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Diffstat (limited to 'coregrind/.svn/text-base/m_main.c.svn-base')
| -rw-r--r-- | coregrind/.svn/text-base/m_main.c.svn-base | 2623 |
1 files changed, 2623 insertions, 0 deletions
diff --git a/coregrind/.svn/text-base/m_main.c.svn-base b/coregrind/.svn/text-base/m_main.c.svn-base new file mode 100644 index 0000000..0f9aac6 --- /dev/null +++ b/coregrind/.svn/text-base/m_main.c.svn-base @@ -0,0 +1,2623 @@ + +/*--------------------------------------------------------------------*/ +/*--- 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 ---*/ +/*--------------------------------------------------------------------*/ |