1usage: valgrind [options] prog-and-args 2 3 tool-selection option, with default in [ ]: 4 --tool=<name> use the Valgrind tool named <name> [memcheck] 5 6 basic user options for all Valgrind tools, with defaults in [ ]: 7 -h --help show this message 8 --help-debug show this message, plus debugging options 9 --version show version 10 -q --quiet run silently; only print error msgs 11 -v --verbose be more verbose -- show misc extra info 12 --trace-children=no|yes Valgrind-ise child processes (follow execve)? [no] 13 --trace-children-skip=patt1,patt2,... specifies a list of executables 14 that --trace-children=yes should not trace into 15 --trace-children-skip-by-arg=patt1,patt2,... same as --trace-children-skip= 16 but check the argv[] entries for children, rather 17 than the exe name, to make a follow/no-follow decision 18 --child-silent-after-fork=no|yes omit child output between fork & exec? [no] 19 --vgdb=no|yes|full activate gdbserver? [yes] 20 full is slower but provides precise watchpoint/step 21 --vgdb-error=<number> invoke gdbserver after <number> errors [999999999] 22 to get started quickly, use --vgdb-error=0 23 and follow the on-screen directions 24 --vgdb-stop-at=event1,event2,... invoke gdbserver for given events [none] 25 where event is one of: 26 startup exit valgrindabexit all none 27 --track-fds=no|yes track open file descriptors? [no] 28 --time-stamp=no|yes add timestamps to log messages? [no] 29 --log-fd=<number> log messages to file descriptor [2=stderr] 30 --log-file=<file> log messages to <file> 31 --log-socket=ipaddr:port log messages to socket ipaddr:port 32 33 user options for Valgrind tools that report errors: 34 --xml=yes emit error output in XML (some tools only) 35 --xml-fd=<number> XML output to file descriptor 36 --xml-file=<file> XML output to <file> 37 --xml-socket=ipaddr:port XML output to socket ipaddr:port 38 --xml-user-comment=STR copy STR verbatim into XML output 39 --demangle=no|yes automatically demangle C++ names? [yes] 40 --num-callers=<number> show <number> callers in stack traces [12] 41 --error-limit=no|yes stop showing new errors if too many? [yes] 42 --error-exitcode=<number> exit code to return if errors found [0=disable] 43 --error-markers=<begin>,<end> add lines with begin/end markers before/after 44 each error output in plain text mode [none] 45 --show-below-main=no|yes continue stack traces below main() [no] 46 --default-suppressions=yes|no 47 load default suppressions [yes] 48 --suppressions=<filename> suppress errors described in <filename> 49 --gen-suppressions=no|yes|all print suppressions for errors? [no] 50 --input-fd=<number> file descriptor for input [0=stdin] 51 --dsymutil=no|yes run dsymutil on Mac OS X when helpful? [yes] 52 --max-stackframe=<number> assume stack switch for SP changes larger 53 than <number> bytes [2000000] 54 --main-stacksize=<number> set size of main thread's stack (in bytes) 55 [min(max(current 'ulimit' value,1MB),16MB)] 56 57 user options for Valgrind tools that replace malloc: 58 --alignment=<number> set minimum alignment of heap allocations [not used by this tool] 59 --redzone-size=<number> set minimum size of redzones added before/after 60 heap blocks (in bytes). [not used by this tool] 61 62 uncommon user options for all Valgrind tools: 63 --fullpath-after= (with nothing after the '=') 64 show full source paths in call stacks 65 --fullpath-after=string like --fullpath-after=, but only show the 66 part of the path after 'string'. Allows removal 67 of path prefixes. Use this flag multiple times 68 to specify a set of prefixes to remove. 69 --extra-debuginfo-path=path absolute path to search for additional 70 debug symbols, in addition to existing default 71 well known search paths. 72 --debuginfo-server=ipaddr:port also query this server 73 (valgrind-di-server) for debug symbols 74 --allow-mismatched-debuginfo=no|yes [no] 75 for the above two flags only, accept debuginfo 76 objects that don't "match" the main object 77 --smc-check=none|stack|all|all-non-file [all-non-file] 78 checks for self-modifying code: none, only for 79 code found in stacks, for all code, or for all 80 code except that from file-backed mappings 81 --read-inline-info=yes|no read debug info about inlined function calls 82 and use it to do better stack traces. [yes] 83 on Linux/Android/Solaris for Memcheck/Helgrind/DRD 84 only. [no] for all other tools and platforms. 85 --read-var-info=yes|no read debug info on stack and global variables 86 and use it to print better error messages in 87 tools that make use of it (Memcheck, Helgrind, 88 DRD) [no] 89 --vgdb-poll=<number> gdbserver poll max every <number> basic blocks [5000] 90 --vgdb-shadow-registers=no|yes let gdb see the shadow registers [no] 91 --vgdb-prefix=<prefix> prefix for vgdb FIFOs [.../vgdb-pipe] 92 --run-libc-freeres=no|yes free up glibc memory at exit on Linux? [yes] 93 --sim-hints=hint1,hint2,... activate unusual sim behaviours [none] 94 where hint is one of: 95 lax-ioctls lax-doors fuse-compatible enable-outer 96 no-inner-prefix no-nptl-pthread-stackcache none 97 --fair-sched=no|yes|try schedule threads fairly on multicore systems [no] 98 --kernel-variant=variant1,variant2,... 99 handle non-standard kernel variants [none] 100 where variant is one of: 101 bproc android-no-hw-tls 102 android-gpu-sgx5xx android-gpu-adreno3xx none 103 --merge-recursive-frames=<number> merge frames between identical 104 program counters in max <number> frames) [0] 105 --num-transtab-sectors=<number> size of translated code cache [16] 106 more sectors may increase performance, but use more memory. 107 --avg-transtab-entry-size=<number> avg size in bytes of a translated 108 basic block [0, meaning use tool provided default] 109 --aspace-minaddr=0xPP avoid mapping memory below 0xPP [guessed] 110 --valgrind-stacksize=<number> size of valgrind (host) thread's stack 111 (in bytes) [1048576] 112 --show-emwarns=no|yes show warnings about emulation limits? [no] 113 --require-text-symbol=:sonamepattern:symbolpattern abort run if the 114 stated shared object doesn't have the stated 115 text symbol. Patterns can contain ? and *. 116 --soname-synonyms=syn1=pattern1,syn2=pattern2,... synonym soname 117 specify patterns for function wrapping or replacement. 118 To use a non-libc malloc library that is 119 in the main exe: --soname-synonyms=somalloc=NONE 120 in libxyzzy.so: --soname-synonyms=somalloc=libxyzzy.so 121 --sigill-diagnostics=yes|no warn about illegal instructions? [yes] 122 --unw-stack-scan-thresh=<number> Enable stack-scan unwind if fewer 123 than <number> good frames found [0, meaning "disabled"] 124 NOTE: stack scanning is only available on arm-linux. 125 --unw-stack-scan-frames=<number> Max number of frames that can be 126 recovered by stack scanning [5] 127 --resync-filter=no|yes|verbose [yes on MacOS, no on other OSes] 128 attempt to avoid expensive address-space-resync operations 129 --max-threads=<number> maximum number of threads that valgrind can 130 handle [500] 131 132 user options for Nulgrind: 133 (none) 134 135 debugging options for all Valgrind tools: 136 -d show verbose debugging output 137 --stats=no|yes show tool and core statistics [no] 138 --sanity-level=<number> level of sanity checking to do [1] 139 --trace-flags=<XXXXXXXX> show generated code? (X = 0|1) [00000000] 140 --profile-flags=<XXXXXXXX> ditto, but for profiling (X = 0|1) [00000000] 141 --profile-interval=<number> show profile every <number> event checks 142 [0, meaning only at the end of the run] 143 --trace-notbelow=<number> only show BBs above <number> [999999999] 144 --trace-notabove=<number> only show BBs below <number> [0] 145 --trace-syscalls=no|yes show all system calls? [no] 146 --trace-signals=no|yes show signal handling details? [no] 147 --trace-symtab=no|yes show symbol table details? [no] 148 --trace-symtab-patt=<patt> limit debuginfo tracing to obj name <patt> 149 --trace-cfi=no|yes show call-frame-info details? [no] 150 --debug-dump=syms mimic /usr/bin/readelf --syms 151 --debug-dump=line mimic /usr/bin/readelf --debug-dump=line 152 --debug-dump=frames mimic /usr/bin/readelf --debug-dump=frames 153 --trace-redir=no|yes show redirection details? [no] 154 --trace-sched=no|yes show thread scheduler details? [no] 155 --profile-heap=no|yes profile Valgrind's own space use 156 --core-redzone-size=<number> set minimum size of redzones added before/after 157 heap blocks allocated for Valgrind internal use (in bytes) [4] 158 --wait-for-gdb=yes|no pause on startup to wait for gdb attach 159 --sym-offsets=yes|no show syms in form 'name+offset' ? [no] 160 --command-line-only=no|yes only use command line options [no] 161 162 Vex options for all Valgrind tools: 163 --vex-iropt-verbosity=<0..9> [0] 164 --vex-iropt-level=<0..2> [2] 165 --vex-iropt-unroll-thresh=<0..400> [120] 166 --vex-guest-max-insns=<1..100> [50] 167 --vex-guest-chase-thresh=<0..99> [10] 168 --vex-guest-chase-cond=no|yes [no] 169 Precise exception control. Possible values for 'mode' are as follows 170 and specify the minimum set of registers guaranteed to be correct 171 immediately prior to memory access instructions: 172 sp-at-mem-access stack pointer only 173 unwindregs-at-mem-access registers needed for stack unwinding 174 allregs-at-mem-access all registers 175 allregs-at-each-insn all registers are always correct 176 Default value for all 3 following flags is [unwindregs-at-mem-access]. 177 --vex-iropt-register-updates=mode setting to use by default 178 --px-default=mode synonym for --vex-iropt-register-updates 179 --px-file-backed=mode optional setting for file-backed (non-JIT) code 180 Tracing and profile control: 181 --trace-flags and --profile-flags values (omit the middle space): 182 1000 0000 show conversion into IR 183 0100 0000 show after initial opt 184 0010 0000 show after instrumentation 185 0001 0000 show after second opt 186 0000 1000 show after tree building 187 0000 0100 show selecting insns 188 0000 0010 show after reg-alloc 189 0000 0001 show final assembly 190 0000 0000 show summary profile only 191 (Nb: you need --trace-notbelow and/or --trace-notabove 192 with --trace-flags for full details) 193 194 debugging options for Valgrind tools that report errors 195 --dump-error=<number> show translation for basic block associated 196 with <number>'th error context [0=show none] 197 198 debugging options for Valgrind tools that replace malloc: 199 --trace-malloc=no|yes show client malloc details? [no] 200 201 debugging options for Nulgrind: 202 (none) 203 204 Extra options read from ~/.valgrindrc, $VALGRIND_OPTS, ./.valgrindrc 205 206 Nulgrind is Copyright (C) 2002-2015, and GNU GPL'd, by Nicholas Nethercote. 207 Valgrind is Copyright (C) 2000-2015, and GNU GPL'd, by Julian Seward et al. 208 LibVEX is Copyright (C) 2004-2015, and GNU GPL'd, by OpenWorks LLP et al. 209 210 Bug reports, feedback, admiration, abuse, etc, to: www.valgrind.org. 211 212