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 72 const 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 80 extern 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 157 extern 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 285 struct 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) 377 extern uint32_t *const i386_esp_ptr; 378 #elif defined(IA64) 379 extern bool ia64_ia32mode; 380 #elif defined(SPARC) || defined(SPARC64) 381 extern struct pt_regs sparc_regs; 382 #elif defined(ARM) 383 extern struct pt_regs arm_regs; 384 #elif defined(TILE) 385 extern struct pt_regs tile_regs; 386 #elif defined(POWERPC) 387 extern struct pt_regs ppc_regs; 388 #endif 389 390 typedef struct sysent { 391 unsigned nargs; 392 int sys_flags; 393 int (*sys_func)(); 394 const char *sys_name; 395 } struct_sysent; 396 397 typedef struct ioctlent { 398 const char *doth; 399 const char *symbol; 400 unsigned long code; 401 } struct_ioctlent; 402 403 /* Trace Control Block */ 404 struct 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 */ 498 typedef 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) 509 510 struct xlat { 511 int val; 512 const char *str; 513 }; 514 #define XLAT(x) { x, #x } 515 #define XLAT_END { 0, NULL } 516 517 extern const struct xlat open_mode_flags[]; 518 extern const struct xlat addrfams[]; 519 extern const struct xlat struct_user_offsets[]; 520 extern const struct xlat open_access_modes[]; 521 extern 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 */ 552 553 typedef enum { 554 CFLAG_NONE = 0, 555 CFLAG_ONLY_STATS, 556 CFLAG_BOTH 557 } cflag_t; 558 extern cflag_t cflag; 559 extern bool debug_flag; 560 extern bool Tflag; 561 extern bool iflag; 562 extern bool count_wallclock; 563 extern unsigned int qflag; 564 extern bool not_failing_only; 565 extern bool show_fd_path; 566 extern bool hide_log_until_execve; 567 /* are we filtering traces based on paths? */ 568 extern const char **paths_selected; 569 #define tracing_paths (paths_selected != NULL) 570 extern bool need_fork_exec_workarounds; 571 extern unsigned xflag; 572 extern unsigned followfork; 573 #ifdef USE_LIBUNWIND 574 /* if this is true do the stack trace for every system call */ 575 extern bool stack_trace_enabled; 576 #endif 577 extern unsigned ptrace_setoptions; 578 extern unsigned max_strlen; 579 extern unsigned os_release; 580 #undef KERNEL_VERSION 581 #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c)) 582 583 enum bitness_t { BITNESS_CURRENT = 0, BITNESS_32 }; 584 585 void error_msg(const char *fmt, ...) __attribute__ ((format(printf, 1, 2))); 586 void perror_msg(const char *fmt, ...) __attribute__ ((format(printf, 1, 2))); 587 void error_msg_and_die(const char *fmt, ...) __attribute__ ((noreturn, format(printf, 1, 2))); 588 void perror_msg_and_die(const char *fmt, ...) __attribute__ ((noreturn, format(printf, 1, 2))); 589 void 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 */ 596 int strace_vfprintf(FILE *fp, const char *fmt, va_list args); 597 #else 598 # define strace_vfprintf vfprintf 599 #endif 600 601 extern void set_sortby(const char *); 602 extern void set_overhead(int); 603 extern void qualify(const char *); 604 extern void print_pc(struct tcb *); 605 extern int trace_syscall(struct tcb *); 606 extern void count_syscall(struct tcb *, const struct timeval *); 607 extern 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) 620 extern long get_regs_error; 621 # define clear_regs() (get_regs_error = -1) 622 extern 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 628 extern int umoven(struct tcb *, long, int, char *); 629 #define umove(pid, addr, objp) \ 630 umoven((pid), (addr), sizeof(*(objp)), (char *) (objp)) 631 extern int umovestr(struct tcb *, long, int, char *); 632 extern int upeek(int pid, long, long *); 633 #if defined(SPARC) || defined(SPARC64) || defined(IA64) || defined(SH) 634 extern 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 */ 642 extern int setbpt(struct tcb *); 643 extern int clearbpt(struct tcb *); 644 645 extern const char *signame(int); 646 extern void pathtrace_select(const char *); 647 extern int pathtrace_match(struct tcb *); 648 extern int getfdpath(struct tcb *, int, char *, unsigned); 649 650 extern const char *xlookup(const struct xlat *, int); 651 652 extern int string_to_uint(const char *str); 653 extern int string_quote(const char *, char *, long, int); 654 extern 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 666 extern 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) 671 672 extern void printxval(const struct xlat *, int, const char *); 673 extern int printargs(struct tcb *); 674 extern int printargs_lu(struct tcb *); 675 extern int printargs_ld(struct tcb *); 676 extern void addflags(const struct xlat *, int); 677 extern int printflags(const struct xlat *, int, const char *); 678 extern const char *sprintflags(const char *, const struct xlat *, int); 679 extern void dumpiov(struct tcb *, int, long); 680 extern void dumpstr(struct tcb *, long, int); 681 extern void printstr(struct tcb *, long, long); 682 extern void printnum(struct tcb *, long, const char *); 683 extern void printnum_int(struct tcb *, long, const char *); 684 extern void printpath(struct tcb *, long); 685 extern 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 688 extern 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) 693 extern char *sprinttv(char *, struct tcb *, long, enum bitness_t, int special); 694 extern void print_timespec(struct tcb *, long); 695 extern void sprint_timespec(char *, struct tcb *, long); 696 #ifdef HAVE_SIGINFO_T 697 extern void printsiginfo(siginfo_t *, int); 698 extern void printsiginfo_at(struct tcb *tcp, long addr); 699 #endif 700 extern void printfd(struct tcb *, int); 701 extern void print_dirfd(struct tcb *, int); 702 extern void printsock(struct tcb *, long, int); 703 extern void print_sock_optmgmt(struct tcb *, long, int); 704 extern void printrusage(struct tcb *, long); 705 #ifdef ALPHA 706 extern void printrusage32(struct tcb *, long); 707 #endif 708 extern void printuid(const char *, unsigned long); 709 extern void print_sigset_addr_len(struct tcb *, long, long); 710 extern void printsignal(int); 711 extern void tprint_iov(struct tcb *, unsigned long, unsigned long, int decode_iov); 712 extern void tprint_iov_upto(struct tcb *, unsigned long, unsigned long, int decode_iov, unsigned long); 713 extern void tprint_open_modes(mode_t); 714 extern const char *sprint_open_modes(mode_t); 715 extern void print_loff_t(struct tcb *, long); 716 717 extern const struct_ioctlent *ioctl_lookup(long); 718 extern const struct_ioctlent *ioctl_next_match(const struct_ioctlent *); 719 extern int ioctl_decode(struct tcb *, long, long); 720 extern int term_ioctl(struct tcb *, long, long); 721 extern int sock_ioctl(struct tcb *, long, long); 722 extern int proc_ioctl(struct tcb *, int, int); 723 extern int rtc_ioctl(struct tcb *, long, long); 724 extern int scsi_ioctl(struct tcb *, long, long); 725 extern int block_ioctl(struct tcb *, long, long); 726 extern int mtd_ioctl(struct tcb *, long, long); 727 extern int ubi_ioctl(struct tcb *, long, long); 728 extern int loop_ioctl(struct tcb *, long, long); 729 extern int ptp_ioctl(struct tcb *, long, long); 730 731 extern int tv_nz(const struct timeval *); 732 extern int tv_cmp(const struct timeval *, const struct timeval *); 733 extern double tv_float(const struct timeval *); 734 extern void tv_add(struct timeval *, const struct timeval *, const struct timeval *); 735 extern void tv_sub(struct timeval *, const struct timeval *, const struct timeval *); 736 extern void tv_mul(struct timeval *, const struct timeval *, int); 737 extern void tv_div(struct timeval *, const struct timeval *, int); 738 739 #ifdef USE_LIBUNWIND 740 extern void unwind_init(void); 741 extern void unwind_tcb_init(struct tcb *tcp); 742 extern void unwind_tcb_fin(struct tcb *tcp); 743 extern void unwind_cache_invalidate(struct tcb* tcp); 744 extern void unwind_print_stacktrace(struct tcb* tcp); 745 extern 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 */ 765 extern struct tcb *printing_tcp; 766 extern void printleader(struct tcb *); 767 extern void line_ended(void); 768 extern void tabto(void); 769 extern void tprintf(const char *fmt, ...) __attribute__ ((format (printf, 1, 2))); 770 extern void tprints(const char *str); 771 772 #if SUPPORTED_PERSONALITIES > 1 773 extern void set_personality(int personality); 774 extern 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 786 extern 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 799 800 extern const struct_sysent sysent0[]; 801 extern const char *const errnoent0[]; 802 extern const char *const signalent0[]; 803 extern const struct_ioctlent ioctlent0[]; 804 extern qualbits_t *qual_vec[SUPPORTED_PERSONALITIES]; 805 #define qual_flags (qual_vec[current_personality]) 806 #if SUPPORTED_PERSONALITIES > 1 807 extern const struct_sysent *sysent; 808 extern const char *const *errnoent; 809 extern const char *const *signalent; 810 extern const struct_ioctlent *ioctlent; 811 #else 812 # define sysent sysent0 813 # define errnoent errnoent0 814 # define signalent signalent0 815 # define ioctlent ioctlent0 816 #endif 817 extern unsigned nsyscalls; 818 extern unsigned nerrnos; 819 extern unsigned nsignals; 820 extern unsigned nioctlents; 821 extern 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