1 2 /*--------------------------------------------------------------------*/ 3 /*--- Startup: the real stuff m_main.c ---*/ 4 /*--------------------------------------------------------------------*/ 5 6 /* 7 This file is part of Valgrind, a dynamic binary instrumentation 8 framework. 9 10 Copyright (C) 2000-2015 Julian Seward 11 jseward (at) acm.org 12 13 This program is free software; you can redistribute it and/or 14 modify it under the terms of the GNU General Public License as 15 published by the Free Software Foundation; either version 2 of the 16 License, or (at your option) any later version. 17 18 This program is distributed in the hope that it will be useful, but 19 WITHOUT ANY WARRANTY; without even the implied warranty of 20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 21 General Public License for more details. 22 23 You should have received a copy of the GNU General Public License 24 along with this program; if not, write to the Free Software 25 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 26 02111-1307, USA. 27 28 The GNU General Public License is contained in the file COPYING. 29 */ 30 31 #include "pub_core_basics.h" 32 #include "pub_core_vki.h" 33 #include "pub_core_vkiscnums.h" 34 #include "pub_core_threadstate.h" 35 #include "pub_core_xarray.h" 36 #include "pub_core_clientstate.h" 37 #include "pub_core_aspacemgr.h" 38 #include "pub_core_aspacehl.h" 39 #include "pub_core_commandline.h" 40 #include "pub_core_debuglog.h" 41 #include "pub_core_errormgr.h" 42 #include "pub_core_execontext.h" 43 #include "pub_core_gdbserver.h" 44 #include "pub_core_initimg.h" 45 #include "pub_core_libcbase.h" 46 #include "pub_core_libcassert.h" 47 #include "pub_core_libcfile.h" 48 #include "pub_core_libcprint.h" 49 #include "pub_core_libcproc.h" 50 #include "pub_core_libcsignal.h" 51 #include "pub_core_sbprofile.h" 52 #include "pub_core_syscall.h" // VG_(strerror) 53 #include "pub_core_mach.h" 54 #include "pub_core_machine.h" 55 #include "pub_core_mallocfree.h" 56 #include "pub_core_options.h" 57 #include "pub_core_debuginfo.h" 58 #include "pub_core_redir.h" 59 #include "pub_core_scheduler.h" 60 #include "pub_core_seqmatch.h" // For VG_(string_match) 61 #include "pub_core_signals.h" 62 #include "pub_core_stacks.h" // For VG_(register_stack) 63 #include "pub_core_syswrap.h" 64 #include "pub_core_tooliface.h" 65 #include "pub_core_translate.h" // For VG_(translate) 66 #include "pub_core_trampoline.h" 67 #include "pub_core_transtab.h" 68 #include "pub_core_inner.h" 69 #if defined(ENABLE_INNER_CLIENT_REQUEST) 70 #include "pub_core_clreq.h" 71 #endif 72 73 74 /*====================================================================*/ 75 /*=== Command-line: variables, processing, etc ===*/ 76 /*====================================================================*/ 77 78 // See pub_{core,tool}_options.h for explanations of all these. 79 80 static void usage_NORETURN ( Bool debug_help ) 81 { 82 /* 'usage1' contains a %s 83 - for the name of the GDB executable 84 - for the name of vgdb's path prefix 85 which must be supplied when they are VG_(printf)'d. */ 86 const HChar usage1[] = 87 "usage: valgrind [options] prog-and-args\n" 88 "\n" 89 " tool-selection option, with default in [ ]:\n" 90 " --tool=<name> use the Valgrind tool named <name> [memcheck]\n" 91 "\n" 92 " basic user options for all Valgrind tools, with defaults in [ ]:\n" 93 " -h --help show this message\n" 94 " --help-debug show this message, plus debugging options\n" 95 " --version show version\n" 96 " -q --quiet run silently; only print error msgs\n" 97 " -v --verbose be more verbose -- show misc extra info\n" 98 " --trace-children=no|yes Valgrind-ise child processes (follow execve)? [no]\n" 99 " --trace-children-skip=patt1,patt2,... specifies a list of executables\n" 100 " that --trace-children=yes should not trace into\n" 101 " --trace-children-skip-by-arg=patt1,patt2,... same as --trace-children-skip=\n" 102 " but check the argv[] entries for children, rather\n" 103 " than the exe name, to make a follow/no-follow decision\n" 104 " --child-silent-after-fork=no|yes omit child output between fork & exec? [no]\n" 105 " --vgdb=no|yes|full activate gdbserver? [yes]\n" 106 " full is slower but provides precise watchpoint/step\n" 107 " --vgdb-error=<number> invoke gdbserver after <number> errors [%d]\n" 108 " to get started quickly, use --vgdb-error=0\n" 109 " and follow the on-screen directions\n" 110 " --vgdb-stop-at=event1,event2,... invoke gdbserver for given events [none]\n" 111 " where event is one of:\n" 112 " startup exit valgrindabexit all none\n" 113 " --track-fds=no|yes track open file descriptors? [no]\n" 114 " --time-stamp=no|yes add timestamps to log messages? [no]\n" 115 " --log-fd=<number> log messages to file descriptor [2=stderr]\n" 116 " --log-file=<file> log messages to <file>\n" 117 " --log-socket=ipaddr:port log messages to socket ipaddr:port\n" 118 "\n" 119 " user options for Valgrind tools that report errors:\n" 120 " --xml=yes emit error output in XML (some tools only)\n" 121 " --xml-fd=<number> XML output to file descriptor\n" 122 " --xml-file=<file> XML output to <file>\n" 123 " --xml-socket=ipaddr:port XML output to socket ipaddr:port\n" 124 " --xml-user-comment=STR copy STR verbatim into XML output\n" 125 " --demangle=no|yes automatically demangle C++ names? [yes]\n" 126 " --num-callers=<number> show <number> callers in stack traces [12]\n" 127 " --error-limit=no|yes stop showing new errors if too many? [yes]\n" 128 " --error-exitcode=<number> exit code to return if errors found [0=disable]\n" 129 " --error-markers=<begin>,<end> add lines with begin/end markers before/after\n" 130 " each error output in plain text mode [none]\n" 131 " --show-below-main=no|yes continue stack traces below main() [no]\n" 132 " --default-suppressions=yes|no\n" 133 " load default suppressions [yes]\n" 134 " --suppressions=<filename> suppress errors described in <filename>\n" 135 " --gen-suppressions=no|yes|all print suppressions for errors? [no]\n" 136 " --input-fd=<number> file descriptor for input [0=stdin]\n" 137 " --dsymutil=no|yes run dsymutil on Mac OS X when helpful? [yes]\n" 138 " --max-stackframe=<number> assume stack switch for SP changes larger\n" 139 " than <number> bytes [2000000]\n" 140 " --main-stacksize=<number> set size of main thread's stack (in bytes)\n" 141 " [min(max(current 'ulimit' value,1MB),16MB)]\n" 142 "\n" 143 " user options for Valgrind tools that replace malloc:\n" 144 " --alignment=<number> set minimum alignment of heap allocations [%s]\n" 145 " --redzone-size=<number> set minimum size of redzones added before/after\n" 146 " heap blocks (in bytes). [%s]\n" 147 "\n" 148 " uncommon user options for all Valgrind tools:\n" 149 " --fullpath-after= (with nothing after the '=')\n" 150 " show full source paths in call stacks\n" 151 " --fullpath-after=string like --fullpath-after=, but only show the\n" 152 " part of the path after 'string'. Allows removal\n" 153 " of path prefixes. Use this flag multiple times\n" 154 " to specify a set of prefixes to remove.\n" 155 " --extra-debuginfo-path=path absolute path to search for additional\n" 156 " debug symbols, in addition to existing default\n" 157 " well known search paths.\n" 158 " --debuginfo-server=ipaddr:port also query this server\n" 159 " (valgrind-di-server) for debug symbols\n" 160 " --allow-mismatched-debuginfo=no|yes [no]\n" 161 " for the above two flags only, accept debuginfo\n" 162 " objects that don't \"match\" the main object\n" 163 " --smc-check=none|stack|all|all-non-file [all-non-file]\n" 164 " checks for self-modifying code: none, only for\n" 165 " code found in stacks, for all code, or for all\n" 166 " code except that from file-backed mappings\n" 167 " --read-inline-info=yes|no read debug info about inlined function calls\n" 168 " and use it to do better stack traces. [yes]\n" 169 " on Linux/Android/Solaris for Memcheck/Helgrind/DRD\n" 170 " only. [no] for all other tools and platforms.\n" 171 " --read-var-info=yes|no read debug info on stack and global variables\n" 172 " and use it to print better error messages in\n" 173 " tools that make use of it (Memcheck, Helgrind,\n" 174 " DRD) [no]\n" 175 " --vgdb-poll=<number> gdbserver poll max every <number> basic blocks [%d] \n" 176 " --vgdb-shadow-registers=no|yes let gdb see the shadow registers [no]\n" 177 " --vgdb-prefix=<prefix> prefix for vgdb FIFOs [%s]\n" 178 " --run-libc-freeres=no|yes free up glibc memory at exit on Linux? [yes]\n" 179 " --sim-hints=hint1,hint2,... activate unusual sim behaviours [none] \n" 180 " where hint is one of:\n" 181 " lax-ioctls lax-doors fuse-compatible enable-outer\n" 182 " no-inner-prefix no-nptl-pthread-stackcache none\n" 183 " --fair-sched=no|yes|try schedule threads fairly on multicore systems [no]\n" 184 " --kernel-variant=variant1,variant2,...\n" 185 " handle non-standard kernel variants [none]\n" 186 " where variant is one of:\n" 187 " bproc android-no-hw-tls\n" 188 " android-gpu-sgx5xx android-gpu-adreno3xx none\n" 189 " --merge-recursive-frames=<number> merge frames between identical\n" 190 " program counters in max <number> frames) [0]\n" 191 " --num-transtab-sectors=<number> size of translated code cache [%d]\n" 192 " more sectors may increase performance, but use more memory.\n" 193 " --avg-transtab-entry-size=<number> avg size in bytes of a translated\n" 194 " basic block [0, meaning use tool provided default]\n" 195 " --aspace-minaddr=0xPP avoid mapping memory below 0xPP [guessed]\n" 196 " --valgrind-stacksize=<number> size of valgrind (host) thread's stack\n" 197 " (in bytes) [" 198 VG_STRINGIFY(VG_DEFAULT_STACK_ACTIVE_SZB) 199 "]\n" 200 " --show-emwarns=no|yes show warnings about emulation limits? [no]\n" 201 " --require-text-symbol=:sonamepattern:symbolpattern abort run if the\n" 202 " stated shared object doesn't have the stated\n" 203 " text symbol. Patterns can contain ? and *.\n" 204 " --soname-synonyms=syn1=pattern1,syn2=pattern2,... synonym soname\n" 205 " specify patterns for function wrapping or replacement.\n" 206 " To use a non-libc malloc library that is\n" 207 " in the main exe: --soname-synonyms=somalloc=NONE\n" 208 " in libxyzzy.so: --soname-synonyms=somalloc=libxyzzy.so\n" 209 " --sigill-diagnostics=yes|no warn about illegal instructions? [yes]\n" 210 " --unw-stack-scan-thresh=<number> Enable stack-scan unwind if fewer\n" 211 " than <number> good frames found [0, meaning \"disabled\"]\n" 212 " NOTE: stack scanning is only available on arm-linux.\n" 213 " --unw-stack-scan-frames=<number> Max number of frames that can be\n" 214 " recovered by stack scanning [5]\n" 215 " --resync-filter=no|yes|verbose [yes on MacOS, no on other OSes]\n" 216 " attempt to avoid expensive address-space-resync operations\n" 217 " --max-threads=<number> maximum number of threads that valgrind can\n" 218 " handle [%d]\n" 219 "\n"; 220 221 const HChar usage2[] = 222 "\n" 223 " debugging options for all Valgrind tools:\n" 224 " -d show verbose debugging output\n" 225 " --stats=no|yes show tool and core statistics [no]\n" 226 " --sanity-level=<number> level of sanity checking to do [1]\n" 227 " --trace-flags=<XXXXXXXX> show generated code? (X = 0|1) [00000000]\n" 228 " --profile-flags=<XXXXXXXX> ditto, but for profiling (X = 0|1) [00000000]\n" 229 " --profile-interval=<number> show profile every <number> event checks\n" 230 " [0, meaning only at the end of the run]\n" 231 " --trace-notbelow=<number> only show BBs above <number> [999999999]\n" 232 " --trace-notabove=<number> only show BBs below <number> [0]\n" 233 " --trace-syscalls=no|yes show all system calls? [no]\n" 234 " --trace-signals=no|yes show signal handling details? [no]\n" 235 " --trace-symtab=no|yes show symbol table details? [no]\n" 236 " --trace-symtab-patt=<patt> limit debuginfo tracing to obj name <patt>\n" 237 " --trace-cfi=no|yes show call-frame-info details? [no]\n" 238 " --debug-dump=syms mimic /usr/bin/readelf --syms\n" 239 " --debug-dump=line mimic /usr/bin/readelf --debug-dump=line\n" 240 " --debug-dump=frames mimic /usr/bin/readelf --debug-dump=frames\n" 241 " --trace-redir=no|yes show redirection details? [no]\n" 242 " --trace-sched=no|yes show thread scheduler details? [no]\n" 243 " --profile-heap=no|yes profile Valgrind's own space use\n" 244 " --core-redzone-size=<number> set minimum size of redzones added before/after\n" 245 " heap blocks allocated for Valgrind internal use (in bytes) [4]\n" 246 " --wait-for-gdb=yes|no pause on startup to wait for gdb attach\n" 247 " --sym-offsets=yes|no show syms in form 'name+offset' ? [no]\n" 248 " --command-line-only=no|yes only use command line options [no]\n" 249 "\n" 250 " Vex options for all Valgrind tools:\n" 251 " --vex-iropt-verbosity=<0..9> [0]\n" 252 " --vex-iropt-level=<0..2> [2]\n" 253 " --vex-iropt-unroll-thresh=<0..400> [120]\n" 254 " --vex-guest-max-insns=<1..100> [50]\n" 255 " --vex-guest-chase-thresh=<0..99> [10]\n" 256 " --vex-guest-chase-cond=no|yes [no]\n" 257 " Precise exception control. Possible values for 'mode' are as follows\n" 258 " and specify the minimum set of registers guaranteed to be correct\n" 259 " immediately prior to memory access instructions:\n" 260 " sp-at-mem-access stack pointer only\n" 261 " unwindregs-at-mem-access registers needed for stack unwinding\n" 262 " allregs-at-mem-access all registers\n" 263 " allregs-at-each-insn all registers are always correct\n" 264 " Default value for all 3 following flags is [unwindregs-at-mem-access].\n" 265 " --vex-iropt-register-updates=mode setting to use by default\n" 266 " --px-default=mode synonym for --vex-iropt-register-updates\n" 267 " --px-file-backed=mode optional setting for file-backed (non-JIT) code\n" 268 " Tracing and profile control:\n" 269 " --trace-flags and --profile-flags values (omit the middle space):\n" 270 " 1000 0000 show conversion into IR\n" 271 " 0100 0000 show after initial opt\n" 272 " 0010 0000 show after instrumentation\n" 273 " 0001 0000 show after second opt\n" 274 " 0000 1000 show after tree building\n" 275 " 0000 0100 show selecting insns\n" 276 " 0000 0010 show after reg-alloc\n" 277 " 0000 0001 show final assembly\n" 278 " 0000 0000 show summary profile only\n" 279 " (Nb: you need --trace-notbelow and/or --trace-notabove\n" 280 " with --trace-flags for full details)\n" 281 "\n" 282 " debugging options for Valgrind tools that report errors\n" 283 " --dump-error=<number> show translation for basic block associated\n" 284 " with <number>'th error context [0=show none]\n" 285 "\n" 286 " debugging options for Valgrind tools that replace malloc:\n" 287 " --trace-malloc=no|yes show client malloc details? [no]\n" 288 "\n"; 289 290 const HChar usage3[] = 291 "\n" 292 " Extra options read from ~/.valgrindrc, $VALGRIND_OPTS, ./.valgrindrc\n" 293 "\n" 294 " %s is %s\n" 295 " Valgrind is Copyright (C) 2000-2015, and GNU GPL'd, by Julian Seward et al.\n" 296 " LibVEX is Copyright (C) 2004-2015, and GNU GPL'd, by OpenWorks LLP et al.\n" 297 "\n" 298 " Bug reports, feedback, admiration, abuse, etc, to: %s.\n" 299 "\n"; 300 301 HChar default_alignment[30]; // large enough 302 HChar default_redzone_size[30]; // large enough 303 304 // Ensure the message goes to stdout 305 VG_(log_output_sink).fd = 1; 306 VG_(log_output_sink).is_socket = False; 307 308 if (VG_(needs).malloc_replacement) { 309 VG_(sprintf)(default_alignment, "%d", VG_MIN_MALLOC_SZB); 310 VG_(sprintf)(default_redzone_size, "%lu", VG_(tdict).tool_client_redzone_szB); 311 } else { 312 VG_(strcpy)(default_alignment, "not used by this tool"); 313 VG_(strcpy)(default_redzone_size, "not used by this tool"); 314 } 315 /* 'usage1' a type as described after each arg. */ 316 VG_(printf)(usage1, 317 VG_(clo_vgdb_error) /* int */, 318 default_alignment /* char* */, 319 default_redzone_size /* char* */, 320 VG_(clo_vgdb_poll) /* int */, 321 VG_(vgdb_prefix_default)() /* char* */, 322 N_SECTORS_DEFAULT /* int */, 323 MAX_THREADS_DEFAULT /* int */ 324 ); 325 if (VG_(details).name) { 326 VG_(printf)(" user options for %s:\n", VG_(details).name); 327 if (VG_(needs).command_line_options) 328 VG_TDICT_CALL(tool_print_usage); 329 else 330 VG_(printf)(" (none)\n"); 331 } 332 if (debug_help) { 333 VG_(printf)("%s", usage2); 334 335 if (VG_(details).name) { 336 VG_(printf)(" debugging options for %s:\n", VG_(details).name); 337 338 if (VG_(needs).command_line_options) 339 VG_TDICT_CALL(tool_print_debug_usage); 340 else 341 VG_(printf)(" (none)\n"); 342 } 343 } 344 VG_(printf)(usage3, VG_(details).name, VG_(details).copyright_author, 345 VG_BUGS_TO); 346 VG_(exit)(0); 347 } 348 349 350 /* Peer at previously set up VG_(args_for_valgrind) and do some 351 minimal command line processing that must happen early on: 352 353 - show the version string, if requested (-v) 354 - extract any request for help (--help, -h, --help-debug) 355 - get the toolname (--tool=) 356 - set VG_(clo_max_stackframe) (--max-stackframe=) 357 - set VG_(clo_main_stacksize) (--main-stacksize=) 358 - set VG_(clo_sim_hints) (--sim-hints=) 359 - set VG_(clo_max_threads) (--max-threads) 360 361 That's all it does. The main command line processing is done below 362 by main_process_cmd_line_options. Note that 363 main_process_cmd_line_options has to handle but ignore the ones we 364 have handled here. 365 */ 366 static void early_process_cmd_line_options ( /*OUT*/Int* need_help, 367 /*OUT*/const HChar** tool ) 368 { 369 UInt i; 370 HChar* str; 371 372 vg_assert( VG_(args_for_valgrind) ); 373 374 /* parse the options we have (only the options we care about now) */ 375 for (i = 0; i < VG_(sizeXA)( VG_(args_for_valgrind) ); i++) { 376 377 str = * (HChar**) VG_(indexXA)( VG_(args_for_valgrind), i ); 378 vg_assert(str); 379 380 // Nb: the version string goes to stdout. 381 if VG_XACT_CLO(str, "--version", VG_(log_output_sink).fd, 1) { 382 VG_(log_output_sink).is_socket = False; 383 VG_(printf)("valgrind-" VERSION "\n"); 384 VG_(exit)(0); 385 } 386 else if VG_XACT_CLO(str, "--help", *need_help, *need_help+1) {} 387 else if VG_XACT_CLO(str, "-h", *need_help, *need_help+1) {} 388 389 else if VG_XACT_CLO(str, "--help-debug", *need_help, *need_help+2) {} 390 391 // The tool has already been determined, but we need to know the name 392 // here. 393 else if VG_STR_CLO(str, "--tool", *tool) {} 394 395 // Set up VG_(clo_max_stackframe) and VG_(clo_main_stacksize). 396 // These are needed by VG_(ii_create_image), which happens 397 // before main_process_cmd_line_options(). 398 else if VG_INT_CLO(str, "--max-stackframe", VG_(clo_max_stackframe)) {} 399 else if VG_INT_CLO(str, "--main-stacksize", VG_(clo_main_stacksize)) {} 400 401 // Set up VG_(clo_max_threads); needed for VG_(tl_pre_clo_init) 402 else if VG_INT_CLO(str, "--max-threads", VG_(clo_max_threads)) {} 403 404 // Set up VG_(clo_sim_hints). This is needed a.o. for an inner 405 // running in an outer, to have "no-inner-prefix" enabled 406 // as early as possible. 407 else if VG_USETX_CLO (str, "--sim-hints", 408 "lax-ioctls,lax-doors,fuse-compatible," 409 "enable-outer,no-inner-prefix," 410 "no-nptl-pthread-stackcache", 411 VG_(clo_sim_hints)) {} 412 } 413 414 /* For convenience */ 415 VG_N_THREADS = VG_(clo_max_threads); 416 } 417 418 /* The main processing for command line options. See comments above 419 on early_process_cmd_line_options. 420 421 Comments on how the logging options are handled: 422 423 User can specify: 424 --log-fd= for a fd to write to (default setting, fd = 2) 425 --log-file= for a file name to write to 426 --log-socket= for a socket to write to 427 428 As a result of examining these and doing relevant socket/file 429 opening, a final fd is established. This is stored in 430 VG_(log_output_sink) in m_libcprint. Also, if --log-file=STR was 431 specified, then STR, after expansion of %p and %q templates within 432 it, is stored in VG_(clo_log_fname_expanded), in m_options, just in 433 case anybody wants to know what it is. 434 435 When printing, VG_(log_output_sink) is consulted to find the 436 fd to send output to. 437 438 Exactly analogous actions are undertaken for the XML output 439 channel, with the one difference that the default fd is -1, meaning 440 the channel is disabled by default. 441 */ 442 static 443 void main_process_cmd_line_options ( /*OUT*/Bool* logging_to_fd, 444 /*OUT*/const HChar** xml_fname_unexpanded, 445 const HChar* toolname ) 446 { 447 // VG_(clo_log_fd) is used by all the messaging. It starts as 2 (stderr) 448 // and we cannot change it until we know what we are changing it to is 449 // ok. So we have tmp_log_fd to hold the tmp fd prior to that point. 450 SysRes sres; 451 Int i, tmp_log_fd, tmp_xml_fd; 452 Int toolname_len = VG_(strlen)(toolname); 453 const HChar* tmp_str; // Used in a couple of places. 454 enum { 455 VgLogTo_Fd, 456 VgLogTo_File, 457 VgLogTo_Socket 458 } log_to = VgLogTo_Fd, // Where is logging output to be sent? 459 xml_to = VgLogTo_Fd; // Where is XML output to be sent? 460 461 /* Temporarily holds the string STR specified with 462 --{log,xml}-{name,socket}=STR. 'fs' stands for 463 file-or-socket. */ 464 const HChar* log_fsname_unexpanded = NULL; 465 const HChar* xml_fsname_unexpanded = NULL; 466 467 /* Whether the user has explicitly provided --sigill-diagnostics. 468 If not explicitly given depends on general verbosity setting. */ 469 Bool sigill_diag_set = False; 470 471 /* Log to stderr by default, but usage message goes to stdout. XML 472 output is initially disabled. */ 473 tmp_log_fd = 2; 474 tmp_xml_fd = -1; 475 476 /* Check for sane path in ./configure --prefix=... */ 477 if (VG_LIBDIR[0] != '/') 478 VG_(err_config_error)("Please use absolute paths in " 479 "./configure --prefix=... or --libdir=...\n"); 480 481 vg_assert( VG_(args_for_valgrind) ); 482 483 VG_(clo_suppressions) = VG_(newXA)(VG_(malloc), "main.mpclo.4", 484 VG_(free), sizeof(HChar *)); 485 VG_(clo_fullpath_after) = VG_(newXA)(VG_(malloc), "main.mpclo.5", 486 VG_(free), sizeof(HChar *)); 487 VG_(clo_req_tsyms) = VG_(newXA)(VG_(malloc), "main.mpclo.6", 488 VG_(free), sizeof(HChar *)); 489 490 /* Constants for parsing PX control flags. */ 491 const HChar* pxStrings[5] 492 = { "sp-at-mem-access", "unwindregs-at-mem-access", 493 "allregs-at-mem-access", "allregs-at-each-insn", NULL }; 494 const VexRegisterUpdates pxVals[5] 495 = { VexRegUpdSpAtMemAccess, VexRegUpdUnwindregsAtMemAccess, 496 VexRegUpdAllregsAtMemAccess, VexRegUpdAllregsAtEachInsn, 0/*inval*/ }; 497 498 /* BEGIN command-line processing loop */ 499 500 for (i = 0; i < VG_(sizeXA)( VG_(args_for_valgrind) ); i++) { 501 502 HChar* arg = * (HChar**) VG_(indexXA)( VG_(args_for_valgrind), i ); 503 HChar* colon = arg; 504 UInt ix = 0; 505 506 // Look for a colon in the option name. 507 while (*colon && *colon != ':' && *colon != '=') 508 colon++; 509 510 // Does it have the form "--toolname:foo"? We have to do it at the start 511 // in case someone has combined a prefix with a core-specific option, 512 // eg. "--memcheck:verbose". 513 if (*colon == ':') { 514 if (VG_STREQN(2, arg, "--") && 515 VG_STREQN(toolname_len, arg+2, toolname) && 516 VG_STREQN(1, arg+2+toolname_len, ":")) 517 { 518 // Prefix matches, convert "--toolname:foo" to "--foo". 519 // Two things to note: 520 // - We cannot modify the option in-place. If we did, and then 521 // a child was spawned with --trace-children=yes, the 522 // now-non-prefixed option would be passed and could screw up 523 // the child. 524 // - We create copies, and never free them. Why? Non-prefixed 525 // options hang around forever, so tools need not make copies 526 // of strings within them. We need to have the same behaviour 527 // for prefixed options. The pointer to the copy will be lost 528 // once we leave this function (although a tool may keep a 529 // pointer into it), but the space wasted is insignificant. 530 // (In bug #142197, the copies were being freed, which caused 531 // problems for tools that reasonably assumed that arguments 532 // wouldn't disappear on them.) 533 if (0) 534 VG_(printf)("tool-specific arg: %s\n", arg); 535 arg = VG_(strdup)("main.mpclo.1", arg + toolname_len + 1); 536 arg[0] = '-'; 537 arg[1] = '-'; 538 539 } else { 540 // prefix doesn't match, skip to next arg 541 continue; 542 } 543 } 544 545 /* Ignore these options - they've already been handled */ 546 if VG_STREQN( 7, arg, "--tool=") {} 547 else if VG_STREQN(20, arg, "--command-line-only=") {} 548 else if VG_STREQ( arg, "--") {} 549 else if VG_STREQ( arg, "-d") {} 550 else if VG_STREQN(17, arg, "--max-stackframe=") {} 551 else if VG_STREQN(17, arg, "--main-stacksize=") {} 552 else if VG_STREQN(14, arg, "--max-threads=") {} 553 else if VG_STREQN(12, arg, "--sim-hints=") {} 554 else if VG_STREQN(15, arg, "--profile-heap=") {} 555 else if VG_STREQN(20, arg, "--core-redzone-size=") {} 556 else if VG_STREQN(15, arg, "--redzone-size=") {} 557 else if VG_STREQN(17, arg, "--aspace-minaddr=") {} 558 559 else if VG_BINT_CLO(arg, "--valgrind-stacksize", 560 VG_(clo_valgrind_stacksize), 561 2*VKI_PAGE_SIZE, 10*VG_DEFAULT_STACK_ACTIVE_SZB) 562 {VG_(clo_valgrind_stacksize) 563 = VG_PGROUNDUP(VG_(clo_valgrind_stacksize));} 564 565 /* Obsolete options. Report an error and exit */ 566 else if VG_STREQN(34, arg, "--vex-iropt-precise-memory-exns=no") { 567 VG_(fmsg_bad_option) 568 (arg, 569 "--vex-iropt-precise-memory-exns is obsolete\n" 570 "Use --vex-iropt-register-updates=unwindregs-at-mem-access instead\n"); 571 } 572 else if VG_STREQN(35, arg, "--vex-iropt-precise-memory-exns=yes") { 573 VG_(fmsg_bad_option) 574 (arg, 575 "--vex-iropt-precise-memory-exns is obsolete\n" 576 "Use --vex-iropt-register-updates=allregs-at-mem-access instead\n" 577 " (or --vex-iropt-register-updates=allregs-at-each-insn)\n"); 578 } 579 580 // These options are new. 581 else if (VG_STREQ(arg, "-v") || 582 VG_STREQ(arg, "--verbose")) 583 VG_(clo_verbosity)++; 584 585 else if (VG_STREQ(arg, "-q") || 586 VG_STREQ(arg, "--quiet")) 587 VG_(clo_verbosity)--; 588 589 else if VG_BOOL_CLO(arg, "--sigill-diagnostics", VG_(clo_sigill_diag)) 590 sigill_diag_set = True; 591 592 else if VG_BOOL_CLO(arg, "--stats", VG_(clo_stats)) {} 593 else if VG_BOOL_CLO(arg, "--xml", VG_(clo_xml)) 594 VG_(debugLog_setXml)(VG_(clo_xml)); 595 596 else if VG_XACT_CLO(arg, "--vgdb=no", VG_(clo_vgdb), Vg_VgdbNo) {} 597 else if VG_XACT_CLO(arg, "--vgdb=yes", VG_(clo_vgdb), Vg_VgdbYes) {} 598 else if VG_XACT_CLO(arg, "--vgdb=full", VG_(clo_vgdb), Vg_VgdbFull) { 599 /* automatically updates register values at each insn 600 with --vgdb=full */ 601 VG_(clo_vex_control).iropt_register_updates_default 602 = VG_(clo_px_file_backed) 603 = VexRegUpdAllregsAtEachInsn; 604 } 605 else if VG_INT_CLO (arg, "--vgdb-poll", VG_(clo_vgdb_poll)) {} 606 else if VG_INT_CLO (arg, "--vgdb-error", VG_(clo_vgdb_error)) {} 607 else if VG_USET_CLO (arg, "--vgdb-stop-at", 608 "startup,exit,valgrindabexit", 609 VG_(clo_vgdb_stop_at)) {} 610 else if VG_STR_CLO (arg, "--vgdb-prefix", VG_(clo_vgdb_prefix)) { 611 VG_(arg_vgdb_prefix) = arg; 612 } 613 else if VG_BOOL_CLO(arg, "--vgdb-shadow-registers", 614 VG_(clo_vgdb_shadow_registers)) {} 615 else if VG_BOOL_CLO(arg, "--demangle", VG_(clo_demangle)) {} 616 else if VG_STR_CLO (arg, "--soname-synonyms",VG_(clo_soname_synonyms)) {} 617 else if VG_BOOL_CLO(arg, "--error-limit", VG_(clo_error_limit)) {} 618 else if VG_INT_CLO (arg, "--error-exitcode", VG_(clo_error_exitcode)) {} 619 else if VG_STR_CLO (arg, "--error-markers", tmp_str) { 620 Int m; 621 const HChar *startpos = tmp_str; 622 const HChar *nextpos; 623 for (m = 0; 624 m < sizeof(VG_(clo_error_markers)) 625 /sizeof(VG_(clo_error_markers)[0]); 626 m++) { 627 /* Release previous value if clo given multiple times. */ 628 VG_(free)(VG_(clo_error_markers)[m]); 629 VG_(clo_error_markers)[m] = NULL; 630 631 nextpos = VG_(strchr)(startpos, ','); 632 if (!nextpos) 633 nextpos = startpos + VG_(strlen)(startpos); 634 if (startpos != nextpos) { 635 VG_(clo_error_markers)[m] 636 = VG_(malloc)("main.mpclo.2", nextpos - startpos + 1); 637 VG_(memcpy)(VG_(clo_error_markers)[m], startpos, 638 nextpos - startpos); 639 VG_(clo_error_markers)[m][nextpos - startpos] = '\0'; 640 } 641 startpos = *nextpos ? nextpos + 1 : nextpos; 642 } 643 } 644 else if VG_BOOL_CLO(arg, "--show-emwarns", VG_(clo_show_emwarns)) {} 645 646 else if VG_BOOL_CLO(arg, "--run-libc-freeres", VG_(clo_run_libc_freeres)) {} 647 else if VG_BOOL_CLO(arg, "--show-below-main", VG_(clo_show_below_main)) {} 648 else if VG_BOOL_CLO(arg, "--time-stamp", VG_(clo_time_stamp)) {} 649 else if VG_BOOL_CLO(arg, "--track-fds", VG_(clo_track_fds)) {} 650 else if VG_BOOL_CLO(arg, "--trace-children", VG_(clo_trace_children)) {} 651 else if VG_BOOL_CLO(arg, "--child-silent-after-fork", 652 VG_(clo_child_silent_after_fork)) {} 653 else if VG_STR_CLO(arg, "--fair-sched", tmp_str) { 654 if (VG_(strcmp)(tmp_str, "yes") == 0) 655 VG_(clo_fair_sched) = enable_fair_sched; 656 else if (VG_(strcmp)(tmp_str, "try") == 0) 657 VG_(clo_fair_sched) = try_fair_sched; 658 else if (VG_(strcmp)(tmp_str, "no") == 0) 659 VG_(clo_fair_sched) = disable_fair_sched; 660 else 661 VG_(fmsg_bad_option)(arg, 662 "Bad argument, should be 'yes', 'try' or 'no'\n"); 663 } 664 else if VG_BOOL_CLO(arg, "--trace-sched", VG_(clo_trace_sched)) {} 665 else if VG_BOOL_CLO(arg, "--trace-signals", VG_(clo_trace_signals)) {} 666 else if VG_BOOL_CLO(arg, "--trace-symtab", VG_(clo_trace_symtab)) {} 667 else if VG_STR_CLO (arg, "--trace-symtab-patt", VG_(clo_trace_symtab_patt)) {} 668 else if VG_BOOL_CLO(arg, "--trace-cfi", VG_(clo_trace_cfi)) {} 669 else if VG_XACT_CLO(arg, "--debug-dump=syms", VG_(clo_debug_dump_syms), 670 True) {} 671 else if VG_XACT_CLO(arg, "--debug-dump=line", VG_(clo_debug_dump_line), 672 True) {} 673 else if VG_XACT_CLO(arg, "--debug-dump=frames", 674 VG_(clo_debug_dump_frames), True) {} 675 else if VG_BOOL_CLO(arg, "--trace-redir", VG_(clo_trace_redir)) {} 676 677 else if VG_BOOL_CLO(arg, "--trace-syscalls", VG_(clo_trace_syscalls)) {} 678 else if VG_BOOL_CLO(arg, "--wait-for-gdb", VG_(clo_wait_for_gdb)) {} 679 else if VG_BOOL_CLO(arg, "--sym-offsets", VG_(clo_sym_offsets)) {} 680 else if VG_BOOL_CLO(arg, "--read-inline-info", VG_(clo_read_inline_info)) {} 681 else if VG_BOOL_CLO(arg, "--read-var-info", VG_(clo_read_var_info)) {} 682 683 else if VG_INT_CLO (arg, "--dump-error", VG_(clo_dump_error)) {} 684 else if VG_INT_CLO (arg, "--input-fd", VG_(clo_input_fd)) {} 685 else if VG_INT_CLO (arg, "--sanity-level", VG_(clo_sanity_level)) {} 686 else if VG_BINT_CLO(arg, "--num-callers", VG_(clo_backtrace_size), 1, 687 VG_DEEPEST_BACKTRACE) {} 688 else if VG_BINT_CLO(arg, "--num-transtab-sectors", 689 VG_(clo_num_transtab_sectors), 690 MIN_N_SECTORS, MAX_N_SECTORS) {} 691 else if VG_BINT_CLO(arg, "--avg-transtab-entry-size", 692 VG_(clo_avg_transtab_entry_size), 693 50, 5000) {} 694 else if VG_BINT_CLO(arg, "--merge-recursive-frames", 695 VG_(clo_merge_recursive_frames), 0, 696 VG_DEEPEST_BACKTRACE) {} 697 698 else if VG_XACT_CLO(arg, "--smc-check=none", 699 VG_(clo_smc_check), Vg_SmcNone) {} 700 else if VG_XACT_CLO(arg, "--smc-check=stack", 701 VG_(clo_smc_check), Vg_SmcStack) {} 702 else if VG_XACT_CLO(arg, "--smc-check=all", 703 VG_(clo_smc_check), Vg_SmcAll) {} 704 else if VG_XACT_CLO(arg, "--smc-check=all-non-file", 705 VG_(clo_smc_check), Vg_SmcAllNonFile) {} 706 707 else if VG_USETX_CLO (arg, "--kernel-variant", 708 "bproc," 709 "android-no-hw-tls," 710 "android-gpu-sgx5xx," 711 "android-gpu-adreno3xx", 712 VG_(clo_kernel_variant)) {} 713 714 else if VG_BOOL_CLO(arg, "--dsymutil", VG_(clo_dsymutil)) {} 715 716 else if VG_STR_CLO (arg, "--trace-children-skip", 717 VG_(clo_trace_children_skip)) {} 718 else if VG_STR_CLO (arg, "--trace-children-skip-by-arg", 719 VG_(clo_trace_children_skip_by_arg)) {} 720 721 else if VG_BINT_CLO(arg, "--vex-iropt-verbosity", 722 VG_(clo_vex_control).iropt_verbosity, 0, 10) {} 723 else if VG_BINT_CLO(arg, "--vex-iropt-level", 724 VG_(clo_vex_control).iropt_level, 0, 2) {} 725 726 else if VG_STRINDEX_CLO(arg, "--vex-iropt-register-updates", 727 pxStrings, ix) { 728 vg_assert(ix < 4); 729 vg_assert(pxVals[ix] >= VexRegUpdSpAtMemAccess); 730 vg_assert(pxVals[ix] <= VexRegUpdAllregsAtEachInsn); 731 VG_(clo_vex_control).iropt_register_updates_default = pxVals[ix]; 732 } 733 else if VG_STRINDEX_CLO(arg, "--px-default", pxStrings, ix) { 734 // NB: --px-default is an alias for the hard-to-remember 735 // --vex-iropt-register-updates, hence the same logic. 736 vg_assert(ix < 4); 737 vg_assert(pxVals[ix] >= VexRegUpdSpAtMemAccess); 738 vg_assert(pxVals[ix] <= VexRegUpdAllregsAtEachInsn); 739 VG_(clo_vex_control).iropt_register_updates_default = pxVals[ix]; 740 } 741 else if VG_STRINDEX_CLO(arg, "--px-file-backed", pxStrings, ix) { 742 // Whereas --px-file-backed isn't 743 // the same flag as --vex-iropt-register-updates. 744 vg_assert(ix < 4); 745 vg_assert(pxVals[ix] >= VexRegUpdSpAtMemAccess); 746 vg_assert(pxVals[ix] <= VexRegUpdAllregsAtEachInsn); 747 VG_(clo_px_file_backed) = pxVals[ix]; 748 } 749 750 else if VG_BINT_CLO(arg, "--vex-iropt-unroll-thresh", 751 VG_(clo_vex_control).iropt_unroll_thresh, 0, 400) {} 752 else if VG_BINT_CLO(arg, "--vex-guest-max-insns", 753 VG_(clo_vex_control).guest_max_insns, 1, 100) {} 754 else if VG_BINT_CLO(arg, "--vex-guest-chase-thresh", 755 VG_(clo_vex_control).guest_chase_thresh, 0, 99) {} 756 else if VG_BOOL_CLO(arg, "--vex-guest-chase-cond", 757 VG_(clo_vex_control).guest_chase_cond) {} 758 759 else if VG_INT_CLO(arg, "--log-fd", tmp_log_fd) { 760 log_to = VgLogTo_Fd; 761 log_fsname_unexpanded = NULL; 762 } 763 else if VG_INT_CLO(arg, "--xml-fd", tmp_xml_fd) { 764 xml_to = VgLogTo_Fd; 765 xml_fsname_unexpanded = NULL; 766 } 767 768 else if VG_STR_CLO(arg, "--log-file", log_fsname_unexpanded) { 769 log_to = VgLogTo_File; 770 } 771 else if VG_STR_CLO(arg, "--xml-file", xml_fsname_unexpanded) { 772 xml_to = VgLogTo_File; 773 } 774 775 else if VG_STR_CLO(arg, "--log-socket", log_fsname_unexpanded) { 776 log_to = VgLogTo_Socket; 777 } 778 else if VG_STR_CLO(arg, "--xml-socket", xml_fsname_unexpanded) { 779 xml_to = VgLogTo_Socket; 780 } 781 782 else if VG_STR_CLO(arg, "--debuginfo-server", 783 VG_(clo_debuginfo_server)) {} 784 785 else if VG_BOOL_CLO(arg, "--allow-mismatched-debuginfo", 786 VG_(clo_allow_mismatched_debuginfo)) {} 787 788 else if VG_STR_CLO(arg, "--xml-user-comment", 789 VG_(clo_xml_user_comment)) {} 790 791 else if VG_BOOL_CLO(arg, "--default-suppressions", 792 VG_(clo_default_supp)) {} 793 794 else if VG_STR_CLO(arg, "--suppressions", tmp_str) { 795 VG_(addToXA)(VG_(clo_suppressions), &tmp_str); 796 } 797 798 else if VG_STR_CLO (arg, "--fullpath-after", tmp_str) { 799 VG_(addToXA)(VG_(clo_fullpath_after), &tmp_str); 800 } 801 802 else if VG_STR_CLO (arg, "--extra-debuginfo-path", 803 VG_(clo_extra_debuginfo_path)) {} 804 805 else if VG_STR_CLO(arg, "--require-text-symbol", tmp_str) { 806 /* String needs to be of the form C?*C?*, where C is any 807 character, but is the same both times. Having it in this 808 form facilitates finding the boundary between the sopatt 809 and the fnpatt just by looking for the second occurrence 810 of C, without hardwiring any assumption about what C 811 is. */ 812 HChar patt[7]; 813 Bool ok = True; 814 ok = tmp_str && VG_(strlen)(tmp_str) > 0; 815 if (ok) { 816 patt[0] = patt[3] = tmp_str[0]; 817 patt[1] = patt[4] = '?'; 818 patt[2] = patt[5] = '*'; 819 patt[6] = 0; 820 ok = VG_(string_match)(patt, tmp_str); 821 } 822 if (!ok) { 823 VG_(fmsg_bad_option)(arg, 824 "Invalid --require-text-symbol= specification.\n"); 825 } 826 VG_(addToXA)(VG_(clo_req_tsyms), &tmp_str); 827 } 828 829 /* "stuvwxyz" --> stuvwxyz (binary) */ 830 else if VG_STR_CLO(arg, "--trace-flags", tmp_str) { 831 Int j; 832 if (8 != VG_(strlen)(tmp_str)) { 833 VG_(fmsg_bad_option)(arg, 834 "--trace-flags argument must have 8 digits\n"); 835 } 836 for (j = 0; j < 8; j++) { 837 if ('0' == tmp_str[j]) { /* do nothing */ } 838 else if ('1' == tmp_str[j]) VG_(clo_trace_flags) |= (1 << (7-j)); 839 else { 840 VG_(fmsg_bad_option)(arg, 841 "--trace-flags argument can only contain 0s and 1s\n"); 842 } 843 } 844 } 845 846 else if VG_INT_CLO (arg, "--trace-notbelow", VG_(clo_trace_notbelow)) {} 847 848 else if VG_INT_CLO (arg, "--trace-notabove", VG_(clo_trace_notabove)) {} 849 850 /* "stuvwxyz" --> stuvwxyz (binary) */ 851 else if VG_STR_CLO(arg, "--profile-flags", tmp_str) { 852 Int j; 853 if (8 != VG_(strlen)(tmp_str)) { 854 VG_(fmsg_bad_option)(arg, 855 "--profile-flags argument must have 8 digits\n"); 856 } 857 for (j = 0; j < 8; j++) { 858 if ('0' == tmp_str[j]) { /* do nothing */ } 859 else if ('1' == tmp_str[j]) VG_(clo_profyle_flags) |= (1 << (7-j)); 860 else { 861 VG_(fmsg_bad_option)(arg, 862 "--profile-flags argument can only contain 0s and 1s\n"); 863 } 864 } 865 VG_(clo_profyle_sbs) = True; 866 } 867 868 else if VG_INT_CLO (arg, "--profile-interval", 869 VG_(clo_profyle_interval)) {} 870 871 else if VG_XACT_CLO(arg, "--gen-suppressions=no", 872 VG_(clo_gen_suppressions), 0) {} 873 else if VG_XACT_CLO(arg, "--gen-suppressions=yes", 874 VG_(clo_gen_suppressions), 1) {} 875 else if VG_XACT_CLO(arg, "--gen-suppressions=all", 876 VG_(clo_gen_suppressions), 2) {} 877 878 else if VG_BINT_CLO(arg, "--unw-stack-scan-thresh", 879 VG_(clo_unw_stack_scan_thresh), 0, 100) {} 880 else if VG_BINT_CLO(arg, "--unw-stack-scan-frames", 881 VG_(clo_unw_stack_scan_frames), 0, 32) {} 882 883 else if VG_XACT_CLO(arg, "--resync-filter=no", 884 VG_(clo_resync_filter), 0) {} 885 else if VG_XACT_CLO(arg, "--resync-filter=yes", 886 VG_(clo_resync_filter), 1) {} 887 else if VG_XACT_CLO(arg, "--resync-filter=verbose", 888 VG_(clo_resync_filter), 2) {} 889 890 else if ( ! VG_(needs).command_line_options 891 || ! VG_TDICT_CALL(tool_process_cmd_line_option, arg) ) { 892 VG_(fmsg_unknown_option)(arg); 893 } 894 } 895 896 /* END command-line processing loop */ 897 898 /* Notify about deprecated features here. */ 899 900 /* Determine the path prefix for vgdb */ 901 if (VG_(clo_vgdb_prefix) == NULL) 902 VG_(clo_vgdb_prefix) = VG_(vgdb_prefix_default)(); 903 904 /* Make VEX control parameters sane */ 905 906 if (VG_(clo_vex_control).guest_chase_thresh 907 >= VG_(clo_vex_control).guest_max_insns) 908 VG_(clo_vex_control).guest_chase_thresh 909 = VG_(clo_vex_control).guest_max_insns - 1; 910 911 if (VG_(clo_vex_control).guest_chase_thresh < 0) 912 VG_(clo_vex_control).guest_chase_thresh = 0; 913 914 /* Check various option values */ 915 916 if (VG_(clo_verbosity) < 0) 917 VG_(clo_verbosity) = 0; 918 919 if (!sigill_diag_set) 920 VG_(clo_sigill_diag) = (VG_(clo_verbosity) > 0); 921 922 if (VG_(clo_trace_notbelow) == -1) { 923 if (VG_(clo_trace_notabove) == -1) { 924 /* [] */ 925 VG_(clo_trace_notbelow) = 2147483647; 926 VG_(clo_trace_notabove) = 0; 927 } else { 928 /* [0 .. notabove] */ 929 VG_(clo_trace_notbelow) = 0; 930 } 931 } else { 932 if (VG_(clo_trace_notabove) == -1) { 933 /* [notbelow .. ] */ 934 VG_(clo_trace_notabove) = 2147483647; 935 } else { 936 /* [notbelow .. notabove] */ 937 } 938 } 939 940 VG_(dyn_vgdb_error) = VG_(clo_vgdb_error); 941 942 if (VG_(clo_gen_suppressions) > 0 && 943 !VG_(needs).core_errors && !VG_(needs).tool_errors) { 944 VG_(fmsg_bad_option)("--gen-suppressions=yes", 945 "Can't use --gen-suppressions= with %s\n" 946 "because it doesn't generate errors.\n", VG_(details).name); 947 } 948 949 # if !defined(VGO_darwin) 950 if (VG_(clo_resync_filter) != 0) { 951 VG_(fmsg_bad_option)("--resync-filter=yes or =verbose", 952 "--resync-filter= is only available on MacOS X.\n"); 953 /*NOTREACHED*/ 954 } 955 # endif 956 957 /* If XML output is requested, check that the tool actually 958 supports it. */ 959 if (VG_(clo_xml) && !VG_(needs).xml_output) { 960 VG_(clo_xml) = False; 961 VG_(fmsg_bad_option)("--xml=yes", 962 "%s does not support XML output.\n", VG_(details).name); 963 /*NOTREACHED*/ 964 } 965 966 vg_assert( VG_(clo_gen_suppressions) >= 0 ); 967 vg_assert( VG_(clo_gen_suppressions) <= 2 ); 968 969 /* If we've been asked to emit XML, mash around various other 970 options so as to constrain the output somewhat, and to remove 971 any need for user input during the run. 972 */ 973 if (VG_(clo_xml)) { 974 975 /* We can't allow --gen-suppressions=yes, since that requires us 976 to print the error and then ask the user if she wants a 977 suppression for it, but in XML mode we won't print it until 978 we know whether we also need to print a suppression. Hence a 979 circular dependency. So disallow this. 980 (--gen-suppressions=all is still OK since we don't need any 981 user interaction in this case.) */ 982 if (VG_(clo_gen_suppressions) == 1) { 983 VG_(fmsg_bad_option)( 984 "--xml=yes together with --gen-suppressions=yes", 985 "When --xml=yes is specified, --gen-suppressions=no\n" 986 "or --gen-suppressions=all is allowed, but not " 987 "--gen-suppressions=yes.\n"); 988 } 989 990 /* Disallow dump_error in XML mode; sounds like a recipe for 991 chaos. No big deal; dump_error is a flag for debugging V 992 itself. */ 993 if (VG_(clo_dump_error) > 0) { 994 VG_(fmsg_bad_option)("--xml=yes", 995 "Cannot be used together with --dump-error"); 996 } 997 998 /* Disable error limits (this might be a bad idea!) */ 999 VG_(clo_error_limit) = False; 1000 /* Disable emulation warnings */ 1001 1002 /* Also, we want to set options for the leak checker, but that 1003 will have to be done in Memcheck's flag-handling code, not 1004 here. */ 1005 } 1006 1007 /* All non-logging-related options have been checked. If the logging 1008 option specified is ok, we can switch to it, as we know we won't 1009 have to generate any other command-line-related error messages. 1010 (So far we should be still attached to stderr, so we can show on 1011 the terminal any problems to do with processing command line 1012 opts.) 1013 1014 So set up logging now. After this is done, VG_(log_output_sink) 1015 and (if relevant) VG_(xml_output_sink) should be connected to 1016 whatever sink has been selected, and we indiscriminately chuck 1017 stuff into it without worrying what the nature of it is. Oh the 1018 wonder of Unix streams. */ 1019 1020 vg_assert(VG_(log_output_sink).fd == 2 /* stderr */); 1021 vg_assert(VG_(log_output_sink).is_socket == False); 1022 vg_assert(VG_(clo_log_fname_expanded) == NULL); 1023 1024 vg_assert(VG_(xml_output_sink).fd == -1 /* disabled */); 1025 vg_assert(VG_(xml_output_sink).is_socket == False); 1026 vg_assert(VG_(clo_xml_fname_expanded) == NULL); 1027 1028 /* --- set up the normal text output channel --- */ 1029 1030 switch (log_to) { 1031 1032 case VgLogTo_Fd: 1033 vg_assert(log_fsname_unexpanded == NULL); 1034 break; 1035 1036 case VgLogTo_File: { 1037 HChar* logfilename; 1038 1039 vg_assert(log_fsname_unexpanded != NULL); 1040 vg_assert(VG_(strlen)(log_fsname_unexpanded) <= 900); /* paranoia */ 1041 1042 // Nb: we overwrite an existing file of this name without asking 1043 // any questions. 1044 logfilename = VG_(expand_file_name)("--log-file", 1045 log_fsname_unexpanded); 1046 sres = VG_(open)(logfilename, 1047 VKI_O_CREAT|VKI_O_WRONLY|VKI_O_TRUNC, 1048 VKI_S_IRUSR|VKI_S_IWUSR|VKI_S_IRGRP|VKI_S_IROTH); 1049 if (!sr_isError(sres)) { 1050 tmp_log_fd = sr_Res(sres); 1051 VG_(clo_log_fname_expanded) = logfilename; 1052 } else { 1053 VG_(fmsg)("can't create log file '%s': %s\n", 1054 logfilename, VG_(strerror)(sr_Err(sres))); 1055 VG_(exit)(1); 1056 /*NOTREACHED*/ 1057 } 1058 break; 1059 } 1060 1061 case VgLogTo_Socket: { 1062 vg_assert(log_fsname_unexpanded != NULL); 1063 vg_assert(VG_(strlen)(log_fsname_unexpanded) <= 900); /* paranoia */ 1064 tmp_log_fd = VG_(connect_via_socket)( log_fsname_unexpanded ); 1065 if (tmp_log_fd == -1) { 1066 VG_(fmsg)("Invalid --log-socket spec of '%s'\n", 1067 log_fsname_unexpanded); 1068 VG_(exit)(1); 1069 /*NOTREACHED*/ 1070 } 1071 if (tmp_log_fd == -2) { 1072 VG_(umsg)("failed to connect to logging server '%s'.\n" 1073 "Log messages will sent to stderr instead.\n", 1074 log_fsname_unexpanded ); 1075 1076 /* We don't change anything here. */ 1077 vg_assert(VG_(log_output_sink).fd == 2); 1078 tmp_log_fd = 2; 1079 } else { 1080 vg_assert(tmp_log_fd > 0); 1081 VG_(log_output_sink).is_socket = True; 1082 } 1083 break; 1084 } 1085 } 1086 1087 /* --- set up the XML output channel --- */ 1088 1089 switch (xml_to) { 1090 1091 case VgLogTo_Fd: 1092 vg_assert(xml_fsname_unexpanded == NULL); 1093 break; 1094 1095 case VgLogTo_File: { 1096 HChar* xmlfilename; 1097 1098 vg_assert(xml_fsname_unexpanded != NULL); 1099 vg_assert(VG_(strlen)(xml_fsname_unexpanded) <= 900); /* paranoia */ 1100 1101 // Nb: we overwrite an existing file of this name without asking 1102 // any questions. 1103 xmlfilename = VG_(expand_file_name)("--xml-file", 1104 xml_fsname_unexpanded); 1105 sres = VG_(open)(xmlfilename, 1106 VKI_O_CREAT|VKI_O_WRONLY|VKI_O_TRUNC, 1107 VKI_S_IRUSR|VKI_S_IWUSR|VKI_S_IRGRP|VKI_S_IROTH); 1108 if (!sr_isError(sres)) { 1109 tmp_xml_fd = sr_Res(sres); 1110 VG_(clo_xml_fname_expanded) = xmlfilename; 1111 *xml_fname_unexpanded = xml_fsname_unexpanded; 1112 } else { 1113 VG_(fmsg)("can't create XML file '%s': %s\n", 1114 xmlfilename, VG_(strerror)(sr_Err(sres))); 1115 VG_(exit)(1); 1116 /*NOTREACHED*/ 1117 } 1118 break; 1119 } 1120 1121 case VgLogTo_Socket: { 1122 vg_assert(xml_fsname_unexpanded != NULL); 1123 vg_assert(VG_(strlen)(xml_fsname_unexpanded) <= 900); /* paranoia */ 1124 tmp_xml_fd = VG_(connect_via_socket)( xml_fsname_unexpanded ); 1125 if (tmp_xml_fd == -1) { 1126 VG_(fmsg)("Invalid --xml-socket spec of '%s'\n", 1127 xml_fsname_unexpanded ); 1128 VG_(exit)(1); 1129 /*NOTREACHED*/ 1130 } 1131 if (tmp_xml_fd == -2) { 1132 VG_(umsg)("failed to connect to XML logging server '%s'.\n" 1133 "XML output will sent to stderr instead.\n", 1134 xml_fsname_unexpanded); 1135 /* We don't change anything here. */ 1136 vg_assert(VG_(xml_output_sink).fd == 2); 1137 tmp_xml_fd = 2; 1138 } else { 1139 vg_assert(tmp_xml_fd > 0); 1140 VG_(xml_output_sink).is_socket = True; 1141 } 1142 break; 1143 } 1144 } 1145 1146 /* If we've got this far, and XML mode was requested, but no XML 1147 output channel appears to have been specified, just stop. We 1148 could continue, and XML output will simply vanish into nowhere, 1149 but that is likely to confuse the hell out of users, which is 1150 distinctly Ungood. */ 1151 if (VG_(clo_xml) && tmp_xml_fd == -1) { 1152 VG_(fmsg_bad_option)( 1153 "--xml=yes, but no XML destination specified", 1154 "--xml=yes has been specified, but there is no XML output\n" 1155 "destination. You must specify an XML output destination\n" 1156 "using --xml-fd, --xml-file or --xml-socket.\n" 1157 ); 1158 } 1159 1160 // Finalise the output fds: the log fd .. 1161 1162 if (tmp_log_fd >= 0) { 1163 // Move log_fd into the safe range, so it doesn't conflict with 1164 // any app fds. 1165 tmp_log_fd = VG_(fcntl)(tmp_log_fd, VKI_F_DUPFD, VG_(fd_hard_limit)); 1166 if (tmp_log_fd < 0) { 1167 VG_(message)(Vg_UserMsg, "valgrind: failed to move logfile fd " 1168 "into safe range, using stderr\n"); 1169 VG_(log_output_sink).fd = 2; // stderr 1170 VG_(log_output_sink).is_socket = False; 1171 } else { 1172 VG_(log_output_sink).fd = tmp_log_fd; 1173 VG_(fcntl)(VG_(log_output_sink).fd, VKI_F_SETFD, VKI_FD_CLOEXEC); 1174 } 1175 } else { 1176 // If they said --log-fd=-1, don't print anything. Plausible for use in 1177 // regression testing suites that use client requests to count errors. 1178 VG_(log_output_sink).fd = -1; 1179 VG_(log_output_sink).is_socket = False; 1180 } 1181 1182 // Finalise the output fds: and the XML fd .. 1183 1184 if (tmp_xml_fd >= 0) { 1185 // Move xml_fd into the safe range, so it doesn't conflict with 1186 // any app fds. 1187 tmp_xml_fd = VG_(fcntl)(tmp_xml_fd, VKI_F_DUPFD, VG_(fd_hard_limit)); 1188 if (tmp_xml_fd < 0) { 1189 VG_(message)(Vg_UserMsg, "valgrind: failed to move XML file fd " 1190 "into safe range, using stderr\n"); 1191 VG_(xml_output_sink).fd = 2; // stderr 1192 VG_(xml_output_sink).is_socket = False; 1193 } else { 1194 VG_(xml_output_sink).fd = tmp_xml_fd; 1195 VG_(fcntl)(VG_(xml_output_sink).fd, VKI_F_SETFD, VKI_FD_CLOEXEC); 1196 } 1197 } else { 1198 // If they said --xml-fd=-1, don't print anything. Plausible for use in 1199 // regression testing suites that use client requests to count errors. 1200 VG_(xml_output_sink).fd = -1; 1201 VG_(xml_output_sink).is_socket = False; 1202 } 1203 1204 // Suppressions related stuff 1205 1206 if (VG_(clo_default_supp) && 1207 (VG_(needs).core_errors || VG_(needs).tool_errors)) { 1208 /* If we haven't reached the max number of suppressions, load 1209 the default one. */ 1210 static const HChar default_supp[] = "default.supp"; 1211 Int len = VG_(strlen)(VG_(libdir)) + 1 + sizeof(default_supp); 1212 HChar *buf = VG_(malloc)("main.mpclo.3", len); 1213 VG_(sprintf)(buf, "%s/%s", VG_(libdir), default_supp); 1214 VG_(addToXA)(VG_(clo_suppressions), &buf); 1215 } 1216 1217 *logging_to_fd = log_to == VgLogTo_Fd || log_to == VgLogTo_Socket; 1218 } 1219 1220 // Write the name and value of log file qualifiers to the xml file. 1221 // We can safely assume here that the format string is well-formed. 1222 // It has been checked earlier in VG_(expand_file_name) when processing 1223 // command line options. 1224 static void print_file_vars(const HChar* format) 1225 { 1226 Int i = 0; 1227 1228 while (format[i]) { 1229 if (format[i] == '%') { 1230 // We saw a '%'. What's next... 1231 i++; 1232 if ('q' == format[i]) { 1233 i++; 1234 if ('{' == format[i]) { 1235 // Get the env var name, print its contents. 1236 HChar* qual; 1237 Int begin_qualname = ++i; 1238 while (True) { 1239 if ('}' == format[i]) { 1240 Int qualname_len = i - begin_qualname; 1241 HChar qualname[qualname_len + 1]; 1242 VG_(strncpy)(qualname, format + begin_qualname, 1243 qualname_len); 1244 qualname[qualname_len] = '\0'; 1245 qual = VG_(getenv)(qualname); 1246 i++; 1247 VG_(printf_xml)("<logfilequalifier> <var>%pS</var> " 1248 "<value>%pS</value> </logfilequalifier>\n", 1249 qualname, qual); 1250 break; 1251 } 1252 i++; 1253 } 1254 } 1255 } 1256 } else { 1257 i++; 1258 } 1259 } 1260 } 1261 1262 1263 /*====================================================================*/ 1264 /*=== Printing the preamble ===*/ 1265 /*====================================================================*/ 1266 1267 // Print the argument, escaping any chars that require it. 1268 static void umsg_arg(const HChar* arg) 1269 { 1270 SizeT len = VG_(strlen)(arg); 1271 const HChar* special = " \\<>"; 1272 Int i; 1273 for (i = 0; i < len; i++) { 1274 if (VG_(strchr)(special, arg[i])) { 1275 VG_(umsg)("\\"); // escape with a backslash if necessary 1276 } 1277 VG_(umsg)("%c", arg[i]); 1278 } 1279 } 1280 1281 // Send output to the XML-stream and escape any XML meta-characters. 1282 static void xml_arg(const HChar* arg) 1283 { 1284 VG_(printf_xml)("%pS", arg); 1285 } 1286 1287 /* Ok, the logging sink is running now. Print a suitable preamble. 1288 If logging to file or a socket, write details of parent PID and 1289 command line args, to help people trying to interpret the 1290 results of a run which encompasses multiple processes. */ 1291 static void print_preamble ( Bool logging_to_fd, 1292 const HChar* xml_fname_unexpanded, 1293 const HChar* toolname ) 1294 { 1295 Int i; 1296 const HChar* xpre = VG_(clo_xml) ? " <line>" : ""; 1297 const HChar* xpost = VG_(clo_xml) ? "</line>" : ""; 1298 UInt (*umsg_or_xml)( const HChar*, ... ) 1299 = VG_(clo_xml) ? VG_(printf_xml) : VG_(umsg); 1300 1301 void (*umsg_or_xml_arg)( const HChar* ) 1302 = VG_(clo_xml) ? xml_arg : umsg_arg; 1303 1304 vg_assert( VG_(args_for_client) ); 1305 vg_assert( VG_(args_for_valgrind) ); 1306 vg_assert( toolname ); 1307 1308 if (VG_(clo_xml)) { 1309 VG_(printf_xml)("<?xml version=\"1.0\"?>\n"); 1310 VG_(printf_xml)("\n"); 1311 VG_(printf_xml)("<valgrindoutput>\n"); 1312 VG_(printf_xml)("\n"); 1313 VG_(printf_xml)("<protocolversion>4</protocolversion>\n"); 1314 VG_(printf_xml)("<protocoltool>%s</protocoltool>\n", toolname); 1315 VG_(printf_xml)("\n"); 1316 } 1317 1318 if (VG_(clo_xml) || VG_(clo_verbosity > 0)) { 1319 1320 if (VG_(clo_xml)) 1321 VG_(printf_xml)("<preamble>\n"); 1322 1323 /* Tool details */ 1324 umsg_or_xml( VG_(clo_xml) ? "%s%pS%pS%pS, %pS%s\n" : "%s%s%s%s, %s%s\n", 1325 xpre, 1326 VG_(details).name, 1327 NULL == VG_(details).version ? "" : "-", 1328 NULL == VG_(details).version 1329 ? "" : VG_(details).version, 1330 VG_(details).description, 1331 xpost ); 1332 1333 if (VG_(strlen)(toolname) >= 4 && VG_STREQN(4, toolname, "exp-")) { 1334 umsg_or_xml( 1335 "%sNOTE: This is an Experimental-Class Valgrind Tool%s\n", 1336 xpre, xpost 1337 ); 1338 } 1339 1340 umsg_or_xml( VG_(clo_xml) ? "%s%pS%s\n" : "%s%s%s\n", 1341 xpre, VG_(details).copyright_author, xpost ); 1342 1343 /* Core details */ 1344 umsg_or_xml( 1345 "%sUsing Valgrind-%s and LibVEX; rerun with -h for copyright info%s\n", 1346 xpre, VERSION, xpost 1347 ); 1348 1349 // Print the command line. At one point we wrapped at 80 chars and 1350 // printed a '\' as a line joiner, but that makes it hard to cut and 1351 // paste the command line (because of the "==pid==" prefixes), so we now 1352 // favour utility and simplicity over aesthetics. 1353 umsg_or_xml("%sCommand: ", xpre); 1354 umsg_or_xml_arg(VG_(args_the_exename)); 1355 1356 for (i = 0; i < VG_(sizeXA)( VG_(args_for_client) ); i++) { 1357 HChar* s = *(HChar**)VG_(indexXA)( VG_(args_for_client), i ); 1358 umsg_or_xml(" "); 1359 umsg_or_xml_arg(s); 1360 } 1361 umsg_or_xml("%s\n", xpost); 1362 1363 if (VG_(clo_xml)) 1364 VG_(printf_xml)("</preamble>\n"); 1365 } 1366 1367 // Print the parent PID, and other stuff, if necessary. 1368 if (!VG_(clo_xml) && VG_(clo_verbosity) > 0 && !logging_to_fd) { 1369 VG_(umsg)("Parent PID: %d\n", VG_(getppid)()); 1370 } 1371 else 1372 if (VG_(clo_xml)) { 1373 VG_(printf_xml)("\n"); 1374 VG_(printf_xml)("<pid>%d</pid>\n", VG_(getpid)()); 1375 VG_(printf_xml)("<ppid>%d</ppid>\n", VG_(getppid)()); 1376 VG_(printf_xml)("<tool>%pS</tool>\n", toolname); 1377 if (xml_fname_unexpanded) 1378 print_file_vars(xml_fname_unexpanded); 1379 if (VG_(clo_xml_user_comment)) { 1380 /* Note: the user comment itself is XML and is therefore to 1381 be passed through verbatim (%s) rather than escaped 1382 (%pS). */ 1383 VG_(printf_xml)("<usercomment>%s</usercomment>\n", 1384 VG_(clo_xml_user_comment)); 1385 } 1386 VG_(printf_xml)("\n"); 1387 VG_(printf_xml)("<args>\n"); 1388 1389 VG_(printf_xml)(" <vargv>\n"); 1390 if (VG_(name_of_launcher)) 1391 VG_(printf_xml)(" <exe>%pS</exe>\n", 1392 VG_(name_of_launcher)); 1393 else 1394 VG_(printf_xml)(" <exe>%pS</exe>\n", 1395 "(launcher name unknown)"); 1396 for (i = 0; i < VG_(sizeXA)( VG_(args_for_valgrind) ); i++) { 1397 VG_(printf_xml)( 1398 " <arg>%pS</arg>\n", 1399 * (HChar**) VG_(indexXA)( VG_(args_for_valgrind), i ) 1400 ); 1401 } 1402 VG_(printf_xml)(" </vargv>\n"); 1403 1404 VG_(printf_xml)(" <argv>\n"); 1405 VG_(printf_xml)(" <exe>%pS</exe>\n", 1406 VG_(args_the_exename)); 1407 for (i = 0; i < VG_(sizeXA)( VG_(args_for_client) ); i++) { 1408 VG_(printf_xml)( 1409 " <arg>%pS</arg>\n", 1410 * (HChar**) VG_(indexXA)( VG_(args_for_client), i ) 1411 ); 1412 } 1413 VG_(printf_xml)(" </argv>\n"); 1414 1415 VG_(printf_xml)("</args>\n"); 1416 } 1417 1418 // Last thing in the preamble is a blank line. 1419 if (VG_(clo_xml)) 1420 VG_(printf_xml)("\n"); 1421 else if (VG_(clo_verbosity) > 0) 1422 VG_(umsg)("\n"); 1423 1424 if (VG_(clo_verbosity) > 1) { 1425 # if defined(VGO_linux) 1426 SysRes fd; 1427 # endif 1428 VexArch vex_arch; 1429 VexArchInfo vex_archinfo; 1430 if (!logging_to_fd) 1431 VG_(message)(Vg_DebugMsg, "\n"); 1432 VG_(message)(Vg_DebugMsg, "Valgrind options:\n"); 1433 for (i = 0; i < VG_(sizeXA)( VG_(args_for_valgrind) ); i++) { 1434 VG_(message)(Vg_DebugMsg, 1435 " %s\n", 1436 * (HChar**) VG_(indexXA)( VG_(args_for_valgrind), i )); 1437 } 1438 1439 # if defined(VGO_linux) 1440 VG_(message)(Vg_DebugMsg, "Contents of /proc/version:\n"); 1441 fd = VG_(open) ( "/proc/version", VKI_O_RDONLY, 0 ); 1442 if (sr_isError(fd)) { 1443 VG_(message)(Vg_DebugMsg, " can't open /proc/version\n"); 1444 } else { 1445 const SizeT bufsiz = 255; 1446 HChar version_buf[bufsiz+1]; 1447 VG_(message)(Vg_DebugMsg, " "); 1448 Int n, fdno = sr_Res(fd); 1449 do { 1450 n = VG_(read)(fdno, version_buf, bufsiz); 1451 if (n < 0) { 1452 VG_(message)(Vg_DebugMsg, " error reading /proc/version\n"); 1453 break; 1454 } 1455 version_buf[n] = '\0'; 1456 VG_(message)(Vg_DebugMsg, "%s", version_buf); 1457 } while (n == bufsiz); 1458 VG_(message)(Vg_DebugMsg, "\n"); 1459 VG_(close)(fdno); 1460 } 1461 # elif defined(VGO_darwin) 1462 VG_(message)(Vg_DebugMsg, "Output from sysctl({CTL_KERN,KERN_VERSION}):\n"); 1463 /* Note: preferable to use sysctlbyname("kern.version", kernelVersion, &len, NULL, 0) 1464 however that syscall is OS X 10.10+ only. */ 1465 Int mib[] = {CTL_KERN, KERN_VERSION}; 1466 SizeT len; 1467 VG_(sysctl)(mib, sizeof(mib)/sizeof(Int), NULL, &len, NULL, 0); 1468 HChar *kernelVersion = VG_(malloc)("main.pp.1", len); 1469 VG_(sysctl)(mib, sizeof(mib)/sizeof(Int), kernelVersion, &len, NULL, 0); 1470 VG_(message)(Vg_DebugMsg, " %s\n", kernelVersion); 1471 VG_(free)( kernelVersion ); 1472 # elif defined(VGO_solaris) 1473 /* There is no /proc/version file on Solaris so we try to get some 1474 system information using the uname(2) syscall. */ 1475 { 1476 struct vki_utsname uts; 1477 1478 VG_(message)(Vg_DebugMsg, "System information:\n"); 1479 SysRes res = VG_(do_syscall1)(__NR_uname, (UWord)&uts); 1480 if (sr_isError(res)) 1481 VG_(message)(Vg_DebugMsg, " uname() failed\n"); 1482 else 1483 VG_(message)(Vg_DebugMsg, " %s %s %s %s\n", 1484 uts.sysname, uts.release, uts.version, uts.machine); 1485 } 1486 # endif 1487 1488 VG_(machine_get_VexArchInfo)( &vex_arch, &vex_archinfo ); 1489 VG_(message)( 1490 Vg_DebugMsg, 1491 "Arch and hwcaps: %s, %s, %s\n", 1492 LibVEX_ppVexArch ( vex_arch ), 1493 LibVEX_ppVexEndness ( vex_archinfo.endness ), 1494 LibVEX_ppVexHwCaps ( vex_arch, vex_archinfo.hwcaps ) 1495 ); 1496 VG_(message)( 1497 Vg_DebugMsg, 1498 "Page sizes: currently %d, max supported %d\n", 1499 (Int)VKI_PAGE_SIZE, (Int)VKI_MAX_PAGE_SIZE 1500 ); 1501 VG_(message)(Vg_DebugMsg, 1502 "Valgrind library directory: %s\n", VG_(libdir)); 1503 } 1504 } 1505 1506 1507 /*====================================================================*/ 1508 /*=== File descriptor setup ===*/ 1509 /*====================================================================*/ 1510 1511 /* Number of file descriptors that Valgrind tries to reserve for 1512 it's own use - just a small constant. */ 1513 #define N_RESERVED_FDS (10) 1514 1515 static void setup_file_descriptors(void) 1516 { 1517 struct vki_rlimit rl; 1518 Bool show = False; 1519 1520 /* Get the current file descriptor limits. */ 1521 if (VG_(getrlimit)(VKI_RLIMIT_NOFILE, &rl) < 0) { 1522 rl.rlim_cur = 1024; 1523 rl.rlim_max = 1024; 1524 } 1525 1526 # if defined(VGO_darwin) 1527 /* Darwin lies. It reports file max as RLIM_INFINITY but 1528 silently disallows anything bigger than 10240. */ 1529 if (rl.rlim_cur >= 10240 && rl.rlim_max == 0x7fffffffffffffffULL) { 1530 rl.rlim_max = 10240; 1531 } 1532 # endif 1533 1534 if (show) 1535 VG_(printf)("fd limits: host, before: cur %llu max %llu\n", 1536 (ULong)rl.rlim_cur, (ULong)rl.rlim_max); 1537 1538 /* Work out where to move the soft limit to. */ 1539 if (rl.rlim_cur + N_RESERVED_FDS <= rl.rlim_max) { 1540 rl.rlim_cur = rl.rlim_cur + N_RESERVED_FDS; 1541 } else { 1542 rl.rlim_cur = rl.rlim_max; 1543 } 1544 1545 /* Reserve some file descriptors for our use. */ 1546 VG_(fd_soft_limit) = rl.rlim_cur - N_RESERVED_FDS; 1547 VG_(fd_hard_limit) = rl.rlim_cur - N_RESERVED_FDS; 1548 1549 /* Update the soft limit. */ 1550 VG_(setrlimit)(VKI_RLIMIT_NOFILE, &rl); 1551 1552 if (show) { 1553 VG_(printf)("fd limits: host, after: cur %lu max %lu\n", 1554 (UWord)rl.rlim_cur, (UWord)rl.rlim_max); 1555 VG_(printf)("fd limits: guest : cur %d max %d\n", 1556 VG_(fd_soft_limit), VG_(fd_hard_limit)); 1557 } 1558 1559 if (VG_(cl_exec_fd) != -1) 1560 VG_(cl_exec_fd) = VG_(safe_fd)( VG_(cl_exec_fd) ); 1561 } 1562 1563 1564 /*====================================================================*/ 1565 /*=== main() ===*/ 1566 /*====================================================================*/ 1567 1568 /* When main() is entered, we should be on the following stack, not 1569 the one the kernel gave us. We will run on this stack until 1570 simulation of the root thread is started, at which point a transfer 1571 is made to a dynamically allocated stack. This is for the sake of 1572 uniform overflow detection for all Valgrind threads. This is 1573 marked global even though it isn't, because assembly code below 1574 needs to reference the name. */ 1575 1576 /*static*/ struct { 1577 HChar bytes [VG_STACK_GUARD_SZB + VG_DEFAULT_STACK_ACTIVE_SZB + VG_STACK_GUARD_SZB]; 1578 } VG_(interim_stack); 1579 1580 /* These are the structures used to hold info for creating the initial 1581 client image. 1582 1583 'iicii' mostly holds important register state present at system 1584 startup (_start_valgrind). valgrind_main() then fills in the rest 1585 of it and passes it to VG_(ii_create_image)(). That produces 1586 'iifii', which is later handed to VG_(ii_finalise_image). */ 1587 1588 /* In all OS-instantiations, the_iicii has a field .sp_at_startup. 1589 This should get some address inside the stack on which we gained 1590 control (eg, it could be the SP at startup). It doesn't matter 1591 exactly where in the stack it is. This value is passed to the 1592 address space manager at startup. On Linux, aspacem then uses it 1593 to identify the initial stack segment and hence the upper end of 1594 the usable address space. */ 1595 1596 static IICreateImageInfo the_iicii; 1597 static IIFinaliseImageInfo the_iifii; 1598 1599 1600 /* A simple pair structure, used for conveying debuginfo handles to 1601 calls to VG_TRACK(new_mem_startup, ...). */ 1602 typedef struct { Addr a; ULong ull; } Addr_n_ULong; 1603 1604 1605 /* --- Forwards decls to do with shutdown --- */ 1606 1607 static void final_tidyup(ThreadId tid); 1608 1609 /* Do everything which needs doing when the last thread exits */ 1610 static 1611 void shutdown_actions_NORETURN( ThreadId tid, 1612 VgSchedReturnCode tids_schedretcode ); 1613 1614 /* --- end of Forwards decls to do with shutdown --- */ 1615 1616 1617 /* By the time we get to valgrind_main, the_iicii should already have 1618 been filled in with any important details as required by whatever 1619 OS we have been built for. 1620 */ 1621 static 1622 Int valgrind_main ( Int argc, HChar **argv, HChar **envp ) 1623 { 1624 const HChar* toolname = "memcheck"; // default to Memcheck 1625 Int need_help = 0; // 0 = no, 1 = --help, 2 = --help-debug 1626 ThreadId tid_main = VG_INVALID_THREADID; 1627 Bool logging_to_fd = False; 1628 const HChar* xml_fname_unexpanded = NULL; 1629 Int loglevel, i; 1630 struct vki_rlimit zero = { 0, 0 }; 1631 XArray* addr2dihandle = NULL; 1632 1633 //============================================================ 1634 // 1635 // Nb: startup is complex. Prerequisites are shown at every step. 1636 // *** Be very careful when messing with the order *** 1637 // 1638 // The first order of business is to get debug logging, the address 1639 // space manager and the dynamic memory manager up and running. 1640 // Once that's done, we can relax a bit. 1641 // 1642 //============================================================ 1643 1644 /* This is needed to make VG_(getenv) usable early. */ 1645 VG_(client_envp) = (HChar**)envp; 1646 1647 //-------------------------------------------------------------- 1648 // Start up Mach kernel interface, if any 1649 // p: none 1650 //-------------------------------------------------------------- 1651 # if defined(VGO_darwin) 1652 VG_(mach_init)(); 1653 # endif 1654 1655 //-------------------------------------------------------------- 1656 // Start up the logging mechanism 1657 // p: none 1658 //-------------------------------------------------------------- 1659 /* Start the debugging-log system ASAP. First find out how many 1660 "-d"s were specified. This is a pre-scan of the command line. Also 1661 get --profile-heap=yes, --core-redzone-size, --redzone-size 1662 --aspace-minaddr which are needed by the time we start up dynamic 1663 memory management. */ 1664 loglevel = 0; 1665 for (i = 1; i < argc; i++) { 1666 const HChar* tmp_str; 1667 if (argv[i][0] != '-') break; 1668 if VG_STREQ(argv[i], "--") break; 1669 if VG_STREQ(argv[i], "-d") loglevel++; 1670 if VG_BOOL_CLO(argv[i], "--profile-heap", VG_(clo_profile_heap)) {} 1671 if VG_BINT_CLO(argv[i], "--core-redzone-size", VG_(clo_core_redzone_size), 1672 0, MAX_CLO_REDZONE_SZB) {} 1673 if VG_BINT_CLO(argv[i], "--redzone-size", VG_(clo_redzone_size), 1674 0, MAX_CLO_REDZONE_SZB) {} 1675 if VG_STR_CLO(argv[i], "--aspace-minaddr", tmp_str) { 1676 Bool ok = VG_(parse_Addr) (&tmp_str, &VG_(clo_aspacem_minAddr)); 1677 if (!ok) 1678 VG_(fmsg_bad_option)(argv[i], "Invalid address\n"); 1679 const HChar *errmsg; 1680 if (!VG_(am_is_valid_for_aspacem_minAddr)(VG_(clo_aspacem_minAddr), 1681 &errmsg)) 1682 VG_(fmsg_bad_option)(argv[i], "%s\n", errmsg); 1683 } 1684 } 1685 1686 /* ... and start the debug logger. Now we can safely emit logging 1687 messages all through startup. */ 1688 VG_(debugLog_startup)(loglevel, "Stage 2 (main)"); 1689 VG_(debugLog)(1, "main", "Welcome to Valgrind version " 1690 VERSION " debug logging\n"); 1691 1692 //-------------------------------------------------------------- 1693 // Ensure we're on a plausible stack. 1694 // p: logging 1695 //-------------------------------------------------------------- 1696 VG_(debugLog)(1, "main", "Checking current stack is plausible\n"); 1697 { HChar* limLo = (HChar*)(&VG_(interim_stack).bytes[0]); 1698 HChar* limHi = limLo + sizeof(VG_(interim_stack)); 1699 HChar* volatile 1700 aLocal = (HChar*)&limLo; /* any auto local will do */ 1701 /* Re "volatile": Apple clang version 4.0 1702 (tags/Apple/clang-421.0.57) (based on LLVM 3.1svn)" appeared 1703 to miscompile the following check, causing run to abort at 1704 this point (in 64-bit mode) even though aLocal is within limLo 1705 .. limHi. But in fact clang is within its rights to do 1706 strange things here. "The reason is that the comparisons 1707 aLocal < limLo and aLocal >= limHi cause undefined behaviour 1708 (according to c99 6.5.8) because they compare pointers that do 1709 not point into the same aggregate." Adding "volatile" appears 1710 to fix it because "The compiler would have to prove that there 1711 is undefined behavior in order to exploit it. But as a 1712 volatile variable can change its value in ways invisible to 1713 the compiler, the compiler must make the conservative 1714 assumption that it points into the same aggregate as the other 1715 pointer its compared against. I.e. the behaviour is possibly 1716 defined." (Analysis by Florian Krohm). */ 1717 if (aLocal < limLo || aLocal >= limHi) { 1718 /* something's wrong. Stop. */ 1719 VG_(debugLog)(0, "main", "Root stack %p to %p, a local %p\n", 1720 limLo, limHi, aLocal ); 1721 VG_(debugLog)(0, "main", "Valgrind: FATAL: " 1722 "Initial stack switched failed.\n"); 1723 VG_(debugLog)(0, "main", " Cannot continue. Sorry.\n"); 1724 VG_(exit)(1); 1725 } 1726 } 1727 1728 //-------------------------------------------------------------- 1729 // Ensure we have a plausible pointer to the stack on which 1730 // we gained control (not the current stack!) 1731 // p: logging 1732 //-------------------------------------------------------------- 1733 VG_(debugLog)(1, "main", "Checking initial stack was noted\n"); 1734 if (the_iicii.sp_at_startup == 0) { 1735 VG_(debugLog)(0, "main", "Valgrind: FATAL: " 1736 "Initial stack was not noted.\n"); 1737 VG_(debugLog)(0, "main", " Cannot continue. Sorry.\n"); 1738 VG_(exit)(1); 1739 } 1740 1741 //-------------------------------------------------------------- 1742 // Start up the address space manager, and determine the 1743 // approximate location of the client's stack 1744 // p: logging, plausible-stack 1745 //-------------------------------------------------------------- 1746 VG_(debugLog)(1, "main", "Starting the address space manager\n"); 1747 vg_assert(VKI_PAGE_SIZE == 4096 || VKI_PAGE_SIZE == 65536 1748 || VKI_PAGE_SIZE == 16384); 1749 vg_assert(VKI_MAX_PAGE_SIZE == 4096 || VKI_MAX_PAGE_SIZE == 65536 1750 || VKI_MAX_PAGE_SIZE == 16384); 1751 vg_assert(VKI_PAGE_SIZE <= VKI_MAX_PAGE_SIZE); 1752 vg_assert(VKI_PAGE_SIZE == (1 << VKI_PAGE_SHIFT)); 1753 vg_assert(VKI_MAX_PAGE_SIZE == (1 << VKI_MAX_PAGE_SHIFT)); 1754 the_iicii.clstack_end = VG_(am_startup)( the_iicii.sp_at_startup ); 1755 VG_(debugLog)(1, "main", "Address space manager is running\n"); 1756 1757 //-------------------------------------------------------------- 1758 // Start up the dynamic memory manager 1759 // p: address space management 1760 // p: getting --profile-heap,--core-redzone-size,--redzone-size 1761 // In fact m_mallocfree is self-initialising, so there's no 1762 // initialisation call to do. Instead, try a simple malloc/ 1763 // free pair right now to check that nothing is broken. 1764 //-------------------------------------------------------------- 1765 VG_(debugLog)(1, "main", "Starting the dynamic memory manager\n"); 1766 { void* p = VG_(malloc)( "main.vm.1", 12345 ); 1767 VG_(free)( p ); 1768 } 1769 VG_(debugLog)(1, "main", "Dynamic memory manager is running\n"); 1770 1771 //============================================================ 1772 // 1773 // Dynamic memory management is now available. 1774 // 1775 //============================================================ 1776 1777 //-------------------------------------------------------------- 1778 // Initialise m_debuginfo 1779 // p: dynamic memory allocation 1780 VG_(debugLog)(1, "main", "Initialise m_debuginfo\n"); 1781 VG_(di_initialise)(); 1782 1783 //-------------------------------------------------------------- 1784 // Look for alternative libdir 1785 { HChar *cp = VG_(getenv)(VALGRIND_LIB); 1786 if (cp != NULL) 1787 VG_(libdir) = cp; 1788 VG_(debugLog)(1, "main", "VG_(libdir) = %s\n", VG_(libdir)); 1789 } 1790 1791 //-------------------------------------------------------------- 1792 // Extract the launcher name from the environment. 1793 VG_(debugLog)(1, "main", "Getting launcher's name ...\n"); 1794 VG_(name_of_launcher) = VG_(getenv)(VALGRIND_LAUNCHER); 1795 if (VG_(name_of_launcher) == NULL) { 1796 VG_(printf)("valgrind: You cannot run '%s' directly.\n", argv[0]); 1797 VG_(printf)("valgrind: You should use $prefix/bin/valgrind.\n"); 1798 VG_(exit)(1); 1799 } 1800 VG_(debugLog)(1, "main", "... %s\n", VG_(name_of_launcher)); 1801 1802 //-------------------------------------------------------------- 1803 // Get the current process datasize rlimit, and set it to zero. 1804 // This prevents any internal uses of brk() from having any effect. 1805 // We remember the old value so we can restore it on exec, so that 1806 // child processes will have a reasonable brk value. 1807 VG_(getrlimit)(VKI_RLIMIT_DATA, &VG_(client_rlimit_data)); 1808 zero.rlim_max = VG_(client_rlimit_data).rlim_max; 1809 VG_(setrlimit)(VKI_RLIMIT_DATA, &zero); 1810 1811 // Get the current process stack rlimit. 1812 VG_(getrlimit)(VKI_RLIMIT_STACK, &VG_(client_rlimit_stack)); 1813 1814 //-------------------------------------------------------------- 1815 // Figure out what sort of CPU we're on, and whether it is 1816 // able to run V. 1817 /* The vex_archinfo structure is passed down later to the client 1818 * to verify the HW info settings are consistent. 1819 */ 1820 VexArchInfo vex_archinfo; 1821 VG_(debugLog)(1, "main", "Get hardware capabilities ...\n"); 1822 { VexArch vex_arch; 1823 Bool ok = VG_(machine_get_hwcaps)(); 1824 if (!ok) { 1825 VG_(printf)("\n"); 1826 VG_(printf)("valgrind: fatal error: unsupported CPU.\n"); 1827 VG_(printf)(" Supported CPUs are:\n"); 1828 VG_(printf)(" * x86 (practically any; Pentium-I or above), " 1829 "AMD Athlon or above)\n"); 1830 VG_(printf)(" * AMD Athlon64/Opteron\n"); 1831 VG_(printf)(" * ARM (armv7)\n"); 1832 VG_(printf)(" * PowerPC (most; ppc405 and above)\n"); 1833 VG_(printf)(" * System z (64bit only - s390x; z990 and above)\n"); 1834 VG_(printf)("\n"); 1835 VG_(exit)(1); 1836 } 1837 VG_(machine_get_VexArchInfo)( &vex_arch, &vex_archinfo ); 1838 VG_(debugLog)( 1839 1, "main", "... arch = %s, hwcaps = %s\n", 1840 LibVEX_ppVexArch ( vex_arch ), 1841 LibVEX_ppVexHwCaps ( vex_arch, vex_archinfo.hwcaps ) 1842 ); 1843 } 1844 1845 //-------------------------------------------------------------- 1846 // Record the working directory at startup 1847 // p: none 1848 VG_(debugLog)(1, "main", "Getting the working directory at startup\n"); 1849 { Bool ok = VG_(record_startup_wd)(); 1850 if (!ok) 1851 VG_(err_config_error)( "Can't establish current working " 1852 "directory at startup\n"); 1853 } 1854 VG_(debugLog)(1, "main", "... %s\n", VG_(get_startup_wd)() ); 1855 1856 //============================================================ 1857 // Command line argument handling order: 1858 // * If --help/--help-debug are present, show usage message 1859 // (including the tool-specific usage) 1860 // * (If no --tool option given, default to Memcheck) 1861 // * Then, if client is missing, abort with error msg 1862 // * Then, if any cmdline args are bad, abort with error msg 1863 //============================================================ 1864 1865 //-------------------------------------------------------------- 1866 // Split up argv into: C args, V args, V extra args, and exename. 1867 // p: dynamic memory allocation 1868 //-------------------------------------------------------------- 1869 VG_(debugLog)(1, "main", "Split up command line\n"); 1870 VG_(split_up_argv)( argc, argv ); 1871 vg_assert( VG_(args_for_valgrind) ); 1872 vg_assert( VG_(args_for_client) ); 1873 if (0) { 1874 for (i = 0; i < VG_(sizeXA)( VG_(args_for_valgrind) ); i++) 1875 VG_(printf)( 1876 "varg %s\n", 1877 * (HChar**) VG_(indexXA)( VG_(args_for_valgrind), i ) 1878 ); 1879 VG_(printf)(" exe %s\n", VG_(args_the_exename)); 1880 for (i = 0; i < VG_(sizeXA)( VG_(args_for_client) ); i++) 1881 VG_(printf)( 1882 "carg %s\n", 1883 * (HChar**) VG_(indexXA)( VG_(args_for_client), i ) 1884 ); 1885 } 1886 1887 //-------------------------------------------------------------- 1888 // Extract tool name and whether help has been requested. 1889 // Note we can't print the help message yet, even if requested, 1890 // because the tool has not been initialised. 1891 // p: split_up_argv [for VG_(args_for_valgrind)] 1892 //-------------------------------------------------------------- 1893 VG_(debugLog)(1, "main", 1894 "(early_) Process Valgrind's command line options\n"); 1895 early_process_cmd_line_options(&need_help, &toolname); 1896 1897 // BEGIN HACK 1898 vg_assert(toolname != NULL); 1899 vg_assert(VG_(clo_read_inline_info) == False); 1900 # if !defined(VGO_darwin) 1901 if (0 == VG_(strcmp)(toolname, "memcheck") 1902 || 0 == VG_(strcmp)(toolname, "helgrind") 1903 || 0 == VG_(strcmp)(toolname, "drd")) { 1904 /* Change the default setting. Later on (just below) 1905 main_process_cmd_line_options should pick up any 1906 user-supplied setting for it and will override the default 1907 set here. */ 1908 VG_(clo_read_inline_info) = True; 1909 } 1910 # endif 1911 // END HACK 1912 1913 // Set default vex control params. 1914 LibVEX_default_VexControl(& VG_(clo_vex_control)); 1915 1916 //-------------------------------------------------------------- 1917 // Load client executable, finding in $PATH if necessary 1918 // p: early_process_cmd_line_options() [for 'exec', 'need_help', 1919 // clo_max_stackframe, 1920 // clo_main_stacksize] 1921 // p: layout_remaining_space [so there's space] 1922 // 1923 // Set up client's environment 1924 // p: set-libdir [for VG_(libdir)] 1925 // p: early_process_cmd_line_options [for toolname] 1926 // 1927 // Setup client stack, eip, and VG_(client_arg[cv]) 1928 // p: load_client() [for 'info'] 1929 // p: fix_environment() [for 'env'] 1930 // 1931 // Setup client data (brk) segment. Initially a 1-page segment 1932 // which abuts a shrinkable reservation. 1933 // p: load_client() [for 'info' and hence VG_(brk_base)] 1934 // 1935 // p: _start_in_C (for zeroing out the_iicii and putting some 1936 // initial values into it) 1937 //-------------------------------------------------------------- 1938 if (!need_help) { 1939 VG_(debugLog)(1, "main", "Create initial image\n"); 1940 1941 # if defined(VGO_linux) || defined(VGO_darwin) || defined(VGO_solaris) 1942 the_iicii.argv = argv; 1943 the_iicii.envp = envp; 1944 the_iicii.toolname = toolname; 1945 # else 1946 # error "Unknown platform" 1947 # endif 1948 1949 /* NOTE: this call reads VG_(clo_main_stacksize). */ 1950 the_iifii = VG_(ii_create_image)( the_iicii, &vex_archinfo ); 1951 } 1952 1953 //============================================================== 1954 // 1955 // Finished loading/setting up the client address space. 1956 // 1957 //============================================================== 1958 1959 //-------------------------------------------------------------- 1960 // setup file descriptors 1961 // p: n/a 1962 //-------------------------------------------------------------- 1963 VG_(debugLog)(1, "main", "Setup file descriptors\n"); 1964 setup_file_descriptors(); 1965 1966 //-------------------------------------------------------------- 1967 // create fake /proc/<pid>/cmdline and /proc/<pid>/auxv files 1968 // and then unlink them, but hold onto the fds, so we can handr 1969 // them out to the client when it tries to open 1970 // /proc/<pid>/cmdline or /proc/<pid>/auxv for itself. 1971 // p: setup file descriptors 1972 // p: ii_create_image for VG_(client_auxv) setup. 1973 //-------------------------------------------------------------- 1974 VG_(cl_cmdline_fd) = -1; 1975 VG_(cl_auxv_fd) = -1; 1976 #if defined(VGO_solaris) 1977 VG_(cl_psinfo_fd) = -1; 1978 #endif 1979 1980 #if defined(VGO_linux) || defined(VGO_solaris) 1981 if (!need_help) { 1982 HChar buf[50]; // large enough 1983 HChar buf2[VG_(mkstemp_fullname_bufsz)(sizeof buf - 1)]; 1984 Int fd, r; 1985 1986 #if defined(VGO_linux) || defined(SOLARIS_PROC_CMDLINE) 1987 /* Fake /proc/<pid>/cmdline only on Linux and Solaris if supported. */ 1988 HChar nul[1]; 1989 const HChar* exename; 1990 1991 VG_(debugLog)(1, "main", "Create fake /proc/<pid>/cmdline\n"); 1992 1993 VG_(sprintf)(buf, "proc_%d_cmdline", VG_(getpid)()); 1994 fd = VG_(mkstemp)( buf, buf2 ); 1995 if (fd == -1) 1996 VG_(err_config_error)("Can't create client cmdline file in %s\n", buf2); 1997 1998 nul[0] = 0; 1999 exename = VG_(args_the_exename); 2000 VG_(write)(fd, exename, VG_(strlen)( exename )); 2001 VG_(write)(fd, nul, 1); 2002 2003 for (i = 0; i < VG_(sizeXA)( VG_(args_for_client) ); i++) { 2004 HChar* arg = * (HChar**) VG_(indexXA)( VG_(args_for_client), i ); 2005 VG_(write)(fd, arg, VG_(strlen)( arg )); 2006 VG_(write)(fd, nul, 1); 2007 } 2008 2009 /* Don't bother to seek the file back to the start; instead do 2010 it every time a copy of it is given out (by PRE(sys_open) or 2011 PRE(sys_openat)). That is probably more robust across fork() etc. */ 2012 2013 /* Now delete it, but hang on to the fd. */ 2014 r = VG_(unlink)( buf2 ); 2015 if (r) 2016 VG_(err_config_error)("Can't delete client cmdline file in %s\n", buf2); 2017 2018 VG_(cl_cmdline_fd) = fd; 2019 #endif // defined(VGO_linux) || defined(SOLARIS_PROC_CMDLINE) 2020 2021 /* Fake /proc/<pid>/auxv on both Linux and Solaris. */ 2022 VG_(debugLog)(1, "main", "Create fake /proc/<pid>/auxv\n"); 2023 2024 VG_(sprintf)(buf, "proc_%d_auxv", VG_(getpid)()); 2025 fd = VG_(mkstemp)( buf, buf2 ); 2026 if (fd == -1) 2027 VG_(err_config_error)("Can't create client auxv file in %s\n", buf2); 2028 2029 UWord *client_auxv = VG_(client_auxv); 2030 unsigned int client_auxv_len = 0; 2031 while (*client_auxv != 0) { 2032 client_auxv++; 2033 client_auxv++; 2034 client_auxv_len += 2 * sizeof(UWord); 2035 } 2036 client_auxv_len += 2 * sizeof(UWord); 2037 2038 VG_(write)(fd, VG_(client_auxv), client_auxv_len); 2039 2040 /* Don't bother to seek the file back to the start; instead do 2041 it every time a copy of it is given out (by PRE(sys_open)). 2042 That is probably more robust across fork() etc. */ 2043 2044 /* Now delete it, but hang on to the fd. */ 2045 r = VG_(unlink)( buf2 ); 2046 if (r) 2047 VG_(err_config_error)("Can't delete client auxv file in %s\n", buf2); 2048 2049 VG_(cl_auxv_fd) = fd; 2050 2051 #if defined(VGO_solaris) 2052 /* Fake /proc/<pid>/psinfo on Solaris. 2053 * Contents will be fetched and partially faked later on the fly. */ 2054 VG_(debugLog)(1, "main", "Create fake /proc/<pid>/psinfo\n"); 2055 2056 VG_(sprintf)(buf, "proc_%d_psinfo", VG_(getpid)()); 2057 fd = VG_(mkstemp)( buf, buf2 ); 2058 if (fd == -1) 2059 VG_(err_config_error)("Can't create client psinfo file in %s\n", buf2); 2060 2061 /* Now delete it, but hang on to the fd. */ 2062 r = VG_(unlink)( buf2 ); 2063 if (r) 2064 VG_(err_config_error)("Can't delete client psinfo file in %s\n", buf2); 2065 2066 VG_(cl_psinfo_fd) = fd; 2067 #endif /* VGO_solaris */ 2068 } 2069 #endif 2070 2071 //-------------------------------------------------------------- 2072 // Init tool part 1: pre_clo_init 2073 // p: setup_client_stack() [for 'VG_(client_arg[cv]'] 2074 // p: setup_file_descriptors() [for 'VG_(fd_xxx_limit)'] 2075 //-------------------------------------------------------------- 2076 VG_(debugLog)(1, "main", "Initialise the tool part 1 (pre_clo_init)\n"); 2077 VG_(tl_pre_clo_init)(); 2078 // Activate var info readers, if the tool asked for it: 2079 if (VG_(needs).var_info) 2080 VG_(clo_read_var_info) = True; 2081 2082 //-------------------------------------------------------------- 2083 // If --tool and --help/--help-debug was given, now give the core+tool 2084 // help message 2085 // p: early_process_cmd_line_options() [for 'need_help'] 2086 // p: tl_pre_clo_init [for 'VG_(tdict).usage'] 2087 //-------------------------------------------------------------- 2088 VG_(debugLog)(1, "main", "Print help and quit, if requested\n"); 2089 if (need_help) { 2090 usage_NORETURN(/*--help-debug?*/need_help >= 2); 2091 } 2092 2093 //-------------------------------------------------------------- 2094 // Process command line options to Valgrind + tool 2095 // p: setup_client_stack() [for 'VG_(client_arg[cv]'] 2096 // p: setup_file_descriptors() [for 'VG_(fd_xxx_limit)'] 2097 //-------------------------------------------------------------- 2098 VG_(debugLog)(1, "main", 2099 "(main_) Process Valgrind's command line options, " 2100 "setup logging\n"); 2101 main_process_cmd_line_options ( &logging_to_fd, &xml_fname_unexpanded, 2102 toolname ); 2103 2104 //-------------------------------------------------------------- 2105 // Zeroise the millisecond counter by doing a first read of it. 2106 // p: none 2107 //-------------------------------------------------------------- 2108 (void) VG_(read_millisecond_timer)(); 2109 2110 //-------------------------------------------------------------- 2111 // Print the preamble 2112 // p: tl_pre_clo_init [for 'VG_(details).name' and friends] 2113 // p: main_process_cmd_line_options() 2114 // [for VG_(clo_verbosity), VG_(clo_xml), 2115 // logging_to_fd, xml_fname_unexpanded] 2116 //-------------------------------------------------------------- 2117 VG_(debugLog)(1, "main", "Print the preamble...\n"); 2118 print_preamble(logging_to_fd, xml_fname_unexpanded, toolname); 2119 VG_(debugLog)(1, "main", "...finished the preamble\n"); 2120 2121 //-------------------------------------------------------------- 2122 // Init tool part 2: post_clo_init 2123 // p: setup_client_stack() [for 'VG_(client_arg[cv]'] 2124 // p: setup_file_descriptors() [for 'VG_(fd_xxx_limit)'] 2125 // p: print_preamble() [so any warnings printed in post_clo_init 2126 // are shown after the preamble] 2127 //-------------------------------------------------------------- 2128 VG_(debugLog)(1, "main", "Initialise the tool part 2 (post_clo_init)\n"); 2129 VG_TDICT_CALL(tool_post_clo_init); 2130 { 2131 /* The tool's "needs" will by now be finalised, since it has no 2132 further opportunity to specify them. So now sanity check 2133 them. */ 2134 const HChar* s; 2135 Bool ok; 2136 ok = VG_(sanity_check_needs)( &s ); 2137 if (!ok) { 2138 VG_(core_panic)(s); 2139 } 2140 } 2141 2142 //-------------------------------------------------------------- 2143 // Initialise translation table and translation cache 2144 // p: aspacem [??] 2145 // p: tl_pre_clo_init [for 'VG_(details).avg_translation_sizeB'] 2146 //-------------------------------------------------------------- 2147 VG_(debugLog)(1, "main", "Initialise TT/TC\n"); 2148 VG_(init_tt_tc)(); 2149 2150 //-------------------------------------------------------------- 2151 // Initialise the redirect table. 2152 // p: init_tt_tc [so it can call VG_(search_transtab) safely] 2153 // p: aspacem [so can change ownership of sysinfo pages] 2154 //-------------------------------------------------------------- 2155 VG_(debugLog)(1, "main", "Initialise redirects\n"); 2156 VG_(redir_initialise)(); 2157 2158 //-------------------------------------------------------------- 2159 // Allow GDB attach 2160 // p: main_process_cmd_line_options() [for VG_(clo_wait_for_gdb)] 2161 //-------------------------------------------------------------- 2162 /* Hook to delay things long enough so we can get the pid and 2163 attach GDB in another shell. */ 2164 if (VG_(clo_wait_for_gdb)) { 2165 ULong iters, q; 2166 VG_(debugLog)(1, "main", "Wait for GDB\n"); 2167 VG_(printf)("pid=%d, entering delay loop\n", VG_(getpid)()); 2168 2169 # if defined(VGP_x86_linux) 2170 iters = 10; 2171 # elif defined(VGP_amd64_linux) || defined(VGP_ppc64be_linux) \ 2172 || defined(VGP_ppc64le_linux) || defined(VGP_tilegx_linux) 2173 iters = 10; 2174 # elif defined(VGP_ppc32_linux) 2175 iters = 5; 2176 # elif defined(VGP_arm_linux) 2177 iters = 5; 2178 # elif defined(VGP_arm64_linux) 2179 iters = 5; 2180 # elif defined(VGP_s390x_linux) 2181 iters = 10; 2182 # elif defined(VGP_mips32_linux) || defined(VGP_mips64_linux) 2183 iters = 10; 2184 # elif defined(VGO_darwin) 2185 iters = 3; 2186 # elif defined(VGO_solaris) 2187 iters = 10; 2188 # else 2189 # error "Unknown plat" 2190 # endif 2191 2192 iters *= 1000ULL * 1000 * 1000; 2193 for (q = 0; q < iters; q++) 2194 __asm__ __volatile__("" ::: "memory","cc"); 2195 } 2196 2197 //-------------------------------------------------------------- 2198 // Search for file descriptors that are inherited from our parent 2199 // p: main_process_cmd_line_options [for VG_(clo_track_fds)] 2200 //-------------------------------------------------------------- 2201 if (VG_(clo_track_fds)) { 2202 VG_(debugLog)(1, "main", "Init preopened fds\n"); 2203 VG_(init_preopened_fds)(); 2204 } 2205 2206 #if defined(VGO_solaris) 2207 VG_(syswrap_init)(); 2208 #endif 2209 2210 //-------------------------------------------------------------- 2211 // Load debug info for the existing segments. 2212 // p: setup_code_redirect_table [so that redirs can be recorded] 2213 // p: mallocfree 2214 // p: probably: setup fds and process CLOs, so that logging works 2215 // p: initialise m_debuginfo 2216 // 2217 // While doing this, make a note of the debuginfo-handles that 2218 // come back from VG_(di_notify_mmap). 2219 // Later, in "Tell the tool about the initial client memory permissions" 2220 // (just below) we can then hand these handles off to the tool in 2221 // calls to VG_TRACK(new_mem_startup, ...). This gives the tool the 2222 // opportunity to make further queries to m_debuginfo before the 2223 // client is started, if it wants. We put this information into an 2224 // XArray, each handle along with the associated segment start address, 2225 // and search the XArray for the handles later, when calling 2226 // VG_TRACK(new_mem_startup, ...). 2227 //-------------------------------------------------------------- 2228 VG_(debugLog)(1, "main", "Load initial debug info\n"); 2229 2230 vg_assert(!addr2dihandle); 2231 addr2dihandle = VG_(newXA)( VG_(malloc), "main.vm.2", 2232 VG_(free), sizeof(Addr_n_ULong) ); 2233 2234 # if defined(VGO_linux) || defined(VGO_solaris) 2235 { Addr* seg_starts; 2236 Int n_seg_starts; 2237 Addr_n_ULong anu; 2238 2239 seg_starts = VG_(get_segment_starts)( SkFileC | SkFileV, &n_seg_starts ); 2240 vg_assert(seg_starts && n_seg_starts >= 0); 2241 2242 /* show them all to the debug info reader. allow_SkFileV has to 2243 be True here so that we read info from the valgrind executable 2244 itself. */ 2245 for (i = 0; i < n_seg_starts; i++) { 2246 anu.ull = VG_(di_notify_mmap)( seg_starts[i], True/*allow_SkFileV*/, 2247 -1/*Don't use_fd*/); 2248 /* anu.ull holds the debuginfo handle returned by di_notify_mmap, 2249 if any. */ 2250 if (anu.ull > 0) { 2251 anu.a = seg_starts[i]; 2252 VG_(addToXA)( addr2dihandle, &anu ); 2253 } 2254 } 2255 2256 VG_(free)( seg_starts ); 2257 } 2258 # elif defined(VGO_darwin) 2259 { Addr* seg_starts; 2260 Int n_seg_starts; 2261 seg_starts = VG_(get_segment_starts)( SkFileC, &n_seg_starts ); 2262 vg_assert(seg_starts && n_seg_starts >= 0); 2263 2264 /* show them all to the debug info reader. 2265 Don't read from V segments (unlike Linux) */ 2266 // GrP fixme really? 2267 for (i = 0; i < n_seg_starts; i++) { 2268 VG_(di_notify_mmap)( seg_starts[i], False/*don't allow_SkFileV*/, 2269 -1/*don't use_fd*/); 2270 } 2271 2272 VG_(free)( seg_starts ); 2273 } 2274 # else 2275 # error Unknown OS 2276 # endif 2277 2278 //-------------------------------------------------------------- 2279 // Tell aspacem of ownership change of the asm helpers, so that 2280 // m_translate allows them to be translated. However, only do this 2281 // after the initial debug info read, since making a hole in the 2282 // address range for the stage2 binary confuses the debug info reader. 2283 // p: aspacem 2284 //-------------------------------------------------------------- 2285 { Bool change_ownership_v_c_OK; 2286 Addr co_start = VG_PGROUNDDN( (Addr)&VG_(trampoline_stuff_start) ); 2287 Addr co_endPlus = VG_PGROUNDUP( (Addr)&VG_(trampoline_stuff_end) ); 2288 VG_(debugLog)(1,"redir", 2289 "transfer ownership V -> C of 0x%llx .. 0x%llx\n", 2290 (ULong)co_start, (ULong)co_endPlus-1 ); 2291 2292 change_ownership_v_c_OK 2293 = VG_(am_change_ownership_v_to_c)( co_start, co_endPlus - co_start ); 2294 vg_assert(change_ownership_v_c_OK); 2295 } 2296 2297 if (VG_(clo_xml)) { 2298 HChar buf[50]; // large enough 2299 VG_(elapsed_wallclock_time)(buf, sizeof buf); 2300 VG_(printf_xml)( "<status>\n" 2301 " <state>RUNNING</state>\n" 2302 " <time>%pS</time>\n" 2303 "</status>\n", 2304 buf ); 2305 VG_(printf_xml)( "\n" ); 2306 } 2307 2308 VG_(init_Threads)(); 2309 2310 //-------------------------------------------------------------- 2311 // Initialise the scheduler (phase 1) [generates tid_main] 2312 // p: none, afaics 2313 //-------------------------------------------------------------- 2314 VG_(debugLog)(1, "main", "Initialise scheduler (phase 1)\n"); 2315 tid_main = VG_(scheduler_init_phase1)(); 2316 vg_assert(tid_main >= 0 && tid_main < VG_N_THREADS 2317 && tid_main != VG_INVALID_THREADID); 2318 /* Tell the tool about tid_main */ 2319 VG_TRACK( pre_thread_ll_create, VG_INVALID_THREADID, tid_main ); 2320 2321 //-------------------------------------------------------------- 2322 // Tell the tool about the initial client memory permissions 2323 // p: aspacem 2324 // p: mallocfree 2325 // p: setup_client_stack 2326 // p: setup_client_dataseg 2327 // 2328 // For each segment we tell the client about, look up in 2329 // addr2dihandle as created above, to see if there's a debuginfo 2330 // handle associated with the segment, that we can hand along 2331 // to the tool, to be helpful. 2332 //-------------------------------------------------------------- 2333 VG_(debugLog)(1, "main", "Tell tool about initial permissions\n"); 2334 { Addr* seg_starts; 2335 Int n_seg_starts; 2336 2337 vg_assert(addr2dihandle); 2338 2339 /* Mark the main thread as running while we tell the tool about 2340 the client memory so that the tool can associate that memory 2341 with the main thread. */ 2342 vg_assert(VG_(running_tid) == VG_INVALID_THREADID); 2343 VG_(running_tid) = tid_main; 2344 2345 seg_starts = VG_(get_segment_starts)( SkFileC | SkAnonC | SkShmC, 2346 &n_seg_starts ); 2347 vg_assert(seg_starts && n_seg_starts >= 0); 2348 2349 /* Show client segments to the tool */ 2350 for (i = 0; i < n_seg_starts; i++) { 2351 Word j, n; 2352 NSegment const* seg 2353 = VG_(am_find_nsegment)( seg_starts[i] ); 2354 vg_assert(seg); 2355 vg_assert(seg->kind == SkFileC || seg->kind == SkAnonC || 2356 seg->kind == SkShmC); 2357 vg_assert(seg->start == seg_starts[i]); 2358 { 2359 VG_(debugLog)(2, "main", 2360 "tell tool about %010lx-%010lx %c%c%c\n", 2361 seg->start, seg->end, 2362 seg->hasR ? 'r' : '-', 2363 seg->hasW ? 'w' : '-', 2364 seg->hasX ? 'x' : '-' ); 2365 /* search addr2dihandle to see if we have an entry 2366 matching seg->start. */ 2367 n = VG_(sizeXA)( addr2dihandle ); 2368 for (j = 0; j < n; j++) { 2369 Addr_n_ULong* anl = VG_(indexXA)( addr2dihandle, j ); 2370 if (anl->a == seg->start) { 2371 vg_assert(anl->ull > 0); /* check it's a valid handle */ 2372 break; 2373 } 2374 } 2375 vg_assert(j >= 0 && j <= n); 2376 VG_TRACK( new_mem_startup, seg->start, seg->end+1-seg->start, 2377 seg->hasR, seg->hasW, seg->hasX, 2378 /* and the retrieved debuginfo handle, if any */ 2379 j < n 2380 ? ((Addr_n_ULong*)VG_(indexXA)( addr2dihandle, j ))->ull 2381 : 0 ); 2382 } 2383 } 2384 2385 VG_(free)( seg_starts ); 2386 VG_(deleteXA)( addr2dihandle ); 2387 2388 /* Also do the initial stack permissions. */ 2389 { 2390 SSizeT inaccessible_len; 2391 NSegment const* seg 2392 = VG_(am_find_nsegment)( the_iifii.initial_client_SP ); 2393 vg_assert(seg); 2394 vg_assert(seg->kind == SkAnonC); 2395 vg_assert(the_iifii.initial_client_SP >= seg->start); 2396 vg_assert(the_iifii.initial_client_SP <= seg->end); 2397 2398 /* Stuff below the initial SP is unaddressable. Take into 2399 account any ABI-mandated space below the stack pointer that 2400 is required (VG_STACK_REDZONE_SZB). setup_client_stack() 2401 will have allocated an extra page if a red zone is required, 2402 to be on the safe side. */ 2403 inaccessible_len = the_iifii.initial_client_SP - VG_STACK_REDZONE_SZB 2404 - seg->start; 2405 vg_assert(inaccessible_len >= 0); 2406 if (inaccessible_len > 0) 2407 VG_TRACK( die_mem_stack, 2408 seg->start, 2409 inaccessible_len ); 2410 VG_(debugLog)(2, "main", "mark stack inaccessible %010lx-%010lx\n", 2411 seg->start, 2412 the_iifii.initial_client_SP-1 - VG_STACK_REDZONE_SZB); 2413 } 2414 2415 /* Also the assembly helpers. */ 2416 VG_TRACK( new_mem_startup, 2417 (Addr)&VG_(trampoline_stuff_start), 2418 (Addr)&VG_(trampoline_stuff_end) 2419 - (Addr)&VG_(trampoline_stuff_start), 2420 False, /* readable? */ 2421 False, /* writable? */ 2422 True /* executable? */, 2423 0 /* di_handle: no associated debug info */ ); 2424 2425 /* Clear the running thread indicator */ 2426 VG_(running_tid) = VG_INVALID_THREADID; 2427 vg_assert(VG_(running_tid) == VG_INVALID_THREADID); 2428 2429 /* Darwin only: tell the tools where the client's kernel commpage 2430 is. It would be better to do this by telling aspacemgr about 2431 it -- see the now disused record_system_memory() in 2432 initimg-darwin.c -- but that causes the sync checker to fail, 2433 since the mapping doesn't appear in the kernel-supplied 2434 process map. So do it here instead. */ 2435 # if defined(VGP_amd64_darwin) 2436 VG_TRACK( new_mem_startup, 2437 0x7fffffe00000, 0x7ffffffff000-0x7fffffe00000, 2438 True, False, True, /* r-x */ 2439 0 /* di_handle: no associated debug info */ ); 2440 # elif defined(VGP_x86_darwin) 2441 VG_TRACK( new_mem_startup, 2442 0xfffec000, 0xfffff000-0xfffec000, 2443 True, False, True, /* r-x */ 2444 0 /* di_handle: no associated debug info */ ); 2445 # endif 2446 } 2447 2448 //-------------------------------------------------------------- 2449 // Initialise the scheduler (phase 2) 2450 // p: Initialise the scheduler (phase 1) [for tid_main] 2451 // p: setup_file_descriptors() [else VG_(safe_fd)() breaks] 2452 // p: setup_client_stack 2453 //-------------------------------------------------------------- 2454 VG_(debugLog)(1, "main", "Initialise scheduler (phase 2)\n"); 2455 { NSegment const* seg 2456 = VG_(am_find_nsegment)( the_iifii.initial_client_SP ); 2457 vg_assert(seg); 2458 vg_assert(seg->kind == SkAnonC); 2459 vg_assert(the_iifii.initial_client_SP >= seg->start); 2460 vg_assert(the_iifii.initial_client_SP <= seg->end); 2461 VG_(scheduler_init_phase2)( tid_main, 2462 seg->end, the_iifii.clstack_max_size ); 2463 } 2464 2465 //-------------------------------------------------------------- 2466 // Set up state for the root thread 2467 // p: ? 2468 // setup_scheduler() [for sched-specific thread 1 stuff] 2469 // VG_(ii_create_image) [for 'the_iicii' initial info] 2470 //-------------------------------------------------------------- 2471 VG_(debugLog)(1, "main", "Finalise initial image\n"); 2472 { /* Mark the main thread as running while we tell the tool about 2473 the client memory which could be tracked during initial image 2474 finalisation. So the tool can associate that memory with the 2475 main thread. */ 2476 vg_assert(VG_(running_tid) == VG_INVALID_THREADID); 2477 VG_(running_tid) = tid_main; 2478 2479 VG_(ii_finalise_image)( the_iifii ); 2480 2481 /* Clear the running thread indicator */ 2482 VG_(running_tid) = VG_INVALID_THREADID; 2483 vg_assert(VG_(running_tid) == VG_INVALID_THREADID); 2484 } 2485 2486 //-------------------------------------------------------------- 2487 // Initialise the signal handling subsystem 2488 // p: n/a 2489 //-------------------------------------------------------------- 2490 // Nb: temporarily parks the saved blocking-mask in saved_sigmask. 2491 VG_(debugLog)(1, "main", "Initialise signal management\n"); 2492 /* Check that the kernel-interface signal definitions look sane */ 2493 VG_(vki_do_initial_consistency_checks)(); 2494 /* .. and go on to use them. */ 2495 VG_(sigstartup_actions)(); 2496 2497 //-------------------------------------------------------------- 2498 // Read suppression file 2499 // p: main_process_cmd_line_options() [for VG_(clo_suppressions)] 2500 //-------------------------------------------------------------- 2501 if (VG_(needs).core_errors || VG_(needs).tool_errors) { 2502 VG_(debugLog)(1, "main", "Load suppressions\n"); 2503 VG_(load_suppressions)(); 2504 } 2505 2506 //-------------------------------------------------------------- 2507 // register client stack 2508 //-------------------------------------------------------------- 2509 VG_(clstk_id) = VG_(register_stack)(VG_(clstk_start_base), VG_(clstk_end)); 2510 2511 //-------------------------------------------------------------- 2512 // Show the address space state so far 2513 //-------------------------------------------------------------- 2514 VG_(debugLog)(1, "main", "\n"); 2515 VG_(debugLog)(1, "main", "\n"); 2516 VG_(am_show_nsegments)(1,"Memory layout at client startup"); 2517 VG_(debugLog)(1, "main", "\n"); 2518 VG_(debugLog)(1, "main", "\n"); 2519 2520 //-------------------------------------------------------------- 2521 // Run! 2522 //-------------------------------------------------------------- 2523 VG_(debugLog)(1, "main", "Running thread 1\n"); 2524 2525 /* As a result of the following call, the last thread standing 2526 eventually winds up running shutdown_actions_NORETURN 2527 just below. Unfortunately, simply exporting said function 2528 causes m_main to be part of a module cycle, which is pretty 2529 nonsensical. So instead of doing that, the address of said 2530 function is stored in a global variable 'owned' by m_syswrap, 2531 and it uses that function pointer to get back here when it needs 2532 to. */ 2533 2534 /* Set continuation address. */ 2535 VG_(address_of_m_main_shutdown_actions_NORETURN) 2536 = & shutdown_actions_NORETURN; 2537 2538 /* Run the first thread, eventually ending up at the continuation 2539 address. */ 2540 VG_(main_thread_wrapper_NORETURN)(1); 2541 2542 /*NOTREACHED*/ 2543 vg_assert(0); 2544 } 2545 2546 /* Do everything which needs doing when the last thread exits or when 2547 a thread exits requesting a complete process exit. 2548 2549 We enter here holding The Lock. For the case VgSrc_ExitProcess we 2550 must never release it, because to do so would allow other threads 2551 to continue after the system is ostensibly shut down. So we must 2552 go to our grave, so to speak, holding the lock. 2553 2554 In fact, there is never any point in releasing the lock at this 2555 point - we have it, we're shutting down the entire system, and 2556 for the case VgSrc_ExitProcess doing so positively causes trouble. 2557 So don't. 2558 2559 The final_tidyup call makes a bit of a nonsense of the ExitProcess 2560 case, since it will run the libc_freeres function, thus allowing 2561 other lurking threads to run again. Hmm. */ 2562 2563 static 2564 void shutdown_actions_NORETURN( ThreadId tid, 2565 VgSchedReturnCode tids_schedretcode ) 2566 { 2567 VG_(debugLog)(1, "main", "entering VG_(shutdown_actions_NORETURN)\n"); 2568 VG_(am_show_nsegments)(1,"Memory layout at client shutdown"); 2569 2570 vg_assert(VG_(is_running_thread)(tid)); 2571 vg_assert(tids_schedretcode == VgSrc_ExitThread 2572 || tids_schedretcode == VgSrc_ExitProcess 2573 || tids_schedretcode == VgSrc_FatalSig ); 2574 2575 if (tids_schedretcode == VgSrc_ExitThread) { 2576 2577 // We are the last surviving thread. Right? 2578 vg_assert( VG_(count_living_threads)() == 1 ); 2579 2580 // Wait for all other threads to exit. 2581 // jrs: Huh? but they surely are already gone 2582 VG_(reap_threads)(tid); 2583 2584 // Clean the client up before the final report 2585 // this causes the libc_freeres function to run 2586 final_tidyup(tid); 2587 2588 /* be paranoid */ 2589 vg_assert(VG_(is_running_thread)(tid)); 2590 vg_assert(VG_(count_living_threads)() == 1); 2591 2592 } else { 2593 2594 // We may not be the last surviving thread. However, we 2595 // want to shut down the entire process. We hold the lock 2596 // and we need to keep hold of it all the way out, in order 2597 // that none of the other threads ever run again. 2598 vg_assert( VG_(count_living_threads)() >= 1 ); 2599 2600 // Clean the client up before the final report 2601 // this causes the libc_freeres function to run 2602 // perhaps this is unsafe, as per comment above 2603 final_tidyup(tid); 2604 2605 /* be paranoid */ 2606 vg_assert(VG_(is_running_thread)(tid)); 2607 vg_assert(VG_(count_living_threads)() >= 1); 2608 } 2609 2610 /* Final call to gdbserver, if requested. */ 2611 if (VG_(gdbserver_stop_at) (VgdbStopAt_Exit)) { 2612 VG_(umsg)("(action at exit) vgdb me ... \n"); 2613 VG_(gdbserver) (tid); 2614 } 2615 VG_(threads)[tid].status = VgTs_Empty; 2616 2617 //-------------------------------------------------------------- 2618 // Finalisation: cleanup, messages, etc. Order not so important, only 2619 // affects what order the messages come. 2620 //-------------------------------------------------------------- 2621 // First thing in the post-amble is a blank line. 2622 if (VG_(clo_xml)) 2623 VG_(printf_xml)("\n"); 2624 else if (VG_(clo_verbosity) > 0) 2625 VG_(message)(Vg_UserMsg, "\n"); 2626 2627 if (VG_(clo_xml)) { 2628 HChar buf[50]; // large enough 2629 VG_(elapsed_wallclock_time)(buf, sizeof buf); 2630 VG_(printf_xml)( "<status>\n" 2631 " <state>FINISHED</state>\n" 2632 " <time>%pS</time>\n" 2633 "</status>\n" 2634 "\n", 2635 buf); 2636 } 2637 2638 /* Print out file descriptor summary and stats. */ 2639 if (VG_(clo_track_fds)) 2640 VG_(show_open_fds)("at exit"); 2641 2642 /* Call the tool's finalisation function. This makes Memcheck's 2643 leak checker run, and possibly chuck a bunch of leak errors into 2644 the error management machinery. */ 2645 VG_TDICT_CALL(tool_fini, 0/*exitcode*/); 2646 2647 /* Show the error counts. */ 2648 if (VG_(clo_xml) 2649 && (VG_(needs).core_errors || VG_(needs).tool_errors)) { 2650 VG_(show_error_counts_as_XML)(); 2651 } 2652 2653 /* In XML mode, this merely prints the used suppressions. */ 2654 if (VG_(needs).core_errors || VG_(needs).tool_errors) 2655 VG_(show_all_errors)(VG_(clo_verbosity), VG_(clo_xml)); 2656 2657 if (VG_(clo_xml)) { 2658 VG_(printf_xml)("\n"); 2659 VG_(printf_xml)("</valgrindoutput>\n"); 2660 VG_(printf_xml)("\n"); 2661 } 2662 2663 VG_(sanity_check_general)( True /*include expensive checks*/ ); 2664 2665 if (VG_(clo_stats)) 2666 VG_(print_all_stats)(VG_(clo_verbosity) >= 1, /* Memory stats */ 2667 False /* tool prints stats in the tool fini */); 2668 2669 /* Show a profile of the heap(s) at shutdown. Optionally, first 2670 throw away all the debug info, as that makes it easy to spot 2671 leaks in the debuginfo reader. */ 2672 if (VG_(clo_profile_heap)) { 2673 if (0) VG_(di_discard_ALL_debuginfo)(); 2674 VG_(print_arena_cc_analysis)(); 2675 } 2676 2677 /* If profiling has been requested, but with zero interval, it 2678 means "profile at the end of the run only". In which case we 2679 need to dump the profile now. */ 2680 if (VG_(clo_profyle_sbs) && VG_(clo_profyle_interval) == 0) { 2681 VG_(get_and_show_SB_profile)(0/*denoting end-of-run*/); 2682 } 2683 2684 /* Print Vex storage stats */ 2685 if (0) 2686 LibVEX_ShowAllocStats(); 2687 2688 /* Flush any output cached by previous calls to VG_(message). */ 2689 VG_(message_flush)(); 2690 2691 /* Terminate gdbserver if ever it was started. We terminate it here 2692 so that it get the output above if output was redirected to 2693 gdb */ 2694 VG_(gdbserver_exit) (tid, tids_schedretcode); 2695 2696 /* Ok, finally exit in the os-specific way, according to the scheduler's 2697 return code. In short, if the (last) thread exited by calling 2698 sys_exit, do likewise; if the (last) thread stopped due to a fatal 2699 signal, terminate the entire system with that same fatal signal. */ 2700 VG_(debugLog)(1, "core_os", 2701 "VG_(terminate_NORETURN)(tid=%u)\n", tid); 2702 2703 switch (tids_schedretcode) { 2704 case VgSrc_ExitThread: /* the normal way out (Linux, Solaris) */ 2705 case VgSrc_ExitProcess: /* the normal way out (Darwin) */ 2706 /* Change the application return code to user's return code, 2707 if an error was found */ 2708 if (VG_(clo_error_exitcode) > 0 2709 && VG_(get_n_errs_found)() > 0) { 2710 VG_(client_exit)( VG_(clo_error_exitcode) ); 2711 } else { 2712 /* otherwise, return the client's exit code, in the normal 2713 way. */ 2714 VG_(client_exit)( VG_(threads)[tid].os_state.exitcode ); 2715 } 2716 /* NOT ALIVE HERE! */ 2717 VG_(core_panic)("entered the afterlife in main() -- ExitT/P"); 2718 break; /* what the hell :) */ 2719 2720 case VgSrc_FatalSig: 2721 /* We were killed by a fatal signal, so replicate the effect */ 2722 vg_assert(VG_(threads)[tid].os_state.fatalsig != 0); 2723 VG_(kill_self)(VG_(threads)[tid].os_state.fatalsig); 2724 /* we shouldn't be alive at this point. But VG_(kill_self) 2725 sometimes fails with EPERM on Darwin, for unclear reasons. */ 2726 # if defined(VGO_darwin) 2727 VG_(debugLog)(0, "main", "VG_(kill_self) failed. Exiting normally.\n"); 2728 VG_(exit)(0); /* bogus, but we really need to exit now */ 2729 /* fall through .. */ 2730 # endif 2731 VG_(core_panic)("main(): signal was supposed to be fatal"); 2732 break; 2733 2734 default: 2735 VG_(core_panic)("main(): unexpected scheduler return code"); 2736 } 2737 } 2738 2739 /* -------------------- */ 2740 2741 /* Final clean-up before terminating the process. 2742 Clean up the client by calling __libc_freeres() (if requested) 2743 This is Linux-specific? 2744 GrP fixme glibc-specific, anyway 2745 */ 2746 static void final_tidyup(ThreadId tid) 2747 { 2748 #if !defined(VGO_darwin) 2749 Addr __libc_freeres_wrapper = VG_(client___libc_freeres_wrapper); 2750 2751 vg_assert(VG_(is_running_thread)(tid)); 2752 2753 if ( !VG_(needs).libc_freeres || 2754 !VG_(clo_run_libc_freeres) || 2755 0 == __libc_freeres_wrapper ) 2756 return; /* can't/won't do it */ 2757 2758 # if defined(VGP_ppc64be_linux) 2759 Addr r2 = VG_(get_tocptr)( __libc_freeres_wrapper ); 2760 if (r2 == 0) { 2761 VG_(message)(Vg_UserMsg, 2762 "Caught __NR_exit, but can't run __libc_freeres()\n"); 2763 VG_(message)(Vg_UserMsg, 2764 " since cannot establish TOC pointer for it.\n"); 2765 return; 2766 } 2767 # endif 2768 2769 if (VG_(clo_verbosity) > 2 || 2770 VG_(clo_trace_syscalls) || 2771 VG_(clo_trace_sched)) 2772 VG_(message)(Vg_DebugMsg, 2773 "Caught __NR_exit; running __libc_freeres()\n"); 2774 2775 /* set thread context to point to libc_freeres_wrapper */ 2776 /* ppc64be-linux note: __libc_freeres_wrapper gives us the real 2777 function entry point, not a fn descriptor, so can use it 2778 directly. However, we need to set R2 (the toc pointer) 2779 appropriately. */ 2780 VG_(set_IP)(tid, __libc_freeres_wrapper); 2781 # if defined(VGP_ppc64be_linux) 2782 VG_(threads)[tid].arch.vex.guest_GPR2 = r2; 2783 # elif defined(VGP_ppc64le_linux) 2784 /* setting GPR2 but not really needed, GPR12 is needed */ 2785 VG_(threads)[tid].arch.vex.guest_GPR2 = __libc_freeres_wrapper; 2786 VG_(threads)[tid].arch.vex.guest_GPR12 = __libc_freeres_wrapper; 2787 # endif 2788 /* mips-linux note: we need to set t9 */ 2789 # if defined(VGP_mips32_linux) || defined(VGP_mips64_linux) 2790 VG_(threads)[tid].arch.vex.guest_r25 = __libc_freeres_wrapper; 2791 # endif 2792 2793 /* Block all blockable signals by copying the real block state into 2794 the thread's block state*/ 2795 VG_(sigprocmask)(VKI_SIG_BLOCK, NULL, &VG_(threads)[tid].sig_mask); 2796 VG_(threads)[tid].tmp_sig_mask = VG_(threads)[tid].sig_mask; 2797 2798 /* and restore handlers to default */ 2799 VG_(set_default_handler)(VKI_SIGSEGV); 2800 VG_(set_default_handler)(VKI_SIGBUS); 2801 VG_(set_default_handler)(VKI_SIGILL); 2802 VG_(set_default_handler)(VKI_SIGFPE); 2803 2804 // We were exiting, so assert that... 2805 vg_assert(VG_(is_exiting)(tid)); 2806 // ...but now we're not again 2807 VG_(threads)[tid].exitreason = VgSrc_None; 2808 2809 // run until client thread exits - ideally with LIBC_FREERES_DONE, 2810 // but exit/exitgroup/signal will do 2811 VG_(scheduler)(tid); 2812 2813 vg_assert(VG_(is_exiting)(tid)); 2814 #endif 2815 } 2816 2817 2818 /*====================================================================*/ 2819 /*=== Getting to main() alive: LINUX ===*/ 2820 /*====================================================================*/ 2821 2822 #if defined(VGO_linux) 2823 2824 /* If linking of the final executables is done with glibc present, 2825 then Valgrind starts at main() above as usual, and all of the 2826 following code is irrelevant. 2827 2828 However, this is not the intended mode of use. The plan is to 2829 avoid linking against glibc, by giving gcc the flags 2830 -nodefaultlibs -lgcc -nostartfiles at startup. 2831 2832 From this derive two requirements: 2833 2834 1. gcc may emit calls to memcpy, memmove and memset to deal with 2835 structure assignments etc. Since we have chosen to ignore all the 2836 "normal" supporting libraries, we have to provide our own 2837 implementations of them. No problem. 2838 2839 2. We have to provide a symbol "_start", to which the kernel 2840 hands control at startup. Hence the code below. 2841 */ 2842 2843 /* ---------------- Requirement 1 ---------------- */ 2844 2845 void* memcpy(void *dest, const void *src, SizeT n); 2846 void* memcpy(void *dest, const void *src, SizeT n) { 2847 return VG_(memcpy)(dest,src,n); 2848 } 2849 void* memmove(void *dest, const void *src, SizeT n); 2850 void* memmove(void *dest, const void *src, SizeT n) { 2851 return VG_(memmove)(dest,src,n); 2852 } 2853 void* memset(void *s, int c, SizeT n); 2854 void* memset(void *s, int c, SizeT n) { 2855 return VG_(memset)(s,c,n); 2856 } 2857 2858 /* BVA: abort() for those platforms that need it (PPC and ARM). */ 2859 void abort(void); 2860 void abort(void){ 2861 VG_(printf)("Something called raise().\n"); 2862 vg_assert(0); 2863 } 2864 2865 /* EAZG: ARM's EABI will call floating point exception handlers in 2866 libgcc which boil down to an abort or raise, that's usually defined 2867 in libc. Instead, define them here. */ 2868 #if defined(VGP_arm_linux) 2869 void raise(void); 2870 void raise(void){ 2871 VG_(printf)("Something called raise().\n"); 2872 vg_assert(0); 2873 } 2874 2875 void __aeabi_unwind_cpp_pr0(void); 2876 void __aeabi_unwind_cpp_pr0(void){ 2877 VG_(printf)("Something called __aeabi_unwind_cpp_pr0()\n"); 2878 vg_assert(0); 2879 } 2880 2881 void __aeabi_unwind_cpp_pr1(void); 2882 void __aeabi_unwind_cpp_pr1(void){ 2883 VG_(printf)("Something called __aeabi_unwind_cpp_pr1()\n"); 2884 vg_assert(0); 2885 } 2886 #endif 2887 2888 /* ---------------- Requirement 2 ---------------- */ 2889 2890 /* Glibc's sysdeps/i386/elf/start.S has the following gem of a 2891 comment, which explains how the stack looks right at process start 2892 (when _start is jumped to). Hence _start passes %esp to 2893 _start_in_C_linux, which extracts argc/argv/envp and starts up 2894 correctly. */ 2895 2896 /* This is the canonical entry point, usually the first thing in the text 2897 segment. The SVR4/i386 ABI (pages 3-31, 3-32) says that when the entry 2898 point runs, most registers' values are unspecified, except for: 2899 2900 %edx Contains a function pointer to be registered with `atexit'. 2901 This is how the dynamic linker arranges to have DT_FINI 2902 functions called for shared libraries that have been loaded 2903 before this code runs. 2904 2905 %esp The stack contains the arguments and environment: 2906 0(%esp) argc 2907 4(%esp) argv[0] 2908 ... 2909 (4*argc)(%esp) NULL 2910 (4*(argc+1))(%esp) envp[0] 2911 ... 2912 NULL 2913 */ 2914 2915 /* The kernel hands control to _start, which extracts the initial 2916 stack pointer and calls onwards to _start_in_C_linux. This also switches 2917 the new stack. */ 2918 #if defined(VGP_x86_linux) 2919 asm("\n" 2920 ".text\n" 2921 "\t.globl _start\n" 2922 "\t.type _start,@function\n" 2923 "_start:\n" 2924 /* set up the new stack in %eax */ 2925 "\tmovl $vgPlain_interim_stack, %eax\n" 2926 "\taddl $"VG_STRINGIFY(VG_STACK_GUARD_SZB)", %eax\n" 2927 "\taddl $"VG_STRINGIFY(VG_DEFAULT_STACK_ACTIVE_SZB)", %eax\n" 2928 "\tsubl $16, %eax\n" 2929 "\tandl $~15, %eax\n" 2930 /* install it, and collect the original one */ 2931 "\txchgl %eax, %esp\n" 2932 /* call _start_in_C_linux, passing it the startup %esp */ 2933 "\tpushl %eax\n" 2934 "\tcall _start_in_C_linux\n" 2935 "\thlt\n" 2936 ".previous\n" 2937 ); 2938 #elif defined(VGP_amd64_linux) 2939 asm("\n" 2940 ".text\n" 2941 "\t.globl _start\n" 2942 "\t.type _start,@function\n" 2943 "_start:\n" 2944 /* set up the new stack in %rdi */ 2945 "\tmovq $vgPlain_interim_stack, %rdi\n" 2946 "\taddq $"VG_STRINGIFY(VG_STACK_GUARD_SZB)", %rdi\n" 2947 "\taddq $"VG_STRINGIFY(VG_DEFAULT_STACK_ACTIVE_SZB)", %rdi\n" 2948 "\tandq $~15, %rdi\n" 2949 /* install it, and collect the original one */ 2950 "\txchgq %rdi, %rsp\n" 2951 /* call _start_in_C_linux, passing it the startup %rsp */ 2952 "\tcall _start_in_C_linux\n" 2953 "\thlt\n" 2954 ".previous\n" 2955 ); 2956 #elif defined(VGP_ppc32_linux) 2957 asm("\n" 2958 ".text\n" 2959 "\t.globl _start\n" 2960 "\t.type _start,@function\n" 2961 "_start:\n" 2962 /* set up the new stack in r16 */ 2963 "\tlis 16,vgPlain_interim_stack@ha\n" 2964 "\tla 16,vgPlain_interim_stack@l(16)\n" 2965 "\tlis 17,("VG_STRINGIFY(VG_STACK_GUARD_SZB)" >> 16)\n" 2966 "\tori 17,17,("VG_STRINGIFY(VG_STACK_GUARD_SZB)" & 0xFFFF)\n" 2967 "\tlis 18,("VG_STRINGIFY(VG_DEFAULT_STACK_ACTIVE_SZB)" >> 16)\n" 2968 "\tori 18,18,("VG_STRINGIFY(VG_DEFAULT_STACK_ACTIVE_SZB)" & 0xFFFF)\n" 2969 "\tadd 16,17,16\n" 2970 "\tadd 16,18,16\n" 2971 "\trlwinm 16,16,0,0,27\n" 2972 /* now r16 = &vgPlain_interim_stack + VG_STACK_GUARD_SZB + 2973 VG_DEFAULT_STACK_ACTIVE_SZB rounded down to the nearest 16-byte 2974 boundary. And r1 is the original SP. Set the SP to r16 and 2975 call _start_in_C_linux, passing it the initial SP. */ 2976 "\tmr 3,1\n" 2977 "\tmr 1,16\n" 2978 "\tbl _start_in_C_linux\n" 2979 "\ttrap\n" 2980 ".previous\n" 2981 ); 2982 #elif defined(VGP_ppc64be_linux) 2983 asm("\n" 2984 /* PPC64 ELF ABI says '_start' points to a function descriptor. 2985 So we must have one, and that is what goes into the .opd section. */ 2986 "\t.align 2\n" 2987 "\t.global _start\n" 2988 "\t.section \".opd\",\"aw\"\n" 2989 "\t.align 3\n" 2990 "_start:\n" 2991 "\t.quad ._start,.TOC.@tocbase,0\n" 2992 "\t.previous\n" 2993 "\t.type ._start,@function\n" 2994 "\t.global ._start\n" 2995 "._start:\n" 2996 /* set up the new stack in r16 */ 2997 "\tlis 16, vgPlain_interim_stack@highest\n" 2998 "\tori 16,16,vgPlain_interim_stack@higher\n" 2999 "\tsldi 16,16,32\n" 3000 "\toris 16,16,vgPlain_interim_stack@h\n" 3001 "\tori 16,16,vgPlain_interim_stack@l\n" 3002 "\txor 17,17,17\n" 3003 "\tlis 17,("VG_STRINGIFY(VG_STACK_GUARD_SZB)" >> 16)\n" 3004 "\tori 17,17,("VG_STRINGIFY(VG_STACK_GUARD_SZB)" & 0xFFFF)\n" 3005 "\txor 18,18,18\n" 3006 "\tlis 18,("VG_STRINGIFY(VG_DEFAULT_STACK_ACTIVE_SZB)" >> 16)\n" 3007 "\tori 18,18,("VG_STRINGIFY(VG_DEFAULT_STACK_ACTIVE_SZB)" & 0xFFFF)\n" 3008 "\tadd 16,17,16\n" 3009 "\tadd 16,18,16\n" 3010 "\trldicr 16,16,0,59\n" 3011 /* now r16 = &vgPlain_interim_stack + VG_STACK_GUARD_SZB + 3012 VG_DEFAULT_STACK_ACTIVE_SZB rounded down to the nearest 16-byte 3013 boundary. And r1 is the original SP. Set the SP to r16 and 3014 call _start_in_C_linux, passing it the initial SP. */ 3015 "\tmr 3,1\n" 3016 "\tmr 1,16\n" 3017 "\tlis 14, _start_in_C_linux@highest\n" 3018 "\tori 14,14,_start_in_C_linux@higher\n" 3019 "\tsldi 14,14,32\n" 3020 "\toris 14,14,_start_in_C_linux@h\n" 3021 "\tori 14,14,_start_in_C_linux@l\n" 3022 "\tld 14,0(14)\n" 3023 "\tmtctr 14\n" 3024 "\tbctrl\n" 3025 "\tnop\n" 3026 "\ttrap\n" 3027 ); 3028 #elif defined(VGP_ppc64le_linux) 3029 /* Little Endian uses ELF version 2 but in the future may also 3030 * support other ELF versions. 3031 */ 3032 asm("\n" 3033 "\t.align 2\n" 3034 "\t.global _start\n" 3035 "\t.type _start,@function\n" 3036 "_start:\n" 3037 "#if _CALL_ELF == 2 \n" 3038 "0: addis 2,12,.TOC.-0b@ha\n" 3039 " addi 2,2,.TOC.-0b@l\n" 3040 " .localentry _start, .-_start\n" 3041 "#endif \n" 3042 /* set up the new stack in r16 */ 3043 "\tlis 16, vgPlain_interim_stack@highest\n" 3044 "\tori 16,16,vgPlain_interim_stack@higher\n" 3045 "\tsldi 16,16,32\n" 3046 "\toris 16,16,vgPlain_interim_stack@h\n" 3047 "\tori 16,16,vgPlain_interim_stack@l\n" 3048 "\txor 17,17,17\n" 3049 "\tlis 17,("VG_STRINGIFY(VG_STACK_GUARD_SZB)" >> 16)\n" 3050 "\tori 17,17,("VG_STRINGIFY(VG_STACK_GUARD_SZB)" & 0xFFFF)\n" 3051 "\txor 18,18,18\n" 3052 "\tlis 18,("VG_STRINGIFY(VG_DEFAULT_STACK_ACTIVE_SZB)" >> 16)\n" 3053 "\tori 18,18,("VG_STRINGIFY(VG_DEFAULT_STACK_ACTIVE_SZB)" & 0xFFFF)\n" 3054 "\tadd 16,17,16\n" 3055 "\tadd 16,18,16\n" 3056 "\trldicr 16,16,0,59\n" 3057 /* now r16 = &vgPlain_interim_stack + VG_STACK_GUARD_SZB + 3058 VG_DEFAULT_STACK_ACTIVE_SZB rounded down to the nearest 16-byte 3059 boundary. And r1 is the original SP. Set the SP to r16 and 3060 call _start_in_C_linux, passing it the initial SP. */ 3061 "\tmr 3,1\n" 3062 "\tmr 1,16\n" 3063 "\tlis 14, _start_in_C_linux@highest\n" 3064 "\tori 14,14,_start_in_C_linux@higher\n" 3065 "\tsldi 14,14,32\n" 3066 "\toris 14,14,_start_in_C_linux@h\n" 3067 "\tori 14,14,_start_in_C_linux@l\n" 3068 "\tmtctr 14\n" 3069 "\tbctrl\n" 3070 "\tnop\n" 3071 "\ttrap\n" 3072 ); 3073 #elif defined(VGP_s390x_linux) 3074 /* 3075 This is the canonical entry point, usually the first thing in the text 3076 segment. Most registers' values are unspecified, except for: 3077 3078 %r14 Contains a function pointer to be registered with `atexit'. 3079 This is how the dynamic linker arranges to have DT_FINI 3080 functions called for shared libraries that have been loaded 3081 before this code runs. 3082 3083 %r15 The stack contains the arguments and environment: 3084 0(%r15) argc 3085 8(%r15) argv[0] 3086 ... 3087 (8*argc)(%r15) NULL 3088 (8*(argc+1))(%r15) envp[0] 3089 ... 3090 NULL 3091 */ 3092 asm("\n\t" 3093 ".text\n\t" 3094 ".globl _start\n\t" 3095 ".type _start,@function\n\t" 3096 "_start:\n\t" 3097 /* set up the new stack in %r1 */ 3098 "larl %r1, vgPlain_interim_stack\n\t" 3099 "larl %r5, 1f\n\t" 3100 "ag %r1, 0(%r5)\n\t" 3101 "ag %r1, 2f-1f(%r5)\n\t" 3102 "nill %r1, 0xFFF0\n\t" 3103 /* install it, and collect the original one */ 3104 "lgr %r2, %r15\n\t" 3105 "lgr %r15, %r1\n\t" 3106 /* call _start_in_C_linux, passing it the startup %r15 */ 3107 "brasl %r14, _start_in_C_linux\n\t" 3108 /* trigger execution of an invalid opcode -> halt machine */ 3109 "j .+2\n\t" 3110 "1: .quad "VG_STRINGIFY(VG_STACK_GUARD_SZB)"\n\t" 3111 "2: .quad "VG_STRINGIFY(VG_DEFAULT_STACK_ACTIVE_SZB)"\n\t" 3112 ".previous\n" 3113 ); 3114 #elif defined(VGP_arm_linux) 3115 asm("\n" 3116 "\t.text\n" 3117 "\t.align 4\n" 3118 "\t.type _start,#function\n" 3119 "\t.global _start\n" 3120 "_start:\n" 3121 "\tldr r0, [pc, #36]\n" 3122 "\tldr r1, [pc, #36]\n" 3123 "\tadd r0, r1, r0\n" 3124 "\tldr r1, [pc, #32]\n" 3125 "\tadd r0, r1, r0\n" 3126 "\tmvn r1, #15\n" 3127 "\tand r0, r0, r1\n" 3128 "\tmov r1, sp\n" 3129 "\tmov sp, r0\n" 3130 "\tmov r0, r1\n" 3131 "\tb _start_in_C_linux\n" 3132 "\t.word vgPlain_interim_stack\n" 3133 "\t.word "VG_STRINGIFY(VG_STACK_GUARD_SZB)"\n" 3134 "\t.word "VG_STRINGIFY(VG_DEFAULT_STACK_ACTIVE_SZB)"\n" 3135 ); 3136 #elif defined(VGP_arm64_linux) 3137 asm("\n" 3138 "\t.text\n" 3139 "\t.align 2\n" 3140 "\t.type _start,#function\n" 3141 "\t.global _start\n" 3142 "_start:\n" 3143 "\tadrp x0, vgPlain_interim_stack\n" 3144 "\tadd x0, x0, :lo12:vgPlain_interim_stack\n" 3145 // The next 2 assume that VG_STACK_GUARD_SZB fits in 32 bits 3146 "\tmov x1, (("VG_STRINGIFY(VG_STACK_GUARD_SZB)") >> 0) & 0xFFFF\n" 3147 "\tmovk x1, (("VG_STRINGIFY(VG_STACK_GUARD_SZB)") >> 16) & 0xFFFF," 3148 " lsl 16\n" 3149 "\tadd x0, x0, x1\n" 3150 // The next 2 assume that VG_DEFAULT_STACK_ACTIVE_SZB fits in 32 bits 3151 "\tmov x1, (("VG_STRINGIFY(VG_DEFAULT_STACK_ACTIVE_SZB)") >> 0) & 0xFFFF\n" 3152 "\tmovk x1, (("VG_STRINGIFY(VG_DEFAULT_STACK_ACTIVE_SZB)") >> 16) & 0xFFFF," 3153 " lsl 16\n" 3154 "\tadd x0, x0, x1\n" 3155 "\tand x0, x0, -16\n" 3156 "\tmov x1, sp\n" 3157 "\tmov sp, x0\n" 3158 "\tmov x0, x1\n" 3159 "\tb _start_in_C_linux\n" 3160 ); 3161 #elif defined(VGP_mips32_linux) 3162 asm("\n" 3163 "\t.type _gp_disp,@object\n" 3164 ".text\n" 3165 "\t.globl __start\n" 3166 "\t.type __start,@function\n" 3167 "__start:\n" 3168 3169 "\tbal 1f\n" 3170 "\tnop\n" 3171 3172 "1:\n" 3173 3174 "\tlui $28, %hi(_gp_disp)\n" 3175 "\taddiu $28, $28, %lo(_gp_disp)\n" 3176 "\taddu $28, $28, $31\n" 3177 /* t1/$9 <- Addr(interim_stack) */ 3178 "\tlui $9, %hi(vgPlain_interim_stack)\n" 3179 /* t1/$9 <- Addr(interim_stack) */ 3180 "\taddiu $9, %lo(vgPlain_interim_stack)\n" 3181 3182 3183 "\tli $10, "VG_STRINGIFY(VG_STACK_GUARD_SZB)"\n" 3184 "\tli $11, "VG_STRINGIFY(VG_DEFAULT_STACK_ACTIVE_SZB)"\n" 3185 3186 "\taddu $9, $9, $10\n" 3187 "\taddu $9, $9, $11\n" 3188 "\tli $12, 0xFFFFFFF0\n" 3189 "\tand $9, $9, $12\n" 3190 /* now t1/$9 = &vgPlain_interim_stack + VG_STACK_GUARD_SZB + 3191 VG_DEFAULT_STACK_ACTIVE_SZB rounded down to the nearest 16-byte 3192 boundary. And $29 is the original SP. Set the SP to t1 and 3193 call _start_in_C, passing it the initial SP. */ 3194 3195 "\tmove $4, $29\n" // a0 <- $sp (_start_in_C first arg) 3196 "\tmove $29, $9\n" // $sp <- t1 (new sp) 3197 3198 "\tlui $25, %hi(_start_in_C_linux)\n" 3199 "\taddiu $25, %lo(_start_in_C_linux)\n" 3200 3201 "\tbal _start_in_C_linux\n" 3202 "\tbreak 0x7\n" 3203 ".previous\n" 3204 ); 3205 #elif defined(VGP_mips64_linux) 3206 asm( 3207 ".text\n" 3208 ".globl __start\n" 3209 ".type __start,@function\n" 3210 "__start:\n" 3211 "\t.set noreorder\n" 3212 "\t.cpload $25\n" 3213 "\t.set reorder\n" 3214 "\t.cprestore 16\n" 3215 "\tlui $9, %hi(vgPlain_interim_stack)\n" 3216 /* t1/$9 <- Addr(interim_stack) */ 3217 "\tdaddiu $9, %lo(vgPlain_interim_stack)\n" 3218 3219 "\tli $10, "VG_STRINGIFY(VG_STACK_GUARD_SZB)"\n" 3220 "\tli $11, "VG_STRINGIFY(VG_DEFAULT_STACK_ACTIVE_SZB)"\n" 3221 3222 "\tdaddu $9, $9, $10\n" 3223 "\tdaddu $9, $9, $11\n" 3224 "\tli $12, 0xFFFFFF00\n" 3225 "\tand $9, $9, $12\n" 3226 /* now t1/$9 = &vgPlain_interim_stack + VG_STACK_GUARD_SZB + 3227 VG_DEFAULT_STACK_ACTIVE_SZB rounded down to the nearest 16-byte 3228 boundary. And $29 is the original SP. Set the SP to t1 and 3229 call _start_in_C, passing it the initial SP. */ 3230 3231 "\tmove $4, $29\n" // a0 <- $sp (_start_in_C first arg) 3232 "\tmove $29, $9\n" // $sp <- t1 (new sp) 3233 3234 "\tlui $9, %highest(_start_in_C_linux)\n" 3235 "\tori $9, %higher(_start_in_C_linux)\n" 3236 "\tdsll32 $9, $9, 0x0\n" 3237 "\tlui $10, %hi(_start_in_C_linux)\n" 3238 "\tdaddiu $10, %lo(_start_in_C_linux)\n" 3239 "\tdaddu $25, $9, $10\n" 3240 "\tjalr $25\n" 3241 "\tnop\n" 3242 ".previous\n" 3243 ); 3244 #elif defined(VGP_tilegx_linux) 3245 asm("\n" 3246 ".text\n" 3247 "\t.align 8\n" 3248 "\t.globl _start\n" 3249 "\t.type _start,@function\n" 3250 "_start:\n" 3251 3252 "\tjal 1f\n" 3253 "1:\n" 3254 3255 /* --FIXME, bundle them :) */ 3256 /* r19 <- Addr(interim_stack) */ 3257 "\tmoveli r19, hw2_last(vgPlain_interim_stack)\n" 3258 "\tshl16insli r19, r19, hw1(vgPlain_interim_stack)\n" 3259 "\tshl16insli r19, r19, hw0(vgPlain_interim_stack)\n" 3260 3261 "\tmoveli r20, hw1("VG_STRINGIFY(VG_STACK_GUARD_SZB)")\n" 3262 "\tshl16insli r20, r20, hw0("VG_STRINGIFY(VG_STACK_GUARD_SZB)")\n" 3263 "\tmoveli r21, hw1("VG_STRINGIFY(VG_DEFAULT_STACK_ACTIVE_SZB)")\n" 3264 "\tshl16insli r21, r21, hw0("VG_STRINGIFY(VG_DEFAULT_STACK_ACTIVE_SZB)")\n" 3265 "\tadd r19, r19, r20\n" 3266 "\tadd r19, r19, r21\n" 3267 3268 "\tmovei r12, 0x0F\n" 3269 "\tnor r12, zero, r12\n" 3270 3271 "\tand r19, r19, r12\n" 3272 3273 /* now r19 = &vgPlain_interim_stack + VG_STACK_GUARD_SZB + 3274 VG_STACK_ACTIVE_SZB rounded down to the nearest 16-byte 3275 boundary. And $54 is the original SP. Set the SP to r0 and 3276 call _start_in_C, passing it the initial SP. */ 3277 3278 "\tmove r0, r54\n" // r0 <- $sp (_start_in_C first arg) 3279 "\tmove r54, r19\n" // $sp <- r19 (new sp) 3280 3281 "\tjal _start_in_C_linux\n" 3282 ); 3283 #else 3284 # error "Unknown linux platform" 3285 #endif 3286 3287 /* --- !!! --- EXTERNAL HEADERS start --- !!! --- */ 3288 #define _GNU_SOURCE 3289 #define _FILE_OFFSET_BITS 64 3290 /* This is in order to get AT_NULL and AT_PAGESIZE. */ 3291 #include <elf.h> 3292 /* --- !!! --- EXTERNAL HEADERS end --- !!! --- */ 3293 3294 /* Avoid compiler warnings: this fn _is_ used, but labelling it 3295 'static' causes gcc to complain it isn't. 3296 attribute 'used' also ensures the code is not eliminated at link 3297 time */ 3298 __attribute__ ((used)) 3299 void _start_in_C_linux ( UWord* pArgc ); 3300 __attribute__ ((used)) 3301 void _start_in_C_linux ( UWord* pArgc ) 3302 { 3303 Int r; 3304 Word argc = pArgc[0]; 3305 HChar** argv = (HChar**)&pArgc[1]; 3306 HChar** envp = (HChar**)&pArgc[1+argc+1]; 3307 3308 // For an inner Valgrind, register the interim stack asap. 3309 // This is needed to allow the outer valgrind to do stacktraces during init. 3310 // Note that this stack is not unregistered when the main thread 3311 // is switching to the (real) stack. Unregistering this would imply 3312 // to save the stack id in a global variable, and have a "if" 3313 // in run_a_thread_NORETURN to do the unregistration only for the 3314 // main thread. This unregistration is not worth this complexity. 3315 INNER_REQUEST 3316 ((void) VALGRIND_STACK_REGISTER 3317 (&VG_(interim_stack).bytes[0], 3318 &VG_(interim_stack).bytes[0] + sizeof(VG_(interim_stack)))); 3319 3320 VG_(memset)( &the_iicii, 0, sizeof(the_iicii) ); 3321 VG_(memset)( &the_iifii, 0, sizeof(the_iifii) ); 3322 3323 the_iicii.sp_at_startup = (Addr)pArgc; 3324 3325 # if defined(VGP_ppc32_linux) || defined(VGP_ppc64be_linux) \ 3326 || defined(VGP_ppc64le_linux) || defined(VGP_arm64_linux) 3327 { 3328 /* ppc32/ppc64 can be configured with different page sizes. 3329 Determine this early. This is an ugly hack and really should 3330 be moved into valgrind_main. */ 3331 UWord *sp = &pArgc[1+argc+1]; 3332 while (*sp++ != 0) 3333 ; 3334 for (; *sp != AT_NULL && *sp != AT_PAGESZ; sp += 2); 3335 if (*sp == AT_PAGESZ) { 3336 VKI_PAGE_SIZE = sp[1]; 3337 for (VKI_PAGE_SHIFT = 12; 3338 VKI_PAGE_SHIFT <= VKI_MAX_PAGE_SHIFT; VKI_PAGE_SHIFT++) 3339 if (VKI_PAGE_SIZE == (1UL << VKI_PAGE_SHIFT)) 3340 break; 3341 } 3342 } 3343 # endif 3344 3345 r = valgrind_main( (Int)argc, argv, envp ); 3346 /* NOTREACHED */ 3347 VG_(exit)(r); 3348 } 3349 3350 3351 /*====================================================================*/ 3352 /*=== Getting to main() alive: darwin ===*/ 3353 /*====================================================================*/ 3354 3355 #elif defined(VGO_darwin) 3356 3357 /* 3358 Memory layout established by kernel: 3359 3360 0(%esp) argc 3361 4(%esp) argv[0] 3362 ... 3363 argv[argc-1] 3364 NULL 3365 envp[0] 3366 ... 3367 envp[n] 3368 NULL 3369 executable name (presumably, a pointer to it) 3370 NULL 3371 3372 Ditto in the 64-bit case, except all offsets from SP are obviously 3373 twice as large. 3374 */ 3375 3376 /* The kernel hands control to _start, which extracts the initial 3377 stack pointer and calls onwards to _start_in_C_darwin. This also 3378 switches to the new stack. */ 3379 #if defined(VGP_x86_darwin) 3380 asm("\n" 3381 ".text\n" 3382 ".align 2,0x90\n" 3383 "\t.globl __start\n" 3384 "__start:\n" 3385 /* set up the new stack in %eax */ 3386 "\tmovl $_vgPlain_interim_stack, %eax\n" 3387 "\taddl $"VG_STRINGIFY(VG_STACK_GUARD_SZB)", %eax\n" 3388 "\taddl $"VG_STRINGIFY(VG_DEFAULT_STACK_ACTIVE_SZB)", %eax\n" 3389 "\tsubl $16, %eax\n" 3390 "\tandl $~15, %eax\n" 3391 /* install it, and collect the original one */ 3392 "\txchgl %eax, %esp\n" 3393 "\tsubl $12, %esp\n" // keep stack 16 aligned; see #295428 3394 /* call _start_in_C_darwin, passing it the startup %esp */ 3395 "\tpushl %eax\n" 3396 "\tcall __start_in_C_darwin\n" 3397 "\tint $3\n" 3398 "\tint $3\n" 3399 ); 3400 #elif defined(VGP_amd64_darwin) 3401 asm("\n" 3402 ".text\n" 3403 "\t.globl __start\n" 3404 ".align 3,0x90\n" 3405 "__start:\n" 3406 /* set up the new stack in %rdi */ 3407 "\tmovabsq $_vgPlain_interim_stack, %rdi\n" 3408 "\taddq $"VG_STRINGIFY(VG_STACK_GUARD_SZB)", %rdi\n" 3409 "\taddq $"VG_STRINGIFY(VG_DEFAULT_STACK_ACTIVE_SZB)", %rdi\n" 3410 "\tandq $~15, %rdi\n" 3411 /* install it, and collect the original one */ 3412 "\txchgq %rdi, %rsp\n" 3413 /* call _start_in_C_darwin, passing it the startup %rsp */ 3414 "\tcall __start_in_C_darwin\n" 3415 "\tint $3\n" 3416 "\tint $3\n" 3417 ); 3418 #endif 3419 3420 void* __memcpy_chk(void *dest, const void *src, SizeT n, SizeT n2); 3421 void* __memcpy_chk(void *dest, const void *src, SizeT n, SizeT n2) { 3422 // skip check 3423 return VG_(memcpy)(dest,src,n); 3424 } 3425 void* __memset_chk(void *s, int c, SizeT n, SizeT n2); 3426 void* __memset_chk(void *s, int c, SizeT n, SizeT n2) { 3427 // skip check 3428 return VG_(memset)(s,c,n); 3429 } 3430 void bzero(void *s, SizeT n); 3431 void bzero(void *s, SizeT n) { 3432 VG_(memset)(s,0,n); 3433 } 3434 3435 void* memcpy(void *dest, const void *src, SizeT n); 3436 void* memcpy(void *dest, const void *src, SizeT n) { 3437 return VG_(memcpy)(dest,src,n); 3438 } 3439 void* memset(void *s, int c, SizeT n); 3440 void* memset(void *s, int c, SizeT n) { 3441 return VG_(memset)(s,c,n); 3442 } 3443 3444 /* Avoid compiler warnings: this fn _is_ used, but labelling it 3445 'static' causes gcc to complain it isn't. */ 3446 void _start_in_C_darwin ( UWord* pArgc ); 3447 void _start_in_C_darwin ( UWord* pArgc ) 3448 { 3449 Int r; 3450 Int argc = *(Int *)pArgc; // not pArgc[0] on LP64 3451 HChar** argv = (HChar**)&pArgc[1]; 3452 HChar** envp = (HChar**)&pArgc[1+argc+1]; 3453 3454 // See _start_in_C_linux 3455 INNER_REQUEST 3456 ((void) VALGRIND_STACK_REGISTER 3457 (&VG_(interim_stack).bytes[0], 3458 &VG_(interim_stack).bytes[0] + sizeof(VG_(interim_stack)))); 3459 3460 VG_(memset)( &the_iicii, 0, sizeof(the_iicii) ); 3461 VG_(memset)( &the_iifii, 0, sizeof(the_iifii) ); 3462 3463 the_iicii.sp_at_startup = (Addr)pArgc; 3464 3465 r = valgrind_main( (Int)argc, argv, envp ); 3466 /* NOTREACHED */ 3467 VG_(exit)(r); 3468 } 3469 3470 /*====================================================================*/ 3471 /*=== Getting to main() alive: Solaris ===*/ 3472 /*====================================================================*/ 3473 #elif defined(VGO_solaris) 3474 #if defined(VGP_x86_solaris) 3475 /* The kernel hands control to _start, which extracts the initial stack 3476 pointer and calls onwards to _start_in_C_solaris. This also switches to 3477 the new stack. */ 3478 asm("\n" 3479 "\t.text\n" 3480 "\t.globl _start\n" 3481 "\t.type _start, @function\n" 3482 "_start:\n" 3483 /* Set up the new stack in %eax. */ 3484 "\tmovl $vgPlain_interim_stack, %eax\n" 3485 "\taddl $"VG_STRINGIFY(VG_STACK_GUARD_SZB)", %eax\n" 3486 "\taddl $"VG_STRINGIFY(VG_DEFAULT_STACK_ACTIVE_SZB)", %eax\n" 3487 "\tandl $~15, %eax\n" 3488 /* Install it, and collect the original one. */ 3489 "\txchgl %eax, %esp\n" 3490 "\tsubl $12, %esp\n" /* Keep stack 16-byte aligned. */ 3491 /* Call _start_in_C_solaris, passing it the startup %esp. */ 3492 "\tpushl %eax\n" 3493 "\tcall _start_in_C_solaris\n" 3494 /* NOTREACHED */ 3495 "\thlt\n" 3496 "\t.previous\n" 3497 ); 3498 #elif defined(VGP_amd64_solaris) 3499 asm("\n" 3500 ".text\n" 3501 "\t.globl _start\n" 3502 "\t.type _start, @function\n" 3503 "_start:\n" 3504 /* Set up the new stack in %rdi. */ 3505 "\tmovq $vgPlain_interim_stack, %rdi\n" 3506 "\taddq $"VG_STRINGIFY(VG_STACK_GUARD_SZB)", %rdi\n" 3507 "\taddq $"VG_STRINGIFY(VG_DEFAULT_STACK_ACTIVE_SZB)", %rdi\n" 3508 "\tandq $~15, %rdi\n" 3509 /* Install it, and collect the original one. */ 3510 "\txchgq %rdi, %rsp\n" 3511 /* Call _start_in_C_solaris, passing it the startup %rsp. */ 3512 "\tcall _start_in_C_solaris\n" 3513 /* NOTREACHED */ 3514 "\thlt\n" 3515 ".previous\n" 3516 ); 3517 #else 3518 # error "Unknown Solaris platform" 3519 #endif 3520 3521 void *memcpy(void *dest, const void *src, size_t n); 3522 void *memcpy(void *dest, const void *src, size_t n) { 3523 return VG_(memcpy)(dest, src, n); 3524 } 3525 3526 __attribute__ ((used)) 3527 void _start_in_C_solaris ( UWord* pArgc ); 3528 __attribute__ ((used)) 3529 void _start_in_C_solaris ( UWord* pArgc ) 3530 { 3531 Int r; 3532 Word argc = pArgc[0]; 3533 HChar** argv = (HChar**)&pArgc[1]; 3534 HChar** envp = (HChar**)&pArgc[1 + argc + 1]; 3535 3536 VG_(memset)( &the_iicii, 0, sizeof(the_iicii) ); 3537 VG_(memset)( &the_iifii, 0, sizeof(the_iifii) ); 3538 3539 the_iicii.sp_at_startup = (Addr)pArgc; 3540 3541 r = valgrind_main((Int)argc, argv, envp); 3542 /* NOTREACHED */ 3543 VG_(exit)(r); 3544 } 3545 3546 #else 3547 # error "Unknown OS" 3548 #endif 3549 3550 3551 Addr VG_(get_initial_client_SP)( void ) 3552 { 3553 return the_iifii.initial_client_SP; 3554 } 3555 3556 /*====================================================================*/ 3557 /*=== {u,}{div,mod}di3 replacements ===*/ 3558 /*====================================================================*/ 3559 3560 /* For static linking on x86-darwin, we need to supply our own 64-bit 3561 integer division code, else the link dies thusly: 3562 3563 ld_classic: Undefined symbols: 3564 ___udivdi3 3565 ___umoddi3 3566 */ 3567 #if defined(VGP_x86_darwin) 3568 3569 /* Routines for doing signed/unsigned 64 x 64 ==> 64 div and mod 3570 (udivdi3, umoddi3, divdi3, moddi3) using only 32 x 32 ==> 32 3571 division. Cobbled together from 3572 3573 http://www.hackersdelight.org/HDcode/divlu.c 3574 http://www.hackersdelight.org/HDcode/divls.c 3575 http://www.hackersdelight.org/HDcode/newCode/divDouble.c 3576 3577 The code from those three files is covered by the following license, 3578 as it appears at: 3579 3580 http://www.hackersdelight.org/permissions.htm 3581 3582 You are free to use, copy, and distribute any of the code on 3583 this web site, whether modified by you or not. You need not give 3584 attribution. This includes the algorithms (some of which appear 3585 in Hacker's Delight), the Hacker's Assistant, and any code 3586 submitted by readers. Submitters implicitly agree to this. 3587 */ 3588 3589 /* Long division, unsigned (64/32 ==> 32). 3590 This procedure performs unsigned "long division" i.e., division of a 3591 64-bit unsigned dividend by a 32-bit unsigned divisor, producing a 3592 32-bit quotient. In the overflow cases (divide by 0, or quotient 3593 exceeds 32 bits), it returns a remainder of 0xFFFFFFFF (an impossible 3594 value). 3595 The dividend is u1 and u0, with u1 being the most significant word. 3596 The divisor is parameter v. The value returned is the quotient. 3597 Max line length is 57, to fit in hacker.book. */ 3598 3599 static Int nlz32(UInt x) 3600 { 3601 Int n; 3602 if (x == 0) return(32); 3603 n = 0; 3604 if (x <= 0x0000FFFF) {n = n +16; x = x <<16;} 3605 if (x <= 0x00FFFFFF) {n = n + 8; x = x << 8;} 3606 if (x <= 0x0FFFFFFF) {n = n + 4; x = x << 4;} 3607 if (x <= 0x3FFFFFFF) {n = n + 2; x = x << 2;} 3608 if (x <= 0x7FFFFFFF) {n = n + 1;} 3609 return n; 3610 } 3611 3612 /* 64 x 32 ==> 32 unsigned division, using only 32 x 32 ==> 32 3613 division as a primitive. */ 3614 static UInt divlu2(UInt u1, UInt u0, UInt v, UInt *r) 3615 { 3616 const UInt b = 65536; // Number base (16 bits). 3617 UInt un1, un0, // Norm. dividend LSD's. 3618 vn1, vn0, // Norm. divisor digits. 3619 q1, q0, // Quotient digits. 3620 un32, un21, un10, // Dividend digit pairs. 3621 rhat; // A remainder. 3622 Int s; // Shift amount for norm. 3623 3624 if (u1 >= v) { // If overflow, set rem. 3625 if (r != NULL) // to an impossible value, 3626 *r = 0xFFFFFFFF; // and return the largest 3627 return 0xFFFFFFFF;} // possible quotient. 3628 3629 s = nlz32(v); // 0 <= s <= 31. 3630 v = v << s; // Normalize divisor. 3631 vn1 = v >> 16; // Break divisor up into 3632 vn0 = v & 0xFFFF; // two 16-bit digits. 3633 3634 un32 = (u1 << s) | ((u0 >> (32 - s)) & (-s >> 31)); 3635 un10 = u0 << s; // Shift dividend left. 3636 3637 un1 = un10 >> 16; // Break right half of 3638 un0 = un10 & 0xFFFF; // dividend into two digits. 3639 3640 q1 = un32/vn1; // Compute the first 3641 rhat = un32 - q1*vn1; // quotient digit, q1. 3642 again1: 3643 if (q1 >= b || q1*vn0 > b*rhat + un1) { 3644 q1 = q1 - 1; 3645 rhat = rhat + vn1; 3646 if (rhat < b) goto again1;} 3647 3648 un21 = un32*b + un1 - q1*v; // Multiply and subtract. 3649 3650 q0 = un21/vn1; // Compute the second 3651 rhat = un21 - q0*vn1; // quotient digit, q0. 3652 again2: 3653 if (q0 >= b || q0*vn0 > b*rhat + un0) { 3654 q0 = q0 - 1; 3655 rhat = rhat + vn1; 3656 if (rhat < b) goto again2;} 3657 3658 if (r != NULL) // If remainder is wanted, 3659 *r = (un21*b + un0 - q0*v) >> s; // return it. 3660 return q1*b + q0; 3661 } 3662 3663 3664 /* 64 x 32 ==> 32 signed division, using only 32 x 32 ==> 32 division 3665 as a primitive. */ 3666 static Int divls(Int u1, UInt u0, Int v, Int *r) 3667 { 3668 Int q, uneg, vneg, diff, borrow; 3669 3670 uneg = u1 >> 31; // -1 if u < 0. 3671 if (uneg) { // Compute the absolute 3672 u0 = -u0; // value of the dividend u. 3673 borrow = (u0 != 0); 3674 u1 = -u1 - borrow;} 3675 3676 vneg = v >> 31; // -1 if v < 0. 3677 v = (v ^ vneg) - vneg; // Absolute value of v. 3678 3679 if ((UInt)u1 >= (UInt)v) goto overflow; 3680 3681 q = divlu2(u1, u0, v, (UInt *)r); 3682 3683 diff = uneg ^ vneg; // Negate q if signs of 3684 q = (q ^ diff) - diff; // u and v differed. 3685 if (uneg && r != NULL) 3686 *r = -*r; 3687 3688 if ((diff ^ q) < 0 && q != 0) { // If overflow, 3689 overflow: // set remainder 3690 if (r != NULL) // to an impossible value, 3691 *r = 0x80000000; // and return the largest 3692 q = 0x80000000;} // possible neg. quotient. 3693 return q; 3694 } 3695 3696 3697 3698 /* This file contains a program for doing 64/64 ==> 64 division, on a 3699 machine that does not have that instruction but that does have 3700 instructions for "long division" (64/32 ==> 32). Code for unsigned 3701 division is given first, followed by a simple program for doing the 3702 signed version by using the unsigned version. 3703 These programs are useful in implementing "long long" (64-bit) 3704 arithmetic on a machine that has the long division instruction. It will 3705 work on 64- and 32-bit machines, provided the compiler implements long 3706 long's (64-bit integers). It is desirable that the machine have the 3707 Count Leading Zeros instruction. 3708 In the GNU world, these programs are known as __divdi3 and __udivdi3, 3709 and similar names are used here. 3710 This material is not in HD, but may be in a future edition. 3711 Max line length is 57, to fit in hacker.book. */ 3712 3713 3714 static Int nlz64(ULong x) 3715 { 3716 Int n; 3717 if (x == 0) return(64); 3718 n = 0; 3719 if (x <= 0x00000000FFFFFFFFULL) {n = n + 32; x = x << 32;} 3720 if (x <= 0x0000FFFFFFFFFFFFULL) {n = n + 16; x = x << 16;} 3721 if (x <= 0x00FFFFFFFFFFFFFFULL) {n = n + 8; x = x << 8;} 3722 if (x <= 0x0FFFFFFFFFFFFFFFULL) {n = n + 4; x = x << 4;} 3723 if (x <= 0x3FFFFFFFFFFFFFFFULL) {n = n + 2; x = x << 2;} 3724 if (x <= 0x7FFFFFFFFFFFFFFFULL) {n = n + 1;} 3725 return n; 3726 } 3727 3728 // ---------------------------- udivdi3 -------------------------------- 3729 3730 /* The variables u0, u1, etc. take on only 32-bit values, but they 3731 are declared long long to avoid some compiler warning messages and to 3732 avoid some unnecessary EXTRs that the compiler would put in, to 3733 convert long longs to ints. 3734 3735 First the procedure takes care of the case in which the divisor is a 3736 32-bit quantity. There are two subcases: (1) If the left half of the 3737 dividend is less than the divisor, one execution of DIVU is all that 3738 is required (overflow is not possible). (2) Otherwise it does two 3739 divisions, using the grade school method, with variables used as 3740 suggested below. 3741 3742 q1 q0 3743 ________ 3744 v) u1 u0 3745 q1*v 3746 ____ 3747 k u0 */ 3748 3749 /* These macros must be used with arguments of the appropriate type 3750 (unsigned long long for DIVU and long long for DIVS. They are 3751 simulations of the presumed machines ops. I.e., they look at only the 3752 low-order 32 bits of the divisor, they return garbage if the division 3753 overflows, and they return garbage in the high-order half of the 3754 quotient doubleword. 3755 In practice, these would be replaced with uses of the machine's DIVU 3756 and DIVS instructions (e.g., by using the GNU "asm" facility). */ 3757 3758 static UInt DIVU ( ULong u, UInt v ) 3759 { 3760 UInt uHi = (UInt)(u >> 32); 3761 UInt uLo = (UInt)u; 3762 return divlu2(uHi, uLo, v, NULL); 3763 } 3764 3765 static Int DIVS ( Long u, Int v ) 3766 { 3767 Int uHi = (Int)(u >> 32); 3768 UInt uLo = (UInt)u; 3769 return divls(uHi, uLo, v, NULL); 3770 } 3771 3772 /* 64 x 64 ==> 64 unsigned division, using only 32 x 32 ==> 32 3773 division as a primitive. */ 3774 static ULong udivdi3(ULong u, ULong v) 3775 { 3776 ULong u0, u1, v1, q0, q1, k, n; 3777 3778 if (v >> 32 == 0) { // If v < 2**32: 3779 if (u >> 32 < v) // If u/v cannot overflow, 3780 return DIVU(u, v) // just do one division. 3781 & 0xFFFFFFFF; 3782 else { // If u/v would overflow: 3783 u1 = u >> 32; // Break u up into two 3784 u0 = u & 0xFFFFFFFF; // halves. 3785 q1 = DIVU(u1, v) // First quotient digit. 3786 & 0xFFFFFFFF; 3787 k = u1 - q1*v; // First remainder, < v. 3788 q0 = DIVU((k << 32) + u0, v) // 2nd quot. digit. 3789 & 0xFFFFFFFF; 3790 return (q1 << 32) + q0; 3791 } 3792 } 3793 // Here v >= 2**32. 3794 n = nlz64(v); // 0 <= n <= 31. 3795 v1 = (v << n) >> 32; // Normalize the divisor 3796 // so its MSB is 1. 3797 u1 = u >> 1; // To ensure no overflow. 3798 q1 = DIVU(u1, v1) // Get quotient from 3799 & 0xFFFFFFFF; // divide unsigned insn. 3800 q0 = (q1 << n) >> 31; // Undo normalization and 3801 // division of u by 2. 3802 if (q0 != 0) // Make q0 correct or 3803 q0 = q0 - 1; // too small by 1. 3804 if ((u - q0*v) >= v) 3805 q0 = q0 + 1; // Now q0 is correct. 3806 return q0; 3807 } 3808 3809 3810 // ----------------------------- divdi3 -------------------------------- 3811 3812 /* This routine presumes that smallish cases (those which can be done in 3813 one execution of DIVS) are common. If this is not the case, the test for 3814 this case should be deleted. 3815 Note that the test for when DIVS can be used is not entirely 3816 accurate. For example, DIVS is not used if v = 0xFFFFFFFF8000000, 3817 whereas if could be (if u is sufficiently small in magnitude). */ 3818 3819 // ------------------------------ cut ---------------------------------- 3820 3821 static ULong my_llabs ( Long x ) 3822 { 3823 ULong t = x >> 63; 3824 return (x ^ t) - t; 3825 } 3826 3827 /* 64 x 64 ==> 64 signed division, using only 32 x 32 ==> 32 division 3828 as a primitive. */ 3829 static Long divdi3(Long u, Long v) 3830 { 3831 ULong au, av; 3832 Long q, t; 3833 au = my_llabs(u); 3834 av = my_llabs(v); 3835 if (av >> 31 == 0) { // If |v| < 2**31 and 3836 // if (v << 32 >> 32 == v) { // If v is in range and 3837 if (au < av << 31) { // |u|/|v| cannot 3838 q = DIVS(u, v); // overflow, use DIVS. 3839 return (q << 32) >> 32; 3840 } 3841 } 3842 q = udivdi3(au,av); // Invoke udivdi3. 3843 t = (u ^ v) >> 63; // If u, v have different 3844 return (q ^ t) - t; // signs, negate q. 3845 } 3846 3847 // ---------------------------- end cut -------------------------------- 3848 3849 ULong __udivdi3 (ULong u, ULong v); 3850 ULong __udivdi3 (ULong u, ULong v) 3851 { 3852 return udivdi3(u,v); 3853 } 3854 3855 Long __divdi3 (Long u, Long v); 3856 Long __divdi3 (Long u, Long v) 3857 { 3858 return divdi3(u,v); 3859 } 3860 3861 ULong __umoddi3 (ULong u, ULong v); 3862 ULong __umoddi3 (ULong u, ULong v) 3863 { 3864 ULong q = __udivdi3(u, v); 3865 ULong r = u - q * v; 3866 return r; 3867 } 3868 3869 Long __moddi3 (Long u, Long v); 3870 Long __moddi3 (Long u, Long v) 3871 { 3872 Long q = __divdi3(u, v); 3873 Long r = u - q * v; 3874 return r; 3875 } 3876 3877 /* ------------------------------------------------ 3878 ld_classic: Undefined symbols: 3879 ___fixunsdfdi 3880 ------------------------------------------------ 3881 */ 3882 3883 /* ===-- fixunsdfdi.c - Implement __fixunsdfdi -----------------------------=== 3884 * 3885 * The LLVM Compiler Infrastructure 3886 * 3887 * This file is dual licensed under the MIT and the University of Illinois Open 3888 * Source Licenses. See LICENSE.TXT for details. 3889 * 3890 * ===----------------------------------------------------------------------=== 3891 * 3892 * This file implements __fixunsdfdi for the compiler_rt library. 3893 * 3894 * ===----------------------------------------------------------------------=== 3895 */ 3896 3897 /* As per http://www.gnu.org/licenses/license-list.html#GPLCompatibleLicenses, 3898 3899 the "NCSA/University of Illinois Open Source License" is compatible 3900 with the GPL (both version 2 and 3). What is claimed to be 3901 compatible is this 3902 3903 http://www.opensource.org/licenses/UoI-NCSA.php 3904 3905 and the LLVM documentation at 3906 3907 http://www.llvm.org/docs/DeveloperPolicy.html#license 3908 3909 says all the code in LLVM is available under the University of 3910 Illinois/NCSA Open Source License, at this URL 3911 3912 http://www.opensource.org/licenses/UoI-NCSA.php 3913 3914 viz, the same one that the FSF pages claim is compatible. So I 3915 think it's OK to include it. 3916 */ 3917 3918 /* Returns: convert a to a unsigned long long, rounding toward zero. 3919 * Negative values all become zero. 3920 */ 3921 3922 /* Assumption: double is a IEEE 64 bit floating point type 3923 * du_int is a 64 bit integral type 3924 * value in double is representable in du_int or is negative 3925 * (no range checking performed) 3926 */ 3927 3928 /* seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm */ 3929 3930 typedef unsigned long long du_int; 3931 typedef unsigned su_int; 3932 3933 typedef union 3934 { 3935 du_int all; 3936 struct 3937 { 3938 #if VG_LITTLEENDIAN 3939 su_int low; 3940 su_int high; 3941 #else 3942 su_int high; 3943 su_int low; 3944 #endif /* VG_LITTLEENDIAN */ 3945 }s; 3946 } udwords; 3947 3948 typedef union 3949 { 3950 udwords u; 3951 double f; 3952 } double_bits; 3953 3954 du_int __fixunsdfdi(double a); 3955 3956 du_int 3957 __fixunsdfdi(double a) 3958 { 3959 double_bits fb; 3960 fb.f = a; 3961 int e = ((fb.u.s.high & 0x7FF00000) >> 20) - 1023; 3962 if (e < 0 || (fb.u.s.high & 0x80000000)) 3963 return 0; 3964 udwords r; 3965 r.s.high = (fb.u.s.high & 0x000FFFFF) | 0x00100000; 3966 r.s.low = fb.u.s.low; 3967 if (e > 52) 3968 r.all <<= (e - 52); 3969 else 3970 r.all >>= (52 - e); 3971 return r.all; 3972 } 3973 3974 3975 #endif 3976 3977 3978 /*====================================================================*/ 3979 /*=== Dummy _voucher_mach_msg_set for OSX 10.10 ===*/ 3980 /*====================================================================*/ 3981 3982 #if defined(VGO_darwin) && DARWIN_VERS >= DARWIN_10_10 3983 3984 /* Builds on MacOSX 10.10+ seem to need this for some reason. */ 3985 /* extern boolean_t voucher_mach_msg_set(mach_msg_header_t *msg) 3986 __attribute__((weak_import)); 3987 I haven't a clue what the return value means, so just return 0. 3988 Looks like none of the generated uses in the tree look at the 3989 return value anyway. 3990 */ 3991 UWord voucher_mach_msg_set ( UWord arg1 ); 3992 UWord voucher_mach_msg_set ( UWord arg1 ) 3993 { 3994 return 0; 3995 } 3996 3997 #endif 3998 3999 4000 /*--------------------------------------------------------------------*/ 4001 /*--- end ---*/ 4002 /*--------------------------------------------------------------------*/ 4003
