| |
| /*--------------------------------------------------------------------*/ |
| /*--- Startup: the real stuff m_main.c ---*/ |
| /*--------------------------------------------------------------------*/ |
| |
| /* |
| This file is part of Valgrind, a dynamic binary instrumentation |
| framework. |
| |
| Copyright (C) 2000-2009 Julian Seward |
| jseward@acm.org |
| |
| This program is free software; you can redistribute it and/or |
| modify it under the terms of the GNU General Public License as |
| published by the Free Software Foundation; either version 2 of the |
| License, or (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307, USA. |
| |
| The GNU General Public License is contained in the file COPYING. |
| */ |
| |
| #include "pub_core_basics.h" |
| #include "pub_core_vki.h" |
| #include "pub_core_vkiscnums.h" |
| #include "pub_core_threadstate.h" |
| #include "pub_core_xarray.h" |
| #include "pub_core_clientstate.h" |
| #include "pub_core_aspacemgr.h" |
| #include "pub_core_commandline.h" |
| #include "pub_core_debuglog.h" |
| #include "pub_core_errormgr.h" |
| #include "pub_core_execontext.h" |
| #include "pub_core_initimg.h" |
| #include "pub_core_libcbase.h" |
| #include "pub_core_libcassert.h" |
| #include "pub_core_libcfile.h" |
| #include "pub_core_libcprint.h" |
| #include "pub_core_libcproc.h" |
| #include "pub_core_libcsignal.h" |
| #include "pub_core_syscall.h" // VG_(strerror) |
| #include "pub_core_machine.h" |
| #include "pub_core_mallocfree.h" |
| #include "pub_core_options.h" |
| #include "pub_core_debuginfo.h" |
| #include "pub_core_redir.h" |
| #include "pub_core_scheduler.h" |
| #include "pub_core_signals.h" |
| #include "pub_core_stacks.h" // For VG_(register_stack) |
| #include "pub_core_syswrap.h" |
| #include "pub_core_tooliface.h" |
| #include "pub_core_translate.h" // For VG_(translate) |
| #include "pub_core_trampoline.h" |
| #include "pub_core_transtab.h" |
| |
| /* Stuff for reading AIX5 /proc/<pid>/sysent files */ |
| #if defined(VGO_aix5) |
| /* --- !!! --- EXTERNAL HEADERS start --- !!! --- */ |
| # include <sys/procfs.h> /* prsysent_t */ |
| /* --- !!! --- EXTERNAL HEADERS end --- !!! --- */ |
| # define VG_AIX5_SYSENT_SIZE 100000 |
| static UChar aix5_sysent_buf[VG_AIX5_SYSENT_SIZE]; |
| #endif |
| |
| |
| /*====================================================================*/ |
| /*=== Counters, for profiling purposes only ===*/ |
| /*====================================================================*/ |
| |
| static void print_all_stats ( void ) |
| { |
| VG_(print_translation_stats)(); |
| VG_(print_tt_tc_stats)(); |
| VG_(print_scheduler_stats)(); |
| VG_(print_ExeContext_stats)(); |
| VG_(print_errormgr_stats)(); |
| |
| // Memory stats |
| if (VG_(clo_verbosity) > 2) { |
| VG_(message)(Vg_DebugMsg, ""); |
| VG_(message)(Vg_DebugMsg, |
| "------ Valgrind's internal memory use stats follow ------" ); |
| VG_(sanity_check_malloc_all)(); |
| VG_(message)(Vg_DebugMsg, "------" ); |
| VG_(print_all_arena_stats)(); |
| VG_(message)(Vg_DebugMsg, ""); |
| } |
| } |
| |
| |
| /*====================================================================*/ |
| /*=== Command-line: variables, processing, etc ===*/ |
| /*====================================================================*/ |
| |
| // See pub_{core,tool}_options.h for explanations of all these. |
| |
| static void usage_NORETURN ( Bool debug_help ) |
| { |
| /* 'usage1' contains a %s for the name of the GDB executable, which |
| must be supplied when it is VG_(printf)'d. */ |
| Char* usage1 = |
| "usage: valgrind [options] prog-and-args\n" |
| "\n" |
| " common user options for all Valgrind tools, with defaults in [ ]:\n" |
| " --tool=<name> use the Valgrind tool named <name> [memcheck]\n" |
| " -h --help show this message\n" |
| " --help-debug show this message, plus debugging options\n" |
| " --version show version\n" |
| " -q --quiet run silently; only print error msgs\n" |
| " -v --verbose be more verbose, incl counts of errors\n" |
| " --trace-children=no|yes Valgrind-ise child processes (follow execve)? [no]\n" |
| " --child-silent-after-fork=no|yes omit child output between fork & exec? [no]\n" |
| " --track-fds=no|yes track open file descriptors? [no]\n" |
| " --time-stamp=no|yes add timestamps to log messages? [no]\n" |
| " --log-fd=<number> log messages to file descriptor [2=stderr]\n" |
| " --log-file=<file> log messages to <file>\n" |
| " --log-socket=ipaddr:port log messages to socket ipaddr:port\n" |
| "\n" |
| " uncommon user options for all Valgrind tools:\n" |
| " --run-libc-freeres=no|yes free up glibc memory at exit? [yes]\n" |
| " --sim-hints=hint1,hint2,... known hints:\n" |
| " lax-ioctls, enable-outer [none]\n" |
| " --show-emwarns=no|yes show warnings about emulation limits? [no]\n" |
| " --smc-check=none|stack|all checks for self-modifying code: none,\n" |
| " only for code found in stacks, or all [stack]\n" |
| " --kernel-variant=variant1,variant2,... known variants: bproc [none]\n" |
| " handle non-standard kernel variants\n" |
| " --read-var-info=yes|no read debug info on stack and global variables\n" |
| " and use it to print better error messages in\n" |
| " tools that make use of it (Memcheck, Helgrind)\n" |
| "\n" |
| " user options for Valgrind tools that report errors:\n" |
| " --xml=yes all output is in XML (some tools only)\n" |
| " --xml-user-comment=STR copy STR verbatim to XML output\n" |
| " --demangle=no|yes automatically demangle C++ names? [yes]\n" |
| " --num-callers=<number> show <number> callers in stack traces [12]\n" |
| " --error-limit=no|yes stop showing new errors if too many? [yes]\n" |
| " --error-exitcode=<number> exit code to return if errors found [0=disable]\n" |
| " --show-below-main=no|yes continue stack traces below main() [no]\n" |
| " --suppressions=<filename> suppress errors described in <filename>\n" |
| " --gen-suppressions=no|yes|all print suppressions for errors? [no]\n" |
| " --db-attach=no|yes start debugger when errors detected? [no]\n" |
| " --db-command=<command> command to start debugger [%s -nw %%f %%p]\n" |
| " --input-fd=<number> file descriptor for input [0=stdin]\n" |
| " --max-stackframe=<number> assume stack switch for SP changes larger\n" |
| " than <number> bytes [2000000]\n" |
| " --main-stacksize=<number> set size of main thread's stack (in bytes)\n" |
| " [use current 'ulimit' value]\n" |
| "\n"; |
| |
| Char* usage2 = |
| "\n" |
| " debugging options for all Valgrind tools:\n" |
| " --sanity-level=<number> level of sanity checking to do [1]\n" |
| " --trace-flags=<XXXXXXXX> show generated code? (X = 0|1) [00000000]\n" |
| " --profile-flags=<XXXXXXXX> ditto, but for profiling (X = 0|1) [00000000]\n" |
| " --trace-notbelow=<number> only show BBs above <number> [999999999]\n" |
| " --trace-syscalls=no|yes show all system calls? [no]\n" |
| " --trace-signals=no|yes show signal handling details? [no]\n" |
| " --trace-symtab=no|yes show symbol table details? [no]\n" |
| " --trace-symtab-patt=<patt> limit debuginfo tracing to obj name <patt>\n" |
| " --trace-cfi=no|yes show call-frame-info details? [no]\n" |
| " --debug-dump=syms mimic /usr/bin/readelf --syms\n" |
| " --debug-dump=line mimic /usr/bin/readelf --debug-dump=line\n" |
| " --debug-dump=frames mimic /usr/bin/readelf --debug-dump=frames\n" |
| " --trace-redir=no|yes show redirection details? [no]\n" |
| " --trace-sched=no|yes show thread scheduler details? [no]\n" |
| " --profile-heap=no|yes profile Valgrind's own space use\n" |
| " --wait-for-gdb=yes|no pause on startup to wait for gdb attach\n" |
| " --sym-offsets=yes|no show syms in form 'name+offset' ? [no]\n" |
| " --command-line-only=no|yes only use command line options [no]\n" |
| "\n" |
| " --vex-iropt-verbosity 0 .. 9 [0]\n" |
| " --vex-iropt-level 0 .. 2 [2]\n" |
| " --vex-iropt-precise-memory-exns [no]\n" |
| " --vex-iropt-unroll-thresh 0 .. 400 [120]\n" |
| " --vex-guest-max-insns 1 .. 100 [50]\n" |
| " --vex-guest-chase-thresh 0 .. 99 [10]\n" |
| "\n" |
| " --trace-flags and --profile-flags values (omit the middle space):\n" |
| " 1000 0000 show conversion into IR\n" |
| " 0100 0000 show after initial opt\n" |
| " 0010 0000 show after instrumentation\n" |
| " 0001 0000 show after second opt\n" |
| " 0000 1000 show after tree building\n" |
| " 0000 0100 show selecting insns\n" |
| " 0000 0010 show after reg-alloc\n" |
| " 0000 0001 show final assembly\n" |
| " (Nb: you need --trace-notbelow with --trace-flags for full details)\n" |
| "\n" |
| " debugging options for Valgrind tools that report errors\n" |
| " --dump-error=<number> show translation for basic block associated\n" |
| " with <number>'th error context [0=show none]\n" |
| "\n"; |
| |
| Char* usage3 = |
| "\n" |
| " Extra options read from ~/.valgrindrc, $VALGRIND_OPTS, ./.valgrindrc\n" |
| "\n" |
| " Valgrind is Copyright (C) 2000-2009 Julian Seward et al.\n" |
| " and licensed under the GNU General Public License, version 2.\n" |
| " Bug reports, feedback, admiration, abuse, etc, to: %s.\n" |
| "\n" |
| " Tools are copyright and licensed by their authors. See each\n" |
| " tool's start-up message for more information.\n" |
| "\n"; |
| |
| Char* gdb_path = GDB_PATH; |
| |
| // Ensure the message goes to stdout |
| VG_(clo_log_fd) = 1; |
| vg_assert( !VG_(logging_to_socket) ); |
| |
| /* 'usage1' expects one char* argument */ |
| VG_(printf)(usage1, gdb_path); |
| if (VG_(details).name) { |
| VG_(printf)(" user options for %s:\n", VG_(details).name); |
| if (VG_(needs).command_line_options) |
| VG_TDICT_CALL(tool_print_usage); |
| else |
| VG_(printf)(" (none)\n"); |
| } |
| if (debug_help) { |
| VG_(printf)("%s", usage2); |
| |
| if (VG_(details).name) { |
| VG_(printf)(" debugging options for %s:\n", VG_(details).name); |
| |
| if (VG_(needs).command_line_options) |
| VG_TDICT_CALL(tool_print_debug_usage); |
| else |
| VG_(printf)(" (none)\n"); |
| } |
| } |
| VG_(printf)(usage3, VG_BUGS_TO); |
| VG_(exit)(0); |
| } |
| |
| |
| /* Peer at previously set up VG_(args_for_valgrind) and do some |
| minimal command line processing that must happen early on: |
| |
| - show the version string, if requested (-v) |
| - extract any request for help (--help, -h, --help-debug) |
| - get the toolname (--tool=) |
| - set VG_(clo_max_stackframe) (--max-stackframe=) |
| - set VG_(clo_main_stacksize) (--main-stacksize=) |
| |
| That's all it does. The main command line processing is done below |
| by main_process_cmd_line_options. Note that |
| main_process_cmd_line_options has to handle but ignore the ones we |
| have handled here. |
| */ |
| static void early_process_cmd_line_options ( /*OUT*/Int* need_help, |
| /*OUT*/HChar** tool ) |
| { |
| UInt i; |
| HChar* str; |
| |
| vg_assert( VG_(args_for_valgrind) ); |
| |
| /* parse the options we have (only the options we care about now) */ |
| for (i = 0; i < VG_(sizeXA)( VG_(args_for_valgrind) ); i++) { |
| |
| str = * (HChar**) VG_(indexXA)( VG_(args_for_valgrind), i ); |
| vg_assert(str); |
| |
| // Nb: the version string goes to stdout. |
| if VG_XACT_CLO(str, "--version", VG_(clo_log_fd), 1) { |
| VG_(printf)("valgrind-" VERSION "\n"); |
| VG_(exit)(0); |
| } |
| else if VG_XACT_CLO(str, "--help", *need_help, 1) {} |
| else if VG_XACT_CLO(str, "-h", *need_help, 1) {} |
| |
| else if VG_XACT_CLO(str, "--help-debug", *need_help, 2) {} |
| |
| // The tool has already been determined, but we need to know the name |
| // here. |
| else if VG_STR_CLO(str, "--tool", *tool) {} |
| |
| // Set up VG_(clo_max_stackframe) and VG_(clo_main_stacksize). |
| // These are needed by VG_(ii_create_image), which happens |
| // before main_process_cmd_line_options(). |
| else if VG_INT_CLO(str, "--max-stackframe", VG_(clo_max_stackframe)) {} |
| else if VG_INT_CLO(str, "--main-stacksize", VG_(clo_main_stacksize)) {} |
| } |
| } |
| |
| /* The main processing for command line options. See comments above |
| on early_process_cmd_line_options. |
| */ |
| static Bool main_process_cmd_line_options( const HChar* toolname ) |
| { |
| // VG_(clo_log_fd) is used by all the messaging. It starts as 2 (stderr) |
| // and we cannot change it until we know what we are changing it to is |
| // ok. So we have tmp_log_fd to hold the tmp fd prior to that point. |
| SysRes sres; |
| Int i, tmp_log_fd; |
| Int toolname_len = VG_(strlen)(toolname); |
| Char* tmp_str; // Used in a couple of places. |
| enum { |
| VgLogTo_Fd, |
| VgLogTo_File, |
| VgLogTo_Socket |
| } log_to = VgLogTo_Fd; // Where is logging output to be sent? |
| |
| /* log to stderr by default, but usage message goes to stdout */ |
| tmp_log_fd = 2; |
| |
| /* Check for sane path in ./configure --prefix=... */ |
| if (VG_LIBDIR[0] != '/') |
| VG_(err_config_error)("Please use absolute paths in " |
| "./configure --prefix=... or --libdir=..."); |
| |
| vg_assert( VG_(args_for_valgrind) ); |
| |
| for (i = 0; i < VG_(sizeXA)( VG_(args_for_valgrind) ); i++) { |
| |
| HChar* arg = * (HChar**) VG_(indexXA)( VG_(args_for_valgrind), i ); |
| HChar* colon = arg; |
| |
| // Look for a colon in the option name. |
| while (*colon && *colon != ':' && *colon != '=') |
| colon++; |
| |
| // Does it have the form "--toolname:foo"? We have to do it at the start |
| // in case someone has combined a prefix with a core-specific option, |
| // eg. "--memcheck:verbose". |
| if (*colon == ':') { |
| if (VG_STREQN(2, arg, "--") && |
| VG_STREQN(toolname_len, arg+2, toolname) && |
| VG_STREQN(1, arg+2+toolname_len, ":")) |
| { |
| // Prefix matches, convert "--toolname:foo" to "--foo". |
| // Two things to note: |
| // - We cannot modify the option in-place. If we did, and then |
| // a child was spawned with --trace-children=yes, the |
| // now-non-prefixed option would be passed and could screw up |
| // the child. |
| // - We create copies, and never free them. Why? Non-prefixed |
| // options hang around forever, so tools need not make copies |
| // of strings within them. We need to have the same behaviour |
| // for prefixed options. The pointer to the copy will be lost |
| // once we leave this function (although a tool may keep a |
| // pointer into it), but the space wasted is insignificant. |
| // (In bug #142197, the copies were being freed, which caused |
| // problems for tools that reasonably assumed that arguments |
| // wouldn't disappear on them.) |
| if (0) |
| VG_(printf)("tool-specific arg: %s\n", arg); |
| arg = VG_(strdup)("main.mpclo.1", arg + toolname_len + 1); |
| arg[0] = '-'; |
| arg[1] = '-'; |
| |
| } else { |
| // prefix doesn't match, skip to next arg |
| continue; |
| } |
| } |
| |
| /* Ignore these options - they've already been handled */ |
| if VG_STREQN( 7, arg, "--tool=") {} |
| else if VG_STREQN(20, arg, "--command-line-only=") {} |
| else if VG_STREQ( arg, "--") {} |
| else if VG_STREQ( arg, "-d") {} |
| else if VG_STREQN(16, arg, "--max-stackframe") {} |
| else if VG_STREQN(16, arg, "--main-stacksize") {} |
| else if VG_STREQN(14, arg, "--profile-heap") {} |
| |
| // These options are new. |
| else if (VG_STREQ(arg, "-v") || |
| VG_STREQ(arg, "--verbose")) |
| VG_(clo_verbosity)++; |
| |
| else if (VG_STREQ(arg, "-q") || |
| VG_STREQ(arg, "--quiet")) |
| VG_(clo_verbosity)--; |
| |
| else if VG_BOOL_CLO(arg, "--xml", VG_(clo_xml)) {} |
| else if VG_BOOL_CLO(arg, "--db-attach", VG_(clo_db_attach)) {} |
| else if VG_BOOL_CLO(arg, "--demangle", VG_(clo_demangle)) {} |
| else if VG_BOOL_CLO(arg, "--error-limit", VG_(clo_error_limit)) {} |
| else if VG_INT_CLO (arg, "--error-exitcode", VG_(clo_error_exitcode)) {} |
| else if VG_BOOL_CLO(arg, "--show-emwarns", VG_(clo_show_emwarns)) {} |
| |
| else if VG_BOOL_CLO(arg, "--run-libc-freeres", VG_(clo_run_libc_freeres)) {} |
| else if VG_BOOL_CLO(arg, "--show-below-main", VG_(clo_show_below_main)) {} |
| else if VG_BOOL_CLO(arg, "--time-stamp", VG_(clo_time_stamp)) {} |
| else if VG_BOOL_CLO(arg, "--track-fds", VG_(clo_track_fds)) {} |
| else if VG_BOOL_CLO(arg, "--trace-children", VG_(clo_trace_children)) {} |
| else if VG_BOOL_CLO(arg, "--child-silent-after-fork", |
| VG_(clo_child_silent_after_fork)) {} |
| else if VG_BOOL_CLO(arg, "--trace-sched", VG_(clo_trace_sched)) {} |
| else if VG_BOOL_CLO(arg, "--trace-signals", VG_(clo_trace_signals)) {} |
| else if VG_BOOL_CLO(arg, "--trace-symtab", VG_(clo_trace_symtab)) {} |
| else if VG_STR_CLO (arg, "--trace-symtab-patt", VG_(clo_trace_symtab_patt)) {} |
| else if VG_BOOL_CLO(arg, "--trace-cfi", VG_(clo_trace_cfi)) {} |
| else if VG_XACT_CLO(arg, "--debug-dump=syms", VG_(clo_debug_dump_syms), |
| True) {} |
| else if VG_XACT_CLO(arg, "--debug-dump=line", VG_(clo_debug_dump_line), |
| True) {} |
| else if VG_XACT_CLO(arg, "--debug-dump=frames", |
| VG_(clo_debug_dump_frames), True) {} |
| else if VG_BOOL_CLO(arg, "--trace-redir", VG_(clo_trace_redir)) {} |
| |
| else if VG_BOOL_CLO(arg, "--trace-syscalls", VG_(clo_trace_syscalls)) {} |
| else if VG_BOOL_CLO(arg, "--wait-for-gdb", VG_(clo_wait_for_gdb)) {} |
| else if VG_STR_CLO (arg, "--db-command", VG_(clo_db_command)) {} |
| else if VG_STR_CLO (arg, "--sim-hints", VG_(clo_sim_hints)) {} |
| else if VG_BOOL_CLO(arg, "--sym-offsets", VG_(clo_sym_offsets)) {} |
| else if VG_BOOL_CLO(arg, "--read-var-info", VG_(clo_read_var_info)) {} |
| |
| else if VG_INT_CLO (arg, "--dump-error", VG_(clo_dump_error)) {} |
| else if VG_INT_CLO (arg, "--input-fd", VG_(clo_input_fd)) {} |
| else if VG_INT_CLO (arg, "--sanity-level", VG_(clo_sanity_level)) {} |
| else if VG_BINT_CLO(arg, "--num-callers", VG_(clo_backtrace_size), 1, |
| VG_DEEPEST_BACKTRACE) {} |
| |
| else if VG_XACT_CLO(arg, "--smc-check=none", VG_(clo_smc_check), |
| Vg_SmcNone); |
| else if VG_XACT_CLO(arg, "--smc-check=stack", VG_(clo_smc_check), |
| Vg_SmcStack); |
| else if VG_XACT_CLO(arg, "--smc-check=all", VG_(clo_smc_check), |
| Vg_SmcAll); |
| |
| else if VG_STR_CLO (arg, "--kernel-variant", VG_(clo_kernel_variant)) {} |
| |
| else if VG_BINT_CLO(arg, "--vex-iropt-verbosity", |
| VG_(clo_vex_control).iropt_verbosity, 0, 10) {} |
| else if VG_BINT_CLO(arg, "--vex-iropt-level", |
| VG_(clo_vex_control).iropt_level, 0, 2) {} |
| else if VG_BOOL_CLO(arg, "--vex-iropt-precise-memory-exns", |
| VG_(clo_vex_control).iropt_precise_memory_exns) {} |
| else if VG_BINT_CLO(arg, "--vex-iropt-unroll-thresh", |
| VG_(clo_vex_control).iropt_unroll_thresh, 0, 400) {} |
| else if VG_BINT_CLO(arg, "--vex-guest-max-insns", |
| VG_(clo_vex_control).guest_max_insns, 1, 100) {} |
| else if VG_BINT_CLO(arg, "--vex-guest-chase-thresh", |
| VG_(clo_vex_control).guest_chase_thresh, 0, 99) {} |
| |
| else if VG_INT_CLO(arg, "--log-fd", tmp_log_fd) { |
| log_to = VgLogTo_Fd; |
| VG_(clo_log_name) = NULL; |
| } |
| |
| else if VG_STR_CLO(arg, "--log-file", VG_(clo_log_name)) { |
| log_to = VgLogTo_File; |
| } |
| |
| else if VG_STR_CLO(arg, "--log-socket", VG_(clo_log_name)) { |
| log_to = VgLogTo_Socket; |
| } |
| |
| else if VG_STR_CLO(arg, "--xml-user-comment", |
| VG_(clo_xml_user_comment)) {} |
| |
| else if VG_STR_CLO(arg, "--suppressions", tmp_str) { |
| if (VG_(clo_n_suppressions) >= VG_CLO_MAX_SFILES) { |
| VG_(message)(Vg_UserMsg, "Too many suppression files specified."); |
| VG_(message)(Vg_UserMsg, |
| "Increase VG_CLO_MAX_SFILES and recompile."); |
| VG_(err_bad_option)(arg); |
| } |
| VG_(clo_suppressions)[VG_(clo_n_suppressions)] = tmp_str; |
| VG_(clo_n_suppressions)++; |
| } |
| |
| /* "stuvwxyz" --> stuvwxyz (binary) */ |
| else if VG_STR_CLO(arg, "--trace-flags", tmp_str) { |
| Int j; |
| |
| if (8 != VG_(strlen)(tmp_str)) { |
| VG_(message)(Vg_UserMsg, |
| "--trace-flags argument must have 8 digits"); |
| VG_(err_bad_option)(arg); |
| } |
| for (j = 0; j < 8; j++) { |
| if ('0' == tmp_str[j]) { /* do nothing */ } |
| else if ('1' == tmp_str[j]) VG_(clo_trace_flags) |= (1 << (7-j)); |
| else { |
| VG_(message)(Vg_UserMsg, "--trace-flags argument can only " |
| "contain 0s and 1s"); |
| VG_(err_bad_option)(arg); |
| } |
| } |
| } |
| |
| /* "stuvwxyz" --> stuvwxyz (binary) */ |
| else if VG_STR_CLO(arg, "--profile-flags", tmp_str) { |
| Int j; |
| |
| if (8 != VG_(strlen)(tmp_str)) { |
| VG_(message)(Vg_UserMsg, |
| "--profile-flags argument must have 8 digits"); |
| VG_(err_bad_option)(arg); |
| } |
| for (j = 0; j < 8; j++) { |
| if ('0' == tmp_str[j]) { /* do nothing */ } |
| else if ('1' == tmp_str[j]) VG_(clo_profile_flags) |= (1 << (7-j)); |
| else { |
| VG_(message)(Vg_UserMsg, "--profile-flags argument can only " |
| "contain 0s and 1s"); |
| VG_(err_bad_option)(arg); |
| } |
| } |
| } |
| |
| else if VG_INT_CLO (arg, "--trace-notbelow", VG_(clo_trace_notbelow)) {} |
| |
| else if VG_XACT_CLO(arg, "--gen-suppressions=no", |
| VG_(clo_gen_suppressions), 0) {} |
| else if VG_XACT_CLO(arg, "--gen-suppressions=yes", |
| VG_(clo_gen_suppressions), 1) {} |
| else if VG_XACT_CLO(arg, "--gen-suppressions=all", |
| VG_(clo_gen_suppressions), 2) {} |
| |
| else if ( ! VG_(needs).command_line_options |
| || ! VG_TDICT_CALL(tool_process_cmd_line_option, arg) ) { |
| VG_(err_bad_option)(arg); |
| } |
| } |
| |
| /* Make VEX control parameters sane */ |
| |
| if (VG_(clo_vex_control).guest_chase_thresh |
| >= VG_(clo_vex_control).guest_max_insns) |
| VG_(clo_vex_control).guest_chase_thresh |
| = VG_(clo_vex_control).guest_max_insns - 1; |
| |
| if (VG_(clo_vex_control).guest_chase_thresh < 0) |
| VG_(clo_vex_control).guest_chase_thresh = 0; |
| |
| /* Check various option values */ |
| |
| if (VG_(clo_verbosity) < 0) |
| VG_(clo_verbosity) = 0; |
| |
| if (VG_(clo_gen_suppressions) > 0 && |
| !VG_(needs).core_errors && !VG_(needs).tool_errors) { |
| VG_(message)(Vg_UserMsg, |
| "Can't use --gen-suppressions= with this tool,"); |
| VG_(message)(Vg_UserMsg, |
| "as it doesn't generate errors."); |
| VG_(err_bad_option)("--gen-suppressions="); |
| } |
| |
| /* If we've been asked to emit XML, mash around various other |
| options so as to constrain the output somewhat, and to remove |
| any need for user input during the run. */ |
| if (VG_(clo_xml)) { |
| /* Disable suppression generation (requires user input) */ |
| VG_(clo_gen_suppressions) = 0; |
| /* Disable attaching to GDB (requires user input) */ |
| VG_(clo_db_attach) = False; |
| /* Set a known verbosity level */ |
| VG_(clo_verbosity) = 1; |
| /* Disable error limits (this might be a bad idea!) */ |
| VG_(clo_error_limit) = False; |
| /* Disable emulation warnings */ |
| VG_(clo_show_emwarns) = False; |
| /* Disable waiting for GDB to debug Valgrind */ |
| VG_(clo_wait_for_gdb) = False; |
| /* No file-descriptor leak checking yet */ |
| VG_(clo_track_fds) = False; |
| /* Disable timestamped output */ |
| VG_(clo_time_stamp) = False; |
| /* Disable heap profiling, since that prints lots of stuff. */ |
| VG_(clo_profile_heap) = False; |
| /* Also, we want to set options for the leak checker, but that |
| will have to be done in Memcheck's flag-handling code, not |
| here. */ |
| } |
| |
| /* All non-logging-related options have been checked. If the logging |
| option specified is ok, we can switch to it, as we know we won't |
| have to generate any other command-line-related error messages. |
| (So far we should be still attached to stderr, so we can show on |
| the terminal any problems to do with processing command line |
| opts.) |
| |
| So set up logging now. After this is done, VG_(clo_log_fd) |
| should be connected to whatever sink has been selected, and we |
| indiscriminately chuck stuff into it without worrying what the |
| nature of it is. Oh the wonder of Unix streams. */ |
| |
| vg_assert(VG_(clo_log_fd) == 2 /* stderr */); |
| vg_assert(VG_(logging_to_socket) == False); |
| |
| switch (log_to) { |
| |
| case VgLogTo_Fd: |
| vg_assert(VG_(clo_log_name) == NULL); |
| break; |
| |
| case VgLogTo_File: { |
| Char* logfilename; |
| |
| vg_assert(VG_(clo_log_name) != NULL); |
| vg_assert(VG_(strlen)(VG_(clo_log_name)) <= 900); /* paranoia */ |
| |
| // Nb: we overwrite an existing file of this name without asking |
| // any questions. |
| logfilename = VG_(expand_file_name)("--log-file", VG_(clo_log_name)); |
| sres = VG_(open)(logfilename, |
| VKI_O_CREAT|VKI_O_WRONLY|VKI_O_TRUNC, |
| VKI_S_IRUSR|VKI_S_IWUSR); |
| if (!sres.isError) { |
| tmp_log_fd = sres.res; |
| } else { |
| VG_(message)(Vg_UserMsg, |
| "Can't create log file '%s' (%s); giving up!", |
| logfilename, VG_(strerror)(sres.err)); |
| VG_(err_bad_option)( |
| "--log-file=<file> (didn't work out for some reason.)"); |
| /*NOTREACHED*/ |
| } |
| break; /* switch (VG_(clo_log_to)) */ |
| } |
| |
| case VgLogTo_Socket: { |
| vg_assert(VG_(clo_log_name) != NULL); |
| vg_assert(VG_(strlen)(VG_(clo_log_name)) <= 900); /* paranoia */ |
| tmp_log_fd = VG_(connect_via_socket)( VG_(clo_log_name) ); |
| if (tmp_log_fd == -1) { |
| VG_(message)(Vg_UserMsg, |
| "Invalid --log-socket=ipaddr or --log-socket=ipaddr:port spec"); |
| VG_(message)(Vg_UserMsg, |
| "of '%s'; giving up!", VG_(clo_log_name) ); |
| VG_(err_bad_option)( |
| "--log-socket="); |
| /*NOTREACHED*/ |
| } |
| if (tmp_log_fd == -2) { |
| VG_(message)(Vg_UserMsg, |
| "valgrind: failed to connect to logging server '%s'.", |
| VG_(clo_log_name) ); |
| VG_(message)(Vg_UserMsg, |
| "Log messages will sent to stderr instead." ); |
| VG_(message)(Vg_UserMsg, |
| "" ); |
| /* We don't change anything here. */ |
| vg_assert(VG_(clo_log_fd) == 2); |
| tmp_log_fd = 2; |
| } else { |
| vg_assert(tmp_log_fd > 0); |
| VG_(logging_to_socket) = True; |
| } |
| break; |
| } |
| } |
| |
| |
| /* Check that the requested tool actually supports XML output. */ |
| if (VG_(clo_xml) && !VG_(needs).xml_output) { |
| VG_(clo_xml) = False; |
| VG_(message)(Vg_UserMsg, |
| "%s does not support XML output.", VG_(details).name); |
| VG_(err_bad_option)("--xml=yes"); |
| /*NOTREACHED*/ |
| } |
| |
| if (tmp_log_fd >= 0) { |
| // Move log_fd into the safe range, so it doesn't conflict with any app fds. |
| tmp_log_fd = VG_(fcntl)(tmp_log_fd, VKI_F_DUPFD, VG_(fd_hard_limit)); |
| if (tmp_log_fd < 0) { |
| VG_(message)(Vg_UserMsg, "valgrind: failed to move logfile fd into safe range, using stderr"); |
| VG_(clo_log_fd) = 2; // stderr |
| } else { |
| VG_(clo_log_fd) = tmp_log_fd; |
| VG_(fcntl)(VG_(clo_log_fd), VKI_F_SETFD, VKI_FD_CLOEXEC); |
| } |
| } else { |
| // If they said --log-fd=-1, don't print anything. Plausible for use in |
| // regression testing suites that use client requests to count errors. |
| VG_(clo_log_fd) = tmp_log_fd; |
| } |
| |
| if (VG_(clo_n_suppressions) < VG_CLO_MAX_SFILES-1 && |
| (VG_(needs).core_errors || VG_(needs).tool_errors)) { |
| /* If we haven't reached the max number of suppressions, load |
| the default one. */ |
| static const Char default_supp[] = "default.supp"; |
| Int len = VG_(strlen)(VG_(libdir)) + 1 + sizeof(default_supp); |
| Char *buf = VG_(arena_malloc)(VG_AR_CORE, "main.mpclo.2", len); |
| VG_(sprintf)(buf, "%s/%s", VG_(libdir), default_supp); |
| VG_(clo_suppressions)[VG_(clo_n_suppressions)] = buf; |
| VG_(clo_n_suppressions)++; |
| } |
| |
| return (log_to == VgLogTo_Fd); |
| } |
| |
| // Write the name and value of log file qualifiers to the xml file. |
| static void print_file_vars(Char* format) |
| { |
| Int i = 0; |
| |
| while (format[i]) { |
| if (format[i] == '%') { |
| // We saw a '%'. What's next... |
| i++; |
| if ('q' == format[i]) { |
| i++; |
| if ('{' == format[i]) { |
| // Get the env var name, print its contents. |
| Char* qualname; |
| Char* qual; |
| i++; |
| qualname = &format[i]; |
| while (True) { |
| if ('}' == format[i]) { |
| // Temporarily replace the '}' with NUL to extract var |
| // name. |
| format[i] = 0; |
| qual = VG_(getenv)(qualname); |
| break; |
| } |
| i++; |
| } |
| |
| VG_(message_no_f_c)(Vg_UserMsg, |
| "<logfilequalifier> <var>%t</var> " |
| "<value>%t</value> </logfilequalifier>", |
| qualname,qual); |
| format[i] = '}'; |
| i++; |
| } |
| } |
| } else { |
| i++; |
| } |
| } |
| } |
| |
| |
| /*====================================================================*/ |
| /*=== Printing the preamble ===*/ |
| /*====================================================================*/ |
| |
| /* Ok, the logging sink is running now. Print a suitable preamble. |
| If logging to file or a socket, write details of parent PID and |
| command line args, to help people trying to interpret the |
| results of a run which encompasses multiple processes. */ |
| static void print_preamble(Bool logging_to_fd, const char* toolname) |
| { |
| HChar* xpre = VG_(clo_xml) ? " <line>" : ""; |
| HChar* xpost = VG_(clo_xml) ? "</line>" : ""; |
| Int i; |
| |
| vg_assert( VG_(args_for_client) ); |
| vg_assert( VG_(args_for_valgrind) ); |
| vg_assert( toolname ); |
| |
| if (VG_(clo_xml)) { |
| VG_(message)(Vg_UserMsg, "<?xml version=\"1.0\"?>"); |
| VG_(message)(Vg_UserMsg, ""); |
| VG_(message)(Vg_UserMsg, "<valgrindoutput>"); |
| VG_(message)(Vg_UserMsg, ""); |
| VG_(message)(Vg_UserMsg, "<protocolversion>3</protocolversion>"); |
| VG_(message)(Vg_UserMsg, ""); |
| } |
| |
| if (VG_(clo_verbosity > 0)) { |
| |
| if (VG_(clo_xml)) |
| VG_(message)(Vg_UserMsg, "<preamble>"); |
| |
| /* Tool details */ |
| VG_(message)(Vg_UserMsg, "%s%s%s%s, %s.%s", |
| xpre, |
| VG_(details).name, |
| NULL == VG_(details).version ? "" : "-", |
| NULL == VG_(details).version |
| ? (Char*)"" : VG_(details).version, |
| VG_(details).description, |
| xpost); |
| |
| if (VG_(strlen)(toolname) >= 4 |
| && 0 == VG_(strncmp)(toolname, "exp-", 4)) { |
| VG_(message)( |
| Vg_UserMsg, |
| "%sNOTE: This is an Experimental-Class Valgrind Tool.%s", |
| xpre, xpost |
| ); |
| } |
| |
| VG_(message)(Vg_UserMsg, "%s%s%s", |
| xpre, VG_(details).copyright_author, xpost); |
| |
| /* Core details */ |
| VG_(message)(Vg_UserMsg, |
| "%sUsing LibVEX rev %s, a library for dynamic binary translation.%s", |
| xpre, LibVEX_Version(), xpost ); |
| VG_(message)(Vg_UserMsg, |
| "%sCopyright (C) 2004-2009, and GNU GPL'd, by OpenWorks LLP.%s", |
| xpre, xpost ); |
| VG_(message)(Vg_UserMsg, |
| "%sUsing valgrind-%s, a dynamic binary instrumentation framework.%s", |
| xpre, VERSION, xpost); |
| VG_(message)(Vg_UserMsg, |
| "%sCopyright (C) 2000-2009, and GNU GPL'd, by Julian Seward et al.%s", |
| xpre, xpost ); |
| |
| if (VG_(clo_verbosity) == 1 && !VG_(clo_xml)) |
| VG_(message)(Vg_UserMsg, "For more details, rerun with: -v"); |
| |
| if (VG_(clo_xml)) |
| VG_(message)(Vg_UserMsg, "</preamble>"); |
| } |
| |
| if (!VG_(clo_xml) && VG_(clo_verbosity) > 0 && !logging_to_fd) { |
| VG_(message)(Vg_UserMsg, ""); |
| VG_(message)(Vg_UserMsg, |
| "My PID = %d, parent PID = %d. Prog and args are:", |
| VG_(getpid)(), VG_(getppid)() ); |
| if (VG_(args_the_exename)) |
| VG_(message)(Vg_UserMsg, " %s", VG_(args_the_exename)); |
| for (i = 0; i < VG_(sizeXA)( VG_(args_for_client) ); i++) |
| VG_(message)(Vg_UserMsg, |
| " %s", |
| * (HChar**) VG_(indexXA)( VG_(args_for_client), i )); |
| } |
| else |
| if (VG_(clo_xml)) { |
| VG_(message)(Vg_UserMsg, ""); |
| VG_(message)(Vg_UserMsg, "<pid>%d</pid>", VG_(getpid)()); |
| VG_(message)(Vg_UserMsg, "<ppid>%d</ppid>", VG_(getppid)()); |
| VG_(message_no_f_c)(Vg_UserMsg, "<tool>%t</tool>", toolname); |
| if (VG_(clo_log_name)) |
| print_file_vars(VG_(clo_log_name)); |
| if (VG_(clo_xml_user_comment)) { |
| /* Note: the user comment itself is XML and is therefore to |
| be passed through verbatim (%s) rather than escaped |
| (%t). */ |
| VG_(message)(Vg_UserMsg, "<usercomment>%s</usercomment>", |
| VG_(clo_xml_user_comment)); |
| } |
| VG_(message)(Vg_UserMsg, ""); |
| VG_(message)(Vg_UserMsg, "<args>"); |
| |
| VG_(message)(Vg_UserMsg, " <vargv>"); |
| if (VG_(name_of_launcher)) |
| VG_(message_no_f_c)(Vg_UserMsg, " <exe>%t</exe>", |
| VG_(name_of_launcher)); |
| else |
| VG_(message_no_f_c)(Vg_UserMsg, " <exe>%t</exe>", |
| "(launcher name unknown)"); |
| for (i = 0; i < VG_(sizeXA)( VG_(args_for_valgrind) ); i++) { |
| VG_(message_no_f_c)(Vg_UserMsg, |
| " <arg>%t</arg>", |
| * (HChar**) VG_(indexXA)( VG_(args_for_valgrind), i )); |
| } |
| VG_(message)(Vg_UserMsg, " </vargv>"); |
| |
| VG_(message)(Vg_UserMsg, " <argv>"); |
| if (VG_(args_the_exename)) |
| VG_(message_no_f_c)(Vg_UserMsg, " <exe>%t</exe>", |
| VG_(args_the_exename)); |
| for (i = 0; i < VG_(sizeXA)( VG_(args_for_client) ); i++) { |
| VG_(message_no_f_c)(Vg_UserMsg, |
| " <arg>%t</arg>", |
| * (HChar**) VG_(indexXA)( VG_(args_for_client), i )); |
| } |
| VG_(message)(Vg_UserMsg, " </argv>"); |
| |
| VG_(message)(Vg_UserMsg, "</args>"); |
| } |
| |
| // Empty line after the preamble |
| if (VG_(clo_verbosity) > 0) |
| VG_(message)(Vg_UserMsg, ""); |
| |
| if (VG_(clo_verbosity) > 1) { |
| SysRes fd; |
| VexArch vex_arch; |
| VexArchInfo vex_archinfo; |
| if (!logging_to_fd) |
| VG_(message)(Vg_DebugMsg, ""); |
| VG_(message)(Vg_DebugMsg, "Command line"); |
| if (VG_(args_the_exename)) |
| VG_(message)(Vg_DebugMsg, " %s", VG_(args_the_exename)); |
| for (i = 0; i < VG_(sizeXA)( VG_(args_for_client) ); i++) |
| VG_(message)(Vg_DebugMsg, |
| " %s", |
| * (HChar**) VG_(indexXA)( VG_(args_for_client), i )); |
| |
| VG_(message)(Vg_DebugMsg, "Startup, with flags:"); |
| for (i = 0; i < VG_(sizeXA)( VG_(args_for_valgrind) ); i++) { |
| VG_(message)(Vg_DebugMsg, |
| " %s", |
| * (HChar**) VG_(indexXA)( VG_(args_for_valgrind), i )); |
| } |
| |
| VG_(message)(Vg_DebugMsg, "Contents of /proc/version:"); |
| fd = VG_(open) ( "/proc/version", VKI_O_RDONLY, 0 ); |
| if (fd.isError) { |
| VG_(message)(Vg_DebugMsg, " can't open /proc/version"); |
| } else { |
| # define BUF_LEN 256 |
| Char version_buf[BUF_LEN]; |
| Int n = VG_(read) ( fd.res, version_buf, BUF_LEN ); |
| vg_assert(n <= BUF_LEN); |
| if (n > 0) { |
| version_buf[n-1] = '\0'; |
| VG_(message)(Vg_DebugMsg, " %s", version_buf); |
| } else { |
| VG_(message)(Vg_DebugMsg, " (empty?)"); |
| } |
| VG_(close)(fd.res); |
| # undef BUF_LEN |
| } |
| |
| VG_(machine_get_VexArchInfo)( &vex_arch, &vex_archinfo ); |
| VG_(message)( |
| Vg_DebugMsg, |
| "Arch and hwcaps: %s, %s", |
| LibVEX_ppVexArch ( vex_arch ), |
| LibVEX_ppVexHwCaps ( vex_arch, vex_archinfo.hwcaps ) |
| ); |
| VG_(message)( |
| Vg_DebugMsg, |
| "Page sizes: currently %d, max supported %d", |
| (Int)VKI_PAGE_SIZE, (Int)VKI_MAX_PAGE_SIZE |
| ); |
| VG_(message)(Vg_DebugMsg, "Valgrind library directory: %s", VG_(libdir)); |
| } |
| } |
| |
| |
| /*====================================================================*/ |
| /*=== File descriptor setup ===*/ |
| /*====================================================================*/ |
| |
| /* Number of file descriptors that Valgrind tries to reserve for |
| it's own use - just a small constant. */ |
| #define N_RESERVED_FDS (10) |
| |
| static void setup_file_descriptors(void) |
| { |
| struct vki_rlimit rl; |
| Bool show = False; |
| |
| /* Get the current file descriptor limits. */ |
| if (VG_(getrlimit)(VKI_RLIMIT_NOFILE, &rl) < 0) { |
| rl.rlim_cur = 1024; |
| rl.rlim_max = 1024; |
| } |
| |
| if (show) |
| VG_(printf)("fd limits: host, before: cur %lu max %lu\n", |
| (UWord)rl.rlim_cur, (UWord)rl.rlim_max); |
| |
| # if defined(VGP_ppc32_aix5) || defined(VGP_ppc64_aix5) |
| /* I don't know why this kludge is needed; however if rl.rlim_cur |
| is RLIM_INFINITY, then VG_(safe_fd)'s attempts using VG_(fcntl) |
| to lift V's file descriptors above the threshold RLIM_INFINITY - |
| N_RESERVED_FDS fail. So just use a relatively conservative |
| value in this case. */ |
| if (rl.rlim_cur > 1024) |
| rl.rlim_cur = 1024; |
| # endif |
| |
| /* Work out where to move the soft limit to. */ |
| if (rl.rlim_cur + N_RESERVED_FDS <= rl.rlim_max) { |
| rl.rlim_cur = rl.rlim_cur + N_RESERVED_FDS; |
| } else { |
| rl.rlim_cur = rl.rlim_max; |
| } |
| |
| /* Reserve some file descriptors for our use. */ |
| VG_(fd_soft_limit) = rl.rlim_cur - N_RESERVED_FDS; |
| VG_(fd_hard_limit) = rl.rlim_cur - N_RESERVED_FDS; |
| |
| /* Update the soft limit. */ |
| VG_(setrlimit)(VKI_RLIMIT_NOFILE, &rl); |
| |
| if (show) { |
| VG_(printf)("fd limits: host, after: cur %lu max %lu\n", |
| (UWord)rl.rlim_cur, (UWord)rl.rlim_max); |
| VG_(printf)("fd limits: guest : cur %u max %u\n", |
| VG_(fd_soft_limit), VG_(fd_hard_limit)); |
| } |
| |
| if (VG_(cl_exec_fd) != -1) |
| VG_(cl_exec_fd) = VG_(safe_fd)( VG_(cl_exec_fd) ); |
| } |
| |
| |
| /*====================================================================*/ |
| /*=== BB profiling ===*/ |
| /*====================================================================*/ |
| |
| static |
| void show_BB_profile ( BBProfEntry tops[], UInt n_tops, ULong score_total ) |
| { |
| ULong score_cumul, score_here; |
| Char buf_cumul[10], buf_here[10]; |
| Char name[64]; |
| Int r; |
| |
| VG_(printf)("\n"); |
| VG_(printf)("-----------------------------------------------------------\n"); |
| VG_(printf)("--- BEGIN BB Profile (summary of scores) ---\n"); |
| VG_(printf)("-----------------------------------------------------------\n"); |
| VG_(printf)("\n"); |
| |
| VG_(printf)("Total score = %lld\n\n", score_total); |
| |
| score_cumul = 0; |
| for (r = 0; r < n_tops; r++) { |
| if (tops[r].addr == 0) |
| continue; |
| name[0] = 0; |
| VG_(get_fnname_w_offset)(tops[r].addr, name, 64); |
| name[63] = 0; |
| score_here = tops[r].score; |
| score_cumul += score_here; |
| VG_(percentify)(score_cumul, score_total, 2, 6, buf_cumul); |
| VG_(percentify)(score_here, score_total, 2, 6, buf_here); |
| VG_(printf)("%3d: (%9lld %s) %9lld %s 0x%llx %s\n", |
| r, |
| score_cumul, buf_cumul, |
| score_here, buf_here, tops[r].addr, name ); |
| } |
| |
| VG_(printf)("\n"); |
| VG_(printf)("-----------------------------------------------------------\n"); |
| VG_(printf)("--- BB Profile (BB details) ---\n"); |
| VG_(printf)("-----------------------------------------------------------\n"); |
| VG_(printf)("\n"); |
| |
| score_cumul = 0; |
| for (r = 0; r < n_tops; r++) { |
| if (tops[r].addr == 0) |
| continue; |
| name[0] = 0; |
| VG_(get_fnname_w_offset)(tops[r].addr, name, 64); |
| name[63] = 0; |
| score_here = tops[r].score; |
| score_cumul += score_here; |
| VG_(percentify)(score_cumul, score_total, 2, 6, buf_cumul); |
| VG_(percentify)(score_here, score_total, 2, 6, buf_here); |
| VG_(printf)("\n"); |
| VG_(printf)("=-=-=-=-=-=-=-=-=-=-=-=-=-= begin BB rank %d " |
| "=-=-=-=-=-=-=-=-=-=-=-=-=-=\n\n", r); |
| VG_(printf)("%3d: (%9lld %s) %9lld %s 0x%llx %s\n", |
| r, |
| score_cumul, buf_cumul, |
| score_here, buf_here, tops[r].addr, name ); |
| VG_(printf)("\n"); |
| VG_(discard_translations)(tops[r].addr, 1, "bb profile"); |
| VG_(translate)(0, tops[r].addr, True, VG_(clo_profile_flags), 0, True); |
| VG_(printf)("=-=-=-=-=-=-=-=-=-=-=-=-=-= end BB rank %d " |
| "=-=-=-=-=-=-=-=-=-=-=-=-=-=\n\n", r); |
| } |
| |
| VG_(printf)("\n"); |
| VG_(printf)("-----------------------------------------------------------\n"); |
| VG_(printf)("--- END BB Profile ---\n"); |
| VG_(printf)("-----------------------------------------------------------\n"); |
| VG_(printf)("\n"); |
| } |
| |
| |
| /*====================================================================*/ |
| /*=== main() ===*/ |
| /*====================================================================*/ |
| |
| /* When main() is entered, we should be on the following stack, not |
| the one the kernel gave us. We will run on this stack until |
| simulation of the root thread is started, at which point a transfer |
| is made to a dynamically allocated stack. This is for the sake of |
| uniform overflow detection for all Valgrind threads. This is |
| marked global even though it isn't, because assembly code below |
| needs to reference the name. */ |
| |
| /*static*/ VgStack VG_(interim_stack); |
| |
| /* These are the structures used to hold info for creating the initial |
| client image. |
| |
| 'iicii' mostly holds important register state present at system |
| startup (_start_valgrind). valgrind_main() then fills in the rest |
| of it and passes it to VG_(ii_create_image)(). That produces |
| 'iifii', which is later handed to VG_(ii_finalise_image). */ |
| |
| /* In all OS-instantiations, the_iicii has a field .sp_at_startup. |
| This should get some address inside the stack on which we gained |
| control (eg, it could be the SP at startup). It doesn't matter |
| exactly where in the stack it is. This value is passed to the |
| address space manager at startup. On Linux, aspacem then uses it |
| to identify the initial stack segment and hence the upper end of |
| the usable address space. */ |
| |
| static IICreateImageInfo the_iicii; |
| static IIFinaliseImageInfo the_iifii; |
| |
| |
| /* A simple pair structure, used for conveying debuginfo handles to |
| calls to VG_TRACK(new_mem_startup, ...). */ |
| typedef struct { Addr a; ULong ull; } Addr_n_ULong; |
| |
| |
| /* --- Forwards decls to do with shutdown --- */ |
| |
| static void final_tidyup(ThreadId tid); |
| |
| /* Do everything which needs doing when the last thread exits */ |
| static |
| void shutdown_actions_NORETURN( ThreadId tid, |
| VgSchedReturnCode tids_schedretcode ); |
| |
| /* --- end of Forwards decls to do with shutdown --- */ |
| |
| |
| /* TODO: GIVE THIS A PROPER HOME |
| TODO: MERGE THIS WITH DUPLICATE IN mc_leakcheck.c and coredump-elf.c. |
| Extract from aspacem a vector of the current segment start |
| addresses. The vector is dynamically allocated and should be freed |
| by the caller when done. REQUIRES m_mallocfree to be running. |
| Writes the number of addresses required into *n_acquired. */ |
| |
| static Addr* get_seg_starts ( /*OUT*/Int* n_acquired ) |
| { |
| Addr* starts; |
| Int n_starts, r = 0; |
| |
| n_starts = 1; |
| while (True) { |
| starts = VG_(malloc)( "main.gss.1", n_starts * sizeof(Addr) ); |
| if (starts == NULL) |
| break; |
| r = VG_(am_get_segment_starts)( starts, n_starts ); |
| if (r >= 0) |
| break; |
| VG_(free)(starts); |
| n_starts *= 2; |
| } |
| |
| if (starts == NULL) { |
| *n_acquired = 0; |
| return NULL; |
| } |
| |
| *n_acquired = r; |
| return starts; |
| } |
| |
| |
| /* By the time we get to valgrind_main, the_iicii should already have |
| been filled in with any important details as required by whatever |
| OS we have been built for. |
| */ |
| static |
| Int valgrind_main ( Int argc, HChar **argv, HChar **envp ) |
| { |
| HChar* toolname = "memcheck"; // default to Memcheck |
| Int need_help = 0; // 0 = no, 1 = --help, 2 = --help-debug |
| ThreadId tid_main = VG_INVALID_THREADID; |
| Int loglevel, i; |
| Bool logging_to_fd; |
| struct vki_rlimit zero = { 0, 0 }; |
| XArray* addr2dihandle = NULL; |
| |
| //============================================================ |
| // |
| // Nb: startup is complex. Prerequisites are shown at every step. |
| // *** Be very careful when messing with the order *** |
| // |
| // The first order of business is to get debug logging, the address |
| // space manager and the dynamic memory manager up and running. |
| // Once that's done, we can relax a bit. |
| // |
| //============================================================ |
| |
| /* This is needed to make VG_(getenv) usable early. */ |
| VG_(client_envp) = (Char**)envp; |
| |
| //-------------------------------------------------------------- |
| // Start up the logging mechanism |
| // p: none |
| //-------------------------------------------------------------- |
| /* Start the debugging-log system ASAP. First find out how many |
| "-d"s were specified. This is a pre-scan of the command line. Also |
| get --profile-heap=yes which is needed by the time we start up dynamic |
| memory management. */ |
| loglevel = 0; |
| for (i = 1; i < argc; i++) { |
| if (argv[i][0] != '-') break; |
| if VG_STREQ(argv[i], "--") break; |
| if VG_STREQ(argv[i], "-d") loglevel++; |
| if VG_BOOL_CLO(argv[i], "--profile-heap", VG_(clo_profile_heap)) {} |
| } |
| |
| /* ... and start the debug logger. Now we can safely emit logging |
| messages all through startup. */ |
| VG_(debugLog_startup)(loglevel, "Stage 2 (main)"); |
| VG_(debugLog)(1, "main", "Welcome to Valgrind version " |
| VERSION " debug logging\n"); |
| |
| //-------------------------------------------------------------- |
| // AIX5 only: register the system call numbers |
| // p: logging |
| // p: that the initial few syscall numbers stated in the |
| // bootblock have been installed (else we can't |
| // open/read/close). |
| //-------------------------------------------------------------- |
| # if defined(VGO_aix5) |
| VG_(debugLog)(1, "main", "aix5: registering syscalls ..\n"); |
| { UChar sysent_name[50]; |
| SysRes fd; |
| Bool ok; |
| Int n_unregd, sysent_used = 0; |
| prsysent_t* sysent_hdr; |
| |
| VG_(sprintf)(sysent_name, "/proc/%d/sysent", VG_(getpid)()); |
| fd = VG_(open)(sysent_name, VKI_O_RDONLY, 0); |
| if (fd.isError) |
| VG_(err_config_error)("aix5: can't open /proc/<pid>/sysent"); |
| |
| sysent_used = VG_(read)(fd.res, aix5_sysent_buf, VG_AIX5_SYSENT_SIZE); |
| if (sysent_used < 0) |
| VG_(err_config_error)("aix5: error reading /proc/<pid>/sysent"); |
| if (sysent_used >= VG_AIX5_SYSENT_SIZE) |
| VG_(err_config_error)("aix5: VG_AIX5_SYSENT_SIZE is too low; " |
| "increase and recompile"); |
| VG_(close)(fd.res); |
| |
| vg_assert(sysent_used > 0 && sysent_used < VG_AIX5_SYSENT_SIZE); |
| |
| sysent_hdr = (prsysent_t*)&aix5_sysent_buf[0]; |
| |
| n_unregd = 0; |
| for (i = 0; i < sysent_hdr->pr_nsyscalls; i++) { |
| UChar* name = &aix5_sysent_buf[ sysent_hdr |
| ->pr_syscall[i].pr_nameoff ]; |
| UInt nmbr = sysent_hdr->pr_syscall[i].pr_number; |
| VG_(debugLog)(3, "main", "aix5: bind syscall %d to \"%s\"\n", |
| nmbr, name); |
| ok = VG_(aix5_register_syscall)(nmbr, name); |
| if (!ok) |
| n_unregd++; |
| if (!ok) |
| VG_(debugLog)(3, "main", |
| "aix5: bind FAILED: %d to \"%s\"\n", |
| nmbr, name); |
| } |
| VG_(debugLog)(1, "main", "aix5: .. %d syscalls known, %d unknown\n", |
| sysent_hdr->pr_nsyscalls - n_unregd, n_unregd ); |
| VG_(debugLog)(1, "main", "aix5: __NR_AIX5_FAKE_SIGRETURN = %d\n", |
| __NR_AIX5_FAKE_SIGRETURN ); |
| } |
| # endif |
| |
| //-------------------------------------------------------------- |
| // Ensure we're on a plausible stack. |
| // p: logging |
| //-------------------------------------------------------------- |
| VG_(debugLog)(1, "main", "Checking current stack is plausible\n"); |
| { HChar* limLo = (HChar*)(&VG_(interim_stack).bytes[0]); |
| HChar* limHi = limLo + sizeof(VG_(interim_stack)); |
| HChar* aLocal = (HChar*)&zero; /* any auto local will do */ |
| if (aLocal < limLo || aLocal >= limHi) { |
| /* something's wrong. Stop. */ |
| VG_(debugLog)(0, "main", "Root stack %p to %p, a local %p\n", |
| limLo, limHi, aLocal ); |
| VG_(debugLog)(0, "main", "Valgrind: FATAL: " |
| "Initial stack switched failed.\n"); |
| VG_(debugLog)(0, "main", " Cannot continue. Sorry.\n"); |
| VG_(exit)(1); |
| } |
| } |
| |
| //-------------------------------------------------------------- |
| // Ensure we have a plausible pointer to the stack on which |
| // we gained control (not the current stack!) |
| // p: logging |
| //-------------------------------------------------------------- |
| VG_(debugLog)(1, "main", "Checking initial stack was noted\n"); |
| if (the_iicii.sp_at_startup == 0) { |
| VG_(debugLog)(0, "main", "Valgrind: FATAL: " |
| "Initial stack was not noted.\n"); |
| VG_(debugLog)(0, "main", " Cannot continue. Sorry.\n"); |
| VG_(exit)(1); |
| } |
| |
| //-------------------------------------------------------------- |
| // Start up the address space manager, and determine the |
| // approximate location of the client's stack |
| // p: logging, plausible-stack |
| //-------------------------------------------------------------- |
| VG_(debugLog)(1, "main", "Starting the address space manager\n"); |
| vg_assert(VKI_PAGE_SIZE == 4096 || VKI_PAGE_SIZE == 65536); |
| vg_assert(VKI_MAX_PAGE_SIZE == 4096 || VKI_MAX_PAGE_SIZE == 65536); |
| vg_assert(VKI_PAGE_SIZE <= VKI_MAX_PAGE_SIZE); |
| vg_assert(VKI_PAGE_SIZE == (1 << VKI_PAGE_SHIFT)); |
| vg_assert(VKI_MAX_PAGE_SIZE == (1 << VKI_MAX_PAGE_SHIFT)); |
| the_iicii.clstack_top = VG_(am_startup)( the_iicii.sp_at_startup ); |
| VG_(debugLog)(1, "main", "Address space manager is running\n"); |
| |
| //-------------------------------------------------------------- |
| // Start up the dynamic memory manager |
| // p: address space management |
| // p: getting --profile-heap |
| // In fact m_mallocfree is self-initialising, so there's no |
| // initialisation call to do. Instead, try a simple malloc/ |
| // free pair right now to check that nothing is broken. |
| //-------------------------------------------------------------- |
| VG_(debugLog)(1, "main", "Starting the dynamic memory manager\n"); |
| { void* p = VG_(malloc)( "main.vm.1", 12345 ); |
| if (p) VG_(free)( p ); |
| } |
| VG_(debugLog)(1, "main", "Dynamic memory manager is running\n"); |
| |
| //============================================================ |
| // |
| // Dynamic memory management is now available. |
| // |
| //============================================================ |
| |
| //-------------------------------------------------------------- |
| // Initialise m_debuginfo |
| // p: dynamic memory allocation |
| VG_(debugLog)(1, "main", "Initialise m_debuginfo\n"); |
| VG_(di_initialise)(); |
| |
| //-------------------------------------------------------------- |
| // Look for alternative libdir |
| { HChar *cp = VG_(getenv)(VALGRIND_LIB); |
| if (cp != NULL) |
| VG_(libdir) = cp; |
| } |
| |
| //-------------------------------------------------------------- |
| // Extract the launcher name from the environment. |
| VG_(debugLog)(1, "main", "Getting stage1's name\n"); |
| VG_(name_of_launcher) = VG_(getenv)(VALGRIND_LAUNCHER); |
| if (VG_(name_of_launcher) == NULL) { |
| VG_(printf)("valgrind: You cannot run '%s' directly.\n", argv[0]); |
| VG_(printf)("valgrind: You should use $prefix/bin/valgrind.\n"); |
| VG_(exit)(1); |
| } |
| |
| //-------------------------------------------------------------- |
| // Get the current process datasize rlimit, and set it to zero. |
| // This prevents any internal uses of brk() from having any effect. |
| // We remember the old value so we can restore it on exec, so that |
| // child processes will have a reasonable brk value. |
| VG_(getrlimit)(VKI_RLIMIT_DATA, &VG_(client_rlimit_data)); |
| zero.rlim_max = VG_(client_rlimit_data).rlim_max; |
| VG_(setrlimit)(VKI_RLIMIT_DATA, &zero); |
| |
| // Get the current process stack rlimit. |
| VG_(getrlimit)(VKI_RLIMIT_STACK, &VG_(client_rlimit_stack)); |
| |
| //-------------------------------------------------------------- |
| // Figure out what sort of CPU we're on, and whether it is |
| // able to run V. |
| VG_(debugLog)(1, "main", "Get hardware capabilities ...\n"); |
| { VexArch vex_arch; |
| VexArchInfo vex_archinfo; |
| Bool ok = VG_(machine_get_hwcaps)(); |
| if (!ok) { |
| VG_(printf)("\n"); |
| VG_(printf)("valgrind: fatal error: unsupported CPU.\n"); |
| VG_(printf)(" Supported CPUs are:\n"); |
| VG_(printf)(" * x86 (practically any; Pentium-I or above), " |
| "AMD Athlon or above)\n"); |
| VG_(printf)(" * AMD Athlon64/Opteron\n"); |
| VG_(printf)(" * PowerPC (most; ppc405 and above)\n"); |
| VG_(printf)("\n"); |
| VG_(exit)(1); |
| } |
| VG_(machine_get_VexArchInfo)( &vex_arch, &vex_archinfo ); |
| VG_(debugLog)( |
| 1, "main", "... arch = %s, hwcaps = %s\n", |
| LibVEX_ppVexArch ( vex_arch ), |
| LibVEX_ppVexHwCaps ( vex_arch, vex_archinfo.hwcaps ) |
| ); |
| } |
| |
| //-------------------------------------------------------------- |
| // Record the working directory at startup |
| // p: none (Linux), getenv and sys_getpid work (AIX) |
| VG_(debugLog)(1, "main", "Getting the working directory at startup\n"); |
| { Bool ok = VG_(record_startup_wd)(); |
| if (!ok) |
| VG_(err_config_error)( "Can't establish current working " |
| "directory at startup"); |
| } |
| { Char buf[VKI_PATH_MAX+1]; |
| Bool ok = VG_(get_startup_wd)( buf, sizeof(buf) ); |
| vg_assert(ok); |
| buf[VKI_PATH_MAX] = 0; |
| VG_(debugLog)(1, "main", "... %s\n", buf ); |
| } |
| |
| //============================================================ |
| // Command line argument handling order: |
| // * If --help/--help-debug are present, show usage message |
| // (including the tool-specific usage) |
| // * (If no --tool option given, default to Memcheck) |
| // * Then, if client is missing, abort with error msg |
| // * Then, if any cmdline args are bad, abort with error msg |
| //============================================================ |
| |
| //-------------------------------------------------------------- |
| // Split up argv into: C args, V args, V extra args, and exename. |
| // p: dynamic memory allocation |
| //-------------------------------------------------------------- |
| VG_(debugLog)(1, "main", "Split up command line\n"); |
| VG_(split_up_argv)( argc, argv ); |
| vg_assert( VG_(args_for_valgrind) ); |
| vg_assert( VG_(args_for_client) ); |
| if (0) { |
| for (i = 0; i < VG_(sizeXA)( VG_(args_for_valgrind) ); i++) |
| VG_(printf)( |
| "varg %s\n", |
| * (HChar**) VG_(indexXA)( VG_(args_for_valgrind), i ) |
| ); |
| VG_(printf)(" exe %s\n", VG_(args_the_exename)); |
| for (i = 0; i < VG_(sizeXA)( VG_(args_for_client) ); i++) |
| VG_(printf)( |
| "carg %s\n", |
| * (HChar**) VG_(indexXA)( VG_(args_for_client), i ) |
| ); |
| } |
| |
| # if defined(VGO_aix5) |
| /* Tolerate ptraced-based launchers. They can't run 'no program' |
| if the user types "valgrind --help", so they run a do-nothing |
| program $prefix/bin/no_op_client_for_valgrind, and we catch that |
| here and turn it the exe name back into NULL. Then --help, |
| --version etc work as they should. */ |
| if (VG_(args_the_exename) |
| && VG_(strstr)( VG_(args_the_exename), "/no_op_client_for_valgrind" )) { |
| VG_(args_the_exename) = NULL; |
| } |
| # endif |
| |
| //-------------------------------------------------------------- |
| // Extract tool name and whether help has been requested. |
| // Note we can't print the help message yet, even if requested, |
| // because the tool has not been initialised. |
| // p: split_up_argv [for VG_(args_for_valgrind)] |
| //-------------------------------------------------------------- |
| VG_(debugLog)(1, "main", |
| "(early_) Process Valgrind's command line options\n"); |
| early_process_cmd_line_options(&need_help, &toolname); |
| |
| // Set default vex control params |
| LibVEX_default_VexControl(& VG_(clo_vex_control)); |
| |
| //-------------------------------------------------------------- |
| // Load client executable, finding in $PATH if necessary |
| // p: early_process_cmd_line_options() [for 'exec', 'need_help', |
| // clo_max_stackframe, |
| // clo_main_stacksize] |
| // p: layout_remaining_space [so there's space] |
| // |
| // Set up client's environment |
| // p: set-libdir [for VG_(libdir)] |
| // p: early_process_cmd_line_options [for toolname] |
| // |
| // Setup client stack, eip, and VG_(client_arg[cv]) |
| // p: load_client() [for 'info'] |
| // p: fix_environment() [for 'env'] |
| // |
| // Setup client data (brk) segment. Initially a 1-page segment |
| // which abuts a shrinkable reservation. |
| // p: load_client() [for 'info' and hence VG_(brk_base)] |
| // |
| // p: _start_in_C (for zeroing out the_iicii and putting some |
| // initial values into it) |
| //-------------------------------------------------------------- |
| if (!need_help) { |
| VG_(debugLog)(1, "main", "Create initial image\n"); |
| |
| # if defined(VGO_linux) |
| the_iicii.argv = argv; |
| the_iicii.envp = envp; |
| the_iicii.toolname = toolname; |
| # elif defined(VGO_aix5) |
| /* the_iicii.intregs37 already set up */ |
| /* the_iicii.bootblock already set up */ |
| /* the_iicii.adler32_exp already set up */ |
| /* the_iicii.sp_at_startup is irrelevant */ |
| /* the_iicii.clstack_top is irrelevant */ |
| the_iicii.toolname = toolname; |
| # else |
| # error "Uknown platform" |
| # endif |
| |
| /* NOTE: this call reads VG_(clo_main_stacksize). */ |
| the_iifii = VG_(ii_create_image)( the_iicii ); |
| |
| # if defined(VGO_aix5) |
| /* Tell aspacem where the initial client stack is, so that it |
| can later produce a faked-up NSegment in response to |
| VG_(am_find_nsegment) for that address range, if asked. */ |
| /* NOTE: this call reads VG_(clo_main_stacksize). */ |
| VG_(am_aix5_set_initial_client_sp)( the_iifii.initial_client_SP ); |
| /* Now have a look at said fake segment, so we can find out |
| the size of it. */ |
| { SizeT sz; |
| NSegment const* seg |
| = VG_(am_find_nsegment)( the_iifii.initial_client_SP ); |
| vg_assert(seg); |
| sz = seg->end - seg->start + 1; |
| vg_assert(sz >= 0 && sz <= (256+1)*1024*1024); /* stay sane */ |
| the_iifii.clstack_max_size = sz; |
| } |
| # endif |
| } |
| |
| //============================================================== |
| // |
| // Finished loading/setting up the client address space. |
| // |
| //============================================================== |
| |
| //-------------------------------------------------------------- |
| // setup file descriptors |
| // p: n/a |
| //-------------------------------------------------------------- |
| VG_(debugLog)(1, "main", "Setup file descriptors\n"); |
| setup_file_descriptors(); |
| |
| //-------------------------------------------------------------- |
| // create the fake /proc/<pid>/cmdline file and then unlink it, |
| // but hold onto the fd, so we can hand it out to the client |
| // when it tries to open /proc/<pid>/cmdline for itself. |
| // p: setup file descriptors |
| //-------------------------------------------------------------- |
| if (!need_help) { |
| HChar buf[50], buf2[50+64]; |
| HChar nul[1]; |
| Int fd, r; |
| HChar* exename; |
| |
| VG_(debugLog)(1, "main", "Create fake /proc/<pid>/cmdline\n"); |
| |
| VG_(sprintf)(buf, "proc_%d_cmdline", VG_(getpid)()); |
| fd = VG_(mkstemp)( buf, buf2 ); |
| if (fd == -1) |
| VG_(err_config_error)("Can't create client cmdline file in /tmp."); |
| |
| nul[0] = 0; |
| exename = VG_(args_the_exename) ? VG_(args_the_exename) |
| : "unknown_exename"; |
| VG_(write)(fd, VG_(args_the_exename), |
| VG_(strlen)( VG_(args_the_exename) )); |
| VG_(write)(fd, nul, 1); |
| |
| for (i = 0; i < VG_(sizeXA)( VG_(args_for_client) ); i++) { |
| HChar* arg = * (HChar**) VG_(indexXA)( VG_(args_for_client), i ); |
| VG_(write)(fd, arg, VG_(strlen)( arg )); |
| VG_(write)(fd, nul, 1); |
| } |
| |
| /* Don't bother to seek the file back to the start; instead do |
| it every time a copy of it is given out (by PRE(sys_open)). |
| That is probably more robust across fork() etc. */ |
| |
| /* Now delete it, but hang on to the fd. */ |
| r = VG_(unlink)( buf2 ); |
| if (r) |
| VG_(err_config_error)("Can't delete client cmdline file in /tmp."); |
| |
| VG_(cl_cmdline_fd) = fd; |
| } |
| |
| //-------------------------------------------------------------- |
| // Init tool part 1: pre_clo_init |
| // p: setup_client_stack() [for 'VG_(client_arg[cv]'] |
| // p: setup_file_descriptors() [for 'VG_(fd_xxx_limit)'] |
| //-------------------------------------------------------------- |
| VG_(debugLog)(1, "main", "Initialise the tool part 1 (pre_clo_init)\n"); |
| VG_(tl_pre_clo_init)(); |
| |
| //-------------------------------------------------------------- |
| // If --tool and --help/--help-debug was given, now give the core+tool |
| // help message |
| // p: early_process_cmd_line_options() [for 'need_help'] |
| // p: tl_pre_clo_init [for 'VG_(tdict).usage'] |
| //-------------------------------------------------------------- |
| VG_(debugLog)(1, "main", "Print help and quit, if requested\n"); |
| if (need_help) { |
| usage_NORETURN(/*--help-debug?*/2 == need_help); |
| } |
| |
| //-------------------------------------------------------------- |
| // Process command line options to Valgrind + tool |
| // p: setup_client_stack() [for 'VG_(client_arg[cv]'] |
| // p: setup_file_descriptors() [for 'VG_(fd_xxx_limit)'] |
| //-------------------------------------------------------------- |
| VG_(debugLog)(1, "main", |
| "(main_) Process Valgrind's command line options, " |
| "setup logging\n"); |
| logging_to_fd = main_process_cmd_line_options(toolname); |
| |
| //-------------------------------------------------------------- |
| // Zeroise the millisecond counter by doing a first read of it. |
| // p: none |
| //-------------------------------------------------------------- |
| (void) VG_(read_millisecond_timer)(); |
| |
| //-------------------------------------------------------------- |
| // Print the preamble |
| // p: tl_pre_clo_init [for 'VG_(details).name' and friends] |
| // p: main_process_cmd_line_options() [for VG_(clo_verbosity), |
| // VG_(clo_xml), |
| // logging_to_fd] |
| //-------------------------------------------------------------- |
| VG_(debugLog)(1, "main", "Print the preamble...\n"); |
| print_preamble(logging_to_fd, toolname); |
| VG_(debugLog)(1, "main", "...finished the preamble\n"); |
| |
| //-------------------------------------------------------------- |
| // Init tool part 2: post_clo_init |
| // p: setup_client_stack() [for 'VG_(client_arg[cv]'] |
| // p: setup_file_descriptors() [for 'VG_(fd_xxx_limit)'] |
| // p: print_preamble() [so any warnings printed in post_clo_init |
| // are shown after the preamble] |
| //-------------------------------------------------------------- |
| VG_(debugLog)(1, "main", "Initialise the tool part 2 (post_clo_init)\n"); |
| VG_TDICT_CALL(tool_post_clo_init); |
| { |
| /* The tool's "needs" will by now be finalised, since it has no |
| further opportunity to specify them. So now sanity check |
| them. */ |
| Char* s; |
| Bool ok; |
| ok = VG_(sanity_check_needs)( &s ); |
| if (!ok) { |
| VG_(tool_panic)(s); |
| } |
| } |
| |
| //-------------------------------------------------------------- |
| // Initialise translation table and translation cache |
| // p: aspacem [??] |
| // p: tl_pre_clo_init [for 'VG_(details).avg_translation_sizeB'] |
| //-------------------------------------------------------------- |
| VG_(debugLog)(1, "main", "Initialise TT/TC\n"); |
| VG_(init_tt_tc)(); |
| |
| //-------------------------------------------------------------- |
| // Initialise the redirect table. |
| // p: init_tt_tc [so it can call VG_(search_transtab) safely] |
| // p: aspacem [so can change ownership of sysinfo pages] |
| //-------------------------------------------------------------- |
| VG_(debugLog)(1, "main", "Initialise redirects\n"); |
| VG_(redir_initialise)(); |
| |
| //-------------------------------------------------------------- |
| // Allow GDB attach |
| // p: main_process_cmd_line_options() [for VG_(clo_wait_for_gdb)] |
| //-------------------------------------------------------------- |
| /* Hook to delay things long enough so we can get the pid and |
| attach GDB in another shell. */ |
| if (VG_(clo_wait_for_gdb)) { |
| Long iters; |
| volatile Long q; |
| VG_(debugLog)(1, "main", "Wait for GDB\n"); |
| VG_(printf)("pid=%d, entering delay loop\n", VG_(getpid)()); |
| |
| # if defined(VGP_x86_linux) |
| iters = 5; |
| # elif defined(VGP_amd64_linux) || defined(VGP_ppc64_linux) |
| iters = 10; |
| # elif defined(VGP_ppc32_linux) |
| iters = 5; |
| # elif defined(VGP_ppc32_aix5) || defined(VGP_ppc64_aix5) |
| iters = 4; |
| # else |
| # error "Unknown plat" |
| # endif |
| |
| iters *= 1000*1000*1000; |
| for (q = 0; q < iters; q++) |
| ; |
| } |
| |
| //-------------------------------------------------------------- |
| // Search for file descriptors that are inherited from our parent |
| // p: main_process_cmd_line_options [for VG_(clo_track_fds)] |
| //-------------------------------------------------------------- |
| if (VG_(clo_track_fds)) { |
| VG_(debugLog)(1, "main", "Init preopened fds\n"); |
| VG_(init_preopened_fds)(); |
| } |
| |
| //-------------------------------------------------------------- |
| // Load debug info for the existing segments. |
| // p: setup_code_redirect_table [so that redirs can be recorded] |
| // p: mallocfree |
| // p: probably: setup fds and process CLOs, so that logging works |
| // p: initialise m_debuginfo |
| // |
| // While doing this, make a note of the debuginfo-handles that |
| // come back from VG_(di_notify_mmap)/VG_(di_aix5_notify_segchange). |
| // Later, in "Tell the tool about the initial client memory permissions" |
| // (just below) we can then hand these handles off to the tool in |
| // calls to VG_TRACK(new_mem_startup, ...). This gives the tool the |
| // opportunity to make further queries to m_debuginfo before the |
| // client is started, if it wants. We put this information into an |
| // XArray, each handle along with the associated segment start address, |
| // and search the XArray for the handles later, when calling |
| // VG_TRACK(new_mem_startup, ...). |
| //-------------------------------------------------------------- |
| VG_(debugLog)(1, "main", "Load initial debug info\n"); |
| |
| tl_assert(!addr2dihandle); |
| addr2dihandle = VG_(newXA)( VG_(malloc), "main.vm.2", |
| VG_(free), sizeof(Addr_n_ULong) ); |
| tl_assert(addr2dihandle); |
| |
| # if defined(VGO_linux) |
| { Addr* seg_starts; |
| Int n_seg_starts; |
| Addr_n_ULong anu; |
| |
| seg_starts = get_seg_starts( &n_seg_starts ); |
| vg_assert(seg_starts && n_seg_starts >= 0); |
| |
| /* show them all to the debug info reader. allow_SkFileV has to |
| be True here so that we read info from the valgrind executable |
| itself. */ |
| for (i = 0; i < n_seg_starts; i++) { |
| anu.ull = VG_(di_notify_mmap)( seg_starts[i], True/*allow_SkFileV*/ ); |
| /* anu.ull holds the debuginfo handle returned by di_notify_mmap, |
| if any. */ |
| if (anu.ull > 0) { |
| anu.a = seg_starts[i]; |
| VG_(addToXA)( addr2dihandle, &anu ); |
| } |
| } |
| |
| VG_(free)( seg_starts ); |
| } |
| # elif defined(VGO_aix5) |
| { AixCodeSegChange* changes; |
| Int changes_size, changes_used; |
| Addr_n_ULong anu; |
| |
| /* Find out how many AixCodeSegChange records we will need, |
| and acquire them. */ |
| changes_size = VG_(am_aix5_reread_procmap_howmany_directives)(); |
| changes = VG_(malloc)("main.vm.3", changes_size * sizeof(AixCodeSegChange)); |
| vg_assert(changes); |
| |
| /* Now re-read /proc/<pid>/map and acquire a change set */ |
| VG_(am_aix5_reread_procmap)( changes, &changes_used ); |
| vg_assert(changes_used >= 0 && changes_used <= changes_size); |
| |
| /* And notify m_debuginfo of the changes. */ |
| for (i = 0; i < changes_used; i++) { |
| anu.ull = VG_(di_aix5_notify_segchange)( |
| changes[i].code_start, |
| changes[i].code_len, |
| changes[i].data_start, |
| changes[i].data_len, |
| changes[i].file_name, |
| changes[i].mem_name, |
| changes[i].is_mainexe, |
| changes[i].acquire |
| ); |
| if (anu.ull > 0) { |
| tl_assert(changes[i].acquire); |
| anu.a = changes[i].code_start; /* is this correct? */ |
| VG_(addToXA)( addr2dihandle, &anu ); |
| } |
| } |
| |
| VG_(free)(changes); |
| } |
| # else |
| # error Unknown OS |
| # endif |
| |
| //-------------------------------------------------------------- |
| // Tell aspacem of ownership change of the asm helpers, so that |
| // m_translate allows them to be translated. However, only do this |
| // after the initial debug info read, since making a hole in the |
| // address range for the stage2 binary confuses the debug info reader. |
| // p: aspacem |
| //-------------------------------------------------------------- |
| { Bool change_ownership_v_c_OK; |
| Addr co_start = VG_PGROUNDDN( (Addr)&VG_(trampoline_stuff_start) ); |
| Addr co_endPlus = VG_PGROUNDUP( (Addr)&VG_(trampoline_stuff_end) ); |
| VG_(debugLog)(1,"redir", |
| "transfer ownership V -> C of 0x%llx .. 0x%llx\n", |
| (ULong)co_start, (ULong)co_endPlus-1 ); |
| |
| change_ownership_v_c_OK |
| = VG_(am_change_ownership_v_to_c)( co_start, co_endPlus - co_start ); |
| vg_assert(change_ownership_v_c_OK); |
| } |
| |
| //-------------------------------------------------------------- |
| // Initialise the scheduler (phase 1) [generates tid_main] |
| // p: none, afaics |
| //-------------------------------------------------------------- |
| VG_(debugLog)(1, "main", "Initialise scheduler (phase 1)\n"); |
| tid_main = VG_(scheduler_init_phase1)(); |
| vg_assert(tid_main >= 0 && tid_main < VG_N_THREADS |
| && tid_main != VG_INVALID_THREADID); |
| /* Tell the tool about tid_main */ |
| VG_TRACK( pre_thread_ll_create, VG_INVALID_THREADID, tid_main ); |
| |
| //-------------------------------------------------------------- |
| // Tell the tool about the initial client memory permissions |
| // p: aspacem |
| // p: mallocfree |
| // p: setup_client_stack |
| // p: setup_client_dataseg |
| // |
| // For each segment we tell the client about, look up in |
| // addr2dihandle as created above, to see if there's a debuginfo |
| // handle associated with the segment, that we can hand along |
| // to the tool, to be helpful. |
| //-------------------------------------------------------------- |
| VG_(debugLog)(1, "main", "Tell tool about initial permissions\n"); |
| { Addr* seg_starts; |
| Int n_seg_starts; |
| |
| tl_assert(addr2dihandle); |
| |
| /* Mark the main thread as running while we tell the tool about |
| the client memory so that the tool can associate that memory |
| with the main thread. */ |
| tl_assert(VG_(running_tid) == VG_INVALID_THREADID); |
| VG_(running_tid) = tid_main; |
| |
| seg_starts = get_seg_starts( &n_seg_starts ); |
| vg_assert(seg_starts && n_seg_starts >= 0); |
| |
| /* show interesting ones to the tool */ |
| for (i = 0; i < n_seg_starts; i++) { |
| Word j, n; |
| NSegment const* seg |
| = VG_(am_find_nsegment)( seg_starts[i] ); |
| vg_assert(seg); |
| if (seg->kind == SkFileC || seg->kind == SkAnonC) { |
| /* This next assertion is tricky. If it is placed |
| immediately before this 'if', it very occasionally fails. |
| Why? Because previous iterations of the loop may have |
| caused tools (via the new_mem_startup calls) to do |
| dynamic memory allocation, and that may affect the mapped |
| segments; in particular it may cause segment merging to |
| happen. Hence we cannot assume that seg_starts[i], which |
| reflects the state of the world before we started this |
| loop, is the same as seg->start, as the latter reflects |
| the state of the world (viz, mappings) at this particular |
| iteration of the loop. |
| |
| Why does moving it inside the 'if' make it safe? Because |
| any dynamic memory allocation done by the tools will |
| affect only the state of Valgrind-owned segments, not of |
| Client-owned segments. And the 'if' guards against that |
| -- we only get in here for Client-owned segments. |
| |
| In other words: the loop may change the state of |
| Valgrind-owned segments as it proceeds. But it should |
| not cause the Client-owned segments to change. */ |
| vg_assert(seg->start == seg_starts[i]); |
| VG_(debugLog)(2, "main", |
| "tell tool about %010lx-%010lx %c%c%c\n", |
| seg->start, seg->end, |
| seg->hasR ? 'r' : '-', |
| seg->hasW ? 'w' : '-', |
| seg->hasX ? 'x' : '-' ); |
| /* search addr2dihandle to see if we have an entry |
| matching seg->start. */ |
| n = VG_(sizeXA)( addr2dihandle ); |
| for (j = 0; j < n; j++) { |
| Addr_n_ULong* anl = VG_(indexXA)( addr2dihandle, j ); |
| if (anl->a == seg->start) { |
| tl_assert(anl->ull > 0); /* check it's a valid handle */ |
| break; |
| } |
| } |
| vg_assert(j >= 0 && j <= n); |
| VG_TRACK( new_mem_startup, seg->start, seg->end+1-seg->start, |
| seg->hasR, seg->hasW, seg->hasX, |
| /* and the retrieved debuginfo handle, if any */ |
| j < n |
| ? ((Addr_n_ULong*)VG_(indexXA)( addr2dihandle, j ))->ull |
| : 0 ); |
| } |
| } |
| |
| VG_(free)( seg_starts ); |
| VG_(deleteXA)( addr2dihandle ); |
| |
| /* Also do the initial stack permissions. */ |
| { NSegment const* seg |
| = VG_(am_find_nsegment)( the_iifii.initial_client_SP ); |
| vg_assert(seg); |
| vg_assert(seg->kind == SkAnonC); |
| vg_assert(the_iifii.initial_client_SP >= seg->start); |
| vg_assert(the_iifii.initial_client_SP <= seg->end); |
| # if defined(VGO_aix5) |
| VG_(clstk_base) = seg->start; |
| VG_(clstk_end) = seg->end; |
| # endif |
| |
| /* Stuff below the initial SP is unaddressable. Take into |
| account any ABI-mandated space below the stack pointer that |
| is required (VG_STACK_REDZONE_SZB). setup_client_stack() |
| will have allocated an extra page if a red zone is required, |
| to be on the safe side. */ |
| vg_assert(the_iifii.initial_client_SP - VG_STACK_REDZONE_SZB |
| >= seg->start); |
| VG_TRACK( die_mem_stack, |
| seg->start, |
| the_iifii.initial_client_SP - VG_STACK_REDZONE_SZB |
| - seg->start ); |
| VG_(debugLog)(2, "main", "mark stack inaccessible %010lx-%010lx\n", |
| seg->start, |
| the_iifii.initial_client_SP-1 - VG_STACK_REDZONE_SZB); |
| } |
| |
| /* Also the assembly helpers. */ |
| VG_TRACK( new_mem_startup, |
| (Addr)&VG_(trampoline_stuff_start), |
| (Addr)&VG_(trampoline_stuff_end) |
| - (Addr)&VG_(trampoline_stuff_start), |
| False, /* readable? */ |
| False, /* writable? */ |
| True /* executable? */, |
| 0 /* di_handle: no associated debug info */ ); |
| |
| /* Clear the running thread indicator */ |
| VG_(running_tid) = VG_INVALID_THREADID; |
| tl_assert(VG_(running_tid) == VG_INVALID_THREADID); |
| } |
| |
| //-------------------------------------------------------------- |
| // Initialise the scheduler (phase 2) |
| // p: Initialise the scheduler (phase 1) [for tid_main] |
| // p: setup_file_descriptors() [else VG_(safe_fd)() breaks] |
| // p: setup_client_stack |
| //-------------------------------------------------------------- |
| VG_(debugLog)(1, "main", "Initialise scheduler (phase 2)\n"); |
| { NSegment const* seg |
| = VG_(am_find_nsegment)( the_iifii.initial_client_SP ); |
| vg_assert(seg); |
| vg_assert(seg->kind == SkAnonC); |
| vg_assert(the_iifii.initial_client_SP >= seg->start); |
| vg_assert(the_iifii.initial_client_SP <= seg->end); |
| VG_(scheduler_init_phase2)( tid_main, |
| seg->end, the_iifii.clstack_max_size ); |
| } |
| |
| //-------------------------------------------------------------- |
| // Set up state for the root thread |
| // p: ? |
| // setup_scheduler() [for sched-specific thread 1 stuff] |
| // VG_(ii_create_image) [for 'the_iicii' initial info] |
| //-------------------------------------------------------------- |
| VG_(debugLog)(1, "main", "Finalise initial image\n"); |
| VG_(ii_finalise_image)( the_iifii ); |
| |
| //-------------------------------------------------------------- |
| // Initialise the signal handling subsystem |
| // p: n/a |
| //-------------------------------------------------------------- |
| // Nb: temporarily parks the saved blocking-mask in saved_sigmask. |
| VG_(debugLog)(1, "main", "Initialise signal management\n"); |
| VG_(sigstartup_actions)(); |
| |
| //-------------------------------------------------------------- |
| // Read suppression file |
| // p: main_process_cmd_line_options() [for VG_(clo_suppressions)] |
| //-------------------------------------------------------------- |
| if (VG_(needs).core_errors || VG_(needs).tool_errors) { |
| VG_(debugLog)(1, "main", "Load suppressions\n"); |
| VG_(load_suppressions)(); |
| } |
| |
| //-------------------------------------------------------------- |
| // register client stack |
| //-------------------------------------------------------------- |
| VG_(clstk_id) = VG_(register_stack)(VG_(clstk_base), VG_(clstk_end)); |
| |
| //-------------------------------------------------------------- |
| // Show the address space state so far |
| //-------------------------------------------------------------- |
| VG_(debugLog)(1, "main", "\n"); |
| VG_(debugLog)(1, "main", "\n"); |
| VG_(am_show_nsegments)(1,"Memory layout at client startup"); |
| VG_(debugLog)(1, "main", "\n"); |
| VG_(debugLog)(1, "main", "\n"); |
| |
| //-------------------------------------------------------------- |
| // Run! |
| //-------------------------------------------------------------- |
| if (VG_(clo_xml)) { |
| HChar buf[50]; |
| VG_(elapsed_wallclock_time)(buf); |
| VG_(message_no_f_c)(Vg_UserMsg, |
| "<status>\n" |
| " <state>RUNNING</state>\n" |
| " <time>%t</time>\n" |
| "</status>", |
| buf); |
| VG_(message)(Vg_UserMsg, ""); |
| } |
| |
| VG_(debugLog)(1, "main", "Running thread 1\n"); |
| |
| /* As a result of the following call, the last thread standing |
| eventually winds up running shutdown_actions_NORETURN |
| just below. Unfortunately, simply exporting said function |
| causes m_main to be part of a module cycle, which is pretty |
| nonsensical. So instead of doing that, the address of said |
| function is stored in a global variable 'owned' by m_syswrap, |
| and it uses that function pointer to get back here when it needs |
| to. */ |
| |
| /* Set continuation address. */ |
| VG_(address_of_m_main_shutdown_actions_NORETURN) |
| = & shutdown_actions_NORETURN; |
| |
| /* Run the first thread, eventually ending up at the continuation |
| address. */ |
| VG_(main_thread_wrapper_NORETURN)(1); |
| |
| /*NOTREACHED*/ |
| vg_assert(0); |
| } |
| |
| /* Do everything which needs doing when the last thread exits or when |
| a thread exits requesting a complete process exit (exit on AIX). |
| |
| We enter here holding The Lock. For the case VgSrc_ExitProcess we |
| must never release it, because to do so would allow other threads |
| to continue after the system is ostensibly shut down. So we must |
| go to our grave, so to speak, holding the lock. |
| |
| In fact, there is never any point in releasing the lock at this |
| point - we have it, we're shutting down the entire system, and |
| for the case VgSrc_ExitProcess doing so positively causes trouble. |
| So don't. |
| |
| The final_tidyup call makes a bit of a nonsense of the ExitProcess |
| case, since it will run the libc_freeres function, thus allowing |
| other lurking threads to run again. Hmm. */ |
| |
| static |
| void shutdown_actions_NORETURN( ThreadId tid, |
| VgSchedReturnCode tids_schedretcode ) |
| { |
| VG_(debugLog)(1, "main", "entering VG_(shutdown_actions_NORETURN)\n"); |
| VG_(am_show_nsegments)(1,"Memory layout at client shutdown"); |
| |
| vg_assert(VG_(is_running_thread)(tid)); |
| |
| vg_assert(tids_schedretcode == VgSrc_ExitThread |
| || tids_schedretcode == VgSrc_ExitProcess |
| || tids_schedretcode == VgSrc_FatalSig ); |
| |
| if (tids_schedretcode == VgSrc_ExitThread) { |
| |
| // We are the last surviving thread. Right? |
| vg_assert( VG_(count_living_threads)() == 1 ); |
| |
| // Wait for all other threads to exit. |
| // jrs: Huh? but they surely are already gone |
| VG_(reap_threads)(tid); |
| |
| // Clean the client up before the final report |
| // this causes the libc_freeres function to run |
| final_tidyup(tid); |
| |
| /* be paranoid */ |
| vg_assert(VG_(is_running_thread)(tid)); |
| vg_assert(VG_(count_living_threads)() == 1); |
| |
| } else { |
| |
| // We may not be the last surviving thread. However, we |
| // want to shut down the entire process. We hold the lock |
| // and we need to keep hold of it all the way out, in order |
| // that none of the other threads ever run again. |
| vg_assert( VG_(count_living_threads)() >= 1 ); |
| |
| // Clean the client up before the final report |
| // this causes the libc_freeres function to run |
| // perhaps this is unsafe, as per comment above |
| final_tidyup(tid); |
| |
| /* be paranoid */ |
| vg_assert(VG_(is_running_thread)(tid)); |
| vg_assert(VG_(count_living_threads)() >= 1); |
| } |
| |
| VG_(threads)[tid].status = VgTs_Empty; |
| //-------------------------------------------------------------- |
| // Finalisation: cleanup, messages, etc. Order no so important, only |
| // affects what order the messages come. |
| //-------------------------------------------------------------- |
| if (VG_(clo_verbosity) > 0) |
| VG_(message)(Vg_UserMsg, ""); |
| |
| if (VG_(clo_xml)) { |
| HChar buf[50]; |
| if (VG_(needs).core_errors || VG_(needs).tool_errors) { |
| VG_(show_error_counts_as_XML)(); |
| VG_(message)(Vg_UserMsg, ""); |
| } |
| VG_(elapsed_wallclock_time)(buf); |
| VG_(message_no_f_c)(Vg_UserMsg, |
| "<status>\n" |
| " <state>FINISHED</state>\n" |
| " <time>%t</time>\n" |
| "</status>", |
| buf); |
| VG_(message)(Vg_UserMsg, ""); |
| } |
| |
| /* Print out file descriptor summary and stats. */ |
| if (VG_(clo_track_fds)) |
| VG_(show_open_fds)(); |
| |
| if (VG_(needs).core_errors || VG_(needs).tool_errors) |
| VG_(show_all_errors)(); |
| |
| VG_TDICT_CALL(tool_fini, 0/*exitcode*/); |
| |
| if (VG_(clo_xml)) { |
| VG_(message)(Vg_UserMsg, ""); |
| VG_(message)(Vg_UserMsg, "</valgrindoutput>"); |
| VG_(message)(Vg_UserMsg, ""); |
| } |
| |
| VG_(sanity_check_general)( True /*include expensive checks*/ ); |
| |
| if (VG_(clo_verbosity) > 1) |
| print_all_stats(); |
| |
| /* Show a profile of the heap(s) at shutdown. Optionally, first |
| throw away all the debug info, as that makes it easy to spot |
| leaks in the debuginfo reader. */ |
| if (VG_(clo_profile_heap)) { |
| if (0) VG_(di_discard_ALL_debuginfo)(); |
| VG_(print_arena_cc_analysis)(); |
| } |
| |
| if (VG_(clo_profile_flags) > 0) { |
| #define N_MAX 200 |
| BBProfEntry tops[N_MAX]; |
| ULong score_total = VG_(get_BB_profile) (tops, N_MAX); |
| show_BB_profile(tops, N_MAX, score_total); |
| } |
| |
| /* Print Vex storage stats */ |
| if (0) |
| LibVEX_ShowAllocStats(); |
| |
| /* Ok, finally exit in the os-specific way, according to the scheduler's |
| return code. In short, if the (last) thread exited by calling |
| sys_exit, do likewise; if the (last) thread stopped due to a fatal |
| signal, terminate the entire system with that same fatal signal. */ |
| VG_(debugLog)(1, "core_os", |
| "VG_(terminate_NORETURN)(tid=%lld)\n", (ULong)tid); |
| |
| switch (tids_schedretcode) { |
| case VgSrc_ExitThread: /* the normal way out (Linux) */ |
| case VgSrc_ExitProcess: /* the normal way out (AIX) */ |
| /* Change the application return code to user's return code, |
| if an error was found */ |
| if (VG_(clo_error_exitcode) > 0 |
| && VG_(get_n_errs_found)() > 0) { |
| VG_(exit)( VG_(clo_error_exitcode) ); |
| } else { |
| /* otherwise, return the client's exit code, in the normal |
| way. */ |
| VG_(exit)( VG_(threads)[tid].os_state.exitcode ); |
| } |
| /* NOT ALIVE HERE! */ |
| VG_(core_panic)("entered the afterlife in main() -- ExitT/P"); |
| break; /* what the hell :) */ |
| |
| case VgSrc_FatalSig: |
| /* We were killed by a fatal signal, so replicate the effect */ |
| vg_assert(VG_(threads)[tid].os_state.fatalsig != 0); |
| VG_(kill_self)(VG_(threads)[tid].os_state.fatalsig); |
| VG_(core_panic)("main(): signal was supposed to be fatal"); |
| break; |
| |
| default: |
| VG_(core_panic)("main(): unexpected scheduler return code"); |
| } |
| } |
| |
| /* -------------------- */ |
| |
| /* Final clean-up before terminating the process. |
| Clean up the client by calling __libc_freeres() (if requested) |
| This is Linux-specific? |
| */ |
| static void final_tidyup(ThreadId tid) |
| { |
| # if defined(VGP_ppc64_linux) |
| Addr r2; |
| # endif |
| Addr __libc_freeres_wrapper = VG_(client___libc_freeres_wrapper); |
| |
| vg_assert(VG_(is_running_thread)(tid)); |
| |
| if ( !VG_(needs).libc_freeres || |
| !VG_(clo_run_libc_freeres) || |
| 0 == __libc_freeres_wrapper ) |
| return; /* can't/won't do it */ |
| # if defined(VGO_aix5) |
| return; /* inapplicable on non-Linux platforms */ |
| # endif |
| |
| # if defined(VGP_ppc64_linux) |
| r2 = VG_(get_tocptr)( __libc_freeres_wrapper ); |
| if (r2 == 0) { |
| VG_(message)(Vg_UserMsg, |
| "Caught __NR_exit, but can't run __libc_freeres()"); |
| VG_(message)(Vg_UserMsg, |
| " since cannot establish TOC pointer for it."); |
| return; |
| } |
| # endif |
| |
| if (VG_(clo_verbosity) > 2 || |
| VG_(clo_trace_syscalls) || |
| VG_(clo_trace_sched)) |
| VG_(message)(Vg_DebugMsg, |
| "Caught __NR_exit; running __libc_freeres()"); |
| |
| /* set thread context to point to libc_freeres_wrapper */ |
| /* ppc64-linux note: __libc_freeres_wrapper gives us the real |
| function entry point, not a fn descriptor, so can use it |
| directly. However, we need to set R2 (the toc pointer) |
| appropriately. */ |
| VG_(set_IP)(tid, __libc_freeres_wrapper); |
| # if defined(VGP_ppc64_linux) |
| VG_(threads)[tid].arch.vex.guest_GPR2 = r2; |
| # endif |
| |
| /* Block all blockable signals by copying the real block state into |
| the thread's block state*/ |
| VG_(sigprocmask)(VKI_SIG_BLOCK, NULL, &VG_(threads)[tid].sig_mask); |
| VG_(threads)[tid].tmp_sig_mask = VG_(threads)[tid].sig_mask; |
| |
| /* and restore handlers to default */ |
| VG_(set_default_handler)(VKI_SIGSEGV); |
| VG_(set_default_handler)(VKI_SIGBUS); |
| VG_(set_default_handler)(VKI_SIGILL); |
| VG_(set_default_handler)(VKI_SIGFPE); |
| |
| // We were exiting, so assert that... |
| vg_assert(VG_(is_exiting)(tid)); |
| // ...but now we're not again |
| VG_(threads)[tid].exitreason = VgSrc_None; |
| |
| // run until client thread exits - ideally with LIBC_FREERES_DONE, |
| // but exit/exitgroup/signal will do |
| VG_(scheduler)(tid); |
| |
| vg_assert(VG_(is_exiting)(tid)); |
| } |
| |
| |
| /*====================================================================*/ |
| /*=== Getting to main() alive: LINUX (for AIX5 see below) ===*/ |
| /*====================================================================*/ |
| |
| #if defined(VGO_linux) |
| |
| /* If linking of the final executables is done with glibc present, |
| then Valgrind starts at main() above as usual, and all of the |
| following code is irrelevant. |
| |
| However, this is not the intended mode of use. The plan is to |
| avoid linking against glibc, by giving gcc the flags |
| -nodefaultlibs -lgcc -nostartfiles at startup. |
| |
| From this derive two requirements: |
| |
| 1. gcc may emit calls to memcpy and memset to deal with structure |
| assignments etc. Since we have chosen to ignore all the |
| "normal" supporting libraries, we have to provide our own |
| implementations of them. No problem. |
| |
| 2. We have to provide a symbol "_start", to which the kernel |
| hands control at startup. Hence the code below. |
| */ |
| |
| /* ---------------- Requirement 1 ---------------- */ |
| |
| void* memcpy(void *dest, const void *src, SizeT n); |
| void* memcpy(void *dest, const void *src, SizeT n) { |
| return VG_(memcpy)(dest,src,n); |
| } |
| void* memset(void *s, int c, SizeT n); |
| void* memset(void *s, int c, SizeT n) { |
| return VG_(memset)(s,c,n); |
| } |
| |
| /* ---------------- Requirement 2 ---------------- */ |
| |
| /* Glibc's sysdeps/i386/elf/start.S has the following gem of a |
| comment, which explains how the stack looks right at process start |
| (when _start is jumped to). Hence _start passes %esp to |
| _start_in_C_linux, which extracts argc/argv/envp and starts up |
| correctly. */ |
| |
| /* This is the canonical entry point, usually the first thing in the text |
| segment. The SVR4/i386 ABI (pages 3-31, 3-32) says that when the entry |
| point runs, most registers' values are unspecified, except for: |
| |
| %edx Contains a function pointer to be registered with `atexit'. |
| This is how the dynamic linker arranges to have DT_FINI |
| functions called for shared libraries that have been loaded |
| before this code runs. |
| |
| %esp The stack contains the arguments and environment: |
| 0(%esp) argc |
| 4(%esp) argv[0] |
| ... |
| (4*argc)(%esp) NULL |
| (4*(argc+1))(%esp) envp[0] |
| ... |
| NULL |
| */ |
| |
| /* The kernel hands control to _start, which extracts the initial |
| stack pointer and calls onwards to _start_in_C_linux. This also switches |
| the new stack. */ |
| #if defined(VGP_x86_linux) |
| asm("\n" |
| ".text\n" |
| "\t.globl _start\n" |
| "\t.type _start,@function\n" |
| "_start:\n" |
| /* set up the new stack in %eax */ |
| "\tmovl $vgPlain_interim_stack, %eax\n" |
| "\taddl $"VG_STRINGIFY(VG_STACK_GUARD_SZB)", %eax\n" |
| "\taddl $"VG_STRINGIFY(VG_STACK_ACTIVE_SZB)", %eax\n" |
| "\tsubl $16, %eax\n" |
| "\tandl $~15, %eax\n" |
| /* install it, and collect the original one */ |
| "\txchgl %eax, %esp\n" |
| /* call _start_in_C_linux, passing it the startup %esp */ |
| "\tpushl %eax\n" |
| "\tcall _start_in_C_linux\n" |
| "\thlt\n" |
| ".previous\n" |
| ); |
| #elif defined(VGP_amd64_linux) |
| asm("\n" |
| ".text\n" |
| "\t.globl _start\n" |
| "\t.type _start,@function\n" |
| "_start:\n" |
| /* set up the new stack in %rdi */ |
| "\tmovq $vgPlain_interim_stack, %rdi\n" |
| "\taddq $"VG_STRINGIFY(VG_STACK_GUARD_SZB)", %rdi\n" |
| "\taddq $"VG_STRINGIFY(VG_STACK_ACTIVE_SZB)", %rdi\n" |
| "\tandq $~15, %rdi\n" |
| /* install it, and collect the original one */ |
| "\txchgq %rdi, %rsp\n" |
| /* call _start_in_C_linux, passing it the startup %rsp */ |
| "\tcall _start_in_C_linux\n" |
| "\thlt\n" |
| ".previous\n" |
| ); |
| #elif defined(VGP_ppc32_linux) |
| asm("\n" |
| ".text\n" |
| "\t.globl _start\n" |
| "\t.type _start,@function\n" |
| "_start:\n" |
| /* set up the new stack in r16 */ |
| "\tlis 16,vgPlain_interim_stack@ha\n" |
| "\tla 16,vgPlain_interim_stack@l(16)\n" |
| "\tlis 17,("VG_STRINGIFY(VG_STACK_GUARD_SZB)" >> 16)\n" |
| "\tori 17,17,("VG_STRINGIFY(VG_STACK_GUARD_SZB)" & 0xFFFF)\n" |
| "\tlis 18,("VG_STRINGIFY(VG_STACK_ACTIVE_SZB)" >> 16)\n" |
| "\tori 18,18,("VG_STRINGIFY(VG_STACK_ACTIVE_SZB)" & 0xFFFF)\n" |
| "\tadd 16,17,16\n" |
| "\tadd 16,18,16\n" |
| "\trlwinm 16,16,0,0,27\n" |
| /* now r16 = &vgPlain_interim_stack + VG_STACK_GUARD_SZB + |
| VG_STACK_ACTIVE_SZB rounded down to the nearest 16-byte |
| boundary. And r1 is the original SP. Set the SP to r16 and |
| call _start_in_C_linux, passing it the initial SP. */ |
| "\tmr 3,1\n" |
| "\tmr 1,16\n" |
| "\tbl _start_in_C_linux\n" |
| "\ttrap\n" |
| ".previous\n" |
| ); |
| #elif defined(VGP_ppc64_linux) |
| asm("\n" |
| /* PPC64 ELF ABI says '_start' points to a function descriptor. |
| So we must have one, and that is what goes into the .opd section. */ |
| "\t.align 2\n" |
| "\t.global _start\n" |
| "\t.section \".opd\",\"aw\"\n" |
| "\t.align 3\n" |
| "_start:\n" |
| "\t.quad ._start,.TOC.@tocbase,0\n" |
| "\t.previous\n" |
| "\t.type ._start,@function\n" |
| "\t.global ._start\n" |
| "._start:\n" |
| /* set up the new stack in r16 */ |
| "\tlis 16, vgPlain_interim_stack@highest\n" |
| "\tori 16,16,vgPlain_interim_stack@higher\n" |
| "\tsldi 16,16,32\n" |
| "\toris 16,16,vgPlain_interim_stack@h\n" |
| "\tori 16,16,vgPlain_interim_stack@l\n" |
| "\txor 17,17,17\n" |
| "\tlis 17,("VG_STRINGIFY(VG_STACK_GUARD_SZB)" >> 16)\n" |
| "\tori 17,17,("VG_STRINGIFY(VG_STACK_GUARD_SZB)" & 0xFFFF)\n" |
| "\txor 18,18,18\n" |
| "\tlis 18,("VG_STRINGIFY(VG_STACK_ACTIVE_SZB)" >> 16)\n" |
| "\tori 18,18,("VG_STRINGIFY(VG_STACK_ACTIVE_SZB)" & 0xFFFF)\n" |
| "\tadd 16,17,16\n" |
| "\tadd 16,18,16\n" |
| "\trldicr 16,16,0,59\n" |
| /* now r16 = &vgPlain_interim_stack + VG_STACK_GUARD_SZB + |
| VG_STACK_ACTIVE_SZB rounded down to the nearest 16-byte |
| boundary. And r1 is the original SP. Set the SP to r16 and |
| call _start_in_C_linux, passing it the initial SP. */ |
| "\tmr 3,1\n" |
| "\tmr 1,16\n" |
| "\tbl ._start_in_C_linux\n" |
| "\tnop\n" |
| "\ttrap\n" |
| ); |
| #else |
| #error "_start: needs implementation on this platform" |
| #endif |
| |
| /* --- !!! --- EXTERNAL HEADERS start --- !!! --- */ |
| #define _GNU_SOURCE |
| #define _FILE_OFFSET_BITS 64 |
| /* This is in order to get AT_NULL and AT_PAGESIZE. */ |
| #include <elf.h> |
| /* --- !!! --- EXTERNAL HEADERS end --- !!! --- */ |
| |
| /* Avoid compiler warnings: this fn _is_ used, but labelling it |
| 'static' causes gcc to complain it isn't. */ |
| void _start_in_C_linux ( UWord* pArgc ); |
| void _start_in_C_linux ( UWord* pArgc ) |
| { |
| Int r; |
| Word argc = pArgc[0]; |
| HChar** argv = (HChar**)&pArgc[1]; |
| HChar** envp = (HChar**)&pArgc[1+argc+1]; |
| |
| VG_(memset)( &the_iicii, 0, sizeof(the_iicii) ); |
| VG_(memset)( &the_iifii, 0, sizeof(the_iifii) ); |
| |
| the_iicii.sp_at_startup = (Addr)pArgc; |
| |
| # if defined(VGP_ppc32_linux) || defined(VGP_ppc64_linux) |
| { |
| /* ppc/ppc64 can be configured with different page sizes. |
| Determine this early. This is an ugly hack and really should |
| be moved into valgrind_main. */ |
| UWord *sp = &pArgc[1+argc+1]; |
| while (*sp++ != 0) |
| ; |
| for (; *sp != AT_NULL && *sp != AT_PAGESZ; sp += 2); |
| if (*sp == AT_PAGESZ) { |
| VKI_PAGE_SIZE = sp[1]; |
| for (VKI_PAGE_SHIFT = 12; |
| VKI_PAGE_SHIFT <= VKI_MAX_PAGE_SHIFT; VKI_PAGE_SHIFT++) |
| if (VKI_PAGE_SIZE == (1UL << VKI_PAGE_SHIFT)) |
| break; |
| } |
| } |
| # endif |
| |
| r = valgrind_main( (Int)argc, argv, envp ); |
| /* NOTREACHED */ |
| VG_(exit)(r); |
| } |
| |
| #endif /* defined(VGO_linux) */ |
| |
| |
| /*====================================================================*/ |
| /*=== Getting to main() alive: AIX5 ===*/ |
| /*====================================================================*/ |
| |
| #if defined(VGP_ppc32_aix5) || defined(VGP_ppc64_aix5) |
| |
| /* This is somewhat simpler than the Linux case. _start_valgrind |
| receives control from the magic piece of code created in this |
| process' address space by the launcher, via use of ptrace(). At |
| the point of entry: |
| |
| - the initial client process image is in memory and ready to roll, |
| except that we've partially trashed its integer register state |
| in order to get this far. So .. |
| |
| - intregs37 holds the client's initial integer register state, so |
| we can restore it before starting the client on the VCPU. |
| |
| - we're on the client's stack. This is not good; therefore the |
| first order of business is to switch to our temporary stack. |
| |
| - the client's initial argc/v/envp is in r3/r4/r5 (32 bit mode) or |
| r14/r15/r16 (64 bit mode). They are pulled out of the stashed |
| integer register state and passed to our main(). |
| |
| The launcher will have played some games with argv. If the launcher |
| ($prefix/bin/valgrind) was started like this |
| |
| valgrind [args-for-V] app [args-for-app] |
| |
| then the launcher will have started the client as |
| |
| app [args-for-V] app [args-for-app] |
| |
| m_initimg will have to mess with the client's initial r4/r5 |
| (32-bit) or r15/r16 (64-bit) so that it believes it was execd as |
| "app [args-for-app]". Well, that's no big deal. |
| */ |
| |
| #include "launcher-aix5-bootblock.h" |
| |
| void _start_in_C_aix5 ( AIX5Bootblock* bootblock ); |
| void _start_in_C_aix5 ( AIX5Bootblock* bootblock ) |
| { |
| Int r; |
| ULong* intregs37; |
| UWord argc, argv, envp; |
| __NR_getpid = bootblock->__NR_getpid; |
| __NR_write = bootblock->__NR_write; |
| __NR_exit = bootblock->__NR_exit; |
| __NR_open = bootblock->__NR_open; |
| __NR_read = bootblock->__NR_read; |
| __NR_close = bootblock->__NR_close; |
| |
| VG_(memset)( &the_iicii, 0, sizeof(the_iicii) ); |
| VG_(memset)( &the_iifii, 0, sizeof(the_iifii) ); |
| |
| intregs37 = &bootblock->iregs_pc_cr_lr_ctr_xer[0]; |
| the_iicii.intregs37 = intregs37; |
| the_iicii.bootblock = (void*)bootblock; |
| the_iicii.adler32_exp = bootblock->adler32; |
| |
| /* Not important on AIX. */ |
| the_iicii.sp_at_startup = (Addr)0x31415927ULL; |
| |
| # if defined(VGP_ppc32_aix5) |
| argc = (UWord)intregs37[3]; /* client's r3 == argc */ |
| argv = (UWord)intregs37[4]; |
| envp = (UWord)intregs37[5]; |
| # else /* defined(VGP_ppc64_aix5) */ |
| argc = (UWord)intregs37[14]; /* client's r14 == argc */ |
| argv = (UWord)intregs37[15]; |
| envp = (UWord)intregs37[16]; |
| # endif |
| |
| r = valgrind_main( (Int)argc, (HChar**)argv, (HChar**)envp ); |
| |
| /* NOTREACHED */ |
| VG_(exit)(r); |
| } |
| |
| /* THE ENTRY POINT */ |
| void _start_valgrind ( AIX5Bootblock* bootblock ); |
| void _start_valgrind ( AIX5Bootblock* bootblock ) |
| { |
| /* Switch immediately to our temporary stack, and continue. This |
| is pretty dodgy in that it assumes that gcc does not place on |
| the stack, anything needed to form the _start_in_C_aix5 call, |
| since it will be on the old stack. */ |
| register UWord new_r1; |
| new_r1 = (UWord)&VG_(interim_stack); |
| new_r1 += VG_STACK_GUARD_SZB; /* step over lower guard page */ |
| new_r1 += VG_STACK_ACTIVE_SZB; /* step to top of active area */ |
| new_r1 -= 512; /* paranoia */ |
| __asm__ __volatile__("mr 1,%0" :/*wr*/ |
| :/*rd*/ "b"(new_r1) |
| :/*trash*/"r1","memory"); |
| _start_in_C_aix5(bootblock); |
| /*NOTREACHED*/ |
| VG_(exit)(0); |
| } |
| |
| /* At some point in Oct 2008, static linking appeared to stop working |
| on AIX 5.3. This breaks the build since we link statically. The |
| linking fails citing absence of the following five symbols as the |
| reason. In the absence of a better solution, here are stand-ins |
| for them. Kludge appears to work; presumably said functions, |
| assuming they are indeed functions, are never called. */ |
| void encrypted_pw_passlen ( void ) { vg_assert(0); } |
| void crypt_r ( void ) { vg_assert(0); } |
| void max_history_size ( void ) { vg_assert(0); } |
| void getpass_auto ( void ) { vg_assert(0); } |
| void max_pw_passlen ( void ) { vg_assert(0); } |
| |
| #endif /* defined(VGP_ppc{32,64}_aix5) */ |
| |
| |
| /*--------------------------------------------------------------------*/ |
| /*--- end ---*/ |
| /*--------------------------------------------------------------------*/ |