usage: valgrind [options] prog-and-args

  tool-selection option, with default in [ ]:
    --tool=<name>             use the Valgrind tool named <name> [memcheck]

  basic user options for all Valgrind tools, with defaults in [ ]:
    -h --help                 show this message
    --help-debug              show this message, plus debugging options
    --version                 show version
    -q --quiet                run silently; only print error msgs
    -v --verbose              be more verbose -- show misc extra info
    --trace-children=no|yes   Valgrind-ise child processes (follow execve)? [no]
    --trace-children-skip=patt1,patt2,...    specifies a list of executables
                              that --trace-children=yes should not trace into
    --child-silent-after-fork=no|yes omit child output between fork & exec? [no]
    --track-fds=no|yes        track open file descriptors? [no]
    --time-stamp=no|yes       add timestamps to log messages? [no]
    --log-fd=<number>         log messages to file descriptor [2=stderr]
    --log-file=<file>         log messages to <file>
    --log-socket=ipaddr:port  log messages to socket ipaddr:port

  user options for Valgrind tools that report errors:
    --xml=yes                 emit error output in XML (some tools only)
    --xml-fd=<number>         XML output to file descriptor
    --xml-file=<file>         XML output to <file>
    --xml-socket=ipaddr:port  XML output to socket ipaddr:port
    --xml-user-comment=STR    copy STR verbatim into XML output
    --demangle=no|yes         automatically demangle C++ names? [yes]
    --num-callers=<number>    show <number> callers in stack traces [12]
    --error-limit=no|yes      stop showing new errors if too many? [yes]
    --error-exitcode=<number> exit code to return if errors found [0=disable]
    --show-below-main=no|yes  continue stack traces below main() [no]
    --suppressions=<filename> suppress errors described in <filename>
    --gen-suppressions=no|yes|all    print suppressions for errors? [no]
    --db-attach=no|yes        start debugger when errors detected? [no]
    --db-command=<command>    command to start debugger [/usr/bin/gdb -nw %f %p]
    --input-fd=<number>       file descriptor for input [0=stdin]
    --dsymutil=no|yes         run dsymutil on Mac OS X when helpful? [no]
    --max-stackframe=<number> assume stack switch for SP changes larger
                              than <number> bytes [2000000]
    --main-stacksize=<number> set size of main thread's stack (in bytes)
                              [use current 'ulimit' value]

  user options for Valgrind tools that replace malloc:
    --alignment=<number>      set minimum alignment of heap allocations [16]

  uncommon user options for all Valgrind tools:
    --smc-check=none|stack|all  checks for self-modifying code: none,
                              only for code found in stacks, or all [stack]
    --read-var-info=yes|no    read debug info on stack and global variables
                              and use it to print better error messages in
                              tools that make use of it (Memcheck, Helgrind,
                              DRD) [no]
    --run-libc-freeres=no|yes free up glibc memory at exit on Linux? [yes]
    --sim-hints=hint1,hint2,...  known hints:
                                 lax-ioctls, enable-outer [none]
    --kernel-variant=variant1,variant2,...  known variants: bproc [none]
                              handle non-standard kernel variants
    --show-emwarns=no|yes     show warnings about emulation limits? [no]
    --require-text-symbol=:sonamepattern:symbolpattern    abort run if the
                              stated shared object doesn't have the stated
                              text symbol.  Patterns can contain ? and *.

  user options for Memcheck:
    --leak-check=no|summary|full     search for memory leaks at exit?  [summary]
    --leak-resolution=low|med|high   differentiation of leak stack traces [high]
    --show-reachable=no|yes          show reachable blocks in leak check? [no]
    --undef-value-errors=no|yes      check for undefined value errors [yes]
    --track-origins=no|yes           show origins of undefined values? [no]
    --partial-loads-ok=no|yes        too hard to explain here; see manual [no]
    --freelist-vol=<number>          volume of freed blocks queue [10000000]
    --workaround-gcc296-bugs=no|yes  self explanatory [no]
    --ignore-ranges=0xPP-0xQQ[,0xRR-0xSS]   assume given addresses are OK
    --malloc-fill=<hexnumber>        fill malloc'd areas with given value
    --free-fill=<hexnumber>          fill free'd areas with given value

  Extra options read from ~/.valgrindrc, $VALGRIND_OPTS, ./.valgrindrc

  Memcheck is Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al.
  Valgrind is Copyright (C) 2000-2010, and GNU GPL'd, by Julian Seward et al.
  LibVEX is Copyright (C) 2004-2010, and GNU GPL'd, by OpenWorks LLP.

  Bug reports, feedback, admiration, abuse, etc, to: www.valgrind.org.