|
#define QUOTE_OMIT_LEADING_TRAILING_QUOTES 0x02
|
|
#define QUOTE_OMIT_TRAILING_0 0x08
|
|
#define QUOTE_FORCE_HEX 0x10
|
|
#define QUOTE_EMIT_COMMENT 0x20
|
|
|
|
extern int string_quote(const char *, char *, unsigned int, unsigned int,
|
|
const char *escape_chars);
|
|
extern int print_quoted_string_ex(const char *, unsigned int, unsigned int,
|
|
const char *escape_chars);
|
|
extern int print_quoted_string(const char *, unsigned int, unsigned int);
|
|
extern int print_quoted_cstring(const char *, unsigned int);
|
|
|
|
/* a refers to the lower numbered u_arg,
|
|
* b refers to the higher numbered u_arg
|
|
*/
|
|
#ifdef WORDS_BIGENDIAN
|
|
# define ULONG_LONG(a, b) \
|
|
((unsigned long long)(unsigned)(b) | ((unsigned long long)(a)<<32))
|
|
#else
|
|
# define ULONG_LONG(a, b) \
|
|
((unsigned long long)(unsigned)(a) | ((unsigned long long)(b)<<32))
|
|
#endif
|
|
extern int getllval(struct tcb *, unsigned long long *, int);
|
|
extern int printllval(struct tcb *, const char *, int)
|
|
ATTRIBUTE_FORMAT((printf, 2, 0));
|
|
|
|
extern void printaddr64(uint64_t addr);
|
|
extern void printaddr(kernel_ulong_t addr);
|
|
extern int printxvals(const uint64_t, const char *, const struct xlat *, ...)
|
|
ATTRIBUTE_SENTINEL;
|
|
extern int printxval_searchn(const struct xlat *xlat, size_t xlat_size,
|
|
uint64_t val, const char *dflt);
|
|
/**
|
|
* Wrapper around printxval_searchn that passes ARRAY_SIZE - 1
|
|
* as the array size, as all arrays are XLAT_END-terminated and
|
|
* printxval_searchn expects a size without the terminating record.
|
|
*/
|
|
#define printxval_search(xlat__, val__, dflt__) \
|
|
printxval_searchn(xlat__, ARRAY_SIZE(xlat__) - 1, val__, dflt__)
|
|
extern int sprintxval(char *buf, size_t size, const struct xlat *,
|
|
unsigned int val, const char *dflt);
|
|
extern int printargs(struct tcb *);
|
|
extern int printargs_u(struct tcb *);
|
|
extern int printargs_d(struct tcb *);
|
|
|
|
extern void addflags(const struct xlat *, uint64_t);
|
|
extern int printflags_ex(uint64_t, const char *, const struct xlat *, ...)
|
|
ATTRIBUTE_SENTINEL;
|
|
extern const char *sprintflags(const char *, const struct xlat *, uint64_t);
|
|
extern const char *sprinttime(long long sec);
|
|
extern const char *sprinttime_nsec(long long sec, unsigned long long nsec);
|
|
extern const char *sprinttime_usec(long long sec, unsigned long long usec);
|
|
extern void print_symbolic_mode_t(unsigned int);
|
|
extern void print_numeric_umode_t(unsigned short);
|
|
extern void print_numeric_long_umask(unsigned long);
|
|
extern void print_dev_t(unsigned long long dev);
|
|
extern void print_abnormal_hi(kernel_ulong_t);
|
|
|
|
extern kernel_ulong_t *
|
|
fetch_indirect_syscall_args(struct tcb *, kernel_ulong_t addr, unsigned int n_args);
|
|
|
|
extern void
|
|
dumpiov_in_msghdr(struct tcb *, kernel_ulong_t addr, kernel_ulong_t data_size);
|
|
|
|
extern void
|
|
dumpiov_in_mmsghdr(struct tcb *, kernel_ulong_t addr);
|
|
|
|
extern void
|
|
dumpiov_upto(struct tcb *, int len, kernel_ulong_t addr, kernel_ulong_t data_size);
|
|
|
|
extern void
|
|
dumpstr(struct tcb *, kernel_ulong_t addr, int len);
|
|
|
|
extern int
|
|
printstr_ex(struct tcb *, kernel_ulong_t addr, kernel_ulong_t len,
|
|
unsigned int user_style);
|
|
|
|
extern int
|
|
printpathn(struct tcb *, kernel_ulong_t addr, unsigned int n);
|
|
|
|
extern int
|
|
printpath(struct tcb *, kernel_ulong_t addr);
|
|
|
|
#define TIMESPEC_TEXT_BUFSIZE \
|
|
(sizeof(long long) * 3 * 2 + sizeof("{tv_sec=-, tv_nsec=}"))
|
|
extern void printfd(struct tcb *, int);
|
|
extern void print_sockaddr(const void *sa, int len);
|
|
extern bool
|
|
print_inet_addr(int af, const void *addr, unsigned int len, const char *var_name);
|
|
extern bool
|
|
decode_inet_addr(struct tcb *, kernel_ulong_t addr,
|
|
unsigned int len, int family, const char *var_name);
|
|
extern const char *get_sockaddr_by_inode(struct tcb *, int fd, unsigned long inode);
|
|
extern bool print_sockaddr_by_inode(struct tcb *, int fd, unsigned long inode);
|
|
extern void print_dirfd(struct tcb *, int);
|
|
|
|
extern int
|
|
decode_sockaddr(struct tcb *, kernel_ulong_t addr, int addrlen);
|
|
|
|
extern void printuid(const char *, const unsigned int);
|
|
|
|
extern void
|
|
print_sigset_addr_len(struct tcb *, kernel_ulong_t addr, kernel_ulong_t len);
|
|
extern void
|
|
print_sigset_addr(struct tcb *, kernel_ulong_t addr);
|
|
|
|
extern const char *sprintsigmask_n(const char *, const void *, unsigned int);
|
|
#define tprintsigmask_addr(prefix, mask) \
|
|
tprints(sprintsigmask_n((prefix), (mask), sizeof(mask)))
|
|
extern void printsignal(int);
|
|
|
|
extern void
|
|
tprint_iov_upto(struct tcb *, kernel_ulong_t len, kernel_ulong_t addr,
|
|
enum iov_decode, kernel_ulong_t data_size);
|
|
|
|
extern void
|
|
decode_netlink(struct tcb *, int fd, kernel_ulong_t addr, kernel_ulong_t len);
|
|
|
|
extern void tprint_open_modes(unsigned int);
|
|
extern const char *sprint_open_modes(unsigned int);
|
|
|
|
extern void
|
|
decode_seccomp_fprog(struct tcb *, kernel_ulong_t addr);
|
|
|
|
extern void
|
|
print_seccomp_fprog(struct tcb *, kernel_ulong_t addr, unsigned short len);
|
|
|
|
extern void
|
|
decode_sock_fprog(struct tcb *, kernel_ulong_t addr);
|
|
|
|
extern void
|
|
print_sock_fprog(struct tcb *, kernel_ulong_t addr, unsigned short len);
|
|
|
|
struct strace_stat;
|
|
extern void print_struct_stat(struct tcb *, const struct strace_stat *const st);
|
|
|
|
struct strace_statfs;
|
|
struct strace_keyctl_kdf_params;
|
|
|
|
extern void
|
|
print_struct_statfs(struct tcb *, kernel_ulong_t addr);
|
|
|
|
extern void
|
|
print_struct_statfs64(struct tcb *, kernel_ulong_t addr, kernel_ulong_t size);
|
|
|
|
extern void print_ifindex(unsigned int);
|
|
|
|
extern void qualify(const char *);
|
|
extern unsigned int qual_flags(const unsigned int);
|
|
|
|
#define DECL_IOCTL(name) \
|
|
extern int \
|
|
name ## _ioctl(struct tcb *, unsigned int request, kernel_ulong_t arg) \
|
|
/* End of DECL_IOCTL definition. */
|
|
|
|
DECL_IOCTL(dm);
|
|
DECL_IOCTL(evdev);
|
|
DECL_IOCTL(file);
|
|
DECL_IOCTL(fs_x);
|
|
DECL_IOCTL(kvm);
|
|
DECL_IOCTL(nsfs);
|
|
DECL_IOCTL(ptp);
|
|
DECL_IOCTL(scsi);
|
|
DECL_IOCTL(term);
|
|
DECL_IOCTL(ubi);
|
|
DECL_IOCTL(uffdio);
|
|
#undef DECL_IOCTL
|
|
|
|
extern int decode_sg_io_v4(struct tcb *, const kernel_ulong_t arg);
|
|
extern void print_evdev_ff_type(const kernel_ulong_t val);
|
|
|
|
struct nlmsghdr;
|
|
|
|
typedef bool (*netlink_decoder_t)(struct tcb *, const struct nlmsghdr *,
|
|
kernel_ulong_t addr, unsigned int len);
|
|
|
|
#define DECL_NETLINK(name) \
|
|
extern bool \
|
|
decode_netlink_ ## name(struct tcb *, const struct nlmsghdr *, \
|
|
kernel_ulong_t addr, unsigned int len) \
|
|
/* End of DECL_NETLINK definition. */
|
|
|
|
DECL_NETLINK(crypto);
|
|
DECL_NETLINK(netfilter);
|
|
DECL_NETLINK(route);
|
|
DECL_NETLINK(selinux);
|
|
DECL_NETLINK(sock_diag);
|
|
|
|
extern int ts_nz(const struct timespec *);
|
|
extern int ts_cmp(const struct timespec *, const struct timespec *);
|
|
extern double ts_float(const struct timespec *);
|
|
extern void ts_add(struct timespec *, const struct timespec *, const struct timespec *);
|
|
extern void ts_sub(struct timespec *, const struct timespec *, const struct timespec *);
|
|
extern void ts_mul(struct timespec *, const struct timespec *, int);
|
|
extern void ts_div(struct timespec *, const struct timespec *, int);
|
|
|
|
#ifdef USE_LIBUNWIND
|
|
extern void unwind_init(void);
|
|
extern void unwind_tcb_init(struct tcb *);
|
|
extern void unwind_tcb_fin(struct tcb *);
|
|
extern void unwind_print_stacktrace(struct tcb *);
|
|
extern void unwind_capture_stacktrace(struct tcb *);
|
|
#endif
|
|
|
|
static inline int
|
|
printstrn(struct tcb *tcp, kernel_ulong_t addr, kernel_ulong_t len)
|
|
{
|
|
return printstr_ex(tcp, addr, len, 0);
|
|
}
|
|
|
|
static inline int
|
|
printstr(struct tcb *tcp, kernel_ulong_t addr)
|
|
{
|
|
return printstr_ex(tcp, addr, -1, QUOTE_0_TERMINATED);
|
|
}
|
|
|
|
static inline int
|
|
printflags64(const struct xlat *x, uint64_t flags, const char *dflt)
|
|
{
|
|
return printflags_ex(flags, dflt, x, NULL);
|
|
}
|
|
|
|
static inline int
|
|
printflags(const struct xlat *x, unsigned int flags, const char *dflt)
|
|
{
|
|
return printflags64(x, flags, dflt);
|
|
}
|
|
|
|
static inline int
|
|
printxval64(const struct xlat *x, const uint64_t val, const char *dflt)
|
|
{
|
|
return printxvals(val, dflt, x, NULL);
|
|
}
|
|
|
|
static inline int
|
|
printxval(const struct xlat *x, const unsigned int val, const char *dflt)
|
|
{
|
|
return printxvals(val, dflt, x, NULL);
|
|
}
|
|
|
|
static inline void
|
|
tprint_iov(struct tcb *tcp, kernel_ulong_t len, kernel_ulong_t addr,
|
|
enum iov_decode decode_iov)
|
|
{
|
|
tprint_iov_upto(tcp, len, addr, decode_iov, -1);
|
|
}
|
|
|
|
#ifdef ALPHA
|
|
typedef struct {
|
|
int tv_sec, tv_usec;
|
|
} timeval32_t;
|
|
|
|
extern void print_timeval32_t(const timeval32_t *);
|
|
extern void printrusage32(struct tcb *, kernel_ulong_t);
|
|
extern const char *sprint_timeval32(struct tcb *, kernel_ulong_t addr);
|
|
extern void print_timeval32(struct tcb *, kernel_ulong_t addr);
|
|
extern void print_timeval32_utimes(struct tcb *, kernel_ulong_t addr);
|
|
extern void print_itimerval32(struct tcb *, kernel_ulong_t addr);
|
|
#endif
|
|
|
|
#ifdef HAVE_STRUCT_USER_DESC
|
|
/**
|
|
* Filter what to print from the point of view of the get_thread_area syscall.
|
|
* Kernel copies only entry_number field at first and then tries to write the
|
|
* whole structure.
|
|
*/
|
|
enum user_desc_print_filter {
|
|
/* Print the "entering" part of struct user_desc - entry_number. */
|
|
USER_DESC_ENTERING = 1,
|
|
/* Print the "exiting" part of the structure. */
|
|
USER_DESC_EXITING = 2,
|
|
USER_DESC_BOTH = USER_DESC_ENTERING | USER_DESC_EXITING,
|
|
};
|
|
|
|
extern void print_user_desc(struct tcb *, kernel_ulong_t addr,
|
|
enum user_desc_print_filter filter);
|
|
#endif
|
|
|
|
/* Strace log generation machinery.
|
|
*
|
|
* printing_tcp: tcb which has incomplete line being printed right now.
|
|
* NULL if last line has been completed ('\n'-terminated).
|
|
* printleader(tcp) examines it, finishes incomplete line if needed,
|
|
* the sets it to tcp.
|
|
* line_ended() clears printing_tcp and resets ->curcol = 0.
|
|
* tcp->curcol == 0 check is also used to detect completeness
|
|
* of last line, since in -ff mode just checking printing_tcp for NULL
|
|
* is not enough.
|
|
*
|
|
* If you change this code, test log generation in both -f and -ff modes
|
|
* using:
|
|
* strace -oLOG -f[f] test/threaded_execve
|
|
* strace -oLOG -f[f] test/sigkill_rain
|
|
* strace -oLOG -f[f] -p "`pidof web_browser`"
|
|
*/
|
|
extern struct tcb *printing_tcp;
|
|
extern void printleader(struct tcb *);
|
|
extern void line_ended(void);
|
|
extern void tabto(void);
|
|
extern void tprintf(const char *fmt, ...) ATTRIBUTE_FORMAT((printf, 1, 2));
|
|
extern void tprints(const char *str);
|
|
extern void tprintf_comment(const char *fmt, ...) ATTRIBUTE_FORMAT((printf, 1, 2));
|
|
extern void tprints_comment(const char *str);
|
|
|
|
#if SUPPORTED_PERSONALITIES > 1
|
|
extern void set_personality(unsigned int personality);
|
|
extern unsigned current_personality;
|
|
#else
|
|
# define set_personality(personality) ((void)0)
|
|
# define current_personality 0
|
|
#endif
|
|
|
|
#if SUPPORTED_PERSONALITIES == 1
|
|
# define current_wordsize PERSONALITY0_WORDSIZE
|
|
# define current_klongsize PERSONALITY0_KLONGSIZE
|
|
#else
|
|
# if SUPPORTED_PERSONALITIES == 2 && PERSONALITY0_WORDSIZE == PERSONALITY1_WORDSIZE
|
|
# define current_wordsize PERSONALITY0_WORDSIZE
|
|
# else
|
|
extern unsigned current_wordsize;
|
|
# endif
|
|
# if SUPPORTED_PERSONALITIES == 2 && PERSONALITY0_KLONGSIZE == PERSONALITY1_KLONGSIZE
|
|
# define current_klongsize PERSONALITY0_KLONGSIZE
|
|
# else
|
|
extern unsigned current_klongsize;
|
|
# endif
|
|
#endif
|
|
|
|
#if SIZEOF_KERNEL_LONG_T > 4 \
|
|
&& (SIZEOF_LONG < SIZEOF_KERNEL_LONG_T || !defined(current_wordsize))
|
|
# define ANY_WORDSIZE_LESS_THAN_KERNEL_LONG 1
|
|
#else
|
|
# define ANY_WORDSIZE_LESS_THAN_KERNEL_LONG 0
|
|
#endif
|
|
|
|
#define DECL_PRINTNUM(name) \
|
|
extern bool \
|
|
printnum_ ## name(struct tcb *, kernel_ulong_t addr, const char *fmt) \
|
|
ATTRIBUTE_FORMAT((printf, 3, 0)) \
|
|
/* End of DECL_PRINTNUM definition. */
|
|
|
|
DECL_PRINTNUM(short);
|
|
DECL_PRINTNUM(int);
|
|
DECL_PRINTNUM(int64);
|
|
#undef DECL_PRINTNUM
|
|
|
|
#define DECL_PRINTNUM_ADDR(name) \
|
|
extern bool \
|
|
printnum_addr_ ## name(struct tcb *, kernel_ulong_t addr) \
|
|
/* End of DECL_PRINTNUM_ADDR definition. */
|
|
|
|
DECL_PRINTNUM_ADDR(int);
|
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DECL_PRINTNUM_ADDR(int64);
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#undef DECL_PRINTNUM_ADDR
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#ifndef current_wordsize
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extern bool
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printnum_long_int(struct tcb *, kernel_ulong_t addr,
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const char *fmt_long, const char *fmt_int)
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ATTRIBUTE_FORMAT((printf, 3, 0))
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ATTRIBUTE_FORMAT((printf, 4, 0));
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extern bool printnum_addr_long_int(struct tcb *, kernel_ulong_t addr);
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# define printnum_slong(tcp, addr) \
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printnum_long_int((tcp), (addr), "%" PRId64, "%d")
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# define printnum_ulong(tcp, addr) \
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printnum_long_int((tcp), (addr), "%" PRIu64, "%u")
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# define printnum_ptr(tcp, addr) \
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printnum_addr_long_int((tcp), (addr))
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#elif current_wordsize > 4
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# define printnum_slong(tcp, addr) \
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printnum_int64((tcp), (addr), "%" PRId64)
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# define printnum_ulong(tcp, addr) \
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printnum_int64((tcp), (addr), "%" PRIu64)
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# define printnum_ptr(tcp, addr) \
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printnum_addr_int64((tcp), (addr))
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#else /* current_wordsize == 4 */
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# define printnum_slong(tcp, addr) \
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printnum_int((tcp), (addr), "%d")
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# define printnum_ulong(tcp, addr) \
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printnum_int((tcp), (addr), "%u")
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# define printnum_ptr(tcp, addr) \
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printnum_addr_int((tcp), (addr))
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#endif
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#ifndef current_klongsize
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extern bool printnum_addr_klong_int(struct tcb *, kernel_ulong_t addr);
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# define printnum_kptr(tcp, addr) \
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printnum_addr_klong_int((tcp), (addr))
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#elif current_klongsize > 4
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# define printnum_kptr(tcp, addr) \
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printnum_addr_int64((tcp), (addr))
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#else /* current_klongsize == 4 */
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# define printnum_kptr(tcp, addr) \
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printnum_addr_int((tcp), (addr))
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#endif
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#define DECL_PRINTPAIR(name) \
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extern bool \
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printpair_ ## name(struct tcb *, kernel_ulong_t addr, const char *fmt) \
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ATTRIBUTE_FORMAT((printf, 3, 0)) \
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/* End of DECL_PRINTPAIR definition. */
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DECL_PRINTPAIR(int);
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DECL_PRINTPAIR(int64);
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#undef DECL_PRINTPAIR
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static inline kernel_long_t
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truncate_klong_to_current_wordsize(const kernel_long_t v)
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{
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#if ANY_WORDSIZE_LESS_THAN_KERNEL_LONG
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if (current_wordsize < sizeof(v)) {
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return (int) v;
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} else
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#endif
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{
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return v;
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}
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}
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static inline kernel_ulong_t
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truncate_kulong_to_current_wordsize(const kernel_ulong_t v)
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{
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#if ANY_WORDSIZE_LESS_THAN_KERNEL_LONG
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if (current_wordsize < sizeof(v)) {
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return (unsigned int) v;
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} else
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#endif
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{
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return v;
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}
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}
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/*
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* Cast a pointer or a pointer-sized integer to kernel_ulong_t.
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*/
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#define ptr_to_kulong(v) ((kernel_ulong_t) (unsigned long) (v))
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/*
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* Zero-extend a signed integer type to unsigned long long.
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*/
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#define zero_extend_signed_to_ull(v) \
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(sizeof(v) == sizeof(char) ? (unsigned long long) (unsigned char) (v) : \
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sizeof(v) == sizeof(short) ? (unsigned long long) (unsigned short) (v) : \
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sizeof(v) == sizeof(int) ? (unsigned long long) (unsigned int) (v) : \
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sizeof(v) == sizeof(long) ? (unsigned long long) (unsigned long) (v) : \
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(unsigned long long) (v))
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/*
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* Sign-extend an unsigned integer type to long long.
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*/
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#define sign_extend_unsigned_to_ll(v) \
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(sizeof(v) == sizeof(char) ? (long long) (char) (v) : \
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sizeof(v) == sizeof(short) ? (long long) (short) (v) : \
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sizeof(v) == sizeof(int) ? (long long) (int) (v) : \
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sizeof(v) == sizeof(long) ? (long long) (long) (v) : \
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(long long) (v))
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extern const struct_sysent sysent0[];
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extern const char *const errnoent0[];
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extern const char *const signalent0[];
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extern const struct_ioctlent ioctlent0[];
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extern const char *const personality_names[];
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#if SUPPORTED_PERSONALITIES > 1
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extern const struct_sysent *sysent;
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extern const char *const *errnoent;
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extern const char *const *signalent;
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extern const struct_ioctlent *ioctlent;
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#else
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# define sysent sysent0
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# define errnoent errnoent0
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# define signalent signalent0
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# define ioctlent ioctlent0
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#endif
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extern unsigned nsyscalls;
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extern unsigned nerrnos;
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extern unsigned nsignals;
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extern unsigned nioctlents;
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extern const unsigned int nsyscall_vec[SUPPORTED_PERSONALITIES];
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extern const struct_sysent *const sysent_vec[SUPPORTED_PERSONALITIES];
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extern struct inject_opts *inject_vec[SUPPORTED_PERSONALITIES];
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#ifdef IN_MPERS_BOOTSTRAP
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/* Transform multi-line MPERS_PRINTER_DECL statements to one-liners. */
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# define MPERS_PRINTER_DECL(type, name, ...) MPERS_PRINTER_DECL(type, name, __VA_ARGS__)
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#else /* !IN_MPERS_BOOTSTRAP */
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# if SUPPORTED_PERSONALITIES > 1
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# include "printers.h"
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# else
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|
# include "native_printer_decls.h"
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# endif
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|
# define MPERS_PRINTER_DECL(type, name, ...) type MPERS_FUNC_NAME(name)(__VA_ARGS__)
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#endif /* !IN_MPERS_BOOTSTRAP */
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/* Checks that sysent[scno] is not out of range. */
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static inline bool
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|
scno_in_range(kernel_ulong_t scno)
|
|
{
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|
return scno < nsyscalls;
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}
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|
|
/*
|
|
* Checks whether scno is not out of range,
|
|
* its corresponding sysent[scno].sys_func is non-NULL,
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|
* and its sysent[scno].sys_flags has no TRACE_INDIRECT_SUBCALL flag set.
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|
*/
|
|
static inline bool
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|
scno_is_valid(kernel_ulong_t scno)
|
|
{
|
|
return scno_in_range(scno)
|
|
&& sysent[scno].sys_func
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|
&& !(sysent[scno].sys_flags & TRACE_INDIRECT_SUBCALL);
|
|
}
|
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|
|
#define MPERS_FUNC_NAME__(prefix, name) prefix ## name
|
|
#define MPERS_FUNC_NAME_(prefix, name) MPERS_FUNC_NAME__(prefix, name)
|
|
#define MPERS_FUNC_NAME(name) MPERS_FUNC_NAME_(MPERS_PREFIX, name)
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|
|
#define SYS_FUNC_NAME(syscall_name) MPERS_FUNC_NAME(syscall_name)
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|
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#define SYS_FUNC(syscall_name) int SYS_FUNC_NAME(sys_ ## syscall_name)(struct tcb *tcp)
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|
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#endif /* !STRACE_DEFS_H */
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