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strace/defs.h
Dmitry V. Levin 3c17d1b5e1 Implement caching of print_sockaddr_by_inode 
As -yy parser, compared to -y, needs to do at least 5 extra syscalls
(getxattr, socket, sendmsg, recvmsg, close) to print socket details,
caching results of netlink conversations between strace and kernel
noticeably reduces amount of system time spent by strace.

The caching is safe since sockets do not change their addresses after
successful bind or connect syscall.

* defs.h (string_quote, print_sockaddr_by_inode_cached): New prototypes.
* socketutils.c (cache_entry): New type.
(CACHE_SIZE, CACHE_MASK): New macros.
(cache): New static array.
(cache_and_print_inode_details): New static function.
(print_sockaddr_by_inode_cached): New function.
(inet_parse_response, unix_parse_response): Use
cache_and_print_inode_details.
* util.c (printfd): Use string_quote and print_sockaddr_by_inode_cached.
(string_quote): Remove static qualifier.
* NEWS: Mention this improvement.
* tests/unix-yy.c (main): Update.
2016-02-03 12:43:22 +00:00

771 lines
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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>
* 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.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <features.h>
#ifdef HAVE_STDBOOL_H
# include <stdbool.h>
#endif
#include <stdint.h>
#include <inttypes.h>
#include <sys/types.h>
#ifdef STDC_HEADERS
# include <stddef.h>
#endif
#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 <sys/syscall.h>
#include "mpers_type.h"
#include "gcc_compat.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
#ifndef offsetof
# define offsetof(type, member) \
(((char *) &(((type *) NULL)->member)) - ((char *) (type *) NULL))
#endif
#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
/* macros */
#ifndef MAX
# define MAX(a, b) (((a) > (b)) ? (a) : (b))
#endif
#ifndef MIN
# define MIN(a, b) (((a) < (b)) ? (a) : (b))
#endif
#define CLAMP(val, min, max) MIN(MAX(min, val), max)
/* 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
/*
* Experimental code using PTRACE_SEIZE can be enabled here.
* This needs Linux kernel 3.4.x or later to work.
*/
#define USE_SEIZE 1
/* To force NOMMU build, set to 1 */
#define NOMMU_SYSTEM 0
/*
* Set to 1 to use speed-optimized vfprintf implementation.
* It results in strace using about 5% less CPU in user space
* (compared to glibc version).
* But strace spends a lot of time in kernel space,
* so overall it does not appear to be a significant win.
* Thus disabled by default.
*/
#define USE_CUSTOM_PRINTF 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
#if defined(SPARC) || defined(SPARC64)
# define PERSONALITY0_WORDSIZE 4
# if defined(SPARC64)
# define SUPPORTED_PERSONALITIES 2
# define PERSONALITY1_WORDSIZE 8
# ifdef HAVE_M32_MPERS
# define PERSONALITY1_INCLUDE_FUNCS "m32_funcs.h"
# define PERSONALITY1_INCLUDE_PRINTERS_DECLS "m32_printer_decls.h"
# define PERSONALITY1_INCLUDE_PRINTERS_DEFS "m32_printer_defs.h"
# endif
# endif
#endif
#ifdef X86_64
# define SUPPORTED_PERSONALITIES 3
# define PERSONALITY0_WORDSIZE 8
# define PERSONALITY1_WORDSIZE 4
# define PERSONALITY2_WORDSIZE 4
# ifdef HAVE_M32_MPERS
# define PERSONALITY1_INCLUDE_FUNCS "m32_funcs.h"
# define PERSONALITY1_INCLUDE_PRINTERS_DECLS "m32_printer_decls.h"
# define PERSONALITY1_INCLUDE_PRINTERS_DEFS "m32_printer_defs.h"
# endif
# ifdef 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"
# endif
#endif
#ifdef X32
# define SUPPORTED_PERSONALITIES 2
# define PERSONALITY0_WORDSIZE 4
# define PERSONALITY1_WORDSIZE 4
# ifdef HAVE_M32_MPERS
# define PERSONALITY1_INCLUDE_FUNCS "m32_funcs.h"
# define PERSONALITY1_INCLUDE_PRINTERS_DECLS "m32_printer_decls.h"
# define PERSONALITY1_INCLUDE_PRINTERS_DEFS "m32_printer_defs.h"
# endif
#endif
#ifdef ARM
/* one personality */
#endif
#ifdef AARCH64
/* The existing ARM personality, then AArch64 */
# define SUPPORTED_PERSONALITIES 2
# define PERSONALITY0_WORDSIZE 8
# define PERSONALITY1_WORDSIZE 4
# ifdef HAVE_M32_MPERS
# define PERSONALITY1_INCLUDE_FUNCS "m32_funcs.h"
# define PERSONALITY1_INCLUDE_PRINTERS_DECLS "m32_printer_decls.h"
# define PERSONALITY1_INCLUDE_PRINTERS_DEFS "m32_printer_defs.h"
# endif
#endif
#ifdef POWERPC64
# define SUPPORTED_PERSONALITIES 2
# define PERSONALITY0_WORDSIZE 8
# define PERSONALITY1_WORDSIZE 4
# ifdef HAVE_M32_MPERS
# define PERSONALITY1_INCLUDE_FUNCS "m32_funcs.h"
# define PERSONALITY1_INCLUDE_PRINTERS_DECLS "m32_printer_decls.h"
# define PERSONALITY1_INCLUDE_PRINTERS_DEFS "m32_printer_defs.h"
# endif
#endif
#ifdef TILE
# define SUPPORTED_PERSONALITIES 2
# define PERSONALITY0_WORDSIZE 8
# define PERSONALITY1_WORDSIZE 4
# ifdef __tilepro__
# define DEFAULT_PERSONALITY 1
# endif
# ifdef HAVE_M32_MPERS
# define PERSONALITY1_INCLUDE_FUNCS "m32_funcs.h"
# define PERSONALITY1_INCLUDE_PRINTERS_DECLS "m32_printer_decls.h"
# define PERSONALITY1_INCLUDE_PRINTERS_DEFS "m32_printer_defs.h"
# endif
#endif
#ifndef SUPPORTED_PERSONALITIES
# define SUPPORTED_PERSONALITIES 1
#endif
#ifndef DEFAULT_PERSONALITY
# define DEFAULT_PERSONALITY 0
#endif
#ifndef PERSONALITY0_WORDSIZE
# define PERSONALITY0_WORDSIZE SIZEOF_LONG
#endif
#ifndef PERSONALITY0_INCLUDE_PRINTERS_DECLS
# define PERSONALITY0_INCLUDE_PRINTERS_DECLS "native_printer_decls.h"
#endif
#ifndef PERSONALITY0_INCLUDE_PRINTERS_DEFS
# define PERSONALITY0_INCLUDE_PRINTERS_DEFS "native_printer_defs.h"
#endif
#ifndef PERSONALITY1_INCLUDE_PRINTERS_DECLS
# define PERSONALITY1_INCLUDE_PRINTERS_DECLS "native_printer_decls.h"
#endif
#ifndef PERSONALITY1_INCLUDE_PRINTERS_DEFS
# define PERSONALITY1_INCLUDE_PRINTERS_DEFS "native_printer_defs.h"
#endif
#ifndef PERSONALITY2_INCLUDE_PRINTERS_DECLS
# define PERSONALITY2_INCLUDE_PRINTERS_DECLS "native_printer_decls.h"
#endif
#ifndef PERSONALITY2_INCLUDE_PRINTERS_DEFS
# define PERSONALITY2_INCLUDE_PRINTERS_DEFS "native_printer_defs.h"
#endif
#ifndef PERSONALITY1_INCLUDE_FUNCS
# define PERSONALITY1_INCLUDE_FUNCS "empty.h"
#endif
#ifndef PERSONALITY2_INCLUDE_FUNCS
# define PERSONALITY2_INCLUDE_FUNCS "empty.h"
#endif
typedef struct sysent {
unsigned nargs;
int sys_flags;
int sen;
int (*sys_func)();
const char *sys_name;
} struct_sysent;
typedef struct ioctlent {
const char *symbol;
unsigned int code;
} struct_ioctlent;
/* 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 */
int u_error; /* Error code */
long scno; /* System call number */
long u_arg[MAX_ARGS]; /* System call arguments */
#if defined(LINUX_MIPSN32) || defined(X32)
long long ext_arg[MAX_ARGS];
long long u_lrval; /* long long return value */
#endif
long 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) */
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 timeval stime; /* System time usage as of last process wait */
struct timeval dtime; /* Delta for system time usage */
struct timeval etime; /* Syscall entry time */
#ifdef USE_LIBUNWIND
struct UPT_info* libunwind_ui;
struct mmap_cache_t* mmap_cache;
unsigned int mmap_cache_size;
unsigned int mmap_cache_generation;
struct queue_t* 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 after all syscall entry processing is done.
* Therefore, this bit will be set when next ptrace stop occurs,
* which should be syscall exit stop. Other stops which are possible
* directly after syscall entry (death, ptrace event stop)
* are simpler and handled without calling trace_syscall(), therefore
* the places where TCB_INSYSCALL can be set but we aren't in syscall stop
* are limited to trace(), this condition is never observed in trace_syscall()
* and below.
* The bit is cleared after all syscall exit processing is done.
*
* 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 */
/* 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_SIGNAL 0x010 /* report events with this signal */
#define QUAL_READ 0x020 /* dump data read on this file descriptor */
#define QUAL_WRITE 0x040 /* dump data written to this file descriptor */
typedef uint8_t qualbits_t;
#define UNDEFINED_SCNO 0x100 /* Used only in tcp->qual_flg */
#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 verbose(tcp) ((tcp)->qual_flg & QUAL_VERBOSE)
#define abbrev(tcp) ((tcp)->qual_flg & QUAL_ABBREV)
#define filtered(tcp) ((tcp)->flags & TCB_FILTERED)
struct xlat {
unsigned int val;
const char *str;
};
#define XLAT(x) { x, #x }
#define XLAT_END { 0, NULL }
extern const struct xlat addrfams[];
extern const struct xlat at_flags[];
extern const struct xlat dirent_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 whence_codes[];
/* Format of syscall return values */
#define RVAL_DECIMAL 000 /* decimal format */
#define RVAL_HEX 001 /* hex format */
#define RVAL_OCTAL 002 /* octal format */
#define RVAL_UDECIMAL 003 /* unsigned decimal format */
#if defined(LINUX_MIPSN32) || defined(X32)
# if 0 /* unused so far */
# define RVAL_LDECIMAL 004 /* long decimal format */
# define RVAL_LHEX 005 /* long hex format */
# define RVAL_LOCTAL 006 /* long octal format */
# endif
# define RVAL_LUDECIMAL 007 /* long unsigned decimal format */
#endif
#define RVAL_FD 010 /* file descriptor */
#define RVAL_MASK 017 /* 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 TRACE_FILE 001 /* Trace file-related syscalls. */
#define TRACE_IPC 002 /* Trace IPC-related syscalls. */
#define TRACE_NETWORK 004 /* Trace network-related syscalls. */
#define TRACE_PROCESS 010 /* Trace process-related syscalls. */
#define TRACE_SIGNAL 020 /* Trace signal-related syscalls. */
#define TRACE_DESC 040 /* Trace file descriptor-related syscalls. */
#define TRACE_MEMORY 0100 /* Trace memory mapping-related syscalls. */
#define SYSCALL_NEVER_FAILS 0200 /* Syscall is always successful. */
#define STACKTRACE_INVALIDATE_CACHE 0400 /* Trigger proc/maps cache updating */
#define STACKTRACE_CAPTURE_ON_ENTER 01000 /* Capture stacktrace on "entering" stage */
#define TRACE_INDIRECT_SUBCALL 02000 /* Syscall is an indirect socket/ipc subcall. */
#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)
#if defined(ARM) || defined(AARCH64) \
|| defined(I386) || defined(X32) || defined(X86_64) \
|| defined(IA64) \
|| defined(BFIN) \
|| defined(M68K) \
|| defined(MICROBLAZE) \
|| defined(S390) \
|| defined(SH) || defined(SH64) \
|| defined(SPARC) || defined(SPARC64) \
/**/
# define NEED_UID16_PARSERS 1
#else
# define NEED_UID16_PARSERS 0
#endif
typedef enum {
CFLAG_NONE = 0,
CFLAG_ONLY_STATS,
CFLAG_BOTH
} cflag_t;
extern cflag_t cflag;
extern bool debug_flag;
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;
extern bool hide_log_until_execve;
/* are we filtering traces based on paths? */
extern const char **paths_selected;
#define tracing_paths (paths_selected != NULL)
extern unsigned xflag;
extern unsigned followfork;
#ifdef USE_LIBUNWIND
/* 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))
void error_msg(const char *fmt, ...) ATTRIBUTE_FORMAT((printf, 1, 2));
void perror_msg(const char *fmt, ...) ATTRIBUTE_FORMAT((printf, 1, 2));
void error_msg_and_die(const char *fmt, ...)
ATTRIBUTE_FORMAT((printf, 1, 2)) ATTRIBUTE_NORETURN;
void error_msg_and_help(const char *fmt, ...)
ATTRIBUTE_FORMAT((printf, 1, 2)) ATTRIBUTE_NORETURN;
void perror_msg_and_die(const char *fmt, ...)
ATTRIBUTE_FORMAT((printf, 1, 2)) ATTRIBUTE_NORETURN;
void die_out_of_memory(void) ATTRIBUTE_NORETURN;
void *xmalloc(size_t size) ATTRIBUTE_MALLOC ATTRIBUTE_ALLOC_SIZE((1));
void *xcalloc(size_t nmemb, size_t size)
ATTRIBUTE_MALLOC ATTRIBUTE_ALLOC_SIZE((1, 2));
void *xreallocarray(void *ptr, size_t nmemb, size_t size)
ATTRIBUTE_ALLOC_SIZE((2, 3));
char *xstrdup(const char *str) ATTRIBUTE_MALLOC;
#if USE_CUSTOM_PRINTF
/*
* See comment in vsprintf.c for allowed formats.
* Short version: %h[h]u, %zu, %tu are not allowed, use %[l[l]]u.
*/
int strace_vfprintf(FILE *fp, const char *fmt, va_list args);
#else
# define strace_vfprintf vfprintf
#endif
extern void set_sortby(const char *);
extern void set_overhead(int);
extern void qualify(const char *);
extern void print_pc(struct tcb *);
extern int trace_syscall(struct tcb *);
extern void count_syscall(struct tcb *, const struct timeval *);
extern void call_summary(FILE *);
extern void clear_regs(void);
extern void get_regs(pid_t pid);
extern int get_scno(struct tcb *tcp);
extern const char *syscall_name(long scno);
extern bool is_erestart(struct tcb *);
extern void temporarily_clear_syserror(struct tcb *);
extern void restore_cleared_syserror(struct tcb *);
extern int umoven(struct tcb *, long, unsigned int, void *);
#define umove(pid, addr, objp) \
umoven((pid), (addr), sizeof(*(objp)), (void *) (objp))
extern int umoven_or_printaddr(struct tcb *, long, unsigned int, void *);
#define umove_or_printaddr(pid, addr, objp) \
umoven_or_printaddr((pid), (addr), sizeof(*(objp)), (void *) (objp))
extern int umove_ulong_or_printaddr(struct tcb *, long, unsigned long *);
extern int umove_ulong_array_or_printaddr(struct tcb *, long, unsigned long *, size_t);
extern int umovestr(struct tcb *, long, unsigned int, char *);
extern int upeek(int pid, long, long *);
#if defined ALPHA || defined IA64 || defined MIPS \
|| defined SH || defined SPARC || defined SPARC64
# define HAVE_GETRVAL2
extern long getrval2(struct tcb *);
#else
# undef HAVE_GETRVAL2
#endif
extern const char *signame(const int);
extern void pathtrace_select(const char *);
extern int pathtrace_match(struct tcb *);
extern int getfdpath(struct tcb *, int, char *, unsigned);
extern const char *xlookup(const struct xlat *, const unsigned int);
extern const char *xlat_search(const struct xlat *, const size_t, const unsigned int);
extern unsigned long get_pagesize(void);
extern int string_to_uint(const char *str);
extern int next_set_bit(const void *bit_array, unsigned cur_bit, unsigned size_bits);
#define QUOTE_0_TERMINATED 0x01
#define QUOTE_OMIT_LEADING_TRAILING_QUOTES 0x02
extern int string_quote(const char *, char *, unsigned int, unsigned int);
extern int print_quoted_string(const char *, unsigned int, unsigned int);
/* a refers to the lower numbered u_arg,
* b refers to the higher numbered u_arg
*/
#ifdef WORDS_BIGENDIAN
# define LONG_LONG(a,b) \
((long long)((unsigned long long)(unsigned)(b) | ((unsigned long long)(a)<<32)))
#else
# define LONG_LONG(a,b) \
((long long)((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 printaddr(long);
extern void printxvals(const unsigned int, const char *, const struct xlat *, ...);
#define printxval(xlat, val, dflt) printxvals(val, dflt, xlat, NULL)
extern int printargs(struct tcb *);
extern int printargs_lu(struct tcb *);
extern int printargs_ld(struct tcb *);
extern void addflags(const struct xlat *, int);
extern int printflags(const struct xlat *, int, const char *);
extern const char *sprintflags(const char *, const struct xlat *, int);
extern const char *sprintmode(int);
extern const char *sprinttime(time_t);
extern void dumpiov_in_msghdr(struct tcb *, long, unsigned long);
extern void dumpiov_in_mmsghdr(struct tcb *, long);
extern void dumpiov_upto(struct tcb *, int, long, unsigned long);
#define dumpiov(tcp, len, addr) \
dumpiov_upto((tcp), (len), (addr), (unsigned long) -1L)
extern void dumpstr(struct tcb *, long, int);
extern void printstr(struct tcb *, long, long);
extern bool printnum_short(struct tcb *, long, const char *)
ATTRIBUTE_FORMAT((printf, 3, 0));
extern bool printnum_int(struct tcb *, long, const char *)
ATTRIBUTE_FORMAT((printf, 3, 0));
extern bool printnum_int64(struct tcb *, long, const char *)
ATTRIBUTE_FORMAT((printf, 3, 0));
#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
extern bool printnum_long_int(struct tcb *, long, const char *, const char *)
ATTRIBUTE_FORMAT((printf, 3, 0))
ATTRIBUTE_FORMAT((printf, 4, 0));
# 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_long_int((tcp), (addr), "%#" PRIx64, "%#x")
#elif SIZEOF_LONG > 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_int64((tcp), (addr), "%#" PRIx64)
#else
# 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_int((tcp), (addr), "%#x")
#endif
extern bool printpair_int(struct tcb *, long, const char *)
ATTRIBUTE_FORMAT((printf, 3, 0));
extern bool printpair_int64(struct tcb *, long, const char *)
ATTRIBUTE_FORMAT((printf, 3, 0));
extern void printpath(struct tcb *, long);
extern void printpathn(struct tcb *, long, unsigned int);
#define TIMESPEC_TEXT_BUFSIZE \
(sizeof(intmax_t)*3 * 2 + sizeof("{tv_sec=%jd, tv_nsec=%jd}"))
extern void printfd(struct tcb *, int);
extern bool print_sockaddr_by_inode(const unsigned long, const char *);
extern bool print_sockaddr_by_inode_cached(const unsigned long);
extern void print_dirfd(struct tcb *, int);
extern void printsock(struct tcb *, long, int);
extern void print_sock_optmgmt(struct tcb *, long, int);
#ifdef ALPHA
extern void printrusage32(struct tcb *, long);
extern const char *sprint_timeval32(struct tcb *tcp, long);
extern void print_timeval32(struct tcb *tcp, long);
extern void print_timeval32_pair(struct tcb *tcp, long);
extern void print_itimerval32(struct tcb *tcp, long);
#endif
extern void printuid(const char *, const unsigned int);
extern void print_sigset_addr_len(struct tcb *, long, long);
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(struct tcb *, unsigned long, unsigned long, int decode_iov);
extern void tprint_iov_upto(struct tcb *, unsigned long, unsigned long, int decode_iov, unsigned long);
extern void tprint_open_modes(int);
extern const char *sprint_open_modes(int);
extern void print_seccomp_filter(struct tcb *tcp, unsigned long);
extern int block_ioctl(struct tcb *, const unsigned int, long);
extern int evdev_ioctl(struct tcb *, const unsigned int, long);
extern int loop_ioctl(struct tcb *, const unsigned int, long);
extern int mtd_ioctl(struct tcb *, const unsigned int, long);
extern int ptp_ioctl(struct tcb *, const unsigned int, long);
extern int rtc_ioctl(struct tcb *, const unsigned int, long);
extern int scsi_ioctl(struct tcb *, const unsigned int, long);
extern int sock_ioctl(struct tcb *, const unsigned int, long);
extern int term_ioctl(struct tcb *, const unsigned int, long);
extern int ubi_ioctl(struct tcb *, const unsigned int, long);
extern int v4l2_ioctl(struct tcb *, const unsigned int, long);
extern int tv_nz(const struct timeval *);
extern int tv_cmp(const struct timeval *, const struct timeval *);
extern double tv_float(const struct timeval *);
extern void tv_add(struct timeval *, const struct timeval *, const struct timeval *);
extern void tv_sub(struct timeval *, const struct timeval *, const struct timeval *);
extern void tv_mul(struct timeval *, const struct timeval *, int);
extern void tv_div(struct timeval *, const struct timeval *, int);
#ifdef USE_LIBUNWIND
extern void unwind_init(void);
extern void unwind_tcb_init(struct tcb *tcp);
extern void unwind_tcb_fin(struct tcb *tcp);
extern void unwind_cache_invalidate(struct tcb* tcp);
extern void unwind_print_stacktrace(struct tcb* tcp);
extern void unwind_capture_stacktrace(struct tcb* tcp);
#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);
#if SUPPORTED_PERSONALITIES > 1
extern void set_personality(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
#else
# if SUPPORTED_PERSONALITIES == 2 && PERSONALITY0_WORDSIZE == PERSONALITY1_WORDSIZE
# define current_wordsize PERSONALITY0_WORDSIZE
# else
extern unsigned current_wordsize;
# endif
#endif
/* In many, many places we play fast and loose and use
* tprintf("%d", (int) tcp->u_arg[N]) to print fds, pids etc.
* We probably need to use widen_to_long() instead:
*/
#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
# define widen_to_long(v) (current_wordsize == 4 ? (long)(int32_t)(v) : (long)(v))
#else
# define widen_to_long(v) ((long)(v))
#endif
extern const struct_sysent sysent0[];
extern const char *const errnoent0[];
extern const char *const signalent0[];
extern const struct_ioctlent ioctlent0[];
extern qualbits_t *qual_vec[SUPPORTED_PERSONALITIES];
#define qual_flags (qual_vec[current_personality])
#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 unsigned num_quals;
#if SUPPORTED_PERSONALITIES > 1
# include "printers.h"
#else
# include "native_printer_decls.h"
#endif
/*
* If you need non-NULL sysent[scno].sys_func and sysent[scno].sys_name
*/
#define SCNO_IS_VALID(scno) \
((unsigned long)(scno) < nsyscalls && sysent[scno].sys_func)
/* Only ensures that sysent[scno] isn't out of range */
#define SCNO_IN_RANGE(scno) \
((unsigned long)(scno) < nsyscalls)
#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)
#define MPERS_PRINTER_DECL(type, name) type MPERS_FUNC_NAME(name)
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