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strace/defs.h
Harsha Sharma c9694f85ed netlink: decode libudev netlink header 
* defs.h (decode_netlink_kobject_uevent): New prototype.
* netlink.c (decode_netlink): Decode family kobject_uevent.
* netlink_kobject_uevent.h: New file.
* netlink_kobject_uevent.c: Likewise.
* Makefile.am (strace_SOURCES): Add them.

Co-Authored-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Harsha Sharma <harshasharmaiitr@gmail.com>
2018-04-11 22:01:37 +00:00

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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, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
* Copyright (c) 2001-2018 The strace developers.
* 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.
*/
#ifndef STRACE_DEFS_H
#define STRACE_DEFS_H
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <features.h>
#include <stdbool.h>
#include <stdint.h>
#include <inttypes.h>
#include <sys/types.h>
#include <stddef.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
/* Open-coding isprint(ch) et al proved more efficient than calling
* generalized libc interface. We don't *want* to do non-ASCII anyway.
*/
/* #include <ctype.h> */
#include <string.h>
#include <errno.h>
#include <time.h>
#include <sys/time.h>
#include "arch_defs.h"
#include "error_prints.h"
#include "gcc_compat.h"
#include "kernel_types.h"
#include "macros.h"
#include "mpers_type.h"
#include "string_to_uint.h"
#include "sysent.h"
#include "xmalloc.h"
#ifndef HAVE_STRERROR
const char *strerror(int);
#endif
#ifndef HAVE_STPCPY
/* Some libc have stpcpy, some don't. Sigh...
* Roll our private implementation...
*/
#undef stpcpy
#define stpcpy strace_stpcpy
extern char *stpcpy(char *dst, const char *src);
#endif
/* Glibc has an efficient macro for sigemptyset
* (it just does one or two assignments of 0 to internal vector of longs).
*/
#if defined(__GLIBC__) && defined(__sigemptyset) && !defined(sigemptyset)
# define sigemptyset __sigemptyset
#endif
/* Configuration section */
#ifndef DEFAULT_STRLEN
/* default maximum # of bytes printed in `printstr', change with -s switch */
# define DEFAULT_STRLEN 32
#endif
#ifndef DEFAULT_ACOLUMN
# define DEFAULT_ACOLUMN 40 /* default alignment column for results */
#endif
/*
* Maximum number of args to a syscall.
*
* Make sure that all entries in all syscallent.h files have nargs <= MAX_ARGS!
* linux/<ARCH>/syscallent*.h:
* all have nargs <= 6 except mips o32 which has nargs <= 7.
*/
#ifndef MAX_ARGS
# ifdef LINUX_MIPSO32
# define MAX_ARGS 7
# else
# define MAX_ARGS 6
# endif
#endif
/* default sorting method for call profiling */
#ifndef DEFAULT_SORTBY
# define DEFAULT_SORTBY "time"
#endif
/* To force NOMMU build, set to 1 */
#define NOMMU_SYSTEM 0
#ifndef ERESTARTSYS
# define ERESTARTSYS 512
#endif
#ifndef ERESTARTNOINTR
# define ERESTARTNOINTR 513
#endif
#ifndef ERESTARTNOHAND
# define ERESTARTNOHAND 514
#endif
#ifndef ERESTART_RESTARTBLOCK
# define ERESTART_RESTARTBLOCK 516
#endif
#define PERSONALITY0_WORDSIZE SIZEOF_LONG
#define PERSONALITY0_KLONGSIZE SIZEOF_KERNEL_LONG_T
#define PERSONALITY0_INCLUDE_PRINTERS_DECLS "native_printer_decls.h"
#define PERSONALITY0_INCLUDE_PRINTERS_DEFS "native_printer_defs.h"
#if SUPPORTED_PERSONALITIES > 1
# define PERSONALITY1_WORDSIZE 4
# define PERSONALITY1_KLONGSIZE PERSONALITY1_WORDSIZE
#endif
#if SUPPORTED_PERSONALITIES > 2
# define PERSONALITY2_WORDSIZE 4
# define PERSONALITY2_KLONGSIZE PERSONALITY0_KLONGSIZE
#endif
#if SUPPORTED_PERSONALITIES > 1 && defined HAVE_M32_MPERS
# define PERSONALITY1_INCLUDE_PRINTERS_DECLS "m32_printer_decls.h"
# define PERSONALITY1_INCLUDE_PRINTERS_DEFS "m32_printer_defs.h"
# define PERSONALITY1_INCLUDE_FUNCS "m32_funcs.h"
# define MPERS_m32_IOCTL_MACROS "ioctl_redefs1.h"
# define HAVE_PERSONALITY_1_MPERS 1
#else
# define PERSONALITY1_INCLUDE_PRINTERS_DECLS "native_printer_decls.h"
# define PERSONALITY1_INCLUDE_PRINTERS_DEFS "native_printer_defs.h"
# define PERSONALITY1_INCLUDE_FUNCS "empty.h"
# define HAVE_PERSONALITY_1_MPERS 0
#endif
#if SUPPORTED_PERSONALITIES > 2 && defined HAVE_MX32_MPERS
# define PERSONALITY2_INCLUDE_FUNCS "mx32_funcs.h"
# define PERSONALITY2_INCLUDE_PRINTERS_DECLS "mx32_printer_decls.h"
# define PERSONALITY2_INCLUDE_PRINTERS_DEFS "mx32_printer_defs.h"
# define MPERS_mx32_IOCTL_MACROS "ioctl_redefs2.h"
# define HAVE_PERSONALITY_2_MPERS 1
#else
# define PERSONALITY2_INCLUDE_PRINTERS_DECLS "native_printer_decls.h"
# define PERSONALITY2_INCLUDE_PRINTERS_DEFS "native_printer_defs.h"
# define PERSONALITY2_INCLUDE_FUNCS "empty.h"
# define HAVE_PERSONALITY_2_MPERS 0
#endif
typedef struct ioctlent {
const char *symbol;
unsigned int code;
} struct_ioctlent;
#define INJECT_F_SIGNAL 0x01
#define INJECT_F_ERROR 0x02
#define INJECT_F_RETVAL 0x04
#define INJECT_F_DELAY_ENTER 0x08
#define INJECT_F_DELAY_EXIT 0x10
struct inject_data {
uint8_t flags; /* 5 of 8 flags are used so far */
uint8_t signo; /* NSIG <= 128 */
uint16_t rval_idx; /* index in retval_vec */
uint16_t delay_idx; /* index in delay_data_vec */
};
struct inject_opts {
uint16_t first;
uint16_t step;
struct inject_data data;
};
#define MAX_ERRNO_VALUE 4095
/* Trace Control Block */
struct tcb {
int flags; /* See below for TCB_ values */
int pid; /* If 0, this tcb is free */
int qual_flg; /* qual_flags[scno] or DEFAULT_QUAL_FLAGS + RAW */
unsigned long u_error; /* Error code */
kernel_ulong_t scno; /* System call number */
kernel_ulong_t u_arg[MAX_ARGS]; /* System call arguments */
kernel_long_t u_rval; /* Return value */
#if SUPPORTED_PERSONALITIES > 1
unsigned int currpers; /* Personality at the time of scno update */
#endif
int sys_func_rval; /* Syscall entry parser's return value */
int curcol; /* Output column for this process */
FILE *outf; /* Output file for this process */
const char *auxstr; /* Auxiliary info from syscall (see RVAL_STR) */
void *_priv_data; /* Private data for syscall decoding functions */
void (*_free_priv_data)(void *); /* Callback for freeing priv_data */
const struct_sysent *s_ent; /* sysent[scno] or dummy struct for bad scno */
const struct_sysent *s_prev_ent; /* for "resuming interrupted SYSCALL" msg */
struct inject_opts *inject_vec[SUPPORTED_PERSONALITIES];
struct timespec stime; /* System time usage as of last process wait */
struct timespec dtime; /* Delta for system time usage */
struct timespec etime; /* Syscall entry time */
struct timespec delay_expiration_time; /* When does the delay end */
struct mmap_cache_t *mmap_cache;
unsigned int mmap_cache_size;
unsigned int mmap_cache_generation;
#ifdef ENABLE_STACKTRACE
void *unwind_ctx;
struct unwind_queue_t *unwind_queue;
#endif
};
/* TCB flags */
/* We have attached to this process, but did not see it stopping yet */
#define TCB_STARTUP 0x01
#define TCB_IGNORE_ONE_SIGSTOP 0x02 /* Next SIGSTOP is to be ignored */
/*
* Are we in system call entry or in syscall exit?
*
* This bit is set in syscall_entering_finish() and cleared in
* syscall_exiting_finish().
* Other stops which are possible directly after syscall entry (death, ptrace
* event stop) are handled without calling syscall_{entering,exiting}_*().
*
* Use entering(tcp) / exiting(tcp) to check this bit to make code more
* readable.
*/
#define TCB_INSYSCALL 0x04
#define TCB_ATTACHED 0x08 /* We attached to it already */
#define TCB_REPRINT 0x10 /* We should reprint this syscall on exit */
#define TCB_FILTERED 0x20 /* This system call has been filtered out */
#define TCB_TAMPERED 0x40 /* A syscall has been tampered with */
#define TCB_HIDE_LOG 0x80 /* We should hide everything (until execve) */
#define TCB_SKIP_DETACH_ON_FIRST_EXEC 0x100 /* -b execve should skip detach on first execve */
#define TCB_GRABBED 0x200 /* We grab the process and can catch it
* in the middle of a syscall */
#define TCB_RECOVERING 0x400 /* We try to recover after detecting incorrect
* syscall entering/exiting state */
#define TCB_INJECT_DELAY_EXIT 0x800 /* Current syscall needs to be delayed
on exit */
#define TCB_DELAYED 0x1000 /* Current syscall has been delayed */
/* qualifier flags */
#define QUAL_TRACE 0x001 /* this system call should be traced */
#define QUAL_ABBREV 0x002 /* abbreviate the structures of this syscall */
#define QUAL_VERBOSE 0x004 /* decode the structures of this syscall */
#define QUAL_RAW 0x008 /* print all args in hex for this syscall */
#define QUAL_INJECT 0x010 /* tamper with this system call on purpose */
#define DEFAULT_QUAL_FLAGS (QUAL_TRACE | QUAL_ABBREV | QUAL_VERBOSE)
#define entering(tcp) (!((tcp)->flags & TCB_INSYSCALL))
#define exiting(tcp) ((tcp)->flags & TCB_INSYSCALL)
#define syserror(tcp) ((tcp)->u_error != 0)
#define traced(tcp) ((tcp)->qual_flg & QUAL_TRACE)
#define verbose(tcp) ((tcp)->qual_flg & QUAL_VERBOSE)
#define abbrev(tcp) ((tcp)->qual_flg & QUAL_ABBREV)
#define raw(tcp) ((tcp)->qual_flg & QUAL_RAW)
#define inject(tcp) ((tcp)->qual_flg & QUAL_INJECT)
#define filtered(tcp) ((tcp)->flags & TCB_FILTERED)
#define hide_log(tcp) ((tcp)->flags & TCB_HIDE_LOG)
#define syscall_tampered(tcp) ((tcp)->flags & TCB_TAMPERED)
#define recovering(tcp) ((tcp)->flags & TCB_RECOVERING)
#define inject_delay_exit(tcp) ((tcp)->flags & TCB_INJECT_DELAY_EXIT)
#define syscall_delayed(tcp) ((tcp)->flags & TCB_DELAYED)
#include "xlat.h"
extern const struct xlat addrfams[];
extern const struct xlat arp_hardware_types[];
extern const struct xlat at_flags[];
extern const struct xlat clocknames[];
extern const struct xlat dirent_types[];
/** Ethernet protocols list, sorted and unterminated, defined in sockaddr.c. */
extern const struct xlat ethernet_protocols[];
/** Ethernet protocols array size without terminating record. */
extern const size_t ethernet_protocols_size;
extern const struct xlat evdev_abs[];
extern const struct xlat iffflags[];
extern const struct xlat inet_protocols[];
extern const struct xlat ip_type_of_services[];
extern const struct xlat msg_flags[];
extern const struct xlat netlink_protocols[];
extern const struct xlat nl_netfilter_msg_types[];
extern const struct xlat nl_route_types[];
extern const struct xlat open_access_modes[];
extern const struct xlat open_mode_flags[];
extern const struct xlat resource_flags[];
extern const struct xlat routing_scopes[];
extern const struct xlat routing_table_ids[];
extern const struct xlat routing_types[];
extern const struct xlat seccomp_filter_flags[];
extern const struct xlat seccomp_ret_action[];
extern const struct xlat setns_types[];
extern const struct xlat sg_io_info[];
extern const struct xlat socketlayers[];
extern const struct xlat socktypes[];
extern const struct xlat tcp_state_flags[];
extern const struct xlat tcp_states[];
extern const struct xlat whence_codes[];
/* Format of syscall return values */
#define RVAL_UDECIMAL 000 /* unsigned decimal format */
#define RVAL_HEX 001 /* hex format */
#define RVAL_OCTAL 002 /* octal format */
#define RVAL_FD 010 /* file descriptor */
#define RVAL_MASK 013 /* mask for these values */
#define RVAL_STR 020 /* Print `auxstr' field after return val */
#define RVAL_NONE 040 /* Print nothing */
#define RVAL_DECODED 0100 /* syscall decoding finished */
#define RVAL_IOCTL_DECODED 0200 /* ioctl sub-parser successfully decoded
the argument */
#define IOCTL_NUMBER_UNKNOWN 0
#define IOCTL_NUMBER_HANDLED 1
#define IOCTL_NUMBER_STOP_LOOKUP 010
#define indirect_ipccall(tcp) (tcp->s_ent->sys_flags & TRACE_INDIRECT_SUBCALL)
enum sock_proto {
SOCK_PROTO_UNKNOWN,
SOCK_PROTO_UNIX,
SOCK_PROTO_TCP,
SOCK_PROTO_UDP,
SOCK_PROTO_TCPv6,
SOCK_PROTO_UDPv6,
SOCK_PROTO_NETLINK
};
extern enum sock_proto get_proto_by_name(const char *);
enum iov_decode {
IOV_DECODE_ADDR,
IOV_DECODE_STR,
IOV_DECODE_NETLINK
};
typedef enum {
CFLAG_NONE = 0,
CFLAG_ONLY_STATS,
CFLAG_BOTH
} cflag_t;
extern cflag_t cflag;
extern bool Tflag;
extern bool iflag;
extern bool count_wallclock;
extern unsigned int qflag;
extern bool not_failing_only;
extern unsigned int show_fd_path;
/* are we filtering traces based on paths? */
extern struct path_set {
const char **paths_selected;
size_t num_selected;
size_t size;
} global_path_set;
#define tracing_paths (global_path_set.num_selected != 0)
extern unsigned xflag;
extern unsigned followfork;
#ifdef ENABLE_STACKTRACE
/* if this is true do the stack trace for every system call */
extern bool stack_trace_enabled;
#endif
extern unsigned ptrace_setoptions;
extern unsigned max_strlen;
extern unsigned os_release;
#undef KERNEL_VERSION
#define KERNEL_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c))
extern int read_int_from_file(struct tcb *, const char *, int *);
extern void set_sortby(const char *);
extern void set_overhead(int);
extern void print_pc(struct tcb *);
extern int syscall_entering_decode(struct tcb *);
extern int syscall_entering_trace(struct tcb *, unsigned int *);
extern void syscall_entering_finish(struct tcb *, int);
extern int syscall_exiting_decode(struct tcb *, struct timespec *);
extern int syscall_exiting_trace(struct tcb *, struct timespec *, int);
extern void syscall_exiting_finish(struct tcb *);
extern void count_syscall(struct tcb *, const struct timespec *);
extern void call_summary(FILE *);
extern void clear_regs(struct tcb *tcp);
extern int get_scno(struct tcb *);
extern kernel_ulong_t get_rt_sigframe_addr(struct tcb *);
/**
* Convert a (shuffled) syscall number to the corresponding syscall name.
*
* @param scno Syscall number.
* @return String literal corresponding to the syscall number in case latter
* is valid; NULL otherwise.
*/
extern const char *syscall_name(kernel_ulong_t scno);
/**
* Convert a syscall name to the corresponding (shuffled) syscall number.
*
* @param s Syscall name.
* @param p Personality.
* @param start From which position in syscall entry table resume the search.
* @return Shuffled syscall number (ready to use against sysent_vec)
* if syscall name is found; -1 otherwise.
*/
extern kernel_long_t scno_by_name(const char *s, unsigned p,
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_printaddr64(struct tcb *, uint64_t addr,
unsigned int len, void *laddr);
#define umove_or_printaddr64(pid, addr, objp) \
umoven_or_printaddr64((pid), (addr), sizeof(*(objp)), (void *) (objp))
static inline int
umoven_or_printaddr(struct tcb *tcp, const kernel_ulong_t addr,
unsigned int len, void *laddr)
{
return umoven_or_printaddr64(tcp, addr, len, laddr);
}
#define umove_or_printaddr(pid, addr, objp) \
umoven_or_printaddr((pid), (addr), sizeof(*(objp)), (void *) (objp))
extern int
umoven_or_printaddr64_ignore_syserror(struct tcb *, uint64_t addr,
unsigned int len, void *laddr);
static inline int
umoven_or_printaddr_ignore_syserror(struct tcb *tcp, const kernel_ulong_t addr,
unsigned int len, void *laddr)
{
return umoven_or_printaddr64_ignore_syserror(tcp, addr, len, 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_uint64_array_member(struct tcb *tcp, void *elem_buf,
size_t elem_size, void *data);
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 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 print_bpf_filter_code(const uint16_t code, bool extended);
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 void
decode_netlink_kobject_uevent(struct tcb *, kernel_ulong_t addr,
kernel_ulong_t len);
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 ENABLE_STACKTRACE
extern void unwind_init(void);
extern void unwind_tcb_init(struct tcb *);
extern void unwind_tcb_fin(struct tcb *);
extern void unwind_tcb_print(struct tcb *);
extern void unwind_tcb_capture(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
#define max_addr() (~0ULL >> ((8 - current_wordsize) * 8))
#define max_kaddr() (~0ULL >> ((8 - current_klongsize) * 8))
/*
* When u64 is interpreted by the kernel as an address, there is a difference
* in behaviour between 32-bit and 64-bit kernel in the way u64_to_user_ptr
* works (32-bit kernel trims higher bits during conversion which may result
* to a valid address). Since 32-bit strace cannot figure out what kind of
* kernel the tracee is running on, it has to account for both possibilities.
*/
#if CAN_ARCH_BE_COMPAT_ON_64BIT_KERNEL
/**
* Print raw 64-bit value as an address if it's too big to fit in strace's
* kernel_long_t.
*/
static inline void
print_big_u64_addr(const uint64_t addr)
{
if (sizeof(kernel_long_t) < 8 && addr > max_kaddr()) {
printaddr64(addr);
tprints(" or ");
}
}
#else /* !CAN_ARCH_BE_COMPAT_ON_64BIT_KERNEL */
# define print_big_u64_addr(addr_) ((void) 0)
#endif /* CAN_ARCH_BE_COMPAT_ON_64BIT_KERNEL */
#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);
DECL_PRINTNUM_ADDR(int64);
#undef DECL_PRINTNUM_ADDR
#ifndef current_wordsize
extern bool
printnum_long_int(struct tcb *, kernel_ulong_t addr,
const char *fmt_long, const char *fmt_int)
ATTRIBUTE_FORMAT((printf, 3, 0))
ATTRIBUTE_FORMAT((printf, 4, 0));
extern bool printnum_addr_long_int(struct tcb *, kernel_ulong_t addr);
# define printnum_slong(tcp, addr) \
printnum_long_int((tcp), (addr), "%" PRId64, "%d")
# define printnum_ulong(tcp, addr) \
printnum_long_int((tcp), (addr), "%" PRIu64, "%u")
# define printnum_ptr(tcp, addr) \
printnum_addr_long_int((tcp), (addr))
#elif current_wordsize > 4
# define printnum_slong(tcp, addr) \
printnum_int64((tcp), (addr), "%" PRId64)
# define printnum_ulong(tcp, addr) \
printnum_int64((tcp), (addr), "%" PRIu64)
# define printnum_ptr(tcp, addr) \
printnum_addr_int64((tcp), (addr))
#else /* current_wordsize == 4 */
# define printnum_slong(tcp, addr) \
printnum_int((tcp), (addr), "%d")
# define printnum_ulong(tcp, addr) \
printnum_int((tcp), (addr), "%u")
# define printnum_ptr(tcp, addr) \
printnum_addr_int((tcp), (addr))
#endif
#ifndef current_klongsize
extern bool printnum_addr_klong_int(struct tcb *, kernel_ulong_t addr);
# define printnum_kptr(tcp, addr) \
printnum_addr_klong_int((tcp), (addr))
#elif current_klongsize > 4
# define printnum_kptr(tcp, addr) \
printnum_addr_int64((tcp), (addr))
#else /* current_klongsize == 4 */
# define printnum_kptr(tcp, addr) \
printnum_addr_int((tcp), (addr))
#endif
#define DECL_PRINTPAIR(name) \
extern bool \
printpair_ ## name(struct tcb *, kernel_ulong_t addr, const char *fmt) \
ATTRIBUTE_FORMAT((printf, 3, 0)) \
/* End of DECL_PRINTPAIR definition. */
DECL_PRINTPAIR(int);
DECL_PRINTPAIR(int64);
#undef DECL_PRINTPAIR
static inline kernel_long_t
truncate_klong_to_current_wordsize(const kernel_long_t v)
{
#if ANY_WORDSIZE_LESS_THAN_KERNEL_LONG
if (current_wordsize < sizeof(v)) {
return (int) v;
} else
#endif
{
return v;
}
}
static inline kernel_ulong_t
truncate_kulong_to_current_wordsize(const kernel_ulong_t v)
{
#if ANY_WORDSIZE_LESS_THAN_KERNEL_LONG
if (current_wordsize < sizeof(v)) {
return (unsigned int) v;
} else
#endif
{
return v;
}
}
/*
* Cast a pointer or a pointer-sized integer to kernel_ulong_t.
*/
#define ptr_to_kulong(v) ((kernel_ulong_t) (unsigned long) (v))
/*
* Zero-extend a signed integer type to unsigned long long.
*/
#define zero_extend_signed_to_ull(v) \
(sizeof(v) == sizeof(char) ? (unsigned long long) (unsigned char) (v) : \
sizeof(v) == sizeof(short) ? (unsigned long long) (unsigned short) (v) : \
sizeof(v) == sizeof(int) ? (unsigned long long) (unsigned int) (v) : \
sizeof(v) == sizeof(long) ? (unsigned long long) (unsigned long) (v) : \
(unsigned long long) (v))
/*
* Sign-extend an unsigned integer type to long long.
*/
#define sign_extend_unsigned_to_ll(v) \
(sizeof(v) == sizeof(char) ? (long long) (char) (v) : \
sizeof(v) == sizeof(short) ? (long long) (short) (v) : \
sizeof(v) == sizeof(int) ? (long long) (int) (v) : \
sizeof(v) == sizeof(long) ? (long long) (long) (v) : \
(long long) (v))
extern const struct_sysent sysent0[];
extern const char *const errnoent0[];
extern const char *const signalent0[];
extern const struct_ioctlent ioctlent0[];
extern const char *const personality_names[];
#if SUPPORTED_PERSONALITIES > 1
extern const struct_sysent *sysent;
extern const char *const *errnoent;
extern const char *const *signalent;
extern const struct_ioctlent *ioctlent;
#else
# define sysent sysent0
# define errnoent errnoent0
# define signalent signalent0
# define ioctlent ioctlent0
#endif
extern unsigned nsyscalls;
extern unsigned nerrnos;
extern unsigned nsignals;
extern unsigned nioctlents;
extern const unsigned int nsyscall_vec[SUPPORTED_PERSONALITIES];
extern const struct_sysent *const sysent_vec[SUPPORTED_PERSONALITIES];
extern struct inject_opts *inject_vec[SUPPORTED_PERSONALITIES];
#ifdef IN_MPERS_BOOTSTRAP
/* Transform multi-line MPERS_PRINTER_DECL statements to one-liners. */
# define MPERS_PRINTER_DECL(type, name, ...) MPERS_PRINTER_DECL(type, name, __VA_ARGS__)
#else /* !IN_MPERS_BOOTSTRAP */
# if SUPPORTED_PERSONALITIES > 1
# include "printers.h"
# else
# include "native_printer_decls.h"
# endif
# define MPERS_PRINTER_DECL(type, name, ...) type MPERS_FUNC_NAME(name)(__VA_ARGS__)
#endif /* !IN_MPERS_BOOTSTRAP */
/* Checks that sysent[scno] is not out of range. */
static inline bool
scno_in_range(kernel_ulong_t scno)
{
return scno < nsyscalls;
}
/*
* Checks whether scno is not out of range,
* its corresponding sysent[scno].sys_func is non-NULL,
* and its sysent[scno].sys_flags has no TRACE_INDIRECT_SUBCALL flag set.
*/
static inline bool
scno_is_valid(kernel_ulong_t scno)
{
return scno_in_range(scno)
&& sysent[scno].sys_func
&& !(sysent[scno].sys_flags & TRACE_INDIRECT_SUBCALL);
}
#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)
#define SYS_FUNC_NAME(syscall_name) MPERS_FUNC_NAME(syscall_name)
#define SYS_FUNC(syscall_name) int SYS_FUNC_NAME(sys_ ## syscall_name)(struct tcb *tcp)
#endif /* !STRACE_DEFS_H */
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