/*
* 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 <signal.h>
#include <time.h>
#include <sys/time.h>
#include <sys/syscall.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
#if defined __GNUC__ && defined __GNUC_MINOR__
# define GNUC_PREREQ(maj, min) \
((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
#else
# define __attribute__(x) /* empty */
# define GNUC_PREREQ(maj, min) 0
#endif
#if GNUC_PREREQ(2, 5)
# define ATTRIBUTE_NORETURN __attribute__((__noreturn__))
#else
# define ATTRIBUTE_NORETURN /* empty */
#endif
#if GNUC_PREREQ(2, 7)
# define ATTRIBUTE_FORMAT(args) __attribute__((__format__ args))
# define ATTRIBUTE_ALIGNED(arg) __attribute__((__aligned__(arg)))
# define ATTRIBUTE_PACKED __attribute__((__packed__))
#else
# define ATTRIBUTE_FORMAT(args) /* empty */
# define ATTRIBUTE_ALIGNED(arg) /* empty */
# define ATTRIBUTE_PACKED /* empty */
#endif
#if GNUC_PREREQ(3, 0)
# define ATTRIBUTE_MALLOC __attribute__((__malloc__))
#else
# define ATTRIBUTE_MALLOC /* empty */
#endif
#if GNUC_PREREQ(3, 1)
# define ATTRIBUTE_NOINLINE __attribute__((__noinline__))
#else
# define ATTRIBUTE_NOINLINE /* empty */
#endif
#if GNUC_PREREQ(4, 3)
# define ATTRIBUTE_ALLOC_SIZE(args) __attribute__((__alloc_size__ args))
#else
# define ATTRIBUTE_ALLOC_SIZE(args) /* empty */
#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
# endif
#endif
#ifdef X86_64
# define SUPPORTED_PERSONALITIES 3
# define PERSONALITY0_WORDSIZE 8
# define PERSONALITY1_WORDSIZE 4
# define PERSONALITY2_WORDSIZE 4
#endif
#ifdef X32
# define SUPPORTED_PERSONALITIES 2
# define PERSONALITY0_WORDSIZE 4
# define PERSONALITY1_WORDSIZE 4
#endif
#ifdef ARM
/* one personality */
#endif
#ifdef AARCH64
/* The existing ARM personality, then AArch64 */
# define SUPPORTED_PERSONALITIES 2
# define PERSONALITY0_WORDSIZE 4
# define PERSONALITY1_WORDSIZE 8
# define DEFAULT_PERSONALITY 1
#endif
#ifdef POWERPC64
# define SUPPORTED_PERSONALITIES 2
# define PERSONALITY0_WORDSIZE 8
# define PERSONALITY1_WORDSIZE 4
#endif
#ifdef TILE
# define SUPPORTED_PERSONALITIES 2
# define PERSONALITY0_WORDSIZE 8
# define PERSONALITY1_WORDSIZE 4
# ifdef __tilepro__
# define DEFAULT_PERSONALITY 1
# 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
typedef struct sysent {
unsigned nargs;
int sys_flags;
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 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 open_access_modes[];
extern const struct xlat open_mode_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 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. */
#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))
enum bitness_t { BITNESS_CURRENT = 0, BITNESS_32 };
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 perror_msg_and_die(const char *fmt, ...)
ATTRIBUTE_FORMAT((printf, 1, 2)) ATTRIBUTE_NORETURN;
void die_out_of_memory(void) ATTRIBUTE_NORETURN;
#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 int umoven(struct tcb *, long, unsigned int, void *);
#define umove(pid, addr, objp) \
umoven((pid), (addr), sizeof(*(objp)), (void *) (objp))
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 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
*/
#if HAVE_LITTLE_ENDIAN_LONG_LONG
# define LONG_LONG(a,b) \
((long long)((unsigned long long)(unsigned)(a) | ((unsigned long long)(b)<<32)))
#else
# define LONG_LONG(a,b) \
((long long)((unsigned long long)(unsigned)(b) | ((unsigned long long)(a)<<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 printxval(const struct xlat *, const unsigned int, const char *);
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);
extern void dumpiov_in_mmsghdr(struct tcb *, long);
extern void dumpiov(struct tcb *, int, long);
extern void dumpstr(struct tcb *, long, int);
extern void printstr(struct tcb *, long, long);
extern void printnum_int(struct tcb *, long, const char *)
ATTRIBUTE_FORMAT((printf, 3, 0));
extern void printnum_long(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(long)*3 * 2 + sizeof("{%u, %u}"))
#define TIMEVAL_TEXT_BUFSIZE TIMESPEC_TEXT_BUFSIZE
extern void printtv_bitness(struct tcb *, long, enum bitness_t, int);
#define printtv(tcp, addr) \
printtv_bitness((tcp), (addr), BITNESS_CURRENT, 0)
#define printtv_special(tcp, addr) \
printtv_bitness((tcp), (addr), BITNESS_CURRENT, 1)
extern char *sprinttv(char *, struct tcb *, long, enum bitness_t, int special);
extern void print_timespec(struct tcb *, long);
extern void sprint_timespec(char *, struct tcb *, long);
extern void printsiginfo(const siginfo_t *, bool);
extern void printsiginfo_at(struct tcb *tcp, long addr);
extern void printfd(struct tcb *, int);
extern bool print_sockaddr_by_inode(const unsigned long, const char *);
extern void print_dirfd(struct tcb *, int);
extern void printsock(struct tcb *, long, int);
extern void print_sock_optmgmt(struct tcb *, long, int);
extern void printrusage(struct tcb *, long);
#ifdef ALPHA
extern void printrusage32(struct tcb *, 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_loff_t(struct tcb *, long);
extern void print_seccomp_filter(struct tcb *tcp, unsigned long);
extern const struct_ioctlent *ioctl_lookup(const unsigned int);
extern const struct_ioctlent *ioctl_next_match(const struct_ioctlent *);
extern void ioctl_print_code(const unsigned int);
extern int ioctl_decode(struct tcb *, const unsigned int, long);
extern int ioctl_decode_command_number(const unsigned int);
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 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)
#ifndef SYS_FUNC_NAME
# define SYS_FUNC_NAME(syscall_name) sys_ ## syscall_name
#endif
#define SYS_FUNC(syscall_name) int SYS_FUNC_NAME(syscall_name)(struct tcb *tcp)