1/* 2 * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl> 3 * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl> 4 * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30#ifdef HAVE_CONFIG_H 31# include "config.h" 32#endif 33 34#ifdef MIPS 35# include <sgidefs.h> 36# if _MIPS_SIM == _MIPS_SIM_ABI64 37# define LINUX_MIPSN64 38# elif _MIPS_SIM == _MIPS_SIM_NABI32 39# define LINUX_MIPSN32 40# elif _MIPS_SIM == _MIPS_SIM_ABI32 41# define LINUX_MIPSO32 42# else 43# error Unsupported _MIPS_SIM 44# endif 45#endif 46 47#include <features.h> 48#ifdef HAVE_STDBOOL_H 49# include <stdbool.h> 50#endif 51#include <stdint.h> 52#include <inttypes.h> 53#include <sys/types.h> 54#ifdef STDC_HEADERS 55# include <stddef.h> 56#endif 57#include <unistd.h> 58#include <stdlib.h> 59#include <stdio.h> 60/* Open-coding isprint(ch) et al proved more efficient than calling 61 * generalized libc interface. We don't *want* to do non-ASCII anyway. 62 */ 63/* #include <ctype.h> */ 64#include <string.h> 65#include <errno.h> 66#include <signal.h> 67#include <time.h> 68#include <sys/time.h> 69#include <sys/syscall.h> 70 71#ifndef HAVE_STRERROR 72const char *strerror(int); 73#endif 74#ifndef HAVE_STPCPY 75/* Some libc have stpcpy, some don't. Sigh... 76 * Roll our private implementation... 77 */ 78#undef stpcpy 79#define stpcpy strace_stpcpy 80extern char *stpcpy(char *dst, const char *src); 81#endif 82 83#if !defined __GNUC__ 84# define __attribute__(x) /*nothing*/ 85#endif 86 87#ifndef offsetof 88# define offsetof(type, member) \ 89 (((char *) &(((type *) NULL)->member)) - ((char *) (type *) NULL)) 90#endif 91 92#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0])) 93 94/* macros */ 95#ifndef MAX 96# define MAX(a, b) (((a) > (b)) ? (a) : (b)) 97#endif 98#ifndef MIN 99# define MIN(a, b) (((a) < (b)) ? (a) : (b)) 100#endif 101#define CLAMP(val, min, max) MIN(MAX(min, val), max) 102 103/* Glibc has an efficient macro for sigemptyset 104 * (it just does one or two assignments of 0 to internal vector of longs). 105 */ 106#if defined(__GLIBC__) && defined(__sigemptyset) && !defined(sigemptyset) 107# define sigemptyset __sigemptyset 108#endif 109 110/* Configuration section */ 111#ifndef DEFAULT_STRLEN 112/* default maximum # of bytes printed in `printstr', change with -s switch */ 113# define DEFAULT_STRLEN 32 114#endif 115#ifndef DEFAULT_ACOLUMN 116# define DEFAULT_ACOLUMN 40 /* default alignment column for results */ 117#endif 118/* 119 * Maximum number of args to a syscall. 120 * 121 * Make sure that all entries in all syscallent.h files have nargs <= MAX_ARGS! 122 * linux/<ARCH>/syscallent*.h: 123 * all have nargs <= 6 except mips o32 which has nargs <= 7. 124 */ 125#ifndef MAX_ARGS 126# ifdef LINUX_MIPSO32 127# define MAX_ARGS 7 128# else 129# define MAX_ARGS 6 130# endif 131#endif 132/* default sorting method for call profiling */ 133#ifndef DEFAULT_SORTBY 134# define DEFAULT_SORTBY "time" 135#endif 136/* 137 * Experimental code using PTRACE_SEIZE can be enabled here. 138 * This needs Linux kernel 3.4.x or later to work. 139 */ 140#define USE_SEIZE 1 141/* To force NOMMU build, set to 1 */ 142#define NOMMU_SYSTEM 0 143/* 144 * Set to 1 to use speed-optimized vfprintf implementation. 145 * It results in strace using about 5% less CPU in user space 146 * (compared to glibc version). 147 * But strace spends a lot of time in kernel space, 148 * so overall it does not appear to be a significant win. 149 * Thus disabled by default. 150 */ 151#define USE_CUSTOM_PRINTF 0 152 153#ifdef NEED_PTRACE_PROTOTYPE_WORKAROUND 154# define ptrace xptrace 155# include <sys/ptrace.h> 156# undef ptrace 157extern long ptrace(int, int, char *, long); 158#else 159# include <sys/ptrace.h> 160#endif 161 162#if defined(POWERPC) 163# include <asm/ptrace.h> 164#endif 165 166#if defined(TILE) 167# include <asm/ptrace.h> /* struct pt_regs */ 168#endif 169 170#ifndef ERESTARTSYS 171# define ERESTARTSYS 512 172#endif 173#ifndef ERESTARTNOINTR 174# define ERESTARTNOINTR 513 175#endif 176#ifndef ERESTARTNOHAND 177# define ERESTARTNOHAND 514 178#endif 179#ifndef ERESTART_RESTARTBLOCK 180# define ERESTART_RESTARTBLOCK 516 181#endif 182 183#if !HAVE_DECL_PTRACE_SETOPTIONS 184# define PTRACE_SETOPTIONS 0x4200 185#endif 186#if !HAVE_DECL_PTRACE_GETEVENTMSG 187# define PTRACE_GETEVENTMSG 0x4201 188#endif 189#if !HAVE_DECL_PTRACE_GETSIGINFO 190# define PTRACE_GETSIGINFO 0x4202 191#endif 192 193#if !HAVE_DECL_PTRACE_O_TRACESYSGOOD 194# define PTRACE_O_TRACESYSGOOD 0x00000001 195#endif 196#if !HAVE_DECL_PTRACE_O_TRACEFORK 197# define PTRACE_O_TRACEFORK 0x00000002 198#endif 199#if !HAVE_DECL_PTRACE_O_TRACEVFORK 200# define PTRACE_O_TRACEVFORK 0x00000004 201#endif 202#if !HAVE_DECL_PTRACE_O_TRACECLONE 203# define PTRACE_O_TRACECLONE 0x00000008 204#endif 205#if !HAVE_DECL_PTRACE_O_TRACEEXEC 206# define PTRACE_O_TRACEEXEC 0x00000010 207#endif 208#if !HAVE_DECL_PTRACE_O_TRACEEXIT 209# define PTRACE_O_TRACEEXIT 0x00000040 210#endif 211 212#if !HAVE_DECL_PTRACE_EVENT_FORK 213# define PTRACE_EVENT_FORK 1 214#endif 215#if !HAVE_DECL_PTRACE_EVENT_VFORK 216# define PTRACE_EVENT_VFORK 2 217#endif 218#if !HAVE_DECL_PTRACE_EVENT_CLONE 219# define PTRACE_EVENT_CLONE 3 220#endif 221#if !HAVE_DECL_PTRACE_EVENT_EXEC 222# define PTRACE_EVENT_EXEC 4 223#endif 224#if !HAVE_DECL_PTRACE_EVENT_VFORK_DONE 225# define PTRACE_EVENT_VFORK_DONE 5 226#endif 227#if !HAVE_DECL_PTRACE_EVENT_EXIT 228# define PTRACE_EVENT_EXIT 6 229#endif 230 231#if !HAVE_DECL_PTRACE_PEEKUSER 232# define PTRACE_PEEKUSER PTRACE_PEEKUSR 233#endif 234#if !HAVE_DECL_PTRACE_POKEUSER 235# define PTRACE_POKEUSER PTRACE_POKEUSR 236#endif 237 238#undef PTRACE_SEIZE 239#define PTRACE_SEIZE 0x4206 240#undef PTRACE_INTERRUPT 241#define PTRACE_INTERRUPT 0x4207 242#undef PTRACE_LISTEN 243#define PTRACE_LISTEN 0x4208 244#undef PTRACE_EVENT_STOP 245#define PTRACE_EVENT_STOP 128 246 247#ifdef ALPHA 248# define REG_R0 0 249# define REG_A0 16 250# define REG_A3 19 251# define REG_FP 30 252# define REG_PC 64 253#endif /* ALPHA */ 254#ifdef MIPS 255# define REG_V0 2 256# define REG_A0 4 257# define REG_A3 7 258# define REG_SP 29 259# define REG_EPC 64 260#endif /* MIPS */ 261#ifdef HPPA 262# define PT_GR20 (20*4) 263# define PT_GR26 (26*4) 264# define PT_GR28 (28*4) 265# define PT_IAOQ0 (106*4) 266# define PT_IAOQ1 (107*4) 267#endif /* HPPA */ 268#ifdef SH64 269 /* SH64 Linux - this code assumes the following kernel API for system calls: 270 PC Offset 0 271 System Call Offset 16 (actually, (syscall no.) | (0x1n << 16), 272 where n = no. of parameters. 273 Other regs Offset 24+ 274 275 On entry: R2-7 = parameters 1-6 (as many as necessary) 276 On return: R9 = result. */ 277 278 /* Offset for peeks of registers */ 279# define REG_OFFSET (24) 280# define REG_GENERAL(x) (8*(x)+REG_OFFSET) 281# define REG_PC (0*8) 282# define REG_SYSCALL (2*8) 283#endif /* SH64 */ 284#ifdef AARCH64 285struct arm_pt_regs { 286 int uregs[18]; 287}; 288# define ARM_cpsr uregs[16] 289# define ARM_pc uregs[15] 290# define ARM_lr uregs[14] 291# define ARM_sp uregs[13] 292# define ARM_ip uregs[12] 293# define ARM_fp uregs[11] 294# define ARM_r10 uregs[10] 295# define ARM_r9 uregs[9] 296# define ARM_r8 uregs[8] 297# define ARM_r7 uregs[7] 298# define ARM_r6 uregs[6] 299# define ARM_r5 uregs[5] 300# define ARM_r4 uregs[4] 301# define ARM_r3 uregs[3] 302# define ARM_r2 uregs[2] 303# define ARM_r1 uregs[1] 304# define ARM_r0 uregs[0] 305# define ARM_ORIG_r0 uregs[17] 306#endif /* AARCH64 */ 307 308#if defined(SPARC) || defined(SPARC64) 309/* Indexes into the pt_regs.u_reg[] array -- UREG_XX from kernel are all off 310 * by 1 and use Ix instead of Ox. These work for both 32 and 64 bit Linux. */ 311# define U_REG_G1 0 312# define U_REG_O0 7 313# define U_REG_O1 8 314# define PERSONALITY0_WORDSIZE 4 315# define PERSONALITY1_WORDSIZE 4 316# if defined(SPARC64) 317# include <asm/psrcompat.h> 318# define SUPPORTED_PERSONALITIES 3 319# define PERSONALITY2_WORDSIZE 8 320# else 321# include <asm/psr.h> 322# define SUPPORTED_PERSONALITIES 2 323# endif /* SPARC64 */ 324#endif /* SPARC[64] */ 325 326#ifdef X86_64 327# define SUPPORTED_PERSONALITIES 3 328# define PERSONALITY0_WORDSIZE 8 329# define PERSONALITY1_WORDSIZE 4 330# define PERSONALITY2_WORDSIZE 4 331#endif 332 333#ifdef X32 334# define SUPPORTED_PERSONALITIES 2 335# define PERSONALITY0_WORDSIZE 4 336# define PERSONALITY1_WORDSIZE 4 337#endif 338 339#ifdef ARM 340/* one personality */ 341#endif 342 343#ifdef AARCH64 344/* The existing ARM personality, then AArch64 */ 345# define SUPPORTED_PERSONALITIES 2 346# define PERSONALITY0_WORDSIZE 4 347# define PERSONALITY1_WORDSIZE 8 348# define DEFAULT_PERSONALITY 1 349#endif 350 351#ifdef POWERPC64 352# define SUPPORTED_PERSONALITIES 2 353# define PERSONALITY0_WORDSIZE 8 354# define PERSONALITY1_WORDSIZE 4 355#endif 356 357#ifdef TILE 358# define SUPPORTED_PERSONALITIES 2 359# define PERSONALITY0_WORDSIZE 8 360# define PERSONALITY1_WORDSIZE 4 361# ifdef __tilepro__ 362# define DEFAULT_PERSONALITY 1 363# endif 364#endif 365 366#ifndef SUPPORTED_PERSONALITIES 367# define SUPPORTED_PERSONALITIES 1 368#endif 369#ifndef DEFAULT_PERSONALITY 370# define DEFAULT_PERSONALITY 0 371#endif 372#ifndef PERSONALITY0_WORDSIZE 373# define PERSONALITY0_WORDSIZE SIZEOF_LONG 374#endif 375 376#if defined(I386) || defined(X86_64) 377extern uint32_t *const i386_esp_ptr; 378#elif defined(IA64) 379extern bool ia64_ia32mode; 380#elif defined(SPARC) || defined(SPARC64) 381extern struct pt_regs sparc_regs; 382#elif defined(ARM) 383extern struct pt_regs arm_regs; 384#elif defined(TILE) 385extern struct pt_regs tile_regs; 386#elif defined(POWERPC) 387extern struct pt_regs ppc_regs; 388#endif 389 390typedef struct sysent { 391 unsigned nargs; 392 int sys_flags; 393 int (*sys_func)(); 394 const char *sys_name; 395} struct_sysent; 396 397typedef struct ioctlent { 398 const char *doth; 399 const char *symbol; 400 unsigned long code; 401} struct_ioctlent; 402 403/* Trace Control Block */ 404struct tcb { 405 int flags; /* See below for TCB_ values */ 406 int pid; /* If 0, this tcb is free */ 407 int qual_flg; /* qual_flags[scno] or DEFAULT_QUAL_FLAGS + RAW */ 408 int u_error; /* Error code */ 409 long scno; /* System call number */ 410 long u_arg[MAX_ARGS]; /* System call arguments */ 411#if defined(LINUX_MIPSN32) || defined(X32) 412 long long ext_arg[MAX_ARGS]; 413 long long u_lrval; /* long long return value */ 414#endif 415 long u_rval; /* Return value */ 416#if SUPPORTED_PERSONALITIES > 1 417 int currpers; /* Personality at the time of scno update */ 418#endif 419 int curcol; /* Output column for this process */ 420 FILE *outf; /* Output file for this process */ 421 const char *auxstr; /* Auxiliary info from syscall (see RVAL_STR) */ 422 const struct_sysent *s_ent; /* sysent[scno] or dummy struct for bad scno */ 423 struct timeval stime; /* System time usage as of last process wait */ 424 struct timeval dtime; /* Delta for system time usage */ 425 struct timeval etime; /* Syscall entry time */ 426 /* Support for tracing forked processes: */ 427 long inst[2]; /* Saved clone args (badly named) */ 428 429#ifdef USE_LIBUNWIND 430 struct UPT_info* libunwind_ui; 431 struct mmap_cache_t* mmap_cache; 432 unsigned int mmap_cache_size; 433 unsigned int mmap_cache_generation; 434 struct queue_t* queue; 435#endif 436}; 437 438/* TCB flags */ 439/* We have attached to this process, but did not see it stopping yet */ 440#define TCB_STARTUP 0x01 441#define TCB_IGNORE_ONE_SIGSTOP 0x02 /* Next SIGSTOP is to be ignored */ 442/* 443 * Are we in system call entry or in syscall exit? 444 * 445 * This bit is set after all syscall entry processing is done. 446 * Therefore, this bit will be set when next ptrace stop occurs, 447 * which should be syscall exit stop. Other stops which are possible 448 * directly after syscall entry (death, ptrace event stop) 449 * are simpler and handled without calling trace_syscall(), therefore 450 * the places where TCB_INSYSCALL can be set but we aren't in syscall stop 451 * are limited to trace(), this condition is never observed in trace_syscall() 452 * and below. 453 * The bit is cleared after all syscall exit processing is done. 454 * User-generated SIGTRAPs and post-execve SIGTRAP make it necessary 455 * to be very careful and NOT set TCB_INSYSCALL bit when they are encountered. 456 * TCB_WAITEXECVE bit is used for this purpose (see below). 457 * 458 * Use entering(tcp) / exiting(tcp) to check this bit to make code more readable. 459 */ 460#define TCB_INSYSCALL 0x04 461#define TCB_ATTACHED 0x08 /* We attached to it already */ 462#define TCB_BPTSET 0x10 /* "Breakpoint" set after fork(2) */ 463#define TCB_REPRINT 0x20 /* We should reprint this syscall on exit */ 464#define TCB_FILTERED 0x40 /* This system call has been filtered out */ 465/* 466 * x86 does not need TCB_WAITEXECVE. 467 * It can detect post-execve SIGTRAP by looking at eax/rax. 468 * See "not a syscall entry (eax = %ld)\n" message. 469 * 470 * Note! On new kernels (about 2.5.46+), we use PTRACE_O_TRACEEXEC, which 471 * suppresses post-execve SIGTRAP. If you are adding a new arch which is 472 * only supported by newer kernels, you most likely don't need to define 473 * TCB_WAITEXECVE! 474 */ 475#if defined(ALPHA) \ 476 || defined(SPARC) || defined(SPARC64) \ 477 || defined(POWERPC) \ 478 || defined(IA64) \ 479 || defined(HPPA) \ 480 || defined(SH) || defined(SH64) \ 481 || defined(S390) || defined(S390X) \ 482 || defined(ARM) \ 483 || defined(MIPS) 484/* This tracee has entered into execve syscall. Expect post-execve SIGTRAP 485 * to happen. (When it is detected, tracee is continued and this bit is cleared.) 486 */ 487# define TCB_WAITEXECVE 0x80 488#endif 489 490/* qualifier flags */ 491#define QUAL_TRACE 0x001 /* this system call should be traced */ 492#define QUAL_ABBREV 0x002 /* abbreviate the structures of this syscall */ 493#define QUAL_VERBOSE 0x004 /* decode the structures of this syscall */ 494#define QUAL_RAW 0x008 /* print all args in hex for this syscall */ 495#define QUAL_SIGNAL 0x010 /* report events with this signal */ 496#define QUAL_READ 0x020 /* dump data read on this file descriptor */ 497#define QUAL_WRITE 0x040 /* dump data written to this file descriptor */ 498typedef uint8_t qualbits_t; 499#define UNDEFINED_SCNO 0x100 /* Used only in tcp->qual_flg */ 500 501#define DEFAULT_QUAL_FLAGS (QUAL_TRACE | QUAL_ABBREV | QUAL_VERBOSE) 502 503#define entering(tcp) (!((tcp)->flags & TCB_INSYSCALL)) 504#define exiting(tcp) ((tcp)->flags & TCB_INSYSCALL) 505#define syserror(tcp) ((tcp)->u_error != 0) 506#define verbose(tcp) ((tcp)->qual_flg & QUAL_VERBOSE) 507#define abbrev(tcp) ((tcp)->qual_flg & QUAL_ABBREV) 508#define filtered(tcp) ((tcp)->flags & TCB_FILTERED) 509 510struct xlat { 511 int val; 512 const char *str; 513}; 514#define XLAT(x) { x, #x } 515#define XLAT_END { 0, NULL } 516 517extern const struct xlat open_mode_flags[]; 518extern const struct xlat addrfams[]; 519extern const struct xlat struct_user_offsets[]; 520extern const struct xlat open_access_modes[]; 521extern const struct xlat whence_codes[]; 522 523/* Format of syscall return values */ 524#define RVAL_DECIMAL 000 /* decimal format */ 525#define RVAL_HEX 001 /* hex format */ 526#define RVAL_OCTAL 002 /* octal format */ 527#define RVAL_UDECIMAL 003 /* unsigned decimal format */ 528#if defined(LINUX_MIPSN32) || defined(X32) 529# if 0 /* unused so far */ 530# define RVAL_LDECIMAL 004 /* long decimal format */ 531# define RVAL_LHEX 005 /* long hex format */ 532# define RVAL_LOCTAL 006 /* long octal format */ 533# endif 534# define RVAL_LUDECIMAL 007 /* long unsigned decimal format */ 535#endif 536#define RVAL_FD 010 /* file descriptor */ 537#define RVAL_MASK 017 /* mask for these values */ 538 539#define RVAL_STR 020 /* Print `auxstr' field after return val */ 540#define RVAL_NONE 040 /* Print nothing */ 541 542#define TRACE_FILE 001 /* Trace file-related syscalls. */ 543#define TRACE_IPC 002 /* Trace IPC-related syscalls. */ 544#define TRACE_NETWORK 004 /* Trace network-related syscalls. */ 545#define TRACE_PROCESS 010 /* Trace process-related syscalls. */ 546#define TRACE_SIGNAL 020 /* Trace signal-related syscalls. */ 547#define TRACE_DESC 040 /* Trace file descriptor-related syscalls. */ 548#define TRACE_MEMORY 0100 /* Trace memory mapping-related syscalls. */ 549#define SYSCALL_NEVER_FAILS 0200 /* Syscall is always successful. */ 550#define STACKTRACE_INVALIDATE_CACHE 0400 /* Trigger proc/maps cache updating */ 551#define STACKTRACE_CAPTURE_ON_ENTER 01000 /* Capture stacktrace on "entering" stage */ 552 553typedef enum { 554 CFLAG_NONE = 0, 555 CFLAG_ONLY_STATS, 556 CFLAG_BOTH 557} cflag_t; 558extern cflag_t cflag; 559extern bool debug_flag; 560extern bool Tflag; 561extern bool iflag; 562extern bool count_wallclock; 563extern unsigned int qflag; 564extern bool not_failing_only; 565extern bool show_fd_path; 566extern bool hide_log_until_execve; 567/* are we filtering traces based on paths? */ 568extern const char **paths_selected; 569#define tracing_paths (paths_selected != NULL) 570extern bool need_fork_exec_workarounds; 571extern unsigned xflag; 572extern unsigned followfork; 573#ifdef USE_LIBUNWIND 574/* if this is true do the stack trace for every system call */ 575extern bool stack_trace_enabled; 576#endif 577extern unsigned ptrace_setoptions; 578extern unsigned max_strlen; 579extern unsigned os_release; 580#undef KERNEL_VERSION 581#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c)) 582 583enum bitness_t { BITNESS_CURRENT = 0, BITNESS_32 }; 584 585void error_msg(const char *fmt, ...) __attribute__ ((format(printf, 1, 2))); 586void perror_msg(const char *fmt, ...) __attribute__ ((format(printf, 1, 2))); 587void error_msg_and_die(const char *fmt, ...) __attribute__ ((noreturn, format(printf, 1, 2))); 588void perror_msg_and_die(const char *fmt, ...) __attribute__ ((noreturn, format(printf, 1, 2))); 589void die_out_of_memory(void) __attribute__ ((noreturn)); 590 591#if USE_CUSTOM_PRINTF 592/* 593 * See comment in vsprintf.c for allowed formats. 594 * Short version: %h[h]u, %zu, %tu are not allowed, use %[l[l]]u. 595 */ 596int strace_vfprintf(FILE *fp, const char *fmt, va_list args); 597#else 598# define strace_vfprintf vfprintf 599#endif 600 601extern void set_sortby(const char *); 602extern void set_overhead(int); 603extern void qualify(const char *); 604extern void print_pc(struct tcb *); 605extern int trace_syscall(struct tcb *); 606extern void count_syscall(struct tcb *, const struct timeval *); 607extern void call_summary(FILE *); 608 609#if defined(AVR32) \ 610 || defined(I386) \ 611 || defined(X86_64) || defined(X32) \ 612 || defined(AARCH64) \ 613 || defined(ARM) \ 614 || defined(SPARC) || defined(SPARC64) \ 615 || defined(TILE) \ 616 || defined(OR1K) \ 617 || defined(METAG) \ 618 || defined(ARC) \ 619 || defined(POWERPC) 620extern long get_regs_error; 621# define clear_regs() (get_regs_error = -1) 622extern void get_regs(pid_t pid); 623#else 624# define get_regs_error 0 625# define clear_regs() ((void)0) 626# define get_regs(pid) ((void)0) 627#endif 628extern int umoven(struct tcb *, long, int, char *); 629#define umove(pid, addr, objp) \ 630 umoven((pid), (addr), sizeof(*(objp)), (char *) (objp)) 631extern int umovestr(struct tcb *, long, int, char *); 632extern int upeek(int pid, long, long *); 633#if defined(SPARC) || defined(SPARC64) || defined(IA64) || defined(SH) 634extern long getrval2(struct tcb *); 635#endif 636/* 637 * On Linux, "setbpt" is a misnomer: we don't set a breakpoint 638 * (IOW: no poking in user's text segment), 639 * instead we change fork/vfork/clone into clone(CLONE_PTRACE). 640 * On newer kernels, we use PTRACE_O_TRACECLONE/TRACE[V]FORK instead. 641 */ 642extern int setbpt(struct tcb *); 643extern int clearbpt(struct tcb *); 644 645extern const char *signame(int); 646extern void pathtrace_select(const char *); 647extern int pathtrace_match(struct tcb *); 648extern int getfdpath(struct tcb *, int, char *, unsigned); 649 650extern const char *xlookup(const struct xlat *, int); 651 652extern int string_to_uint(const char *str); 653extern int string_quote(const char *, char *, long, int); 654extern int next_set_bit(const void *bit_array, unsigned cur_bit, unsigned size_bits); 655 656/* a refers to the lower numbered u_arg, 657 * b refers to the higher numbered u_arg 658 */ 659#if HAVE_LITTLE_ENDIAN_LONG_LONG 660# define LONG_LONG(a,b) \ 661 ((long long)((unsigned long long)(unsigned)(a) | ((unsigned long long)(b)<<32))) 662#else 663# define LONG_LONG(a,b) \ 664 ((long long)((unsigned long long)(unsigned)(b) | ((unsigned long long)(a)<<32))) 665#endif 666extern int printllval(struct tcb *, const char *, int, bool); 667#define printllval_aligned(tcp, fmt, arg) \ 668 printllval((tcp), (fmt), (arg), true) 669#define printllval_unaligned(tcp, fmt, arg) \ 670 printllval((tcp), (fmt), (arg), false) 671 672extern void printxval(const struct xlat *, int, const char *); 673extern int printargs(struct tcb *); 674extern int printargs_lu(struct tcb *); 675extern int printargs_ld(struct tcb *); 676extern void addflags(const struct xlat *, int); 677extern int printflags(const struct xlat *, int, const char *); 678extern const char *sprintflags(const char *, const struct xlat *, int); 679extern void dumpiov(struct tcb *, int, long); 680extern void dumpstr(struct tcb *, long, int); 681extern void printstr(struct tcb *, long, long); 682extern void printnum(struct tcb *, long, const char *); 683extern void printnum_int(struct tcb *, long, const char *); 684extern void printpath(struct tcb *, long); 685extern void printpathn(struct tcb *, long, int); 686#define TIMESPEC_TEXT_BUFSIZE (sizeof(long)*3 * 2 + sizeof("{%u, %u}")) 687#define TIMEVAL_TEXT_BUFSIZE TIMESPEC_TEXT_BUFSIZE 688extern void printtv_bitness(struct tcb *, long, enum bitness_t, int); 689#define printtv(tcp, addr) \ 690 printtv_bitness((tcp), (addr), BITNESS_CURRENT, 0) 691#define printtv_special(tcp, addr) \ 692 printtv_bitness((tcp), (addr), BITNESS_CURRENT, 1) 693extern char *sprinttv(char *, struct tcb *, long, enum bitness_t, int special); 694extern void print_timespec(struct tcb *, long); 695extern void sprint_timespec(char *, struct tcb *, long); 696#ifdef HAVE_SIGINFO_T 697extern void printsiginfo(siginfo_t *, int); 698extern void printsiginfo_at(struct tcb *tcp, long addr); 699#endif 700extern void printfd(struct tcb *, int); 701extern void print_dirfd(struct tcb *, int); 702extern void printsock(struct tcb *, long, int); 703extern void print_sock_optmgmt(struct tcb *, long, int); 704extern void printrusage(struct tcb *, long); 705#ifdef ALPHA 706extern void printrusage32(struct tcb *, long); 707#endif 708extern void printuid(const char *, unsigned long); 709extern void print_sigset_addr_len(struct tcb *, long, long); 710extern void printsignal(int); 711extern void tprint_iov(struct tcb *, unsigned long, unsigned long, int decode_iov); 712extern void tprint_iov_upto(struct tcb *, unsigned long, unsigned long, int decode_iov, unsigned long); 713extern void tprint_open_modes(mode_t); 714extern const char *sprint_open_modes(mode_t); 715extern void print_loff_t(struct tcb *, long); 716 717extern const struct_ioctlent *ioctl_lookup(long); 718extern const struct_ioctlent *ioctl_next_match(const struct_ioctlent *); 719extern int ioctl_decode(struct tcb *, long, long); 720extern int term_ioctl(struct tcb *, long, long); 721extern int sock_ioctl(struct tcb *, long, long); 722extern int proc_ioctl(struct tcb *, int, int); 723extern int rtc_ioctl(struct tcb *, long, long); 724extern int scsi_ioctl(struct tcb *, long, long); 725extern int block_ioctl(struct tcb *, long, long); 726extern int mtd_ioctl(struct tcb *, long, long); 727extern int ubi_ioctl(struct tcb *, long, long); 728extern int loop_ioctl(struct tcb *, long, long); 729extern int ptp_ioctl(struct tcb *, long, long); 730 731extern int tv_nz(const struct timeval *); 732extern int tv_cmp(const struct timeval *, const struct timeval *); 733extern double tv_float(const struct timeval *); 734extern void tv_add(struct timeval *, const struct timeval *, const struct timeval *); 735extern void tv_sub(struct timeval *, const struct timeval *, const struct timeval *); 736extern void tv_mul(struct timeval *, const struct timeval *, int); 737extern void tv_div(struct timeval *, const struct timeval *, int); 738 739#ifdef USE_LIBUNWIND 740extern void unwind_init(void); 741extern void unwind_tcb_init(struct tcb *tcp); 742extern void unwind_tcb_fin(struct tcb *tcp); 743extern void unwind_cache_invalidate(struct tcb* tcp); 744extern void unwind_print_stacktrace(struct tcb* tcp); 745extern void unwind_capture_stacktrace(struct tcb* tcp); 746#endif 747 748/* Strace log generation machinery. 749 * 750 * printing_tcp: tcb which has incomplete line being printed right now. 751 * NULL if last line has been completed ('\n'-terminated). 752 * printleader(tcp) examines it, finishes incomplete line if needed, 753 * the sets it to tcp. 754 * line_ended() clears printing_tcp and resets ->curcol = 0. 755 * tcp->curcol == 0 check is also used to detect completeness 756 * of last line, since in -ff mode just checking printing_tcp for NULL 757 * is not enough. 758 * 759 * If you change this code, test log generation in both -f and -ff modes 760 * using: 761 * strace -oLOG -f[f] test/threaded_execve 762 * strace -oLOG -f[f] test/sigkill_rain 763 * strace -oLOG -f[f] -p "`pidof web_browser`" 764 */ 765extern struct tcb *printing_tcp; 766extern void printleader(struct tcb *); 767extern void line_ended(void); 768extern void tabto(void); 769extern void tprintf(const char *fmt, ...) __attribute__ ((format (printf, 1, 2))); 770extern void tprints(const char *str); 771 772#if SUPPORTED_PERSONALITIES > 1 773extern void set_personality(int personality); 774extern unsigned current_personality; 775#else 776# define set_personality(personality) ((void)0) 777# define current_personality 0 778#endif 779 780#if SUPPORTED_PERSONALITIES == 1 781# define current_wordsize PERSONALITY0_WORDSIZE 782#else 783# if SUPPORTED_PERSONALITIES == 2 && PERSONALITY0_WORDSIZE == PERSONALITY1_WORDSIZE 784# define current_wordsize PERSONALITY0_WORDSIZE 785# else 786extern unsigned current_wordsize; 787# endif 788#endif 789 790/* In many, many places we play fast and loose and use 791 * tprintf("%d", (int) tcp->u_arg[N]) to print fds, pids etc. 792 * We probably need to use widen_to_long() instead: 793 */ 794#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4 795# define widen_to_long(v) (current_wordsize == 4 ? (long)(int32_t)(v) : (long)(v)) 796#else 797# define widen_to_long(v) ((long)(v)) 798#endif 799 800extern const struct_sysent sysent0[]; 801extern const char *const errnoent0[]; 802extern const char *const signalent0[]; 803extern const struct_ioctlent ioctlent0[]; 804extern qualbits_t *qual_vec[SUPPORTED_PERSONALITIES]; 805#define qual_flags (qual_vec[current_personality]) 806#if SUPPORTED_PERSONALITIES > 1 807extern const struct_sysent *sysent; 808extern const char *const *errnoent; 809extern const char *const *signalent; 810extern const struct_ioctlent *ioctlent; 811#else 812# define sysent sysent0 813# define errnoent errnoent0 814# define signalent signalent0 815# define ioctlent ioctlent0 816#endif 817extern unsigned nsyscalls; 818extern unsigned nerrnos; 819extern unsigned nsignals; 820extern unsigned nioctlents; 821extern unsigned num_quals; 822 823/* 824 * If you need non-NULL sysent[scno].sys_func and sysent[scno].sys_name 825 */ 826#define SCNO_IS_VALID(scno) \ 827 ((unsigned long)(scno) < nsyscalls && sysent[scno].sys_func) 828 829/* Only ensures that sysent[scno] isn't out of range */ 830#define SCNO_IN_RANGE(scno) \ 831 ((unsigned long)(scno) < nsyscalls) 832